Switching device for a machine
    1.
    发明授权
    Switching device for a machine 失效
    一台机器的切换装置

    公开(公告)号:US06679281B1

    公开(公告)日:2004-01-20

    申请号:US10019084

    申请日:2001-12-26

    IPC分类号: F15B1308

    摘要: A switching device for a machine, especially a digger, has at least one supply connection and one useful connection in addition to at least one hydraulic accumulator. An on-off valve is arranged between the supply connection and the useful connection, and separates the supply connection at least partially from the useful connection in one of its switching positions, in addition to ensuring that the hydraulic accumulator is charged on the fluid side via the supply connection. In another switching position, the supply connection is connected to the useful connection. A substantial improvement relative to conventional switching devices is attained by being able to guarantee an emergency function before the machine is used to perform work.

    摘要翻译: 用于机器,特别是挖掘机的开关装置除了至少一个液压蓄能器之外还具有至少一个供应连接和一个有用的连接。 在供电连接和有用连接之间设置一个开关阀,除了确保液压蓄能器在流体侧经由 供电连接。 在另一个切换位置,供电连接被连接到有用的连接。 通过能够在使用机器进行工作之前确保紧急功能,可以获得相对于传统开关装置的实质性改进。

    Circuit arrangement
    2.
    发明授权
    Circuit arrangement 失效
    电路布置

    公开(公告)号:US07426884B2

    公开(公告)日:2008-09-23

    申请号:US10580197

    申请日:2004-12-08

    IPC分类号: F15B11/044 F15B11/20

    摘要: A circuit arrangement includes a load sensing system (LS) with individual loads (10,14) arranged in series forming a series section, and in parallel forming a parallel section. A hydraulic supply circuit (12) includes a supply pump (P) and a runback (16) for fluid. The load sensing system (LS) determines the highest load pressure in the series section and the parallel section. The loads of the parallel section can be actuated independently from the pressure level of the loads of the series section due to the highest load pressure being transferred as a control pressure to a valve unit (18) such that, as long as the load pressure of the parallel section is higher than the load pressure of the series section, the valve unit restricts the runback (16) so that the pressure of the supply pump (P) matches or exceeds the pressure required in the parallel section. Sufficient fluid pressure for the load in the parallel section is ensured independently of the number of loads in the series section.

    摘要翻译: 电路装置包括负载感测系统(LS),负载感测系统(LS)具有串联地形成串联部分并且平行地形成平行部分的各个负载(10,14)。 液压供应回路(12)包括用于流体的供给泵(P)和回流(16)。 负载感测系统(LS)确定了串联部分和并联部分中的最高负载压力。 由于作为控制压力被传递到阀单元(18)的最高负载压力,可以独立于串联部分的负载的压力水平致动并联部分的负载,使得只要负载压力 平行部分高于串联部分的负载压力,阀单元限制回程(16),使得供给泵(P)的压力匹配或超过并联部分所需的压力。 独立于串联部分中的负载数量,确保并联部分中的负载的足够的流体压力。