CN218983708U - Clamp structure - Google Patents

Abstract

The application relates to the technical field of vehicle processing, in particular to a clamp structure. The clamp structure is used for welding the front floor of the vehicle and the cross beam. The clamp structure comprises a first clamping device, a second clamping device and a connecting component, wherein the first clamping device and the second clamping device are arranged at intervals, and the connecting component is respectively connected with the first clamping device and the second clamping device. The connecting assembly comprises a first connecting piece and a second connecting piece, one end of the first connecting piece is connected with the first clamping device, and one end of the second connecting piece is connected with the second clamping device. The second clamping device can drive the second connecting piece to be connected with or separated from the first connecting piece. The application has the advantages that: the novel seat has the advantages that the relative position between the cross beams can be guaranteed, the consistency of processed products is good, the stability is high, the precision requirement is met, the installation of subsequent seats is convenient, the production efficiency and the manufacturing quality can be improved, the structure is simple, and the cost can be reduced.

Description

Clamp structure

Technical Field

The application relates to the technical field of vehicle processing, in particular to a clamp structure.

Background

With the rapid development of the automobile industry, the requirements on the safety performance and the comfort level of the vehicle are also higher and higher.

The mounting of the front seats of the vehicle requires high accuracy to satisfy riding comfort. The front seats of a vehicle are usually fixed to both the front and rear cross members, which are welded to the front floor of the vehicle. Therefore, the welding quality and the welding precision between the front floor and the cross beam of the vehicle are required to be high.

In the welding process of the cross beam and the front floor, the corresponding clamp is required to be used for clamping, so that a user can conveniently process the front floor. However, the existing cross beam is basically in a left-right through mode, the length of the cross beam is long, and therefore the welding fixture is mostly designed into a structure with a long turning arm, so that the fixture is easy to shake, the clamping strength is obviously reduced, the consistency between the front cross beam and the rear cross beam after welding is poor, the seat is difficult to install, and the production efficiency and the manufacturing quality are seriously affected due to the fact that the wire stopping and repairing are needed.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a clip structure that can improve the consistency between the vehicle front floor and the cross member.

The clamp structure is used for welding a front floor of a vehicle and a cross beam and comprises a first clamping device, a second clamping device and a connecting component, wherein the first clamping device and the second clamping device are arranged at intervals, and the connecting component is respectively connected with the first clamping device and the second clamping device; the connecting assembly comprises a first connecting piece and a second connecting piece, one end of the first connecting piece is connected with the first clamping device, and one end of the second connecting piece is connected with the second clamping device; the second clamping device can drive the second connecting piece to be connected with or separated from the first connecting piece.

It will be appreciated that the first and second clamping means are used to position the cross-beam and the connecting assembly maintains the relative position between the first and second clamping means, thereby indirectly ensuring the consistency of the distance between the cross-beams. And along with the movement of the second clamping device, the second connecting piece can be automatically attached to the first connecting piece, so that the relative fixing of the positions between the first clamping device and the second clamping device is realized.

In one embodiment, the second connecting piece comprises a connecting plate and a limiting piece, and one end of the connecting plate is connected with the second clamping device; the limiting piece is positioned at one end of the connecting plate far away from the second clamping device and is connected with the connecting plate; the connecting plate can move along with the second clamping device and drive the limiting piece to be connected with or separated from the first connecting piece.

So set up, simple structure, the processing of being convenient for.

In one embodiment, the first connecting piece comprises a limiting protrusion, the limiting piece is provided with a limiting groove, and the limiting protrusion can be in limiting fit with the limiting groove.

So arranged, the first connector can be easily connected with the second connector.

In one embodiment, the width of the limiting protrusion is D1, and the width of the first connecting piece is D2, and D1/D2 is more than or equal to 0.6 and less than or equal to 0.8.

So set up, can effectively guarantee the intensity of connection.

In one embodiment, the connecting plate is provided with a plurality of through holes at intervals.

The weight of the connecting plate can be reduced, and the cost is reduced.

In one embodiment, the first clamping device and the second clamping device each comprise a fixed component, a clamping component and a pushing component, and the clamping component is hinged with the fixed component; the pushing component is respectively connected with the fixing component and the clamping component; the pushing assembly can drive the clamping assembly to rotate around the hinge point of the clamping assembly and the fixing assembly.

So set up, labour saving and time saving has reduced the processing degree of difficulty.

In one embodiment, the clamping assembly comprises a pressing arm, a first clamping piece and a second clamping piece, and the pressing arm is hinged with the pushing assembly and the fixing assembly respectively; the first clamping piece is positioned at one end of the pressing arm far away from the pushing component and is connected with the pressing arm; one end of the second clamping piece is connected with the pressing arm, and the second clamping piece and the first clamping piece are arranged at intervals.

So set up, the transverse position of assurance crossbeam on the preceding floor that can be better avoids the crossbeam to take place the slope to ensure the precision of installation.

In one embodiment, the clamping assembly further comprises a positioning pin, wherein the positioning pin is positioned on one side of the pressing arm and is connected with the pressing arm; the beam is provided with a pin hole, the positioning pin moves along with the pressing arm towards the direction close to the beam, and the positioning pin can penetrate into the pin hole.

By the arrangement, the reliability of the position of the cross beam can be further improved.

In one embodiment, the pushing assembly comprises a cylinder and a piston rod, and the cylinder is connected with the fixing assembly; one end of the piston rod is connected with the cylinder, and the other end of the piston rod is hinged with the pressing arm.

By the arrangement, the operation burden of a processing person can be reduced, and the processing efficiency is improved.

In one embodiment, the first clamping device and the second clamping device each further comprise a first positioning block and a second positioning block, the first positioning block is located between the clamping assembly and the fixing assembly, and one side of the first positioning block is connected with the clamping assembly; the second positioning block is positioned between the clamping assembly and the fixing assembly, and one side of the second positioning block is connected with the fixing assembly; the first positioning block can be in limit fit with the second positioning block so as to limit the clamping assembly to move in the direction close to the fixing assembly.

So set up, can avoid the clamping component to produce rocking with respect to the fixed subassembly, further guarantee machining precision.

Compared with the prior art, the fixture structure that this application provided can guarantee the relative position between the crossbeam, and the product uniformity after the processing is better, and stability is high, satisfies the precision demand, and the installation of follow-up seat of being convenient for can improve production efficiency and manufacturing quality, simple structure moreover can reduce cost.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a working schematic diagram of a clamp structure provided in the present application.

Fig. 2 is a schematic structural diagram of the fixture structure provided in the present application.

Fig. 3 is an enlarged view at a in fig. 2.

Fig. 4 is a front view of a first connector provided herein.

Fig. 5 is a side view of the clamp structure provided herein.

The symbols in the drawings are as follows:

100. a clamp assembly; 10. a clamp structure; 11. a first clamping device; 111. a fixing assembly; 1111. a main body portion; 1112. a support; 1113. a second mating member; 112. a clamping assembly; 1121. pressing an arm; 1122. a first clamping member; 1123. a second clamping member; 1124. a positioning pin; 1125. a handle; 113. a pushing assembly; 1131. a cylinder; 1132. a piston rod; 114. a first positioning block; 115. a second positioning block; 12. a second clamping device; 13. a connection assembly; 131. a first connector; 1311. a limit protrusion; 132. a second connector; 1321. a connecting plate; 1321a, through holes; 1322. a limiting piece; 1322a, limit grooves; 20. a work table; 30. an auxiliary clamp; 40. a front floor; 50. a cross beam; 51. a first cross beam; 52. a second cross beam; 53. and a pin hole.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

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

Referring to fig. 1, the present application provides a clamp structure 10, the clamp structure 10 being part of a clamp assembly 100 for welding a vehicle front floor 40 to a cross member 50. The fixture assembly 100 further includes a table 20 and a plurality of auxiliary fixtures 30, and the fixture structure 10 and the plurality of auxiliary fixtures 30 are mounted on the table 20.

In the present application, the two clamp structures 10 are symmetrically installed on two sides of the workbench 20 and cooperate with other auxiliary clamps 30 to realize positioning between the front floor 40 and the cross beam 50 of the vehicle, so as to facilitate subsequent welding.

In the prior art, a rotating arm type clamp is generally adopted, and the length of the clamp is longer. Therefore, the clamp is easy to shake, the clamping strength is obviously reduced, and the installation accuracy is reduced. If the intensity of the clamp is improved by increasing the weight, the clamp is excessively heavy, and the labor intensity of operators is improved. In this application, the length of the fixture structure 10 can be reduced to a certain extent by the fixture structure 10 which is symmetrically arranged, so that the weight of the fixture structure 10 is reduced, and the positioning accuracy is improved.

The cross member 50 on the vehicle front floor 40 includes a first cross member 51 and a second cross member 52, and the first cross member 51 and the second cross member 52 are disposed at an interval.

Referring to fig. 1 and 2, a clamp structure 10 provided in the present application includes a first clamping device 11, a second clamping device 12, and a connecting assembly 13. The first clamping device 11 and the second clamping device 12 are arranged at intervals, and the connecting assembly 13 is respectively connected with the first clamping device 11 and the second clamping device 12. When the clamp structure 10 is used for welding the front floor 40 and the cross beam 50 of a vehicle, the first clamping device 11 is used for positioning the first cross beam 51, the second clamping device 12 is used for positioning the second cross beam 52, and the connecting assembly 13 maintains the relative positions of the first clamping device 11 and the second clamping device 12, so that the consistency of the distance between the first cross beam 51 and the second cross beam 52 is indirectly ensured.

Further, the connecting assembly 13 includes a first connecting member 131 and a second connecting member 132, wherein one end of the first connecting member 131 is connected to the first clamping device 11, and one end of the second connecting member 132 is connected to the second clamping device 12. The second clamping device 12 can drive the second connecting piece 132 to be connected with or separated from the first connecting piece 131.

Thus, the operation is simple, and the second connecting piece 132 can be automatically attached to the first connecting piece 131 along with the movement of the second clamping device 12, so that the relative fixing of the positions between the first clamping device 11 and the second clamping device 12 is realized, the experience dependence on operators is low, and the labor cost can be reduced.

To sum up, the fixture structure 10 that this application provided can guarantee the relative position of first crossbeam 51 and second crossbeam 52, and the product uniformity after the processing is better, and stability is high, satisfies the precision demand, and the installation of follow-up seat of being convenient for can improve production efficiency and manufacturing quality, simple structure moreover can reduce cost.

Referring to fig. 2 and 3, the second connecting member 132 includes a connecting plate 1321 and a limiting member 1322, and one end of the connecting plate 1321 is connected to the second clamping device 12; the limiting member 1322 is located at an end of the connecting plate 1321 away from the second clamping device 12, and is connected to the connecting plate 1321. The connecting plate 1321 can move along with the second clamping device 12, and drives the limiting member 1322 to connect with or disconnect from the first connecting member 131.

Specifically, the connection plate 1321 has a "U" shape. Thus, the structure is simple and the processing is convenient.

To ensure a good connection strength, the height of the second clamping device 12 is high relative to the first clamping device 11. In this way, the connecting plate 1321 has a larger connecting area with the second clamping device 12, thereby improving the connection strength.

In an embodiment, the first connecting member 131 includes a limiting protrusion 1311, the limiting member 1322 is provided with a limiting groove 1322a, and the limiting protrusion 1311 can be in limiting fit with the limiting groove 1322 a.

By arranging the limiting protrusion 1311 and the limiting groove 1322a, the first connecting piece 131 can be easily connected with the second connecting piece 132, and the relative fixing of the positions between the first clamping device 11 and the second clamping device 12 is realized, so that the structure is simple, and the processing cost is low.

Further, the limit projection 1311 may be formed by partially protruding the first coupling member 131, or may be provided separately, as long as it can achieve the same effect.

Without being limited thereto, in other embodiments, the positions of the limit protrusion 1311 and the limit groove 1322a may be replaced. For example, the limiting protrusion 1311 is located on the limiting member 1322, and the limiting groove 1322a is located on the first connecting member 131, so that the limiting engagement can be achieved as well. The first connecting member 131 and the limiting member 1322 may also implement a limiting fit by other manners, which is not limited herein.

In an embodiment, referring to fig. 3, the limiting protrusion 1311 and the limiting groove 1322a are flush with the end surfaces of the first connecting member 131 and the second connecting member 132, respectively. Namely, the lengths of the limit projection 1311 and the limit groove 1322a are the same as those of the first connecting piece 131 and the second connecting piece 132, and L is equal to or greater than 60mm and equal to or less than 100mm. Thus, a larger contact area is formed between the limit projection 1311 and the limit groove 1322a, so that the connection strength is ensured. If L is more than 100mm, more materials are needed for processing, so that the processing cost is increased. If L < 60mm, the connection area is small, it is difficult to ensure the connection strength between the limit projection 1311 and the limit groove 1322a, thereby affecting the accuracy of the clip structure 10. Preferably, L is 80mm. Therefore, the strength and the reliability of connection can be effectively ensured. In other embodiments, the length of the limit protrusion 1311 and the limit groove 1322a may also be 70mm, 75mm, 85mm, 90mm, or the like.

Further, referring to fig. 4, since the limit projection 1311 and the limit groove 1322a are in a fit state, the dimensional relationships are substantially the same, and the limit projection 1311 is described herein as an example. Specifically, the width of the limit projection 1311 is D1, and the width of the first coupling member 131 is D2, 0.6.ltoreq.D1/D2.ltoreq.0.8. In this way, the limit projection 1311 occupies a proper range on the first connector 131, so that it has a good strength, and can maintain a good connection strength when the second connector 132 is connected with the limit member 1322. For example, the value of D1/D2 may be 0.66, 0.68, 0.7, 0.72, etc.

In this embodiment, the width of the first connector 131 is 30mm and the width of the limit projection 1311 is 20mm. In other embodiments, the first connector 131 and the limit projection 1311 may have other values as long as they can have the same effect.

Referring to fig. 2 and 3, the connecting plate 1321 is provided with a plurality of through holes 1321a spaced apart from each other. The provision of the through holes 1321a can reduce the weight of the connection plate 1321, reduce the use of materials, and thus reduce the cost.

In conclusion, the connecting assembly 13 that this application provided simple structure, processing cost is low, and is simple to use moreover, can also guarantee the precision of anchor clamps structure 10 simultaneously well, need not the follow-up detection methods detection such as utensil, three coordinate measurement of recycling, reduces operating procedure, reduces process time, promotes machining efficiency.

In this application, the first clamping device 11 and the second clamping device 12 have substantially the same structure, and the first clamping device 11 will be specifically described below as an example.

Referring to fig. 1-5, the first clamping device 11 includes a fixing component 111, a clamping component 112 and a pushing component 113.

The fixing component 111 includes a main body 1111 and a supporting component 1112, the clamping component 112 and the pushing component 113 are all connected with the main body 1111, one end of the supporting component 1112 far away from the main body 1111 is connected with the mounting table, and the fixing component 111 fixes the clamp structure 10 on the workbench 20, so as to avoid the clamp structure 10 from shaking, thereby affecting the positioning accuracy.

The clamping assembly 112 is hinged to the fixing assembly 111, and the clamping assembly 112 is located on a side of the fixing assembly 111 away from the table 20. The clamp assembly 112 ensures a relative fixation of the position between the front floor 40 and the cross member 50, avoiding shifting of the cross member 50 position, which could result in impact on subsequent seat installation.

The pushing assembly 113 is connected with the fixing assembly 111 and the clamping assembly 112 respectively. And the pushing component 113 can drive the clamping component 112 to rotate around the hinge point of the clamping component 112 and the fixing component 111. Thus, the time and labor saving effect can be achieved. With the aid of the pushing assembly 113, a worker can easily raise or lower the clamping assembly 112, thereby facilitating the ingress and egress of the front floor 40 and the cross member 50, and reducing the difficulty of machining.

When the clamping assembly 112 is lifted about the hinge point with the fixing assembly 111, i.e. the clamping assembly 112 moves away from the fixing assembly 111. At this time, the front floor 40 and the cross member 50 are easily moved in and out, and the front floor 40 and the cross member 50 are integrally moved out after the welding is completed.

When the clamping assembly 112 descends around the hinge point with the fixing assembly 111, i.e., the clamping assembly 112 moves toward the fixing assembly 111. At this time, the clamping assembly 112 and the remaining auxiliary clamps 30 can cooperate to fix the front floor 40 and the cross member 50, thereby ensuring the machining accuracy.

Further, the connecting component 13 is specifically mounted on the clamping component 112 and is mounted at an end of the clamping component 112 away from the pushing component 113 when connecting the first clamping device 11 and the second clamping device 12. In this way, the connecting component 13 can further reduce the shaking probability of the clamping component 112 and ensure the relative position between the first clamping device 11 and the second clamping device 12, so that the first cross beam 51 and the second cross beam 52 can both extend transversely along the front floor 40, and the interval between the longitudinal directions is kept the same, thereby improving the consistency of installation.

In one embodiment, the clamp assembly 112 includes a press arm 1121, a first clamp 1122, and a second clamp 1123. The pressing arm 1121 is hinged with the pushing component 113 and the fixing component 111 respectively; the first clamping member 1122 is positioned at one end of the pressing arm 1121 away from the pushing assembly 113 and is connected to the pressing arm 1121; one end of the second clamp 1123 is connected to the pressing arm 1121, and the second clamp 1123 is spaced apart from the first clamp 1122.

Specifically, the structures of the first clamping member 1122 and the second clamping member 1123 are adapted to the shape of the cross beam 50, and when the clamping assembly 112 descends, the first clamping member 1122 and the second clamping member 1123 can be driven by the pressing arm 1121 to abut against the cross beam 50 and press the cross beam 50 and the front floor 40. The first clamping piece 1122 and the second clamping piece 1123 which are arranged at intervals can better ensure the transverse position of the cross beam 50 on the front floor 40, and avoid the cross beam 50 from inclining, thereby ensuring the installation precision, facilitating the installation of the subsequent seats, reducing the repairing probability and ensuring the production efficiency and the manufacturing quality.

Further, the fixture assembly 100 further includes a first mating member (not shown), where one end of the first mating member is located on the table 20 and connected to the table 20, and the other end of the first mating member is disposed corresponding to the first clamping member 1122. Specifically, the first fitting member abuts against the front floor 40 and can be fitted with the first clamping member 1122, so that the front floor 40 and the cross member 50 are tightly attached to each other, thereby facilitating subsequent welding.

The fixing assembly 111 is connected with a second mating member 1113, and the second mating member 1113 is disposed corresponding to the second clamping member 1123 and can mate with the second clamping member 1123 to tightly attach the front floor 40 to the cross member 50, thereby facilitating subsequent welding.

Referring to fig. 2 and 5, the clamping assembly 112 further includes a positioning pin 1124, and the positioning pin 1124 is located on one side of the pressing arm 1121 and is connected to the pressing arm 1121. Wherein, the beam 50 is provided with a pin hole 53, and the positioning pin 1124 can be arranged in the pin hole 53 along with the movement of the pressing arm 1121 towards the direction approaching to the beam 50.

Thus, the beam 50 can be precisely positioned, the reliability of the position of the beam 50 is further improved, and the production efficiency and the manufacturing quality are ensured.

Further, the clamping assembly 112 further includes a handle 1125, and the handle 1125 is located at an end of the pressing arm 1121 remote from the fixing assembly 111 and is connected to the pressing arm 1121. In this manner, the clamping assembly 112 can be more easily rotated by the operator's grip.

In one embodiment, pushing assembly 113 includes a cylinder 1131 and a piston rod 1132. Cylinder 1131 is coupled to stationary assembly 111; piston rod 1132 is coupled to cylinder 1131 at one end and pressure arm 1121 at the other end. The piston rod 1132 is driven by the cylinder 1131 to assist the clamping assembly 112 to move around the hinge point with the fixing assembly 111, so that the operation burden of a processing person can be reduced, and the processing efficiency can be improved.

To limit the movement of the clamping assembly 112 toward the fixing assembly 111, in one embodiment, the first clamping device 11 and the second clamping device 12 each further include a first positioning block 114 and a second positioning block 115. The first positioning block 114 is located between the clamping assembly 112 and the fixing assembly 111, and one side of the first positioning block 114 is connected with the clamping assembly 112; the second positioning block 115 is located between the clamping assembly 112 and the fixing assembly 111, and one side of the second positioning block 115 is connected to the fixing assembly 111. The first positioning block 114 can be in limit fit with the second positioning block 115 to limit the movement of the clamping assembly 112 in a direction approaching the fixing assembly 111.

Specifically, the first positioning block 114 and the limiting member 1322 have substantially the same structure, the second positioning block 115 and the first connecting member 131 have substantially the same structure, and the clamping assembly 112 can be prevented from shaking relative to the fixing assembly 111 by the limiting fit of the first positioning block 114 and the second positioning block 115, so that the clamping assembly 112 is more stable, and the precision in processing can be further ensured.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of the present application is to be determined by the following claims.

Claims (10)

1. The clamp structure is used for welding a front floor (40) and a cross beam (50) of a vehicle and comprises a first clamping device (11), a second clamping device (12) and a connecting assembly (13), wherein the first clamping device (11) and the second clamping device (12) are arranged at intervals, and the connecting assembly (13) is respectively connected with the first clamping device (11) and the second clamping device (12);

characterized in that the connection assembly (13) comprises:

a first connecting piece (131), wherein one end of the first connecting piece (131) is connected with the first clamping device (11);

a second connecting member (132), one end of the second connecting member (132) being connected to the second clamping device (12);

the second clamping device (12) can drive the second connecting piece (132) to be connected with or separated from the first connecting piece (131).

2. The clamp structure of claim 1, wherein the second connector (132) comprises:

a connection plate (1321), one end of the connection plate (1321) being connected to the second clamping device (12);

a limiting piece (1322), wherein the limiting piece (1322) is positioned at one end of the connecting plate (1321) far away from the second clamping device (12) and is connected with the connecting plate (1321);

the connecting plate (1321) can move along with the second clamping device (12) and drive the limiting piece (1322) to be connected with or separated from the first connecting piece (131).

3. The fixture structure according to claim 2, wherein the first connecting member (131) comprises a limiting protrusion (1311), the limiting member (1322) is provided with a limiting groove (1322 a), and the limiting protrusion (1311) can be in limiting fit with the limiting groove (1322 a).

4. A clamp structure according to claim 3, characterized in that the width of the limit projection (1311) is D1, the width of the first connecting piece (131) is D2, 0.6-D1/D2-0.8.

5. The clamp structure according to claim 2, characterized in that the connecting plate (1321) is provided with a plurality of through holes (1321 a) at intervals.

6. The clamp structure according to claim 1, characterized in that the first clamping device (11) and the second clamping device (12) each comprise:

a fixing assembly (111);

-a clamping assembly (112), the clamping assembly (112) being hinged to the fixing assembly (111);

the pushing assembly (113) is respectively connected with the fixing assembly (111) and the clamping assembly (112);

the pushing assembly (113) can drive the clamping assembly (112) to rotate around a hinge point of the clamping assembly (112) and the fixing assembly (111).

7. The clamp structure of claim 6, wherein the clamp assembly (112) comprises:

a pressing arm (1121), wherein the pressing arm (1121) is respectively hinged with the pushing component (113) and the fixing component (111);

a first clamping member (1122), the first clamping member (1122) being located at an end of the pressure arm (1121) remote from the pushing assembly (113) and being connected to the pressure arm (1121);

and a second clamping member (1123), wherein one end of the second clamping member (1123) is connected with the pressing arm (1121), and the second clamping member (1123) is arranged at an interval from the first clamping member (1122).

8. The clamp structure of claim 7, wherein the clamp assembly (112) further comprises:

a positioning pin (1124), wherein the positioning pin (1124) is positioned on one side of the pressing arm (1121) and is connected with the pressing arm (1121);

the cross beam (50) is provided with a pin hole (53), and the positioning pin (1124) can be arranged in the pin hole (53) in a penetrating way along with the movement of the pressing arm (1121) towards the direction close to the cross beam (50).

9. The clamp structure of claim 7, wherein the push assembly (113) comprises:

a cylinder (1131), the cylinder (1131) being connected to the stationary assembly (111);

and one end of the piston rod (1132) is connected with the cylinder (1131), and the other end of the piston rod (1132) is hinged with the pressure arm (1121).

10. The clamp structure according to claim 6, characterized in that the first clamping device (11) and the second clamping device (12) each further comprise:

a first positioning block (114), wherein the first positioning block (114) is positioned between the clamping assembly (112) and the fixing assembly (111), and one side of the first positioning block (114) is connected with the clamping assembly (112);

the second positioning block (115), the second positioning block (115) is located between the clamping assembly (112) and the fixing assembly (111), and one side of the second positioning block (115) is connected with the fixing assembly (111);

wherein, the first locating block (114) can be in limit fit with the second locating block (115) so as to limit the movement of the clamping assembly (112) towards the direction approaching the fixing assembly (111).

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