Nsk Corporation

Tomohiro Arai

Takeshi Yamamoto

Haruhiko Kiyota

Kaname Yasuda

Junichi Takano

Kazuki Hotta

An inner wheel element () is embedded in an outer wheel element (), such that a continuous range from an inner diameter side circumferential surface configuring an inner surface of a first annular concave part (), through an outer circumferential surface of the inner wheel element (), to an inner diameter side circumferential surface configuring an inner surface of a second annular concave part () in a surface of the inner wheel element () 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.

Worm wheel, worm reduction gear, and method for producing worm wheel

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.

Worm wheel, worm decelerator, and method for producing worm wheel

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

Growing community of inventors

Maebashi, Japan

Tomohiro Arai