Gearbox loading test device
By designing a gearbox loading test device including a test gearbox and a sports support device, the problems of high equipment cost and high energy consumption in the prior art are solved, and the cost-effectiveness of gearbox loading test is realized, ensuring the testing Reduced accuracy and cost.
Patent Information
- Application Number
- CN202411519818.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2024-12-10
AI Technical Summary
The existing gearbox loading test methods have problems such as high equipment cost and high energy consumption, especially the dual-motor towing loading scheme, which is difficult to apply in small-scale or cost-sensitive projects.
A gearbox loading test device including a test gear box, a motion support device, an output torque transmission device, an input torque transmission device and a driving motor is designed. The input terminal is driven to generate a target torque through the motion support device of the test gear box, and the target torque is driven. The motor drives the accompanying test gearbox to overcome the friction in the test system and selects a motor with less power to reduce costs and energy consumption.
The gearbox loading test device is realized with low cost and low energy consumption. Through the use of torque measurement flange and torque sensor, the motor and electric cylinder movement is accurately controlled, ensuring that variables are controlled during loading tests and the gearbox of the subject is tested. performance, reducing overall cost and energy consumption.
Smart Images
Figure CN119104296A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of gearbox testing, and in particular to a gearbox loading test device. Background Art
[0002] As a key component in various types of mechanical equipment, the performance of the gearbox directly affects the quality and operational stability of the entire system. In order to ensure the reliability and durability of the gearbox, a loading and running-in test is usually required after assembly to verify whether its temperature, vibration, meshing, sealing, etc. meet the standards. This test is of great significance for improving product quality and life, and has a wide range of application value in the field of industrial machinery and equipment. At present, the loading test schemes for gearboxes mainly include dual motor pair loading, eddy current brake loading, and magnetic powder brake loading. Among them, the dual motor pair loading method performs loading tests through the mutual drive between a pair of motors, the eddy current brake loading method loads through the braking torque generated by eddy currents, and the magnetic powder brake loading method loads through the friction torque generated by magnetic powder. These loading test methods are widely used at home and abroad due to their specific application range and test accuracy. However, the above traditional loading test methods have certain shortcomings, especially the dual-motor towing loading scheme often requires the configuration of high-power motors and complex control systems, resulting in high equipment costs; although the eddy current brake loading and magnetic powder brake loading methods have advantages in some application scenarios, they are not economically applicable for some small-scale or cost-sensitive projects due to their complex principles and high energy consumption. Therefore, designing a gearbox loading test device with low cost and low energy consumption has become an important technical issue. Summary of the invention
[0003] In order to design a gearbox loading test device with low cost and low energy consumption, the present application provides a gearbox loading test device.
[0004] The present application provides a gearbox loading test device, which adopts the following technical solution: A gearbox loading test device comprises a test gearbox, a tested gearbox, a motion support device, an output torque transmission device, an input torque transmission device, a drive motor and a drive connection device, wherein the motion support device is used to support the input end of the test gearbox and drive the input end of the test gearbox to move; the output shaft of the test gearbox is connected to the long axis of the tested gearbox through the output torque transmission device; the input torque transmission device is used to connect the input shaft of the test gearbox and the input shaft of the tested gearbox; the drive motor is located on a side of the test gearbox away from the tested gearbox, and the drive motor is connected to the test gearbox through the drive connection device.
[0005] By adopting the above technical scheme, the gearbox loading test device has the effect of low cost and low energy consumption. The motion support device under the input end of the test gearbox is used to push the input end of the test gearbox to move to the specified position to generate the target torque. The drive motor drives the test gearbox to overcome the friction in the test system. In this way, a motor with smaller power can be selected, and then the frequency converter can also select a smaller power. The smaller the power, the lower the cost, thereby achieving the purpose of reducing the overall cost and reducing energy consumption.
[0006] Optionally, the accompanying test gearbox is a customized gearbox, and its structure is the same as that of the tested gearbox, except that the axle adopts a shortened dummy shaft and the input shaft adopts a reverse direction design.
[0007] By adopting the above technical solution, the companion test gearbox is a customized gearbox, which needs to be assembled according to the same structure as the gearbox under test. Compared with the gearbox under test, the difference is that the axle adopts a shortened dummy shaft and the input shaft adopts a reverse design; the rest of the parts are the same, and the transmission ratio is also the same. The use of this companion test gearbox can ensure the control of variables during the loading test, and conduct comparative analysis, which can better test the performance of the gearbox under test.
[0008] Optionally, the motion support device includes a servo electric cylinder, a suspension rod and a first support seat, and the servo electric cylinder drives the accompanying test gear box to move through the suspension rod.
[0009] By adopting the above technical solution, the input end of the accompanying test gearbox can be supported by the first support seat, and the accompanying test gearbox can be driven to move by the servo electric cylinder to drive the suspension rod.
[0010] Optionally, the output torque transmission device includes a first shaft end support seat, a test output shaft sleeve, a torque measuring flange, a universal joint, a test output shaft sleeve and a second shaft end support seat, and the test output shaft sleeve and the test output shaft sleeve are both interference fit with the axle and have built-in deep groove ball bearings.
[0011] By adopting the above technical scheme, the output end of the test gearbox can be supported by the shaft end support seat; the output shaft of the test gearbox and the output shaft of the tested gearbox can be connected through the test output shaft sleeve, the torque measuring flange, the universal shaft and the tested output shaft sleeve; by setting the shaft sleeves at both ends of the output torque transmission device and the axle to be interference fit, and the shaft sleeves have built-in deep groove ball bearings, it can be ensured that the shaft can rotate flexibly during the test.
[0012] Optionally, the end face of the output shaft sleeve under test is crown-shaped, and the output shaft sleeve under test and the universal shaft transmit torque via crown teeth and are fixed with bolts; the torque measuring flange is used to synchronously measure the torque of the output shaft.
[0013] By adopting the above technical solution, the torque can be transmitted through the crown teeth on the output sleeve under test, and the output torque can be synchronously measured through the torque measuring flange.
[0014] Optionally, the input torque transmission device includes an input shaft sleeve, a high-speed bearing box, a first flange assembly and a second flange assembly; the second flange assembly is provided with a torque sensor for measuring the input torque and feeding back torque data.
[0015] By adopting the above technical solution, the input end of the accompanying test gearbox and the input end of the tested gearbox can be connected through the input shaft sleeve, the high-speed bearing box, the first flange combination and the second flange combination; and the input torque can be measured and fed back through the torque sensor.
[0016] Optionally, the input sleeve and the input shaft of the companion gearbox are interference fit, the input sleeve and the input shaft of the tested gearbox are interference fit, the first flange combination and the second flange combination are bolted to the input sleeve; a third support seat is provided under the high-speed bearing box.
[0017] By adopting the above technical solution, the input sleeves on both sides of the input torque transmission device are interference fit with the input shaft, the first flange combination and the second flange combination are bolted to the input sleeve, and the third support seat provides support for the high-speed bearing box and ensures that energy loss is reduced during a longer torque transmission process.
[0018] Optionally, a PLC controller is also included, and the torque measuring flange, the torque sensor and the servo electric cylinder are all electrically connected to the PLC controller.
[0019] By adopting the above technical solution, the input torque and the output torque are proportional, and the coefficient is the transmission ratio of the gearbox; when the torque sensor in the input torque transmission device collects the torque, it will be transmitted to the PLC controller, and the PLC controller will compare the collected torque with the target torque, further control the movement of the servo electric cylinder, and drive the companion test gearbox to move further through the boom until the target torque is reached.
[0020] Optionally, the drive connection device includes a motor shaft connection flange, a drive connection flange, a drive sleeve and a second support seat.
[0021] By adopting the above technical solution, the drive motor is connected to the accompanying test gearbox through the motor shaft connecting flange, the drive connecting flange, the drive shaft sleeve and the second support seat, so that the drive motor can drive the accompanying test gearbox to overcome the friction in the test system.
[0022] Optionally, the input end of the tested gearbox is provided with an input end supporting tooling, and the input end supporting tooling is used to support the input end of the tested gearbox; the output end of the tested gearbox is provided with an output short shaft side supporting device, and the output short shaft side supporting device is used to support the output shaft of the tested gearbox.
[0023] By adopting the above technical solution, the input end of the tested gearbox can be supported by the input end supporting tooling; and the output end of the tested gearbox can be supported by the output short shaft side supporting device.
[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The gearbox loading test device of the present invention has low cost and low energy consumption. The motion support device below the input end of the accompanying test gearbox is used to push the input end of the accompanying test gearbox to move to a specified position to generate a target torque. The driving motor drives the accompanying test gearbox to overcome the friction in the test system. In this way, a motor with a smaller power can be selected, and then the frequency converter can also select a smaller power. The smaller the power, the lower the cost, thereby achieving the purpose of reducing the overall cost and reducing energy consumption; 2. The torque of the input gear and output gear is read through the torque measuring flange and torque sensor, and fed back to the PLC controller, which accurately controls the movement of the motor and electric cylinder to meet the specified torque test; 3. The test gearbox of the present invention is a customized gearbox, which needs to be assembled according to the same structure as the gearbox under test. Compared with the gearbox under test, the difference is that the axle adopts a shortened dummy shaft and the input shaft adopts a reverse design; the rest of the parts are the same, and the transmission ratio is also the same. The use of this test gearbox can ensure the control of variables during the loading test, and conduct comparative analysis, which can better test the performance of the gearbox under test.
[0025] 4. The output torque transmission device of the present invention supports the output shaft through a support seat, and the sleeves at both ends are interference fit with the axles, and the sleeves have built-in deep groove ball bearings, which can ensure that the shaft can rotate flexibly during the test; and the end face of the output sleeve has crown teeth, which transmit torque to the universal shaft through the crown teeth and are fixed with bolts. At the same time, the device includes a torque flange, that is, a flange with a torque sensor, which can synchronously measure the torque of the output shaft, thereby meeting the purposes of supporting the axle, transmitting torque and measuring torque.
[0026] 5. The input sleeves on both sides of the input torque transmission device in the present invention are interference fit with the input shaft, the first flange combination and the second flange combination are bolted to the input sleeves, the third support seat provides support for the high-speed bearing box and ensures that energy loss is reduced during a longer torque transmission process; the second flange combination with a torque sensor provides torque measurement and feedback functions for the input shaft. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a partial structural schematic diagram of the motion support device in an embodiment of the present application; Figure 3 is a partial structural schematic diagram of the output torque transmission device in an embodiment of the present application; Figure 4 is a partial structural schematic diagram of an input torque transmission device in an embodiment of the present application; Figure 5 It is a partial structural diagram of the driving connection device in the embodiment of the present application.
[0028] Explanation of the accompanying reference numerals: 1. test gearbox; 2. tested gearbox; 3. motion support device; 31. servo electric cylinder; 32. suspension rod; 33. first support seat; 4. output torque transmission device; 41. first shaft end support seat; 42. test output shaft sleeve; 43. torque measuring flange; 44. universal joint; 45. tested output shaft sleeve; 46. second shaft end support seat; 5. input torque transmission device; 51. input shaft sleeve; 52. high-speed bearing box; 53. first flange combination; 54. second flange combination; 55. third support seat; 6. driving motor; 7. driving connection device; 71. motor shaft connecting flange; 72. driving connection flange; 73. driving shaft sleeve; 74. second support seat; 8. output short shaft side support device; 9. input end support tooling. DETAILED DESCRIPTION
[0029] The following is combined with Figure 1-5 This application is described in further detail.
[0030] The present application embodiment discloses a gearbox loading test device. Figure 1A gearbox loading test device includes a test gearbox 1, a tested gearbox 2, a motion support device 3, an output torque transmission device 4, an input torque transmission device 5, a drive motor 6, a drive connection device 7, an output short shaft side support device 8 and an input end support tooling 9. Among them, the motion support device 3 is used to support the input end of the test gearbox 1 and drive the input end of the test gearbox 1 to move; the output shaft of the test gearbox 1 is connected to the long shaft of the tested gearbox 2 through the output torque transmission device 4; the input torque transmission device 5 is used to connect the input shaft of the test gearbox 1 with the input shaft of the tested gearbox 2; the drive motor 6 is located on the side of the test gearbox 1 away from the tested gearbox 2, and is connected to the tested gearbox 2 through the drive connection device 7; the input end support tooling 9 is used to support the input end of the tested gearbox 2; the output short shaft side support device 8 is used to support the output shaft of the tested gearbox 2. The effect of reducing the test cost and improving the test efficiency can be achieved, and the loading running-in test of the gearbox can be effectively realized. Specifically, by adopting a self-supporting structural design, the entire test device has lower cost and lower operating energy consumption.
[0031] Reference Figure 1 and Figure 2The motion support device 3 includes a servo electric cylinder 31, a suspension rod 32 and a first support seat 33. The servo electric cylinder 31 mainly includes an electric cylinder body and an electric cylinder mounting seat. The electric cylinder body can adopt different types of electric cylinders such as screw type, ball screw type or linear motor drive. The electric cylinder body and the electric cylinder mounting seat can be connected by bolt connection or other fastening methods. The electric cylinder mounting seat can be directly installed on the bearing platform to ensure the stability of the electric cylinder body. Through the precise control of the servo motor, the fine adjustment and high-precision control of the input shaft are achieved. The suspension rod 32 is connected to the electric cylinder body and the accompanying test gearbox 1. The main structure of the suspension rod 32 is generally made of medium carbon steel or alloy steel to ensure strength and durability. The suspension rod 32 can be connected to the electric cylinder body and the accompanying test gearbox 1 by bolt connection. The design of the suspension rod 32 must ensure that it can withstand the load and torque applied to the accompanying test gearbox 1. The first support seat 33 is used to fix the suspension rod 32 and support the input end of the accompanying test gearbox 1. The first support seat 33 is generally manufactured by casting to ensure its load-bearing capacity and stability. The first support seat 33 is provided with a hole or groove that matches the suspension rod 32. The suspension rod 32 is fixed to the first support seat 33 by bolts or other fasteners to ensure the integrity of the entire motion support device 3. Through the precise control of the servo electric cylinder 31, the suspension rod 32 can drive the test gearbox 1 to move in the vertical direction, so that the input shaft of the test gearbox 1 can be accurately aligned with the input shaft of the tested gearbox 2 to achieve the assembly of the test bench. In addition, through the cooperation between the suspension rod 32 and the first support seat 33, the stability and accuracy of the test gearbox 1 during the movement can be ensured. For example, the encoder in the servo electric cylinder 31 can monitor the position of the electric cylinder in real time, realize closed-loop control through the PLC controller, and then realize the height adjustment of the input end of the test gearbox 1, which is used to apply a specified torque to the test system.
[0032] Reference Figure 1 and Figure 3The output torque transmission device 4 includes a first shaft end support seat 41, a test output shaft sleeve 42, a torque measurement flange 43, a universal shaft 44, a test output shaft sleeve 45 and a second shaft end support seat 46. The first shaft end support seat 41 is used to fix the output shaft of the test gearbox 1. The first shaft end support seat 41 can adopt a ladder-shaped columnar structure, which is manufactured by casting, and the height is adjusted by accumulating gaskets of various thicknesses to adapt to different gearboxes. The material of the first shaft end support seat 41 can be high-strength steel or aluminum alloy, and its dimensional accuracy is ensured by precision machining. The second shaft end support seat 46 is fixed to the test output shaft sleeve 45 of the test gearbox 2 by bolt connection to ensure the stability of the output shaft during the test. The second shaft end support seat 46 is used to support and fix the output shaft of the test gearbox 2. The second shaft end support seat 46 has the same structure and material as the first shaft end support seat 41, and the sleeve fixing method of the output shaft of the test gearbox 1 is also the same as the first shaft end support seat 41, which ensures the stability of the output shaft during the test. The test output sleeve 42 is connected to the output shaft of the test gearbox 1 by interference fit. The test output sleeve 42 can be made of materials such as carbon steel or aluminum alloy, and is fixed on the output shaft of the gearbox by interference fit. A deep groove ball bearing is arranged in the sleeve to reduce friction and improve the rotation accuracy of the shaft. The torque measuring flange 43 is used to measure the torque of the output shaft. A torque sensor is arranged in the torque measuring flange 43, which can monitor the torque change of the output shaft in real time and transmit it to the PLC controller through an electrical signal. The torque measuring flange 43 can be made of alloy steel or stainless steel to ensure its structural strength and durability. The connection between the torque measuring flange 43 and the output sleeve must be ensured to be firm and reliable to avoid problems such as loosening or separation during the test. The universal shaft 44 is used to connect the test output sleeve 42 and the tested output sleeve 45. The universal shaft 44 can adopt the traditional universal joint form or a new high-precision universal joint to adapt to different types of gearbox output shafts. The two ends of the universal shaft 44 can be fixed to the test output sleeve 42 and the tested output sleeve 45 respectively by bolt connection. The universal shaft 44 needs to have good rigidity and durability to ensure stable operation during the entire test process. The tested output sleeve 45 is connected with the output shaft of the tested gearbox 2 by interference fit. The tested output sleeve 45 can be made of materials such as carbon steel or aluminum alloy, and is fixed on the output shaft of the gearbox by interference fit. The end face of the sleeve is a crown tooth shape, which transmits torque to the universal shaft 44 with crown teeth and is fixed by bolts. In addition, the design of the tested output sleeve 45 needs to ensure the accuracy of its connection with other components to reduce energy loss during the test. Through the cooperation of the output torque transmission device 4, the torque of the output shaft of the test gearbox 1 can be accurately transmitted to the output shaft of the tested gearbox 2, and the torque change of the output shaft can be measured by the torque measurement flange 43.This structural design enables the test device to not only have the ability to transmit torque, but also to provide timely feedback of high-precision torque data, providing an accurate data source for subsequent testing and data processing. In addition, the use of deep groove ball bearings and crown gear design can effectively reduce friction and wear and extend the service life of the device.
[0033] Reference Figure 1 and Figure 4 , the input torque transmission device 5 includes an input shaft sleeve 51, a high-speed bearing box 52, a first flange combination 53, a second flange combination 54 and a third support seat 55. The third support seat 55 is used to fix the high-speed bearing box 52. The input shaft sleeve 51 and the input shaft of the test gearbox 1 are interference fit. The input shaft sleeve 51 can be made of materials such as carbon steel or aluminum alloy, and its dimensional accuracy is ensured by precision machining. In addition, the design of the input shaft sleeve 51 needs to consider the load and torque it bears to ensure its stability during the test. The input shaft sleeve 51 and the input shaft of the tested gearbox 2 are interference fit. The input shaft sleeve 51 can also be made of materials such as carbon steel or aluminum alloy, and its dimensional accuracy is ensured by precision machining. The connection method of the input shaft sleeve 51 to the input shaft of the gearbox is similar to that of the input shaft sleeve 51, ensuring that it is firmly connected. The design of the input shaft sleeve 51 needs to consider the load and torque it bears to ensure its stability during the test. A torque sensor is arranged in the second flange combination 54. The second flange assembly 54 can be made of alloy steel or stainless steel to ensure its structural strength and durability. The torque sensor in the second flange assembly 54 can monitor the torque change of the input shaft in real time, and transmit it to the PLC controller through an electrical signal to achieve precise control of the input torque. Through the design of the input torque transmission device 5, the torque can be transmitted to the tested gearbox 2 through the accompanying test gearbox 1 to achieve a load test on the tested gearbox 2. This structural design not only has the torque transmission capability, but also can accurately monitor the torque change of the input shaft in real time, providing accurate data support for subsequent tests. The torque sensor in the second flange assembly 54 can feedback the torque data in real time, and accurately control the movement of the servo electric cylinder 31 through the PLC controller to ensure the torque stability and accuracy during the entire test process.
[0034] Reference Figure 1 and Figure 5, the drive connection device 7 includes a motor shaft connection flange 71, a drive connection flange 72, a drive shaft sleeve 73 and a second support seat 74. The motor shaft connection flange 71 is used to connect the drive motor 6 and the drive shaft. The motor shaft connection flange 71 can be made of high-strength alloy steel or stainless steel to ensure its structural strength and durability. The motor shaft connection flange 71 and the output shaft of the drive motor 6 can be fixedly connected by a keyway connection or other precision connection methods. The design of the motor shaft connection flange 71 needs to consider the load and torque it bears to ensure its stability during the test. The drive connection flange 72 is used to connect the motor shaft connection flange 71 and the drive shaft sleeve 73. The drive connection flange 72 can be made of high-strength alloy steel or stainless steel to ensure its structural strength and durability. The connection between the drive connection flange 72 and the motor shaft connection flange 71 and the drive shaft sleeve 73 can be achieved by bolt connection or other fastening methods. The design of the drive connection flange 72 needs to consider the load and torque it bears to ensure its stability during the test. The drive shaft sleeve 73 is used to connect the drive connection flange 72 and the accompanying test gearbox 1. The drive sleeve 73 can be made of materials such as carbon steel or aluminum alloy to ensure its structural strength and durability. The connection between the drive sleeve 73 and the drive connection flange 72 can be achieved by bolt connection or other precision connection methods. The design of the drive sleeve 73 needs to take into account the load and torque it bears to ensure its stability during the test. The second support seat 74 is used to fix the drive sleeve 73. The second support seat 74 is generally manufactured by casting to ensure its load-bearing capacity and stability. The second support seat 74 is provided with a hole or groove matching the drive sleeve 73, and the drive sleeve 73 is fixed to the second support seat 74 by bolts or other fasteners to ensure the integrity of the entire drive connection device 7. Through the design of the drive connection device 7, the connection between the drive motor 6 and the accompanying test gearbox 1 can be achieved, and then the driving of the accompanying test gearbox 1 can be achieved.
[0035] The implementation principle of a gearbox loading test device in the embodiment of the present application is as follows: The input end of the test gearbox 1 is pushed to move to the specified position by the motion support device 3 below the input end of the test gearbox 1. Since the output shaft of the test gearbox 1 is stationary, a certain torque will be applied to the input and output gears after the vertical movement of the input shaft, causing the torque to be transmitted to the input torque transmission device 5 and the output torque transmission device 4, and then transmitted to the gears of the tested gearbox 2; the input torque and the output torque are proportional, and the coefficient is the transmission ratio of the gearbox; when the torque sensor in the input torque transmission device 5 collects the torque, it will be transmitted to the PLC controller, and the PLC controller will compare the collected torque with the target torque, further control the movement of the servo electric cylinder 31, and drive the test gearbox 1 to move further through the suspension rod 32 until the target torque is reached.
[0036] The driving motor 6 drives the test gearbox 1 to overcome the torque in the test system through the driving connection device 7; the output end of the test gearbox 1 drives the output shaft of the tested gearbox 2 to move through the test output sleeve 42, the torque measuring flange 43, the universal shaft 44, and the tested output sleeve 45, thereby driving the tested gearbox 2 to perform a running-in test at a specified torque.
[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A gearbox loading test device, characterized in that: The invention comprises a test gearbox (1), a tested gearbox (2), a motion support device (3), an output torque transmission device (4), an input torque transmission device (5), a drive motor (6) and a drive connection device (7), wherein the motion support device (3) is used to support the input end of the test gearbox (1) and drive the input end of the test gearbox (1) to move; the output shaft of the test gearbox (1) is connected to the long shaft of the tested gearbox (2) through the output torque transmission device (4); the input torque transmission device (5) is used to connect the input shaft of the test gearbox (1) and the input shaft of the tested gearbox (2); the drive motor (6) is located on a side of the test gearbox (1) away from the tested gearbox (2), and the drive motor (6) is connected to the tested gearbox (2) through the drive connection device (7).
2. A gearbox loading test device according to claim 1, characterized in that: The accompanying test gearbox (1) is a customized gearbox, and its structure is the same as that of the tested gearbox (2), except that the axle adopts a shortened dummy shaft and the input shaft adopts a reverse direction design.
3. A gearbox loading test device according to claim 1, characterized in that: The motion support device (3) comprises a servo electric cylinder (31), a suspension rod (32) and a first support seat (33); the servo electric cylinder (31) drives the accompanying test gear box (1) to move via the suspension rod (32).
4. A gearbox loading test device according to claim 3, characterized in that: The output torque transmission device (4) comprises a first shaft end support seat (41), a test output shaft sleeve (42), a torque measuring flange (43), a universal shaft (44), a tested output shaft sleeve (45) and a second shaft end support seat (46); the test output shaft sleeve (42) and the tested output shaft sleeve (45) are both interference fit with the axle and have built-in deep groove ball bearings.
5. A gearbox loading test device according to claim 4, characterized in that: The end surface of the tested output shaft sleeve (45) is crown-shaped, and the tested output shaft sleeve (45) and the universal shaft (44) transmit torque via crown teeth and are fixed with bolts; the torque measuring flange (43) is used for synchronously measuring the torque of the output shaft.
6. A gearbox loading test device according to claim 5, characterized in that: The input torque transmission device (5) comprises an input shaft sleeve (51), a high-speed bearing box (52), a first flange assembly (53) and a second flange assembly (54); a torque sensor is provided in the second flange assembly (54) for measuring the input torque and feeding back torque data.
7. A gearbox loading test device according to claim 6, characterized in that: The input shaft sleeve (51) and the input shaft of the companion gearbox (1) are in interference fit, and the input shaft sleeve (51) and the input shaft of the tested gearbox (2) are in interference fit; the first flange assembly (53) and the second flange assembly (54) are connected to the input shaft sleeve (51) by bolts; and a third support seat (55) is provided below the high-speed bearing box (52).
8. A gearbox loading test device according to claim 6, characterized in that: It also includes a PLC controller, and the torque measuring flange (43), the torque sensor and the servo electric cylinder (31) are all electrically connected to the PLC controller.
9. A gearbox loading test device according to claim 1, characterized in that: The drive connection device (7) comprises a motor shaft connection flange (71), a drive connection flange (72), a drive shaft sleeve (73) and a second support seat (74).
10. The gearbox loading test device according to claim 5, characterized in that: The input end of the tested gearbox (2) is provided with an input end support fixture (9), and the input end support fixture (9) is used to support the input end of the tested gearbox (2); the output end of the tested gearbox (2) is provided with an output short shaft side support device (8), and the output short shaft side support device (8) is used to support the output shaft of the tested gearbox (2).