PROBLEM TO BE SOLVED: To provide a rack shaft of which a strength is secured and a manufacturing cost can be reduced in a dual pinion type electric power steering device, and a method for manufacturing the rack shaft.SOLUTION: A rack shaft 10 for use in a dual pinion type electric power steering device is equipped with: a hollow first shaft 19 in which a first rack 22 for manual steering force transmission is formed; and a solid second shaft 20 in which a second rack 23 for steering auxiliary force transmission is formed and which is connected to the first shaft 19. A method for manufacturing the rack shaft 10 comprises: a plastic processing process in which the first rack 22 is plastically processed into the first shaft 19; a connection process in which after the plastic processing process, the second shaft 20 is connected to the first shaft 19; and a cutting process in which after the connection process, the second rack 23 is cut into the second shaft 20.

    【課題】デュアルピニオンタイプの電動パワーステアリング装置において、強度を確保しつつ製造コストの低減を図ることができるラックシャフトおよびラックシャフトの製造方法を提供すること。【解決手段】デュアルピニオンタイプの電動パワーステアリング装置に用いるラックシャフト10は、マニュアル操舵力伝達用の第1ラック22が形成された中空の第1軸19と、操舵補助力伝達用の第2ラック23が形成され、第1軸19に連結された中実の第2軸20とを備えている。ラックシャフト10の製造方法は、第1ラック22が第1軸19に塑性加工される塑性加工工程と、塑性加工工程後に第2軸20が第1軸19に対して連結される連結工程と、連結工程後に第2ラック23が第2軸20に切削加工される切削加工工程とを含んでいる。【選択図】図8


    Access

    Download


    Export, share and cite



    Title :

    RACK SHAFT AND METHOD FOR MANUFACTURING RACK SHAFT


    Additional title:

    ラックシャフトおよびラックシャフトの製造方法


    Contributors:

    Publication date :

    2015-11-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL , Bearbeiten oder Verarbeiten von Blechen, Metallrohren, -stangen oder -profilen ohne wesentliches Abtragen des Werkstoffs / B21K MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS , Herstellen von Schmiede- oder Presserzeugnissen aus Metall, z.B. Hufeisen, Nieten, Bolzen oder Rädern / B23K Löten , SOLDERING OR UNSOLDERING / F16H Getriebe , GEARING



    RACK SHAFT AND METHOD FOR MANUFACTURING RACK SHAFT

    SUZUKI MASATERU | European Patent Office | 2015

    Free access

    RACK SHAFT AND METHOD FOR MANUFACTURING RACK SHAFT

    YOSHIKAWA SHINRAKU / IDE NORIKAZU | European Patent Office | 2018

    Free access

    RACK SHAFT AND METHOD FOR MANUFACTURING RACK SHAFT

    SUZUKI MASATERU | European Patent Office | 2015

    Free access

    RACK SHAFT AND METHOD FOR MANUFACTURING RACK SHAFT

    YOSHIKAWA SANEYOSHI / IDE NORIKAZU | European Patent Office | 2018

    Free access

    RACK SHAFT AND METHOD FOR MANUFACTURING RACK SHAFT

    NARISAWA MASAMI / INAGAKI RYOTA / FUKUI MASATO | European Patent Office | 2016

    Free access