公开(公告)号：US5967737A

公开(公告)日：1999-10-19

申请号：US961697

申请日：1997-10-31

申请人： Leroy Ernest Kraske ,  Dennis Alan Schaal ,  Michael John Kieffer ,  Robert Gerard Mootz ,  Robert Paul Dressler

发明人： Leroy Ernest Kraske ,  Dennis Alan Schaal ,  Michael John Kieffer ,  Robert Gerard Mootz ,  Robert Paul Dressler

IPC分类号： E02F3/32 ,  E02F3/38 ,  E02F3/96 ,  B66F9/00

CPC分类号： E02F3/388 ,  E02F3/964

摘要： A backhoe boom lock for locking the boom to the swing frame during transporting and craning operations. The boom is provided with two upwardly open hooks that project on either side of the swing frame when the boom is retracted into its craning or transport positions. Two bell cranks are located on each side of the swing frame and are provided with transverse catches for engaging the upwardly open hooks. The bell cranks are biased downwardly by springs. A linkage for lifting the bell cranks against the biasing force of the springs extends from the bell cranks into the interior of the operator's cab. The linkage is provided with a control lever, located inside the operator's cab for lifting the bell cranks. After the boom has been retracted into its transport or craning position, the control lever is released and the bell cranks rotated by the biasing springs so that the catches engage the upwardly open hooks on the boom.

摘要翻译： 一个反铲吊杆锁，用于在运输和起重作业期间将吊臂锁定到摆动框架。 起重臂设置有两个向上开的钩，当吊杆缩回到其起重或运输位置时，两个向上开的钩突出在摆动框架的两侧。 两个钟形曲柄位于摆动框架的每一侧，并且设置有用于接合向上打开的钩的横向卡钩。 钟形曲柄由弹簧向下偏压。 抵抗弹簧的偏压力提升喇叭曲柄的连杆从钟形曲柄延伸到驾驶室的内部。 该联动装置设置有一个控制杆，位于驾驶室内部以提升铃声。 在悬臂已经缩回到其运输或起重位置之后，控制杆被释放，并且钟形曲柄通过偏置弹簧旋转，使得卡扣与吊杆上的向上打开的钩接合。