Patent ID: 8768581
Filing Date: 2014-07-01
Classification: B66C,E02F

Abstract:
1. A safety system for a working machine provided with an undercarriage, a working machine main body mounted on the undercarriage, a front working mechanism attached pivotally in an up-and-down direction to the working machine main body, and a controller for controlling these undercarriage, working machine main body and front working mechanism, wherein: the controller is provided with a ZMP calculating means for calculating coordinates of a ZMP by using position information, acceleration information and external force information on respective movable portions of the main body, which includes the front working mechanism, and undercarriage, and a stability computing means for calculating a support polygon formed by plural ground contact points of the working machine with a ground, and, when the ZMP position is included in a warning region formed inside a perimeter of the support polygon, producing a tipping warning; the safety system is provided with a display for displaying a top plan view of the working machine and the ZMP position of the working machine relative to the support polygon; the ZMP calculating means and stability computing means compute and display the ZMP position and the support polygon including the warning region therein; and the safety system produces the tipping warning when the calculated ZMP position is included in the warning region formed inside the perimeter of the support polygon.