CN217046193U

CN217046193U - Counter-force arm and torque wrench

Info

Publication number: CN217046193U
Application number: CN202220695362.7U
Authority: CN
Inventors: 张挺
Original assignee: Shanghai Huxiao Electric Implements Co ltd
Current assignee: Shanghai Huxiao Electric Implements Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-26
Anticipated expiration: 2032-03-29

Abstract

The utility model discloses a counter-force arm and a torque wrench, which are provided with a mounting section, a middle section and a plurality of extension arms which are connected with each other; be provided with the connecting block on interlude and the extension arm respectively, and be equipped with the spread groove that corresponds on the extension arm, the groove depth of spread groove sets up to the thickness that is less than the extension arm. The adjustment of the whole length of the counter force arm can be realized through the connection of a plurality of extension arms, so that application scenes with different length requirements can be met; simultaneously, form a stable connection structure by the cooperation of being connected between connecting block and the spread groove, and set up the connecting block into the bilateral symmetry structure along the vertical face of reaction arm extending direction, the spread groove also corresponds with it, make no matter on the extension arm is installed to the up end of connecting block or the lower terminal surface, its extending direction is same direction, thereby make the holistic extending direction of extension arm be located same straight line, guarantee its mechanical properties stable, it is few to have solved current reaction arm of force application scene, be difficult to satisfy actual demand's problem.

Description

Counterforce arm and torque wrench

Technical Field

The utility model belongs to the technical field of the spanner, especially, relate to a counter-force arm and torque wrench.

Background

An electric constant torque wrench is generally used in a place where a bolt (nut) is attached and detached with a relatively large torque and where a torque accuracy requirement is high. The existing electric torque wrench usually controls a torque value according to the working current value change of a motor in the bolt tightening process by an intelligent controller, and when the torque value reaches a preset value, the motor stops working to realize the required torque value. The electric torque wrench mainly comprises a mechanical part consisting of a reduction gearbox, a reaction arm, a sleeve, an internal shaft, a gear and the like, an electromechanical part consisting of a machine body, a handle, a switch, a cable sheath, a driving motor and the like, and an electronic intelligent part consisting of an intelligent controller.

When the electric torque wrench works, the sleeve sleeves a bolt which needs to be loosened or tightened, the reaction arm is supported on the adjacent bolt, the switch is pressed to drive the motor to rotate, the sleeve is driven to rotate clockwise or anticlockwise through the transmission of the mechanical part, and the loosening or tightening of the bolt is realized under the action of the reaction arm and the supporting point.

When the whole machine leaves a factory, a conventional reaction arm is arranged. However, the reaction arm often has the problems of insufficient length or overlong length, and the application scenes are few, so that the practical application requirements of construction are difficult to meet.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a counter-force arm and torque wrench to it is few to solve current counter-force arm application scene, is difficult to satisfy actual demand's problem.

In order to solve the above problem, the technical scheme of the utility model is that:

the utility model discloses a counter-force arm, include:

the mounting section is provided with a connecting structure connected to an external torque wrench;

the first end of the middle section is connected to the mounting section, and the second end of the middle section is provided with a connecting block;

the first end of the extension arm is provided with a connecting groove used for detachably connecting the connecting block, and the connecting block is matched with the connecting groove in shape; the second end of the extension arm is provided with the connecting block and is used for abutting against an external adjacent bolt or being detachably connected with the adjacent extension arm;

each extension arm is respectively installed on the upper end surface or the lower end surface of the corresponding connecting block through the connecting groove;

the connecting block is attached to the inner wall surface of the connecting groove and forms a stable connecting structure; the connecting blocks are symmetrical structures on two sides of a vertical surface where the reaction arm extends.

The utility model discloses a counter-force arm, the connecting block with be equipped with a set of connecting hole that corresponds on the internal face of spread groove at least, the connecting block with the spread groove passes through fastening bolt the connection hole is realized dismantling the connection.

In the counter-force arm of the utility model, the connecting block is in the shape of an isosceles polygon, and the height of the isosceles polygon is the extending direction of the counter-force arm;

the connecting groove is an isosceles polygonal groove corresponding to the connecting block.

The utility model discloses a torque wrench, the degree of depth of spread groove is less than the thickness of extension arm.

The utility model discloses a torque wrench, the degree of depth of spread groove does half of the thickness of extension arm.

The utility model discloses a torque wrench, the mounting section, the middle section and the connecting block positioned at the second end of the middle section are integrally formed; the extension arm and the corresponding connecting block are integrally formed.

The utility model discloses a torque wrench, be equipped with the fretwork on the extension arm and subtract heavy structure.

The utility model discloses a torque wrench, connection structure is a collar, be equipped with on the internal face of collar and be used for installing extremely torque wrench's mounting hole.

The utility model discloses a torque wrench, including above-mentioned arbitrary one the reaction arm.

The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:

1. the utility model has the advantages that the torque wrench reaction arm is arranged as the connected installation section, the middle section and the plurality of extension arms; wherein, be provided with the connecting block on interlude and the extension arm respectively, and be equipped with the spread groove that corresponds on the extension arm, the groove depth of spread groove sets up to the thickness that is less than the extension arm, and extension arm accessible spread groove installs to the up end or the lower terminal surface that correspond the connecting block. The adjustment of the whole length of the counter force arm can be realized through the connection of a plurality of extension arms, so that application scenes with different length requirements can be met; simultaneously, form a stable connection structure by the cooperation of being connected between connecting block and the spread groove, and set up the connecting block into the bilateral symmetry structure along the vertical face of reaction arm extending direction, the spread groove also corresponds with it, make no matter on the extension arm is installed to the up end of connecting block or the lower terminal surface, its extending direction is same direction, thereby make the holistic extending direction of extension arm be located same straight line, guarantee its mechanical properties stable, it is few to have solved current reaction arm of force application scene, be difficult to satisfy actual demand's problem.

2. The utility model discloses an embodiment utilizes the part that extension arm thickness surpasss the spread groove depth, is connected to the up end or the lower terminal surface that corresponds the connecting block respectively through a plurality of extension arms, or is connected to the up end and the lower terminal surface of connecting block respectively to the height of the extension arm that can control to be located the end relative to interlude or torque wrench, in order to adapt to adjacent bolt and to wait to twist the difference in height of bolt; therefore, the reaction arm of the embodiment can adapt to different distances and different height differences between the bolt to be screwed and the adjacent bolt, the applicable scenes are greatly increased, and the problems that the existing reaction arm is few in application scenes and difficult to meet actual requirements are further solved.

Drawings

FIG. 1 is a schematic view of an embodiment of a reaction arm of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the reaction arm of the present invention;

FIG. 3 is a schematic view of another embodiment of the reaction arm of the present invention;

FIG. 4 is a schematic view of another embodiment of the reaction arm of the present invention;

fig. 5 is a cross-sectional view of the connection between the connecting block of the reaction arm and the extension arm of the present invention;

fig. 6 is a schematic view of the torque wrench of the present invention;

fig. 7 is another schematic view of the torque wrench of the present invention.

Description of the reference numerals: 1: a torque wrench; 2: a sleeve; 3: an installation section; 301: mounting holes; 4: a middle section; 5: an extension arm; 501: a hollow weight reduction structure; 6: a bolt is to be screwed; 7: adjacent bolts; 8: connecting blocks; 9: fastening a bolt; 10: connecting grooves; 11: and connecting the holes.

Detailed Description

The reaction arm and the torque wrench according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims.

Referring to fig. 3-5, in one embodiment, a reaction arm includes a mounting section 3, an intermediate section 4, and a number of extension arms 5. The mounting section 3 is provided with a connection for connection to the external torque wrench 1. The first end of interlude 4 is connected in installation section 3, and the second end of interlude 4 is equipped with a connecting block 8.

The first end of the extension arm 5 is provided with a connecting groove 10 for detachably connecting the connecting block 8, and the connecting block 8 is matched with the connecting groove 10 in shape. The second end of extension arm 5 is provided with a connection block 8 for abutting an adjacent external bolt or being detachably connected to an adjacent extension arm 5. Each extension arm 5 is respectively installed on the upper end surface or the lower end surface of the corresponding connecting block 8 through a connecting groove 10. Under the connection state, the extension arm 5 is respectively installed to the upper end surface or the lower end surface of the corresponding connection block 8 so as to change the height difference of the extension arm 5 far away from the tail end of one side of the external installation section 3 relative to the installation section 3.

In practical application, when the maximum extension end of the counterforce arm and the adjacent nut lack the required length, the practical use requirement of construction cannot be met; when the length of the main arm of the reaction arm exceeds the surplus length of the actual space, the surplus length (without touching the inner side wall of a structural part) needs to be cut off to meet the use condition, and the problems are that during field construction, the distribution of the distances of all bolts is large, the main arms with various lengths and specifications need to be matched, and the defects of high use cost, heavy accumulated weight, trouble in carrying, inconvenience in management and the like are caused. And this embodiment can realize the regulation of the whole length of reaction arm through the connection of a plurality of extension arms 5 for can satisfy the applied scene of different length demands, only need carry a plurality of extension arms 5 can, it is few to have solved current reaction arm applied scene, is difficult to satisfy the problem of actual demand.

Simultaneously, through setting up assorted connecting block 8 and spread groove 10, the cooperation forms stable connection structure, realizes that relative position between the two is fixed promptly by the laminating of the inside wall of the lateral wall of connecting block 8 and spread groove 10 to but bearing capacity's transmission. And the connecting block 8 is arranged to be a bilateral symmetry structure along the vertical surface of the extension direction of the counterforce arm. And the shape of connecting groove 10 also with connecting block 8 phase-match to no matter make no matter on extension arm 5 installs the up end or the lower terminal surface to connecting block 8, its extending direction is same direction, thereby makes the holistic extending direction of extension arm 5 be located same straight line, guarantees that its mechanical transmission performance is stable.

Referring to fig. 1 to 5, the specific structure of the torque handle of the present embodiment is further described below:

as shown in fig. 5, in the present embodiment, at least one set of corresponding connection holes 11 is provided on the inner wall surfaces of the connection block 8 and the connection groove 10, and the connection block 8 and the connection groove 10 are detachably connected by fastening bolts 9 passing through the connection holes 11. In this embodiment, two sets of corresponding connection holes 11 are specifically adopted, and the fixed connection between one extension arm 5 and the corresponding connection block 8 is realized through two fastening bolts 9, and in other embodiments, the number of the extension arms can be determined according to specific requirements, which is not specifically limited herein.

Preferably, the arrangement direction of the plurality of sets of connecting holes 11 is the extending direction of the whole reaction arm, so that the fixing between the connecting block 8 and the extending arm 5 is more stable.

Further, the shape of the connecting block 8 may be an isosceles polygon, and the height of the isosceles polygon is the extending direction of the reaction arm. The connecting groove 10 may also be an isosceles polygonal groove corresponding to the connecting block 8.

In particular, the connecting block 8 may be an isosceles trapezoid, i.e. an isosceles trapezoid, the long side of which is connected to the second end of the middle section 4, and the short side of which is used to be inserted into the corresponding connecting groove 10.

And the shape of spread groove 10 also is isosceles trapezoid, an isosceles trapezoid groove promptly, and the long limit in isosceles trapezoid groove is located the terminal surface department of 5 first ends of extension arm promptly to establish into hollow out construction, can follow the terminal surface disect insertion isosceles trapezoid inslot of 5 first ends of extension arm.

In this embodiment, the depth of the connecting groove 10 may be made smaller than the thickness of the extension arm 5. In practical application, when the bolt 6 to be screwed and the adjacent bolt 7 are not on the same plane, the existing reaction arm often cannot meet the actual use requirement of construction, or the special-shaped reaction arms with various specifications are required to be carried to meet different height difference requirements, so that the defects of high use cost, heavy accumulated weight, troublesome carrying, inconvenient management and the like are caused. In the embodiment, the portions of the extension arms 5 whose thickness exceeds the groove depth of the connection grooves 10 are respectively connected to the upper end surface or the lower end surface of the corresponding connection block 8 or respectively connected to the upper end surface and the lower end surface of the connection block 8 through the plurality of extension arms 5, so that the height of the extension arm 5 located at the tail end relative to the middle section 4 or the middle section 4 can be controlled to adapt to the height difference of the adjacent bolt 7 relative to the bolt 6 to be screwed. So that the counterforce arm of the embodiment can adapt to different distances and different height differences between the bolt 6 to be screwed and the adjacent bolt 7, and the applicable scenes are greatly increased.

Further, the depth of the connecting groove 10 is half the thickness of the extension arm 5. Thereby make when the height of required terminal linking arm and the height of the second end of interlude 4 the same, through setting up even number extension arm 5, half-coupling to corresponds the up end of connecting block 8, half-coupling to corresponds the lower terminal surface of connecting block 8 and can realize, the combination between the extension piece of being more convenient for.

Of course, in other embodiments, the depth of the connecting groove 10 can be set to be one third of the thickness of the extending arm 5 or other values according to the requirement, and is not limited in detail herein.

For example, as shown in fig. 1, two extension arms 5 may be provided to be respectively installed at the upper end surface and the lower end surface of the corresponding connection block 8, so that the height of the extension arm 5 at the end does not change. As shown in fig. 2, two extension arms 5 can be provided and are installed on the upper end surface of the corresponding connection block 8, and since the groove depth of the connection groove 10 is half of the thickness of the extension arm 5, the height of the extension arm 5 is increased by the terminal extension arm 5 relative to the second end of the middle section 4. As shown in fig. 3, two extension arms 5 are provided and installed on the lower end surface of the corresponding connection block 8, and since the groove depth of the connection groove 10 is half of the thickness of the extension arm 5, the height of the end extension arm 5 relative to the second end of the middle section 4 is reduced by the thickness of one extension arm 5.

In this embodiment, the mounting section 3, the intermediate section 4 and the connecting piece 8 at the second end of the intermediate section 4 may be provided as an integral part. The extension arm 5 and the corresponding connecting piece 8 can likewise be designed as an integral part.

Further, under the condition of keeping the mechanical property of extension arm 5, can set up fretwork on extension arm 5 and subtract heavy structure 501 to make the weight of extension arm 5 reduce, portable more. Specifically, the periphery of the coupling hole 11 provided on the extension arm 5 may be opened, and the extension arm 5 is located at the rear portion of the coupling groove 10.

In this embodiment, the connection structure is a mounting ring, the inner wall surface of the mounting ring is provided with a mounting hole 301 for mounting to the external torque wrench 1, and the connection with the torque wrench 1 can be realized through a spline in the mounting hole 301.

The following describes a specific application of the reaction arm of the present embodiment:

in current practical application scene, for example quartering hammer installation scene, wait to twist bolt and adjoin the interval between the bolt great, and not all on the coplanar, the counter force arm length that conventional torque wrench joined in marriage is shorter, and a sleeve pipe is established through the cover on conventional counter force arm to current mode, and fixed connection between sleeve pipe and the conventional counter force arm is realized to the mode of rethread drilling cooperation bolt, and rethread sleeve pipe goes to butt and adjoins the bolt. And this connection does not match the situation where the two bolts are not in the same plane. Further, a scene with a larger distance between two bolts or a scene with different heights often occurs in the assembly stage of the vehicle chassis installation, the engine block installation or the electric drive assembly.

The reaction arm adopted by the embodiment comprises the mounting section 3, the middle section 4 and the extension arms 5, the length can be changed by overlapping the extension arms 5, and the height of the bolt to be screwed can be changed. For example, when the length is short, the extension can be performed by sequentially stacking a plurality of extension arms 5 up and down; and when length and height all can't satisfy, accessible a plurality of extension arms 5 upwards superpose in proper order or the mode of superpose downwards, obtain the change of length and height simultaneously, the scene of adaptation is more wider.

Example two

Referring to fig. 6 and 7, this embodiment provides a torque wrench with a reaction arm as in the first embodiment. The torque wrench 1 may include an electric host, a reaction arm base, a socket 2, a torque adjusting module, and the like. The reaction arm base is provided at the fixed end of the motor-driven main unit and is used for being splined to the mounting hole 301. The sleeve 2 is arranged at the output end of the electric host and is used for being sleeved on the bolt 6 to be screwed to screw or unscrew the bolt. The torque adjusting module is arranged on the electric host and used for adjusting the output torque of the sleeve 2.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments. Even if various changes are made in the present invention, if such changes fall within the scope of the claims and their equivalents, they are still within the scope of the present invention.

Claims

1. A reaction arm, comprising:

the first end of the extension arm is provided with a connecting groove used for detachably connecting the connecting block, and the connecting block is matched with the connecting groove in shape; the second end of the extension arm is provided with the connecting block which is used for abutting against an external adjacent bolt or being detachably connected with the adjacent extension arm;

the connecting block is attached to the inner wall surface of the connecting groove and forms a stable connecting structure; the connecting blocks are of symmetrical structures on two sides of a vertical surface where the reaction arm extends.

2. The reaction arm as claimed in claim 1, wherein at least one set of corresponding connecting holes is formed in the inner wall surfaces of the connecting block and the connecting groove, and the connecting block and the connecting groove are detachably connected by passing a fastening bolt through the connecting holes.

3. The reaction arm of claim 1 wherein the connecting block is shaped as an isosceles polygon, the height of which is the direction of extension of the reaction arm;

4. The reaction arm of claim 1 wherein the depth of the attachment slot is less than the thickness of the extension arm.

5. A reaction arm as claimed in claim 4 wherein the depth of the attachment slot is half the thickness of the extension arm.

6. The reaction arm of claim 1 wherein the mounting section, intermediate section and the connecting block at the second end of the intermediate section are integrally formed; the extension arm and the corresponding connecting block are integrally formed.

7. The reaction arm of claim 1 wherein the extension arm has a hollowed-out weight-reducing structure.

8. The reaction arm as in claim 1 wherein the attachment structure is a mounting ring having a mounting hole in an inner wall surface for mounting to the torque wrench.

9. A torque wrench comprising a reaction arm according to any one of claims 1 to 8.