| 摘要 |
<p>An improved knuckle boom crane apparatus provides a supportive base and a frame attached to the base, the frame including a cabin with an interior. A prime mover is supported upon the frame. A main boom is pivotally attached to the frame at a first boom end portion, the main boom having a second end portion. A jib boom is provided having first and second end portions, the jib boom first end portion being pivotally attached to the main boom second end portion, the jib boom second end portion being a free end portion. A main block is attached to the main boom and depending from the main boom second end portion. An auxiliary block is attached to the jib boom and depending from the jib boom second end portion. A main block parking area is provided next to the connection of main boom and jib boom that enables the main block to be parked when using the auxiliary block of the jib boom. The parking area enables the jib boom auxiliary block to lift a selected package without dismantling of the main block. The jib boom articulates relative to the main boom with a specially configured rack gear and pinion gear arrangement or interface.</p> |
