Patent ID: 8352145

Claim:
A traction control device of a construction machine comprising a braking mechanism provided to each of wheels and a differential adjusting mechanism for adjusting a differential between front and rear wheels, the traction control device controlling the differential adjusting mechanism, the traction control device comprising: a rotation speed detector that detects a rotation speed of each of the wheels; and a controller having a processor, the controller being configured to access at least a first and second threshold, the first threshold corresponding to a rotation speed difference between the right and left wheels, the second threshold corresponding to a rotation speed ratio between the right and left wheels, and the controller comprising: a control-start determiner that determines whether or not to control the differential adjusting mechanism based on the detected rotation speed of each of the wheels; and a differential adjusting mechanism controller that controls the differential adjusting mechanism based on a result of the determination of the control-start determiner, wherein the control-start determiner comprises: a right-left-wheel rotation speed difference calculating section that calculates a rotation speed difference between right and left wheels; a right-left-wheel rotation speed ratio calculating section that calculates a rotation speed ratio between the right and left wheels; and a control-start determining section that determines to start controlling the differential adjusting mechanism for adjusting the differential between the front and rear wheels when the rotation speed difference between the right and left wheels reaches or exceeds the first threshold for right-left-wheel rotation speed difference or when the rotation speed ratio between the right and left wheels reaches or exceeds the second threshold for right-left-wheel rotation speed ratio.