A four-station automobile suspension durability test device

Abstract

A four-station automobile suspension durability test device includes a cast iron platform, a suspension mounting base, a suspension mounting assembly, a hydraulic servo actuator, an actuator mounting tailstock, a transmission assembly, and a suspension connecting assembly; wherein the suspension mounting base is mounted on the cast iron platform, and the suspension mounting assembly is mounted on the suspension mounting base; both sides of the suspension mounting assembly are used to mount the tested suspension assembly; the tail end of the hydraulic servo actuator is hinged to the actuator mounting tailstock, and the rod end of the hydraulic servo actuator is hinged to the transmission assembly; the actuator mounting tailstock and the transmission assembly are both mounted on the cast iron platform; one end of the suspension connecting assembly is connected to the tested suspension assembly, and the other end is connected to the transmission assembly, and the hydraulic servo actuator is driven to vertically actuate two groups of tested suspension assemblies on the same side through the transmission assembly and the suspension connecting assembly. The device can test four groups of suspensions at the same time, and can also perform durability tests on the double-sided suspensions of the same axle, with high testing efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile suspension, relates to an automobile suspension testing device, and specifically relates to a four-station automobile suspension durability testing device. Background Art

[0002] Automobile suspension is directly related to the driving safety, handling stability and riding comfort of the vehicle. Therefore, automobile manufacturers pay special attention to the performance of vehicle suspension, especially durability; users have higher and higher requirements for the durability of automobile chassis, especially the durability of suspension. Based on this, automobile manufacturers need to conduct durability tests on suspension components during the process of automobile research and development, trial production and mass production, so as to provide technical support for the design / improvement of automobile suspension design.

[0003] At present, the durability test equipment for automobile suspension parts used by domestic automobile manufacturers has relatively simple functions and is generally dedicated equipment, such as swing arm durability test machine, shock absorber durability test machine, bushing durability test machine, suspension durability test equipment that uses actuators to directly drive the suspension, etc. The above-mentioned structural forms all have certain shortcomings and deficiencies, which are specifically manifested in: ① It is difficult to reproduce the stress state of a single suspension part when it is installed on the actual vehicle for durability testing, resulting in inaccurate test results; ② Each part requires a set of test equipment, resulting in repeated investment and occupying too much R&D funds; ③ The test efficiency is low and the test cycle is increased. Therefore, it is very necessary to develop a new type of automobile suspension durability test device. Summary of the invention

[0004] The purpose of the present invention is to provide a four-station automobile suspension durability test device, which is driven by a hydraulic servo actuator and simultaneously vertically actuates two sets of automobile suspensions through a transmission component to simulate the stress of the suspension when the wheel is subjected to a vertical load, thereby performing a durability test on the automobile suspension and suspension components, and has a steering drive function for the front suspension.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A four-station automobile suspension durability test device comprises a cast iron platform, a suspension mounting base, a suspension mounting assembly, a hydraulic servo actuator, an actuator mounting tailstock, a transmission assembly, and a suspension connecting assembly; wherein two suspension mounting bases are mounted on the cast iron platform, and a suspension mounting assembly is mounted on each suspension mounting base; the structures of the two suspension mounting assemblies are the same or different, and both sides of each suspension mounting assembly are used to mount the tested suspension assembly; the tail end of the hydraulic servo actuator is hinged to the actuator mounting tailstock, and the rod end of the hydraulic servo actuator is hinged to the transmission assembly; the actuator mounting tailstock and the transmission assembly are both mounted on the cast iron platform; one end of the suspension connecting assembly is connected to the tested suspension assembly, and the other end is connected to the transmission assembly, and the hydraulic servo actuator is driven to vertically actuate two groups of tested suspension assemblies on the same side at the same time through the transmission assembly and the suspension connecting assembly.

[0007] As a preferred embodiment of the present invention, the device also includes a steering drive component, a constant temperature test chamber, a hydraulic pump station, and a control system; wherein the steering drive component is selectively installed on a suspension mounting base, located on the outside of the suspension mounting component, and the steering drive component is used to drive the steering gear of the tested suspension component to steer; the constant temperature test chamber is arranged on the suspension mounting base, and the suspension mounting component and the tested suspension component are placed in the constant temperature test chamber; the hydraulic pump station is connected to the hydraulic servo actuator through a hydraulic pipeline; the control system is used to control the opening / closing of the hydraulic pump station, and control the actuation frequency and amplitude of the hydraulic servo actuator; at the same time, the displacement value of the hydraulic servo actuator and the value of the tension and pressure sensor of the suspension connection component are collected.

[0008] As a preferred embodiment of the present invention, the cast iron platform includes two operating platforms and an equipment installation platform; the two operating platforms are arranged on both sides of the equipment installation platform and are horizontally connected to the equipment installation platform; the equipment installation platform is processed with multiple slide grooves in the transverse direction at a position opposite to the transmission assembly and the actuator mounting tailstock, and the equipment installation platform is processed with multiple slide grooves in the longitudinal direction at a position opposite to the suspension mounting base.

[0009] As a preferred embodiment of the present invention, the steering drive assembly includes a mounting seat, a servo motor, a reducer, a reducer mounting seat, a torque sensor, a coupling, and a connecting rod; wherein the mounting seat is arranged on the outside of the front suspension base, the reducer mounting seat is arranged on the mounting seat, the servo motor is fixedly connected to the reducer mounting seat after being connected to the reducer, the reducer is connected to one end of the torque sensor through a coupling, and the other end of the torque sensor is connected to the connecting rod through a coupling; the connecting rod is connected to the steering gear of the suspension assembly being tested.

[0010] As a preferred embodiment of the present invention, the suspension mounting assembly includes a mounting seat and a shock absorber upper point mounting bracket and a suspension guide element mounting bracket installed on both sides of the mounting seat; wherein the shock absorber upper point mounting bracket and the suspension guide element mounting bracket are installed on both sides of the mounting seat according to the hard point coordinates of the tested suspension component in the loaded state; when the tested suspension component installed on the suspension mounting assembly is a front suspension, the suspension mounting assembly also includes a steering gear mounting support.

[0011] As a preferred embodiment of the present invention, the transmission assembly includes a tripod base, a tripod, a suspension connection assembly connecting shaft, a bearing assembly, a tripod rotating shaft, and a hydraulic servo actuator rod end connecting shaft; wherein the tripod is installed in the tripod base, the tripod is fixedly connected to the tripod rotating shaft at the middle position of the horizontal connection part of the suspension assembly to be tested, and the suspension connection assembly connecting shaft is arranged at both ends of the horizontal connection part of the tripod for connecting to the suspension connection assembly; the bearing assembly is arranged on the tripod base, and both ends of the tripod rotating shaft are connected to the bearing assembly; the hydraulic servo actuator rod end connecting shaft is arranged at the vertex of the lower end of the tripod and is located below the tripod rotating shaft.

[0012] As a preferred embodiment of the present invention, the suspension connection assembly includes a spherical joint bearing, a sensor mounting seat, a tension and pressure sensor, a lower screw seat, a screw, an upper screw seat, a spherical joint, and a wheel bracket adapter; wherein the bearing end of the spherical joint bearing is connected to the suspension connection assembly connecting shaft, the other end of the spherical joint bearing is fixedly connected to the sensor mounting seat, the sensor mounting seat is fixedly connected to the tension and pressure sensor, the tension and pressure sensor is fixedly connected to the lower screw seat, the lower screw seat is threadedly connected to one end of the screw, one end of the screw is processed with a left-handed thread, and the other end is processed with a right-handed thread; the other end of the screw is threadedly connected to the upper screw seat, the upper screw seat is threadedly connected to the spherical joint, the ball rod of the spherical joint is connected to the wheel bracket adapter; the wheel bracket adapter is bolted to the wheel bracket of the suspension assembly being tested.

[0013] As a preferred embodiment of the present invention, the constant temperature test chamber includes a test chamber unit and a test chamber intermediate box; wherein, the test chamber intermediate box is arranged on a suspension mounting base, and the test chamber unit is arranged on both sides of the test chamber intermediate box. After the test chamber unit and the test chamber intermediate box are fixed, the tested suspension assembly is placed in the test chamber unit, and the suspension connection assembly passes through the lower plate hole of the test chamber unit.

[0014] As a preferred embodiment of the present invention, the control system includes a PC, a servo drive, and a data acquisition module; wherein the servo valve of the hydraulic servo actuator is connected to the servo drive via a communication cable, the displacement sensor and the tension and pressure sensor, and the torque sensor of the hydraulic servo actuator are connected to the data acquisition module via a communication cable, and the PC, the servo drive, and the data acquisition module are connected via a communication cable.

[0015] As a further preferred embodiment of the present invention, the tripod includes two symmetrically arranged triangular plates, the two triangular plates are connected by a connecting plate, and the two triangular plates are processed with multiple mounting holes at the position of the horizontal connecting part; the connecting shaft of the suspension connecting assembly is installed in any group of mounting holes on both sides; the connecting shaft of the hydraulic servo actuator rod end is arranged between the two triangular plates and close to the vertex position of the lower end of the triangular plates.

[0016] Another object of the present invention is to provide a method for using a four-station automobile suspension durability test device, the method comprising the following steps:

[0017] Step S1, selecting a suspension assembly to be tested, and installing the suspension assembly on both sides of the suspension mounting assembly according to the hard point coordinates of the suspension assembly under the vehicle loading state;

[0018] Step S2, connecting the tested suspension assembly to the suspension connection assembly, and then adjusting the installation positions of the two suspension connection assemblies on the same side on the transmission assembly and the lengths of the suspension connection assemblies according to the vertical travel of the tested suspension assembly;

[0019] Step S3, control the hydraulic pump station to start through the control system, control the actuation of the hydraulic servo actuator, if the tested suspension component is the front suspension, control the actuation of the steering drive component at the same time, and collect data through the tension pressure sensor and the torque sensor, and send the collected data to the control system; when the test device is loaded with vertical displacement / force, sine, sine superposition, and road vertical random waves can be used for loading.

[0020] Advantages and beneficial effects of the present invention:

[0021] 1. The device provided by the present invention has a simple and reasonable structure, compact installation, easy operation and simple maintenance. It can not only perform durability tests on four sets of suspensions of the same vehicle at the same time, but also longitudinally install suspensions of two different models for testing. Moreover, by replacing the suspension installation tooling, it can be applied to both independent suspensions and non-independent suspensions. In addition, the device drives the suspension by road excitation, and the installation of suspension components is consistent with the suspension loading state, which can greatly improve test accuracy, improve test efficiency, reduce the development and test cycle of automobile suspensions, and reduce equipment use costs.

[0022] 2. The device provided by the present invention can not only carry out tests on four groups of suspensions at the same time, but also can carry out performance tests and durability tests on the double-sided suspensions of the same axle of the vehicle, performance and durability tests on a quarter of the suspension, static tests on the suspension, characteristic tests on the suspension system, performance and durability tests on the shock absorbers, and smoothness tests close to the form of the entire vehicle.

[0023] 3. The device provided by the present invention adopts a hydraulic servo actuator as a power source. After transmission by the transmission assembly, one actuator simultaneously performs vertical displacement / force loading on two sets of suspensions; and after the two sets of suspensions are installed, the static loads (vertical loads in the loaded state) are balanced with each other, which can reduce the driving power of the equipment and reduce energy consumption.

[0024] 4. The length of the suspension connection assembly used in the test device provided by the present invention can be adjusted quickly and conveniently; ball joints are provided at both ends, which makes installation convenient and quick; and different suspension connection assembly connecting shaft mounting holes are provided on the transmission assembly, which can adapt to the simultaneous installation of two groups of suspensions with different vertical strokes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an axonometric drawing of the present invention.

[0026] Figure 2 It is an isometric view of the present invention after two sets of constant temperature test box units are hidden.

[0027] Figure 3 It is an axonometric view of the hidden constant temperature test chamber of the present invention.

[0028] Figure 4 The present invention Figure 3 A partial enlarged view of .

[0029] Figure 5 The present invention Figure 3 A partial enlarged view of another part.

[0030] Figure 6 is an axonometric view of the steering drive assembly of the present invention

[0031] Figure 7 It is an axonometric view of the transmission assembly of the present invention.

[0032] Figure 8 It is a side view of the transmission assembly of the present invention.

[0033] Fig. 9 It is an axonometric view of the suspension connection assembly of the present invention.

[0034] Fig.10 It is a control block diagram of the present invention.

[0035] Figure numerals: cast iron platform 1, suspension mounting base 2, steering drive assembly 3, suspension mounting assembly 4, tested suspension assembly 5, hydraulic servo actuator 6, actuator mounting tailstock 7, transmission assembly 8, suspension connection assembly 9, constant temperature test chamber 10, hydraulic pump station 11, control system 12, operating platform 1-1, equipment installation platform 1-2, front suspension base 2-1, rear suspension base 2-2, mounting seat 3-1, servo motor 3-2, reducer 3-3, reducer mounting seat 3-4, torque sensor 3-5, coupling 3-6, connecting rod 3-7, first mounting seat 4-1, first shock absorber upper point mounting bracket 4-2, first suspension guide element mounting bracket 4-3, second mounting seat 4-4, second shock absorber upper point mounting bracket 4-5 , the second suspension guide element mounting frame 4-6, the wheel bracket 5-1, the suspension guide element 5-2, the air spring shock absorber 5-3, the tripod base 8-1, the tripod 8-2, the suspension connecting assembly connecting shaft 8-3, the bearing assembly 8-4, the tripod shaft 8-5, the hydraulic servo actuator rod end connecting shaft 8-6, the triangle plate 8-2-1, the connecting plate 8-2-2, the mounting hole 8-2-3, the spherical bearing 9-1, the sensor mounting seat 9-2, the tension and pressure sensor 9-3, the lower screw seat 9-4, the screw 9-5, the upper screw seat 9-6, the spherical joint 9-7, the wheel bracket adapter 9-8, the test box unit 10-1, the test box middle box 10-2, the PC 12-1, the servo driver 12-2, and the data acquisition module 12-3. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0037] In the description of this application, it should be noted that the terms "inside", "below", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Example 1

[0040] See also Figures 1 to 10 The present invention provides a four-station automobile suspension durability test device, comprising a cast iron platform 1, a suspension mounting base 2, a steering drive assembly 3, a suspension mounting assembly 4, a hydraulic servo actuator 6, an actuator mounting tailstock 7, a transmission assembly 8, a suspension connection assembly 9, a constant temperature test chamber 10, a hydraulic pump station 11, and a control system 12; wherein two suspension mounting bases 2 are mounted on the cast iron platform 1, and each suspension mounting base 2 is mounted with a suspension mounting assembly 4; the steering drive assembly 3 can be selectively mounted on the suspension mounting base 2, and when the steering drive assembly 3 is mounted on the suspension mounting base 2, the steering drive assembly 3 is located on the outside of the suspension mounting assembly 4, and the steering drive assembly 3 is used to drive the steering gear of the tested suspension assembly 5 to steer (when there is no steering gear in the tested suspension assembly 5, the steering drive assembly 3 does not need to be installed on the suspension mounting base 2); the structures of the two suspension mounting assemblies 4 are the same or different, and both sides of each suspension mounting assembly 4 are used to install The tested suspension component 5 is installed; the tail end of the hydraulic servo actuator 6 is hinged with the actuator mounting tailstock 7, and the rod end of the hydraulic servo actuator 6 is hinged with the transmission component 8; the actuator mounting tailstock 7 and the transmission component 8 are both installed on the cast iron platform 1; one end of the suspension connection component 9 is connected to the tested suspension component 5, and the other end is connected to the transmission component 8, and the hydraulic servo actuator 6 is driven, and the two groups of tested suspension components 5 on the same side are vertically actuated simultaneously through the transmission component 8 and the suspension connection component 9; the constant temperature test box 10 is arranged on the suspension mounting base 2, and the suspension mounting component 4 and the tested suspension component 5 are placed in the constant temperature test box 10; the hydraulic pump station 11 is connected to the hydraulic servo actuator 6 through a hydraulic pipeline; the control system 12 is used to control the opening / closing of the hydraulic pump station 11 and control the actuation frequency and amplitude of the hydraulic servo actuator 6; at the same time, the displacement value of the hydraulic servo actuator 6 and the value of the tension and pressure sensor of the suspension connection component 9 are collected.

[0041] Furthermore, the cast iron platform 1 includes two operating platforms 1-1 and an equipment installation platform 1-2; the two operating platforms 1-1 are arranged on both sides of the equipment installation platform 1-2 and are horizontally connected to the equipment installation platform 1-2; the equipment installation platform 1-2 is processed with multiple slide grooves in the horizontal direction at a position opposite to the transmission component 8 and the actuator mounting tail stock 7, and the equipment installation platform 1-2 is processed with multiple slide grooves in the longitudinal direction at a position opposite to the suspension mounting base 2. The setting of the slide grooves can facilitate the adjustment and accurate installation of the positions of the transmission component 8, the actuator mounting tail stock 7 and the suspension mounting base 2.

[0042] In addition, in order to enable the test device of the present application to perform durability tests on four groups of automobile suspensions of the same vehicle at the same time, one of the two suspension mounting bases 2 is a front suspension base 2-1, and the other is a rear suspension base 2-2. The front suspension mounting assembly is installed on the front suspension base 2-1, and the rear suspension mounting assembly is installed on the rear suspension base 2-2. The tested suspension component 5 installed on the front suspension mounting assembly is a front suspension with a steering gear. During the test, it is necessary to drive the steering gear of the tested suspension component 5 to steer through the steering drive assembly 3 installed on the front suspension base 2-1; the tested suspension component 5 installed on the rear suspension mounting assembly is a rear suspension without a steering function. There is no need to use the steering drive assembly 3 during the test, that is, there is no need to install the rear suspension base 2-2 on the rear suspension base 2-2. Of course, in order to enable the test device of the present application to test the suspensions of two different vehicle models installed longitudinally, or to test four different suspensions, the suspension mounting base 2 can also be the front suspension base 2-1 or the rear suspension base 2-2 at the same time, or one of them can be the front suspension base and the other can be the rear suspension base; the selection of the suspension mounting base 2 is selected or adjusted according to actual test requirements.

[0043] Further, the steering drive assembly 3 includes a mounting seat 3-1, a servo motor 3-2, a reducer 3-3, a reducer mounting seat 3-4, a torque sensor 3-5, a coupling 3-6, and a connecting rod 3-7; wherein the mounting seat 3-1 is arranged on the outside of the front suspension base 2-1, the reducer mounting seat 3-4 is arranged on the mounting seat 3-1, the servo motor 3-2 is connected to the reducer 3-3 and then fixedly connected to the reducer mounting seat 3-4, the reducer 3-3 is connected to one end of the torque sensor 3-5 through a coupling 3-6, and the other end of the torque sensor 3-5 is connected to the connecting rod 3-7 through a coupling 3-6; the connecting rod 3-7 is connected to the steering gear of the tested suspension assembly 5 (see Figure 4 , Figure 6 ).

[0044] In order to enable the tested suspension component 5 to simulate the installation method of the actual vehicle, one of the two suspension mounting components 4 is a front suspension mounting component and the other is a rear suspension mounting component; wherein, the front suspension mounting component includes a first mounting seat 4-1 and a first shock absorber upper point mounting bracket 4-2, a first suspension guide element mounting bracket 4-3, and a steering gear mounting support installed on both sides of the first mounting seat 4-1; the rear suspension mounting component includes a second mounting seat 4-4 and a second shock absorber upper point mounting bracket 4-5 and a second suspension guide element mounting bracket 4-6 installed on both sides of the second mounting seat 4-4; the function of the suspension mounting component 4 is mainly to fix the tested suspension component 5 in a simulated actual vehicle installation method; therefore, the shock absorber upper point mounting bracket, the suspension guide element mounting bracket, and the steering gear mounting support on both sides of the mounting seat can be adjusted in position according to the actual vehicle installation state of the tested suspension component 5; that is: the shock absorber upper point mounting bracket, the suspension guide element mounting bracket, and the steering gear mounting support are installed on both sides of the mounting seat according to the hard point coordinates of the tested suspension component 5 under the vehicle loading state.

[0045] In addition, in order to enable those skilled in the art to clearly understand how the tested suspension assembly 5 is installed on the suspension mounting assembly 4, Figure 4 , Figure 5 An independent suspension in which the shock absorber is an air spring shock absorber is used as an example for explanation.

[0046] When the tested suspension component 5 is a rear suspension, the tested suspension component 5 includes a wheel bracket 5-1, a suspension guide element 5-2, and an air spring shock absorber 5-3; wherein the suspension guide element 5-2 is mounted on a second suspension guide element mounting frame 4-6, and the air spring shock absorber 5-3 is mounted on a second shock absorber upper point mounting bracket 4-5; when the tested suspension component 5 is a front suspension, the tested suspension component 5 includes a wheel bracket 5-1, a suspension guide element 5-2, an air spring shock absorber 5-3, and a steering gear; the suspension guide element 5-2 is mounted on a first suspension guide element mounting frame 4-3, and the air spring shock absorber 5-3 is mounted on a first shock absorber upper point mounting bracket 4-2; the steering gear is mounted on a steering gear mounting support.

[0047] Furthermore, there are two hydraulic servo actuators 6, which are arranged on both sides of the suspension mounting base 2, including a hydraulic servo cylinder, a servo valve, and a displacement sensor arranged inside the hydraulic cylinder. The actuator mounting tailstock 7 is installed on the equipment mounting platform 1-2, and the tail end of the hydraulic servo actuator 6 is hinged to the actuator mounting tailstock 7; the hydraulic servo actuator 6 is hinged to the suspension connecting component connecting shaft 8-3 of the transmission component 8;

[0048] The transmission assembly 8 includes a tripod base 8-1, a tripod 8-2, a suspension connection assembly connecting shaft 8-3, a bearing assembly 8-4, a tripod rotating shaft 8-5, and a hydraulic servo actuator rod end connecting shaft 8-6; wherein the tripod 8-2 is installed in the tripod base 8-1, and the tripod 8-2 is fixedly connected to the tripod rotating shaft 8-5 at the middle position of the horizontal connection part a of the tested suspension assembly 5, and the suspension connection assembly connecting shaft 8-3 is arranged at both ends of the horizontal connection part a of the tripod for connecting with the suspension connection assembly 9; the bearing assembly 8-4 is arranged on the tripod base 8-1, and both ends of the tripod rotating shaft 8-5 are connected to the bearing assembly 8-4; the hydraulic servo actuator rod end connecting shaft 8-6 is arranged at the vertex of the lower end of the tripod 8-2 and is located below the tripod rotating shaft 8-5 (see Figure 7 , Figure 8 );

[0049] The suspension connection assembly 9 includes a spherical bearing 9-1, a sensor mounting seat 9-2, a tension and pressure sensor 9-3, a lower screw seat 9-4, a screw 9-5, an upper screw seat 9-6, a spherical joint 9-7, and a wheel bracket adapter 9-8; wherein the bearing end of the spherical bearing 9-1 is connected to the suspension connection assembly connecting shaft 8-3, the other end of the spherical bearing 9-1 is fixedly connected to the sensor mounting seat 9-2, the sensor mounting seat 9-2 is fixedly connected to the tension and pressure sensor 9-3, and the tension and pressure sensor 9 -3 is fixedly connected to the lower screw seat 9-4, the lower screw seat 9-4 is threadedly connected to one end of the screw 9-5, one end of the screw 9-5 is processed with a left-hand thread, and the other end is processed with a right-hand thread; the other end of the screw 9-5 is threadedly connected to the upper screw seat 9-6, the upper screw seat 9-6 is threadedly connected to the ball joint 9-7, the ball rod of the ball joint 9-7 is connected to the wheel bracket adapter 9-8; the wheel bracket adapter 9-8 is bolted to the wheel bracket 5-1 of the tested suspension assembly 5 (see Fig. 9 ).

[0050] The constant temperature test box 10 includes a test box unit 10-1 and a test box intermediate box 10-2; wherein the test box intermediate box 10-2 is arranged on the suspension mounting base 2, and the test box unit 10-1 is arranged on both sides of the test box intermediate box 10-2. After the test box unit 10-1 and the test box intermediate box 10-2 are fixed, the tested suspension component 5 is placed in the test box unit 10-1, and the suspension connection component 9 passes through the lower plate hole of the test box unit 10-1;

[0051] The control system 12 includes a PC 12-1, a servo driver 12-2, and a data acquisition module 12-3; wherein the servo valve of the hydraulic servo actuator 6 is connected to the servo driver 12-2 via a communication cable, the displacement sensor, the tension and pressure sensor, and the torque sensor of the hydraulic servo actuator 6 are connected to the data acquisition module 12-3 via a communication cable, and the PC, the servo driver, and the data acquisition module are connected via a communication cable (see Fig.10 ).

[0052] Furthermore, the tripod 8-2 includes two symmetrically arranged triangular plates 8-2-1, the two triangular plates are connected by a connecting plate 8-2-2, and the two triangular plates are processed with multiple mounting holes 8-2-3 at the position of the horizontal connection part; the suspension connecting assembly connecting shaft 8-3 is installed in any group of mounting holes on both sides to accommodate the simultaneous installation of two groups of suspensions with different vertical strokes; the hydraulic servo actuator rod end connecting shaft 8-6 is arranged between the two triangular plates and close to the vertex position of the lower end of the triangular plates.

[0053] Example 2

[0054] A method for using a four-station automobile suspension durability test device, the method comprising the following steps:

[0055] Step S1, selecting the tested suspension component 5 to be tested, and installing the tested suspension component 5 on both sides of the suspension mounting component 4 according to the hard point coordinates of the tested suspension component 5 in the vehicle loading state;

[0056] Step S2, connecting the tested suspension assembly 5 to the suspension connection assembly 9, and then adjusting the installation positions of the two suspension connection assemblies 9 on the same side on the transmission assembly 8 and the lengths of the suspension connection assemblies 9 according to the vertical travel of the tested suspension assembly 5;

[0057] Step S3, control the hydraulic pump station 11 to start through the control system 12, control the actuation of the hydraulic servo actuator 6, if the tested suspension component 5 is the front suspension during the test, then control the actuation of the steering drive component 3 at the same time, the tension pressure sensor 9-3 and the torque sensor 3-5 collect data, and send the collected data to the control system; when the test device is loaded with vertical displacement / force, sine, sine superposition, and road vertical random waves can be used for loading.

Claims

1. A four-station automobile suspension durability test device, characterized in that: It comprises a cast iron platform, a suspension mounting base, a suspension mounting assembly, a hydraulic servo actuator, an actuator mounting tailstock, a transmission assembly, and a suspension connecting assembly; wherein, two suspension mounting bases are mounted on the cast iron platform, and a suspension mounting assembly is mounted on each suspension mounting base; the structures of the two suspension mounting assemblies are the same or different, and both sides of each suspension mounting assembly are used to mount the tested suspension assembly; the tail end of the hydraulic servo actuator is hinged to the actuator mounting tailstock, and the rod end of the hydraulic servo actuator is hinged to the transmission assembly; the actuator mounting tailstock and the transmission assembly are both mounted on the cast iron platform; one end of the suspension connecting assembly is connected to the tested suspension assembly, and the other end is connected to the transmission assembly, and the hydraulic servo actuator is driven to vertically actuate two groups of tested suspension assemblies on the same side at the same time through the transmission assembly and the suspension connecting assembly; The transmission assembly includes a tripod base, a tripod, a suspension connection assembly connecting shaft, a bearing assembly, a tripod rotating shaft, and a hydraulic servo actuator rod end connecting shaft; wherein the tripod is installed in the tripod base, the tripod is fixedly connected to the tripod rotating shaft at the middle position of the horizontal connection part of the tested suspension assembly, and the suspension connection assembly connecting shaft is arranged at both ends of the horizontal connection part of the tripod for connecting with the suspension connection assembly; the bearing assembly is arranged on the tripod base, and both ends of the tripod rotating shaft are connected to the bearing assembly; the hydraulic servo actuator rod end connecting shaft is arranged at the vertex of the lower end of the tripod and is located below the tripod rotating shaft; The tripod includes two symmetrically arranged triangular plates, which are connected by a connecting plate, and the two triangular plates are processed with multiple mounting holes at the position of the horizontal connecting part; the connecting shaft of the suspension connecting assembly is installed in any group of mounting holes on both sides; the connecting shaft of the hydraulic servo actuator rod end is arranged between the two triangular plates and close to the vertex position of the lower end of the triangular plates.

2. The four-station automobile suspension durability test device according to claim 1 is characterized in that: The device also includes a steering drive component, a constant temperature test chamber, a hydraulic pump station, and a control system; wherein the steering drive component is selectively installed on a suspension mounting base, located outside the suspension mounting component, and the steering drive component is used to drive the steering gear of the tested suspension component to steer; the constant temperature test chamber is arranged on the suspension mounting base, and the suspension mounting component and the tested suspension component are placed in the constant temperature test chamber; the hydraulic pump station is connected to the hydraulic servo actuator through a hydraulic pipeline; the control system is used to control the opening / closing of the hydraulic pump station, and control the actuation frequency and amplitude of the hydraulic servo actuator; at the same time, the displacement value of the hydraulic servo actuator and the value of the tension and pressure sensor of the suspension connection component are collected.

3. The four-station automobile suspension durability test device according to claim 1 or 2, characterized in that: The cast iron platform includes two operating platforms and an equipment installation platform; the two operating platforms are arranged on both sides of the equipment installation platform and are horizontally connected to the equipment installation platform; the equipment installation platform is processed with multiple slide grooves in the horizontal direction at a position opposite to the transmission component and the actuator mounting tailstock, and the equipment installation platform is processed with multiple slide grooves in the longitudinal direction at a position opposite to the suspension mounting base.

4. The four-station automobile suspension durability test device according to claim 2, characterized in that: The steering drive assembly includes a mounting seat, a servo motor, a reducer, a reducer mounting seat, a torque sensor, a coupling, and a connecting rod; wherein the mounting seat is arranged on the outside of the front suspension base, the reducer mounting seat is arranged on the mounting seat, the servo motor is fixedly connected to the reducer mounting seat after being connected to the reducer, the reducer is connected to one end of the torque sensor through a coupling, and the other end of the torque sensor is connected to the connecting rod through a coupling; the connecting rod is connected to the steering gear of the tested suspension assembly.

5. The four-station automobile suspension durability test device according to claim 1 or 2, characterized in that: The suspension mounting assembly includes a mounting seat and a shock absorber upper point mounting bracket and a suspension guide element mounting bracket installed on both sides of the mounting seat; wherein the shock absorber upper point mounting bracket and the suspension guide element mounting bracket are installed on both sides of the mounting seat according to the hard point coordinates of the tested suspension component in the loaded state; when the tested suspension component installed on the suspension mounting assembly is a front suspension, the suspension mounting assembly also includes a steering gear mounting support.

6. The four-station automobile suspension durability test device according to claim 1 or 2, characterized in that: The suspension connection assembly includes a spherical joint, a sensor mounting seat, a tension and pressure sensor, a lower screw seat, a screw, an upper screw seat, a spherical joint, and a wheel bracket adapter; wherein the bearing end of the spherical joint bearing is connected to the suspension connection assembly connecting shaft of the transmission assembly, the other end of the spherical joint bearing is fixedly connected to the sensor mounting seat, the sensor mounting seat is fixedly connected to the tension and pressure sensor, the tension and pressure sensor is fixedly connected to the lower screw seat, the lower screw seat is threadedly connected to one end of the screw, one end of the screw is processed with a left-handed thread, and the other end is processed with a right-handed thread; the other end of the screw is threadedly connected to the upper screw seat, the upper screw seat is threadedly connected to the spherical joint, the ball rod of the spherical joint is connected to the wheel bracket adapter; the wheel bracket adapter is bolted to the wheel bracket of the suspension assembly being tested.

7. The four-station automobile suspension durability test device according to claim 2, characterized in that: The constant temperature test chamber includes a test chamber unit and a test chamber intermediate box; wherein the test chamber intermediate box is arranged on a suspension mounting base, and the test chamber unit is arranged on both sides of the test chamber intermediate box. After the test chamber unit and the test chamber intermediate box are fixed, the tested suspension assembly is placed in the test chamber unit, and the suspension connection assembly passes through the lower plate hole of the test chamber unit.

8. The four-station automobile suspension durability test device according to claim 2, characterized in that: The control system includes a PC, a servo driver, and a data acquisition module; wherein the servo valve of the hydraulic servo actuator is connected to the servo driver via a communication cable, the displacement sensor, the tension and pressure sensor, and the torque sensor of the hydraulic servo actuator are connected to the data acquisition module via a communication cable, and the PC, the servo driver, and the data acquisition module are connected via a communication cable.

9. The method for using the four-station automobile suspension durability testing device according to claim 4, characterized in that: The method comprises the following steps: Step S1, selecting a suspension assembly to be tested, and installing the suspension assembly on both sides of the suspension mounting assembly according to the hard point coordinates of the suspension assembly under the vehicle loading state; Step S2, connecting the tested suspension assembly to the suspension connection assembly, and then adjusting the installation positions of the two suspension connection assemblies on the same side on the transmission assembly and the lengths of the suspension connection assemblies according to the vertical travel of the tested suspension assembly; Step S3, control the hydraulic pump station to start through the control system, control the actuation of the hydraulic servo actuator, if the tested suspension component is the front suspension, control the actuation of the steering drive component at the same time, and collect data through the tension pressure sensor and the torque sensor, and send the collected data to the control system; when the test device is loaded with vertical displacement / force, sine, sine superposition, and road vertical random waves can be used for loading.

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