A test device for measuring the anti-rigidity value of a bogie

Abstract

The application provides a test tool for measuring the anti-rhombus rigidity value of a bogie, comprising a simulation bolster, a simulation side frame box, a second simulation side frame box, a steel ball, a lower center plate and a moving table; the simulation side frame box is internally provided with a wedge assembly and a spring; the wedge assembly is located above the spring; the simulation side frame box comprises a first simulation side frame box and a second simulation side frame box; the first simulation side frame box and the second simulation side frame box are connected through the simulation bolster; the simulation bolster is provided with the lower center plate; the lower center plate is internally provided with the steel ball; and the lower end of the second simulation side frame box is provided with the moving table. The application has the advantages of simple structure, convenient use and accurate estimation and evaluation of the anti-rhombus rigidity of the bogie at the design stage.

Description

Technical Field

[0001] This invention belongs to the technical field of railway vehicle experimental fixtures, and specifically relates to an experimental fixture for measuring the anti-diamond stiffness value of a bogie. Background Technology

[0002] The anti-diamond stiffness value has a significant impact on the dynamic performance of the three traditional components of the bogie. To meet the performance requirements of the vehicle, calculating and determining a reasonable anti-diamond stiffness and related parameters of the bogie is an important part of bogie design.

[0003] In recent years, domestic research on the anti-diamond stiffness of bogies has been conducted through physical testing and theoretical calculations. While physical testing can accurately measure the anti-diamond stiffness value of the bogie, it can only be performed after the product is manufactured. Although theoretical calculations can easily calculate the anti-diamond stiffness value of the bogie, the results are not accurate.

[0004] Patent document CN116465655A discloses a test device and method for testing the slewing resistance torque of a railway vehicle bogie. This device can solve problems such as low accuracy in testing the slewing resistance torque of the bogie and the inability of the simulated car body to be directly connected to the bogie. It uses a simulated car body with equivalent mass effect to replace the actual car body, and achieves the connection between the simulated car body and the bogie through a center pin seat fixture and an air spring supplementary seat fixture. However, its evaluation accuracy is still not high and cannot meet the requirements of the design stage. Summary of the Invention

[0005] In view of the problems existing in the background technology, the present invention provides a test fixture that can accurately estimate and evaluate the anti-diamond stiffness of the bogie during the design stage.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A test fixture for measuring the anti-diamond stiffness of a bogie includes a simulated bolster, a simulated side frame, a second simulated side frame, steel balls, a lower center plate, and a moving platform. The simulated side frame contains a wedge assembly and a spring; the wedge assembly is located above the spring. The simulated side frame includes a first simulated side frame and a second simulated side frame; the first and second simulated side frame are connected by a simulated bolster. The simulated bolster has a lower center plate; the lower center plate contains steel balls; and the lower end of the second simulated side frame has a moving platform.

[0008] Furthermore, the first simulated side frame frame is fixed to the ground.

[0009] Furthermore, longitudinal loading seats are provided on both sides of the second simulated side frame; the longitudinal loading seats are used to apply longitudinal force to the second simulated side frame.

[0010] Furthermore, the wedge assembly includes a wedge and a figure-eight pad; two wedges are symmetrically arranged on the simulated rocker along the axial center line of the simulated rocker, the simulated rocker has a figure-eight pad groove, and the figure-eight pad is suspended in the figure-eight pad groove of the simulated rocker by bolts, one inclined surface of the figure-eight pad abuts against the inclined surface of the wedge, and the other inclined surface of the figure-eight pad abuts against the inclined surface of the inner wall of the groove of the simulated rocker.

[0011] Furthermore, the wedge assembly also includes a secondary friction plate; the secondary friction plate is installed on the inclined surface of the wedge near the side of the figure-eight pad, and the inclined surface of the figure-eight pad near the side of the wedge abuts against the secondary friction plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The present invention has a simple structure and low cost. When designing bogies, the accurate anti-diamond stiffness can be obtained through testing based on parameters such as wedges and springs, thereby guiding the overall design of the bogie. The wedge components in the test piece can be easily replaced to measure the anti-diamond stiffness of different bogie models. It is a more convenient and safer test method for measuring anti-diamond stiffness. Attached Figure Description

[0014] Figure 1 This is a top view of the structure of the present invention.

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 3 This is a side view of the structure of the present invention.

[0017] Among them, 1—simulated rocker; 2—first simulated side frame; 3—second simulated side frame; 4—longitudinal loading seat; 7—steel ball; 6—lower center plate; 5—wedge assembly; 8—moving table; 9—spring; 51—wedge; 52—figure-eight pad; 53—secondary friction plate. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0019] As attached Figure 1As shown, the present invention includes a simulated rocker 1, a simulated side frame, a second simulated side frame 3, a steel ball 7, a lower center plate 6, and a moving platform 8; the simulated side frame is provided with a wedge assembly 5 and a spring 9; the wedge assembly 5 is located above the spring 9; the simulated side frame includes a first simulated side frame 2 and a second simulated side frame 3; the first simulated side frame 2 and the second simulated side frame 3 are connected by the simulated rocker 1; the simulated rocker 1 is provided with a lower center plate 6; the lower center plate 6 is provided with a steel ball 7; the lower end of the second simulated side frame 3 is provided with a moving platform 8.

[0020] The first simulated side frame 2 is fixed to the ground.

[0021] The second simulated side frame 3 is provided with longitudinal loading seats 4 on both sides; the longitudinal loading seats 4 are used to apply longitudinal force to the second simulated side frame 3, and the second simulated side frame 3 can move.

[0022] The wedge assembly 5 includes a wedge 51 and a figure-eight pad 52. The two wedges are symmetrically arranged on the simulated rocker 1 along the axis center line. The simulated rocker 1 has a figure-eight pad groove, and the figure-eight pad 52 is suspended in the figure-eight pad groove of the simulated rocker 1 by bolts. One inclined surface of the figure-eight pad 52 abuts against the inclined surface of the wedge 51, and the other inclined surface of the figure-eight pad 52 abuts against the inclined surface of the inner wall of the groove of the simulated rocker.

[0023] The wedge assembly 5 also includes a secondary friction plate 53; the secondary friction plate 53 is installed on the inclined surface of the wedge 51 near the side of the figure-eight pad 52, and the inclined surface of the figure-eight pad 52 near the side of the wedge abuts against the secondary friction plate 53.

[0024] This invention employs a welded structure to simulate the contact between the bogie bolster, side frame, and wedge. By applying a longitudinal force to one side of the simulated side frame, the fixture undergoes a rhomboid deformation. By measuring the longitudinal displacement of the simulated side frame, the anti-rhomboid stiffness value of the experimental fixture can be obtained. The experimental fixture of this invention can be used to study the contribution and influence of different components on the anti-rhomboid stiffness of the bogie by controlling the wedge angle, spring stiffness, and whether or not a cross-bracing device is installed.

[0025] In use, the first simulated side frame 2 is fixed to the ground. A vertical force is applied to the steel ball 7 (ensuring that the loading device and the simulated bolster 1 can slide relative to each other within a small range on the lower center plate 6), causing the simulated bolster 1 to move downwards. At the same time, the spring 9 is compressed by the vertical force, and the wedge assembly 5 is pressed tightly against the side walls of the first simulated side frame 2 and the second simulated side frame 3 by the pressure of the simulated bolster 1 and the elastic force of the spring 9. After the fixture comes to rest, a longitudinal force is applied to the longitudinal loading seat 4, causing the second simulated side frame 3 to produce a longitudinal displacement on the moving platform 8. By measuring the displacement and calculating it using the stiffness formula, the anti-diamond stiffness value of the fixture, i.e., the anti-diamond stiffness value of the bogie, can be obtained.

[0026] The scope of protection of this invention is not limited to the embodiments described above. Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its scope and spirit. If these modifications and variations fall within the scope of the claims of this invention and their equivalents, then the intent of this invention also includes these modifications and variations.

Claims

1. A test fixture for measuring the anti-diamond stiffness value of a bogie, characterized in that: Includes a simulated rocker arm (1), a simulated side frame, a steel ball (7), a lower center plate (6), and a moving platform (8); The simulated side frame is provided with a wedge assembly (5) and a spring (9); the wedge assembly (5) is located above the spring (9); The simulated side frame includes a first simulated side frame (2) and a second simulated side frame (3); the first simulated side frame (2) and the second simulated side frame (3) are connected by a simulated rocker (1); the simulated rocker (1) is provided with a lower center plate (6); the lower center plate (6) is provided with a steel ball (7); the lower end of the second simulated side frame (3) is provided with a moving platform (8); The first simulated side frame (2) is fixed to the ground; The second simulated side frame (3) is provided with longitudinal loading seats (4) on both sides; the longitudinal loading seats (4) are used to apply longitudinal force to the second simulated side frame (3); The wedge assembly (5) includes a wedge (51) and a figure-eight pad (52); the two wedges are symmetrically arranged on the simulated rocker (1) along the axis center line. The simulated rocker (1) has a figure-eight pad groove, and the figure-eight pad (52) is suspended in the figure-eight pad groove of the simulated rocker (1) by bolts. One inclined surface of the figure-eight pad (52) abuts against the inclined surface of the wedge (51), and the other inclined surface of the figure-eight pad (52) abuts against the inclined surface of the inner wall of the groove of the simulated rocker.

2. The test fixture for measuring the anti-diamond stiffness value of a bogie according to claim 1, characterized in that: The wedge assembly (5) also includes a secondary friction plate (53); the secondary friction plate (53) is installed on the inclined surface of the wedge (51) near the side of the figure-eight pad (52), and the inclined surface of the figure-eight pad (52) near the side of the wedge abuts against the secondary friction plate (53).

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