| 摘要 |
PURPOSE:To enable the characteristic to be maintained of a rear wheel steering angle symmetrically to right and left by controlling working fluid for its supply to and discharge from a rear wheel power cylinder by a spool valve member, urging it by a return spring to a side of the neutral position and enabling it to be adjusted. CONSTITUTION:A rear wheel steering device, having a power cylinder 30 steering a rear wheel 39 through an operating rod 33, controls working fluid from a supply pump 55b to be supplied to and discharged from the power cylinder 30 in accordance with the relative displacement in the axial direction of a spool valve member 42 in a sleeve valve member 41 supported to a housing 21 and moved in the axial direction being associated with the operating rod 33. The spool valve member 42 is slided to be displaced against a return spring 49 by a control piston 45 receiving a pressure of working fluid in accordance with a front wheel steering angle. Here the rear wheel steering device provides the return spring 49 so as to urge the spool valve member 42 to a neutral position side through the control piston 45 and fixes it so as to enable the position to be adjusted in the axial direction from the outside to a shaft part 42a of the spool valve member 42. |
