Gearbox assembly testing device and testing method thereof
The transmission assembly testing device, which integrates input, output, heat dissipation, and shift testing mechanisms, solves the problems of low testing efficiency and high cost in existing technologies, and realizes systematic, efficient, and convenient testing and condition monitoring of transmissions.
Patent Information
- Application Number
- CN202511880196.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-02-13
AI Technical Summary
In existing technologies, gearbox testing requires multiple devices to complete, resulting in low testing efficiency and high costs. It also fails to comprehensively monitor the mechanical transmission, hydraulic and control status, leading to difficult and costly disassembly and repair.
Design a transmission assembly testing device that integrates an input testing mechanism, an output testing mechanism, a heat dissipation testing mechanism, a shift testing mechanism, an oil receiver, and an electronic control console. The electronic control console controls each mechanism to achieve systematic testing of the transmission, including monitoring of efficiency, shift smoothness, hydraulic status, and heat dissipation capacity.
It enables comprehensive testing of transmissions without the need for multiple testing devices, improving testing efficiency, reducing costs, and accurately monitoring the operating status of the transmission to ensure its functional and quality reliability.
Smart Images
Figure CN121521467A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of gearbox testing equipment, in particular to a gearbox assembly testing device and a testing method thereof. BACKGROUND
[0002] As the core component of power transmission of the whole machine, the reliability, service life and efficiency of the gearbox have a decisive influence on the performance, reliability and efficiency of the whole machine. In addition, the gearbox is in the priority assembly sequence during the assembly process of the whole machine, and the space of the position of the whole machine is small. When repairing, a large number of other components need to be disassembled, and the repair time and cost are huge.
[0003] If the problem is found outside the factory, it usually needs to be transported to the factory for disassembly and repair, which further increases the maintenance period and cost, and seriously affects the brand influence. Therefore, it is better to find the problem of the gearbox in advance and deal with it, avoid the flow of defective products to the next process, and improve the quality and reliability of the gearbox, which has a great influence on production efficiency, gearbox and whole machine maintenance cost, whole machine reliability and brand image improvement.
[0004] And the tractor gearbox, especially the power shift hydraulic differential gearbox, has a complex structure, which not only includes a mechanical mechanism transmission part, but also includes a hydraulic transmission and an electrical control part. Therefore, the tractor gearbox testing platform needs to verify the reliability of the mechanical transmission part, and also needs to monitor the internal hydraulic pressure and control state to ensure the function and quality reliability of the gearbox.
[0005] For gearbox transmission efficiency and reliability testing, the existing common scheme is to load at the output end and confirm by testing the input and output power. For gearbox function testing, the common scheme is to design a special testing device for different functions. In this way, the whole gearbox testing is complicated and needs multiple testing devices to complete the overall testing, which is low in testing efficiency, inconvenient for testing, and high in development and testing device cost. SUMMARY
[0006] The present application provides a gearbox assembly testing device, which can comprehensively test and check the gearbox without the need for developing multiple testing devices, is high in testing efficiency and convenient, is low in cost, and discloses a related testing method.
[0007] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:
[0008] A gearbox assembly testing device, the testing device comprises a tooling table, a fixing frame for placing a gearbox to be tested is arranged on the middle part of the tooling table, and an input testing mechanism, an output testing mechanism, a heat dissipation testing mechanism, a gear shifting testing mechanism, an oil receiver and an electrical control table are further arranged on the tooling table.
[0009] The input testing mechanism is arranged at one end of the workbench, for providing power to the gearbox and testing the input power, and the output testing mechanism is arranged at the other end of the workbench in a triangular distribution and is movable, for adding load to the gearbox and testing the output power;
[0010] The heat dissipation testing mechanism is arranged at one side of the output testing mechanism and is communicated with the output testing mechanism and the gearbox through a pipeline, for dissipating heat from the output testing mechanism and the gearbox, and testing the heat dissipation performance of the gearbox;
[0011] The shift testing mechanism is arranged at both ends of the fixed frame and is connected with the clutch and the mechanical shift structure of the gearbox, for controlling the operation of the clutch and the mechanical shift structure of the gearbox, and testing the shift smoothness of the gearbox;
[0012] The oil collector and the electric control console are arranged at the side of the workbench, the oil collector is used for delivering hydraulic oil to the gearbox before testing and storing the hydraulic oil after testing, and the electric control console is electrically connected with the input testing mechanism, the output testing mechanism, the heat dissipation testing mechanism and the shift testing mechanism, for collecting the test data information to determine whether the gearbox is qualified and controlling the gearbox during testing.
[0013] Preferably, the electric control console comprises an electric control console frame, a steering testing mechanism, a gearbox monitoring assembly, a data processing terminal, a connector and a control button, the steering testing mechanism is arranged at one end of the electric control console frame, for testing the steering performance of the gearbox, the data processing terminal is arranged in the other end of the electric control console frame and is connected with the connector through a communication line, for controlling the gearbox and processing the test data information of the gearbox;
[0014] The connector is arranged on the side surface of the electric control console frame and is connected with the input testing mechanism, the output testing mechanism, the heat dissipation testing mechanism, the shift testing mechanism, the steering testing mechanism, the gearbox monitoring assembly and the gearbox through the communication line, the gearbox monitoring assembly is used for being installed on the gearbox, for monitoring the hydraulic pressure and the oil temperature in the gearbox, and the control button is arranged on the upper surface of the electric control console frame, for controlling the on-off operation of each mechanism.
[0015] Preferably, the steering testing mechanism comprises a support frame, a steering wheel assembly and an angle sensor, the support frame is arranged in the electric control console frame, one end of the steering wheel assembly is arranged on the support frame and the other end extends to the outer surface of the electric control console frame, and the angle sensor is arranged on the shaft of the steering wheel assembly, for delivering the angle information of the steering wheel assembly to the data processing terminal.
[0016] As preferred, the gearbox monitoring assembly comprises a pressure sensor and a temperature sensor for installation on the gearbox, the pressure sensor being used to transmit the hydraulic pressure data of the gearbox to the data processing terminal, and the temperature sensor being used to transmit the hydraulic oil temperature data of the gearbox to the data processing terminal.
[0017] As preferred, the input test mechanism comprises an input support seat, a driving motor, an input coupling, an input torque sensor, a motor frequency converter and a protective cover assembly, the input support seat being arranged on the tooling table, the driving motor being arranged on the input support seat, one end of the input coupling being connected with the driving motor, and the other end being connectable with the input shaft of the gearbox for driving the gearbox to operate;
[0018] The input torque sensor is arranged on the input coupling for detecting the dynamic torque, rotating speed and power information of the input end and transmitting the information to the electric control console, the motor frequency converter is arranged on the tooling table and electrically connected with the driving motor for controlling and adjusting the operation of the driving motor, and the protective cover assembly is arranged on the movable tooling table for covering the driving motor.
[0019] As preferred, the output test mechanism comprises an output support seat, an output loader, an output coupling and an output torque sensor, the output support seat being arranged on the tooling table, the output loader being arranged on the output support seat, one end of the output coupling being connected with the output loader, and the other end being connectable with the output end of the gearbox, and the output torque sensor being arranged on the output coupling for detecting the dynamic torque, rotating speed and power information of the output end and transmitting the information to the electric control console.
[0020] As preferred, the heat dissipation test mechanism comprises a heat sink and a heat dissipation pump, the heat sink being arranged on the tooling table, and the heat dissipation pump being beside the heat sink and being in communication with the output loader and the heat sink through a pipeline.
[0021] As preferred, the gear shifting test mechanism comprises a gear shifting support seat, a gear shifting electric push rod and a gear shifting torque sensor, the gear shifting support seat being symmetrically arranged on the tooling table, the gear shifting electric push rod being arranged on the gear shifting support seat for controlling the clutch and the gear shifting operating rod of the gearbox, and the gear shifting torque sensor being arranged on the gear shifting electric push rod for collecting the torque of the clutch and the gear shifting operating rod during gear shifting and transmitting the torque to the electric control console.
[0022] As preferred, based on the test device, the test method comprises the following steps:
[0023] A. Efficiency test: the gearbox is driven by the motor, the output loader loads the output end of the gearbox, the input torque sensor and the output torque sensor transmit the speed and torque data of the input shaft and the output shaft of the gearbox to the electric control console, the data processing terminal of the electric control console determines the power of the input and output ends according to the test data, and then confirms the transmission efficiency of the gearbox, and compares the measured transmission efficiency with the set range to confirm the working state of the gearbox;
[0024] B. Hydraulic shift test: when the shift function test is performed, the data processing terminal selects the working gear on the gearbox, gives the corresponding shift valve body control signal on the gearbox, controls the corresponding shift valve body to work, monitors the hydraulic pressure through the pressure sensor, and at the same time monitors the output shaft speed in step A, and determines whether the gearbox state is qualified by determining whether the set value is met;
[0025] C. Mechanical shift test: when testing, the data processing terminal controls the shift electric push rod to work through the control signal, and the shift torque sensor records the torque size at this time, and transmits the data information to the data processing terminal, and the data processing terminal determines whether the operation torque size meets the set value range, so as to determine whether the state of the main clutch and the mechanical shift part of the gearbox is normal;
[0026] D. Steering test: select the steering mode, the data processing terminal confirms the working current size of the proportional valve of the gearbox, and adjusts the working current size of the proportional valve through the PWM mode, and then detects the actual working current size of the proportional valve, the hydraulic pressure size of the clutch detected by the pressure sensor, and the output shaft speed detected by the output torque sensor, and determines whether the differential steering function, i.e. whether the clutch working state is normal, according to whether the three data relationships match;
[0027] E. Heat dissipation test: select the working mode, the data processing terminal controls the operating speed of the radiator, and monitors the internal hydraulic oil temperature of the gearbox through the temperature sensor, and determines whether the oil temperature is within the set range according to the comparison of the temperature size and the set value, so as to determine whether the state of the gearbox is qualified.
[0028] As preferred, the steering mode in step D has a manual steering mode and an automatic steering mode. If the manual steering mode is selected, the angle sensor transmits the steering angle data to the data processing terminal, and the data processing terminal confirms the working current size of the proportional valve of the gearbox according to the angle data, and controls the working current of the proportional valve through the PWM mode, and then detects the actual working current size of the proportional valve, the hydraulic pressure size of the clutch detected by the pressure sensor, and the output shaft speed detected by the output torque sensor, and determines whether the differential steering function, i.e. whether the clutch working state is normal, according to whether the three data relationships match;
[0029] If the automatic steering mode is selected, the data processing terminal directly controls the proportional valve current of the gearbox by PWM mode from 0 to linearly increase to the maximum working current, and then detects the actual working current size of the proportional valve, the hydraulic pressure size of the clutch detected by the pressure sensor, and the output shaft speed detected by the output torque sensor. According to whether the data relationship of the three is matched, it is judged whether the differential steering function, that is, the working state of the clutch, is normal.
[0030] There are two working modes in step E: one is to monitor the speed of the radiator and the temperature of the hydraulic oil of the gearbox. When the oil temperature is higher than the set range, the speed of the radiator is increased. When the oil temperature is lower than the set range, the speed of the radiator is reduced. When the oil temperature continues to be in the set range, the required amount of heat dissipation capacity of the gearbox is confirmed according to the size of the radiator speed and the heat dissipation characteristics. The second is that the speed of the radiator is kept constant. By monitoring the size of the hydraulic oil temperature of the gearbox and comparing it with the set value, it is judged whether the oil temperature is in the set range, so as to judge whether the state of the gearbox is qualified.
[0031] Compared with the prior art, the beneficial effects of the present application are:
[0032] 1. Without the need to develop a variety of test devices, the gearbox can be tested and checked systematically, the test efficiency is high and convenient, and the cost is low;
[0033] 2. The test efficiency of the gearbox and the monitoring and judgment of the state of the gearbox can be realized by the input test mechanism and the output test mechanism;
[0034] 3. The shift smoothness and pressure state of the gearbox are monitored by the electric control console controlling the hydraulic shift valve body and the shift test mechanism of the gearbox, and the shift state is judged;
[0035] 4. The working state of the hydraulic differential clutch is detected by the steering test mechanism of the electric control console, which simulates the control of the whole machine working state of the hydraulic differential clutch, and monitors the actual current and pressure of the proportional valve;
[0036] 5. The heat dissipation capacity of the gearbox is tested by the heat dissipation test mechanism, and the oil temperature of the gearbox is monitored by the temperature sensor to obtain the heat dissipation requirement when the oil temperature reaches a certain state, and to provide parameters for matching the radiator of the whole machine. In a certain heat dissipation state, the oil temperature in the gearbox is monitored to determine whether the oil temperature state is normal, so as to analyze whether the working state of the internal parts is normal. BRIEF DESCRIPTION OF DRAWINGS
[0037] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;
[0038] Figure 2 is a schematic diagram of the internal structure of the present application;
[0039] Figure 3 Fig. 1 is a schematic diagram of the internal structure of the electric console according to the present application;
[0040] Figure 4 Fig. 2 is a schematic diagram of the steering test mechanism according to the present application;
[0041] Figure 5 Fig. 3 is a schematic diagram of the test method logic according to the present application. DETAILED DESCRIPTION
[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.
[0043] It should be noted that when a component / part is referred to as "disposed on" another component / part, it can be directly disposed on the other component / part or there can be a middle component / part. When a component / part is referred to as "connected / coupled" to another component / part, it can be directly connected / coupled to the other component / part or there can be a middle component / part. The term "connected / coupled" used herein can include electrical and / or mechanical physical connection / coupling. The term "comprising / including" used herein refers to the existence of the features, steps or components / parts, but does not exclude the existence or addition of one or more other features, steps or components / parts. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.
[0044] 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 in the description herein is for describing specific embodiments only and is not intended to be limiting of the application.
[0045] Referring to Figs. 1-3, Figure 1 and Figure 2 A gearbox assembly test device is shown in Figs. 1-3, which includes a tooling table 1, a fixing frame 2 for placing a gearbox to be tested is arranged on the middle of the tooling table 1, and an input test mechanism 3, an output test mechanism 4, a heat dissipation test mechanism 5, a gear shifting test mechanism 7, an oil receiver 6 and an electric console 8 are further arranged on the tooling table 1.
[0046] The input test mechanism 3 is arranged at one end of the tooling table 1, which is used to provide power for the operation of the gearbox and test the input power thereof. The output test mechanism 4 is arranged at the other end of the tooling table 1 in a triangular distribution and is movable, which is used to increase the load of the gearbox and test the output power thereof. A slide rail assembly can be arranged under the output test mechanism 4.
[0047] The input test mechanism 3 comprises an input support base 31, a driving 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 arranged on the tooling table 1. The driving motor 32 is arranged on the input support base 31. One end of the input coupling 33 is connected with the driving motor 32, and the other end is connectable with the input shaft of the gearbox for driving the gearbox to operate.
[0048] The input torque sensor 34 is arranged on the input coupling 33 for detecting the dynamic torque, rotating speed and power information of the input end and transmitting the information to the electric control console 8. The motor frequency converter 35 is arranged on the tooling table 1 and electrically connected with the driving motor 32 for controlling and adjusting the operation of the driving motor 32. The protective cover assembly 36 is arranged on the tooling table 1 and movable for covering the driving motor 32.
[0049] The output test mechanism 4 comprises 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 arranged on the tooling table 1 and can be slidably arranged along the slide rail or fixedly arranged. The output loader 42 is arranged on the output support base 41 and is a magnetic powder brake. One end of the output coupling 43 is connected with the output loader 42, and the other end is connectable with the output end of the gearbox. The output torque sensor 44 is arranged on the output coupling 43 for detecting the dynamic torque, rotating speed and power information of the output end and transmitting the information to the electric control console 8.
[0050] During the efficiency performance test of the gearbox, the driving motor 32 drives the gearbox to work, and the output loader 42 loads the output end of the gearbox. The input torque sensor 34 and the output torque sensor 44 transmit the rotating speed and torque data of the input shaft and the output shaft of the gearbox to the data processing terminal 84 of the electric control console 8. The data processing terminal 84 determines the power of the input and output ends according to the test signal data, and then confirms the output power to input power ratio of the gearbox working, and compares the measured transmission efficiency with the set range to confirm the working state of the gearbox.
[0051] The heat dissipation test mechanism 5 is arranged on one side of the output test mechanism 4 and communicates with the output test mechanism 4 and the gearbox through pipelines for dissipating heat for the output test mechanism 4 and the gearbox and testing the heat dissipation performance of the gearbox. The heat dissipation test mechanism 5 comprises a radiator 51 and a heat dissipation pump 52. The radiator 51 is arranged on the tooling table 1. The heat dissipation pump 52 is beside the radiator 51 and communicates with the output loader 42 and the radiator 51 through pipelines.
[0052] The radiator 51 has two flow paths inside: one flow path is used to dissipate heat for the output loader 42, the liquid in the heat dissipation flow path inside the output loader 42 flows into the radiator 51 through the heat dissipation pump 52, and after being cooled by the radiator 51, it flows back to the inside of the output loader 42; the other flow path is used to dissipate heat for the hydraulic oil in the gearbox, the hydraulic oil in the gearbox flows through the radiator 51 under the action of the hydraulic pump, and after being cooled, it flows back to the inside of the gearbox.
[0053] There are two working modes during the heat dissipation test: one is used for new product data investigation, heat dissipation capacity test, which is used to confirm the heat dissipation capacity required when the gearbox system is working normally. In this mode, the speed of the radiator 51 and the oil temperature of the gearbox are monitored. When the oil temperature is higher than the set range, the speed of the radiator 51 is increased; when the oil temperature is lower than the set range, the speed of the radiator 51 is decreased; when the oil temperature continues to be in the set range, the speed of the radiator 51 is confirmed, and based on the speed of the radiator fan, the size and heat dissipation characteristics of the radiator 51 are confirmed to confirm the heat dissipation capacity required by the gearbox; the other is the heat generation determination mode of the gearbox, which is used to confirm whether there is an abnormal heating condition in the gearbox, so as to determine whether the state of the gearbox is normal. In this mode, the speed of the radiator 51 is kept constant, the oil temperature is monitored by the temperature sensor 832, and compared with the set value to determine whether the oil temperature is within the set range, so as to determine whether the state of the gearbox is qualified.
[0054] The gear shifting test mechanism 7 is arranged beside the two ends of the fixed frame 2 and connected with the clutch and mechanical gear shifting structure of the gearbox, which is used to control the operation of the clutch and mechanical gear shifting structure of the gearbox and test the gear shifting smoothness of the gearbox; the gear shifting test mechanism 7 comprises a gear shifting support 71, a gear shifting electric push rod 72 and a gear shifting torque sensor 73. The gear shifting support 71 is symmetrically arranged on the tool table 1, the gear shifting electric push rod 72 is arranged on the gear shifting support 71 and used to control the clutch and gear shifting operating rod of the gearbox, and the gear shifting torque sensor 73 is arranged on the gear shifting electric push rod 72 and used to collect the torque of the clutch and gear shifting operating rod during gear shifting and transmit it to the electric control table 8.
[0055] The gear shifting test includes mechanical gear shifting part test and hydraulic gear shifting test. During the mechanical gear shifting part test, the electric control table 8 controls the signal to control the gear shifting electric push rod 72 to work, the gear shifting torque sensor 73 records the torque at this time and transmits the data to the data processing terminal 84 of the electric control table 8, and the data processing terminal 84 judges whether the operating torque meets the set value range, so as to determine whether the state of the main clutch and mechanical gear shifting part of the gearbox is normal.
[0056] In the hydraulic gear shifting test, the gear shifting valve is on the gearbox body, which is used to control the working gear of the gearbox. The electric control console 8 controls the corresponding gear working by sending signals to different gear shifting valves. When the corresponding gear working is needed, the corresponding gear shifting valve is controlled by sending electric control signals to realize the corresponding gear working. The pressure sensor 831 is connected to the gearbox gear shifting valve to detect the hydraulic pressure of the valve body when different gears are working. When the gear shifting function test is performed, the electric control console 8 selects the working gear and sends control signals to the corresponding gear valve to control the corresponding valve working. At this time, the hydraulic pressure and the output shaft speed are monitored, and whether the gearbox state is qualified is determined by whether the set value is met.
[0057] The oil receiver 6 and the electric control console 8 are arranged on the side of the tooling table 1. The oil receiver 6 is used to deliver hydraulic oil to the gearbox before testing and to recover and store hydraulic oil after testing. The electric control console 8 is electrically connected with the input test mechanism 3, the output test mechanism 4, the heat dissipation test mechanism 5, and the gear shifting test mechanism 7 for collecting test data information to determine whether the gearbox is qualified and to control the gearbox during testing.
[0058] Please refer to Figure 3 and Figure 4 The electric control console 8 includes an electric control console frame 81, a steering test mechanism 82, a gearbox monitoring assembly 83, a data processing terminal 84, a wiring device 85, and control buttons 86. The steering test mechanism 82 is arranged on one end of the electric control console frame 81 for testing the steering performance of the gearbox. The data processing terminal 84 is arranged in the other end of the electric control console frame 81 and is connected with the wiring device 85 through communication lines for controlling the gearbox and processing test data information of the gearbox. The wiring device 85 is arranged on the side of the electric control console frame 81 and is connected with the input test mechanism 3, the output test mechanism 4, the heat dissipation test mechanism 5, the gear shifting test mechanism 7, the steering test mechanism 82, the gearbox monitoring assembly 83, and the gearbox through communication lines. The gearbox monitoring assembly 83 is used to be installed on the gearbox to monitor the hydraulic pressure and oil temperature inside the gearbox. The control buttons 86 are arranged on the upper surface of the electric control console frame 81 for controlling the on-off operation of each mechanism.
[0059] The gearbox monitoring assembly 83 includes a pressure sensor 831 and a temperature sensor 832 for being installed on the gearbox. The pressure sensor 831 is used to transmit the hydraulic pressure data of the gearbox to the data processing terminal. The temperature sensor 832 is used to transmit the hydraulic oil temperature data of the gearbox to the data processing terminal 84.
[0060] Turning to the test mechanism 82, it includes a support frame 821, a steering wheel assembly 822, and an angle sensor 823. The support frame 821 is arranged in the electric control console 81, the steering wheel assembly 822 is arranged on one end of the support frame 821 and extends to the outer surface of the electric control console 81, and the angle sensor 823 is arranged on the shaft of the steering wheel assembly 822 and 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.
[0061] During the steering test, the steering wheel assembly 822 drives the angle sensor 823, so as to confirm the steering angle. The data processing terminal 84 controls the current size passing through the proportional valve through the PWM mode according to the steering angle, so as to control the hydraulic pressure at the clutch, and further control the output shaft speed and steering. An auxiliary current detector can be used in the circuit to detect the actual current size passing through the proportional valve. The pressure sensor 831 is connected to the clutch and used to detect the working pressure at the clutch. The working state of the clutch is determined by judging the actual current size of the proportional valve, the output shaft speed, and the hydraulic pressure at the clutch.
[0062] Referring to FIG. 1, Figure 5 The test method of the transmission assembly test device is based on the test device, and includes the following steps:
[0063] A. Efficiency test: the transmission is driven by the driving motor 32, and the output load 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 shaft and the output shaft of the transmission to the electric control console 8. The data processing terminal 84 of the electric control console 8 determines the power size of the input and output ends according to the test data, and further confirms the transmission efficiency. The actual transmission efficiency is compared with the set range to confirm the working state of the transmission.
[0064] B. Hydraulic gear shifting test: when the gear shifting function test is performed, the data processing terminal 84 selects the working gear on the transmission, and gives a control signal to the corresponding gear shifting valve body on the transmission to control the working of the corresponding gear shifting valve body. The hydraulic pressure is monitored by the pressure sensor 831, and the output shaft speed is monitored in step A. Whether the set value is met is determined to judge whether the transmission is qualified.
[0065] C. Mechanical gear shifting test: the data processing terminal 84 controls the gear shifting electric push rod 72 to work during the test, and the gear shifting torque sensor 73 records the torque size at this time and transmits the data information to the data processing terminal 84. The data processing terminal 84 determines whether the operation torque size meets the set value range, so as to determine whether the main clutch and the mechanical gear shifting part of the transmission are normal.
[0066] D. Steering test: select steering mode, data processing terminal 84 confirms the proportional valve current of the gearbox, and controls the proportional valve current by PWM method to adjust, and then detects the actual working current of the proportional valve, the hydraulic pressure of the clutch by pressure sensor 831, and the output shaft speed by output torque sensor 44, and determines whether the differential steering function, i.e. the working state of the clutch, is normal according to the matching of the three data relationships;
[0067] E. Heat dissipation test: select working mode, data processing terminal 84 controls the running speed of radiator 51, and monitors the temperature of the hydraulic oil in the gearbox by temperature sensor 832, and determines whether the oil temperature is within the set range by comparing the temperature with the set value, so as to determine whether the gearbox is qualified.
[0068] The steering mode in step D has manual steering mode and automatic steering mode. If the manual steering mode is selected, the angle data of the steering is transmitted to data processing terminal 84 by angle sensor 823, and data processing terminal 84 confirms the proportional valve current of the gearbox according to the angle data, and controls the proportional valve current by PWM method, and then detects the actual working current of the proportional valve, the hydraulic pressure of the clutch by pressure sensor 831, and the output shaft speed by output torque sensor 44, and determines whether the differential steering function, i.e. the working state of the clutch, is normal according to the matching of the three data relationships;
[0069] If the automatic steering mode is selected, data processing terminal 84 directly controls the proportional valve current of the gearbox to linearly increase from 0 to the maximum working current by PWM method, and then detects the actual working current of the proportional valve, the hydraulic pressure of the clutch by pressure sensor 831, and the output shaft speed by output torque sensor 44, and determines whether the differential steering function, i.e. the working state of the clutch, is normal according to the matching of the three data relationships;
[0070] The working mode in step E has two modes: one is to monitor the speed of radiator 51 and the temperature of the hydraulic oil in the gearbox. 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, and when the oil temperature is continuously within the set range, the required amount of heat dissipation capacity of the gearbox is confirmed according to the size of the speed of radiator 51 based on the size and heat dissipation characteristics of radiator 51; the other is that the speed of radiator 51 remains constant, and the temperature of the hydraulic oil in the gearbox is monitored, and compared with the set value to determine whether the oil temperature is within the set range, so as to determine whether the gearbox is qualified.
[0071] The application can comprehensively test the gearbox without developing various testing devices, is high in testing efficiency and convenient, and is low in cost; the input testing mechanism 3 and the output testing mechanism 4 can test the working efficiency of the gearbox and monitor and judge the state of the gearbox; the electric control console 8 controls the hydraulic gear shifting valve body and the gear shifting testing mechanism 7 to test the gear shifting smoothness and pressure state of the gearbox, and judges whether the gear shifting state is normal; the steering testing mechanism 82 of the electric control console 8 simulates the control of the hydraulic differential clutch when the whole machine works, monitors the actual current and pressure of the proportional valve, and tests whether the working state of the hydraulic differential clutch is normal; the heat dissipation testing mechanism 5 controls the heat dissipation capacity of the gearbox, the temperature sensor 832 monitors the oil temperature of the gearbox, obtains the heat dissipation demand when the oil temperature reaches a certain state, provides parameters for matching the radiator of the whole machine, monitors the oil temperature in the gearbox under a certain heat dissipation state, judges whether the oil temperature state is normal, and thus analyzes whether the working state of the internal parts is normal.
[0072] The above is only the preferred embodiment of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can make equivalent replacement, change or modification according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.
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.
9. A test method for a transmission assembly testing device, characterized in that, Based on the testing apparatus according to any one of claims 1-8, the testing method includes the following steps: A. Efficiency Test: The drive motor drives the gearbox to work, and the output loader loads the output end of the gearbox. The input torque sensor and the output torque sensor transmit the speed and torque data of the gearbox input shaft and output shaft to the electronic control panel. The data processing terminal of the electronic control panel determines the power of the input and output ends based on the test data, thereby confirming the transmission efficiency of the gearbox. At the same time, the measured transmission efficiency is compared with the set range to confirm the working status of the gearbox. B. Hydraulic shift test: When performing the shift function test, the data processing terminal 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 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. C. Mechanical shift test: During the test, the data processing terminal control signal controls the shift electric push rod to work, the shift torque sensor records the torque at this time, and transmits the data information to the data processing terminal. The data processing terminal 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. D. Steering test: Select the steering mode, the data processing terminal 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, and the output shaft speed detected by the output torque sensor. 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. E. Heat dissipation test: Select the working mode, the data processing terminal controls the radiator's operating speed, and monitors the temperature of the hydraulic oil inside the transmission through a temperature sensor. By comparing 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.
10. The test method according to claim 9, characterized in that, 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 through the angle sensor. The data processing terminal confirms 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, and the output shaft speed detected by the output torque sensor. 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. If the automatic steering mode is selected, the data processing terminal 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, and the output shaft speed detected by the output torque sensor. Based on whether the data relationship of the three is matched, it determines whether the differential steering function, i.e. the working status of the clutch, is normal. There are two working modes in step E: First, monitor the radiator speed and transmission hydraulic oil temperature. When the oil temperature is higher than the set range, increase the radiator speed; when the oil temperature is lower than the set range, decrease the radiator speed. When the oil temperature remains within the set range, determine the required cooling capacity of the transmission based on the radiator speed, radiator size, and cooling characteristics. Second, keep the radiator speed constant and monitor the transmission hydraulic oil temperature, comparing it with the set value to determine whether the oil temperature is within the set range, thereby determining whether the transmission is in good condition.