A turning table for crawler chain link processing machine tool

Abstract

The present invention discloses a turning table for a crawler chain link processing machine tool, which relates to the field of crawler chain link processing, and includes a base and a processing table arranged above the base, wherein rotators are symmetrically arranged at the left and right ends of the processing table, and the outer sides of the rotators are connected to support seats installed above the base, and the processing table rotates above the base through the rotator, and a first positioning seat is arranged above the processing table, and a first movable seat is arranged on the right side of the first positioning seat. The turning table for a crawler chain link processing machine tool is provided with a rotatable processing table so that the device can drive the chain link to be turned and adjusted, thereby facilitating different processing needs, and the limiting effect of the positioning seat and the movable seat can be used to adaptively position the chain link to prevent it from falling during turning, thereby ensuring processing quality, and multiple workstations are provided at the same time, and multiple workpieces can be processed at one time, thereby improving processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of track link processing, and specifically to a turnover table for a track link processing machine tool. Background Art

[0002] When processing track links, the links can be placed on a processing table, and then the links can be processed by corresponding processing equipment such as drilling, grinding or other methods.

[0003] Prior Art 1 (a Chinese patent with application number CN202411596001.7 and published on January 10, 2025) A numerical control boring and drilling fixture for precise processing of track links, including a U-shaped frame. A clamping mechanism for clamping track links is arranged on the upper part of the U-shaped frame, and a feeding mechanism is arranged on the lower part of the U-shaped frame. Blow pipes are fixedly installed at equal intervals in the front-back direction on the upper part of the U-shaped frame. This invention rotates the mounting plate to a vertical state, and then moves the U-shaped frame to the left to drive the storage part to move to the left, which can enable the push plate assembly to push the supporting plate to move to the left, so that the processed track links on the mounting plate can automatically fall under the action of gravity. Then, the feeding assembly automatically places the track links to be processed on the mounting plate, thus automatically completing the replacement of the track links and improving the processing efficiency. This invention can blow the metal chips on the mounting plate through the blow pipes to automatically clean the mounting plate; Prior Art 2 (a Chinese patent with application number CN202010625803.1 and published on January 4, 2022) A processing tool fixture for the track links of an excavator chassis, including a bottom plate, a longitudinal clamping assembly arranged on the bottom plate, a first transverse clamping assembly and a second transverse clamping assembly located on both sides of the longitudinal clamping assembly; the longitudinal clamping head of the longitudinal clamping assembly rotates and moves longitudinally with the second end as the axis, so that the first end of the longitudinal clamping head approaches or moves away from the link; the first movable block of the first transverse clamping assembly can tightly press the link in the transverse direction; the second movable block of the second transverse clamping assembly can tightly press the link in the transverse direction. With such a setting, by longitudinally driving, first transversely driving and second transversely driving to clamp and release the workpiece, the degree of automation control of processing and assembly can be greatly improved, which is beneficial to simplifying the operation process and improving work efficiency. Moreover, by applying clamping forces in multiple directions, it is beneficial to clamp the link tightly to prevent the link from slipping and loosening.

[0004] During the processing of track links, it is usually necessary to flip the workpiece to complete processing at different angles. When flipping, the workpiece is likely to fall, which not only affects the processing quality but may also cause damage to the equipment and personnel. And when processing the links, track links of different sizes cannot be synchronously limited on the processing table, and generally only workpieces of the same size can be limited at multiple stations, reducing the applicable range and flexibility of use of the processing table. Summary of the Invention

[0005] The purpose of the present invention is to provide a turning table for a crawler chain link processing machine tool to solve the problem raised in the above background technology that during the processing of the crawler chain links, the workpiece usually needs to be turned over to complete processing at different angles, and the workpiece is prone to falling during the turning, which not only affects the processing quality, but may also cause damage to equipment and personnel. In addition, when processing the chain links, chain links of different sizes cannot be limited synchronously on the processing table.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a turning table for a crawler chain link processing machine tool, comprising a base and a processing table arranged above the base, rotators are symmetrically provided at the left and right ends of the processing table, and the outer sides of the rotators are connected to a support seat installed above the base, and the processing table rotates above the base through the rotator, a first positioning seat is provided above the processing table, and a first movable seat is provided on the right side of the first positioning seat, the first positioning seat and the first movable seat provide clamping for the chain link, a second positioning seat is provided below the processing table, and a second movable seat is provided on the right side of the second positioning seat, the outer sides of the first movable seat and the second movable seat are both connected with a moving control mechanism to control the movement of the second movable seat and the first movable seat, and the moving direction of the second movable seat is opposite to that of the first movable seat.

[0007] To further optimize this technical solution, the first positioning seat and the second positioning seat are arranged in pairs on the outside of the processing table, and the paired first positioning seat and the second positioning seat are symmetrically arranged front to back about the center of the processing table, providing paired processing stations for the processing table.

[0008] Further optimizing the technical solution, the movement control mechanism includes a fixed block, a driving plate, a connecting mechanism and a driving mechanism;

[0009] The fixed blocks are respectively fixed to the surfaces of the first movable seat and the second movable seat, and the fixed blocks are located inside the processing table and between the processing tables to form a horizontal sliding structure;

[0010] A driving plate is provided on the left side of the fixed block to provide driving force for the movement of the fixed block;

[0011] The connecting mechanism is arranged on the right side of the driving plate and controls the connection between the driving plate and the fixing block;

[0012] The driving mechanism is connected to the driving plate to control the movement of the driving plate.

[0013] Further optimizing the technical solution, the driving mechanism includes a connecting frame, a driving block and a reverse control mechanism;

[0014] Connecting frame, fixed to the right side of the driving plate;

[0015] The driving block is arranged on the inner side of the connecting frame, and a left-right sliding structure is formed between the driving block and the processing table;

[0016] The reverse control mechanism is connected to the driving block to control the movement of the driving block.

[0017] Further optimizing the technical solution, the reverse control mechanism includes a first driving rod, a transmission rod, a motor, a second driving rod and a transmission gear;

[0018] A first driving rod, which passes through the driving block and forms a threaded connection between the driving blocks;

[0019] The transmission rod is fixed to the left end of the first driving rod;

[0020] The motor is connected to the transmission rod to control the rotation of the transmission rod;

[0021] a second driving rod, located below the first driving rod, and controlling the fixed block on the outer side of the second movable seat;

[0022] The transmission gears are respectively arranged on the left sides of the first driving rod and the second driving rod, and the two sets of transmission gears are meshed with each other.

[0023] Further optimizing the technical solution, the connecting mechanism includes a movable cylinder, a torsion spring, a control rope and a locking mechanism;

[0024] The movable cylinder is rotatably mounted inside the fixed block;

[0025] A torsion spring is installed on the outside of the movable cylinder to provide a rotational reset force for the movable cylinder;

[0026] A control rope is wound around the surface of the movable cylinder, and the left end of the control rope is fixedly connected to the driving plate;

[0027] The locking mechanism is arranged inside the processing table to lock the position of the fixed block.

[0028] Further optimizing the technical solution, the locking mechanism includes a moving rod, a guide block and a limit buffer mechanism;

[0029] The movable rod passes through the movable cylinder and forms a threaded connection between the movable cylinder;

[0030] The guide block is fixed above the moving rod, and an up and down sliding structure is formed between the guide block and the fixed block;

[0031] The limit buffer mechanism is arranged below the moving rod to provide buffering for the continuous downward movement of the moving rod.

[0032] Further optimizing the technical solution, the position limiting buffer mechanism includes a clamping block, a blocking plate, a clamping slot and a reset spring;

[0033] A card block is fixed below the moving rod;

[0034] A blocking plate is arranged on the outside of the clamping block, and an up-and-down sliding structure is formed between the blocking plate and the processing table;

[0035] The card slots are evenly and horizontally arranged on the upper surface of the blocking plate, and a card engagement structure is formed between the card slots and the card blocks;

[0036] The return spring is arranged below the blocking plate to provide a return thrust for the blocking plate.

[0037] To further optimize the technical solution, a synchronous control mechanism is provided on the outer sides of the first positioning seat and the second positioning seat to control the clamping state of the chain links.

[0038] Further optimizing this technical solution, the synchronous control mechanism includes a linkage plate, a hydraulic rod and a pressure sensor;

[0039] A linkage plate is fixed on the inner sides of the first positioning seat and the second positioning seat;

[0040] The hydraulic rod is connected to the linkage plate to control the movement of the linkage plate;

[0041] The pressure sensor is arranged on the surfaces of the first positioning seat and the second positioning seat to detect the clamping force thereof.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The rotatable processing table setting enables the device to drive the chain links to be flipped and adjusted, thereby facilitating different processing needs. In combination with the limiting effect of the positioning seat and the movable seat, the chain links can be adaptively positioned to prevent them from falling during flipping, thereby ensuring the processing quality. At the same time, multiple workstations are set up, and multiple workpieces can be processed at one time, thereby improving processing efficiency.

[0044] Positioning seats and movable seats are set on the upper and lower surfaces of the processing table. After the processing table is flipped down, the workpiece can be easily dropped. The positioning seats and movable seats after turning up can continue to place the chain links. While limiting the chain links above the processing table, the limit of the chain links below the processing table is automatically released to achieve the unloading effect.

[0045] The movement of the movable seat can be controlled by the driving mechanism, and the first movable seat and the second movable seat can move synchronously in opposite directions, thereby realizing automatic unloading and clamping of subsequent products, and the paired first movable seat and the second movable seat can move different distances, thereby limiting chain links of different sizes.

[0046] The rotation of the movable cylinder can be controlled by the control rope. After one set of movable seats completes clamping, the driving block continues to move to drive the movable cylinder to rotate. The movable cylinder can drive the movable rod to move to limit the position of the fixed block, so that it maintains a stable clamping state. The other set of movable seats can continue to move to clamp the workpiece.

[0047] The first positioning seat and the second positioning seat can be controlled to move by the hydraulic rod to control the clamping force, and at the same time the first movable seat and the second movable seat can be stably engaged to ensure the stability of the chain link during subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0049] Figure 2 This is a schematic diagram of the top view of the base structure of the present invention;

[0050] Figure 3 This is a bottom view of the structure of the processing platform of the present invention;

[0051] Figure 4 This is a schematic diagram of the main cross-sectional structure of the processing platform of the present invention;

[0052] Figure 5 This is a schematic diagram of the top-sectional structure of the processing platform of the present invention;

[0053] Figure 6 This is a schematic diagram of the three-dimensional structure of the driving plate of the present invention;

[0054] Figure 7 This is a schematic diagram of the three-dimensional structure of the first movable seat of the present invention;

[0055] Figure 8 This is a schematic diagram of the main structure of the fixing block of the present invention;

[0056] Figure 9 This is a schematic diagram of the main cross-sectional structure of the fixing block of the present invention;

[0057] Figure 10 For the present invention Figure 8 The enlarged structural diagram at point a is shown in the figure.

[0058] In the figure: 1. Base; 2. Support seat; 3. Rotator; 4. Processing table; 5. First positioning seat; 6. First movable seat; 7. Linkage plate; 8. Hydraulic rod; 9. Pressure sensor; 10. Second positioning seat; 11. Second movable seat; 12. Fixed block; 13. Drive plate; 14. Connecting frame; 15. Drive block; 16. First drive rod; 17. Transmission rod; 18. Motor; 19. Second drive rod; 20. Transmission gear; 21. Movable cylinder; 22. Torsion spring; 23. Control rope; 24. Moving rod; 25. Guide block; 26. Block; 27. Blocking plate; 28. Slot; 29. Return spring. DETAILED DESCRIPTION

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0060] See also Figures 1-10 , Embodiment 1: The present invention provides the following technical solutions: A turning table for a crawler chain link processing machine tool, comprising a base 1 and a processing table 4 arranged above the base 1, rotators 3 are symmetrically arranged on the left and right ends of the processing table 4, and the outer side of the rotator 3 is connected to a support seat 2 installed above the base 1, the processing table 4 rotates above the base 1 through the rotator 3, a first positioning seat 5 is arranged above the processing table 4, and a first movable seat 6 is arranged on the right side of the first positioning seat 5, the first positioning seat 5 and the first movable seat 6 provide clamping for the chain link, and a lower portion of the processing table 4 is provided There is a second positioning seat 10, and a second movable seat 11 is arranged on the right side of the second positioning seat 10. The outer sides of the first movable seat 6 and the second movable seat 11 are connected with a moving control mechanism to control the movement of the second movable seat 11 and the first movable seat 6, and the moving direction of the second movable seat 11 is opposite to the moving direction of the first movable seat 6. The first positioning seat 5 and the second positioning seat 10 are arranged in pairs on the outer side of the processing table 4, and the paired first positioning seat 5 and the second positioning seat 10 are arranged symmetrically front and back about the center of the processing table 4, providing paired processing stations for the processing table 4.

[0061] When in use, the track chain link to be processed can be placed above the processing table 4, so that its left side is connected to the first positioning seat 5, and then the first movable seat 6 is controlled to move by the mobile control mechanism, and the first positioning seat 5 is cooperated with the first positioning seat 5 to realize the clamping and limiting of the track chain link. The chain link can be processed subsequently, and the processing table 4 can be controlled to rotate by the rotator 3 to drive the chain link to move and adjust the processing position. After the processing is completed, the processing table 4 can be rotated half a circle to move the chain link to the bottom of the processing table 4, and the second positioning seat 10 and the second movable seat 11 are moved to the top of the processing table 4. The product can continue to be placed on the inside of the second positioning seat 10 and the second movable seat 11 to clamp it. At the same time, the first movable seat 6 can move to the right to release the limit on the chain link, so that the chain link falls and can be collected.

[0062] Embodiment 2: Based on embodiment 1, a movement control mechanism is disclosed, including a fixed block 12, a driving plate 13, a connecting mechanism and a driving mechanism. The fixed block 12 is respectively fixed to the surfaces of the first movable seat 6 and the second movable seat 11, and the fixed block 12 is located inside the processing table 4 and between the processing table 4 to form a horizontal sliding structure. The driving plate 13 is arranged on the left side of the fixed block 12 to provide driving force for the movement of the fixed block 12. The connecting mechanism is arranged on the right side of the driving plate 13 to control the connection between the driving plate 13 and the fixed block 12. The driving mechanism is connected to the driving plate 13 to control the movement of the driving plate 13. The driving mechanism includes a connecting frame 14, a driving block 15 and a reverse control mechanism. The connecting frame 14 is fixed to the right side of the driving plate 13. The driving block 15 is arranged on the inner side of the connecting frame 14 , and a left-right sliding structure is formed between the driving block 15 and the processing table 4, and a reverse control mechanism is connected to the driving block 15 to control the movement of the driving block 15. The reverse control mechanism includes a first driving rod 16, a transmission rod 17, a motor 18, a second driving rod 19 and a transmission gear 20. The first driving rod 16 passes through the driving block 15 and forms a threaded connection between the driving block 15. The transmission rod 17 is fixed to the left end of the first driving rod 16. The motor 18 is connected to the transmission rod 17 to control the rotation of the transmission rod 17. The second driving rod 19 is located below the first driving rod 16. The second driving rod 19 controls the fixed block 12 outside the second movable seat 11. The transmission gear 20 is respectively arranged on the left sides of the first driving rod 16 and the second driving rod 19, and the two sets of transmission gears 20 are engaged with each other.

[0063] When controlling the movement of the first movable seat 6, the first driving rod 16 can be driven to rotate by the motor 18. When the first driving rod 16 rotates, the second driving rod 19 is driven to rotate synchronously in the opposite direction through the meshing transmission of the transmission gear 20, so that the first driving rod 16 drives the driving block 15 and the first movable seat 6 to move, and at the same time, the second driving rod 19 drives the second movable seat 11 to move in the opposite direction, thereby realizing the clamping and contact clamping control of the chain links.

[0064] Embodiment 3: Based on embodiment 2, a connecting mechanism is disclosed, including a movable cylinder 21, a torsion spring 22, a control rope 23 and a locking mechanism. The movable cylinder 21 is rotatably mounted inside the fixed block 12. The torsion spring 22 is mounted on the outside of the movable cylinder 21 to provide a rotational reset force for the movable cylinder 21. The control rope 23 is wound around the surface of the movable cylinder 21, and the left end of the control rope 23 is fixedly connected to the driving plate 13. The locking mechanism is arranged inside the processing table 4 to lock the position of the fixed block 12. The locking mechanism includes a moving rod 24, a guide block 25 and a limit buffer mechanism. The moving rod 24 passes through the movable cylinder 21 and the movable cylinder 21 to form a threaded connection. The guide block 25 is fixed above the moving rod 24, and an up and down sliding structure is formed between the guide block 25 and the fixed block 12. The limit buffer mechanism is arranged below the moving rod 24 to provide a buffer for the continuous downward movement of the moving rod 24. The limit buffer mechanism includes a card Block 26, blocking plate 27, slot 28 and return spring 29, block 26, fixed below the moving rod 24, blocking plate 27, arranged on the outside of the block 26, and an up and down sliding structure is formed between the blocking plate 27 and the processing table 4, the slot 28 is horizontally and evenly opened on the upper surface of the blocking plate 27, and a locking structure is formed between the slot 28 and the block 26, and the return spring 29 is arranged below the blocking plate 27 to provide a reset thrust for the blocking plate 27. The outer sides of the first positioning seat 5 and the second positioning seat 10 are both provided with a synchronous control mechanism to control the clamping state of the chain link. The synchronous control mechanism includes a linkage plate 7, a hydraulic rod 8 and a pressure sensor 9. The linkage plate 7 is fixed on the inner sides of the first positioning seat 5 and the second positioning seat 10. The hydraulic rod 8 is connected to the linkage plate 7 to control the movement of the linkage plate 7. The pressure sensor 9 is arranged on the surfaces of the first positioning seat 5 and the second positioning seat 10 to detect its clamping force.

[0065] When the first movable seat 6 is used to clamp chain links of different sizes, after one group of first movable seats 6 completes clamping, the driving block 15 continues to move, and the driving block 15 will push the driving plate 13 to pull the control rope 23 to move, so that the control rope 23 drives the movable cylinder 21 to rotate, and the movable cylinder 21 drives the moving rod 24 to move vertically, so that the block 26 under the moving rod 24 is connected with the slot 28, and the fixed block 12 is limited. As the movable cylinder 21 rotates, the moving rod 24 can continuously press down the blocking plate 27 to move, so that the other group of first movable seats 6 can continue to move to complete the clamping. After the two groups of first movable seats 6 complete the clamping, the first movable seat 6 is positioned by the engagement of the block 26 and the slot 28. At the same time, the first positioning seat 5 can be controlled to move by the hydraulic rod 8 to tighten the chain link, and the clamping force can be monitored in conjunction with the pressure sensor 9.

[0066] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0067] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A turning table for a crawler chain link processing machine tool, comprising a base (1) and a processing table (4) arranged above the base (1); Its characteristics are: The processing table (4) is symmetrically provided with rotators (3) at both ends, and the outer side of the rotator (3) is connected to a support seat (2) installed above the base (1). The processing table (4) rotates above the base (1) through the rotator (3). A first positioning seat (5) is provided above the processing table (4), and a first movable seat (6) is provided on the right side of the first positioning seat (5). The first positioning seat (5) and the first movable seat (6) provide clamping for the chain link. A second positioning seat (10) is provided below the processing table (4), and a second movable seat (11) is provided on the right side of the second positioning seat (10). The outer sides of the first movable seat (6) and the second movable seat (11) are both connected to a movement control mechanism to control the movement of the second movable seat (11) and the first movable seat (6), and the movement direction of the second movable seat (11) is opposite to the movement direction of the first movable seat (6). The first positioning seat (5) and the second positioning seat (10) are arranged in pairs outside the processing table (4), and the paired first positioning seat (5) and the second positioning seat (10) are arranged symmetrically in front and back with respect to the center of the processing table (4), providing paired processing stations for the processing table (4); The movement control mechanism comprises a fixed block (12), a drive plate (13), a connecting mechanism and a drive mechanism; A fixed block (12) is fixed to the surfaces of the first movable seat (6) and the second movable seat (11), respectively, and the fixed block (12) is located inside the processing table (4) and between the processing table (4) to form a horizontal sliding structure; A driving plate (13) is arranged on the left side of the fixed block (12) to provide a driving force for the movement of the fixed block (12); A connecting mechanism, arranged on the right side of the driving plate (13), controls the connection between the driving plate (13) and the fixing block (12); A driving mechanism connected to the driving plate (13) to control the movement of the driving plate (13); The connecting mechanism comprises a movable cylinder (21), a torsion spring (22), a control rope (23) and a locking mechanism; A movable cylinder (21) is rotatably mounted inside the fixed block (12); A torsion spring (22) is mounted on the outside of the movable cylinder (21) to provide a rotational reset force for the movable cylinder (21); A control rope (23) is wound around the surface of the movable cylinder (21), and the left end of the control rope (23) is fixedly connected to the driving plate (13); The locking mechanism is arranged inside the processing table (4) and locks the position of the fixed block (12).

2. The turning table for a crawler chain link processing machine tool according to claim 1, characterized in that: The driving mechanism comprises a connecting frame (14), a driving block (15) and a reverse control mechanism; A connecting frame (14) is fixed to the right side of the driving plate (13); A driving block (15) is arranged on the inner side of the connecting frame (14), and a left-right sliding structure is formed between the driving block (15) and the processing table (4); The reverse control mechanism is connected to the driving block (15) to control the movement of the driving block (15).

3. The turning table for a crawler chain link processing machine tool according to claim 2, characterized in that: The reverse control mechanism comprises a first driving rod (16), a transmission rod (17), a motor (18), a second driving rod (19) and a transmission gear (20); A first driving rod (16) passes through the driving block (15) and forms a threaded connection between the driving block (15); The transmission rod (17) is fixed to the left end of the first driving rod (16); A motor (18) is connected to the transmission rod (17) to control the rotation of the transmission rod (17); A second driving rod (19) is located below the first driving rod (16), and the second driving rod (19) controls the fixed block (12) outside the second movable seat (11); The transmission gears (20) are respectively arranged on the left side of the first driving rod (16) and the second driving rod (19), and the two sets of transmission gears (20) are meshed with each other.

4. The turning table for a crawler chain link processing machine tool according to claim 1, characterized in that: The locking mechanism comprises a moving rod (24), a guide block (25) and a position limiting buffer mechanism; The movable rod (24) passes through the movable cylinder (21) and forms a threaded connection between the movable cylinder (21); The guide block (25) is fixed above the moving rod (24), and an up-and-down sliding structure is formed between the guide block (25) and the fixed block (12); The position limiting buffer mechanism is arranged below the moving rod (24) and provides buffering for the continuous downward movement of the moving rod (24).

5. The turning table for a crawler chain link processing machine tool according to claim 4, characterized in that: The position limiting buffer mechanism comprises a clamping block (26), a blocking plate (27), a clamping slot (28) and a return spring (29); A card block (26) is fixed below the moving rod (24); A blocking plate (27) is arranged on the outside of the clamping block (26), and an up-and-down sliding structure is formed between the blocking plate (27) and the processing table (4); The card slot (28) is evenly and horizontally provided on the upper surface of the blocking plate (27), and a card engaging structure is formed between the card slot (28) and the card block (26); A return spring (29) is provided below the blocking plate (27) to provide a return thrust for the blocking plate (27).

6. The turning table for crawler chain link processing machine tool according to claim 5, characterized in that: Synchronous control mechanisms are provided on the outer sides of the first positioning seat (5) and the second positioning seat (10) to control the clamping state of the chain links.

7. The turning table for a crawler chain link processing machine tool according to claim 6, characterized in that: The synchronous control mechanism includes a linkage plate (7), a hydraulic rod (8) and a pressure sensor (9); A linkage plate (7) fixed to the inner sides of the first positioning seat (5) and the second positioning seat (10); A hydraulic rod (8) is connected to the linkage plate (7) to control the movement of the linkage plate (7); A pressure sensor (9) is arranged on the surfaces of the first positioning seat (5) and the second positioning seat (10) to detect the clamping force thereof.

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