Automobile suspension pipeline test system

Abstract

The invention relates to the technical field of automobile suspension fatigue verification, in particular to an automobile suspension pipeline test system. The device comprises an environment box, a vibration rotating mechanism and a medium pressure mechanism, the medium pressure mechanism comprises a high-temperature medium box, a medium liquid outlet valve, a medium circulating pump, a one-way valve, a pressure cylinder and a hydraulic control one-way valve, an automobile suspension test piece is located in the environment box, and test tools are installed at the two ends of the automobile suspension test piece. The output end of the vibration rotating mechanism extends into the environment box and is connected with a test tool of an automobile suspension test piece, and the output end of the high-temperature medium box, the one-way valve, the medium circulating pump, a medium cavity of the pressure cylinder and the test tool of the automobile suspension test piece are in one-way communication through a pipeline and form a one-way passage through the interior of an automobile suspension. The test tool of the automobile suspension test piece, the hydraulic control one-way valve and the high-temperature medium box are in one-way communication through a pipeline. Through synchronous work of the environment box, the vibration rotation system and the medium pressure system, the test process is simplified, and the test cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive suspension fatigue verification technology, and in particular to an automotive suspension piping testing system. Background Technology

[0002] With technological advancements, automotive design prioritizes lightweight construction, safety, and comfort. As cars travel on different road surfaces (e.g., city roads, rural roads) and in varying weather conditions, their operating conditions change accordingly. These changes include exposure to vibrations, impacts, high temperatures, and cold weather. Since the suspension system is crucial for absorbing these impacts, safety is paramount. Before product finalization and delivery, automotive suspension systems undergo a series of tests to verify product quality.

[0003] The suspension piping is a core component of the suspension system, responsible for media delivery and pressure transmission. Its durability directly affects the safety of the entire vehicle. In actual operating conditions, the suspension piping must simultaneously withstand the combined effects of vertical vibration, axial rotation, high and low temperatures, and media pressure, making it prone to wear, leakage, and other failures. Therefore, its durability testing is particularly crucial.

[0004] Existing testing equipment suffers from the following shortcomings: it cannot simultaneously simulate vertical vibration and axial rotation; its environmental temperature control and auxiliary structures are inadequate; its precision in coordinating the control of medium pressure and temperature is insufficient and it lacks an environmentally friendly recycling structure; and its modules exhibit poor coordination, resulting in large deviations in test results and cumbersome procedures. Therefore, developing a multi-condition coordinated suspension pipeline durability testing device has become an urgent problem to be solved. Summary of the Invention

[0005] This invention provides an automotive suspension piping testing system, which aims to solve the problems existing in current automotive suspension testing devices.

[0006] This invention provides an automotive suspension piping testing system, comprising an environmental chamber, a vibration rotation mechanism, and a medium pressure mechanism. The medium pressure mechanism includes a high-temperature medium tank, a medium outlet valve, a medium circulation pump, a one-way valve, a booster cylinder, and a hydraulically controlled one-way valve. The automotive suspension test piece is located inside the environmental chamber, and test fixtures are installed at both ends of the automotive suspension test piece. The output end of the vibration rotation mechanism extends into the environmental chamber and is connected to the test fixtures of the automotive suspension test piece. The output end of the high-temperature medium tank, the one-way valve, the medium circulation pump, the medium chamber of the booster cylinder, and the test fixture at one end of the automotive suspension test piece are sequentially connected in one direction through piping, forming a one-way passage through the interior of the automotive suspension. The test fixture at the other end of the automotive suspension test piece, the hydraulically controlled one-way valve, and the high-temperature medium tank are sequentially connected in one direction through piping.

[0007] As a further improvement of the present invention, the medium pressure mechanism further includes a medium pressure sensor and a medium temperature sensor, which are respectively connected to the pipeline.

[0008] As a further improvement of the present invention, the medium pressure mechanism further includes a pressure shut-off valve and a medium pressure gauge, wherein the medium pressure gauge is connected to the pipeline through the pressure shut-off valve.

[0009] As a further improvement of the present invention, the medium pressure mechanism further includes a liquid outlet filter, which is installed on the pipeline between the medium outlet valve and the medium circulation pump.

[0010] As a further improvement of the present invention, the medium pressure mechanism further includes a waste liquid tank, a ball valve, a waste liquid filter, and a medium recovery pump. The bottom of the environmental tank is provided with a leakage box. The leakage box, waste liquid tank, ball valve, waste liquid filter, medium recovery pump, and high-temperature medium tank are sequentially connected in one direction through pipelines.

[0011] As a further improvement of the present invention, the medium pressure mechanism further includes a purging device and a purging check valve, wherein the purging device is connected to the pipeline through the purging check valve.

[0012] As a further improvement of the present invention, the vibration rotation mechanism includes a vibration support, a rotation platform, a vibration cylinder, a rotation drive motor, a transmission assembly, and a rotation output shaft. The top of the vibration support is provided with multiple guide grooves, and multiple sets of guide wheels are connected around the rotation platform. Each set of guide wheels is slidably engaged with each guide groove. The vibration cylinder is mounted on the vibration support, and the output end of the vibration cylinder is connected to the rotation platform. At least one rotation output shaft is movably connected to the rotation platform. The rotation drive motor is mounted on the rotation platform and is connected to at least one rotation output shaft through the transmission assembly. The test fixture is fixed on the rotation output shaft.

[0013] As a further improvement of the present invention, the transmission assembly includes an output gear, a double-sided rack, a rotating shaft gear, a rack slide rail, and a rack slider. The output gear is connected to the output end of a rotary drive motor. The double-sided rack is movably connected to a rotating platform. The rotating shaft gear is connected to a rotary output shaft. One side of the double-sided rack meshes with the output gear, and the other side of the double-sided rack meshes with at least one rotating shaft gear. The rack slide rail is connected to both ends of one side of the double-sided rack. The rack slider is connected to the rotating platform, and the rack slide rail and rack slider slide in a sliding engagement. The rotary drive motor drives the double-sided rack to reciprocate along its axial direction through the output gear.

[0014] As a further improvement of the present invention, the vibration rotation mechanism further includes position sensors and sensing plates. A plurality of position sensors are mounted on the rotation platform and located on one side of the double-sided rack. The sensing plates are mounted on the double-sided rack and move between the plurality of position sensors along with the double-sided rack. Sensing occurs when the sensing plates move to align with the position sensors.

[0015] As a further improvement of the present invention, the automotive suspension pipeline testing system also includes a hydraulic power source, a hydraulic output cylinder, and a power source pressure gauge. The hydraulic power source is connected to the hydraulic chamber of the booster cylinder and the vibration cylinder respectively through the hydraulic output cylinder. The hydraulic power source is connected to a hydraulically controlled check valve, and the power source pressure gauge is connected to the hydraulic power source.

[0016] The beneficial effects of this invention are as follows: The environmental chamber integrates high and low temperature control, lighting, temperature measurement, and door limit structures, which can simulate extreme temperature change conditions, taking into account experimental observation, precise temperature control, and operational safety; the medium pressure system can accurately and collaboratively control the medium pressure and temperature, while achieving energy conservation and environmental protection through medium circulation and waste liquid recovery; the vibration and rotation system enables synchronous vertical vibration and axial rotation, accurately simulating the combined stress state of the suspension pipeline; the environmental chamber, vibration and rotation system, and medium pressure system work synchronously, simplifying the test process, shortening the cycle, meeting the needs of batch testing, and reducing test costs. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of the automotive suspension piping testing system of the present invention; Figure 2 This is an overall structural diagram of the vibration rotation mechanism in this invention; Figure 3 This is a first partial structural diagram of the vibration rotation mechanism in this invention; Figure 4 This is a second partial structural diagram of the vibration rotation mechanism in this invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1As shown, an automotive suspension pipeline testing system of the present invention includes an environmental chamber 18, a vibration rotation mechanism, and a medium pressure mechanism. The medium pressure mechanism includes a high-temperature medium tank 6, a medium outlet valve 4, a medium circulation pump 21, a one-way valve 22, a booster cylinder 20, and a hydraulically controlled one-way valve 5. The automotive suspension test piece 30 is located inside the environmental chamber 18. Test fixtures 29 are installed at both ends of the automotive suspension test piece 30. The output end of the vibration rotation mechanism extends into the environmental chamber 18 and is connected to the test fixtures 29 of the automotive suspension test piece 30. The output end of the high-temperature medium tank 6, the one-way valve 22, the medium circulation pump 21, the medium chamber of the booster cylinder 20, and the test fixture 29 at one end of the automotive suspension test piece 30 are sequentially connected in one direction through pipelines. After forming a one-way passage through the inside of the automotive suspension, the test fixture 29, the hydraulically controlled one-way valve 5, and the high-temperature medium tank 6 at the other end of the automotive suspension test piece 30 are sequentially connected in one direction through pipelines.

[0020] This experimental system consists of three parts: an environmental chamber 18, a vibration rotation system, and a medium pressure system.

[0021] The environmental chamber 18 includes a high-temperature heating and low-temperature cooling system, a lighting system, a temperature measurement system, and door limit switches. The high-temperature heating and low-temperature cooling system is located at the bottom of the environmental chamber 18 and primarily heats and cools the air. Heating is achieved through internal heating wires, and the low-temperature cooling system uses a refrigerant compressor, similar to a home air conditioner. The environmental chamber 18 can be a normal temperature environmental chamber, a high-temperature environmental chamber, a low-temperature environmental chamber, or a high-low temperature environmental chamber.

[0022] The medium pressure system consists of a pressure source, a high-temperature medium tank 6, a medium circulation pump 21, a temperature sensor, a pressure sensor, and a waste liquid tank 10.

[0023] The medium is first stored in a high-temperature medium tank 6, and then connected by pipelines to the standard medium outlet valve 4, Y-type outlet filter valve, medium circulation pump 21, check valve, and booster cylinder 20. The outlet of the booster cylinder 20 is then connected by pipelines to one end of the test fixture 29 in the environmental chamber 18. An automotive suspension test piece 30 is connected to the fixture. Figure 1 The test fixture 29 on the left is closed, while the test fixture 29 on the right is internally connected. The arc-shaped line represents the automotive suspension test piece 30. The medium flows in from one test fixture 29 on the left, passes through part of the automotive suspension test piece 30, and then enters the test fixture 29 on the right. The medium in the test fixture 29 on the right continues to flow unidirectionally through the remaining part of the automotive suspension test piece 30 before exiting into the other test fixture 29 on the left. Then, the outlet on the other side of the test fixture 29 connects to the hydraulically controlled check valve 5, and then flows back to the high-temperature medium tank 6. The medium flow is circulated by the medium circulation pump 21, filling the pipeline with liquid. Multiple check valves are installed in the pipeline to ensure that the medium circulates in a single direction.

[0024] The medium pressure mechanism also includes a medium pressure sensor 27 and a medium temperature sensor 28, which are respectively connected to the pipeline. The medium pressure sensor 27 and the medium temperature sensor 28 can collect and feed back the corresponding signals in the pipeline in real time. The operator can adjust the output pressure of the booster cylinder 20 and the heating temperature of the high-temperature medium tank 6, etc., based on the feedback pressure and temperature information.

[0025] The medium pressure mechanism also includes a pressure shut-off valve 26 and a medium pressure gauge 25, which is connected to the pipeline via the pressure shut-off valve 26. The medium pressure gauge 25 is used to display the pressure in the pipeline during the test. The function of the pressure shut-off valve 26 is to cut off the pipeline between the sample and the medium pressure gauge 25. The pulse test is a long-term fatigue test, and long-term pressure changes in the medium pressure gauge 25 will reduce its lifespan. When the medium pressure gauge 25 is not needed, the pressure shut-off valve 26 can be closed.

[0026] The medium pressure mechanism also includes an outlet filter 3, which is installed on the pipeline between the medium outlet valve 4 and the medium circulation pump 21. The outlet filter 3 adopts a Y-type filter structure, mainly used to filter the medium pumped into the pipeline from the high-temperature medium tank 6, protecting components such as the medium circulation pump 21 and the booster cylinder 20.

[0027] The medium pressure mechanism also includes a waste liquid tank 10, a ball valve 9, a waste liquid filter 8, and a medium recovery pump 7. The bottom of the environmental tank 18 is equipped with a leakage box 31. The leakage box 31, waste liquid tank 10, ball valve 9, waste liquid filter 8, medium recovery pump 7, and high-temperature medium tank 6 are connected in one direction through pipelines.

[0028] After the test, the medium in the pipeline is purged into the environmental chamber 18, or when the product fails during the test and the medium flows out into the environmental chamber 18, the medium will flow into the leakage box 31. The medium outlet valve 4 of the leakage box 31 is opened to allow the medium to flow into the waste liquid tank 10 for recovery. The waste liquid tank 10 is equipped with a level float. When the level of the recovered waste liquid contacts the level float, the ball valve 9 is opened, and the waste liquid is filtered and returned to the high-temperature medium tank 6 under the action of the medium recovery pump 7.

[0029] Waste liquid filter 8 adopts a Y-type filter structure. When the car suspension product breaks during the test, residual waste may fall into the leakage box 31 at the bottom of the environmental tank 18 and flow into the waste liquid tank 10. The main function of waste liquid filter 8 is to filter the liquid in waste liquid tank 10 and then return it to the high temperature medium tank 6 for reuse.

[0030] The medium pressure mechanism also includes a purging device 24 and a purging check valve 23. The purging device 24 is connected to the pipeline via the purging check valve 23. The purging device 24 is connected to compressed air. After the test, the automotive suspension test piece 30 contains a large amount of medium, making manual handling too heavy. Before handling, the purging device 24 and the hydraulic check valve 5 are opened, and compressed air is used to blow the medium in the pipeline and the automotive suspension test piece 30 back to the high-temperature medium tank 6, reducing residual liquid in the sample. The function of the purging check valve 23 is to prevent the medium in the pipeline from crossing to the air path side.

[0031] like Figures 2 to 4 As shown, the vibration rotation mechanism includes a vibration support 12, a rotation platform 32, a vibration cylinder 11, a rotation drive motor 14, a transmission assembly, and a rotation output shaft 33. The top of the vibration support 12 is provided with multiple guide grooves 13. Multiple sets of guide wheels 15 are connected around the rotation platform 32, and each set of guide wheels 15 slides in cooperation with each guide groove 13. The vibration cylinder 11 is mounted on the vibration support 12, and the output end of the vibration cylinder 11 is connected to the rotation platform 32. At least one rotation output shaft 33 is movably connected to the rotation platform 32. The rotation drive motor 14 is mounted on the rotation platform 32 and is connected to at least one rotation output shaft 33 through the transmission assembly. The test fixture 29 is fixed on the rotation output shaft 33.

[0032] The vibration bracket 12 is fixed to the ground to support the entire device. The rotating platform 32 can move vertically on top of the vibration bracket 12. Driven by the vibration cylinder 11, the rotating platform 32 can move up and down. The rotating output shaft 33 is connected to the rotating platform 32, thereby driving the automotive suspension test fixture 29 on the rotating output shaft 33 to perform the up-and-down vibration test process. The rotating drive assembly and transmission assembly are mounted on the rotating platform 32. While moving up and down with the rotating platform 32, the rotating drive assembly can drive the rotating output shaft 33 to rotate through the transmission assembly, thereby driving the automotive suspension test fixture 29 to rotate synchronously, realizing the rotational motion test.

[0033] The rotating platform 32, through the cooperation of multiple sets of guide wheels 15 and multiple guide grooves 13, ensures that the rotating platform 32 does not deviate or jam during vertical vibration, and that its motion trajectory is stable and reliable. By using rolling friction instead of sliding friction, the frictional force is significantly reduced, effectively reducing the drive load, reducing energy loss, and improving the operating efficiency of the device.

[0034] The transmission assembly includes an output gear 34, a double-sided rack 16, a rotating shaft gear 17, a rack slide rail 35, and a rack slider 36. The output gear 34 is connected to the output end of the rotary drive motor 14. The double-sided rack 16 is movably connected to the rotary platform 32. The rotating shaft gear 17 is connected to the rotary output shaft 33. One side of the double-sided rack 16 meshes with the output gear 34, and the other side of the double-sided rack 16 meshes with at least one rotating shaft gear 17. The rack slide rail 35 is connected to the two end regions of one side of the double-sided rack 16. The rack slider 36 is connected to the rotary platform 32, and the rack slide rail 35 and the rack slider 36 are in sliding engagement. The rotary drive motor 14 drives the double-sided rack 16 to reciprocate along its axial direction through the output gear 34.

[0035] The servo motor drives the output gear 34 to rotate in both directions, and through gear meshing, drives the double-sided rack 16 to reciprocate along its axial direction; at least one rotating shaft gear 17 is synchronously meshed on the other side of the double-sided rack 16, thereby driving each rotating shaft gear 17 to reciprocate synchronously; the rotating shaft gear 17 is coaxially and fixedly connected to the rotary output shaft 33, and finally drives the car suspension test fixture 29 mounted on the rotary output shaft 33 to reciprocate synchronously.

[0036] The rack and pinion slide rail 35 and rack and pinion slider 36 guide and limit the double-sided rack 16, which can accurately limit the movement direction and position of the double-sided rack 16, ensuring that the double-sided rack 16 does not deviate or wobble during reciprocating movement. This ensures that the double-sided rack 16 and the gears on both sides are always stably meshed, without tooth disengagement or jamming, making the transmission smoother and more reliable. At the same time, it can ensure that the power is stably transmitted along the set direction, efficiently drive the gear to achieve precise reciprocating rotation, and improve the transmission accuracy and operational stability.

[0037] The two ends of the rotary output shaft 33 are rotatably connected to the rotary platform 32 via bearings. This ensures that the rotary output shaft 33 is mounted on the rotary platform 32 while also being able to rotate relative to the rotary platform 32, thereby enabling rotational testing of the automotive suspension testing fixture 29.

[0038] The vibration rotation mechanism also includes position sensors 37 and sensing plates 38. Multiple position sensors 37 are mounted on the rotating platform 32 and located on one side of the double-sided rack 16. The sensing plates 38 are mounted on the double-sided rack 16. The sensing plates 38 move between the multiple position sensors 37 along with the double-sided rack 16. When the sensing plates 38 move to align with the position sensors 37, a sensing occurs.

[0039] In this embodiment, three position sensors 37 are preferably arranged side by side. The position sensors 37 at both ends are used to detect the extreme positions of the reciprocating movement of the double-sided rack 16. When the sensing plate 38 moves into the sensing area of ​​the position sensors 37 at both ends, the position sensors 37 send a feedback signal to control the servo motor to stop rotating in the current direction and reverse direction. The position sensor 37 in the middle is used to determine whether the double-sided rack 16 is in the center position. When the sensing plate 38 enters the sensing area of ​​the middle position sensor 37, the position sensor 37 sends a feedback signal indicating that the double-sided rack 16 has returned to the center position.

[0040] like Figure 1 As shown, the automotive suspension pipeline testing system also includes a hydraulic power source 1, a power source pressure gauge 2, and a hydraulic output cylinder 19. The hydraulic power source 1 is connected to the hydraulic chamber of the booster cylinder 20 and the vibration cylinder 11 through the hydraulic output cylinder 19. The hydraulic power source 1 is connected to the hydraulic control check valve 5, and the power source pressure gauge 2 is connected to the hydraulic power source 1.

[0041] Figure 1 The dotted line in the pipeline indicates the flow direction of the hydraulic power source 1. The piston in the booster cylinder 20 moves left and right, the vibration cylinder 11 moves up and down, and the hydraulic control check valve 5 requires power to open and close.

[0042] Hydraulic output cylinder 19 is a servo valve that can change the direction of pressure flow. The reciprocating motion of booster cylinder 20 requires pressure to move. The pressure from hydraulic power source 1 primarily provides the power for the reciprocating movement of booster cylinder 20. The hydraulic chamber of booster cylinder 20 has two regions. When the cylinder needs to move forward, hydraulic output cylinder 19 connects the left region of the booster cylinder 20's hydraulic chamber, while the right region connects back to hydraulic output cylinder 19. When the pressure in the left region of booster cylinder 20 is greater than the pressure in the right region, the cylinder moves forward; conversely, it retracts, thus achieving the pressurization or depressurization of the medium within the medium chamber of booster cylinder 20.

[0043] During pressure pulse testing, the pilot-operated check valve 5 closes, and the booster cylinder 20 moves forward, building up pressure to reach the test pressure. There is a solenoid valve between the pilot-operated check valve 5 and the hydraulic power source 1. Normally, the hydraulic power source 1 maintains a constant pressure. When the pilot-operated check valve 5 needs to open, the solenoid valve opens, and the pressure from the hydraulic power source 1 is transmitted to the pilot-operated check valve 5, pushing it open. When the pilot-operated check valve 5 needs to close, the solenoid valve disconnects, simultaneously releasing the pressure in the pipeline between the solenoid valve and the pilot-operated check valve 5, thus closing the check valve.

[0044] Operating procedures for this automotive suspension piping testing system: (1) Media system: a1. Start the hydraulic power source 1, adjust the output pressure of the hydraulic output cylinder 19, observe the position indicated by the power source pressure gauge 2, and stabilize the pressure within a certain range; a2. Add the test medium into the high temperature medium tank 6. The medium tank is equipped with a heating wire to heat the medium. Connect the automobile suspension test piece 30 into the environmental chamber 18 and install the test fixture 29. Open the medium outlet valve 4, start the medium circulation pump 21, and open the hydraulic control check valve 5 to replace the air in the system pipeline (solid line pipeline part). a3. Close the hydraulic control check valve 5, start the booster cylinder 20, the booster cylinder 20 reciprocates, calculate the reciprocating rate (the reciprocating rate is the displacement frequency of the booster cylinder 20 output, for example, the pressure pulse running frequency of 1Hz is equivalent to the cylinder's forward and backward movement time of 1 second), the medium pressure sensor 27 detects the real-time pressure of the system pipeline, and the medium temperature sensor 28 detects the real-time temperature of the system pipeline.

[0045] (2) Vibration system: b1. Start the hydraulic power source 1, adjust the output pressure of the hydraulic output cylinder 19, observe the pressure gauge reading, and stabilize the pressure within a certain range; b2. The base of the vibration bracket 12 is fixed on the ground. The output shaft of the vibration cylinder 11 is connected to the rotating platform 32. The rotating output shaft 33 on the rotating platform 32 is connected to the tooling inside the environmental chamber 18. The vibration displacement is set, and the vibration cylinder 11 is run so that the vibration cylinder 11 drives the test tooling 29 inside the environmental chamber 18 to move up and down reciprocatingly. b3. The rotary drive motor 14 is mounted on the rotary platform 32. The output gear 34 of the rotary drive motor 14 is engaged with the double-sided rack 16. The other side of the double-sided rack 16 is engaged with the rotating shaft gear 17. The output shaft of the rotating shaft gear 17 drives the test fixture 29 in the environmental chamber 18 to move together. The rotation angle is set, the rotary drive motor 14 is started, and the rotary drive motor 14 controls the output angle, driving one end of the automobile suspension test piece 30 in the environmental chamber 18 to rotate together.

[0046] b4. Up-and-down vibration and rotational motion can operate simultaneously or independently.

[0047] (3) Media recovery: c1. When the test is over, if the pipeline is normal, the hydraulic check valve 5 and the purging device 24 can be opened to purge the medium liquid in the automobile suspension test piece 30 back to the medium tank. c2. If the automotive suspension test piece 30 fails during the test, and the medium is sprayed into the environmental chamber 18, it can be recovered to the waste liquid tank 10 through the leakage box 31 at the bottom of the environmental chamber 18. The waste liquid tank 10 has high and low level floats. When a high level is detected, the medium recovery pump 7 is started to filter the medium in the waste liquid tank 10 and pump it back to the high-temperature medium tank 6. When a low level signal is detected, the medium recovery pump 7 stops working.

[0048] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A vehicle suspension piping testing system, characterized in that, The system includes an environmental chamber, a vibration rotation mechanism, and a medium pressure mechanism. The medium pressure mechanism includes a high-temperature medium tank, a medium outlet valve, a medium circulation pump, a one-way valve, a booster cylinder, and a hydraulically controlled one-way valve. The automotive suspension test piece is located inside the environmental chamber. Test fixtures are installed at both ends of the automotive suspension test piece. The output end of the vibration rotation mechanism extends into the environmental chamber and is connected to the test fixtures of the automotive suspension test piece. The output end of the high-temperature medium tank, the one-way valve, the medium circulation pump, the medium chamber of the booster cylinder, and the test fixtures at one end of the automotive suspension test piece are sequentially connected in one direction through pipelines. After forming a one-way passage through the interior of the automotive suspension, the test fixtures at the other end of the automotive suspension test piece, the hydraulically controlled one-way valve, and the high-temperature medium tank are sequentially connected in one direction through pipelines.

2. The automotive suspension piping testing system according to claim 1, characterized in that, The medium pressure mechanism also includes a medium pressure sensor and a medium temperature sensor, which are respectively connected to the pipeline.

3. The automotive suspension piping testing system according to claim 1, characterized in that, The medium pressure mechanism also includes a pressure shut-off valve and a medium pressure gauge, the medium pressure gauge being connected to the pipeline via the pressure shut-off valve.

4. The automotive suspension piping testing system according to claim 1, characterized in that, The medium pressure mechanism also includes a liquid outlet filter, which is installed on the pipeline between the medium outlet valve and the medium circulation pump.

5. The automotive suspension piping testing system according to claim 1, characterized in that, The medium pressure mechanism also includes a waste liquid tank, a ball valve, a waste liquid filter, and a medium recovery pump. The bottom of the environmental tank is equipped with a leakage box. The leakage box, waste liquid tank, ball valve, waste liquid filter, medium recovery pump, and high-temperature medium tank are sequentially connected in one direction through pipelines.

6. The automotive suspension piping testing system according to claim 1, characterized in that, The medium pressure mechanism also includes a purging device and a purging check valve, wherein the purging device is connected to the pipeline through the purging check valve.

7. The automotive suspension piping testing system according to claim 1, characterized in that, The vibration rotation mechanism includes a vibration support, a rotating platform, a vibration cylinder, a rotation drive motor, a transmission assembly, and a rotation output shaft. The top of the vibration support is provided with multiple guide grooves, and multiple sets of guide wheels are connected around the rotating platform. Each set of guide wheels slides into each guide groove. The vibration cylinder is mounted on the vibration support, and the output end of the vibration cylinder is connected to the rotating platform. At least one rotation output shaft is movably connected to the rotating platform. The rotation drive motor is mounted on the rotating platform and is connected to at least one rotation output shaft through the transmission assembly. The test fixture is fixed on the rotation output shaft.

8. The automotive suspension piping testing system according to claim 7, characterized in that, The transmission assembly includes an output gear, a double-sided rack, a rotating shaft gear, a rack slide rail, and a rack slider. The output gear is connected to the output end of a rotary drive motor. The double-sided rack is movably connected to a rotating platform. The rotating shaft gear is connected to a rotary output shaft. One side of the double-sided rack meshes with the output gear, and the other side meshes with at least one rotating shaft gear. The rack slide rail is connected to both ends of one side of the double-sided rack. The rack slider is connected to the rotating platform, and the rack slide rail and rack slider slide in a sliding engagement. The rotary drive motor drives the double-sided rack to reciprocate along its axial direction via the output gear.

9. The automotive suspension piping testing system according to claim 8, characterized in that, The vibration rotation mechanism also includes position sensors and sensing plates. Multiple position sensors are mounted on the rotation platform and located on one side of the double-sided rack. The sensing plates are mounted on the double-sided rack and move between multiple position sensors along with the double-sided rack. Sensing occurs when the sensing plate moves to align with a position sensor.

10. The automotive suspension piping testing system according to claim 7, characterized in that, It also includes a hydraulic power source, a hydraulic output cylinder, and a power source pressure gauge. The hydraulic power source is connected to the hydraulic chamber of the booster cylinder and the vibration cylinder through the hydraulic output cylinder. The hydraulic power source is connected to a hydraulic control check valve, and the power source pressure gauge is connected to the hydraulic power source.

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