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    • 2. 发明专利
    • Rolling element for continuously variable transmission and its manufacturing method
    • 连续可变传动的滚动元件及其制造方法
    • JP2003074660A
    • 2003-03-12
    • JP2001317761
    • 2001-10-16
    • Nippon Parkerizing Co LtdNissan Motor Co Ltd日本パーカライジング株式会社日産自動車株式会社
    • HIRAI EIJIOKUHATA MITSUHIROKINO NOBUOOTANI KEIZO
    • F16H15/38C23C28/02C25D5/14C25D5/50C25D7/00
    • PROBLEM TO BE SOLVED: To solve a problem of a toroidal type continuously variable transmission (CVT) that lowering of a fatigue life of a rolling element might occur since a bearing groove part of a power roller receives high surface pressure, traction force and radial directional load.
      SOLUTION: This rolling element is used for a CVT having such a construction that a power roller inner ring 7 is contacted with discs 3 and 12 through lubricating oil and, for example, a nickel (Ni) based coat with its coat thickness of 0.1-20 μm is applied to a bearing groove part 7a, which is a rolling surface of the power roller inner ring 7 of a rolling element. The possibility of micro metal-to-metal contact is lowered and penetration of hydrogen into a substrate is restrained by forming a protecting coat with low hydrogen permeability. Thus, short life peel-off due to hydrogen embrittlement is inhibited and the rolling fatigue life is improved.
      COPYRIGHT: (C)2003,JPO
    • 要解决的问题:为了解决由于动力辊的轴承槽部分承受高的表面压力,牵引力和径向定向的滚动体的疲劳寿命降低的环形型无级变速器(CVT)的问题 加载。 解决方案:该滚动元件用于具有动力辊内圈7通过润滑油和例如镍(Ni)基涂层与盘3和12接触的结构的CVT,其涂层厚度为0.1- 对作为滚动体的动力辊内圈7的滚动面的轴承槽部7a施加20μm。 微金属与金属接触的可能性降低,并且通过形成具有低透氢性的保护涂层来抑制氢进入基底的可能性。 因此,由于氢脆而使寿命短的剥离被抑制,并且轧制疲劳寿命得到改善。