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    • 9. 发明授权
    • Electric power steering system
    • 电动助力转向系统
    • US09580101B2
    • 2017-02-28
    • US14755391
    • 2015-06-30
    • JTEKT CORPORATION
    • Naofumi Kawamura
    • B62D5/04F16D1/072F16D1/08
    • B62D5/0409F16D1/072F16D1/0858
    • An electric power steering system includes an electric motor and a worm speed reducer. The worm speed reducer includes a worm shaft, a worm wheel, and a ring member. The worm wheel includes an annular tooth portion and an annular support formed of a material that is softer than a material of a shaft. The ring member includes an outer periphery press-fitted with the annular support so as to form plastically deformed portions in part of the annular support, and an inner periphery with which the shaft is press-fitted. The ring member is formed of a material with a hardness equivalent to a hardness of the material of the shaft.
    • 电动助力转向系统包括电动马达和蜗轮减速器。 蜗杆减速机包括蜗杆轴,蜗轮和环件。 蜗轮包括环形齿部和由比轴的材料更软的材料形成的环形支撑件。 环形构件包括与环形支撑件压配合的外周,以在环形支撑件的一部分中形成塑性变形部分,以及内周,轴被压配合。 环形构件由硬度等于该材料的硬度的材料形成。