公开(公告)号：US06256835B1

公开(公告)日：2001-07-10

申请号：US09453269

申请日：1999-12-02

申请人： Paul C.S. Wang

发明人： Paul C.S. Wang

IPC分类号： B60B3300

CPC分类号： B60B33/001 ,  B60B33/0021 ,  B60B33/0028 ,  B60B33/0042 ,  B60B33/0049 ,  B60B33/0057 ,  B60B33/0068 ,  B60B33/0073 ,  B60B33/0086 ,  B60B33/0094 ,  B60B33/021 ,  Y10T16/195 ,  Y10T16/196

摘要： A caster includes a wheel body having a hub portion and an axle extending from the hub portion. Lock engaging members are disposed around the hub portion. An upright mounting frame includes a lower mounting portion journalled to the axle, and an upper mounting portion extending upwardly from the lower mounting portion. The upper mounting portion is spaced apart from the wheel body to define an upright passage therebetween. A support frame is movable relative to the mounting frame, and includes an upper force transmitting member to support a load. A confining member extends downward from the upper force transmitting member into the upright passage, and has an outer wall facing the wheel body. A spring member biases the upper force transmitting member to move upwardly and away from the mounting frame. The lock member is disposed on the outer wall and faces towards the lock engaging members such that when the upper force transmitting member is under load, the confining member will move downwardly to bring the lock member to engage one of the lock engaging members against the biasing action of the spring member, thereby braking the wheel body from rotation.

摘要翻译： 脚轮包括具有毂部分的轮体和从轮毂部分延伸的车轴。 锁定接合构件围绕毂部设置。 直立安装框架包括安装在轴上的下安装部分和从下安装部分向上延伸的上安装部分。 上部安装部分与轮体间隔开，以在其间限定直立通道。 支撑框架相对于安装框架可移动，并且包括用于支撑负载的上部力传递构件。 限制构件从上力传递构件向下延伸到直立通道中，并且具有面向车轮主体的外壁。 弹簧构件偏压上力传递构件以向上移动并远离安装框架。 锁定构件设置在外壁上并面向锁定接合构件，使得当上部力传递构件处于负载状态时，限制构件将向下移动，以使锁定构件抵抗偏置的锁定构件 弹簧构件的作用，从而制动车轮转动。