Tractor power box loading test bench and test method thereof

Abstract

The invention discloses a tractor power box loading test bench and a test method thereof, and belongs to the field of agricultural machinery detection equipment, the tractor power box loading test bench comprises a test unit, a driving unit, a loading unit and a control system, the test unit comprises a test box with a built-in clutch pack to be tested; the test box is provided with a first shaft and a second shaft which extend outwards and are used for transmitting to the clutch pack, the loading unit which is in transmission connection with the second shaft of the test box and is used for providing braking torque for the clutch pack is arranged, and the control unit controls the driving unit and the hydraulic unit to set working parameters according to preset test parameters; an actual working parameter I of the driving unit and an actual working parameter II of the testing unit are collected; the hydraulic unit is used for providing action pressure for the test box and the loading unit, rapid switching of forward rotation and reverse rotation loads of the tested equipment can be achieved based on the loading torque of the loading unit, and the reversing test efficiency can be improved by simulating the whole vehicle reversing working condition.

Description

Technical Field

[0001] This invention belongs to the technical field of agricultural machinery testing equipment, specifically relating to a test bench for loading a tractor power box and its testing method. Background Technology

[0002] In agricultural production, the tractor power box is a core component, and its performance directly affects the tractor's working efficiency and reliability.

[0003] Currently, existing tractor power box testing equipment has some shortcomings. For example, current electrically enclosed loading test benches cannot achieve rapid switching between forward and reverse loads of the power reversing gearbox; input interruptions can easily cause runaway at the loading end. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a test bench and test method for loading a tractor power box. By simulating forward-to-reverse and reverse-to-forward loading tests, the efficiency of reversing tests can be improved by simulating the reversing conditions of the whole vehicle.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides a processing method, comprising: The test unit includes a test chamber containing a clutch assembly to be tested; the test chamber has two outwardly extending shafts for driving the clutch assembly. A drive unit is connected to the shaft of the test box and is used to provide rotational driving force to the clutch assembly; The loading unit is driven to the second shaft of the test box and is used to provide braking torque to the clutch assembly; The control system includes a control unit and a hydraulic unit; the control unit is electrically connected to the drive unit, the test unit and the hydraulic unit to control the set operating parameters of the drive unit and the hydraulic unit according to the preset test parameters, and to collect the actual operating parameters of the drive unit and the actual operating parameters of the test unit; the hydraulic unit is connected to the test chamber and the loading unit, and is used to provide the action pressure to the test chamber and the loading unit.

[0006] Furthermore, the drive unit includes a drive motor, a coupling, a drive inertia disk, and a torque sensor; The drive motor is connected to the drive inertia disk via the first coupling; the drive inertia disk is connected to the torque sensor; the first shaft is connected to the torque sensor via the first universal joint and the second coupling. The torque sensor is used to detect and feed back the detected operating parameters to the control unit.

[0007] Furthermore, the loading unit includes brake one, brake two, loading inertia disk and damping fan; Brake 1 and Brake 2 are connected; Brake 1 is connected to shaft 2 in sequence through coupling 4, universal joint 2 and coupling 3; Brake 2 is connected to the loading inertia disk through a spline coupling; The damping fan is mounted on the shaft of the loading inertia disk; Brake 1 and Brake 2 are connected to a hydraulic unit, and the braking torque is adjusted through the hydraulic unit.

[0008] Furthermore, the hydraulic unit collects its own hydraulic high-pressure signal and lubrication flow signal during operation and transmits them to the control unit.

[0009] Furthermore, the drive motor is mounted on the motor adjustment base; the motor adjustment base is mounted on the drive module base.

[0010] Furthermore, the drive inertia disk is mounted on the drive inertia base; the drive inertia base is mounted on the drive module base.

[0011] Furthermore, the test box is mounted on fixed base one and fixed base two; fixed base one and fixed base two are mounted on the test bench.

[0012] Furthermore, the second working parameter includes the temperature, rotation speed, sliding time, and speed difference of the test chamber.

[0013] Furthermore, the operating parameter one includes torque information and speed information output by the drive unit.

[0014] Secondly, the present invention provides a method for testing the loading of a tractor power box, which uses any of the above-mentioned test benches for loading tractor power boxes and includes the following steps: According to the test requirements, the drive unit is adjusted to a preset speed by the control unit; the hydraulic unit is controlled by the control unit to apply a preset torque to the loading unit. According to the test requirements, the clutch adjustment of the test box is controlled by the control unit. The actual operating parameters of the acquisition drive unit (first) and the actual operating parameters of the test box (second) are collected.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: This invention provides a test bench for loading a tractor power box. It includes a loading unit that connects the test box to a shaft and provides braking torque to the clutch assembly. A control unit controls the drive unit and hydraulic unit to set operating parameters based on preset test parameters, and collects the actual operating parameters of the drive unit (parameter 1) and the test unit (parameter 2). The hydraulic unit provides actuating pressure to the test box and loading unit. Based on the loading torque of the loading unit, it enables rapid switching between forward and reverse loads on the tested equipment, and prevents runaway at the loading end when input is interrupted. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the test bench for loading the tractor power box provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the working principle of the test bench for loading the tractor power box provided in an embodiment of the present invention.

[0017] In the diagram: 1. Drive motor; 2. Coupling 1; 3. Drive inertia disk; 4. Torque sensor; 5. Coupling 2; 6. Universal shaft 1; 7. Test box; 8. Coupling 3; 9. Universal shaft 2; 10. Coupling 4; 11. Brake 1; 12. Brake 2; 13. Splined coupling; 14. Loading inertia disk; 15. Damping fan; 16. Motor adjustment base; 17. Drive module base; 18. Drive inertia base; 19. Test bench; 20. Fixed base 1; 21. Fixed base 2; 22. Adjustable loading module base; 23. Brake base; 24. Loading inertia disk base. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0021] Please see Figure 1 This embodiment introduces a test bench for loading a tractor power box, including a test unit, a drive unit, a loading unit, and a control system.

[0022] The testing unit includes a test chamber 7 containing a clutch assembly to be tested; the test chamber 7 has two outwardly extending shafts, shaft one and shaft two, for driving the clutch assembly; a drive unit is driven by shaft one of the test chamber and is used to provide rotational driving force to the clutch assembly; a loading unit is driven by shaft two of the test chamber 7 and is used to provide braking torque to the clutch assembly; the control system includes a control unit and a hydraulic unit; the control unit is electrically connected to the drive unit, the testing unit, and the hydraulic unit to control the set operating parameters of the drive unit and the hydraulic unit according to preset test parameters, and to collect the actual operating parameters one of the drive unit and the actual operating parameters two of the testing unit; the hydraulic unit is connected to the test chamber 7 and the loading unit, and is used to provide actuating pressure to the test chamber 7 and the loading unit.

[0023] In this embodiment, please refer to Figure 2 The control unit is specifically a console, and the hydraulic unit is specifically a hydraulic lubrication station. The hydraulic lubrication station is connected to the test chamber 7 and the loading unit via an oil circuit. Operating parameter two includes the temperature, speed, slippage time, and speed difference of the test chamber 7. Operating parameter one includes the torque and speed information output by the drive unit. Specifically, the drive unit includes a drive motor 1, a coupling 2, a drive inertia disk 3, and a torque sensor 4; the drive motor 1 is connected to the drive inertia disk 3 via coupling 2; the drive inertia disk 3 is connected to the torque sensor 4; shaft one is connected to the torque sensor 4 via universal joint 6 and coupling two 5; the torque sensor 4 is used to detect and feed back the detected operating parameter one to the control unit.

[0024] Secondly, the loading unit includes brake 11, brake 212, loading inertia disk 14, and damping fan 15. Brake 11 and brake 212 are connected. Brake 11 is connected to shaft 2 via coupling 410, universal joint 29, and coupling 38. Brake 212 is connected to loading inertia disk 14 via spline coupling 13. Damping fan 15 is coaxially mounted with loading inertia disk 14. Brake 11 and brake 212 are connected to a hydraulic lubrication station via an oil circuit. The control console controls the torque of brake 11 and brake 212 through the hydraulic lubrication station to provide the test bench with the starting torque under load, and adjusts the braking torque through the hydraulic unit. The hydraulic lubrication station provides operating pressure to test chamber 7, brake 11, and brake 212, and feeds back hydraulic high pressure signal and lubrication flow signal to the control console.

[0025] In addition, drive motor 1 is mounted on motor adjustment base 16; motor adjustment base 16 is mounted on drive module base 17, and motor adjustment base 16 supports drive motor 1, and is also supported by drive module base 17. Drive inertia disk 3 is mounted on drive inertia base 18; drive inertia base 18 is mounted on drive module base 17, and drive inertia base 18 supports drive inertia disk 3, and is also supported by drive module base 17. Test box 7 is mounted on fixed base one 20 and fixed base two 21; fixed base one 20 and fixed base two 21 are mounted on test bench 19, and fixed base one 20 and fixed base two 21 are supported by test bench 19. Brake one 11 and brake two 12 are mounted on brake base 23, loading inertia disk 14 is mounted on loading inertia disk base 24, brake base 23 and loading inertia disk base 24 are mounted on loading module adjustable base 22, and brake base 23 and loading inertia disk base 24 are supported by loading module adjustable base 22. Example

[0026] This embodiment provides a tractor power box loading test method, applicable to the tractor power box loading test bench in Embodiment 1, including the following steps: According to the test requirements, the drive unit is adjusted to a preset speed by the control unit; the hydraulic unit is controlled by the control unit to apply a preset torque to the loading unit. According to the test requirements, the clutch adjustment of the test box 7 is controlled by the control unit. The actual operating parameters of the acquisition drive unit (first) and the actual operating parameters of the test box 7 (second) are collected.

[0027] More specifically, it includes the following steps: S100, Test Bench Assembly: Install the test box 7 on the test bench 19. The left and right shafts 1 and 2 are connected to the drive unit and loading unit via universal joint 6 and universal joint 9, respectively. Select an appropriate damping fan 15 to simulate the system's internal resistance. Adjust the number of drive inertia disks 3 in the drive unit to simulate engine inertia, and adjust the number of loading inertia disks 14 in the loading unit to simulate the tractor's overall inertia. Connect the control console wiring to the test unit according to relevant technical requirements, and connect the hydraulic lubrication station to the test unit according to relevant technical requirements.

[0028] S200. The test is conducted using the installed test bench: (1) Dynamic reversal loading test: The control console adjusts the drive motor 1 to the required test speed. The control console applies the required torque to brake 11 and brake 2 12 through the hydraulic lubrication station. The control console engages the clutch of the test chamber 7 at the required frequency through a preset program. At the same time, the control console automatically collects data such as speed, acceleration, torque, temperature, and number of reversals.

[0029] (2) Interval dynamic shift loading test: The control console adjusts the drive motor 1 to the required test speed. The control console applies the required torque to brake 11 and brake 2 12 through the hydraulic lubrication station. The control console automatically switches the clutches of different gears in the test chamber 7 according to the required frequency and sequence through the automatic program. The control console automatically collects data such as speed, acceleration, torque, temperature, and number of gear shifts.

[0030] (3) PTO clutch pack loading test: The control console adjusts the drive motor 1 to the required test speed. The control console applies the required torque to brake 11 and brake 2 12 through the hydraulic lubrication station. The control console automatically engages the PTO clutch of the test chamber 7 through an automatic program. After engagement, it disengages within a specified time. The control console automatically collects data such as speed, acceleration, torque, temperature, and number of PTO engagements.

[0031] (4) Starting load test of the main clutch pack of the gearbox: During the various tests in step S200, the control console monitors the status of the test bench in real time. If abnormal vibration, clutch abnormality, or temperature abnormality occurs, the console can automatically stop the machine in time and brake brake 11 and brake brake 12 at the same time.

[0032] In summary, the tractor power reversing loading test bench of the present invention can simulate forward-to-reverse and reverse-to-forward loading tests, simulate the reversing conditions of the whole vehicle, and solve the problem of difficult reversing tests; it can simulate interval power shifting loading conditions; it can simulate forward and reverse loaded start conditions; it can simulate PTO loaded start conditions; at the same time, the reversing loading adopts inertia disk loading to realize internal power circulation, saving testing costs; compared with the prior art, the present invention has the advantages of simple structure, high reliability, and simple operation.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit its protection scope. Although this disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading this disclosure, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims.

Claims

1. A test bench for loading a tractor power box, characterized in that, include: The test unit includes a test chamber containing a clutch assembly to be tested; the test chamber has two outwardly extending shafts for driving the clutch assembly. A drive unit is connected to the shaft of the test box and is used to provide rotational driving force to the clutch assembly; The loading unit is driven to the second shaft of the test box and is used to provide braking torque to the clutch assembly; The control system includes a control unit and a hydraulic unit; the control unit is electrically connected to the drive unit, the test unit and the hydraulic unit to control the set operating parameters of the drive unit and the hydraulic unit according to the preset test parameters, and to collect the actual operating parameters of the drive unit and the actual operating parameters of the test unit; the hydraulic unit is connected to the test chamber and the loading unit, and is used to provide the action pressure to the test chamber and the loading unit.

2. The test bench for loading a tractor power box according to claim 1, characterized in that, The drive unit includes a drive motor, a coupling, a drive inertia disk, and a torque sensor. The drive motor is connected to the drive inertia disk via the first coupling; the drive inertia disk is connected to the torque sensor; the first shaft is connected to the torque sensor via the first universal joint and the second coupling. The torque sensor is used to detect and feed back the detected operating parameters to the control unit.

3. The test bench for loading a tractor power box according to claim 1, characterized in that, The loading unit includes brake one, brake two, loading inertia disk and damping fan; Brake 1 and Brake 2 are connected; Brake 1 is connected to shaft 2 in sequence through coupling 4, universal joint 2 and coupling 3; Brake 2 is connected to the loading inertia disk through a spline coupling; The damping wind is coaxially installed with the loading inertia disk; Brake 1 and Brake 2 are connected to a hydraulic unit, and the braking torque is adjusted through the hydraulic unit.

4. The test bench for loading a tractor power box according to claim 1, characterized in that, The hydraulic unit collects its own high-pressure hydraulic signal and lubrication flow signal during operation and transmits them to the control unit.

5. The test bench for loading a tractor power box according to claim 1, characterized in that, The drive motor is mounted on the motor adjustment base; the motor adjustment base is mounted on the drive module base.

6. The test bench for loading a tractor power box according to claim 5, characterized in that, The drive inertia disk is mounted on the drive inertia base; the drive inertia base is mounted on the drive module base.

7. The test bench for loading a tractor power box according to claim 1, characterized in that, The test box is installed on fixed base one and fixed base two; fixed base one and fixed base two are installed on the test bench.

8. The test bench for loading a tractor power box according to claim 1, characterized in that, The second working parameter includes the temperature, rotation speed, sliding time, and speed difference of the test chamber.

9. The test bench for loading a tractor power box according to claim 1, characterized in that, The operating parameters include the torque and speed information output by the drive unit.

10. A method for testing the loading of a tractor power box, characterized in that, The test is conducted using the tractor power box loading test bench as described in any one of claims 1 to 9, and includes the following steps: According to the test requirements, the drive unit is adjusted to a preset speed by the control unit; the hydraulic unit is controlled by the control unit to apply a preset torque to the loading unit. According to the test requirements, the clutch adjustment of the test box is controlled by the control unit. The actual operating parameters of the acquisition drive unit (first) and the actual operating parameters of the test box (second) are collected.

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