A transmission assembly test device

Abstract

The utility model provides a gearbox assembly testing arrangement, and the testing arrangement includes the tooling station, is provided with the fixing frame on the middle part of tooling station, still is provided with input test mechanism, output test mechanism, heat dissipation test mechanism, gear shifting test mechanism, oil collector and electric control platform on tooling station, input test mechanism sets up in one end of tooling station, output test mechanism is set up in the other end of tooling station and is distributed in the shape of Chinese character pin, heat dissipation test mechanism sets up in the side of output test mechanism and is connected with output test mechanism, gearbox through pipeline, gear shifting test mechanism sets up in the both ends of fixing frame and is connected with the clutch and mechanical gear shifting structure of gearbox, oil collector and electric control platform set up in the side of tooling station, and electric control platform is electrically connected with input test mechanism, output test mechanism, heat dissipation test mechanism, gear shifting test mechanism. The utility model need not specially develop multiple testing arrangements, and can also test and check gearbox comprehensively, and the testing efficiency is high and convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of transmission testing equipment, specifically to a transmission assembly testing device. Background Technology

[0002] As the core component for power transmission in a machine, the transmission's reliability, lifespan, and efficiency have a decisive impact on the overall performance, reliability, and efficiency of the machine. Furthermore, the transmission is a priority assembly component during the overall assembly process, and its location within the machine's space is limited. Repairing it requires disassembling numerous other parts, resulting in significant rework time and costs.

[0003] If problems are discovered outside the factory, the equipment typically needs to be transported in-house for disassembly and repair, further increasing repair time and costs, and severely impacting brand image. Therefore, better early detection and handling of transmission problems, preventing defective products from progressing to the next stage, and improving transmission reliability significantly impacts production efficiency, transmission and overall machine maintenance costs, overall machine reliability, and brand image.

[0004] Tractor gearboxes, especially power shift hydraulic differential gearboxes, have complex structures, including not only mechanical transmission parts but also hydraulic transmission and electrical control parts. Therefore, tractor gearbox testing platforms need to verify the reliability of their mechanical transmission parts and monitor their internal hydraulic and control status to ensure their functional and quality reliability.

[0005] For testing the transmission efficiency and reliability of gearboxes, the current common approach is to apply load to the output end and confirm the results by testing the power at both the input and output ends. For functional testing of gearboxes, the common approach is to design dedicated testing devices for different functions. This makes the entire gearbox testing process complex, requiring multiple testing devices to complete the overall test, resulting in low testing efficiency, inconvenience, and high development costs for the testing devices. Utility Model Content

[0006] This invention provides a gearbox assembly testing device that eliminates the need for developing multiple specialized testing devices, enabling comprehensive and systematic testing and inspection of the gearbox. The testing is efficient, convenient, and cost-effective.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A gearbox assembly testing device includes a tooling table, a fixing frame for placing the gearbox to be tested is provided in the middle of the tooling table, and an input testing mechanism, an output testing mechanism, a heat dissipation testing mechanism, a shifting testing mechanism, an oil receiver and an electronic control table are also provided on the tooling table.

[0009] The input testing mechanism is set at one end of the tooling table and is used to provide the gearbox with operating power and test its input power. The output testing mechanism is arranged in a triangular pattern and is movably set at the other end of the tooling table and is used to increase the load on the gearbox and test its output power.

[0010] The heat dissipation testing mechanism is located on one side of the output testing mechanism and is connected to the output testing mechanism and the gearbox through a pipe. It is used to dissipate heat from the output testing mechanism and the inside of the gearbox, and to test the heat dissipation performance of the gearbox.

[0011] The shift test mechanism is set at both ends of the fixed frame and connected to the clutch and mechanical shift structure of the gearbox. It is used to control the operation of the clutch and mechanical shift structure of the gearbox and to test the shift smoothness of the gearbox.

[0012] The oil receiver and the electronic control unit are both located on the side of the tooling table. The oil receiver is used to supply hydraulic oil to the gearbox before testing and to collect and store the hydraulic oil after testing. The electronic control unit is electrically connected to the input testing mechanism, output testing mechanism, heat dissipation testing mechanism, and shifting testing mechanism. It is used to collect test data to determine whether the gearbox is qualified and to control the gearbox during testing.

[0013] Preferably, the electronic control console includes an electronic control console frame, a steering test mechanism, a gearbox monitoring component, a data processing terminal, a connector, and control buttons. The steering test mechanism is installed on one end of the electronic control console frame and is used to test the steering performance of the gearbox. The data processing terminal is installed in the other end of the electronic control console frame and is connected to the connector via a communication line. It is used to control the gearbox and process and judge the test data information of the gearbox.

[0014] The connector is located on the side of the electronic control bench and is connected to the input test mechanism, output test mechanism, heat dissipation test mechanism, shift test mechanism, steering test mechanism, gearbox monitoring component, and gearbox via a communication line. The gearbox monitoring component is installed on the gearbox to monitor the hydraulic pressure and oil temperature inside the gearbox. The control button is located on the upper surface of the electronic control bench and is used to control the switching operation of each mechanism.

[0015] Preferably, the steering test mechanism includes a support frame, a steering wheel assembly, and an angle sensor. The support frame is installed inside the electronic control panel. One end of the steering wheel assembly is mounted on the support frame, and the other end extends to the outer surface of the electronic control panel. The angle sensor is mounted on the shaft of the steering wheel assembly and is used to transmit the angle information of the steering wheel assembly rotation to the data processing terminal.

[0016] Preferably, the transmission monitoring component includes a pressure sensor and a temperature sensor for mounting on the transmission. The pressure sensor transmits the hydraulic pressure data of the transmission to a data processing terminal, and the temperature sensor transmits the hydraulic oil temperature data of the transmission to the data processing terminal.

[0017] Preferably, the input testing mechanism includes an input support base, a drive motor, an input coupling, an input torque sensor, a motor frequency converter, and a protective cover assembly. The input support base is mounted on a tooling table, the drive motor is mounted on the input support base, and one end of the input coupling is connected to the drive motor, while the other end can be connected to the gearbox input shaft to drive the gearbox to operate.

[0018] The input torque sensor is mounted on the input coupling to detect the dynamic torque, speed, and power information at the input end and transmit the information to the control panel. The motor frequency converter is mounted on the tooling table and electrically connected to the drive motor to control and adjust the operation of the drive motor. The protective cover assembly is movably mounted on the tooling table to cover the drive motor.

[0019] Preferably, the output testing mechanism includes an output support base, an output loader, an output coupling, and an output torque sensor. The output support base is mounted on a tooling table, the output loader is mounted on the output support base, one end of the output coupling is connected to the output loader, and the other end can be connected to the output end of the gearbox. The output torque sensor is mounted on the output coupling and is used to detect the dynamic torque, speed, and power information of the output end and transmit the information to the electronic control console.

[0020] Preferably, the heat dissipation testing mechanism includes a radiator and a heat pump. The radiator is mounted on a tooling table, and the heat pump is located next to the radiator and is connected to the output loader and the radiator through a pipe.

[0021] Preferably, the shift test mechanism includes a shift support, a shift electric actuator, and a shift torque sensor. The shift support is symmetrically arranged on the tooling table, the shift electric actuator is mounted on the shift support and is used to control the clutch and shift lever of the gearbox, and the shift torque sensor is mounted on the shift electric actuator and is used to collect the torque of the clutch and shift lever during shifting and transmit it to the electronic control panel.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. It can comprehensively and systematically test and inspect the transmission without the need to develop multiple testing devices, making the testing efficient, convenient, and cost-effective.

[0024] 2. By using input and output testing mechanisms, the working efficiency of the transmission can be tested, and the status of the transmission can be monitored and judged.

[0025] 3. By controlling the hydraulic shift valve body and shift test mechanism of the transmission through the electronic control console, the smoothness and pressure status of the transmission shift can be monitored to determine whether the shift status is normal;

[0026] 4. By using the steering test mechanism on the electronic control console, the control of the hydraulic differential clutch during its overall operation is simulated, and the actual current and pressure of the proportional valve are monitored to check whether the hydraulic differential clutch is operating normally.

[0027] 5. The heat dissipation capacity of the transmission is tested through a heat dissipation testing mechanism, and the transmission oil temperature is monitored through a temperature sensor to obtain the heat dissipation requirement when the oil temperature reaches a certain state. This provides parameters for matching the radiator to the whole machine. Under a certain heat dissipation state, the transmission oil temperature is monitored to determine whether the oil temperature state is normal, thereby analyzing whether the internal components are working properly. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of the electrical control console of this utility model;

[0031] Figure 4 This is a schematic diagram of the steering test mechanism of this utility model;

[0032] Figure 5 This is a schematic diagram of the testing method of this utility model. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0034] It should be noted that when a component / part is referred to as being "set on" another component / part, it can be directly set on the other component / part or there may be an intervening component / part. When a component / part is referred to as being "connected / linked" to another component / part, it can be directly connected / linked to the other component / part or there may be an intervening component / part. The term "connected / linked" as used herein can include electrical and / or mechanical physical connections / links. The term "including / comprises" as used herein means the presence of a feature, step, or component / part, but does not exclude the presence or addition of one or more other features, steps, or components / parts. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0036] Please see Figure 1 and Figure 2 As shown, a gearbox assembly testing device includes a tooling table 1, a mounting frame 2 for placing the gearbox to be tested is provided in the middle of the tooling table 1, and an input testing mechanism 3, an output testing mechanism 4, a heat dissipation testing mechanism 5, a shifting testing mechanism 7, an oil receiver 6 and an electronic control panel 8 are also provided on the tooling table 1.

[0037] The input test mechanism 3 is set at one end of the tooling table 1 to provide power to the gearbox and test its input power. The output test mechanism 4 is arranged in a triangular pattern and is movably set at the other end of the tooling table 1 to increase the load on the gearbox and test its output power. A slide rail assembly can be set under the output test mechanism 4.

[0038] The input testing mechanism 3 includes an input support base 31, a drive motor 32, an input coupling 33, an input torque sensor 34, a motor frequency converter 35, and a protective cover assembly 36. The input support base 31 is mounted on the tooling table 1, the drive motor 32 is mounted on the input support base 31, one end of the input coupling 33 is connected to the drive motor 32, and the other end can be connected to the gearbox input shaft to drive the gearbox to operate.

[0039] The input torque sensor 34 is mounted on the input coupling 33 to detect the dynamic torque, speed and power information at the input end and transmit the information to the control console 8. The motor frequency converter 35 is mounted on the tooling table 1 and electrically connected to the drive motor 32 to control and adjust the operation of the drive motor 32. The protective cover assembly 36 is mounted on the tooling table 1 and is used to cover the drive motor 32.

[0040] The output testing mechanism 4 includes an output support base 41, an output loader 42, an output coupling 43, and an output torque sensor 44. The output support base 41 is mounted on the tooling table 1 and can be slidably mounted along the slide rail or fixedly mounted. The output loader 42 is mounted on the output support base 41 and is a magnetic powder brake. One end of the output coupling 43 is connected to the output loader 42, and the other end can be connected to the output end of the gearbox. The output torque sensor 44 is mounted on the output coupling 43 and is used to detect the dynamic torque, speed, and power information of the output end and transmit the information to the electronic control console 8.

[0041] During the efficiency performance test of the gearbox, the drive motor 32 drives the gearbox to work, the output loader 42 loads the output end of the gearbox, and the input torque sensor 34 and the output torque sensor 44 transmit the speed and torque data of the gearbox input shaft and output shaft to the data processing terminal 84 of the electronic control console 8. The data processing terminal 84 determines the power of the input and output ends based on the test signal data, and then confirms the ratio of the output power to the input power of the gearbox. At the same time, it compares the measured transmission efficiency with the set range to confirm the working status of the gearbox.

[0042] The heat dissipation test mechanism 5 is located on one side of the output test mechanism 4 and is connected to the output test mechanism 4 and the gearbox through a pipe. It is used to dissipate heat from the output test mechanism 4 and the inside of the gearbox and to test the heat dissipation performance of the gearbox. The heat dissipation test mechanism 5 includes a radiator 51 and a heat pump 52. The radiator 51 is located on the tooling table 1, and the heat pump 52 is located on one side of the radiator 51 and is connected to the output loader 42 and the radiator 51 through a pipe.

[0043] The radiator 51 has two flow paths: one flow path is used to dissipate heat from the output loading module 42. The liquid in the heat dissipation flow path inside the output loading module 42 flows into the radiator 51 through the cooling pump 52, and after being cooled by the radiator 51, it flows back into the output loading module 42. The other flow path is used to dissipate heat from the hydraulic oil inside the gearbox. The gearbox hydraulic oil flows through the radiator 51 under the action of the hydraulic pump, and after being cooled, it flows back into the gearbox.

[0044] There are two working modes for heat dissipation testing: one is used for initial data analysis of new products to test heat dissipation requirements and confirm the heat dissipation capacity required for normal operation of the transmission system. In this mode, the speed of radiator 51 and the transmission oil temperature are monitored. When the oil temperature is higher than the set range, the speed of radiator 51 is increased; when the oil temperature is lower than the set range, the speed of radiator 51 is decreased. When the oil temperature remains within the set range, the speed of radiator 51 is confirmed. Based on the speed of the cooling fan, the size and heat dissipation characteristics of radiator 51 are used to confirm the required heat dissipation capacity of the transmission. The other mode is the internal heat generation judgment mode of the transmission, used to confirm whether there is abnormal heat generation inside the transmission, thereby determining whether the transmission is in normal condition. In this mode, the speed of radiator 51 is kept constant, and the oil temperature is monitored by temperature sensor 832 and compared with the set value to determine whether the oil temperature is within the set range, thereby determining whether the transmission is in good condition.

[0045] The shift test mechanism 7 is set at both ends of the fixed frame 2 and connected to the clutch and mechanical shift structure of the gearbox. It is used to control the operation of the clutch and mechanical shift structure of the gearbox and to test the shift smoothness of the gearbox. The shift test mechanism 7 includes a shift support 71, a shift electric push rod 72 and a shift torque sensor 73. The shift support 71 is symmetrically arranged on the tooling table 1. The shift electric push rod 72 is set on the shift support 71 and is used to control the clutch and shift lever of the gearbox. The shift torque sensor 73 is set on the shift electric push rod 72 and is used to collect the torque of the clutch and shift lever during shifting and transmit it to the electronic control panel 8.

[0046] The shift test is divided into mechanical shift part test and hydraulic shift test. During the mechanical shift part test, the control signal of the electronic control panel 8 controls the shift electric push rod 72 to work. The shift torque sensor 73 records the torque at this time and transmits the data to the data processing terminal 84 of the electronic control panel 8. The data processing terminal 84 judges whether the operating torque meets the set value range, thereby determining whether the status of the main clutch and mechanical shift part of the gearbox is normal.

[0047] During hydraulic shifting testing, the gearbox body has shift valves used to control the gearbox's operating gears. The electronic control unit 8 controls the corresponding gear to operate by sending signals to the valve bodies of different gears. When a corresponding gear needs to operate, an electronic control signal is sent to the corresponding shift valve to achieve the operation of the corresponding gear. The pressure sensor 831 is connected to the gearbox shift valve and can detect the hydraulic pressure at the valve body when operating in different gears. When performing shifting function testing, the electronic control unit 8 selects the operating gear and sends a control signal to the corresponding gear valve body to control the operation of the corresponding valve body. At this time, the hydraulic pressure and output shaft speed are monitored, and the gearbox status is judged as qualified by determining whether the set values ​​are met.

[0048] The oil receiver 6 and the electronic control unit 8 are both located on the side of the tooling table 1. The oil receiver 6 is used to supply hydraulic oil to the gearbox before testing and to collect and store the hydraulic oil after testing. The electronic control unit 8 is electrically connected to the input test mechanism 3, the output test mechanism 4, the heat dissipation test mechanism 5, and the shift test mechanism 7. It is used to collect test data to determine whether the gearbox is qualified and to control the gearbox during testing.

[0049] Please see Figure 3 and Figure 4 As shown, the electronic control console 8 includes an electronic control frame 81, a steering test mechanism 82, a gearbox monitoring component 83, a data processing terminal 84, a connector 85, and control buttons 86. The steering test mechanism 82 is located on one end of the electronic control frame 81 and is used to test the steering performance of the gearbox. The data processing terminal 84 is located inside the other end of the electronic control frame 81 and is connected to the connector 85 via a communication line. It is used to control the gearbox and process and judge the test data information of the gearbox. The connector 85 is located on the side of the electronic control frame 81 and is connected to the input test mechanism 3, the output test mechanism 4, the heat dissipation test mechanism 5, the shift test mechanism 7, the steering test mechanism 82, the gearbox monitoring component 83, and the gearbox via a communication line. The gearbox monitoring component 83 is installed on the gearbox to monitor the hydraulic pressure and oil temperature inside the gearbox. The control buttons 86 are located on the upper surface of the electronic control frame 81 and are used to control the switching operation of each mechanism.

[0050] The transmission monitoring component 83 includes a pressure sensor 831 and a temperature sensor 832 for mounting on the transmission. The pressure sensor 831 transmits the hydraulic pressure data of the transmission to a data processing terminal, and the temperature sensor 832 transmits the hydraulic oil temperature data of the transmission to a data processing terminal 84.

[0051] The steering test mechanism 82 includes a support frame 821, a steering wheel assembly 822, and an angle sensor 823. The support frame 821 is located inside the electronic control panel 81. One end of the steering wheel assembly 822 is mounted on the support frame 821, and the other end extends to the outer surface of the electronic control panel 81. The angle sensor 823 is mounted on the shaft of the steering wheel assembly 822 and is used to transmit the angle information of the steering wheel assembly 822 to the data processing terminal 84. The steering wheel assembly 822 includes a rotating shaft and a steering wheel, etc.

[0052] During the steering test, the steering wheel assembly 822 is rotated to drive the angle sensor 823, thereby confirming the steering wheel rotation angle. The data processing terminal 84 controls the current through the proportional valve according to the steering wheel rotation angle via PWM, thereby controlling the hydraulic pressure at the clutch, and then controlling the output shaft speed and steering. An auxiliary current detector can also be used on the line to detect the actual current through the proportional valve. The pressure sensor 831 is connected to the clutch to detect the working pressure at the clutch. By determining the actual current of the proportional valve, the output shaft speed, and the hydraulic pressure at the clutch, the normal working status of the clutch is determined.

[0053] Please see Figure 5 As shown, a test method for a transmission assembly test device is also disclosed. Based on the test device, the test method includes the following steps:

[0054] A. Efficiency Test: The transmission is driven by the drive motor 32, and the output loader 42 loads the output end of the transmission. The input torque sensor 34 and the output torque sensor 44 transmit the speed and torque data of the input and output shafts of the transmission to the electronic control console 8. The data processing terminal 84 of the electronic control console 8 determines the power of the input and output ends based on the test data, thereby confirming the transmission efficiency of the transmission. At the same time, the measured transmission efficiency is compared with the set range to confirm the working status of the transmission.

[0055] B. Hydraulic shift test: When performing the shift function test, the data processing terminal 84 selects the working gear on the gearbox, sends a control signal to the corresponding shift valve body on the gearbox, controls the corresponding shift valve body to work, monitors the hydraulic pressure through the pressure sensor 831 and monitors the output shaft speed in step A at the same time, and judges whether the gearbox status is qualified by determining whether the set value is met.

[0056] C. Mechanical shift test: During the test, the data processing terminal 84 controls the shift electric push rod 72 to work with the control signal. The shift torque sensor 73 records the torque at this time and transmits the data information to the data processing terminal 84. The data processing terminal 84 judges whether the operating torque meets the set value range, thereby determining whether the state of the main clutch and mechanical shift part of the gearbox is normal.

[0057] D. Steering test: Select the steering mode, the data processing terminal 84 confirms the working current of the proportional valve of the transmission, and controls the adjustment of the working current of the proportional valve through PWM. Then, it detects the actual working current of the proportional valve, the hydraulic pressure of the clutch detected by the pressure sensor 831, and the output shaft speed detected by the output torque sensor 44. Based on whether the data relationship of the three is matched, it determines whether the differential steering function, i.e. the working state of the clutch, is normal.

[0058] E. Heat dissipation test: Select the working mode, the data processing terminal 84 controls the operating speed of the radiator 51, and monitors the temperature of the hydraulic oil inside the transmission through the temperature sensor 832. Based on the comparison of the temperature with the set value, it is determined whether the oil temperature is within the set range, thereby determining whether the transmission is in good condition.

[0059] In step D, there are two steering modes: manual steering mode and automatic steering mode. If manual steering mode is selected, the direction rotation angle data is transmitted to the data processing terminal 84 through the angle sensor 823. The data processing terminal 84 determines the working current of the gearbox proportional valve based on the angle data, controls the working current of the proportional valve through PWM, and then detects the actual working current of the proportional valve, the hydraulic pressure of the clutch detected by the pressure sensor 831, and the output shaft speed detected by the output torque sensor 44. Based on whether the data relationship of the three is matched, it determines whether the differential steering function, i.e. the working state of the clutch, is normal.

[0060] If the automatic steering mode is selected, the data processing terminal 84 directly controls the gearbox proportional valve current to increase linearly from 0 to the maximum working current through PWM. Then, it detects the actual working current of the proportional valve, the hydraulic pressure of the clutch detected by the pressure sensor 831, and the output shaft speed detected by the output torque sensor 44. Based on whether the data relationship of the three is matched, it determines whether the differential steering function, i.e. the working state of the clutch, is normal.

[0061] There are two working modes in step E: First, the rotational speed of the radiator 51 and the temperature of the transmission hydraulic oil are monitored. When the oil temperature is higher than the set range, the rotational speed of the radiator 51 is increased; when the oil temperature is lower than the set range, the rotational speed of the radiator 51 is decreased. When the oil temperature remains within the set range, the required cooling capacity of the transmission is determined based on the rotational speed of the radiator 51, its size, and its heat dissipation characteristics. Second, the rotational speed of the radiator 51 is kept constant. The temperature of the transmission hydraulic oil is monitored and compared with the set value to determine whether the oil temperature is within the set range, thereby determining whether the transmission is in good condition.

[0062] This invention eliminates the need for developing multiple specialized testing devices, enabling comprehensive and systematic testing and inspection of the transmission. It boasts high testing efficiency, convenience, and low cost. The input testing mechanism 3 and output testing mechanism 4 enable testing of the transmission's operating efficiency and monitoring and assessment of its status. The electronic control console 8 controls the transmission's hydraulic shift valve body and shift testing mechanism 7 to monitor shift smoothness and pressure, determining if the shifting status is normal. The steering testing mechanism 82 on the electronic control console 8 simulates the control of the hydraulic differential clutch during its overall operation, monitoring the actual current and pressure of the proportional valve to detect if the hydraulic differential clutch is functioning correctly. The cooling testing mechanism 5 controls the transmission's cooling capacity, and the temperature sensor 832 monitors the transmission oil temperature to obtain the required cooling capacity when the oil temperature reaches a certain level, providing parameters for matching the radiator. Under certain cooling conditions, the transmission oil temperature is monitored to determine if it is normal, thereby analyzing the operational status of internal components.

[0063] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gearbox assembly testing device, the testing device comprising a tooling table, wherein a fixing frame for placing the gearbox to be tested is disposed in the center of the tooling table, characterized in that, The tooling platform is also equipped with an input testing mechanism, an output testing mechanism, a heat dissipation testing mechanism, a gear shifting testing mechanism, an oil catcher, and an electrical control console. The input testing mechanism is set at one end of the tooling table and is used to provide the gearbox with operating power and test its input power. The output testing mechanism is arranged in a triangular pattern and is movably set at the other end of the tooling table and is used to increase the load on the gearbox and test its output power. The heat dissipation testing mechanism is located on one side of the output testing mechanism and is connected to the output testing mechanism and the gearbox through a pipe. It is used to dissipate heat from the output testing mechanism and the inside of the gearbox, and to test the heat dissipation performance of the gearbox. The shift test mechanism is set at both ends of the fixed frame and connected to the clutch and mechanical shift structure of the gearbox. It is used to control the operation of the clutch and mechanical shift structure of the gearbox and to test the shift smoothness of the gearbox. The oil receiver and the electronic control unit are both located on the side of the tooling table. The oil receiver is used to supply hydraulic oil to the gearbox before testing and to collect and store the hydraulic oil after testing. The electronic control unit is electrically connected to the input testing mechanism, output testing mechanism, heat dissipation testing mechanism, and shifting testing mechanism. It is used to collect test data to determine whether the gearbox is qualified and to control the gearbox during testing.

2. The gearbox assembly testing device according to claim 1, characterized in that, The electronic control console includes an electronic control console frame, a steering test mechanism, a gearbox monitoring component, a data processing terminal, a connector, and control buttons. The steering test mechanism is set on one end of the electronic control console frame and is used to test the steering performance of the gearbox. The data processing terminal is set in the other end of the electronic control console frame and is connected to the connector via a communication line. It is used to control the gearbox and process and judge the test data information of the gearbox. The connector is located on the side of the electronic control bench and is connected to the input test mechanism, output test mechanism, heat dissipation test mechanism, shift test mechanism, steering test mechanism, gearbox monitoring component, and gearbox via a communication line. The gearbox monitoring component is installed on the gearbox to monitor the hydraulic pressure, oil temperature, and shift torque inside the gearbox. The control buttons are located on the upper surface of the electronic control bench and are used to control the switching operation of each mechanism.

3. The gearbox assembly testing device according to claim 2, characterized in that, The steering test mechanism includes a support frame, a steering wheel assembly, and an angle sensor. The support frame is located inside the electronic control panel. One end of the steering wheel assembly is mounted on the support frame, and the other end extends to the outer surface of the electronic control panel. The angle sensor is mounted on the shaft of the steering wheel assembly and is used to transmit the angle information of the steering wheel assembly rotation to the data processing terminal.

4. The gearbox assembly testing device according to claim 2, characterized in that, The transmission monitoring component includes a pressure sensor and a temperature sensor for mounting on the transmission. The pressure sensor transmits the hydraulic pressure data of the transmission to a data processing terminal, and the temperature sensor transmits the hydraulic oil temperature data of the transmission to the data processing terminal.

5. The gearbox assembly testing device according to claim 1, characterized in that, The input testing mechanism includes an input support base, a drive motor, an input coupling, an input torque sensor, a motor frequency converter, and a protective cover assembly. The input support base is set on a tooling table, the drive motor is set on the input support base, and one end of the input coupling is connected to the drive motor, while the other end can be connected to the gearbox input shaft to drive the gearbox to operate. The input torque sensor is mounted on the input coupling to detect the dynamic torque, speed, and power information at the input end and transmit the information to the control panel. The motor frequency converter is mounted on the tooling table and electrically connected to the drive motor to control and adjust the operation of the drive motor. The protective cover assembly is movably mounted on the tooling table to cover the drive motor.

6. The gearbox assembly testing device according to claim 1, characterized in that, The output testing mechanism includes an output support base, an output loader, an output coupling, and an output torque sensor. The output support base is mounted on a tooling table, the output loader is mounted on the output support base, one end of the output coupling is connected to the output loader, and the other end can be connected to the output end of the gearbox. The output torque sensor is mounted on the output coupling and is used to detect the dynamic torque, speed, and power information of the output end and transmit the information to the electronic control console.

7. The gearbox assembly testing apparatus according to claim 6, characterized in that, The heat dissipation testing mechanism includes a radiator and a heat pump. The radiator is set on a tooling table, and the heat pump is located next to the radiator and is connected to the output loader and the radiator through a pipe.

8. The gearbox assembly testing device according to claim 1, characterized in that, The shift test mechanism includes a shift support, a shift electric actuator, and a shift torque sensor. The shift support is symmetrically arranged on the tooling table. The shift electric actuator is mounted on the shift support and is used to control the clutch and shift lever of the gearbox. The shift torque sensor is mounted on the shift electric actuator and is used to collect the torque of the clutch and shift lever during shifting and transmit it to the electronic control panel.

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