CN219434518U

CN219434518U - Clamping device and tensile testing equipment

Info

Publication number: CN219434518U
Application number: CN202320971752.7U
Authority: CN
Inventors: 贾子良; 陈海涛; 丛岩; 柯鹏飞; 阳超
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-04-26
Filing date: 2023-04-26
Publication date: 2023-07-28
Anticipated expiration: 2033-04-26

Abstract

The application relates to the technical field of battery production and provides a clamping device and tensile testing equipment, wherein the clamping device comprises a first clamping mechanism and a second clamping mechanism, and the first clamping mechanism is provided with a first clamping space with adjustable size; the second clamping mechanism is provided with a second clamping space with adjustable size and a third clamping space with adjustable size; the second clamping space and the third clamping space are alternatively matched with the first clamping space so as to jointly clamp two different parts of a structural member. The clamping device can improve the utilization rate of the clamping device, improve the compatibility of clamping different structural members, and further facilitate saving the number of the clamping devices and reduce the cost.

Description

Clamping device and tensile testing equipment

Technical Field

The application relates to the technical field of battery production, in particular to a clamping device and tensile testing equipment.

Background

The clamping device is used for clamping an object and can be applied to tensile testing equipment for clamping a piece to be tested. The tension test equipment is a device for carrying out tension test on the to-be-tested piece and can be used for testing the reliability of the to-be-tested piece. For example, in the production process of a battery, a tensile test is generally required for a structural member formed by welding two components (such as a tab and a tab, and also such as a tab and a top cover, but not limited thereto) to test the reliability of welding between the two components.

In some cases, in order to clamp structural members with different structures, a plurality of clamping devices are generally required to be arranged adaptively, and if tension tests are required to be carried out on the structural members with different structures, a plurality of tension test devices are required to be arranged, so that the device has low utilization rate, serious resource waste and high cost.

Disclosure of Invention

The embodiment of the application provides a clamping device and tensile testing equipment, can improve and set up a plurality of clamping devices and carry out the centre gripping to the structure of different structures and lead to the low technical problem of clamping device utilization ratio.

In a first aspect, embodiments of the present application provide a clamping device, including:

a first clamping mechanism having a first clamping space with an adjustable size; and

a second clamping mechanism having a second clamping space with an adjustable size and a third clamping space with an adjustable size;

the second clamping space and the third clamping space are alternatively matched with the first clamping space so as to jointly clamp two different parts of a structural member.

The technical scheme in the embodiment of the application has at least the following technical effects or advantages:

According to the clamping device, when the structural members with different structures are required to be clamped, the second clamping space or the third clamping space of the second clamping mechanism can be correspondingly selected to be matched with the first clamping space of the first clamping mechanism to clamp the structural members, so that the same clamping device can clamp different structural members, compared with the scheme that a plurality of clamping devices are required to be arranged and only one clamping device can clamp one structural member, the utilization rate of the clamping device can be effectively improved, the compatibility of clamping devices for clamping different structural members can be improved, the quantity of the clamping devices can be saved, and the cost is reduced.

In some embodiments, the first clamping mechanism includes a first clamping member and a first clamping engagement member; the first clamping piece comprises a first clamping part, the first clamping matching piece comprises a first clamping matching part, and the first clamping part and the first clamping matching part are oppositely arranged to form the first clamping space between the first clamping part and the first clamping matching part; the first clamping piece and the first clamping matching piece can move relatively so as to adjust the size of the first clamping space;

the second clamping mechanism comprises a second clamping piece and a second clamping matching piece; the second clamping piece comprises a second clamping part and a third clamping part, and the second clamping matching piece comprises a second clamping matching part and a third clamping matching part; the second clamping part and the second clamping matching part are oppositely arranged to form the second clamping space therebetween, and the third clamping part and the third clamping matching part are oppositely arranged to form the third clamping space therebetween; the second clamping member and the second clamping fitting are relatively movable to adjust the dimensions of the second clamping space and the third clamping space.

Through adopting above-mentioned technical scheme, when needs centre gripping structure, first clamping piece and first centre gripping cooperation piece relative movement are in order to cooperate the first position of centre gripping structure through first clamping part and first centre gripping cooperation portion, and second clamping piece and second centre gripping cooperation piece relative movement are in order to cooperate with second centre gripping cooperation portion through second clamping part, or cooperate the second position of centre gripping structure through third clamping part and third centre gripping cooperation portion. Compared with the structure with three or more parts for clamping the structural members, the structure of the first clamping mechanism and the structure of the second clamping mechanism are simpler, so that the structure complexity and the cost are reduced.

In some embodiments, the first clamping mechanism further comprises a first connecting shaft, and the first clamping member is pivoted to the first clamping mating member through the first connecting shaft.

By adopting the technical scheme, the clamping device is more suitable for clamping thinner objects (such as sheet bodies or foil materials with the thickness smaller than 1 mm), and the reliability of the clamping structural member can be improved.

In some embodiments, one of the first clamping member and the first clamping matching member is provided with a first connecting part and a second connecting part at intervals, and the other one of the first clamping member and the first clamping matching member is provided with a third connecting part; the third connecting part is positioned between the first connecting part and the second connecting part, and is pivoted with the first connecting part and the second connecting part through the first connecting shaft.

Through adopting above-mentioned technical scheme, when first holder and first centre gripping cooperation piece rotate based on first connecting axle is relative, the third connecting portion promptly rotates between first connecting portion and second connecting portion, can improve the reliability that first holder and first centre gripping cooperation piece rotate and be connected.

In some embodiments, the first connecting portion is provided with a first through hole, the third connecting portion is provided with a second through hole, and the second connecting portion is provided with a first connecting hole; the first connecting shaft includes:

the first shaft part is penetrated through the first through hole and the second through hole and is connected with the first connecting hole; and

the first head part is connected with the first shaft part and is abutted against one side of the first connecting part, which is opposite to the third connecting part.

By adopting the technical scheme, the convenience and the connection reliability of the first clamping piece, the first clamping matching piece and the first connecting shaft are improved.

In some embodiments, the first clamping mechanism further comprises a pad positioned between the first clamping member and the first clamping fitting and movable within the first clamping space relative to the first clamping member and/or the first clamping fitting.

Through adopting above-mentioned technical scheme, compare in the condition that does not set up the pad spare, contact fit area between the contact fit area between when can increase first fixture centre gripping structure and the structure, and then do benefit to and improve the centre gripping reliability, be particularly useful for the thinner object of centre gripping (for example thickness is less than 1 mm's slice body or foil).

In some embodiments, the first clamping portion includes a plurality of first protrusions, and the pad includes a plurality of second protrusions disposed opposite the first protrusions; and/or

The first clamping fit portion comprises a plurality of third protrusions, and the pad comprises a plurality of fourth protrusions arranged opposite to the third protrusions.

By adopting the technical scheme, the first clamping mechanism can contact and clamp the structural member through the protrusions, so that the clamping firmness can be improved.

In some embodiments, the first protrusion and/or the second protrusion are saw-tooth protrusions; and/or

The third protrusion and/or the fourth protrusion are saw-tooth protrusions.

Through adopting above-mentioned technical scheme, when first fixture centre gripping structure, promptly through zigzag protruding and structure contact and the application of force to the structure, be favorable to increasing with the frictional force between the structure, and then be favorable to improving the centre gripping reliability of structure.

In some embodiments, the first clamping mechanism further comprises a first locking member adjustably connected to the first clamping member and the first clamping engagement member for adjusting a distance between the first clamping portion and the first clamping engagement portion.

Through adopting above-mentioned technical scheme, through adjusting first retaining member, can adjust the clamping force between first clamping piece and the first clamping fit piece to first clamping piece and pad piece centre gripping or loosen and unload the structure and/or make first clamping fit piece and pad piece centre gripping or loosen and unload the structure.

In some embodiments, the first clamping fitting is provided with a third through hole, and the first clamping fitting is provided with a second connecting hole; the first locking member includes:

the first rod part penetrates through the third through hole and is in threaded connection with the second connecting hole; the first rod part is in clearance fit with the third through hole; and

the first limiting part is connected to the first rod part and used for abutting against one side, opposite to the first clamping piece, of the first clamping matching piece.

Through adopting above-mentioned technical scheme, the simple structure and the reliable of first retaining member can realize conveniently adjusting the clamping force between first clamping piece and the first centre gripping cooperation piece.

In some embodiments, the first clamp comprises:

one end of the first connecting section is pivoted with one end of the first clamping matching piece through the first connecting shaft; and

one end of the second connecting section is connected with the other end of the first connecting section in a bending way; the other end of the second connecting section is provided with the first clamping part;

the first clamping mechanism further comprises a second connecting shaft, and the second connecting shaft is connected to the first connecting section.

By adopting the technical scheme, the first connecting section can provide installation for the second connecting shaft, so that the first clamping mechanism is connected with an external device (such as a tensile machine of tensile testing equipment) through the second connecting shaft.

In some embodiments, the first connection section includes a first face, a second face, and a third face, the first face facing away from the first clip portion; the second surface and the third surface are respectively positioned at two opposite sides of the first surface along the axial direction of the second connecting shaft; the first surface is provided with a connecting groove, the second surface is provided with a connecting through hole communicated with the connecting groove, and the third surface is provided with a third connecting hole communicated with the connecting groove; the second connecting shaft penetrates through the connecting through hole and the connecting groove and is connected with the third connecting hole.

Through adopting above-mentioned technical scheme, the second connecting axle wears to locate connecting hole and spread groove and is connected with the third connecting hole and can realize the assembly, does benefit to improvement and is connected with external device's assembly convenience and reliability.

In some embodiments, the second clamp portion includes a plurality of fifth protrusions and the second clamp mating portion includes a plurality of sixth protrusions; the third clamping part is a first groove, and the third clamping matching part is a second groove.

By adopting the technical scheme, the firmness of clamping the structural member by the second clamping part and the second clamping matching part can be improved, and the clamping device is particularly suitable for clamping the sheet-shaped body with smaller thickness. The third clamping part and the third clamping matching part are grooves, so that the clamping device is suitable for clamping a plate-shaped body or a block-shaped body with a certain thickness.

In some embodiments, the fifth protrusion and/or the sixth protrusion are saw-tooth protrusions.

Through adopting above-mentioned technical scheme, when second fixture centre gripping structure, promptly through zigzag protruding and structure contact and the application of force to the structure, be favorable to increasing with the frictional force between the structure, and then be favorable to improving the centre gripping reliability of structure.

In some embodiments, an inlet for the structural member to extend into the second clamping space or the third clamping space is formed between the second clamping member and the second clamping mating member;

the fifth bulge is positioned on one side of the inlet, and the first groove is positioned on one side of the fifth bulge away from the inlet; the sixth protrusion is located at one side of the inlet, and the second groove is located at one side of the sixth protrusion away from the inlet.

By adopting the technical scheme, when the structural member stretches into the space between the second clamping piece and the second clamping matching piece from the inlet, the structural member firstly enters the second clamping space, and the sheet-shaped body is clamped by the second clamping part and the second clamping matching part, which are more convenient to include the protrusions. When the structural member is required to be clamped through the third clamping space, the structural member is penetrated with the inlet and the second clamping space, and the second clamping part and the second clamping matching part can play a certain limiting role on the structural member.

In some embodiments, the second clamping mechanism further comprises a second locking member adjustably connected to the second clamping member and the second clamping fitting for adjusting a distance between the second clamping member and the second clamping fitting to adjust a size of the second clamping space and the third clamping space.

Through adopting above-mentioned technical scheme, through adjusting the second retaining member, the clamping force between adjustable second clamping piece and the second centre gripping cooperation piece.

In some embodiments, a fifth through hole is formed in the second clamping matching piece, and a fourth connecting hole is formed in the second clamping piece; the second locking member includes:

the second rod part penetrates through the fifth through hole and is in threaded connection with the fourth connecting hole; and

the second limiting part is connected to the second rod part and used for abutting against one side of the second clamping matching piece, which is opposite to the second clamping piece.

Through adopting above-mentioned technical scheme, the simple structure and the reliable of second retaining member can realize conveniently adjusting the clamping force between second clamping piece and the second centre gripping cooperation piece.

In some embodiments, the second clamping mechanism further comprises:

a support base; and

the guide piece is arranged on the supporting seat;

wherein the second clamping member and the second clamping mating member are slidably disposed on the guide member.

By adopting the technical scheme, the supporting seat can provide support and installation for the guide piece, the second clamping piece and the second clamping matching piece. The guide member is favorable for improving the stability of the relative movement of the second clamping member and the second clamping matching member.

In some embodiments, the first clamping mechanism is movable toward or away from the second clamping mechanism.

By adopting the technical scheme, the first part of the first structural member clamped by the first clamping mechanism and the second part of the first structural member clamped by the second clamping mechanism are pulled, or the first part of the second structural member clamped by the first clamping mechanism and the second part of the second structural member clamped by the second clamping mechanism are pulled, so that the tensile test of the first structural member or the second structural member is facilitated.

In a second aspect, an embodiment of the present application provides a tensile testing apparatus, including:

a pulling machine; and

the clamping device according to any of the embodiments of the first aspect, wherein the first clamping mechanism and/or the second clamping mechanism are/is arranged on the tensile machine.

It will be appreciated that the advantages of the second aspect may be found in the relevant description of the first aspect, and will not be described in detail herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the embodiments or the drawings needed in the related art, and it is obvious that the following description is only a few embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a clamping device according to some embodiments of the present disclosure;

fig. 2 is a schematic front view of a first clamping mechanism according to some embodiments of the present disclosure;

FIG. 3 is a schematic perspective view of the first clamping mechanism shown in FIG. 2;

FIG. 4 is a schematic perspective view of a first clamping member of the first clamping mechanism shown in FIG. 3;

FIG. 5 is a right side view of the first clamping member shown in FIG. 4;

FIG. 6 is a schematic perspective view of a first clamping fitting of the first clamping mechanism shown in FIG. 3;

FIG. 7 is a schematic view of a first connecting shaft of the first clamping mechanism shown in FIG. 2;

FIG. 8 is a schematic left-hand view of the pad of the first clamping mechanism of FIG. 2;

fig. 9 is a schematic perspective view of a second clamping mechanism according to some embodiments of the present disclosure;

FIG. 10 is a schematic front view of a second clamping member of the second clamping mechanism shown in FIG. 9;

FIG. 11 is a right side view of the second clamping member of FIG. 10;

FIG. 12 is a schematic front view of a second clamping fitting of the second clamping mechanism of FIG. 9;

fig. 13 is a schematic left-hand view of the second clamping fitting of fig. 12.

Wherein, each reference sign in the figure:

100. a clamping device; 10. a first clamping mechanism; 20. a second clamping mechanism; 1001. a first clamping space; 2001. a second clamping space; 2002. a third clamping space;

11. A first clamping member; 12. a first clamping fitting; 21. a second clamping member; 22. a second clamping fitting;

101. a first clamping part; 102. a first clamping engagement portion; 201. a second clamping portion; 202. a third clamping portion; 203. a second clamping engagement portion; 204. a third clamping engagement;

13. a first connecting shaft; 103. a first connection portion; 104. a second connecting portion; 105. a third connecting portion; 1030. a first through hole; 1050. a second through hole; 1040. a first connection hole; 131. a first shaft portion; 132. a first head;

14. a pad; 1011. a first protrusion; 1401. a second protrusion; 1021. a third protrusion; 1402. a fourth protrusion;

15. a first locking member; 120. a third through hole; 110. a second connection hole; 151. a first lever portion; 152. a first limit part; 401. a fourth through hole; 16. a first screw;

111. a first connection section; 112. a second connection section; 1111. a first face; 1112. a second face; 1113. a third face; 1101. a connecting groove; 1102. a connecting through hole; 1103. a third connection hole; 17. a second connecting shaft; 2011. a fifth protrusion; 2031. a sixth protrusion; 2003. an inlet;

23. a second locking member; 220. a fifth through hole; 210. a fourth connection hole; 231. a second lever portion; 232. a second limit part; 26. a second screw;

24. A support base; 25. a guide member; 251. a slide bar; 2101. a first slide hole; 2201. a second slide hole; 241. a base; 242. a first support portion; 243. a second supporting part; 27. and a connecting piece.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.

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 application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the terms "length," "width," "thickness," "inner," "outer," "upper," "lower," "left," "right," and the like indicate 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 indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying a relative importance or implying a number of technical features indicated. For example, the first and second vias are merely for distinguishing between different vias and are not limited in their order, and the first via may also be designated as a second via, and the second via may also be designated as a first via, without departing from the scope of the various described embodiments. And the terms "first," "second," "third," and the like, do not necessarily denote the same or different features.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. The meaning of "plurality" is at least two, i.e., two and more.

In the present application, "and/or" is merely one association relationship describing the association object, meaning that three relationships may exist; for example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It is noted that in this application, words such as "in some embodiments," "illustratively," "for example," and the like are used to indicate examples, illustrations, or descriptions. Any embodiment or design described herein as "in some embodiments," "illustratively," "for example," should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "in some embodiments," "illustratively," "for example," and the like is intended to present related concepts in a concrete fashion, meaning that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples.

The clamping device is used for clamping the object and can be applied to tensile testing equipment so as to clamp the to-be-tested piece, and of course, the clamping device can also be applied to clamping the object in other scenes. The tension test equipment is a device for carrying out tension test on the to-be-tested piece and can be used for testing the reliability of the to-be-tested piece. For example, in the production process of a battery, a tensile test is generally required for a structural member formed by welding two components (such as a tab and a tab, and also such as a tab and a top cover, but not limited thereto) to test the reliability of welding between the two components.

In some cases, in order to clamp structural members of different structures, it is often necessary to provide a plurality of clamping devices adaptively. If tension tests are required to be carried out on structural members with different structures, a plurality of tension test devices are required to be arranged. For example, in the production process of a battery, two processes such as welding (e.g., ultrasonic welding) of a tab and welding (e.g., laser welding) of a tab and a top cover are generally required, and a welding tension test is required for the tab and the tab after welding and a welding tension test is required for the tab and the top cover after welding; at present, two tensile testing devices are usually required to be arranged, two sets of clamping devices are correspondingly arranged, one set of clamping device is used for clamping a structural member formed by welding a tab and a connecting piece so that one tensile testing device can carry out welding tensile testing on the structural member, and the other set of clamping device is used for clamping a structural member formed by welding the connecting piece and a top cover so that the other tensile testing device can carry out welding tensile testing on the structural member. Therefore, the clamping device and the tensile testing equipment have low utilization rate, serious resource waste and high cost.

Based on this, for improving need set up a plurality of clamping device and carry out the centre gripping to the structure of different structures and lead to the low technical problem of utilization ratio, this application embodiment has designed a clamping device, through setting up first clamping mechanism and second clamping mechanism, first clamping mechanism has the first clamping space of size adjustable, with can the centre gripping structure, second clamping mechanism has the second clamping space of size adjustable and the third clamping space of size adjustable, second clamping space and third clamping space alternatively cooperate with first clamping space, with two different positions of common centre gripping structure, but through same second clamping mechanism centre gripping different structure, consequently same clamping device can carry out the centre gripping to different structure, can improve clamping device's utilization ratio, and can improve the compatibility that clamping device carries out the centre gripping to different structure, and then be favorable to saving clamping device's quantity, reduce cost.

The clamping device disclosed by the embodiment of the application can be applied to tensile testing equipment for clamping a structural member, and further facilitating tensile testing of the structural member. The structural member can be a structural member with various structural forms and needs to be subjected to tensile test.

The tensile testing device may be applied to the technical field of battery production, so as to perform tensile testing on various structural members (for example, structural members formed by welding tabs and tabs, structural members formed by welding tabs and top covers, structural members formed by welding connecting tabs and tabs, and the like) with tensile testing requirements in the battery production and manufacturing process.

Of course, the application scene of the tensile test equipment is not limited to the technical field of battery production, and can be applied to various other scenes in which tensile tests on objects are required.

Next, description will be made of a clamping device provided in an embodiment of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a clamping device 100 according to some embodiments of the present application. The clamping device 100 comprises a first clamping mechanism 10 and a second clamping mechanism 20, wherein:

the first clamping mechanism 10 has a first clamping space 1001 of adjustable size.

The second clamping mechanism 20 has a second clamping space 2001 of adjustable size and a third clamping space 2002 of adjustable size.

The second clamping space 2001 and the third clamping space 2002 are alternatively matched with the first clamping space 1001 to jointly clamp two different parts of one structural member.

It will be appreciated that the first clamping mechanism 10 is a mechanism for clamping an object and that the first clamping space 1001 is a space for a structure to be clamped to extend into, so that the first clamping mechanism 10 clamps the structure. The size of the first clamping space 1001 is adjustable, which means that the size of the first clamping space 1001 can be adjusted, so that the first clamping mechanism 10 can clamp the structural member with a small size, and can release the structural member with a large size.

The first clamping mechanism 10 may be a clamping mechanism with various structural forms, for example, may include two components capable of relatively moving, or may include three or more components capable of relatively moving. The first holding space 1001 may be a space of various shapes, for example, a space formed by two members being provided at an interval, or a space formed by three or more members being surrounded by each other, but the present invention is not limited thereto, and may be provided as needed.

Similarly, the second clamping mechanism 20 is also a mechanism for clamping an object, and the second clamping space 2001 and the third clamping space 2002 are two different spaces for the structural member to be clamped to extend into. The size of the second clamping space 2001 is adjustable, which means that the size of the second clamping space 2001 can be adjusted, so that the second clamping mechanism 20 can clamp the structural member by being convenient for size adjustment, and the structural member can be convenient for size adjustment and loosening. Also, the size of the second clamping space 2001 is adjustable, which means that the size of the second clamping space 2001 can be adjusted to facilitate the size adjustment to enable the second clamping mechanism 20 to clamp the structural member and to facilitate the size adjustment to loosen the structural member.

The second clamping mechanism 20 may be a clamping mechanism of various structures, for example, may include two components capable of relative movement, or may include three or more components capable of relative movement. The second holding space 2001 and the third holding space 2002 may each be a space of various shapes, for example, a space formed by two members being provided at an interval, or a space formed by three or more members being surrounded by each other, but the present invention is not limited thereto, and may be provided as needed.

The clamping device 100 may be used to clamp structures of different configurations. Illustratively, when the clamping device 100 is required to clamp a first structural member, the first clamping mechanism 10 may adjust the size of the first clamping space 1001 to clamp a first portion of the first structural member through the first clamping space 1001, and the second clamping mechanism 20 may adjust the size of the second clamping space 2001 to clamp a second portion of the first structural member through the second clamping space 2001. When the clamping device 100 needs to clamp the second structural member, the first clamping mechanism 10 can adjust the size of the first clamping space 1001 to clamp the first portion of the second structural member through the first clamping space 1001, and the second clamping mechanism 20 can adjust the third clamping space 2002 to clamp the second portion of the second structural member through the third clamping space 2002.

The first structural member and the second structural member are two structural members with different structures; for example, the first structural member may be a member formed by connecting the tab with the tab (the first portion of the first structural member may be the tab, and the second portion of the first structural member may be the tab), and the second structural member may be a member formed by connecting the tab with the top cover (the first portion of the second structural member may be the tab, and the second portion of the second structural member may be the top cover), but the structural forms of the first structural member and the second structural member are not limited thereto.

As can be seen from the above description, when the clamping device 100 provided in this application needs to clamp structural members with different structures, the second clamping space 2001 or the third clamping space 2002 of the second clamping mechanism 20 can be correspondingly selected to clamp the structural members with the first clamping space 1001 of the first clamping mechanism 10, so that the same clamping device 100 can clamp different structural members, and compared with the scheme that a plurality of clamping devices are required to be provided and one clamping device can clamp only one structural member, the utilization rate of the clamping device 100 can be effectively improved, the compatibility of the clamping device 100 for clamping different structural members can be improved, the number of the clamping devices 100 can be saved, the number of tensile testing devices can be saved, and the cost can be reduced.

Referring to fig. 1, in some embodiments, a first clamping mechanism 10 includes a first clamping member 11 and a first clamping engagement member 12. The first clamping member 11 and the first clamping fitting 12 are disposed opposite to each other to form a first clamping space 1001 between the first clamping member 11 and the first clamping fitting 12, and the first clamping member 11 and the first clamping fitting 12 can move relatively to each other to adjust the size of the first clamping space 1001.

The second clamping mechanism 20 comprises a second clamping member 21 and a second clamping engagement member 22. The second clamping member 21 is disposed opposite to the second clamping mating member 22 to form a second clamping space 2001 and a third clamping space 2002 between the second clamping member 21 and the second clamping mating member 22, and the second clamping member 21 and the second clamping mating member 22 can move relatively to adjust the size of the second clamping space 2001 and the size of the third clamping space 2002.

It will be appreciated that the first clamping member 11 and the first clamping counterpart 12 are the actuating components of the first clamping mechanism 10 for clamping an object. The first clamping member 11 and the first clamping counterpart 12 may be various structural members having regular or irregular shapes, for example, plate-like structures, block-like structures, arm-like structures, bent structures, etc., but are not limited thereto. The first clamping member 11 and the first clamping fitting 12 may be identical or different in structure.

The first clamping member 11 and the first clamping matching member 12 can move relatively in a plurality of moving modes, for example, the two can rotate relatively, and can also move relatively close to or away from each other along a linear direction. The first clamping member 11 and the first clamping fitting 12 may or may not be connected (e.g., at least one of the first clamping member 11 and the first clamping fitting 12 may be connected to a driving member to drive the first clamping member 11 and the first clamping fitting 12 to move relatively by the driving member).

Similarly, the second clamping member 21 and the second clamping counterpart 22 are the actuating members of the second clamping mechanism 20 for clamping an object. The second clamping member 21 and the second clamping counterpart 22 may be various structural members having regular or irregular shapes, for example, plate-like structures, block-like structures, arm-like structures, bent structures, etc., but are not limited thereto. The second clamping member 21 and the second clamping fitting 22 may be identical or different in structure.

The second clamping member 21 and the second clamping matching member 22 can be moved relatively in various manners, for example, the two members can rotate relatively, and can also move relatively close to or away from each other along a linear direction. The second clamping member 21 and the second clamping mating member 22 may or may not be connected.

So configured, when the structural member needs to be clamped, the first clamping member 11 and the first clamping matching member 12 of the first clamping mechanism 10 can relatively move, so as to reduce the size of the first clamping space 1001, thereby clamping the first portion of the structural member; the second clamping member 21 and the second clamping mating member 22 of the second clamping mechanism 20 can move relatively to reduce the size of the second clamping space 2001 or the third clamping space 2002, thereby clamping the second portion of the structural member. Compared with the structure with three or more parts for clamping the structural members, the first clamping mechanism 10 and the second clamping mechanism 20 are simpler in structure, so that the structural complexity is reduced, and the cost is reduced.

It should be noted that, the structure of the first clamping mechanism 10 and the structure of the second clamping mechanism 20 are not limited thereto, and in other embodiments, the first clamping mechanism 10 may include three or more clamping members, and the second clamping mechanism 20 may include three or more clamping members.

Referring to fig. 1, optionally, in some embodiments, the first clamping member 11 includes a first clamping portion 101, the first clamping fitting 12 includes a first clamping fitting 102, and the first clamping portion 101 is disposed opposite to the first clamping fitting 102 to form a first clamping space 1001 between the first clamping portion 101 and the first clamping fitting 102.

The second clamp 21 includes a second clamp portion 201 and a third clamp portion 202, and the second clamp fitting 22 includes a second clamp fitting portion 203 and a third clamp fitting portion 204. The second clamping portion 201 is disposed opposite to the second clamping engagement portion 203 to form a second clamping space 2001 between the second clamping portion 201 and the second clamping engagement portion 203. The third clamping portion 202 is disposed opposite to the third clamping engagement portion 204 to form a third clamping space 2002 between the third clamping portion 202 and the third clamping engagement portion 204.

It will be appreciated that the first clamping portion 101 and the first clamping engagement 102 are end effector portions of the first clamping member 11 and the first clamping engagement 12, respectively, for contacting and clamping an object. The first clamping portion 101 and the first clamping engagement portion 102 may have various forms of structures, such as a tooth structure, a concave-convex structure, a frosted structure, a surface structure, a groove structure, and the like, but are not limited thereto. The structures of the first clamping portion 101 and the first clamping engagement portion 102 may be the same or different.

Similarly, the second clamping portion 201 and the second clamping engagement portion 203 are end effector portions of the second clamping member 21 and the second clamping engagement member 22, respectively, for contacting and clamping an object, and the third clamping portion 202 and the third clamping engagement portion 204 are end effector portions of the second clamping member 21 and the second clamping engagement member 22, respectively, for contacting and clamping an object. The second clamping portion 201, the second clamping engagement portion 203, the third clamping portion 202, and the third clamping engagement portion 204 may each be of various forms, for example, a tooth structure, a concave-convex structure, a frosted structure, a surface structure, a groove structure, or the like, but are not limited thereto. The structures of the second clamping portion 201 and the second clamping engagement portion 203 may be the same or different, and the structures of the third clamping portion 202 and the third clamping engagement portion 204 may be the same or different.

It should be understood that the structures of the second clamping portion 201 and the third clamping portion 202 are not identical, i.e., the shapes and configurations of both the second clamping portion 201 and the third clamping portion 202 are not identical. The structures of the second and third clamping fittings 203 and 204 are different, that is, the shapes and configurations of the second and third clamping fittings 203 and 204 are different. The structural form of the structural member that can be clamped by the second clamping portion 201 and the second clamping matching portion 203 is different from the structural form of the structural member that can be clamped by the third clamping portion 202 and the third clamping matching portion 204.

When the first structural member needs to be clamped, the first clamping member 11 and the first clamping matching member 12 of the first clamping mechanism 10 move relatively, so that the distance between the first clamping portion 101 and the first clamping matching portion 102 is changed (the size of the first clamping space 1001 is changed), and the first clamping portion 101 and the first clamping matching portion 102 can clamp the first portion of the first structural member; the second clamping member 21 and the second clamping fitting 22 of the second clamping mechanism 20 move relatively so that the distance between the second clamping portion 201 and the second clamping fitting 203 changes (i.e., the size of the second clamping space 2001 changes), and the second clamping portion 201 and the second clamping fitting 203 can clamp the second portion of the first structural member.

When the second structural member needs to be clamped, the first clamping portion 101 and the first clamping matching portion 102 of the first clamping mechanism 10 can clamp the first portion of the second structural member, and the second clamping piece 21 and the second clamping matching piece 22 of the second clamping mechanism 20 can move relatively, so that the distance between the third clamping portion 202 and the third clamping matching portion 204 changes (the size of the third clamping space 2002 changes), and the third clamping portion 202 and the third clamping matching portion 204 can clamp the second portion of the second structural member.

Therefore, the first clamping mechanism 10 can clamp the structural member through the first clamping portion 101 and the first clamping matching portion 102, and the second clamping mechanism 20 can clamp the structural member through the second clamping portion 201 and the second clamping matching portion 203 or through the third clamping portion 202 and the third clamping matching portion 204, which is simple and reliable in structure compared with the structure that three or more clamping portions are simultaneously used for clamping the structural member.

It should be noted that the first clamping member 11 may include a plurality of first clamping portions 101, and the first clamping fitting member 12 may include a plurality of first clamping fitting portions 102, where the first clamping portions 101 are disposed opposite to the first clamping fitting portions 102 one by one. The structures of the first clamping portions 101 may be the same or different, and the structures of the first clamping engagement portions 102 may be the same or different.

Similarly, the second clamping member 21 may include a plurality of second clamping portions 201, and the second clamping fitting 22 may include a plurality of second clamping fitting portions 203, the second clamping portions 201 being disposed in one-to-one opposition to the second clamping fitting portions 203. The structures of the second clamping portions 201 may be the same or different, and the structures of the second clamping engagement portions 203 may be the same or different.

Likewise, the second clamping member 21 may include a plurality of third clamping portions 202, and the second clamping fitting 22 may include a plurality of third clamping fitting portions 204, where the third clamping portions 202 are disposed opposite to the third clamping fitting portions 204.

Next, the structure of the first clamping mechanism 10 will be described in detail.

Referring to fig. 1 to 3, fig. 2 shows a front view of the first clamping mechanism 10 shown in fig. 1, and fig. 3 shows a schematic perspective view of the first clamping mechanism 10 shown in fig. 1.

In some embodiments, the first clamping mechanism 10 further includes a first connecting shaft 13, and the first clamping member 11 is pivotally connected to the first clamping mating member 12 through the first connecting shaft 13.

It is understood that the first connecting shaft 13 may be a shaft formed separately from the first clamping member 11 and the first clamping mating member 12. For example, the first clamping member 11 and the first clamping matching member 12 may be respectively provided with shaft holes, and the first connecting shaft 13 may be disposed through the shaft holes of the first clamping member 11 and the first clamping matching member 12, so as to implement rotational connection between the first clamping member 11 and the first clamping matching member 12.

Of course, the first connecting shaft 13 may be an integral structure integrally formed with the first clamping member 11, the first clamping fitting 12 is provided with a shaft hole, and the first connecting shaft 13 is rotationally matched with the shaft hole on the first clamping fitting 12. Similarly, the first connecting shaft 13 may be an integral structure integrally formed with the first clamping fitting 12, the first clamping fitting 11 is provided with a shaft hole, and the first connecting shaft 13 is rotationally matched with the shaft hole on the first clamping fitting 11.

So configured, the first clamping member 11 and the first clamping matching member 12 are rotationally connected by the first connecting shaft 13, and when the first clamping member 11 and the first clamping matching member 12 relatively draw together and rotate based on the first connecting shaft 13, the first clamping portion 101 and the first clamping matching portion 102 can draw together relatively, that is, the distance between the two can be gradually reduced, so as to facilitate clamping of a structural member (for example, the first portion of the first structural member or the first portion of the second structural member); similarly, when the first clamping member 11 and the first clamping fitting 12 relatively rotate away from each other based on the first connecting shaft 13, the first clamping portion 101 and the first clamping fitting 102 may be relatively far away, i.e. the distance between the two may gradually increase, so as to facilitate loosening the structural member (e.g. the first portion of the first structural member or the first portion of the second structural member).

In addition, compared with the moving mode that the first clamping piece 11 and the first clamping matching piece 12 are relatively close to or far away from each other along the linear direction, the moving mode that the first clamping piece 11 and the first clamping matching piece 12 are rotationally connected is more suitable for clamping thinner objects (for example, sheet-shaped bodies or foil materials with the thickness smaller than 1 mm), the reliability of clamping the structural member can be improved, and the possibility that the structural member is separated from the first clamping mechanism 10 when the tensile testing equipment performs tensile testing on the structural member can be further reduced.

Referring to fig. 2 to 7, fig. 4 shows a schematic perspective view of the first clamping member 11 shown in fig. 3, fig. 5 shows a right side view of the first clamping member 11 shown in fig. 4, fig. 6 shows a schematic perspective view of the first clamping counterpart member 12 shown in fig. 3, and fig. 7 shows a schematic view of the first connecting shaft 13 shown in fig. 2.

Optionally, in some embodiments, one of the first clamping member 11 and the first clamping mating member 12 is provided with a first connecting portion 103 and a second connecting portion 104 at a distance, and the other one of the two is provided with a third connecting portion 105. The third connecting portion 105 is located between the first connecting portion 103 and the second connecting portion 104, and the third connecting portion 105 is pivotally connected to the first connecting portion 103 and the second connecting portion 104 through the first connecting shaft 13.

It is understood that the first, second and third connection parts 103, 104 and 105 may have various regular or irregular shapes, for example, but not limited to, a block structure, a plate structure, etc. The first connecting portion 103 may be integrally formed with the first clamping member 11 or the first clamping mating member 12, or may be separately formed and connected. The second connecting portion 104 may be integrally formed with the first clamping member 11 or the first clamping mating member 12, or may be separately formed and connected. The third connecting portion 105 may be integrally formed with the first clamping member 11 or the first clamping mating member 12, or may be separately formed and connected.

In this way, when the first clamping member 11 and the first clamping matching member 12 relatively rotate based on the first connecting shaft 13, the third connecting portion 105 rotates between the first connecting portion 103 and the second connecting portion 104, so that the reliability of the rotational connection between the first clamping member 11 and the first clamping matching member 12 can be improved.

Referring to fig. 2 to 7, optionally, a first through hole 1030 is formed on the first connecting portion 103, a second through hole 1050 is formed on the third connecting portion 105, and a first connecting hole 1040 is formed on the second connecting portion 104. The first connecting shaft 13 includes a first shaft portion 131 and a first head portion 132. The first shaft portion 131 is inserted through the first and second through holes 1030 and 1050 and connected to the first connection hole 1040. The first head 132 is connected to the first shaft 131 and abuts against a side of the first connection portion 103 facing away from the third connection portion 105.

It is understood that the first shaft portion 131 is a substantially shaft-like structure or a rod-like structure, and serves as a shaft for rotatably connecting the first connecting portion 103 and the third connecting portion 105, and for rotatably connecting the second connecting portion 104 and the third connecting portion 105. The first shaft portion 131 may be connected to the first connection hole 1040 by various connection methods, for example, the first shaft portion 131 may be connected to the first connection hole 1040 by a screw, in which case the first connection hole 1040 is a threaded hole, and the first shaft portion 131 is provided with an external thread that mates with an internal thread of the first connection hole 1040, for example, and the first shaft portion 131 and the first connection hole 1040 may be connected by a bolt, but not limited thereto.

The first head 132 may have various regular or irregular shapes, for example, a columnar structure, a block structure, a rod structure, or the like, but is not limited thereto, and may be abutted against a side of the first connection portion 103 facing away from the third connection portion 105 and abutted against the first connection portion 103 to perform a limiting function. For example, the first head 132 may be generally cylindrical, and the outer diameter of the first head 132 may be greater than the outer diameter of the first shaft portion 131, such that the first head 132 may abut against a side of the first connection portion 103 facing away from the third connection portion 105. The first shaft portion 131 and the first head portion 132 may be integrally formed as a single piece, or may be formed separately and connected.

So set up, when assembling first connecting axle 13, can make first shaft portion 131 of first connecting axle 13 wear to locate first through-hole 1030 and second through-hole 1050 and be connected with first connecting hole 1040, first head 132 can be located the one side that first connecting portion 103 was kept away from third connecting portion 105, can play the effect of spacing to first connecting axle 13 for the position of first connecting portion 103, it is convenient to assemble, do benefit to improvement first holder 11, first centre gripping cooperation piece 12 and first connecting axle 13 looks assembled convenience and connection reliability.

Of course, in other embodiments, the first connecting portion 103, the second connecting portion 104 and the third connecting portion 105 may not be provided, and the first connecting shaft 13 may be directly inserted into the first clamping member 11 and connected to the first clamping mating member 12.

Referring to fig. 2 and 3, optionally, in some embodiments, the first clamping mechanism 10 further includes a cushion member 14, wherein the cushion member 14 is located between the first clamping member 11 and the first clamping fitting 12 and is capable of moving relative to the first clamping member 11 and/or the first clamping fitting 12 in the first clamping space 1001.

It will be appreciated that the cushion member 14 is a structural member that is interposed between the first clamping member 11 and the first clamping counterpart 12, and may be of various regular or irregular shapes, for example, a block structure (this is shown in fig. 2 and 3 by way of example), a plate structure, a sheet structure, or the like, but is not limited thereto.

So set up, when first fixture 10 centre gripping structure promptly through first clamping part 11 and the relative draw close rotation of first centre gripping cooperation spare 12, so that first clamping part 11 and pad 14 centre gripping structure and/or make first centre gripping cooperation spare 12 and pad 14 centre gripping structure, the interval between first clamping part 11 and the pad 14 promptly is less than the interval between first clamping part 11 and the first centre gripping cooperation spare 12 when the centre gripping structure, the contained angle that forms between first clamping part 11 and the pad 14 promptly is less than the contained angle that forms between first clamping part 11 and the first centre gripping cooperation spare 12 when the centre gripping structure, compare in the case of not setting up the pad 14, be favorable to increasing the contact fit area between first fixture 10 centre gripping structure and the structure, and then be favorable to improving the centre gripping reliability, reduce the possibility that the structure breaks away from with first fixture 10 when tensile test equipment carries out tensile test to the structure, be particularly useful for centre gripping thinner object (for example the slice or the foil material that thickness is less than 1 mm).

For example, when the first structural member formed by welding the tab and the adapter piece needs to be subjected to a tensile test, the tab is suitable to be clamped by the first clamping member 11 and the pad member 14 and/or clamped by the first clamping mating member 12 and the pad member 14 due to the generally smaller thickness of the tab, and the second clamping mechanism 20 can clamp the adapter piece.

It should be noted that the cushion 14 is not necessary, and in other embodiments, the cushion 14 may not be provided.

Referring to fig. 2, 5 and 8, optionally, the first clamping portion 101 includes a plurality of first protrusions 1011, and the pad 14 includes a plurality of second protrusions 1401 disposed opposite to the first protrusions 1011. The first clamping engagement 102 includes a plurality of third protrusions 1021, and the pad 14 includes a plurality of fourth protrusions 1402 disposed opposite to the third protrusions 1021.

It is understood that the first protrusion 1011, the second protrusion 1401, the third protrusion 1021 and the fourth protrusion 1402 are all protruding structures, and may take various shapes, such as tooth structures, spike structures, bump structures, etc., but not limited thereto.

In this way, when the first clamping portion 101 and the cushion 14 clamp the structural member, that is, the first protrusion 1011 and the second protrusion 1401 clamp the structural member, the clamping reliability of the structural member can be improved compared to the planar and planar clamping structure. Similarly, when the first clamping matching portion 102 and the cushion 14 clamp the structural member, the clamping reliability of the structural member can be improved, and the details are not repeated here.

The structures of the first clamping portion 101, the first clamping engagement portion 102, and the pad 14 are not limited thereto.

In other embodiments, it may be that the first clamping portion 101 includes a first protrusion 1011 and the pad 14 includes a second protrusion 1401; while the first clamping engagement 102 does not include the third protrusion 1021 and the pad 14 does not include the fourth protrusion 1402, other configurations are possible.

In other embodiments, it may be that the first clamp mating portion 102 includes a third protrusion 1021 and the pad 14 includes a fourth protrusion 1402; while the first clamping portion 101 does not include the first projection 1011 and the pad 14 does not include the second projection 1401, other forms of structures are possible.

In other embodiments, the first clamping portion 101 may include a first protrusion 1011, and the pad 14 may not include a second protrusion 1401, but may be other forms of structures. Alternatively, the pad 14 includes the second protrusion 1401, and the first clamping portion 101 does not include the first protrusion 1011, but may be other forms of structures.

In other embodiments, the first clamping fit 102 may include a third protrusion 1021, and the pad 14 may not include a fourth protrusion 1402, but may be other forms of structures; alternatively, the pad 14 includes the fourth protrusion 1402, and the first clamp fitting portion 102 does not include the third protrusion 1021, but may have other structures.

Referring to fig. 2, 4, 5 and 8, the first protrusion 1011, the second protrusion 1401, the third protrusion 1021 and the fourth protrusion 1402 may be saw-tooth protrusions, i.e. protrusions having a substantially saw-tooth shape.

So set up, when first fixture 10 centre gripping structure promptly through zigzag protrusion and structure contact and the application of force to the structure, be favorable to increasing with the frictional force between the structure, and then be favorable to improving the centre gripping reliability of structure.

Of course, the shape and structure of the first boss 1011, the second boss 1401, the third boss 1021, and the fourth boss 1402 are not limited thereto.

In other embodiments, the first protrusions 1011 and the second protrusions 1401 may be saw-tooth protrusions, while the third protrusions 1021 and the fourth protrusions 1402 are not saw-tooth protrusions, and may be protrusions of other shapes and structures.

In other embodiments, the third protrusion 1021 and the fourth protrusion 1402 may be saw-tooth protrusions, and the first protrusion 1011 and the second protrusion 1401 are not saw-tooth protrusions, but may be protrusions of other shapes and structures.

In other embodiments, one of the first protrusion 1011 and the second protrusion 1401 may be a saw-tooth protrusion, while the other of the two may be protrusions of other shape structures.

In other embodiments, one of the third protrusion 1021 and the fourth protrusion 1402 may be a saw-tooth protrusion, while the other of the two is a protrusion of other shape structure.

Referring to fig. 2 and 5, alternatively, the first protrusions 1011 may be arranged in an array, for example, in a rectangular array, a circular array, or in an array according to a predetermined shape or path.

So set up, each first protruding 1011 can arrange along at least two different directions and set up, compare in only arranging along a direction and set up, be favorable to improving the distribution dispersion degree of first protruding 1011, and then be favorable to further improving the centre gripping firm nature of structural component.

Similarly, the second protrusions 1401 may be disposed in an array, the third protrusions 1021 may be disposed in an array, and the fourth protrusions 1402 may be disposed in an array, which will not be described herein.

Referring to fig. 1 to 3, optionally, the first clamping mechanism 10 further includes a first locking member 15, where the first locking member 15 is adjustably connected to the first clamping member 11 and the first clamping fitting 12, for adjusting a distance between the first clamping portion 101 and the first clamping fitting 102.

It will be appreciated that the first locking member 15 is a structure capable of applying a force to the first clamping member 11 and the first clamping counterpart 12 to maintain the clamped state therebetween, and may be a locking structure of various forms, such as a threaded fastener (e.g., screw, bolt, etc.), a clip, etc., but is not limited thereto. The first locking member 15 is adjustably connected to the first clamping member 11 and the first clamping fitting 12, which means that the first locking member 15 can move relative to the first clamping member 11 and the first clamping fitting 12 to adjust the spacing or clamping force between the first clamping member 11 and the first clamping fitting 12, thereby adjusting the size of the first clamping space 1001.

So set up, through adjusting first retaining member 15, can adjust the clamping force between first clamping member 11 and the first clamping cooperation spare 12 to first clamping member 11 and the first clamping cooperation spare 12 centre gripping or the structure of unloading.

Illustratively, when the cushion member 14 is disposed between the first clamping member 11 and the first clamping mating member 12, by adjusting the first locking member 15, the clamping force between the first clamping member 11 and the first clamping mating member 12 can be adjusted, so that the first clamping member 11 and the cushion member 14 clamp or release the structural member and/or the first clamping mating member 12 and the cushion member 14 clamp or release the structural member.

Referring to fig. 2, optionally, pad 14 may be coupled to first locking member 15. In this way, the first locking member 15 can provide connection and support for the cushion member 14 in addition to the locking function, which is beneficial to improving the reliability of the cushion member 14, improving the compactness of the first clamping mechanism 10, and facilitating the movement of the cushion member 14 relative to the first clamping member 11 and the first clamping mating member 12.

Referring to fig. 2 to 6, optionally, the first clamping fitting 12 is provided with a third through hole 120, and the first clamping fitting 11 is provided with a second connecting hole 110. The first locking member 15 includes a first lever portion 151 and a first stopper portion 152. The first rod 151 is inserted into the third through hole 120 and is in threaded connection with the second connecting hole 110; the first rod 151 is clearance fitted with the third through hole 120. The first limiting portion 152 is connected to the first rod portion 151, and is used for abutting against a side of the first clamping fitting 12 facing away from the pad 14.

It will be appreciated that the first rod 151 is substantially rod-shaped, and since the first rod 151 is screwed with the second connecting hole 110, the first rod 151 is provided with external threads that mate with internal threads of the second connecting hole 110. The first limiting portion 152 may have various regular or irregular shapes, for example, a columnar structure, a block structure, a rod structure, etc., but is not limited thereto, as long as it can be located on a side of the first clamping counterpart 12 facing away from the pad 14 to perform a limiting function. For example, the first limiting portion 152 may be substantially cylindrical, and the outer diameter of the first limiting portion 152 may be greater than the outer diameter of the first rod portion 151, so that the first limiting portion 152 can abut against a side of the first clamping fitting 12 facing away from the pad 14. The first rod 151 is in clearance fit with the third through hole 120, so that when the first clamping member 11 and the first clamping member 12 relatively rotate based on the first connecting shaft 13, clamping stagnation is not easy to occur between the first rod 151 and the first clamping member 12. The third through-hole 120 may be a circular hole, an elliptical hole, or another shaped hole.

So set up, through screwing first pole portion 151, first pole portion 151 and second connecting hole 110 screw thread are closed, and first spacing portion 152 butt is in the one side of first centre gripping cooperation spare 12 back to pad 14, can form the drawknot effect to first centre gripping spare 11 and first centre gripping cooperation spare 12, makes the distance between first centre gripping spare 11 and the first centre gripping cooperation spare 12 reduce gradually to first centre gripping spare 11 and first centre gripping cooperation spare 12 centre gripping structure. By screwing the first rod 151 in the opposite direction, the clamping force between the first clamping member 11 and the first clamping engagement member 12 can be removed, so that the first clamping member 11 and the first clamping engagement member 12 release the structural member. Therefore, the first locking member 15 is simple and reliable in structure, and can conveniently adjust the clamping force between the first clamping member 11 and the first clamping mating member 12.

Referring to fig. 2-6, and 8, fig. 8 shows a left side view of the cushion 14 shown in fig. 2. For example, when the pad 14 is disposed between the first clamping member 11 and the first clamping matching member 12, the fourth through hole 401 may be formed in the pad 14, and the first rod 151 may be disposed through the third through hole 120 and the fourth through hole 401 and be in threaded connection with the second connecting hole 110. The first rod 151 is clearance fit with the fourth through hole 401.

It can be understood that the first rod 151 is in clearance fit with the fourth through hole 401, so that the first clamping member 11 and the first clamping member 12 are not easy to be jammed between the first rod 151 and the pad member 14 when relatively rotated based on the first connecting shaft 13. The fourth through hole 401 may be a circular hole, an elliptical hole, or a hole of other shape.

So configured, by screwing the first rod 151 such that the distance between the first clamping member 11 and the first clamping fitting 12 is gradually reduced, the distance between the cushion member 14 and the first clamping member 11 and the distance between the cushion member 14 and the first clamping fitting 12 are also gradually reduced, so that the first clamping member 11 and the cushion member 14 clamp the structural member and/or the first clamping fitting 12 and the cushion member 14 clamp the structural member. By reversing the screwing of the first stem 151, the clamping force between the first clamping member 11 and the first clamping engagement member 12 may be removed to facilitate releasing the first clamping member 11 from the cushion member 14 and/or releasing the first clamping engagement member 12 from the cushion member 14. And, the engagement between the pad 14 and the first lever portion 151 is facilitated.

Referring to fig. 2 and 3, optionally, the first clamping mechanism 10 may further include a first screwing piece 16, where the first screwing piece 16 is disposed on the first limiting portion 152.

It will be appreciated that the first screw 16 may be a variety of regularly or irregularly shaped structures, such as, but not limited to, rod-like structures (i.e., the first screw 16 is illustratively shown as a ball-point rod), block-like structures, and the like. The first screwing piece 16 may be movably connected or fixedly connected to the first limiting portion 152.

By rotating the first screwing piece 16, the first limiting portion 152 and the first rod portion 151 can be driven to rotate, so that the first rod portion 151 can be driven to rotate more labor-saving.

Referring to fig. 2 to 4, optionally, in some embodiments, the first clamping member 11 includes a first connecting section 111 and a second connecting section 112, and one end of the first connecting section 111 is pivotally connected to one end of the first clamping mating member 12 through a first connecting shaft 13. One end of the second connecting section 112 is connected with the other end of the first connecting section 111 in a bending manner. The other end of the second connecting section 112 is provided with a first clamping portion 101. The first clamping mechanism 10 further comprises a second connecting shaft 17, the second connecting shaft 17 being connected to the first connecting section 111.

It will be appreciated that the first connecting section 111 and the second connecting section 112 are part of the first clamping member 11, and may have various regular or irregular shapes, such as a block structure, a plate structure, a rod structure, a bent structure, etc., but not limited thereto. The first connecting section 111 and the second connecting section 112 may be integrally formed as a single piece, or may be formed separately and connected. The first connecting section 111 and the second connecting section 112 are bent and connected, that is, the structure formed at the connection part of the first connecting section 111 and the second connecting section 112 is bent, that is, an included angle is formed between the first connecting section 111 and the second connecting section 112, and the specific bending angle can be set according to actual needs.

In this way, when the first clamping mechanism 10 needs to be connected to an external device (for example, a tensile machine of a tensile testing apparatus), the connecting member of the external device may be connected to the second connecting shaft 17. Since the first connecting section 111 and the second connecting section 112 are bent, the first connecting section 111 can provide the second connecting shaft 17 with installation, and the second connecting section 112 can provide the first clamping portion for being matched with the first clamping matching piece 12.

Referring to fig. 2 to 4, optionally, the first connecting section 111 includes a first surface 1111, a second surface 1112, and a third surface 1113, and the first surface 1111 faces away from the first clamping portion 101; along the axial direction (i.e., the direction in which the axis is located) of the second connecting shaft 17, the second surface 1112 and the third surface 1113 are located on opposite sides of the first surface 1111, respectively. The first surface 1111 is provided with a connection groove 1101, the second surface 1112 is provided with a connection through hole 1102 communicating with the connection groove 1101, and the third surface 1113 is provided with a third connection hole 1103 communicating with the connection groove 1101. The second connection shaft 17 is inserted through the connection through hole 1102 and the connection groove 1101 and is connected to the third connection hole 1103.

It is understood that the second connection shaft 17 and the third connection hole 1103 may be connected by various means, such as a screw connection, a latch connection, etc., but not limited thereto.

When the first clamping mechanism 10 is required to be connected with an external device (for example, a tensile machine of tensile testing equipment), the connecting component of the external device can be connected with the second connecting shaft 17 in the connecting groove 1101, and the second connecting shaft 17 penetrates through the connecting through hole 1102 and the connecting groove 1101 and is connected with the third connecting hole 1103, so that assembly can be realized, and convenience and reliability of assembly can be improved.

Referring to fig. 3 and 4, optionally, the second connecting section 112 is provided with a second connecting hole 110 for connecting with the first rod portion 151.

Next, the structure of the second clamping mechanism 20 will be described in detail.

Referring to fig. 9 to 13, fig. 9 shows a schematic perspective view of the second clamping mechanism 20 shown in fig. 1, fig. 10 shows a front view of the second clamping member 21 shown in fig. 9, fig. 11 shows a right side view of the second clamping member 21 shown in fig. 9, fig. 12 shows a front view of the second clamping fitting 22 shown in fig. 9, and fig. 13 shows a left side view of the second clamping fitting 22 shown in fig. 9.

Optionally, in some embodiments, the second clamp portion 201 includes a plurality of fifth protrusions 2011 and the second clamp mating portion 203 includes a plurality of sixth protrusions 2031. The third clamping portion 202 is a first groove, and the third clamping mating portion 204 is a second groove.

It is to be understood that the fifth protrusion 2011 and the sixth protrusion 2031 are protruding structures, and may take various shapes, such as tooth structures, spike structures, bump structures, etc., but not limited thereto. The side of the second clamping member 21 facing the second clamping fitting 22 may be recessed to form the first groove, the side of the second clamping fitting 22 facing the second clamping member 21 may be recessed to form the second groove, and the first groove and the second groove may be disposed opposite to each other. The first and second grooves accommodate and limit the portion of the structural member (e.g., the second portion of the second structural member).

By the arrangement of the fifth protrusion 2011 and the sixth protrusion 2031, the reliability of clamping the structural member can be improved, and the clamping device is particularly suitable for clamping the sheet-shaped body with smaller thickness. For example, when a tensile test is required to be performed on a structural member formed by welding the tab and the tab, the tab can be clamped by the first clamping portion 101 and the pad 14 and/or the first clamping portion 102 and the pad 14, and the tab can be clamped by the second clamping portion 201 and the second clamping portion 203.

Since the third clamping portion 202 and the third clamping engagement portion 204 are both grooves, they are suitable for clamping a plate-like or block-like body having a certain thickness, compared to a protruding structure. For example, when a tensile test is required to be performed on a structural member formed by welding the adapting piece and the top cover, the adapting piece can be clamped by the first clamping portion 101 and the pad 14 and/or the first clamping matching portion 102 and the pad 14, and the top cover can be clamped by the third clamping portion 202 and the third clamping matching portion 204, so that the top cover can be limited by the first groove and the second groove, which is beneficial to improving the reliability of clamping.

Referring to fig. 10 and 12, the fifth protrusion 2011 and the sixth protrusion 2031 may alternatively be saw-tooth protrusions, i.e., protrusions having a substantially saw-tooth shape.

So set up, when the second fixture 20 centre gripping structure promptly through zigzag protrusion and structure contact and the application of force to the structure, be favorable to increasing with the frictional force between the structure, and then be favorable to improving the centre gripping reliability of structure.

Of course, in other embodiments, the fifth protrusion 2011 may be a saw-tooth protrusion, and the sixth protrusion 2031 may be a protrusion of other shapes. Alternatively, the sixth protrusion 2031 may be a zigzag protrusion, and the fifth protrusion 2011 may be a protrusion of another shape.

Referring to fig. 10 and 11, the fifth protrusions 2011 may alternatively be arranged in an array, for example, in a rectangular array, a circular array, or in an array according to a predetermined shape or path.

So set up, each fifth protruding 2011 can arrange the setting along two at least different directions, compares in arranging the setting along only one direction, is favorable to improving the distribution dispersion degree of fifth protruding 2011, and then is favorable to further improving the centre gripping firm nature of structural component.

Similarly, the sixth protrusions 2031 may also be arranged in an array, and will not be described here.

Referring to fig. 9 to 13, alternatively, the first groove may extend along the width direction a of the second clamping member 21, and may penetrate through two opposite sides of the second clamping member 21 in the width direction a to form a through groove; the second groove may extend along the width direction of the second clamping fitting 22, and may penetrate through two opposite sides of the second clamping fitting 22 in the width direction to form a through groove. Therefore, when the first groove and the second groove are matched to clamp the second part of the second structural member, the possibility of interference with the structural member can be reduced, and the second part of the second structural member can be conveniently arranged.

It will be appreciated that the width direction a of the second clamping member 21 is perpendicular to the height direction B and the thickness direction C of the second clamping member 21, the thickness direction C of the second clamping member 21 being substantially parallel to the direction in which the second clamping member 21 is directed towards the second clamping partner 22, the height direction B of the second clamping member 21 being substantially parallel to the direction in which the second clamping mechanism 20 is directed towards the first clamping mechanism 10. The width direction of the second clamping fitting 22 is substantially parallel to the width direction a of the second clamping fitting 21, the height direction of the second clamping fitting 22 is substantially parallel to the height direction B of the second clamping fitting 21, and the thickness direction of the second clamping fitting 22 is substantially parallel to the thickness direction C of the second clamping fitting 22.

Referring to fig. 1, 9, 10 and 12, optionally, an inlet 2003 is formed between the second clamping member 21 and the second clamping mating member 22 for the structural member to extend into the second clamping space 2001 or the third clamping space 2002. The fifth protrusion 2011 is located at a side of the inlet 2003 and the first recess is located at a side of the fifth protrusion 2011 remote from the inlet 2003. The sixth protrusion 2031 is located on a side of the inlet 2003 and the second recess is located on a side of the sixth protrusion 2031 remote from the inlet 2003.

It will be appreciated that the inlet 2003 is an opening formed between the second clamping member 21 and the second clamping engagement member 22, and the inlet 2003 is located on the side of the second clamping mechanism 20 facing the first clamping mechanism 10 when the first clamping mechanism 10 and the second clamping mechanism 20 are co-clamped at two different locations of a structural member. The inlet 2003, the fifth protrusion 2011 and the first recess are arranged in this order, i.e. substantially in the height direction B of the second clamping fitting 21, and the inlet 2003, the sixth protrusion 2031 and the second recess are arranged in this order, i.e. substantially in the height direction of the second clamping fitting 22.

So configured, the fifth protrusion 2011 is located on the outer side of the second clamp member 21 (the side closer to the first clamp mechanism 10 and the inlet 2003) with respect to the first recess, the sixth protrusion 2031 is located on the outer side of the second clamp fitting 22 (the side closer to the first clamp mechanism 10 and the inlet 2003) with respect to the second recess, and thus the second clamp space 2001 is located closer to the inlet 2003 with respect to the third clamp space 2002. When the structural member is inserted between the second clamping member 21 and the second clamping fitting 22 from the inlet 2003, i.e. first into the second clamping space 2001, it is further convenient for the second clamping portion 201 and the second clamping fitting 203, which comprise protrusions, to clamp the sheet. When the structural member needs to be clamped by the third clamping space 2002, the structural member passes through the inlet 2003 and the second clamping space 2001, and the second clamping portion 201 and the second clamping matching portion 203 can play a certain limiting role on the structural member.

The positions of the second clamping portion 201 and the third clamping portion 202 are not limited thereto, and the positions of the second clamping engagement portion 203 and the third clamping engagement portion 204 are not limited thereto.

Alternatively, in other embodiments, the positions of the second clamping portion 201 and the third clamping portion 202 may be exchanged, and the positions of the corresponding second clamping engagement portion 203 and the third clamping engagement portion 204 may be exchanged.

Alternatively, in other embodiments, the second clamping portion 201 and the third clamping portion 202 may be disposed in parallel along the width direction a of the second clamping member 21, and the corresponding second clamping engagement portion 203 and the third clamping engagement portion 204 may be disposed in parallel along the width direction of the second clamping engagement member 22.

Referring to fig. 1 and 9, in some embodiments, the second clamping mechanism 20 further includes a second locking member 23, where the second locking member 23 is adjustably connected to the second clamping member 21 and the second clamping fitting 22 for adjusting the distance between the second clamping member 21 and the second clamping fitting 22, and thus adjusting the size of the second clamping space 2001 and the size of the third clamping space 2002.

It will be appreciated that the second locking member 23 is a structure capable of applying a force to the second clamping member 21 and the second clamping counterpart 22 to maintain the clamped state thereof, and may be a locking structure of various forms, such as a threaded fastener (e.g., screw, bolt, etc.), a clip, etc., but is not limited thereto. The second locking member 23 is adjustably connected to the second clamping member 21 and the second clamping fitting 22, which means that the first locking member 15 is movable relative to the second clamping member 21 and the second clamping fitting 22 to adjust the spacing or clamping force between the second clamping member 21 and the second clamping fitting 22.

So configured, by adjusting the second locking member 23, the clamping force between the second clamping member 21 and the second clamping engagement member 22 can be adjusted, so that the second clamping portion 201 and the second clamping engagement portion 203 clamp or release the second portion of the first structural member, and the third clamping portion 202 and the third clamping engagement portion 204 clamp or release the second portion of the second structural member.

Referring to fig. 9, 11 and 13, optionally, in some embodiments, a fifth through hole 220 is formed in the second clamping fitting 22, and a fourth connecting hole 210 is formed in the second clamping fitting 21. The second locking member 23 includes a second rod portion 231 and a second limiting portion 232, where the second rod portion 231 is disposed through the fifth through hole 220 and is in threaded connection with the fourth connecting hole 210. The second limiting portion 232 is connected to the second rod portion 231 and is used for abutting against a side of the second clamping fitting 22 facing away from the second clamping fitting 21.

It will be appreciated that the second rod 231 has a substantially rod-shaped structure, and since the second rod 231 is screwed with the fourth connecting hole 210, the second rod 231 is provided with external threads that mate with internal threads of the fourth connecting hole 210. The second limiting portion 232 may have various regular or irregular shapes, such as a column structure, a block structure, a rod structure, etc., but is not limited thereto, as long as it can be located at a side of the second clamping counterpart 22 facing away from the second clamping counterpart 21 to perform a limiting function.

So set up, through screwing second pole portion 231, second pole portion 231 and fourth connecting hole 210 screw thread are closed, and second spacing portion 232 butt second centre gripping cooperation spare 22 is facing away from one side of second centre gripping spare 21, can form the drawknot effect to second centre gripping spare 21 and second centre gripping cooperation spare 22, make the distance between second centre gripping spare 21 and the second centre gripping cooperation spare 22 reduce gradually to the second position of second centre gripping portion 201 and second centre gripping cooperation portion 203 centre gripping first structure, or the second position of the centre gripping second structure of third centre gripping portion 202 and third centre gripping cooperation portion 204 centre gripping. By screwing the second lever 231 in the opposite direction, the clamping force between the second clamping member 21 and the second clamping engagement member 22 can be removed to facilitate the second clamping portion 201 and the second clamping engagement portion 203 to loosen the second portion of the first structural member or to facilitate the third clamping portion 202 and the third clamping engagement portion 204 to loosen the second portion of the second structural member. Therefore, the second locking member 23 has a simple and reliable structure, and can conveniently adjust the clamping force between the second clamping member 21 and the second clamping mating member 22.

Referring to fig. 9, optionally, the second clamping mechanism 20 may further include a second screwing piece 26, where the second screwing piece 26 is disposed on the second limiting portion 232.

It will be appreciated that the second screw 26 may be a variety of regularly or irregularly shaped structures, such as, but not limited to, rod-like structures (in fig. 9, where the second screw 26 is illustratively shown as a ball stud), block-like structures, and the like. The second screwing piece 26 may be movably connected or fixedly connected to the first limiting portion 152.

By rotating the second screwing piece 26, the second limiting portion 232 and the second rod portion 231 can be driven to rotate, so that the second rod portion 231 can be driven to rotate more labor-saving.

Referring to fig. 9, 11 and 13, optionally, along the height direction B of the second clamping member 21, the fourth connecting hole 210 is located at a side of the second clamping portion 201 and the third clamping portion 202 away from the inlet 2003. The fifth through hole 220 is located at a side of the second and third clamp fittings 203 and 204 away from the inlet 2003 in the height direction of the second clamp fitting 22.

Thus, the fourth connecting hole 210, the fifth through hole 220 and the second rod 231 are not easy to affect the clamping structure of the second clamping portion 201 and the second clamping matching portion 203, and are not easy to affect the clamping structure of the third clamping portion 202 and the third clamping matching portion 204.

Referring to fig. 1 and 9, in some embodiments, the second clamping mechanism 20 further includes a support base 24 and a guide member 25, and the guide member 25 is disposed on the support base 24. Wherein the second clamping member 21 and the second clamping counterpart 22 are slidably arranged on the guide member 25.

It will be appreciated that the support base 24 is a supporting structure and may be of various regular or irregular shapes, such as, but not limited to, a block structure, a plate structure, a frame structure, etc. The guide 25 is a structural member that guides the movement of the second clamp 21 and the second clamp counterpart 22, and may be, for example, a guide bar, a guide rail, a guide groove, or the like, but is not limited thereto.

So configured, the support base 24 can provide support and mounting for the guide 25, the second clamp 21, and the second clamp mating member 22. When the second clamping member 21 and the second clamping matching member 22 relatively move, the second clamping member 21 and the second clamping matching member 22 can move along the guiding direction of the guiding member 25, which is beneficial to improving the stability of the relative movement of the second clamping member 21 and the second clamping matching member 22.

Referring to fig. 9, optionally, in some embodiments, the guide 25 includes a plurality of sliding bars 251, a plurality of first sliding holes 2101 are formed on the second clamping member 21, a plurality of second sliding holes 2201 are formed on the second clamping member 22, the number of the first sliding holes 2101, the number of the second sliding holes 2201 and the number of the sliding bars 251 are the same, and the first sliding holes 2101, the second sliding holes 2201 and the sliding bars 251 are in one-to-one correspondence, and the sliding bars 251 are disposed through the first sliding holes 2101 and the second sliding holes 2201. The second clamping piece 21 slides on the sliding rod 251 through the first sliding hole 2101, and the second clamping matching piece 22 slides on the sliding rod 251 through the second sliding hole 2201, and the number of the sliding rods 251 is multiple, so that the positioning of the moving directions of the second clamping piece 21 and the second clamping matching piece 22 is facilitated, and the stability of the second clamping piece 21 and the second clamping matching piece 22 during sliding is facilitated to be improved.

Referring to fig. 9, alternatively, the support base 24 may include a base 241, a first supporting portion 242 and a second supporting portion 243 disposed on the base 241 at intervals, the first supporting portion 242 and the second supporting portion 243 are disposed opposite to each other, and the guide 25 is disposed on the first supporting portion 242 and the second supporting portion 243. The second clamp 21 and the second clamp fitting 22 are movable between the first support 242 and the second support 243.

Referring to fig. 1 and 9, optionally, the second clamping mechanism 20 may further include a connecting member 27, where the connecting member 27 is disposed on a side of the supporting seat 24 opposite to the second clamping member 21, and is used for connecting with an external object, so as to facilitate connection between the second clamping mechanism 20 and the external object.

Referring to fig. 1, in some embodiments, the first clamping mechanism 10 is capable of moving toward or away from the second clamping mechanism 20 to facilitate pulling a first portion of a first structural member clamped by the first clamping mechanism 10 and a second portion of a first structural member clamped by the second clamping mechanism 20, or pulling a first portion of a second structural member clamped by the first clamping mechanism 10 and a second portion of a second structural member clamped by the second clamping mechanism 20, thereby facilitating a tensile test.

The embodiment of the application further provides a tensile testing device, which comprises a tensile machine and the clamping device 100 of any of the embodiments, wherein the first clamping mechanism 10 and/or the second clamping mechanism 20 are/is arranged on the tensile machine.

It will be appreciated that the tensile machine is a device for testing tensile forces and may be of various types. For example, the tensile machine may include a first connecting component and a second connecting component capable of moving relatively, where the first clamping mechanism 10 may be connected to the first connecting component, and the second clamping mechanism 20 may be connected to the second connecting component, and by moving the first connecting component and the second connecting component relatively away from each other, so as to drive the first clamping mechanism 10 and the second clamping mechanism 20 to move relatively away from each other, a tensile force of a first portion of the first structural member clamped by the first clamping mechanism 10 and a second portion of the first structural member clamped by the second clamping mechanism 20 may be tested, or a tensile force of a first portion of the second structural member clamped by the first clamping mechanism 10 and a second portion of the second structural member clamped by the second clamping mechanism 20 may be tested. The pulling machine may further include a driving mechanism for driving the first connecting member and the second connecting member to move relatively, and the driving mechanism may be various types of driving mechanisms, such as a ball screw mechanism, a cylinder mechanism, etc., but is not limited thereto.

Of course, only one of the first clamping mechanism 10 and the second clamping mechanism 20 may be provided on the tensile machine, and the other may be provided on another member, for example, may be fixed to an external support member.

Because the tensile testing apparatus provided in the embodiments of the present application adopts the clamping device 100 of the foregoing embodiments, the tensile testing apparatus also has the technical effects brought by the technical solution of the clamping device 100 of any one of the foregoing embodiments, which is not described herein again.

The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims

1. A clamping device, comprising:

2. The clamping device of claim 1, wherein the first clamping mechanism comprises a first clamping member and a first clamping engagement member; the first clamping piece comprises a first clamping part, the first clamping matching piece comprises a first clamping matching part, and the first clamping part and the first clamping matching part are oppositely arranged to form the first clamping space between the first clamping part and the first clamping matching part; the first clamping piece and the first clamping matching piece can move relatively so as to adjust the size of the first clamping space;

3. The clamping device of claim 2, wherein the first clamping mechanism further comprises a first connecting shaft, the first clamping member being pivotally connected to the first clamping mating member via the first connecting shaft.

4. A clamping device as claimed in claim 3, characterised in that one of the first clamping member and the first clamping counterpart member is provided with a first connection portion and a second connection portion at intervals, the other of the two being provided with a third connection portion; the third connecting part is positioned between the first connecting part and the second connecting part, and is pivoted with the first connecting part and the second connecting part through the first connecting shaft.

5. The clamping device according to claim 4, wherein a first through hole is formed in the first connecting portion, a second through hole is formed in the third connecting portion, and a first connecting hole is formed in the second connecting portion; the first connecting shaft includes:

6. A clamping device as claimed in claim 3, characterised in that the first clamping mechanism further comprises a pad located between the first clamping member and the first clamping partner and movable within the first clamping space relative to the first clamping member and/or the first clamping partner.

7. The clamping device of claim 6, wherein the first clamping portion comprises a plurality of first protrusions and the pad comprises a plurality of second protrusions disposed opposite the first protrusions; and/or

8. The clamping device of claim 7, wherein the first protrusion and/or the second protrusion are saw-tooth protrusions; and/or

The third protrusion and/or the fourth protrusion are saw-tooth protrusions.

9. The clamping device of any of claims 2 to 8, wherein the first clamping mechanism further comprises a first locking member adjustably connected to the first clamping member and the first clamping engagement member for adjusting a distance between the first clamping portion and the first clamping engagement portion.

10. The clamping device of claim 9, wherein a third through hole is formed in the first clamping fitting, and a second connecting hole is formed in the first clamping fitting; the first locking member includes:

11. The clamping device as claimed in any one of claims 3 to 8, wherein the first clamping member comprises:

12. The clamping device of claim 11, wherein the first connection section comprises a first face, a second face, and a third face, the first face facing away from the first clamping portion; the second surface and the third surface are respectively positioned at two opposite sides of the first surface along the axial direction of the second connecting shaft; the first surface is provided with a connecting groove, the second surface is provided with a connecting through hole communicated with the connecting groove, and the third surface is provided with a third connecting hole communicated with the connecting groove; the second connecting shaft penetrates through the connecting through hole and the connecting groove and is connected with the third connecting hole.

13. The clamping device of any of claims 2 to 8, wherein the second clamping portion comprises a plurality of fifth protrusions and the second clamping engagement portion comprises a plurality of sixth protrusions;

The third clamping part is a first groove, and the third clamping matching part is a second groove.

14. Clamping device according to claim 13, characterized in that the fifth projection and/or the sixth projection are saw-tooth projections.

15. A clamping device according to claim 13, wherein an inlet for the structural member to extend into the second clamping space or the third clamping space is formed between the second clamping member and the second clamping counterpart;

16. The clamping device as recited in any of claims 2 to 8, characterised in that the second clamping mechanism further comprises a second locking member adjustably connected to the second clamping member and the second clamping fitting for adjusting the distance between the second clamping member and the second clamping fitting for adjusting the dimensions of the second clamping space and the third clamping space.

17. The clamping device of claim 16, wherein a fifth through hole is formed in the second clamping fitting, and a fourth connecting hole is formed in the second clamping fitting; the second locking member includes:

18. The clamping device as recited in any of claims 2 to 8, characterised in that said second clamping mechanism further comprises:

a support base; and

the guide piece is arranged on the supporting seat;

19. A gripping device according to any of claims 2 to 8 characterised in that the first gripping means is movable towards or away from the second gripping means.

20. A tensile testing apparatus, comprising:

a pulling machine; and

the clamping device of any of claims 1 to 19, the first clamping mechanism and/or the second clamping mechanism being provided on the tensile machine.