CN219189113U - Clamp and production line - Google Patents

Abstract

The embodiment of the utility model discloses a clamp and a production line, wherein the clamp comprises a support frame, a first limit module, a second limit module, a third limit module and a fourth limit module, wherein the support frame is provided with a first bearing part and a second bearing part, the first bearing part and the second bearing part are both arranged on the support frame, and the first bearing part and the second bearing part are commonly used for bearing a headstock shell; the first limiting module is arranged on the first side surface of the support frame; the second limiting module is arranged on the second side surface of the support frame; the third limit module is arranged on the third side surface of the support frame; the fourth spacing module sets up in the fourth side of support frame, and first spacing module, the spacing module of second, the spacing module of third and the spacing module of fourth encircle the support frame jointly, and first spacing module, the spacing module of second, the spacing module of third and the spacing module of fourth are used for spacing the locomotive shell jointly. Through the mode, the risk of deformation of the automobile head shell during welding can be reduced.

Description

Clamp and production line

Technical Field

The embodiment of the utility model relates to the technical field of automobile manufacturing, in particular to a clamp and a production line.

Background

The existing automobile head shell is generally formed by welding and fixing a plurality of stamping formed plates, and usually, a plurality of plates are spliced together and then are directly welded and fixed.

In the implementation process of the embodiment of the utility model, the inventor finds that: the mode of directly carrying out the welding after splice together the polylith panel, the position relatively fixed between each panel is hardly kept in the welding process, causes the condition of locomotive shell deformation easily during the welding.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present utility model is to provide a fixture and a production line, which can overcome or at least partially solve the above-mentioned problems.

In order to solve the technical problems, one technical scheme adopted by the embodiment of the utility model is as follows: the fixture comprises a supporting frame, a first limiting module, a second limiting module, a third limiting module and a fourth limiting module. The support frame is provided with a first bearing part and a second bearing part, the first bearing part and the second bearing part are both arranged at the top of the support frame, and the first bearing part and the second bearing part are commonly used for bearing the headstock shell; the first limiting module is arranged on the first side face of the supporting frame; the second limiting module is arranged on a second side face of the support frame, the first side face is opposite to the second side face, the first limiting module is opposite to the second limiting module, the first limiting module and the second limiting module are jointly used for limiting the headstock shell in a first direction, and the first direction faces the second side face from the first side face; the third limiting module is arranged on the third side surface of the support frame; the fourth limiting module is arranged on the fourth side face of the supporting frame, the first limiting module, the second limiting module, the third limiting module and the fourth limiting module encircle the supporting frame together, the third side face is opposite to the fourth side face, the third limiting module and the fourth limiting module are used for limiting the headstock shell in the second direction together, and the second direction is from the third side face to the fourth side face.

Optionally, the first limiting module includes a first connecting arm, a first standing arm and a first limiting component, one end of the first connecting arm is connected to the first side, one end of the first standing arm is connected to the other end of the first connecting arm, and the first limiting component is installed at one end of the first standing arm; the second limiting module comprises a second connecting arm, a second vertical arm and a second limiting assembly, one end of the second connecting arm is connected to the second side face, one end of the second vertical arm is connected with the other end of the second connecting arm, the second limiting assembly is arranged at one end of the second vertical arm, the first limiting assembly is opposite to the second limiting assembly, and the first limiting assembly and the second limiting assembly are jointly used for limiting the headstock shell in the first direction.

Optionally, the first spacing subassembly includes first mounting, first screw rod and first butt piece, the one end of first mounting with the other end of first arm of erectting is fixed mutually, the other end of first mounting is provided with first screw, first screw rod spiro union in first screw, first butt piece set up in the one end of first screw rod, first butt piece is used for the butt the locomotive shell.

Optionally, the second limiting component comprises a second fixing piece, a second screw rod and a second abutting piece, one end of the second fixing piece is fixed with the other end of the second vertical arm, a second screw hole is formed in the other end of the second fixing piece, the second screw rod is in threaded connection with the second screw hole, the second abutting piece is arranged at one end of the second screw rod, and the second abutting piece is used for abutting against the headstock shell.

Optionally, the third limit module includes third linking arm, third erects arm and spiro union piece, the one end of third linking arm is fixed in the support frame, the one end of third erects the arm with the other end of third linking arm is connected, the other end of third erects the arm is provided with the third screw, the spiro union piece spiro union in the third screw, the spiro union piece is used for the butt locomotive shell.

Optionally, the fourth spacing module includes fourth linking arm and fourth spacing subassembly, the one end of fourth linking arm is fixed in the fourth side of support frame, the shape of fourth spacing subassembly is "L" shape, the one end of fourth spacing subassembly is fixed in the other end of fourth linking arm, the other end of fourth spacing subassembly is used for the butt locomotive shell.

Optionally, a step is further disposed at the other end of the fourth limiting component, and the step is used for bearing the headstock housing.

Optionally, the number of the third limiting modules and the fourth limiting modules is multiple, the third limiting modules are arranged on the third side face at intervals, the fourth limiting modules are arranged on the fourth side face at intervals, and the third limiting modules and the fourth limiting modules are jointly used for limiting the headstock shell in the second direction.

Optionally, the first bearing part is provided with a first locating pin, the second bearing part is provided with a second locating pin, the headstock shell is provided with a first locating hole and a second locating hole corresponding to the first locating pin, when the headstock shell is installed in the fixture, the first locating pin is inserted into the first locating hole, and the second locating pin is inserted into the second locating hole.

In order to solve the technical problems, another technical scheme adopted by the embodiment of the utility model is as follows: a production line is provided, comprising the clamp.

The embodiment of the utility model has the beneficial effects that: different from the situation of the prior art, the embodiment of the utility model bears the headstock shell through the first bearing part and the second bearing part, and limits the headstock assembly in the first direction and the second direction by surrounding the first limiting module, the second limiting module, the third limiting module and the fourth limiting module on the support frame, so that the risk of deformation of the headstock shell during welding is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a schematic view of a clamp and a headstock housing in an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the headstock housing mounted on a jig according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of the clamp and the head housing in a first view in accordance with an embodiment of the present utility model;

fig. 5 is a schematic view of the structure of the clamp and the head housing in the second view according to the embodiment of the present utility model.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," and the like as used in this specification, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features mentioned in the different embodiments of the utility model described below can be combined with one another as long as they do not conflict with one another.

Referring to fig. 1 and 2, the vehicle head housing 200 includes a first side plate 201, a second side plate 202, a third side plate 203, a fourth side plate 204, and a front end plate 205. One end of the first side plate 201 is connected with one end of the second side plate 202, the other end of the second side plate 202 is connected with one end of the third side plate 203, one end of the fourth side plate 204 is connected with the other end of the third side plate 203, the other end of the fourth side plate 204 is connected with one end of the first side plate 201, the second side plate 202, the third side plate 203 and the fourth side plate 204 are all connected with the periphery of the front end plate 205, and the first side plate 201, the second side plate 202, the third side plate 203, the fourth side plate 204 and the front end plate 205 are jointly enclosed to form a containing cavity 206, and the containing cavity 206 is used for containing components such as an engine and a water tank of an automobile. The first side plate 201, the second side plate 202, the third side plate 203, the fourth side plate 204 and the front end plate 205 are fixed by welding, the first side plate 201, the second side plate 202, the third side plate 203, the fourth side plate 204 and the front end plate 205 are spliced together before the welding, then the spliced first side plate 201, second side plate 202, third side plate 203, fourth side plate 204 and front end plate 205 are placed on the fixture 100 to be fixed by welding, so that the vehicle head shell 200 is formed, and the vehicle head shell 200 is detached from the fixture 100 after the welding is finished.

Referring to fig. 2, 3, 4 and 5, the jig 100 includes: the device comprises a support frame 1, a first limiting module 2, a second limiting module 3, a third limiting module 4, a fourth limiting module 5, a fifth limiting module 6 and a sixth limiting module 7. The first limiting module 2 is arranged on a first side face of the supporting frame 1, the second limiting module 3 is arranged on a second side face of the supporting frame 1, the first side face is opposite to the second side face, and the first limiting module 2 is opposite to the second limiting module 3. The third limiting module 4 is arranged on a third side surface of the support frame 1, the fourth limiting module 5 is arranged on a fourth side surface of the support frame 1, the third side surface is opposite to the fourth side surface, and the first limiting module 2, the second limiting module 3, the third limiting module 4 and the fourth limiting module 5 encircle the support frame 1 together. The fifth limiting module 6 is disposed on the first side surface of the support frame 1, and the first limiting module 2 and the fifth limiting module 6 are disposed at intervals. The sixth limiting module 7 is disposed on the second side surface of the support frame 1, and the sixth limiting module 7 is opposite to the fifth limiting module 6. The support frame 1 is used for supporting the headstock shell 200, the first spacing module 2 and the fifth spacing module 6 are used for the butt jointly the first curb plate 201, the second spacing module 3 and the sixth spacing module 7 are used for the butt jointly the second curb plate 202, through the spacing module 2 of first, the spacing module 3 of second, the spacing module 6 of fifth and the spacing module 7 of sixth can realize carrying out spacing effect to the headstock shell 200 in first direction, first direction is followed first side orientation the second side. The third limiting module 4 is configured to abut against the third side plate 203, the fourth limiting module 5 is configured to abut against the fourth side plate 204, and an effect of limiting the vehicle head housing 200 in a second direction can be achieved by the third limiting module 4 and the fourth limiting module 5, and the second direction is from the third side face to the fourth side face. In this embodiment, the support frame 1 is used to carry the headstock housing 200, the first limiting module 2, the second limiting module 3, the fifth limiting module 6 and the sixth limiting module 7 are used to jointly limit the headstock housing 200 in the first direction, the third limiting module 4 and the fourth limiting module 5 are used to limit the headstock housing 200 in the second direction, so that the risk that the first side plate 201, the second side plate 202, the third side plate 203, the fourth side plate 204 and the front end plate 205 deform during welding and fixing is effectively reduced, and the welding precision of the headstock housing 200 is improved.

For the above-mentioned support frame 1, referring to fig. 1 and 3, the support frame 1 is provided with a first bearing portion 11, a second bearing portion 12, a third bearing portion 13 and a fourth bearing portion 14. The first bearing portion 11, the second bearing portion 12, the third bearing portion 13 and the fourth bearing portion 14 are all disposed on the top of the support frame 1, the first bearing portion 11 and the third bearing portion 13 are used for bearing the third side plate 203 together, and the second bearing portion 12 and the fourth bearing portion 14 are used for bearing the fourth side plate 204 together.

In some embodiments, referring to fig. 1 and 3, the first bearing portion 11 is provided with a first positioning pin 111, the second bearing portion 12 is provided with a second positioning pin 121, the third bearing portion 13 is provided with a third positioning pin 131, and the fourth bearing portion 14 is provided with a fourth positioning pin 141. The third side plate 203 is provided with a first positioning hole 2031 and a third positioning hole 2032, the fourth side plate 204 is provided with a second positioning hole 2041 and a fourth positioning hole 2042, when the headstock housing 200 is mounted on the fixture 100, the first positioning pin 111 is inserted into the first positioning hole 2031, the third positioning pin 131 is inserted into the third positioning hole 2032, so as to position the third side plate 203, meanwhile, the second positioning pin 121 is inserted into the second positioning hole 2041, and the fourth positioning pin 141 is inserted into the fourth positioning hole 2042, so as to position the fourth side plate 204. By positioning the third side plate 203 and the fourth side plate 204, the accuracy of the head housing 200 at the time of welding can be further improved.

For the first limiting module 2 described above, referring to fig. 1 and 3, the first limiting module 2 includes a first connecting arm 21, a first standing arm 22, and a first limiting component 23. One end of the first connecting arm 21 is connected to the first side, one end of the first upright arm 22 is connected to the other end of the first connecting arm 21, the first limiting component 23 is mounted at one end of the first upright arm 22, and the first limiting component 23 is used for abutting against the surface of the first side plate 201, which faces away from the second side plate 202.

For the first limiting assembly 23 described above, referring to fig. 3 and 4, the first limiting assembly 23 includes a first fixing member 231, a first screw 232, and a first abutment member 233. One end of the first fixing member 231 is fixed to the other end of the first upright arm 22, a first screw hole 2311 is provided at the other end of the first fixing member 231, the first screw 232 is screwed to the first screw hole 2311, the first abutting member 233 is disposed at one end of the first screw 232, and the first abutting member 233 is used for abutting against the surface of the first side plate 201 facing away from the second side plate 202. It will be appreciated that the first fixing member 231 and the first standing arm 22 may be fixed by bolts or welded.

For the first abutment 233, referring to fig. 3 and 4, the first abutment 233 includes a first protrusion 2331 and a first insertion portion 2332, one end of the first protrusion 2331 is fixed to one end of the first screw 232, and one end of the first insertion portion 2332 is fixed to the other end of the first protrusion 2331. The first side plate 201 is provided with a fifth positioning hole 2011, the first plugging portion 2332 is configured to plug in the fifth positioning hole 2011, so as to position the first side plate 201, and the first protruding portion 2331 is configured to abut against a surface of the first side plate 201 facing away from the second side plate 202.

For the second limiting module 3 described above, referring to fig. 1 and 3, the second limiting module 3 includes a second connecting arm 31, a second standing arm 32, and a second limiting assembly 33. One end of the second connecting arm 31 is connected to the second side, one end of the second upright arm 32 is connected to the other end of the second connecting arm 31, the second limiting component 33 is mounted on one end of the second upright arm 32, and the second limiting component 33 is used for abutting against the surface of the second side plate 202, which faces away from the first side plate 201.

For the second limiting component 33 described above, referring to fig. 3 and 5, the second limiting component 33 includes a second fixing member 331, a second screw 332, and a second abutting member 333. One end of the second fixing member 331 is fixed to the other end of the second upright arm 32, a second screw hole 3311 is provided at the other end of the second fixing member 331, the second screw rod 332 is screwed to the second screw hole 3311, the second abutting member 333 is disposed at one end of the second screw rod 332, and the second abutting member 333 is used for abutting against the surface of the second side plate 202 facing away from the first side plate 201. It will be appreciated that the second fixing member 331 and the second standing arm 32 may be fixed by bolts or by welding.

For the second abutting element 333, referring to fig. 3 and 5, the second abutting element 333 includes a second protruding portion 3331 and a second inserting portion 3332, wherein one end of the second protruding portion 3331 is fixed to one end of the second screw 332, and one end of the second inserting portion 3332 is fixed to the other end of the second protruding portion 3331. The second side plate 202 is provided with a sixth positioning hole 2021, the second insertion portion 3332 is used for inserting the sixth positioning hole 2021, so as to position the second side plate 202, and the second protruding portion 3331 is used for abutting against the surface of the second side plate 202 facing away from the first side plate 201. The first side plate 201 is positioned through the first inserting portion 2332, the first protruding portion 2331 abuts against the surface of the first side plate 201, which faces away from the second side plate 202, the second side plate 202 is positioned through the second inserting portion 3332, and the second side plate 202 faces away from the surface of the first side plate 201, so that the effect of positioning the headstock housing 200 in the first direction is achieved, and the precision of the headstock housing 200 in welding forming is improved.

For the third limit module 4 described above, referring to fig. 3 and 5, the third limit module 4 includes a third connecting arm 41, a third standing arm 6242, and a screw 43. One end of the third connecting arm 41 is fixed to the support frame 1, one end of the third upright arm 6242 is connected to the other end of the third connecting arm 41, and a third screw hole 6311421 is provided at the other end of the third upright arm 6242. The third side plate 203 is further provided with a through hole 2033, and the screw member 43 passes through the through hole 2033 and is then screwed into the third screw hole 6311421, so as to position the third side plate 203, and meanwhile, the screw member 43 is also abutted against the surface of the third side plate 203, which is away from the third upright arm 6242.

For the fourth limiting module 5 described above, referring to fig. 3 and 4, the fourth limiting module 5 includes a fourth connecting arm 51 and a fourth limiting assembly 52. One end of the fourth connecting arm 51 is fixed on the fourth side surface of the support frame 1, the fourth limiting component 52 is in an L shape, one end of the fourth limiting component 52 is fixed on the other end of the fourth connecting arm 51, and the other end of the fourth limiting component 52 is used for abutting against the surface of the fourth side plate 204, which is away from the third side plate 203. The threaded connection piece 43 is abutted with the surface of the third side plate 203, which is away from the third vertical arm 6242, and the other end of the fourth limiting assembly 52 is abutted with the surface of the fourth side plate 204, which is away from the third side plate 203, so that the vehicle head shell 200 is limited in the second direction.

For the fourth limiting assembly 52 described above, referring to fig. 1, 3 and 4, the other end of the fourth limiting assembly 52 is further provided with a step 521, and the step 521 is used for carrying the fourth side plate 204.

In some embodiments, referring to fig. 1, 3 and 5, the number of the third limiting modules 4 is plural, the plurality of third limiting modules 4 are disposed on the third side surface of the support frame 1 at intervals, the third side plate 203 is provided with a plurality of through holes 2033, the screw member 43 of the third limiting module 4 passes through one of the through holes 2033 and is then screwed into one of the third screw holes 6311421, and meanwhile, the screw members 43 of the plurality of third limiting modules 4 are all abutted against the surface of the third side plate 203 facing away from the fourth side plate 204, thereby further improving the stability of the fixture 100 in limiting the headstock housing 200 in the second direction, and being beneficial to improving the welding precision of the headstock housing 200 during welding fixation.

In some embodiments, referring to fig. 1, 3 and 4, the number of the fourth limiting modules 5 is plural, the fourth limiting modules 5 are disposed on the fourth side surface at intervals, and the fourth limiting assemblies 52 of the fourth limiting modules 5 are abutted against the surfaces of the fourth side plates 204 facing away from the third side plates 203, which is beneficial to further improving the stability of the fixture 100 in limiting the headstock housing 200 in the second direction, thereby further improving the welding precision of the headstock housing 200 during welding.

For the fifth limit module 6 described above, referring to fig. 3 and 4, the fifth limit module 6 includes a fifth connecting arm 61, a third standing arm 6242, and a fifth limit assembly 63. One end of the fifth connecting arm 61 is connected to the first side, one end of the third upright arm 6242 is connected to the other end of the fifth connecting arm 61, the fifth limiting component 63 is mounted on one end of the third upright arm 6242, and the fifth limiting component 63 is used for abutting against the surface of the first side plate 201 facing away from the second side plate 202.

For the fifth limiting assembly 63 described above, referring to fig. 3 and 4, the fifth limiting assembly 63 includes a third fixing member 631, a third screw 632, and a third abutment member 633. One end of the third fixing member 631 is fixed to the other end of the third upright arm 6242, a third screw hole 6311421 is provided at the other end of the third fixing member 631, the third screw rod 632 is screwed to the third screw hole 6311421, the third abutting member 633 is disposed at one end of the third screw rod 632, and the third abutting member 633 is configured to abut against the surface of the first side plate 201 facing away from the second side plate 202, so as to improve the stability of the fixture 100 in limiting the headstock housing 200 in the first direction.

For the sixth limiting module 7 described above, referring to fig. 3 and 5, the sixth limiting module 7 includes a sixth connecting arm 71, a fourth standing arm 72, and a sixth limiting assembly 73. One end of the sixth connecting arm 71 is connected to the second side, one end of the fourth upright arm 72 is connected to the other end of the sixth connecting arm 71, the sixth limiting assembly 73 is mounted at one end of the fourth upright arm 72, and the sixth limiting assembly 73 is used for abutting against the surface of the second side plate 202 facing away from the first side plate 201.

For the sixth limiting assembly 73 described above, referring to fig. 3 and 5, the sixth limiting assembly 73 includes a fourth fixing member 731, a fourth screw 732, and a fourth abutting member 733. One end of the fourth fixing part 731 is fixed to the other end of the fourth upright arm 72, a fourth screw hole 7311 is provided at the other end of the fourth fixing part 731, the fourth screw 732 is screwed to the fourth screw hole 7311, the fourth abutting part 733 is disposed at one end of the fourth screw 732, and the fourth abutting part 733 is used for abutting against the surface of the second side plate 202 facing away from the first side plate 201, so that stability of the fixture 100 in limiting the vehicle head housing 200 in the first direction is improved.

In the embodiment of the utility model, the first bearing part 11 and the second bearing part 12 are used for bearing the head shell 200, and the first limiting module 2, the second limiting module 3, the third limiting module 4 and the fourth limiting module 5 are used for surrounding the support frame 1, so that the head assembly is limited in the first direction and the second direction, and the risk of deformation of the head shell 200 during welding is reduced.

The present utility model further provides an embodiment of a production line, where the production line includes the above-mentioned fixture 100, and the specific structure and function of the fixture 100 can be referred to the above-mentioned embodiment, which is not described herein again.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A clamp, comprising:

the support frame is provided with a first bearing part and a second bearing part, the first bearing part and the second bearing part are both arranged at the top of the support frame, and the first bearing part and the second bearing part are jointly used for bearing the headstock shell;

the first limiting module is arranged on the first side surface of the support frame;

the first limiting module and the second limiting module are jointly used for limiting the headstock shell in a first direction, and the first direction faces the second side face from the first side face;

the third limiting module is arranged on the third side surface of the support frame;

the fourth limiting module is arranged on the fourth side face of the supporting frame, the first limiting module, the second limiting module, the third limiting module and the fourth limiting module encircle the supporting frame together, the third side face is opposite to the fourth side face, the third limiting module and the fourth limiting module are used for limiting the headstock shell in the second direction together, and the second direction is from the third side face to the fourth side face.

2. The fixture of claim 1, wherein the fixture comprises a plurality of clamping plates,

the first limiting module comprises a first connecting arm, a first vertical arm and a first limiting component, one end of the first connecting arm is connected to the first side face, one end of the first vertical arm is connected with the other end of the first connecting arm, and the first limiting component is installed at one end of the first vertical arm;

the second limiting module comprises a second connecting arm, a second vertical arm and a second limiting assembly, one end of the second connecting arm is connected to the second side face, one end of the second vertical arm is connected with the other end of the second connecting arm, the second limiting assembly is arranged at one end of the second vertical arm, the first limiting assembly is opposite to the second limiting assembly, and the first limiting assembly and the second limiting assembly are jointly used for limiting the headstock shell in the first direction.

3. A jig according to claim 2, wherein,

the first limiting assembly comprises a first fixing piece, a first screw rod and a first abutting piece, one end of the first fixing piece is fixed with the other end of the first vertical arm, a first screw hole is formed in the other end of the first fixing piece, the first screw rod is in threaded connection with the first screw hole, the first abutting piece is arranged at one end of the first screw rod, and the first abutting piece is used for abutting against the headstock shell.

4. A jig according to claim 2, wherein,

the second limiting assembly comprises a second fixing piece, a second screw rod and a second abutting piece, one end of the second fixing piece is fixed with the other end of the second vertical arm, a second screw hole is formed in the other end of the second fixing piece, the second screw rod is in threaded connection with the second screw hole, the second abutting piece is arranged at one end of the second screw rod, and the second abutting piece is used for abutting against the headstock shell.

5. The fixture of claim 1, wherein the fixture comprises a plurality of clamping plates,

the third limiting module comprises a third connecting arm, a third vertical arm and a screw connector, one end of the third connecting arm is fixed on the supporting frame, one end of the third vertical arm is connected with the other end of the third connecting arm, a third screw hole is formed in the other end of the third vertical arm, the screw connector is in screw connection with the third screw hole, and the screw connector is used for being in butt joint with the headstock shell.

6. The fixture of claim 1, wherein the fixture comprises a plurality of clamping plates,

the fourth limiting module comprises a fourth connecting arm and a fourth limiting component, one end of the fourth connecting arm is fixed on the fourth side face of the supporting frame, the fourth limiting component is L-shaped, one end of the fourth limiting component is fixed on the other end of the fourth connecting arm, and the other end of the fourth limiting component is used for being abutted against the headstock shell.

7. The fixture of claim 6, wherein the fixture comprises a plurality of clamping plates,

the other end of the fourth limiting assembly is further provided with a step, and the step is used for bearing the headstock shell.

8. The fixture of claim 1, wherein the fixture comprises a plurality of clamping plates,

the number of the third limiting modules and the fourth limiting modules is multiple, the third limiting modules are arranged on the third side face at intervals, the fourth limiting modules are arranged on the fourth side face at intervals, and the third limiting modules and the fourth limiting modules are jointly used for limiting the headstock shell in the second direction.

9. The fixture of claim 1, wherein the fixture comprises a plurality of clamping plates,

the first bearing part is provided with a first locating pin, the second bearing part is provided with a second locating pin, the headstock shell is provided with a first locating hole and a second locating hole which correspond to each other, when the headstock shell is installed on the clamp, the first locating pin is inserted into the first locating hole, and the second locating pin is inserted into the second locating hole.

10. A production line comprising a clamp according to any one of claims 1-9.

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