Test device and test method for drive axle oil temperature sensor

Abstract

The application provides a test device and a test method for a drive axle oil temperature sensor. The test device comprises: a power input device connected with a drive axle assembly, the power input device being used for providing power for the drive axle assembly; at least one load loading device connected with the drive axle assembly, the load loading device being used for applying a load to the drive axle assembly; and a vibration simulation device connected with the drive axle assembly, the vibration simulation device being used for providing a road vibration simulation for the drive axle assembly. According to the technical scheme of the application, the vibration simulation device can simulate the vibration environment in the vehicle road test, and the difficulty that the drive axle oil temperature sensor lacks the vibration environment in the vehicle road test in the design stage and can only be verified in the road test is solved. The test device in the scheme exposes the drive axle problem in the sample trial stage, shortens the design cycle, and reduces the design cost.

Description

Technical Field

[0001] This invention relates to the field of vehicle testing technology, and more specifically, to a test apparatus and test method for a drive axle oil temperature sensor. Background Technology

[0002] The prior art discloses a test device and test method for automatic switching of drive axle transmission efficiency, which is used to test the drive axle transmission efficiency. However, since the drive axle oil temperature sensor lacks a full vehicle road test vibration environment during the design stage, it can only be verified in road tests. This makes the final test results inaccurate and makes it impossible to detect drive axle problems in time during the prototype manufacturing stage, which makes subsequent development more difficult and costly. Summary of the Invention

[0003] The main objective of this invention is to provide a test device and test method for a drive axle oil temperature sensor, so as to solve the technical problem that the drive axle oil temperature sensor in the prior art lacks a full vehicle road test vibration environment during the design stage.

[0004] To achieve the above objectives, according to one aspect of the present invention, a testing apparatus for a drive axle oil temperature sensor is provided, comprising: a power input device connected to a drive axle assembly, the power input device being used to provide power to the drive axle assembly; a load loading device, at least one load loading device connected to the drive axle assembly, the load loading device being used to apply a load to the drive axle assembly; and a vibration simulation device connected to the drive axle assembly, the vibration simulation device being used to provide road vibration simulation for the drive axle assembly.

[0005] Furthermore, the vibration simulation device includes: a vibration device for providing road vibration simulation for the drive axle assembly, the input end of the vibration device being provided with a connecting device; and a vibration device motor, the output shaft of the vibration device motor being provided with a motor flange, the vibration device motor being connected to the vibration device through the motor flange and the connecting device.

[0006] Further, the vibration device includes: a worktable; a first cover plate disposed on the worktable; a second cover plate, the first cover plate and the second cover plate being disposed at a distance along the height direction of the worktable, and a drive axle assembly being disposed on the surface of the second cover plate away from the worktable; a cam structure having a camshaft connected to a connecting device, the cam structure being disposed between the first cover plate and the second cover plate, the cam structure rotating to drive the second cover plate to move along the height direction of the worktable, thereby providing road vibration simulation for the drive axle assembly; and a support spring, the first end of the support spring being connected to the first cover plate, the second end of the support spring being connected to the second cover plate, and at least one support spring.

[0007] Furthermore, there are two support springs, which are respectively located near the two ends of the first cover plate, and the cam structure is located between the two support springs.

[0008] Furthermore, there are two cam structures, which are symmetrically arranged about the geometric center line of the second cover plate in the height direction.

[0009] Furthermore, the vibration device also includes a limiting post, which is disposed between the first cover plate and the second cover plate.

[0010] Furthermore, the power input device includes: an input motor, on the output shaft of which a first flange is provided; a first drive shaft, the first end of which is connected to the first flange; a first coupling, the first end of which is connected to the second end of the first drive shaft; and an input drive shaft, the first end of which is connected to the second end of the first coupling, and the second end of which is connected to the drive axle assembly.

[0011] Furthermore, there are two load loading devices, which are respectively located on both sides of the drive axle assembly.

[0012] Furthermore, the load loading device includes: a loading motor, on the output shaft of which a second flange is provided; a second drive shaft, the first end of which is connected to the second flange; a second coupling, the first end of which is connected to the second end of the second drive shaft; and a half shaft, the first end of which is connected to the second end of the second coupling, and the second end of which is connected to the drive axle assembly.

[0013] According to another aspect of the present invention, a test method for a drive axle oil temperature sensor is provided. The method uses the aforementioned test apparatus for the drive axle oil temperature sensor and includes: S1, assembling the drive axle assembly with the test apparatus, and turning on the power input device and load loading device to test run the drive axle assembly; S2, after the test run, uniformly spraying a developer onto the mating surface of the drive axle oil temperature sensor and the drive axle housing, and allowing it to stand still for a preset time; S3, lowering the ambient temperature to a preset temperature, and allowing the test apparatus and drive axle assembly to stand still at the preset temperature for a first preset time; S4, turning on the vibration device, and based on a first preset vehicle speed, inputting a first preset rotational speed to the drive axle assembly through the power input device, recording the value of the drive axle oil temperature sensor at this time as the first oil temperature, and controlling the drive axle assembly to run for a second preset time; S5, turning on the vibration device, and based on the second preset... S3: Vehicle speed, power input device inputs a second preset speed to drive axle assembly, records the value of drive axle oil temperature sensor at this time as the second oil temperature, and controls drive axle assembly to run for a third preset time; S6: Vibration device is activated, based on the third preset vehicle speed, power input device inputs a third preset speed to drive axle assembly, records the value of drive axle oil temperature sensor at this time as the third oil temperature, and controls drive axle assembly to run for a fourth preset time; S7: Vibration device is activated, based on the maximum vehicle speed, power input device inputs a fourth preset speed to drive axle assembly, records the value of drive axle oil temperature sensor at this time as the fourth oil temperature, and controls drive axle assembly to run for a fifth preset time; Steps S3 to S7 constitute one cycle, and the cycle is repeated a preset number of times; when oil leakage occurs on the outer surface of the oil temperature sensor, the test is stopped and the location of the oil leakage and the number of completed test cycles are recorded.

[0014] The test device using the technical solution of this invention includes a power input device, a load loading device, and a vibration simulation device. The vibration simulation device can simulate the vibration environment in the road test of a whole vehicle, which solves the problem that the drive axle oil temperature sensor lacks the vibration environment of a whole vehicle road test during the design stage and can only be verified in road tests. The test device in this solution exposes drive axle problems in the prototype manufacturing stage, shortens the design cycle, and reduces design costs. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of a first embodiment of a test apparatus for a drive axle oil temperature sensor according to the present invention is shown;

[0017] Figure 2 A schematic diagram of a second embodiment of the test apparatus for the drive axle oil temperature sensor according to the present invention is shown.

[0018] The above figures include the following reference numerals:

[0019] 1. Power input device; 10. Drive axle assembly; 11. Input motor; 12. First flange; 13. First drive shaft; 14. First bearing housing; 15. First coupling; 16. Input drive shaft;

[0020] 2. Loading device; 21. Loading motor; 22. Second flange; 23. Second drive shaft; 24. Second bearing housing; 25. Second coupling; 26. Half shaft; 27. Motor support;

[0021] 3. Vibration simulation device; 31. Vibration device; 32. Connecting device; 33. Vibration device motor; 34. Motor flange;

[0022] 310. Worktable; 311. First cover plate; 312. Second cover plate; 313. Camshaft; 314. Support spring; 315. Limiting post. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0027] Combination Figures 1 to 2 As shown, according to a specific embodiment of this application, a test device for a drive axle oil temperature sensor is provided.

[0028] The test apparatus includes a power input device 1, a load loading device 2, and a vibration simulation device 3. The power input device 1 is connected to the drive axle assembly 10 and is used to provide power to the drive axle assembly 10. There is at least one load loading device 2, which is connected to the drive axle assembly 10 and is used to apply a load to the drive axle assembly 10. The vibration simulation device 3 is connected to the drive axle assembly 10 and is used to provide road vibration simulation for the drive axle assembly 10.

[0029] The test device using the technical solution of this embodiment includes a power input device 1, a load loading device 2, and a vibration simulation device 3. The vibration simulation device 3 can simulate the vibration environment in the road test of a whole vehicle, which solves the problem that the drive axle oil temperature sensor lacks the vibration environment of a whole vehicle road test in the design stage and can only be verified in the road test. The test device in this solution exposes the drive axle problem in the prototype manufacturing stage, shortens the design cycle, and reduces the design cost.

[0030] Furthermore, the vibration simulation device 3 includes a vibration device 31 and a vibration device motor 33. The vibration device 31 is used to provide road vibration simulation for the drive axle assembly 10, and a connecting device 32 is provided at the input end of the vibration device 31. A motor flange 34 is provided on the output shaft of the vibration device motor 33, and the vibration device motor 33 is connected to the vibration device 31 through the motor flange 34 and the connecting device 32. The vibration device motor 33 is used to provide driving force to the vibration device 31, and the motor flange 34 and the connecting device 32 are used to transmit driving force.

[0031] Furthermore, the vibration device 31 includes a worktable 310, a first cover plate 311, a second cover plate 312, a cam structure, and a support spring 314. The first cover plate 311 is disposed on the worktable 310. The first cover plate 311 and the second cover plate 312 are disposed at a distance along the height direction of the worktable 310. The drive axle assembly 10 is disposed on the surface of the second cover plate 312 away from the worktable 310. The cam structure has a camshaft 313, which is connected to the connecting device 32. The cam structure is disposed between the first cover plate 311 and the second cover plate 312. The rotation of the cam structure drives the second cover plate 312 to move along the height direction of the worktable 310 to provide road vibration simulation for the drive axle assembly 10. The first end of the support spring 314 is connected to the first cover plate 311, and the second end of the support spring 314 is connected to the second cover plate 312. There is at least one support spring 314. By setting a cam structure and utilizing its own structural characteristics, the second cover plate 312 can be pushed to move along the height direction of the worktable 310 during the rotation of the cam structure, simulating road vibration. The operator can simulate various vibration conditions by adjusting the rotation speed and volume of the cam structure, making the test results of the drive axle more accurate. The support spring 314 is conducive to the reset of the second cover plate 312.

[0032] Furthermore, there are two support springs 314, which are respectively located near both ends of the first cover plate 311, and the cam structure is located between the two support springs 314. The two support springs 314 allow for smoother movement and resetting of the first cover plate 311, maintain a relatively stable distance between the first cover plate 311 and the second cover plate 312, and allow the first cover plate 311 to return to its initial position after moving with the cam structure.

[0033] Furthermore, there are two cam structures, symmetrically arranged about the geometric center line of the second cover plate 312 in the height direction. The use of two cam structures allows for a more realistic simulation of road vibration environments during vehicle operation, such as unilateral and bilateral vibrations, resulting in more accurate test results.

[0034] It should be noted that the number and position of the cam structures can be adjusted according to actual needs. For example, four cam structures can be set, and the four cam structures are symmetrical about the geometric center of the second cover plate 312.

[0035] Furthermore, the vibration device 31 also includes a limiting post 315, which is disposed between the first cover plate 311 and the second cover plate 312. The limiting post 315 has a positioning and guiding function, making the assembly of the first cover plate 311 and the second cover plate 312 more convenient and accurate.

[0036] Furthermore, the power input device 1 includes an input motor 11, a first drive shaft 13, a first coupling 15, and an input drive shaft 16. A first flange 12 is provided on the output shaft of the input motor 11; the first end of the first drive shaft 13 is connected to the first flange 12; the first end of the first coupling 15 is connected to the second end of the first drive shaft 13; the first end of the input drive shaft 16 is connected to the second end of the first coupling 15, and the second end of the input drive shaft 16 is connected to the drive axle assembly 10. By configuring the input motor 11, the first drive shaft 13, the first coupling 15, and the input drive shaft 16, power input to the drive axle assembly 10 is achieved, providing various power sources to the drive axle assembly 10 to simulate different vehicle operating states.

[0037] In one exemplary embodiment of this application, the power input device 1 further includes a first bearing housing 14, through which the first coupling 15 is fixed.

[0038] Furthermore, there are two load loading devices 2, which are respectively located on both sides of the drive axle assembly 10. The two load loading devices 2 can more effectively simulate the vehicle body load on both sides of the drive axle assembly 10 during vehicle operation, making the test results more accurate.

[0039] Furthermore, the load loading device 2 includes a loading motor 21, a second drive shaft 23, a second coupling 25, and a half-shaft 26. A second flange 22 is provided on the output shaft of the loading motor 21; the first end of the second drive shaft 23 is connected to the second flange 22; the first end of the second coupling 25 is connected to the second end of the second drive shaft 23; the first end of the half-shaft 26 is connected to the second end of the second coupling 25, and the second end of the half-shaft 26 is connected to the drive axle assembly 10. By configuring the loading motor 21, the second drive shaft 23, the second coupling 25, and the half-shaft 26, the load on the drive axle assembly 10 can be adjusted, thereby simulating different operating states of the vehicle.

[0040] In one exemplary embodiment of this application, the load loading device 2 further includes a second bearing seat 24, through which the second coupling 25 is fixed.

[0041] In conjunction with the aforementioned embodiments, the workbench 310 may also integrate multiple motor supports 27, which are used to support the loading motor 21.

[0042] According to another specific embodiment of this application, a test method for a drive axle oil temperature sensor is provided. The method uses the aforementioned test apparatus for the drive axle oil temperature sensor and includes:

[0043] S1, Assemble the drive axle assembly 10 with the test device, and turn on the power input device 1 and load loading device 2 to test run the drive axle assembly 10;

[0044] In step S2, the power input device 1 and the load loading device 2 are turned on to test run the drive axle assembly 10, which can complete the operation adjustment of each device and facilitate the smooth progress of subsequent tests.

[0045] S2. After the trial run is completed, a developer is evenly sprayed onto the mating surface of the drive axle oil temperature sensor and the drive axle housing, and the static setting time is preset.

[0046] Specifically, the settling time is 2 hours.

[0047] S3, lower the ambient temperature to the preset temperature, and place the test device and drive axle assembly 10 at the preset temperature for a first preset time.

[0048] Preferably, the preset temperature is -X0 degrees Celsius. By setting the preset temperature below zero degrees Celsius and placing the test device and drive axle assembly 10 at the preset temperature for a first preset time, it is possible to test whether the internal components (such as sealing rings) of drive axle assembly 10 are damaged, ensuring that the components of drive axle assembly 10 can operate normally in subsequent test steps.

[0049] S4, activate vibration device 31, based on the first preset vehicle speed, power input device 1 inputs the first preset speed to drive axle assembly 10, records the value of drive axle oil temperature sensor at this time as the first oil temperature, and controls drive axle assembly 10 to run for the second preset time.

[0050] Preferably, the first preset vehicle speed is 70 km / h.

[0051] S5, activate vibration device 31, based on second preset vehicle speed, power input device 1 inputs second preset speed to drive axle assembly 10, records the value of drive axle oil temperature sensor at this time as second oil temperature, and controls drive axle assembly 10 to run for third preset time.

[0052] Preferably, the second preset vehicle speed is 120 km / h.

[0053] S6, activate vibration device 31, based on the third preset vehicle speed, power input device 1 inputs the third preset speed to drive axle assembly 10, records the value of drive axle oil temperature sensor at this time as the third oil temperature, and controls drive axle assembly 10 to run for the fourth preset duration.

[0054] Preferably, the third preset speed is 140 km / h.

[0055] S7, activate vibration device 31, based on the maximum vehicle speed, power input device 1 inputs the fourth preset speed to drive axle assembly 10, records the value of drive axle oil temperature sensor at this time as the fourth oil temperature, and controls drive axle assembly 10 to run for the fifth preset duration.

[0056] The cycle is repeated a preset number of times, with steps S3 to S7 forming one loop.

[0057] When oil leakage occurs on the outer surface of the oil temperature sensor, stop the test and record the location of the oil leakage and the number of test cycles completed.

[0058] If no oil leakage occurs after the above steps and a preset number of cycles, the device is considered to have passed the test. It should be noted that in the above test, the vibration simulation device 3 can be adjusted to simulate various road vibration environments, the ambient temperature can be adjusted to other high or low temperature environments, and a mud and water spraying device can be added for further testing. This solution can effectively test the sealing effect of the oil temperature sensor, making the test results more accurate. The drive axle assembly 10 can be designed to better meet actual road driving needs during the design phase, reducing later design and manufacturing costs.

[0059] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0060] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A test apparatus for a drive axle oil temperature sensor, characterized in that, include: A power input device (1) is connected to the drive axle assembly (10) and is used to provide power to the drive axle assembly (10); A load loading device (2), wherein there is at least one load loading device (2), the load loading device (2) is connected to the drive axle assembly (10), and the load loading device (2) is used to apply a load to the drive axle assembly (10); Vibration simulation device (3), the vibration simulation device (3) is connected to the drive axle assembly (10), the vibration simulation device (3) is used to provide road vibration simulation for the drive axle assembly (10); When conducting tests using the aforementioned test device for the drive axle oil temperature sensor, the following steps are included: S1, Assemble the drive axle assembly (10) with the test device, and turn on the power input device (1) and the load loading device (2) to test run the drive axle assembly (10); S2. After the trial run is completed, a developer is evenly sprayed onto the mating surface of the drive axle oil temperature sensor and the drive axle housing, and the static setting time is preset. S3, lower the ambient temperature to a preset temperature, and place the test device and the drive axle assembly (10) at the preset temperature for a first preset time; S4, activate the vibration device (31), based on the first preset vehicle speed, the power input device (1) inputs the first preset speed to the drive axle assembly (10), records the value of the drive axle oil temperature sensor at this time as the first oil temperature, and controls the drive axle assembly (10) to run for the second preset time; S5, turn on the vibration device (31), based on the second preset vehicle speed, the power input device (1) inputs the second preset speed to the drive axle assembly (10), records the value of the drive axle oil temperature sensor at this time as the second oil temperature, and controls the drive axle assembly (10) to run for a third preset time; S6, turn on the vibration device (31), based on the third preset vehicle speed, the power input device (1) inputs the third preset speed to the drive axle assembly (10), records the value of the drive axle oil temperature sensor at this time as the third oil temperature, and controls the drive axle assembly (10) to run for the fourth preset time. S7, turn on the vibration device (31), based on the maximum vehicle speed, the power input device (1) inputs the fourth preset speed to the drive axle assembly (10), records the value of the drive axle oil temperature sensor at this time as the fourth oil temperature, and controls the drive axle assembly (10) to run for the fifth preset time; The cycle is repeated a preset number of times, with steps S3 to S7 forming one loop. When oil leakage occurs on the outer surface of the oil temperature sensor, stop the test and record the location of the oil leakage and the number of test cycles completed.

2. The test apparatus for the drive axle oil temperature sensor according to claim 1, characterized in that, The vibration simulation device (3) includes: Vibration device (31), the vibration device (31) is used to provide road vibration simulation for the drive axle assembly (10), and the input end of the vibration device (31) is provided with a connection device (32). The vibration device motor (33) has a motor flange (34) on its output shaft. The vibration device motor (33) is connected to the vibration device (31) through the motor flange (34) and the connecting device (32).

3. The test apparatus for the drive axle oil temperature sensor according to claim 2, characterized in that, The vibration device (31) includes: Workbench (310); A first cover plate (311) is disposed on the workbench (310); The second cover plate (312) is provided at a distance from the first cover plate (311) and the second cover plate (312) along the height direction of the worktable (310), and the drive axle assembly (10) is provided on the surface of the second cover plate (312) away from the worktable (310). A cam structure having a camshaft (313) connected to the connecting device (32), the cam structure being disposed between the first cover plate (311) and the second cover plate (312), the cam structure rotating to drive the second cover plate (312) to move along the height direction of the workbench (310) to provide road vibration simulation for the drive axle assembly (10); A support spring (314) is provided, the first end of which is connected to the first cover plate (311), and the second end of which is connected to the second cover plate (312). There is at least one support spring (314).

4. The test apparatus for the drive axle oil temperature sensor according to claim 3, characterized in that, There are two support springs (314), which are respectively located near the two ends of the first cover plate (311), and the cam structure is located between the two support springs (314).

5. The test apparatus for the drive axle oil temperature sensor according to claim 3, characterized in that, There are two cam structures, which are symmetrically arranged about the geometric center line in the height direction of the second cover plate (312).

6. The test apparatus for the drive axle oil temperature sensor according to claim 3, characterized in that, The vibration device (31) also includes: A limiting post (315) is disposed between the first cover plate (311) and the second cover plate (312).

7. The test apparatus for the drive axle oil temperature sensor according to claim 1, characterized in that, The power input device (1) includes: An input motor (11) is provided with a first flange (12) on its output shaft. A first drive shaft (13) is connected at its first end to the first flange (12); A first coupling (15) is connected at its first end to the second end of the first drive shaft (13). An input drive shaft (16) is provided, the first end of which is connected to the second end of the first coupling (15), and the second end of which is connected to the drive axle assembly (10).

8. The test apparatus for the drive axle oil temperature sensor according to claim 1, characterized in that, There are two load loading devices (2), which are respectively located on both sides of the drive axle assembly (10).

9. The test apparatus for the drive axle oil temperature sensor according to claim 1, characterized in that, The load loading device (2) includes: Loading motor (21), the output shaft of which is provided with a second flange (22); The second drive shaft (23) has its first end connected to the second flange (22); The second coupling (25) has its first end connected to the second end of the second drive shaft (23); Half shaft (26), the first end of which is connected to the second end of the second coupling (25), and the second end of which is connected to the drive axle assembly (10).

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