公开(公告)号：US20140083806A1

公开(公告)日：2014-03-27

申请号：US14035242

申请日：2013-09-24

申请人： Hitachi Sumitomo Heavy Industries Construction Crane Co., Ltd.

发明人： Tadashi MIYAZAKI

IPC分类号： B66D5/28

CPC分类号： B66D5/28 ,  B66D5/14 ,  B66D5/26

摘要： A winch braking device includes: a brake; a brake pedal; a reaction force-imparting element that imparts a reaction force to the brake pedal; a rotation link that rotates by interlocking with the foot operation at the brake pedal; a brake valve linked to the rotation link, that applies a secondary pressure to the brake in response to the foot operation at the brake pedal; and a tension spring, with one end thereof attached to the vehicle body at a predetermined position and another end thereof attached to the rotation link, that applies a force to the brake pedal along a direction opposite a direction of the foot operation. As the foot operation is performed at the brake pedal, the tension spring extends and a shortest distance between a rotational center of the rotation link and a central axis of the tension spring becomes smaller.

摘要翻译： 绞车制动装置包括：制动器; 制动踏板 向制动踏板施加反作用力的反作用力施加元件; 旋转连杆，其通过与制动踏板处的脚操作互锁而旋转; 连接到旋转连杆的制动阀，其响应于在制动踏板处的脚操作而向制动器施加二次压力; 以及拉伸弹簧，其一端在预定位置处附接到车体，另一端附接到旋转连杆，其沿着与脚操作方向相反的方向向制动踏板施加力。 当在制动踏板上进行脚踏操作时，拉伸弹簧延伸并且旋转连杆的旋转中心与拉伸弹簧的中心轴线之间的最短距离变小。