公开(公告)号：US12110925B2

公开(公告)日：2024-10-08

申请号：US17796079

申请日：2021-01-29

申请人： NSK LTD.

发明人： Tomonori Suwa ,  Kentaro Oguma ,  Yoshinori Maeda

IPC分类号： F16C33/58 ,  F16C19/26 ,  F16C19/36 ,  F16C33/36

CPC分类号： F16C33/585 ,  F16C19/26 ,  F16C19/364 ,  F16C33/366 ,  F16C2240/50

摘要： A generatrix shape to which crowning is applied includes a first generatrix shape which is formed in a central portion in an axial direction of at least one of an outer ring raceway surface, an inner ring raceway surface, and a rolling surface of a roller and is composed of a straight line, a pair of second generatrix shapes which are formed from both ends in the axial direction toward the outside in the axial direction of the first generatrix shape and are composed of a single arc curve, and a pair of third generatrix shapes which are formed from both ends in the axial direction toward the outside in the axial direction of the second generatrix shape and are composed of a composite curve of a single arc curve and a logarithmic curve.