发明申请
- 专利标题： Shell type needle roller bearing, support structure for compressor spindle, and support structure for piston pump driving portion
- 专利标题（中）： 外壳式滚针轴承，压缩机主轴支撑结构，活塞泵驱动部分支撑结构
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申请号： US12453371申请日： 2009-05-08
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公开(公告)号： US20090218457A1公开(公告)日： 2009-09-03
- 发明人: Shinji Oishi , Masatoshi Niina
- 申请人： Shinji Oishi , Masatoshi Niina
- 优先权： JP2003-323240 20030916; JP2003-323259 20030916; JP2003-323278 20030916; JP2003-331855 20030924; JP2003-336878 20030929
- 主分类号： F16M11/00
- IPC分类号： F16M11/00 ; B21D53/10
摘要：
A shell type outer ring 2 of a shell type needle roller bearing 1 is formed by a pressing combined with an ironing step, and the lubricating conditions in this ironing step on the outer-diameter ironed surface, which becomes the outer-diameter surface of the outer ring 2, are in a substantially fluid lubricating state so as to restrict the circumferential surface roughness of the inner-diameter surface, the inner-diameter roundness, and the amount of uneven thickness of the tubular portion to predetermined value ranges, thereby prolonging the life of the shell type needle roller bearing and lowering the acoustic level during use.
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