| 摘要 |
PROBLEM TO BE SOLVED: To provide a device having the function of a four wheel drive and capable of easily performing the advancement and the sidewise shift in a narrow space by interlockingly changing both front and rear wheels of a trailer according to the turning degree of a cab-over tractor to reduce the minimum turning radius when the trailer is attached to the cab-over tractor. SOLUTION: When a cab-over tractor makes a forward right turn, a front side 4WS turntable 14 is turned to the right, and a rear side turntable 15 is turned to the left by the effect of steering wires 10, 11 of the 4WS turntable connected between the front side 4WS turntable and the rear side 4WS turntable 15. Due to the similar effect, also when the cab-over tractor makes the forward left turn, the backward right turn, and the backward left turn, the front and rear wheels of the trailer are turned opposite to each other and the turning radius can be reduced. A connection piece slide device 1 is provided on a rear part of the cab-over tractor, and a connection pipe to the trailer is slidable in the right-to-left direction by a hydraulic cylinder. COPYRIGHT: (C)2007,JPO&INPIT
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