Radial rigidity testing tool for elastic wheel damping block

Abstract

The utility model discloses a tool for testing the radial rigidity of an elastic wheel vibration damping block, which relates to the technical field of vibration damping block testing, and comprises a first pressing plate, a second pressing plate, a first wheel core and a second wheel core, and the first pressing plate and the second pressing plate are arranged in parallel; a protrusion is arranged on the face, close to the second pressing plate, of the first pressing plate. The first wheel core and the second wheel core are oppositely arranged, and both the first wheel core and the second wheel core are located between the first pressing plate and the second pressing plate; a limiting groove is formed in the face, close to the first pressing plate, of the second pressing plate. The first wheel core and the second wheel core are arranged in the limiting groove; the opposite sides of the first wheel core and the second wheel core are each provided with a mounting groove, a V-shaped groove can be defined by the two mounting grooves and the protrusion, and the V-shaped groove is used for mounting a vibration reduction block. The positions of the first wheel core and the second wheel core are limited through the limiting grooves, and deviation of the first wheel core and the second wheel core is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration damping block testing, in particular to a radial stiffness testing tooling for an elastic wheel vibration damping block. Background Technique

[0002] Rail transit has become an important means to promote urban development and alleviate urban traffic problems. The vibration and noise during the operation of rail vehicles not only reduce the riding comfort, but also shorten the service life of vehicles and tracks, seriously affecting the production and life of residents along the line. Therefore, elastic wheels have been widely used in rail vehicles around the world. An elastic element is installed between the wheel center and the wheel tyre of the elastic wheel, and this elastic element is generally a rubber vibration damping block, which can effectively reduce the vibration and noise during the operation of the vehicle wheel and rail, buffer the impact during vehicle driving, reduce the wear between the wheel and the track, reduce the maintenance cost, and improve the comfort, safety and reliability of train operation. Therefore, the performance of the vibration damping block is crucial, especially its static stiffness and dynamic stiffness characteristics.

[0003] The existing vibration damping block is of a V-shaped structure, and its stiffness needs to be tested through a designed tooling. By simulating the actual operating conditions and installation conditions of the elastic wheel, the stiffness of the vibration damping block is evaluated. When testing the stiffness of the vibration damping block, especially the static stiffness of the radial stiffness of the vibration damping block needs to be tested.

[0004] A Chinese patent with the publication number CN206601299U is disclosed in the prior art, which relates to a rubber block stiffness test device. For the first time, a test device for specifically testing the stiffness of a V-shaped rubber block is proposed. Two rubber blocks are placed in V-shaped grooves with matching sizes, and the upper and lower pressing plates are fixed by four bolts, and pressure is applied to the pressing plates, thereby measuring the stiffness of the rubber blocks. The above technical solution solves the problem that the test data is inaccurate due to the mismatch between the existing test device and the rubber block.

[0005] However, when this test device measures the radial stiffness, the two rubber blocks may affect each other, resulting in inaccurate test data, and the connecting block may move slightly during the test, resulting in inaccurate test results.

[0006] Therefore, there is an urgent need in the art for a new type of radial stiffness testing tooling for an elastic wheel vibration damping block to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide a radial stiffness testing tooling for an elastic wheel vibration damping block to solve the problems existing in the above prior art. The first wheel core and the second wheel core are limited by a limiting groove to prevent them from shifting.

[0008] To achieve the above purpose, the utility model provides the following scheme:

[0009] The utility model discloses a radial stiffness test tooling for an elastic wheel damping block, which comprises a first pressing plate, a second pressing plate, a first wheel core and a second wheel core. The first pressing plate and the second pressing plate are arranged in parallel. A protrusion is provided on the surface of the first pressing plate close to the second pressing plate. The first wheel core and the second wheel core are arranged oppositely, and both the first wheel core and the second wheel core are located between the first pressing plate and the second pressing plate.

[0010] A limiting groove is formed on the surface of the second pressing plate close to the first pressing plate. The first wheel core and the second wheel core are arranged in the limiting groove.

[0011] An installation groove is provided on each of the opposite sides of the first wheel core and the second wheel core, and a V-shaped groove can be formed between the two installation grooves and the protrusion. The V-shaped groove is used for installing the damping block.

[0012] Preferably, a positioning plate is provided on each side of the limiting groove. The two positioning plates are vertically arranged between the first pressing plate and the second pressing plate, and the upper and lower ends of the positioning plate are respectively connected with the first pressing plate and the second pressing plate.

[0013] Preferably, the first pressing plate and the second pressing plate are both provided with a plurality of positioning plate positioning holes, and further include positioning screws. The positioning screws pass through the positioning plate positioning holes and are fixedly connected with the positioning plates.

[0014] Preferably, an opening is provided on each of the two positioning plates. A damping block positioning block is provided in each of the two openings.

[0015] One end of the two damping block positioning blocks opposite to each other is in contact with both sides of the damping block, and the other end of the two damping block positioning blocks away from each other passes through the corresponding opening and is connected with the first pressing plate or the positioning plate.

[0016] Preferably, at least one wheel core connecting hole is transversely formed in the first wheel core and the second wheel core. A wheel core bolt is commonly inserted into the corresponding wheel core connecting holes on the first wheel core and the second wheel core.

[0017] Preferably, at least two wheel core positioning holes are formed in the first pressing plate and / or the second pressing plate. Wheel core holes corresponding to the wheel core positioning holes are formed in the first wheel core and the second wheel core.

[0018] Preferably, a recessed part is formed on both the first pressing plate and the second pressing plate.

[0019] Preferably, the two recessed parts are respectively located in the middle of the first pressing plate and the second pressing plate.

[0020] The recessed part is a circular groove.

[0021] The present utility model has achieved the following technical effects compared with the prior art:

[0022] The present utility model restricts the transverse movement of the first wheel core and the second wheel core along the protrusion through the limiting groove, thereby restricting the movement of the damping block. Meanwhile, it is convenient to install the first wheel core and the second wheel core, so that the first wheel core and the second wheel core are kept in the middle of the second pressing plate.

[0023] Furthermore, the present utility model facilitates the distance between the first pressing plate and the second pressing plate to reach a preset distance through the positioning plate, and prevents the first pressing plate or the second pressing plate from tilting, which is convenient for installation.

[0024] Furthermore, the overall design of the present utility model is simple, easy to use, and convenient for disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram after the installation of the radial stiffness test tooling for the elastic wheel damping block in the embodiment of the present utility model;

[0027] Figure 2 It is a schematic structural diagram after removing a positioning plate from the radial stiffness test tooling for the elastic wheel damping block in the embodiment of the present utility model;

[0028] Figure 3 It is a schematic bottom view after the installation of the radial stiffness test tooling for the elastic wheel damping block in the embodiment of the present utility model;

[0029] In the figure: 1 - first pressing plate; 11 - protrusion; 12 - positioning hole of the positioning plate; 13 - recessed part; 2 - second pressing plate; 21 - limiting groove; 22 - wheel core positioning hole; 31 - first wheel core; 32 - second wheel core; 33 - wheel core connection hole; 4 - damping block; 5 - positioning plate; 51 - opening; 6 - damping block positioning block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts belong to the scope of protection of the present utility model.

[0031] The purpose of the present utility model is to provide a radial stiffness test tooling for an elastic wheel damping block to solve the problems existing in the above-mentioned prior art. The first wheel core and the second wheel core are limited by the limiting groove to prevent them from shifting.

[0032] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Embodiment 1

[0034] As Figures 1 - 3 shown, this embodiment provides a radial stiffness test tooling for an elastic wheel damping block, including a first pressing plate 1, a second pressing plate 2, a first wheel core 31, and a second wheel core 32. Among them, the first pressing plate 1 and the second pressing plate 2 are arranged in parallel. In this embodiment, the first pressing plate 1 is located above the second pressing plate 2, and a protrusion 11 is provided on the surface of the first pressing plate 1 close to the second pressing plate 2 (i.e., the lower surface of the first pressing plate 1). The first wheel core 31 and the second wheel core 32 are arranged opposite to each other, and both the first wheel core 31 and the second wheel core 32 are located between the first pressing plate 1 and the second pressing plate 2, and the lower surfaces of the first wheel core 31 and the second wheel core 32 are located on the second pressing plate 2.

[0035] A limiting groove 21 is opened on the surface of the second pressing plate 2 close to the first pressing plate 1. Specifically, the limiting groove 21 is located at the center position of the upper surface of the second pressing plate 2, and the lower ends of both the first wheel core 31 and the second wheel core 32 are slidably arranged in the limiting groove 21.

[0036] An installation groove is provided on each of the opposite sides of the first wheel core 31 and the second wheel core 32. The installation groove corresponds to the protrusion 11, and when the first wheel core 31 and the second wheel core 32 are attached, a V-shaped groove can be formed between the two installation grooves and the protrusion 11 for installing the damping block 4. It should be noted that when the damping block 4 is not installed, the upper surfaces of the first wheel core 31 and the second wheel core 32 are in contact with the lower surface of the first pressing plate 1; when the damping block 4 is installed, due to the presence of the damping block 4, the upper surfaces of the first wheel core 31 and the second wheel core 32 are no longer in contact with the lower surface of the first pressing plate 1.

[0037] During actual use, the damping block 4 is placed below the protrusion 11, and then after the two installation grooves are attached to the damping block 4, a certain pressure is applied to the first wheel core 31 and the second wheel core 32 to make the first wheel core 31 and the second wheel core 32 fit together, thereby squeezing and fixing the damping block 4. The damping block 4 is compressed by the pressure to simulate the actual operating conditions and installation situation of the damping block 4. The test tooling is placed in a fatigue testing machine, and the first pressing plate 1 and the second pressing plate 2 are vertically squeezed to test the radial stiffness. The limiting groove 21 enables the first wheel core 31 and the second wheel core 32 to be immovable during the test.

[0038] During the installation process, since the first-round core 31 and the second-round core 32 are installed in the limiting groove 21, the limiting groove 21 restricts the first-round core 31 and the second-round core 32 to only move horizontally along the protrusion 11, thereby restricting the movement of the vibration damping block 4. At the same time, it is convenient to install the first-round core 31 and the second-round core 32, so that the first-round core 31 and the second-round core 32 are always kept in the middle of the second pressing plate 2.

[0039] In this embodiment, a positioning plate 5 is provided on both sides of the limiting groove 21, and the two positioning plates 5 are vertically arranged between the first pressing plate 1 and the second pressing plate 2, and the upper and lower ends of the positioning plate 5 are respectively connected to the first pressing plate 1 and the second pressing plate 2. Thus, the height of the positioning plate 5 is equal to the preset distance from the first pressing plate 1 to the second pressing plate 2.

[0040] After the vibration damping block 4 is placed in the V-shaped groove, the two positioning plates 5 fix the first pressing plate 1 and the second pressing plate 2, and the first pressing plate 1 and the second pressing plate 2 vertically compress the vibration damping block 4 to simulate the actual operating conditions and installation conditions of the vibration damping block 4. The positioning plate 5 facilitates the distance between the first pressing plate 1 and the second pressing plate 2 to reach the preset distance and prevents the first pressing plate 1 or the second pressing plate 2 from tilting, which is convenient for installation. When radial stiffness testing is required, the positioning plate 5 needs to be removed.

[0041] In this embodiment, the first pressing plate 1 and the second pressing plate 2 are both provided with a plurality of positioning plate positioning holes 12. As can be seen from the figure, a positioning plate positioning hole 12 is provided at each of the four corners of the first pressing plate 1 and the second pressing plate 2, and the positioning plate positioning hole 12 is provided with internal threads. Correspondingly, a corresponding positioning hole is provided at each end of each positioning plate 5. It also includes positioning screws. After the positioning screws pass through the positioning plate positioning holes 12, they are fixedly connected to the positioning holes on the positioning plate 5 by threads, thereby fixing the positioning plate 5 between the first pressing plate 1 and the second pressing plate 2.

[0042] In this embodiment, openings 51 are formed at the positions corresponding to the two positioning plates 5 and the vibration damping block 4, and a vibration damping block positioning block 6 is provided in each of the two openings 51. The vibration damping block positioning block 6 is an L-shaped structure. The opposite ends of the two vibration damping block positioning blocks 6 are respectively in contact with both sides of the vibration damping block 4, and the remote ends of the two vibration damping block positioning blocks 6 pass through the corresponding openings 51 and are connected to the first pressing plate 1 or the positioning plate 5 by screws.

[0043] Since the fatigue testing machine applies pressure to the middle of the first pressing plate 1 or the second pressing plate 2, the vibration damping block 4 can be restricted to the middle of the protrusion 11 through the two vibration damping block positioning blocks 6, ensuring that the vibration damping block 4 is in the central position and making the test results more accurate.

[0044] In this embodiment, at least one wheel core connection hole 33 is transversely formed in the first wheel core 31 and the second wheel core 32. A wheel core bolt is commonly inserted through the corresponding wheel core connection holes 33 on the first wheel core 31 and the second wheel core 32. After the wheel core bolt sequentially penetrates through the wheel core connection holes 33 on the first wheel core 31 and the second wheel core 32, both ends of the wheel core bolt are fixed by nuts, so that the first wheel core 31 and the second wheel core 32 cannot be separated.

[0045] After the first wheel core 31 and the second wheel core 32 are attached to the damping block 4, the radial stiffness test tooling for the elastic wheel damping block is placed in the fatigue testing machine. Pressure is applied to the first wheel core 31 and the second wheel core 32 to make the first wheel core 31 and the second wheel core 32 close without gaps, and then the nut of the wheel core bolt is tightened with a torque wrench, so that the first wheel core 31 and the second wheel core 32 cannot be separated. The reason for using a torque wrench is also to simulate the actual operating conditions and installation conditions of the damping block 4; alternatively, the radial stiffness test tooling for the elastic wheel damping block can also be placed in the fatigue testing machine first. At this time, the first wheel core 31 and the second wheel core 32 are distributed vertically, and pads are respectively placed above the first wheel core 31 (or the second wheel core 32) located above and below the second wheel core 32 (or the first wheel core 31) located below. During the extrusion experiment, the extrusion head of the fatigue testing machine contacts the pads and does not contact the wheel core bolt. At this time, the nut of the wheel core bolt can be tightened.

[0046] In this embodiment, at least two wheel core positioning holes 22 are formed in the first pressing plate 1 and / or the second pressing plate 2. In this embodiment, only two wheel core positioning holes 22 are provided on the second pressing plate 2. The first wheel core 31 and the second wheel core 32 are provided with wheel core holes corresponding to the wheel core positioning holes 22. An internal thread is formed in the wheel core hole. After the first wheel core 31 and the second wheel core 32 are pressed together, the wheel core positioning holes 22 are aligned with the wheel core holes, and the first wheel core 31 and the second wheel core 32 are fixed to the second pressing plate 2 by screws, further preventing the first wheel core 31 and the second wheel core 32 from shifting.

[0047] In this embodiment, recessed portions 13 are formed at the top of the first pressing plate 1 and the bottom of the second pressing plate 2. The recessed portions 13 cooperate with the clamping components (i.e., the extrusion head) of the fatigue testing machine. Through the two recessed portions 13, it is convenient for the fatigue testing machine to clamp the first pressing plate 1 and the second pressing plate 2.

[0048] In this embodiment, the two recessed portions 13 are respectively located in the middle of the first pressing plate 1 and the second pressing plate 2. And in order to be able to cooperate with the clamping components of the fatigue testing machine, the shape of the recessed portion 13 matches the shape of the clamping components of the fatigue testing machine. Therefore, the shape of the recessed portion 13 is a circular groove.

[0049] Embodiment Two

[0050] This embodiment provides a test method for the radial stiffness of an elastic wheel damping block. Based on the test tool for the radial stiffness of the elastic wheel damping block disclosed in Embodiment 1, the method includes the following steps:

[0051] Place the first wheel core 31 and the second wheel core 32 in the limit groove 21, then place the damping block 4 in the V-shaped groove, fix the damping block 4 at the middle position of the second pressing plate 2 with two damping block positioning blocks 6, install two positioning plates 5 on both sides of the first pressing plate 1 and the second pressing plate 2, and fix the two positioning plates 5 between the first pressing plate 1 and the second pressing plate 2 through positioning screws. The first pressing plate 1 and the second pressing plate 2 vertically compress the damping block 4, thereby realizing the assembly of the test tool for the radial stiffness of the elastic wheel damping block.

[0052] Remove the two damping block positioning blocks 6, place the test tool for the radial stiffness of the elastic wheel damping block in the fatigue testing machine, apply pressure to the first wheel core 31 and the second wheel core 32 to make the first wheel core 31 and the second wheel core 32 close without gaps, then tighten the nuts of the wheel core bolts with a torque wrench so that the first wheel core 31 and the second wheel core 32 cannot be separated, and unload the force applied by the extrusion device to ensure that the first wheel core 31 and the second wheel core 32 are always in close contact.

[0053] Place the test tool for the radial stiffness of the elastic wheel damping block in the fatigue testing machine, set the first pressing plate 1 or the second pressing plate 2 downward, the concave portions 13 of the first pressing plate 1 and the second pressing plate 2 cooperate with the clamping components of the fatigue testing machine, remove the two positioning plates 5, and apply pressure to the first pressing plate 1 and the second pressing plate 2 through the clamping components of the fatigue testing machine to start testing the static stiffness of the radial stiffness.

[0054] In this utility model, specific examples are used to elaborate on the principle and implementation manner of the utility model. The description of the above embodiments is only used to help understand the method and its core idea of the utility model; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the utility model.

Claims

1. A radial stiffness test tool for an elastic wheel damping block, characterized in that: The invention comprises a first pressing plate (1), a second pressing plate (2), a first wheel core (31) and a second wheel core (32), wherein the first pressing plate (1) and the second pressing plate (2) are arranged in parallel; a protrusion (11) is provided on a surface of the first pressing plate (1) close to the second pressing plate (2); the first wheel core (31) and the second wheel core (32) are arranged opposite to each other, and the first wheel core (31) and the second wheel core (32) are both located between the first pressing plate (1) and the second pressing plate (2); A limiting groove (21) is provided on a surface of the second pressing plate (2) close to the first pressing plate (1); the first wheel core (31) and the second wheel core (32) are arranged in the limiting groove (21); The first wheel core (31) and the second wheel core (32) are each provided with a mounting groove on one opposite side, and the two mounting grooves and the protrusion (11) can form a V-shaped groove, and the V-shaped groove is used to install a vibration damping block (4).

2. The radial stiffness testing tool for elastic wheel damping block according to claim 1, characterized in that: A positioning plate (5) is provided on both sides of the limiting groove (21); the two positioning plates (5) are vertically arranged between the first pressing plate (1) and the second pressing plate (2), and the upper and lower ends of the positioning plates (5) are respectively connected to the first pressing plate (1) and the second pressing plate (2).

3. The radial stiffness testing tool for elastic wheel damping block according to claim 2, characterized in that: The first pressing plate (1) and the second pressing plate (2) are both provided with a plurality of positioning plate positioning holes (12), and also include positioning screws, which are fixedly connected to the positioning plate (5) after passing through the positioning plate positioning holes (12).

4. The radial stiffness testing tool for elastic wheel damping block according to claim 2, characterized in that: The two positioning plates (5) are each provided with an opening (51); a vibration damping block positioning block (6) is each provided in the two openings (51); The opposite ends of the two vibration-damping block positioning blocks (6) are in contact with the two sides of the vibration-damping block (4), and the distant ends of the two vibration-damping block positioning blocks (6) pass through the corresponding openings (51) and are connected to the first pressing plate (1) or the positioning plate (5).

5. The radial stiffness testing tool for elastic wheel damping block according to claim 1, characterized in that: The first wheel core (31) and the second wheel core (32) are transversely provided with at least one wheel core connecting hole (33); and a wheel core bolt is commonly inserted through the corresponding wheel core connecting holes (33) on the first wheel core (31) and the second wheel core (32).

6. The radial stiffness testing tool for elastic wheel damping block according to claim 1, characterized in that: The first pressing plate (1) and / or the second pressing plate (2) are provided with at least two wheel core positioning holes (22); the first wheel core (31) and the second wheel core (32) are provided with wheel core holes corresponding to the wheel core positioning holes (22).

7. The radial stiffness testing tool for elastic wheel damping block according to claim 1, characterized in that: The first pressing plate (1) and the second pressing plate (2) are both provided with a recessed portion (13).

8. The radial stiffness testing tool for elastic wheel damping blocks according to claim 7, characterized in that: The two recessed portions (13) are respectively located in the middle of the first pressing plate (1) and the second pressing plate (2); The recessed portion (13) is a circular groove.

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