Multi-axis vibration test clamp tool for rail transit vehicle

Abstract

The utility model discloses a rail transit vehicle multi-axis vibration test clamp tool, and relates to the technical field of vehicle multi-axis vibration tests. The device comprises a vibration table. The driving assembly is pulled to compress the clamping assembly, so that clamping arrangement of the driving assembly is relieved, the driving assembly is rotated to drive the clamping assembly with one fixed end to move, when the clamping assembly moves, the clamping assembly can be attached to the inner side of the hub, and the hub can be clamped by the clamping assembly along with continuous movement of the clamping assembly. The hub is firmly fixed to the top end of the supporting assembly, then the driving assembly is loosened so that the clamping assembly can push the driving assembly to reset, the driving assembly can be clamped and fixed again, the vibration table is prevented from loosening in the working process, a vehicle is prevented from being disengaged from the vibration table in the vibration process, and the service life of the vehicle is prolonged. And the stability of the vehicle in the vibration experiment process is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle multi-axis vibration testing technology, and specifically relates to a fixture for multi-axis vibration testing of rail transit vehicles. Background Technology

[0002] Multi-axis vibration testing of vehicles is a reliability testing method that simulates the multi-dimensional vibration environment that vehicles experience under complex road conditions. By applying composite vibration excitation of three or six degrees of freedom (X, Y, Z) to the vehicle, it verifies its structural strength, connection reliability, component performance and system stability, and identifies potential fatigue damage, loosening, resonance and other problems.

[0003] In existing technologies, the four sets of wheel hubs of a vehicle are generally clamped and fixed on the front and rear sides, but it is not possible to clamp and fix the upper and lower sides of the wheel rollers. However, when the vehicle is subjected to vertical vibration, the wheel hubs are prone to detach from the clamping device, thus affecting the vibration test data of the vehicle. Utility Model Content

[0004] In order to address the problem that when a vehicle is subjected to vertical vibration during multi-axis vibration testing, the wheel hub may easily detach from the clamping device, thereby affecting the vibration test data of the vehicle, this utility model proposes a multi-axis vibration test fixture for rail transit vehicles to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a multi-axis vibration testing fixture for rail transit vehicles, including a vibration table:

[0007] The vibration table is respectively equipped with a support assembly, a drive assembly, a snap-fit ​​assembly, and a clamping assembly;

[0008] The support assembly is fixedly installed at its bottom end to the top end of the vibration table so that the support assembly can support and limit the vehicle.

[0009] The drive assembly has one end fixedly connected to one end of the clamping assembly, so that the drive assembly drives the clamping assembly to clamp and limit the vehicle wheel hub.

[0010] The snap-fit ​​component has one end fixedly connected to one side of the drive component, so that the snap-fit ​​component snaps and limits the drive component.

[0011] Furthermore, the support assembly includes a support platform, the bottom end of which is fixedly installed to the top end of the vibration table, a positioning plate is fixedly connected to one side of the support platform, and a limit plate is fixedly connected to the top end of the support platform.

[0012] Furthermore, the drive assembly includes a mounting shaft, the outer surface of which is rotatably disposed with respect to the interior of the support platform. A sliding groove is provided on the outer surface of the mounting shaft, and a sliding block is slidably disposed inside the sliding groove. A crank is fixedly connected to one side of the sliding block.

[0013] Furthermore, the snap-fit ​​assembly includes a splined cylinder, one side of which is fixedly connected to one side of the support platform, and a splined sleeve is splinedly connected to the outer surface of the splined cylinder, one end of which is fixedly connected to one side of the crank handle.

[0014] Furthermore, the snap-fit ​​assembly also includes a retaining sleeve, the inside of which is fixedly installed on the outer surface of the mounting shaft, and a spring is fixedly connected to one side of the retaining sleeve, one end of which is fixedly connected to one side of the crank handle.

[0015] Furthermore, the clamping assembly includes a positioning groove, which is formed inside the support platform. A bidirectional screw is rotatably disposed inside the positioning groove. One end of the bidirectional screw is fixedly connected to one end of the mounting shaft. Two sets of clamping blocks are threadedly connected to the threaded surface of the bidirectional screw.

[0016] Furthermore, a T-shaped groove is provided at the top of the support platform, and a T-shaped block is slidably disposed inside the T-shaped groove. The top of the T-shaped block is fixedly connected to the bottom of the clamping block.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model uses a pull drive assembly to compress the locking assembly, thereby releasing the locking mechanism on the drive assembly. By rotating the drive assembly, it moves the clamping assembly fixed at one end. When the clamping assembly moves, it fits against the inner side of the wheel hub. With the continuous movement of the clamping assembly, it firmly fixes the wheel hub to the top of the support assembly. Then, the drive assembly is released, allowing the locking assembly to push the drive assembly to reset, so that the drive assembly can be locked and fixed again. This prevents the vibration table from loosening during operation, prevents the vehicle from falling off the vibration table during vibration, and ensures the stability of the vehicle during vibration testing.

[0019] 2. This utility model allows movement by pulling the crank handle, which in turn moves the spline sleeve fixed on one side, facilitating the disengagement of the spline connection between the spline sleeve and the spline cylinder. This makes it easier to rotate the crank handle. When the crank handle is released, the spring releases its elastic stress, causing the spring to push the crank handle fixed at one end to reset. This allows the crank handle to reconnect the spline sleeve with the spline cylinder, thus limiting the crank handle and preventing it from rotating during vibration.

[0020] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of this utility model from a rear-view perspective;

[0024] Figure 3 This is a top-view structural schematic diagram of the present invention;

[0025] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the local structure at point A;

[0026] Figure 5 This is a schematic diagram of the internal structure of the snap-fit ​​assembly of this utility model;

[0027] Figure 6 For the present utility model Figure 5 An enlarged schematic diagram of the local structure at point B.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Vibration table; 2. Support assembly; 201. Support platform; 202. Positioning plate; 203. Limiting plate; 3. Drive assembly; 301. Mounting shaft; 302. Sliding groove; 303. Sliding block; 304. Handle; 4. Snap-fit ​​assembly; 401. Splined cylinder; 402. Splined sleeve; 403. Fixing sleeve; 404. Spring; 5. Clamping assembly; 501. Positioning groove; 502. Bidirectional screw; 503. Clamping block; 6. T-slot; 7. T-block. Detailed Implementation

[0030] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0031] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements 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 the utility model.

[0032] Please see Figures 1-6 As shown, this utility model is a multi-axis vibration test fixture for rail transit vehicles, including a vibration table 1:

[0033] The vibration table 1 is respectively provided with a support component 2, a drive component 3, a snap-fit ​​component 4, and a clamping component 5;

[0034] The bottom end of the support component 2 is fixedly installed to the top end of the vibration table 1 so that the support component 2 can support and limit the vehicle.

[0035] The drive assembly 3 is fixedly connected at one end to the clamping assembly 5 so that the drive assembly 3 drives the clamping assembly 5 to clamp and limit the vehicle wheel hub.

[0036] The snap-fit ​​component 4 has one end fixedly connected to one side of the drive component 3 so that the snap-fit ​​component 4 snaps and limits the drive component 3.

[0037] It should be noted that the vibration table 1 is existing technology, connected to the base frame via six sets of actuators. Each set of actuators can independently control the axial displacement, velocity, or acceleration. By adjusting the length and force of each support leg, the platform can achieve motion in six degrees of freedom.

[0038] In use, the vehicle is driven to the top of the support assembly 2, and the two sets of rear wheel hubs of the vehicle are brought into contact with one side of the support assembly 2. Then, the drive assembly 3 is pulled to compress the locking assembly 4, thereby releasing the locking setting of the drive assembly 3. By rotating the drive assembly 3, the clamping assembly 5, which is fixed at one end, is moved. Since the clamping assembly 5 is located on one side of the wheel hub and the bottom surface of the clamping assembly 5 is set with an arc-shaped slope, the clamping assembly 5 can fit against the inner side of the wheel hub when it moves. With the continuous movement of the clamping assembly 5, the wheel hub is firmly fixed to the top of the support assembly 2. Then, the drive assembly 3 is released so that the locking assembly 4 pushes the drive assembly 3 to reset, so that the drive assembly 3 can be locked again, thereby preventing the vibration table 1 from loosening during operation.

[0039] This invention releases the locking mechanism of the drive assembly 3 by pulling the drive assembly 3 to compress the locking assembly 4. By rotating the drive assembly 3, it moves the clamping assembly 5, which is fixed at one end. When the clamping assembly 5 moves, it fits against the inner side of the wheel hub. With the continuous movement of the clamping assembly 5, it firmly fixes the wheel hub to the top of the support assembly 2. Then, the drive assembly 3 is released, allowing the locking assembly 4 to push the drive assembly 3 back to its original position, so that the drive assembly 3 can be locked and fixed again. This prevents the vibration table 1 from loosening during operation, prevents the vehicle from falling off the vibration table 1 during vibration, and ensures the stability of the vehicle during the vibration test.

[0040] In one embodiment, the support component 2 includes a support platform 201, the bottom end of which is fixedly installed to the top end of the vibration table 1, a positioning plate 202 is fixedly connected to one side of the support platform 201, and a limit plate 203 is fixedly connected to the top end of the support platform 201.

[0041] The positioning plate 202 can limit the vehicle wheel hub, thus facilitating the vehicle to be driven to the top of the support platform 201. The limiting plate 203 can limit one side of the wheel hub, thus facilitating the guidance of the vehicle when driving to the top of the support platform 201 and improving the stability of the vehicle during operation.

[0042] In one embodiment, the drive assembly 3 includes a mounting shaft 301, the outer surface of which is rotatably disposed with respect to the interior of the support platform 201. A sliding groove 302 is provided on the outer surface of the mounting shaft 301, and a sliding block 303 is slidably disposed inside the sliding groove 302. A crank handle 304 is fixedly connected to one side of the sliding block 303.

[0043] By pulling the handle 304, the internally fixed sliding block 303 is moved along the direction of the sliding groove 302. Then, by turning the handle 304, the internally fixed sliding block 303 is made to move in a circular motion, and the sliding groove 302 is used to drive the mounting shaft 301 to rotate, thereby facilitating the driving of the mounting shaft 301.

[0044] In one embodiment, the snap-fit ​​assembly 4 includes a splined cylinder 401, one side of which is fixedly connected to one side of the support platform 201, and a splined sleeve 402 is splinedly connected to the outer surface of the splined cylinder 401, one end of which is fixedly connected to one side of the crank handle 304.

[0045] The snap-fit ​​assembly 4 also includes a fixing sleeve 403, the inside of which is fixedly installed on the outer surface of the mounting shaft 301, and a spring 404 is fixedly connected to one side of the fixing sleeve 403, one end of which is fixedly connected to one side of the crank handle 304.

[0046] By pulling the crank handle 304, the spline sleeve 402 fixed on one side can be moved to disengage the spline connection between the spline sleeve 402 and the spline cylinder 401, thus facilitating the rotation of the crank handle 304. When the crank handle 304 is released, the spring 404 releases its elastic stress, causing the spring 404 to push the crank handle 304 fixed at one end to reset, thereby causing the crank handle 304 to drive the spline sleeve 402 to re-engage with the spline cylinder 401, thus limiting the crank handle 304 and preventing it from rotating during vibration.

[0047] In one embodiment, the clamping assembly 5 includes a positioning groove 501, which is formed inside the support platform 201. A bidirectional screw 502 is rotatably disposed inside the positioning groove 501. One end of the bidirectional screw 502 is fixedly connected to one end of the mounting shaft 301. Two sets of clamping blocks 503 are threadedly connected to the threaded surface of the bidirectional screw 502.

[0048] When the mounting shaft 301 rotates, it drives the bidirectional screw 502, which is fixed at one end, to rotate. This causes the bidirectional screw 502 to drive the two sets of clamping blocks 503, which are threadedly connected on the threaded surface, to move synchronously in opposite directions. Since the bottom surface of the clamping block 503 is set with an arc-shaped slope and corresponds to the inner wall of the hub, it can enter the inner side of the hub during the continuous movement of the clamping block 503 and clamp and fix the hub, preventing the hub from detaching from the clamping block 503 during the vibration test.

[0049] In one embodiment, for the support platform 201, a T-shaped groove 6 is provided at the top of the support platform 201, and a T-shaped block 7 is slidably disposed inside the T-shaped groove 6. The top of the T-shaped block 7 is fixedly connected to the bottom of the clamping block 503.

[0050] When the clamping block 503 moves, it can drive the T-block 7 to move, and make the T-block 7 move along the direction of the T-slot 6, thereby improving the stability of the clamping block 503 during the movement process.

[0051] Through the above technical solution, 1. By pulling the drive component 3, it compresses the locking component 4, thereby releasing the locking setting of the drive component 3. By rotating the drive component 3, it drives the clamping component 5 fixed at one end to move. When the clamping component 5 moves, it can fit against the inner side of the wheel hub. As the clamping component 5 continues to move, it firmly fixes the wheel hub to the top of the support component 2. Then, the drive component 3 is released so that the locking component 4 pushes the drive component 3 to reset, so that the drive component 3 can be locked and fixed again. This avoids the vibration table 1 from loosening during operation, prevents the vehicle from falling off the vibration table 1 during vibration, and ensures the stability of the vehicle during the vibration test.

[0052] 2. By pulling the crank handle 304, the spline sleeve 402 fixed on one side can be moved to disengage the spline connection between the spline sleeve 402 and the spline cylinder 401, thus facilitating the rotation of the crank handle 304. When the crank handle 304 is released, the spring 404 releases its elastic stress, causing the spring 404 to push the crank handle 304 fixed at one end to reset, thereby causing the crank handle 304 to drive the spline sleeve 402 to re-connect with the spline cylinder 401, thus limiting the crank handle 304 and preventing it from rotating during vibration.

[0053] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-axis vibration test fixture for rail transit vehicles, comprising a vibration table (1), characterized in that: The vibration table (1) is respectively provided with a support assembly (2), a drive assembly (3), a snap-fit ​​assembly (4) and a clamping assembly (5); The bottom end of the support component (2) is fixedly installed to the top end of the vibration table (1) so that the support component (2) supports and limits the vehicle; The drive assembly (3) is fixedly connected at one end to the clamping assembly (5) so that the drive assembly (3) drives the clamping assembly (5) to clamp and limit the vehicle wheel hub; The snap-fit ​​component (4) is fixedly connected at one end to one side of the drive component (3) so that the snap-fit ​​component (4) snaps and limits the drive component (3).

2. The multi-axis vibration test fixture for rail transit vehicles according to claim 1, characterized in that, The support assembly (2) includes a support platform (201), the bottom end of which is fixedly installed with the top end of the vibration table (1), a positioning plate (202) is fixedly connected to one side of the support platform (201), and a limit plate (203) is fixedly connected to the top end of the support platform (201).

3. The multi-axis vibration test fixture for rail transit vehicles according to claim 2, characterized in that, The drive assembly (3) includes a mounting shaft (301), the outer surface of which is rotatably disposed with respect to the interior of the support platform (201), a sliding groove (302) is provided on the outer surface of the mounting shaft (301), a sliding block (303) is slidably disposed inside the sliding groove (302), and a crank (304) is fixedly connected to one side of the sliding block (303).

4. The multi-axis vibration test fixture for rail transit vehicles according to claim 3, characterized in that, The snap-fit ​​assembly (4) includes a splined cylinder (401), one side of which is fixedly connected to one side of the support platform (201). A splined sleeve (402) is splinedly connected to the outer surface of the splined cylinder (401), and one end of the splined sleeve (402) is fixedly connected to one side of the crank handle (304).

5. The multi-axis vibration test fixture for rail transit vehicles according to claim 4, characterized in that, The snap-fit ​​assembly (4) also includes a fixing sleeve (403), the inside of which is fixedly installed on the outer surface of the mounting shaft (301), and a spring (404) is fixedly connected to one side of the fixing sleeve (403), one end of which is fixedly connected to one side of the crank handle (304).

6. The multi-axis vibration test fixture for rail transit vehicles according to claim 3, characterized in that, The clamping assembly (5) includes a positioning groove (501) which is opened inside the support platform (201). A bidirectional screw (502) is rotatably arranged inside the positioning groove (501). One end of the bidirectional screw (502) is fixedly connected to one end of the mounting shaft (301). Two sets of clamping blocks (503) are threadedly connected to the threaded surface of the bidirectional screw (502).

7. The multi-axis vibration test fixture for rail transit vehicles according to claim 6, characterized in that, The top of the support platform (201) is provided with a T-shaped groove (6), and a T-shaped block (7) is slidably arranged inside the T-shaped groove (6). The top of the T-shaped block (7) is fixedly connected to the bottom of the clamping block (503).

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