• 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 hydrostatic steering controller including a pair of valve members which are relatively movable in opposite directions from a neutral position to a pair of operating positions to control flow between a fluid pressure source and a hydraulic steering motor. In each of the operating positions the valve members include interfacing surfaces which define part of a first passage directing high pressure fluid to the steering motor and a second passage directing low pressure fluid from the steering motor to a reservoir. The interfacing surfaces of the valve members create a pressure dam between the first and second passages when the valve members are relatively moved by a predetermined amount away from the neutral position and to an operating position. The pressure dam minimizes leakage between the first and second passages. The pressure dam is created in a pressure dam groove formed in a surface of one of the valve members. The pressure dam groove is connected with the fluid pressure source, and is disposed in facing relationship with a low pressure return groove formed in a surface in the other valve member when the valve members are in their neutral position. When the valve members move to their operating position a surface on the other valve member moves into facing relation with the pressure dam groove, thus increasing the pressure in the pressure dam groove.
    公开号:SU1268109A3
    申请号:SU792818044
    申请日:1979-09-21
    公开日:1986-10-30
    发明作者:Пол Робертс Маурис
    申请人:Трв Инк (Фирма)；
    IPC主号:
    专利说明:

    I1
    FIELD OF THE INVENTION The invention relates to mechanical engineering, in particular to hydraulic control valves of a steering system of a vehicle.
    The aim of the invention is to increase reliability.
    FIG. 1 shows a hydraulic distributor, longitudinal section; FIG. 2, section A-A, FIG. one.
    The valve includes a housing 1 with a pressure valve 2, a drain 3 and communication channels 4 and 5, a dispenser 6 installed in it, formed by two rotary elements 7 and 8, and a control valve 9 containing two valve elements in the form of bushings 10 and 11 with longitudinal distribution grooves 12 and 13, made respectively on the outer 14 and inner 15 surfaces of the sleeves 10 and. 11, concentrically mounted with the possibility of their relative rotation and placed in the housing 1 with the formation of a pressure 16, a drain 17 and a communication 18 and 19 cavities, respectively, connected to the distribution grooves 12 and 13. On the inner surface 15 of the outer sleeve 10; two connected to the pressure cavity 16 by holes 20 and 21 with regulating elements 22 and 23 additional kiasasa 24 and 25, communicated with the drain distribution grooves of the inner sleeve 11 in the neutral position of the distributor and separated from them in the working positions of the distributor. In addition, an output shaft 26 connected to the steering wheel 27 is installed in the distributor. The communication cavities 18 and 19 communicate with the hydraulic motor 28 of the steering. The output shaft 26 is connected to the bushing 11 of the control valve 9 by an articulated kinematic transmission 29, with the pressure chamber 16 communicating with the pump 30, and the drain cavity 17 with the drain tank 31.
    The valve works as follows.
    When steering is not required, the valve members 10 and 11 are in the neutral position. After turning the steering wheel 27 in any direction, the valve element 11 is rotated relative to the valve element 10. In each of the working positions, the working fluid from the pump 30 is in dispenser 6 and then
    092
    in one of the cavities of the motor 28, and from the other cavity of the motor 28 in the drain tank 31.
    The valve elements 10 and 11 control the flow of the working fluid, distributing it between the pump 30, the hydraulic motor 28 and the drain tank 31.
    The proposed design of the distributor reduces leakage of the working fluid by creating a pressure barrier between the distribution slots 12 and 13 communicated with the pressure 16 and the drain 17 cavities of the hydraulic distributor.
    When the valve member 11 is rotated clockwise from the neutral position, the valve members 10 and 11 are in the working position. The working fluid from the pump 30 through the combined distribution grooves 12 and 13 is fed into the dispenser 6 and then into one of the cavities of the motor 28, and along the opposite distribution grooves from the other cavity of the motor 28 through the dispenser 6 into the drain tank 31. In this position, the outer surface of the valve element 11 closes additional grooves 24 and 25, communicated by holes 20 and 21 with regulating elements 22 and 23 with a pressure cavity 16, therefore the static pressure in the slots 24 and 25 quickly increases to a pressure of the head and prevents the dosage from leaking The flow of the working fluid from the pressure cavity 16 into the drain cavity 17 through the contacting surfaces of the valve elements 10 and 11.
    During the initial movement of the valve elements 10 and 11 relative to each other from the neutral position, the grooves 24 and 25 are not blocked by the outer surface of the sleeve 11, the pressure in the pressure cavity increases and presses the regulating elements 22 and 23 tightly against the walls of the holes 20 and 21, which ensures minimal flow working fluid through the slots 24 and 25.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    The valve, comprising a housing with a pressure, a drain, and two communication channels, a dispenser installed in it and a control valve containing two valve elements, are made in the form of bushings with longitudinal distribution grooves placed respectively 3 on the outer and inner surfaces of the bushings concentrically mounted with the possibility of their relative rotation and placed in the housing with the formation of pressure, drain and communication cavities, respectively, connected to the distribution grooves , in order to increase reliability, on the inner top of the outer sleeve, there are at least two additional grooves connected to the pressure cavity with the regulating elements and provided with the drain distributor and the inner sleeve slots in the neutral position of the distributor and disconnected from mentioned slots in the working positions of the distributor.
    /
    U,
    ut. , / / 13 15 74
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1268109A3|1986-10-30|Hydraulic control valve
    US4665695A|1987-05-19|Hydrostatic load sense steering system
    US3819307A|1974-06-25|Stability means for a controller for fluid pressure operated devices
    US4565115A|1986-01-21|Hydraulic distributor for assistance power motor with return to rest position
    US4594936A|1986-06-17|Hydraulic distributor for a servomechanism with reaction on the input component
    US3606819A|1971-09-21|Power steering gear assembly
    US4461321A|1984-07-24|Rotary hydraulic distributor for hydraulic power-drive systems
    US4804016A|1989-02-14|Fluid controller with improved pressure balancing
    US4488569A|1984-12-18|Apparatus with staged pressure differential for controlling fluid flow
    US3020890A|1962-02-13|Pump control valve with bypass
    US3584985A|1971-06-15|Hydrostatic control equipment particularly for steering systems
    US3446021A|1969-05-27|Power steering unit with poppet directional control valves
    SU695544A3|1979-10-30|Hydraulic booster for a steering system of a vehicle
    US4776418A|1988-10-11|Four wheel steering having closed hydraulic system with pressure control assembly
    SU1090268A3|1984-04-30|Rotary hydraulic pilot directional valve
    US4184332A|1980-01-22|Hydrostatic two-circuit steering arrangement
    US3508467A|1970-04-28|Power steering gear
    US4576003A|1986-03-18|Hybrid load-sense vehicle hydrostatic steering system
    US2828641A|1958-04-01|Power steering device
    US5330024A|1994-07-19|Steering force control apparatus for power steering system
    US4830128A|1989-05-16|Four wheel steering having closed hydraulic system with pressure relief
    US4415002A|1983-11-15|Hydraulic control apparatus
    US4275996A|1981-06-30|Control device for adjustable fluid pumps or motors
    US3748062A|1973-07-24|Self energizing valve means for fluid translating device
    SU1090269A3|1984-04-30|Rotary hydraulic pilot directional valve
    同族专利:
    公开号 | 公开日
    FR2436701A1|1980-04-18|
    DK395179A|1980-03-23|
    BR7906009A|1980-06-03|
    JPS6312837B2|1988-03-22|
    CA1141264A|1983-02-15|
    JPS5555060A|1980-04-22|
    DE2938271A1|1980-03-27|
    GB2032362A|1980-05-08|
    DK150408B|1987-02-23|
    IT1123271B|1986-04-30|
    GB2032362B|1982-09-15|
    US4311171A|1982-01-19|
    FR2436701B1|1984-05-11|
    IT7925910D0|1979-09-21|
    DE2938271C2|1984-01-19|
    DK150408C|1987-10-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3385057A|1964-08-25|1968-05-28|Trw Inc|Hydraulic controller|
    US3246472A|1964-12-21|1966-04-19|Int Harvester Co|Hydraulic servo system for power steering|
    US3380350A|1965-10-22|1968-04-30|Midwest Gage Co Inc|Rotating air cylinder utilizing air as air seal|
    GB1151524A|1966-07-21|1969-05-07|Trw Inc|Improvements in or relating to Fluid Controllers|
    US3600893A|1970-02-16|1971-08-24|Trw Inc|Hydraulic device having pressure dam valve means|
    JPS4927811A|1972-07-11|1974-03-12|
    US3895888A|1973-10-19|1975-07-22|Trw Inc|Hydrostatic control unit|
    US3906837A|1973-12-27|1975-09-23|Richard H Sheppard|Power steering gear with torsion rod valve centering mechanism|
    GB1524707A|1974-09-18|1978-09-13|Eaton Corp|Controller for fluid pressure operated devices|
    US4164892A|1976-12-22|1979-08-21|Trw Inc.|Control apparatus|
    US4159723A|1978-02-03|1979-07-03|Danfoss A/S|Control device for steering apparatus or the like|EP0083490A3|1981-12-31|1984-05-02|Adwest Engineering Limited|Rotary valve for a power assisted steering mechanism|
    DE3376104D1|1982-10-29|1988-05-05|Trw Inc|Hybrid load sense vehicle hydrostatic steering system|
    US4475440A|1982-11-15|1984-10-09|Trw Inc.|Power steering control apparatus|
    US4558720A|1983-03-17|1985-12-17|Eaton Corporation|Closed-center controller for use with unequal area cylinder|
    US4570736A|1985-01-07|1986-02-18|Ford Motor Company|Dual flow variable assist power steering gear mechanism|
    JPS63283042A|1987-05-14|1988-11-18|Fuji Electric Co Ltd|Semiconductor element|
    US4838145A|1987-06-18|1989-06-13|The United States Of America As Represented By The Secretary Of Commerce|Multiple actuator hydraulic system and rotary control valve therefor|
    US4804016A|1988-06-09|1989-02-14|Eaton Corporation|Fluid controller with improved pressure balancing|
    US5101860A|1991-09-30|1992-04-07|Eaton Corporation|Fluid controller and improved check valve arrangement therefor|
    DE19737253C2|1997-08-27|2000-11-30|Danfoss Fluid Power As Nordbor|Hydraulic control device|
    DE19755633B4|1997-12-15|2008-06-19|Thyssenkrupp Presta Steertec Gmbh|Rotary slide valve with noise-reducing control grooves and method and grinding wheel for its production|
    US6033195A|1998-01-23|2000-03-07|Eaton Corporation|Gerotor motor and improved spool valve therefor|
    DE202005007092U1|2005-05-03|2005-08-11|Trw Automotive Gmbh|Rotary disc valve especially for hydraulic servo steering systems in motor vehicles has rotary disc provided with at least two different control geometries|
    RU2468262C2|2010-07-15|2012-11-27|Открытое акционерное общество "Павловский машиностроительный завод ВОСХОД" - ОАО "ПМЗ ВОСХОД"|Proportional hydraulic rotary control valve with feedback|
    ITRE20120014A1|2012-02-28|2013-08-29|Ognibene Power Spa|DISTRIBUTOR DEVICE FOR DRIVING|
    US9435446B1|2014-07-24|2016-09-06|Google Inc.|Rotary valve with brake mode|
    US9611946B1|2015-08-17|2017-04-04|Google Inc.|Rotary hydraulic valve|
    JP2020059343A|2018-10-09|2020-04-16|仁科工業株式会社|Power steering valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/944,703|US4311171A|1978-09-22|1978-09-22|Hydrostatic steering controller with pressure dams|
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