公开(公告)号：US11047466B1

公开(公告)日：2021-06-29

申请号：US16074363

申请日：2017-01-26

申请人： NSK LTD.

发明人： Haruhiko Kiyota ,  Takeshi Yamamoto ,  Kaname Yasuda ,  Tomohiro Arai ,  Junichi Takano ,  Kazuki Hotta

IPC分类号： F16H55/22 ,  F16H55/06 ,  F16H1/16 ,  B29C45/14 ,  F16C19/36 ,  B29C45/27 ,  B29K705/00 ,  B62D5/04 ,  B29L15/00

摘要： A first concave-convex part is formed in an outer diameter side circumferential surface of a first annular concave part provided in an axial one-side surface of an inner wheel element, and a second concave-convex part is formed in a bottom surface of a second annular concave part provided in the axial other-side surface of the inner wheel element. An outer circumferential part of the inner wheel element is embedded in an outer wheel element, and synthetic resin forming the outer wheel element partially enters into a plurality of concave parts constituting the first concave-convex part and the second concave-convex part. Thus, a configuration is achieved in which the holding power of a synthetic resin outer wheel can be secured from the metal inner wheel element, and the manufacturing error can be suppressed in the worm wheel tooth part provided in the outer circumferential surface of the outer wheel.

公开(公告)号：US11168761B2

公开(公告)日：2021-11-09

申请号：US16074354

申请日：2017-01-26

申请人： NSK LTD.

发明人： Haruhiko Kiyota ,  Takeshi Yamamoto ,  Kaname Yasuda ,  Tomohiro Arai ,  Junichi Takano ,  Kazuki Hotta

IPC分类号： F16H1/16 ,  B29C45/14 ,  B29C45/27 ,  F16C19/16 ,  F16H55/06 ,  F16H55/17 ,  B29K705/00 ,  B29L15/00 ,  B62D5/04

摘要： An inner wheel element (15a) is embedded in an outer wheel element (16a), such that a continuous range from an inner diameter side circumferential surface configuring an inner surface of a first annular concave part (22), through an outer circumferential surface of the inner wheel element (15a), to an inner diameter side circumferential surface configuring an inner surface of a second annular concave part (38) in a surface of the inner wheel element (15a) is covered over the entire circumference. Accordingly, a structure is achieved which easily secures a holding power of the synthetic resin outer wheel element with respect to the inner wheel element.

公开(公告)号：US11041544B2

公开(公告)日：2021-06-22

申请号：US16074333

申请日：2017-01-26

申请人： NSK LTD.

发明人： Haruhiko Kiyota ,  Takeshi Yamamoto ,  Kaname Yasuda ,  Tomohiro Arai ,  Junichi Takano ,  Kazuki Hotta

IPC分类号： F16H1/16 ,  F16H55/22 ,  F16H55/06

摘要： An outer wheel element (16a) formed in an annular shape with a synthetic resin and having a worm wheel tooth part (19a) on an outer circumferential surface thereof embeds a radially outer end part of an inner wheel element (15a) formed in an annular shape with a metal. An outer circumferential surface of the inner wheel element (15a), which is radially superimposed with an engaging part between the worm tooth part (19a) and a the worm wheel tooth part serves as a cylindrical surface part (24). This realizes a structure capable of suppressing manufacturing error of the worm wheel tooth part engaging with the worm tooth part.