A testing device and method for automobile ball stud

Abstract

The present application discloses a testing device for a ball stud of an automobile, including a workbench, a ball stud seat and a guide frame, wherein the ball stud seat is mounted on the top of the workbench, a ball stud to be tested is arranged in the ball stud seat, and the guide frame is mounted on the top of the workbench, and a guide groove matching with the ball rod of the ball stud is arranged in the guide frame, wherein the guide groove is suitable for making the ball rod swing in a set plane, and the set plane is perpendicular to the workbench; a testing method for a ball stud of an automobile is also disclosed. The beneficial effects of the present application are as follows: by providing a guide frame, under the limiting action of the guide groove in the guide frame, the ball rod of the ball stud can swing in a set swing plane, thereby making the ball stud not deviate when performing a swing angle test, thereby ensuring the stability of the ball stud when performing a maximum swing angle test, thereby effectively reducing the test error and improving the reliability of the test result.

Description

Technical Field

[0001] The present application relates to the technical field of testing devices, and in particular to a testing device and method for a ball stud of an automobile. Background Art

[0002] Ball pins are widely used in independent suspension systems. Control arms or thrust rods are often connected to other components through ball pins at the ends. The main function of the ball pins is to enable the wheels to bounce up and down and turn.

[0003] The performance of the ball stud not only affects the life of the car's steering components, but also affects driving safety and comfort. Therefore, during the production process of the ball stud, it is necessary to test it to monitor the fluctuations in the manufacturing process and avoid causing large quantities of unqualified products; Figure 1 As shown in the figure, the maximum swing angle (θ) of the ball head, the radial stiffness and the axial stiffness of the ball head are the key technical parameters of the ball head assembly. However, in the existing maximum swing angle test of the ball head, due to the arbitrary rotation of the ball stud, the ball stud is easy to deviate during the test, and the swing angle error measured is large, which affects the experimental results. Therefore, a test device and method for an automobile ball stud are proposed to solve the above technical problems. Summary of the invention

[0004] One of the purposes of the present application is to provide a testing device for a ball stud of an automobile.

[0005] Another object of the present application is to provide a method for testing a ball stud of an automobile.

[0006] To achieve the above objectives, the technical solution adopted in the present application is: a testing device for a car ball stud, comprising a workbench, a ball stud seat and a guide frame, wherein the ball stud seat is installed on the top of the workbench, and a ball stud to be tested is arranged in the ball stud seat, and the guide frame is installed on the top of the workbench, and a guide groove matching the ball rod of the ball stud is arranged in the guide frame, and the guide groove is suitable for allowing the ball rod to swing in a set plane, and the set plane is perpendicular to the workbench.

[0007] Preferably, the first end of the guide frame is rotatably mounted on the workbench, and the second end of the guide frame is locked with the workbench.

[0008] Preferably, the guide frame is of a semicircular structure, with scale lines on the side of the guide frame, a coaxially arranged swing rod is sleeved on the outside of the ball club, the swing rod cooperates with the guide groove, a pair of baffles are elastically slidably installed in the guide groove, and a pointer cooperating with the scale lines is installed on the outside of the baffle; when performing a swing angle test, the swing rod is suitable for squeezing the baffle to slide along the guide groove, thereby causing the pointer and the scale lines to move relative to each other.

[0009] Preferably, a limit assembly and an unlocking device are provided on the guide frame, the limit assembly is movably arranged on the guide frame and cooperates with the baffle, and the unlocking device is installed on the guide frame and cooperates with the limit assembly; when performing a swing angle test, the limit assembly is suitable for being located in the first position under the action of the unlocking device, and then the baffle is suitable for hovering at any angle under the action of the limit assembly; after performing the swing angle test, the guide frame is suitable for rotating along the first end and driving the limit assembly to be located in the second position through the unlocking device, and then the baffle is suitable for moving and resetting under the action of elastic force.

[0010] Preferably, the limiting component is a magnetic strip, which is vertically slidably mounted on the guide frame and cooperates with the unlocking device; when the magnetic strip is in a first position, the magnetic strip is against the baffle, thereby locking the baffle under the action of magnetic attraction; when the magnetic strip is in a second position, the magnetic strip is away from the baffle and releases the lock on the baffle.

[0011] Preferably, the unlocking device includes a locking rod and a lock cylinder, the locking rod is vertically mounted on the top of the workbench, the first end of the guide frame is rotatably mounted on the locking rod, the lock cylinder is sleeved on the outside of the locking rod and connected to the magnetic strip, and the lock cylinder and the locking rod are matched through a guide structure; when the guide frame rotates, the locking rod is suitable for driving the lock cylinder to move up and down through the guide structure.

[0012] Preferably, the guide structure includes a guide block and a guide rail, the guide rail is a spiral structure and slidingly cooperates with the guide block; the guide block is installed inside the lock cylinder, and the guide rail is arranged outside the lock rod; or the guide block is installed outside the lock rod, and the guide rail is arranged inside the lock cylinder.

[0013] Preferably, a pressure device is installed above the workbench through a bracket, and the pressure device is located directly above the ball head seat. A positioning device for locking the ball head seat is provided at the top of the workbench; the upper end of the ball rod is suitable for connecting with the bottom end of the pressure device, and thus the pressure device is suitable for performing axial load testing on the ball head pin.

[0014] Preferably, the positioning device comprises a positioning frame, a first end of which is rotatably mounted on the workbench; when in use, the positioning frame is suitable for rotating and abutting against the top of the ball head seat, and the second end of the positioning frame is locked with the workbench.

[0015] A method for testing a car ball stud, using the above-mentioned car ball stud testing device, comprises the following steps: S100: installing the ball stud on the workbench through the ball stud seat, and then performing a maximum swing angle test on the ball stud through the guide frame; S200: connecting the upper end of the ball rod and the bottom end of the pressure device through a clamp one, and then performing an axial load test on the ball stud through the pressure device; S300: installing the upper end of the ball rod on the side of the bracket through the clamp one, and the ball stud is arranged horizontally, and then installing the ball stud seat at the lower end of the ball stud on the bottom end of the pressure device through a clamp two, and then performing a radial load test on the ball stud through the pressure device.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] The present invention is provided with a guide frame, and under the limiting action of the guide groove in the guide frame, the ball rod of the ball stud can swing within a set swing plane, so that the ball stud will not deviate during the swing angle test, thereby ensuring the stability of the ball stud during the maximum swing angle test, thereby effectively reducing the test error and improving the reliability of the test result. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of various performance testing methods for ball studs.

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the swing angle test of the ball stud of the present invention under the action of the guide frame.

[0021] Figure 4 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0022] Figure 5 It is a schematic diagram of the limiting assembly and the unlocking device of the present invention.

[0023] Figure 6 It is a schematic diagram of the guiding structure of the present invention.

[0024] Figure 7 It is a schematic diagram of the cooperation between the magnetic strip and the slider of the present invention.

[0025] Figure 8 It is a schematic diagram of the magnetic strip and the slider of the present invention being separated.

[0026] Fig. 9 It is a schematic diagram of the installation of the ball head seat and the positioning device of the present invention after installation.

[0027] Fig.10 This is a schematic diagram of the guide frame and the swing arm after installation of the present invention.

[0028] Fig.11 It is a schematic diagram of the axial load test of the ball head seat of the present invention.

[0029] Fig.12 It is a schematic diagram of a radial load test of the ball seat of the present invention.

[0030] Fig.13 It is a schematic diagram of the structure of clamp 1 and clamp 2 of the present invention.

[0031] In the figure: 1, ball pin; 101, ball rod; 102, sphere; 2, workbench; 3, bracket; 4, pressure device; 5, guide frame; 6, guide groove; 7, ball head seat; 8, positioning device; 801, positioning frame; 9, swing rod; 10, pointer; 11, scale line; 12, limit assembly; 1201, magnetic strip; 13, baffle; 1301, plate; 1302, slider; 14, spring; 15, unlocking device; 1501, locking rod; 1502, lock cylinder; 16, guide structure; 1601, guide block; 1602, guide rail; 17, clamp one; 18, clamp two; 1801, upper clamping plate; 1802, lower clamping plate. DETAILED DESCRIPTION

[0032] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0033] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0035] One of the preferred embodiments of the present application is as follows: Figures 1 to 13As shown, a testing device for a car ball stud comprises a workbench 2, a ball stud seat 7 and a guide frame 5. The ball stud seat 7 is mounted on the top of the workbench 2. Of course, a ball stud 1 to be tested is arranged in the ball stud seat 7. It should be known that the ball stud 1 comprises a connected sphere 102 and a ball rod 101; the guide frame 5 is mounted on the top of the workbench 2, and a guide groove 6 matching the ball rod 101 of the ball stud 1 is arranged in the guide frame 5.

[0036] It can be understood that, under the limiting effect of the guide groove 6, the ball rod 101 can only swing within this set (swing) plane, so the ball stud 1 will not be offset in other directions during the swing test, and this set plane is perpendicular to the workbench 2, that is, the swing plane of the ball stud 1 is perpendicular to the workbench 2, thereby ensuring the stability of the ball stud 1 during the maximum swing angle test, thereby effectively reducing the test error and improving the reliability of the test results.

[0037] Furthermore, since the ball stud 1 needs to undergo a subsequent axial stiffness test after the swing angle test, in order to facilitate the quick disassembly and assembly of the guide frame 5, the guide frame 5 can be installed in the following manner: Figure 3 As shown, the first end (left end) of the guide frame 5 is rotatably mounted on the workbench 2, and the second end (right end) of the guide frame 5 is locked with the workbench 2. Of course, the locking method can be an existing snap-fit ​​structure or a bolt fastening method.

[0038] It is understandable that, when disassembling, the right end of the guide frame 5 is loosened, and at this time, the guide frame 5 only needs to be rotated away from the ball head seat 7, such as Fig.11 As shown, the axial stiffness test of the ball stud 1 can then be carried out, which greatly improves the convenience and test efficiency.

[0039] We know that Figure 1 As shown, the size of the ball stud 1 itself is not very large, especially the length of the ball rod 101 is not very long, so the size of the guide frame 5 matched with it will be relatively small, and it is difficult to observe the swing angle when performing a swing angle test. At the same time, the installation of the ball head seat 7 and the guide frame 5 may also interfere.

[0040] Therefore, in order to solve the above technical problems, in one embodiment of the present application, Figure 3 and Figure 4 As shown, the guide frame 5 is a semicircular structure as a whole, and the side of the guide frame 5 has scale lines 11. The outside of the ball rod 101 is sleeved with a coaxially arranged swing rod 9, and the swing rod 9 cooperates with the guide groove 6. A pair of baffles 13 are elastically slidably installed in the semicircular guide groove 6 (through a spring 14), and a pointer 10 that cooperates with the scale line 11 is installed on the outside of the baffle 13.

[0041] It can be understood that since the swing rod 9 and the ball club 101 are coaxially arranged, the swing angle of the swing rod 9 is the swing angle of the ball club 101, which is equivalent to lengthening the length of the ball club 101. Therefore, the corresponding size of the guide frame 5 can be set larger, and it will not interfere with the installation of the ball head seat 7 while facilitating the observation of the swing angle.

[0042] Specifically, when conducting the maximum swing angle test of the ball stud 1, first fix the guide frame 5 at a suitable position on the workbench 2, then pass the swing rod 9 through the guide groove 6 and sleeve it on the ball rod 101, at which time the swing rod 9 will cooperate with the guide groove 6; the baffle 13 includes a plate body 1301 and a pair of sliders 1302, the sliders 1302 are fixedly connected to the two ends of the plate body 1301, and the sliders 1302 are respectively slidably arranged on both sides of the inside of the guide frame 5, and the plate body 1301 is located in the guide groove 6.

[0043] Before swinging, Figure 7 As shown, the two sliders 1302 will be at the highest point (i.e. the initial position of the sliders 1302) under the action of the spring 14, and the swing rod 9 is in a vertical state. When the swing rod 9 is swung and deflected, the swing rod 9 will squeeze the plate 1301, thereby causing the sliders 1302 to slide, that is, the entire baffle 13 will slide along the semicircular guide groove 6. At the same time, the pointer 10 installed on the side of the baffle 13 (i.e. the slider 1302) will slide accordingly. When the swing rod 9 rotates to the maximum angle, the maximum swing angle in this direction can be obtained by the pointer 10 pointing to the corresponding scale line 11. Figure 1 As shown, the limit position angle after the ball rod 101 swings left and right is the maximum swing angle of the ball stud 1. Of course, after the test, due to the action of the spring 14, the baffle 13 will be reset and rotated to the initial position under the action of the elastic force, so as to facilitate the swing angle test of the next ball stud 1 to be tested.

[0044] Based on the above embodiment, the following problem may occur when performing the maximum swing angle test: since the baffle 13 is elastically installed by the spring 14, it will reset when the swing rod 9 loses its force (i.e., human push), that is, the swing angle of the scale line 11 corresponding to the pointer 10 needs to be recorded, and then the data needs to be recorded once the pointer 10 swings, which makes the test process more cumbersome and laborious. At the same time, due to the reset of the pointer 10, it is not convenient to later calibrate the recorded data value with the actual value corresponding to the pointer 10, which increases the error of the experiment.

[0045] Therefore, in order to solve the above technical problems, in one embodiment of the present application, Figure 4 and Figure 5As shown, a limit assembly 12 and an unlocking device 15 are provided on the guide frame 5 . The limit assembly 12 is movably provided on the guide frame 5 and cooperates with the baffle 13 . The unlocking device 15 is installed on the guide frame 5 and cooperates with the limit assembly 12 .

[0046] It is understandable that when performing a swing angle test, Figure 7 As shown, the limit assembly 12 can be located at the first position under the action of the unlocking device 15, and then the baffle 13 can be suspended at any angle under the action of the limit assembly 12. After the swing angle test, that is, when the right end of the guide frame 5 is disassembled and rotated along the first end, as shown in FIG. Figure 8 As shown, at this time, the unlocking device 15 can drive the limiting assembly 12 to the second position under the action of the movement of the guide frame 5, that is, at this time, the limiting assembly 12 will release the locking or limiting action on the baffle 13, and then the baffle 13 can move and reset under the elastic force of the spring 14. Similarly, when the next swing angle test of the ball stud 1 is carried out, at this time, after the guide frame 5 is reversed and fixed by the right end, the unlocking device 15 can make the limiting assembly 12 in the first position under the movement of the guide frame 5, and then the baffle 13 can be limited.

[0047] Specifically, Figure 7 and Figure 8 As shown, the limiting component 12 is a magnetic strip 1201 , and the slider 1302 of the baffle 13 can be made of iron material, and the magnetic strip 1201 can be vertically slidably installed on the guide frame 5 and cooperate with the unlocking device 15 .

[0048] It is understandable that if Figure 7 As shown, when the magnetic strip 1201 is in the first position: at this time, the magnetic strip 1201 is close to or against the baffle 13 (i.e., the slider 1302), so that the slider 1302 is locked under the action of the magnetic attraction force, that is, at this time, the magnetic attraction force of the magnetic strip 1201 on the slider 1302 is greater than the elastic force of the spring 14. In other words, when performing the swing angle test, the slider 1302 will slide under the forced push of the external force; and when the slider 1302 stops moving, the slider 1302 will remain in this static state under the action of the magnetic strip 1201. In this way, when performing the swing angle test, the two pointers 10 can stop in the state after the maximum swing, which is convenient for the tester to observe and record in real time.

[0049] After the guide frame 5 is rotated and disassembled, Figure 8As shown, when the magnetic strip 1201 is in the second position: at this time, the magnetic strip 1201 moves up and creates a certain distance between it and the slider 1302. At this time, the magnetic strip 1201 will unlock the baffle 13 (i.e., the slider 1302), that is, the slider 1302 is not affected by the magnetic attraction of the magnetic strip 1201 or the magnetic attraction is very weak, so that the slider 1302 is unlocked, and then the slider 1302 can move to the initial position under the action of the spring 14.

[0050] The present application does not specifically limit the structure of the unlocking device 15, and a specific structure is described below: Figure 6 As shown, the unlocking device 15 includes a locking rod 1501 and a locking cylinder 1502, the locking rod 1501 is vertically mounted on the top of the workbench 2, the first end (left end) of the guide frame 5 is rotatably mounted on the locking rod 1501, the locking cylinder 1502 is sleeved on the outside of the locking rod 1501 and connected to the magnetic strip 1201, and the locking cylinder 1502 and the locking rod 1501 are matched through the guide structure 16. It can be understood that when the guide frame 5 rotates, the locking rod 1501 can drive the locking cylinder 1502 to move up and down through the guide structure 16, thereby realizing the change between the first position and the second position of the magnetic strip 1201.

[0051] As a further description of the above embodiment: Figure 6 As shown, the guide structure 16 includes a guide block 1601 and a guide rail 1602. The guide rail 1602 is a spiral structure and is slidably matched with the guide block 1601. Of course, there are two ways to install the guide block 1601 and the guide rail 1602: in the first way, the guide block 1601 is installed inside the lock cylinder 1502, and the guide rail 1602 is arranged outside the lock rod 1501. In the second way, the guide block 1601 is installed outside the lock rod 1501, and the guide rail 1602 is arranged inside the lock cylinder 1502.

[0052] In order to facilitate a clearer understanding of the mutual coordination relationship between the front and rear guide frames 5, the unlocking device 15 and the limit assembly 12 of the swing angle test, the working principle thereof is described below:

[0053] like Figure 3 As shown in FIG. 1 , it is also the initial state before the swing angle test. At this time, the two plates 1301 are both against the two sides of the swing rod 9 under the action of the spring 14. At this time, the swing rod 9 is located at the center of the guide groove 6, that is, the swing rod 9 is vertically set on the workbench 2. When the test is carried out, the swing rod 9 is rotated to the left, for example, and the swing rod 9 will act on the plate 1301 to move. Under the action of the guide groove 6, the ball stud 1 can only rotate within the set plane. When the ball stud 1 rotates to the left to the limit distance, the plate 1301 will also stop moving. Figure 7As shown, at this time, the slider 1302 on the plate 1301 will remain stationary under the magnetic attraction of the magnetic strip 1201, so the scale line 11 corresponding to the pointer 10 is the maximum angle of leftward swing, and the maximum angle of rightward swing is measured in the same way; finally, the maximum swing angle of the ball stud 1 can be calculated by observing the records. Figure 8 As shown, after measuring the swing angle, the right end of the guide frame 5 is loosened, and then the guide frame 5 is rotated 180 degrees around the locking rod 1501. The lock cylinder 1502 can be moved upward by a certain distance through the spiral cooperation of the guide block 1601 and the guide rail 1602, thereby causing the magnetic strip 1201 to move upward and away from the slider 1302. In this way, the slider 1302 will lose the magnetic limiting effect of the magnetic strip 1201, and then the entire baffle 13 will return to its initial state under the action of the spring 14, so as to facilitate the next swing angle test.

[0054] In one of the embodiments of the present application, Fig.11 As shown, a pressure device 4 is installed above the workbench 2 through a bracket 3, and the pressure device 4 is located directly above the ball head seat 7. A positioning device 8 for locking the ball head seat 7 is provided at the top of the workbench 2.

[0055] It can be understood that after the swing angle test, the right end of the guide frame 5 is loosened and rotated, and then the upper end of the ball rod 101 is connected to the bottom end of the pressure device 4. At this time, the axial load test of the ball stud 1 can be performed through the pressure device 4; of course, the pressure device 4 is also common knowledge known to those skilled in the art, so it will not be described here.

[0056] Specifically, Fig. 9 As shown, the positioning device 8 includes a positioning frame 801, and the first end (right end) of the positioning frame 801 is rotatably mounted on the workbench 2 via a horizontal rotating shaft. It is understandable that when in use, the positioning frame 801 is rotated and abutted against the top position of the ball head seat 7, and then the second end (left end) of the positioning frame 801 is locked with the workbench 2. The locking fit here is preferably in the form of bolts, that is, the left end of the positioning frame 801 and the workbench 2 are tightened by bolts, so that the stability of the ball head seat 7 during the axial load test can be ensured.

[0057] Another aspect of the present application provides a method for testing a ball stud of an automobile. Based on the above-mentioned testing device for the ball stud of an automobile, a method for testing the maximum swing angle (θ) of the ball stud, the axial stiffness of the ball stud, and the radial stiffness of the ball stud 1 can be measured separately in sequence using one testing device. The method comprises the following steps:

[0058] S100: Fig. 9 As shown in (a) in the figure, firstly, the ball head seat 7 is fixed on the workbench 2 by bolts. Fig. 9Then the positioning frame 801 is rotated and abutted against the top of the ball head seat 7, and the left end of the positioning frame 801 is fixed to the workbench 2 by bolts, so that the ball head seat 7 is stably installed. Fig.10 As shown in (c) in the figure, the guide frame 5 is rotated so that the guide groove 6 and the ball pin 1 correspond to each other, and the right end of the guide frame 5 is also fixed to the workbench 2 by bolts. Fig.10 As shown in (d), the swing rod 9 is sleeved on the upper end portion of the ball rod 101 and passes through the guide groove 6. Finally, the swing rod 9 is swung in the guide groove 6 to complete the test of the maximum swing angle (θ) of the ball head of the ball stud 1.

[0059] S200: After the swing angle test of the ball pin 1 is completed, the bolt on the right end of the guide frame 5 is loosened, and then the guide frame 5 is rotated 180 degrees around the locking rod 1501 and away from the ball pin 1. At this time, the ball rod 101 of the ball pin 1 is connected to the bottom end of the pressure device 4 through the clamp 17. After the connection, the ball pin 1 is in a vertical state, as shown in FIG. Fig.11 As shown. A vertical downward force F is applied to the ball stud 1 through the pressure device 4. Y ,like Figure 1 As shown, the axial load test of the ball stud 1 can be realized.

[0060] S300: After the axial load test is completed, the fixture 17 is separated from the ball rod 101, and then the positioning device 8 is loosened to release the lock on the ball head seat 7, and then the ball head seat 7 is removed. Fig.12 As shown, the disassembled clamp 17 is installed at the side position of the bracket 3, and the ball rod 101 is connected to the clamp 17, and then the ball head seat 7 is installed at the bottom end position of the pressure device 4 through the clamp 2 18. At this time, the ball stud 1 is in a horizontal state, and finally a vertical downward force is applied to the ball 102 of the ball stud 1 through the pressure device 4, as shown in FIG. Figure 1 As shown, the force at this time corresponds to F X , the radial stiffness test of the ball stud 1 can be realized.

[0061] It should be noted that the first clamp 17 and the second clamp 18 are common knowledge to those skilled in the art. For example, Fig.13 As shown, the second clamp 18 includes an upper clamp 1801 and a lower clamp 1802, and the two clamps can be in a nearly "V" shape. The ball head seat 7 is located between the upper clamp 1801 and the lower clamp 1802, and the two clamps are fastened by bolts to achieve the fixed installation of the ball head seat 7 at the lower end of the pressure device 4. Of course, the first clamp 17 can also use two clamping blocks, and the two clamping blocks are correspondingly adapted to the ball rod 101. The connection between the ball rod 101 and the first clamp 17 can be achieved by tightening the two clamping blocks with bolts.

[0062] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A testing device for a ball stud of an automobile, characterized in that: include: Workbench; A ball head seat, the ball head seat is installed on the top of the workbench, and a ball pin to be tested is arranged in the ball head seat; as well as A guide frame, the guide frame is installed on the top of the workbench, and a guide groove is provided in the guide frame to match the ball rod of the ball stud, and the guide groove is suitable for allowing the ball rod to swing in a set plane, and the set plane is perpendicular to the workbench; The first end of the guide frame is rotatably mounted on the workbench, and the second end of the guide frame is locked with the workbench; The guide frame is in a semicircular structure, and the side of the guide frame has scale lines. The outside of the club is sleeved with a coaxially arranged swing rod, and the swing rod cooperates with the guide groove. A pair of baffles are elastically slidably installed in the guide groove, and a pointer that cooperates with the scale lines is installed on the outside of the baffles; when performing a swing angle test, the swing rod is suitable for squeezing the baffle to slide along the guide groove, thereby causing the pointer and the scale lines to move relative to each other; The guide frame is provided with a limit assembly and an unlocking device, the limit assembly is movably arranged on the guide frame and cooperates with the baffle, and the unlocking device is installed on the guide frame and cooperates with the limit assembly; when performing a swing angle test, the limit assembly is suitable for being located at a first position under the action of the unlocking device, and then the baffle is suitable for hovering at any angle under the action of the limit assembly; after the swing angle test, the guide frame is suitable for rotating along the first end and driving the limit assembly to be located at a second position through the unlocking device, and then the baffle is suitable for moving and resetting under the action of elastic force; The limiting component is a magnetic strip, which is vertically slidably mounted on the guide frame and cooperates with the unlocking device; when the magnetic strip is in the first position, the magnetic strip abuts against the baffle, thereby locking the baffle under the action of magnetic attraction; when the magnetic strip is in the second position, the magnetic strip moves away from the baffle and releases the lock on the baffle; The unlocking device comprises a lock rod and a lock cylinder, wherein the lock rod is vertically mounted on the top of the workbench, the first end of the guide frame is rotatably mounted on the lock rod, the lock cylinder is sleeved on the outside of the lock rod and connected to the magnetic strip, and the lock cylinder and the lock rod are matched through a guide structure; When the guide frame rotates, the lock rod is adapted to drive the lock cylinder to move up and down through the guide structure; The guide structure includes a guide block and a guide rail, wherein the guide rail is a spiral structure and is slidably matched with the guide block; the guide block is installed inside the lock cylinder, and the guide rail is arranged outside the lock rod; Or the guide block is installed outside the lock rod, and the guide rail is arranged inside the lock cylinder.

2. The vehicle ball stud testing device according to claim 1, characterized in that: A pressure device is installed above the workbench through a bracket, and the pressure device is located directly above the ball head seat. A positioning device for locking the ball head seat is provided at the top of the workbench; the upper end of the ball rod is suitable for connecting with the bottom end of the pressure device, and the pressure device is suitable for performing axial load testing on the ball head pin.

3. The vehicle ball stud testing device according to claim 2, characterized in that: The positioning device comprises a positioning frame, a first end of which is rotatably mounted on the workbench; when in use, the positioning frame is adapted to rotate and abut against the top end of the ball head seat, and a second end of the positioning frame is locked with the workbench.

4. A method for testing a ball stud of an automobile, using the testing device for a ball stud of an automobile as claimed in claim 2 or 3, characterized in that: The steps include: S100: installing the ball stud on the workbench through the ball stud seat, and then performing a maximum swing angle test on the ball stud through the guide frame; S200: connecting the upper end of the ball rod to the bottom end of the pressure device through a clamp 1, and then performing an axial load test on the ball stud through the pressure device; S300: The upper end of the ball rod is mounted on the side of the bracket through the clamp 1, and the ball stud is arranged horizontally, and then the ball head seat at the lower end of the ball stud is mounted on the bottom end of the pressure device through the clamp 2, and then the radial load test of the ball stud is performed through the pressure device.

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