发明申请
- 专利标题: Bearing for Rocker Arm
- 专利标题(中): 轴承摇臂
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申请号: US11659237申请日: 2005-05-12
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公开(公告)号: US20070289566A1公开(公告)日: 2007-12-20
- 发明人: Rino Fukami
- 申请人: Rino Fukami
- 优先权: JP2004-228038 20040804
- 国际申请: PCT/JP05/08671 WO 20050512
- 主分类号: F01L1/18
- IPC分类号: F01L1/18
摘要:
A bearing for a rocker arm includes a shaft corresponding to an inner race fixed to a rocker arm interposed between an engine valve and a cam to adjust intake and exhaust, an outer race 4 in contact with the cam, located outer to the inner race, and a plurality of needle rollers located between the outer race and the inner race. The outer race includes a nitrogen-enriched layer. The grain size number of austenite crystal grains in the nitrogen-enriched layer is in a range exceeding No. 10. The outer race outside cylindrical surface has random small concave pits.