CN116766105A - A multi-stage speed ratchet wrench - Google Patents

Abstract

The invention discloses a multi-stage rotating speed ratchet wrench, which includes a body, a one-way rotating component and a transmission component. The body includes a connected handle and a head, and the head has a receiving cavity. The one-way rotating component includes a ratchet wheel and a pawl. The ratchet wheel is rotatably installed in the accommodation cavity. The pawl contacts the ratchet wheel so that the ratchet wheel rotates in one direction relative to the body. The transmission assembly includes a transmission part and a bolt joint. The bolt joint is rotatably installed on the body. The transmission part transmission connects the bolt joint and the ratchet. The transmission part has several gears with different transmission ratios, and the transmission part can switch between several gears. The purpose of tightening or loosening the nut is achieved by swinging the handle back and forth. At the same time, since the transmission part has several gears with different transmission ratios, the rotation speed of the bolt can be increased or slowed down during the process of tightening the bolt. In order to twist the bolt faster, or control the rotation of the bolt more slowly and accurately, thereby improving the working efficiency of the wrench.

Description

A multi-stage speed ratchet wrench

Technical field

The invention relates to the field of hardware tools, and in particular to a multi-stage speed ratchet wrench.

Background technique

Traditional torx wrenches can be used to tighten screws and nuts, but this type of wrench requires a wider space to facilitate rotation. If not, in a narrow space, the wrench needs to be rotated to a certain angle before being removed. Re-inserting the rotation makes it quite troublesome to use.

In view of the above shortcomings, those in the field have developed a ratchet wrench. See the patent application number CN202010629939. The nut can be loosened or tightened without removing the ratchet wrench and inserting it again, but the transmission ratio between the existing ratchet wrench handle and the bolt is fixed. The ratchet wrench cannot turn the bolt quickly and efficiently, and at the same time, it is difficult to turn the bolt slowly and accurately, thus limiting the scope of application of the ratchet wrench.

Therefore, how to change the transmission ratio between the ratchet wrench handle and the bolt is an urgent technical problem to be solved.

Contents of the invention

The purpose of the present invention is to overcome the above technical deficiencies, propose a multi-stage speed ratchet wrench, and solve the technical problem in the prior art of how to change the transmission ratio between the ratchet wrench handle and the bolt.

In order to achieve the above technical objectives, the technical solution of the present invention includes a multi-stage speed ratchet wrench, which includes:

The body includes a connected handle and a head, and the head has a receiving cavity;

A one-way rotating assembly, which includes a ratchet wheel and a pawl, the ratchet wheel is rotatably installed in the accommodation cavity, the pawl contacts the ratchet wheel, so that the ratchet wheel rotates in one direction relative to the body;

A transmission assembly, which includes a transmission member and a bolt joint. The bolt joint is rotatably installed on the body. The transmission member is drivingly connected to the bolt joint and the ratchet. The transmission member has several gears with different transmission ratios. position, and the transmission member can switch between several of the gear positions.

Preferably, the transmission member includes a first rotating shaft, a second rotating shaft, an adjusting portion, a plurality of first transmission gears and a plurality of second transmission gears corresponding to a plurality of the first transmission gears, and a plurality of the first transmission gears. The second transmission gears are sleeved on the first rotating shaft in sequence along the axial direction, and a plurality of second transmission gears are sleeved on the second rotating shaft in the axial direction. The second rotating shaft is drivingly connected to the ratchet, and the bolt joint Installed on one end of the first rotating shaft, the adjusting part is installed on the other end of the first rotating shaft. The adjusting part can drive the first rotating shaft to move relative to the body in the axial direction, so that the plurality of The first transmission gear and the plurality of second transmission gears are individually meshed in sequence.

Preferably, the adjustment part includes a limit seat and a first elastic member, the limit seat is provided with a guide hole, the first rotating shaft is movably provided in the guide hole, and the outer periphery of the first rotating shaft is provided with a guide hole. A plurality of first transmission gears have a plurality of corresponding slots, the first elastic member is installed on the limiting seat and partially protrudes from the inner wall of the guide hole, and the first elastic member has a function of pressing the first An elastic force of the outer wall of the rotating shaft. When the first elastic member is partially embedded in the slot, the first elastic member limits the axial movement of the first rotating shaft relative to the guide hole.

Preferably, the pawl is rotatably mounted on the body, has a first position for enabling the ratchet wheel to rotate unidirectionally in a first direction, and has a position for unidirectionally rotating the ratchet wheel in a second direction. the second position, and the first direction and the second direction are opposite, the one-way rotation assembly also includes a switching member, the switching member drives the ratchet wheel in the first position and the second position switch between.

Preferably, the switching member includes a knob and a second elastic member, the knob is fixedly connected to the pawl, and a first limiting groove and a second limiting groove are formed on the outer periphery of the knob, and the second elastic member Installed on the body, it has elastic force to press the outer periphery of the knob, and when the knobs are in the first position and the second position respectively, the second elastic members are partially embedded in the third position. Two limit slots.

Preferably, the pawl has a first rack and a second rack. When the pawl is in the first position, the first rack contacts the ratchet wheel. When the pawl is in the second position, the first rack contacts the ratchet wheel. When the pawl is in the second position, the first rack contacts the ratchet wheel. The second rack contacts the ratchet wheel.

Preferably, the transmission member further includes an auxiliary gear, the auxiliary gear is rotatably mounted on the body, and the auxiliary gear is drivingly connected to the second rotating shaft and the ratchet wheel respectively.

Preferably, the bolt joint includes a sleeve, a plunger and a conversion piece, the sleeve is drivingly connected to the transmission piece, the plunger is movably passed through the sleeve, and the plunger has a part protruding from the The first position of the sleeve, and the second position that is completely hidden in the sleeve and has a receiving groove at the end of the sleeve, the conversion member controls the plunger in the first position and the second position. to switch between the second positions.

Preferably, the side wall of the sleeve is provided with a guide hole, and both ends of the guide hole have a buffer portion respectively. The conversion member includes a third elastic member and a handle, and the handle is slidably provided in the guide hole. The handle is connected to the third elastic member, and the third elastic member is installed on the plunger and has elastic force to move the handle away from the plunger. When the plunger is in the first position and the first position respectively, In the second position, the third elastic member is partially embedded in the two buffer parts.

Preferably, the body is a metal body.

Compared with the prior art, the beneficial effects of the present invention include: first, the ratchet wheel is rotatably installed in the accommodation cavity, and the ratchet wheel can only rotate in one direction under the action of the pawl. Since the transmission member drives the ratchet and the bolt joint, the bolt joint can only rotate in one direction. Therefore, the bolt joint can be tightened or loosened by reciprocating swinging of the handle without the bolt joint being separated from the bolt. At the same time, since the transmission part has several gears with different transmission ratios, the rotation speed of the bolt can be increased or slowed down during the process of tightening the bolt. In order to twist the bolt faster, or control the rotation of the bolt more slowly and accurately, thereby improving the working efficiency of the wrench.

Description of drawings

Figure 1 is a multi-stage ratchet wrench according to an embodiment of the present invention;

Figure 2 is a schematic diagram of the internal structure of a multi-stage ratchet wrench according to an embodiment of the present invention;

Figure 3 is a schematic structural diagram of the switching member according to the embodiment of the present invention;

Figure 4 is an exploded schematic diagram of a bolt joint according to an embodiment of the present invention;

Figure 5 is a schematic diagram of the internal structure of the adjustment part according to the embodiment of the present invention;

Among them, the body 100, the handle 110, the head 120, the accommodation cavity 121, the one-way rotating assembly 200, the ratchet 210, the pawl 220, the first rack 221, the second rack 222, the switching member 230, the knob 231, The first limiting groove 2311, the second limiting groove 2312, the second elastic member 232, the transmission assembly 300, the transmission member 310, the first rotating shaft 311, the card slot 3111, the second rotating shaft 312, the adjusting part 313, and the limiting seat 3131 , guide hole 31311, first elastic member 3132, first transmission gear 314, second transmission gear 315, auxiliary gear 316, bolt joint 320, sleeve 321, guide groove 3211, plunger 322, conversion piece 323, third elasticity Part 3231, handle 3232.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

Referring to Figures 1 to 5, an embodiment of the present invention provides a multi-stage speed ratchet wrench, which belongs to the field of hardware tools. The multi-stage speed ratchet wrench is used for twisting bolts. The above-mentioned multi-stage speed ratchet wrench can adjust the internal ratchet 210 and the bolt joint 320, thereby increasing or slowing down the rotation speed of the bolt during the process of tightening the bolt. In order to twist the bolt faster, or control the rotation of the bolt more slowly and accurately, thereby improving the working efficiency of the wrench.

In some preferred embodiments, a multi-speed ratchet wrench includes a body 100, a one-way rotation assembly 200 and a transmission assembly 300. The body 100 includes a connected handle 110 and a head 120, and the head 120 has a receiving cavity 121 inside. . The one-way rotating assembly 200 includes a ratchet wheel 210 and a pawl 220 . The ratchet wheel 210 is rotatably installed in the accommodation cavity 121 . The pawl 220 contacts the ratchet wheel 210 so that the ratchet wheel 210 rotates in one direction relative to the body 100 . The transmission assembly 300 includes a transmission member 310 and a bolt joint 320. The bolt joint 320 is rotatably installed on the body 100. The transmission member 310 transmission connects the bolt joint 320 and the ratchet 210. The transmission member 310 has several gears with different transmission ratios, and The transmission member 310 can switch between several gears.

In the above embodiment, the ratchet wheel 210 is first rotatably installed in the accommodating cavity 121, and the ratchet wheel 210 can only rotate in one direction under the action of the pawl 220. Since the transmission member 310 is drivingly connected to the ratchet wheel 210 and the bolt joint 320, the bolt joint 320 can only rotate in one direction. Therefore, the bolt joint 320 can be tightened or loosened by reciprocating the handle 110 without the bolt joint 320 being detached from the bolt. At the same time, since the transmission member 310 has several gears with different transmission ratios, the rotation speed of the bolt can be increased or slowed down during the process of loosening the bolt. In order to twist the bolt faster, or control the rotation of the bolt more slowly and accurately, thereby improving the working efficiency of the wrench.

In some preferred embodiments, the transmission member 310 includes a first rotating shaft 311, a second rotating shaft 312, an adjusting portion 313, a plurality of first transmission gears 314 and a plurality of second transmission gears 315 corresponding to the plurality of first transmission gears 314. A plurality of first transmission gears 314 are sequentially sleeved on the first rotating shaft 311 along the axial direction, and a plurality of second transmission gears 315 are sequentially sleeved on the second rotating shaft 312 along the axial direction. The second rotating shaft 312 is drivingly connected to the ratchet 210 and the bolt joint 320 Installed on one end of the first rotating shaft 311, the adjusting part 313 is installed on the other end of the first rotating shaft 311. The adjusting part 313 can drive the first rotating shaft 311 to move relative to the body 100 in the axial direction, so as to drive a plurality of first transmission gears 314 and a plurality of second transmission gears. Gears 315 mesh individually in turn.

In the above embodiment, the number of teeth of each first transmission gear 314 is different, and the corresponding number of teeth of each second transmission gear 315 is also different. When each first transmission gear 314 meshes with its corresponding second transmission gear 315, the transmission ratio between the first rotating shaft 311 and the second rotating shaft 312 can be changed, thereby ultimately changing the transmission ratio between the ratchet 210 and the bolt joint 320. gear ratio. By using the adjusting part 313 to drive the first rotating shaft 311 to move in the axial direction, each first transmission gear 314 can be meshed with its corresponding second transmission gear 315 in sequence, so that the transmission member 310 can switch between various gears. . In addition, it should be noted that the spacing of each first transmission gear 314 is different from the spacing of each second transmission gear 315, thereby ensuring that several first transmission gears 314 and several second transmission gears 315 can mesh individually in sequence.

As long as the first rotation can be controlled to move relative to the body 100, all implementations are feasible. In some preferred embodiments, the adjustment part 313 includes a limiting seat 3131 and a first elastic member 3132. The limiting seat 3131 is provided with a guide hole 31311. The first rotating shaft 311 is movably installed in the guide hole 31311. A plurality of slots 3111 corresponding to a plurality of first transmission gears 314 are formed on the outer periphery of the first rotating shaft 311. The first elastic member 3132 is installed on the limiting seat 3131 and partially protrudes from the On the inner wall of the guide hole 31311, the first elastic member 3132 has elastic force to press against the outer wall of the first rotating shaft 311. When the first elastic member 3132 is partially embedded in the slot 3111, the first elastic member 3132 restricts the first rotating shaft 311 from facing the guide hole. 31311 moves axially.

In the above embodiment, the first rotating shaft 311 can be pulled to cause the first rotating shaft 311 to slide along the guide hole 31311. When the first elastic member 3132 is partially embedded in a certain slot 3111, the first rotating shaft 311 can be restricted from sliding relative to the guide hole 31311, so that a certain pair of first transmission gears 314 and second transmission gears 315 mesh with each other.

In some preferred embodiments, the pawl 220 is rotatably mounted on the body 100. The pawl 220 has a first position for allowing the ratchet wheel 210 to unidirectionally rotate in the first direction, and has a position for unidirectionally rotating the ratchet wheel 210 along the second direction. In the second position, and the first direction and the second direction are opposite, the one-way rotation assembly 200 further includes a switching member 230 that drives the ratchet 210 to switch between the first position and the second position.

Based on the above embodiments, in some preferred embodiments, the switching member 230 includes a knob 231 and a second elastic member 232. The knob 231 is fixedly connected to the pawl 220, and a first limiting groove 2311 and a third limiting groove 2311 are formed on the periphery of the knob 231. The second limiting groove 2312 and the second elastic member 232 are installed on the body 100 and have elastic force to resist the outer periphery of the knob 231. When the knob 231 is in the first position and the second position respectively, the second elastic member 232 is partially embedded in the body 100. The second limiting groove 2312. Therefore, the knob 231 can be stably in the first position or the second position.

In some preferred embodiments, the pawl 220 has a first rack 221 and a second rack 222. When the pawl 220 is in the first position, the first rack 221 contacts the ratchet 210. When the pawl 220 is in the second position, The second rack 222 contacts the ratchet 210 . It should be noted here that the first rack 221 and the second rack 222 each have a plurality of wedge-shaped teeth, and the wedge surfaces of the wedge-shaped teeth on the first rack 221 and the second rack 222 are exactly opposite. Therefore, when the distribution of the first rack 221 and the second rack 222 contacts the ratchet 210, they can both cause the ratchet 210 to rotate in one direction, and limit the rotation direction of the ratchet 210 to be exactly opposite.

In some preferred embodiments, the transmission member 310 also includes an auxiliary gear 316. The auxiliary gear 316 is rotatably installed on the body 100. The auxiliary gear 316 is drivingly connected to the second rotating shaft 312 and the ratchet 210 respectively. Thereby, the second rotating shaft 312 and the ratchet wheel 210 are transmission connected to each other via the auxiliary gear 316 .

In some preferred embodiments, the bolt joint 320 includes a sleeve 321, a plunger 322 and a conversion piece 323. The sleeve 321 is drivingly connected to the transmission member 310, and the plunger 322 is movably threaded through the sleeve 321. The plunger 322 has a part protruding from The switching member 323 controls the plunger 322 to switch between the first position and the second position of the sleeve 321 in the first position and the second position in which the sleeve 321 is completely hidden and has a receiving groove at the end of the sleeve 321 . When the plunger 322 is in the first position, the hexagon socket bolt can be screwed by the plunger 322 . When the plunger 322 is in the second position, the sleeve 321 can be used to screw the external hexagonal bolt.

In some preferred embodiments, a guide groove 3211 is provided on the side wall of the sleeve 321, and a buffer portion is provided at both ends of the guide groove 3211. The conversion member 323 includes a third elastic member 3231 and a handle 3232, and the handle 3232 is slidably disposed in the guide groove 3211. , the handle 3232 is connected to the third elastic member 3231. The third elastic member 3231 is installed on the plunger 322 and has the elastic force to make the handle 3232 away from the plunger 322. When the plunger 322 is in the first position and the second position respectively, the third elastic member 3231 is installed on the plunger 322. The elastic members 3231 are partially embedded in the two buffer parts.

In some preferred embodiments, the body 100 is a metal body. Thus, the body 100 has sufficient structural strength.

First, the ratchet 210 is rotatably installed in the accommodating cavity 121, and the ratchet pawl 220 is rotatably mounted on the body 100. The pawl 220 has a first position that allows the ratchet wheel 210 to rotate unidirectionally in the first direction, and has a function that allows the ratchet wheel 210 to rotate in one direction. The second position of unidirectional rotation along the second direction, and the first direction and the second direction are opposite. The unidirectional rotation assembly 200 also includes a switching member 230. The switching member 230 drives the ratchet 210 to switch between the first position and the second position. . Since the transmission member 310 is drivingly connected to the ratchet wheel 210 and the bolt joint 320, the bolt joint 320 can only rotate in one direction. Therefore, the bolt joint 320 can be tightened or loosened by reciprocating the handle 110 without the bolt joint 320 being detached from the bolt. By using the adjusting part 313 to drive the first rotating shaft 311 to move in the axial direction, each first transmission gear 314 can be meshed with its corresponding second transmission gear 315 in sequence, so that the transmission member 310 can switch between various gears. . In addition, it should be noted that the spacing of each first transmission gear 314 is different from the spacing of each second transmission gear 315, thereby ensuring that several first transmission gears 314 and several second transmission gears 315 can mesh individually in sequence. This can increase or slow down the rotation speed of the bolt during the process of tightening the bolt. In order to twist the bolt faster, or control the rotation of the bolt more slowly and accurately, thereby improving the working efficiency of the wrench.

The above-described specific embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (10)

1. A multi-stage rotational speed ratchet wrench, comprising:

the body comprises a grab handle and a head which are connected, and the head is internally provided with a containing cavity;

the unidirectional rotation assembly comprises a ratchet wheel and a pawl, the ratchet wheel is rotatably arranged in the accommodating cavity, and the pawl contacts the ratchet wheel so as to enable the ratchet wheel to rotate unidirectionally relative to the body;

the transmission assembly comprises a transmission part and a bolt joint, wherein the bolt joint is rotatably arranged on the body, the transmission part is in transmission connection with the bolt joint and the ratchet wheel, the transmission part is provided with a plurality of gears with different transmission ratios, and the transmission part can be switched among a plurality of gears.

2. The multi-stage rotating speed ratchet wrench according to claim 1, wherein the driving member comprises a first rotating shaft, a second rotating shaft, an adjusting portion, a plurality of first driving gears and a plurality of second driving gears corresponding to the first driving gears one by one, the first driving gears are sequentially sleeved on the first rotating shaft in the axial direction, the second driving gears are sequentially sleeved on the second rotating shaft in the axial direction, the second rotating shaft is in transmission connection with the ratchet, the bolt joint is mounted at one end of the first rotating shaft, the adjusting portion is mounted at the other end of the first rotating shaft, and the adjusting portion can drive the first rotating shaft to move relative to the body in the axial direction so that the first driving gears and the second driving gears are sequentially and independently meshed.

3. The multi-stage rotation speed ratchet wrench according to claim 2, wherein the adjusting portion includes a limiting seat and a first elastic member, the limiting seat is provided with a guide hole, the first rotating shaft movably penetrates through the guide hole, a plurality of clamping grooves corresponding to the plurality of first transmission gears one by one are formed in the periphery of the first rotating shaft, the first elastic member is mounted on the limiting seat and partially protrudes out of the inner wall of the guide hole, the first elastic member has an elastic force against the outer wall of the first rotating shaft, and when the first elastic member is partially embedded in the clamping grooves, the first elastic member limits the first rotating shaft to move axially relative to the guide hole.

4. The multi-speed ratchet wrench of claim 1, wherein the pawl is rotatably mounted to the body, the pawl having a first position for unidirectional rotation of the ratchet in a first direction and having a second position for unidirectional rotation of the ratchet in a second direction, and wherein the first and second directions are opposite, the unidirectional rotation assembly further comprising a switch that drives the ratchet to switch between the first and second positions.

5. The multi-stage ratchet wrench of claim 4, wherein the switching member comprises a knob and a second elastic member, the knob is fixedly connected with the pawl, a first limit groove and a second limit groove are formed in the periphery of the knob, the second elastic member is mounted on the body and has an elastic force for pressing the periphery of the knob, and when the knob is respectively located at the first position and the second position, the second elastic member is respectively partially embedded in the second limit groove.

6. The multi-speed ratchet wrench of claim 4, wherein the pawl has a first rack and a second rack, the first rack contacting the ratchet when the pawl is in a first position and the second rack contacting the ratchet when the pawl is in a second position.

7. The multi-speed ratchet wrench of claim 2, wherein the driving member further comprises an auxiliary gear rotatably mounted to the body, the auxiliary gear drivingly connecting the second shaft and the ratchet wheel, respectively.

8. The multi-speed ratchet wrench of claim 1, wherein the bolted joint includes a sleeve, a plunger and a transition piece, the sleeve drivingly connected to the drive, the plunger movably disposed through the sleeve, the plunger having a first position partially protruding from the sleeve, and a second position fully recessed from the sleeve and having a receiving slot at an end of the sleeve, the transition piece controlling the plunger to switch between the first and second positions.

9. The multi-stage ratchet wrench of claim 8, wherein the sleeve has a guide hole formed in a side wall thereof, two buffer portions are provided at both ends of the guide hole, the conversion member includes a third elastic member and a handle slidably disposed in the guide hole, the handle is connected to the third elastic member, the third elastic member is mounted to the plunger and has an elastic force for keeping the handle away from the plunger, and when the plunger is in the first position and the second position, the third elastic member is partially embedded in the two buffer portions, respectively.

10. The multi-speed ratchet wrench of claim 1, wherein the body is a metal body.