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    • 3. 发明授权
    • Variable-ratio hydraulic steering system
    • 可变比液压转向系统
    • US5850888A
    • 1998-12-22
    • US702708
    • 1996-09-03
    • Erhard BergmannManfred SchildmannGerhard Voss
    • Erhard BergmannManfred SchildmannGerhard Voss
    • B62D5/32
    • B62D5/32
    • The invention changes over to another steering ratio automatically and very safely on the transition from servo to emergency operation. In the steering system, only a few of the lines (13) link the metering pump (10) to one of the cylinder connections (7, 8) and in each of the other lines (13') there is a changeover unit (16) which also links the lines (13) to the cylinder connections (7, 8) or the delivery connection (6) depending on the method of operation. These steering systems are used in mobile systems, especially slow-moving vehicles.
    • PCT No.PCT / DE95 / 00246 Sec。 371日期1996年9月3日 102(e)1996年9月3日PCT PCT 1995年2月23日PCT公布。 公开号WO95 / 23723 日期1995年9月8日在从伺服到紧急运行的过渡中,本发明自动而非常安全地转换到另一个转向比。 在转向系统中,只有少数管线(13)将计量泵(10)连接到气缸连接件(7,8)中,并且在每个其它管路(13')中有一个切换单元(16 ),其还根据操作方法将线(13)连接到气缸连接(7,8)或输送连接(6)。 这些转向系统用于移动系统,特别是缓慢移动的车辆。
    • 4. 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。
    • 5. 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 steering system with load signal
    • 液压转向系统带负载信号
    • US5887429A
    • 1999-03-30
    • US860618
    • 1997-08-01
    • Erhard BergmannManfred SchildmannGerhard Voss
    • Erhard BergmannManfred SchildmannGerhard Voss
    • B62D5/097F16D31/02
    • B62D5/097
    • Conventional steering systems of this type have the disadvantage that the dynamic load signal flow is lossy which has a negative effect on the energy efficiency. Another disadvantage arises in steering systems with a closed-center design. When the steering cylinder is pulled by an external force, the steering cylinder moves in advance of the apportioned steering flow. In the present novel steering system, the adjusting angles of the primary adjustable throttles (12, 13, 14, 15, 16, 17) are matched in a novel way, so that in a steering range where the steering rotational speed is limited, the load signal flow is used for actuating the steering system. In this phase, the steering system then operates according to the open-center principle.
    • PCT No.PCT / DE96 / 00217 Sec。 371日期:1997年8月1日 102(e)日期1997年8月1日PCT提交1996年2月10日PCT公布。 出版物WO96 / 26099 日期1996年8月29日这种类型的常规转向系统的缺点是动态负载信号流是有损的,这对能效有负面影响。 具有闭合中心设计的转向系统也带来另一个缺点。 当转向缸被外力拉动时,转向缸在分配的转向流之前移动。 在本新颖的转向系统中,主调节节流阀(12,13,14,15,16,17)的调节角度以新颖的方式相匹配,使得在转向转速受限的转向范围内, 负载信号流用于启动转向系统。 在这个阶段,转向系统按照开放中心的原理运行。
    • 8. 发明授权
    • Hydraulic steering unit with load signal
    • 带负载信号的液压转向装置
    • US5771692A
    • 1998-06-30
    • US718488
    • 1996-09-27
    • Erhard BergmannManfred SchildmannGerhard Voss
    • Erhard BergmannManfred SchildmannGerhard Voss
    • B62D5/097F16D31/02
    • B62D5/097
    • A steering system having a first auxiliary branch line (23, 24) connecting a main line (6) to a return port (12); with a load line (22) connecting the first auxiliary branch line to a load port (13) and dividing the first auxiliary branch line into first (24) and second (23) flow paths. The main line includes an adjustable input throttle (20). The first flow path (24) includes an adjustable load throttle (27) and a second throttle (26) in series. The adjustable input throttle and the adjustable load throttle act in a same direction. The purpose of this control circuit is to raise the load port pressure level, so as to prevent relatively high power losses.
    • PCT No.PCT / DE95 / 00393 Sec。 371日期1996年9月27日第 102(e)1996年9月27日PCT 1995年3月23日PCT公布。 出版物WO95 / 26292 日期:1995年10月5日具有将主线(6)连接到返回端口(12)的第一辅助支线(23,24)的转向系统; 具有将第一辅助支线连接到负载端口(13)并将第一辅助支线分成第一(24)和第二(23)流动路径的负载线(22)。 主线包括可调输入节流阀(20)。 第一流路(24)包括可调负载节流阀(27)和第二节流阀(26)。 可调输入节流阀和可调负载节流阀在相同的方向上起作用。 该控制电路的目的是提高负载端口的压力水平,以防止相对较高的功率损耗。