公开(公告)号：WO2020154765A1

公开(公告)日：2020-08-06

申请号：PCT/AU2020/050057

申请日：2020-01-29

Applicant: WESTFIELD NOMINEES PTY LTD

Inventor： DALLA RIVA, Peter Andrew

IPC: B66C23/36 ,  B66C23/88 ,  B60G17/005 ,  B60G17/0165

Abstract: A pick and carry crane (10) comprises a chassis (11) having a front chassis portion (12), a rear chassis portion (13), and a front suspension system (29) supporting the front chassis portion (12) on a front axle (31). The front suspension system (29) comprises a suspension device such as a hydraulic cylinder (43) selectively operable in a mode to automatically vary suspension height as required. A planarity sensor (103) is provided to sense a spatial relationship of the front chassis portion (12). A controller (113) is provided to receive signals from the planarity sensor (103) and control operation of the front suspension system (29) accordingly to compensate for a variation from a permissible condition. The front suspension system (29) may comprise two hydraulic cylinders (43), one corresponding to each side of the front chassis portion 12. Each hydraulic cylinder (43) may function variously as a shock absorbing cylinder, a levelling cylinder, or a rigid link. A method of operating a pick and carry crane (10) is also disclosed.