Automotive tie rod ball joint durability testing device

Abstract

This invention discloses a durability testing device for automotive tie rod ball joints, relating to the field of durability testing technology. It includes: a cabinet, protective sheet metal, a test chamber, a drive cylinder assembly, and a first component. The first component includes: a guide column, a transmission sleeve, an execution spindle, a spray port, a swing servo motor, and a tooling base plate. By setting a guide fine-tuning structure that coordinates the guide column, transmission sleeve, and execution spindle, the upper end of the guide column is rotatably connected to the top of the test chamber cavity. The execution spindle can achieve vertical swing offset synchronously with the ball joint assembly via the transmission sleeve along the guide column. This can correct the loading eccentricity error generated during the compound motion of the ball joint assembly in real time, ensuring that the axial load output by the drive cylinder assembly acts vertically and uniformly on the center position of the ball joint assembly. This effectively solves the problems of uneven loading, uneven force distribution, and test failure and data distortion caused by abnormal local stress in traditional equipment, significantly improving the accuracy of mechanical loading and the consistency of the test.

Description

Technical Field

[0001] This invention relates to the field of durability testing technology, specifically to a durability testing device for automotive tie rod ball joints. Background Technology

[0002] The ball joint of an automotive tie rod is a core and critical connecting component between the steering and running gear systems. It primarily bears the responsibility for transmitting axial and radial loads caused by steering sway, angle adjustment, and road surface disturbances during vehicle operation. Its durability, fatigue resistance, and environmental adaptability directly determine the vehicle's steering accuracy, driving stability, and safety. Therefore, before ball joints leave the factory and during new product development, it is essential to systematically test and verify their friction and wear, fatigue life, and environmental tolerance using professional durability testing equipment.

[0003] Current automotive tie rod ball joint durability testing devices still suffer from numerous technical defects and limitations. Firstly, traditional testing equipment has limited operational simulation capabilities, mostly only able to perform simple oscillating wear tests or basic axial loading tests at room temperature. It cannot simulate complex high and low temperature environments, making it difficult to simultaneously perform multi-dimensional coupled tests involving oscillating cyclic motion, rotational cyclic motion, radial fatigue loading, and axial alternating fatigue loading. This differs significantly from the actual service conditions of automobiles, including alternating high and low temperatures, bumps and impacts, and complex steering friction, resulting in poor data accuracy, low reference value, and an inability to accurately reflect the actual durability performance of the ball joint assembly.

[0004] Secondly, traditional durability testing equipment has structural design shortcomings. The overall structural rigidity of the equipment is insufficient, and long-term high-frequency reciprocating tests are prone to problems such as deformation, resonance, and shaking, resulting in poor testing stability. At the same time, the equipment lacks anti-corrosion design. The test chamber is mostly made of ordinary steel, which is prone to rust and aging when in contact with mud, water stains, lubricating media, and high and low temperature and humid environments, resulting in a short service life. In addition, the appearance and workmanship of traditional equipment are simple, and the protection of parts is insufficient. The overall robustness, durability, and appearance of the equipment cannot meet the standards of modern laboratories.

[0005] Therefore, this invention proposes a durability testing device for automotive tie rod ball joints to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a durability testing device for automotive tie rod ball joints, thereby resolving the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a durability testing device for automotive tie rod ball joints, comprising: a cabinet, a protective sheet metal, a test chamber, a drive cylinder assembly, and a first component, the first component comprising: a guide column, a transmission sleeve, an execution spindle, a spray port, a swing servo motor, and a tooling base plate; The guide column is vertically fixed to the left side of the tooling base plate. The upper end of the guide column is rotatably connected to the top of the test chamber cavity. The transmission sleeve is fixedly connected to the lower end of the guide column. The execution spindle is rotatably connected to the transmission sleeve. The spray port is arranged on the side of the test area corresponding to the execution spindle and is fixedly connected to the inner wall of the execution spindle cavity. The tooling base plate is horizontally laid in the test chamber cavity. Connecting plates are vertically fixed on both sides of the tooling base plate. Two sets of swing servo motors are set on the inner walls of both sides of the test chamber cavity. The drive end of the swing servo motor is connected to the middle of the connecting plate on both sides of the tooling base plate. The tooling base plate is set at the eccentric position at the lower end of the swing servo motor. It also includes a second component for ball head clamping fixture.

[0008] Preferably, the test chamber is fixedly installed on the upper surface of the cabinet, the protective sheet metal is assembled on the left and right sides of the test chamber, the test chamber is a sealed cavity, and the drive cylinder assembly is vertically fixedly installed at the center of the top surface of the test chamber.

[0009] Preferably, a drive housing is fixedly connected to the bottom of the tooling base plate, and a radial servo motor is fixedly installed on the lower surface of the tooling base plate. The upper output shaft of the radial servo motor extends upward and passes through the tooling base plate, and is fixedly connected to the execution spindle. A motor mounting bracket is rotatably connected to the lower output shaft of the radial servo motor. One end of a universal coupling A is installed at the eccentric position at the bottom of the motor mounting bracket. A transmission synchronization rod is rotatably connected to the other end of the universal coupling A. A universal coupling B is rotatably connected to the end of the transmission synchronization rod away from the universal coupling A. A synchronization base is provided on the right side of the radial servo motor. The synchronization base is suspended and fixed to the lower side of the tooling base plate. A motor fixing seat is rotatably connected to the bottom coaxially of the synchronization base.

[0010] Preferably, the radial servo motor is a dual-axis drive motor, the universal coupling A is connected to the universal coupling B through a transmission synchronous connecting rod, the guide column, transmission sleeve, execution spindle, radial servo motor and motor mounting bracket are coaxially arranged, and the transmission end of the universal coupling B is connected to the central shaft of the synchronous base.

[0011] Preferably, the radial servo motor and the synchronous base are both located in the drive housing at the bottom of the tooling base plate, and the end of the universal coupling B away from the transmission synchronous link is rotatably connected to the eccentric part of the motor mounting base.

[0012] Preferably, the second component includes a positioning base and a ball joint assembly. The positioning base is fixedly installed on the right side of the tooling base plate, and the ball joint assembly is detachably installed on the top of the positioning base. The bottom of the positioning base penetrates the tooling base plate and is rigidly connected to the central shaft of the radial servo motor. An upper connecting seat is provided at the upper end of the ball joint assembly. A sensor mounting seat is fixedly connected above the upper connecting seat. A clamping upper pressure block is fixedly connected above the sensor mounting seat. Two sets of clamping upper pressure blocks are symmetrically arranged around the axis of the sensor mounting seat. A clamping shaft is rotatably connected to the middle of the clamping upper pressure block. A loading connecting rod is fixedly connected to the top of the clamping shaft. The top of the loading connecting rod is fixedly connected to the telescopic output shaft at the bottom of the drive cylinder assembly.

[0013] Preferably, the top of the positioning base is provided with a contoured mounting groove that matches the structure of the ball joint assembly, and the upper connecting seat is provided as a 90-degree bent plate.

[0014] Preferably, the clamp shaft is cylindrical and is on the same horizontal axis as the clamp upper pressure block.

[0015] Compared with the prior art, the present invention provides a durability testing device for automotive tie rod ball joints, which has the following advantages: This invention overcomes the limitations of traditional equipment that can only perform single-temperature wear tests. It can simultaneously complete coupled durability tests of specimen oscillating cyclic motion, rotational cyclic motion, radial loading fatigue, and axial alternating loading fatigue under different temperature conditions, perfectly simulating the real stress and wear state of vehicles under complex high and low temperature environments, bumpy conditions, steering, and straight-line driving. Simultaneously, with an adjustable spray port media simulation system, it can simulate corrosion and wear in multiple environments such as clean water, mud, and lubricating media, achieving multi-dimensional coupled testing of temperature, media, mechanical load, and mechanical motion. This completely solves the problems of traditional test conditions being singular, large deviations from actual vehicle service scenarios, and low reference value of test conclusions, significantly improving the comprehensiveness and realism of ball joint durability performance testing.

[0016] This invention optimizes the overall tooling layout and drive structure, allowing the equipment to simultaneously carry two ball joint assembly specimens of the same specifications for synchronous durability testing. The motion conditions, loading parameters, environmental media, and temperature conditions of the two sets of specimens are completely identical, enabling both rapid testing of batch specimens and parallel control testing. Compared with traditional single-station testing equipment, it effectively improves testing efficiency, shortens the R&D testing cycle, and is highly suitable for the needs of automakers and testing institutions for large-scale, standardized durability testing operations.

[0017] This invention features a guide fine-tuning structure that integrates a guide column, a transmission sleeve, and an execution spindle. The upper end of the guide column is rotatably connected to the top of the test chamber cavity. The execution spindle can achieve vertical swing offset synchronized with the ball joint assembly via the transmission sleeve along the guide column. This can correct the loading eccentricity error generated during the compound motion of the ball joint assembly in real time, ensuring that the axial load output by the drive cylinder assembly acts vertically and uniformly on the center position of the ball joint assembly. This effectively solves the problems of uneven loading, uneven force distribution, and abnormal local stress leading to test failure and data distortion in traditional equipment, significantly improving the accuracy of mechanical loading and the consistency of the test.

[0018] A parallel synchronous transmission structure is formed by universal coupling A, transmission synchronous link, and universal coupling B. With the eccentric rotation of the synchronous base and the motor mounting base, the ball head rotation driven by the radial servo motor and the overall swing motion driven by the oscillating servo motor are synchronized in real time. This effectively cancels transmission deviations in the compound motion process and eliminates problems such as transmission jamming, motion interference, and specimen position deviation. At the same time, the guide column, transmission sleeve, execution spindle, and radial servo motor are arranged coaxially to further ensure transmission accuracy. This makes the entire compound motion smooth, orderly, and controllable, greatly improving the stability and reliability of the equipment in continuous durability testing.

[0019] The positioning base's contoured slot limiter, combined with the connecting seat and the semi-enclosed clamping structure of the fixture's pressure block, enables precise positioning of the ball joint assembly, preventing loosening and offset from all directions. The clamping state perfectly matches the actual vehicle assembly conditions. Simultaneously, the sensor mounting base incorporates a high-precision radial force sensor, working in conjunction with the equipment's axial force detection structure to collect, store, and record key parameters such as axial load, radial clamping force, swing angle, and cycle count in real time throughout the entire testing process. This allows for full monitoring and data traceability throughout the test, facilitating subsequent performance analysis, failure tracing, and product iteration optimization, meeting the needs of high-precision R&D and testing.

[0020] The entire machine uses a high-strength steel structure as its main load-bearing component, which has high structural rigidity and robustness. It exhibits no deformation or resonance during long-term high-frequency reciprocating durability testing, demonstrating excellent foundation stability. The equipment exterior is treated with electrostatic spraying, and exposed parts are electroplated. The test chamber interior is constructed of 304 stainless steel, providing excellent rust prevention, corrosion resistance, and resistance to media erosion. It can withstand harsh testing conditions such as spraying mud and sand, water stains, and high and low temperature humidity, effectively preventing equipment corrosion and aging, significantly extending the equipment's service life. At the same time, the overall appearance of the machine is neat and aesthetically pleasing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a diagram of the internal structure of the experimental chamber of this invention; Figure 3This is a front view of the internal structure of the test chamber of the present invention; Figure 4 This is a bottom view of the first and second components of the present invention; Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is a partial structural diagram of the first component of the present invention; Figure 7 This is a disassembled structural diagram of the second component of the present invention.

[0022] In the picture: 11. Cabinet; 12. Protective sheet metal; 13. Test chamber; 14. Drive cylinder assembly; 21. Guide column; 22. Transmission sleeve; 23. Actuating spindle; 24. Spray port; 25. Oscillating servo motor; 26. Tooling base plate; 27. Drive housing; 28. Radial servo motor; 29. ​​Motor mounting bracket; 210. Universal coupling A; 211. Transmission synchronous link; 212. Universal coupling B; 213. Motor mounting base; 214. Synchronization base; 31. Positioning base; 32. Ball head assembly; 33. Upper connecting seat; 34. Sensor mounting seat; 35. Upper clamping block of the fixture; 36. Fixture shaft; 37. Loading connecting rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Example Please refer to Figures 1 to 5 As shown: To address the problems mentioned in the technical solutions, this invention provides an automotive tie rod ball joint durability testing device, comprising: a cabinet 11, a protective sheet metal 12, a test chamber 13, a drive cylinder assembly 14, and a first component, the first component comprising: a guide column 21, a transmission sleeve 22, an execution spindle 23, a spray port 24, a swing servo motor 25, and a tooling base plate 26. The guide column 21 is vertically fixed to the left side of the tooling base plate 26. The upper end of the guide column 21 is rotatably connected to the top of the inner cavity of the test chamber 13. The transmission sleeve 22 is fixedly connected to the lower end of the guide column 21. The actuator spindle 23 is rotatably connected to the transmission sleeve 22. The actuator spindle 23 achieves precise vertical swing offset along the guide column 21 through the transmission sleeve 22, ensuring that the radial load output by the drive cylinder assembly 14 acts vertically and evenly on the center position of the ball joint assembly 32. The spray port 24 is arranged on the side of the actuator spindle 23 corresponding to the test area and is fixedly connected to the inner cavity wall of the actuator spindle 23. The spray port 24 is arranged facing the friction pair area of ​​the ball joint assembly 32 and is used to spray working media such as clean water, mud and sand mixture, and lubricating medium to restore the real driving environment of the automotive tie rod ball joint. The spray flow rate and spray angle can be adjusted as needed to adapt to the ball head durability test requirements of different scenarios. The tooling base plate 26 is laid horizontally in the inner cavity of the test chamber 13. The tooling base plate 26 is vertically fixed with connecting plates on both sides. Two sets of swing servo motors 25 are set on the inner walls of both sides of the inner cavity of the test chamber 13. The drive end of the swing servo motor 25 is connected to the middle of the connecting plates on both sides of the tooling base plate 26. The tooling base plate 26 is set at the eccentric position at the lower end of the swing servo motor 25, which can drive the tooling base plate 26 to swing the swing servo motor 25 as a axis. The tooling base plate 26 is rigidly connected to the drive end of the swing servo motor 25 through the connecting plates on both sides. It can achieve reciprocating swing at a fixed angle and frequency under the drive of the swing servo motor 25, accurately simulating the swing wear condition of the ball head during vehicle steering. It also includes a second component for ball head clamping fixture.

[0026] The test chamber 13 is fixedly installed on the upper surface of the cabinet 11. The protective sheet metal 12 is assembled on the left and right sides of the test chamber 13, and together with the test chamber 13, they enclose a sealed test protection space. The test chamber 13 is a sealed cavity that provides an independent sealed space for spraying and composite mechanical durability tests, preventing media from splashing and contaminating the equipment. The drive cylinder assembly 14 is vertically fixedly installed at the center of the top surface of the test chamber 13.

[0027] A drive housing 27 is fixedly connected below the tooling base plate 26 to accommodate and install various drive transmission structures at the bottom. A radial servo motor 28 is fixedly installed on the lower surface of the tooling base plate 26. The radial servo motor 28 is a dual-axis drive motor. The output shaft of the radial servo motor 28 extends upward and passes through the tooling base plate 26, and is fixedly connected to the execution spindle 23. A motor mounting bracket 29 is rotatably connected to the lower output shaft of the radial servo motor 28. One end of a universal coupling A210 is installed at the eccentric position at the bottom of the motor mounting bracket 29. The other end of the universal coupling A210 is rotatably connected to a transmission synchronization rod 211. The end of the transmission synchronization rod 211 away from the universal coupling A210 is rotatably connected to a universal coupling B212. The universal coupling A210 is connected to the universal coupling B212 through the transmission synchronization rod 211. The universal coupling A210, the transmission synchronization rod 211, and the universal coupling are all connected. The universal coupling B212 forms a parallel synchronous transmission structure, which can effectively offset the transmission deviation in the compound motion process of the equipment, realize the synchronous linkage of the rotation and swinging motion of the ball head assembly 32, and ensure that there is no jamming or positional deviation during operation. The guide column 21, transmission sleeve 22, execution spindle 23, radial servo motor 28 and motor mounting bracket 29 are set coaxially. A synchronous base 214 is set on the right side of the radial servo motor 28. The transmission end of the universal coupling B212 is connected to the central shaft of the synchronous base 214. The synchronous base 214 is hoisted and fixed on the lower side of the tooling base plate 26. The motor fixing seat 213 is rotatably connected at the coaxial center of the bottom of the synchronous base 214. The radial servo motor 28 and the synchronous base 214 are all set in the drive receiving chamber 27 at the bottom of the tooling base plate 26. The end of the universal coupling B212 away from the transmission synchronous connecting rod 211 is rotatably connected to the motor fixing seat 213 at the eccentric point.

[0028] A further embodiment: Please refer to Figures 5 to 7 As shown: The second component includes a positioning base 31 and a ball joint assembly 32. The top of the positioning base 31 is provided with a contoured mounting groove that matches the structure of the ball joint assembly 32. The ball joint assembly 32 achieves precise positioning and anti-loosening limit through the contoured mounting groove, ensuring the stability of the specimen installation position during the test. The positioning base 31 is fixedly installed on the right side of the tooling base plate 26 to limit and fix the ball joint specimen of the automobile tie rod to be tested. The ball joint assembly 32 is detachably installed on the top of the positioning base 31. The bottom of the positioning base 31 penetrates through the tooling base plate 26 and is rigidly connected to the central shaft of the radial servo motor 28, and can rotate synchronously with the radial servo motor 28. The upper end of the ball joint assembly 32 is provided with an upper connecting seat 33 to clamp and fix the upper end of the tie rod of the ball joint assembly 32 and transmit axial alternating load. The semi-enclosed design forms a support for the tie rod part of the ball joint assembly 32. The upper connecting seat 33 is set as a 90-degree bent plate with stable radial clamping limit. A sensor mounting seat 34 is fixedly connected above the upper connecting seat 33. A radial force detection sensor is embedded inside the sensor mounting seat 34, which can collect, store and record the axial alternating load and radial clamping load data of the entire test process in real time, so as to realize the full traceability of test data. A clamp upper pressure block 35 is fixedly connected above the sensor mounting seat 34. Two sets of clamp upper pressure blocks 35 are symmetrically arranged with the axis of the sensor mounting seat 34 as the center. A clamp shaft 36 is rotatably connected to the middle of the clamp upper pressure block 35. The clamp shaft 36 is set as a cylinder and is on the same horizontal axis as the clamp upper pressure block 35. A loading connecting rod 37 is fixedly connected to the top of the clamp shaft 36. The top of the loading connecting rod 37 is fixedly connected to the telescopic output shaft at the bottom of the drive cylinder assembly 14.

[0029] The machine features a steel structure for high stability and robustness, is equipped with quick-change fixtures for easy assembly of different specimens, has an electrostatic sprayed exterior, electroplated parts, and an internal structure made of 304 stainless steel for high rust resistance and an attractive appearance.

[0030] The working principle of all the content in the above embodiments is as follows: During use, the ball joint assembly 32 to be tested is placed inside the contour mounting groove on top of the positioning base 31. The contour structure is used to precisely limit and prevent loosening of the ball joint assembly 32, ensuring that the specimen does not shift or become loose during the test. Then, the tie rod part at the upper end of the ball joint assembly 32 is inserted into the tooling clamping area. The upper connecting seat 33 with a 90-degree bending structure, together with two sets of symmetrically arranged clamping blocks 35, forms a semi-enclosed stable radial clamping limit on the tie rod part. The sensor mounting seat 34 is fixed above the upper connecting seat 33. The built-in high-precision radial force sensor monitors and locks the radial clamping preload in real time, ensuring that the clamping state is consistent with the actual vehicle assembly condition.

[0031] After clamping, the device's spray system is activated, and the spray port 24, fixed to the inner wall of the actuator spindle 23, sprays a simulated working condition medium towards the friction pair area between the ball and the ball cup of the ball head assembly 32. Depending on the test requirements, a single or mixed medium from water, mud and sand mixture, and lubricating medium can be selectively sprayed. The spray flow rate and spray angle can be precisely adjusted to comprehensively cover the ball head friction and wear area, realistically recreating the complex service environment of rain, mud and sand erosion, and lubrication wear during outdoor vehicle operation. This provides corrosion and wear conditions closely resembling those of a real vehicle for durability testing. The spraying process runs continuously throughout the overall durability test.

[0032] The loading connecting rod 37 stably transmits the axial alternating load to the tie rod end of the ball joint assembly 32 through the coaxially arranged cylindrical clamp shaft 36. During the test, the upper end of the guide column 21 is rotatably connected to the top of the inner cavity of the test chamber 13, and the lower end of the guide column 21 is fixed with the transmission sleeve 22. The actuator spindle 23 is rotatably connected to the transmission sleeve 22, so that the actuator spindle 23 can be vertically oscillating and offset along the guide column 21 through the transmission sleeve 22, effectively correcting the loading deviation and ensuring that the axial load output by the drive cylinder assembly 14 acts vertically and evenly on the center position of the ball joint assembly 32, accurately simulating the axial alternating fatigue load borne by the ball joint during vehicle bumps, braking, and steering.

[0033] After the load preloading is completed, the two sets of swing servo motors 25 installed on the inner walls of both sides of the test chamber 13 start synchronously. The drive end of the swing servo motor 25 is rigidly connected to the middle position of the connecting plates on both sides of the fixture base plate 26, and the fixture base plate 26 is set at the eccentric position at the lower end of the swing servo motor 25, so that the fixture base plate 26 performs stable reciprocating swing motion with the two sets of swing servo motors 25 as the axis, according to the preset angle and preset frequency. The fixture base plate 26 drives the top fixed positioning base 31 and ball joint assembly 32 to swing synchronously, accurately replicating the ball joint's large-angle reciprocating friction and wear conditions caused by frequent turning, U-turns and road deviations during vehicle driving, and realizing the ball joint swing fatigue durability test.

[0034] The radial servo motor 28, located inside the drive housing 27, starts working. The radial servo motor 28 adopts a dual-axis drive structure, with its upper output shaft passing through the tooling base plate 26 and fixedly connected to the execution spindle 23. Its lower output shaft is rotatably connected to the motor mounting bracket 29. Furthermore, the guide column 21, transmission sleeve 22, execution spindle 23, radial servo motor 28, and motor mounting bracket 29 are all coaxially arranged to ensure transmission accuracy. When the radial servo motor 28 is working, it drives the positioning base 31 and the ball joint assembly 32 to continuously rotate coaxially, simulating the rotational friction and wear conditions of the ball joint itself when the vehicle is traveling straight and making slight turns.

[0035] Meanwhile, a universal coupling A210 is hinged to the eccentric bottom of the motor mounting bracket 29. Universal coupling A210 is hinged to universal coupling B212 via a transmission synchronizing rod 211 to form a parallel synchronous transmission structure. Universal coupling B212 is connected to the central shaft of the synchronous base 214, which is suspended and fixed to the underside of the tooling base plate 26. The bottom of the synchronous base 214 is coaxially connected to the eccentric position of the motor mounting base 213. This entire synchronous transmission structure effectively counteracts the transmission deviation caused by the compound motion of the device, achieving real-time synchronous linkage between the rotation of the ball joint assembly 32 and the swinging motion of the tooling base plate 26, eliminating transmission jamming and positional offset problems, and ensuring the authenticity and stability of the compound working condition test.

[0036] Once the number of test cycles reaches the preset threshold, the device automatically controls the drive cylinder assembly 14, the swing servo motor 25, the radial servo motor 28, and the spray system to stop synchronously, terminating all test actions. Workers remove the protective sheet metal 12, loosen the clamping block 35 and the upper connecting seat 33, and remove the tested ball head assembly 32. They then inspect performance indicators such as ball head clearance change, ball wear, ball cup cracking, looseness failure, and corrosion wear to determine if the ball head durability meets the standards. After the test, all transmission and loading components are returned to their initial zero position. The spray waste liquid, mud, and wear debris inside the test chamber 13 are cleaned, completing the equipment cleaning and reset process, ready for the next set of test pieces.

[0037] Please refer to the above work process. Figures 1 to 7 .

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A durability testing device for automotive tie rod ball joints, comprising: Cabinet (11), protective sheet metal (12), test chamber (13), drive cylinder assembly (14), and first component, characterized in that: the first component includes: guide column (21), transmission sleeve (22), execution spindle (23), spray port (24), swing servo motor (25), tooling base plate (26). The guide column (21) is vertically fixed to the left side of the tooling base plate (26). The upper end of the guide column (21) is rotatably connected to the top of the inner cavity of the test chamber (13). The transmission sleeve (22) is fixedly connected to the lower end of the guide column (21). The execution spindle (23) is rotatably connected to the transmission sleeve (22). The spray port (24) is arranged on the side of the test area corresponding to the execution spindle (23) and is fixedly connected to the inner wall of the execution spindle (23). The tooling base plate (26) is horizontally laid in the inner cavity of the test chamber (13). Connecting plates are vertically fixed on both sides of the tooling base plate (26). Two sets of swing servo motors (25) are set on the inner walls of both sides of the inner cavity of the test chamber (13). The driving end of the swing servo motor (25) is connected to the middle of the connecting plates on both sides of the tooling base plate (26). The tooling base plate (26) is set at the eccentric position at the lower end of the swing servo motor (25). It also includes a second component for ball head clamping fixture.

2. The automobile tie rod ball joint durability testing device according to claim 1, characterized in that: The test chamber (13) is fixedly installed on the upper surface of the cabinet (11), the protective sheet metal (12) is assembled on the left and right sides of the test chamber (13), the test chamber (13) is a sealed cavity, and the drive cylinder assembly (14) is vertically fixedly installed at the center of the top surface of the test chamber (13).

3. The automobile tie rod ball joint durability testing device according to claim 1, characterized in that: A drive housing (27) is fixedly connected below the tooling base plate (26). A radial servo motor (28) is fixedly installed on the lower surface of the tooling base plate (26). The upper output shaft of the radial servo motor (28) extends upward through the tooling base plate (26) and is fixedly connected to the execution spindle (23). A motor mounting bracket (29) is rotatably connected to the lower output shaft of the radial servo motor (28). One end of a universal coupling A (210) is installed at the eccentric position at the bottom of the motor mounting bracket (29). The other end of the universal coupling A (210) is rotatably connected to a transmission synchronous link (211). The end of the transmission synchronous link (211) away from the universal coupling A (210) is rotatably connected to a universal coupling B (212). A synchronous base (214) is provided on the right side of the radial servo motor (28). The synchronous base (214) is hoisted and fixed to the lower side of the tooling base plate (26). A motor fixing seat (213) is rotatably connected to the bottom coaxial center of the synchronous base (214).

4. The automobile tie rod ball joint durability testing device according to claim 3, characterized in that: The radial servo motor (28) is a dual-axis drive motor. The universal coupling A (210) is connected to the universal coupling B (212) through the transmission synchronous link (211). The guide column (21), transmission sleeve (22), execution spindle (23), radial servo motor (28) and motor mounting bracket (29) are coaxially arranged. The transmission end of the universal coupling B (212) is connected to the central shaft of the synchronous base (214).

5. The automotive tie rod ball joint durability testing device according to claim 3, characterized in that: The radial servo motor (28) and the synchronous base (214) are both located in the drive housing (27) at the bottom of the tooling base plate (26). The end of the universal coupling B (212) away from the transmission synchronous link (211) is rotatably connected to the motor mounting base (213) at the eccentric point.

6. The automobile tie rod ball joint durability testing device according to claim 1, characterized in that: The second component includes a positioning base (31) and a ball head assembly (32). The positioning base (31) is fixedly installed on the right side of the tooling base plate (26). The ball head assembly (32) is detachably installed on the top of the positioning base (31). The bottom of the positioning base (31) passes through the tooling base plate (26) and is rigidly connected to the central shaft of the radial servo motor (28). An upper connecting seat (33) is provided on the upper end of the ball head assembly (32). A sensor mounting seat (34) is fixedly connected above the upper connecting seat (33). A clamping upper pressure block (35) is fixedly connected above the sensor mounting seat (34). Two sets of clamping upper pressure blocks (35) are symmetrically arranged around the axis of the sensor mounting seat (34). A clamping shaft (36) is rotatably connected in the middle of the clamping upper pressure block (35). A loading connecting rod (37) is fixedly connected to the top of the clamping shaft (36). The top of the loading connecting rod (37) is fixedly connected to the telescopic output shaft at the bottom of the drive cylinder assembly (14).

7. The automobile tie rod ball joint durability testing device according to claim 6, characterized in that: The top of the positioning base (31) is provided with a contour mounting groove that matches the structure of the ball head assembly (32), and the upper connecting seat (33) is provided as a ninety-degree bent plate.

8. The automotive tie rod ball joint durability testing device according to claim 6, characterized in that: The clamp shaft (36) is cylindrical and is on the same horizontal axis as the clamp upper pressure block (35).

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