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1. 发明授权

US4215755A Power transmission mechanisms 失效
标题翻译：动力传动机构
公开(公告)号：US4215755A
公开(公告)日：1980-08-05
申请号：US953791
申请日：1978-10-23
申请人： Norman Waterworth , Eric A. Whateley , Gerald A. Shipley , John McKnight
发明人： Norman Waterworth , Eric A. Whateley , Gerald A. Shipley , John McKnight
IPC分类号： B62D11/12 , B62D11/10
CPC分类号： B62D11/12
摘要： A variable-ratio power transmission mechanism having two output shafts for driving respective wheels or tracks at opposite sides of a heavy off-the-road vehicle, and having a steering mechanism for varying the relative rotational speeds of said shafts, is known. Where the steering mechanism includes a null shaft which is not driven when straight-line travel is required, said shaft has been driveable by hydrostatic means, but these have sometimes proved unreliable. It is therefore proposed to drive the null shaft by mechanical two-speed gearing driven from the input of the power transmission mechanism. The null shaft is selectively driveable by said gearing in either direction of rotation through the appropriate one of two progressively engaging clutches until it attains a first speed, and an epicyclic reduction gear in said gearing is then locked up to drive the null shaft in the same direction at a higher speed.
摘要翻译：已知具有用于驱动重型越野车辆的相对侧的相应车轮或轨道的两个输出轴以及具有用于改变所述轴的相对转速的转向机构的可变比动力传递机构。当转向机构包括一个空转轴时，在需要直行行驶时不驱动该轴，所述轴可以通过静液压装置驱动，但这些有时被证明是不可靠的。因此，提出通过从动力传递机构的输入驱动的机械式双速传动装置驱动无效轴。无效轴可以通过所述传动装置在两个逐渐接合的离合器中的适当的一个离合器中的任一个旋转方向上选择性地驱动，直到达到第一速度，然后将所述传动装置中的行星齿轮减速齿轮锁定以驱动相同的零轴方向在更高的速度。

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