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    • 5. 发明授权
    • Removable trailer hitch ball
    • 可拆卸拖车挂钩球
    • US06241271B1
    • 2001-06-05
    • US09099610
    • 1998-06-18
    • Jacob S. Belinky
    • Jacob S. Belinky
    • B60D106
    • B60D1/06B60D1/52
    • A removable trailer hitch ball in which a generally spherical configuration hollow ball with opposed upper and lower vertically aligned bore holes for removable attachment to a stud with a cross bore aligned with transversely aligned holes on opposite sides of the hollow ball. A removable lock pin with a spring loaded detent ball is inserted through the transversely aligned holes of the hollow ball and stud. The spring loaded detent ball is protruded into a cavity between the side of the stud and the inner wall of the hollow ball to detachably secure the hollow ball onto the stud which may be integrally formed at the end of a drawbar for detachable connection to a receiver of a trailer hitch. Different size balls may be detachably secured to a given stud. In one embodiment the stud is formed in a shank integrally at one end of a drawbar. The hollow ball can be formed into a generally spherical configuration from a swagged cylindrical metal tube cut to length that is in a split swagging die having a mandrel extending inwardly from a bowl in one die to form the vertically aligned bore holes.
    • 一种可移动的挂车挂钩,其中具有相对的上和下垂直对准的钻孔的通常为球形的中空球,用于可拆卸地附接到具有与空心球的相对侧上的横向对准的孔对准的螺柱的螺柱。 具有弹簧加载的止动球的可拆卸锁定销通过中空球和螺柱的横向对准的孔插入。 弹簧加载的止动球突出到螺柱的侧面和中空球的内壁之间的空腔中,以将中空球可拆卸地固定到螺柱上,螺柱可以整体地形成在牵引杆的端部,用于可拆卸地连接到接收器 的拖车搭便车。 不同尺寸的球可以可拆卸地固定到给定的螺柱。 在一个实施例中,螺柱在牵引杆的一端处一体地形成在柄部中。 中空球可以形成为大体上球形的构型,其从被切割成具有在一个模具中从碗中向内延伸的心轴的分开的甩动模具中的膨胀的圆柱形金属管形成,以形成垂直对准的钻孔。