An automotive main shaft rotational fatigue test bench

Abstract

The present invention provides an automotive main shaft rotational fatigue test bench, comprising a transmission unit, a loading unit, a load output unit and a support unit; the transmission unit, the loading unit and the load output unit are arranged on the support unit, the transmission unit is linked with the loading unit, the loading unit drives a test workpiece to rotate, and the load output unit applies a load to the loading unit. By arranging the transmission unit, the loading unit and the load output unit, the present invention enables the test workpiece to rotate under the action of the transmission unit and bear an external force under the action of the loading unit and the load output unit, so as to simultaneously perform fatigue detection tests on rotational speed and force.

Description

Technical Field

[0001] The present invention relates to the field of rail transit, and particularly to a rotary fatigue test bench for an automotive main shaft. Background Art

[0002] In the field of rail transit, many rotating components such as bearings and motor rotors are prone to fatigue damage and functional failure during use. The existing technologies are insufficient to provide a theoretical basis for supporting the life calculation of rotating components, and vehicle tests also cause certain waste of test time and cost; it is impossible to verify the life and operating conditions of rotating components. Summary of the Invention

[0003] The present invention provides a rotary fatigue test bench for an automotive main shaft to overcome the above technical problems.

[0004] The present invention provides a rotary fatigue test bench for an automotive main shaft, including a transmission unit, a loading unit, a load output unit, and a support unit;

[0005] The transmission unit, the loading unit, and the load output unit are arranged on the support unit. The transmission unit is linked with the loading unit. The loading unit drives the test workpiece to rotate, and the load output unit applies a load to the loading unit.

[0006] Further, the transmission unit includes: a motor, a driving wheel, a driven wheel, and a belt;

[0007] The output end of the motor is connected to the input end of the driving wheel. The driving wheel is connected to the driven wheel through the belt, and the driven wheel is linked with the loading unit and the test workpiece.

[0008] Further, the loading unit includes: a loading disk, a loader, a main beam, and a first support frame;

[0009] The middle of the main beam is movably supported by the first support frame; one end of the main beam is fixedly connected to the loader. The loading disk is fixedly connected to the driven wheel. Both the loading disk and the driven wheel are sleeved on one end of the test workpiece, and the other end of the test workpiece is fixed on a workpiece mounting bracket; the load output unit applies a downward load to the other end of the main beam.

[0010] Further, the loader includes: a loading bearing and a loading bearing fixing plate;

[0011] At least one loading bearing is clamped between two loading bearing fixing plates. The loading bearing is movably connected to the loading bearing fixing plates and contacts the loading disk; the two loading bearing fixing plates are fixedly connected to one end of the main beam.

[0012] Furthermore, the load output unit includes a conventional load output unit and / or a dynamic load output unit.

[0013] Furthermore, the dynamic load output unit includes: a hydraulic cylinder, a loading bracket, and a second support bracket;

[0014] The second support frame is arranged on the support unit, the loading support is movably connected to the second support frame, one end of the loading support is connected to the output end of the hydraulic cylinder, and the other end of the loading support is against the upper surface of the main beam; when the hydraulic cylinder applies force to one end of the loading support, the other end of the loading support applies a downward load to the other end of the main beam.

[0015] Furthermore, the conventional load output unit is a counterweight plate, and the counterweight plate is arranged at the other end of the main beam.

[0016] Furthermore, it also includes: a limiting bracket; the limiting bracket is fixed to the supporting unit, the limiting bracket is provided with a notch, and one end of the main beam fixing the loader is located in the notch.

[0017] Furthermore, the support unit includes: a main board, a fixed steel pipe and a fixed bracket;

[0018] At least two of the fixed steel pipes are arranged below the main board, and the fixed steel pipes are fixedly connected to the main board via the fixing bracket.

[0019] The present invention provides a transmission unit, a loading unit and a load output unit so that the test workpiece rotates under the action of the transmission unit while being subjected to external force under the action of the loading unit and the load output unit, thereby synchronously performing speed and force fatigue detection tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of another perspective of an embodiment of the present invention;

[0023] Figure 3 This is a schematic structural diagram of a load output unit and a loading unit according to an embodiment of the present invention;

[0024] Figure 4 Structural schematic diagram of the position relationship between the loading bracket and the main beam in the embodiment of the present invention;

[0025] Figure 5 Overall structural schematic diagram of the loader in the embodiment of the present invention. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] The present invention provides an automotive spindle rotational fatigue test bench, as Figure 1 shown, including a transmission unit, a loading unit, a load output unit and a support unit;

[0028] The transmission unit, the loading unit and the load output unit are arranged on the support unit. The transmission unit is linked with the loading unit and the test workpiece 5. The loading unit drives the test workpiece 5 to rotate, and the load output unit applies a load to the loading unit.

[0029] Further, the transmission unit includes: a motor 1, a driving wheel 2, a driven wheel 4 and a belt 3; the motor 1 is supported by a motor bracket 17 fixed on the support unit. The output end of the motor 1 is connected to the input end of the driving wheel 2. The driving wheel 2 is connected to the driven wheel 4 through the belt 3. The driven wheel 4 is linked with the loading unit. The motor outputs rotational torque, and through belt transmission, the torque is transmitted to the driven wheel. In this embodiment, the test workpiece is an automotive spindle. The driven wheel and the loading disc are both connected to the automotive spindle, and finally the automotive spindle reaches a predetermined rotational speed.

[0030] Further, the loading unit includes: a loading disc 6, a loader 11, a main beam 16 and a first support frame 15. The first support frame 15.1;

[0031] The middle part of the main beam 16 is movably supported by the first support frame 15.1. The first support frame 15.1 is composed of two vertical plates vertically fixed on the support unit. The main beam 16 is arranged between the two vertical plates. A first fixed shaft 15.2 penetrates through the middle part of the main beam 16, and both ends of the first fixed shaft 15.2 are fixedly connected to the two vertical plates. The main beam 16 can rotate around the first fixed shaft 15.2. One end of the main beam 16 is fixedly connected to the loader 11. The loading disk 6 is fixedly connected to the driven wheel 4. Both the loading disk 6 and the driven wheel 4 are sleeved on one end of the test workpiece 5. The other end of the test workpiece 5 is fixed on the workpiece mounting bracket 7. The load output unit applies a downward load to the other end of the main beam 16. At this time, the end of the main beam where the loader 11 is fixed lifts upward. Meanwhile, the loader 11 applies a force to the loading disk. At the same time, the motor drives the driving wheel to rotate, and then drives the driven wheel and the loading disk fixed thereon to rotate synchronously through the belt, so that the test workpiece 5 reaches a predetermined rotational speed while being stressed, and a comprehensive fatigue test is carried out.

[0032] Further, as Figure 5 shown, the loader 11 includes: a loading bearing 11.1 and a loading bearing fixing plate 11.2;

[0033] Two loading bearings 11.1 are clamped between the two loading bearing fixing plates 11.2. The loading bearing 11.1 is movably connected to the loading bearing fixing plate 11.2. The loading bearing 11.1 can rotate between the loading bearing fixing plates 11.2. The loading bearing 11.1 contacts the loading disk 6. The two loading bearing fixing plates 11.2 are fixedly connected to one end of the main beam 16. The loading bearing 11.1 and the loading disk 6 move relative to each other. The load applied by the load output unit is transmitted to the loading disk 6 through the loading bearing 11.1.

[0034] Further, the load output unit includes a conventional load output unit and / or a dynamic load output unit.

[0035] Further, in this embodiment, the dynamic load output unit includes: a hydraulic cylinder 23, a loading bracket 20, and a second support frame 18.1;

[0036] The second support frame 18.1 is arranged on the support unit. The loading bracket 20 is movably connected to the second support frame 18.1. One end of the loading bracket 20 is connected to the output end of the hydraulic cylinder 23, as Figure 2 and Figure 3As shown, the hydraulic cylinder 23 is supported on the support unit through the cylinder bracket 22, and the other end of the loading bracket 20 abuts against the upper surface of the main beam 16; when the hydraulic cylinder 23 applies a force to one end of the loading bracket 20, the other end of the loading bracket 20 applies a downward load to the other end of the main beam 16.

[0037] Specifically, as Figure 4 shown, the second support frame 18.1 is two triangular steel plates vertically fixed on the support unit; the loading bracket 20 is two L-shaped steel plates. One ends of the two L-shaped steel plates are fixedly connected to the output end of the hydraulic cylinder 23. The right-angle corners of the two L-shaped steel plates are connected to the triangular steel plates through the second fixed shaft 18.2. The second fixed shaft 18.2 passes through the right-angle corners of the two L-shaped steel plates, and both ends of the second fixed shaft 18.2 are fixedly connected to the two triangular steel plates respectively; the other ends of the two L-shaped steel plates abut against the top surface of the main beam. When the hydraulic cylinder 23 applies a force to one end of the L-shaped steel plate, the L-shaped steel plate rotates around the second fixed shaft 18.2, so that the other end of the L-shaped steel plate presses down the main beam to apply a downward load, and an intermittent impact load is applied to the test workpiece 5 through the hydraulic cylinder 23 for fatigue testing.

[0038] Further, a continuous and stable load is applied to the test workpiece 5. The conventional load output unit is a counterweight plate 21, and the counterweight plate 21 is arranged at the other end of the main beam 16; the counterweight plate 21 is used to place counterweight blocks. The counterweight blocks can be iron blocks or other structures that can apply a downward force to the other end of the main beam. The mass of the counterweight blocks is adjusted according to the leverage ratio to apply a conventional load.

[0039] Further, it further includes: a limit bracket 13; the limit bracket 13 is fixed to the support unit, and the limit bracket 13 is provided with a notch, and one end of the main beam 16 where the loader 11 is fixed is located in the notch.

[0040] Specifically, the limit bracket 13 is a steel plate with a notch. The limit bracket 13 is fixedly connected to the support unit through a plurality of fixing blocks 12. One end of the main beam 16 where the loader 11 is fixed is located in the notch to ensure that the main beam will not move downward, so that the loading bearing 11.1 is far away from the loading plate, resulting in the consequence of being unable to apply a load to the loading plate, and at the same time preventing the loader from moving in the horizontal direction and deviating from the load loading position; making the whole structure simple and compact.

[0041] Further, the support unit includes: a main board 8, a fixed steel pipe 9 and a fixed bracket 14;

[0042] At least two of the fixed steel pipes 9 are arranged below the main board 8. The main board 8 is a stainless steel board. The fixed steel pipe 9 and the main board 8 are fixedly connected through the fixed bracket 14, so that each structure on the main board 8 can operate stably.

[0043] The working principle of the present invention is as follows:

[0044] According to the test purpose, the belt is driven by the motor to rotate the test workpiece at the required speed. A certain weight is placed on the weight plate, and through the lever mechanism of the main beam, the loader acts on the rotating test workpiece to apply a conventional load. Set the working time and pressure value of the hydraulic cylinder, and transfer the force of the cylinder to the main beam through the loading bracket, and finally achieve the purpose of the loader applying an impact load.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automotive main shaft rotational fatigue test bench, characterized in that, It includes a transmission unit, a loading unit, a load output unit, and a support unit; The transmission unit, the loading unit, and the load output unit are arranged on the support unit. The transmission unit is linked with the loading unit. The loading unit drives the test workpiece (5) to rotate, and the load output unit applies a load to the loading unit; The load output unit includes a conventional load output unit and a dynamic load output unit; The conventional load output unit is a counterweight plate (21), and the counterweight plate (21) is arranged at the other end of the main beam (16); The dynamic load output unit includes: a hydraulic cylinder (23), a loading bracket (20), and a second support frame (18.1); The second support frame (18.1) is arranged on the support unit. The loading bracket (20) is movably connected with the second support frame (18.1). One end of the loading bracket (20) is connected to the output end of the hydraulic cylinder (23), and the other end of the loading bracket (20) abuts against the upper surface of the main beam (16). When the hydraulic cylinder (23) applies a force to one end of the loading bracket (20), the other end of the loading bracket (20) applies a downward load to the other end of the main beam (16).

2. The automotive main shaft rotational fatigue test bench according to claim 1, characterized in that, The transmission unit includes: a motor (1), a driving wheel (2), a driven wheel (4), and a belt (3); The output end of the motor (1) is connected to the input end of the driving wheel (2). The driving wheel (2) is connected to the driven wheel (4) through the belt (3), and the driven wheel (4) is linked with the loading unit and the test workpiece (5).

3. The automotive main shaft rotational fatigue test bench according to claim 2, wherein The loading unit includes: a loading disc (6), a loader (11), a main beam (16), and a first support frame (15.1); The middle part of the main beam (16) is movably supported by the first support frame (15.1). One end of the main beam (16) is fixedly connected to the loader (11). The loading disc (6) is fixedly connected to the driven wheel (4). The loading disc (6) and the driven wheel (4) are both sleeved on one end of the test workpiece (5). The other end of the test workpiece (5) is fixed on a workpiece mounting bracket (7). The load output unit applies a downward load to the other end of the main beam (16).

4. The automotive main shaft rotational fatigue test bench according to claim 3, wherein, The loader (11) includes: a loading bearing (11.1) and a loading bearing fixing plate (11.2); At least one loading bearing (11.1) is clamped between two loading bearing fixing plates (11.2). The loading bearing (11.1) is movably connected with the loading bearing fixing plates (11.2), and the loading bearing (11.1) contacts the loading disc (6). Two loading bearing fixing plates (11.2) are fixedly connected to one end of the main beam (16).

5. The automotive spindle rotational fatigue test bench according to claim 4, characterized in that, It further includes: A limit bracket (13); the limit bracket (13) is fixed to the support unit. The limit bracket (13) is provided with a notch, and one end of the main beam (16) where the loader (11) is fixed is located in the notch.

6. The automotive spindle rotational fatigue test bench according to claim 1, characterized in that, The support unit includes: a main board (8), a fixed steel pipe (9), and a fixed bracket (14); At least two of the fixed steel pipes (9) are arranged below the main board (8), and the fixed steel pipes (9) are fixedly connected to the main board (8) through the fixed brackets (14).

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