A cloth clasp with high strength wear-resistant blade

Abstract

The utility model relates to cloth clasp technical field, concretely relates to a cloth clasp with high strength wear -resisting blade, including fixed block, the one side fixed connection of fixed block has the fixed plate, the one side of fixed plate is provided with wear -resisting component for improving cloth clasp wear -resisting strength, the utility model discloses through setting wear -resisting component and replacement component, mutually cooperate and build a complete'initiative protection + quick recovery', wear -resisting component as'initiative protection'layer, greatly delayed the occurrence of wear and tear in routine operation, reduced the replacement frequency, and when wear and tear is inevitable, replacement component then as'quick recovery'means, ensure maintenance work instantaneous completion, both complement each other, common effect, not only greatly reduced maintenance cost and time cost, also effectively guaranteed the continuity of production and the stability of product quality.

Description

Technical Field

[0001] This utility model relates to the field of cloth clamp technology, and in particular to a cloth clamp with a high-strength wear-resistant blade. Background Technology

[0002] Fabric clamps are key fixtures on continuous fabric processing production lines (such as mercerizing and stentering) in industries such as dyeing, finishing, and textiles. Their core function is to clamp both sides of the fabric edge during the production process, so that the fabric can move smoothly under radial tension, and to prevent fabric shrinkage and ensure the quality of the stentering through the widening device.

[0003] In existing technologies, such as the "A Cloth Clamp with High-Strength Wear-Resistant Blades" with announcement number CN223422944U, a fixing mechanism is included; it also includes a support mechanism, a clamping mechanism, a traction mechanism, and an adjustment mechanism. The support mechanism is installed on the fixing mechanism and supports the fabric, while the clamping mechanism is installed on the support mechanism and clamps the fabric. Although this technology can pre-tighten the clamps, reduce the range of motion of the clamps, and improve the clamping effect of the device, this technology is consistent with the traditional method in that the clamping components of traditional cloth clamps (such as cloth clamp blades or rollers) usually rub directly and continuously against the high-speed running fabric edge, resulting in extremely rapid wear. This not only requires frequent shutdowns for replacement, increasing maintenance costs, but can also cause a decrease in clamping force, fabric slippage, or deviation due to uneven wear of components, seriously affecting product quality. Secondly, when the clamping components are worn, the replacement operation is often cumbersome and time-consuming, requiring professional tools and manual adjustment, and cannot achieve rapid online switching, which directly causes a loss of production efficiency. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a cloth clamp with a high-strength wear-resistant blade, so as to solve the problems of high maintenance costs, low production efficiency and easy impact on product quality caused by the easy wear and cumbersome replacement of the clamping parts of the existing cloth clamp.

[0005] Based on the above objectives, this utility model provides a cloth clamp with high-strength wear-resistant blades, including a fixing block. A fixing plate is fixedly connected to one side of the fixing block. A wear-resistant component for improving the wear resistance of the cloth clamp is provided on one side of the fixing plate. The wear-resistant component includes a connecting shaft installed on one side of the fixing plate. Four U-shaped plates are fixedly connected at equal intervals in a ring around the outside of the connecting shaft. Two cloth clamp rollers are rotatably connected inside the U-shaped plates away from the connecting shaft. A counterweight ring is rotatably installed between the two cloth clamp rollers. Multiple connecting cylinders are fixedly connected at equal intervals in a ring around the inside of the counterweight ring. Movable columns are slidably installed inside the multiple connecting cylinders. A ball bearing is rotatably installed inside one end of the movable column. A replacement component is provided on one side of the connecting shaft. The replacement component is used to replace the cloth clamp rollers when the cloth clamp releases and clamps the cloth. The wear-resistant component and the replacement component work together to improve the wear resistance of the cloth clamp and extend its service life.

[0006] Preferably, a Z-shaped plate is fixedly connected to the end of the fixed plate away from the fixed block, and the position of the end of the Z-shaped plate away from the fixed plate corresponds to the position of the cloth roller.

[0007] Preferably, a first spring is installed inside the connecting cylinder. The first spring is sleeved on the outside of the movable column. One end of the first spring is fixedly connected to the outside of the movable column near the ball, and the other end of the first spring is fixedly connected to the inside of the connecting cylinder away from the ball.

[0008] Preferably, one side of the U-shaped plate is fixedly connected to an extrusion block through the inside of the cloth clamping roller via a shaft. The extrusion block has multiple arc-shaped grooves equidistantly spaced on its outer side. When the arc-shaped grooves rotate, the outer side of the arc-shaped grooves contacts the end of the movable column away from the ball bearing.

[0009] Preferably, the replacement component includes a connecting block rotatably connected to one side of the connecting shaft, a sliding hole is provided inside the fixing plate, the outside of the connecting block is slidably installed inside the sliding hole, a first alignment post is fixedly connected to the side of the connecting block away from the connecting shaft, and a second alignment post is slidably installed on one side of the fixing plate, the position of the second alignment post corresponding to the position of the first alignment post.

[0010] Preferably, a plurality of second V-shaped grooves are provided on one side of the first alignment post, and a plurality of first V-shaped grooves are provided on one side of the second alignment post. The positions of the first V-shaped grooves and the second V-shaped grooves are staggered. A pressing post is fixedly connected to one side of the connecting shaft. The end of the pressing post away from the connecting shaft passes through the interior of the first alignment post, the second alignment post, and the positioning plate. A sliding post is fixedly connected to one side of the pressing post. The end of the sliding post away from the pressing post is slidably connected between the first V-shaped groove and the second V-shaped groove. When the sliding post moves from the interior of one first V-shaped groove to the interior of the next first V-shaped groove, the pressing post rotates 90 degrees.

[0011] Preferably, a second spring is sleeved on the outside of the pressing column, one end of the second spring is fixedly connected to the inside of the connecting block near the connecting shaft, and the other end of the second spring is fixedly connected to the outside of the pressing column away from the connecting shaft.

[0012] Preferably, a sloped plate is fixedly connected to one side of the fixed plate. When the pressing column moves along the slope surface of the sloped plate to the straight surface of the sloped plate, the second spring is in a compressed state and the sliding column moves along the trajectory of the first V-groove to the inside of the second V-groove.

[0013] Preferably, a connecting plate is fixedly connected to one side of the fixing block, and a latch is rotatably connected to one end of the connecting plate via a shaft. A V-shaped plate is rotatably connected to the side of the latch near the connecting plate via a shaft. A connecting rod is rotatably connected to the end of the V-shaped plate away from the latch via a shaft. The end of the connecting rod away from the V-shaped plate passes through the top of the fixing block and is fixedly connected to one side of the connecting block. A limiting groove is formed on one side of the latch. The position of the limiting groove corresponds to the position of the V-shaped plate, and the specifications and dimensions of the limiting groove are adapted to the specifications and dimensions of the V-shaped plate.

[0014] The beneficial effects of this utility model are:

[0015] 1. By combining wear-resistant components and replacement components, a complete "active protection + rapid recovery" system is constructed. The wear-resistant components, as the "active protection" layer, greatly delay the occurrence of wear and reduce the frequency of replacement during daily operation. When wear is unavoidable, the replacement components serve as a "rapid recovery" means to ensure that maintenance work is completed instantly. The two complement each other and work together to not only significantly reduce maintenance and time costs, but also effectively ensure the continuity of production and the stability of product quality.

[0016] 2. Through the wear-resistant components and the centrifugal-driven ball mechanism, some of the sliding friction between the fabric clamping roller and the fabric is converted into rolling friction during high-speed operation. This not only significantly reduces the direct wear rate of the fabric clamping roller and extends its service life, but also reduces the fluctuation of clamping force caused by uneven local wear through uniform rolling contact. This fundamentally prevents quality problems such as fabric slippage and deviation, and ensures the stability of product quality.

[0017] 3. By setting up replacement components, the opening and closing action of the cloth clamp itself is used as power. Through mechanical structures (such as V-grooves and slope plates), the standby position can be automatically switched to the working position in one operation cycle. This design realizes the rapid replacement of worn cloth clamp rollers without any additional tools or cumbersome debugging, which greatly shortens maintenance time, reduces production efficiency loss caused by downtime, and significantly improves the overall utilization rate of equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0020] Figure 2 This utility model Figure 1 Another perspective structural diagram;

[0021] Figure 3 This is a side sectional view of the U-shaped plate and connecting block of this utility model.

[0022] Figure 4 This is an enlarged schematic diagram of the alignment post structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the counterweight ring of this utility model;

[0024] Figure 6 This is an enlarged schematic diagram of the latch structure of this utility model.

[0025] The diagram is marked as follows:

[0026] 1. Fixing block; 2. Connecting plate; 3. Lock; 4. V-shaped plate; 5. Limiting groove; 6. Fixing plate; 7. Connecting rod; 8. Connecting block; 9. Connecting shaft; 10. U-shaped plate; 11. Z-shaped plate; 12. Cloth clamping roller; 13. Counterweight ring; 14. Connecting cylinder; 15. Extrusion block; 16. Arc groove; 17. Movable column; 18. Ball bearing; 19. First spring; 20. Pressing column; 21. First alignment column; 22. Second alignment column; 23. Sliding column; 24. First V-shaped groove; 25. Second V-shaped groove; 26. Second spring; 27. Sloping plate; 28. Sliding hole; 29. ​​Positioning plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0028] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] Such as this utility model Figures 1 to 6 The diagram shows a cloth clamp with high-strength wear-resistant blades, including a fixing block 1. A fixing plate 6 is fixedly connected to one side of the fixing block 1. A wear-resistant component for improving the wear resistance of the cloth clamp is provided on one side of the fixing plate 6. The wear-resistant component includes a connecting shaft 9 installed on one side of the fixing plate 6. Four U-shaped plates 10 are fixedly connected at equal intervals in a ring around the outside of the connecting shaft 9. Two cloth clamp rollers 12 are rotatably connected inside the U-shaped plates 10 away from the connecting shaft 9. A counterweight ring 13 is rotatably installed between the two cloth clamp rollers 12. Multiple connecting cylinders 14 are fixedly connected at equal intervals in a ring around the inside of the counterweight ring 13. Movable columns 17 are slidably installed inside the multiple connecting cylinders 14. A ball bearing 18 is rotatably installed inside one end of the movable column 17. A replacement component is provided on one side of the connecting shaft 9. The replacement component is used to replace the cloth clamp rollers 12 when the cloth clamp releases and clamps the cloth. The wear-resistant component and the replacement component work together to improve the wear resistance of the cloth clamp and extend its service life.

[0030] By combining wear-resistant and replaceable components, a complete "active protection + rapid recovery" system is constructed. The wear-resistant components, as the "active protection" layer, greatly delay the occurrence of wear and reduce the frequency of replacement during daily operation. When wear is unavoidable, the replaceable components serve as a "rapid recovery" means to ensure that maintenance work is completed instantly. The two complement each other and work together to not only significantly reduce maintenance and time costs, but also effectively ensure the continuity of production and the stability of product quality.

[0031] like Figure 1 and Figure 2 As shown, a Z-shaped plate 11 is fixedly connected to the end of the fixed plate 6 away from the fixed block 1, and the position of the end of the Z-shaped plate 11 away from the fixed plate 6 corresponds to the position of the cloth clip roller 12;

[0032] With the Z-shaped plate 11 and the cloth clamping roller 12 in use, the cloth is placed on one side of the Z-shaped plate 11, and the cloth clamping roller 12 is moved closer to the Z-shaped plate 11 to make the cloth clamping roller 12 cooperate with the Z-shaped plate 11 to clamp the cloth, thereby facilitating the transfer of the cloth.

[0033] like Figures 1 to 5 As shown, a first spring 19 is installed inside the connecting cylinder 14. The first spring 19 is sleeved on the outside of the movable column 17. One end of the first spring 19 is fixedly connected to the outside of the movable column 17 near the ball 18, and the other end of the first spring 19 is fixedly connected to the inside of the connecting cylinder 14 away from the ball 18. A pressing block 15 is fixedly connected to one side of the U-shaped plate 10 through the inside of the cloth clamping roller 12 via a shaft. Multiple arc-shaped grooves 16 are equidistantly opened on the outside of the pressing block 15. When the arc-shaped grooves 16 rotate, the outside of the arc-shaped grooves 16 contacts the end of the movable column 17 away from the ball 18.

[0034] With the ball bearings 18 and the first spring 19 in place, the fabric clamping roller 12 directly contacts and clamps the fabric during low speed or startup, ensuring the stability of initial traction. As the transmission speed increases, the extrusion block 15 fixed on the shaft of the fabric clamping roller 12 rotates faster. The extrusion block 15 extrudes the movable column 17 at high frequency and periodically, overcoming the resistance of the first spring 19 and pushing the end ball bearings 18 to contact the fabric more frequently and forcefully. This converts some sliding friction into rolling friction, significantly improving the lubrication of the transmission. At the same time, it shares and reduces the direct wear of the fabric clamping roller 12 body. Thus, while ensuring efficient transmission, it greatly improves the wear resistance and service life of the core working component, the fabric clamping roller 12. Meanwhile, by setting a counterweight ring 13 with a certain weight, the frequency of rotation of the extrusion block 15 is different from the frequency of rotation of the counterweight ring 13, which facilitates the contact between the ball bearings 18 and the fabric.

[0035] like Figures 1 to 4 As shown, the replacement component includes a connecting block 8 rotatably connected to one side of the connecting shaft 9, a sliding hole 28 is provided inside the fixing plate 6, the outside of the connecting block 8 is slidably installed inside the sliding hole 28, a first alignment post 21 is fixedly connected to the side of the connecting block 8 away from the connecting shaft 9, and a second alignment post 22 is slidably installed on one side of the fixing plate 6, the position of the second alignment post 22 corresponds to the position of the first alignment post 21;

[0036] By using the opening and closing action of the cloth clamp itself as power through the set replacement component, the standby position can be automatically switched to the working position in one operation cycle through the mechanical structure. This design realizes the rapid replacement of the worn cloth clamp roller 12 without any additional tools or cumbersome debugging, which greatly shortens the maintenance time, reduces the production efficiency loss caused by downtime, and significantly improves the overall utilization rate of the equipment.

[0037] like Figures 1 to 6 As shown, a plurality of second V-shaped grooves 25 are provided on one side of the first alignment post 21, and a plurality of first V-shaped grooves 24 are provided on one side of the second alignment post 22. The positions of the first V-shaped grooves 24 and the second V-shaped grooves 25 are staggered. A pressing post 20 is fixedly connected to one side of the connecting shaft 9. The end of the pressing post 20 away from the connecting shaft 9 passes through the interior of the first alignment post 21, the second alignment post 22 and the positioning plate 29. A sliding post 23 is fixedly connected to one side of the pressing post 20. The end of the sliding post 23 away from the pressing post 20 is slidably connected between the first V-shaped groove 24 and the second V-shaped groove 25. When the sliding post 23 moves from the interior of one first V-shaped groove 24 to the interior of the next first V-shaped groove 24, the pressing post 20 rotates 90 degrees. A second spring 26 is sleeved on the outside of the pressing post 20. One end of the second spring 26 is fixedly connected to the interior of the connecting block 8 near the connecting shaft 9, and the other end of the second spring 26 is fixedly connected to the exterior of the pressing post 20 away from the connecting shaft 9.

[0038] With the help of the V-groove, when the fabric is released and the latch 3 is pulled, the fabric clamp roller 12 assembly moves along the inclined surface of the slope plate 27 during the reset process. This drives the pressing column 20 to compress the second spring 26 and forces the sliding column 23 to move along the trajectory of the first V-groove 24 into the second V-groove 25. This drives the connecting shaft 9 to rotate 45 degrees. Subsequently, when the fabric is clamped again and the latch 3 is closed, the fabric clamp disengages from the slope plate 27. The pressing column 20 rebounds under the action of the spring, and the sliding column 23 slides along the trajectory of the second V-groove 25 into the next first V-groove 24. This drives the connecting shaft 9 to rotate another 45 degrees. Through a complete "open-close" cycle, a 90-degree rotation can be automatically completed, accurately switching a new set of spare fabric clamp rollers 12 to the working position. This design requires no additional tools or complicated operations, is highly efficient and convenient, and significantly extends the overall service cycle of the fabric clamp.

[0039] like Figure 1 and Figure 2 As shown, a slope plate 27 is fixedly connected to one side of the fixed plate 6. When the pressing column 20 moves along the slope surface of the slope plate 27 to the straight surface of the slope plate 27, the second spring 26 is in a compressed state and the sliding column 23 moves along the trajectory of the first V-groove 24 to the inside of the second V-groove 25.

[0040] The sloped plate 27 facilitates the use of the pressing column 20. The special shape of the sloped plate 27 enables the pressing column 20 to be squeezed or released, thus avoiding the trouble of manual pressing.

[0041] like Figure 1 , Figure 2 and Figure 6As shown, a connecting plate 2 is fixedly connected to one side of the fixing block 1. A lock 3 is rotatably connected to one end of the connecting plate 2 via a shaft. A V-shaped plate 4 is rotatably connected to the side of the lock 3 near the end of the connecting plate 2 via a shaft. A connecting rod 7 is rotatably connected to the end of the V-shaped plate 4 away from the lock 3 via a shaft. The end of the connecting rod 7 away from the V-shaped plate 4 passes through the top of the fixing block 1 and is fixedly connected to one side of the connecting block 8. A limiting groove 5 is opened on one side of the lock 3. The position of the limiting groove 5 corresponds to the position of the V-shaped plate 4, and the specifications and dimensions of the limiting groove 5 are compatible with the specifications and dimensions of the V-shaped plate 4.

[0042] With the locking buckle 3 in place, when clamping the fabric, pressing the locking buckle 3 causes the limiting groove 5 on one side of the locking buckle 3 to press against the outside of the V-shaped plate 4 and clamp it, thereby limiting the position of the fabric clamping roller 12, which facilitates the transfer of the fabric. At the same time, when releasing the fabric, lifting one end of the locking buckle 3 causes the limiting groove 5 to move away from the outside of the V-shaped plate 4, and at the same time causes one end of the locking buckle 3 to move through the V-shaped plate 4 to pull the connecting rod 7, which not only achieves quick release of the fabric, but also facilitates the use of the replacement components, thereby improving convenience.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0044] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cloth clamp with a high-strength, wear-resistant blade, characterized in that, The device includes a fixed block (1), a fixed plate (6) is fixedly connected to one side of the fixed block (1), and a wear-resistant component for improving the wear resistance of the cloth clip is provided on one side of the fixed plate (6). The wear-resistant component includes a connecting shaft (9) installed on one side of the fixed plate (6). Four U-shaped plates (10) are fixedly connected to the outside of the connecting shaft (9) at equal intervals. Two cloth clip rollers (12) are rotatably connected inside the U-shaped plate (10) away from the connecting shaft (9). A counterweight ring (13) is rotatably installed between the two cloth clip rollers (12). Multiple connecting cylinders (14) are fixedly connected to the inside of the counterweight ring (13) at equal intervals. Movable columns (17) are slidably installed inside the multiple connecting cylinders (14). A ball bearing (18) is rotatably installed inside one end of the movable column (17). A replacement assembly is provided on one side of the connecting shaft (9), which is used to replace the cloth clamp roller (12) when the cloth clamp releases and clamps the cloth; The wear-resistant components and replacement components work together to improve the wear resistance of the cloth clips while extending their service life.

2. A cloth clamp with a high-strength, wear-resistant blade according to claim 1, characterized in that, The fixed plate (6) is fixedly connected to a Z-shaped plate (11) at one end away from the fixed block (1), and the position of the Z-shaped plate (11) away from the fixed plate (6) corresponds to the position of the cloth roller (12).

3. A cloth clamp with a high-strength, wear-resistant blade according to claim 1, characterized in that, The connecting cylinder (14) is equipped with a first spring (19), which is sleeved on the outside of the movable column (17). One end of the first spring (19) is fixedly connected to the outside of the movable column (17) near the ball (18), and the other end of the first spring (19) is fixedly connected to the inside of the connecting cylinder (14) away from the ball (18).

4. A cloth clamp with a high-strength, wear-resistant blade according to claim 3, characterized in that, One side of the U-shaped plate (10) is fixedly connected to the inside of the cloth clamping roller (12) through a shaft. The outer side of the clamping block (15) is provided with a plurality of arc-shaped grooves (16) at equal intervals. When the arc-shaped grooves (16) rotate, the outer side of the arc-shaped grooves (16) contacts the end of the movable column (17) away from the ball (18).

5. A cloth clamp with a high-strength, wear-resistant blade according to claim 1, characterized in that, The replacement component includes a connecting block (8) rotatably connected to one side of the connecting shaft (9). The fixing plate (6) has a sliding hole (28) inside. The outside of the connecting block (8) is slidably installed inside the sliding hole (28). A first alignment post (21) is fixedly connected to the side of the connecting block (8) away from the connecting shaft (9). A second alignment post (22) is slidably installed on one side of the fixing plate (6). The position of the second alignment post (22) corresponds to the position of the first alignment post (21).

6. A cloth clamp with a high-strength, wear-resistant blade according to claim 5, characterized in that, The first alignment post (21) has multiple second V-shaped grooves (25) on one side, and the second alignment post (22) has multiple first V-shaped grooves (24) on one side. The positions of the first V-shaped grooves (24) and the second V-shaped grooves (25) are staggered. A pressing post (20) is fixedly connected to one side of the connecting shaft (9). The end of the pressing post (20) away from the connecting shaft (9) passes through the interior of the first alignment post (21), the second alignment post (22) and the positioning plate (29). A sliding post (23) is fixedly connected to one side of the pressing post (20). The end of the sliding post (23) away from the pressing post (20) is slidably connected between the first V-shaped groove (24) and the second V-shaped groove (25). When the sliding post (23) moves from the interior of one first V-shaped groove (24) to the interior of the next first V-shaped groove (24), the pressing post (20) rotates 90 degrees.

7. A cloth clamp with a high-strength, wear-resistant blade according to claim 6, characterized in that, The pressing post (20) is fitted with a second spring (26). One end of the second spring (26) is fixedly connected to the inside of the connecting block (8) near the connecting shaft (9), and the other end of the second spring (26) is fixedly connected to the outside of the pressing post (20) away from the connecting shaft (9).

8. A cloth clamp with a high-strength, wear-resistant blade according to claim 7, characterized in that, A slope plate (27) is fixedly connected to one side of the fixed plate (6). When the pressing column (20) moves along the slope surface of the slope plate (27) to the straight surface of the slope plate (27), the second spring (26) is in a compressed state and the sliding column (23) moves along the trajectory of the first V-groove (24) to the inside of the second V-groove (25).

9. A cloth clamp with a high-strength, wear-resistant blade according to claim 7, characterized in that, A connecting plate (2) is fixedly connected to one side of the fixed block (1). A lock (3) is rotatably connected to one end of the connecting plate (2) via a shaft. A V-shaped plate (4) is rotatably connected to one side of the lock (3) near the end of the connecting plate (2) via a shaft. A connecting rod (7) is rotatably connected to one end of the V-shaped plate (4) away from the lock (3) via a shaft. The end of the connecting rod (7) away from the V-shaped plate (4) passes through the top of the fixed block (1) and is fixedly connected to one side of the connecting block (8). A limiting groove (5) is opened on one side of the lock (3). The position of the limiting groove (5) corresponds to the position of the V-shaped plate (4), and the size of the limiting groove (5) is compatible with the size of the V-shaped plate (4).

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