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公开(公告)号：US5740879A
公开(公告)日：1998-04-21
申请号：US465769
申请日：1995-06-06
摘要： A vehicle speed responsive power steering apparatus enables a pressure which acts upon a power cylinder to be variably controlled in accordance with a vehicle speed or the like, thus allowing an assisting force to be controlled in a variable manner. A control valve CV selectively connects a pump P and a tank T to left and right chambers CL, CR of a power cylinder. The control valve comprises a first and a second fluid pressure bridge circuit 10, 20. The first fluid pressure bridge circuit includes a left and a right path 12, 13, in which a first and a second pair of variable throttles 1R, 1L and 2L, 2R are disposed which are opened or closed in response to a steering operation. The left and the right chamber of the cylinder are connected to the respective paths at the junctions between the variable throttles. A pair of paths 21, 22 branch from a supply path 11 extending from the pump, and a second fluid pressure bridge circuit is defined between the paths 21, 22, in parallel relationship with the first fluid pressure bridge circuit. The second fluid pressure bridge circuit includes variable throttles 3L, 3R, 4R, 4L which are opened and closed in response to a steering operation, and a vehicle speed responsive variable throttle valve 6 which is controlled to be opened or closed in accordance with a vehicle speed.
摘要翻译： 车辆速度响应型动力转向装置使得能够根据车辆速度等可变地控制作用在动力缸上的压力，从而允许以可变的方式控制辅助力。 控制阀CV选择性地将泵P和罐T连接到动力缸的左室CL和右室CL。 控制阀包括第一和第二流体压力桥接电路10,20。第一流体压力桥接电路包括左右路径12,13，其中第一和第二对可变节流管1R，1L和2L ，2R设置成响应于转向操作而打开或关闭。 圆筒的左右室连接在可变节流管之间的连接处的相应路径上。 一对路径21,22从从泵延伸的供应路径11分支，并且第二流体压力桥接电路以与第一流体压力桥接电路平行的关系限定在路径21,22之间。 第二流体压力桥电路包括响应于转向操作而打开和关闭的可变节流器3L，3R，4R，4L，以及根据车辆被控制为打开或关闭的车速响应可变节流阀6 速度。
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公开(公告)号：US5332055A
公开(公告)日：1994-07-26
申请号：US63215
申请日：1993-05-17
申请人： Yasuyoshi Emori , Ikuo Nomura , Tetsuya Koike
发明人： Yasuyoshi Emori , Ikuo Nomura , Tetsuya Koike
CPC分类号： B62D6/02
摘要： A power steering apparatus includes a main hydraulic path, a reactive oil pressure supply path, and a hydraulic reaction mechanism. The main hydraulic path supplies an oil pressure from a pump to a flow path switching valve connected to a power cylinder. The reactive oil pressure supply path branches from a portion of the main hydraulic path. The hydraulic reaction mechanism introduces part of the oil pressure, caused to diverge by the reactive oil pressure supply path, into a hydraulic reaction chamber for generating a steering reaction through a hydraulic reaction control valve mechanism controlled in accordance with the traveling conditions of a vehicle. A restriction smaller in diameter than the main hydraulic path is arranged between a branch portion branching from the main hydraulic path and the hydraulic reaction control valve mechanism, midway along the reactive oil pressure supply path.
摘要翻译： 动力转向装置包括主液压路径，反作用油压供给路径和液压反作用机构。 主液压路径将泵的油压提供给连接到动力缸的流路切换阀。 活动油压供给路径从主液压路径的一部分分支。 液压反应机构将通过反作用油压供给路径发散的一部分油压引入液压反应室，以通过根据车辆的行驶状况控制的液压反应控制阀机构产生转向反作用力。 直径小于主液压路径的限制配置在从主液压路径分支的分支部与液压反应控制阀机构之间，沿着反作用油压力供给路径的中途。
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公开(公告)号：US5152359A
公开(公告)日：1992-10-06
申请号：US671346
申请日：1991-03-19
摘要： A reaction pressure control mechanism of power steering apparatus includes a power cylinder, to which a pressure oil discharged from an oil pump is supplied through a control valve, and oil discharged from the oil pump is branched to be introduced into a hydraulic reaction chamber, which produces steering reaction. A pair of variable restrictions are formed in a supply and discharge passage to and from the hydraulic reaction chamber, and a single spool which is operated by a solenoid is effective to increase the opening of one of the variable restrictions while reducing the opening of the other restriction. A plunger is disposed in opposing relationship with a rod associated with the solenoid and on which the spool is fixedly mounted so that when the oil pressure in the reaction chamber exceeds a given value, such oil pressure is introduced to the backside of the plunger to cause the spool to be driven back, thus reducing the opening of the variable restriction associated with the supply passage.
摘要翻译： 动力转向装置的反作用压力控制机构包括动力缸，通过控制阀向油泵供给的压力油供给到动力缸，并且从油泵排出的油被分支引入液压反应室， 产生转向反应。 在进出液压反应室的供给和排出通道中形成一对可变限制，并且由螺线管操作的单个阀芯有效地增加可变限制中的一个的打开，同时减少另一个的打开 限制。 柱塞与与螺线管相关联的杆相对设置，并且其上固定安装有线轴，使得当反应室中的油压超过给定值时，这种油压被引入到柱塞的背面，引起 所述线轴被驱回，从而减小与供应通道相关联的可变限制的打开。
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公开(公告)号：US5263512A
公开(公告)日：1993-11-23
申请号：US989774
申请日：1992-12-14
CPC分类号： B62D5/0837 , Y10T137/86654 , Y10T137/86662
摘要： In each of both ends of a land portion provided between channels which are formed in a slidable contact surface of a rotor assembled in a sleeve so as to be rotationally displaceable relative to the sleeve and thus control connection and disconnection of fluid paths, a chamfer is formed from an edge to a throttling action end portion of the land portion of the rotor so as to have at least one flat acting surface and a curved acting surface continuously connected to the flat acting surface. The curved acting surface of the chamfer is formed to have a smooth, continuously curved surface with a radius of curvature which decreases gradually from a connection portion with respect to the flat acting surface to a point at which it is connected to an outer diameter portion of the rotor. When a throttling action is performed by rotationally displacing the rotor with respect to the sleeve, an angle defined between the flat and curved acting surfaces at a connection point between them and an angle defined between the curved acting surface and a tangent at a point at which the curved acting surface is connected to the outer diameter portion of the rotor are maintained small, which reduces fluid noise caused by cavitation.
摘要翻译： 在设置在通道之间的接地部分的两端中的每一个中，所述接地部分形成在组装在套筒中的转子的可滑动接触表面中，以便相对于套筒可旋转移位，从而控制流体路径的连接和断开， 从转子的陆部的边缘到节流动作端部形成为具有连续地连接到平坦作用面的至少一个平坦作用面和弯曲作用面。 倒角的弯曲作用表面形成为具有光滑的，连续弯曲的表面，其曲率半径从连接部分相对于平坦作用表面逐渐减小到其连接到外部直径部分的点 转子。 当通过相对于套筒旋转地移动转子来执行节流动作时，在平坦和弯曲作用表面之间的角度处限定在它们之间的连接点处，并且在弯曲作用表面和在其之间的切线 连接到转子的外径部分的弯曲作用表面保持较小，这降低了由气蚀引起的流体噪声。
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公开(公告)号：US5168949A
公开(公告)日：1992-12-08
申请号：US686661
申请日：1991-04-17
IPC分类号： B62D6/02
CPC分类号： B62D6/02
摘要： A subpump has its discharge flow rate increased in response to an increase in a vehicle speed. A variable throttle is disposed in a discharge passage from the subpump, and an oil pressure taken from the upstream side of the variable throttle is introduced into a hydraulic reaction chamber to produce a steering action. A main pump has its flow rate increased or decreased in accordance with a number of revolutions thereof, and feeds a pressure oil to a power steering control valve through a passage in which a fixed restriction is disposed. An oil pressure which prevails upstream of the fixed restriction acts upon the variable throttle to change its area of opening, thereby controlling the steering force.
摘要翻译： 副泵的排气流量随着车速的增加而增加。 可变节流阀设置在来自副泵的排气通道中，从可变节流阀的上游侧获取的油压被引入到液压反应室中以产生转向作用。 主泵的流量根据其转数而增加或减少，并且通过设置有固定限制的通道将压力油供给到动力转向控制阀。 在固定限制器上游的油压作用在可变节流阀上以改变其开口面积，由此控制转向力。
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公开(公告)号：US5135068A
公开(公告)日：1992-08-04
申请号：US789795
申请日：1991-11-12
IPC分类号： B62D6/02
CPC分类号： B62D6/02
摘要： A hydraulic reaction device of a power steering apparatus includes a vehicle-speed responsive pump, a reaction plunger, a hydraulic reaction chamber, a path, and a variable control unit. The vehicle-speed responsive pump has a pressure oil discharge flow rate which changes in accordance with a vehicle speed. The reaction plunger selectively constraining relative pivotal displacement between input and output shafts constituting a rotary flow path switching valve of the power steering apparatus. The hydraulic reaction chamber receives the pressure oil from the pump to apply a reaction oil pressure to the reaction plunger. The path is arranged to connect the hydraulic reaction chamber to a tank. The variable control unit (a variable throttle portion 37 of a reaction oil pressure control valve 11) for variably controlling a flow rate of the pressure oil flowing through the path. The variable control unit is variably controlled in accordance with a magnitude of an oil pressure in a main oil pressure path extending from a main pump to the left and right chambers of the power cylinder.
摘要翻译： 动力转向装置的液压反应装置包括车速响应泵，反应柱塞，液压反应室，路径和可变控制单元。 车速响应泵具有根据车速而变化的压力油排出流量。 反应柱塞选择性地限制构成动力转向装置的旋转流路切换阀的输入和输出轴之间的相对枢转位移。 液压反应室从泵接收压力油，以将反应油压施加到反应柱塞。 该路径被布置成将液压反应室连接到罐。 可变控制单元（反作用油压控制阀11的可变节流部37），用于可变地控制流经路径的压力油的流量。 可变控制单元根据从主泵延伸到动力缸的左室和右室的主油压路径中的油压的大小可变地控制。
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公开(公告)号：US4877100A
公开(公告)日：1989-10-31
申请号：US231808
申请日：1988-08-12
申请人： Yasuyoshi Emori , Hiroshi Ohsaki , Ikuo Nomura
发明人： Yasuyoshi Emori , Hiroshi Ohsaki , Ikuo Nomura
CPC分类号： B62D6/00
摘要： A hydraulic reaction force apparatus for a power steering system includes input and output shafts, a flange, balls, a reaction force receiving portion, a hydraulic reaction force chamber, and an annular reaction force piston. The input and output shafts are accommodated in a body. The flange is formed on one of the input and output shafts and has axial through guide holes. The balls are movably fitted in the guide holes, respectively. The reaction force receiving portion is formed on the other one of the input and output shafts to axially receive the balls. The hydraulic reaction force chamber is formed at a position opposite to the reaction force receiving force receiving portion with respect to the flange. The reaction force piston is movably and coaxially fitted on the output shaft with a clearance to urge the balls against the reaction force receiving portion so as to generate a restriction force corresponding to a reaction force oil pressure. The restriction force acts between the input and output shafts. Seal rings are disposed between the reaction force piston and the body and between the reaction force piston and the one of the input and ouput shafts.
摘要翻译： 用于动力转向系统的液压反作用力装置包括输入和输出轴，法兰，球，反力接收部分，液压反作用力室和环形反作用力活塞。 输入和输出轴容纳在一个体内。 凸缘形成在输入轴和输出轴之一上，并具有轴向通孔。 球分别可移动地装配在导孔中。 反作用力接收部分形成在另一个输入轴和输出轴上以轴向地接收球。 液压反作用力室相对于凸缘形成在与反力接收力接收部相对的位置。 反作用力活塞以一定的间隙可移动地同轴地装配在输出轴上，以将球推向反作用力接收部分，以产生对应于反作用力油压的限制力。 限制力作用在输入和输出轴之间。 密封环设置在反作用力活塞和主体之间以及反作用力活塞与输入和输出轴之一之间。
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公开(公告)号：US4899842A
公开(公告)日：1990-02-13
申请号：US263632
申请日：1988-10-27
申请人： Yasuyoshi Emori , Hiroshi Ohsaki , Ikuo Nomura
发明人： Yasuyoshi Emori , Hiroshi Ohsaki , Ikuo Nomura
IPC分类号： B62D6/02
CPC分类号： B62D6/02 , Y10T137/8671
摘要： A steering force controller for power steering apparatus is disclosed, which controls an oil pressure supplied to an oil pressure reaction chamber in accordance with a position of a spool valve which is caused to be displaced fore and aft in accordance with a vehicle speed. The spool valve is slidably fitted into a sleeve which is in turn disposed within a bore formed in a housing. The oil pressure supplied to the oil pressure reaction chamber can be controlled in accordance with the displaced position of the spool valve with respect to the sleeve. A regulating member is provided for causing an axial displacement of the sleeve, thus facilitating a regulation of a relative position between the spool valve and the sleeve.
摘要翻译： 公开了一种用于动力转向装置的转向力控制器，其根据根据车辆速度前后移动的滑阀的位置来控制供给到油压反应室的油压。 滑阀可滑动地装配到套筒中，套筒又设置在形成在壳体中的孔内。 可以根据滑阀相对于套筒的位移位置来控制供应到油压反应室的油压。 设置有用于引起套筒的轴向位移的调节构件，从而有助于调节滑阀和套筒之间的相对位置。
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公开(公告)号：US5330024A
公开(公告)日：1994-07-19
申请号：US1979
申请日：1993-01-08
申请人： Yasuyoshi Emori , Ikuo Nomura
发明人： Yasuyoshi Emori , Ikuo Nomura
CPC分类号： B62D6/02
摘要： A hydraulic reaction-type steering force control apparatus is provided to improve the sealing performance of a seal ring for preventing liquid leakage from a hydraulic reaction chamber by improving throttling actions in oil passages of chambers before and after the seal ring to prevent the reversal in pressure between the chambers before and after the seal ring. This eliminates a discontinuity phenomenon occurring due to a temporary deficiency of reaction oil pressure during steering operation caused by leakage from the hydraulic reaction chamber. The hydraulic reaction chamber constitutes a hydraulic reaction mechanism supplied with a reaction oil pressure from a hydraulic reaction force control valve mechanism, which is controlled in accordance with vehicle running conditions. A reaction piston has seal members on its slide surfaces and selectively constrains a relative rotational displacement between input and output shafts of a power steering system. First and second low-pressure chambers are allowed to communicate with a tank through their respective throttles. Also, a low-pressure chamber in the hydraulic reaction force control valve mechanism is connected on the upstream side of the throttle at position midway along a connection passage between the first low-pressure chamber and the tank. With this arrangement, the pressure in the hydraulic reaction chamber can be set substantially equal to or higher than the internal pressure in the first low-pressure chamber at any instant limiting the directions of the pressures acting on the seal members of the reaction piston to a predetermined direction constantly.
摘要翻译： 提供了一种液压反作用转向力控制装置，以通过改善密封环之前和之后的腔室的油通道中的节流作用来改善用于防止液压从液压反应室泄漏的密封环的密封性能，以防止压力反转 在密封环之前和之后的腔室之间。 这消除了由于从液压反应室的泄漏引起的转向操作期间反应油压暂时不足而发生的不连续现象。 液压反应室构成由液压反作用力控制阀机构供给的反作用油压的液压反应机构，其根据车辆行驶状况进行控制。 反应活塞在其滑动表面上具有密封构件，并且选择性地约束动力转向系统的输入和输出轴之间的相对旋转位移。 允许第一和第二低压室通过它们各自的节流阀与罐连通。 此外，液压反作用力控制阀机构中的低压室在第一低压室与油箱之间的连接通路中途位于节流阀的上游侧。 通过这种布置，液压反应室中的压力可以在任何时刻将作用在反应活塞的密封构件上的压力的方向限制在一个等于或等于第一低压室内的压力 预定方向不断。
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公开(公告)号：US4709591A
公开(公告)日：1987-12-01
申请号：US861743
申请日：1986-05-07
申请人： Yasuyoshi Emori , Ikuo Nomura
发明人： Yasuyoshi Emori , Ikuo Nomura
CPC分类号： B62D3/12 , Y10T74/1967 , Y10T74/2063
摘要： A rack-and-pinion steering apparatus of center-takeoff type is disclosed in which track rods are connected to an intermediate portion of a rack shaft. A stop member is secured to the rack shaft for limiting the axial movement of the rack shaft by abutment against a housing. A resilient member is mounted on a part of these contacting surfaces so that the resilient member initially contacts either component to absorb impact before a contact occurs between metals, thus assuring the stroke limiting function while reducing the generation of percussion sounds.
摘要翻译： 公开了一种中心型的齿轮齿条转向装置，其中履带杆连接到齿条轴的中间部分。 止动构件被固定到齿条轴，用于通过抵靠壳体来限制齿条轴的轴向运动。 弹性构件安装在这些接触表面的一部分上，使得弹性构件最初接触任一组件以在金属之间发生接触之前吸收冲击，从而确保冲程限制功能同时减少敲击声的产生。
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