Torsional fatigue test device for transmission shaft

Abstract

The invention provides a transmission shaft torsional fatigue test device, and relates to the technical field of transmission shaft tests. The motor heightening tool is arranged on the test platform; the driving motor is arranged on the motor heightening tool; the speed reducer heightening tool is arranged on the test platform; the driving speed reducer is arranged on the speed reducer heightening tool and is in transmission connection with the driving motor; the load motor is arranged on the test platform; the load speed reducer is arranged on the test platform and is in transmission connection with the load motor; the transmission shaft to be tested is provided with a first end and a second end, the first end is connected with the driving speed reducer, the second end is connected with the load speed reducer, and the first end is higher than the second end. According to the technical scheme, the motor heightening tool and the speed reducer heightening tool are additionally arranged, so that the first end is higher than the second end, the actual use working condition of the to-be-tested transmission shaft on the mine car is simulated, the reliability and the service life of the to-be-tested transmission shaft are verified, and the accuracy of a test result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transmission shaft testing, and in particular to a transmission shaft torsional fatigue testing device. Background Art

[0002] In the complex operating environment of the mining area, the mine car faces many challenges. Due to the harsh working conditions in the mining area, such as heavy load uphill (slope ranges from 5% to 30%), muddy and slippery roads, and escape from difficulties, the performance requirements of the drive shaft on the mine car are extremely demanding. The drive shaft not only needs to work stably under the condition of transmitting large torque and torque alternation, but also needs to have the characteristics of high reliability and long life to adapt to various harsh working conditions of the mine car.

[0003] The drive shaft on the mine car cannot be arranged horizontally due to the layout of the power line. There is an installation angle between the drive shaft and the gearbox and drive axle on the power line. Due to the installation angle, the universal joint of the drive shaft usually drives at an uneven speed, which further increases the reliability requirements of the drive shaft.

[0004] How to design a transmission shaft torsional fatigue test device that takes the installation angle into consideration so as to perform a torsional fatigue test on the transmission shaft before it is installed inside a mine car is a problem that needs to be solved urgently. Summary of the invention

[0005] In order to solve or improve at least one of the above technical problems, an object of the present invention is to provide a transmission shaft torsional fatigue testing device.

[0006] To achieve the above objectives, the present invention provides a transmission shaft torsional fatigue testing device, including a test platform, a motor heightening tooling, a drive motor, a reducer heightening tooling, a drive reducer, a load motor, a load reducer and a transmission shaft to be tested.

[0007] The motor heightening fixture is arranged on the test platform. The driving motor is arranged on the motor heightening fixture. The speed reducer heightening fixture is arranged on the test platform. The driving speed reducer is arranged on the speed reducer heightening fixture, and the driving speed reducer is connected to the driving motor by transmission. The load motor is arranged on the test platform. The load speed reducer is arranged on the test platform, and the load speed reducer is connected to the load motor by transmission.

[0008] The transmission shaft to be tested has a first end and a second end which are arranged opposite to each other. The first end is used to be connected to a driving reducer, and the second end is used to be connected to a load reducer. The height of the first end is greater than the height of the second end.

[0009] The driving motor transmits torque to the load motor through the driving reducer, the transmission shaft to be tested and the load reducer.

[0010] The present invention aims to provide a transmission shaft torsional fatigue test device. By adding a motor heightening tool and a reducer heightening tool, the first end of the transmission shaft to be tested can be made higher than the second end, thereby simulating the actual use condition of the transmission shaft to be tested on a mine car, and verifying the reliability and life of the transmission shaft to be tested, which is conducive to improving the accuracy of the test results. After the transmission shaft that has been tested and verified is mounted on a mine car, the possibility of after-sales failure can be effectively reduced. In addition, the transmission shaft torsional fatigue test device provided by the present invention does not require the purchase of new test equipment. On the basis of the existing test equipment, by adjusting the motor heightening tool and the reducer heightening tool, the transmission shaft with different interfaces, different installation angles, different torque specifications, and different lengths can be subjected to torsional fatigue tests, which has low cost and strong versatility.

[0011] In addition, the above technical solution provided by the present invention may also have the following additional technical features:

[0012] In some technical solutions, optionally, the transmission shaft torsional fatigue test device further includes an input end flange fixture and an output end flange fixture. The input end flange fixture is connected to the driving reducer, and the input end flange fixture is connected to the first end. The output end flange fixture is connected to the load reducer, and the output end flange fixture is connected to the second end. The driving reducer transmits torque to the transmission shaft to be tested through the input end flange fixture; the transmission shaft to be tested transmits torque to the load reducer through the output end flange fixture.

[0013] In this technical solution, by setting the input end flange fixture and the output end flange fixture, on the one hand, it is convenient to transmit torque so that the transmission shaft to be tested can rotate smoothly during the test, simulating the real state of the transmission shaft to be tested in actual working conditions; on the other hand, it is convenient for the staff to disassemble and assemble the transmission shaft to be tested, and realize the test verification of the transmission shaft to be tested with different interfaces.

[0014] In some technical solutions, optionally, the input-end flange fixture is detachably connected to the driving reducer; and the output-end flange fixture is detachably connected to the load reducer.

[0015] In this technical solution, this design method makes it convenient for the staff to disassemble and assemble the input end flange tooling and the output end flange tooling, which is conducive to maintenance or replacement.

[0016] By replacing low-value tools such as the input-end flange tooling and the output-end flange tooling, the drive shaft to be tested with different interfaces can be tested and verified.

[0017] In some technical solutions, optionally, the input-end flange fixture is detachably connected to the first end; and the output-end flange fixture is detachably connected to the second end.

[0018] In this technical solution, this design method makes it convenient for the staff to disassemble and assemble the transmission shaft to be tested, so as to test and verify different types of transmission shafts to be tested according to actual needs.

[0019] In some technical solutions, optionally, a plurality of parallel guide grooves are provided on the test platform, and the guide grooves are arranged along a first direction; the motor heightening tooling, the reducer heightening tooling, the load motor and the load reducer can move relative to the test platform along the first direction through the guide grooves.

[0020] In this technical solution, the motor heightening fixture, the reducer heightening fixture, the load motor and the load reducer can move relative to the test platform along the first direction through the guide groove. The staff can adjust the relative position of each component or device (including the motor heightening fixture, the reducer heightening fixture, the load motor and the load reducer) in the first direction by sliding.

[0021] In addition, when it is necessary to adjust the relative positions of the above components or devices (including the motor heightening tooling, the reducer heightening tooling, the load motor and the load reducer) in the second direction, it is only necessary to move the guide block to another corresponding guide groove.

[0022] By changing the relative positions of the components or devices in the first direction or the second direction in the above manner, it is possible to test and verify transmission shafts of different types and lengths to be tested according to actual needs.

[0023] In some technical solutions, optionally, a plurality of guide grooves are arranged at equal intervals.

[0024] In this technical solution, this design method makes it convenient for the staff to adjust the position of the motor heightening tooling, the reducer heightening tooling, the load motor and the load reducer in the second direction.

[0025] In some technical solutions, optionally, the guide groove is a dovetail groove.

[0026] In this technical solution, this design method can effectively prevent the guide block from disengaging from the guide groove, ensuring the smoothness of the movement of various components or devices (including motor heightening tooling, reducer heightening tooling, load motor and load reducer) relative to the test platform along the first direction.

[0027] In some technical solutions, optionally, the transmission shaft torsional fatigue testing device further includes a first transmission shaft, one end of which is connected to the driving motor, and the other end of which is connected to the driving reducer.

[0028] In this technical solution, the driving reducer and the driving motor are connected to each other through the first transmission shaft. The driving motor can transmit torque to the driving reducer through the first transmission shaft.

[0029] Optionally, the first transmission shaft is detachably connected to the driving reducer; the first transmission shaft is detachably connected to the driving motor. This design makes it convenient for staff to disassemble and assemble the first transmission shaft, which is beneficial for maintenance or replacement.

[0030] In some technical solutions, optionally, the transmission shaft torsional fatigue testing device further includes a second transmission shaft, one end of which is connected to the load motor, and the other end of which is connected to the load reducer.

[0031] In this technical solution, the load reducer and the load motor are connected to each other through the second transmission shaft. The load reducer can transmit torque to the load motor through the second transmission shaft.

[0032] Optionally, the second transmission shaft is detachably connected to the load reducer; the second transmission shaft is detachably connected to the load motor. This design makes it convenient for staff to disassemble and assemble the second transmission shaft, which is beneficial for maintenance or replacement.

[0033] In some technical solutions, optionally, the speed ratio of the driving reducer is a first speed ratio, and the speed ratio of the load reducer is a second speed ratio. The quotient of the output speed of the driving motor divided by the first speed ratio is a first quotient value, and the quotient of the output speed of the load motor divided by the second speed ratio is a second quotient value. The first quotient value is greater than the second quotient value.

[0034] In this technical solution, during the torsional fatigue test of the transmission shaft to be tested, the output speed of the drive motor divided by the first speed ratio of the drive reducer is greater than the output speed of the load motor divided by the second speed ratio of the load reducer. This design method can ensure that the sinusoidal alternating torque output by the drive motor is effectively loaded to the load end.

[0035] Additional aspects and advantages of the technical solutions of the present invention will become apparent in the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A side view of a transmission shaft torsional fatigue testing device according to an embodiment of the present invention is shown;

[0037] Figure 2 A top view of a transmission shaft torsional fatigue testing device according to an embodiment of the present invention is shown.

[0038] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0039] 100: transmission shaft torsional fatigue test device; 110: test platform; 111: guide groove; 121: motor heightening tooling; 122: reducer heightening tooling; 130: driving motor; 131: first motor body; 132: first mounting seat; 140: driving reducer; 141: first reducer body; 142: second mounting seat; 150: load reducer; 151: second reducer body; 152: third mounting seat; 160: load motor; 161: second motor body; 162: fourth mounting seat; 171: transmission shaft to be tested; 1711: first end; 1712: second end; 172: input end flange tooling; 173: output end flange tooling; 174: first transmission shaft; 175: second transmission shaft; a: first direction; b: second direction; c: third direction. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0042] Refer to the following Figure 1 and Figure 2 A transmission shaft torsional fatigue testing device 100 is described according to some embodiments of the present invention.

[0043] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the transmission shaft torsional fatigue test device 100 includes a test platform 110, a motor heightening tool 121, a drive motor 130, a reducer heightening tool 122, a drive reducer 140, a load motor 160, a load reducer 150 and a transmission shaft to be tested 171.

[0044] Among them, the test platform 110 can be understood as a bearing platform. For the motor heightening tooling 121, the drive motor 130, the reducer heightening tooling 122, the drive reducer 140, the load motor 160 and the load reducer 150, the test platform 110 mainly serves as an installation carrier.

[0045] The motor heightening tool 121 is disposed on the test platform 110. Optionally, the motor heightening tool 121 is movably disposed on the test platform 110, and the motor heightening tool 121 can move relative to the test platform 110.

[0046] Optionally, a first guide rail is provided on the test platform 110. The first guide rail is arranged along the first direction a, that is, the length direction of the first guide rail is consistent with the first direction a. When the test platform 110 is a quadrilateral structure, the first direction a is the length direction or width direction of the test platform 110.

[0047] It should be noted that the test platform 110 can be a quadrilateral structure (quadrilateral cross section), or any other structure, such as a triangular structure (triangular cross section), a circular structure (circular cross section), etc.

[0048] The motor heightening fixture 121 can be moved relative to the test platform 110 along the first direction a via the first guide rail.

[0049] The drive motor 130 is arranged on the motor heightening fixture 121. The drive motor 130 and the motor heightening fixture 121 are detachably connected, which is convenient for the staff to disassemble and assemble the motor heightening fixture 121, and is conducive to maintenance or replacement. Optionally, the drive motor 130 and the motor heightening fixture 121 are detachably connected by bolts, screws or other forms of connecting parts, which is convenient and fast, and is conducive to improving the disassembly and assembly efficiency of the staff.

[0050] Alternatively, if Figure 1 As shown, the driving motor 130 includes a first motor body 131 and a first mounting seat 132, and the first motor body 131 is disposed on the first mounting seat 132. Optionally, the first motor body 131 and the first mounting seat 132 are detachably connected; the first mounting seat 132 and the motor heightening tooling 121 are detachably connected.

[0051] Optionally, the driving motor 130 can move relative to the test platform 110 along the first direction a through the motor heightening fixture 121 and the first guide rail.

[0052] The reducer heightening tool 122 is disposed on the test platform 110. Optionally, the reducer heightening tool 122 is movably disposed on the test platform 110, and the reducer heightening tool 122 can move relative to the test platform 110.

[0053] Optionally, a second guide rail is provided on the test platform 110. The second guide rail is arranged along the first direction a, and the length direction of the second guide rail is consistent with the length direction of the first guide rail.

[0054] The reducer heightening tool 122 can be moved relative to the test platform 110 along the first direction a via the second guide rail.

[0055] The driving reducer 140 is arranged on the reducer heightening tooling 122. The driving reducer 140 and the reducer heightening tooling 122 are detachably connected, which is convenient for the staff to disassemble and assemble the reducer heightening tooling 122, and is conducive to maintenance or replacement. Optionally, the driving reducer 140 and the reducer heightening tooling 122 are detachably connected by bolts, screws or other forms of connecting parts, which is convenient and fast, and is conducive to improving the disassembly and assembly efficiency of the staff.

[0056] Alternatively, if Figure 1 As shown, the driving reducer 140 includes a first reducer body 141 and a second mounting seat 142, and the first reducer body 141 is arranged on the second mounting seat 142. Optionally, the first reducer body 141 and the second mounting seat 142 are detachably connected. The second mounting seat 142 and the reducer heightening tooling 122 are detachably connected.

[0057] Optionally, the driving reducer 140 can move relative to the test platform 110 along the first direction a through the reducer heightening tooling 122 and the second guide rail.

[0058] The driving reducer 140 is in transmission connection with the driving motor 130. Optionally, the driving reducer 140 and the driving motor 130 are in transmission connection through a first transmission shaft 174. One end of the first transmission shaft 174 is connected to the driving reducer 140, and the other end of the first transmission shaft 174 is connected to the driving motor 130. The driving motor 130 can transmit torque to the driving reducer 140 through the first transmission shaft 174.

[0059] It should be noted that the driving reducer 140 has a first speed ratio, and the main function of the driving reducer 140 is to reduce the speed and increase the torque to meet the working requirements. The speed ratio of the reducer refers to the ratio of the input speed of the reducer to the output speed of the reducer. Taking the first speed ratio of 10:1 as an example, it means that the input speed of the reducer is 10 times the output speed of the reducer. Ignoring factors such as transmission efficiency, the output torque will increase to 10 times the input torque. In the process of torsional fatigue testing of the transmission shaft 171 to be tested, when the torque output by the driving motor 130 passes through the driving reducer 140, it will increase to the working torque borne by the transmission shaft 171 to be tested on the mine car according to its speed ratio, so as to simulate the torque size borne by the transmission shaft 171 to be tested under actual working conditions, and ensure the accuracy and effectiveness of the test.

[0060] Optionally, the first transmission shaft 174 is arranged along the second direction b, that is, the length direction of the first transmission shaft 174 is consistent with the second direction b. The second direction b is perpendicular to the first direction a. In the case where the first direction a is the length direction of the test platform 110, the second direction b is the width direction of the test platform 110; in the case where the first direction a is the width direction of the test platform 110, the second direction b is the length direction of the test platform 110.

[0061] The load reducer 150 is disposed on the test platform 110. Optionally, the load reducer 150 is movably disposed on the test platform 110, and the load reducer 150 can move relative to the test platform 110.

[0062] Optionally, a third guide rail is provided on the test platform 110. The third guide rail is arranged along the first direction a, and the length direction of the third guide rail is consistent with the length direction of the first guide rail.

[0063] The load reducer 150 can move relative to the test platform 110 along the first direction a via the third guide rail.

[0064] Alternatively, if Figure 1 As shown, the load reducer 150 includes a second reducer body 151 and a third mounting seat 152, and the second reducer body 151 is arranged on the third mounting seat 152. Optionally, the second reducer body 151 and the third mounting seat 152 are detachably connected. The third mounting seat 152 is slidably connected to the test platform 110 through a third guide rail, so that the load reducer 150 can move relative to the test platform 110 along the first direction a.

[0065] The load motor 160 is disposed on the test platform 110 . Optionally, the load motor 160 is movably disposed on the test platform 110 , and the load motor 160 can move relative to the test platform 110 .

[0066] Optionally, a fourth guide rail is provided on the test platform 110. The fourth guide rail is arranged along the first direction a, and the length direction of the fourth guide rail is consistent with the length direction of the first guide rail.

[0067] It should be noted that the first rail, the second rail, the third rail and the fourth rail are arranged in parallel and sequentially along the second direction b. Optionally, the first rail, the second rail, the third rail and the fourth rail have the same structure and are all guide grooves 111 on the test platform 110 .

[0068] The load motor 160 can move relative to the test platform 110 along the first direction a via the fourth guide rail.

[0069] Alternatively, if Figure 1As shown, the load motor 160 includes a second motor body 161 and a fourth mounting seat 162, and the second motor body 161 is arranged on the fourth mounting seat 162. Optionally, the second motor body 161 and the fourth mounting seat 162 are detachably connected. The fourth mounting seat 162 is slidably connected to the test platform 110 through a fourth guide rail, so that the load motor 160 can move relative to the test platform 110 along the first direction a.

[0070] The load reducer 150 is transmission-connected to the load motor 160. Optionally, the load reducer 150 and the load motor 160 are transmission-connected via a second transmission shaft 175. One end of the second transmission shaft 175 is connected to the load reducer 150, and the other end of the second transmission shaft 175 is connected to the load motor 160. The load reducer 150 can transmit torque to the load motor 160 via the second transmission shaft 175.

[0071] Optionally, the second transmission shaft 175 is arranged along the second direction b, that is, the length direction of the second transmission shaft 175 is consistent with the second direction b.

[0072] Optionally, the motor heightening fixture 121 is a first plate-shaped structure, and the reducer heightening fixture 122 is a second plate-shaped structure. The size of the first plate-shaped structure in the third direction c is equal to the size of the second plate-shaped structure in the third direction c.

[0073] The third direction c is the thickness direction of the test platform 110. Optionally, the size of the motor heightening fixture 121 in the third direction c is the thickness of the first plate-like structure; the size of the reducer heightening fixture 122 in the third direction c is the thickness of the second plate-like structure. In other words, the motor heightening fixture 121 and the reducer heightening fixture 122 are set at the same height.

[0074] It should be noted that the thickness of the motor heightening fixture 121 (the dimension of the motor heightening fixture 121 in the third direction c) is equal to the length of the transmission shaft 171 to be tested multiplied by the sine value of the Z-direction installation angle (the installation angle in the third direction c).

[0075] The transmission shaft torsional fatigue test device 100 of the present invention can perform torsional fatigue tests on the transmission shaft 171 to be tested at different installation angles by replacing the motor heightening tooling 121 and the reducer heightening tooling 122, and adjusting the relative positions among the drive motor 130, the drive reducer 140, the load reducer 150 and the load motor 160. It has low cost and strong versatility.

[0076] Specifically, by replacing the motor heightening fixture 121 and the speed reducer heightening fixture 122, the Z-direction installation angle (the installation angle in the third direction c) of the transmission shaft 171 to be tested in actual working conditions can be simulated. By adjusting the relative positions among the drive motor 130, the drive speed reducer 140, the load speed reducer 150, and the load motor 160, the Y-direction installation angle (the installation angle in the first direction a) of the transmission shaft 171 to be tested in actual working conditions can be simulated.

[0077] The transmission shaft 171 to be tested has a first end 1711 and a second end 1712 arranged opposite to each other. The first end 1711 is used to connect to the driving reducer 140, and the second end 1712 is used to connect to the load reducer 150. Optionally, the transmission shaft 171 to be tested is detachably connected to the driving reducer 140, and the transmission shaft 171 to be tested is detachably connected to the load reducer 150. This design makes it convenient for the staff to disassemble and assemble (disassemble and install) the transmission shaft 171 to be tested, which is conducive to maintenance or replacement.

[0078] Since the driving motor 130 is arranged on the test platform 110 through the motor heightening fixture 121, and the driving reducer 140 is arranged on the test platform 110 through the reducer heightening fixture 122, the height of the first end 1711 of the transmission shaft 171 to be tested is greater than the height of the second end 1712 of the transmission shaft 171 to be tested.

[0079] During the torsional fatigue test of the transmission shaft 171 to be tested, the driving motor 130 transmits torque to the load motor 160 via the driving reducer 140 , the transmission shaft 171 to be tested and the load reducer 150 .

[0080] The present invention aims to provide a transmission shaft torsional fatigue test device 100. By adding a motor heightening fixture 121 and a reducer heightening fixture 122, the first end 1711 of the transmission shaft 171 to be tested can be made higher than the second end 1712, thereby simulating the actual use condition of the transmission shaft 171 to be tested on a mine car, and verifying the reliability and life of the transmission shaft 171 to be tested, which is conducive to improving the accuracy of the test results. After the transmission shaft that has been verified by the test is mounted on the mine car, the possibility of after-sales failure can be effectively reduced. In addition, the transmission shaft torsional fatigue test device 100 provided by the present invention does not need to repurchase test equipment. On the basis of the existing test equipment, by adjusting the motor heightening fixture 121 and the reducer heightening fixture 122, the transmission shaft with different interfaces, different installation angles, different torque specifications, and different lengths can be subjected to torsional fatigue tests, which is low in cost and has strong versatility.

[0081] It should be noted that if Figure 1 and Figure 2As shown, the first direction a in the present invention is the Y direction (which can be understood as the Y-axis direction of the coordinate system); the second direction b is the X direction (which can be understood as the X-axis direction of the coordinate system); and the third direction c is the Z direction (which can be understood as the Z-axis direction of the coordinate system).

[0082] In some embodiments, optionally, the torque output by the drive motor 130 is transmitted to the drive reducer 140 through the first transmission shaft 174, and the torque output by the drive motor 130 is increased to the working torque that the test drive shaft 171 needs to bear on the mine car through the first speed ratio of the drive reducer 140. The increased torque is transmitted to the load reducer 150 through the test drive shaft 171, and then transmitted to the load motor 160 through the second transmission shaft 175. The above is the torque transmission route of the entire test.

[0083] Regarding adjusting the installation angle of the transmission shaft 171 to be tested:

[0084] A motor heightening fixture 121 and a speed reducer heightening fixture 122 of equal height are added below the drive motor 130 and the drive speed reducer 140, respectively. After the input end (here, the drive motor 130 and the drive speed reducer 140) is heightened, the first end 1711 of the drive shaft 171 to be tested is raised, and the height of the second end 1712 of the drive shaft 171 to be tested remains unchanged, so as to achieve the installation angle of the drive shaft 171 to be tested in the Z direction (i.e., the Z-direction installation angle) to simulate the actual installation angle of the drive shaft 171 to be tested on the mine car. The heights of the motor heightening fixture 121 and the speed reducer heightening fixture 122 need to be calculated and confirmed according to the Z-direction installation angle of the drive shaft 171 to be tested.

[0085] In addition, the offset positions of the load reducer 150 and the load motor 160 in the X and Y directions are adjusted on the guide rail platform (test platform 110). During the adjustment, ensure that the load reducer 150 and the load motor 160 are coaxial. The adjusted offset is calculated and confirmed based on the installation length and Y-direction installation angle of the transmission shaft 171 to be tested on the mine car.

[0086] In some embodiments, optionally, the drive motor 130 serves as a torque loading end and outputs a sinusoidal alternating torque. The maximum torque output by the drive motor 130 multiplied by the reduction ratio (first speed ratio) of the drive reducer 140 is equal to the maximum working torque carried by the drive shaft 171 to be tested on the mine car. The minimum test torque output by the drive motor 130 is 30% of the maximum torque. The load motor 160 serves as a load terminal, and the load motor 160 outputs a constant torque. The torque value output by the load motor 160 multiplied by the second speed ratio of the load reducer 150 is equal to the maximum torque output by the drive motor 130 multiplied by the first speed ratio of the drive reducer 140.

[0087] During the torsional fatigue test of the transmission shaft 171 to be tested, the output speed of the driving motor 130 divided by the first speed ratio of the driving reducer 140 is greater than the output speed of the load motor 160 divided by the second speed ratio of the load reducer 150. This design can ensure that the sinusoidal alternating torque output by the driving motor 130 is effectively loaded to the load end (here, the load reducer 150 and the load motor 160).

[0088] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the transmission shaft torsional fatigue test device 100 also includes an input end flange fixture 172 and an output end flange fixture 173. The input end flange fixture 172 is connected to the driving reducer 140, and the input end flange fixture 172 is connected to the first end 1711. The output end flange fixture 173 is connected to the load reducer 150, and the output end flange fixture 173 is connected to the second end 1712. The driving reducer 140 transmits torque to the transmission shaft 171 to be tested through the input end flange fixture 172; the transmission shaft 171 to be tested transmits torque to the load reducer 150 through the output end flange fixture 173.

[0089] By setting the input end flange fixture 172 and the output end flange fixture 173, on the one hand, it is convenient to transmit torque so that the transmission shaft 171 to be tested can rotate smoothly during the test, simulating the real state of the transmission shaft 171 to be tested in actual working conditions; on the other hand, it is convenient for the staff to disassemble and assemble the transmission shaft 171 to be tested, so as to realize the test verification of the transmission shaft 171 to be tested with different interfaces.

[0090] It should be noted that, since the motor heightening tooling 121 and the reducer heightening tooling 122 are respectively added below the driving motor 130 and the driving reducer 140, the input end flange tooling 172 is higher than the output end flange tooling 173 (the height of the input end flange tooling 172 is greater than the height of the output end flange tooling 173), and the first end 1711 of the tested transmission shaft 171 is higher than the second end 1712, thereby simulating the actual use condition of the tested transmission shaft 171 on the mine car.

[0091] The transmission shaft 171 to be tested is connected to the driving reducer 140 and the load reducer 150 on both sides respectively through the input flange fixture and the output flange fixture.

[0092] In some embodiments, optionally, the input end flange fixture 172 and the driving reducer 140 are detachably connected.

[0093] This design makes it easy for the staff to disassemble and assemble the input flange fixture 172, which is conducive to maintenance or replacement. Optionally, the input flange fixture 172 and the driving reducer 140 are detachably connected by bolts, screws or other forms of connecting parts, which is convenient and fast, and is conducive to improving the disassembly and assembly efficiency of the staff.

[0094] In some embodiments, optionally, the output end flange fixture 173 and the load reducer 150 are detachably connected.

[0095] This design makes it easy for the staff to disassemble and assemble the output flange fixture 173, which is conducive to maintenance or replacement. Optionally, the output flange fixture 173 and the load reducer 150 are detachably connected by bolts, screws or other forms of connectors, which is convenient and fast, and is conducive to improving the disassembly and assembly efficiency of the staff.

[0096] It should be noted that by replacing low-value tools such as the input-end flange tool 172 and the output-end flange tool 173 , the transmission shaft 171 to be tested with different interfaces can be tested and verified.

[0097] In some embodiments, optionally, the input end flange fixture 172 is detachably connected to the first end 1711 ; the output end flange fixture 173 is detachably connected to the second end 1712 .

[0098] This design makes it convenient for the staff to disassemble and assemble the transmission shaft 171 to be tested, so as to test and verify different types of transmission shafts 171 to be tested according to actual needs.

[0099] Optionally, the input end flange fixture 172 is detachably connected to the first end 1711 of the transmission shaft 171 to be tested by bolts, screws or other forms of connectors. The output end flange fixture 173 is detachably connected to the second end 1712 of the transmission shaft 171 to be tested by bolts, screws or other forms of connectors.

[0100] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the test platform 110 is provided with a plurality of parallel guide grooves 111, which are arranged along the first direction a. The motor heightening fixture 121, the reducer heightening fixture 122, the load motor 160 and the load reducer 150 can move relative to the test platform 110 along the first direction a through the guide grooves 111.

[0101] Optionally, a first guide block is provided on the motor heightening fixture 121, and at least a portion of the first guide block is disposed in the corresponding guide groove 111. Through the cooperation between the first guide block and the guide groove 111, the sliding connection between the motor heightening fixture 121 and the test platform 110 can be achieved, and the motor heightening fixture 121 can move relative to the test platform 110 along the first direction a.

[0102] It should be noted that the cross-sectional shape of the first guide block is matched with the cross-sectional shape of the guide groove 111 to ensure the stability of the motor heightening fixture 121 moving relative to the test platform 110 along the first direction a.

[0103] Optionally, a second guide block is provided on the reducer heightening fixture 122, and at least a portion of the second guide block is disposed in the corresponding guide groove 111. Through the cooperation between the second guide block and the guide groove 111, the reducer heightening fixture 122 and the test platform 110 can be slidably connected, and the reducer heightening fixture 122 can move relative to the test platform 110 along the first direction a.

[0104] It should be noted that the cross-sectional shape of the second guide block is matched with the cross-sectional shape of the guide groove 111 to ensure the stability of the speed reducer heightening fixture 122 moving relative to the test platform 110 along the first direction a.

[0105] Optionally, the load reducer 150 has a third guide block, and at least a portion of the third guide block is disposed in the corresponding guide groove 111. Through the cooperation between the third guide block and the guide groove 111, the sliding connection between the load reducer 150 and the test platform 110 can be achieved, and the load reducer 150 can move relative to the test platform 110 along the first direction a. Optionally, in the load reducer 150, the third guide block is disposed on a side of the third mounting seat 152 away from the second reducer body 151.

[0106] It should be noted that the cross-sectional shape of the third guide block is matched with the cross-sectional shape of the guide groove 111 to ensure the stability of the load reducer 150 moving relative to the test platform 110 along the first direction a.

[0107] Optionally, the load motor 160 has a fourth guide block, and at least a portion of the fourth guide block is disposed in the corresponding guide groove 111. Through the mutual cooperation between the fourth guide block and the guide groove 111, the load motor 160 and the test platform 110 can be slidably connected, and the load motor 160 can move relative to the test platform 110 along the first direction a. Optionally, in the load motor 160, the fourth guide block is disposed on a side of the fourth mounting seat 162 away from the second motor body 161.

[0108] It should be noted that the cross-sectional shape of the fourth guide block is matched with the cross-sectional shape of the guide groove 111 to ensure the stability of the movement of the load motor 160 relative to the test platform 110 along the first direction a.

[0109] The motor heightening fixture 121, the reducer heightening fixture 122, the load motor 160 and the load reducer 150 can move relative to the test platform 110 along the first direction a through the guide groove 111. The staff can adjust the relative positions of various components or devices (including the motor heightening fixture 121, the reducer heightening fixture 122, the load motor 160 and the load reducer 150) in the first direction a by sliding.

[0110] In addition, when it is necessary to adjust the relative positions of the above components or devices (including the motor heightening tooling 121, the reducer heightening tooling 122, the load motor 160 and the load reducer 150) in the second direction b, it is only necessary to move the guide block to another corresponding guide groove 111.

[0111] By changing the relative positions of various components or devices in the first direction a or the second direction b in the above manner, it is possible to test and verify the transmission shafts 171 to be tested of different types and lengths according to actual needs.

[0112] In some embodiments, optionally, a plurality of guide grooves 111 are arranged at equal intervals.

[0113] This design makes it convenient for the staff to adjust the positions of the motor heightening fixture 121 , the reducer heightening fixture 122 , the load motor 160 , and the load reducer 150 in the second direction b.

[0114] In some embodiments, optionally, the guide groove 111 is a dovetail groove.

[0115] This design can effectively prevent the guide block from disengaging from the guide groove 111, ensuring the smooth movement of various components or devices (including the motor heightening tooling 121, the reducer heightening tooling 122, the load motor 160 and the load reducer 150) relative to the test platform 110 along the first direction a.

[0116] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the transmission shaft torsional fatigue testing device 100 further includes a first transmission shaft 174 . One end of the first transmission shaft 174 is connected to the driving motor 130 , and the other end of the first transmission shaft 174 is connected to the driving reducer 140 .

[0117] The driving reducer 140 and the driving motor 130 are connected in transmission via the first transmission shaft 174 . The driving motor 130 can transmit torque to the driving reducer 140 via the first transmission shaft 174 .

[0118] Optionally, the first transmission shaft 174 is detachably connected to the driving reducer 140; the first transmission shaft 174 is detachably connected to the driving motor 130. This design makes it convenient for the staff to disassemble and assemble the first transmission shaft 174, which is conducive to maintenance or replacement.

[0119] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the transmission shaft torsional fatigue testing device 100 further includes a second transmission shaft 175 . One end of the second transmission shaft 175 is connected to the load motor 160 , and the other end of the second transmission shaft 175 is connected to the load reducer 150 .

[0120] The load reducer 150 and the load motor 160 are connected in transmission via the second transmission shaft 175 . The load reducer 150 can transmit torque to the load motor 160 via the second transmission shaft 175 .

[0121] Optionally, the second transmission shaft 175 is detachably connected to the load reducer 150; the second transmission shaft 175 is detachably connected to the load motor 160. This design makes it convenient for the staff to disassemble and assemble the second transmission shaft 175, which is conducive to maintenance or replacement.

[0122] In some embodiments, optionally, the speed ratio of the driving reducer 140 is a first speed ratio, and the speed ratio of the load reducer 150 is a second speed ratio. The output speed of the driving motor 130 divided by the first speed ratio is a first quotient value, and the output speed of the load motor 160 divided by the second speed ratio is a second quotient value. The first quotient value is greater than the second quotient value.

[0123] During the torsional fatigue test of the transmission shaft 171 to be tested, the output speed of the driving motor 130 divided by the first speed ratio of the driving reducer 140 is greater than the output speed of the load motor 160 divided by the second speed ratio of the load reducer 150. This design can ensure that the sinusoidal alternating torque output by the driving motor 130 is effectively loaded to the load end (here, the load reducer 150 and the load motor 160).

[0124] In some embodiments, optionally, in the first vertical plane, the angle between the projection of the transmission shaft 171 to be tested on the first vertical plane and the projection of the test platform 110 on the first vertical plane is a first angle. The top surface of the test platform 110 is perpendicular to the first vertical plane; the axis of the transmission shaft 171 to be tested is parallel to the first vertical plane.

[0125] It should be noted that the first angle here is the Z-direction installation angle.

[0126] The advantages of the present invention are: the driving motor 130, the first transmission shaft 174, the driving reducer 140, the load reducer 150, the second transmission shaft 175, the load motor 160 and the test platform 110, these high-value test equipment do not need to be purchased again, and the main engine factory test department can borrow the existing test equipment. By replacing the low-value tools such as the input end flange tool 172, the output end flange tool 173, the motor heightening tool 121, and the reducer heightening tool 122, the test verification of the transmission shaft 171 to be tested with different interfaces and different installation angles can be achieved; by adjusting the output torque of the driving motor 130 and the load motor 160, the test verification of the transmission shaft 171 to be tested with different torque specifications or requirements can be achieved.

[0127] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0128] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0129] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0130] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transmission shaft torsional fatigue test device, characterized in that: include: Test platform (110); A motor heightening tool (121) is arranged on the test platform (110); A driving motor (130) is arranged on the motor heightening tooling (121); A reducer heightening tool (122) is arranged on the test platform (110); A driving reducer (140) is arranged on the reducer heightening tooling (122), and the driving reducer (140) is drivingly connected to the driving motor (130); A load motor (160) is disposed on the test platform (110); A load reducer (150) is disposed on the test platform (110), and the load reducer (150) is drivingly connected to the load motor (160); The transmission shaft (171) to be tested has a first end (1711) and a second end (1712) arranged opposite to each other, the first end (1711) being used to connect to the driving reducer (140), the second end (1712) being used to connect to the load reducer (150), and the height of the first end (1711) being greater than the height of the second end (1712); The driving motor (130) transmits torque to the load motor (160) through the driving reducer (140), the transmission shaft to be tested (171) and the load reducer (150).

2. The transmission shaft torsional fatigue testing device according to claim 1, characterized in that: Also includes: An input end flange fixture (172) is connected to the driving reducer (140), and the input end flange fixture (172) is connected to the first end (1711); An output end flange fixture (173) is connected to the load reducer (150), and the output end flange fixture (173) is connected to the second end (1712); The driving reducer (140) transmits torque to the transmission shaft to be tested (171) through the input end flange fixture (172); and the transmission shaft to be tested (171) transmits torque to the load reducer (150) through the output end flange fixture (173).

3. The transmission shaft torsional fatigue testing device according to claim 2, characterized in that: The input end flange fixture (172) is detachably connected to the driving reducer (140); and the output end flange fixture (173) is detachably connected to the load reducer (150).

4. The transmission shaft torsional fatigue testing device according to claim 2, characterized in that: The input end flange fixture (172) and the first end (1711) are detachably connected; and the output end flange fixture (173) and the second end (1712) are detachably connected.

5. The transmission shaft torsional fatigue testing device according to any one of claims 1 to 4, characterized in that: The test platform (110) is provided with a plurality of parallel guide grooves (111), and the guide grooves (111) are arranged along a first direction; The motor heightening tool (121), the reducer heightening tool (122), the load motor (160), and the load reducer (150) can move relative to the test platform (110) along the first direction through the guide groove (111).

6. The transmission shaft torsional fatigue testing device according to claim 5, characterized in that: The plurality of guide grooves (111) are arranged at equal intervals.

7. The transmission shaft torsional fatigue testing device according to claim 5, characterized in that: The guide groove (111) is a dovetail groove.

8. The transmission shaft torsional fatigue testing device according to any one of claims 1 to 4, characterized in that: Also includes: A first transmission shaft (174), one end of the first transmission shaft (174) is connected to the driving motor (130), and the other end of the first transmission shaft (174) is connected to the driving reducer (140).

9. The transmission shaft torsional fatigue testing device according to any one of claims 1 to 4, characterized in that: Also includes: A second transmission shaft (175), one end of the second transmission shaft (175) is connected to the load motor (160), and the other end of the second transmission shaft (175) is connected to the load reducer (150).

10. The transmission shaft torsional fatigue testing device according to any one of claims 1 to 4, characterized in that: The speed ratio of the driving reducer (140) is a first speed ratio, and the speed ratio of the load reducer (150) is a second speed ratio; The quotient of the output speed of the drive motor (130) divided by the first speed ratio is a first quotient, and the quotient of the output speed of the load motor (160) divided by the second speed ratio is a second quotient; The first quotient value is greater than the second quotient value.

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