Device and method for testing hardness of automobile spherical hinge control arm

Abstract

The invention belongs to the technical field of automobile spherical hinge control arms, and particularly relates to an automobile spherical hinge control arm hardness testing device and method.The automobile spherical hinge control arm hardness testing device is characterized in that a lifting device is fixedly connected to the interior of a case, a workbench is fixedly connected to the top of the lifting device, and an automobile spherical hinge control arm body is placed on the top of the workbench; a clamping assembly is arranged between the top of the workbench and the interior of the sliding groove, pressure assemblies are movably connected between the two ends of the clamping assembly and the top of the workbench, and the automobile spherical hinge control arm body is located between the two pressure assemblies and the interior of the clamping assembly. A device needing hardness testing is fixed to the top of the workbench through the clamping assembly, the pressure assembly is driven to expand, and the clamping assembly is assisted to stably clamp parts such as an automobile spherical hinge control arm body which are irregular in shape and diverse in size; meanwhile, clamping force is continuously applied through the clamping assembly, and the pressure assembly is driven to test the inner angle expansion hardness of the automobile spherical hinge control arm body.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile ball joint control arms, and in particular relates to a hardness testing device and method for an automobile ball joint control arm. Background Art

[0002] In automobile manufacturing, the ball joint control arm is an important component, and its quality is related to automobile performance, safety and reliability. Material hardness is a key indicator to measure the quality of the ball joint control arm, which affects the strength, wear resistance and service life of the control arm. In order to ensure that the material hardness of the ball joint control arm meets the design requirements, a special test device is required. Currently, the common automotive ball joint control arm hardness test devices are mainly of three types: desktop, portable and automated.

[0003] The desktop device has supporting structures such as a base and columns. The test probe is connected through a transmission device and is equipped with a control system, display interface and fixed fixture. However, there are problems such as insufficient versatility of the fixture, limited probe movement, large overall size and lack of integration, and single loading force. Portable devices are similar to handheld tools, with a handle, a retractable rotating probe, a display screen and operation buttons, and are battery-powered. The automated device consists of a cabinet frame, a test platform, a conveying system, a multi-axis motion system and an intelligent control system, which can accurately test and connect to the quality management system. These devices have their own characteristics and limitations to varying degrees. In practical applications, they need to be selected and improved according to specific needs to better meet the requirements of automotive ball joint control arm hardness testing.

[0004] At present, among the existing automotive ball joint control arm hardness test devices, when the bench-type hardness test device is used to test the automotive ball joint control arm, since the fixing fixture of the bench-type hardness test device is usually designed according to standard dimensions, it is difficult to fully adapt to the automotive ball joint control arm, which has irregular shapes and various sizes. When the size of the control arm exceeds the adjustment range of the fixture, or the special shape cannot be effectively fixed, it will affect the accuracy and repeatability of the test.

[0005] In view of this, we propose a device and method for testing the hardness of an automobile ball joint control arm. Summary of the invention

[0006] The purpose of the present invention is to provide a device and method for testing the hardness of a ball joint control arm of an automobile, which can solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, one of the objects of the present invention is to provide a vehicle ball joint control arm hardness testing device, comprising a chassis, a lifting device is fixedly connected inside the chassis, a workbench is fixedly connected to the top of the lifting device, and a vehicle ball joint control arm body is placed on the top of the workbench; A slide groove is provided at the center of the upper surface of the workbench, a clamping assembly is movably connected inside the slide groove, and pressure assemblies are movably connected at both ends of the clamping assembly located on the upper surface of the workbench, and the automobile ball joint control arm body is located between the two pressure assemblies and the inside of the clamping assembly; The clamping assembly is used to fix the center of the body of the automobile ball joint control arm, and the clamping assembly continuously clamps and moves to test the hardness of the center of the body of the automobile ball joint control arm; while the clamping assembly moves, it also drives the pressure assembly to expand, and the pressure assembly is used to improve the stability of clamping the irregular parts of the body of the automobile ball joint control arm, and at the same time, the expansion hardness of the inner corner of the body of the automobile ball joint control arm is tested under the effect of the continuous movement of the pressure assembly; The pressure assembly also pushes the broken debris of the automobile ball joint control arm body that cannot withstand the hardness test, and the continuous movement of the clamping assembly and the pressure assembly is used to clean the debris on the top of the workbench.

[0008] The clamping assembly includes a fixed block, which is fixedly connected to the top of the workbench near the center of the three grooves. A screw is movably connected inside the sliding groove in the center of the workbench. A sliding block is threadedly connected to the outer wall of the screw, and a clamping block is fixedly connected to the top of the sliding block.

[0009] The pressure assembly comprises an expansion plate, one end of the expansion plate close to the clamping block is fixedly connected to a rotating block, a rotating rod is fixedly connected inside the rotating block, and a rotating member is provided between the rotating rod and the slider.

[0010] The rotating member comprises two toothed discs, which are meshed with each other, wherein one of the toothed discs is coaxially connected to the rotating rod, and a gear is coaxially connected to the bottom of the other toothed disc.

[0011] The outer walls on both sides of the slider are provided with grooves, gears are provided inside the slider grooves, racks are provided on both sides inside the slide groove of the workbench, the racks are slidably connected with the grooves, and the racks are meshed with the gears.

[0012] The sides of the fixed block and the clamping block close to each other and the sides of the two expansion plates close to the fixed block are both provided with rubber pads, and the rubber pads are used to reduce the wear on the body of the automobile ball joint control arm.

[0013] One end of the workbench is movably connected to a collection box, and the top of the collection box near one end is fixedly connected to two hooks, the hooks are plugged into the inside of the workbench, and a slope is fixedly connected to the inside of the workbench.

[0014] A second object of the present invention is to provide a method for operating the vehicle ball joint control arm hardness testing device as described in any one of the above, comprising the following method steps: S1. First, place the body of the automobile ball joint control arm on the top of the workbench, inside the clamping assembly, start the motor to drive the clamping assembly to rotate, and fix the body of the automobile ball joint control arm on the top of the workbench; S2. By clamping and moving the clamping assembly, the pressure assembly is driven to rotate to clamp and fix the inner corner of the vehicle ball joint control arm body, thereby improving the stability of the vehicle ball joint control arm body before the hardness test; S3. When the clamping assembly is continuously moved, the overall hardness of the vehicle ball joint control arm body is pressure tested, and at the same time, the pressure assembly is driven to test the inner angle expansion hardness of the vehicle ball joint control arm body, and the sensor is used to calculate the time the vehicle ball joint control arm body is subjected to the extrusion pressure before it is broken, thereby obtaining the test data of the hardness of the vehicle ball joint control arm body; S4. The clamping component is continuously moved to drive the pressure component to push the broken car ball joint control arm body debris on the top of the workbench, push the debris into the inside of the workbench and flow along the slope to the inside of the collection box, so as to keep the top of the workbench clean.

[0015] The technical effects achieved by the present invention are: The present invention fixes the component to be tested for hardness on the top of the workbench through the clamping assembly, and while the clamping assembly is fixing the device, it drives the pressure assembly to expand, thereby assisting the clamping assembly to firmly clamp the component with irregular shape and various sizes such as the body of the automobile ball joint control arm; At the same time, as the clamping force of the clamping assembly gradually increases, the pressure assembly will also expand the inner angle of the vehicle ball joint control arm body accordingly; in this process, the inner angle expansion hardness of the control arm body can be tested; by accurately monitoring the changes in the clamping force and the degree of expansion of the pressure assembly, hardness information about the vehicle ball joint control arm body can be obtained.

[0016] When the automobile ball joint control arm body is unfortunately broken during the hardness test due to being unable to withstand the applied pressure, the generated debris will be scattered on the top of the workbench; the clamping component is continuously moved to drive the pressure component to clean the debris on the top of the workbench; the neat appearance of the workbench is maintained, ensuring that subsequent testing work can be carried out smoothly in a clean and orderly environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the workbench in the present invention; Figure 3 It is a schematic diagram of the structure of the clamping state in the present invention; Figure 4 It is a schematic diagram of the structure in the closed state of the present invention; Figure 5 It is a structural schematic diagram of the bidirectional test in the present invention; Figure 6 It is a structural schematic diagram of the clamping assembly in the present invention; Figure 7 It is a schematic diagram of the structure of the pressure assembly in the present invention; Figure 8 It is a structural schematic diagram of the rotating part in the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Chassis; 11. Lifting device; 12. Workbench; 13. Collection box; 130. Hook; 131. Ramp; 14. Clamping assembly; 140. Fixed block; 141. Screw; 142. Slider; 143. Clamping block; 15. Pressure assembly; 150. Expander plate; 151. Rotating block; 152. Rotating rod; 153. Rotating part; 1530. Toothed plate; 1531. Gear; 1532. Rack; 16. Rubber pad; 2. Automobile ball joint control arm body. DETAILED DESCRIPTION

[0019] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0020] like Figure 1-Figure 6 As shown, a vehicle ball joint control arm hardness testing device comprises a chassis 1, a lifting device 11 is fixedly connected inside the chassis 1, a workbench 12 is fixedly connected to the top of the lifting device 11, and a vehicle ball joint control arm body 2 is placed on the top of the workbench 12; A slide groove is provided at the center of the upper surface of the workbench 12, and a clamping assembly 14 is movably connected inside the slide groove. Both ends of the clamping assembly 14 are located on the upper surface of the workbench 12 and are movably connected to pressure assemblies 15. The automobile ball joint control arm body 2 is located between the two pressure assemblies 15 and the inside of the clamping assembly 14. The clamping assembly 14 is used to fix the center of the automobile ball joint control arm body 2. The clamping assembly 14 continuously clamps and moves to test the hardness of the center of the automobile ball joint control arm body 2. The clamping assembly 14 also drives the pressure assembly 15 to expand while moving. The pressure assembly 15 is used to improve the stability of clamping the irregular parts of the automobile ball joint control arm body 2. At the same time, the expansion hardness of the inner corner of the automobile ball joint control arm body 2 is tested under the effect of the continuous movement of the pressure assembly 15. The pressure assembly 15 also pushes the broken debris of the automobile ball joint control arm body 2 that cannot withstand the hardness test, and the continuous movement of the clamping assembly 14 and the pressure assembly 15 is used to clean the debris on the top of the workbench 12.

[0021] The improvement of this embodiment is that: the component to be tested for hardness is fixed on the top of the workbench 12 by the clamping assembly 14, and the clamping assembly 14 also drives the pressure assembly 15 to expand, and the auxiliary clamping assembly 14 maintains the stability of the clamping of the automotive ball joint control arm body 2 with irregular shapes and various sizes; ensure that during the test process, the control arm body is always in a stable clamping state, and will not be loosened or shifted due to irregular shapes or diverse sizes; At the same time, the clamping component 14 continuously applies clamping force to drive the pressure component 15 to expand the inner angle of the vehicle ball joint control arm body 2, thereby testing the inner angle expansion hardness; the sensor accurately monitors the change of the clamping force and the expansion degree of the pressure component 15 to obtain detailed information on the hardness of the vehicle ball joint control arm body 2; When the automobile ball joint control arm body 2 is broken during the test because it cannot withstand the pressure, the clamping assembly 14 continues to move and drives the pressure assembly 15 to move; the pressure assembly 15 cleans the debris on the top of the workbench 12, effectively keeping the workbench 12 clean, and providing a clean and orderly environment for subsequent testing work.

[0022] The working principle of the sensor is known to those skilled in the art. The clamping force change is monitored by a strain gauge or pressure sensor, which is usually installed at the contact point between the clamp and the control arm or at a key force-bearing point. When the clamping force acts on the control arm, the sensitive element inside the sensor is deformed by force, such as the resistance change of the strain gauge, and then the mechanical change is converted into an electrical signal, which is transmitted to the data acquisition system through a wire, and then transmitted to the control system or computer after processing. Through algorithm and software analysis, the clamping force value and change curve are displayed in real time to judge the clamping stability, and an alarm will be issued if it exceeds the set range. For monitoring the degree of pressure expansion, a displacement sensor is usually used, such as a linear displacement sensor or a grating ruler installed on the pressure component 15. Based on electromagnetic induction, capacitance change, resistance change or optical principles, the displacement of the pressure component 15 is measured to reflect the degree of expansion. The data is transmitted to the control system, and the expansion force can be adjusted in real time. The operator can also understand the changes through the display screen, providing important parameter basis for hardness testing and ensuring the reliability and accuracy of the test.

[0023] First, the specific structure of the clamping assembly 14 is disclosed. The clamping assembly 14 includes a fixed block 140, which is fixedly connected to the top of the workbench 12 near the center of the three grooves. A screw 141 is movably connected inside the slide groove at the center of the workbench 12. A slider 142 is threadedly connected to the outer wall of the screw 141. A clamping block 143 is fixedly connected to the top of the slider 142. Refer to the attached Figure 3 , Attachment Figure 4 With attached Figure 5 As shown, the motor output shaft drives the screw 141 to rotate, and the screw 141 drives the slider 142 to move on the outer wall of the screw 141, so that the slider 142 drives the clamping block 143 to move, and the component is fixed on the top of the workbench 12 by the clamping block 143, located between the clamping block 143 and the fixed block 140.

[0024] Furthermore, the specific structure of the pressure assembly 15 is disclosed. The pressure assembly 15 includes an expansion plate 150. The expansion plate 150 has a rotating block 151 fixedly connected to one end close to the clamping block 143. The rotating block 151 has a rotating rod 152 fixedly connected thereto. A rotating member 153 is provided between the rotating rod 152 and the slider 142.

[0025] See attached Figure 3 , Attachment Figure 4 With attached Figure 6 As shown, the slider 142 is moved to drive the rotating member 153 to rotate, the rotating member 153 drives the rotating rod 152 to rotate inside the clamping block 143, and the rotating rod 152 drives the rotating block 151 to rotate inside the clamping block 143, so that the rotating block 151 adjusts the expansion angle between the two expansion plates 150. By adjusting the angle between the two expansion plates 150, it is convenient to adapt to the inner corner of the automobile ball joint control arm body 2. Through the continuous expansion of the two expansion plates 150, it is supported at the inner corner of the automobile ball joint control arm body 2, and the clamping and fixing of the automobile ball joint control arm body 2 is stabilized for a second time, ensuring that during the test process, the automobile ball joint control arm body 2 is always in a stable clamping state, and will not be loosened or shifted due to irregular shapes or diverse sizes. Furthermore, after the automobile ball joint control arm body 2 is fixed on the workbench 12, the central hardness of the automobile ball joint control arm body 2 is tested by continuous clamping of the clamp block 143. Meanwhile, the movement of the clamp block 143 will drive the two expansion plates 150 to continue to expand, and the hardness tension of the inner corner of the automobile ball joint control arm body 2 is tested. By accurately monitoring the change of the clamping force and the expansion degree of the two expansion plates 150, the hardness information about the automobile ball joint control arm body 2 can be obtained, and the stress condition of the control arm in actual use can be simulated, so as to obtain a more accurate and reliable hardness test result. The rotating member 153 includes two toothed plates 1530, which are meshed with each other, one of which is coaxially connected to the rotating rod 152, and the other toothed plate 1530 is coaxially connected to a gear 1531 at the bottom; grooves are provided on the outer walls of both sides of the slider 142, and gears 1531 are provided inside the grooves of the slider 142; racks 1532 are provided on both sides of the slide groove of the workbench 12, the racks 1532 are slidably connected to the grooves, and the racks 1532 are meshed with the gears 1531.

[0026] See attached Figure 3 , Attachment Figure 4 With attached Figure 7 As shown, the position of the gear 1531 is adjusted by moving the slider 142, so that during the movement, the gear 1531 is subjected to the meshing force of the rack 1532, which drives the gear 1531 and its coaxially connected toothed disc 1530 to rotate, and the two toothed discs 1530 are meshed and rotated, so that the other toothed disc 1530 drives the rotating rod 152 to rotate, and the rotating block 151 is driven to rotate by the rotating rod 152, so that the two rotating blocks 151 adjust the expansion angle between the two expansion plates 150.

[0027] The side of the fixed block 140 and the clamping block 143 close to each other and the side of the two expansion plates 150 close to the fixed block 140 are both provided with rubber pads 16, and the rubber pads 16 are used to reduce the wear on the vehicle ball joint control arm body 2; Refer to the attached Figure 2 With attached Figure 5 As shown, the rubber pad 16 protects the contact parts between the clamp block 143, the fixed block 140 and the two expansion plates 150 and the automobile ball joint control arm body 2; according to the characteristics of the rubber material, it has excellent elasticity; when the clamp contacts the automobile ball joint control arm body 2, the rubber pad 16 can deform according to the shape and force of the automobile ball joint control arm body 2, so as to fit closely to the surface of the automobile ball joint control arm body 2; this fit can not only increase the contact area and make the clamping more stable, but also effectively disperse the clamping force to avoid excessive local pressure causing damage to the surface of the automobile ball joint control arm body 2; Secondly, rubber has good wear resistance. During multiple clamping and loosening operations, friction will be generated between the clamp and the automobile ball joint control arm body 2. Without the protection of the rubber pad 16, the surface of the automobile ball joint control arm body 2 will be easily worn. The rubber material can withstand this friction and reduce the degree of wear on the surface of the automobile ball joint control arm body 2. Even after long-term use, the rubber pad 16 can maintain good performance and continue to provide protection for the automobile ball joint control arm body 2.

[0028] Considering that when the automobile ball joint control arm body 2 is broken during the hardness test due to being unable to withstand the applied pressure, some of the automobile ball joint control arm body 2 will remain on the surface of the workbench 12, therefore, a collection box 13 is movably connected to one end of the workbench 12, and two hooks 130 are fixedly connected to the top of the collection box 13 near one end, and the hooks 130 are plugged into the inside of the workbench 12, and a slope 131 is fixedly connected to the inside of the workbench 12; Refer to the attached Figure 2As shown, the clamping block 143 is continuously moved, so that the two expansion plates 150 are continuously expanded and move on the top of the workbench 12, so that the expansion plates 150 push the debris on the top of the workbench 12 to the inside of the groove at the end of the workbench 12, so that after the debris enters the inside of the workbench 12, it slides along the inclined direction of the slope 131 to the inside of the collection box 13; wherein the hook 130 is moved up and down inside the workbench 12, so that the collection box 13 can be easily installed and disassembled.

[0029] This embodiment is based on the content provided in Embodiment 1, and aims to provide a method for testing the hardness of a ball joint control arm of an automobile, and the specific steps are as follows: S1. First, place the automobile ball joint control arm body 2 on the top of the workbench 12, that is, between the clamping block 143 and the fixed block 140; at this time, start the motor, the output shaft of the motor starts to rotate and drives the screw 141 to rotate synchronously; as the screw 141 rotates, the slider 142 starts to move smoothly on the outer wall of the screw 141 due to its threaded connection relationship with the screw 141; during the movement, the slider 142 drives the clamping block 143 to move together, and the clamping block 143 gradually approaches the automobile ball joint control arm body 2; when the clamping block 143 contacts the automobile ball joint control arm body 2, continue to apply pressure, and finally the automobile ball joint control arm body 2 is firmly fixed on the top of the workbench 12, and is located between the clamping block 143 and the fixed block 140, to ensure that the control arm will not move easily in subsequent operations; S2. Then, as the slider 142 moves, the gear 1531 is driven to move. Due to the meshing relationship between the gear 1531 and the rack 1532, the gear 1531 is subjected to the meshing force of the rack 1532 when moving. This meshing force causes the gear 1531 to rotate inside the groove of the slider 142. The rotation of the gear 1531 further drives one of the toothed discs 1530 to rotate. Since the two toothed discs 1530 mesh with each other, when one toothed disc 1530 rotates, the other toothed disc 1530 also rotates accordingly. In this way, the other toothed disc 1530 drives the rotating rod 152 to rotate, and the rotating rod 152 drives the rotating block 151 to rotate. Through the rotation of the rotating block 151, the expansion angle between the two expansion plates 150 is precisely adjusted. S3. After the angle adjustment, the two expansion plates 150 can better adapt to the inner corner of the automobile ball joint control arm body 2; as the operation continues, the two expansion plates 150 continue to expand and gradually support the inner corner of the automobile ball joint control arm body 2; this inner corner support method provides secondary stability for the clamping and fixing of the automobile ball joint control arm body 2; the shape of the automobile ball joint control arm body 2 is often irregular and the size is diverse. Through this secondary stable clamping, it can be ensured that during the test process, the automobile ball joint control arm body 2 is always in a stable state, and will not become loose or shifted due to its own irregular shape or diverse size, laying a solid foundation for subsequent accurate testing; S4. After the automobile ball joint control arm body 2 is firmly fixed on the workbench 12, the central hardness of the automobile ball joint control arm body 2 can be tested by continuous clamping of the clamping block 143; at the same time, the movement of the clamping block 143 will drive the two expansion plates 150 to continue to expand; during the expansion process, the two expansion plates 150 test the hardness tension of the inner corners of the automobile ball joint control arm body 2; in this process, by accurately monitoring the changes in the clamping force and the expansion degree of the two expansion plates 150, detailed hardness information about the automobile ball joint control arm body 2 can be obtained; this test method can more realistically simulate the stress conditions of the control arm during actual use, thereby obtaining more accurate and reliable hardness test results, providing a strong basis for the quality evaluation of the automobile ball joint control arm; S5. As the clamping block 143 continues to move, the two expansion plates 150 also continue to expand and move on the top of the workbench 12; during the movement, the expansion plates 150 can push the debris on the top of the workbench 12 to the inside of the groove at the end of the workbench 12; when the debris enters the inside of the workbench 12, it will naturally slide into the inside of the collection box 13 along the inclined direction of the slope 131; such operation can maintain the neat appearance of the workbench 12 and prevent the debris from interfering with subsequent testing work; ensure that subsequent testing work can be carried out smoothly in a clean and orderly environment, and improve the efficiency and accuracy of the testing work.

[0030] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A vehicle ball joint control arm hardness testing device, comprising a chassis (1), a lifting device (11) fixedly connected inside the chassis (1), a workbench (12) fixedly connected to the top of the lifting device (11), characterized in that: A vehicle ball joint control arm body (2) is placed on the top of the workbench (12); A slide groove is provided at the center of the upper surface of the workbench (12), a clamping assembly (14) is movably connected inside the slide groove, and pressure assemblies (15) are movably connected to both ends of the clamping assembly (14) located on the upper surface of the workbench (12), and the automobile ball joint control arm body (2) is located between the two pressure assemblies (15) and the inside of the clamping assembly (14); The clamping assembly (14) is used to fix the center of the automobile ball joint control arm body (2); the clamping assembly (14) continuously clamps and moves to test the hardness of the center of the automobile ball joint control arm body (2); while the clamping assembly (14) moves, it also drives the pressure assembly (15) to perform expansion movement; the pressure assembly (15) is used to improve the stability of clamping the irregular parts of the automobile ball joint control arm body (2); and at the same time, under the effect of the continuous movement of the pressure assembly (15), the expansion hardness of the inner corner of the automobile ball joint control arm body (2) is tested; The pressure component (15) also pushes broken debris of the automobile ball joint control arm body (2) that cannot withstand the hardness test, and the continuous movement of the clamping component (14) and the pressure component (15) is used to clean the debris on the top of the workbench (12).

2. The vehicle ball joint control arm hardness testing device according to claim 1, characterized in that: The clamping assembly (14) comprises a fixed block (140), the fixed block (140) being fixedly connected to the top of the workbench (12) near the centers of the three grooves, a screw rod (141) being movably connected inside the slide groove at the center of the workbench (12), a sliding block (142) being threadedly connected to the outer wall of the screw rod (141), and a clamping block (143) being fixedly connected to the top of the sliding block (142).

3. The vehicle ball joint control arm hardness testing device according to claim 1, characterized in that: The pressure assembly (15) comprises an expansion plate (150), one end of the expansion plate (150) close to the clamping block (143) is fixedly connected to a rotating block (151), a rotating rod (152) is fixedly connected inside the rotating block (151), and a rotating member (153) is provided between the rotating rod (152) and the slider (142).

4. The vehicle ball joint control arm hardness testing device according to claim 1, characterized in that: The rotating member (153) comprises two toothed discs (1530), the two toothed discs (1530) being meshed and connected to each other, wherein one of the toothed discs (1530) is coaxially connected to the rotating rod (152), and the bottom of the other toothed disc (1530) is coaxially connected to a gear (1531).

5. The vehicle ball joint control arm hardness testing device according to claim 1, characterized in that: The outer walls of both sides of the slider (142) are provided with grooves, and gears (1531) are provided inside the grooves of the slider (142). Racks (1532) are provided on both sides of the slide groove of the workbench (12), and the racks (1532) are slidably connected to the grooves, and the racks (1532) are meshingly connected to the gears (1531).

6. The vehicle ball joint control arm hardness testing device according to claim 1, characterized in that: A rubber pad (16) is provided on one side of the fixed block (140) and the clamping block (143) close to each other and on one side of the two expansion plates (150) close to the fixed block (140). The rubber pad (16) is used to reduce wear on the vehicle ball joint control arm body (2).

7. The vehicle ball joint control arm hardness testing device according to claim 1, characterized in that: One end of the workbench (12) is movably connected to a collection box (13), and the top of the collection box (13) is fixedly connected to two hooks (130) near one end thereof, the hooks (130) are plugged into and matched with the inside of the workbench (12), and the inside of the workbench (12) is fixedly connected to a slope (131).

8. A method for operating the vehicle ball joint control arm hardness testing device according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1. First, place the automobile ball joint control arm body (2) on the top of the workbench (12), located inside the clamping assembly (14), start the motor to drive the clamping assembly (14) to rotate, and fix the automobile ball joint control arm body (2) on the top of the workbench (12); S2, by clamping and moving the clamping assembly (14), the pressure assembly (15) is driven to rotate to clamp and fix the inner corner of the vehicle ball joint control arm body (2), thereby improving the stability of the vehicle ball joint control arm body (2) before the hardness test; S3, when the clamping assembly (14) continues to move, the overall hardness of the automobile ball joint control arm body (2) is pressure tested, and at the same time, the pressure assembly (15) is driven to test the internal angle expansion hardness of the automobile ball joint control arm body (2), and the sensor is used to calculate the time the automobile ball joint control arm body (2) is subjected to the extrusion pressure before it is broken, thereby obtaining test data of the hardness of the automobile ball joint control arm body (2); S4. The clamping assembly (14) is continuously moved to drive the pressure assembly (15) to push the broken automobile ball joint control arm body (2) debris on the top of the workbench (12), and push the debris into the inside of the workbench (12) and flow along the slope (131) to the inside of the collection box (13), so as to keep the top of the workbench (12) clean.

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