The objective of the present invention is to reduce the impact of production variability in a radius of curvature of a rear surface of a rack bar, for example, while enlarging a region of contact with the rack bar. A concave surface (330) is used as a rack guide seat (32) sliding surface (33). In a YZ cross section perpendicular to an axial direction of a rack bar, the concave surface (330) includes: a pair of first arcuate surfaces (331A, 331B) which are disposed on a peripheral edge side (320) of the sliding surface (33), from two positions of contact TA, TB with a rack bar rear surface (22), the positions of contact TA, TB having line symmetry with respect to a straight line O3 joining a center O of a rack bar (20) with a bottom portion center C of the sliding surface (33), and which have line symmetry with respect to the straight line O3; and a pair of second arcuate surfaces (332A, 332B) which are disposed on a bottom portion side (321) of the sliding surface (33), from the positions of contact TA, TB, and which have line symmetry with respect to the straight line O3. With regard to gaps to the rack bar rear surface (22) in positions separated by the same distance from the positions of contact TA, TB, the gaps from the first arcuate surfaces (331A, 331B) are greater than the gaps from the second arcuate surfaces (332A, 332b).


    Access

    Download


    Export, share and cite



    Title :

    GEAR MECHANISM


    Additional title:

    GETRIEBE
    MÉCANISME D'ENGRENAGE


    Contributors:

    Publication date :

    2022-08-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F16H Getriebe , GEARING / B62D MOTOR VEHICLES , Motorfahrzeuge



    GEAR AND BICYCLE GEAR CHANGE MECHANISM INCLUDING GEAR

    YAMAMOTO TAKASHI | European Patent Office | 2017

    Free access

    Gear and bicycle gear change mechanism including gear

    YAMAMOTO TAKASHI | European Patent Office | 2019

    Free access

    Gear engagement mechanism

    NEELAPPA GANESHA | European Patent Office | 2016

    Free access

    Industrial gear mechanism

    ALLGAIER PETER / SCHNURR WOLFGANG | European Patent Office | 2015

    Free access

    GEAR LUBRICATION MECHANISM

    SHIWACHI HIROSHI / MIKITA AKIRA / HOSHIKAWA ATSUSHI | European Patent Office | 2018

    Free access