CN102636357B - Test bed for steering system of electro-hydraulic servo automobile - Google Patents

Test bed for steering system of electro-hydraulic servo automobile Download PDF

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Publication number
CN102636357B
CN102636357B CN201210131241.0A CN201210131241A CN102636357B CN 102636357 B CN102636357 B CN 102636357B CN 201210131241 A CN201210131241 A CN 201210131241A CN 102636357 B CN102636357 B CN 102636357B
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CN
China
Prior art keywords
steering
output unit
hydraulic servo
steering moment
electro
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CN201210131241.0A
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Chinese (zh)
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CN102636357A (en
Inventor
庞国栋
王旭东
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济南东测试验机技术有限公司
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Publication of CN102636357A publication Critical patent/CN102636357A/en
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Publication of CN102636357B publication Critical patent/CN102636357B/en

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Abstract

The invention discloses a test bed for a steering system of an electro-hydraulic servo automobile. The test bed comprises a testing machine main body, an electro-hydraulic servo control system and a power pump station which provides hydraulic power for the testing machine main body, wherein the testing machine main body comprises a steering torque loading device, a steering device to be detected, a steering torque output device and an axle fixed mount; and both the steering torque loading device and the steering torque output device are provided with a hydraulic servo driving device and a parameter detection device which are in signal connection with the electro-hydraulic servo control system. The test bed has the beneficial effects that: the entire steering system of the automobile can be comprehensively tested in a test room, various test conditions of a real automobile test are completely imitated, the time and labor are saved, and the detection is comprehensive and accurate.

Description

Electro-hydraulic servo car conversion system testing table
Technical field
The present invention relates to a kind of electro-hydraulic servo car conversion system testing table is mainly used in the performance test of automobile power steering system assembly, fail-test and automobile power steering system is carried out to compbined test.
Background technology
Automobile steering system is paid attention to by automobile industry all kinds of research and development manufacturing enterprise and mechanism all the time, its technology by mechanical type turn to, fluid-link steering, electric-controlled hydraulic turn to, and progressively towards the development of electric power steering and follow-on steering-by-wire, become in recent years system synthesis one with the fastest developing speed in automobile technical field.
Automobile steering system is to guarantee that automobile carries out Turning travel to keep stable vitals according to driver's will, the quality of its performance directly has influence on security and the control stability of running car, thus the experiment of performance of automotive steering system for the determining of steering gear design parameter, steering mechanism's size determine and the reliability of steering behaviour all tool be of great significance.
At present, the test of automobile power steering system assembly is mainly to rely on real vehicle check, hydraulic power steering system assembly is arranged on required vehicle, the various performances of measured automobiles hydraulic power steering system assembly in actual motion, can not be placed on testing laboratory and carry out, therefore detect to get up to waste time and energy.Even if there are some relevant projects to carry out in testing laboratory, be also some parts of only having measured steering, as the performance of steering gear, cannot test the combination property of whole automobile power steering system.
Summary of the invention
For solving above technical deficiency, the invention provides a kind of can completing in laboratory, time saving and energy saving, the electro-hydraulic servo car conversion system testing table that efficiency is high.
The present invention is achieved by the following measures:
Electro-hydraulic servo car conversion system testing table of the present invention, comprise testing machine main body, electrohydraulic servo-controlling system and for testing machine main body provides the power pump station of hydraulic power, described testing machine main body comprises steering moment charger, steering gear to be checked, steering moment output unit and vehicle bridge fixed mount;
Described steering moment charger comprises adjusting pole, is provided with simulation bearing circle on described adjusting pole, and described simulation bearing circle is connected with steering axle, and described steering axle connects steering gear to be checked;
Described steering moment output unit comprises base and oscillating cylinder, and steering moment output unit can be arranged on steering and detect station and steering gear detection station;
When steering moment output unit is arranged on steering gear detection station, described oscillating cylinder level connection joint is on base, and the torsion shaft of oscillating cylinder directly connects the output shaft of steering gear to be checked by shaft coupling;
When steering moment output unit is arranged on steering detection station, steering moment output unit is two and is separately positioned on vehicle bridge fixed mount two ends, on described base, be connected with vertical bracing frame, oscillating cylinder is connected on bracing frame, on described vehicle bridge fixed mount, be fixed with vehicle bridge to be checked, steering gear to be checked connects the wheel hub of vehicle bridge to be checked by steering gear, wheel hub top connects the oscillating cylinder that the steering moment that imposes on wheel hub is converted into torsional moment;
Described steering moment charger is provided with steering moment output unit hydraulic servo driving and the parameter detection device being connected with electrohydraulic servo-controlling system signal.
On above-mentioned adjusting pole, be provided with right-left adjusting device, height adjuster, leveling device, front-rear adjusting device and dip angle regulating device, on the base of described steering moment output unit, be provided with right-left adjusting device.
Above-mentioned hydraulic servo driving comprises servo motor, electrohydraulic servo valve is set on servo motor, parameter detection device comprises photoelectric encoder and torque sensor, electrohydraulic servo valve, torque sensor and photoelectric encoder are connected electrohydraulic servo-controlling system, and described torque sensor loads the output torque that turns to of moment of torsion and steering moment output unit for detection of turning to of steering moment charger.
Above-mentioned when steering moment output unit is arranged on steering detection station, the top, wheel junction of described wheel hub is connected with web joint, and described web joint connects the torsion shaft of oscillating cylinder by shaft coupling.
Above-mentioned electrohydraulic servo-controlling system comprises three-channel digital hydraulic servo tuning controller, and its three passages are respectively used to control the hydraulic servo driving of steering moment charger and two steering moment output units.
The invention has the beneficial effects as follows:
1. can in testing laboratory, complete whole automobile steering system is carried out to integration test, simulate the various Test condition of real train test completely, time saving and energy saving, detect comprehensively accurately.2. realized steering gear output shaft has directly been carried out to moment of torsion loading, reduced the interference of transmission link loss factor, be conducive to directly test the parameter of steering gear.3. can real time modelling people beat the moment of torsion of action and the generation of bearing circle, realize, from input end, whole steering is carried out to fatigue loading, test more comprehensive.4. electrohydraulic servo-controlling system control channel is many, can coordinate to load, and operating frequency range is wide, is applicable to moving Static Detection.
accompanying drawing explanation
Fig. 1 is the plan structure schematic diagram of steering moment output unit of the present invention when steering detects station;
Fig. 2 is the main TV structure schematic diagram of steering moment output unit of the present invention when steering detects station;
Fig. 3 is the main TV structure schematic diagram of steering moment charger of the present invention;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the main TV structure schematic diagram of steering moment output unit of the present invention;
Fig. 6 is the left TV structure schematic diagram of Fig. 5;
The main TV structure schematic diagram of Fig. 7 steering moment output unit of the present invention when steering gear detects station.
In figure: 1 steering moment charger, 2 steering gears to be checked, 3 steering moment output units, 4 vehicle bridge fixed mounts, 5 simulation bearing circle, 6 steering axles, 7 power pump stations, 8 pitman arms, 9 steering drag links, 10 vehicle bridge to be checked, 11 track rods, 12 adjusting poles, 13 wheel hubs, 14 web joints, 15 shaft couplings, 16 servo motors, 17 photoelectric encoders, 18 electrohydraulic servo valves, 19 torque sensors, 1-1 right-left adjusting device, 1-2 height adjuster, 1-3 leveling device, 1-4 front-rear adjusting device, 1-5 dip angle regulating device, 3-1 base, 3-2 line slideway, 3-3 bracing frame, 3-4 oscillating cylinder, 3-5 right-left adjusting device.
Embodiment
As shown in Fig. 1-7, electro-hydraulic servo car conversion system testing table of the present invention, comprise testing machine main body, electrohydraulic servo-controlling system and for testing machine main body provides the power pump station 7 of hydraulic power, testing machine main body comprises steering moment charger 1, steering gear to be checked 2, steering moment output unit 3 and vehicle bridge fixed mount 4.
Steering moment charger 1, comprises adjusting pole 12, is provided with simulation bearing circle 5 on adjusting pole 12,
Simulation bearing circle is connected with steering axle 6, and steering axle 6 connects steering gear 2 to be checked; Simulation bearing circle 5 connects steering axle 6 by shaft coupling 15, and is provided with torque sensor 19.Simulation bearing circle 5 is provided with hydraulic servo driving, hydraulic servo driving adopts servo motor 16, electrohydraulic servo valve 18 and photoelectric encoder 17 are set on servo motor 16, servo motor 16, torque sensor 19, electrohydraulic servo valve 18 and photoelectric encoder 17 are connected electrohydraulic servo-controlling system, realize the closed-loop control that simulation bearing circle 5 loads steering moment, control more accurate.
On adjusting pole 12, be provided with right-left adjusting device 1-1, height adjuster 1-2, leveling device 1-3, front-rear adjusting device 1-4 and dip angle regulating device 1-5, can, according to adjusting under different work condition states, meet the installation needs of different steering drive axle assemblies, steering universal joint assembly and steering assembly.
Steering moment output unit 3 comprises base 3-1 and oscillating cylinder 3-4, steering moment output unit 3 energy
Enough be arranged on steering and detect station and steering gear detection station.When steering moment output unit 3 is arranged on steering gear detection station, only steering gear performance parameter is detected.Now oscillating cylinder 3-4 level connection joint is on base 3-1, and the torsion shaft of oscillating cylinder 3-4 directly connects the output shaft of steering gear 2 to be checked by shaft coupling 15.Realized like this steering gear output shaft has directly been carried out to moment of torsion loading, reduced the interference of transmission link loss factor, be conducive to directly test the parameter of steering gear.
When steering moment output unit 3 is arranged on steering detection station, can detect whole steering performance parameter.Now steering moment output unit 3 adopts two, and be separately positioned on vehicle bridge fixed mount 4 two ends, on base 3-1, be connected with vertical bracing frame 3-3, oscillating cylinder 3-4 is connected on bracing frame 3-3, on vehicle bridge fixed mount 4, be fixed with vehicle bridge 10 to be checked, steering gear 2 to be checked connects the wheel hub 13 of vehicle bridge 10 to be checked by steering gear, steering gear can adopt pitman arm 8, steering drag link 9 and the track rod 11 connecting successively, and track rod 11 two ends are connected on the wheel hub 13 of vehicle bridge 10 to be checked.Wheel hub 13 tops, wheel junction connect web joint 14, and web joint 14 connects the torsion shaft of oscillating cylinder 3-4 by shaft coupling 15, thereby oscillating cylinder 3-4 can be converted into torsional moment by the steering moment that imposes on wheel hub 13.Vehicle bridge fixed mount 4 maintains static vehicle bridge 10 to be checked in process of the test, and the required rigidity requirement of warranty test.
On the torsion shaft of oscillating cylinder 3-4, be provided with torque sensor 19.Oscillating cylinder 3-4 is provided with hydraulic servo driving, hydraulic servo driving adopts servo motor 16, electrohydraulic servo valve 18 and photoelectric encoder 17 are set on servo motor 16, servo motor 16, torque sensor 19, electrohydraulic servo valve 18 and photoelectric encoder 17 are connected electrohydraulic servo-controlling system, realize the closed-loop control of the output steering moment of oscillating cylinder 3-4 simulation, control more accurate.
In order to make the fixedly vehicle bridge of different model of vehicle bridge fixed mount 4, right-left adjusting device 3-5 has been installed on base 3-1, right-left adjusting device 3-5 adopts screw-nut mechanism and line slideway 3-2, adjusts the distance that is connected between oscillating cylinder 3-4 and wheel hub 13.The axial deformation of effective compensation vehicle bridge, it is reliable that warranty test platform carries out high pulling torque experimental safe.During operation, manual operation handwheel just can, easy to use.
Electrohydraulic servo-controlling system has adopted the digital hydraulic servo tuning controller of triple channel, and a passage is for controlling the hydraulic servo driving of steering moment charger 1; Second passage is for controlling the hydraulic servo driving of left side steering moment output unit 3; The 3rd passage is for controlling the hydraulic servo driving of right hand steering moment output unit 3.The processing that the digital hydraulic servo coordinated control system of triple channel is testing crew, tested sample, test data is with safety and to the expansion of pilot system function, provide reliable assurance in the future, and reduces to greatest extent the demand to plant maintenance by abundant software systems flexibly.Select the actual condition of the servo torsion actuator of two covers simulated automotive left and right turn wheel.A plurality of passages are coordinated to control by a set of digital hydraulic servo controller, each passage has respectively power/moment of torsion, two close loop control circuits of displacement/angle, have etc. speed test force, etc. speed test torque, etc. speed displacement, etc. the various control patterns such as speed angular displacement, and the level and smooth unperturbed that can realize control model switches.
Electrohydraulic servo-controlling system has following characteristics: 1. adopt the totally digitilized servo-hydraulic controller of state-of-the-art technology, this control system has adopted high speed gpib interface, realizes the high speed data transfer of 8M/s; 2. there are colourful application software, external member available.These external members can meet all kinds of test demands.And the design of these softwares has consistance, user can grasp the use of various external members in a short period of time; 3. control system provides the most perfect defencive function.This controller is given full play to the various characteristics of hardware, firmware and software.All safety guarantee function realize completely in the most reliable medium-hardware.In firmware, can realize real-time prioritization function, as spacing, event, PIDL loop, cross compensation, data recording, amplitude control, adaptive control, filtering and cycle count etc., can guarantee execution within the shorter response time.Software provides the functions such as test definition, data-storing, analysis and demonstration; 4. the demarcation guidance system guides user of controller is carried out automatic Calibration or is carried out in more detail manual demarcation; Controller taked dynamic test control and data acquisition aspect the technology of state-of-the-art raising quality and precision.As: adaptive control, the setting of automatic loop waveform and amplitude control etc., the fully accuracy of warranty test and data; 6. guidance panel can provide the immediate feedback that current test arranges.Can immediately understand and spacingly whether start and test the status informations such as residing control model, and can in form, check real-time load, position and strain regime, circulation sum, warning and rub-out signal and out of Memory etc.; 7. the software systems of control system fast and flexible can meet testing requirements widely.Application software adopts minimum interfaces windows to realize the demonstration of required whole work.All data, figure and numeral etc. can exchange with other Windows program, the form of user creatable personalization; 8. the high resolving power feedback sample of controller and Signal Regulation technology are brought up to a new level by the quality of data of digital servo controller.Whole process is stepping measuring technique not, and guaranteed has accurately repeatably measurement data within the scope of whole transducer range; 9. controller is easy to expansion, facilitates user again to drop in the future upgrading.And can increase new control channel along with the continuous growth of user trial demand, to protect user's investment; 10. it is worth mentioning that controller can accept 20Duo Zhong road spectrum form, for the road analogy of testing machine steps into substantial period, for scientific research institution provides fact basis.In the lead nation, testing machine industry enters the brand-new Road Simulation Test stage.
Power pump station 7 has been realized the performance of simulation steering under uniform temperature, flow, pressure, effectively
Measure the various performances of steering.Power pump station 7 has following characteristics: 1. pumping plant has configured flow system flow measuring system and internal leakage test macro, is respectively used to the internal leakage of measuring system flow and steering assembly.By the electro connecting pressure gauge on pumping plant panel, according to set pressure, automatically change, measurement result shows by being arranged on flow tester on panel.In pumping plant internal configurations flow calibrating device, can regularly to flow testing system, carry out precision calibration.Flow system flow size can be adjusted by the throttling valve being arranged on pumping plant front panel.System top pressure is adjusted by the surplus valve knob being arranged on front panel.2. system fuel tank internal has been installed tube heater, and tubular cooler has been installed in fuel tank side, opens or stop, control the oil temperature that opens or closes automatic control system of electromagnetism cooling water valve by being arranged on temperature controller control heater on front panel.
Testing table is the actual condition of simulated automotive steering effectively, property indices to steering under the condition of simulated automotive steering actual condition detects, be not only the testing equipment that steering is carried out to quality testing, can provide for the development of automobile steering system essential test figure simultaneously.
Described in above-described embodiment, be to illustrate this patent; though describe by specific term in literary composition; but can not limit with this protection domain of this patent; the personage who is familiar with this technical field can change or revise it and reach equivalent object after understanding the spirit of this patent and principle; and this equivalence change and modification all should be covered by claim scope and define in category.

Claims (5)

1. an electro-hydraulic servo car conversion system testing table, comprise testing machine main body, electrohydraulic servo-controlling system and for testing machine main body provides the power pump station of hydraulic power, it is characterized in that: described testing machine main body comprises steering moment charger, steering gear to be checked, steering moment output unit and vehicle bridge fixed mount;
Described steering moment charger comprises adjusting pole, is provided with simulation bearing circle on described adjusting pole, and described simulation bearing circle is connected with steering axle, and described steering axle connects steering gear to be checked;
Described steering moment output unit comprises base and oscillating cylinder, and steering moment output unit can be arranged on steering and detect station and steering gear detection station;
When steering moment output unit is arranged on steering gear detection station, described oscillating cylinder level connection joint is on base, and the torsion shaft of oscillating cylinder directly connects the output shaft of steering gear to be checked by shaft coupling;
When steering moment output unit is arranged on steering detection station, steering moment output unit is two and is separately positioned on vehicle bridge fixed mount two ends, on described base, be connected with vertical bracing frame, oscillating cylinder is connected on bracing frame, on described vehicle bridge fixed mount, be fixed with vehicle bridge to be checked, steering gear to be checked connects the wheel hub of vehicle bridge to be checked by steering gear, wheel hub top connects the oscillating cylinder that the steering moment that imposes on wheel hub is converted into torsional moment;
Described steering moment charger is provided with steering moment output unit hydraulic servo driving and the parameter detection device being connected with electrohydraulic servo-controlling system signal.
2. electro-hydraulic servo car conversion system testing table according to claim 1, it is characterized in that: on described adjusting pole, be provided with right-left adjusting device, height adjuster, leveling device, front-rear adjusting device and dip angle regulating device, on the base of described steering moment output unit, be provided with right-left adjusting device.
3. electro-hydraulic servo car conversion system testing table according to claim 1, it is characterized in that: described hydraulic servo driving comprises servo motor, electrohydraulic servo valve is set on servo motor, parameter detection device comprises photoelectric encoder and torque sensor, electrohydraulic servo valve, torque sensor and photoelectric encoder are connected electrohydraulic servo-controlling system, and described torque sensor loads the output torque that turns to of moment of torsion and steering moment output unit for detection of turning to of steering moment charger.
4. electro-hydraulic servo car conversion system testing table according to claim 1, it is characterized in that: when steering moment output unit is arranged on steering detection station, the top, wheel junction of described wheel hub is connected with web joint, and described web joint connects the torsion shaft of oscillating cylinder by shaft coupling.
5. electro-hydraulic servo car conversion system testing table according to claim 1, it is characterized in that: described electrohydraulic servo-controlling system comprises three-channel digital hydraulic servo tuning controller, its three passages are respectively used to control the hydraulic servo driving of steering moment charger and two steering moment output units.
CN201210131241.0A 2012-05-02 2012-05-02 Test bed for steering system of electro-hydraulic servo automobile CN102636357B (en)

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CN102980763B (en) * 2012-11-28 2015-06-03 重庆理工大学 Test method for automotive transmission dynamo-static coupling torsional fatigue
CN104374565B (en) * 2014-11-28 2017-03-08 济南瑞晟机械有限公司 A kind of electo hydraulic servocontrolled fatigue testing machine
CN105445040B (en) * 2016-01-06 2019-01-22 福州大学 It is a kind of for testing the experimental stand of multiple-axle vehicle steering behaviour
CN107024360A (en) * 2016-02-01 2017-08-08 宁波考比锐特汽车科技有限公司 A kind of all hydraulic pressure steering-gear performance test stand
CN107702928B (en) * 2017-09-26 2019-06-28 吉林大学 A kind of pivoted wheels on vehicle corner measuring apparatus and method
CN109080696A (en) * 2018-06-07 2018-12-25 奇瑞汽车股份有限公司 The protective device and wire-controlled steering system of wire-controlled steering system

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