Clamping mechanism for irregular busbar

Abstract

The utility model discloses an irregular busbar clamping mechanism, which comprises a clamping assembly and a driving mechanism, the clamping assembly at least has a first state and a second state, in the first state, the clamping assembly is in a natural state, and a clamping part of the clamping assembly can extend into a through hole; in the second state, the clamping assembly is in an external expansion state, and the clamping part of the clamping assembly expands outwards and abuts against the inner wall of the through hole, so that the irregular busbar is clamped; the driving mechanism is connected with the clamping assembly so as to drive the clamping assembly to be switched between the first state and the second state, and releasing and clamping of the busbar are achieved. The busbar clamping device can be suitable for clamping busbars with irregular shapes, and is good in clamping performance.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a clamping mechanism for irregular busbars. Background Technology

[0002] In the field of power electronics and electrical equipment manufacturing, busbars, as key conductive components, are widely used in power distribution systems. During the machining and assembly of busbar products, they often need to be clamped and fixed to ensure machining accuracy and operational stability. However, some busbar products have irregular geometric shapes due to design requirements and have through holes in the center, which poses a significant challenge to the clamping of traditional fixtures.

[0003] Currently, common clamps (such as mechanical vises and pneumatic clamps) are mainly designed for workpieces with regular shapes. Their clamping surfaces are usually flat or have simple contours, making them difficult to adapt to the complex shapes of busbar products. Especially when clamping irregular products with through holes in the center, traditional clamps are prone to the following problems due to insufficient contact area or uneven force:

[0004] 1. Poor clamping stability: Due to the irregular shape of the busbar, the contact point between the fixture and the workpiece may deviate from the center of gravity, and slippage or displacement may easily occur during the clamping process, affecting the machining accuracy;

[0005] 2. Localized stress concentration: The rigid clamping of traditional fixtures may cause squeezing deformation of weak parts of the busbar, or even damage the product;

[0006] 3. Insufficient adaptability: Busbar products of different specifications require frequent changes of fixtures, which reduces production efficiency. Utility Model Content

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention provides a clamping mechanism for irregular busbars, which is applicable to clamping busbars with irregular shapes and has good clamping performance.

[0008] According to an embodiment of the present invention, an irregular busbar clamping mechanism is provided on the irregular busbar, and the clamping mechanism includes:

[0009] A clamping assembly having at least a first state and a second state. In the first state, the clamping assembly is in a natural state, and the clamping portion of the clamping assembly can extend into a through hole. In the second state, the clamping assembly is in an outwardly expanded state, and the clamping portion of the clamping assembly expands outward and abuts against the inner wall of the through hole to clamp irregular busbars.

[0010] A drive mechanism connected to the clamping assembly to drive the clamping assembly to switch between a first state and a second state.

[0011] According to the clamping mechanism of the irregular busbar according to this utility model, the clamping and release of the busbar can be realized through the cooperation of the clamping component and the driving mechanism, which meets the clamping requirements of the irregular busbar and has good clamping performance.

[0012] In some embodiments of this utility model, the clamping assembly includes:

[0013] The mounting assembly has a bottom-open first receiving cavity;

[0014] A collet, wherein a second receiving cavity is defined within the collet, the collet is disposed within the first receiving cavity, and the top of the collet is connected to the mounting assembly;

[0015] An expansion core, which is movable up and down within the second receiving cavity;

[0016] The output end of the drive mechanism extends into the second receiving cavity and connects to the top of the expansion core. In the first state, the expansion core does not exert an outward pushing force on the collet, and the collet is in a natural state. In the second state, the expansion core is located in the lower part of the second receiving cavity and exerts an outward pushing force on the collet, and the bottom end of the collet expands outward and abuts against the inner wall of the through hole.

[0017] In some embodiments of this utility model, the mounting component includes:

[0018] A positioning plate is disposed on the top of the collet and connected to the top end of the collet;

[0019] An upper limit cylinder defines an upper mounting cavity with an open top, and a limiting hole is provided at the bottom of the upper limit cylinder;

[0020] A lower limiting cylinder defines a lower mounting cavity that is open at both the top and bottom, and the lower limiting cylinder is installed in the limiting hole;

[0021] The top end of the upper limit cylinder is connected to the positioning plate, and the bottom end of the upper limit cylinder is connected to the top end of the lower limit cylinder; the collet is installed in the upper mounting cavity and the lower mounting cavity, and the bottom end of the collet extends outside the lower limit cylinder.

[0022] In some embodiments of this utility model, a connecting rod is also included, wherein the top end of the expansion core is connected to the bottom end of the connecting rod by a stop bolt, and the top end of the connecting rod is connected to the driving mechanism.

[0023] In some embodiments of this utility model, the driving mechanism is a cylinder, and the piston rod end of the cylinder is connected to the top end of the expansion core.

[0024] In some embodiments of this utility model, a pre-compression component is further included, the pre-compression component comprising:

[0025] The upper connecting plate is provided with a first through hole for the cylinder fixing end to pass through;

[0026] A lower connecting plate is arranged below the upper connecting plate, and a second through hole is provided on the lower connecting plate;

[0027] A cylinder mounting plate is arranged between the upper connecting plate and the lower connecting plate and is connected to the lower connecting plate; the cylinder mounting plate is provided with mounting holes for the piston rod of the cylinder to pass through;

[0028] The clamping assembly is mounted on the lower connecting plate; the cylinder is mounted on the cylinder mounting plate, and the piston rod passes through the mounting hole and is connected to the clamping assembly; a plurality of guide posts are provided between the upper connecting plate and the lower connecting plate, and a spring is installed on each guide post. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the irregular busbar structure mentioned in the embodiments of this utility model;

[0030] Figure 2 This is a schematic diagram of the clamping mechanism for the irregular busbar in an embodiment of this utility model;

[0031] Figure 3 yes Figure 2 A sectional view;

[0032] Figure 4 yes Figure 3 The main view;

[0033] Figure 5 This is a schematic diagram of the usage state of the present invention;

[0034] Figure 6 This is a cross-sectional view of the present invention after the busbar is clamped and inserted into the motor;

[0035] Figure 7 This is a schematic diagram of the collet of the present invention.

[0036] In the picture:

[0037] 1000. Clamping mechanism;

[0038] 100. Clamping assembly;

[0039] 10. Installation components; 11. Positioning plate; 12. Upper limit cylinder; 13. Lower limit cylinder;

[0040] 20. Collet; 21. Frustum plate; 22. Circular cylindrical plate; 23. Third through hole; 24. Limiting step;

[0041] 30. Core expansion;

[0042] 40. Connecting rod;

[0043] 50. Locking bolts;

[0044] 60. Preload assembly; 61. Upper connecting plate; 62. Lower connecting plate; 63. Cylinder mounting plate; 64. Guide column; 65. Spring;

[0045] 200. Drive mechanism;

[0046] 300, busbar; 301, through hole;

[0047] 400, Motor; 401, Central shaft. Detailed Implementation

[0048] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0049] To facilitate understanding, before introducing the embodiments of this disclosure, a brief description of the relevant technical background and application scenarios of busbars will be provided. For example... Figure 1 As shown, the busbar 300 involved in this utility model is specifically designed for electric power steering (EPS) motors in automobiles. Its core function is to provide stable power transmission to key components such as the rotor and stator inside the motor.

[0050] Currently, the assembly of the busbar in the manufacturing process of EPS motors still faces significant challenges. Because the busbar is a single, irregularly shaped terminal, it requires precise matching with corresponding terminals on the motor's internal stator before reliable electrical connection is achieved through welding and other operations. However, existing technologies lack automated assembly equipment suitable for such complex structures, resulting in a high reliance on manual operation for busbar assembly. Specifically, operators must manually perform a series of steps, including clamping, precisely positioning, and assembling the busbar into the motor, which is not only inefficient but also makes it difficult to guarantee assembly accuracy and consistency.

[0051] The following is for reference. Figures 1-7 The present invention describes a clamping mechanism 1000 for an irregular busbar according to an embodiment of the present invention. The entire clamping mechanism includes a clamping component 100 and a driving mechanism 200. The irregular busbar 300 is provided with a through hole 301.

[0052] Specifically, the clamping assembly 100 has at least a first state and a second state. In the first state, the clamping assembly 100 is in a natural state, and the clamping part of the clamping assembly 100 can extend into the through hole 301. In the second state, the clamping assembly 100 is in an expanded state, and the clamping part of the clamping assembly 100 expands outward and abuts against the inner wall of the through hole 301 to clamp the irregular busbar 300. The driving mechanism 200 is connected to the clamping assembly 100 to drive the clamping assembly 100 to switch between the first state and the second state. For example, a circular through hole 301 is provided at the center of the irregular busbar 300, and the clamping part of the clamping assembly 100 cooperates with the through hole. Under normal circumstances, the clamping assembly 100 is in the first state.

[0053] Understandably, the entire clamping mechanism 1000 can be mounted on a machine operating table during use. When assembling the busbar 300, first move the clamping assembly 100 above the busbar 300 to be clamped; then, move the clamping assembly 100 down until its clamping part extends into the through hole 301. Then, start the drive mechanism 200 to switch the clamping assembly 100 from the first state to the second state, with the clamping part expanding outward and tightly against the inner wall of the through hole 301, generating a certain clamping force on the through hole 301 to clamp the busbar 300. Next, the clamping assembly 100, together with the lower clamped busbar 300, can be moved above the motor to be installed. After determining the installation angle, lower the clamping assembly 100 into the motor. Finally, by controlling the drive mechanism 200 to switch the clamping assembly 100 from the second state to the first state, the clamping part disengages from the inner wall of the through hole 301, thereby releasing the busbar 300.

[0054] According to the embodiment of the present utility model, the clamping mechanism for irregular busbars can clamp and release the busbar 300 through the cooperation of the clamping component 100 and the driving mechanism 200, which satisfies the clamping of irregular busbars and has good clamping performance.

[0055] In some embodiments of this utility model, reference is made to Figures 1 to 5As shown, the clamping assembly 100 may include a mounting assembly 10, a collet 20, and an expansion core 30. The mounting assembly 10 forms a first receiving cavity with an open bottom. The collet 20 defines a second receiving cavity and is disposed within the first receiving cavity. The top of the collet 20 is connected to the mounting assembly 10. The expansion core 30 is disposed within the second receiving cavity and is capable of vertical movement. The output end of the drive mechanism 200 extends into the second receiving cavity and is connected to the top end of the expansion core 30. In a first state, the expansion core 30 does not exert an outward pushing force on the collet 20, and the collet 20 is in a natural state. In a second state, the expansion core 30 is located at the lower part of the second receiving cavity and exerts an outward pushing force on the collet 20, with the bottom end of the collet 20 expanding outward and pressing against the inner wall of the through hole 301.

[0056] For example, the collet 20 has a T-shaped structure and may include a frustum plate 21 and an annular cylindrical plate 22 disposed on one side of the frustum plate 21. The annular cylindrical plate 22 has multiple third through holes 23 evenly spaced along its axial direction at its end away from the frustum plate 21. A limiting step 24 that mates with the through hole 301 is provided on the outer wall of the annular cylindrical plate 22 at the end away from the frustum plate 21. An inclined surface is provided on the inner wall of the annular cylindrical plate 22. When the expansion core 30 moves downward along the inclined surface, a pushing force is applied to the annular cylindrical plate 22, causing its outer wall to press tightly against the inner wall of the through hole 301. Further downward movement increases the force applied to the annular cylindrical plate 22, thereby increasing the clamping force of the annular cylindrical plate 20 on the through hole 301, thus achieving clamping of the busbar 300 at the through hole 301. The position of the expansion core 30 is adjusted by the drive mechanism 200. The drive mechanism 200 can be a cylinder, and the piston rod end of the cylinder is connected to the top end of the expansion core 30.

[0057] Considering that when the busbar 300 is assembled into the motor 400, there is also a central shaft 401 (i.e., the output shaft of the motor) inside the motor 400. If this shaft is touched during the assembly process, the motor product will be scrapped. Therefore, it is necessary to ensure that the collet 20 and the expansion core 30 do not touch the shaft during operation. In other words, the operable space of the collet 20 and the expansion core 30 is limited to the gap between the through hole and the shaft. In order to ensure the stability during operation and avoid product scrapping, the outer side of the bottom of the expansion core 30 is provided with a tapered surface. The expansion core 30 defines a third receiving cavity with an open bottom end. The third receiving cavity can accommodate the shaft inside the motor to be assembled. The size of the third receiving cavity is larger than the size of the shaft. Meanwhile, the bottom end of the annular cylindrical plate 22 must be able to penetrate deep into the through hole 301, while avoiding contact with the central shaft inside the motor to be assembled during the transition between the two states. Therefore, the thickness of the bottom end of the annular cylindrical plate 22 is relatively small, and it gradually increases from the direction away from the frustum plate 21 to the direction closer to the frustum plate 21. However, the overall thickness must be less than the gap between the through hole 301 and the shaft to ensure the stability and reliability of the entire clamping process.

[0058] In some embodiments of this utility model, reference is made to Figures 1 to 7As shown, the mounting assembly 10 may include a positioning plate 11, an upper limit cylinder 12, and a lower limit cylinder 13. The positioning plate 11 is arranged on top of the collet 20 and connected to the top end of the collet 20. The upper limit cylinder 12 defines an upper mounting cavity that is open at the top, and a limiting hole is provided at the bottom of the upper limit cylinder 12. The lower limit cylinder 13 defines a lower mounting cavity that is open at both the top and bottom, and the lower limit cylinder 13 is installed in the limiting hole. The top end of the upper limit cylinder 12 is connected to the positioning plate 11, and the bottom end of the upper limit cylinder 12 is connected to the top end of the lower limit cylinder 13. The collet 20 is installed in the upper mounting cavity and the lower mounting cavity, and the bottom end of the collet 20 extends outside the lower limit cylinder 13.

[0059] Understandably, during installation, the top of the collet 20 can be first connected and fixed to the positioning plate 11. Then, the upper limit cylinder 12 is moved upwards from the bottom of the collet 20 until it reaches the positioning plate 11, and then connected to the positioning plate 11. Next, the lower limit cylinder 13 is moved upwards from the bottom of the collet 20 until it reaches the upper limit cylinder 12, and then connected to the upper limit cylinder 12. Through the cooperation of the positioning plate 11, the upper limit cylinder 12, and the lower limit cylinder 13, the collet 20 and the expansion core 30 can be installed together into the upper and lower mounting cavities. This mounting assembly 10 not only protects the collet 20 and the expansion core 30, but also has a simple structure and is easy to assemble and disassemble.

[0060] In some embodiments of this utility model, reference is made to Figures 1 to 7 As shown, it may also include a connecting rod 40, the top end of the expansion core 30 is connected to the bottom end of the connecting rod 40 by a stop bolt 50, and the top of the connecting rod 40 is connected to the drive mechanism 200.

[0061] Understandably, the stop bolt 50 can be positioned within the third receiving cavity and installed on top of the expansion core 30. The stop bolt 50 passes through the expansion core 30 and connects to one end of the connecting rod 40; the other end of the connecting rod 40 is connected to the piston rod. The piston rod, connecting rod 40, stop bolt 50, and expansion core 30 are arranged coaxially. The position of the expansion core 30 can be adjusted by controlling the movement of the piston rod within the cylinder. For example, by controlling the piston rod to extend outward, the expansion core 30 can be pushed downward under the action of the connecting rod 40 and the stop bolt 50, causing the collet 20 to expand outward and clamp the busbar 300. When the clamping position is reached, the piston rod can be retracted, and under the action of the connecting rod 40 and the stop bolt 50, the expansion core 30 moves upward, the collet 20 returns to its natural state, and the busbar 300 is released.

[0062] In some embodiments of this utility model, reference is made to Figures 1 to 7As shown, it also includes a pre-compression assembly 60, which includes an upper connecting plate 61, a lower connecting plate 62, and a cylinder mounting plate 63. The upper connecting plate 61 has a first through hole for the fixed end of the cylinder to pass through; the lower connecting plate 62 is arranged below the upper connecting plate 61 and has a second through hole; the cylinder mounting plate is arranged between the upper connecting plate 61 and the lower connecting plate 62 and is connected to the lower connecting plate 62; the cylinder mounting plate 63 has a mounting hole for the piston rod of the cylinder to pass through. The clamping assembly 100 is mounted on the lower connecting plate 62; the cylinder is mounted on the cylinder mounting plate 63, and the piston rod passes through the mounting hole and connects to the clamping assembly 100; a plurality of guide posts 64 are provided between the upper connecting plate 61 and the lower connecting plate 62, and a spring 65 is mounted on each guide post 64.

[0063] To ensure the reliability and stability of the entire clamping mechanism, the clamping assembly 100 and the drive mechanism 200 can be assembled together using the pre-pressure assembly 60, and then the assembly can be installed on the operating table to prepare for continuous automatic operation. Specifically, the cylinder mounting plate 63 can be connected and fixed to the lower connecting plate 62, and the cylinder can be fixedly mounted on the cylinder mounting plate 63, ensuring that the piston rod can pass through the mounting hole and the second through hole, and can reciprocate along the mounting hole and the second through hole. Then, the positioning plate of the mounting assembly 10 is connected to the lower connecting plate 62, ensuring that the connecting rod 40 coaxially connected to the end of the piston rod can extend into the upper mounting cavity, and the stop bolt 50 passes through the top of the expansion core 30 and is also coaxially connected to the connecting rod 40. It should be noted that the clamping assembly can be installed as an independent module on the lower connecting plate 62 for modular installation. The upper connecting plate 61 and the lower connecting plate 62 are connected by the guide post 64 and the spring 65, and the fixed end of the cylinder is arranged through the first through hole. The pre-compression component 60 can be formed into another module by a cylinder, realizing a modular design that is easy to install and disassemble.

[0064] In use, the upper connecting plate 61 can be mounted on the slider of a certain moving module on the worktable using multiple mounting posts. By adjusting the position of the slider, the height, forward and backward positions of the entire clamping mechanism can be adjusted. When the clamping mechanism is moved above the busbar 300 to be clamped, the entire clamping mechanism can be lowered so that the lower part of the collet 20 is inserted into the through hole 301. Due to the guide post 64 and spring 65 in the pre-compression assembly 60, pre-compression can be achieved during the downward movement of the collet 20 to avoid damage to components such as the busbar 300 during the downward movement. After the collet 20 is moved into the through hole 301, the piston rod is extended and the bottom of the collet 20 expands outward to clamp the busbar 300 at the through hole 301. Then, the entire clamping mechanism is moved upward and above the motor to be installed, so that the entire clamping mechanism is moved downward. During the downward movement, avoid touching the shaft at the center of the motor. After falling into the motor, the piston rod is retracted and the collet 20 returns to the first state, completing the release of the busbar 300.

[0065] In summary, the clamping mechanism of this utility model uses the central through hole of the busbar as an auxiliary positioning reference, and the cooperation between various components can achieve multi-directional uniform force application, complete the clamping of irregular busbars, and improve clamping stability.

[0066] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0068] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0069] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A clamping mechanism for an irregular busbar, wherein the irregular busbar has through holes, characterized in that, include: A clamping assembly having at least a first state and a second state. In the first state, the clamping assembly is in a natural state, and the clamping part of the clamping assembly can extend into a through hole. In the second state, the clamping assembly is in an outward expansion state, and the clamping part of the clamping assembly expands outward and abuts against the inner wall of the through hole to achieve clamping of irregular busbars. A drive mechanism connected to the clamping assembly to drive the clamping assembly to switch between a first state and a second state.

2. The clamping mechanism for irregular busbars according to claim 1, characterized in that, The clamping assembly includes: The mounting assembly has a bottom-open first receiving cavity; A collet, wherein a second receiving cavity is defined within the collet, the collet is disposed within the first receiving cavity, and the top of the collet is connected to the mounting assembly; An expansion core, which is movable up and down within the second receiving cavity; The output end of the drive mechanism extends into the second receiving cavity and connects to the top of the expansion core. In the first state, the expansion core does not exert an outward pushing force on the collet, and the collet is in a natural state. In the second state, the expansion core is located at the lower part of the second receiving cavity and exerts an outward pushing force on the collet, and the bottom end of the collet expands outward and abuts against the inner wall of the through hole.

3. The clamping mechanism for irregular busbars according to claim 2, characterized in that, The installation components include: A positioning plate is disposed on the top of the collet and connected to the top end of the collet; An upper limit cylinder defines an upper mounting cavity with an open top, and a limiting hole is provided at the bottom of the upper limit cylinder; A lower limiting cylinder defines a lower mounting cavity that is open at both the top and bottom, and the lower limiting cylinder is installed in the limiting hole; The top end of the upper limit cylinder is connected to the positioning plate, and the bottom end of the upper limit cylinder is connected to the top end of the lower limit cylinder; the collet is installed in the upper mounting cavity and the lower mounting cavity, and the bottom end of the collet extends outside the lower limit cylinder.

4. The clamping mechanism for irregular busbars according to claim 2, characterized in that, It also includes a connecting rod, the top end of which is connected to the bottom end of the connecting rod via a stop bolt, and the top end of the connecting rod is connected to the drive mechanism.

5. The clamping mechanism for irregular busbars according to claim 4, characterized in that, The driving mechanism is a cylinder, and the piston rod end of the cylinder is connected to the top end of the expansion core.

6. The clamping mechanism for irregular busbars according to claim 5, characterized in that, It also includes a pre-compression component, the pre-compression component comprising: The upper connecting plate is provided with a first through hole through which the fixed end of the cylinder passes; A lower connecting plate is arranged below the upper connecting plate, and a second through hole is provided on the lower connecting plate; A cylinder mounting plate is arranged between the upper connecting plate and the lower connecting plate and is connected to the lower connecting plate; the cylinder mounting plate is provided with mounting holes for the piston rod of the cylinder to pass through; The clamping assembly is mounted on the lower connecting plate; the cylinder is mounted on the cylinder mounting plate, and the piston rod passes through the mounting hole and is connected to the clamping assembly; a plurality of guide posts are provided between the upper connecting plate and the lower connecting plate, and a spring is installed on each guide post.

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