A rack bar (11) includes: a rack tooth row (112) including a plurality of rack teeth (111) meshing with pinion teeth (9a); a hardened layer (K) provided continuously over an entire circumference of the rack tooth row (112); and a center portion (S) provided inside the hardened layer (K) and having lower hardness than the hardened layer (K). When the rack bar (11) is viewed in an axial direction of the rack bar (11), a depth of the hardened layer (K) from the following positions i), ii), and iii) increases in this order: i) a bottom land (111v) of the rack teeth (111); ii) a side (Ills) of the rack bar (11) relative to the bottom land (111v); and iii) a back (111b) of the rack bar (11) relative to the bottom land (111v).


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    Title :

    RACK BAR AND STEERING APPARATUS


    Additional title:

    ZAHNSTANGE UND LENKVORRICHTUNG
    BARRE DE CRÉMAILLÈRE ET APPAREIL DE DIRECTION


    Contributors:

    Publication date :

    2022-08-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / F16H Getriebe , GEARING



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