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    • 3. 发明授权
    • Retractable running-board, especially for a railway car door
    • 可伸缩跑步板,特别适用于铁路车门
    • US4188889A
    • 1980-02-19
    • US903950
    • 1978-05-08
    • Michel Favrel
    • Michel Favrel
    • B61D23/02B60R3/02
    • B61D23/025
    • A movable step displaceable by means of an operating mechanism between a withdrawn position and a service position has an extension in the form of two transverse arms associated with two pairs of link-arms which are pivotally mounted on four shafts having horizontal and parallel axes. Two shafts are stationarily fixed on the floor of the railway car, the second shaft being set back from the first with respect to the car wall. The other two shafts are movable and attached respectively to the transverse arms near the point of connection of these arms to the step, and to the transverse arms at the ends which are pivotally attached to the rear link-arms. Stable immobilization of the step is achieved in the service position as a result of abutting application of the articulations of the transverse arms and of the rear link-arms against a stop.
    • 通过在撤回位置和使用位置之间的操作机构可移动的可移动台阶具有与两对连杆臂相关联的两个横向臂的形式的延伸部,两对连杆臂可枢转地安装在具有水平和平行轴线的四个轴上。 两个轴固定在铁路车厢的地板上,第二个轴相对于轿厢壁从第一个轴上回收。 其他两个轴可移动并分别附接到靠近这些臂与台阶的连接点的横向臂,以及可枢转地附接到后连杆的端部处的横向臂。 由于横向臂和后连杆臂的铰接件抵靠止动件的作用而在使用位置上实现了台阶的稳定固定。