A double relationship direction mechanism. (Machine-translation by Google Translate, not legally binding)

摘要

A double-ratio steering mechanism, for transferring the rotation of a steering wheel, operable by hand, to the steering shaft, rotatable, and a vehicle steering assembly, characterized in that it comprises, in combination: a tubular member surrounding a part of said steering shaft and having fixed to the vehicle its remote end of said steering wheel; a box surrounding the said tubular member, fixed to the other end thereof and extending in a generally radial direction outward from the tubular member and in the direction of said steering wheel, to enclose practically the intermediate space, an opening in the upper portion of said box, which includes a pair of recesses arranged in a substantially perpendicular relationship on one side thereof; said steering shaft extends from said tubular member into said box and has an end disposed therein; a bearing member having a cylindrical portion closely surrounding said end of the steering shaft and which is keyed thereto to rotate therewith, said bearing member comprising a shoulder portion, extended in a generally radially outward direction and having a plurality of gear teeth extended outwardly around the periphery of the flange; said steering wheel has a central cylindrical section extending into said crate and is arranged in spaced relation radially outwardly with respect to said cylindrical portion of the bearing member, said cylindrical section having a plurality of keys axially extended on its external surface; an annular, antifriction bearing assembly disposed between said central section of the steering wheel and said cylindrical portion of the bearing member; an annular gear which surrounds said cylindrical section of the steering wheel and which has a radially inwardly extended portion, with internal keys axially extended and which are in contact with said external keys on said cylindrical section, allowing said gear can be rotatable with said steering wheel and axially slidable relative to it, said ring gear comprising: an annular groove, facing outwards, and a plurality of gear teeth, extended inwardly, which are complementary to the teeth of said bearing member and are adapted to mesh axially therewith; a plurality of pegs mounted in circumferentially spaced relation on the flange portion of said support member and extending axially therefrom, in a direction away from said steering wheel; a planetary gear mounted rotatably on each of said spikes and having outwardly extended teeth, spaced axially from said teeth of the supporting member and in axial alignment with them, the teeth of each of said planetary gears being complementary to the teeth of said annular gear and being adapted to mesh axially with them; the axial width of the teeth of said annular gear is greater than the axial spacing between the teeth of said bearing member and the teeth of said planetary gear, in order to allow said teeth of the annular gear to mesh axially with the teeth of said planetary gears before being completely out of engagement with the teeth of said supporting member; the lateral edges of the teeth of said bearing member adjacent to said planetary gears are bevelled inward towards said planetary gears, to facilitate the transfer of said teeth of the annular engagement gear with the teeth of the bearing member to engagement with the teeth. teeth of the planetary gear; an annular solar gear, mounted rigidly on an internal portion of said box and surrounding a portion of said steering shaft, the annular gear having teeth extended outwardly on its periphery, which are complementary to the adjacent teeth of each of the cited planetary gears and are in mesh with them; a change assembly for selectively moving in the axial direction said annular gear between a first position, in which it is in meshing contact with said bearing member, and a second position, in which it is in meshing contact with the cited planetary gears, said set of change comprising: a fork member disposed within said case, surrounding a portion of said annular gear, said fork member comprising spikes aligned laterally on the lower end thereof, which extend into said annular groove of the annular gear and are slides inside it; a pair of pivot grooves on each side, which are out of lateral alignment and biased relative to the longitudinal axis of said fork member; Y a vertical portion on the upper end thereof, which has a threaded hole on the inside and is adapted to be slidably received in said recesses of the box; said box has a pair of pivot pins, extended inward, arranged in said pivot grooves and having a size essentially smaller than the length of said grooves, in order to allow said fork member to be pivoted about said pins of the box about an axis essentially perpendicular to the axis of said steering shaft and to be tilted in said pins about an axis essentially parallel to said axis of the steering shaft; a shift lever having a threaded end inside said hole of the vertical portion of the fork, which extends out of said opening of the box and which has at the other end a button that can be grasped by hand; a flexible and elastic boot mounted at one end of said box and at the other end of said shift lever, to serve as a dust protector for said opening of the box; an annular member disposed within the opening of said case and rotatably mounted on said shift lever near said vertical portion of the fork; Y a coil spring member, having one end mounted on said annular member and the other end mounted on a portion of said box, defining a portion of said opening thereof away from said recesses therein, said spring member arranged in such a way, with respect to said recesses, which serves to normally retain said vertical portion of the fork in any of said recesses, when it is located inside one of them. (Machine-translation by Google Translate, not legally binding)