• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A pump having a limited maximum output pressure is alternately connected to a steering control valve and a pressure storage reservoir charged by the pump under control of a signal pressure operated valve to supply fluid under the maximum pump pressure to a steering servomotor only under high loading conditions. The storage pressure is limited to a value less than the maximum pump pressure to influence operation of the signal pressure operated valve and operate the servomotor under low load conditions.
    公开号:SU867326A3
    申请号:SU782659948
    申请日:1978-09-13
    公开日:1981-09-23
    发明作者:Де Майгт Винфрид
    申请人:Цанрадфабрик Фридрихсхафен Аг (Фирма)；
    IPC主号:
    专利说明:

    Distributor 7 is communicated with additional hydroline 11 with hydrolic 6, and cavity 8 is communicated with hydroline 12 at cavities 13 and 14 of the servomotor 2 through valve 15 with the logical function OR. Pump 1 communicates with distributor 3 via non-return valve 16, and accumulator 4 through non-return valve 17. Suction hydroline 18 of pump 1 communicates with tank 19 for working fluid through choke 2 which is the maximum pressure limiter, accumulator 4 communicates with tank 19 through the safety valve 21.
    The device 20 is set to a maximum working pressure, for example 180 bar, and a valve 21 to a lower pressure, for example 60 bar.
    The system works as follows.
    With increasing pressure in one of the cavities 13 or 14 of the servomotor to the magnitude of the charging pressure of the battery 4, the distributor 4 under the action of the total force from the spring 9 and the pressure transmitted from the servomotor 2 through the hydroline 12, moves to its right position, connecting the pump 1 s the servomotor 2 through the check valve 16 and the distributor 3. Moreover, the distributor 7 at the expense of the force of the spring 9 moves to the specified position before the pressure in the servomotor 2 is equal with the pressure of the accumulator 4. At the same time, the valve 16 is closed. The spring 9 transfers the distributor 7 to this position and in the absence of pressure in the system.
    When the pressure in the servomotor 2 drops, the valve 16 under the effect of the pressure of the fluid from the accumulator 4 opens and reports the latter on the hydroline 11 with the cavity 10 of the control of the distributor 7. The latter
    moves to the left position, together the pump 1 with the battery 4. The servomotor 2 operates from the battery 4 at low pressure.
    Thus, unproductive power losses do not occur in the system when the transport vehicle is operating at high speeds, which increases the efficiency of the system.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A hydraulic system for controlling vehicles, containing a pump, communicated with a servomotor through a three-position four-line steering wheel-controlled valve with a closed center, and with a pneumohydraulic accumulator through a non-return valve, and a two-position hydraulically-controlled valve, the spool of which is spring-loaded from one of the control cavities and, on the other hand, it is communicated with an additional hydroline with a pressure hydroline of the pump, in contrast to the fact that, for the purpose of increasing the efficiency, The distributor is made four-line and is installed between the pump and the three-position four-line distributor to communicate the latter in one of its positions with the pump, and the other - the pump with the battery, the control cavity on the side of the spring-loaded end of the two-position distributor communicating with the servomotor cavity through an additionally installed valve with logical function OR.
    Sources of information taken into account in the examination 1. Bogdanovich L, B. Volumetric hydraulic actuators. Kiev, Technique 1971, p. 164, fig. 106
    类似技术:
    公开号 | 公开日 | 专利标题
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    CN114183486A|2022-03-15|Liquid filling valve group, brake control system and agricultural machine with liquid filling valve group and brake control system
    SU1002686A1|1983-03-07|Hydraulic drive
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    SU981713A1|1982-12-15|Electrohydraulic servodrive
    SU1041325A1|1983-09-15|Hydraulic drive of vehicle
    SU1527070A1|1989-12-07|Vehicle hydraulic system
    SU806910A1|1981-02-23|Pneumohydraulic drive
    DE3138307A1|1982-04-29|Electric vehicle, in particular stacking vehicle
    同族专利:
    公开号 | 公开日
    DD139349A5|1979-12-27|
    GB2004513B|1982-01-27|
    JPS5451133A|1979-04-21|
    ES473082A1|1979-04-16|
    FR2403922B3|1981-05-08|
    IT1106766B|1985-11-18|
    IT7850939D0|1978-09-01|
    FR2403922A1|1979-04-20|
    DE2742688A1|1979-04-05|
    SE7809897L|1979-03-23|
    US4204584A|1980-05-27|
    GB2004513A|1979-04-04|
    SE430046B|1983-10-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1951771U|1965-04-15|1966-12-15|Daimler Benz Ag|CONNECTOR FOR TWO PRESSURE PIPES WITH AT LEAST ONE CONTROL PIPE.|
    US3841095A|1973-04-26|1974-10-15|Weatherhead Co|Motor vehicle fluid power circuit|
    US3882952A|1973-10-26|1975-05-13|Caterpillar Tractor Co|Steering system with secondary steering means|
    US3964260A|1975-05-27|1976-06-22|Towmotor Corporation|Energy conservation apparatus for an electric vehicle|DE2931240C2|1979-08-01|1987-01-29|Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen, De|
    JPS56162935U|1980-05-09|1981-12-03|
    WO1984003674A1|1983-03-23|1984-09-27|Zahnradfabrik Friedrichshafen|Hydraulic servo-steering for motor vehicles|
    SU1230906A1|1983-06-22|1986-05-15|Московское научно-производственное объединение по строительному и дорожному машиностроению|United hydraulic system for steering control and extra user on vehicle |
    DE3410033A1|1984-03-19|1985-09-26|Alfred Teves Gmbh, 6000 Frankfurt|DEVICE FOR HYDRAULIC ASSISTANCE OF THE STEERING FORCE|
    US4630441A|1984-09-04|1986-12-23|The Boeing Company|Electrohydraulic actuator for aircraft control surfaces|
    DE3613689C2|1986-04-23|1988-12-08|Gesellschaft Fuer Hydraulik-Zubehoer Mbh, 6603 Sulzbach, De|
    US4915186A|1988-10-25|1990-04-10|Deere & Company|Hydraulic steering systems dampening devices|
    US5022481A|1990-01-30|1991-06-11|Carter Daniel C|Emergency power steering backup apparatus and method|
    US5017099A|1990-05-04|1991-05-21|Regents Of The University Of Minnesota|Fluid regulator valve|
    DE4335390B4|1993-10-16|2007-04-12|Trw Fahrwerksysteme Gmbh & Co Kg|Power steering device|
    US5975232A|1996-01-18|1999-11-02|Unisia Jecs Corporation|Power assisted steering apparatus for automotive vehicle|
    DE19735647C1|1997-08-16|1999-02-25|Trw Fahrwerksyst Gmbh & Co|Hydraulic fluid control for hydraulic servo steering device|
    EP2539206A4|2010-02-27|2014-03-12|R H Sheppard Co Inc|Hydraulic power steering system|
    CN101954969A|2010-09-21|2011-01-26|南京航海仪器二厂有限公司|Oil supply system for hydraulic steering engine|
    JP6519203B2|2015-01-30|2019-05-29|株式会社タダノ|Hydraulic circuit structure and work vehicle|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19772742688|DE2742688A1|1977-09-22|1977-09-22|HYDRAULIC POWER STEERING WITH POWER SUPPLY DEVICE WITH PRESSURE ACCUMULATOR|
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