Steering linkage structure of rear wheel steering device

摘要

A steering linkage structure of a rear wheel device may include a housing receiving a screw nut integrally and rotatably connected to a driving motor, a steering shaft inserted in the housing and having a lead portion coupled to the screw nut that rotates and being movable left and right in the housing by the screw nut, and linkages coupled to the steering shaft to connect both ends of the steering shaft to rear wheels, in which coupling portions where the linkages are coupled to the steering shaft are inserted and protrude into and out of the housing, such that when a bending load is applied, the coupling portions support the bending load and are in contact with the housing.

主权项

1. A steering linkage structure of a rear wheel device, comprising:
a housing receiving a screw nut integrally and rotatably connected to a driving motor; a steering shaft inserted in the housing and having a lead portion coupled to the screw nut that rotates, the steering shaft being movable left and right in the housing by the screw nut; linkages coupled to the steering shaft to connect both ends of the steering shaft to rear wheels, wherein:
coupling portions where the linkages are coupled to the steering shaft are inserted and protrude into and out of the housing, such that when a bending load is applied, the coupling portions support the bending load and are in contact with the housing,the steering shaft and the linkage are fastened with a screw, anda threaded tap is formed at both ends of the steering shaft, and a tap hole in which the threaded tap is inserted and thread-fastened is formed in the coupling portion of the linkage; a groove formed longitudinally around each of an inner circumference of the coupling portion of the linkage and an outer circumference of the steering shaft; a bushing fitted on the steering shaft; and projections formed on the bushing and inserted in the groove of the coupling portion of the linkage and the groove of the steering shaft.