A load switching assisting mechanical arm suitable for EMU traction pull rod test

Abstract

The utility model provides a kind of load switching power-assisted mechanical arm suitable for EMU traction pull rod test, it is related to rail transit technical field.Power-assisted mechanical arm includes: moving trolley, cantilever lifting assembly is installed on the surface of moving trolley, pneumatic control assembly is installed on cantilever lifting assembly, pneumatic control assembly includes gas control box and gas control button box, the end of cantilever lifting assembly is installed with turnover clamp, pneumatic control assembly is used to control turnover clamp action, the taking and placing of EMU traction pull rod are realized.The utility model can carry out the handling operation of traction pull rod by movable special auxiliary transfer equipment, realize the efficient mode of on-site operation by using pneumatic mechanical arm to assist artificial, and quick load switching can be carried out according to different maintenance models.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, and in particular to a load switching assistive robotic arm suitable for traction rod testing of EMU trains. Background Technology

[0002] In the field of high-speed train maintenance, traction rods, as key components connecting bogies and car bodies, have their strength performance and the stiffness performance of their installation joints as critical quality control points during maintenance. Currently, static stiffness tests on traction rod joints are performed on a stiffness testing bench. Traction rods are arranged horizontally in two rows of four on a pallet, with eight traction rods per pallet. Before testing, a forklift transports the pallets to the stiffness testing machine in the Class III maintenance room. Then, the traction rods are manually removed from the pallets, adjusted from a horizontal to a vertical position, and smoothly placed into the testing machine for testing. Each traction rod undergoes a static stiffness test on its two rubber joints in sequence.

[0003] Because the towing rod is heavy and the weight varies between different vehicle models, it is manually handled by workers throughout the process, resulting in high labor intensity for employees and failing to meet ergonomic standards. This is a major pain point in the current towing rod stiffness test.

[0004] Utility model patent CN220446495U discloses a semi-automatic assembly robot based on pneumatic system control, including a base plate. Connecting blocks are fixedly connected to both ends of the base plate, and an electric push rod is connected to the lower surface of each connecting block. A suction cup is installed at the other end of each electric push rod. A mounting plate is installed on one end of the upper surface of the base plate, with a mounting groove in the center of the upper surface. A lifting assembly is installed in the mounting groove, and a lifting plate is connected to the other end of the lifting assembly. An auxiliary groove is installed in the center of the lower surface of the lifting plate. A pneumatic robotic arm body is installed on the upper surface of the lifting plate, and a connecting plate is movably connected to the other end of the pneumatic robotic arm body. Adjustment grooves are installed on the center and both sides of one side surface of the connecting plate. This utility model has the advantages of automatically adjusting the height of the robot according to the height of the workpiece during assembly and high operational stability. However, the aforementioned robot cannot perform operations such as flipping or rotating the workpiece in specific postures, and cannot meet the requirements of experimental processes.

[0005] Publication No. CN207759669U discloses a purely pneumatic-assisted robotic arm device, including a general-purpose robotic arm, a control unit, and a flipping mechanism. The flipping mechanism includes a gripper bracket connected to the general-purpose robotic arm, a pneumatic gripper, and a pneumatic drive mechanism. The pneumatic drive mechanism includes a flipping cylinder connected to the gripper bracket, with a flipping connecting rod hinged to the cylinder. A flipping shaft seat is fixedly connected to the end of the gripper bracket, and a transmission gear connected to the flipping connecting rod is disposed within the flipping shaft seat. A flipping rotating shaft, which is driven by the transmission gear, is disposed below the flipping shaft seat. The pneumatic gripper is disposed on the flipping rotating shaft, and a limit structure is disposed on the flipping shaft seat. This utility model has the characteristics of simple and compact structure, replaceable gripper, strong compatibility, and convenient and flexible operation, and has good prospects for promotion and application. However, the above-mentioned robotic arm device is fixed and inconvenient to move, lacking the ability to move and cross rails.

[0006] Patent document CN217572888U discloses an auxiliary pneumatic robotic arm, including a support frame, a connecting structure, a gripping structure, and a control box. The connecting structure includes a connecting component, a rotating part, a drive component, and a gripping arm. The connecting component is rotatably mounted on the support frame, and the rotating part is rotatably mounted on the connecting component. One end of the drive component is mounted on the rotating part, and the other end is connected to the gripping arm, used to drive the gripping arm to rotate relative to the rotating part. The gripping arm can rotate around a first central axis with the rotating part when driven, and can rotate around a second central axis when driven by the drive component. The first central axis and the second central axis are perpendicular. The gripping structure is mounted on the gripping arm and located at the end opposite to the drive component. The control box includes a controller, which is electrically connected to the drive component and the gripping structure, used to control the gripping structure to grip a long strip of material. However, the above-mentioned robotic arm is still fixed, and in actual operation, the operator needs to frequently use the lifting function of the control box to operate the lifting of the material, increasing the operability of the operation and resulting in poor human-machine interface.

[0007] In view of the above reasons, this utility model provides a load switching assistive robotic arm suitable for EMU traction rod testing, which can be easily moved, meet various operational requirements of the testing process, and reduce the labor intensity of manual operations. Utility Model Content

[0008] The purpose of this utility model is to provide a load switching assistive robotic arm suitable for EMU traction rod testing. It can perform traction rod handling operations through a mobile dedicated auxiliary transfer device, realizing an efficient mode of using a pneumatic robotic arm to assist manual on-site operations.

[0009] This utility model provides a load switching assistive robotic arm suitable for EMU traction rod testing, comprising: a mobile trolley, a cantilever lifting assembly mounted on the surface of the mobile trolley, a pneumatic control assembly mounted on the cantilever lifting assembly, the pneumatic control assembly including a pneumatic control box and a pneumatic control button box, and a flipping clamp mounted at the end of the cantilever lifting assembly. The pneumatic control assembly is used to control the movement of the flipping clamp to realize the picking and placing of the EMU traction rod.

[0010] Preferably, the mobile trolley includes a trolley body, at least one steering wheel and two driven wheels are installed at the bottom of the trolley body, and anti-tipping outriggers are installed on both sides of the trolley body.

[0011] Preferably, the cantilever lifting assembly is mounted on the surface of the trolley body via a mounting plate. The cantilever lifting assembly includes a column, a cantilever beam, and a lifting mechanism. The two ends of the cantilever beam are rotatably connected to the top of the column and the lifting mechanism via a first rotary joint and a second rotary joint, respectively. The flipping clamp is mounted on the end of the lifting mechanism.

[0012] Preferably, the lifting mechanism is a parallelogram structure driven by a main cylinder, and its end is provided with a clamp mounting flange for mounting the tilting clamp. When the main cylinder extends, the tilting clamp rises; when the main cylinder retracts, the tilting clamp lowers.

[0013] Preferably, the trolley body is equipped with a hydraulic lifting cylinder and a push-pull handle. Lifting the push-pull handle upwards can lift the trolley body relative to the steering wheel through the hydraulic lifting cylinder, thereby dragging it. Pressing the push-pull handle can release the hydraulic lifting cylinder and lower the trolley body relative to the steering wheel to keep it fixed.

[0014] Preferably, the anti-tipping outriggers are folded and stored at the bottom of the trolley body, and the height of the anti-tipping outriggers is adjustable. During operation, the anti-tipping outriggers can be unfolded so that their bottom ends support the ground.

[0015] Preferably, the flipping fixture includes a process connecting rod and connecting flanges and a fixture flipping mechanism disposed at both ends thereon. The connecting flanges can be connected to the end flanges of the cantilever lifting assembly. The end of the fixture flipping mechanism is provided with a fixture seat, and an end fixture is installed on the fixture seat. The end fixture is used to clamp the traction rod of the EMU bogie.

[0016] Preferably, the fixture flipping mechanism includes a flipping cylinder, a flipping cylinder mounting base, a flipping support rod, and a flipping shaft. The flipping shaft is fixed to the end of the process connecting rod, and the flipping support rod is rotatably connected to both ends of the flipping shaft. The flipping cylinder mounting base is disposed on the surface of the process connecting rod, and the flipping cylinder is disposed on the flipping cylinder mounting base for driving the flipping support rod to rotate relative to the flipping shaft, so that the fixture seat and the end fixture flip between the horizontal plane and the vertical plane.

[0017] Preferably, the clamp base includes a rotating shaft and a clamp mounting base plate. One end of the rotating shaft is connected to the bottom end of the flipping support rod. The rotating shaft can rotate freely, and the clamp mounting base plate can rotate integrally with the rotating shaft.

[0018] Preferably, the end clamp includes a clamping cylinder, a synchronizing rod, two sets of opposing clamping plates and clamping blocks. The clamping blocks are slidably connected to the clamp mounting base plate. The clamping blocks are located at the ends of the clamping plates and have arc-shaped grooves on their inner sides. When the clamping cylinder extends, it can push the synchronizing rod to rotate. The synchronizing rod rotates around the axis of the rotating shaft, thereby driving the clamping plates on both sides to move synchronously toward the center of the clamp mounting base plate, so that the two clamping blocks cooperate to clamp the traction rod workpiece.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model addresses the pain points of current traction rod stiffness testing by combining practical operational backgrounds. It enables the overall handling of the traction rod pallet via a mobile trolley, eliminating the need for other handling equipment and achieving a highly efficient on-site operation mode using a pneumatic robotic arm to assist manual labor.

[0021] 2. The mobile trolley enables the equipment to move and cross rails, allowing for movement of work sites during maintenance.

[0022] 3. Customized fixtures can be used to perform operations such as flipping, rotating, clamping, and releasing of workpieces in specific postures, meeting the requirements of experimental processes. The operation is easy and convenient, reducing the labor intensity of manual operations.

[0023] 4. With the assistance of pneumatic control components, it can achieve assisted handling of workpieces of different weights. The operation is simple and does not require changing tooling or fixtures. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a front view of the overall structure of the robotic arm of this utility model;

[0026] Figure 2 This is a side view of the overall structure of the robotic arm of this utility model;

[0027] Figure 3 This is a top view of the mobile trolley in this utility model.

[0028] Figure 4 This is a schematic diagram of the cantilever lifting assembly in this utility model;

[0029] Figure 5 This is a schematic diagram of the flipping fixture in this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the pneumatic control button box in this utility model;

[0031] Figure 7 This is a schematic diagram of the internal structure of the pneumatic control box in this utility model;

[0032] Figure 8 This is a schematic diagram of the pneumatic control principle of the pneumatic control component in this utility model;

[0033] Explanation of reference numerals in the attached figures:

[0034] 1: Mobile trolley; 11: Trolley body; 12: Steering wheel; 13: Driven wheel; 14: Anti-tipping outrigger; 2: Cantilever lifting assembly; 21: Column; 22: Mounting plate; 23: Cantilever beam; 231: First rotary joint; 232: Second rotary joint; 24: Lifting mechanism; 241: Main cylinder; 242: Fixture mounting flange; 3: Pneumatic control assembly; 31: Pneumatic control box; 32: Pneumatic control button box; 4: Tilting fixture ; 41: Connecting flange; 42: Process connecting rod; 43: Fixture flipping mechanism; 431: Flipping cylinder; 432: Flipping cylinder mounting base; 433: Flipping support rod; 434: Flipping shaft; 44: Fixture seat; 441: Rotating shaft; 442: Fixture mounting base plate; 45: End fixture; 451: Clamping cylinder; 452: Synchronous connecting rod; 453: Clamping plate; 454: Clamping block; 5: Hydraulic lifting cylinder; 6: Push-pull handle. Detailed Implementation

[0035] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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.

[0037] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] like Figure 1-5 As shown, this utility model provides a load switching assist robotic arm suitable for EMU traction rod testing, comprising: a mobile trolley 1, a cantilever lifting assembly 2 mounted on the surface of the mobile trolley 1, a pneumatic control assembly 3 mounted on the cantilever lifting assembly 2, the pneumatic control assembly 3 including a pneumatic control box 31, a pneumatic control button box 32 and its auxiliary pneumatic control components, and a flipping clamp 4 mounted at the end of the cantilever lifting assembly 2. The pneumatic control assembly 3 is used to control the movement of the flipping clamp 4, thereby realizing the picking and placing of the EMU traction rod.

[0039] like Figure 3As shown, specifically, the mobile trolley 1 includes a trolley body 11. At least one steering wheel 12 and two driven wheels 13 are mounted on the bottom of the trolley body 11. Anti-tipping outriggers 14 are mounted on both sides of the trolley body 11. The trolley body 11 has a flat plate structure, and other components can be mounted on its surface. The steering wheel 12 is a rotating wheel, adopting a structure similar to that of a forklift. The trolley body 11 is equipped with a hydraulic lifting cylinder 5 and a push-pull handle 6. Lifting the push-pull handle 6 upwards can lift the trolley body 11 relative to the steering wheel 12 via the hydraulic lifting cylinder 5, thereby dragging the mobile trolley 1 and other components mounted on its surface. Pressing the push-pull handle 6 releases the hydraulic lifting cylinder 5, lowering the trolley body 11 relative to the steering wheel 12 and keeping it stationary. The driven wheels 13 are large-diameter load-bearing wheels with external guard plates, providing protection during operation and movement. Two anti-tipping outriggers 14 are installed on each side of the trolley body 11. The anti-tipping outriggers 14 are folded and stored at the bottom of the trolley body 11, and their height is adjustable. During operation, the anti-tipping outriggers 14 can be deployed to support the ground, effectively preventing the risk of tipping over when the cantilever lifting assembly 2 is extended and under end load.

[0040] like Figure 1 , 4 As shown, the cantilever lifting assembly 2 is mounted on the surface of the trolley body via a mounting plate 22. The cantilever lifting assembly 2 also includes a column 21, a cantilever beam 23, and a lifting mechanism 24. The column 21 is arranged vertically, and the mounting plate 22 is fixed to the bottom end of the column 21. The cantilever beam 23 is arranged horizontally, and its two ends are rotatably connected to the top end of the column 21 and the lifting mechanism 24 via a first rotary joint 231 and a second rotary joint 232, respectively. A flipping clamp 4 is installed at the end of the lifting mechanism 24. Through the cooperation of the first rotary joint 231, the second rotary joint 232, the cantilever beam 23, and the lifting mechanism 24, the load gripping radius provided by this embodiment is approximately 2200 mm.

[0041] In this embodiment, the lifting mechanism 24 is a parallelogram structure driven by a main cylinder 241. Its end is provided with a clamp mounting flange 242 for mounting the tilting clamp 4. The clamp mounting flange 242 is always kept in a horizontal plane. The main cylinder 241 can drive the parallelogram structure to deform, thereby changing the height of the clamp mounting flange 242 located at its diagonal point, and consequently changing the height of the tilting clamp 4. When the main cylinder 241 extends, the tilting clamp 4 rises; similarly, when the main cylinder retracts, the tilting clamp 4 lowers.

[0042] like Figure 5As shown, the flipping fixture 4 includes a process connecting rod 42 and connecting flanges 41 and fixture flipping mechanism 43 disposed at both ends thereon. The connecting flange 41 is connected to the fixture mounting flange 242 at the end of the cantilever lifting assembly 2. The end of the fixture flipping mechanism 4 is provided with a fixture seat 44, and an end fixture 45 is installed on the fixture seat 44. The end fixture 45 is used to clamp the traction rod of the EMU bogie, thereby cooperating with other components to transfer and place it.

[0043] The fixture flipping mechanism 43 includes a flipping cylinder 431, a flipping cylinder mounting base 432, a flipping support rod 433, and a flipping shaft 434. The fixture flipping mechanism 43 can flip under the action of the flipping cylinder 431. When the flipping cylinder 431 retracts, the end fixture 45 can remain in a vertical state; when the flipping cylinder 431 extends, the end fixture 45 can remain in a horizontal state. The flipping shaft 434 is fixed to the end of the process connecting rod 42. The flipping support rod 433 has a bent U-shaped structure, with its two sides rotatably connected to the two ends of the flipping shaft 434. The flipping cylinder mounting base 432 is disposed on the surface of the process connecting rod 42. The flipping cylinder 431 is disposed on the flipping cylinder mounting base 432 and is used to drive the flipping support rod 433 to rotate relative to the flipping shaft 434, causing the fixture base 44 and the end fixture 45 to flip between the horizontal and vertical planes.

[0044] The fixture base 44 includes a rotating shaft 441 and a fixture mounting base 442. The top end of the rotating shaft 441 is connected to the bottom end of the flipping support rod 433, allowing it to flip. The rotating shaft 441 can rotate freely or be manually operated, thereby enabling the workpiece to rotate. The fixture mounting base 442 is mounted on the bottom end of the rotating shaft 441 and can rotate integrally with the rotating shaft 441. The end clamp 45 includes a clamping cylinder 451, a synchronizing rod 452, two sets of opposing clamping plates 453 and clamping blocks 454. The clamping blocks 453 are slidably connected to the clamping mounting base plate 442. The clamping blocks 454 are located at the end of the clamping plates and have arc-shaped grooves on their inner sides that are adapted to the shape of the traction rod of the EMU bogie. When the clamping cylinder 451 extends, it can push the synchronizing rod 452 to rotate. The synchronizing rod 452 rotates around the axis of the rotating shaft 441, thereby driving the clamping plates 453 on both sides to move synchronously toward the center of the clamping mounting base plate 442, so that the arc-shaped grooves on the inner sides of the two clamping blocks 454 cooperate to clamp the traction rod workpiece.

[0045] The load switching function of the equipment is realized by the pneumatic components of the pneumatic control button box 32 and the pneumatic control housing 31. The pneumatic control housing 31 is located on the side of the column 21, and the pneumatic control button box 32 is located on the side of the process connecting rod 42 of the flipping fixture 4. The pneumatic control button box 32 and the pneumatic control housing 31 are as follows... Figure 6 and Figure 7 As shown, the pneumatic control principle diagram is as follows: Figure 8As shown. In the pneumatic control circuit, a precision pressure reducing valve and multiple precision pressure regulating valves are installed to provide different load-bearing capacities for the pneumatic main cylinder. Multiple gate valves and shuttle valves form an AND / OR / NOT logic control unit, enabling manual switching of the load. Series buttons (clamping and release buttons) are installed within the pneumatic control button box 32. Operators must hold the handles on both sides of the pneumatic control button box 32 with both hands to operate the equipment, effectively preventing injury from equipment movements.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A load-switching assisted robotic arm suitable for traction rod testing of high-speed trains, characterized in that, include: A mobile trolley is equipped with a cantilever lifting assembly on its surface. A pneumatic control assembly is installed on the cantilever lifting assembly. The pneumatic control assembly includes a pneumatic control box and a pneumatic control button box. A flipping clamp is installed at the end of the cantilever lifting assembly. The pneumatic control assembly is used to control the movement of the flipping clamp to realize the picking and placing of the EMU traction rod.

2. The load switching assistive robotic arm for EMU traction rod testing according to claim 1, characterized in that, The mobile trolley includes a trolley body, at least one steering wheel and two driven wheels are installed at the bottom of the trolley body, and anti-tipping outriggers are installed on both sides of the trolley body.

3. The load switching assistive robotic arm for EMU traction rod testing according to claim 2, characterized in that, The cantilever lifting assembly is mounted on the surface of the trolley body via a mounting plate. The cantilever lifting assembly includes a column, a cantilever beam, and a lifting mechanism. The two ends of the cantilever beam are rotatably connected to the top of the column and the lifting mechanism via a first rotary joint and a second rotary joint, respectively. The flipping clamp is mounted on the end of the lifting mechanism.

4. The load switching assistive robotic arm for EMU traction rod testing according to claim 3, characterized in that, The lifting mechanism is a parallelogram structure driven by a main cylinder, and its end is provided with a clamp mounting flange for mounting the tilting clamp. When the main cylinder extends, the tilting clamp rises; when the main cylinder retracts, the tilting clamp lowers.

5. The load switching assistive robotic arm for EMU traction rod testing according to claim 2, characterized in that, The trolley body is equipped with a hydraulic lifting cylinder and a push-pull handle. Lifting the push-pull handle upwards can lift the trolley body relative to the steering wheel through the hydraulic lifting cylinder, thereby dragging it. Pressing the push-pull handle can release the hydraulic lifting cylinder, lowering the trolley body relative to the steering wheel and keeping it fixed.

6. The load switching assistive robotic arm for EMU traction rod testing according to claim 2, characterized in that, The anti-tipping outriggers are folded and stored at the bottom of the trolley body, and the height of the anti-tipping outriggers is adjustable. During operation, the anti-tipping outriggers can be unfolded so that their bottom ends support the ground.

7. The load switching assistive robotic arm for EMU traction rod testing according to claim 1, characterized in that, The flipping fixture includes a process connecting rod and connecting flanges and a fixture flipping mechanism at both ends. The connecting flanges can be connected to the end flanges of the cantilever lifting assembly. The end of the fixture flipping mechanism is provided with a fixture seat, and an end fixture is installed on the fixture seat. The end fixture is used to clamp the traction rod of the EMU bogie.

8. The load switching assistive robotic arm for EMU traction rod testing according to claim 7, characterized in that, The fixture flipping mechanism includes a flipping cylinder, a flipping cylinder mounting base, a flipping support rod, and a flipping shaft. The flipping shaft is fixed to the end of the process connecting rod. The flipping support rod is rotatably connected to both ends of the flipping shaft. The flipping cylinder mounting base is disposed on the surface of the process connecting rod. The flipping cylinder is disposed on the flipping cylinder mounting base and is used to drive the flipping support rod to rotate relative to the flipping shaft, so that the fixture seat and the end fixture flip between the horizontal plane and the vertical plane.

9. The load switching assistive robotic arm for EMU traction rod testing according to claim 8, characterized in that, The clamp base includes a rotating shaft and a clamp mounting base plate. One end of the rotating shaft is connected to the bottom end of the flipping support rod. The rotating shaft can rotate freely, and the clamp mounting base plate can rotate as a whole with the rotating shaft.

10. The load switching assistive robotic arm for EMU traction rod testing according to claim 9, characterized in that, The end clamp includes a clamping cylinder, a synchronizing rod, two sets of opposing clamping plates and clamping blocks. The clamping blocks are slidably connected to the clamp mounting base plate. The clamping blocks are located at the ends of the clamping plates and have arc-shaped grooves on their inner sides. When the clamping cylinder extends, it can push the synchronizing rod to rotate. The synchronizing rod rotates around the axis of the rotating shaft, thereby driving the clamping plates on both sides to move synchronously towards the center of the clamp mounting base plate, so that the two clamping blocks cooperate to clamp the traction rod workpiece.

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