Electro-hydraulic parking test system

Abstract

The utility model discloses an electro-hydraulic parking test system, which belongs to the technical field of electro-hydraulic parking test and comprises an oil tank connected with a motor pump set and used for providing power for the system. The plurality of to-be-measured pieces are communicated with the output end of the motor pump set in parallel, and pressure reducing valves are connected between the motor pump set and the plurality of to-be-measured pieces; the parking assembly comprises a load parking assembly, a durable parking assembly and a plurality of other parking assemblies; connecting a pipeline; a plurality of measuring instruments; one end of the load testing mechanism is communicated with the liquid outlet end of the motor pump set, and the other end of the load testing mechanism is communicated with the load parking assembly; the oil temperature machine is communicated with the oil tank; and the controller is used for receiving and processing information measured by various sensors and controlling the operation of electronic instruments in the system. According to the utility model, a set of hydraulic system can test a plurality of or a plurality of groups of electro-hydraulic parking products simultaneously or independently, and the temperature can be adjusted in real time according to the requirements of the system and a test program for oil temperature.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electro -hydraulic parking test, especially relates to a kind of electro -hydraulic parking test system. BACKGROUND

[0002] Parking mechanism is a safety device for preventing vehicle sliding in automatic transmission, for making car reliably and time limitlessly parked in certain position even on slope, is indispensable key mechanism in automatic transmission. Common driving mode of parking mechanism has motor drive and hydraulic drive two kinds.

[0003] In the design and production process of parking mechanism, its basic performance that should be reached must be tested, to confirm that parking mechanism can reach design target. For electro -hydraulic parking mechanism, its basic performance index includes parking release force, parking release duration, parking duration etc. Parking release force represents the power that hydraulic system can provide for parking drag link, and this power will be used to release parking pawl and parking ratchet self-locking state. Parking release duration and parking duration represent the time spent in releasing parking and executing parking, and for the intuitive feeling of user, it is the sensitivity of parking action.

[0004] Parking mechanism detection in prior art is single working condition, single point test. Its test platform cannot be competent for multiple test contents, cannot cope with complex and changeable working condition, oil temperature control cannot be controlled or controlled not timely enough and other problems.

[0005] Therefore, an electro -hydraulic parking test system is proposed. UTILITY MODEL CONTENT

[0006] To solve the above technical problems, the utility model provides an electro -hydraulic parking test system.

[0007] To achieve the above object, the utility model provides an electro -hydraulic parking test system, comprising:

[0008] Oil tank, motor pump group is connected to the oil tank, for providing power for system;

[0009] A plurality of measured parts, a plurality of the measured parts are connected in parallel to the motor pump group output end, and a pressure reducing valve is connected between the motor pump group and the plurality of measured parts;Parking assembly includes load parking assembly, endurance parking assembly and a plurality of other parking assemblies;

[0010] Connecting pipeline is used for the communication between structures;

[0011] A plurality of measuring instruments are respectively arranged on the connecting pipeline to be measured, and a plurality of the measuring instruments include a plurality of oil pressure monitoring sensors and a plurality of oil flow sensors;

[0012] A load testing mechanism, one end of which is communicated with the liquid outlet end of the motor pump group, and the other end of which is communicated with the load parking assembly;

[0013] An oil temperature machine, which is communicated with the oil tank and is used for heating and refrigerating the hydraulic oil in the oil tank;

[0014] A controller, which is used for receiving and processing the information measured by various sensors and controlling the operation of electronic devices in the system.

[0015] According to the electro-hydraulic parking test system provided by the utility model, the output end of the motor pump group is communicated with a safety valve, and the overflow port of the safety valve is communicated with the oil tank through a hydraulic oil circuit.

[0016] According to the electro-hydraulic parking test system provided by the utility model, the load testing mechanism comprises a pressing mechanism, the pressing mechanism is fixedly connected with the movable end of the load parking assembly through a load testing clamp, force sensors are connected between the pressing mechanism and the load testing clamp and between the load testing clamp and the load parking assembly, the pressing mechanism is communicated with the output end of the motor pump group, and the pressing mechanism is pressed through hydraulic pressure.

[0017] According to the electro-hydraulic parking test system provided by the utility model, a proportional overflow valve, a reversing valve and a speed regulating valve are further communicated between the pressing mechanism and the output end of the motor pump group.

[0018] According to the electro-hydraulic parking test system provided by the utility model, the oil pressure monitoring sensor and the oil flow sensor are respectively arranged between the pressing mechanism and the output end of the motor pump group and between the load parking assembly and the corresponding pressure reducing valve.

[0019] According to the electro-hydraulic parking test system provided by the utility model, an energy accumulator is further arranged between the pressing mechanism and the output end of the motor pump group.

[0020] According to the electro-hydraulic parking test system provided by the utility model, a coarse filter is arranged between the oil tank and the motor pump group and on the hydraulic oil circuit of the oil tank, a one-way valve is communicated with the outlet of the motor pump group, and a fine filter is communicated with the outlet of the one-way valve.

[0021] According to the electro-hydraulic parking test system provided by the utility model, temperature sensors and liquid level sensors are arranged in the oil tank.

[0022] The utility model provides a kind of electro-hydraulic parking test system, the movable end of durable parking assembly and several other parking assemblies is fixed with no-load test fixture, the oil pressure monitoring sensor is arranged between the durable parking assembly and its corresponding pressure reducing valve, the oil pressure monitoring sensor and stop valve are arranged between several other parking assemblies and its corresponding pressure reducing valve.

[0023] Compared with prior art, the utility model has the following advantages and technical effects:

[0024] Motor pump group extracts hydraulic oil from oil tank, provides power hydraulic oil for entire system, which is power source of entire test system operation;Motor pump group is connected with parking assembly, and each parallel connection branch is connected with pressure reducing valve, and pressure reducing valve can obtain a stable oil pressure at rear end, so the pressure at rear end of each branch pressure reducing valve is stable and does not interfere with each other, can realize that one set of hydraulic system simultaneously or individually tests multiple or multiple groups of electro-hydraulic parking products, including no-load test, endurance test and load test etc. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide further understanding of the present application, and the illustrative embodiments of the present application and its description are used to explain the present application, and do not constitute undue limitation on the present application.

[0026] Figure 1 It is connection schematic diagram of the utility model electro-hydraulic parking test system.

[0027] In the diagram: 1. Oil tank; 2. Coarse filter; 3. Motor pump unit; 4. Check valve; 5. Fine filter; 6. Liquid level sensor; 7. Temperature sensor; 8. Safety valve; 9. Proportional relief valve; 10. Accumulator; 11. Pressure reducing valve; 12. Oil pressure monitoring sensor; 13. Oil flow sensor; 1401. Load parking assembly; 1402. Durable parking assembly; 1403. Other parking assemblies; 15. Force sensor; 16. Load test fixture; 17. Clamping mechanism; 18. Speed ​​control valve; 19. Reversing valve; 20. Oil temperature controller; 21. Shut-off valve; 22. No-load test fixture. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1 As shown, this embodiment provides an electro-hydraulic parking test system, including:

[0031] Oil tank 1, which is connected to motor pump unit 3, is used to provide power to the system;

[0032] Several components to be measured are connected in parallel to the output end of the motor pump group 3. A pressure reducing valve 11 is connected between the motor pump group 3 and the several components to be measured. The parking assembly includes a load parking assembly 1401, a durable parking assembly 1402 and several other parking assemblies 1403.

[0033] Connecting pipes are used to connect various structures;

[0034] Several measuring instruments are respectively installed on the connecting pipeline to be measured. The several measuring instruments include several oil pressure monitoring sensors 12 and several oil flow sensors 13.

[0035] The load testing mechanism is connected at one end to the liquid outlet of the motor pump group 3 and at the other end to the load parking assembly 1401.

[0036] Oil temperature controller 20 is connected to oil tank 1 and is used to heat and cool the hydraulic oil in oil tank 1;

[0037] A controller is configured to receive and process information measured by various sensors and control the operation of electronic devices in the system.

[0038] The motor pump group 3 draws hydraulic oil from the oil tank 1 to provide power hydraulic oil for the entire system, which is the power source for the entire test system to operate; the motor pump group 3 is connected to the parking assembly, and a pressure reducing valve 11 is connected to each branch, so that a stable oil pressure is obtained at the rear end of the valve, and thus the pressure at the rear end of the pressure reducing valve 11 of each branch is stable and does not interfere with each other, so that one set of hydraulic system can simultaneously or individually test multiple or multiple groups of electro-hydraulic parking products, including idle test, endurance test and load test, etc. The load test is assisted by the load test mechanism; the measuring devices are connected to each branch or main line to measure the performance data of the electro-hydraulic parking mechanism, the oil flow sensor 13 measures the oil flow, and the oil pressure monitoring sensor 12 measures the oil pressure; the controller collects the data measured by the measuring devices and displays them through the display and other structures; the controller can control the oil temperature machine 20 to control the oil temperature in the oil tank 1, and the performance of the hydraulic system is greatly affected by the oil temperature, so the oil temperature machine 20 can adjust the temperature in real time according to the demand of the system and test outline; the controller can transmit the temperature, pressure, flow and other signals to the man-machine interface to provide test reports and preliminary judgment of OK / NG results, and the staff can analyze the data and judge whether it is abnormal according to the size of the value.

[0039] The embodiment provides an electro-hydraulic parking test system, and the output end of the motor pump group 3 is communicated with a safety valve 8, and the overflow port of the safety valve 8 is communicated with the oil tank 1 through a hydraulic oil circuit.

[0040] The safety valve 8 can protect the entire pressure system from damage caused by excessive pressure, and by limiting the system pressure within a safe range, a reliable guarantee is provided for the normal operation of the system.

[0041] The embodiment provides an electro-hydraulic parking test system, and the load test mechanism includes a pressing mechanism 17, the pressing mechanism 17 is fixedly connected to the movable end of the load parking assembly 1401 through a load test clamp 16, and a force sensor 15 is connected between the pressing mechanism 17 and the load test clamp 16 and between the load test clamp 16 and the load parking assembly 1401, and the output end of the pressing mechanism 17 is communicated with the motor pump group 3, and the pressing is performed through hydraulic pressure.

[0042] The pressing mechanism 17 and the movable end of the load parking assembly 1401 are pressed through the load test clamp 16, the pressing mechanism 17 applies a force to the movable end of the load parking assembly 1401, which is the resistance of the simulated load, and the force sensor 15 is arranged at both ends of the load test clamp 16, so that the tension and pressure of the load can be measured respectively, and the test under the working conditions of load simulation load test, load test with tensile force dynamometer and the like can be performed.

[0043] The embodiment provides an electro-hydraulic parking test system, and a proportional overflow valve 9, a reversing valve 19 and a speed regulating valve 18 are further communicated between the pressing mechanism 17 and an output end of the motor pump set 3.

[0044] By arranging the proportional overflow valve 9, different loads can be tested under the action of proportional overflow. The force sensor 15 can detect the force of the pressing mechanism 17 acting on the load test fixture 16, and the force sensor 15 sends signals to the controller in real time according to the frequency requirement. When the controller receives the signals, the controller compares the set load pressure, and when the feedback load pressure is higher than the set value, the controller sends a signal to the proportional overflow valve 9, requiring the proportional overflow valve 9 to reduce the pressure in the proportional range. On the contrary, when the controller compares the load pressure after receiving the signal and finds that the load pressure is lower than the set value, the controller sends a signal to the proportional overflow valve 9, requiring the proportional overflow valve 9 to increase the pressure in the proportional range. In this way, the load pressure can be stabilized within a certain accuracy range. The reversing valve 19 can switch the system between different working states by changing the direction of the oil, so as to realize the control of the pressing and releasing actions of the pressing mechanism 17, and then complete different test functions. The speed regulating valve 18 is used for accurately adjusting the flow size of the oil in the system. In some test links, it is necessary to accurately control the movement speed of the execution element such as the test fixture. The speed regulating valve 18 can realize the accurate control of the oil flow entering the execution element, so as to realize the accurate adjustment of the movement speed of the execution element, so as to meet the requirements of the test specification and the test accuracy.

[0045] The embodiment provides an electro-hydraulic parking test system, and an oil pressure monitoring sensor 12 and an oil flow sensor 13 are arranged between the pressing mechanism 17 and an output end of the motor pump set 3 and between the load parking assembly 1401 and a corresponding pressure reducing valve 11.

[0046] The electro-hydraulic parking performance under the load condition is tested.

[0047] The embodiment provides an electro-hydraulic parking test system, and an accumulator 10 is further arranged between the pressing mechanism 17 and an output end of the motor pump set 3.

[0048] In the hydraulic system, the pressure oil output by the oil supply pump set may have certain pressure fluctuation, which may affect the accuracy of the test and the stability of the system. The accumulator 10 can absorb and store these pressure fluctuations. When the system pressure rises, the accumulator 10 stores a part of the oil, so that the system pressure will not be too high; when the system pressure decreases, the accumulator 10 releases the stored oil to supplement the system pressure, so that the system pressure remains relatively stable. In this way, the stability of the system pressure can be ensured during the test process, such as the pressing and releasing operations of the electro-hydraulic parking, so as to provide a stable pressure environment for accurately testing the performance of the electro-hydraulic parking.

[0049] The embodiment provides an electro-hydraulic parking test system, a coarse filter 2 is arranged between an oil tank 1 and a motor pump set 3 and on a hydraulic oil circuit of the oil tank 1, a one-way valve 4 is communicated with an outlet of the motor pump set 3, and a fine filter 5 is communicated with an outlet of the one-way valve 4.

[0050] The one-way valve 4 prevents backflow of the hydraulic oil and protects the motor pump set 3, and the coarse filter 2 and the fine filter 5 can purify the oil in the oil tank 1. The oil in the oil tank 1 may be mixed with various impurities such as dust, metal scraps and oil sludge. The coarse filter 2 and the fine filter 5 can intercept the impurities and prevent the impurities from entering subsequent hydraulic system components such as pumps and valves, so as to avoid damage of the precise components due to abrasion and blockage of the impurity particles, thereby protecting normal operation of the entire hydraulic system, prolonging service life of system components, ensuring oil purity and helping to maintain stable performance of the hydraulic system.

[0051] The embodiment provides an electro-hydraulic parking test system, a temperature sensor 7 and a liquid level sensor 6 are arranged in an oil tank 1.

[0052] The temperature sensor 7 and the liquid level sensor 6 monitor the temperature and the liquid level in the oil tank 1 in real time and transmit measured data to a controller, so as to facilitate monitoring of the hydraulic oil in the oil tank 1 and timely troubleshooting or temperature regulation.

[0053] The embodiment provides an electro-hydraulic parking test system, a load-free test fixture 22 is fixed to movable ends of a durability parking assembly 1402 and a plurality of other parking assemblies 1403, an oil pressure monitoring sensor 12 is arranged between the durability parking assembly 1402 and a corresponding pressure reducing valve 11, and the oil pressure monitoring sensor 12 and a stop valve 21 are arranged between the plurality of other parking assemblies 1403 and the corresponding pressure reducing valves 11.

[0054] The stop valve 21 can be used for controlling an oil flow path of each branch in an oil circuit system. By opening or closing the stop valve 21, whether a specific branch participates in work can be determined, so as to realize oil circuit control of different test links or different test objects, so that the system can flexibly switch different test working conditions or test objects and the universality and flexibility of the test system are enhanced; the load-free test fixture 22 clamps the movable ends of the parking assemblies in a non-load working condition; and the oil pressure monitoring sensor 12 measures oil pressure on different paths.

[0055] The embodiment provides an electro-hydraulic parking test system, a coarse filter 2 is arranged between an oil tank 1 and a motor pump set 3 and on a hydraulic oil circuit of the oil tank 1, a one-way valve 4 is communicated with an outlet of the motor pump set 3, and a fine filter 5 is communicated with an outlet of the one-way valve 4.

[0056] In the description of the utility model, need understanding is, the term "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model, and it is not indicated or implied that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore it can not be understood as the limitation of the utility model.

[0057] The above-described embodiments are merely preferred modes of the utility model, and do not limit the scope of the utility model, and various modifications and improvements to the technical solutions of the utility model made by those skilled in the art without departing from the design spirit of the utility model shall fall within the protection scope of the utility model claimed.

Claims

1. An electro-hydraulic parking test system, characterized in that, The system comprises: an oil tank (1) connected with a motor pump group (3) for providing power for the system; a plurality of to-be-measured components connected in parallel with the output end of the motor pump group (3), and a pressure reducing valve (11) connected between the motor pump group (3) and each to-be-measured component; a parking assembly, including a load parking assembly (1401), a durability parking assembly (1402), and a plurality of other parking assemblies (1403); a connecting pipeline for connecting the structures; a plurality of measuring devices respectively arranged on the connecting pipelines to be measured, and the measuring devices include a plurality of oil pressure monitoring sensors (12) and a plurality of oil flow sensors (13); a load testing mechanism, one end of which is connected with the liquid outlet end of the motor pump group (3), and the other end of which is connected with the load parking assembly (1401); an oil temperature machine (20) connected with the oil tank (1) for heating and cooling the hydraulic oil in the oil tank (1); a controller for receiving and processing information measured by various sensors and controlling the operation of electronic devices in the system.

2. The electro-hydraulic parking test system of claim 1, wherein: The output end of the motor pump group (3) is connected with a safety valve (8), and the overflow port of the safety valve (8) is connected with the oil tank (1) through a hydraulic oil circuit.

3. The electro-hydraulic parking test system of claim 1, wherein: The load testing mechanism includes a pressing mechanism (17) fixedly connected with a movable end of the load parking assembly (1401) through a load testing clamp (16), and a force sensor (15) is connected between the pressing mechanism (17) and the load testing clamp (16) and between the load testing clamp (16) and the load parking assembly (1401), and the pressing mechanism (17) is connected with the output end of the motor pump group (3) through hydraulic pressure for pressing.

4. The electro-hydraulic parking test system of claim 3, wherein: The pressing mechanism (17) is also connected with a proportional overflow valve (9), a reversing valve (19), and a speed regulating valve (18) between the output end of the motor pump group (3).

5. The electro-hydraulic parking test system of claim 3, wherein: The oil pressure monitoring sensors (12) and the oil flow sensors (13) are respectively arranged between the pressing mechanism (17) and the output end of the motor pump group (3) and between the load parking assembly (1401) and the corresponding pressure reducing valve (11).

6. The electro-hydraulic parking test system of claim 3, wherein: An accumulator (10) is further arranged between the pressing mechanism (17) and the output end of the motor pump group (3).

7. The electro-hydraulic parking test system of claim 1, wherein: A coarse filter (2) is arranged between the oil tank (1) and the motor pump group (3) and on the hydraulic oil circuit of the oil tank (1), a one-way valve (4) is connected with the outlet of the motor pump group (3), and a fine filter (5) is connected with the outlet of the one-way valve (4).

8. The electro-hydraulic parking test system of claim 1, wherein: A temperature sensor (7) and a liquid level sensor (6) are arranged in the oil tank (1).

9. The electro-hydraulic parking test system of claim 1, wherein: The active end of the durable parking assembly (1402) and several other parking assemblies (1403) is fixed with an empty load test clamp (22), and the oil pressure monitoring sensor (12) is arranged between the durable parking assembly (1402) and its corresponding pressure reducing valve (11), and the oil pressure monitoring sensor (12) and the stop valve (21) are arranged between several other parking assemblies (1403) and their corresponding pressure reducing valves (11).

Images