Jtekt Corporation

Tomohiko Haruyama

Shigeo Kamamoto

Junji Murata

Yuki Shishihara

Motoyasu Yamamori

Tsune Kobayashi

Atsushi Ando

Tohru Onozaki

Naomasa Mukaide

Hideki Shibata

Akira Saito

Katsuhito Yoshinaga

An annular cage provided with a taper roller bearing includes: a small-diameter annular portion, a large-diameter annular portion, and a plurality of column portions which link the small-diameter annular portion and the large-diameter annular portion to each other, and further includes roller retaining portions which prevent taper rollers accommodated in pockets from falling out to the outer side in the radial direction. Each of the roller retaining portions has a shape of a protruding beam that is a fixed end on the column portion side and on the small-diameter annular portion side, extends in the circumferential direction and in a column portion longitudinal direction, and is a free end on the tip end side in the extending direction.

Taper roller bearing

An easily structured swing internal contact type planetary gear device is proposed which can achieve a higher meshing ratio when an involute tooth profile is adapted. Each of an internal tooth of an internally toothed gear wheel and an external tooth of an externally toothed gear wheel is formed with an involute tooth profile. Under a driving condition, one of an internal tooth body of the internally toothed gear wheel and an external tooth body of the externally toothed gear wheel is elastically deformed in an extending direction and the other thereof is elastically deformed in a contracting direction so that the number of meshing teeth becomes larger than the number of meshing teeth under a non-driving condition.

Swing internal contact type planetary gear device and rotation drive device

Growing community of inventors

Kariya, Japan

Tomohiko Haruyama