Railway vehicle wheelset fatigue test tool

Abstract

The utility model relates to rail vehicle wheel fatigue test tool technical field, proposes a kind of rail vehicle wheelset fatigue test tool, including iron flat plate mounting seat, power component, wheelset sample component, guide rail support component and wheel testing component, iron flat plate mounting seat upper end surface is fixedly connected power component by screw, wheelset sample component is installed power component side, iron flat plate mounting seat upper end surface is connected guide rail support component by screw, guide rail support component connects wheelset sample component, the utility model is set up guide rail support component, increases support frame, protective wheel frame, guide wheel, strengthens the support point of the equipment's lateral force structure, can simulate the trajectory of rail operation of vehicle wheelset under actual working condition and guarantee the stability of lateral force, so that structure is more stable, and through the combination of multiple support frames and wheelset sample components, fatigue test can be carried out on multiple wheelsets simultaneously, greatly improving the test efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of fatigue testing fixtures for rail vehicle wheels, specifically a fatigue testing fixture for rail vehicle wheelsets. Background Technology

[0002] With the continuous advancement of technology, high-speed trains, with their efficiency and convenience, have become the preferred choice for modern passenger travel. As the only interface between the train and the track, the wheels bear multiple functions, including transmitting traction and braking forces and supporting the weight of the train. During high-speed operation, the wheels need to continuously withstand complex alternating loads and thermomechanical stresses; any minor defect can lead to serious operational safety hazards. Therefore, during the research and development phase, accelerated fatigue tests simulating actual operating conditions must be conducted to comprehensively evaluate the fatigue resistance, structural strength, and manufacturing quality of the wheel materials.

[0003] However, when simulating the axial operation of vehicle wheelsets and track wheels, the publicly available information in the existing technology cannot guarantee the consistency and balanced distribution of axial loading forces. During operation, it can also cause damage to the mechanical structure of the axially loaded and the mechanical structure of the base, posing safety hazards. Furthermore, it is not possible to conduct fatigue tests on multiple sets of wheelsets, resulting in low testing efficiency. Summary of the Invention

[0004] The purpose of this utility model is to provide a fatigue testing fixture for rail vehicle wheelsets to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fatigue testing fixture for rail vehicle wheelsets, comprising a steel plate mounting base, a power assembly, a wheelset sample assembly, a guide rail support assembly, and a wheel testing assembly. The upper end face of the steel plate mounting base is fixedly connected to the power assembly by screws. The wheelset sample assembly is mounted on one side of the power assembly. The upper end face of the steel plate mounting base is connected to the guide rail support assembly by screws. The guide rail support assembly is connected to the wheelset sample assembly. The center of the upper end face of the steel plate mounting base is connected to the wheel testing assembly by screws. The wheel testing assembly and the wheelset sample assembly form a transmission connection.

[0006] Preferably, the power assembly includes a mounting bracket and a motor, the upper end face of the iron plate mounting base is fixedly connected to the mounting bracket by screws, and the upper end face of the mounting bracket is fixedly connected to the motor by screws.

[0007] Preferably, the wheelset sample assembly includes an actuation cylinder reaction frame assembly, a force-adding bearing seat reaction frame, a hydraulic actuation cylinder, a force sensor, a pressure sensor connector, an axle bearing housing, a guide seat, a force-adding sleeve, a test wheel sample, and a drive axle. The upper end face of the iron plate mounting base is fixedly connected to the actuation cylinder reaction frame assembly by screws. The upper end face of the actuation cylinder reaction frame assembly is fixedly connected to the force-adding bearing seat reaction frame by screws. The bottom upper end face of the actuation cylinder reaction frame assembly is fixedly connected to the hydraulic actuation cylinder. The hydraulic rod of the hydraulic actuation cylinder is fixedly connected to the force sensor. The pressure sensor connector is installed above the force sensor. Guide seats are hinged to both sides of the pressure sensor connector. The lower end faces of both sides of the pressure sensor connector are connected to the actuation cylinder reaction frame assembly through guide posts. The upper end of the guide seat is correspondingly hinged to the axle bearing housing. The axle bearing housing is rotatably connected to the force-adding sleeve. The force-adding sleeve is fixedly connected to the drive axle. The test wheel sample is fixedly connected to the outside of the drive axle. Two sets of test wheel samples are provided.

[0008] Preferably, the guide rail support assembly includes a support frame, a protective wheel frame, a guide wheel, and a protective axle frame. The upper end face of the iron plate mounting base is fixedly connected to the support frame by screws. The upper end face of the support frame is fixedly connected to the protective wheel frame. One end of the two outer pairs of protective wheel frames is rotatably connected to the guide wheel, and one end of the middle protective wheel frame is fixedly connected to the protective axle frame.

[0009] Preferably, the wheel testing assembly includes a track wheel support base, a track wheel bearing housing, and a track wheel. The upper end face of the iron plate mounting base is fixedly connected to the track wheel support base by screws. The track wheel bearing housing is installed on the upper end face of the track wheel support base. The track wheel is installed on one side of the track wheel bearing housing. The track wheel corresponds to the test wheel sample.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention, by setting up a guide rail support assembly, adds a support frame, a protective wheel frame, and a guide wheel, thereby enhancing the support points of the lateral force structure of the equipment. It can simulate the trajectory of the vehicle wheelset running on the track under actual working conditions and ensure the stability of the lateral force, making the structure more stable. Furthermore, by combining multiple sets of support frames and wheelset sample assemblies, fatigue tests can be conducted on multiple sets of wheelsets simultaneously, greatly improving testing efficiency.

[0012] This invention, by setting up a protective axle bracket, can limit the derailment of the transmission axle, prevent the transmission axle from shifting and falling off due to vibration during testing, making the structure more stable and improving the safety of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0014] Figure 2 This is a partial structural diagram of the present utility model;

[0015] Figure 3 This is a schematic diagram of the wheel and axle assembly structure of this utility model;

[0016] Figure 4 This is an enlarged schematic diagram of the structure of area A of this utility model;

[0017] Figure 5 This is a schematic diagram of the guide rail support assembly structure of this utility model;

[0018] Figure 6 This is a schematic diagram of the wheel testing assembly structure of this utility model;

[0019] Figure 7 This is a schematic diagram of the planar structure of the wheel testing component of this utility model.

[0020] In the diagram: 1. Iron plate mounting base; 2. Power assembly; 201. Fixing frame; 202. Motor; 3. Wheelset sample assembly; 301. Actuator cylinder reaction frame assembly; 302. Force-applying bearing seat reaction frame; 303. Hydraulic actuator cylinder; 304. Force sensor; 305. Pressure sensor connector; 306. Axle bearing housing; 307. Guide seat; 308. Force-applying sleeve; 309. Test wheel sample; 310. Transmission axle; 4. Guide rail support assembly; 401. Support frame; 402. Protective wheel frame; 403. Guide wheel; 404. Protective axle frame; 5. Wheel testing assembly; 501. Track wheel support base; 502. Track wheel bearing housing; 503. Track wheel. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-7 This utility model provides an embodiment of a fatigue testing fixture for rail vehicle wheelsets, comprising a steel plate mounting base 1, a power assembly 2, a wheelset sample assembly 3, a guide rail support assembly 4, and a wheel testing assembly 5. The upper end face of the steel plate mounting base 1 is fixedly connected to the power assembly 2 by screws. The wheelset sample assembly 3 is mounted on one side of the power assembly 2. The upper end face of the steel plate mounting base 1 is connected to the guide rail support assembly 4 by screws. The guide rail support assembly 4 is connected to the wheelset sample assembly 3. The center of the upper end face of the steel plate mounting base 1 is connected to the wheel testing assembly 5 by screws. The wheel testing assembly 5 and the wheelset sample assembly 3 form a transmission connection.

[0026] Furthermore, the power assembly 2 includes a mounting bracket 201 and a motor 202. The upper end face of the iron plate mounting base 1 is fixedly connected to the mounting bracket 201 by screws, and the upper end face of the mounting bracket 201 is fixedly connected to the motor 202 by screws. The motor 202 is connected to the transmission axle 310 through the output shaft to provide it with rotational power.

[0027] Furthermore, the wheelset sample assembly 3 includes an actuation cylinder reaction frame assembly 301, a force-adding bearing seat reaction frame 302, a hydraulic actuation cylinder 303, a force sensor 304, a pressure sensor connector 305, an axle bearing housing 306, a guide seat 307, a force-adding sleeve 308, a test wheel sample 309, and a transmission axle 310. The upper end face of the iron plate mounting base 1 is fixedly connected to the actuation cylinder reaction frame assembly 301 by screws. The upper end face of the actuation cylinder reaction frame assembly 301 is fixedly connected to the force-adding bearing seat reaction frame 302 by screws. The upper end face of the bottom of the actuation cylinder reaction frame assembly 301 is fixedly connected to the hydraulic actuation cylinder 303. The hydraulic cylinder 303... A pressure rod is fixedly connected to a force sensor 304. A pressure sensor connector 305 is installed above the force sensor 304. Guide seats 307 are hinged on both sides of the pressure sensor connector 305. The lower ends of both sides of the pressure sensor connector 305 are connected to the actuation cylinder reaction frame assembly 301 through guide columns. The upper end of the guide seat 307 is correspondingly hinged to an axle bearing housing 306. The axle bearing housing 306 is rotatably connected to a force-applying sleeve 308. The force-applying sleeve 308 is fixedly connected to a transmission axle 310. The outer side of the transmission axle 310 is fixedly connected to a test wheel specimen 309. Two sets of test wheel specimens 309 are provided, which can simultaneously perform synchronous fatigue testing on two sets of track wheels 503.

[0028] Furthermore, the guide rail support assembly 4 includes a support frame 401, a protective wheel frame 402, a guide wheel 403, and a protective axle frame 404. The upper end face of the iron plate mounting base 1 is fixedly connected to the support frame 401 by screws. The upper end face of the support frame 401 is fixedly connected to the protective wheel frame 402. One end of the two outer pairs of protective wheel frames 402 is rotatably connected to the guide wheel 403. One end of the middle protective wheel frame 402 is fixedly connected to the protective axle frame 404 to prevent the transmission axle 310 from dislodging and enhance the safety of the equipment.

[0029] Furthermore, the wheel testing assembly 5 includes a track wheel support base 501, a track wheel bearing housing 502, and a track wheel 503. The upper end face of the iron plate mounting base 1 is fixedly connected to the track wheel support base 501 by screws. The track wheel bearing housing 502 is installed on the upper end face of the track wheel support base 501. The track wheel 503 is installed on one side of the track wheel bearing housing 502. The track wheel 503 corresponds to the test wheel sample 309. The track wheel bearing housing 502 can achieve the same speed matching with the test wheel sample 309.

[0030] Working principle: First, install the power assembly 2, wheelset sample assembly 3, guide rail support assembly 4, and wheel test assembly 5 onto the iron plate mounting base 1. Then, adjust the parallelism between the wheelset sample assembly 3 and the wheel test assembly 5 (ensuring it is within 0.2mm). Next, adjust the concentricity between the coupling of the power assembly 2 and the drive axle 310 of the wheelset sample assembly (within 0.1mm). The test wheel sample is protected and constrained by the actuation cylinder reaction frame assembly 301, the force-adding bearing seat reaction frame 302, the guide seat 307, and the force-adding sleeve 308 to ensure the balance and stability of the wheelset sample during operation. Finally, the power assembly 2 is controlled by ABB electrical software to provide power to the wheelset sample assembly 3, simulating the speed of the vehicle. Finally, the temperature, vibration, acceleration, displacement, and load sensors of each component are monitored. The equipment will be stopped immediately after an abnormal alarm to protect the equipment from damage caused by abnormal conditions.

[0031] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fatigue testing fixture for rail vehicle wheelsets, comprising a flat plate mounting base (1), a power assembly (2), a wheelset sample assembly (3), a guide rail support assembly (4), and a wheel testing assembly (5), characterized in that: The upper end face of the iron plate mounting base (1) is fixedly connected to the power assembly (2) by screws. The wheel set sample assembly (3) is installed on one side of the power assembly (2). The upper end face of the iron plate mounting base (1) is connected to the guide rail support assembly (4) by screws. The guide rail support assembly (4) is connected to the wheel set sample assembly (3). The center of the upper end face of the iron plate mounting base (1) is connected to the wheel test assembly (5) by screws. The wheel test assembly (5) and the wheel set sample assembly (3) form a transmission connection.

2. The fatigue testing fixture for rail vehicle wheelsets according to claim 1, characterized in that: The power assembly (2) includes a mounting bracket (201) and a motor (202). The upper end face of the iron plate mounting base (1) is fixedly connected to the mounting bracket (201) by screws, and the upper end face of the mounting bracket (201) is fixedly connected to the motor (202) by screws.

3. The fatigue testing fixture for rail vehicle wheelsets according to claim 1, characterized in that: The wheelset sample assembly (3) includes an actuation cylinder reaction frame assembly (301), a force-adding bearing seat reaction frame (302), a hydraulic actuation cylinder (303), a force sensor (304), a pressure sensor connector (305), an axle bearing housing (306), a guide seat (307), a force-adding sleeve (308), a test wheel sample (309), and a transmission axle (310). The upper end face of the iron plate mounting base (1) is fixedly connected to the actuation cylinder reaction frame assembly (301) by screws. The upper end face of the actuation cylinder reaction frame assembly (301) is fixedly connected to the force-adding bearing seat reaction frame (302) by screws. The upper end face of the bottom of the actuation cylinder reaction frame assembly (301) is fixedly connected to the hydraulic actuation cylinder (303). A force sensor (304) is fixedly connected to the hydraulic rod of the cylinder (303). A pressure sensor connector (305) is installed above the force sensor (304). Guide seats (307) are hinged on both sides of the pressure sensor connector (305). The lower end faces of both sides of the pressure sensor connector (305) are connected to the actuation cylinder reaction frame assembly (301) through guide columns. The upper end of the guide seat (307) is correspondingly hinged to the axle bearing housing (306). The axle bearing housing (306) is rotatably connected to the force-applying sleeve (308). The force-applying sleeve (308) is fixedly connected to the transmission axle (310). The test wheel specimen (309) is fixedly connected to the outside of the transmission axle (310). Two sets of test wheel specimens (309) are provided.

4. The fatigue testing fixture for rail vehicle wheelsets according to claim 1, characterized in that: The guide rail support assembly (4) includes a support frame (401), a protective wheel frame (402), a guide wheel (403), and a protective axle frame (404). The upper end of the iron plate mounting base (1) is fixedly connected to the support frame (401) by screws. The upper end of the support frame (401) is fixedly connected to the protective wheel frame (402). One end of the two outer pairs of protective wheel frames (402) is rotatably connected to the guide wheel (403), and one end of the middle protective wheel frame (402) is fixedly connected to the protective axle frame (404).

5. The fatigue testing fixture for rail vehicle wheelsets according to claim 1, characterized in that: The wheel test assembly (5) includes a track wheel support base (501), a track wheel bearing housing (502), and a track wheel (503). The upper end face of the iron plate mounting base (1) is fixedly connected to the track wheel support base (501) by screws. The track wheel bearing housing (502) is installed on the upper end face of the track wheel support base (501). The track wheel (503) is installed on one side of the track wheel bearing housing (502). The track wheel (503) corresponds to the test wheel sample (309).

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