公开(公告)号：US4577884A

公开(公告)日：1986-03-25

申请号：US605461

申请日：1984-04-30

申请人： Joe L. Harris

发明人： Joe L. Harris

IPC分类号： B60D1/06 ,  B60D1/60 ,  B60D1/12

CPC分类号： B60D1/583 ,  B60D1/065 ,  B60D1/60 ,  Y10T70/5889

摘要： A device for preventing unauthorized intentional uncoupling or accidental uncoupling of a trailer from a towing vehicle. The threaded shaft of the ball slides through an upper housing allowing the upper housing to contain the shoulder of the ball so that the ball and upper housing can be mounted to a tow bar by inserting the threaded shaft of the tow ball through the aperture in a tow bar and then screwing a flanged nut onto the threaded shaft. A lower housing is then placed around the flanged nut and bolted to the upper housing so that the tow bar and the flanged portion of the flanged nut are sandwiched between the upper and lower housings. There is a yoke which encircles the shank of the tow ball, the dimensions of which make it impossible for it to slide over the ball. There is a locking hat which is placed over the trailer tongue ball socket having legs extending vertically downward allowing it to be locked to the yoke. Once in locked position, the trailer hitch cannot be disengaged without first unlocking and removing the locking hat. The locking hat and yoke do not limit the inherent rotation of the socket about the ball.

摘要翻译： 一种用于防止拖车从牵引车辆的未经授权的故意解耦或意外脱离的装置。 球的螺纹轴通过上壳体滑动，允许上壳体容纳球的肩部，使得球和上壳体可以通过将丝杆的螺纹轴插入孔中而安装到拖杆上 拖杆，然后将法兰螺母拧到螺纹轴上。 然后将下壳体放置在带凸缘的螺母周围并螺栓连接到上壳体，使得牵引杆和凸缘螺母的凸缘部分夹在上壳体和下壳体之间。 有一个轭，它围绕拖曳球的柄，其尺寸使得它不可能在球上滑动。 有一个锁帽，放置在拖车舌球窝的上方，脚座垂直向下延伸，使其能够锁定到轭架上。 一旦处于锁定位置，拖车挂钩在没有首先解锁并卸下锁帽的情况下不能脱开。 锁帽和轭不限制插座围绕球的固有旋转。