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    • 1. 发明授权
    • Hydraulic steering apparatus
    • 液压转向装置
    • US07306071B2
    • 2007-12-11
    • US10512541
    • 2003-03-13
    • Edwin HarnischfegerErhard BergmannWalter ScandellaVincenzo Domenico Bollero
    • Edwin HarnischfegerErhard BergmannWalter ScandellaVincenzo Domenico Bollero
    • B62D5/06
    • B62D5/093
    • A hydraulic steering apparatus with steering amount amplification is provided, wherein a metering device for supplying pressure medium to steering cylinders is actuated in accordance with an amount of rotation of the steering wheel. With the aid of a control block it is possible to deliver an additional pressure medium volume to the steering cylinders, wherein control of the control block is effected through the intermediary of a control circuit containing an effective control pressure that is substantially lower than the load pressure for transmitting the steering moment at the steering cylinder. A spring assembly for the control block is also provided, wherein two springs are arranged in parallel, one of which only takes effect following a predetermined stroke of the control element.
    • 提供了具有转向量放大的液压转向装置,其中根据转向盘的旋转量来致动用于向转向缸供应压力介质的计量装置。 借助于控制块,可以向转向油缸传送额外的压力介质体积,其中控制块的控制通过中间的控制回路进行,控制回路包含有效控制压力,该控制压力基本上低于负载压力 用于在转向缸处传递转向力矩。 还提供了一种用于控制块的弹簧组件,其中两个弹簧平行布置,其中一个仅在控制元件的预定行程之后才起作用。
    • 2. 发明申请
    • Hydraulic steering device
    • 液压转向装置
    • US20050161278A1
    • 2005-07-28
    • US10512541
    • 2003-03-13
    • Edwin HarnischfegerErhard BergmannWalter ScandellaVincenzo Bollero
    • Edwin HarnischfegerErhard BergmannWalter ScandellaVincenzo Bollero
    • B62D5/093B62D5/06
    • B62D5/093
    • What is disclosed is a hydraulic steering apparatus with steering amount amplification, wherein a metering device for supplying pressure medium to steering cylinders is actuated in accordance with an amount of rotation of the steering wheel. With the aid of a control block it is possible to deliver an additional pressure medium volume to the steering cylinders, wherein control of the control block in accordance with the invention is effected through the intermediary of a control circuit containing an effective control pressure that is substantially lower than the load pressure for transmitting the steering moment at the steering cylinder. There is moreover disclosed a spring assembly for the control block, wherein two springs are arranged in parallel, one of which only takes effect following a predetermined stroke of the control element. Hereby it is possible to adjust a characteristic line according to which the control element is biased into the zero position with a minimum bias, an optionally existing overlap may be passed through with a low control pressure difference, and the control pressure range for opening the control block is sufficiently large.
    • 所公开的是具有转向量放大的液压转向装置,其中根据方向盘的旋转量来致动用于向转向缸供应压力介质的计量装置。 借助于控制块,可以向转向油缸传送额外的压力介质体积,其中根据本发明的控制块的控制通过中间的控制回路来实现,该控制回路包含基本上 低于用于传递转向缸处的转向力矩的负载压力。 此外还公开了一种用于控制块的弹簧组件,其中两个弹簧平行布置,其中一个仅在控制元件的预定冲程之后才起作用。 由此,可以以最小偏压来调节控制元件偏置到零位置的特性线,可以以低控制压力差通过可选存在的重叠,并且用于打开控制的控制压力范围 块足够大。
    • 6. 发明授权
    • Hydraulic system for a mobile work device, in particular a wheel loader
    • 用于移动作业装置的液压系统,特别是轮式装载机
    • US5802847A
    • 1998-09-08
    • US737363
    • 1996-11-01
    • Edwin Harnischfeger
    • Edwin Harnischfeger
    • E02F9/22F15B11/00F16D31/02
    • E02F9/2267E02F9/2207E02F9/2217E02F9/2271
    • A hydraulic system for a mobile machine, in particular a wheel loader, has a longitudinal oscillation damping function. The hydraulic system has at least one hydraulic cylinder (13) with which a tool can be operated and whose inner space is divided by a piston (15) into two pressure chambers (17, 18); a stop valve (12) which connects one of the two pressure chambers (17, 18) to a hydraulic reservoir (42) which can be filled via a filling pipe; and a distributing or directional control valve (11) with a spool or slide valve (40) for the separate pressurization of the two pressure chambers (17, 18) in the hydraulic cylinder (13) and/or for connecting them to a tank (29). To facilitate low-cost and space-saving construction of a system of this type, the stop valve is incorporated in the distributing valve (11) in such a way that the hydraulic reservoir (42) and the first pressure chamber (17) of the hydraulic cylinder (13) can be connected to each other via the spool valve (40) of the distributing valve (11).
    • PCT No.PCT / EP95 / 01556 Sec。 371日期:1996年11月1日 102(e)日期1996年11月1日PCT提交1995年5月25日PCT公布。 第WO95 / 30800号公报 日期:1995年11月16日一种用于移动机械,特别是轮式装载机的液压系统具有纵向振动阻尼功能。 液压系统具有至少一个液压缸(13),工具可以通过该液压缸操作,其内部空间被活塞(15)分成两个压力室(17,18); 将两个压力室(17,18)中的一个连接到可经由填充管填充的液压储存器(42)的截止阀(12); 以及分配或方向控制阀(11),其具有阀芯或滑阀(40),用于单独加压液压缸(13)中的两个压力室(17,18)和/或用于将其连接到罐( 29)。 为了促进这种系统的低成本和节省空间的构造,截止阀以这样的方式结合在分配阀(11)中,使得液压储存器(42)和第一压力室(17) 液压缸(13)可以经由分配阀(11)的滑阀(40)彼此连接。
    • 7. 发明授权
    • Control device for a hydraulic pump
    • 液压泵控制装置
    • US5720168A
    • 1998-02-24
    • US693148
    • 1996-08-09
    • Edwin Harnischfeger
    • Edwin Harnischfeger
    • F15B11/02F15B11/05F15B11/16F16D31/02
    • F15B11/165F15B2211/20553F15B2211/30525F15B2211/3144F15B2211/31511F15B2211/329F15B2211/355F15B2211/605F15B2211/67F15B2211/71
    • A control system for a variable-displacement hydraulic pump having an adjustment device and being electrical current-adjustable as required for supplying pressure to a first hydraulic apparatus (13), and pressure-adjustable for supplying pressure to a second hydraulic apparatus (14), in which case the pressure rating and the setting of the pilot valve controlled by the second hydraulic apparatus (14) may be programmed by a control signal. The control system includes a first control valve (18) that can be actuated by the weight of the load of the first apparatus (13) and by a spring (23) when switching to a higher displacement, or by the pump pressure when switching to a lower displacement. The system further includes a second control valve (19) which can be exposed to a force corresponding to the control signal (25) when switching to a higher displacement, or to the pump pressure when switching to a lower displacement.
    • PCT No.PCT / EP95 / 00611 Sec。 371日期:1996年8月9日 102(e)日期1996年8月9日PCT提交1995年2月21日PCT公布。 WO95 / 23292 PCT公开号 日期1995年8月31日用于具有调节装置的可变排量液压泵的控制系统,并且对于向第一液压装置(13)供应压力所需的可电流调节,并且可压力调节用于向第二液压 装置(14),在这种情况下,由第二液压装置(14)控制的先导阀的压力等级和设定可由控制信号编程。 所述控制系统包括第一控制阀(18),所述第一控制阀(18)可以在切换到更高位移时由所述第一装置(13)的负载的重量和弹簧(23)致动,或者当切换到 排量较低 该系统还包括第二控制阀(19),当切换到更低的位移时,第二控制阀(19)可以暴露于与控制信号(25)相对应的力,当切换到更高的位移时,或者暴露于泵的压力。