CN215470819U - Auxiliary force arm of torque gun - Google Patents

Abstract

The utility model discloses an auxiliary force arm of a torque gun, belonging to the field of auxiliary force arms and comprising a middle connecting component positioned in the middle, and a fixing component and a clamping component connected at two ends of the middle connecting component, wherein the fixing component and the clamping component are respectively rotatably connected with two ends of the middle connecting component, the middle connecting component has an extension length, the auxiliary force arm is fixed on an external bracket through the fixing component, the torque gun is clamped in the clamping component for fixing, the auxiliary force arm can fix the torque gun, the torque force of the torque gun can not act on the hand of an operator, the operator can directly hold the torque gun for use, the torque gun clamped on the clamping component can swing up and down in the vertical direction and can keep the torque gun vertical, the operator can operate the torque gun to swing down to provide torque force for a workpiece and can also operate the torque gun to swing up to be far away from the workpiece, and the operation of the operator is convenient, the auxiliary force arm is simple in structure, convenient to use and suitable for fixing the pneumatic torque gun and the electric torque gun.

Description

Auxiliary force arm of torque gun

Technical Field

The utility model relates to the field of auxiliary force arms, in particular to an auxiliary force arm of a torque gun.

Background

At present, a torque gun is often used in the production process of products, for example, to screw a screw by the torque gun, and the torque gun provides a rotating force to the screw to screw the screw. Most of screws on the existing new product are installed through manual operation, workers install the screws through a manual screwdriver, the screws are screwed through manually rotating the screwdriver, and the efficiency of manually screwing the screws is low;

therefore, the screw is installed by using the torque gun instead, so that the efficiency is improved, a worker holds the torque gun by a hand, presses the screw down, and the torque gun provides torque to screw the screw. The torque gun comprises an electric torque gun and a pneumatic torque gun, wherein different torque guns have different torque forces in different working states, but when the torque force of the torque gun is too large, the torque gun is directly held by the hand of an operator, and the torque force of the torque gun acts on the held hand, so that the hand cannot hold the torque gun for use.

Disclosure of Invention

The utility model aims to provide an auxiliary force arm of a torque gun.

The technical scheme of the utility model is as follows: the auxiliary force arm of the torque gun is characterized by comprising a fixing component, a torque gun driving component and a torque gun driving component, wherein the fixing component is used for being connected with an external bracket so as to fix the auxiliary force arm on the external bracket;

the clamping assembly is used for clamping and fixing the torque gun;

the middle connecting assembly is provided with an extending length, two ends of the middle connecting assembly are respectively connected with the fixing assembly and the clamping assembly in a rotating mode, the torque gun clamped on the clamping assembly can swing up and down in the vertical direction, and the torque gun can be kept vertical.

The further optimization scheme of the utility model is as follows: the rotation center of the fixed component is horizontally arranged.

The further optimization scheme of the utility model is as follows: the rotation center of the clamping assembly is horizontally arranged, and the center clamped by the clamping assembly is vertical to the rotation center of the clamping assembly.

The further optimization scheme of the utility model is as follows: the centre gripping subassembly is including deciding the clamp splice and moving the clamp splice, decide the clamp splice and rotate the one end of connecting at middle coupling assembling, move the clamp splice and be connected with deciding the clamp splice through the bolt, move the clamp splice and decide and have the clamp mouth that is used for centre gripping torque gun between the clamp splice, make the clamp mouth press from both sides tightly or loosen torque gun through the bolt of screwing or loosening the bolt soon.

The further optimization scheme of the utility model is as follows: the fixing assembly comprises a fixing piece and a connecting piece, the connecting piece is rotatably connected with one end of the middle connecting assembly, the fixing piece is rotatably connected onto the connecting piece, the torque gun clamped on the clamping assembly can swing back and forth in the horizontal direction around the rotating center of the fixing piece, and the auxiliary force arm is fixed on the external support through the fixing piece.

The further optimization scheme of the utility model is as follows: the rotation center of the fixing piece is perpendicular to the rotation center of the fixing component.

The further optimization scheme of the utility model is as follows: the length of the middle connecting component can be adjusted in a telescopic mode.

The further optimization scheme of the utility model is as follows: the middle connecting assembly comprises at least two sections of telescopic pipe bodies with different diameters, the diameters of the telescopic pipe bodies are reduced step by step, the upper-stage telescopic pipe body and the lower-stage telescopic pipe body are mutually sleeved together, and the upper-stage telescopic pipe body and the lower-stage telescopic pipe body move relatively along the axial direction to enable the middle connecting assembly to extend or shorten.

The further optimization scheme of the utility model is as follows: and a limiting component for limiting the telescopic pipe bodies to separate from each other is arranged between the upper-stage telescopic pipe body and the lower-stage telescopic pipe body.

The further optimization scheme of the utility model is as follows: the two ends of the middle connecting assembly are respectively sleeved with a sleeve-joint piece, the sleeve-joint pieces are fixed at the two ends of the middle connecting assembly, and the fixed assembly and the clamping assembly are respectively connected with the sleeve-joint pieces at the two ends in a rotating mode.

Compared with the prior art, the auxiliary force arm has the advantages that the auxiliary force arm is fixed on the external support through the fixing assembly, the torque gun is clamped and fixed in the clamping assembly, two ends of the middle connecting assembly are respectively and rotatably connected with the fixing assembly and the clamping assembly, the auxiliary force arm can fix the torque gun, so that the torque force of the torque gun cannot act on the hand of an operator, the operator can directly hold the torque gun by hand to use, the torque gun clamped on the clamping assembly can swing up and down in the vertical direction and can always keep the torque gun vertical, the operator can operate the torque gun to swing down to provide torque force for a workpiece and can also operate the torque gun to swing up to be far away from the workpiece, the operation and the use of the operator are convenient, the auxiliary force arm is simple in structure and convenient to use, and the auxiliary force arm is suitable for a pneumatic torque gun and an electric torque gun.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the background art and explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a schematic view of the structure of the present invention.

Fig. 3 is a state diagram when the present invention is rotated.

Fig. 4 is a use state diagram of the present invention.

Fig. 5 is a vertical sectional view of the present invention.

Fig. 6 is a cross-sectional view of the present invention.

Fig. 7 is an exploded view of the present invention.

Fig. 8 is a partially enlarged view of a portion a of fig. 5.

In the figure: 1. a fixing assembly; 2. a fixing member; 3. a contact surface; 4. fastening bolt holes; 5. a fourth bolt; 6. a third threaded hole; 7. a coupling member; 8. a socket; 9. a first bolt; 10. a first threaded hole; 11. an intermediate connection assembly; 12. a pin; 13. a third bolt; 14. a third bolt hole; 15. a connecting portion; 16. a clamping assembly; 17. fixing the clamping block; 18. a movable clamping block; 19. clamping the opening; 20. a second bolt; 21. a second bolt hole; 22. a second threaded hole; 23. a first clamping part; 24. a first clamping edge; 25. a first bolt hole; 26. a second clamping part; 27. a second clamping edge; 28. a nut; 29. a three-stage telescopic pipe body; 30. a secondary telescopic pipe body; 31. a primary telescopic pipe body; 32. a torque gun; 33. a center clamped by the clamping assembly; 34. a center of rotation of the clamping assembly; 35. a center of rotation of the stationary assembly; 36. a center of rotation of the fixture; 37. a fourth bolt hole; 38. a first perforation; 39. a second perforation; 40. a second plug connector; 41. second flanging; 42. a first connector; 43. a first flange.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the utility model.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside" and "outside" are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element which is referred to must have a specific orientation, be constructed in a specific orientation and operation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-8, the auxiliary force arm of the torque gun includes a middle connection assembly 11 located in the middle, and a fixing assembly 1 and a clamping assembly 16 connected to two ends of the middle connection assembly 11, wherein the fixing assembly 1 and the clamping assembly 16 are respectively rotatably connected to two ends of the middle connection assembly 11, and the middle connection assembly 11 has an extension length.

Further, the two ends of the middle connecting assembly 11 are respectively sleeved with a sleeve 8, the sleeve 8 is fixed at the two ends of the middle connecting assembly 11, and the fixed assembly 1 and the clamping assembly 16 are respectively connected with the sleeve 8 at the two ends in a rotating manner. The socket joint piece 8 can play a protective effect on the two ends of the middle connecting component 11, is convenient to replace after being damaged, and does not need to replace the whole middle connecting component 11.

The auxiliary force arm is fixed on the external bracket through the fixing component 1. The fixing assembly 1 comprises a fixing piece 2 and a connecting piece 7, wherein the fixing piece 2 is connected to the connecting piece 7.

As shown in fig. 3, 6 and 7, the coupling member 7 is rotatably connected to one end of the middle connecting member 11. The connecting piece 7 is provided with a first clamping part 23, the first clamping part 23 comprises two first clamping edges 24, a distance is arranged between the two first clamping edges 24 for the end part of the middle connecting assembly 11 to insert, the sleeve-connecting piece 8 sleeved on the end of the middle connecting assembly 11 is a tubular structure with a center penetrating, the sleeve-connecting piece 8 is sleeved on the outer side of the end part of the middle connecting assembly 11, the end part of the middle connecting assembly 11 is inserted between the two first clamping edges 24, a first bolt 9 is arranged for rotatably connecting the middle connecting assembly 11 and the connecting piece 7 together, further, the first bolt 9 comprises a middle polished rod, and a head part and a screw rod which are connected with the two ends of the polished rod, the diameter of the head part is larger than that of the middle polished rod, the side walls of the end parts of the sleeve-connecting piece 8 and the middle connecting assembly 11 are both provided with first through holes 38, the first through holes 38 on the sleeve-connecting piece 8 correspond to the first through holes 38 on the end part of the middle connecting assembly 11, one first clamping edge 24 of the first clamping portion 23 is provided with a first bolt hole 25, the other first clamping edge 24 of the first clamping portion 23 is provided with a first threaded hole 10, when the connecting piece 7 and the middle connecting assembly 11 need to be rotatably connected together, the end portion of the middle connecting assembly 11 is inserted between the two first clamping edges 24, so that the first through hole 38 corresponds to the first bolt hole 25 and the first threaded hole 10 on the front side and the rear side respectively, then the first bolt 9 sequentially passes through the first bolt hole 25, the middle connecting assembly 11 and the first through hole 38 on the sleeve connecting piece 8 and is inserted into the first threaded hole 10, the screw on the first bolt 9 is in threaded connection with the first threaded hole 10, the end portions of the sleeve connecting piece 8 and the middle connecting assembly 11 are sleeved on the polished rod of the first bolt 9, so that the connecting piece 7 is rotatably connected with one end of the middle connecting assembly 11. The socket 8 is tightly matched with the end part of the middle connecting component 11.

The auxiliary force arm is fixed on the external bracket through a fixing piece 2. The fixing part 2 is provided with a through fastening bolt hole 4, when the auxiliary force arm needs to be fixed on the external support, the fixing part 2 is attached to the external support, the fastening bolt penetrates through the fastening bolt hole 4 to be in threaded connection with the external support, and the fixing part 2 and the external support are fixed together to enable the auxiliary force arm to be fixed on the external support. The external support can be a wall in a factory or a frame in a processing workshop.

Furthermore, the contact surface 3 of the fixing part 2 in contact with the external bracket is a plane, so that the fixing part 2 can be conveniently and fixedly connected to the external bracket.

As shown in fig. 4, the clamping assembly 16 is used to clamp and secure the torque gun 32. The clamping assembly 16 comprises a fixed clamping block 17 and a movable clamping block 18, the fixed clamping block 17 is rotatably connected to one end of the middle connecting assembly 11, the movable clamping block 18 is connected with the fixed clamping block 17 through a second bolt 20, a clamping opening 19 used for clamping a torque gun 32 is formed between the movable clamping block 18 and the fixed clamping block 17, and the torque gun 32 is clamped or loosened by screwing the second bolt 20 or unscrewing the second bolt 20.

Preferably, the movable clamping block 18 and the fixed clamping block 17 are both bent into an arc shape, the movable clamping block 18 is provided with two second bolt holes 21, the two second bolt holes 21 are respectively arranged at the left side and the right side of the movable clamping block 18, the fixed clamping block 17 is provided with two second threaded holes 22 corresponding to the second bolt holes 21, the two second threaded holes 22 are respectively arranged at the left side and the right side of the fixed clamping block 17, a second bolt 20 penetrates through the second bolt hole 21 on the movable clamping block 18 and is in threaded connection with the second threaded hole 22 on the fixed clamping block 17, so that two ends of the movable clamping block 18 are connected with two ends of the fixed clamping block 17, a clamping opening 19 for clamping a torque gun 32 is formed between the movable clamping block 18 and the fixed clamping block 17, when the torque gun 32 needs to be clamped on the clamping assembly 16, the torque gun 32 is inserted into the clamping opening 19 between the movable clamping block 18 and the fixed clamping block 17, the second bolt 20 enables the fixed clamping block 17 and the movable clamping block 18 to clamp the torque, when the torque gun 32 in the clamping assembly 16 needs to be detached, the second bolt 20 is unscrewed outwards, the clamping opening 19 formed by the movable clamping block 18 and the fixed clamping block 17 is loosened, the movable clamping block 18 is moved outwards along the second bolt 20, the clamping opening 19 is enlarged, and then the torque gun 32 is taken out of the clamping assembly 16.

Decide the tail end of clamp splice 17 and be equipped with the connecting portion 15 that extends out, make it is the Y font to decide clamp splice 17, connecting portion 15 rotates with the one end of middle coupling assembling 11 to be connected. The end of the middle connecting assembly 11 is sleeved with a sleeve-connecting piece 8, the end of the middle connecting assembly 11 is inserted into the sleeve-connecting piece 8, a pin 12 is arranged to penetrate through the side walls of the middle connecting assembly 11 and the sleeve-connecting piece 8, so that the sleeve-connecting piece 8 is fixed on the end of the middle connecting assembly 11, the head of the sleeve-connecting piece 8 is provided with a second clamping part 26, the second clamping part 26 comprises two second clamping edges 27, a space is formed between the two second clamping edges 27 for the insertion of the connecting part 15, the connecting part 15 of the fixed clamping block 17 is inserted between the two second clamping edges 27, a third bolt 13 is arranged to rotatably connect the fixed clamping block 17 and the middle connecting assembly 11 together, further, the third bolt 13 comprises a middle polished rod, heads and screw rods, the heads and the screw rods are connected at two ends of the polished rod, the diameter of the heads is larger than that of the middle polished rod, the connecting part 15 is provided with a second perforation 39, and opposite third bolt holes 14 are arranged on the two second clamping edges 27, when the fixed clamping block 17 and the middle connecting assembly 11 need to be rotatably connected together, the connecting part 15 is inserted between the two second clamping edges 27, the second through holes 39 respectively correspond to the hole positions of the third bolt holes 14 on the front side and the rear side, then the third bolts 13 sequentially penetrate through the third bolt holes 14 on the two sides and the second through holes 39 in the middle to be connected with the nuts 28, the fixed clamping block 17 is rotatably connected to the sleeving part 8, and the fixed clamping block 17 is sleeved on the polished rod of the third bolts 13. The socket 8 is tightly matched with the middle connecting component 11.

The center of rotation 35 of the stationary assembly is horizontally disposed, and the torque gun 32 held in the clamping assembly 16 can swing up and down along the center of rotation 35 of the stationary assembly, so that an operator can operate the torque gun 32 to swing up and down in a vertical direction to approach or separate from a workpiece. The centre of rotation 35 of the fixed assembly is the centre of rotation of the coupling member 7 relative to the intermediate connection assembly 11.

The centre of rotation 34 of centre gripping subassembly and the centre of rotation 35 of fixed subassembly are parallel, the centre of rotation 34 level setting of centre gripping subassembly, centre of rotation 33 of centre gripping subassembly centre of gripping is perpendicular with centre of rotation 34 of centre gripping subassembly, and the torque gun 32 of centre gripping in centre gripping subassembly 16 can rotate along centre of rotation 34 of centre gripping subassembly, makes the torque gun 32 of centre gripping in centre gripping subassembly 16 keep the state of vertical all the time, is convenient for the operation workman to use torque gun 32. The rotation center 34 of the clamping assembly is the rotation center of the fixed clamping block 17 relative to the middle connecting assembly 11.

As shown in fig. 4, when the torque gun 32 needs to be used, the fixing member 2 is fixedly connected to the external bracket through the fastening bolt, so that the auxiliary force arm is fixed to the external bracket, the torque gun 32 is then clamped in the clamping opening 19 of the clamping assembly 16 to be fixed, an operator holds the torque gun 32 to use, the auxiliary force arm is used for fixing the torque gun 32, the torque of the torque gun 32 does not act on the hand of the operator, the operator can directly hold the torque gun 32 to operate, the torque gun 32 clamped on the clamping assembly 16 can swing up and down in the vertical direction, the operator can control the torque gun 32 to swing down to be close to a workpiece to provide torque to the workpiece, and can control the torque gun 32 to swing up to be far away from the workpiece, so that the auxiliary force arm can be used for fixing the electric torque gun 32 and the pneumatic torque gun 32.

As shown in fig. 5, the fixing member 2 is rotatably connected to the coupling member 7 so that the torque gun 32 clamped to the clamping unit 16 can swing back and forth in a horizontal direction about a rotation center 36 of the fixing member, preferably, the rotation center 36 of the fixing member is vertically disposed, and the rotation center 36 of the fixing member is perpendicular to a rotation center 35 of the fixing unit. The connecting piece 7 is provided with a through fourth bolt hole 37, the fixing piece 2 is provided with a through third threaded hole 6, a fourth bolt 5 is arranged to penetrate through the fourth bolt hole 37 to be in threaded connection with the third threaded hole 6 on the fixing piece 2, the fixing piece 2 and the connecting piece 7 are connected together in a rotating mode, the connecting piece 7 is sleeved on a polished rod of the fourth bolt 5, an operator can operate the torque gun 32 to swing in the horizontal direction, the torque gun 32 can swing up and down in the vertical direction and can also swing back and forth in the horizontal direction, and the operation flexibility is higher. The aperture extension direction of the third threaded hole 6 is perpendicular to the aperture extension direction of the fastening bolt hole 4.

As shown in fig. 5 and 8, the length of the middle connecting component 11 can be telescopically adjusted, and when the position needing to be operated is far or close, an operator can extend or shorten the middle connecting component 11, so that the torque gun 32 can reach the position needing to be operated without repeatedly installing an auxiliary force arm.

Middle coupling assembling 11 includes the flexible body of two sections at least different diameters, and the diameter of flexible body reduces step by step, and the flexible body of last one-level cup joints together and can relative activity with the flexible body of next stage each other, and the flexible body of last one-level and the flexible body of next stage make middle coupling assembling 11 extend or shorten along axial relative movement.

Furthermore, a limiting component for limiting the telescopic pipe bodies to separate from each other is arranged between the upper-stage telescopic pipe body and the lower-stage telescopic pipe body. The limiting assembly comprises a first plug connector 42 and a second plug connector 40 which are matched with each other, the first plug connector 42 is connected with one end of the upper-stage telescopic pipe body in an inserting mode, the lower-stage telescopic pipe body penetrates through the first plug connector 42 to be inserted into the upper-stage telescopic pipe body, the second plug connector 40 is connected with the inserting end of the lower-stage telescopic pipe body in an inserting mode, the second plug connector 40 is provided with a second flanging 41, when the two telescopic pipe bodies move towards two sides relatively, the second flanging 41 can support to limit the two telescopic pipe bodies on the first plug connector 42 to be separated from each other, a first flanging 43 is arranged on the first plug connector 42, and the first flanging 43 supports to limit the first plug connector 42 to continue to move into the upper-stage telescopic pipe body on the pipe orifice edge of the upper-stage telescopic pipe body. The first plug connector 42 is closely matched and plugged with the upper stage telescopic pipe body, and the second plug connector 40 is closely matched and plugged with the lower stage telescopic pipe body 31.

Preferably, the number of the telescopic pipes is three, and the telescopic pipes are respectively a first-stage telescopic pipe 31, a second-stage telescopic pipe 30 and a third-stage telescopic pipe 29, the diameters of the first-stage telescopic pipe 31, the second-stage telescopic pipe 30 and the third-stage telescopic pipe 29 are gradually reduced from left to right, and adjacent telescopic pipes are mutually sleeved. The end parts of the telescopic pipe bodies on the two sides are sleeved with sleeving pieces 8.

The torque gun 32 may be connected to an electrical conductor wound in a spiral shape, the electrical conductor having elasticity, and the spiral-shaped electrical conductor being capable of elastically extending or contracting, the electrical conductor serving as a pulling member for the torque gun 32. The torque gun 32 is a commercially available product, such as a pneumatic screwdriver made by crown and model TG-12H.

Preferably, the center 33 of the clamping assembly is coaxial with the axis of the torque gun 32.

The torque gun auxiliary force arm provided by the utility model is described in detail, the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the examples is only used for helping to understand the utility model and the core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. An auxiliary force arm of the torque gun is characterized in that the auxiliary force arm comprises

The fixing component is used for connecting with the external bracket to fix the auxiliary force arm on the external bracket;

the clamping assembly is used for clamping and fixing the torque gun;

the middle connecting assembly is provided with an extending length, two ends of the middle connecting assembly are respectively connected with the fixing assembly and the clamping assembly in a rotating mode, the torque gun clamped on the clamping assembly can swing up and down in the vertical direction, and the torque gun can be kept vertical.

2. The torque gun auxiliary force arm according to claim 1, wherein the centre of rotation of the securing assembly is disposed horizontally.

3. The torque gun auxiliary force arm according to claim 1 or 2, wherein the centre of rotation of the gripping assembly is arranged horizontally and the centre of gripping of the gripping assembly is perpendicular to the centre of rotation of the gripping assembly.

4. The auxiliary force arm of the torque gun according to claim 1, wherein the clamping assembly comprises a fixed clamping block and a movable clamping block, the fixed clamping block is rotatably connected to one end of the middle connecting assembly, the movable clamping block is connected with the fixed clamping block through a bolt, a clamping opening for clamping the torque gun is arranged between the movable clamping block and the fixed clamping block, and the clamping opening clamps or loosens the torque gun by screwing or unscrewing the bolt.

5. The auxiliary force arm of the torque gun according to claim 1, wherein the fixing assembly comprises a fixing member and a coupling member, the coupling member is rotatably connected to one end of the intermediate connection assembly, the fixing member is rotatably connected to the coupling member so that the torque gun clamped to the clamping assembly can swing back and forth in a horizontal direction around a rotation center of the fixing member, and the auxiliary force arm is fixed to the outer bracket through the fixing member.

6. The torque gun auxiliary force arm according to claim 5, wherein the centre of rotation of the fixing member is perpendicular to the centre of rotation of the fixing assembly.

7. The torque gun auxiliary force arm according to claim 1, wherein the length of the intermediate connection assembly is telescopically adjustable.

8. The auxiliary force arm of the torque gun according to claim 7, wherein the intermediate connection member comprises at least two telescopic tubes with different diameters, the diameters of the telescopic tubes are gradually reduced, the upper telescopic tube and the lower telescopic tube are sleeved together, and the upper telescopic tube and the lower telescopic tube move relatively to each other along the axial direction to extend or shorten the intermediate connection member.

9. The auxiliary force arm of the torque gun according to claim 8, wherein a limiting member is disposed between the upper stage telescopic tube and the lower stage telescopic tube for limiting the telescopic tubes from separating from each other.

10. The auxiliary force arm of the torque gun according to claim 1, wherein two ends of the middle connection assembly are respectively sleeved with a sleeve, the sleeves are fixed on two ends of the middle connection assembly, and the fixing assembly and the clamping assembly are respectively rotatably connected with the sleeves at two ends.

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