Speed change controller of running hydraulic motor
    1.
    发明授权
    Speed change controller of running hydraulic motor 失效
    运行液压马达变速控制器

    公开(公告)号:US5323611A

    公开(公告)日:1994-06-28

    申请号:US838232

    申请日:1992-03-23

    申请人: Nobukazu Kotake

    发明人: Nobukazu Kotake

    摘要: The present invention relates to an apparatus for controlling the running speed of a hydraulic motor. A hydraulic motor employable for a construction machine such as a power shovel or the like as a driving power source is constructed such that its rotational speed can be changed to assume either a high speed (low torque) or a low speed (high torque) so as to cope with differences in the running state of the construction machine. The apparatus of the subject invention assures that the running state of the construction machine is determined by not only the running load of a hydraulic motor but also its rotational speed, whereby the construction machine can run smoothly at all times.

    摘要翻译: PCT No.PCT / JP89 / 00887 Sec。 371日期:1992年3月23日 102(e)1992年3月23日PCT PCT 1989年8月30日PCT公布。 出版物WO91 / 03651 1991年3月21日公开本发明涉及一种用于控制液压马达的运行速度的装置。 可用于诸如铲车等的施工机械的液压马达作为驱动动力源被构造成使得其转速可以改变为高速(低扭矩)或低速(高扭矩)等) 以应对施工机械运行状态的差异。 本发明的装置确保了施工机械的运行状态不仅由液压马达的运行负载而且决定其转速,从而施工机器可以始终平稳地运行。

    Control system for hydraulic drive
    2.
    发明授权
    Control system for hydraulic drive 失效
    液压驱动控制系统

    公开(公告)号:US6059534A

    公开(公告)日:2000-05-09

    申请号:US117687

    申请日:1998-08-03

    摘要: A hydraulic drive to, for example, a wheeled excavator comprises two motors (4, 6) connectable to the input side of a gearbox (8) whereby each motor (4, 6) can apply a driving force to a load connected to the output side of the gearbox (8), one motor (6) being selectively disconnectable from the load independently of the other motor (4) by means of a clutch (10). A control system for effecting said disconnection comprises a hydraulic pump (20) drive n by the gearbox (8) to be rotated at a speed proportional to that of the other motor (4), pressure-sensing means (24) for detecting the pressure of fluid displaced by the pump (20), and control means (28) for achieving selective actuation of the clutch (10) such that, when the sensing means (24) detect a pressure associated with a predetermined speed of the other motor (4) at which the drive from the one motor (6) becomes redundant, the control means (28) operate to disconnect the one motor from the gearbox (8).

    摘要翻译: PCT No.PCT / GB97 / 00299 Sec。 371日期1998年8月3日 102(e)日期1998年8月3日PCT提交1997年2月3日PCT公布。 公开号WO97 / 29308 PCT 日期1997年8月14日例如对于轮式挖掘机的液压驱动器包括可连接到齿轮箱(8)的输入侧的两个马达(4,6),由此每个马达(4,6)可以将驱动力施加到 连接到变速箱(8)的输出侧的负载,通过离合器(10)可独立于另一个电动机(4)选择性地与负载分离的一个电动机(6)。 用于实现所述断开连接的控制系统包括由齿轮箱(8)驱动的液压泵(20)以与另一个电动机(4)成比例的速度旋转;用于检测压力的压力感测装置(24) 通过泵(20)移位的流体和用于实现离合器(10)的选择性致动的控制装置(28),使得当感测装置(24)检测到与另一个马达(4)的预定速度相关联的压力 ),其中来自一个电动机(6)的驱动器变得冗余,控制装置(28)操作以将一个电动机与变速箱(8)断开。