Tractor multi-way valve offline detection test bed

Abstract

The utility model discloses a tractor multi-way valve off-line detection test bed which comprises a test bed body, a swing arm device, an air cylinder assembly, a pivotal bearing, a hydraulic system and an electric control assembly. One end of the swing arm device is connected with the test bench main body through a pivotal bearing, the swing arm device is driven by the cylinder assembly to swing and stop, a quick-insertion handle of the swing arm device is inserted into a multi-way valve interface for testing, and the hydraulic system is fixed in the test bench main body. The electric control assembly integrally controls control elements of the whole tractor multi-way valve offline detection test bench and is fixed on one side of the test bench main body. The hydraulic multi-way valve leakage testing device can be suitable for various tractor types by adjusting the rotation angle of the swing arm, can achieve testing of the maximum flow and the maximum pressure of each way of the hydraulic multi-way valve through one-time hitching, can detect the leakage rate of the neutral position of the multi-way valve in a certain time under different working condition loads, and is good in man-machine interaction, easy and convenient to operate and high in reliability. And the offline detection efficiency of the multi-way valve of the tractor and the reliability of a detection result are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tractor test equipment, and in particular relates to a tractor multi-way valve offline detection test bench. Background Art

[0002] The tractor multi-way valve is a device used on tractors to control the size and direction of hydraulic output, and is composed of one or more valve bodies. However, due to processing errors or improper assembly, the tractor multi-way valve is prone to problems such as insufficient hydraulic output power, leakage in the neutral position and failure to maintain pressure, so the hydraulic output and reliability of each tractor multi-way valve must be mastered before it leaves the factory.

[0003] At present, most of the tractor multi-way valve testing technologies use the method of superimposing weights on one end of the loading cylinder to load the working circuit, and judge the internal leakage of the multi-way valve in the neutral position by the expansion and contraction changes of the cylinder piston rod per unit time. The testing method is relatively primitive, and the different placement of the weights will also cause deviations in the results, which is inefficient and unreliable.

[0004] The existing multi-way valve testing equipment can automatically collect and analyze the flow characteristics of the valve block and give test results, but the test process is relatively cumbersome and experimental, and can only test the multi-way valve block individually, so it does not meet the fast beat requirements of tractor multi-way valve offline detection. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a tractor multi-way valve offline detection test bench, which can be suitable for various tractor models and saves test space. The tester can realize the maximum flow and maximum pressure test of the hydraulic multi-way valve and the neutral position leakage test of the multi-way valve by one connection. The human-computer interaction is good and the operation is simple, which greatly improves the efficiency of the tractor multi-way valve offline detection and the reliability of the detection results.

[0006] The utility model is realized by the following technical solutions:

[0007] A tractor multi-way valve offline detection test bench, comprising a test bench body, a swing arm device, a cylinder assembly, a slewing bearing, a hydraulic system, and an electronic control assembly;

[0008] One end of the swing arm device is connected to the test bench body through a slewing bearing, and swings and stops under the drive of the cylinder assembly. The quick-insert handle of the swing arm device is inserted into the multi-way valve interface for testing. The hydraulic system is fixed inside the test bench body. The electronic control component integrates and controls the control elements of the entire tractor multi-way valve offline detection test bench and is fixed on one side of the test bench body.

[0009] Preferably, the test bench body is fixed to the ground via anchor bolts.

[0010] Preferably, the test bench body includes a main frame, a rotary column, an electric control cabinet shell, a signal indicator light, a rubber stopper, and a proximity switch;

[0011] The rotary column and the electric control housing are welded inside the main frame, the signal indicator light, the rubber stopper and the proximity switch are installed and fixed on the upper end surface of the main frame, and the electric control component is fixed in the electric control cabinet shell.

[0012] Preferably, the electric control component is installed in an embedded manner in an electric control cabinet shell inside the test bench body. The electric control cabinet shell has a door on the side, and an operation panel and a switch button are arranged on the door panel.

[0013] Preferably, the swing arm device comprises a swing arm body, a slewing bearing connector, an oil pipe rack, an oil circuit block, and a quick-insert handle;

[0014] The slewing bearing at one end of the swing arm body is fixedly connected to the slewing column inside the test bench body through a slewing bearing connector. A flat plate is welded at the end of the swing arm body. An oil block is fixed above the flat plate and an oil pipe rack is connected below the flat plate. Several quick-insert handles are inserted into the oil pipe rack.

[0015] Preferably, a plurality of oil collecting cylinders and a detachable oil collecting pan for storing the quick-insertion handles are welded at the lower part of the oil pipe rack.

[0016] Preferably, a flow signal switch is installed at each oil inlet of the oil circuit block to determine whether the corresponding oil circuit is in a conducting state.

[0017] Preferably, the cylinder assembly adopts a center-sealed pneumatic reversing valve, and the swing arm device can be controlled to stop at any time within the swing arm rotation range through the operation panel button. The pneumatic reversing valve and the pneumatic two-piece are both installed inside the test bench body. The air source is introduced from the outside and enters the cylinder for driving through the pneumatic two-piece, the pneumatic reversing valve, and the pneumatic speed control valve. The tail of the cylinder is fixed to the test bench body through the cylinder seat, and the top piston rod joint is hinged to the slewing bearing connector.

[0018] Preferably, an outer edge is welded on the outer side of the slewing bearing connector for articulating with the cylinder piston rod joint of the cylinder assembly for driving.

[0019] Preferably, the hydraulic system includes a hydraulic main circuit and a hydraulic loading circuit. The hydraulic main circuit has two circuits connected in parallel, one of which is a spare circuit. The hydraulic loading circuit pressurizes the test main circuit through a loading cylinder to perform a neutral position leakage test on the tractor multi-way valve.

[0020] The beneficial effects of the utility model are:

[0021] (1) The tractor multi-way valve offline inspection test bench can be applied to various tractor models and save test space by adjusting the rotation angle of the swing arm during the factory offline inspection test;

[0022] (2) The tester can test the maximum flow and maximum pressure of each way of the hydraulic multi-way valve of the tested tractor with one hook-up;

[0023] (3) Through precise control of the hydraulic proportional valve of the loading circuit, the internal leakage per unit time of the neutral position of the multi-way valve under different working conditions and loads can be detected;

[0024] (4) The test bench is close to the side where the tester gets off the vehicle, with good human-machine interaction and easy operation, which greatly improves the efficiency of the tractor multi-way valve offline inspection and the reliability of the inspection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of the utility model tractor multi-way valve offline detection test bench;

[0026] Figure 2 This is the main structure diagram of the utility model tractor multi-way valve offline detection test bench;

[0027] Figure 3 This is the structural diagram of the swing arm device of the utility model tractor multi-way valve offline detection test bench;

[0028] Figure 4 This is the structural diagram of the rotary bearing connector of the utility model tractor multi-way valve offline detection test bench;

[0029] Figure 5 This is the pneumatic component structure diagram of the utility model tractor multi-way valve offline detection test bench;

[0030] Figure 6 This is the off-line test diagram of the utility model tractor multi-way valve off-line detection test bench;

[0031] Figure numerals: 1. Test bench body; 2. Swing arm device; 3. Cylinder assembly; 4. Slewing bearing; 5. Hydraulic system; 6. Electronic control assembly; 7. Loading cylinder; 8. Main frame; 9. Slewing column; 10. Electronic control cabinet shell; 11. Signal indicator light; 12. Rubber stopper; 13. Proximity switch; 14. Swing arm body; 15. Slewing bearing connector; 16. Oil pipe rack; 17. Oil circuit block; 18. Quick-insert handle; 19. Flow signal switch; 20. Oil collecting barrel; 21. Removable oil collecting tray; 22. Cylinder; 23. Cylinder seat; 24. Pneumatic speed regulating valve; 25. Pneumatic reversing valve; 26. Pneumatic two-piece. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below according to the accompanying drawings.

[0033] Embodiment 1:

[0034] like Figure 1 As shown, the tractor multi-way valve offline detection test bench includes: a test bench body 1, a swing arm device 2, a cylinder assembly 3, a slewing bearing 4, a hydraulic system 5, and an electronic control assembly 6; the test bench body 1 is fixed to the ground by anchor bolts, the swing arm device 2 is connected to the test bench body 1 by the slewing bearing 4, and can swing and stop under the drive of the cylinder assembly 3, the hydraulic system 5 is fixed inside the test bench body 1, and the electronic control assembly 6 is designed to be embedded and fixed on one side of the test bench body.

[0035] like Figure 2 As shown, the main body of the test bench includes a main frame 8, a rotary column 9, an electric control cabinet 10, a signal indicator 11, a rubber stopper 12, and a proximity switch 13; the rotary column 9 and the electric control housing 10 are welded inside the main frame 8, and the signal indicator 11, the rubber stopper 12 and the proximity switch 13 are installed and fixed on the upper end surface of the main frame 8. The electric control component 6 integrates and controls the control elements of the entire tractor multi-way valve offline detection test bench, adopts an embedded layout structure, and is installed in the electric control cabinet 10 inside the main body 1 of the test bench. The door is opened from the side for installation and maintenance, and the operation panel and switch buttons are set on the door for easy operation.

[0036] like Figure 3 As shown, the swing arm device 2 includes a swing arm body 14, a slewing bearing connector 15, an oil pipe rack 16, an oil circuit block 17, and a quick-insert handle 18; the swing arm body 14 is fixed at its slewing center with the slewing bearing connector 15, and a flat plate is welded at its end, the oil circuit block 17 is fixed on the top, and the oil pipe rack 16 is connected on the bottom, and a plurality of quick-insert handles 18 are inserted into the oil pipe rack 16. A plurality of oil receiving cylinders 20 and a detachable oil receiving pan 21 are welded at the bottom of the oil pipe rack 16 for storing the quick-insert handles. A flow signal switch 19 is installed at each oil inlet of the oil circuit block 4 to determine whether the corresponding oil circuit is in a conducting state.

[0037] like Figure 4 As shown, the slewing bearing connector 15 is used to connect and fix the slewing bearing 4 to the slewing column 9, and an outer edge is welded on the outer side thereof to be hinged to the cylinder piston rod joint for driving.

[0038] like Figure 5As shown, the cylinder assembly 3 is the power source for driving the swing arm device 2 to swing out and retract. It adopts a center-sealed pneumatic reversing valve 25. The swing arm device 2 can be controlled to stop at any time within the swing arm rotation range through the operation panel button. The pneumatic reversing valve 25 and the pneumatic two-way valve 26 are both installed inside the test bench body 1. The air source introduced from the outside passes through the pneumatic two-way valve 26, the pneumatic reversing valve 25, and the pneumatic speed regulating valve 24 in sequence and then enters the cylinder 22 for driving. The tail of the cylinder 22 is fixedly connected to the cylinder seat 23 and fixed to the test bench body 1, and the top piston rod joint is hinged to the slewing bearing connector 15.

[0039] The hydraulic system 5 includes a hydraulic main circuit and a hydraulic loading circuit. The hydraulic main circuit is a test circuit directly connected to the tractor multi-way valve to detect the maximum flow and pressure of the tractor multi-way valve. Two circuits are set in parallel, one of which is a spare circuit. If one circuit fails, the other circuit can be quickly switched without affecting the test rhythm; the hydraulic loading circuit pressurizes the test main circuit through the loading cylinder 7 to test the neutral position leakage of the tractor multi-way valve. If the piston rod of the loading cylinder extends too much and exceeds the specified value, the signal indicator light 11 prompts that the test fails.

[0040] Working process:

[0041] The swing arm of the multi-way valve offline test bench is initially in the retracted state, such as Figure 1 As shown, the proximity switch 13 is used to determine whether it is retracted into place, and a signal that the multi-way valve test bench can enter the test is provided to the tractor under test at the previous station. After the tester drives the tractor into the fixed position, he turns off the engine and gets off the vehicle. He presses a button on the control panel of the electric control cabinet to operate the swing arm to swing out to a suitable position and stop. Figure 6 As shown, after inserting the corresponding hydraulic quick plug into the multi-way valve interface, operate the hydraulic output lever after getting on the vehicle and igniting the engine to perform the maximum flow, maximum pressure and neutral position leakage tests in sequence according to the prompts of the signal indicator light. The test results can be observed through the color of the signal indicator light 11 and the display screen provided in the workshop. After the test is completed, the tester turns off the engine, gets off the vehicle, pulls out the multi-way valve quick plug connector and inserts it back into the corresponding oil collecting cylinder 20, then presses the button on the control panel to operate the swing arm to retract to the initial position. The test is over and the tester drives the vehicle to the next station. If the test fails, the tester can choose to restart the test or drive out directly on the control panel according to the relevant test process.

[0042] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other multiple embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should all fall within the scope of protection of the attached claims of the utility model and their equivalents.

Claims

1. A tractor multi-way valve offline detection test bench, characterized by: It comprises a test bench body (1), a swing arm device (2), a cylinder assembly (3), a slewing bearing (4), a hydraulic system (5), and an electronic control assembly (6); One end of the swing arm device (2) is connected to the test bench body (1) via a slewing bearing (4), and swings and stops under the drive of the cylinder assembly (3). The swing arm device (2) is inserted into the multi-way valve interface for testing through the quick-insertion handle. The hydraulic system (5) is fixed inside the test bench body (1). The electric control assembly (6) integrates and controls the control components of the entire tractor multi-way valve offline detection test bench and is fixed on one side of the test bench body (1).

2. A tractor multi-way valve offline detection test bench according to claim 1, characterized in that: The test bench body (1) is fixed to the ground via anchor bolts.

3. A tractor multi-way valve offline detection test bench according to claim 1 or 2, characterized in that: The test bench body (1) comprises a main frame (8), a rotary column (9), an electric control cabinet shell (10), a signal indicator light (11), a rubber stopper (12), and a proximity switch (13); The rotary column (9) and the electric control cabinet shell (10) are welded inside the main frame (8); the signal indicator light (11), the rubber stopper (12) and the proximity switch (13) are mounted and fixed on the upper end surface of the main frame (8); and the electric control component (6) is fixed in the electric control cabinet shell (10).

4. A tractor multi-way valve offline detection test bench according to claim 3, characterized in that: The electric control component (6) is installed in an embedded manner in an electric control cabinet (10) inside the test bench body (1); the electric control cabinet (10) has a door on the side, and an operation panel and a switch button are arranged on the door panel.

5. The tractor multi-way valve offline detection test bench according to claim 1, characterized in that: The swing arm device (2) comprises a swing arm body (14), a slewing bearing connector (15), an oil pipe rack (16), an oil passage block (17), and a quick-insert handle (18); The slewing bearing (4) at one end of the swing arm body (14) is fixedly connected to the slewing column (9) inside the test bench body (1) via a slewing bearing connector (15). A flat plate is welded to the end of the swing arm body (14). An oil block (17) is fixed above the flat plate and an oil pipe rack (16) is connected below the flat plate. A plurality of quick-insert handles (18) are inserted into the oil pipe rack (16).

6. A tractor multi-way valve offline detection test bench according to claim 5, characterized in that: A plurality of oil receiving cylinders (20) and a detachable oil receiving pan (21) for storing the quick-insertion handle (18) are welded to the lower part of the oil pipe rack (16).

7. The tractor multi-way valve offline detection test bench according to claim 5, characterized in that: A flow signal switch (19) is installed at each oil inlet of the oil circuit block (17) for judging whether the corresponding oil circuit is in a conducting state.

8. The tractor multi-way valve offline detection test bench according to claim 1, characterized in that: The cylinder assembly (3) adopts a center-sealed pneumatic reversing valve (25). The swing arm device (2) can be controlled to stop at any time within the swing arm rotation range by operating the panel button. The pneumatic reversing valve (25) and the pneumatic two-way valve (26) are both installed inside the test bench body (1). The air source introduced from the outside passes through the pneumatic two-way valve (26), the pneumatic reversing valve (25), and the pneumatic speed regulating valve (24) in sequence and then enters the cylinder (22) for driving. The tail of the cylinder (22) is fixed to the test bench body (1) through the cylinder seat (23), and the top piston rod joint is hinged to the slewing bearing connector (15).

9. A tractor multi-way valve offline detection test bench according to claim 5 or 8, characterized in that: The outer side of the slewing bearing connecting piece (15) is welded with an outer edge for being hingedly connected to the cylinder piston rod joint of the cylinder assembly (3) for driving.

10. The tractor multi-way valve offline detection test bench according to claim 1, characterized in that: The hydraulic system (5) comprises a hydraulic main circuit and a hydraulic loading circuit. The hydraulic main circuit has two circuits connected in parallel, one of which is a standby circuit. The hydraulic loading circuit pressurizes the test main circuit through a loading cylinder (7) to perform a neutral position leakage test on the tractor multi-way valve.

Images