A clamping mechanism

Abstract

This utility model belongs to the field of material conveying and automated production technology, and discloses a clamping mechanism. The clamping mechanism includes a first clamping member, a second clamping member, and a first driving member. The first clamping member includes a first clamping arm and a second clamping arm extending along a first direction and arranged opposite to each other; the second clamping member includes a third clamping arm and a fourth clamping arm extending along the first direction and arranged opposite to each other; the first driving member drives at least one of the first and second clamping members to move along a second direction; the third clamping arm is located between the first and second clamping arms, and the second clamping arm is located between the third and fourth clamping arms, thus forming a first clamping area between the first and third clamping arms, and a second clamping area between the second and fourth clamping arms. Each of the first and second clamping areas has at least one clamping position for clamping materials. This clamping mechanism can clamp multiple materials, improving compactness.

Description

Technical Field

[0001] This utility model relates to the field of material conveying and automated production technology, and in particular to a clamping mechanism. Background Technology

[0002] In the field of material handling and automated production, stable clamping and precise positioning of materials are key to achieving efficient automated production. Traditional clamping and conveying technologies are mainly designed for the handling of single materials, achieving reliable clamping and accurate displacement through relatively simple mechanical mechanisms. However, with the increasing demands for production efficiency, production systems often need to simultaneously clamp and convey multiple materials of the same specifications.

[0003] However, in multi-material conveying processes, when multiple materials are arranged side-by-side, ensuring precise alignment of each clamping point with its corresponding material presents significant positioning challenges. Maintaining strict synchronization between multiple clamping mechanisms also presents high coordination difficulties. This high-precision synchronization requirement places extremely high demands on the control system and mechanical structure. Furthermore, the debugging difficulty increases significantly. Multi-material clamping systems require individual calibration for each clamping point, while also considering the coordination relationships between them. The debugging process is complex and time-consuming, requiring repeated testing and adjustments by specialized technicians, increasing equipment deployment and maintenance costs.

[0004] Furthermore, to accommodate the need for multi-material clamping, the number of clamping units is often increased, resulting in a complex overall structure. These systems often require complex support structures, multiple power sources, and cumbersome transmission mechanisms, which not only increase equipment costs and floor space but also reduce system reliability and maintainability. To coordinate the actions of multiple clamping units, complex synchronization mechanisms, such as linkages, gear transmission groups, or complex control systems, are required, further increasing system complexity and the risk of failure. Utility Model Content

[0005] The purpose of this invention is to provide a clamping mechanism for stably clamping multiple materials, reducing the difficulty of positioning, fitting, and debugging, while also reducing the complexity of the structure and improving its compactness.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A clamping mechanism for clamping materials, comprising:

[0008] The first clamping member includes a first clamping arm and a second clamping arm that extend along a first direction and are disposed opposite to each other;

[0009] The second clamping member includes a third clamping arm and a fourth clamping arm that extend along the first direction and are disposed opposite to each other;

[0010] A first driving member is used to drive at least one of the first clamping member and the second clamping member to move along a second direction;

[0011] The third clamping arm is located between the first clamping arm and the second clamping arm, and the second clamping arm is located between the third clamping arm and the fourth clamping arm. A first clamping area is formed between the first clamping arm and the third clamping arm, and a second clamping area is formed between the second clamping arm and the fourth clamping arm. Each of the first clamping area and the second clamping area is provided with at least one clamping position for clamping the material.

[0012] As an alternative clamping mechanism, the first direction is perpendicular to the second direction.

[0013] As an alternative to the clamping mechanism, the first drive member includes two components, one for driving the first clamping member and the other for driving the second clamping member.

[0014] As an alternative to the clamping mechanism, the two first driving members are respectively disposed at both ends of the first clamping member along the first direction, or the two first driving members are respectively disposed at both ends of the second clamping member along the first direction.

[0015] As an alternative to the clamping mechanism, the first clamping arm and / or the fourth clamping arm are recessed inward at the clamping position to form a limiting groove for limiting the material.

[0016] As an alternative to the clamping mechanism, the limiting groove is provided with an elastic element for generating elastic deformation, and the material inside the clamping position abuts against the elastic element.

[0017] As an alternative to the clamping mechanism, the clamping mechanism further includes a slide, and both the first clamping member and the second clamping member are slidably connected to the slide; the slide is provided with a boss corresponding to each clamping position, and the material abuts against the boss.

[0018] As an alternative to the clamping mechanism, the clamping mechanism further includes a base and a second driving member. The first driving member is disposed on the base, and the second driving member is connected to the base. The second driving member is used to drive the base to move along the conveying direction of the material.

[0019] As an alternative to the clamping mechanism, the first clamping member further includes a first connecting plate, the first clamping arm is connected to the second clamping arm through the first connecting plate, and the first connecting plate is provided between two adjacent clamping positions in the first clamping area.

[0020] As an alternative clamping mechanism, the first clamping member includes a first connecting plate, the first clamping arm is connected to the second clamping arm through the first connecting plate, the second clamping member includes a second connecting plate, the third clamping arm is connected to the fourth clamping arm through the second connecting plate, one of the first connecting plate and the second connecting plate is provided with a guide groove extending along the second direction, and the other is slidably disposed in the guide groove.

[0021] Beneficial effects:

[0022] In this invention, the clamping mechanism firstly achieves convenient simultaneous clamping of multiple materials through the cross arrangement of the first and second clamping members, improving the efficiency of material clamping operations. Secondly, the cooperation of the first and second clamping members enables the clamping of multiple materials, reducing the difficulty of coordination and ensuring clamping stability. Simultaneously, it avoids the need for repeated positioning and frequent adjustments required in existing technologies to ensure the consistency and accuracy of clamping multiple materials, reducing positioning and adjustment difficulties. Furthermore, the cross arrangement of the first, second, third, and fourth clamping arms ensures sufficient space in both the first and second clamping areas for the materials to be clamped, while also reducing the complexity of the overall structure, thereby improving structural compactness and reducing space occupancy. Attached Figure Description

[0023] Figure 1 This is a first structural schematic diagram of the clamping mechanism and material provided in this embodiment of the utility model;

[0024] Figure 2 This is an exploded view of the clamping mechanism and the material provided in this embodiment of the utility model;

[0025] Figure 3 This is a second structural schematic diagram of the clamping mechanism and material provided in this embodiment of the utility model;

[0026] Figure 4 This is a top view of the clamping mechanism provided in this embodiment of the utility model;

[0027] Figure 5 This is a third structural schematic diagram of the clamping mechanism and material provided in this embodiment of the utility model.

[0028] In the picture:

[0029] X, first direction; Y, second direction;

[0030] 100. Material; 200. Clamping mechanism;

[0031] 1. First driving component;

[0032] 2. First clamping member; 21. First clamping arm; 211. Limiting groove; 212. Elastic member; 22. First connecting plate; 23. Second clamping arm;

[0033] 3. Second clamping component; 31. Third clamping arm; 32. Second connecting plate; 321. Guide groove; 33. Fourth clamping arm;

[0034] 4. First clamping area;

[0035] 5. Second clamping area;

[0036] 6. Clamping position;

[0037] 7. Slide; 71. Boss;

[0038] 8. Base;

[0039] 9. Second drive component. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0044] Please see the appendix Figure 1 -Appendix Figure 4 This embodiment relates to a clamping mechanism 200, which includes a first clamping member 2, a second clamping member 3, and a first driving member 1. The first clamping member 2 includes a first clamping arm 21 and a second clamping arm 23 extending along a first direction X and arranged opposite to each other; the second clamping member 3 includes a third clamping arm 31 and a fourth clamping arm 33 extending along the first direction X and arranged opposite to each other; the first driving member 1 is used to drive at least one of the first clamping member 2 and the second clamping member 3 to move along a second direction Y; wherein, the third clamping arm 31 is located between the first clamping arm 21 and the second clamping arm 23, and the second clamping arm 23 is located between the third clamping arm 31 and the fourth clamping arm 33, thereby forming a first clamping area 4 between the first clamping arm 21 and the third clamping arm 31, and forming a second clamping area 5 between the second clamping arm 23 and the fourth clamping arm 33, and each of the first clamping area 4 and the second clamping area 5 is provided with at least one clamping position 6 for clamping material 100.

[0045] Specifically, the first driving member 1 can be a cylinder, a hydraulic cylinder, or a motor. The first driving member 1 can output linear motion to drive at least one of the first clamping member 2 and the second clamping member 3 to move along the second direction Y. Alternatively, it can output rotational motion, which is converted into linear motion through an intermediate transmission structure. This intermediate transmission mechanism includes, but is not limited to, worm gears and rack and pinion gears. The structures of the first clamping member 2 and the second clamping member 3 can be the same or different. In this embodiment, both the first clamping member 2 and the second clamping member 3 are rectangular frame structures. The two opposite long sides of the first clamping member 2 form the first clamping arm 21 and the second clamping arm 23; the two opposite long sides of the second clamping member 3 form the third clamping arm 31 and the fourth clamping arm 33.

[0046] The third clamping arm 31 is located between the first clamping arm 21 and the second clamping arm 23, and the second clamping arm 23 is located between the third clamping arm 31 and the fourth clamping arm 33, thereby achieving a cross-positioning of the first clamping member 2 and the second clamping member 3. This forms a first clamping area 4 between the first clamping arm 21 and the third clamping arm 31, and a second clamping area 5 between the second clamping arm 23 and the fourth clamping arm 33. When the second clamping member 3 remains stationary, and the first driving member 1 drives the first clamping member 2 to move in the positive direction of the second direction Y, the first clamping arm 21 moves towards the third clamping arm 31, and the second clamping arm 23 moves towards the fourth clamping arm 33, thereby reducing the size of the first clamping area 4 and the second clamping area 5, and the clamping position 6 forms a state where the material 100 is clamped. When the second clamping member 3 remains stationary, and the first driving member 1 drives the first clamping member 2 to move in the negative direction of the second direction Y, the first clamping arm 21 moves away from the third clamping arm 31, and the second clamping arm 23 moves away from the fourth clamping arm 33, thereby expanding the first clamping area 4 and the second clamping area 5, and the clamping position 6 forms a state for releasing the material 100. It is also understandable that keeping the first clamping member 2 stationary while the first driving member 1 drives the second clamping member 3 to move reciprocally can also achieve the effect of controlling the expansion and contraction of the first clamping area 4 and the second clamping area 5, thereby realizing the clamping and release of the material 100.

[0047] Of course, the first driving member 1 can also simultaneously drive the first clamping member 2 and the second clamping member 3 to achieve clamping and releasing of the material 100. Specifically, when the first driving member 1 drives the first clamping member 2 to move in the positive direction of the second direction Y, and simultaneously drives the second clamping member 3 to move in the negative direction of the second direction Y, the first clamping arm 21 and the third clamping arm 31 move closer to each other, the second clamping arm 23 and the fourth clamping arm 33 move closer to each other, the first clamping area 4 and the second clamping area 5 shrink, and the clamping position 6 forms a state of clamping the material 100. When the first driving member 1 drives the first clamping member 2 to move in the negative direction of the second direction Y, and simultaneously drives the second clamping member 3 to move in the positive direction of the second direction Y, the first clamping area 4 and the second clamping area 5 expand, and the clamping position 6 forms a state of releasing the material 100.

[0048] Given that the first driving member 1 drives the first clamping member 2 and the second clamping member 3 at the same time, the first driving member 1 can be provided with two mounting seats that can be relatively close or relatively far apart, and the two mounting seats are respectively connected to the first clamping member 2 and the second clamping member 3 in a transmission connection.

[0049] In this embodiment, the clamping mechanism 200 specifically relates to the clamping of block-shaped materials 100. Firstly, the clamping mechanism 200, through the cross arrangement of the first clamping member 2 and the second clamping member 3, forms a first clamping area 4 and a second clamping area 5, which facilitates the simultaneous clamping of multiple materials 100, improving the efficiency of the clamping operation. Furthermore, the cooperation of the first clamping member 2 and the second clamping member 3 to clamp multiple materials 100 reduces the difficulty of coordination and ensures the stability of the clamping. Simultaneously, it avoids the need for repeated positioning and frequent adjustments required in existing technologies to ensure the consistency and accuracy of the clamping effect of multiple materials 100, reducing the difficulty of positioning and adjustment. Further, through the cross arrangement of the first clamping arm 21, the second clamping arm 23, the third clamping arm 31, and the fourth clamping arm 33, while ensuring sufficient space in the first clamping area 4 and the second clamping area 5 for the materials 100 to be clamped, the complexity of the overall structure can be reduced, thereby improving the compactness of the structure and reducing space occupation.

[0050] Optionally, the first direction X and the second direction Y are perpendicular to each other. By making the two directions perpendicular, it can be ensured that the clamping force of the first clamping member 2 and the second clamping member 3 on the material 100 is perpendicular to the contact surface of the material 100, avoiding the decomposition of the clamping force into a component force that causes the material 100 to have a tendency to move along the first direction X, thereby improving the stability of clamping the material 100.

[0051] Optionally, the first driving member 1 includes two, one for driving the first clamping member 2 and the other for driving the second clamping member 3.

[0052] Specifically, two first driving members 1 are respectively disposed at both ends of the first clamping member 2 along the first direction X, or two first driving members 1 are respectively disposed at both ends of the second clamping member 3 along the first direction X. In this embodiment, since the first clamping member 2 and the second clamping member 3 adopt the same structure, the two first driving members 1 can be located at both ends of the first clamping member 2 and the second clamping member 3 simultaneously.

[0053] In this embodiment, the driving methods of the two first driving members 1, the first clamping member 2, and the second clamping member 3 can be varied. For example, the two first driving members 1 can simultaneously drive one of the first clamping member 2 and the second clamping member 3, meaning that the two first driving members 1 can each drive one of them to move while the other remains stationary, thereby achieving the clamping and release of the material 100. The two first driving members 1 can also drive the first clamping member 2 and the second clamping member 3 respectively, thereby achieving relative movement between the first clamping member 2 and the second clamping member 3, to achieve the clamping and release of the material 100. Even more remarkably, each first driving member 1 can simultaneously drive the first clamping member 2 and the second clamping member 3 to achieve the clamping and release of the material 100, and the two first driving members 1 maintain synchronous driving. Those skilled in the art can choose the appropriate driving method for the above-mentioned driving methods; this embodiment does not limit the choice.

[0054] Optionally, the first clamping arm 21 and / or the fourth clamping arm 33 are recessed inward at the clamping position 6 to form a limiting groove 211 for limiting the material 100.

[0055] Specifically, since the first clamping arm 21 and the fourth clamping arm 33 are located on the outer side, they have sufficient space to extend outward, thus allowing their widths to be appropriately increased. The second clamping arm 23 and the third clamping arm 31 are located on the inner side, with the inner space used to form the first clamping area 4 and the second clamping area 5. Given the standard width of the material 100, the first clamping area 4 and the second clamping area 5 should not be too large. Therefore, to avoid excessive encroachment on the first clamping area 4 and the second clamping area 5 by the second clamping arm 23 extending inward, their widths should be appropriately reduced. Since the widths of the first clamping arm 21 and the fourth clamping arm 33 can be appropriately increased, a limiting groove 211 for limiting the material 100 is provided on the first clamping arm 21 and the fourth clamping arm 33. The depth direction of the limiting groove 211 is the same as the width direction of the first clamping arm 21 and the fourth clamping arm 33. The limiting groove 211 has a U-shaped structure, and the inside of the groove forms an arc surface structure that contacts the contact surface of the material 100, thereby ensuring that the contact surface of the material 100 is completely fitted with the inner wall of the limiting groove 211, ensuring the stability of the clamping. In this embodiment, both the first clamping member 2 and the second clamping member 3 adopt a rectangular frame structure, but both are asymmetrical structures, that is, the width of the first clamping arm 21 is greater than the width of the second clamping arm 23, and the width of the fourth clamping arm 33 is greater than the width of the third clamping arm 31.

[0056] Of course, if space permits, the limiting groove 211 can also be formed on the second clamping arm 23 and the third clamping arm 31, or even the first clamping arm 21, the second clamping arm 23, the third clamping arm 31 and the fourth clamping arm 33 can all be provided with limiting grooves 211, and the corresponding limiting grooves 211 of the first clamping arm 21 and the third clamping arm 31 can be kept opposite each other, and the corresponding limiting grooves 211 of the second clamping arm 23 and the fourth clamping arm 33 can be kept opposite each other.

[0057] Furthermore, the limiting groove 211 is provided with an elastic element 212 for generating elastic deformation, and the material 100 inside the clamping position 6 abuts against the elastic element 212.

[0058] Specifically, the elastic element 212 is a silicone pad or other elastic material. The elastic element 212 is engaged or adhered to the limiting groove 211. When the clamping position 6 clamps the material 100, the elastic element 212 maintains a stable clamping force while preventing damage to the material 100 due to excessive clamping force. Simultaneously, the soft rubber material of the elastic element 212 provides greater surface friction; in scenarios requiring to prevent drop, for the same frictional force, a smaller clamping force is needed on the material 100. Furthermore, for the same clamping force requirement on the material 100, the resulting frictional force against gravity is also greater.

[0059] Optionally, the clamping mechanism 200 further includes a slide 7, and the first clamping member 2 and the second clamping member 3 are slidably connected to the slide 7; the slide 7 is provided with a boss 71 corresponding to each clamping position 6, and the material 100 abuts against the boss 71.

[0060] Specifically, the slide 7 has a flat plate structure and serves as a sliding support for the first clamping member 2 and the second clamping member 3. Simultaneously, a boss 71 protrudes from the surface of the slide 7 facing the first clamping member 2 and the second clamping member 3. The material 100 is first placed on the boss 71, and then clamped by the movement of the first clamping member 2 and / or the second clamping member 3. Each boss 71 can be used to limit the height of the material 100, thereby ensuring that multiple materials 100 located on this clamping mechanism 200 maintain the same height, thus achieving clamping of the materials 100 at essentially the same height and ensuring the consistency of the clamping effect on the materials 100.

[0061] Furthermore, the clamping mechanism 200 also includes a base 8 and a second driving member 9. The first driving member 1 is disposed on the base 8, and the second driving member 9 is connected to the base 8. The second driving member 9 is used to drive the base 8 to move along the conveying direction of the material 100.

[0062] In this embodiment, the second driving member 9 can be a linear motor, and its driving end is directly connected to the base 8. The first driving member 1 can be fixed to the end of the base 8 using threaded fasteners. This allows the second driving member 9 to drive the base 8 and the first driving member 1, along with the material 100, for conveying. Therefore, this clamping mechanism 200 can not only stably clamp the material 100 but also convey it, further expanding the functionality and adaptability of the clamping mechanism 200.

[0063] Please see the appendix Figure 5 Optionally, the first clamping member 2 further includes a first connecting plate 22, the first clamping arm 21 is connected to the second clamping arm 23 through the first connecting plate 22, and the first connecting plate 22 is provided between two adjacent clamping positions 6 in the first clamping area 4.

[0064] In this embodiment, both the clamping positions 6 and the material 100 are spaced apart along the first direction X. The first connecting plates 22, arranged at multiple intervals, can reinforce the first clamping member 2, ensuring that the first clamping arm 21 and the second clamping arm 23 are not easily deformed under frequent clamping operations, thus ensuring the accuracy and stability of positioning and clamping the material 100. At the same time, the first connecting plates 22, positioned between two adjacent clamping positions 6, also avoid interference with the material 100.

[0065] Furthermore, the second clamping member 3 includes a second connecting plate 32, and the third clamping arm 31 is connected to the fourth clamping arm 33 through the second connecting plate 32. One of the first connecting plate 22 and the second connecting plate 32 is provided with a guide groove 321 extending along the second direction Y, and the other is slidably disposed in the guide groove 321.

[0066] Adaptively, the second connecting plate 32, which is set at multiple intervals, can reinforce the second clamping member 3, ensuring that the third clamping arm 31 and the fourth clamping arm 33 are not easily deformed under frequent clamping operations, thus ensuring the accuracy and stability of positioning and clamping the material 100.

[0067] Furthermore, the second connecting plate 32 forms a U-shaped guide groove 321 along the second direction Y, and the first connecting plate 22 can be directly slidably disposed within the guide groove 321, thereby providing a guiding function during the relative sliding of the first connecting plate 22 and the second connecting plate 32. Of course, in other embodiments, the guide groove 321 can also be disposed on the first connecting plate 22, and the second connecting plate 32 can be slidably disposed within the guide groove 321.

[0068] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clamping mechanism for clamping materials, characterized in that, include: The first clamping member includes a first clamping arm and a second clamping arm that extend along a first direction and are disposed opposite to each other; The second clamping member includes a third clamping arm and a fourth clamping arm that extend along the first direction and are disposed opposite to each other; A first driving member is used to drive at least one of the first clamping member and the second clamping member to move along a second direction to clamp the material; The third clamping arm is located between the first clamping arm and the second clamping arm, and the second clamping arm is located between the third clamping arm and the fourth clamping arm. A first clamping area is formed between the first clamping arm and the third clamping arm, and a second clamping area is formed between the second clamping arm and the fourth clamping arm. Each of the first clamping area and the second clamping area is provided with at least one clamping position for clamping the material.

2. The clamping mechanism according to claim 1, characterized in that, The first direction and the second direction are perpendicular to each other.

3. The clamping mechanism according to claim 1, characterized in that, The first driving member includes two components, one for driving the first clamping member and the other for driving the second clamping member.

4. The clamping mechanism according to claim 3, characterized in that, The two first driving members are respectively disposed at both ends of the first clamping member along the first direction, or the two first driving members are respectively disposed at both ends of the second clamping member along the first direction.

5. The clamping mechanism according to claim 1, characterized in that, The first clamping arm and / or the fourth clamping arm are recessed inward at the clamping position to form a limiting groove for limiting the material.

6. The clamping mechanism according to claim 5, characterized in that, The limiting groove is provided with an elastic element for generating elastic deformation, and the material inside the clamping position abuts against the elastic element.

7. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism further includes a slide block, and the first clamping member and the second clamping member are slidably connected to the slide block; the slide block is provided with a boss corresponding to each clamping position, and the material abuts against the boss.

8. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism further includes a base and a second driving member. The first driving member is disposed on the base, and the second driving member is connected to the base. The second driving member is used to drive the base to move along the conveying direction of the material.

9. The clamping mechanism according to claim 1, characterized in that, The first clamping member further includes a first connecting plate, the first clamping arm is connected to the second clamping arm through the first connecting plate, and the first connecting plate is provided between two adjacent clamping positions in the first clamping area.

10. The clamping mechanism according to claim 1, characterized in that, The first clamping member includes a first connecting plate, the first clamping arm is connected to the second clamping arm through the first connecting plate, the second clamping member includes a second connecting plate, the third clamping arm is connected to the fourth clamping arm through the second connecting plate, one of the first connecting plate and the second connecting plate is provided with a guide groove extending along the second direction, and the other is slidably disposed in the guide groove.

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