公开(公告)号：US4424888A

公开(公告)日：1984-01-10

申请号：US227761

申请日：1981-01-23

申请人： Leslie C. Chouings

发明人： Leslie C. Chouings

IPC分类号： B60T7/20 ,  F16D51/20

CPC分类号： F16D51/20 ,  B60T7/206

摘要： In a shoe and drum brake wherein the shoes can move circumferentially of the drum between first and second limit positions and are biased towards the first limit positions, there is provided for transmitting force from an actuator to the shoes a lever or hydraulic device capable of transmitting the force unequally to the shoes. The larger force urges the shoes towards their second limit positions while the smaller force urges the shoes towards their first limit positions. During forward rotation of the drum, the shoes remain in their first limit positions and can be applied radially to the drum by movement of the actuator. When the drum is rotating in the reverse direction, the larger force moves the shoes circumferentially of the drum so that the actuator fails to apply the shoes to the drum and establish a braking torque.

摘要翻译： 在鞋和鼓式制动器中，其中鞋可以在第一和第二限位位置之间沿滚筒的周向移动并且朝向第一极限位置偏置，提供用于将来自致动器的力传递到鞋的能够传递的杆或液压装置 力量不平等的鞋子。 较大的力量促使鞋子朝向第二极限位置，而较小的力促使鞋子朝向其第一极限位置。 在滚筒正向旋转期间，鞋保持在其第一极限位置，并且可以通过致动器的移动径向地施加到滚筒。 当滚筒沿相反方向旋转时，较大的力使滚筒的圆周方向移动，使得致动器不能将鞋子施加到滚筒并建立制动扭矩。