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    • 33. 发明授权
    • Free rotation control apparatus for a hoist and traction machine
    • 起重和牵引机的自由旋转控制装置
    • US5472171A
    • 1995-12-05
    • US107153
    • 1993-08-17
    • Yoshio NishiHaruo KubotaYasuo WadaYoshio UenoMunenobu Honda
    • Yoshio NishiHaruo KubotaYasuo WadaYoshio UenoMunenobu Honda
    • B66D3/14B66D1/14F16D7/02
    • B66D3/14
    • A hoist and traction machine having a mechanical brake (13), wherein a not-relative (14)-rotatable operating handle (18) is axially movably an interposed between a stopper (17) provided at an axial end of a driving shaft (5) and a driving member (8) threadedably engaged with the driving shaft (5). Between the operating handle (18) and the stopper (17) there is provided an elastic biasing member (19) for biasing the operating handle (18) toward the driving member (8) The operating handle (18) is provided with engaging projections (31), the driving member (8) is provided with free rotation control surfaces (35) in elastic contact with the engaging projections (31) respectively, and the free rotation control surfaces (35) are formed in gradient surfaces for applying resistance against movement of the driving member (8) in the return direction with respect to free rotation operation by the operating handle (18) so as to enable the free rotation control state to be held up to a desired value, whereby an input range of a pulling force of a chain during the free rotation control is expanded without reducing operability of free rotation operation.
    • 一种具有机械制动器(13)的提升和牵引机械,其中不可旋转的(14)可转动的操作手柄(18)可轴向移动,插入在设置在驱动轴(5)的轴向端部处的止动件 )和与所述驱动轴(5)螺纹接合的驱动构件(8)。 在操作手柄(18)和止动器(17)之间设置有用于将操作手柄(18)朝向驱动构件(8)偏置的弹性偏置构件(19)。操作手柄(18)设置有接合突起 如图31所示,驱动构件(8)分别设置有与接合突起(31)弹性接触的自由旋转控制表面(35),并且自由旋转控制表面(35)形成在梯度表面中以施加抵抗运动 相对于操作手柄(18)的自由旋转操作而沿着返回方向驱动驱动构件(8),以使得自由旋转控制状态能够保持到期望值,由此拉动力的输入范围 在自由旋转控制期间链条被扩展而不降低自由旋转操作的可操作性。