Rail transit vehicle axle fatigue testing device capable of applying axial force

Abstract

The utility model belongs to the technical field of rail transit vehicle testing, and particularly relates to a rail transit vehicle axle fatigue testing device capable of applying axial force, which comprises a mounting seat, a sliding block is fixedly arranged on the lower surface of a base, the sliding block is arranged on a sliding rail in a sliding manner, and the sliding rail is fixed on the mounting seat. A transverse rod is connected between the two bases in a hinged mode, guide blocks are arranged on the upper surface and the lower surface of the transverse rod and arranged in sliding grooves in U-shaped blocks in a sliding mode, the U-shaped blocks are fixedly connected with the movable end of a hydraulic oil cylinder, the hydraulic oil cylinder is installed on a fixing base, and the fixing base is fixedly connected with the movable end of the hydraulic oil cylinder. And the fixed seat is fixedly mounted on the upper surface of the mounting seat. According to the utility model, the U-shaped block can be driven to move through the action of the hydraulic oil cylinder, the force is converted into the force for the transverse movement of the base through the matching of the chute and the guide block, and the base drives the synchronizing wheel to move, so that the axial force loading of the loading wheel and the axle is realized, and the fatigue test of the axle in a turning state is further completed.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit vehicle testing technology, specifically relating to a rail transit vehicle axle fatigue testing device that can apply axial force. Background Technology

[0002] With the development of technology, rail transit vehicles have become a common means of transportation for people. As one of the most important core components of rail transit vehicles, the working stability of the axle is directly related to the safety of vehicle operation; therefore, fatigue testing of the axle is required before it is put into use to comprehensively verify the design, processing and manufacturing of the wheel.

[0003] The utility model patent with patent application number "202223007935.1" discloses "a fatigue testing device for axle of rail transit vehicle". This patent can perform different standard tests on axle, such as EN standard fatigue test and GOST standard fatigue test. However, the above patent cannot apply axial stress to the axle in order to conduct fatigue test of the axle in the turning state. Utility Model Content

[0004] This invention provides a fatigue testing device for rail transit vehicle axles that can apply axial force to address the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fatigue testing device for a rail transit vehicle axle capable of applying axial force includes a mounting base. Two actuating cylinders are arranged side-by-side on the upper surface of the mounting base. A force sensor is mounted on the upper end of each actuating cylinder. A bearing seat is connected to the upper end of the force sensor. An axle is installed between the two bearing seats. One end of the axle is connected to the output shaft of a motor via a universal coupling. Loading wheels are mounted on the left and right sides of the axle. A synchronous pulley is positioned below the loading wheels and mounted on a bearing seat via a shaft. A synchronous motor is positioned between the two synchronous pulleys. The output shaft is connected to the rotating shaft to drive two synchronous pulleys to rotate, so that the rotational speed of the synchronous pulleys is consistent with the rotational linear speed of the loading pulley. The second bearing seat is mounted on the base. A slider is fixedly set on the lower surface of the base. The slider is slidably set on the slide rail. The slide rail is fixed on the mounting base. A crossbar is connected between the two bases by a hinge. Guide blocks are set on the upper and lower surfaces of the crossbar. The guide blocks are slidably set in the slide groove on the U-shaped block. The U-shaped block is fixedly connected to the movable end of the hydraulic cylinder. The hydraulic cylinder is mounted on the fixed base. The fixed base is fixedly mounted on the upper surface of the mounting base.

[0007] Furthermore, two mounting holes are provided on the crossbar, and the two mounting holes are respectively located on both sides of the U-shaped block. A second force sensor is installed in the mounting hole to detect the axial force applied to the base.

[0008] Furthermore, a laser displacement sensor is fixed on the mounting base, and the laser displacement sensor is installed between the two bases to detect the displacement of the bases.

[0009] Furthermore, limit blocks are provided on both sides of the guide rail.

[0010] Furthermore, a limiting screw is threaded onto the limiting block to facilitate adjustment of the limiting distance to the base.

[0011] Furthermore, a limiting piece is fixedly connected to the end of the limiting screw to prevent the end of the screw from scratching the base.

[0012] Furthermore, the guide block is a radial bearing, and the outer diameter of the guide block is the same as the width of the slide groove, so as to reduce the friction between the guide block and the slide groove.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] This utility model can drive the U-shaped block to move by the action of the hydraulic cylinder, and convert the force into the force of the base to move laterally through the cooperation of the slide and the guide block. The base drives the synchronous wheel to move, thereby realizing the axial force loading on the loading wheel and the axle, and thus completing the fatigue test of the axle in the turning state.

[0015] This invention is equipped with a synchronous motor to drive the synchronous wheel and the loading wheel to rotate at the same linear speed, eliminating the relative motion tendency between them, minimizing contact fatigue between the synchronous wheel and the loading wheel, and extending the service life of the loading wheel. Attached Figure Description

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model after the protective part has been removed;

[0018] Figure 3 This utility model Figure 2 A magnified view of a portion of circle A in the center;

[0019] In the diagram, 1 is the mounting base, 2 is the actuating cylinder, 3 is the first force sensor, 4 is the first bearing housing, 5 is the axle, 6 is the universal coupling, 7 is the first motor, 8 is the loading wheel, 9 is the synchronous wheel, 10 is the second bearing housing, 11 is the synchronous motor, 12 is the base, 13 is the slider, 14 is the slide rail, 15 is the crossbar, 16 is the guide block, 17 is the U-shaped block, 18 is the slide groove, 19 is the hydraulic cylinder, 20 is the fixed base, 21 is the mounting hole, 22 is the laser displacement sensor, 23 is the limit block, 24 is the limit screw, and 25 is the limit piece. Detailed Implementation

[0020] To further illustrate the technical solution of this utility model, the following embodiments will be used to further explain this utility model.

[0021] like Figures 1 to 3As shown, a fatigue testing device for a rail transit vehicle axle capable of applying axial force includes a mounting base 1. Two actuating cylinders 2 are arranged side-by-side on the upper surface of the mounting base 1. A force sensor 3 is mounted on the upper end of each actuating cylinder 2. A bearing seat 4 is connected to the upper end of the force sensor 3. An axle 5 is installed between the two bearing seats 4. One end of the axle 5 is connected to the output shaft of a motor 7 via a universal coupling 6. Loading wheels 8 are mounted on the left and right sides of the axle 5. A synchronous pulley 9 is positioned below the loading wheels 8. The synchronous pulley 9... A rotating shaft is mounted on the second bearing seat 10. A synchronous motor 11 is positioned between the two synchronous pulleys 9. The output shaft of the synchronous motor 11 is connected to the rotating shaft to drive the two synchronous pulleys 9 to rotate, ensuring that the rotational speed of the synchronous pulleys 9 matches the linear speed of the loading wheel 8. The second bearing seat 10 is mounted on the base 12. A slider 13 is fixedly mounted on the lower surface of the base 12. The slider 13 is slidably mounted on a slide rail 14, which is fixed to the mounting base 1. Limit blocks 23 are provided on both sides of the guide rail, and limiters are threaded onto the limit blocks 23. Screws 24 are used to adjust the limiting distance to the base 12. A limiting piece 25 is fixedly connected to the end of the limiting screw 24 to prevent the end of the screw from scratching the base 12. A crossbar 15 is connected between the two bases 12 by hinge. Guide blocks 16 are provided on both the upper and lower surfaces of the crossbar 15. The guide blocks 16 are slidably disposed in the grooves 18 on the U-shaped block 17. The guide blocks 16 are radial bearings. The outer diameter of the guide blocks 16 is the same as the width of the grooves 18 to reduce the friction between the guide blocks 16 and the grooves 18. The U-shaped block... 17 is fixedly connected to the movable end of the hydraulic cylinder 19. The hydraulic cylinder 19 is mounted on the fixed base 20. The fixed base 20 is fixedly mounted on the upper surface of the mounting base 1. Two mounting holes 21 are opened on the crossbar 15. The two mounting holes 21 are respectively located on both sides of the U-shaped block 17. A second force sensor is installed in the mounting hole 21 to detect the axial force applied to the base 12. A laser displacement sensor 22 is fixed on the mounting base 1. The laser displacement sensor 22 is installed between the two bases 12 to detect the displacement of the base 12.

[0022] The foregoing has shown and described the main features and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, 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. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fatigue testing device for axles of rail transit vehicles capable of applying axial force, characterized in that: The system includes a mounting base (1), on which two actuating cylinders (2) are arranged side by side. A force sensor (3) is installed at the upper end of the actuating cylinder (2). A bearing seat (4) is connected to the upper end of the force sensor (3). An axle (5) is installed between the two bearing seats (4). One end of the axle (5) is connected to the output shaft of a motor (7) via a universal coupling (6). Loading wheels (8) are installed on the left and right sides of the axle (5). A synchronous wheel (9) is arranged below the loading wheel (8). The synchronous wheel (9) is mounted on a bearing seat (10) via a rotating shaft. A synchronous motor (11) is provided between the two synchronous pulleys (9). The output shaft of the synchronous motor (11) is connected to the rotating shaft to drive the two synchronous pulleys (9) to rotate, so that the rotational speed of the synchronous pulleys (9) is consistent with the rotational linear speed of the loading wheel (8). The second bearing seat (10) is mounted on the base (12). A slider (13) is fixedly provided on the lower surface of the base (12). The slider (13) is slidably mounted on the slide rail (14). The slide rail (14) is fixed to the mounting base. (1) A crossbar (15) is connected between the two bases (12) by a hinge. Guide blocks (16) are provided on the upper and lower surfaces of the crossbar (15). The guide blocks (16) are slidably disposed in the grooves (18) on the U-shaped block (17). The U-shaped block (17) is fixedly connected to the movable end of the hydraulic cylinder (19). The hydraulic cylinder (19) is mounted on the fixed seat (20). The fixed seat (20) is fixedly mounted on the upper surface of the mounting base (1).

2. The fatigue testing device for axles of rail transit vehicles capable of applying axial force according to claim 1, characterized in that: Two mounting holes (21) are provided on the crossbar (15). The two mounting holes (21) are respectively located on both sides of the U-shaped block (17). A second force sensor is provided in the mounting hole (21) to detect the axial force applied to the base (12).

3. The fatigue testing device for axles of rail transit vehicles capable of applying axial force according to claim 1, characterized in that: A laser displacement sensor (22) is fixed on the mounting base (1). The laser displacement sensor (22) is installed between the two bases (12) to detect the displacement of the bases (12).

4. The fatigue testing device for axles of rail transit vehicles capable of applying axial force according to claim 1, characterized in that: Limiting blocks (23) are provided on both sides of the slide rail (14).

5. The fatigue testing device for axles of rail transit vehicles capable of applying axial force according to claim 4, characterized in that: A limiting screw (24) is threaded onto the limiting block (23) to facilitate adjustment of the limiting distance to the base (12).

6. The fatigue testing device for axles of rail transit vehicles capable of applying axial force according to claim 5, characterized in that: A limiting piece (25) is fixedly connected to the end of the limiting screw (24) to prevent the end of the screw from scratching the base (12).

7. The fatigue testing device for axles of rail transit vehicles capable of applying axial force according to claim 1, characterized in that: The guide block (16) is a radial bearing. The outer diameter of the guide block (16) is the same as the width of the groove (18) to reduce the friction between the guide block (16) and the groove (18).

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