-
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。
-
公开(公告)号：US4749055A
公开(公告)日：1988-06-07
申请号：US936111
申请日：1986-11-28
申请人： Fujio Momiyama
发明人： Fujio Momiyama
CPC分类号： B62D5/087 , B62D5/32 , Y10T137/2554
摘要： A power steering assembly for a large vehicle including a primary booster, an auxiliary booster, a primary hydraulic oil pipe adapted to connect the primary booster to the hydraulic pump, an auxiliary hydraulic oil pipe branched off from the primary hydraulic oil pipe and adapted to connect the auxiliary booster to the hydraulic pump, a control valve provided to the primary hydraulic oil pipe at an upper stream side from the place where the auxiliary hydraulic oil pipe is branched off, and a load sensing valve provided to the auxiliary hydraulic oil pipe. When the load of the primary booster is small, the oil pressure of the primary booster is low, the load sensing valve is closed, and only the primary booster is driven, whereas when the load of the primary booster becomes large, the oil pressure of the primary booster is high, the load sensing valve opened, and the auxiliary booster is driven in association with the primary booster to supplement the steering power of the primary booster.
摘要翻译： 一种用于大型车辆的动力转向组件，包括主增压器，辅助助力器，适于将主增压器连接到液压泵的主液压油管，从主液压油管分支的辅助液压油管， 液压泵的辅助助力器，设置在从辅助液压油管分支的地方的上游侧的主液压油管的控制阀以及设置在辅助液压油管上的负载传感阀。 当主增压器的负载小时，主增压器的油压低，负载传感阀关闭，只有主增压器被驱动，而当主增压器的负载变大时，油压 主增压器高，负载传感阀打开，辅助助力器与主增压器相关联，以补充主增压器的转向功率。
-
公开(公告)号：US4705132A
公开(公告)日：1987-11-10
申请号：US787097
申请日：1985-10-15
申请人： Masuo Tsuchiya
发明人： Masuo Tsuchiya
摘要： A power steering gear has a variable restriction structure disposed along an oil passage between a control valve housed in a steering gear box and a power cylinder engaging a steering rack. The variable restriction increases the flow cross-section through the restricted oil passage between the control valve and the power cylinder as the hydraulic pressure in the control valve increases so as to reduce the required steering force when relatively hard steering is called for.
摘要翻译： 动力转向装置具有可变的限制结构，沿着容纳在转向齿轮箱中的控制阀与接合转向齿条的动力缸之间的油路设置。 可变限制通过控制阀和动力缸之间的限制油通道的流动横截面增加，因为控制阀中的液压增加，以便在需要相对较硬的转向时减小所需的转向力。
-
公开(公告)号：US4615408A
公开(公告)日：1986-10-07
申请号：US688130
申请日：1985-01-02
申请人： Ettore Cordiano
发明人： Ettore Cordiano
摘要： In a rack power-steering system, the axial movements of a helical pinion meshing with the rack, resulting from torque applied to the pinion, cause corresponding movements of the movable member of a control valve of the system. This is achieved through a transmission including a piston movable axially with the pinion and defining a variable-volume compartment filled with a substantially-incompressible, deformable material, such as a fluid (oil or grease) or rubber, this material being intended to transmit a control pressure to the movable member of the control valve through a rod which may be formed integrally with the movable member or as a separate member. The variable-volume compartment is located at one end of a cylindrical chamber of the box of the system within which the piston is slidable and the latter is located in a position axially intermediate the variable-volume compartment and an end of the shaft carrying the helical pinion. When the variable-volume compartment is filled with fluid, sealing devices are interposed between the piston and the wall of the cylindrical chamber and between the rod and its slide seat so as to isolate the chamber from the exterior. The sealing devices may, for example, consist of two sealing rings mounted on the external surfaces of the piston and of the rod respectively, or, for example, of two deformable diaphragms fixed around their peripheries to the wall of the cylindrical chamber with their central parts pressed against the piston and against the rod respectively by the fluid in the variable-volume compartment.
摘要翻译： 在机架动力转向系统中，由施加到小齿轮的扭矩导致的与齿条啮合的螺旋小齿轮的轴向运动导致系统的控制阀的可移动部件的相应运动。 这通过传动装置来实现，该传动装置包括可与小齿轮轴向移动的活塞，并且限定了一个充满基本上不可压缩的可变形材料（例如流体（油或油脂）或橡胶）的可变容积室，该材料旨在传递 通过可与可动构件一体形成的杆或作为单独的构件来控制对控制阀的可动构件的压力。 可变容积隔室位于系统箱体的圆柱形腔室的一端，活塞可滑动到其中，后者位于可变容积室的轴向中间位置，承载螺旋状的轴的端部 小齿轮 当可变容积隔室充满流体时，密封装置插入在活塞和圆柱形腔室的壁之间以及杆和其滑动座之间，从而将腔室与外部隔离开来。 密封装置可以例如由分别安装在活塞和杆的外表面上的两个密封环组成，或者例如由围绕其周边的两个可变形隔膜固定到圆柱形室的壁上，其中心 部件通过可变容积隔室中的流体分别压靠活塞并抵靠杆。
-
公开(公告)号：US4574907A
公开(公告)日：1986-03-11
申请号：US587773
申请日：1984-03-09
申请人： Ettore Cordiano
发明人： Ettore Cordiano
摘要： In a control valve for a power-assisted rack-and-pinion steering apparatus having a slidable member adapted to sense the axial movement of a helical tooth pinion, pre-stressed spring means ensure the return of the slidable member of the valve into its central neutral position, against the friction forces existing in the whole apparatus. These means also avoid intervention of power-assistance below a predetermined value of the torque onto the pinion. In one embodiment of the control valve which operates in connection with a closed center air circuit, means are provided to minimize the friction forces allowing at the same time the use of a simple and inexpensive structure.
摘要翻译： 在用于具有适于感测螺旋齿小齿轮的轴向运动的可滑动构件的动力辅助齿条 - 小齿轮转向装置的控制阀中，预应力弹簧装置确保阀的可滑动构件返回其中心 中立位置，抵抗整个设备中存在的摩擦力。 这些装置还可以避免将助力干预低于小齿轮上的转矩的预定值。 在与闭合的中心空气回路连接操作的控制阀的一个实施例中，提供了使摩擦力最小化的装置，同时允许使用简单且便宜的结构。
-
公开(公告)号：US4570737A
公开(公告)日：1986-02-18
申请号：US587768
申请日：1984-03-09
申请人： Ettore Cordiano
发明人： Ettore Cordiano
摘要： In a power-assisted rack-and-pinion steering apparatus, axial movements of a helical tooth pinion resulting from a torque being applied thereto cause corresponding displacements of the movable member of a control valve of the apparatus. A piston which moves axially together with pinion defines a sealed chamber of variable volume, which is filled with an incompressible fluid, such as oil or grease. The movable member of the control valve is slidably mounted along an axis different from the pinion axis and is operated by a push-rod having one end surface arranged so as to sense the pressure within the chamber of variable volume. Means are provided for holding the movable member of the control valve in its central neutral position in case the fluid contained within the chamber is lost.
摘要翻译： 在动力辅助的齿轮齿条转向装置中，由施加扭矩产生的螺旋齿小齿轮的轴向运动引起装置的控制阀的可动件的相应位移。 与小齿轮一起轴向移动的活塞限定了可变体积的密封室，其中填充有不可压缩流体，例如油或油脂。 控制阀的可移动部件沿着与小齿轮轴线不同的轴线可滑动地安装，并且由具有一个端面的推杆操作，该推杆布置成感测室内的压力可变的体积。 提供了用于将控制阀的可移动部件保持在其中心中立位置的装置，以防止容纳在腔室内的流体丢失。
-
公开(公告)号：US4487281A
公开(公告)日：1984-12-11
申请号：US438554
申请日：1982-11-02
申请人： Ettore Cordiano
发明人： Ettore Cordiano
摘要： Power-assisted rack-and-pinion steering mechanism with a slide-valve which senses the axial thrusts acting on the pinion through a kinematic mechanism with a high transmission ratio, the slide member of the valve consisting of a piston 9 provided with frontal rims 11 and 12 on each end face, cooperating with associated seats formed on the housing, said rims and seats forming varying passages through which the two actuator chambers are connected to the reservoir, means being provided for varying also the communication between the same chambers and the pump, depending on the torque applied to the pinion, piston, seats and housing being so designed that the fluid pressure existing in the operative chamber acts on one or the other piston end face and thus gives the driver the measure of the same pressure.The system is particularly suitable for a vacuum operated power-steering system which permits a very strong reduction in cost in comparison with a conventional hydraulic power-steering system.
摘要翻译： 具有滑阀的动力辅助齿条齿轮转向机构，其通过具有高传动比的运动机构感测作用在小齿轮上的轴向推力，阀的滑动构件由具有前轮缘11的活塞9 和12在每个端面上，与形成在壳体上的相关座椅配合，所述轮辋和座椅形成变化的通道，两个致动器室通过该通道连接到储存器，提供用于也改变相同室之间的连通和泵 取决于施加到小齿轮，活塞，座椅和壳体上的扭矩被设计成使得存在于操作室中的流体压力作用在一个或另一个活塞端面上，并且因此给予驾驶员相同压力的量度。 该系统特别适用于真空操作的动力转向系统，与传统的液压动力转向系统相比，其能够大大降低成本。
-
公开(公告)号：US4377217A
公开(公告)日：1983-03-22
申请号：US162650
申请日：1980-06-24
申请人： Masao Nishikawa , Takashi Aoki , Yoichi Sato
发明人： Masao Nishikawa , Takashi Aoki , Yoichi Sato
摘要： A power steering system for vehicles includes a four-way valve slidable in response to applied steering torque for selectively connecting a pair of hydraulic oil chambers of a servo cylinder to a hydraulic pressure source and an oil reservoir. A pair of hydraulic rection chambers are disposed one on each side of the four-way valve and each contain a pair of plungers and a spring interposed therebetween. The plungers are held by and between a pair of diametrical pins supported on the valve and spaced axially from each other. When the reaction chambers are pressurized by an increased speed of the vehicle or a change in resistance from the road surface, the plungers are urged against the pins on the valve to prevent the latter from being slid axially, thereby allowing the driver of the vehicle to feel a suitable resistance to turning of the steering wheel without being assisted by auxiliary power from the servo cylinder.
摘要翻译： 用于车辆的动力转向系统包括可响应于施加的转向扭矩而滑动的四通阀，用于选择性地将伺服缸的一对液压油室连接到液压源和储油器。 一对液压调节室设置在四通阀的每一侧上，并且每个都包含一对柱塞和插入其间的弹簧。 柱塞由支撑在阀上的一对直径销夹持并在其间轴向间隔开。 当反应室被车辆的增加的速度加压或者与路面的阻力变化时，柱塞被推靠在阀上的销上，以防止其轴向滑动，从而允许车辆的驾驶员 感觉到方向盘的转向不受辅助动力从伺服缸的辅助。
-
公开(公告)号：US4206827A
公开(公告)日：1980-06-10
申请号：US951776
申请日：1978-10-16
申请人： Frederick J. Adams
发明人： Frederick J. Adams
摘要： A power assisted gear assembly in which a piston 3 forms with its cylinder opposed chambers 4, 5. Displacement of the piston provides a steering output and such displacement is effected by rotation of an input component 6 which screw threadedly engages the piston 3. Two fluid systems are provided with respective inlets 18, 20 and with the chambers 4, 5 being located one in each fluid system. A valve 10, 15, 16 adjusted by the input component 6 when displacing the piston 3 controls fluid flow through the two fluid systems to an outlet 29 and such valve has a neutral condition to which it is biased by springs 25, 26 or by fluid pressure in the fluid systems in which both fluid systems communicate with the outlet 29 for an open center system. The adjustable part 10 of the valve is in the form of an axially displaceable bearing for the component 6 or a circumferentially displaceable nut through which the piston 3 is driven from the component 6 and this adjustable part is adjusted from the neutral condition of the valve by rotation of the input component 6 and in response to the reaction from the force applied to displace the piston 3 so that such adjustment closes one or the other of the fluid systems, the fluid system which is closed being that in which is located the chamber 4, 5 which under fluid pressure provides assistance to displacement of the piston 3 in the same axial direction as that in which it is driven by rotation of the component 6.There is also disclosed a steering system in which fluid pressure to the inlet ports 18, 20 is derived from the outlets 31, 34 of a flow divider 32.
摘要翻译： 一种动力辅助齿轮组件，其中活塞3与其气缸相对的腔室4,5形成。活塞的位移提供转向输出，并且这种位移是通过旋转地与活塞3螺纹接合的输入部件6来实现的。两个流体 系统设置有相应的入口18,20，并且腔室4,5位于每个流体系统中。 在移动活塞3时由输入部件6调节的阀10,15,16将流过两个流体系统的流体控制到出口29，并且这种阀具有中性状态，由弹簧25,26或流体 其中两个流体系统与开口中心系统的出口29连通的流体系统中的压力。 阀的可调部分10为用于部件6的轴向移动轴承或周向可移位螺母的形式，活塞3通过该螺母从部件6驱动，并且该可调节部件从阀的中性状态被调节 输入部件6的旋转并响应于施加的力的反作用以移动活塞3，使得这种调节关闭一个或另一个流体系统，关闭的流体系统是位于腔室4中的流体系统 5，其在流体压力下提供帮助活塞3在与其通过部件6的旋转驱动的相同的轴向方向上的位移。还公开了一种转向系统，其中流体压力到入口18， 20来自分流器32的出口31,34。
-
公开(公告)号：US4064789A
公开(公告)日：1977-12-27
申请号：US547569
申请日：1975-02-06
申请人： Jaromir Bordovsky , Klaus Katz
发明人： Jaromir Bordovsky , Klaus Katz
摘要： A control valve for a pressure medium servo-motor of a servo-steering mechanism whose valve-adjusting member includes a reaction pressure surface that is immovable relative thereto and is adapted to be acted upon by the reaction pressure in a reaction pressure chamber connected exclusively to one of the two working pressure chambers of the working cylinder of the servo-motor; the valve-adjusting member is also connected with the reaction piston in such a manner as to enable a limited free relative adjusting path between the valve-adjusting member and the reaction piston; the reaction piston, in its turn, includes a reaction relief pressure surface which is adapted to be acted upon by the reaction pressure in a reaction pressure chamber connected exclusively to the same working pressure chamber and which is oppositely directed to the reaction pressure surface; the reaction piston is also supported with respect to the valve housing by means of a spring member which is under a prestress force while its reaction relief pressure surface is arranged in a reaction pressure chamber of the valve housing.
摘要翻译： 一种用于伺服转向机构的压力介质伺服电动机的控制阀，其调节阀构件包括相对于其不可移动的反应压力表面，并且适于在反应压力室中作用于反应压力室中， 伺服电机工作气缸的两个工作压力室之一; 阀调节构件也与反应活塞连接，使得能够在阀调节构件和反作用活塞之间实现有限的自由相对调节路径; 反应活塞又包括反应释放压力表面，该反应释放压力表面适于在与专用于相同工作压力室连接且反向压力表面的反应压力室中由反应压力作用; 反作用活塞还通过处于预应力的弹簧构件相对于阀壳体支撑，同时其反作用力释放压力表面设置在阀壳体的反作用压力室中。
-
-
-
-
-
-
-
-
-
搜索结果
157 条记录 (耗时 0.019 秒)