WO2025149071A1 - Planing cutter - Google Patents

Abstract

The present invention provides a planing cutter, comprising a cutter tube assembly. The cutter tube assembly comprises an inner cutter tube and an outer cutter tube, and the inner cutter tube can rotate relative to the outer cutter tube. In the present application, the cutter tube assembly, a power assembly, a negative-pressure suction assembly, and a water injection assembly are integrated in a housing to form an integrated structure, which requires no additional handles, thus facilitating cleaning and maintenance. The cutter tube assembly can be driven by the power assembly to rotate to perform planing operation on a target position of a patient; the negative-pressure suction assembly can suck out fragmented tissues generated by the planing. The water injection assembly can inject a liquid to the target position of the patient. The integration of multiple functions on the planing cutter of the integrated structure provides good adaptation to more working situations. The contact surface of a transverse mounting part of a mounting base with a motor is configured into a concave arc surface, so as to increase the contact area between the motor and the transverse mounting part of the mounting base and thereby improve the cooling effect on the motor.

Description

Planing tools Technical Field

The invention relates to the technical field of medical instruments, in particular to a planing tool.

Background Art

In spinal surgery, orthopedics and neurosurgery, it is necessary to grind and cut diseased bone tissue and open internal channels by rotating planing and grinding. In traditional technology, the outer blade tube of a medical planer tool is usually fixed on a driving handle, and the driving handle drives the inner blade tube to rotate at a high frequency relative to its own axis, and the inner blade tube rotates relative to the outer blade tube to remove cartilage tissue.

In the existing Chinese patent application document with publication number CN116269661A, a medical soft tissue planing blade assembly is disclosed, including a blade assembly, a reducer assembly, an outer shell, a suction device, and an interface part. The blade assembly includes a hollow outer blade assembly and an inner blade assembly, and the suction device includes a negative pressure suction pipe, and the negative pressure suction pipe is connected to the cavity of the inner blade assembly. The above-mentioned medical soft tissue planing blade assembly separates the blade assembly from the driver to change the connection path of the negative pressure suction pipe, which can effectively protect the motor from damage, but the cooling effect is poor, and water cannot be actively injected into the working position.

The Chinese patent application document with the existing publication number CN116370036A discloses a medical soft tissue planing tool, including a planing tool assembly, a reducer assembly, an outer shell, a motor and a suction device. The planing tool assembly includes a hollow outer knife assembly and an inner knife assembly. The inner knife assembly is sleeved in the outer knife assembly. The reducer assembly is fixed in the outer shell. The reducer assembly includes a reducer housing and a transmission gear set. The other end of the outer knife assembly is connected to the reducer housing. The transmission gear set is respectively connected to the other end of the inner knife assembly and the output end of the motor. The suction device includes a suction valve and a suction pipe. The above-mentioned reducer assembly drives the planing tool assembly to rotate back and forth, and uses the suction device to suck out the soft tissue. At the same time, an adjustment device is also provided to adjust the state of suction use, which is more suitable for a specific surgical operation environment, but the cooling effect is poor, and water cannot be actively injected into the working position.

The existing Chinese patent application document with publication number CN221205577U discloses a planing handle, including a handle with a motor sleeve, and a male connector of a wiring harness connected to the handle, a tool identification device is provided at one end of the handle, and a buckle is provided at the other end, and a water pipe groove is provided on the handle at a position corresponding to the position between the tool identification device and the buckle. The above-mentioned tool identification device is convenient for identifying tool information and improving the use efficiency, the buckle is convenient for connecting the housing with the tool inserted, and the water pipe groove is convenient for heat dissipation of the handle. The structure is simple and compact, and it is easy to use. However, the split structure is inconvenient to clean and has a poor cooling effect.

The existing Chinese patent application document with publication number CN221469949U discloses a planer head assembly and a planer, wherein the head assembly includes an outer head and an inner head, an outer planing window is provided on the outer head, an inner planing window is provided on the inner head, an outer planing tooth is provided on the outer planing window, and an inner planing tooth is provided on the inner planing window; the inner planing tooth includes a first inner tooth edge, a first outer tooth edge and a first tooth top intersection line, the height of the inner vertex of the first tooth top intersection line is lower than the height of the outer vertex, and the outer planing tooth includes a second inner tooth edge, a second outer tooth edge and a second tooth top intersection line, the height of the inner vertex of the second tooth top intersection line is higher than the height of the outer vertex; the planer also includes an inner tube, an outer tube and a handle, a power mechanism and a front adapter sleeve for driving the inner tube to rotate are provided in the handle, and the outer tube is fixedly connected to the front adapter sleeve; the inner tube is fixedly connected to the inner head, and the outer tube is fixedly connected to the outer head. The above-mentioned planer head assembly is easier to cut the planed tissue and improves the surgical efficiency. However, the cooling effect is poor.

At present, the market is in urgent need of an integrated planing tool with good cooling effect and the ability to actively inject water into the working position.

Summary of the invention

In view of the defects in the prior art, an object of the present invention is to provide a planing tool.

A planing tool provided according to the present invention comprises a knife tube assembly, wherein the knife tube assembly comprises an inner knife tube and an outer knife tube, and the inner knife tube can rotate relative to the outer knife tube.

Preferably, it also includes a housing, a power assembly, and a negative pressure suction assembly;

The power assembly is arranged in the housing, one end of the knife tube assembly extends into the housing, the outer knife tube is fixedly connected to the housing, and the inner knife tube is drivingly connected to the output end of the power assembly;

One end of the negative pressure suction component extends into the interior of the shell and communicates with the cavity of the inner knife tube, and the other end of the negative pressure suction component extends from the shell.

Preferably, it also includes a water injection assembly, wherein the end of the knife tube assembly away from the shell has a water outlet, a water injection gap is formed between the inner wall of the outer knife tube and the outer wall of the inner knife tube, the water injection gap is connected with the water outlet, one end of the water injection assembly extends into the shell and is connected with the water injection gap between the outer knife tube and the inner knife tube, and the other end of the water injection assembly extends from the shell.

Preferably, the power assembly comprises a mounting base, a motor and a gear speed change structure, the mounting base is fixedly mounted in the housing, the motor is placed on a transverse mounting portion of the mounting base, the output end of the motor is fitted with a vertical mounting portion of the mounting base, and the output shaft of the motor passes through the vertical mounting portion of the mounting base;

The gear speed change structure includes a driving gear, a double transmission gear and a driven gear. The driving gear is coaxially fixedly connected to the output shaft of the motor. The double transmission gear is rotatably installed on the vertical mounting portion of the mounting base through a rotating shaft. The driven gear is transmission-connected to the inner knife tube. The double transmission gear transmission-connects the driving gear and the driven gear.

Preferably, the negative pressure suction assembly comprises a negative pressure suction pipe and a regulating valve, one end of the inner knife tube extending into the shell extends into the transverse mounting portion of the mounting base, one end of the negative pressure suction pipe extends into the transverse mounting portion of the mounting base, and the other end of the negative pressure suction pipe extends out of the shell;

The regulating valve is rotatably mounted on the transverse mounting portion of the mounting base, and is used to connect or disconnect the negative pressure suction pipe and the inner knife pipe, and the regulating portion of the regulating valve is located outside the housing;

A sealing ring is respectively provided at the connection between the inner knife tube and the transverse mounting portion of the mounting base, and at the rotation connection between the regulating valve and the transverse mounting portion of the mounting base.

Preferably, a limiting tube is sleeved on the negative pressure suction tube, one end of the limiting tube abuts against the rear end surface of the transverse mounting portion of the mounting base, and the other end of the limiting tube abuts against the rib plate in the shell.

Preferably, the contact surface between the transverse mounting portion of the mounting base and the motor is a concave arc surface.

Preferably, the outer knife tube is fixedly connected to the front end of the transverse mounting portion of the mounting base through a fixed connecting sleeve;

The water injection assembly includes a water injection pipe, one end of which is located inside the shell, and the other end of which extends out of the shell. The fixed connection sleeve is provided with a water injection connection hole, and one end of the water injection pipe located inside the shell is connected to the water injection connection hole, and the water injection connection hole is connected to the water injection gap between the outer knife tube and the inner knife tube;

A sealing ring and a bearing are arranged between the end of the fixed connection sleeve close to the mounting base and the inner knife tube.

According to a drill bit structure for planing provided by the present invention, one end of the inner cutter tube is coaxially fixedly connected with a drill bit, the drill bit rotates relative to the outer cutter tube, and the internal channel of the drill bit is connected with the internal pipeline of the inner cutter tube;

The drill bit is provided with radial suction channels, which are evenly distributed along the circumference of the drill bit, and any of the radial suction channels is communicated with the internal channel of the drill bit.

A planing drill bit assembly provided according to the present invention comprises a cutter tube assembly, wherein the cutter tube assembly comprises an inner cutter tube and an outer cutter tube, and the inner cutter tube can rotate relative to the outer cutter tube;

The outer knife tube comprises a double-layer tube wall, a water injection gap is formed between the double-layer tube walls of the outer knife tube, and a water outlet hole is provided on the drill bit connecting tube, and the water outlet hole is communicated with the water injection gap between the double-layer tube walls;

The rotary drill bit is provided with a suction hole, and the suction hole is communicated with the inner cavity of the inner knife tube.

Preferably, it also includes a rotary drill bit, a drill bit connecting tube and a power adapter sleeve, one end of the drill bit connecting tube extends into the outer cutter tube and is fixedly connected to the outer cutter tube, one end of the rotary drill bit passes through the drill bit connecting tube and extends into the inner cutter tube, the rotary drill bit is coaxially fixedly connected to the inner cutter tube through the power adapter sleeve, and the rotary drill bit is rotatably matched with the drill bit connecting tube;

The power adapter sleeve is abutted against one end of the drill bit connecting tube for limiting position, and the other end of the rotary drill bit has an abutting surface abutted against the other end of the drill bit connecting tube for limiting position.

According to a planer head for a planer tool provided by the present invention, an outer planing window is provided at one end of the outer knife tube, and outer planing teeth are provided on the outer planing window, and the outer planing teeth include a plurality of continuous tooth portions, and the tooth portions of any of the outer planing teeth are inclined outward; an inner planing window is provided at one end of the inner knife tube, and inner planing teeth are provided on the inner planing window, and the inner planing teeth include a plurality of continuous tooth portions, and the tooth portions of any of the inner planing teeth are inclined inward.

According to a planer head for a planer tool provided by the present invention, an outer planing window is provided at one end of the outer knife tube, and a continuous and smooth cutting edge is formed around the opening of the outer planing window; an inner planing window is provided at one end of the inner knife tube, and a tooth portion is respectively provided on two axially opposite side surfaces of the inner planing window, the two tooth portions are arranged opposite to each other, and a smooth cutting edge is formed around the opening of the inner planing window.

A rotary drive handle provided by the present invention is used to be sleeved on a knife tube assembly, wherein the knife tube assembly comprises an inner knife tube and an outer knife tube sleeved on the inner knife tube, and comprises:

A driving assembly, used for driving the outer knife tube to rotate relative to the inner knife tube, the driving assembly comprising a driving sleeve and a hand wheel, the driving sleeve is sleeved on the outer knife tube and used for driving the outer knife tube to rotate, the hand wheel is sleeved on the driving sleeve and used for driving the driving sleeve to rotate;

A limit assembly is used to limit the rotation of the drive sleeve and provide a gear sense for the rotation of the outer knife tube. The limit assembly is fixedly sleeved on the knife tube assembly, and one end of the limit assembly is inserted into the hand wheel and clamped with the drive sleeve;

The elastic member is used to drive the hand wheel to rotate and reset, and is installed between the driving sleeve and the hand wheel.

Preferably, the limiting member comprises an adapter sleeve, a plurality of limiting grooves are circumferentially arranged at equal distances on the outer wall of the adapter sleeve, the driving sleeve is provided with an elastic limiting cylinder, the limiting cylinder is adapted to the limiting groove, the hand wheel is provided with a limiting protrusion inside, when the driving sleeve is in a limiting locking state, the limiting cylinder is embedded in one of the limiting grooves, and the limiting protrusion contacts and abuts against the limiting cylinder;

The outer wall of the driving sleeve is provided with an elastic member installation groove and a protrusion sliding groove, the elastic member is located in the elastic member installation groove, and the limiting protrusion is slidably arranged in the protrusion sliding groove;

A front limit sleeve is installed between the driving sleeve and the knife tube assembly, the front limit sleeve is arranged on the knife tube assembly, the bushing is located in the driving sleeve, a rear limit sleeve is installed between the limit assembly and the knife tube assembly, the rear limit sleeve is arranged on the knife tube assembly, a fixing sleeve is installed between the rear limit sleeve and the front limit sleeve, and the fixing sleeve is arranged on the knife tube assembly;

The proximal end of the outer knife tube is located in the limiting assembly, and the inner knife tube passes through the limiting assembly and is connected to the external power mechanism.

According to a tool head steering structure provided by the present invention, the tool head steering structure is used to be sleeved on a tool tube assembly, the tool tube assembly includes an inner tool tube and an outer tool tube sleeved on the inner tool tube, the tool head steering structure includes a hand wheel, a fixed sleeve, a drive sleeve assembly and a steel ball, the drive sleeve assembly is fixedly sleeved on the outer tool tube, and is used to drive the outer tool tube to rotate relative to the inner tool tube;

The hand wheel is in transmission connection with the driving sleeve assembly, and the rotation of the hand wheel drives the driving sleeve assembly to rotate, and the hand wheel is sleeved on the fixed sleeve;

The steel ball is located inside the handwheel and is used to limit the rotation of the drive sleeve assembly;

The fixing sleeve is fixedly arranged, and is used to maintain the position of the steel ball and limit the axial sliding of the driving sleeve assembly; a spring is arranged between the hand wheel and the fixing sleeve, and is used to drive the hand wheel to slide and reset.

Preferably, the driving sleeve assembly comprises an orientation sleeve and a retaining ring, the retaining ring is fixedly sleeved on the orientation sleeve, the retaining ring rotates to drive the orientation sleeve to rotate, the orientation sleeve is sleeved on the outer knife tube, the orientation sleeve rotates to drive the outer knife tube to rotate;

The outer wall of one end of the directional sleeve is evenly provided with a plurality of arc grooves along the circumferential direction, and the hand wheel has a conical cavity inside. When the outer knife tube is in a locked state, one end of the steel ball is located in one of the arc grooves, and the inner wall of the conical cavity contacts and abuts against the steel ball.

A mounting ring is provided on the outer wall of one end of the directional sleeve, a plurality of arc-shaped grooves are arranged on the mounting ring, a clamping ring is provided on one end of the directional sleeve close to the directional sleeve, the mounting ring is located inside the fixing sleeve, and the clamping ring contacts and abuts against one end of the mounting ring;

The outer wall of the retaining ring is provided with a slot, the hand wheel is provided with a through hole at a position corresponding to the slot, a pin is passed through the through hole, and the pin is slidably arranged in the slot;

The fixing sleeve is provided with a steel ball hole, and the steel ball is inserted into the steel ball hole;

The knife tube assembly is provided with an adapter sleeve, the proximal end of the outer knife tube is located in the adapter sleeve, the proximal end of the inner knife tube passes through the adapter sleeve, the fixed sleeve is arranged on the adapter sleeve, and one end of the adapter sleeve contacts and abuts against the driving sleeve assembly.

According to a power handle provided by the present invention, the power handle is sleeved on a knife tube assembly, and the knife tube assembly includes an inner knife tube and an outer knife tube sleeved on the inner knife tube, including:

A driving assembly, used for driving the outer knife tube to rotate relative to the inner knife tube, the driving assembly comprises a hand wheel, a stopper sleeve and a steering sleeve, the steering sleeve is sleeved on the outer knife tube to drive the outer knife tube to rotate, the stopper sleeve is sleeved on the steering sleeve to drive the steering sleeve to rotate, and the hand wheel is sleeved on the stopper sleeve to drive the stopper sleeve to rotate;

Steel ball, used to limit the rotation of the steering sleeve;

A torsion spring is used to drive the hand wheel to reset and rotate, and the torsion spring is located between the stop sleeve and the hand wheel;

The fixed sleeve is used to maintain the position of the steel ball and limit the steering sleeve from sliding along the axial direction. The fixed sleeve is fixedly arranged inside the hand wheel.

Preferably, a plurality of steel ball grooves are evenly distributed in an annular direction on the outer wall of the steering sleeve, and a steel ball clearance groove is provided on the inner wall of the hand wheel, and both the steel ball groove and the steel ball clearance groove are adapted to the steel ball;

A ball pressing protrusion is arranged on the inner wall of the hand wheel for pressing the steel ball, and the ball pressing protrusion is located beside the steel ball yielding groove;

The stopper sleeve comprises a stopper plate and a connecting pipe which are coaxially fixedly connected, the stopper plate has a limiting notch, the inner wall of the hand wheel has a limiting protrusion, the limiting protrusion is slidably arranged in the limiting notch, the connecting pipe is located in the hand wheel, and the torsion spring is sleeved on the connecting pipe;

The connecting pipe has a limiting groove, and the steering sleeve is provided with a limiting column at a position corresponding to the limiting groove, and the limiting column is inserted into the limiting groove;

The steering sleeve is provided with a slotted ring, the steel ball groove is provided on the slotted ring, the slotted ring is located in the fixed sleeve, one end of the fixed sleeve has a limiting ring inside, one end of the limiting ring contacts and abuts against one end of the slotted ring;

The fixed sleeve is provided with a steel ball hole, and the steel ball is inserted into the steel ball hole. The power handle also includes a reducer. The proximal end of the inner knife tube is connected to the reducer, and the proximal end of the outer knife tube is located outside the reducer. The hollow interior of the inner knife tube constitutes a liquid suction channel, and the gap between the inner knife tube and the outer knife tube constitutes a water injection channel.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present application integrates the knife tube assembly, power assembly, negative pressure suction assembly and water injection assembly into the shell to form an integrated structure, which does not require an additional handle and is easy to clean and maintain. The power assembly can drive the knife tube assembly to rotate to perform planing operations on the target position of the patient, the negative pressure suction assembly can suck out the broken tissue produced by planing, and the water injection assembly can inject liquid into the target position of the patient, thereby integrating multiple functions into the planing tool with an integrated structure, being able to cope with more work scenarios and having strong applicability.

2. In the present application, the contact surface between the lateral mounting portion of the mounting base and the motor is a concave arc surface, thereby increasing the contact area between the motor and the lateral mounting portion of the mounting base and improving the cooling effect on the motor.

3. The driving gear and the double transmission gear of the present application are both single-sided support structures. Compared with the double-sided support structure, the single-sided support structure of the present application needs to consider the coaxial positioning problem during assembly, and the assembly is simple.

4. The present application provides sealing rings at the connection between the inner knife tube and the transverse mounting part of the mounting base, and at the rotational connection between the regulating valve and the transverse mounting part of the mounting base, respectively, to prevent the suction liquid from flowing out from the connection between the regulating valve and the mounting base, and the connection between the inner knife tube and the mounting base during the negative pressure suction process, which helps to improve the suction effect of the negative pressure suction channel.

5. The present application achieves positioning installation of the limiting tube by abutting one end of the limiting tube against the rear end surface of the transverse mounting portion of the mounting base and the other end of the limiting tube against the rib plate in the shell, thereby improving the stability of the negative pressure suction channel structure.

6. In this application, the inner blade of the cutter head is tilted inwards, and the outer blade of the cutter head is tilted outwards, and the peripheral surface of the outer blade tooth portion is reduced, so that the cutting edge is sharper and the cutting is sharper.

7. The present application provides a grip for shearing through a single tooth structure on two opposite sides of the inner planing window, and the blades of the inner planing window structure and the outer planing window structure are both continuous, with few burrs, sharp blades, and easy processing.

8. In the present application, the outer knife tube semi-encloses the drill bit to act as a sheath, thereby isolating the drill bit from normal tissue and reducing damage to normal tissue.

9. In the present application, the power adapter sleeve is abutted and limited with one end of the cutter head connecting tube, and the other end of the rotating cutter head has an abutment surface abutted and limited with the other end of the cutter head connecting tube, thereby achieving the limitation of the rotating cutter head.

10. The planing tool of the present application, on the one hand, can realize the relative rotation of the outer blade tube with respect to the inner blade tube by turning the hand wheel, and on the other hand, the setting of the water injection channel can flush and cool the planing part, and the setting of the suction channel can extract and absorb the waste liquid in the planing part, which can effectively improve the planing efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG1 is a cross-sectional view showing the overall structure of an integrated planing tool in Embodiment 1 of the present invention;

FIG2 is a cross-sectional view mainly showing the internal structure of the integrated planing tool housing in the first embodiment of the present invention;

FIG3 is a schematic diagram of the overall structure of a power assembly in Embodiment 1 of the present invention;

FIG4 is a schematic diagram of an integrated planing tool water injection assembly according to the first embodiment of the present invention;

FIG5 is a schematic diagram of a cutter head structure of a planing tool in Embodiment 1 of the present invention;

FIG6 is an exploded schematic diagram of another cutter head structure of a planing tool in the first embodiment of the present invention;

FIG7 is a schematic diagram of another cutter head structure of a planing tool in the first embodiment of the present invention;

FIG8 is a schematic diagram of the overall structure of a drill bit in Embodiment 1 of the present invention;

FIG9 is a cross-sectional view mainly showing the overall structure of the planing cutter head in the second embodiment of the present invention;

10 is a cross-sectional view of a rotating cutter head installation structure according to Embodiment 2 of the present invention;

FIG11 is a schematic diagram showing the structure of a rotating cutter head and a cutter head connecting cylinder in Embodiment 2 of the present invention;

FIG12 is a schematic diagram of an exploded structure of a rotary drive handle in Embodiment 3 of the present invention;

FIG13 is a schematic cross-sectional view of the rotary drive handle in the third embodiment of the present invention;

FIG14 is a schematic diagram of the structure of the rotary drive handle in the third embodiment of the present invention;

FIG15 is an enlarged structural diagram of a hand wheel mainly embodied in Embodiment 3 of the present invention;

FIG16 is an enlarged structural diagram of the driving sleeve in the third embodiment of the present invention;

FIG17 is an enlarged structural diagram of the adapter sleeve in the third embodiment of the present invention;

FIG18 is a schematic cross-sectional view of a cutter head steering structure in Embodiment 4 of the present invention;

FIG19 is a schematic diagram of an enlarged structure of point A in FIG18 in Embodiment 4 of the present invention;

FIG20 is a schematic diagram of the structure of the tool head steering structure in the fourth embodiment of the present invention;

FIG21 is a schematic diagram of an exploded structure mainly showing a cutter head steering structure in Embodiment 4 of the present invention;

FIG22 is a schematic cross-sectional view of the power handle in the fifth embodiment of the present invention;

FIG23 is a schematic diagram of an enlarged structure of point A in FIG22 in Embodiment 5 of the present invention;

FIG24 is a schematic diagram of the explosion structure of the power handle in the fifth embodiment of the present invention;

FIG25 is an enlarged structural schematic diagram of the retaining sleeve in the fifth embodiment of the present invention;

FIG26 is an enlarged structural diagram of a hand wheel mainly embodied in Embodiment 5 of the present invention;

FIG27 is an enlarged structural schematic diagram of a steering sleeve mainly embodied in Embodiment 5 of the present invention;

FIG28 is an enlarged structural diagram of a fixing sleeve in Embodiment 5 of the present invention;

FIG29 is a schematic diagram showing the structure of a planing tool in Embodiment 5 of the present invention;

FIG30 is a schematic diagram of the cross-sectional structure of the planing tool mainly embodied in the fifth embodiment of the present invention.

The figure shows:

Inner knife tube 110, outer knife tube 120, shell 1001, mounting base 1002, motor 1003, driving gear 1004, double transmission gear 1005, driven gear 1006, fixed connection sleeve 1007, bearing 1008, sealing ring 1009, negative pressure suction pipe 1010, regulating valve 1011, limit pipe 1012, water injection pipe 1013, water injection connection hole 1014, outer planing window 1015, inner planing window 1016, drill bit 1017, radial suction channel 1018, soft spring section 1019 , rotating cutter head 2001, cutter head connecting tube 2002, power adapter sleeve 2003, abutment surface 2004, water outlet 2005, suction channel 2006, drive sleeve 3210, limiting cylinder 3211, elastic member mounting groove 3212, protruding sliding groove 3213, block 3214, hand wheel 3220, limiting protrusion 3221, adapter sleeve 3310, limiting groove 3311, elastic member 3400, front limiting sleeve 3510, bushing 3520, rear limiting sleeve 3530, fixing sleeve 3540, sealing ring 3 550, hand wheel 4010, tapered cavity 4011, through hole 4012, fixing sleeve 4020, snap ring 4021, steel ball hole 4022, steel ball 4030, spring 4040, directional sleeve 4051, mounting ring 4511, arc groove 4512, retaining ring 4052, retaining groove 40521, pin 4060, adapter sleeve 4070, hand wheel 5210, steel ball yielding groove 5211, ball pressing protrusion 5212, limiting protrusion 5213, retaining sleeve 5220, baffle 5221, limiting notch 52211, connecting rod Taking over 5222, limiting groove 5223, steering sleeve 5230, steel ball groove 5231, slotted ring 5232, limiting ring 5520, steel ball 5300, torsion spring 5400, fixing sleeve 5500, steel ball hole 5510, reducer 5600, adapter sleeve 5610, sealing ring 5620, front shell 5710, rear shell 5720, suction channel 5800, suction joint 5810, suction pipe 5820, water injection channel 5900, water injection joint 5910, water injection pipe 5920, right angle joint 5930.

DETAILED DESCRIPTION

The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Embodiment 1

A planing tool provided according to the present invention, as shown in Figures 1 to 8, includes a knife tube assembly, the knife tube assembly includes an inner knife tube 110 and an outer knife tube 120, and the inner knife tube 110 can rotate relative to the outer knife tube 120. Specifically, it also includes a shell 1001, a power assembly, a negative pressure suction assembly and a water injection assembly. The power assembly is arranged in the shell 1001, one end of the knife tube assembly extends into the shell 1001, and the outer knife tube 120 is fixedly connected to the shell 1001, and the inner knife tube 110 is transmission-connected to the output end of the power assembly. One end of the negative pressure suction assembly extends into the shell 1001 and is connected to the cavity of the inner knife tube 110, and the other end of the negative pressure suction assembly extends from the shell 1001. One end of the knife tube assembly away from the shell 1001 has a water outlet, and a water injection gap is formed between the inner wall of the outer knife tube 120 and the outer wall of the inner knife tube 110. The water injection gap is connected to the water outlet, one end of the water injection assembly extends into the shell 1001 and is connected to the water injection gap between the outer knife tube 120 and the inner knife tube 110, and the other end of the water injection assembly extends from the shell 1001.

The planing tool of the technical solution of the present application integrates the knife tube assembly, power assembly, negative pressure suction assembly and water injection assembly on the shell 1001 to form an integrated structure, which does not require an additional handle and is easy to clean and maintain. The power assembly can drive the knife tube assembly to rotate to plan the target position of the patient, the negative pressure suction assembly can suck out the broken tissue produced by planing, and the water injection assembly can inject liquid into the target position of the patient, realizing the integration of multiple functions on the planing tool with an integrated structure, which can cope with more work scenarios and has strong applicability.

Specifically, the housing 1001 of the present application is composed of two half shells, the two half shells are arranged opposite to each other, and the opposite sides of the two half shells are concave and form a receiving cavity. Furthermore, ribs are arranged in the cavities of the two half shells for limiting the devices integrated in the housing 1001, and the ribs can also increase the structural strength of the housing 1001.

More specifically, the power assembly includes a mounting base 1002, a motor 1003 and a gear speed change structure. The mounting base 1002 is fixedly installed in the shell 1001. It should be noted that the installation of the mounting base 1002 in the shell 1001 can be fixed by a rib plate or by fasteners. The present application preferably uses a rib plate to limit the installation of the mounting base 1002.

The mounting base 1002 includes a transverse mounting portion and a vertical mounting portion. The transverse mounting portion of the mounting base 1002 mainly supports the motor 1003, and the vertical mounting portion of the mounting base 1002 mainly provides a mounting position and support for the gear speed change structure. The overall structure is simple and easy to process. The interior of the mounting base 1002 is provided with a through hole along the axial direction, and the through hole allows the negative pressure suction component to perform suction. When the negative pressure suction component is suctioning, the crushed tissue is sequentially extracted through the cavity of the inner knife tube 110, the through hole inside the mounting base 1002, and the negative pressure suction tube 1010, which realizes the suction of the crushed tissue on the one hand, and can cool the mounting base 1002 on the other hand, thereby cooling the motor 1003.

Specifically, the motor 1003 is placed on the horizontal mounting portion of the mounting base 1002, the output end of the motor 1003 is fitted with the vertical mounting portion of the mounting base 1002, and the output shaft of the motor 1003 passes through the vertical mounting portion of the mounting base 1002. In a feasible implementation, the output end of the motor 1003 is fastened to the vertical mounting portion of the mounting base 1002 by a fastener. Further, the contact surface between the horizontal mounting portion of the mounting base 1002 and the motor 1003 is a concave cambered surface, which increases the contact area between the motor 1003 and the horizontal mounting portion of the mounting base 1002, and improves the cooling effect on the motor 1003.

The gear speed change structure includes a driving gear 1004, a double transmission gear 1005 and a driven gear 1006. The driving gear 1004 is coaxially fixedly connected with the output shaft of the motor 1003. The double transmission gear 1005 is rotatably mounted on the vertical mounting portion of the mounting base 1002 through a rotating shaft. The driven gear 1006 is transmission-connected with the inner knife tube 110. The double transmission gear 1005 transmission-connects the driving gear 1004 and the driven gear 1006. It should be noted that one end of the rotating shaft of the double transmission gear 1005 is connected to the vertical mounting portion of the mounting base 1002, and the other end of the rotating shaft of the double transmission gear 1005 is fixedly connected to a limiting sleeve, and the double transmission gear 1005 rotates with the rotating shaft. It should be further noted that the driving gear 1004 and the double transmission gear 1005 of the present application are both single-sided support structures. Compared with the double-sided support structure, the single-sided support structure of the present application needs to consider the coaxial positioning problem during assembly, and the assembly is simple.

More specifically, the outer blade tube 120 is fixedly connected to the front end of the transverse mounting portion of the mounting base 1002 through the fixed connection sleeve 1007. One end of the fixed connection sleeve 1007 extends into the front end of the transverse mounting portion of the mounting base 1002 and is fixedly connected thereto. The other end of the fixed connection sleeve 1007 extends to the front end of the housing 1001 and is fixedly connected to the housing 1001. One end of the outer blade tube 120 extending into the housing 1001 extends into the interior of the fixed connection sleeve 1007 and is fixedly connected to the fixed connection sleeve 1007. The fixed connection sleeve 1007 has an axial through hole, and the inner blade tube 110 can pass through the axial through hole of the fixed connection sleeve 1007, and the inner blade tube 110 can rotate relative to the fixed connection sleeve 1007. The mounting base 1002 is provided with an avoidance groove, which allows the double transmission gear 1005 to mesh with the driven gear 1006 and ensures that the movement of the gear speed change structure does not interfere with the mounting base 1002.

The fixed connection sleeve 1007 is located at the front side of the avoidance groove, and a sealing ring 1009 and a bearing 1008 are arranged between the end of the fixed connection sleeve 1007 close to the mounting base 1002 and the inner knife tube 110. The sealing ring 1009 and the bearing 1008 are both arranged in the axial through hole of the fixed connection sleeve 1007. The bearing 1008 and the sealing ring 1009 are arranged between the part of the inner knife tube 110 located at the rear side of the avoidance groove and the through hole arranged axially inside the mounting base 1002, so as to realize stable support for the inner knife tube 110 and improve the stability of the rotation of the inner knife tube 110. The sealing rings 1009 located at the front and rear sides of the avoidance groove can prevent external liquid from entering the gear speed change structure, which helps to improve the service life of the gear speed change structure.

The negative pressure suction assembly includes a negative pressure suction tube 1010 and a regulating valve 1011. The negative pressure suction tube 1010 is a straight tube. One end of the inner knife tube 110 extending into the shell 1001 extends into the lateral mounting portion of the mounting base 1002, that is, one end of the inner knife tube 110 extending into the shell 1001 extends into the axial through hole of the mounting base 1002, one end of the negative pressure suction tube 1010 extends into the lateral mounting portion of the mounting base 1002, that is, one end of the negative pressure suction tube 1010 extending into the shell 1001 extends into the axial through hole of the mounting base 1002, and the other end of the negative pressure suction tube 1010 extends out of the shell 1001, thereby realizing the connection between the cavity of the inner knife tube 110 and the cavity of the negative pressure suction tube 1010.

The regulating valve 1011 is rotatably arranged on the transverse mounting portion of the mounting base 1002, and is used to connect or disconnect the negative pressure suction pipe 1010 and the inner blade tube 110, and the regulating portion of the regulating valve 1011 is located outside the housing 1001. The connection between the inner blade tube 110 and the transverse mounting portion of the mounting base 1002, and the rotation connection between the regulating valve 1011 and the transverse mounting portion of the mounting base 1002 are respectively provided with sealing rings 1009. Preventing the suction liquid from flowing out from the connection between the regulating valve 1011 and the mounting base 1002, and the connection between the inner blade tube 110 and the mounting base 1002 during the negative pressure suction process helps to improve the suction effect of the negative pressure suction channel.

Since the negative pressure suction tube 1010 needs to be connected to external equipment in actual use, a certain pulling force will be generated on the negative pressure suction tube 1010. In order to prevent the connection between the negative pressure suction tube 1010 and the mounting base 1002 from failing, the technical solution of the present application provides a feasible installation method: a limiting tube 1012 is coaxially sleeved on the negative pressure suction tube 1010, and one end of the limiting tube 1012 abuts against the rear end face of the transverse mounting portion of the mounting base 1002, and the other end of the limiting tube 1012 abuts against the rib plate in the shell 1001, thereby realizing the positioning installation of the limiting tube 1012 and improving the stability of the negative pressure suction channel structure.

The water injection assembly includes a water injection pipe 1013, one end of which is located inside the shell 1001, and the other end of the water injection pipe 1013 extends out of the shell 1001. A water injection connection hole 1014 is provided on the fixed connecting sleeve 1007. The end of the water injection pipe 1013 located inside the shell 1001 is connected to the water injection connection hole 1014, and the water injection connection hole 1014 is connected to the water injection gap between the outer knife tube 120 and the inner knife tube 110.

A water outlet is provided at the end of the knife tube assembly away from the shell 1001, and the water outlet is connected to the water injection gap. The water injection pipe 1013 can be connected to an external water source. The external water source first passes through the water injection pipe 1013, then enters the water injection gap between the outer knife tube 120 and the inner knife tube 110, and then flows out from the water outlet at the end of the knife tube assembly away from the shell 1001.

The present application proposes a planer head for a planing tool: an outer planing window 1015 is provided at one end of an outer blade tube 120, and outer planing teeth are provided on the outer planing window 1015. The outer planing teeth include a plurality of continuous tooth portions, and the tooth portions of any outer planing teeth are inclined outward. An inner planing window 1016 is provided at one end of an inner blade tube 110, and inner planing teeth are provided on the inner planing window 1016. The inner planing teeth include a plurality of continuous tooth portions, and the tooth portions of any inner planing teeth are inclined inward. The tooth portions of the outer planing teeth are staggered with the tooth portions of the inner planing teeth. With the help of the staggered tooth portions of the inner planing teeth and the outer planing teeth, the shear force of the blade tube assembly is improved. In this embodiment, the inner blade head blade portion is inclined inward, and the outer blade head blade portion is inclined outward. The peripheral surface of the outer blade head tooth portion is reduced, the blade edge is sharper, and the cutting is sharper. The knife tube assembly of this embodiment is mainly used for soft tissue. During negative pressure suction, the broken tissue enters the cavity of the inner knife tube 110 through the outer shaved window 1015 and the inner shaved window 1016, and is then discharged through the cavity of the negative pressure suction tube 1010.

The present application proposes another planing tool head: an outer planing window 1015 is provided at one end of the outer knife tube 120, and a continuous and smooth blade is formed at the opening of the outer planing window 1015. An inner planing window 1016 is provided at one end of the inner knife tube 110, and two opposite sides of the inner planing window 1016 are respectively provided with a tooth portion, and the two tooth portions are arranged oppositely, and the blade portion at the opening of the inner planing window 1016 is smooth and continuous. The single tooth structure on the two opposite sides of the inner planing window 1016 provides a grip for shearing, and the blade portion of the inner planing window 1016 structure and the blade portion of the outer planing window 1015 structure are both continuous, with few burrs, sharp blade portions, and convenient processing. The knife tube assembly of this embodiment is mainly for soft tissue. During negative pressure suction, the broken tissue enters the cavity of the inner knife tube 110 through the outer planing window 1015 and the inner planing window 1016, and then is discharged through the cavity of the negative pressure suction tube 1010.

The present application also proposes a drill bit structure, which can replace the planer head in the above-mentioned embodiment. A drill bit 1017 is coaxially fixedly connected to one end of the inner blade tube 110, and the drill bit 1017 rotates relative to the outer blade tube 120. The internal channel of the drill bit 1017 is connected to the internal pipeline of the inner blade tube 110. The drill bit 1017 is provided with radial suction channels 1018, which are evenly distributed along the circumference of the drill bit 1017. Any radial suction channel 1018 is connected to the internal channel of the drill bit 1017, and the outer blade tube 120 half surrounds the drill bit 1017. In a preferred embodiment, two symmetrical radial suction channels 1018 are provided on the drill bit 1017, and the two radial suction channels 1018 are connected to the internal channel of the drill bit 1017, which helps to improve the stability of the rotation of the drill bit 1017 and improve the dynamic balance. The drill bit 1017 of this embodiment is mainly used for harder tissues, such as bones. During negative pressure suction, the broken tissue enters the internal channel of the drill bit 1017 through the radial suction channel 1018, then enters the cavity of the inner blade tube 110, and then is discharged through the cavity of the negative pressure suction tube 1010. The outer blade tube 120 semi-surrounds the drill bit 1017 and acts as a sheath, which can isolate the drill bit 1017 from normal tissues and reduce damage to normal tissues. It should be noted that the drill bit 1017 of this embodiment does not need to add a water injection function.

The integrated planing tool of the technical solution of the present application can plan the tissue at the target position of the patient, and can extract the broken tissue produced by planing by means of negative pressure suction, and can inject water into the target position. With the help of the regulating valve 1011, when working in a confined space, such as the knee, the negative pressure suction channel can be blocked to prevent the liquid in the sealed space from accidentally flowing out through the negative pressure suction channel, thereby achieving controllable suction and adapting to more work scenarios. The design of the toothed edges of the inner knife tube 110 and the outer knife tube 120 improves the planing effect. The radial suction channels 1018 are evenly distributed along the circumference of the drill bit 1017, thereby improving the dynamic balance of the drill bit 1017.

It should be noted that the knife tube assembly of the present application can be a straight configuration, or a straight configuration on the side close to the housing 1001 and a curved configuration on the side away from the housing 1001. The straight configuration can make negative pressure suction smoother. When the knife tube assembly adopts a curved configuration on the side away from the housing 1001, the curved section of the inner catheter needs to be set as a flexible pipeline structure that can transmit torque. For example, the curved section adopts a soft spring section 1019 similar to a soft spring structure. Furthermore, a protective cover can be set on the outside of the soft spring section 1019.

It should be noted that the integrated planer structure of the present application can be integrated with cables and/or plugs, and the power supply and control of the motor 1003 can be realized through the cables and plugs integrated on the shell of the integrated planer structure. In a feasible implementation, the integrated planer structure of the present application is connected to the host through cables and/or plugs, and the integrated planer structure is controlled by foot pedals to perform planing operations or stop.

Embodiment 2

Based on the first embodiment, a planing drill bit assembly provided according to the present invention is mainly improved for the water injection gap on the cutter tube assembly and the cutter head assembly. As shown in Figures 9 to 11, it includes a cutter tube assembly, which includes an inner cutter tube 110 and an outer cutter tube 120, and the inner cutter tube 110 can rotate relative to the outer cutter tube 120. It also includes a rotating drill bit 2001, a drill bit connecting tube 2002 and a power adapter sleeve 2003, one end of the drill bit connecting tube 2002 extends into the outer cutter tube 120 and is fixedly connected to the outer cutter tube 120, one end of the rotating drill bit 2001 passes through the inside of the drill bit connecting tube 2002 and extends into the inner cutter tube 110, the rotating drill bit 2001 is coaxially fixedly connected to the inner cutter tube 110 through the power adapter sleeve 2003, and the rotating drill bit 2001 rotates in coordination with the drill bit connecting tube 2002. The power adapter sleeve 2003 abuts against one end of the drill bit connecting tube 2002 for limiting position, and the other end of the rotary drill bit 2001 has an abutting surface 2004 abutting against the other end of the drill bit connecting tube 2002 for limiting position.

The rotating drill bit 2001 in this embodiment mainly acts on harder tissues. The technical solution of this application uses a drill bit connecting tube 2002 fixedly connected to the outer tube to support the rotating drill bit 2001. The rotating drill bit 2001 is connected to the inner cutter tube 110 through a power adapter sleeve 2003. The power adapter sleeve 2003 is abutted and limited with one end of the drill bit connecting tube 2002. The other end of the rotating drill bit 2001 has an abutting surface 2004 abutted and limited with the other end of the drill bit connecting tube 2002, so as to limit the rotating drill bit 2001. In particular, when the side of the cutter tube assembly away from the housing adopts a curved configuration, the curved section from the inner tube to the tube needs to realize the transmission of torque. The curved section is set as a soft spring section. Since the soft spring section is easily stretched axially, if the rotating drill bit 2001 is not axially limited, the rotating drill bit 2001 will produce axial deviation during the operation, affecting the surgical effect.

It should be noted that: the outer blade tube 120 includes a double-layer tube wall, a water injection gap is formed between the double-layer tube walls of the outer blade tube 120, and a water outlet hole 2005 is provided on the drill bit connecting tube 2002, and the water outlet hole 2005 is connected to the water injection gap between the double-layer tube walls. The rotary drill bit 2001 is provided with a suction channel 2006, the suction hole is coaxially designed with the rotary drill bit 2001, the suction channel 2006 is a through hole, the opening of the suction hole is located on the working end face of the rotary drill bit 2001, and the suction channel 2006 is connected to the inner cavity of the inner blade tube 110. Water is injected through the water injection gap of the outer blade tube 120 with a double-layer tube wall, so that the water injection channel is isolated from the soft spring section of the inner blade tube 110, so as to avoid the liquid in the water injection gap from being sucked away during negative pressure suction, thereby improving the reliability and stability of water injection.

It should be further explained that the portion of the drill connecting tube 2002 extending out of the outer knife tube 120 is configured to be contracted from one end close to the outer knife tube 120 to the end away from the outer knife tube 120, which can reduce visual obstruction and improve the openness of the field of vision during surgery.

Embodiment 3

Please refer to Figures 12 to 17. The rotary drive handle of this embodiment is used to be sleeved on the knife tube assembly. The knife tube assembly of this embodiment is equivalent to the knife tube assembly of Example 1 or Example 2. The knife tube assembly includes an inner knife tube 110 and an outer knife tube 120 sleeved on the inner knife tube 110. The rotary drive handle includes a drive assembly, a limit assembly and an elastic member 3400. The elastic member 3400 is preferably a U-shaped elastic steel sheet. The drive assembly is used to drive the outer knife tube 120 to rotate relative to the inner knife tube 110. The drive assembly includes a drive sleeve 3210 and a hand wheel 3220. The drive sleeve 3210 is sleeved on the outer knife tube 120. When the drive sleeve 3210 rotates, the outer knife tube 120 will rotate accordingly. The hand wheel 3220 is sleeved on the drive sleeve 3210 and is used to drive the drive sleeve 3210 to rotate. The limit assembly is used to limit the rotation of the drive sleeve 3210 and provide a gear sense for the rotation of the outer knife tube 120. The limit assembly is sleeved on the knife tube assembly, and one end of the limit assembly is inserted into the hand wheel 3220 and clamped with the drive sleeve 3210 to limit the rotation of the drive sleeve 3210. The elastic member 3400 is installed between the drive sleeve 3210 and the hand wheel 3220 to control the rotation and reset of the hand wheel 3220. The proximal end of the outer knife tube 120 is located in the limit assembly, and the inner knife tube 110 passes through the limit assembly and is connected to the external power mechanism.

Specifically, please refer to Figure 17, the limiting member includes an adapter sleeve 3310, and a plurality of limiting grooves 3311 are circumferentially arranged at equal distances on the outer wall of one end of the adapter sleeve 3310, and the limiting grooves 3311 are arc-shaped grooves. Please refer to Figure 5, the drive sleeve 3210 has an elastic limiting cylinder 3211, and the limiting cylinder 3211 is adapted to the limiting groove 3311. The limiting assembly and the drive sleeve are connected by the cooperation of the limiting cylinder 3211 and the limiting groove 3311, and the limiting cylinder 3211 is pressed tightly in the limiting groove 3311 to achieve the locking state of the drive sleeve, prevent it from rotating, and then achieve the locking of the outer knife tube. Please refer to Figure 4. The handwheel 3220 has a limiting protrusion 3221 inside. When the driving sleeve 3210 is in a limiting locked state, the limiting cylinder 3211 is embedded in one of the limiting grooves 3311, and the limiting protrusion 221 contacts and abuts against the limiting cylinder 3211, that is, the limiting protrusion 221 tightly presses the limiting cylinder 3211 in the limiting groove 3311, preventing the driving sleeve 3210 from rotating, and further preventing the outer knife tube 120 from rotating.

Please refer to FIG5 , the outer wall of the driving sleeve 3210 is provided with an elastic member installation groove 3212 and a protrusion sliding groove 3213, preferably the elastic member installation groove 3212 and the protrusion sliding groove 3213 are opposite to each other, the elastic member 3400 is located in the elastic member installation groove 3212, and the limiting protrusion 3221 is slidably arranged in the protrusion sliding groove 3213. Specifically, four clamping blocks 3214 are arranged on the outer wall of the driving sleeve 3210, and the four clamping blocks 3214 are arranged in axial symmetry in pairs, wherein the elastic member installation groove 3212 is formed between two clamping blocks 3214 and the outer wall of the driving sleeve 3210, and the protrusion sliding groove 3213 is formed between the other two clamping blocks 3214 and the outer wall of the driving sleeve 3210. By turning the handwheel 3220, after turning it to a certain angle, the limiting protrusion 3221 disengages from the limiting cylinder 3211. When the limiting protrusion 3221 inside the handwheel 3220 contacts and abuts against the side wall of the protruding sliding groove 3213, the handwheel 3220 is continued to be turned, and the handwheel 3220 will drive the driving sleeve 3210 to rotate, thereby driving the outer knife tube 120 to rotate relative to the inner knife tube 110. After rotating to a suitable angle, the limiting cylinder 3211 is embedded in another limiting groove 3311, and the handwheel 3220 is released. The handwheel 3220 is rotated and reset to its original position under the action of the elastic member 3400. At this time, the limiting protrusion 3221 is used to press the limiting cylinder 3211 into another limiting groove 3311, so as to realize automatic locking of the driving sleeve 3210 and prevent it from rotating easily.

In order to make the connection between the driving sleeve 3210 and the knife tube assembly more firm and stable, a front limit sleeve 3510 is installed between the driving sleeve 3210 and the knife tube assembly, and the front limit sleeve 3510 is sleeved on the knife tube assembly. A bushing 3520 is sleeved on the front limit sleeve 3510, and the bushing 3520 is located inside the driving sleeve 3210. In order to make the connection between the limit assembly and the knife tube assembly more firm and stable, a rear limit sleeve 3530 is installed between the limit assembly and the knife tube assembly, and the rear limit sleeve 3530 is sleeved on the knife tube assembly. A fixing sleeve 3540 is installed between the rear limit sleeve 3530 and the front limit sleeve 3510, and the fixing sleeve 3540 is sleeved on the knife tube assembly. The fixing sleeve 3540 and the rear limiting sleeve 3530 also serve to limit the axial sliding of the adapter sleeve 3310 along the knife tube assembly. A sealing ring 3550 is sleeved on the fixing sleeve 3540 , and the sealing ring 3550 is located between the bushing 3520 and the adapter sleeve 3310 .

When the position of the planer window on the outer blade tube 120 needs to be adjusted, that is, when the outer blade tube 120 needs to be rotated relative to the inner blade tube 110, the hand wheel 3220 is turned. During the rotation process, the limiting protrusion 3221 gradually separates from the limiting cylinder 3211, and when the limiting protrusion 3221 inside the hand wheel 3220 contacts and abuts against the side wall of the protruding sliding groove 3213, the hand wheel 3220 is continued to be turned, and the hand wheel 3220 will drive the driving sleeve 3210 to rotate, thereby driving the outer blade tube 120 relative to the inner blade tube 110. The knife tube 110 rotates, and the driving sleeve 3210 rotates so that the limiting cylinder 3211 is disengaged from the limiting groove 3311. After rotating to a suitable angle, the limiting cylinder 3211 is embedded in another limiting groove 3311, and the hand wheel 3220 is released. The hand wheel 3220 rotates and resets to the original position under the action of the elastic member 3400. At this time, the limiting protrusion 3221 is used to press the limiting cylinder 3211 into another limiting groove 3311, so as to realize the automatic locking of the driving sleeve 3210 and prevent it from rotating easily. The rotary driving handle of this embodiment can realize the relative rotation of the outer knife tube 120 relative to the inner knife tube 110 by rotating the hand wheel 3220, and the multiple limiting grooves 3311 provided on the adapter sleeve 3310 can realize multiple rotation gears, which is convenient and quick to operate.

Continuing to refer to Figures 12 to 17, the planing tool of this embodiment includes the rotary drive handle and the knife tube assembly described in Example 1. The proximal end of the inner knife tube 110 in the knife tube assembly is connected to the power mechanism to realize the rotation control of the inner knife tube 110, and the rotation control of the outer knife tube 120 relative to the inner knife tube 110 can be realized by rotating the drive handle. The planing tool is easy to use and flexible.

It should be noted that the distal end in the above embodiment refers to the end of the blade head of the blade tube assembly used for planing bone tissue, and the proximal end refers to the end away from the distal end (handheld).

Embodiment 4

Referring to Figures 18 to 21, this embodiment discloses a tool head steering structure, which is used to be mounted on a tool tube assembly. The tool tube assembly of this embodiment is equivalent to the tool tube assembly of Example 1 or Example 2. The tool tube assembly includes an inner tool tube 110 and an outer tool tube 120 mounted on the inner tool tube 110. The tool head steering structure is used to drive the outer tool tube 120 to rotate relative to the inner tool tube 110.

The tool head steering structure includes a hand wheel 4010, a fixed sleeve 4020, a driving sleeve assembly and a steel ball 4030. The driving sleeve assembly is fixedly sleeved on the outer knife tube 120 and is used to drive the outer knife tube 120 to rotate relative to the inner knife tube 110, that is, the outer knife tube 120 will rotate when the driving sleeve assembly rotates. The hand wheel 4010 is connected to the driving sleeve assembly in a transmission manner, that is, the rotation of the hand wheel 4010 drives the driving sleeve assembly to rotate, and the hand wheel 4010 is sleeved on the fixed sleeve 4020. In order to better rotate the hand wheel 4010, an anti-skid groove is provided on the outer circumference of the hand wheel 4010. The steel ball 4030 is located inside the hand wheel 4010 and is used to limit the rotation of the driving sleeve assembly. The fixed sleeve 4020 is fixedly arranged, and the fixed sleeve 4020 is used to maintain the position of the steel ball 4030 and limit the sliding of the driving sleeve assembly along the axial direction. A spring 4040 is arranged between the hand wheel 4010 and the fixed sleeve 4020, and the spring 4040 is used to drive the hand wheel 4010 to slide and reset.

Specifically, the driving sleeve assembly includes an orientation sleeve 4051 and a retaining ring 4052. The retaining ring 4052 is fixedly sleeved on the orientation sleeve 4051. The rotation of the retaining ring 4052 will drive the orientation sleeve 4051 to rotate. The orientation sleeve 4051 is sleeved on the outer knife tube 120. The rotation of the orientation sleeve 4051 will drive the outer knife tube 120 to rotate, so that the rotation of the driving sleeve assembly drives the outer knife tube 120 to rotate. A plurality of arc grooves 4512 are evenly arranged along the circumferential direction on the outer wall of one end of the orientation sleeve 4051. Specifically, a mounting ring 4511 is provided on the outer wall of one end of the orientation sleeve 4051 for the fixed sleeve 4020. A plurality of arc grooves 4512 are evenly arranged on the mounting ring 4511 at an equal distance, and the arc grooves 4512 are adapted to the steel balls 4030. The hand wheel 4010 has a conical cavity 4011 inside. When the outer blade tube 120 is in a locked state, one end of the steel ball 4030 is located in one of the arc grooves 4512, and the inner wall of the conical cavity 4011 contacts and abuts against the steel ball 4030. The outer wall of the retaining ring 4052 has a clamping groove 4521. The hand wheel 4010 has a through hole 4012 at a position corresponding to the clamping groove 4521. A pin 4060 is inserted through the through hole 4012, and the pin 4060 is slidably arranged in the clamping groove 4521. The end of the retaining ring 4052 facing away from the blade head contacts and abuts against the end of the fixing sleeve 4020 close to the blade head, further limiting the axial sliding of the driving sleeve assembly. Slide the hand wheel 4010 in the direction away from the cutter head and rotate the hand wheel 4010, the hand wheel 4010 slides in the direction away from the cutter head, the pin shaft 4060 slides in the slot 4521, and the cavity wall of the conical cavity 4011 inside the hand wheel 4010 is separated from the steel ball 4030, that is, there is no pressure on the steel ball 4030, and the directional sleeve 4051 can rotate at this time; because one end of the pin shaft 4060 is set in the slot 4521, the rotation of the hand wheel 4010 will drive the retaining ring 4052 to rotate, and the retaining ring 4052 The rotation drives the directional sleeve 4051 to rotate, and the rotation of the directional sleeve 4051 drives the outer knife tube 120 to rotate. When the outer knife tube 120 rotates to a suitable position, the steel ball 4030 enters another arc groove 4512 and is released at this time. Under the action of the restoring force of the spring 4040, the handwheel 4010 slides toward the direction close to the knife head to reset, and the cavity wall of the conical cavity 4011 in the handwheel 4010 presses the steel ball 4030 again, thereby locking the directional sleeve 4051 and further locking the outer knife tube 120.

In order to prevent the directional sleeve 4051 in the driving sleeve assembly from sliding in the axial direction, a retaining ring 4021 is provided at one end of the fixed sleeve 4020 near the directional sleeve 4051, and the mounting ring 4511 is located inside the fixed sleeve 4020, and the retaining ring 4021 contacts and abuts against one end of the mounting ring 4511. An adapter sleeve 4070 is provided on the knife tube assembly, and the adapter sleeve 4070 is used to connect the external reduction box, and the reduction box here adopts the existing conventional reduction box. The proximal end of the outer knife tube 120 is located in the adapter sleeve 4070, and the proximal end of the inner knife tube 110 passes through the adapter sleeve 4070, and the fixed sleeve 4020 is arranged on the adapter sleeve 4070, and one end of the adapter sleeve 4070 contacts and abuts against the driving sleeve assembly. The axial position of the directional sleeve 4051 is fixed by the retaining ring 4021 and the adapter sleeve 4070 to prevent it from sliding in the axial direction during use. It should be noted that, in the present embodiment, the distal end refers to the cutter head end of the cutter tube assembly, and the proximal end refers to the end away from the cutter head.

The fixing sleeve 4020 has a steel ball hole 4022, and the steel ball 4030 is inserted into the steel ball hole 4022. The steel ball hole 4022 is provided to stabilize the steel ball 4030, to prevent the steel ball 4030 from sliding and dislocating, and to affect the rotation of the outer knife tube 120.

The cutter head steering structure of this embodiment requires that when the outer cutter tube 120 is required to rotate relative to the inner cutter tube 110, the hand wheel 4010 is slid in the direction away from the cutter head until it cannot slide. At this time, the pin shaft 4060 slides in the clamping groove 4521, the spring 4040 is compressed, and the cavity wall of the conical cavity 4011 inside the hand wheel 4010 is separated from the steel ball 4030, that is, there is no pressure on the steel ball 4030, and the directional sleeve 4051 can rotate. The hand wheel 4010 is rotated, and under the action of the pin shaft 4060, the hand wheel 4010 rotates to drive the retaining ring 4052 to rotate, and then drives the directional sleeve 4051 to rotate, and the directional sleeve 4051 rotates to drive the outer cutter tube 120 to rotate, so that the outer cutter tube 120 rotates relative to the inner cutter tube 110. During the rotation of the directional sleeve 4051, the steel ball 4030 is separated from the original arc groove 4512. When the outer knife tube 120 rotates to a suitable position, the steel ball 4030 enters the corresponding arc groove 4512. At this time, the hand wheel 4010 is released. Under the restoring force of the spring 4040, the hand wheel 4010 slides back to the direction close to the knife head. The cavity wall of the conical cavity 4011 in the hand wheel 4010 presses the steel ball 4030 again, so that the directional sleeve 4051 is locked, and then the outer knife tube 120 is locked. The operation is simple and fast, which improves the surgical efficiency to a certain extent and shortens the surgical time.

Please continue to refer to Figures 18 to 21. This embodiment provides a planing tool, including the tool head steering structure and the tool tube assembly of Example 1. The proximal end of the inner tool tube 110 in the tool tube assembly is connected to an external power mechanism to realize the rotation control of the inner tool tube 110, and the rotation control of the outer tool tube 120 relative to the inner tool tube 110 can be realized by sliding and rotating the hand wheel 4010. The planing tool has the advantages of convenient and flexible operation.

Embodiment 5

Please refer to Figures 22 to 30. This embodiment discloses a power handle, which is used to be sleeved on the knife tube assembly. The knife tube assembly of this embodiment is equivalent to the knife tube assembly of Example 1 or Example 2. The knife tube assembly of this application includes an inner knife tube 110 and an outer knife tube 120 sleeved on the inner knife tube 110. The power handle includes a driving assembly, a steel ball 5300, a fixing sleeve 5500 and a torsion spring 5400. The driving assembly is used to drive the outer knife tube 120 to rotate relative to the inner knife tube 110. The driving assembly includes a handwheel 5210, a stopper sleeve 5220 and a steering sleeve 5230. The steering sleeve 5230 is sleeved on the outer knife tube 120 to drive the outer knife tube 120 to rotate. The stopper sleeve 5220 is sleeved on the steering sleeve 5230 to drive the steering sleeve 5230 to rotate. The handwheel 5210 is sleeved on the stopper sleeve 5220 to drive the stopper sleeve 5220 to rotate. The steel ball 5300 is used to limit the rotation of the steering sleeve 5230. The torsion spring 5400 is used to drive the hand wheel 5210 to reset and rotate, and the torsion spring 5400 is located between the stop sleeve 5220 and the hand wheel 5210. The fixed sleeve 5500 is used to maintain the position of the steel ball 5300 and limit the steering sleeve 5230 from sliding along the axial direction, and the fixed sleeve 5500 is fixedly arranged inside the hand wheel 5210.

Specifically, please refer to Figures 27 and 28. A plurality of steel ball grooves 5231 are evenly distributed in an annular direction on the outer wall of the steering sleeve 5230. A steel ball clearance groove 211 is provided on the inner wall of the hand wheel 5210. Both the steel ball grooves 5231 and the steel ball clearance groove 211 are adapted to the steel ball 5300. The setting of the plurality of steel ball grooves 5231 can realize the setting of multiple gears for the rotation of the outer knife tube 120. A ball pressing protrusion 5212 is provided on the inner wall of the hand wheel 5210 for pressing the steel ball 5300. The ball pressing protrusion 5212 is located beside the steel ball clearance groove 211. When the outer knife tube 120 is in a locked state and cannot rotate, the ball pressing protrusion 5212 presses the steel ball 5300 into a steel ball groove 5231.

Please refer to FIG. 4 , the stopper sleeve 5220 includes a baffle plate 5221 and a connecting pipe 5222 which are coaxially fixedly connected. The baffle plate 5221 has a limiting notch 52211. The inner wall of the hand wheel 5210 has a limiting protrusion 5213. The limiting protrusion 5213 is slidably arranged in the limiting notch 52211. According to the above technical solution, when the hand wheel 5210 is rotated to a certain angle, that is, when the limiting protrusion 5213 is rotated to abut against the inner wall of the limiting notch 52211, the hand wheel 5210 will drive the stopper sleeve 5220 to rotate, thereby driving the steering sleeve 5230 to rotate. The connecting pipe 5222 is located in the hand wheel 5210, and the torsion spring 5400 is sleeved on the connecting pipe 5222. The connecting pipe 5222 has a limiting groove 5223. The steering sleeve 5230 is provided with a limiting column corresponding to the position of the limiting groove 5223, and the limiting column is inserted into the limiting groove 5223. The connection between the stopper sleeve 5220 and the steering sleeve 5230 is achieved by inserting the stopper post into the stopper slot 5223 , so that the stopper sleeve 5220 can drive the steering sleeve 5230 to rotate when rotating.

Please refer to Figure 28. One end of the fixed sleeve 5500 is sleeved on one end of the steering sleeve 5230 having the steel ball groove 5231. Specifically, the steering sleeve 5230 is provided with a slotted ring 5232. The steel ball groove 5231 is provided on the slotted ring 5232. The slotted ring 5232 is located in the fixed sleeve 5500. A limiting ring 5520 is provided inside one end of the fixed sleeve 5500. One end of the limiting ring 5520 contacts and abuts against one end of the slotted ring 5232. The limiting ring 5520 inside the fixed sleeve 5500 and the slotted ring 5232 on the steering sleeve 5230 contact and abut against each other, so that the steering sleeve 5230 is prevented from sliding in the axial direction, so that the rotational movement of the outer knife tube 120 relative to the inner knife tube 110 is more stable. The fixed sleeve 5500 has a steel ball hole 5510, and the steel ball 5300 is inserted into the steel ball hole 5510. The steel ball hole 5510 on the fixing sleeve 5500 is provided to stabilize the steel ball 5300 and prevent the steel ball 5300 from sliding and being misplaced, thereby affecting the rotation of the outer knife tube 120 .

The power handle of this embodiment further includes a reducer 5600, the proximal end of the inner blade tube 110 is connected to the reducer 5600, and the proximal end of the outer blade tube 120 is located outside the reducer 5600. The proximal end here refers to the end away from the blade head for planing bone tissue. The reducer 5600 of this embodiment can be a conventional reducer.

The power handle of this embodiment further includes a front shell 5710 and a rear shell 5720 , which are connected to form a shell of the power handle, and the shell is connected to both the hand wheel 5210 and the fixing sleeve 5500 .

The hollow interior of the inner blade tube 110 constitutes a liquid suction channel 5800, and the gap between the inner blade tube 110 and the outer blade tube 120 constitutes a water injection channel 5900. Water can be injected into the cutter head through the water injection channel 5900 and flow out of the cutter head, which is used for cooling and flushing the cutter head planing operation part of the cutter head assembly, and waste liquid can be extracted from the cutter head through the suction channel 5800.

When it is necessary to rotate the outer knife tube 120, turn the handwheel 5210, and the handwheel 5210 rotates until a part of the steel ball 5300 is embedded in the steel ball yielding groove 211, and the handwheel 5210 continues to be turned, and the limiting protrusion 5213 slides to abut against the inner wall of the limiting notch 52211, and the handwheel 5210 will drive the stopper sleeve 5220 to rotate, and the stopper sleeve 5220 drives the steering sleeve 5230 to rotate, and the steering sleeve 5230 drives the outer knife tube 120 to rotate. When the steering sleeve 5230 rotates until the steel ball 5300 jumps into another steel ball groove 5231, release the handwheel 5210, and the handwheel 5210 rotates in the opposite direction and resets under the action of the torque of the torsion spring 5400, and the ball pressing protrusion reset to the inner wall of the handwheel 5210 presses the steel ball 5300 into the other steel ball groove 5231 into which it jumps, thereby locking the outer knife tube 120, and the fixed sleeve remains stationary during the entire process of turning the handwheel.

The fixed sleeve in the power handle of this embodiment can maintain the position of the steel ball 5300 through the steel ball hole 5510 to prevent the steel ball 5300 from sliding freely in the hand wheel 5210; in the process of turning the hand wheel 5210 to drive the steering sleeve 5230 to rotate, a rotational damping sense is provided, and the gear sense of the rotation of the outer knife tube 120 is realized by cooperating with the steel ball groove 5231 on the steering sleeve 5230; the contact and resistance between the limiting ring 5520 inside the fixed sleeve 5500 and the slotted ring 5232 on the steering sleeve 5230 can prevent the steering sleeve 5230 from sliding axially, so that the rotational movement of the outer knife tube 120 relative to the inner knife tube 110 is more stable. When the planer window position needs to be adjusted, rotating the handwheel 5210 can drive the outer knife tube 120 to rotate relative to the inner knife tube 110, which is very convenient to operate. When the outer knife tube 120 is in a locked state, the ball pressing protrusion 5212 presses the steel ball 5300 tightly against the steel ball groove 5231, so that the outer knife tube 120 cannot be easily and directly rotated, and it is safe and reliable to use.

Referring to Figures 29 and 30, this embodiment provides a planing tool, including the power handle and the blade tube assembly of Example 1, and also including a suction joint 5810, a suction tube 5820, a water injection joint 910 and a water injection tube 5920. The suction joint 5810 is connected to the hollow interior of the inner blade tube 110 through the suction tube 5820, and the water injection joint 910 is connected to the water injection channel 5900 through the water injection tube 5920. An adapter sleeve 5610 is sleeved at the proximal end of the blade tube assembly, one end of the adapter sleeve 5610 is inserted into the fixed sleeve 5500, and a sealing ring 5620 is arranged in the end of the adapter sleeve 5610 close to the steel ball 5300, and the sealing ring 5620 is sleeved on the outer blade tube 120, and the end of the adapter sleeve 5610 away from the steel ball 5300 has a water injection hole, and the water injection hole is connected to the water injection channel. A right angle joint 5930 is connected to the water injection hole, and the right angle joint 5930 is connected to the water injection pipe 5920. The proximal end of the outer knife tube 120 is located in the adapter sleeve 5610, and the proximal end of the inner knife tube 110 passes through the adapter sleeve 5610.

In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims (19)

A planing tool is characterized in that it comprises a knife tube assembly, wherein the knife tube assembly comprises an inner knife tube and an outer knife tube, and the inner knife tube can rotate relative to the outer knife tube. The planing tool according to claim 1, characterized in that it also includes a housing, a power component, and a negative pressure suction component; The power assembly is arranged in the housing, one end of the knife tube assembly extends into the housing, the outer knife tube is fixedly connected to the housing, and the inner knife tube is drivingly connected to the output end of the power assembly; One end of the negative pressure suction component extends into the interior of the shell and communicates with the cavity of the inner knife tube, and the other end of the negative pressure suction component extends from the shell. The planing tool according to claim 2 is characterized in that it also includes a water injection assembly, wherein the end of the blade tube assembly away from the shell has a water outlet, a water injection gap is formed between the inner wall of the outer blade tube and the outer wall of the inner blade tube, the water injection gap is connected to the water outlet, one end of the water injection assembly extends into the shell and is connected to the water injection gap between the outer blade tube and the inner blade tube, and the other end of the water injection assembly extends from the shell. The planing tool according to claim 2 is characterized in that the power assembly comprises a mounting base, a motor and a gear speed change structure, the mounting base is fixedly mounted in the housing, the motor is placed on the horizontal mounting portion of the mounting base, the output end of the motor is in contact with the vertical mounting portion of the mounting base, and the output shaft of the motor passes through the vertical mounting portion of the mounting base; The gear speed change structure includes a driving gear, a double transmission gear and a driven gear. The driving gear is coaxially fixedly connected to the output shaft of the motor. The double transmission gear is rotatably installed on the vertical mounting portion of the mounting base through a rotating shaft. The driven gear is transmission-connected to the inner knife tube. The double transmission gear transmission-connects the driving gear and the driven gear. The planing tool according to claim 4 is characterized in that the negative pressure suction assembly comprises a negative pressure suction pipe and a regulating valve, one end of the inner blade tube extending into the shell extends into the lateral mounting portion of the mounting base, one end of the negative pressure suction pipe extends into the lateral mounting portion of the mounting base, and the other end of the negative pressure suction pipe extends out of the shell; The regulating valve is rotatably mounted on the transverse mounting portion of the mounting base, and is used to connect or disconnect the negative pressure suction pipe and the inner knife pipe, and the regulating portion of the regulating valve is located outside the housing; A sealing ring is respectively provided at the connection between the inner knife tube and the transverse mounting portion of the mounting base, and at the rotation connection between the regulating valve and the transverse mounting portion of the mounting base. The planing tool according to claim 5 is characterized in that a limiting tube is sleeved on the negative pressure suction tube, one end of the limiting tube abuts against the rear end surface of the transverse mounting portion of the mounting base, and the other end of the limiting tube abuts against the rib plate in the shell. The planing tool according to claim 4 is characterized in that the contact surface between the transverse mounting portion of the mounting base and the motor is a concave arc surface. The planing tool according to claim 4, characterized in that the outer tool tube is fixedly connected to the front end of the transverse mounting portion of the mounting base through a fixed connecting sleeve; The water injection assembly includes a water injection pipe, one end of which is located inside the shell, and the other end of which extends out of the shell. The fixed connection sleeve is provided with a water injection connection hole, and one end of the water injection pipe located inside the shell is connected to the water injection connection hole, and the water injection connection hole is connected to the water injection gap between the outer knife tube and the inner knife tube; A sealing ring and a bearing are arranged between the end of the fixed connection sleeve close to the mounting base and the inner knife tube. A drill bit structure for planing, characterized in that one end of the inner cutter tube is coaxially fixedly connected with a drill bit, the drill bit rotates relative to the outer cutter tube, and the internal channel of the drill bit is connected with the internal pipeline of the inner cutter tube; The drill bit is provided with radial suction channels, the radial suction channels are evenly distributed along the circumference of the drill bit, and any of the radial suction channels is connected to the internal channel of the drill bit; A planing drill bit assembly, characterized in that it comprises a cutter tube assembly, wherein the cutter tube assembly comprises an inner cutter tube and an outer cutter tube, and the inner cutter tube can rotate relative to the outer cutter tube; The outer knife tube comprises a double-layer tube wall, a water injection gap is formed between the double-layer tube walls of the outer knife tube, and a water outlet hole is provided on the drill bit connecting tube, and the water outlet hole is communicated with the water injection gap between the double-layer tube walls; The rotary drill bit is provided with a suction hole, and the suction hole is communicated with the inner cavity of the inner knife tube. The planing drill bit assembly according to claim 10 is characterized in that it also includes a rotating drill bit, a drill bit connecting tube and a power adapter sleeve, one end of the drill bit connecting tube extends into the outer cutter tube and is fixedly connected to the outer cutter tube, one end of the rotating drill bit passes through the inside of the drill bit connecting tube and extends into the inner cutter tube, the rotating drill bit is coaxially fixedly connected to the inner cutter tube through the power adapter sleeve, and the rotating drill bit is rotatably matched with the drill bit connecting tube; The power adapter sleeve is abutted against one end of the drill bit connecting tube for limiting position, and the other end of the rotary drill bit has an abutting surface abutted against the other end of the drill bit connecting tube for limiting position. A planer head for a planer tool, characterized in that an outer planer window is provided at one end of the outer tool tube, and an outer planer tooth is provided on the outer planer window, and the outer planer tooth includes a plurality of continuous tooth portions, and the tooth portion of any of the outer planer teeth is inclined outwards; An inner planing window is arranged at one end of the inner knife tube, and an inner planing tooth is arranged on the inner planing window. The inner planing tooth comprises a plurality of continuous tooth portions, and the tooth portion of any inner planing tooth is inclined inwardly. A planer head for a planer tool, characterized in that an outer planer window is provided at one end of the outer blade tube, and a continuous and smooth blade portion is formed around the opening of the outer planer window; An inner planing window is arranged at one end of the inner knife tube, and two axially opposite side surfaces of the inner planing window are respectively provided with a tooth portion, the two tooth portions are arranged opposite to each other, and a smooth blade portion is formed around the opening of the inner planing window. The rotary drive handle is characterized in that it is used to be sleeved on a knife tube assembly, wherein the knife tube assembly includes an inner knife tube and an outer knife tube sleeved on the inner knife tube, and includes: A driving assembly, used for driving the outer knife tube to rotate relative to the inner knife tube, the driving assembly comprising a driving sleeve and a hand wheel, the driving sleeve is sleeved on the outer knife tube and used for driving the outer knife tube to rotate, the hand wheel is sleeved on the driving sleeve and used for driving the driving sleeve to rotate; A limit assembly is used to limit the rotation of the drive sleeve and provide a gear sense for the rotation of the outer knife tube. The limit assembly is fixedly sleeved on the knife tube assembly, and one end of the limit assembly is inserted into the hand wheel and clamped with the drive sleeve; The elastic member is used to drive the hand wheel to rotate and reset, and is installed between the driving sleeve and the hand wheel. A planing tool head assembly according to claim 14, characterized in that the limiting member comprises an adapter sleeve, a plurality of limiting grooves are circumferentially and equidistantly arranged on the outer wall of the adapter sleeve, the driving sleeve has an elastic limiting cylinder, the limiting cylinder is adapted to the limiting groove, the hand wheel has a limiting protrusion inside, and when the driving sleeve is in a limiting locking state, the limiting cylinder is embedded in one of the limiting grooves, and the limiting protrusion contacts and abuts against the limiting cylinder; The outer wall of the driving sleeve is provided with an elastic member installation groove and a protrusion sliding groove, the elastic member is located in the elastic member installation groove, and the limiting protrusion is slidably arranged in the protrusion sliding groove; A front limit sleeve is installed between the driving sleeve and the knife tube assembly, the front limit sleeve is arranged on the knife tube assembly, the bushing is located in the driving sleeve, a rear limit sleeve is installed between the limit assembly and the knife tube assembly, the rear limit sleeve is arranged on the knife tube assembly, a fixing sleeve is installed between the rear limit sleeve and the front limit sleeve, and the fixing sleeve is arranged on the knife tube assembly; The proximal end of the outer knife tube is located in the limiting assembly, and the inner knife tube passes through the limiting assembly and is connected to the external power mechanism. A cutter head steering structure, the cutter head steering structure is used to be sleeved on a cutter tube assembly, the cutter tube assembly includes an inner cutter tube and an outer cutter tube sleeved on the inner cutter tube, characterized in that the cutter head steering structure includes a hand wheel, a fixed sleeve, a drive sleeve assembly and a steel ball, the drive sleeve assembly is fixedly sleeved on the outer cutter tube, and is used to drive the outer cutter tube to rotate relative to the inner cutter tube; The hand wheel is in transmission connection with the driving sleeve assembly, and the rotation of the hand wheel drives the driving sleeve assembly to rotate, and the hand wheel is sleeved on the fixed sleeve; The steel ball is located inside the handwheel and is used to limit the rotation of the drive sleeve assembly; The fixing sleeve is fixedly arranged, and is used to maintain the position of the steel ball and limit the axial sliding of the driving sleeve assembly; a spring is arranged between the hand wheel and the fixing sleeve, and is used to drive the hand wheel to slide and reset. The cutter head steering structure according to claim 16 is characterized in that the driving sleeve assembly comprises an orientation sleeve and a retaining ring, the retaining ring is fixedly sleeved on the orientation sleeve, the retaining ring rotates to drive the orientation sleeve to rotate, the orientation sleeve is sleeved on the outer cutter tube, and the orientation sleeve rotates to drive the outer cutter tube to rotate; The outer wall of one end of the directional sleeve is evenly provided with a plurality of arc grooves along the circumferential direction, and the hand wheel has a conical cavity inside. When the outer knife tube is in a locked state, one end of the steel ball is located in one of the arc grooves, and the inner wall of the conical cavity contacts and abuts against the steel ball. A mounting ring is provided on the outer wall of one end of the directional sleeve, a plurality of arc-shaped grooves are arranged on the mounting ring, a clamping ring is provided on one end of the directional sleeve close to the directional sleeve, the mounting ring is located inside the fixing sleeve, and the clamping ring contacts and abuts against one end of the mounting ring; The outer wall of the retaining ring is provided with a slot, the hand wheel is provided with a through hole at a position corresponding to the slot, a pin is passed through the through hole, and the pin is slidably arranged in the slot; The fixing sleeve is provided with a steel ball hole, and the steel ball is inserted into the steel ball hole; The knife tube assembly is provided with an adapter sleeve, the proximal end of the outer knife tube is located in the adapter sleeve, the proximal end of the inner knife tube passes through the adapter sleeve, the fixed sleeve is arranged on the adapter sleeve, and one end of the adapter sleeve contacts and abuts against the driving sleeve assembly. The power handle is characterized in that the power handle is sleeved on the knife tube assembly, and the knife tube assembly includes an inner knife tube and an outer knife tube sleeved on the inner knife tube, including: A driving assembly, used for driving the outer knife tube to rotate relative to the inner knife tube, the driving assembly comprises a hand wheel, a stopper sleeve and a steering sleeve, the steering sleeve is sleeved on the outer knife tube to drive the outer knife tube to rotate, the stopper sleeve is sleeved on the steering sleeve to drive the steering sleeve to rotate, and the hand wheel is sleeved on the stopper sleeve to drive the stopper sleeve to rotate; Steel ball, used to limit the rotation of the steering sleeve; A torsion spring is used to drive the hand wheel to reset and rotate, and the torsion spring is located between the stop sleeve and the hand wheel; The fixed sleeve is used to maintain the position of the steel ball and limit the steering sleeve from sliding along the axial direction. The fixed sleeve is fixedly arranged inside the hand wheel. The power handle according to claim 18 is characterized in that a plurality of steel ball grooves are evenly distributed in an annular direction on the outer wall of the steering sleeve, and a steel ball clearance groove is provided on the inner wall of the hand wheel, and both the steel ball groove and the steel ball clearance groove are adapted to the steel ball; A ball pressing protrusion is arranged on the inner wall of the hand wheel for pressing the steel ball, and the ball pressing protrusion is located beside the steel ball yielding groove; The stopper sleeve comprises a stopper plate and a connecting pipe which are coaxially fixedly connected, the stopper plate has a limiting notch, the inner wall of the hand wheel has a limiting protrusion, the limiting protrusion is slidably arranged in the limiting notch, the connecting pipe is located in the hand wheel, and the torsion spring is sleeved on the connecting pipe; The connecting pipe has a limiting groove, and the steering sleeve is provided with a limiting column at a position corresponding to the limiting groove, and the limiting column is inserted into the limiting groove; The steering sleeve is provided with a slotted ring, the steel ball groove is provided on the slotted ring, the slotted ring is located in the fixed sleeve, one end of the fixed sleeve has a limiting ring inside, one end of the limiting ring contacts and abuts against one end of the slotted ring; The fixed sleeve is provided with a steel ball hole, and the steel ball is inserted into the steel ball hole. The power handle also includes a reducer. The proximal end of the inner knife tube is connected to the reducer, and the proximal end of the outer knife tube is located outside the reducer. The hollow interior of the inner knife tube constitutes a liquid suction channel, and the gap between the inner knife tube and the outer knife tube constitutes a water injection channel.