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公开(公告)号：US5189940A
公开(公告)日：1993-03-02
申请号：US759390
申请日：1991-09-13
CPC分类号： E02F9/2217 , E02F9/2214
摘要： Vehicles having implements are typically used to perform repetitive functions in work cycles. An implement control system raises and lowers an implement relative to the vehicle and reduces the stresses applied to the vehicle from abruptly stopping the motion of the implement. A lever pilot signal is produced in response to the pivotal position of a control lever. An electrohydraulic pilot signal is also produced. The pilot signal having the greater pressure is directed to a main valve for controlling the position of the implement. The method and apparatus of the instant invention are applicable to a number of vehicles having a hydraulically operated implement.
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公开(公告)号：US5727387A
公开(公告)日：1998-03-17
申请号：US783422
申请日：1997-01-10
CPC分类号： E02F9/2025 , E02F3/434 , E02F9/2214
摘要： An apparatus for controllably moving an implement is provided. The implement is connected to a work machine and is movable between first and second implement positions in response to operation of a hydraulic actuator. The apparatus includes a joystick with first and second positions and a neutral position. The joystick is normally biased in a neutral position and is movable between the first and second positions. The apparatus senses the position of the joystick and responsively generates a joystick position signal. The joystick maintained at the first and second detent positions in response to manual movement of the joystick to the respective first and second detent positions. The joystick is released from the detent position in response to receiving a release detent signal. The apparatus senses the position of the work implement with respect to the work machine. The apparatus provides hydraulic fluid flow to the hydraulic actuator in response to a magnitude of an electrical valve signal. The apparatus receives the joystick position signal, responsively delivers the electrical valve signal. The magnitude of the electrical valve signal is proportional to the joystick position signal. The apparatus compares the implement position signal with a first detent position and a second detent position and responsively produces the release detent signal.
摘要翻译： 提供了一种用于可控地移动工具的装置。 该工具连接到作业机械，并且响应于液压致动器的操作而可在第一和第二工具位置之间移动。 该装置包括具有第一和第二位置的操纵杆和中立位置。 操纵杆通常被偏置在中立位置，并可在第一和第二位置之间移动。 该装置感测操纵杆的位置并且响应地产生操纵杆位置信号。 响应于操纵杆手动移动到相应的第一和第二制动位置，操纵杆保持在第一和第二制动位置。 响应于接收到释放定位信号，操纵杆从制动位置释放。 该装置感测到作业机具相对于作业机器的位置。 该装置响应于电气阀信号的大小向液压致动器提供液压流体流。 该装置接收操纵杆位置信号，响应地传送电动阀信号。 电动阀信号的大小与操纵杆位置信号成正比。 该装置将实施位置信号与第一制动位置和第二制动位置进行比较，并且响应地产生释放定位信号。
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公开(公告)号：US5537818A
公开(公告)日：1996-07-23
申请号：US331449
申请日：1994-10-31
CPC分类号： E02F9/2025 , E02F3/434 , E02F9/2214
摘要： A method for controllably moving an implement is provided. The implement is connected to a work machine and is movable between first and second implement positions in response to operation of a hydraulic actuator. The method includes a joystick with first and second positions and a neutral position. The joystick is normally biased in a neutral position and is movable between the first and second positions. The method senses the position of the joystick and responsively generates a joystick position signals The joystick maintained at the first and second detent positions in response to manual movement of the joystick to the respective first and second detent positions. The joystick is released from the detent position in response to receiving a release detent signal. The method senses the position of the work implement with respect to the work machine. The method provides hydraulic fluid flow to the hydraulic actuator in response to a magnitude of an electrical valve signal. The method receives the joystick position signal, responsively delivers the electrical valve signal. The magnitude of the electrical valve signal is proportional to the joystick position signal. The method compares the implement position signal with a first detent position and a second detent position and responsively produces the release detent signal.
摘要翻译： 提供了一种用于可控制地移动工具的方法。 该工具连接到作业机械，并且响应于液压致动器的操作而可在第一和第二工具位置之间移动。 该方法包括具有第一和第二位置的操纵杆和中立位置。 操纵杆通常被偏置在中立位置，并可在第一和第二位置之间移动。 该方法感测操纵杆的位置并且响应于操纵杆产生操纵杆位置信号。操纵杆响应于操纵杆手动移动到相应的第一和第二制动位置而保持在第一和第二制动位置。 响应于接收到释放定位信号，操纵杆从制动位置释放。 该方法检测作业机具相对于作业机器的位置。 该方法响应于电动阀信号的大小提供液压流体流向液压致动器。 该方法接收操纵杆位置信号，响应地传送电动阀信号。 电动阀信号的大小与操纵杆位置信号成正比。 该方法将实施位置信号与第一制动位置和第二制动位置进行比较，并且响应地产生释放定位信号。
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公开(公告)号：US5617723A
公开(公告)日：1997-04-08
申请号：US563478
申请日：1995-11-28
CPC分类号： E02F9/2025 , E02F3/434 , E02F9/2214
摘要： A method for controlling an apparatus (100) for controllably moving an implement (102) is provided. The implement (102) is connected to a work machine (104) and is movable between first and second implement positions in response to operation of a hydraulic actuator (106). The apparatus (100) includes a joystick (306) with first and second positions and a neutral position. The joystick (306) is normally biased in a neutral position and is movable between the first and second positions. The apparatus senses the position of the joystick (306) and responsively generates a joystick position signal. The joystick (306) maintained at the first and second detent positions in response to manual movement of the joystick to the respective first and second detent positions. The joystick (306) is released from the detent position in response to receiving a release detent signal. The apparatus (100) senses the position of the work implement (102) with respect to the work machine (104). The apparatus (100) provides hydraulic fluid flow to the hydraulic actuator (106) in response to a magnitude of an electrical valve signal. The apparatus (100) receives the joystick position signal, responsively delivers the electrical valve signal. The magnitude of the electrical valve signal is proportional to the joystick position signal. The apparatus (100) compares the implement position signal with a first detent position and a second detent position and responsively produces the release detent signal.
摘要翻译： 提供了一种用于控制用于可控制地移动工具（102）的装置（100）的方法。 工具（102）连接到作业机械（104），并响应于液压致动器（106）的操作而在第一和第二工具位置之间移动。 装置（100）包括具有第一和第二位置的操纵杆（306）和中立位置。 操纵杆（306）通常被偏置在中立位置并且能够在第一和第二位置之间移动。 该装置感测操纵杆（306）的位置并且响应地产生操纵杆位置信号。 操纵杆（306）响应于操纵杆手动移动到相应的第一和第二制动位置而保持在第一和第二制动位置。 响应于接收到释放定位信号，操纵杆（306）从制动位置释放。 设备（100）感测到工作工具（102）相对于工作机器（104）的位置。 设备（100）响应于电动阀信号的大小向液压致动器（106）提供液压流体流。 装置（100）接收操纵杆位置信号，响应地传递电气阀信号。 电动阀信号的大小与操纵杆位置信号成正比。 装置（100）将实施位置信号与第一制动位置和第二制动位置进行比较，并且响应地产生释放定位信号。
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公开(公告)号：US3991633A
公开(公告)日：1976-11-16
申请号：US595478
申请日：1975-07-11
申请人： John Molnar , James E. Schimpf
发明人： John Molnar , James E. Schimpf
CPC分类号： B62D1/184 , Y10T74/20636
摘要： A steering arrangement for construction vehicles and the like comprises a steering column assembly pivotally mounted on a stationary support for selective adjustment about a pivot axis disposed transversely relative to such assembly. A steering handle, rotatably mounted on the assembly, is operatively connected to a steering valve by linkage means for selectively steering a vehicle in response to rotation of the steering handle. The linkage means includes a push-pull cable having its upper end pivotally mounted about a pivot axis coincident with the pivot axis about which the steering column assembly is pivotally mounted on the stationary support to prevent actuation of the steering valve upon adjustment of the steering column assembly.
摘要翻译： 用于施工车辆等的转向装置包括枢转地安装在固定支撑件上的转向柱组件，用于围绕相对于该组件横向设置的枢转轴线的选择性调节。 可旋转地安装在组件上的转向手柄通过联动装置可操作地连接到转向阀，用于响应于转向手柄的旋转选择性地转向车辆。 联动装置包括推拉电缆，其上端枢转地围绕与枢转轴线重合的枢转轴线安装，转向柱组件围绕枢转轴线枢转地安装在固定支撑件上，以防止在转向柱调节时致动转向阀 部件。
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公开(公告)号：US5899008A
公开(公告)日：1999-05-04
申请号：US861554
申请日：1997-05-22
CPC分类号： E02F9/2203 , E02F9/2025 , E02F9/2207 , E02F9/2296 , F15B11/16 , F15B21/087 , F15B2211/6336 , F15B2211/6346 , F15B2211/6355 , F15B2211/6652 , F15B2211/6654 , F15B2211/71 , F15B2211/75
摘要： An apparatus for controllably moving a work implement. The implement is connected to a work machine and is moveable in response to the operation of a hydraulic cylinder. The apparatus includes an operator controlled joystick that generates an operator command signal, which is indicative of a desired velocity of the work implement movement. Cylinder position sensors produce cylinder position signals in response to the position of lift and tilt cylinders. A valve assembly receives an electrical valve signal, and controllably provides hydraulic fluid flow to the respective hydraulic cylinders to move the cylinders in accordance with the operator command signal. A controller receives the operator command and cylinder position signals, and responsively produces a pump command signal to change the displacement of a variable displacement pump to regulate the movement of the hydraulic cylinders.
摘要翻译： 一种用于可控地移动工作装置的装置。 工具连接到作业机器，并且可以响应于液压缸的操作而移动。 该装置包括操作者控制的操纵杆，其产生操作者指令信号，该指示信号表示工作装置运动的期望速度。 气缸位置传感器响应于提升和倾斜气缸的位置产生气缸位置信号。 阀组件接收电气阀信号，并且可控制地将液压流体流动到相应的液压缸，以根据操作者指令信号移动气缸。 控制器接收操作员指令和气缸位置信号，并且响应地产生泵命令信号以改变可变排量泵的位移以调节液压缸的运动。
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公开(公告)号：US4553904A
公开(公告)日：1985-11-19
申请号：US655289
申请日：1981-12-21
申请人： Walter Z. Ruseff , James E. Schimpf
发明人： Walter Z. Ruseff , James E. Schimpf
CPC分类号： F04B49/08
摘要： A pump control assembly (16) controls the displacement of a pump (11) and provides a standby pressure (87) that is greater than the difference (96) between the load pressure and the pump discharge pressure. A valve mechanism (38) provides a predetermined pressure signal to a valve member (23) for adding a force to the valve member to provide a control signal to an actuating member (17) which adjusts the pump's flow and pressure to a standby condition. The pump control assembly provides a more precise control of the standby position while eliminating large, bulky springs.
摘要翻译： PCT No.PCT / US81 / 01715 Sec。 371日期1981年12月21日 102（e）日期1981年12月21日PCT提交1981年12月21日PCT公布。 公开号WO83 / 02304 日期1987年7月7日。泵控制组件（16）控制泵（11）的位移并且提供大于负载压力和泵排出压力之间的差值（96）的待机压力（87）。 阀机构（38）向阀构件（23）提供预定的压力信号，用于向阀构件添加力以向致动构件（17）提供控制信号，该致动构件将泵的流量和压力调节到待机状态。 泵控制组件可以更准确地控制待机位置，同时消除大的笨重的弹簧。
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公开(公告)号：US5876185A
公开(公告)日：1999-03-02
申请号：US752507
申请日：1996-11-20
申请人： James E. Schimpf , Tony L. Marcott
发明人： James E. Schimpf , Tony L. Marcott
IPC分类号： F04B49/08
CPC分类号： F04B49/08 , F04B2205/16
摘要： A variable displacement pump has a discharge passage and a displacement controller disposed to decrease pump displacement in response to an increasing pressure signal and to increase pump displacement in response to a decreasing pressure signal. A load sensing pump control for the pump includes a displacement control valve having an input port connected to the discharge passage and a signal port connected to the displacement controller. A valve spool controls communication between the input and signal ports and is biased in a direction to block the inlet port from the signal port by a spring. The spool has a differential area for exerting a force against the spool in opposition to the spring force proportional to the pump discharge pressure entering the valve through the input port. A variable force can be selectively exerted against the spool in opposition to the spring force to change the displacement of the pump.
摘要翻译： 可变排量泵具有排出通道和位移控制器，其布置成响应于增加的压力信号而减小泵的位移，并响应于压力信号的减小而增加泵的位移。 用于泵的负载感测泵控制器包括排量控制阀，其具有连接到排出通道的输入端口和连接到位移控制器的信号端口。 阀芯控制输入信号端口与信号端口之间的通信，并通过一个弹簧向一个阻止入口端口信号端口的方向偏置。 阀芯具有用于相对于与通过输入端口进入阀的泵排出压力成比例的弹簧力而施加抵抗阀芯的力的差动区域。 可以相对于弹簧力选择性地对阀芯施加可变的力，以改变泵的位移。
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公开(公告)号：US5701793A
公开(公告)日：1997-12-30
申请号：US668886
申请日：1996-06-24
CPC分类号： E02F9/2207 , E02F3/431 , E02F9/2025 , E02F9/2214
摘要： An apparatus for controllably moving a work implement is disclosed. The implement is connected to a work machine and is moveable in response to operation of a hydraulic cylinder. The apparatus includes an operator controlled joystick. A joystick position sensor senses the position of the joystick and responsively generates an operator command signal. An implement position sensor senses the position of the work implement and responsively produces an implement position signal. A microprocessor based controller receives the implement position and operator command signals, modifies the operator command signal, and produces an electrical valve signal in response to the modified operator command signal. An electrohydraulic valve receives the electrical valve signal, and controllably provides hydraulic fluid flow to the hydraulic cylinder in response to a magnitude of the electrical valve signal.
摘要翻译： 公开了一种用于可控地移动工作装置的装置。 工具连接到作业机器，并且可以响应于液压缸的操作而移动。 该装置包括操作者控制的操纵杆。 操纵杆位置传感器感测操纵杆的位置，并响应地产生操作员指令信号。 工具位置传感器感测工作装置的位置并且响应地产生工具位置信号。 基于微处理器的控制器接收实施位置和操作员命令信号，修改操作员指令信号，并响应修改的操作员命令信号产生电气阀信号。 电动液压阀接收电动阀信号，并且响应于电动阀信号的大小可控地向液压缸提供液压流体流。
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公开(公告)号：US4381646A
公开(公告)日：1983-05-03
申请号：US261101
申请日：1980-09-12
申请人： Walter Z. Ruseff , James E. Schimpf
发明人： Walter Z. Ruseff , James E. Schimpf
摘要： It is common practice to provide the servo-system for a variable displacement pump with a "load-plus" valve to maintain pump discharge pressure above a minimum pressure level and above a load pressure in a fluid actuator connected to the pump in response to the load pressure in the actuator. Systems of this type are normally lacking in a device for ensuring that the prime mover for the pump functions at maximum efficiency. This invention is directed to a pressure and horsepower limiting valve (24) for ensuring such efficiency by modulating a load pressure signal (P.sub.L) communicated to the "load-plus" valve (23).
摘要翻译： PCT No.PCT / US80 / 01195 Sec。 371日期1980年9月12日 102（e）1980年9月12日PCT申请1980年9月12日PCT公布。 出版物WO82 / 01047 日期为1982年4月1日。通常的做法是为具有“负载加”阀的可变排量泵提供伺服系统，以将泵排出压力保持在最小压力水平以上并且高于连接的流体致动器中的负载压力 响应于致动器中的负载压力而到达泵。 这种类型的系统通常缺少用于确保泵的原动机以最大效率起作用的装置。 本发明涉及一种用于通过调节与“负载加”阀（23）通信的负载压力信号（PL）来确保这种效率的压力和马力限制阀（24）。
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