Transmission shaft bench test device and test method

Abstract

The invention relates to a transmission shaft bench test device and method, and the device comprises a bumping sliding mechanism which comprises a pedestal, the pedestal is in sliding connection with a sliding platform through a sliding rail, and the pedestal is provided with a first actuator which drives the sliding platform to do reciprocating lifting motion in the length direction of the sliding rail; the side-tipping rotating mechanism comprises a side-tipping platform rotationally connected with the sliding platform through a rotating shaft, and a second actuator for driving the side-tipping platform to rotate around the rotating shaft is connected between the sliding platform and the side-tipping platform; the steering driving mechanism comprises a gearbox fixed on the roll platform, an input shaft of the gearbox is connected with a driving motor through a coupler, an output shaft of the gearbox is connected with a transmission shaft to be tested, and the transmission shaft to be tested is connected with a dynamometer. Performance and endurance tests of the transmission shaft under multiple working conditions can be simulated and detected more truly, and objectivity and accuracy of detection of the detected transmission shaft are improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle drive shaft testing, and in particular to a drive shaft bench test device and test method. Background Art

[0002] Drive shafts are primarily used for powertrain output in off-road vehicles and passenger cars. One end of a passenger car's drive shaft connects to the transmission and the other to the wheel hub flange. As the vehicle pitches, tilts, and turns while driving, the universal joints at both ends of the drive shaft operate at different angles, resulting in different speeds and torques.

[0003] One end of the off-road vehicle's drive shaft is connected to the main reducer, and the other end is connected to the wheel-side reducer. Since the drive shaft itself is installed at an angle, as the vehicle bumps up and down, tilts left and right, and turns during driving, the angle and speed torque of the universal joints at both ends of the drive shaft are also different.

[0004] The difficulty of the existing technology lies first in that it can only simulate the vehicle's up and down bumping conditions, but cannot simulate the vehicle's left and right tilt and steering conditions, nor does it provide high and low temperature environments and mud and dust environments for the drive shaft.

[0005] During the test, two drive shafts were tested simultaneously. The test bench could only push in one direction to simulate the up and down bumping conditions, resulting in the same angle for the two universal joints of the drive shafts, making it impossible to truly simulate the various working conditions of the drive shafts on the entire vehicle.

[0006] Furthermore, drive shafts can only be tested at room temperature, failing to simulate usage in diverse environments. Currently, no domestic testing agency has the testing equipment to simultaneously simulate vehicle pitch, roll, and steering, as well as high and low temperatures, mud, and dust environments. Testing resources are scarce, and corresponding industry standards are lacking. Summary of the Invention

[0007] The embodiments of the present application provide a drive shaft bench test device and test method to solve the problem in the related art that the test bench can only push in one direction to simulate the up and down bumping condition, resulting in the same angle of the two universal joints of the drive shaft and the inability to truly simulate the various working conditions of the drive shaft on the entire vehicle.

[0008] A first aspect of an embodiment of the present application provides a transmission shaft bench test device, comprising:

[0009] A bump sliding mechanism, the bump sliding mechanism comprising a base, a sliding platform being slidably connected to the base via a slide rail, and a first actuator being provided on the base for driving the sliding platform to move back and forth along the length direction of the slide rail;

[0010] A tilt rotation mechanism, the tilt rotation mechanism comprising a tilt platform rotatably connected to the sliding platform via a rotating shaft, a second actuator connected between the sliding platform and the tilt platform for driving the tilt platform to rotate around the rotating shaft;

[0011] The steering drive mechanism includes a gearbox fixed on the roll platform, the input shaft of the gearbox is connected to the drive motor through a coupling, the output shaft of the gearbox is connected to the measured transmission shaft, and the measured transmission shaft is connected to a dynamometer.

[0012] In some embodiments, the base and the sliding platform are parallel to each other and spaced apart, and the slide rail slidably connected between the base and the sliding platform includes a first slide rail and a second slide rail that are parallel to each other and spaced apart;

[0013] A stroke measuring device for measuring the lifting and lowering displacement of the sliding platform relative to the base is also connected between the base and the sliding platform. One end of the stroke measuring device and the first actuator is hinged on the base, and the other end of the stroke measuring device and the first actuator is hinged on the sliding platform.

[0014] In some embodiments, the tilting platform and the sliding platform are parallel to each other and spaced apart, the tilting platform is provided with an arc-shaped guide groove with the rotating shaft as a circle, and the sliding platform is fixedly connected with a first guide rod and a second guide rod located in the arc-shaped guide groove;

[0015] An angle sensor for detecting the rotation angle of the roll platform around the rotation axis is connected to the rotation axis. The second actuator is located on a side away from the rotation axis. One end of the second actuator is hinged to the sliding platform, and the other end of the second actuator is hinged to the roll platform.

[0016] In some embodiments, a differential is provided in the gearbox, the differential is adapted to be equipped with a differential lock, the tested drive shaft includes a first tested drive shaft connected to one end of the differential, and a second tested drive shaft connected to the other end of the differential, one end of the first tested drive shaft is connected to the differential via a first torque and speed sensor, and one end of the second tested drive shaft is connected to the differential via a second torque and speed sensor;

[0017] The dynamometer includes a first dynamometer and a second dynamometer, wherein the first dynamometer is connected to the other end of the first tested transmission shaft, and the second dynamometer is connected to the other end of the second tested transmission shaft.

[0018] In some embodiments: the output shafts on both sides of the gearbox are provided with flanges connected to the measured transmission shaft, and the flanges are provided with an external spline shaft and an internal spline sleeve with adjustable length, the internal spline sleeve is connected to the flange, and the external spline shaft is connected to the output shaft of the gearbox.

[0019] In some embodiments: it also includes placing the tested transmission shaft in a high and low temperature environment chamber in a set temperature environment, the high and low temperature environment chamber is provided with a cavity for accommodating the tested transmission shaft, the tested transmission shaft is located in the high and low temperature environment chamber, and the high and low temperature environment chamber is adapted to be equipped with a cold source and a heat source for adjusting the ambient temperature in the high and low temperature environment chamber.

[0020] In some embodiments, a mud generator is connected to the outside of the high and low temperature environment chamber and is in communication with the cavity of the high and low temperature environment chamber. The mud generator is used to spray mud into the high and low temperature environment chamber.

[0021] In some embodiments: it also includes a test bench control system, the first actuator, the second actuator, the drive motor, and the dynamometer are all connected to the test bench control system, and the test bench control system is used to control the torque of the dynamometer, control the speed of the drive motor, and control the stroke of the first actuator and the second actuator.

[0022] In some embodiments, the apparatus further includes a test bench system for measuring torque data of the dynamometer, measuring the stroke of the first actuator, measuring the rotation angle of the roll platform, and recording the number of tests of the tested transmission shaft.

[0023] A second aspect of the embodiments of the present application provides a test method for a transmission shaft bench test device, the method using the transmission shaft bench test device described in any of the above embodiments, the method comprising:

[0024] Install the drive shaft to be tested between the output shaft on both sides of the gearbox and the dynamometer;

[0025] Adjust the position of the dynamometer left and right to make the drive shaft to be tested at an appropriate length;

[0026] Adjust the lowest and highest position limits of the reciprocating lifting motion of the sliding platform;

[0027] Adjust the minimum and maximum roll angle limits of the roll platform around the rotation axis;

[0028] Start the test device, and the test bench control system controls the drive motor to provide the required speed and the dynamometer to provide the required torque;

[0029] Control the first actuator to drive the sliding platform to move up and down reciprocatingly, and control the second actuator to drive the tilting platform to move back and forth around the rotating axis;

[0030] The test bench system collects the torque and speed data of the dynamometer, the displacement data of the sliding platform, the angle data of the roll platform, and records the test times of the tested drive shaft.

[0031] The beneficial effects of the technical solution provided by this application include:

[0032] An embodiment of the present application provides a transmission shaft bench test device and a test method. A transmission shaft bench test device of the present application is provided with a bump sliding mechanism, the bump sliding mechanism includes a base, a sliding platform is slidably connected to the base through a slide rail, and the base is provided with a first actuator that drives the sliding platform to move back and forth and up and down along the length direction of the slide rail; a roll rotation mechanism, the roll rotation mechanism includes a roll platform rotatably connected to the sliding platform through a rotating shaft, and a second actuator that drives the roll platform to rotate around the rotating shaft is connected between the sliding platform and the roll platform; a steering drive mechanism, the steering drive mechanism includes a gearbox fixed on the roll platform, the input shaft of the gearbox is connected to the drive motor through a coupling, the output shaft of the gearbox is connected to the transmission shaft to be tested, and the transmission shaft to be tested is connected to the dynamometer.

[0033] Therefore, a drive shaft bench test device of the present application integrates a bump sliding mechanism, a roll rotation mechanism and a steering drive mechanism, which are used to simulate the vertical, roll and steering combined motions of the test drive shaft under test in the vehicle under bumpy road conditions, vehicle roll conditions, and when the vehicle is in a steering condition. The bump sliding mechanism, the roll rotation mechanism and the steering drive mechanism constitute a test device to carry out rotational performance tests and rotational fatigue tests of the test drive shaft in actual operation, and to assess the speed and torque performance, spline wear and universal joint wear performance of the test drive shaft. The present application can more realistically simulate the performance and durability tests of the test drive shaft under multiple working conditions, thereby improving the objectivity and accuracy of the test of the test drive shaft.

[0034] The bump-sliding mechanism uses a first actuator to drive a sliding platform to move back and forth along the length of the rails, causing the drive shaft under test to extend and contract, shifting its angle and simulating the vertical motion of a vehicle pitching up and down. The roll-rotation mechanism uses a second actuator to drive a roll platform to rotate around its axis on the sliding platform. This rotation creates different universal joint angles at both ends of the drive shaft under test, simulating a vehicle's left or right roll. The steering drive mechanism uses a motor to drive the gearbox on the roll platform. The gearbox's output shaft drives the drive shaft under test. The dynamometer connected to the drive shaft controls its speed and torque. The gearbox's differential function allows the drive shaft under test to operate at different speeds, simulating a vehicle turning left or right. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 This is a schematic structural diagram of an embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the structure of the bump sliding mechanism of an embodiment of the present application;

[0038] Figure 3 This is a schematic structural diagram of the roll rotation mechanism according to an embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of the steering drive mechanism structure of an embodiment of the present application.

[0040] Reference numerals:

[0041] 1. First dynamometer; 2. First drive shaft to be tested; 3. First torque and speed sensor; 4. Base; 5. First slide rail; 6. First actuator; 7. Stroke measuring device; 8. Second slide rail; 9. Second actuator; 10. Sliding platform; 11. Roll platform; 12. First guide rod; 13. Second guide rod; 14. Gearbox; 15. Coupling; 16. Drive motor; 17. Rotating shaft; 18. Angle sensor; 19. Second torque and speed sensor; 20. Second drive shaft to be tested; 21. Second dynamometer; 22. High and low temperature environment chamber; 23. Mud generator; 24. Bump and slide mechanism; 25. Roll and rotation mechanism; 26. Steering drive mechanism; 27. Test bench control system; 28. Test bench measurement system. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] The embodiments of the present application provide a drive shaft bench test device and test method, which can solve the problem in the related art that the test bench can only push in one direction to simulate the up and down bumping conditions, resulting in the two universal joints of the drive shaft having the same angle, and cannot truly simulate the various working conditions of the drive shaft on the whole vehicle.

[0044] See body 1 to Figure 4 As shown, the first aspect of the embodiment of the present application provides a transmission shaft bench test device, comprising:

[0045] The bump sliding mechanism 24 includes a base 4, on which a sliding platform 10 is slidably connected via a slide rail. The sliding platform 10 moves up and down relative to the base 4 via the slide rail. A first actuator 6 is provided on the base 4 for driving the sliding platform 10 to move up and down along the length direction of the slide rail. The first actuator 6 is preferably but not limited to a pneumatic cylinder or a hydraulic cylinder.

[0046] The roll rotation mechanism 25 includes a roll platform 11 rotatably connected to the sliding platform 10 via a rotating shaft 17. The rotating shaft 17 is perpendicularly connected to the sliding platform 10, allowing the roll platform 11 to freely rotate relative to the sliding platform 10 about the rotating shaft 17. A second actuator 9 is connected between the sliding platform 10 and the roll platform 11 to drive the roll platform 11 to rotate about the rotating shaft 17. The second actuator 9 is preferably, but not limited to, a pneumatic cylinder or a hydraulic cylinder.

[0047] The steering drive mechanism 26 includes a gearbox 14 fixed to the roll platform 11. The input shaft of the gearbox 14 is connected to a drive motor 16 via a coupling 15. The output shafts on both sides of the gearbox 14 are connected to the drive shaft under test, which is then connected to a dynamometer. The dynamometer acts as a load on the drive shaft under test and can control the drive shaft under test to run at different speeds, simulating a vehicle turning left or right.

[0048] A drive shaft bench test device in an embodiment of the present application integrates a bump sliding mechanism 24, a roll rotation mechanism 25 and a steering drive mechanism 26, which is used to simulate the vertical, roll and steering combined movement of the test drive shaft in the vehicle under bumpy road conditions, vehicle roll conditions, and when the vehicle is in a steering condition.

[0049] The test apparatus, comprised of a roll-sliding mechanism 24, a roll-rotation mechanism 25, and a steering drive mechanism 26, conducts actual operating rotational performance and fatigue tests on the drive shaft under test, assessing the shaft's speed and torque performance, spline wear, and universal joint wear. This application allows for more realistic simulation of the drive shaft's performance and durability under multiple operating conditions, improving the objectivity and accuracy of the test.

[0050] The bump sliding mechanism 24, via the first actuator 6, drives the sliding platform 10 to move back and forth along the length of the slide rail, causing the drive shaft under test to extend and contract, causing the angle to change, simulating the vertical movement of a vehicle pitching up and down. The roll rotation mechanism 25, via the second actuator 9, drives the roll platform 11 to rotate around the rotation axis 17 on the sliding platform 10. The roll platform 11 can rotate around the rotation axis 17, resulting in different universal joint angles at both ends of the drive shaft under test, simulating the left and right roll of the vehicle.

[0051] The steering drive mechanism 26 drives the gearbox 14 on the roll platform 11 to rotate through the drive motor 16. The output shaft of the gearbox 14 drives the transmission under test to rotate. The dynamometer connected to the transmission shaft under test controls the speed and torque of the transmission shaft under test. The gearbox 14 has a differential function, and the transmission shaft under test runs at different speeds, simulating the vehicle turning left or right.

[0052] In some alternative embodiments: See Figure 1 and Figure 2 As shown, an embodiment of the present application provides a transmission shaft bench test device, wherein the base 4 and the sliding platform 10 of the transmission shaft bench test device are parallel to each other and spaced apart. The slide rails slidably connected between the base 4 and the sliding platform 10 include a first slide rail 5 and a second slide rail 8 that are parallel to each other and spaced apart. The first slide rail 5 and the second slide rail 8 are both fixed to the base 4, and the sliders on the first slide rail 5 and the second slide rail 8 are fixedly connected to the sliding platform 10.

[0053] A travel measuring device 7 is connected between the base 4 and the sliding platform 10 to measure the vertical displacement of the sliding platform 10 relative to the base 4. One end of the travel measuring device 7 and the first actuator 6 are hinged to the base 4, while the other ends of the travel measuring device 7 and the first actuator 6 are hinged to the sliding platform 10. As the sliding platform 10 moves along the first and second rails 5 and 8, the measured drive shaft expands and contracts, changing its angle, simulating the vertical motion of a vehicle pitching up and down.

[0054] In some alternative embodiments: See Figure 1 and Figure 3 As shown, an embodiment of the present application provides a drive shaft test bench apparatus, wherein the roll platform 11 and the sliding platform 10 of the drive shaft test bench apparatus are arranged parallel to each other and spaced apart. A circular arc-shaped guide groove with a rotating shaft 17 as a circle is formed on the roll platform 11. A first guide rod 12 and a second guide rod 13 located within the circular arc-shaped guide groove are fixedly connected to the sliding platform 10. The first guide rod 12 and the second guide rod 13 are both perpendicularly connected to the sliding platform 10 and are used to limit the rotation angle range of the roll platform 11 on the roll platform 11.

[0055] An angle sensor 18 is connected to the rotating shaft 17, detecting the rotation angle of the roll platform 11 about the rotating shaft 17. The second actuator 9 is located on the side away from the rotating shaft 17. One end of the second actuator 9 is hinged to the sliding platform 10, and the other end is hinged to the roll platform 11. The roll platform 11 is mounted on the sliding platform 10 via a first guide rod 12, a second guide rod 13, and the rotating shaft 17. The second actuator 9 drives the roll platform 11 to rotate about the rotating shaft 17, resulting in different universal joint angles at both ends of the measured drive shaft, simulating the vehicle's left-right roll.

[0056] In some alternative embodiments: See Figure 1 and Figure 3 As shown, an embodiment of the present application provides a drive shaft bench test apparatus. A differential is provided within a gearbox 14 of the drive shaft bench test apparatus. The differential is adapted to have a differential lock. The test drive shafts include a first test drive shaft 2 connected to one end of the differential and a second test drive shaft 20 connected to the other end of the differential. One end of the first test drive shaft 2 is connected to the differential via a first torque and speed sensor 3, and one end of the second test drive shaft 20 is connected to the differential via a second torque and speed sensor 19.

[0057] The dynamometer includes a first dynamometer 1 and a second dynamometer 21. The first dynamometer 1 is connected to the other end of the first tested propeller shaft 2, and the second dynamometer 21 is connected to the other end of the second tested propeller shaft 20. The left side of the first tested propeller shaft 2 is connected to the first dynamometer 1, and the right side is connected to the differential via a first torque and speed sensor 3. The right side of the second tested propeller shaft 20 is connected to the second dynamometer 21, and the left side is connected to the differential via a second torque and speed sensor 19.

[0058] The first dynamometer 1 and the second dynamometer 21 in the steering drive mechanism 26 operate at different speeds, and the gearbox 14 has a differential function, so that the first tested drive shaft 2 and the second tested drive shaft 20 operate at different speeds, simulating the vehicle turning left or right. When the differential lock is opened, the first tested drive shaft 2 and the second tested drive shaft 20 operate at the same speed. During the test, it is also possible to install only the first tested drive shaft 2 or the second tested drive shaft 20 to conduct a single drive shaft test. During the test, the motor 16 can be used to drive (provide speed) and the first dynamometer 1 and the second dynamometer 2 can be loaded (provide load), or the motor 16 can be used to load (provide load) and the first dynamometer 1 and the second dynamometer 21 can be driven (provide speed).

[0059] In some alternative embodiments: See Figure 1 and Figure 3As shown, the present embodiment provides a drive shaft bench test apparatus. Each output shaft on either side of the transmission 14 is equipped with a flange for connection to the drive shaft under test. The flanges are provided with a telescopically adjustable external spline shaft and an internal spline sleeve. The internal spline sleeve is connected to the flanges, and the external spline shaft is connected to the output shaft of the transmission 14.

[0060] The external spline shaft and internal spline sleeve are coaxially connected in a telescopic manner, simulating the transmission sizes of different vehicle types and matching different vehicle models to conduct rotational tests on different types of test drive shafts. The transmission 14 has an internal differential, allowing the first and second test drive shafts 2, 20 to operate at different speeds and torques, simulating the differential state between the first and second test drive shafts 2, 20 when the vehicle turns.

[0061] First dynamometer 1 and second dynamometer 21 provide rotational speeds to first and second tested drive shafts 2, 20, respectively. Drive motor 16 provides torque to first and second tested drive shafts 2, 20, simulating vehicle operation. Drive motor 16 also provides varying steady-state and dynamic torques to first and second tested drive shafts 2, 20, simulating the dynamic operating conditions of the drive shafts during vehicle operation.

[0062] The first dynamometer 1 and the second dynamometer 21 can be controlled independently, and the differential inside the gearbox 14 can be locked by a differential lock. The bench test device can perform single-piece tests on the first tested drive shaft 2 or the second tested drive shaft 20, and can also test the first tested drive shaft 2 and the second tested drive shaft 20 at the same time.

[0063] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides a drive shaft bench test device, which also includes a high and low temperature environment chamber 22 for placing the drive shaft to be tested in a set temperature environment. The high and low temperature environment chamber 22 is provided with a cavity for accommodating the drive shaft to be tested. The drive shaft to be tested is located in the high and low temperature environment chamber, and the high and low temperature environment chamber is adapted to be equipped with a cold source and a heat source for adjusting the ambient temperature in the high and low temperature environment chamber.

[0064] A mud generator 23 is connected to the outside of the high and low temperature environment chamber 22 and is in communication with the cavity of the high and low temperature environment chamber 22. The mud generator 23 is used to spray mud into the high and low temperature environment chamber 22. The high and low temperature environment chamber 22 and the mud generator 23 can provide a high and low temperature environment and a mud and dust environment for the first and second tested drive shafts 2 and 20, simulating the operating conditions of outdoor scenes in high and low temperature environments and mud and dust environments.

[0065] In some alternative embodiments: See Figure 1As shown, an embodiment of the present application provides a transmission shaft bench test device, which also includes a bench control system 27. The first actuator 6, the second actuator 9, the drive motor 16, and the dynamometer are all connected to the bench control system 27. The bench control system 27 is used to control the torque of the dynamometer, control the speed of the drive motor 16, and control the stroke of the first actuator 6 and the second actuator 9.

[0066] The system also includes a test bench measurement system 28, which is used to measure torque data from the dynamometer, the stroke of the first actuator 6, the rotation angle of the roll platform 11, and record the number of test runs on the drive shaft under test. The stroke measurement device 7, angle sensor 18, first torque and speed sensor 3, and second torque and speed sensor 19 are all connected to the test bench measurement system 28 and are used to obtain torque data from the first dynamometer 1 and second dynamometer 21, respectively, measure the stroke of the first actuator 6, measure the rotation angle of the roll platform 11, and record the number of test runs on the drive shaft under test.

[0067] See also Figures 1 to 4 As shown, a second aspect of the embodiment of the present application provides a test method for a transmission shaft bench test device, the method using the transmission shaft bench test device described in any of the above embodiments, the method comprising:

[0068] Step 101 : Install the first tested transmission shaft 2 and the second tested transmission shaft 20 between the output shafts on both sides of the gearbox 14 and the first dynamometer 1 and the second dynamometer 21 .

[0069] Step 102 , adjust the positions of the first dynamometer 1 and the second dynamometer 21 left and right, and adjust the flange positions on both sides of the gearbox 14 so that the first tested transmission shaft 2 and the second tested transmission shaft 20 are at appropriate lengths.

[0070] Step 103: Adjust the lowest and highest position limits of the reciprocating lifting motion of the sliding platform 10.

[0071] Step 104 : Adjust the minimum and maximum roll angle limits of the roll platform 11 rotating around the rotation axis 17 .

[0072] Step 105 : Start the test device. The test bench control system 27 controls the drive motor 16 to provide the required rotational speed, and controls the first dynamometer 1 and the second dynamometer 21 to provide the required torque.

[0073] Step 106 , control the first actuator 6 to drive the sliding platform 10 to move up and down, and control the second actuator 9 to drive the tilting platform 11 to move back and forth around the rotating shaft 17 .

[0074] Step 107 : Control the high and low temperature environment chamber 22 and the mud generator 23 to provide the first tested transmission shaft 2 and the second tested transmission shaft 20 with a high and low temperature environment and a mud and dust environment.

[0075] Step 108 , the test bench system 28 collects torque and speed data of the first dynamometer 1 and the second dynamometer 21 , collects displacement data of the sliding platform 10 , collects angle data of the roll platform 11 , and records the number of tests of the first tested transmission shaft 2 and the second tested transmission shaft 20 .

[0076] How it works

[0077] An embodiment of the present application provides a transmission shaft bench test device and a test method. A transmission shaft bench test device of the present application is provided with a bump sliding mechanism 24, which includes a base 4, a sliding platform 10 is slidably connected to the base 4 through a slide rail, and a first actuator 6 is provided on the base 4 for driving the sliding platform 10 to move back and forth along the length direction of the slide rail; a roll rotation mechanism 25, which includes a roll platform 11 rotatably connected to the sliding platform 10 through a rotating shaft 17, and a second actuator 9 is connected between the sliding platform 10 and the roll platform 11 for driving the roll platform 11 to rotate around the rotating shaft 17; a steering drive mechanism 26, which includes a gearbox 14 fixed on the roll platform 11, and the input shaft of the gearbox 14 is connected to the drive motor 16 through a coupling 15, and the output shafts on both sides of the gearbox 14 are connected to the transmission shaft to be tested, and the transmission shaft to be tested is connected to a dynamometer.

[0078] Therefore, a transmission shaft bench test device of the present application integrates a bump sliding mechanism 24, a roll rotation mechanism 25 and a steering drive mechanism 26, which are used to simulate the vertical, roll and steering combined movements of the transmission shaft under test in the vehicle under bumpy road conditions, vehicle roll conditions, and when the vehicle is in a steering condition. The bump sliding mechanism 24, the roll rotation mechanism 25 and the steering drive mechanism 26 form a test device to carry out rotational performance tests and rotational fatigue tests of the transmission shaft under test in actual operation, and to assess the speed and torque performance, spline wear and universal joint wear performance of the transmission shaft under test. The present application can more realistically simulate the performance and durability tests of the transmission shaft under multiple working conditions, thereby improving the objectivity and accuracy of the detection of the transmission shaft under test.

[0079] The bump sliding mechanism 24 drives the sliding platform 10 via the first actuator 6 to move back and forth along the length of the slide rail, causing the tested drive shaft to extend and contract, changing its angle, simulating the vertical movement of a vehicle pitching up and down. The roll rotation mechanism 25 drives the roll platform 11 via the second actuator 9 to rotate around the rotation axis 17 on the sliding platform 10. The roll platform 11 can rotate around the rotation axis 17, resulting in different universal joint angles at both ends of the tested drive shaft, simulating the vehicle's left or right roll. The steering drive mechanism 26 drives the gearbox 14 on the roll platform 11 via the drive motor 16. The output shaft of the gearbox 14 drives the tested drive shaft to rotate. The dynamometer connected to the tested drive shaft controls the speed and torque of the tested drive shaft. The gearbox 14 has a differential function, allowing the tested drive shaft to operate at different speeds, simulating a vehicle turning left or right.

[0080] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0081] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0082] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A transmission shaft bench test device, characterized in that: include: A bumping sliding mechanism (24), the bumping sliding mechanism (24) comprising a base (4), a sliding platform (10) being slidably connected to the base (4) via a slide rail, and a first actuator (6) being provided on the base (4) for driving the sliding platform (10) to move up and down along the length direction of the slide rail; A tilt rotation mechanism (25), the tilt rotation mechanism (25) comprising a tilt platform (11) rotatably connected to the sliding platform (10) via a rotating shaft (17), a second actuator (9) being connected between the sliding platform (10) and the tilt platform (11) for driving the tilt platform (11) to rotate about the rotating shaft (17); A steering drive mechanism (26) includes a gearbox (14) fixed on the roll platform (11), an input shaft of the gearbox (14) connected to a drive motor (16) via a coupling (15), an output shaft of the gearbox (14) connected to a drive shaft to be measured, and the drive shaft to be measured connected to a dynamometer.

2. The transmission shaft bench test device according to claim 1, characterized in that: The base (4) and the sliding platform (10) are parallel to each other and spaced apart, and the slide rails slidably connected between the base (4) and the sliding platform (10) include a first slide rail (5) and a second slide rail (8) that are parallel to each other and spaced apart. A stroke measuring device (7) for measuring the lifting displacement of the sliding platform (10) relative to the base (4) is also connected between the base (4) and the sliding platform (10). One end of the stroke measuring device (7) and the first actuator (6) are hinged on the base (4), and the other end of the stroke measuring device (7) and the first actuator (6) are hinged on the sliding platform (10).

3. The transmission shaft bench test device according to claim 1, characterized in that: The tilting platform (11) and the sliding platform (10) are parallel to each other and spaced apart. The tilting platform (11) is provided with an arc-shaped guide groove with the rotating shaft (17) as a circle. The sliding platform (10) is fixedly connected with a first guide rod (12) and a second guide rod (13) located in the arc-shaped guide groove. An angle sensor (18) for detecting the rotation angle of the roll platform (11) around the rotation shaft (17) is connected to the rotation shaft (17); the second actuator (9) is located on a side away from the rotation shaft (17); one end of the second actuator (9) is hinged to the sliding platform (10); and the other end of the second actuator (9) is hinged to the roll platform (11).

4. The transmission shaft bench test device according to claim 1, characterized in that: A differential is provided in the gearbox (14), and the differential is adapted to be equipped with a differential lock. The tested drive shaft comprises a first tested drive shaft (2) connected to one end of the differential, and a second tested drive shaft (20) connected to the other end of the differential. One end of the first tested drive shaft (2) is connected to the differential via a first torque and speed sensor (3), and one end of the second tested drive shaft (20) is connected to the differential via a second torque and speed sensor (19). The dynamometer comprises a first dynamometer (1) and a second dynamometer (21), wherein the first dynamometer (1) is connected to the other end of the first measured transmission shaft (2), and the second dynamometer (21) is connected to the other end of the second measured transmission shaft (20).

5. A transmission shaft bench test device according to claim 1 or 4, characterized in that: The output shafts on both sides of the gearbox (14) are provided with flanges connected to the transmission shaft to be tested, the flanges are provided with an external spline shaft and an internal spline sleeve with adjustable length, the internal spline sleeve is connected to the flanges, and the external spline shaft is connected to the output shaft of the gearbox.

6. A transmission shaft bench test device according to claim 1 or 4, characterized in that: The invention also includes a high and low temperature environment chamber (22) for placing the transmission shaft under test in a set temperature environment, wherein a cavity for accommodating the transmission shaft under test is provided in the high and low temperature environment chamber (22), and the transmission shaft under test is located in the high and low temperature environment chamber (22), and the high and low temperature environment chamber (22) is adapted to be equipped with a cold source and a heat source for adjusting the ambient temperature in the high and low temperature environment chamber (22).

7. The transmission shaft bench test device according to claim 6, characterized in that: The high and low temperature environment chamber (22) is externally connected to a mud generator (23) in communication with the cavity of the high and low temperature environment chamber (22), and the mud generator (23) is used to spray mud into the high and low temperature environment chamber (22).

8. The transmission shaft bench test device according to claim 1, characterized in that: The invention also includes a bench control system (27), wherein the first actuator (6), the second actuator (9), the drive motor (16), and the dynamometer are all connected to the bench control system (27), and the bench control system (27) is used to control the torque of the dynamometer, the speed of the drive motor (16), and the stroke of the first actuator (6) and the second actuator (9).

9. The transmission shaft bench test device according to claim 1, characterized in that: It also includes a bench measurement system (28), which is used to measure the torque data of the dynamometer, measure the stroke of the first actuator (6), measure the rotation angle of the roll platform (11), and record the test times of the tested transmission shaft.

10. A test method for a transmission shaft bench test device, characterized in that: The method uses the transmission shaft bench test device according to any one of claims 1 to 9, and the method comprises: The transmission shaft to be tested is installed between the output shafts on both sides of the gearbox (14) and the dynamometer; Adjust the position of the dynamometer left and right to make the drive shaft to be tested at an appropriate length; Adjusting the lowest and highest position limits of the reciprocating lifting motion of the sliding platform (10); Adjusting the minimum and maximum tilt angle limits of the tilt platform (11) rotating around the rotation axis; The test device is started, and the test bench control system (27) controls the drive motor (16) to provide the required speed and controls the dynamometer to provide the required torque; Controlling the mud generator (23) and the high and low temperature environment chamber (22) to provide a test environment for the tested transmission shaft; Controlling the first actuator (6) to drive the sliding platform (10) to move up and down reciprocatingly, and controlling the second actuator (9) to drive the tilting platform (11) to move around the rotating shaft (17) to move back and forth in rotation; The bench measurement system (28) collects torque and speed data of the dynamometer, collects displacement data of the sliding platform (10), collects angle data of the roll platform (11), and records the number of tests of the tested transmission shaft.

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