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公开(公告)号：US4736811A
公开(公告)日：1988-04-12
申请号：US052946
申请日：1987-05-22
CPC分类号： B62D5/32
摘要： The steering system of some lightweight vehicles are electronically controlled and have a manually operated mechanical control as a backup. Such manual backup control would not be adequate for large earthmoving, construction and industrial type vehicles. The subject steering system includes an electrically controlled circuit actuated by rotation of a steering wheel for controlling a main pilot operated steering valve as the primary steering control. A hydraulic control circuit is also actuated by rotation of the steering wheel for controlling the same steering valve as a backup control when the electrically controlled circuit is not active. The hydraulic steering circuit is disabled when the electrically controlled circuit is activated. By using the same steering valve as an integral part of both circuits, the complexity and cost of the overall steering control system is reduced.
摘要翻译： 一些轻型车辆的转向系统是电子控制的，并具有手动操作的机械控制作为备用。 这种手动备用控制对于大型土方工程，建筑和工业型车辆来说是不够的。 主转向系统包括由控制主导向操作的转向阀作为主转向控制的方向盘的旋转致动的电控制回路。 当电控电路不活动时，液压控制回路也通过方向盘的旋转而被驱动，用于控制与备用控制相同的转向阀。 当电气控制电路被激活时，液压转向回路被禁用。 通过使用相同的转向阀作为两个回路的组成部分，整体转向控制系统的复杂性和成本降低。
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公开(公告)号：US5249639A
公开(公告)日：1993-10-05
申请号：US915733
申请日：1992-07-24
申请人： Jerry D. Marr , Howard A. Marsden , Noel J. Rytter
发明人： Jerry D. Marr , Howard A. Marsden , Noel J. Rytter
摘要： Vehicles having front and rear pairs of steerable wheels are sometimes provided with large springs for moving one pair of the wheels to a straight-ahead position during emergency steering. Large amounts of hydraulic energy are expended solely for the compression of such springs every time the pair of wheels are steered. A back-up steering control system (19) of the present steering control arrangement (10) has a servo valve (76) operative to control the flow of pressurized fluid from a back-up pump (60) to a steering control valve (21) which in turn controls the flow of pressurized fluid from the back-up pump to a hydraulic actuator (13) to hydraulically move a first pair of steerable wheels (11) to a straight-ahead position during emergency steering conditions. A manual control valve (68) is operative to control the flow of pressurized fluid from the back-up pump (60) to another steering control valve (22) which in turn controls the flow of pressurized fluid to a hydraulic actuator (16) for effecting steering of a second pair of steerable wheels (12) during the emergency steering condition.
摘要翻译： 具有前后成对的可转向轮的车辆有时设有大的弹簧，用于在紧急转向期间将一对车轮移动到直线前进位置。 大量的液压能量仅用于在每一对转向轮时压缩这种弹簧。 本转向控制装置（10）的后备转向控制系统（19）具有伺服阀（76），该伺服阀可操作以控制加压流体从备用泵（60）到转向控制阀（21）的流动 ），其又控制加压流体从备用泵到液压致动器（13）的流动，以在紧急转向条件期间将第一对可转向轮（11）液压地移动到直线前进位置。 手动控制阀（68）用于控制从备用泵（60）到另一个转向控制阀（22）的加压流体的流动，该转向控制阀（22）进而控制加压流体流向液压致动器（16），用于 在紧急转向条件期间对第二对可转向轮（12）进行转向。
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公开(公告)号：US5261234A
公开(公告)日：1993-11-16
申请号：US817569
申请日：1992-01-07
CPC分类号： E02F9/2228 , E02F9/2012 , E02F9/2203 , F15B11/055 , F15B21/087 , F15B2211/3053 , F15B2211/3111 , F15B2211/3144 , F15B2211/327 , F15B2211/329 , F15B2211/351 , F15B2211/6313 , F15B2211/6346 , F15B2211/6355 , F15B2211/665 , F15B2211/6656 , Y10T137/86622
摘要： An apparatus for controllably actuating a hydraulic actuator is provided. The apparatus is connected between a source of pressurized hydraulic fluid and the hydraulic actuator. The apparatus controllably provides pressurized hydraulic fluid to the hydraulic actuator. The apparatus includes a controller for receiving an operating signal and a load pressure signal and responsively actuating the hydraulic actuator.
摘要翻译： 提供一种用于可控地致动液压致动器的装置。 该装置连接在加压液压流体源和液压致动器之间。 该装置可控地向液压致动器提供加压液压流体。 该装置包括用于接收操作信号和负载压力信号并响应地致动液压致动器的控制器。
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公开(公告)号：US4102425A
公开(公告)日：1978-07-25
申请号：US780559
申请日：1977-03-23
申请人： Howard A. Marsden , Willard J. Haak
发明人： Howard A. Marsden , Willard J. Haak
IPC分类号： B60K17/10 , B60K17/356
CPC分类号： F16H61/4148 , B60K17/10 , B60K17/356
摘要： A vehicle includes an auxiliary front wheel drive system including fluid motors, and a valve movable to supply fluid pressure thereto for driving thereof. A second valve is included in communication with the exhaust conduits of the motors, blocking flow therethrough when the first-mentioned valve is not supplying fluid to the motors. Further a transmission is included for regulating the fluid pressure provided to the fluid motors. Another aspect includes a pressure relief valve and means for selectively varying the relief pressure of the pressure relief valve to provide proper torque characteristics to the front wheel drive system.
摘要翻译： 车辆包括具有流体马达的辅助前轮驱动系统和可移动地向其供应流体压力以用于其驱动的阀。 包括与电动机的排气管连通的第二阀，当首先提到的阀不向马达供应流体时，阻止流过其中。 此外，包括用于调节提供给流体马达的流体压力的变速器。 另一方面包括减压阀和用于选择性地改变减压阀的溢流压力以向前轮驱动系统提供适当扭矩特性的装置。
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公开(公告)号：US5182908A
公开(公告)日：1993-02-02
申请号：US819705
申请日：1992-01-13
CPC分类号： E02F9/2221 , F15B11/162 , F15B11/165 , F15B21/08 , G05B19/042 , G05B19/43 , F15B2211/20546 , F15B2211/20576 , F15B2211/6309 , F15B2211/633 , F15B2211/6333 , F15B2211/6336 , F15B2211/6346 , F15B2211/6651 , F15B2211/6652 , F15B2211/71 , F15B2211/781 , F15B2211/865
摘要： An apparatus controls a fluid system of a work vehicle. The work vehicle has an engine and at least one fluid circuit which has a pump driven by the engine. A plurality of control valves controllably pass fluid from the pump to a plurality of respective work elements. The control valves have movable valve stems. A work attachment which has a respective control valve is added to the fluid system. A plurality of operator control elements provide demand signals in response to selected settings. Each demand signal is indicative of a requested fluid flow to a respective work element or work attachment. A memory device stores select parameters of the fluid system. One of the select parameters is a predetermined priority value representing the precedence in which fluid is delivered from the pump to the control valve of the work attachment. A controller receives the predetermined priority value of the work attachment and the demand signals. The controller responsively determines the sequence in which fluid is distributed from the pump to the respective control valves. Then the controller delivers control signals to the rerspective control valves in response to the determination, selectively positioning the stem of the respective control valves.
摘要翻译： 一种装置控制作业车辆的流体系统。 工作车辆具有发动机和至少一个具有由发动机驱动的泵的流体回路。 多个控制阀可控地将流体从泵传递到多个相应的工作元件。 控制阀具有可动阀杆。 具有相应控制阀的工件附加到流体系统中。 多个操作员控制元件响应于所选择的设置来提供需求信号。 每个需求信号指示要求的流体流向相应的工件或工件附件。 存储装置存储流体系统的选择参数。 选择参数中的一个是预定的优先级值，其表示流体从泵输送到工件附件的控制阀的优先级。 控制器接收工作附件和需求信号的预定优先级值。 控制器响应地确定流体从泵分配到相应的控制阀的顺序。 然后，控制器响应于确定，向控制阀提供控制信号，选择性地定位各个控制阀的阀杆。
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公开(公告)号：US5348115A
公开(公告)日：1994-09-20
申请号：US95567
申请日：1993-07-19
IPC分类号： B60K17/10 , B60K17/356 , B60K31/00 , B60K7/00
CPC分类号： B60K17/356
摘要： An apparatus is provided for use in a vehicle having a source of pressurized fluid and a pair of hydraulic drive motors connected to the pressurized fluid source and powered thereby. First and second ground engaging devices are connected to and driven by the first and second motors, respectively. The apparatus includes first and second control members, each being positionable at a plurality of locations for indicating a desired speed and direction for a respective drive motor. First and second actuators are adapted to sense the position of the first and second control members, respectively, and responsively control the direction and rate of fluid flow to the first and second drive motors. A set switch is movable between first and second positions and is adapted to produce a set speed signal in the second position. A set speed device is provided for receiving the set speed signal and operating the drive motors at a constant speed in response to the set speed signal, wherein the speed of the motors is responsive to the position of the control members upon reception of the set speed signal.
摘要翻译： 提供了一种用于具有加压流体源的车辆和连接到加压流体源的动力的一对液压驱动马达的装置。 第一和第二接地装置分别连接到第一和第二电动机并由其驱动。 该装置包括第一和第二控制构件，每个控制构件可定位在多个位置，用于指示相应的驱动马达的期望速度和方向。 第一和第二致动器分别适于感测第一和第二控制构件的位置，并且响应地控制流向第一和第二驱动马达的流体的方向和速率。 设置开关可在第一和第二位置之间移动，并且适于在第二位置产生设定速度信号。 提供了一种设定速度装置，用于接收设定速度信号并响应于设定速度信号以恒定速度操作驱动马达，其中马达的速度响应于控制构件在接收到设定速度时的位置 信号。
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公开(公告)号：US4206688A
公开(公告)日：1980-06-10
申请号：US914117
申请日：1978-06-09
IPC分类号： F15B11/02 , F15B13/01 , F15B11/08 , F15B13/042
CPC分类号： F15B13/01 , Y10T137/87241
摘要： A hydraulic system including a hydraulic motor having a port adapted to be connected to a reservoir and a hydraulic fluid pump. A normally closed check valve connects the port to the reservoir and includes two, hydraulically opposed, differential surfaces, one being smaller than the other and being disposed to be responsive to pressure at the port. Included is a normally closed, pilot-operated, first metering valve having an inlet and an outlet and a second metering valve also having an inlet and an outlet along with a shiftable metering element interposed therebetween. A spring biases the element towards a position minimizing flow between the inlet and the outlet and a pressure responsive surface is disposed on the element in bucking relation to the spring. The first valve inlet is connected to the second valve outlet and to a larger surface of the check valve and the port is connected to the second valve inlet as well as connected to direct pressure to the second valve pressure responsive surface. The first valve outlet is connected to the reservoir. The first valve controls the degree to which the check valve may open while the second valve provides load compensation in the circuit.
摘要翻译： 一种液压系统，包括液压马达，其具有适于连接到储存器的端口和液压流体泵。 常闭止回阀将端口连接到储存器并且包括两个液压相对的差动表面，一个小于另一个，并且被设置为响应于端口处的压力。 包括具有入口和出口的常闭的先导式第一计量阀，以及第二计量阀，还具有插入其间的可移动计量元件的入口和出口。 弹簧将元件偏压到最小化入口和出口之间的流动的位置，并且压力响应表面以与弹簧相抗衡的方式设置在元件上。 第一阀入口连接到第二阀出口和止回阀的较大表面，并且端口连接到第二阀入口，并且连接到第二阀压力响应表面的直接压力。 第一阀出口连接到储存器。 第一个阀门控制止回阀打开的程度，而第二个阀门在回路中提供负载补偿。
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公开(公告)号：US4126083A
公开(公告)日：1978-11-21
申请号：US766102
申请日：1977-02-07
CPC分类号： E02F3/966 , E02F3/437 , Y10T137/87177
摘要： In a vehicle including a stick cylinder movable to change the attitude of a stick relative to a boom, and an implement cylinder movable to change the inclination of an implement relative to the stick, hydraulic circuit means are provided for serially connecting the cylinders so that as the stick cylinder moves the stick in one direction, discharge of fluid from the stick cylinder is used to actuate the implement cylinder to maintain substantially the same attitude of the implement relative to the ground. A flow divider is interposed between the cylinders to provide the desired degree of actuation of the implement cylinder in response to actuation of the stick cylinder. A dual pressure-responsive bypass valve provides a relatively high pressure relief to the implement cylinder when the implement cylinder is operated independently of the stick cylinder and provides a relatively low discharge path for the implement cylinder when operated in series with the stick cylinder.
摘要翻译： 在包括可移动以改变杆相对于起重臂的杆状态的杆筒的车辆中，以及可移动以改变工具相对于杆的倾斜度的工具缸，用于串联连接缸，使得 棒筒在一个方向上移动棒，使用来自棒筒的流体的排出来致动工具缸，以保持工具相对于地面基本相同的姿态。 在气缸之间插入分流器，以响应于棒筒的致动而提供工具缸的所需程度的致动。 双重压力响应旁路阀在工具缸独立于棒式气缸操作时提供相对较高的压力释放，并且当与棒式气缸串联操作时为工具气缸提供相对较低的排放路径。
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公开(公告)号：US4250794A
公开(公告)日：1981-02-17
申请号：US892370
申请日：1978-03-31
IPC分类号： F15B11/08 , F15B11/00 , F15B11/05 , F15B13/04 , F15B13/042
CPC分类号： F15B11/003 , F15B11/006 , F15B11/05 , F15B13/0405 , F15B13/0426 , F15B2211/20576 , F15B2211/30505 , F15B2211/30525 , F15B2211/30575 , F15B2211/3116 , F15B2211/31529 , F15B2211/31576 , F15B2211/329 , F15B2211/40515 , F15B2211/41563 , F15B2211/428 , F15B2211/46 , F15B2211/6054 , F15B2211/7053
摘要： A high pressure hydraulic system, including a bidirectional fluid motor having two ports, a pair of normally closed, pilot operated poppet valves, each connected to an associated port, a fluid reservoir, a flow sensor having a flow path interconnecting each of the poppet valves and the reservoir and having an output for providing a signal representing the flow rate, along the flow path, a pair of metering valves each connected to the pilot of an associated poppet valve for controlling the flow of fluid through the associated poppet valve, control signal inputs for each of the metering valves, and flow rate signal inputs connected to the output of the flow sensor for each of the metering valves so that each poppet valve is ultimately controlled by both control signals and the flow rate through the flow sensor.
摘要翻译： 一种高压液压系统，包括具有两个端口的双向流体马达，一对常闭的先导操作提升阀，每个连接到相关联的端口，流体储存器，流量传感器，其具有将每个提升阀 并且具有用于提供表示沿流动路径的流量的信号的输出，一对计量阀，每个计量阀连接到相关提升阀的引导件，用于控制通过相关提升阀的流体流动，控制信号 每个计量阀的输入和连接到每个计量阀的流量传感器的输出的流量信号输入，使得每个提升阀最终由控制信号和通过流量传感器的流量控制。
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公开(公告)号：US4029166A
公开(公告)日：1977-06-14
申请号：US577135
申请日：1975-05-13
IPC分类号： B60K17/04 , B62D55/125 , B62D55/12
CPC分类号： B62D55/125 , Y10S475/90
摘要： A track-type vehicle comprises a track roller frame mounted on either side thereof and an endless track assembly mounted on each of the frames. Each frame further carries a final drive thereon, including at least one planetary gear set and a sprocket drivingly engaged with a respective track assembly. The power input to the final drive preferably comprises a hydrostatic motor for selectively driving a carrier of the planetary gear set which is attached to the sprocket for simultaneous rotation therewith.
摘要翻译： 轨道式车辆包括安装在其任一侧的履带滚子框架和安装在每个框架上的环形轨道组件。 每个框架进一步在其上承载最终的驱动，包括至少一个行星齿轮组和与相应轨道组件驱动接合的链轮。 输入到最终驱动器的动力优选地包括用于选择性地驱动行星齿轮组的载体的静液压马达，该行星齿轮组附接到链轮以与其同时旋转。
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