| 摘要 |
PURPOSE:To improve mobility at low speed and steering stability at middle and high speed by a method wherein a transmission which transmits a front wheel steering force to a rear wheel steering device is provided between the front wheel steering device and the rear wheel steering device. CONSTITUTION:A front wheel steering device is made by joining a pitman arm 7 of a power steering gear 6 which is supplied with pressure oil from a hydraulic pump 5a and a steering arm 3 with a drag link 8. On the other hand, a rear wheel steering device is composed by joining a power cylinder 12 between a tie rod 11a and a body, and pressure oil from a hydraulic pump 5b is supplied to the power cylinder 12 via a valve 13 which controls switching of right and left steering. In this case, a transmission 14 for controlling the valve 13 is provided with respect to steering of front wheels 1, which can switch over three kinds of transmission modes with a shift cylinder 43 using this switching controlling computer 21 via a switch valve 19. |
