A test device and test method for simulating intelligent control of train body height

Abstract

The present invention's test device for simulating intelligent train body height control includes a fixed unit and a test unit. The fixed unit simulates a rail vehicle body, with an air spring mounted within the fixed unit. The fixed units are mounted at the upper and lower ends of the air spring to clamp and secure the air spring to be tested. The test unit includes a loading device, an air intake and exhaust device, a secondary suspension system, a sensing device, and a control device. The sensing device is located within the air spring and measures changes in the air spring's height through the sensing device and provides feedback to the control device. Based on the air spring height changes measured by the sensing device, the control device controls the opening and closing of the air intake and exhaust solenoid valves to inflate and exhaust the air spring, thereby changing the air spring's height. This allows for the detection and study of the impact of the secondary suspension system on the internal pressure of the air spring required for height adjustment, providing data reference for actual vehicle body manufacturing.

Description

Technical Field

[0001] The invention relates to a test device and a test method for simulating intelligent control of train body height, and belongs to the field of train system experimental devices. Background Art

[0002] As a core component of a subway train's secondary suspension system, air springs significantly impact the train's smoothness, ride comfort, and safety. By precisely regulating internal air pressure, air springs effectively dampen vibrations and shocks generated during travel, ensuring a stable interior environment and optimizing the passenger experience.

[0003] From a safety perspective, air springs can adjust their load distribution according to the dynamic changes in the train's load, maintaining a stable driving posture under complex operating conditions and effectively reducing safety risks caused by center of gravity shifts. Furthermore, during emergency braking or unexpected situations, the air spring's rapid response provides additional stability and enhances the train's overall safety.

[0004] In summary, the use of air springs in subway trains not only improves ride comfort but also plays a vital role in ensuring train safety. However, existing train air springs can only be adjusted in small increments and cannot be adjusted to align the train floor height with the platform height.

[0005] A search revealed that document 202210059661.6 discloses a real-time adjustment system for the air springs of a rail vehicle suspension. The system comprises multiple carriages, each with an articulated structure between adjacent carriages. Air suspension and roll angle sensors are installed at the lower ends of the carriages, and height sensors are installed on both sides of the carriages. Signal transmission lines for the roll angle and height sensors are connected to the signal input terminals of a single-chip microcomputer, respectively, while the air suspension control lines are connected to the signal input and output terminals of the single-chip microcomputer. When the vehicle stops at a platform, the air springs of all air suspension systems on the side closest to the platform are deflated or inflated, causing the carriages to roll slightly, facilitating passenger boarding and alighting. This design, which incorporates height sensors on both sides of the carriages, does not address the linkage between the air spring's lifting height and the desired vehicle height. Conventional height adjustment methods, due to spatial constraints caused by the connections to other components in the system, cannot achieve the desired height for extraordinary height adjustment. Furthermore, other interfering factors, such as varying passenger weights and the internal pressure applied to the air springs, are not considered in the prior art.

[0006] Most existing air spring height adjustment experiments are just concepts. It's crucial to develop a practical test device that simulates the intelligent height adjustment of a train body, simulates the actual height adjustment needs of a train, and considers the impact of various interference factors on the air spring, such as platform height and passenger boarding and alighting. It's crucial to invent a test device that can provide reliable test data for engineering applications of intelligent height adjustment of air springs. Summary of the Invention

[0007] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a test device for simulating the intelligent control of the train body height. By scientifically coordinating the test unit and the fixing unit with the air spring, not only can the height of the air spring be accurately controlled, but also by rationally configuring the loading device, the air intake and exhaust device, the secondary suspension device and the control device, the space can be utilized to the maximum extent, the interference factors in the air spring height adjustment process can be controlled, and the extraordinary height adjustment operation can be achieved, which is more suitable for use in different situations. At the same time, it can improve the riding comfort of passengers and ensure the safety and stability of train operation.

[0008] The test device for intelligently controlling the height of a simulated train body of the present invention arranges a sensing device inside an air spring. The sensing device cooperates with a control device to more accurately control the raising and lowering of the air spring, thereby realizing simulated body height adjustment.

[0009] In order to achieve the above object, the present invention proposes the following technical solutions:

[0010] A test device for simulating intelligent height control of a train body is disclosed. The device comprises a fixed unit and a test unit. The fixed unit simulates a rail vehicle body, and an air spring is installed within the fixed unit. The fixed unit is mounted at the upper and lower ends of the air spring to clamp and secure the air spring to be tested. The test unit comprises a loading device, an air intake and exhaust device, a secondary suspension device, a sensing device, and a control device. The sensing device is located within the air spring and measures the air spring height through the sensing device and provides feedback to the control device. The control device controls the opening and closing of the air intake and exhaust solenoid valves based on the air spring height change measured by the sensing device to inflate and exhaust the air spring, thereby changing the air spring height. During the air spring height change, the secondary suspension device generates resistance against the fixed unit, causing changes in the internal pressure of the air spring. The pressure change during the air spring height change is measured by a pressure sensor installed within the air spring. In order to detect and study the influence of the secondary suspension device on the internal pressure of the air spring required for height adjustment, a data reference is provided for actual vehicle body manufacturing; the control device controls the air intake and exhaust device according to the height to realize the inflation and exhaust of the air spring, thereby raising or lowering the height of the air spring. The fixed unit connected to the air spring changes with the height of the air spring, driving the secondary suspension device installed on the fixed unit to rise and fall synchronously.

[0011] The test device for simulating intelligent control of train body height of the present invention focuses on simulating a train, simulating the fixed unit as a vehicle body, which can not only fix the air spring to be tested, but also serves as the overall framework of the test device, effectively combining various devices into one, taking into account the simulation of structures that may affect the lifting and lowering of the air spring, and providing a reliable reference for how much internal pressure needs to be added to the air spring for the actual height adjustment of the train. In addition, the secondary suspension device is arranged between the fixed devices, which can effectively simulate various situations such as the transmission and torsion of the train body. The sensing device is arranged inside the air spring, which makes it easier to find the test surface and provides more accurate feedback on the lifting and lowering height of the air spring, so as to more accurately test the changes in the lifting and lowering of the entire train body.

[0012] Furthermore, the air springs are arranged in pairs, placed on either side of the fixed unit. The fixed unit includes upper and lower clamping devices at the upper and lower ends of the air springs. An H-shaped connecting frame is mounted on one side of the upper clamping device, and the air intake and exhaust system and secondary suspension system are mounted on the H-shaped connecting frame to connect the air springs and the test unit. The paired air springs allow for simultaneous adjustment of the air springs' inflation and deflation, raising and lowering the entire vehicle frame. They can also be inflated on one side and deflated on the other, tilting the frame and providing test data and reference for adjusting the vehicle's floor and platform height upon arrival.

[0013] Furthermore, the loading device includes a cylinder mounted on the H-shaped connecting frame, which provides vertical loading to the air spring. The loading load can be adjusted to simulate vehicles of different specifications. The cylinder is preferably a dual-channel vertical hydraulic cylinder that simulates the vertical load of the vehicle body. The cylinder applies vertical loading to the air spring to simulate the weight of the actual vehicle body, making the test data more reliable.

[0014] Furthermore, a central traction device is provided between the paired air springs. The central traction device includes a traction pin seat and traction rods provided on both sides of the traction pin seat. The center of the traction pin seat is fixedly connected to the H-shaped connecting frame.

[0015] Furthermore, the upper clamping device includes a first top plate and a first bottom plate, and a first support body connecting the two. A placement cavity is formed between the top and bottom plates. The air intake and exhaust device is mounted on top of the air spring through the placement cavity. The lower clamping device includes a second top plate and a second bottom plate, and a second support body connecting the two. The second top plate and the second bottom plate respectively contact and mate with the upper and lower ends of the air spring. Both the upper and lower clamping devices are provided with cavities, within which the air intake and exhaust device and the air pipeline can be installed, reducing interference between the various structures and ensuring more accurate test results.

[0016] Furthermore, the edge of the top plate 1 is provided with a mounting wing plate 1 with a protruding edge, and the edge of the bottom plate 2 is provided with a mounting wing plate 2 with a protruding edge; the wing plate 1 and the wing plate 2 are arranged opposite to each other for installing a vertical shock absorber, and the stretching direction of the vertical shock absorber is consistent with the height adjustment direction of the air spring.

[0017] Furthermore, the H-shaped connecting frame includes two parallel side beams and a cross beam connecting the side beams and perpendicular to the side beams. An anti-roll torsion bar is provided on one side of the lower clamping device. The anti-roll torsion bar includes a torsion bar shaft consistent with the extension direction of the side beam. Symmetrical torsion arms are provided at both ends of the torsion bar shaft. The end of the torsion arm is connected to one end of the vertical connecting rod, and the other end of the vertical connecting rod is fixedly connected to the side beam.

[0018] Furthermore, the air spring includes an airbag, an airbag cavity enclosed by an upper cover plate and a pressure plate, an auxiliary spring is installed at the lower end of the pressure plate, and the auxiliary spring includes a centrally arranged core shaft, and an inner groove body is provided at the center of the core shaft close to the pressure plate for installing a displacement sensor; an accommodating space is provided at the center of the core shaft on the side away from the pressure plate to accommodate the signal transmission line of the displacement sensor; a sealing device is provided circumferentially of the displacement sensor.

[0019] For practical reasons, this test setup features a sensing device located within the mandrel at the base of the air spring, making it easier to locate the test surface. The displacement sensor is preferably a high-pressure-resistant ultrasonic sensor, which converts ultrasonic signals into other energy signals (usually electrical signals). These sensors exploit the physical properties of ultrasound, such as high-frequency vibration and excellent directionality, to detect and measure the distance of objects. This sensor operates by transmitting sound waves of a specific frequency. When the sound waves reflect off an object, the sensor receives the reflected sound waves and determines the distance between the object and the sensor by calculating the time difference between the transmission and reception of the sound waves. Because the ultrasonic sensor is connected to the air spring's bellows, a high-pressure-resistant ultrasonic sensor is selected for reliability and durability. This allows for more accurate feedback of the air spring's lift height, even under the high pressures inside the air spring. This allows for a maximum lift height exceeding 150 mm and accurate vehicle height measurement at a maximum tilt angle of 10 degrees.

[0020] Furthermore, the oil cylinder is provided with a displacement sensor and a force sensor. During the process of simulating the lifting and lowering of the vehicle body, the displacement and force during the test can be measured in real time through the sensors.

[0021] Another object of the present invention is to disclose a test method for the above-mentioned test device for simulating intelligent control of train body height, wherein a pair of air springs are installed in a fixed unit and connected to an air intake and exhaust device, and the control device controls the opening and closing of the air intake and exhaust device by sensing the height of the air spring to adjust the height of the air spring; at the same time, the central traction device, anti-roll torsion bar, and vertical shock absorber are adjusted and driven by the H-shaped connecting frame to obtain the changes in the internal pressure of the air spring caused by the central traction device, anti-roll torsion bar, and vertical shock absorber during the height adjustment process.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This test device for simulating intelligent control of train body height can not only precisely control the height of the air spring by scientifically combining the test unit and the fixing unit with the air spring, but also maximizes space utilization by rationally configuring the loading device, air intake and exhaust device, secondary suspension device and control device, making interference during the air spring height adjustment process controllable and enabling extraordinary height adjustment operations. It is more suitable for use in different situations, while improving passenger comfort and ensuring the safety and stability of train operation.

[0024] At the same time, the test device for simulating the intelligent control of the height of a train body of the present invention focuses on simulating a train, simulating the fixed unit as a vehicle body, which can not only fix the air spring to be tested, but also serves as the overall framework of the test device. It can effectively combine the various partial devices into one, taking into account the simulation of structures that may affect the lifting and lowering of the air spring, so as to provide a reliable reference for how much internal pressure needs to be added to the air spring for the actual height adjustment of the train. In addition, the secondary suspension device is arranged between the fixed devices, which can effectively simulate various situations such as the transmission and torsion of the train body. The sensing device is arranged inside the air spring, which makes it easier to find the test surface and provides more accurate feedback on the lifting height of the air spring, so as to more accurately test the changes in the lifting and lowering of the entire train body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of the test device for simulating intelligent control of train body height according to the present invention.

[0026] Figure 2 This is a schematic diagram of the overall structure of another direction of the test device for simulating intelligent control of train body height according to the present invention.

[0027] Figure 3 This is an internal cross-sectional view of the air spring and auxiliary spring of the present invention.

[0028] Explanation of reference numerals: 1-oil cylinder, 2-H-type connecting frame, 21-lower clamping device, 22-upper clamping device, 211-top plate 2, 212-bottom plate 2, 213-support body 2, 221-top plate 1, 222-bottom plate 1, 223-support body 1, 2211-mounting wing plate 1, 2121-mounting wing plate 2, 23-cross beam, 24-side beam, 3-air spring, 31-air bag, 32-upper cover plate, 33-pressure plate, 34-wear plate, 35- Rubber, 36-air guide tube, 37-accommodation space, 38-signal transmission line, 39-signal transmission cavity, 4-vertical shock absorber, 5-center traction device, 51-traction pin seat, 52-traction rod, 53-stud, 6-anti-roll torsion bar, 61-torsion bar shaft, 62-torsion arm, 7-intake and exhaust device, 8-vertical connecting rod, 9-auxiliary spring, 91-core shaft, 92-inner groove body, 100-displacement sensor, 200-sealing device, 300-base. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 3 The present invention is described in further detail. Example 1

[0030] like Figure 1-Figure 3As shown, the test device for simulating intelligent height control of a train body in this embodiment integrates a fixed unit and a test unit to simulate actual operating conditions. The fixed unit is used to simulate a rail vehicle body. An air spring 3 is installed within the fixed unit. The fixed units are mounted at the upper and lower ends of the air spring 3 to clamp and secure the air spring 3 to be tested. The test unit includes a loading device, an air intake and exhaust device 7, secondary suspension devices (such as vertical shock absorbers, a center traction device, and an anti-roll torsion bar), a sensing device, and a control device. The sensing device is located within the air spring 3 and measures the height of the air spring 3. The sensing device measures the height of the air spring 3 and provides feedback to the control device to detect the impact of the secondary suspension devices on the internal pressure of the air spring 3 required for height adjustment, providing data reference for actual vehicle body manufacturing. The control device controls the air intake and exhaust device 7 based on the height, inflating and deflating the air spring 3, thereby raising or lowering the height of the air spring 3. The fixed unit connected to the air spring 3 changes with the height of the air spring 3, driving the secondary suspension devices mounted on the fixed unit to rise and fall synchronously. This test device comprehensively considers the influencing factors of the secondary suspension system. In order to examine the influence of each component on the lifting and lowering of the air spring, both the loading device and the secondary suspension device are taken into consideration.

[0031] The secondary suspension creates resistance against the fixed unit during height changes in the air spring, causing changes in the internal pressure of the air spring. This pressure change is measured by installing a pressure sensor inside the air spring. This allows for the study of the secondary suspension's effect on the internal pressure of the air spring required for height adjustment, providing data reference for actual vehicle manufacturing.

[0032] The control device (not shown) is mainly used to control the opening and closing of the intake and exhaust device 7, and can achieve the above functions. The control program of the control device is set, and the solenoid valve of the air inlet of the intake and exhaust device 7 is opened or closed by the program to perform inflation or exhaust.

[0033] Specifically, the loading device includes a cylinder 1 mounted on an H-shaped connecting frame 2, which provides vertical loading to the air spring 3. The loading load can be adjusted to simulate different vehicle specifications. The cylinder is preferably a dual-channel vertical hydraulic cylinder designed to simulate the vertical load of the vehicle body. Vertical loading of the air spring 3 via cylinder 1 simulates the weight of the actual vehicle body, making the test data more reliable. Cylinder 1 is equipped with a displacement sensor and a force sensor to measure displacement and force in real time during the simulated vehicle lifting and lowering process.

[0034] The air springs 3 in this embodiment are arranged in pairs, placed on both sides of the fixed unit. The fixed unit includes an upper clamping device 22 and a lower clamping device 21, which are arranged at the upper and lower ends of the air spring 3. An H-shaped connecting frame 2 is installed on one side of the upper clamping device 22. The H-shaped connecting frame 2 is mounted on the air intake and exhaust device 7 and the secondary suspension device to link the air springs 3 and the test unit on both sides. The upper clamping device 22 includes a top plate 221 and a bottom plate 222, and a support body 223 connecting the top plate 221 and the bottom plate 222. A placement cavity is formed between the top plate 221 and the bottom plate 222. The air intake and exhaust device 7 is installed on the top of the air spring 3 through the placement cavity. The lower clamping device 21 includes a top plate 211 and a bottom plate 212, and a support body 213 connecting the top plate 211 and the bottom plate 212. The top plate 211 and the bottom plate 212 respectively contact and cooperate with the upper and lower ends of the air spring 3. The air springs 3 are arranged in pairs to simultaneously adjust the inflation and exhaust of the air springs, achieving the lifting and lowering of the entire frame; they can also be operated to inflate on one side and exhaust on the other side, causing the frame to tilt, providing test data and reference for adjusting the height of the vehicle floor and platform when the vehicle arrives at the station. The H-shaped connecting frame 2 includes two parallel side beams 24 and a crossbeam 23 connecting the side beams 24 and perpendicular to the side beams. An anti-roll torsion bar 6 is provided on one side of the lower clamping device 21. The anti-roll torsion bar 6 includes a torsion bar shaft 61 extending in the same direction as the side beam 24. Symmetrical torsion arms 62 are provided at both ends of the torsion bar shaft 61. The end of the torsion arm 62 is connected to one end of the vertical link 8, and the other end of the vertical link 8 is fixedly connected to the side beam 24.

[0035] A central traction device 5 is installed between the paired air springs 3. This device includes a traction pin holder 51 and traction rods 52 positioned on either side of the pin holder 51. The pin holder 5 is fixedly connected to the H-shaped connecting frame 2. In this embodiment, a pair of central traction mounting plates are symmetrically positioned on the front and rear sides of the H-shaped connecting frame 2. These plates are in the shape of an inverted T. The inner side of the plates houses a pin holder for the traction rods 52, while the outer side includes a vertical reinforcement plate to ensure the stability of the entire traction device 5. The pin holder 51 is detachably connected to the crossbeam 23 of the H-shaped connecting frame 2 via studs 53. When the air springs are inflated, the upper clamping device 22 rises with the air springs, and the crossbeam 23 drives the traction device 5 in synchronous motion. This simulates the actual operating conditions of a train body, allowing for testing the required air pressure within the air springs 3 from the intake and exhaust systems 7 to achieve the desired height.

[0036] The edge of the top plate 221 is provided with a mounting wing plate 1 2211 with a protruding edge, and the edge of the bottom plate 2 212 is provided with a mounting wing plate 2 2121 with a protruding edge; the mounting wing plate 1 2211 and the mounting wing plate 2 2121 are arranged opposite to each other and are used to install the vertical shock absorber 4, and the stretching direction of the vertical shock absorber 4 is consistent with the height adjustment direction of the air spring 3.

[0037] In this embodiment, the air spring 3 comprises an airbag 31, an upper cover plate 32, and a pressure plate 33, enclosing an airbag cavity. An auxiliary spring 9 is mounted at the lower end of the pressure plate 33 and is mounted on a base 300. The auxiliary spring 9 comprises a centrally located core shaft 91 and a rubber member 35 surrounding the core shaft. The core shaft 91 is a frustum-shaped structure with an inner groove 92 located near the pressure plate for mounting a displacement sensor 100. A plenum 37 is located in the center of the core shaft 91, away from the pressure plate 33, to accommodate the signal transmission line 102 of the displacement sensor 100. A sealing device 200 is provided around the displacement sensor 100. An air duct 36 is mounted on the upper cover plate 32, connecting it to the intake and exhaust device 7, which is an intake duct controlled by a solenoid valve. A wear plate 34 is mounted on the top of the pressure plate 33. In this embodiment, a signal transmission cavity 39 is located between the pressure plate 33 and the wear plate 34, allowing the signal from the displacement sensor 100 to pass through. A signal transmission line 38 is provided at the bottom of the displacement sensor 100 and is placed within the accommodation space 37. The accommodation space 37 not only serves as a storage space but also serves as a weight-reducing hole. The ultrasonic sensor 100 is preferably a high-pressure-resistant ultrasonic sensor. This sensor converts ultrasonic signals into other energy signals (typically electrical signals). It utilizes the physical properties of ultrasound, such as high-frequency vibration and good directionality, to detect and measure the distance of objects. This sensor operates by transmitting sound waves of a specific frequency. When the sound waves hit an object and reflect back, the sensor receives the reflected sound waves and determines the distance between the object and the sensor by calculating the time difference between the transmission and reception of the sound waves. Because the ultrasonic sensor is connected to the air spring's airbag, a high-pressure-resistant ultrasonic sensor is selected for reliability and durability. This allows for more accurate feedback of the air spring's lift height, enabling a maximum lift height of over 150 mm and accurate measurement of vehicle height changes at a maximum tilt angle of 10 degrees.

[0038] In order to better study the changes in the internal pressure of the air spring during the intelligent height control of rail vehicles, and the forces exerted by the vertical shock absorber 4, the anti-roll torsion bar 6, and the central traction device 5 on the vehicle body during adjustment, a test fixture for simulating intelligent height control of the vehicle body was designed. The test device for simulating intelligent height control of a train body of the present invention focuses on simulating a train, simulating the fixed unit as a vehicle body. This not only fixes the air spring to be tested, but also serves as the overall framework of the test device, effectively integrating the various components into one. The simulation takes into account all structures that may affect the lifting and lowering of the air spring, providing a reliable reference for how much internal pressure needs to be increased in the air spring for actual height adjustment of the train. In addition, the secondary suspension device is arranged between the fixed devices, which can effectively simulate various conditions such as transmission and torsion of the train body. The sensing device is arranged inside the air spring, which makes it easier to find the test surface and provides more accurate feedback on the lifting and lowering height of the air spring, so as to more accurately test the changes in the lifting and lowering of the entire train body.

[0039] The test method of the test device for simulating intelligent control of train body height in this embodiment is as follows: a pair of air springs 3 are installed in a fixed unit, and the air intake and exhaust devices are connected. By sensing the height of the air springs 3, the control device controls the opening and closing of the air intake and exhaust devices to adjust the height of the air springs 3; at the same time, the center traction device 5, the anti-roll torsion bar 6, and the vertical shock absorber 4 are driven by the H-type connection two frames to adjust the height changes.

[0040] At the same time, the central traction device or vertical shock absorber and other structures installed on the fixed device can be disassembled according to actual needs, so that the design of test plans under different working conditions can be realized, which is more applicable.

[0041] The above embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments of the present invention as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A test device for simulating intelligent control of train body height, characterized in that: The invention comprises a fixing unit and a test unit, wherein the fixing unit is used to simulate a rail vehicle body, an air spring (3) is installed in the fixing unit, and the fixing unit is installed at the upper and lower ends of the air spring (3) to clamp and fix the air spring (3) to be tested; the test unit comprises a loading device, an air intake and exhaust device (7), a secondary suspension device, a sensing device and a control device; the secondary suspension device comprises a vertical shock absorber (4), a central traction device (5) and an anti-roll torsion bar (6); the sensing device is arranged inside the air spring (3), and the height of the air spring (3) is measured by the sensing device and fed back to the control device; the control device controls the solenoid valve switch of the air intake and exhaust device according to the change of the air spring height measured by the sensing device to realize the inflation and exhaust of the air spring, thereby changing the height of the air spring; the secondary suspension device generates a resistance effect on the fixing unit during the change of the air spring height, thereby causing the internal pressure of the air spring to change; The air springs (3) are arranged in pairs and are placed on both sides of the fixing unit; the fixing unit includes an upper clamping device (22) and a lower clamping device (21) arranged at the upper and lower ends of the air spring (3); an H-shaped connecting frame (2) is installed on one side of the upper clamping device (22); an air intake and exhaust device and a secondary suspension device are installed on the H-shaped connecting frame (2) to link the air springs (3) and the test unit on both sides; A central traction device (5) is provided between the paired air springs (3), the central traction device (5) comprising a traction pin seat (51) and traction rods (52) provided on both sides of the traction pin seat (51), the center of the traction pin seat (51) being fixedly connected to the H-shaped connecting frame (2); The upper clamping device (22) includes a top plate 1 (221) and a bottom plate 1 (222), the edge of the top plate 1 (221) is provided with a mounting wing plate 1 (2211) with a protruding edge, and the lower clamping device (21) includes a top plate 2 (211) and a bottom plate 2 (212), the edge of the bottom plate 2 (212) is provided with a mounting wing plate 2 (2121) with a protruding edge; the mounting wing plate 1 (2211) and the mounting wing plate 2 (2121) are arranged relative to each other and are used to install a vertical shock absorber (4), and the stretching direction of the vertical shock absorber (4) is consistent with the height adjustment direction of the air spring (3); The H-shaped connecting frame (2) includes two parallel side beams (24) and a cross beam (23) connecting the side beams (24) and being perpendicular to the side beams. An anti-roll torsion bar (6) is provided on one side of the lower clamping device (21). The anti-roll torsion bar (6) includes a torsion bar shaft (61) extending in the same direction as the side beam (24). Both ends of the torsion bar shaft (61) are provided with symmetrical torsion arms (62). The end of the torsion arm (62) is connected to one end of a vertical connecting rod (8), and the other end of the vertical connecting rod (8) is fixedly connected to the side beam (24).

2. The test device for simulating intelligent control of train body height according to claim 1, characterized in that: The loading device comprises an oil cylinder (1) arranged on an H-shaped connecting frame (2), which provides vertical loading for the air spring and simulates vehicles of different specifications by adjusting the loading load.

3. The test device for simulating intelligent control of train body height according to claim 1, characterized in that: A support body (223) is connected to the top plate (221) and the bottom plate (222), so that a placement cavity is formed between the top plate (221) and the bottom plate (222); the air intake and exhaust device (7) is installed on the top of the air spring (3) through the placement cavity; the lower clamping device (21) also includes a support body (213) connected to the top plate (211) and the bottom plate (212); the top plate (211) and the bottom plate (212) are respectively in contact with the upper and lower ends of the air spring (3).

4. The test device for simulating intelligent control of train body height according to claim 1, characterized in that: The air spring (3) comprises an airbag (31), an upper cover plate (32) and an airbag cavity enclosed by a pressure plate (33); an auxiliary spring (9) is installed at the lower end of the pressure plate (33); the auxiliary spring (9) comprises a centrally arranged core shaft (91); an inner groove body (92) is provided at the center of the core shaft (91) on a side close to the pressure plate for installing a displacement sensor (100); an accommodating space (37) is provided at the center of the core shaft (91) on a side away from the pressure plate (33) to accommodate a signal transmission line (38) of the displacement sensor (100); and a sealing device (200) is provided circumferentially on the displacement sensor (100).

5. The test device for simulating intelligent control of train body height according to claim 2, characterized in that: The oil cylinder (1) is provided with a displacement sensor and a force sensor, which can measure the displacement and force in real time during the test process when simulating the lifting and lowering of the vehicle body.

6. A test method for the test device simulating intelligent height control of a train body according to any one of claims 1 to 5, characterized in that: A pair of air springs (3) are installed in a fixed unit and connected to an air intake and exhaust device (7). By sensing the height of the air spring (3), a control device controls the opening and closing of the air intake and exhaust device (7) according to the sensed height, and adjusts the air spring to reach a target height; at the same time, the central traction device (5), the anti-roll torsion bar (6), and the vertical shock absorber (4) are adjusted and driven by the H-shaped connecting frame to obtain data on the change in the internal pressure of the air spring (3) caused by the central traction device (5), the anti-roll torsion bar (6), and the vertical shock absorber (4) during the height adjustment process.

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