CN108621073B

CN108621073B - Torque wrench

Info

Publication number: CN108621073B
Application number: CN201810227714.4A
Authority: CN
Inventors: 江水来
Original assignee: William Tools Co ltd
Current assignee: William Tools Co ltd
Priority date: 2017-03-20
Filing date: 2018-03-20
Publication date: 2020-03-20
Anticipated expiration: 2038-03-20
Also published as: CN108621073A; TWI645944B; TW201834794A; DE202017101615U1

Abstract

The invention discloses a torque wrench, which comprises a wrench unit and a handle unit. The handle unit comprises a body connected with the wrench unit, a rotating wheel and a locking mechanism, wherein the rotating wheel is used for adjusting the torque value, and the rotating wheel can be fixed through the locking mechanism. The locking mechanism comprises a switching piece, at least one positioning piece and a ring tooth part annularly arranged on the inner wall of the body. Each positioning piece penetrates through the rotating wheel and is controlled by the switching piece, when the switching piece is positioned at a release position, each positioning piece is not combined with the annular tooth part for positioning, and the rotating wheel can rotate relative to the body; when the switching piece is located at a locking position, each positioning piece is combined with the annular tooth part for positioning, and the rotating wheel cannot rotate relative to the body.

Description

Torque wrench

Technical Field

The present invention relates to hand tools, and more particularly to a torque wrench.

Background

In order to meet the requirement of the application, manufacturers have developed a torque wrench capable of adjusting the torque output, and such torque wrenches usually rotate a knob at the rear of a grip portion to drive a compression rod to compress/release an elastic member, thereby adjusting the torque output. Such as the torque wrench disclosed in taiwan patent No. TWM421203, etc.

However, in the known torque wrench, when the torque is adjusted, the knob is first pulled out of the grip in the axial direction, so that the knob can be rotated to adjust the torque after the knob is separated from the positioning state; when the adjustment is completed, the knob needs to be pressed into the handle to return to the positioning state, such a positioning adjustment operation mode requires axial and radial operations, which is complicated and inconvenient to use, and has the disadvantages of requiring urgent improvement.

Therefore, there is a need for a new and improved torque wrench to solve the above problems.

Disclosure of Invention

The main objective of the present invention is to provide a torque wrench, which enables an operator to quickly position a desired output torque value, and simplifies the operation process; and, the structure is brief, easily assembly production in addition, can also have more accurate reliable output torsion value.

In order to achieve the purpose, the invention adopts the following technical scheme:

a torque wrench, comprising:

a wrench unit, which comprises a sleeve, a working rod, a torsion transmission mechanism and a tripping mechanism for connecting the working rod and the torsion transmission mechanism, wherein the working rod comprises a tool head and a transmission rod connected with the tool head, the transmission rod is pivoted with the sleeve, the torsion transmission mechanism comprises a pushing component connected with the tripping mechanism, a pressure rod capable of moving along the axial direction of the sleeve and an elastic component, and the elastic component is connected between the pressure rod and the pushing component;

a handle unit, which comprises a body connected with the sleeve, a torsion adjusting mechanism and a locking mechanism, wherein the torsion adjusting mechanism comprises a rotating wheel, part of the rotating wheel extends into the body to be connected with the pressure rod to form a same rotating relation, the rotating wheel can selectively rotate relative to the body to control the pressure rod to axially move along the sleeve, the locking mechanism comprises a switching piece, at least one positioning piece and a ring tooth part annularly arranged on the inner wall of the body, one end of each positioning piece penetrates through the rotating wheel to be selectively meshed with the ring tooth part in the radial direction of the sleeve, the other end of each positioning piece is connected with the switching piece to form a linkage relation, and the switching piece is used for external operation and can be rotationally switched between a release position and a locking position by taking the axis of the sleeve as a shaft;

when the switching piece is positioned at the release position, each positioning piece is not combined with the annular tooth part for positioning, and the rotating wheel can rotate relative to the body; when the switching piece is located at the locking position, each positioning piece is combined with the annular tooth part for positioning, and the rotating wheel cannot rotate relative to the body.

Each positioning piece is arranged on the rotating wheel in a swinging manner, two ends of each positioning piece are respectively provided with an engagement part and an actuating part, the engagement part is selectively engaged with the annular tooth part, and part of the switching piece can selectively abut against the actuating part, so that the actuating part has the tendency of moving towards a specific direction; when the switch member is located at the release position, each actuating part moves towards the direction away from the axis of the sleeve, and when the switch member is located at the locking position, each actuating part moves towards the direction close to the axis of the sleeve.

The switching piece is rotatably arranged on the rotating wheel and comprises at least one control mechanism, the at least one control mechanism respectively corresponds to at least one positioning piece, each control mechanism comprises a sliding chute, a first jacking piece and a second jacking piece, the actuating part is accommodated in the sliding chute, the first jacking piece and the second jacking piece protrude out of two opposite sides of the sliding chute, and in the radial direction of the sleeve, the first jacking piece is closer to the axial lead of the sleeve than the second jacking piece; when the switching piece is positioned at the release position, the first ejecting piece abuts against the actuating part to move towards the direction away from the axis of the sleeve, and when the switching piece is positioned at the locking position, the second ejecting piece presses against the actuating part to move towards the direction close to the axis of the sleeve.

The opposite sides of the first top piece and the second top piece are respectively provided with a smooth guide surface, and the actuating part can move along the smooth guide surfaces so as to keep mutual abutting relation with the first top piece or the second top piece in the radial direction of the sleeve.

The tripping mechanism comprises a linkage plate and two rolling pieces, the transmission rod and the pushing component are respectively connected with two ends of the linkage plate to form a connecting rod mechanism, the two rolling pieces are pivoted on the pushing component and roll against the inner wall of the sleeve, when the force application reaches a preset torsion value, a knocking part of the transmission rod can knock the inner wall of the sleeve, and then the linkage plate drives the pushing component to move backwards to extrude the elastic piece; wherein, the two rolling pieces and the inner wall of the sleeve are positioned at the same side where the knocking part knocks.

The torsion force transmission mechanism also comprises a torsion force display tube which rotates synchronously with the pressure rod, the torsion force display tube is provided with a plurality of scales, the torsion force display tube is positioned in the sleeve and is opposite to the body, and the sleeve and the body are respectively provided with a through hole corresponding to the plurality of scales.

The pressure lever comprises a threaded section and a sleeving section which are connected, the torsion display barrel is sleeved on the sleeving section and is fixed on the sleeving section by at least one positioning component, each positioning component comprises a countersunk head screw and a positioning block, the positioning block is arranged between the pressure lever and the countersunk head screw, the torsion transmission mechanism further comprises a screw hole barrel combined with the threaded section, and the screw hole barrel is fixedly arranged on the sleeve; at least one through hole is arranged at the position of the sleeve corresponding to the at least one positioning component, and a tool is inserted into each through hole to unscrew or screw the countersunk head screw.

The torsion force transmission mechanism further comprises a transmission assembly positioned between the end face of the pressure lever and the elastic piece, the transmission assembly comprises a spring gasket contacted with the elastic piece and a rolling body, and the rolling body is arranged between the end face of the pressure lever and the spring gasket.

The sleeve, the rotating wheel and the switching piece are coaxially and concentrically arranged; the tripping mechanism comprises a linkage plate and two rolling pieces, the transmission rod and the pushing component are respectively connected with two ends of the linkage plate to form a connecting rod mechanism, the two rolling pieces are pivoted on the pushing component and roll against the inner wall of the sleeve, when the force application reaches a preset torsion value, a knocking part of the transmission rod can knock the inner wall of the sleeve, and then the linkage plate drives the pushing component to move backwards to extrude the elastic piece; wherein, the two rolling pieces and the inner wall of the sleeve are positioned at the same side where the knocking part knocks the inner wall of the sleeve; the torsion force transmission mechanism also comprises a torsion force display cylinder which synchronously rotates with the pressure rod, the torsion force display cylinder is provided with a plurality of scales, the torsion force display cylinder is positioned in the sleeve and is opposite to the body, and the sleeve and the body are respectively provided with a through hole corresponding to the plurality of scales; the torque force transmission mechanism also comprises a transmission assembly positioned between the end surface of the pressure lever and the elastic piece, the transmission assembly comprises a spring gasket contacted with the elastic piece and a rolling body, and the rolling body is arranged between the end surface of the pressure lever and the spring gasket; the pressure lever comprises a thread section and a sleeving section which are connected, the torsion display barrel is sleeved on the sleeving section and is fixed on the sleeving section by at least one positioning component, each positioning component comprises a countersunk head screw and a positioning block, the positioning block is arranged between the pressure lever and the countersunk head screw, the torsion transmission mechanism further comprises a screw hole barrel combined with the thread section, and the screw hole barrel is fixedly arranged on the sleeve; at least one through hole is arranged at the position of the sleeve corresponding to the at least one positioning component, and a tool is inserted into each through hole to unscrew or screw the countersunk head screw; the number of the at least one control mechanism is equal to that of the at least one positioning piece, the number of the at least one positioning piece is two, and the at least one positioning piece is arranged in an axisymmetrical mode by taking the shaft axis as an axis; the pushing component also comprises a pushing piece, a holding piece and a spring thimble, the pushing piece and the transmission rod are respectively pivoted at two ends of the linkage plate, the two rolling pieces are pivoted at the pushing piece, the pushing piece penetrates through the holding piece and is inserted into the spring thimble to form a whole, and the spring thimble is sleeved at one end of the elastic piece; a magnifying lens arranged in the through hole for magnifying the scale for external viewing; the rolling member is selected from any one of a ball, a roller, and a disk.

A torque wrench, comprising:

a wrench unit including a sleeve, a working rod, a torque transmission mechanism, and a tripping mechanism connecting the working rod and the torque transmission mechanism, the working rod comprises a tool head, a transmission rod connected with the tool head, the transmission rod is pivoted with the sleeve, the torsion force transmission mechanism comprises a pushing component connected with the tripping mechanism, a pressure lever capable of moving along the axial direction of the sleeve and an elastic piece, the elastic element is connected between the pressure lever and the ejection component, the tripping mechanism comprises a linkage plate and two rolling elements, the driving rod and the pushing component are respectively connected with two ends of the linkage plate to form a connecting rod mechanism, the two rolling pieces are pivoted on the pushing component and roll against the inner wall of the sleeve, when the force application reaches a preset torsion value, a knocking part of the transmission rod can knock the inner wall of the sleeve, so that the pushing component is driven to move backwards through the linkage sheet to extrude the elastic part;

the handle unit comprises a body connected with the sleeve, a torsion adjusting mechanism and a locking mechanism, wherein the torsion adjusting mechanism is arranged on the body, a rotating wheel of the torsion adjusting mechanism and the pressure rod form the same rotating relation, the rotating wheel is operated and rotated by the outside to control the pressure rod to move, and the locking mechanism is used for selectively stopping and interfering the rotating wheel to rotate.

The invention has the beneficial effects that: according to the torque wrench disclosed by the invention, a user can quickly position the torque force by only rotating the switching piece, so that the operation is very convenient. And, through this ring tooth portion meshing of locating piece radial, can reduce the volume of occupation. In addition, the device has the advantages of simple structural design and easy assembly and production.

Drawings

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a cross-sectional view of fig. 1.

Fig. 4 and 5 are partial cross-sectional views illustrating the operation of a preferred embodiment of the present invention.

Fig. 6 and 7 are cross-sectional views from another perspective of fig. 4 and 5, respectively.

Fig. 8 is a perspective view of the switching member according to a preferred embodiment of the invention.

Fig. 9 and 10 are schematic views illustrating the operation of the tripping mechanism and the pushing assembly according to the present invention.

1: torque wrench 43: screw hole cylinder

2: the wrench unit 44: rotating wheel

21: a sleeve 5: locking mechanism

211: shaft axis 51: switching piece

212: through hole 511: control mechanism

22: the working rod member 512: sliding chute

221: the tool head 513: first top member

222: the transmission rod 514: second head piece

223: the knocking portion 515: smooth guide surface

3: torque transmission mechanism 52: locating piece

31: the ejection assembly 521: occlusion part

311: a pusher member 522: actuating part

312: the shaft holder 53: ring tooth part

313: the spring thimble 54: torsion display tube

32: a pressure lever 541: scale division

321: the socket section 55: transfer assembly

322: threaded segment 551: spring washer

33: the elastic member 552: rolling body

34: the tripping mechanism 6: positioning assembly

341: the linkage sheet 61: countersunk head screw

342: the rolling members 62: locating block

4: a handle unit 7: magnifying glasses

41: a body 8: through hole

42: torsion adjusting mechanism

Detailed Description

The following description is given by way of example only, and is not intended to limit the scope of the invention.

Referring to fig. 1 to 10, which illustrate a preferred embodiment of the present invention, a torque wrench 1 of the present invention includes a wrench unit 2 and a handle unit 4.

The wrench unit 2 includes a sleeve 21, a working rod 22, a torque transmission mechanism 3, and a trip mechanism 34 connecting the working rod 22 and the torque transmission mechanism 3, the working rod 22 includes a tool head 221, a transmission rod 222 connected to the tool head 221, the transmission rod 222, the trip mechanism 34, and the torque transmission mechanism 3 are disposed inside the sleeve 21, the transmission rod 222 is pivotally connected to the sleeve 21, the torque transmission mechanism 3 includes a pushing component 31 connected to the trip mechanism 34, a pressing rod 32 axially movable along the sleeve 21, and an elastic component 33, the elastic component 33 is connected between the pressing rod 32 and the pushing component 31, so that the elastic component 33 can be selectively compressed and released by the movement of the pressing rod 32.

The handle unit 4 is connected to the sleeve 21, the handle unit 4 includes a main body 41 connected to the sleeve 21, a torsion adjusting mechanism 42, and a locking mechanism 5, the torsion adjusting mechanism 42 includes a rotating wheel 44, a portion of the rotating wheel 44 extends into the main body 41 to be connected to the pressing rod 32 to form a same rotation relationship, and the rotating wheel 44 can selectively rotate relative to the main body 41 to control the pressing rod 32 to move axially along the sleeve 21. The locking mechanism 5 includes a switching member 51, at least one positioning member 52, and a ring gear 53 annularly disposed on the inner wall of the body 41, one end of each positioning member 52 penetrates through the rotating wheel 44 and is selectively engaged with the ring gear 53 in the radial direction of the sleeve 21, the other end of each positioning member 52 is connected to the switching member 51 to form a linkage relationship, and the switching member 51 is operated by the outside and can be switched between a release position and a locking position by rotating around the axis of the sleeve 21. When the switch member 51 is located at the releasing position, each positioning member 52 is not coupled to the annular tooth portion 53 for positioning, and each positioning member 52 is in a free state without interfering with the rotating wheel 44, so that the rotating wheel 44 can rotate relative to the body 41; when the switching member 51 is located at the locking position, each positioning member 52 is combined with the annular gear 53 for positioning, and at this time, each positioning member 52 remains fixed and generates a blocking interference effect with the rotating wheel 44 in the rotating direction, so that the rotating wheel 44 cannot rotate relative to the body 41, thereby achieving the purpose of locking the torque value.

More specifically, each positioning element 52 is pivotally disposed on the rotating wheel 44 about a pivot axis perpendicular to an axial line 211 of the sleeve 21, and each positioning element 52 has two ends respectively including an engaging portion 521 and an actuating portion 522, the engaging portion 521 is serrated, and the engaging portion 521 selectively engages with the ring-tooth portion 53, so that the engaging portion 521 and the ring-tooth portion 53 have a larger contact area in the circumferential direction of the body 41 and are in a mutually interfering state, thereby achieving a better positioning effect. More specifically, a portion of the switch 51 can selectively abut against the actuating portion 522, so that the actuating portion 522 has a tendency to move in a specific direction; when the switch member 51 is located at the release position, each of the actuating portions 522 is moved away from the axis 211 of the sleeve 21, and when the switch member 51 is located at the lock position, each of the actuating portions 522 is moved toward the axis 211 of the sleeve 21.

The switch member 51 is rotatably disposed on the rotating wheel 44, the switch member 51 includes at least one control mechanism 511, and the at least one control mechanism 511 corresponds to the at least one positioning member 52; in the embodiment, the number of the at least one control mechanism 511 is equal to the number of the at least one positioning element 52, and the number of the at least one positioning element 52 is two and is configured to be axisymmetrical about the axis 211, so as to provide a smooth supporting force to lock the rotating wheel 44. Specifically, each control mechanism 511 includes a sliding slot 512, a first top part 513 and a second top part 514, the actuating part 522 is accommodated in the sliding slot 512, the first and second

top parts

513, 514 protrude from opposite sides of the sliding slot 512, and in the radial direction of the sleeve 21, the first top part 513 is closer to the axial line 211 of the sleeve 21 than the second top part 514. When the switch member 51 is controlled by the outside to rotate to the release position, the first pushing member 513 pushes against the actuating portion 522 to move in a direction away from the axis 211 of the sleeve 21, and when the switch member 51 is located at the lock position, the second pushing member 514 pushes against the actuating portion 522 to move in a direction close to the axis 211 of the sleeve 21.

Therefore, during the operation, the switch member 51 controls the positioning members 52 to swing to keep engaging with or separating from the ring gear 53 by rotating around the axis 211, in other words, the user only needs to rotate the switch member 51 to perform the locking/releasing action, which is very convenient for operation. In this embodiment, the positioning members 52 are designed to swing like a seesaw, and can be locked/released in response to the change in position of the switching member 51. Moreover, the positioning member 52 and the ring gear 53 are disposed along the radial direction of the sleeve 21, so that the required space of the sleeve 21 in the axial direction can be effectively reduced, and the torque wrench 1 has a simple overall structure, occupies no space, and operates quickly and reliably.

Preferably, the mutually facing sides of the first and second

top members

513, 514 are respectively provided with a smooth guiding surface 515, so that the actuating portion 522 can move smoothly along the smooth guiding surface 515 without the problem of being locked and unable to move, which not only can effectively improve the smoothness of the switching position of the switching member 51, but also can ensure that the actuating portion 522 can be in mutual abutting relation with the first top member 513 or the second top member 514 in the radial direction of the sleeve 21.

More specifically, the trip mechanism 34 includes a linking plate 341 and two rolling members 342, the driving rod 222 and the pushing assembly 31 are respectively connected to two ends of the linking plate 341 to form a link mechanism, the two rolling members 342 are pivotally disposed on the pushing assembly 31 and roll against the inner wall of the sleeve 21, when the force application reaches a preset torque value, a knocking portion 223 of the driving rod 222 knocks the inner wall of the sleeve 21, and the linking plate 341 drives the pushing assembly 31 to move backward to extrude the elastic member 33; wherein, the two rolling members 342 are located on the same side as the inner wall of the casing 21 where the knocking portion 223 knocks.

More specifically, the pushing assembly 31 further includes a pushing element 311, a supporting element 312 and a spring top pin 313, the pushing element 311 and the transmission rod 222 are respectively pivoted to two ends of the linking plate 341, the two rolling elements 342 are pivoted to the pushing element 311, the pushing element 311 penetrates through the supporting element 312 and is inserted into the spring top pin 313 to form a whole, and the spring top pin 313 is sleeved on one end of the elastic element 33.

The pushing element 311 can have more contact with the inner wall of the sleeve 21 through the two rolling elements 342, that is, the two rolling elements 342 can provide enough support to the pushing element 311, so that the pushing element 311 can move more stably and is not easy to deflect, the pushing element 311 and the spring thimble 313 are ensured not to rub against the inner wall of the sleeve 21, and the torque wrench can actually output a predicted torque value. In the present embodiment, the rolling member 342 is selected from any one of a ball, a roller, and a disk.

Preferably, the torque transmission mechanism 3 further comprises a torque display cylinder 54 rotating synchronously with the pressing rod 32, the torque display cylinder 54 is provided with a plurality of scales 541, the torque display cylinder 54 is located inside the sleeve 21 and opposite to the body 41, and the sleeve 21 and the body 41 are respectively provided with a through hole 8 corresponding to the plurality of scales 541, so that a user can directly and visually know the maximum torque value output by the torque wrench 1. Preferably, a magnifying glass 7 is disposed in the through hole 8, and the magnifying glass 7 is used for magnifying a scale 541 for external viewing.

In this embodiment, the pressing rod 32 includes a threaded section 322 and a socket section 321 connected to each other, the torsion display tube 54 is sleeved on the socket section 321 and fixed to the socket section 321 by at least one positioning element 6, each positioning element 6 includes a countersunk screw 61 and a positioning block 62, the positioning block 62 is disposed between the pressing rod 32 and the countersunk screw 61, at least one through hole 212 is disposed at a position of the casing 21 corresponding to the at least one positioning element 6, and each through hole 212 is used for a tool to extend into to unscrew or screw the countersunk screw 61.

It should be noted that the torque transmission mechanism 3 further includes a screw hole tube 43 combined with the pressing rod 312, one end of the pressing rod 312 is movably inserted into the rotating wheel 44 and is in the same rotating relationship with the rotating wheel 44, the screw hole tube 43 is fixedly disposed on the sleeve 21, so that when the rotating wheel 44 is rotated, the pressing rod 312 can move along the axial direction of the sleeve 21 in addition to the rotation, and compress or release the elastic member 33, thereby adjusting the torque. In the present embodiment, the sleeve 21, the rotating wheel 44 and the switch member 51 are coaxially disposed.

Preferably, the torque force transmission mechanism 3 further comprises a transmission assembly 55 located between the end surface of the pressing rod 32 and the elastic member 33, the transmission assembly 55 comprises a spring washer 551 contacting with the elastic member 33, and a roller 552, and the roller 552 is located between the end surface of the pressing rod 32 and the spring washer 551. The pressing rod 32 can more evenly push against the elastic member 33 to move through the spring washer 551, and the rolling body 552 can make the pressing rod 32 smoothly rotate.

In summary, the torque wrench of the present invention can quickly position the torque by rotating the switch member, which is very convenient for operation. And, through this ring tooth portion meshing of locating piece radial, can reduce the volume of occupation. In addition, the device has the advantages of simple structural design and easy assembly and production.

Claims

1. A torque wrench, comprising: the method comprises the following steps:

when the switching piece is positioned at the release position, each positioning piece is not combined with the annular tooth part for positioning, and the rotating wheel can rotate relative to the body; when the switching piece is positioned at the locking position, each positioning piece is combined with the annular tooth part for positioning, and the rotating wheel cannot rotate relative to the body;

each positioning piece can be arranged on the rotating wheel in a swinging manner by taking a pivot as an axis, the pivot is perpendicular to an axis line of the sleeve, two ends of each positioning piece are respectively provided with an engagement part and an actuating part, the engagement part is selectively engaged with the annular tooth part, and part of the switching piece can selectively abut against the actuating part so as to enable the actuating part to have a tendency of moving towards a specific direction; when the switch member is located at the release position, each actuating part moves towards the direction away from the axis of the sleeve, and when the switch member is located at the locking position, each actuating part moves towards the direction close to the axis of the sleeve.

2. The torque wrench of claim 1, wherein: the switching piece is rotatably arranged on the rotating wheel and comprises at least one control mechanism, the at least one control mechanism respectively corresponds to at least one positioning piece, each control mechanism comprises a sliding chute, a first jacking piece and a second jacking piece, the actuating part is accommodated in the sliding chute, the first jacking piece and the second jacking piece protrude out of two opposite sides of the sliding chute, and in the radial direction of the sleeve, the first jacking piece is closer to the axial lead of the sleeve than the second jacking piece; when the switching piece is positioned at the release position, the first ejecting piece abuts against the actuating part to move towards the direction away from the axis of the sleeve, and when the switching piece is positioned at the locking position, the second ejecting piece presses against the actuating part to move towards the direction close to the axis of the sleeve.

3. The torque wrench of claim 2, wherein: the opposite sides of the first top piece and the second top piece are respectively provided with a smooth guide surface, and the actuating part can move along the smooth guide surfaces so as to keep mutual abutting relation with the first top piece or the second top piece in the radial direction of the sleeve.

4. The torque wrench of claim 1, wherein: the tripping mechanism comprises a linkage plate and two rolling pieces, the transmission rod and the pushing component are respectively connected with two ends of the linkage plate to form a connecting rod mechanism, the two rolling pieces are pivoted on the pushing component and roll against the inner wall of the sleeve, when the force application reaches a preset torsion value, a knocking part of the transmission rod can knock the inner wall of the sleeve, and then the linkage plate drives the pushing component to move backwards to extrude the elastic piece; wherein, the two rolling pieces and the inner wall of the sleeve are positioned at the same side where the knocking part knocks.

5. The torque wrench of claim 1, wherein: the torsion force transmission mechanism also comprises a torsion force display tube which rotates synchronously with the pressure rod, the torsion force display tube is provided with a plurality of scales, the torsion force display tube is positioned in the sleeve and is opposite to the body, and the sleeve and the body are respectively provided with a through hole corresponding to the plurality of scales.

6. The torque wrench of claim 5, wherein: the pressure lever comprises a threaded section and a sleeving section which are connected, the torsion display barrel is sleeved on the sleeving section and is fixed on the sleeving section by at least one positioning component, each positioning component comprises a countersunk head screw and a positioning block, the positioning block is arranged between the pressure lever and the countersunk head screw, the torsion transmission mechanism further comprises a screw hole barrel combined with the threaded section, and the screw hole barrel is fixedly arranged on the sleeve; at least one through hole is arranged at the position of the sleeve corresponding to the at least one positioning component, and a tool is inserted into each through hole to unscrew or screw the countersunk head screw.

7. The torque wrench of claim 1, wherein: the torsion force transmission mechanism further comprises a transmission assembly positioned between the end face of the pressure lever and the elastic piece, the transmission assembly comprises a spring gasket contacted with the elastic piece and a rolling body, and the rolling body is arranged between the end face of the pressure lever and the spring gasket.

8. The torque wrench of claim 3, wherein: the sleeve, the rotating wheel and the switching piece are coaxially and concentrically arranged; the tripping mechanism comprises a linkage plate and two rolling pieces, the transmission rod and the pushing component are respectively connected with two ends of the linkage plate to form a connecting rod mechanism, the two rolling pieces are pivoted on the pushing component and roll against the inner wall of the sleeve, when the force application reaches a preset torsion value, a knocking part of the transmission rod can knock the inner wall of the sleeve, and then the linkage plate drives the pushing component to move backwards to extrude the elastic piece; wherein, the two rolling pieces and the inner wall of the sleeve are positioned at the same side where the knocking part knocks the inner wall of the sleeve; the torsion force transmission mechanism also comprises a torsion force display cylinder which synchronously rotates with the pressure rod, the torsion force display cylinder is provided with a plurality of scales, the torsion force display cylinder is positioned in the sleeve and is opposite to the body, and the sleeve and the body are respectively provided with a through hole corresponding to the plurality of scales; the torque force transmission mechanism also comprises a transmission assembly positioned between the end surface of the pressure lever and the elastic piece, the transmission assembly comprises a spring gasket contacted with the elastic piece and a rolling body, and the rolling body is arranged between the end surface of the pressure lever and the spring gasket; the pressure lever comprises a thread section and a sleeving section which are connected, the torsion display barrel is sleeved on the sleeving section and is fixed on the sleeving section by at least one positioning component, each positioning component comprises a countersunk head screw and a positioning block, the positioning block is arranged between the pressure lever and the countersunk head screw, the torsion transmission mechanism further comprises a screw hole barrel combined with the thread section, and the screw hole barrel is fixedly arranged on the sleeve; at least one through hole is arranged at the position of the sleeve corresponding to the at least one positioning component, and a tool is inserted into each through hole to unscrew or screw the countersunk head screw; the number of the at least one control mechanism is equal to that of the at least one positioning piece, the number of the at least one positioning piece is two, and the at least one positioning piece is arranged in an axisymmetrical mode by taking the shaft axis as an axis; the pushing component also comprises a pushing piece, a holding piece and a spring thimble, the pushing piece and the transmission rod are respectively pivoted at two ends of the linkage plate, the two rolling pieces are pivoted at the pushing piece, the pushing piece penetrates through the holding piece and is inserted into the spring thimble to form a whole, and the spring thimble is sleeved at one end of the elastic piece; a magnifying lens arranged in the through hole for magnifying the scale for external viewing; the rolling member is selected from any one of a ball, a roller, and a disk.