CN205866801U - Sealed driving medical handle - Google Patents

Abstract

The utility model discloses a seal-driven medical handle, which comprises a handle housing, a magnetic power output assembly and a magnetic power input assembly arranged in parallel in the axial direction in the handle housing, and the magnetic power output assembly is used for joint transmission with a tool. , the magnetic power input assembly is matched with the power device transmission and is used to drive the magnetic power output assembly to rotate through magnetic force, and a spacer for forming an axial static seal is arranged between the magnetic power output assembly and the magnetic power input assembly; avoiding the handle The shell is prone to micro-leakage problems due to the poor sealing of the dynamic seal, which greatly improves the service life of the power handle and the safety and stability of clinical use; and transmits power through magnetic coupling to stably drive the tool to rotate, with high transmission efficiency ;The tool is installed behind the handle, which has strong axial and radial load resistance, and has strong bending moment resistance, which avoids the problem of unstable power transmission or large loss, and ensures the efficiency of surgery.

Description

Seal-actuated medical handles

technical field

The utility model relates to the field of medical instruments, in particular to a seal-driven medical handle.

Background technique

In the operation of grinding and excision of bone tissue or soft tissue, a power handle and a high-speed rotating tool installed on the power handle are usually used for grinding, drilling, planing, etc. The power handle is equipped with a micro-motor and transmits power to the On the knife, in order to clean up the blood and saline that obstruct the view in time during the operation, a suction channel for sucking blood and saline is usually provided on the power handle, and a water injection channel for perfusing saline can also be provided if necessary. aisle. The suction channel communicates with the inner cavity of the front end of the power handle and controls the suction flow through a regulating valve. In order to prevent the blood and saline from soaking the reducer and micro-motor in the power handle, a seal is usually arranged on the outer circle of the transmission part to form a shaft. The dynamic seal prevents the liquid in the inner cavity of the front end of the power handle from flowing into the inner cavity of the rear end of the power handle. However, since the seal usually adopts a rubber ring seal or a ceramic seal and is a dynamic seal, the rotation of the transmission part makes the transmission part and the seal and /or the relative rotation between the shell of the power handle and the seal, there is always micro leakage, which makes the service life of the motor short, and the seal is often in contact with blood and saline, and the power handle is easy to be easily damaged on the sealing surface after high temperature sterilization. The formation of sodium chloride crystals will easily cause seal failure after rotation, causing the reducer and motor bearings to rust and stick, resulting in high maintenance costs and affecting the stability of clinical use.

Utility model content

In view of this, the purpose of this utility model is to overcome the defects in the prior art, and to provide a sealed drive medical handle, which transmits power through magnetic coupling and stably drives the tool to rotate, with high transmission efficiency, and is formed in the inner cavity of the power handle. Effective axial sealing can avoid leakage problems, prevent the reducer and micro-motor in the power handle from being corroded, and greatly improve the service life of the power handle and the stability of clinical use.

The sealed driving medical handle of the present utility model comprises a handle housing, a magnetic power output assembly and a magnetic power input assembly arranged in parallel in the handle housing along the axial direction, the magnetic power output assembly is used for joint transmission with a tool, and the The magnetic power input assembly cooperates with the power device for transmission and is used to drive the magnetic power output assembly to rotate through magnetic force, and an isolator for forming an axial static seal is arranged between the magnetic power output assembly and the magnetic power input assembly.

Further, the magnetic power input assembly drives the magnetic power output assembly to rotate through axial magnetic force; the spacer is detachably fixedly connected to the handle housing and the front end protrudes axially forward to form a support shaft, and the magnetic power output assembly The outer sleeve is rotated on the support shaft in an axial limiting manner.

Further, the magnetic power output assembly includes a power output part that is coupled with the cutter and a driven magnet fixed to the power output part. The power output part is sheathed on the support shaft and its axial rear end surface is separated from it by a plane bearing. The axial front end face of the component is rotationally fitted.

Further, the plane bearing includes an annular cage and a plurality of balls distributed on the annular cage in the circumferential direction, the annular cage is covered with the support shaft and is provided with installation holes for installing the balls in the axial direction; the diameter of the balls is greater than the axial length of the mounting hole.

Further, the inner circle of the annular cage extends axially forward to form a support sleeve, and the support sleeve is radially supported between the power output member and the support shaft in a manner of sliding in the circumferential direction.

Further, the installation hole is set at the connection between the annular cage and the support sleeve, the diameter of the rear port of the installation hole is smaller than the diameter of the ball, and the outer circle of the rear end of the support sleeve is radially concaved to form a front port of the installation hole. A connected semi-arc groove, the ball fits into the installation hole through the front port of the installation hole and the semi-arc groove; an arc-shaped ring groove is arranged in the middle of the inner circle of the installation hole, and the arc-shaped ring groove The curvature matches the curvature of the outer surface of the ball.

Further, the front end of the support shaft is provided with a limit ring, and the axial rear end face of the limit ring is used for positioning the power output member in the axial direction; the power output member includes a power output ring and a power output ring. The driving fork is formed by protruding from the front end surface of the front end in the axial direction. The driving fork is multiple and distributed along the circumferential direction; the seal-driven medical handle also includes a positioning sleeve for axially positioning the tool. The positioning The inner sleeve of the sleeve is fixed in the inner circle formed by a plurality of driving shift forks in such a way that the axial rear end face is under pressure on the power output ring.

Further, a speed reducer for deceleration is also arranged between the magnetic power input assembly and the power device, the magnetic power input assembly includes a power input member with a circumferential transmission sleeve and an output shaft of the reducer and an active magnet fixed to the power input member, The active magnet and the driven magnet are arranged to attract each other in an axially opposite manner; an axial gap is set between the active magnet, the driven magnet and the spacer.

Further, the active magnet and the driven magnet are both arc-shaped magnetic tiles, and the arc-shaped magnetic tiles are multiple and evenly distributed along the circumferential direction, and the axial ends of two adjacent arc-shaped magnetic tiles in the circumferential direction are Alien poles.

Further, the spacer is a spacer sleeve with a closed front end, and the outer circle of the spacer sleeve forms an annular step I and overlaps with the ring-shaped step II arranged on the inner circle of the handle housing to realize the axial limit of the spacer sleeve. An O-ring sealing ring is provided on the axially opposite surfaces of the step I and the annular step II.

The beneficial effects of the utility model are: a sealed drive medical handle disclosed by the utility model, the power of the power device is input through the magnetic power output and output assembly, and the magnetic power output and input assembly drives the magnetic power output assembly to rotate through magnetic force, thereby driving When the tool rotates, a spacer that forms a static seal is set between the magnetic power output and output components and the magnetic power output component to avoid the problem of micro-leakage of the handle shell due to the poor sealing of the dynamic seal, and to avoid the reducer in the power handle And the micro motor is corroded, which greatly improves the service life of the power handle and the safety and stability of clinical use; and transmits power through magnetic coupling, stably drives the tool to rotate, and has high transmission efficiency; the tool is installed behind the handle, axial and radial It has strong anti-load ability and strong anti-bending moment ability, avoiding the problem of unstable power transmission or large loss, and ensuring the efficiency of surgery.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is a structural schematic diagram of a sealed drive type medical handle of the present invention;

Fig. 2 is a schematic structural view of the axial seal in the utility model;

Fig. 3 is a structural schematic diagram of an annular cage and a support sleeve in the utility model;

Fig. 4 is a structural schematic diagram of the rear end face of the power output member in the utility model;

Fig. 5 is a structural schematic diagram of the arc-shaped magnetic tile in the utility model.

detailed description

Fig. 1 is a structural schematic diagram of a seal-driven medical handle of the present utility model, Fig. 2 is a structural schematic diagram of an axial seal in the present utility model, Fig. 3 is a structural schematic diagram of an annular cage and a support sleeve in the present utility model, and Fig. 4 is a schematic diagram of the utility model The structure schematic diagram of the rear end surface of the power output part in the utility model, Fig. 5 is the structure schematic diagram of the arc-shaped magnetic tile in the utility model, as shown in the figure, the sealed drive type medical handle in this embodiment; includes the handle housing 1, A magnetic power output assembly and a magnetic power input assembly arranged side by side in the handle housing 1 in the axial direction, the magnetic power output assembly is used to engage with the tool for transmission, and the magnetic power input assembly is matched with the power device for transmission. When the power device When the output power drives the magnetic power input assembly to rotate, the magnetic power output assembly is driven to rotate through the magnetic force generated between the magnetic power input assembly and the magnetic power output assembly. Form the spacer 2 of the axial static seal; the transmission of the magnetic power output assembly and the tool, and the magnetic power input assembly and the power device can be used to realize all transmission structures of the utility model in the prior art, and will not be described here Repeat it again; and the spacer 2 can be a blocking piece made of non-magnetic material, and the outer circle of the blocking piece can be provided with a sealing ring to form an axial static seal. The axial static seal means that the spacer 2 seals the handle housing along the The axial seal is divided into two chambers, the power is transmitted through magnetic coupling, and the tool is stably driven to rotate. The spacer 2 does not rotate with the drive of the power input or output assembly, which avoids the conventional dynamic seal due to the rotation of the power input or output assembly. It is not strict and prone to micro-leakage problems, thereby preventing the reducer and micro-motor in the power handle from being corroded, greatly improving the service life of the power handle and the safety and stability of clinical use, and the transmission efficiency is high.

In this embodiment, the magnetic power input assembly drives the magnetic power output assembly to rotate through axial magnetic force; the spacer 2 is detachably fixedly connected to the handle housing 1, and the front end of the spacer 2 protrudes axially forward to form a support Shaft 3, the magnetic power output assembly is rotated and sleeved on the support shaft 3 in an axially limited manner; the front end means that the end where the tool is installed in the axial direction of the handle housing is the front end, and vice versa is the rear end; through the setting of the support shaft 3, It is beneficial to ensure the coaxiality between the magnetic power output assembly and the magnetic power input assembly, and to ensure high-efficiency power transmission. Since the magnetic power input assembly is driven by axial magnetic force to rotate the magnetic power output assembly, the use of the support shaft 3 can ensure magnetic The force of the power output assembly is stable, and the shaking of the magnetic power output assembly is avoided.

In this embodiment, the magnetic power output assembly includes a power output member 4 that cooperates with the tool in transmission and a driven magnet 5 fixed to the power output member 4. The power output member 4 is sheathed on the support shaft 3, and the power output The axial rear end surface of the member 4 rotates with the axial front end surface of the spacer 2 through a plane bearing; the power output member 4 can be an annular or disc-shaped structure that is sheathed on the support shaft 3, and the power output member 4 is provided with The combination part that engages with the tool transmission, such as circumferential teeth or circumferential grooves, etc. Through the arrangement of plane bearings, it is ensured that the power output member 4 can withstand a relatively large axial load, ensuring the stability of the transmission, and because the displacement direction of the power output member 4 can only be axial movement, which is the same as the direction of the coupling magnetic force, the active magnet 16 There is no relative movement along the direction perpendicular to the magnetic force between the passive magnet 5, effectively avoiding the additional torque with adverse effects caused by the relative movement of the active magnet 16 and the passive magnet 5 along the direction perpendicular to the magnetic force, even when the power output 4 When a small movement occurs in the axial direction, it will not affect the torque transmission between the magnetic power input assembly and the magnetic power output assembly through the axial magnetic force, especially after long-term use, the plane bearing presses the front end of the spacer 2 to form an annular pressure groove , the annular pressure groove has a radial limit effect on the plane bearing, ensuring stable and efficient power torque transmission.

In this embodiment, the plane bearing includes an annular cage 6 and a plurality of balls 7 distributed on the annular cage 6 in the circumferential direction. The mounting hole 8 of 7; the diameter of the ball 7 is greater than the axial length of the mounting hole 8; there are multiple balls 7 in this embodiment, which can be steel balls, and the diameter of the ball 7 is greater than the axial length of the mounting hole 8 to ensure power output The rear end surface of piece 4 and the front end surface of spacer 2 are rolling friction, which greatly reduces frictional heat generation, especially when the axial load on power output piece 4 is relatively large, reducing friction reduces power loss and improves power output. output efficiency.

In this embodiment, the inner circle of the annular cage 6 extends axially forward to form a support sleeve 9, and the support sleeve 9 is radially supported on the connection between the power output member 4 and the support shaft 3 in a manner of sliding in the circumferential direction. Between; through the setting of the support sleeve 9, the support sleeve 9 is used as a special sliding bearing of the power output part 4, and cooperates with the plane bearing to form a composite centripetal thrust bearing, so that the seal-driven medical handle can move axially and radially It bears a large load, has low friction, high power transmission efficiency, stable transmission, avoids locking, and has a simple and compact structure.

In this embodiment, the mounting hole 8 is set at the joint between the annular cage 6 and the support sleeve 9, the diameter of the rear port of the mounting hole 8 is smaller than the diameter of the ball 7, and the outer circle of the rear end of the support sleeve 9 is radially The inner concave forms a semi-arc groove 10 communicated with the front port of the mounting hole 8, and the ball 7 fits into the mounting hole 8 through the front port and the semi-arc groove 10 to facilitate the installation of the ball 7; An arc-shaped ring groove 11 is arranged in the middle of the inner circle, and the arc-shaped ring groove 11 matches the arc of the outer surface of the ball 7, effectively preventing the ball 7 from falling off from the mounting hole 8 during installation, and improving the installation efficiency.

In this embodiment, the front end of the support shaft 3 is fixedly covered with a limit ring 12, and the axial rear end surface of the limit ring 12 is used to position the power output member 4 in the axial direction; the power output member 4 includes The power take-off ring and the driving fork 13 protruding from the front end of the power take-off ring in the axial direction, the driving fork 13 is multiple and distributed along the circumferential direction; Axially positioned positioning sleeve 14, the positioning sleeve 14 is fixed in the inner circle formed by a plurality of driving shift forks 13 in such a way that the axial rear end face is pressed against the power output ring; it is formed and driven by the rear end of the tool The shifting fork 13 is engaged with the shifting fork groove, and the driving shifting fork 13 is inserted into the shifting fork groove for circumferential transmission. It is easy to install and has a stable structure. When the tool is installed, the positioning sleeve 14 is used for axial positioning, and the axial load of the tool passes through The positioning sleeve 14 is transmitted to the power output ring to ensure that the load force is transmitted axially and evenly distributed along the circumferential direction, avoiding the problem of additional torque easily generated by driving the shift fork 13 to transmit the axial load.

In this embodiment, a speed reducer 19 for deceleration is also provided between the magnetic power input assembly and the power device. The magnetic power input assembly includes a power input member 15 that is circumferentially driven outside the output shaft of the speed reducer 19 and fixed on The active magnet 16 of the power input part 15, the active magnet 16 and the driven magnet 5 are arranged to attract each other in an axially opposite manner; Axial gap; as shown in the figure, the active magnets 16 and the driven magnets 5 are multiple and equal in number, and are respectively embedded in the corresponding power output member 4 (rear end face) and power input member 15 (front end face) and fix the axial end face, and by reasonably setting the axial gap, it is ensured that the maximum torque resistance between the driving magnet 16 and the driven magnet 5 is relatively large, and slippage is avoided.

In this embodiment, the active magnet 16 and the driven magnet 5 are both arc-shaped magnetic tiles, and the arc-shaped magnetic tiles are multiple and evenly distributed along the circumferential direction, and the axes of the two adjacent arc-shaped magnetic tiles in the circumferential direction The same-side end is a magnetic pole with a different name; ensure that the magnetic coupling transmission can be quickly restored after the circumferential slip occurs between the active magnet 16 and the driven magnet 5 under overload torque.

In this embodiment, the spacer 2 is a spacer sleeve with a closed front end, the outer circle of the spacer sleeve forms an annular step I 17 and overlaps with the ring-shaped step II 18 arranged on the inner circle of the handle housing 1 to realize the spacer sleeve Axial limit, the axially opposite surface of the annular step I17 and the annular step II18 is provided with an O-ring 19; as shown in the figure, the front section of the outer circle of the spacer sleeve is concave and forms an annular step I 17 with the rear section, The inner circle of the handle housing and the front section of the outer circle of the spacer sleeve are correspondingly convex, and are fitted with the front section of the outer circle of the spacer sleeve and radially limited to ensure the stability of the spacer 2. At the same time, through the annular step I17 and the ring The axially opposite surface of the step II18 is provided with an O-shaped sealing ring 19. After installation, the rear end of the spacer sleeve is provided with an axially forward pre-tightening force to ensure that the O-shaped sealing ring 19 is subjected to axial compression force, and the sealing The effect is good; of course, the axially forward pre-tightening force can be applied by a circular nut threaded inside the handle housing, which belongs to the prior art and will not be repeated here.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (10)

1. one kind seals driving medical handle, it is characterised in that: include handle housing, be juxtaposed on handle housing vertically Interior magnetic driven output precision and magnetic driven input module, described magnetic driven output precision for engaging biography with cutter Dynamic, described magnetic driven input module is coordinated with power set transmission and is used for being turned by magnetically-actuated magnetic driven output precision Dynamic, it is provided with between described magnetic driven output precision and magnetic driven input module for forming the isolation that axial static seals Part.

The driving medical handle of sealing the most according to claim 1, it is characterised in that: described magnetic driven input module leads to Crossing axial magnetic drives magnetic driven output precision to rotate；Described separator is detachable with handle housing fixing to be connected and front end Face protrudes axially forward formation support shaft, described magnetic driven output precision in the way of axial limiting rotating jacket in support Axle.

The driving medical handle of sealing the most according to claim 2, it is characterised in that: described magnetic driven output precision bag Include and be combined the power output member that transmission coordinates and the driven magnet being fixed on power output member with cutter, outside described power output member It is placed on support shaft and its axial rearward end face is rotatably assorted by the axial forward end face of a plane bearing with separator.

The driving medical handle of sealing the most according to claim 3, it is characterised in that: described plane bearing includes annular guarantor Holding frame and multiple circumferentially distributed in the ball of annular retainer, described annular retainer is coated at support shaft and axially disposed There is the installing hole for installing ball；Described ball diameter is more than the axial length of installing hole.

The driving medical handle of sealing the most according to claim 4, it is characterised in that: the inner circle edge of described annular retainer Extending axially forward formation support set, described support set is radially supported in power output member and support in the way of circumferentially sliding Between axle.

The driving medical handle of sealing the most according to claim 5, it is characterised in that: described installing hole is arranged at annular guarantor Holding the junction of frame and support set, the rear port diameter of installing hole is less than the diameter of ball, the cylindrical edge, rear end of described support set Radially indent forms half arc groove connected with the front port of installing hole, and described ball passes through front port and half arc of installing hole Connected in star coordinates embedding installing hole；Be provided with arc-shaped ring groove in the middle of the inner circle of described installing hole, the radian of described arc-shaped ring groove with The radian of ball outside surface matches.

The driving medical handle of sealing the most according to claim 4, it is characterised in that: outside the front end of described support shaft is fixing Set is provided with spacing ring, and the axial rearward end face of described spacing ring is for being axially positioned power output member；Described power exports Part includes that power output ring and the front end face by power output ring axially protrude the shift fork formed, and described shift fork is Multiple and be along the circumferential direction distributed；The driving medical handle of described sealing also includes the positioning sleeve for location axial to cutter, It is placed on, in described positioning sleeve is fixing in the way of axial rearward end face presses on power output ring, the inner circle that multiple shift fork is formed.

The driving medical handle of sealing the most according to claim 3, it is characterised in that: described magnetic driven input module with Being additionally provided with the decelerator for slowing down between power set, magnetic driven input module includes that circumference transmission is coated at decelerator The power input of output shaft and the active magnet being fixed on power input, described active magnet and driven magnet are with vertically Just to mode attract each other setting；It is provided with axial gap between described active magnet and driven magnet and separator.

The driving medical handle of sealing the most according to claim 8, it is characterised in that: described active magnet and driven magnet Being arc magnetic shoe, described arc magnetic shoe is multiple and is distributed uniformly and circumferentially, and two circumferentially-adjacent arc magnetic shoes Axial same side be synonyms pole.

The driving medical handle of sealing the most according to claim 1, it is characterised in that: described separator is that front end is closed Separation sleeve, the outer ring of described separation sleeve circularize step I and be arranged at handle housing inner circle ring-shaped step II overlap Coordinating and realize separation sleeve axial limiting, the axially facing surface of described ring-shaped step I and ring-shaped step II is provided with O-ring seals.