Gearbox no-load loss and function testing device

Abstract

The utility model provides a kind of gearbox assembly testing device and its testing method, the testing device includes tooling table, is provided with fixed frame on tooling table middle part, tooling table is also provided with no-load loss test mechanism, speed sensor, heat dissipation test mechanism, gear shifting test mechanism, oil collector and electric control platform, no-load loss test mechanism is arranged in one end of tooling table, heat dissipation test mechanism is arranged in the side of fixed frame and is communicated with gearbox by pipeline, speed sensor is installed on gearbox, gear shifting test mechanism is arranged in the side of both ends of fixed frame and is connected with clutch and mechanical gear shifting structure of gearbox, oil collector and electric control platform are arranged in the side of tooling table, electric control platform is electrically connected with no-load loss test mechanism, speed sensor, heat dissipation test mechanism, gear shifting test mechanism. The utility model does not need to specially develop multiple testing devices, can also comprehensively test inspection gearbox, and testing efficiency is high and convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of gearbox testing equipment, specifically to a gearbox no-load loss and function 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 transmission no-load loss and function testing device, which can comprehensively and systematically test and inspect the transmission without the need to develop multiple testing devices. The testing is efficient, convenient, and low-cost.

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

[0008] A gearbox no-load loss and function testing device, the testing device includes a tooling table, and a fixing frame for placing the gearbox to be tested is provided in the middle of the tooling table. The tooling table is characterized by further being provided with a no-load loss testing mechanism, a heat dissipation testing mechanism, a shift testing mechanism, an oil receiver, a speed sensor and an electronic control table.

[0009] The no-load loss 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 heat dissipation testing mechanism is set on one side of the fixed frame and is connected to the gearbox through a pipe. It is used for internal heat dissipation of the gearbox and to test the heat dissipation performance of the gearbox. The speed sensor is installed on the gearbox and electrically connected to the electronic control panel. It is used to detect the output power of the gearbox output shaft.

[0010] 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.

[0011] 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 no-load loss testing mechanism, the speed sensor, the heat dissipation testing mechanism, and the shift testing mechanism. It is used to collect test data to determine whether the gearbox is qualified and to control the gearbox during testing.

[0012] 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 line. It is used to control the gearbox and process and judge the test data information of the gearbox.

[0013] The connector is located on the side of the electronic control bench and is connected to the no-load loss test mechanism, heat dissipation test mechanism, shift test mechanism, steering test mechanism, gearbox monitoring component, and gearbox via wiring. 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.

[0014] 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.

[0015] 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.

[0016] Preferably, the no-load loss 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 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.

[0022] 2. By testing the no-load loss of the gearbox through a no-load loss testing organization, the disadvantages of long platform construction cycle, high cost and poor adaptability to multiple categories under load are avoided. In the product development process, the product can be quickly assessed with preliminary data to determine the product status and problem points.

[0023] 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, and the normality of the shift status can be determined.

[0024] 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.

[0025] 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

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the tooling table structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the internal structure of the electrical control console of this utility model;

[0029] Figure 4 This is a schematic diagram of the steering test mechanism of this utility model;

[0030] Figure 5 This is a schematic diagram of the testing method of this utility model. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Please see Figure 1 and Figure 2 As shown, a gearbox assembly testing device includes a tooling table 1, a mounting bracket 2 for placing the gearbox to be tested is provided in the middle of the tooling table 1, and the tooling table 1 is also provided with an no-load loss testing mechanism 3, a speed sensor 4, a heat dissipation testing mechanism 5, a shift testing mechanism 7, an oil receiver 6, and an electronic control panel 8.

[0035] The no-load loss 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 speed sensor 4 is installed on the gearbox to detect the output power of the gearbox output shaft. The speed sensor 4 can be the gearbox's own speed sensor, which is electrically connected to the electronic control panel 8 to detect the speed, or the speed sensor 4 can be set separately. It is preferred to use the gearbox's own speed sensor 4.

[0036] The no-load loss 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 set on the tooling table 1, the drive motor 32 is set 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 input shaft of the gearbox to drive the gearbox to operate.

[0037] 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.

[0038] During the no-load loss test of the gearbox, the drive motor 32 drives the gearbox to work, and the input torque sensor 34 transmits the speed and torque data of the gearbox input shaft to the electronic control panel 8. The data processing terminal 84 of the electronic control panel 8 determines the power of the input end under no-load conditions based on the test data, compares the no-load power loss with the set value, and then confirms whether the overall condition of the gearbox is normal. When there are problems such as improper assembly, unqualified hydraulic oil viscosity, or other issues inside the gearbox, the no-load loss will show abnormalities.

[0039] The heat dissipation testing mechanism 5 is set on one side of the fixed frame 2 and connected to the gearbox through a pipe. It is used for heat dissipation inside the gearbox and to test the heat dissipation performance of the gearbox. The heat dissipation testing mechanism 5 includes a radiator 51 and a heat pump 52. The radiator 51 is set on the tooling table 1, and the heat pump 52 is located next to the radiator 51 and is connected to the output loader 42 and the radiator 51 through a pipe.

[0040] The radiator 51 has an internal flow path for cooling the hydraulic oil inside the transmission. The transmission hydraulic oil flows through the radiator 51 under the action of the hydraulic pump, and after cooling, flows back into the transmission. Alternatively, the transmission's own hydraulic pump can provide power to the hydraulic oil, causing it to flow through the radiator 51 and then back into the transmission.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] During hydraulic shift 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 different gears are operating. When performing shift 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 is monitored by the pressure sensor 831 and the output shaft speed of the gearbox is monitored by the speed sensor 4. By determining whether the set value is met, the state of the gearbox is judged to be qualified.

[0045] The oil receiver 6 and the electronic control console 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 console 8 is electrically connected to the no-load loss testing mechanism 3, the speed sensor 4, the heat dissipation testing mechanism 5, and the shifting testing mechanism 7. It is used to collect test data to determine whether the gearbox is qualified and to control the gearbox during testing.

[0046] Please see Figure 3 and Figure 4As 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 at 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 at the other end of the electronic control frame 81 and is connected to the connector 85 via wiring. 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 no-load loss test mechanism 3, the speed sensor 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 wiring. 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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:

[0051] A. The drive motor 32 drives the gearbox to work. The input torque sensor 34 transmits the speed and torque data of the gearbox input shaft to the electronic control panel 8. The data processing terminal 84 of the electronic control panel 8 determines the power of the input end under no-load conditions based on the test data, compares the no-load power loss with the set value, and then confirms whether the overall condition of the gearbox is normal. When there are problems such as improper assembly, unqualified hydraulic oil viscosity, or other issues inside the gearbox, the no-load loss will show abnormalities. In addition, combined with the gearbox's own transmission route, the load-related losses are theoretically calculated, and combined with the no-load loss, the transmission efficiency under load is deduced. This provides some reference, and the system investment cost and cycle are low.

[0052] B. Hydraulic shift test: When performing the shift function test, the data processing terminal selects the working gear on the gearbox and sends a control signal to the corresponding shift valve body on the gearbox to control the corresponding shift valve body to work. The pressure sensor 831 monitors the hydraulic pressure of the gearbox clutch and the speed sensor 4 detects the speed of the gearbox output shaft. The gearbox status is determined by whether the hydraulic pressure data and the output shaft speed data meet the set values.

[0053] 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.

[0054] D. Steering test: Select the steering mode, the data processing terminal 84 confirms the working current of the proportional valve of the gearbox, 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 speed sensor 4. 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.

[0055] 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.

[0056] 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, and controls 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 speed sensor 4. 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.

[0057] 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 speed sensor 4. 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] 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.

[0059] 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 no-load loss testing mechanism 3 tests the transmission's no-load loss, avoiding the drawbacks of long platform setup cycles, high costs, and poor adaptability to various product types under load. During product development, it allows for rapid preliminary data analysis to determine product status and potential issues. The electronic control console 8 controls the transmission's hydraulic shift valve body and shift testing mechanism 7 to monitor shift smoothness and pressure status, determining whether the shifting is satisfactory. Normal; the steering test mechanism 82 of the electronic control console 8 simulates the control of the hydraulic differential clutch during its overall operation, and monitors the actual current and pressure of the proportional valve to detect whether the hydraulic differential clutch is operating normally; the heat dissipation test mechanism 5 tests the heat dissipation capacity of the gearbox, and the temperature sensor 832 monitors the gearbox oil temperature to obtain the heat dissipation requirement when the oil temperature reaches a certain level, providing parameters for matching the radiator to the whole machine; under a certain heat dissipation condition, the oil temperature inside the gearbox is monitored to determine whether the oil temperature is normal, thereby analyzing whether the internal components are operating normally.

[0060] 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 testing device for the no-load loss and function of a transmission, the testing device comprising a tooling table, wherein a fixing frame for placing the transmission to be tested is provided in the middle of the tooling table, characterized in that, The tooling platform is also equipped with an unloaded loss testing mechanism, a heat dissipation testing mechanism, a gear shifting testing mechanism, an oil catcher, a speed sensor, and an electronic control console. The no-load loss 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 heat dissipation testing mechanism is set on one side of the fixed frame and is connected to the gearbox through a pipe. It is used for internal heat dissipation of the gearbox and to test the heat dissipation performance of the gearbox. The speed sensor is installed on the gearbox and electrically connected to the electronic control panel. It is used to detect the output power of the gearbox output shaft. 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 no-load loss testing mechanism, the speed sensor, the heat dissipation testing mechanism, and the shift 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 no-load loss and function 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 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 no-load loss test mechanism, heat dissipation test mechanism, shift test mechanism, steering test mechanism, gearbox monitoring component, and gearbox via wiring. 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 no-load loss and function 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 no-load loss and function 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 no-load loss and function testing device according to claim 1, characterized in that, The no-load loss 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, one end of the input coupling is connected to the drive motor, and 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 no-load loss and function testing device according to claim 1, 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 radiator through a pipe.

7. The gearbox no-load loss and function 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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