Patent ID: 8875835

Claim:
A vehicular rear wheel steering device, comprising: a housing configured to be installed on a vehicle body; a rod being non-turnable with respect to the housing and movably supported in an axial direction of the rod, with each of opposite ends of the rod connected to a rear wheel of a vehicle; a conversion mechanism arranged between the rod and the housing to convert a rotational drive force of a rotational drive device to a drive force in the axial direction of the rod; a first bush in tubular form disposed at a first end of the housing; a second bush in tubular form disposed at a second end of the housing; the first bush and the second bush being slidably engaged to an outer periphery of the rod and supporting the rod in a state to be movable in the axial direction of the rod; a rod supporting rigidity of the first bush determined to be lower compared to the rod supporting rigidity of the second bush; the first bush arranged with an elastic body being resilient and being configured to change shape in a radial direction of the rod; and the second bush arranged with an inner periphery protrusion at which the rod is configured to make a tilting movement, wherein the first bush is arranged with a predetermined first clearance defined in the radial direction of the rod between the housing and the first bush when the rear wheel steering device is inactive, the second bush is arranged with a predetermined second clearance defined in the radial direction of the rod between the rod and the second bush at a length from an end portion of the inner periphery protrusion in the first bush side to an end portion of the second bush in the first bush side when the rear wheel steering device is inactive, and the predetermined first clearance defined in the radial direction of the rod is larger compared to the predetermined second clearance defined in the radial direction of the rod.