Wheel fatigue testing device

Abstract

The utility model discloses a wheel fatigue testing device, which belongs to the field of wheel testing, solves the problems of single testing factor and limited testing results, and mainly adopts the technical scheme that the wheel fatigue testing device comprises a box body and a closed cavity in the box body, a pavement simulation device, a telescopic rod, a heating box and a temperature sensor are arranged in the cavity, one end of the telescopic rod is installed on the box body, and the other end of the telescopic rod is provided with a rotating device capable of installing and driving wheels to rotate; the telescopic rod can stretch out and draw back to drive wheels on the rotating device to abut against the road surface simulation device or be separated from the road surface simulation device, the road surface simulation device is provided with a plurality of different simulation road surfaces, and the heating box and the temperature sensor are installed on the inner side wall of the cavity. According to the utility model, the heating box in the cavity can simulate the environment temperature, and the accuracy and comprehensiveness of test data are improved.

Description

Technical Field

[0001] The utility model relates to the field of wheel testing, in particular to a wheel fatigue testing device. Background Art

[0002] Tires are an important part of the vehicle body, and their safety performance also affects driving safety, which requires fatigue testing of vehicles. Wheel fatigue usually refers to the fatigue damage of the wheels of cars or other vehicles due to long-term use or the influence of external environmental factors. Wheel fatigue may cause tire surface wear, cracks, reduced air pressure or even tire blowout, posing a threat to driving safety.

[0003] Existing testing devices usually only test the degree of wear of wheels at room temperature, and the wheels usually rotate at high speed and rub against the plane for wear resistance testing. This type of test factors is relatively single, the test results are also relatively limited, and the data is not accurate and comprehensive enough. Utility Model Content

[0004] The utility model aims to provide a wheel fatigue testing device, which solves the problem of single testing factor and limited testing results, and realizes the testing of tire performance under conditions of multiple temperatures and multiple road surfaces.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes a box body and a closed cavity in the box body, the cavity is provided with a road surface simulation device, a telescopic rod, a heating box and a temperature sensor, one end of the telescopic rod is installed on the box body, and the other end of the telescopic rod is provided with a rotating device that can be installed and drive the wheel to rotate, the telescopic rod can be extended and retracted to drive the wheel on the rotating device to press against or detach from the road surface simulation device, the road surface simulation device has multiple different simulated road surfaces, and the heating box and temperature sensor are installed on the inner wall of the cavity.

[0006] After adopting the above technical scheme, the utility model has the following advantages: the heating box in the cavity can simulate various temperatures of the environment; and the simulated road surface device can test the performance of the wheel under high-speed rotation and friction on different road surfaces, thereby improving the accuracy and comprehensiveness of the test data.

[0007] Furthermore, the top wall of the cavity is rotatably connected to a rotating disk, a steering motor is installed on the outside of the box, the rotating disk is driven by the steering motor, and the end of the telescopic rod away from the rotating device is connected to the rotating disk. By adopting the above-mentioned technical solution, the wheel can be rotated in the horizontal direction, which can make the wheel more in line with the actual force conditions.

[0008] Furthermore, a limiting arc groove is provided on the top wall of the cavity, a sliding member is fixedly connected to the rotating disk, and the sliding member and the limiting groove are matched. The above-mentioned technical solution can increase the accuracy of the test and ensure the stability of the rotating disk during rotation.

[0009] Furthermore, the rotating device includes a fixed frame, a frame for mounting wheels, and a rotating motor. The fixed frame is mounted on the end of the telescopic rod, the frame is rotatably connected to the fixed frame, the rotating motor is mounted on the fixed frame, and the rotating shaft of the rotating motor is fixedly connected to the frame. By adopting the above-mentioned technical solution, the rotation speed of the wheel can be controlled, thereby increasing the accuracy of the test.

[0010] Furthermore, the simulated road surface device includes a fixing seat and a road surface simulation board, and the road surface simulation board and the fixing seat are detachably connected. By adopting the above-mentioned technical solution, different road surface conditions can be simulated by the road surface simulation board, thereby increasing the diversity of the test.

[0011] Furthermore, the fixing seat includes an installation cavity and limit blocks arranged on both sides of the installation cavity. A baffle is slidably arranged at the entrance of the installation cavity. A telescopic spring is arranged between the baffle and the box body or the fixing seat to make the baffle extend upward. By adopting the above-mentioned technical solution, the positioning and fixing of the baffle can make the installation of the road simulation board convenient and efficient.

[0012] Furthermore, the box body is provided with heat dissipation holes connecting the cavity and the outside. The above-mentioned technical solution can avoid excessively low air pressure in the cavity and ensure the exchange of gas inside and outside the cavity.

[0013] Furthermore, the heating box is heated by an electric heating tube, and a temperature control switch is provided outside the box body. The temperature control switch can control the temperature of the heating box, and the operating table of the temperature control switch is a touch screen. By adopting the above-mentioned technical solution, the test temperature inside the cavity can be accurately controlled.

[0014] Furthermore, the box body is equipped with a box door connecting the cavity and the outside, and the box door is provided with an observation window. By adopting the above-mentioned technical solution, the staff can observe the wear status of the internal vehicle through the observation window.

[0015] Furthermore, the rotating disk is connected to one or two telescopic rods. By adopting the above-mentioned technical solution, it is possible to simulate the actual wheel usage when one telescopic rod is used, and to test the extreme working conditions of the wheel when two telescopic rods are used. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of a wheel fatigue testing device of the utility model;

[0018] Figure 2 is a front view of a wheel fatigue testing device;

[0019] Figure 3 A side sectional view of a wheel fatigue testing device;

[0020] Figure 4 It is the cross-sectional view at point A;

[0021] Figure 5 It is the cross-sectional view at point B;

[0022] Figure 6 It is a cross-sectional view from the left side of the simulated road surface device and the bottom wall of the cavity.

[0023] The reference numerals are: 1, box body; 11, steering motor; 12, temperature control switch;

[0024] 2. Cavity; 21. Rotating disk; 211. Sliding member;

[0025] 22. Telescopic rod;

[0026] 23. Rotating device; 231. Vehicle frame; 232. Rotating motor;

[0027] 24. Heating box; 241. Electric heating tube;

[0028] 25. Simulated road surface device; 251. Baffle; 252. Road surface simulation board; 253. Telescopic spring; 254. Fixed seat;

[0029] 26. Limiting groove; 27. Heat dissipation hole; 28. Temperature sensor;

[0030] 29. Box door; 291. Observation window. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0032] The terms "first", "second", etc. (if any) in the specification and claims of the present utility model are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily mean that it has "first". It should be understood that in the present utility model, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present utility model, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0033] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0034] Embodiment 1:

[0035] like Figures 1 to 5 As shown, the utility model provides a wheel fatigue testing device, a wheel fatigue testing device, comprising a box body 1 and a closed cavity 2 in the box body 1, wherein the cavity 2 is provided with a road surface simulation device, a telescopic rod 22, a heating box 24 and a temperature sensor 28, one end of the telescopic rod 22 is installed on the box body 1, and the other end of the telescopic rod 22 is provided with a rotating device 23 capable of installing and driving the wheel to rotate, the telescopic rod 22 can be extended and retracted to drive the wheel on the rotating device 23 to press against or detach from the road surface simulation device, the road surface simulation device 25 has a plurality of different simulated road surfaces, and the heating box 24 and the temperature sensor 28 are installed on the inner wall of the cavity 2.

[0036] After adopting the above technical scheme, the utility model has the following advantages: the heating box 24 in the cavity 2 can simulate various temperatures of the environment; and the simulated road surface device 25 can test the performance of the wheel under high-speed rotation and friction with different road surfaces, thereby improving the accuracy and comprehensiveness of the test data.

[0037] Embodiment 2:

[0038] On the basis of Example 1, Figures 1 to 5As shown, further, the top wall of the cavity 2 is rotatably connected with a rotating disk 21, and a steering motor 11 is installed on the outside of the box body 1. The rotating disk 21 is driven by the steering motor 11, and the end of the telescopic rod 22 away from the rotating device 23 is connected to the rotating disk 21. The top wall of the cavity 2 is provided with a limiting arc groove, and a sliding member 211 is fixedly connected to the rotating disk 21, and the sliding member 211 is adapted to the limiting groove 26. By adopting the aforementioned technical scheme, the accuracy of the test can be increased and the stability of the rotating disk 21 during rotation can be ensured. By adopting the aforementioned technical scheme, the test wheel is in a vertical direction, which can make the wheel more in line with the stress conditions of daily use, increase the accuracy of the test and ensure the stability of the rotating disk 21 during rotation, and make the rotation speed and angle of the rotating disk 21 accurate, controllable and easy to reproduce.

[0039] Specifically, a steering motor 11 is installed on the top of the box body 1. The rotating shaft of the steering motor 11 extends into the cavity 2 and is fixedly connected to the rotating disk 21, which can drive the rotating disk 21 to rotate at a certain angle. The sliding member 211 rotates in the limiting groove 26 to make the rotation of the rotating disk 21 more stable.

[0040] Furthermore, in order to realize data visualization and digitization during the test, the rotating device 23 used includes a fixed frame, a frame 231 for mounting wheels, and a rotating motor 232. The fixed frame is mounted on the end of the telescopic rod 22, the frame 231 is rotatably connected to the fixed frame, the rotating motor 232 is mounted on the fixed frame, and the rotating shaft of the rotating motor 232 is fixedly connected to the frame 231. The above-mentioned technical solution can make the rotation speed of the wheel controllable, thereby increasing the accuracy of the test.

[0041] Specifically, the rotation speed of the rotating motor 232 can be adjusted, for example, to 80km / h, 100km / h, 120km / h, etc. A plurality of screw holes are provided on the frame 231, and the tested wheel is fixedly connected to the frame by bolts, thereby facilitating the rotation test. The rotating motor 232 drives the frame 231 to rotate, and the frame 231 drives the wheel to rotate and test.

[0042] Furthermore, in order to allow the wheels to be tested under different road conditions, the simulated road surface device 25 used includes a fixed seat 254 and a road surface simulation plate 252. The road surface simulation plate 252 and the fixed seat 254 are detachably connected. The fixed seat 254 includes an installation cavity and limit blocks arranged on both sides of the installation cavity. A baffle 251 is slidably arranged at the entrance of the installation cavity. A telescopic spring is arranged between the baffle 251 and the box body 1 or the fixed seat, which is used to make the baffle 251 extend upward to stop the road surface simulation plate in the installation cavity and prevent the road surface simulation plate from falling out of the installation cavity. When disassembling, it only needs to press the baffle 251 to make it lower than the bottom surface of the installation cavity, and the road surface simulation plate 252 can be pulled out for replacement.

[0043] By adopting the above-mentioned technical solution, different road conditions can be simulated by the road simulation board 252, thereby increasing the diversity of the test.

[0044] Specifically, when replacing the road simulation board 252, the baffle 251 is pressed down to overcome the elastic force of the telescopic spring 253, and then the road simulation board 252 is pulled out from the fixing seat 254, and then the new road simulation board 252 is placed in the fixing seat 254, and the baffle 251 is released to complete the positioning of the road simulation board 252.

[0045] It can be understood that the baffle 252 is provided with a slope from bottom to top, and this slope faces the box door, and the horizontal surface below is connected to the telescopic spring 253, so that the road surface simulation plate 252 can be directly pushed into the installation cavity, and the road surface simulation plate can press the baffle down by contacting the slope, so that the baffle can be installed into the installation cavity without manually pressing the baffle, and the position of the road surface simulation plate is fixed to prevent it from shaking.

[0046] Furthermore, in order to ensure that the air pressure in the cavity is uniform and the temperature is controllable, the box 1 is provided with a heat dissipation hole 27 connecting the cavity 2 and the outside, the heating box 24 is heated by an electric heating tube 241, and a temperature control switch 12 is provided outside the box 1. The temperature control switch 12 can control the temperature of the heating box 24, and the operating table of the temperature control switch 12 is a touch screen. The above-mentioned technical solution can avoid the air pressure in the cavity 2 being too low, ensure the exchange of gas inside and outside the cavity 2, and can accurately control the test temperature in the cavity 2.

[0047] Furthermore, in order to clearly observe the wear condition of the wheels, the box body 1 is provided with an installation opening for convenient installation of wheels and road simulation boards, and a box door 29 for closing the installation opening is installed at the installation opening, and an observation window 291 is provided on the box door 29. The above-mentioned technical solution is adopted so that the staff can observe the internal wheel wear status through the observation window 291.

[0048] Furthermore, in order to test different performances of the wheels, the rotating disk 21 is connected to one or two telescopic rods 22. By adopting the above-mentioned technical solution, the actual wheel usage can be simulated when one telescopic rod 22 is used, and the extreme working conditions of the wheel can be tested when two telescopic rods 22 are used.

[0049] It can be understood that in one embodiment, the rotating disk 21 is connected to a telescopic rod 22 to simulate the fatigue strength of the wheel under normal use.

[0050] It can be understood that in another embodiment, the rotating disk 21 is connected to two telescopic rods 22, a rotating device 23 is installed on one of the telescopic rods, and a fixed block is installed on the other telescopic rod. The wheel can be rotatably connected to the fixed block, and the different upper and lower positions of the two telescopic rods 22 can simulate the situation where the wheel is loaded when turning, so as to test the condition of the wheel under extreme working conditions.

[0051] Specifically, when testing the wheel, the wheel is installed in the screw hole on the frame 231 with bolts, and then the required road simulation board 252 is selected and inserted into the fixing seat 254, and the road simulation board 252 is positioned and fixed with the baffle 251, and the telescopic rod 22 is started to press the wheel down to the surface of the road simulation board 252. It can be understood that when two telescopic rods 22 are used, the wheel can be tested for roll, that is, the two telescopic rods 22 have different telescopic lengths, so that the wheel has a certain horizontal tilt angle, and then the box door 29 is closed, and the temperature is adjusted to a predetermined simulation temperature on the touch screen of the temperature control switch 12 and maintained, and the rotating motor 232 is started to drive the wheel on the frame 231 to rotate, so that the wheel is subjected to a thermal fatigue test. At the same time, during the test, the steering motor 11 can be started to rotate the rotating disk 21 to drive the wheel to perform a simulated turning test, so as to collect various test data.

[0052] In another embodiment, the difference is that the telescopic lengths of the two telescopic rods 22 are the same, and a greater force is applied to the wheel, so that the performance of the wheel under extreme pressure and temperature can be tested.

[0053] In another embodiment, the difference is that only one telescopic rod 22 is used to perform the fatigue test of the wheel, and the force applied is not large, which is the pressure applied to the wheel by the weight of a normal vehicle, and the performance of the wheel under normal conditions can be tested.

[0054] It can be understood that the telescopic rod 22 can be an electric telescopic rod.

[0055] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A wheel fatigue testing device, characterized in that: It includes a box body and a closed cavity in the box body, wherein the cavity is provided with a road surface simulation device, a telescopic rod, a heating box and a temperature sensor, one end of the telescopic rod is installed on the box body, and the other end of the telescopic rod is provided with a rotating device capable of installing and driving the wheel to rotate, the telescopic rod can be extended and retracted to drive the wheel on the rotating device to contact with or detach from the road surface simulation device, the road surface simulation device has multiple different simulated road surfaces, and the heating box and the temperature sensor are installed on the inner wall of the cavity.

2. A wheel fatigue testing device according to claim 1, characterized in that: The top wall of the cavity is rotatably connected with a rotating disk, a steering motor is installed on the outside of the box, the rotating disk is driven by the steering motor, and one end of the telescopic rod away from the rotating device is connected to the rotating disk.

3. A wheel fatigue testing device according to claim 2, characterized in that: The top wall of the cavity is provided with a limiting groove, and a sliding member is fixedly connected to the rotating disk. The sliding member is adapted to the limiting groove, and the sliding member can rotate around the axis of the steering motor in the limiting groove.

4. A wheel fatigue testing device according to any one of claims 1 to 3, characterized in that: The rotating device includes a fixed frame, a frame for mounting wheels, and a rotating motor. The fixed frame is mounted on the end of the telescopic rod, the frame is rotatably connected to the fixed frame, the rotating motor is mounted on the fixed frame, and the rotating shaft of the rotating motor is fixedly connected to the frame.

5. A wheel fatigue testing device according to any one of claims 1 to 3, characterized in that: The road surface simulation device comprises a fixing seat and a plurality of road surface simulation plates for simulating different road surfaces, and the road surface simulation plates and the fixing seat are detachably connected.

6. A wheel fatigue testing device according to claim 5, characterized in that: The fixing seat includes an installation cavity and limit blocks arranged on both sides of the installation cavity. The road surface simulation board is installed into the installation cavity through the entrance of the installation cavity. A baffle is slidably arranged at the entrance of the installation cavity. A telescopic spring is arranged between the baffle and the box body or the fixing seat. The telescopic spring drives the baffle to extend upward to stop the road surface simulation board.

7. A wheel fatigue testing device according to any one of claims 1 to 3, characterized in that: The box body is provided with heat dissipation holes communicating with the cavity and the outside.

8. A wheel fatigue testing device according to any one of claims 1 to 3, characterized in that: The heating box is heated by an electric heating tube, and a temperature control switch is arranged outside the box. The temperature control switch can control the temperature of the heating box, and the operating table of the temperature control switch is a touch screen.

9. A wheel fatigue testing device according to any one of claims 1 to 3, characterized in that: The box body is provided with an installation opening for conveniently installing wheels and road simulation plates, a box door for closing the installation opening is installed at the installation opening, and an observation window is provided on the box door.

10. A wheel fatigue testing device according to any one of claims 2 to 3, characterized in that: The rotating disk is connected with one or two telescopic rods.

Images