PROBLEM TO BE SOLVED: To provide a reduction gear for an electric power steering device which is excellent in quietness, abrasion resistance, dimension stability, and heat resistance, and to provide an electric power steering device.SOLUTION: A gear reducer 30 of an electric power steering device includes: a worm 32 to which a steering assisting force output from an electric motor 13 is transmitted; and a worm wheel 31 which meshes with the worm 32 to transmit the steering assisting force to a steering shaft 11. The worm wheel 31 comprises: a core tube 41; and an annular resin part 42 integrally provided with an outer periphery part of the core tube 41 and in which gear teeth 43 are formed on an outer peripheral surface. The resin part 42 is formed by a resin material containing aromatic polyamide 11.SELECTED DRAWING: Figure 3

    【課題】静音性、耐摩耗性、寸法安定性、及び耐熱性に優れる電動パワーステアリング装置用減速ギヤ及び電動パワーステアリング装置を提供する。【解決手段】電動パワーステアリング装置の歯車減速機30は、電動モータ13から出力された操舵補助力が伝達されるウォーム32と、ウォーム32に噛み合い操舵補助力をステアリング軸11に伝達するウォームホイール31と、を備えている。ウォームホイール31は、芯管41と、芯管41の外周部に一体的に設けられ外周面にギヤ歯43が形成された環状の樹脂部42と、で構成されており、樹脂部42は、半芳香族ポリアミド11を含有する樹脂材料で構成されている。【選択図】図3


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    Title :

    REDUCTION GEAR FOR ELECTRIC POWER STEERING DEVICE AND ELECTRIC POWER STEERING DEVICE


    Additional title:

    電動パワーステアリング装置用減速ギヤ及び電動パワーステアリング装置


    Contributors:

    Publication date :

    2016-04-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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