STEERING DEVICE FOR VEHICLE CAPABLE OF SWITCHING FRONT TWO-WHEEL STEERING AND FRONT/REAR FOUR-WHEEL STEERING

摘要

PURPOSE: To prevent improper transfer or the like to transverse running or to front/rear 4-wheel steering by providing a detector of detecting a front wheel for whether in a right or left steering position, for whether tending to steer to the right or left and for whether in a prescribed steering angle or not, so that two steering modes can be switched only when a rear wheel is in a steering angle zero. ;CONSTITUTION: A limit switch LS₁ of detecting a front wheel F for whether to the right or left is provided in a center arm 10, and a switch LS₂ of detecting a steering operational direction of a steering handle 1 is provided in a steering shaft 1a. Further in front/rear bell cranks 9R, 9R, limit switches LS₃, LS₄ of detecting a steering position of the front/rear wheels F, R are provided, to detect, in the limit switch LS₃, the front wheel F for whether in a steering angle or not of a right/left prescribed range from a zero steering angle, and to detect, in the limit switch LS₄, the rear wheel R for whether in a zero steering angle or not. These signals are input to a control device C, to control supplying high pressure oil to hydraulic cylinders 4, 5 from a solenoid valve device SV.;COPYRIGHT: (C)1996,JPO