公开(公告)号：US5261290A

公开(公告)日：1993-11-16

申请号：US937151

申请日：1992-08-31

申请人： Lawrence A. Ramsay ,  Leonard Bergman ,  Thomas R. Fox

发明人： Lawrence A. Ramsay ,  Leonard Bergman ,  Thomas R. Fox

IPC分类号： F16H59/06 ,  G05G5/16 ,  F16H59/02 ,  G05G5/03

CPC分类号： G05G5/16 ,  F16H59/06 ,  Y10T74/2014 ,  Y10T74/20171 ,  Y10T74/2066

摘要： A control lever system for actuating the hydraulic pump of a hydrostatic transmission system of an agricultural vehicle includes a lever having a hand grip portion for actuation by the operator. The lever passes through an elongate slot in a console surface to control its movement. A lower end of the lever is connected to the pump. A friction resistance system is applied to the lever to generate a frictional force resisting the natural restoring force of the pump tending to move to the neutral postion. The friction resistance is applied only over the length of the slot relating to the forward movement of the pump so that there is no action at the neutral position or in reverse. The friction resistance includes a friction multiplier generated by a sub-lever portion pivotally mounted on the lever and biased by spring action when in contact with an abutment member to pinch a friction band so that the friction force generated by the band is greater than the spring action. The lever is shaped by an offset and by the inclination of the hand grip portion so that when pushed or pulled to move the lever from a set position the frictional resistance is reduced during movement and then automatically reapplied when the lever is released.

摘要翻译： 用于致动农用车辆的静液压传动系统的液压泵的控制杆系统包括具有用于由操作者致动的手柄部分的杆。 杠杆通过控制台表面的细长槽来控制其运动。 杠杆的下端连接到泵。 摩擦阻力系统施加到杠杆以产生抵抗泵的自然恢复力的摩擦力，倾向于移动到中性位置。 摩擦阻力仅在与泵的向前运动相关的槽的长度上施加，使得在中性位置或反向不起作用。 摩擦阻力包括由可枢转地安装在杠杆上的副杠杆部分产生的摩擦倍增器，并且当与抵靠构件接触以夹紧摩擦带时由弹簧作用而偏置，使得由带产生的摩擦力大于弹簧 行动。 杠杆通过偏移和手柄部分的倾斜度成形，使得当被推动或拉动以使杠杆从设定位置移动时，摩擦阻力在移动期间减小，然后当释放杆时自动重新应用。