Kabushiki Kaisha Riken

Tomoki Shirasawa

Satoru Fujita

Ryo Kamiyama

Kazuo Ishizuka

It is included an internal gear (2), an external gear (3) having flexibility, and a wave generator (4) that forms a meshing part (P) with the internal gear (2) in the external gear (3) and moves the meshing part (P) in a circumferential direction of the internal gear (2). The wave generator (4) is configured such that the meshing part (P) is formed at three or more positions in a circumferential direction of the external gear (3). A value (Dp/Z) obtained by dividing a working pitch diameter Dpof the external gear (3) by the number of teeth Zis greater than a value (Dp/Z) obtained by dividing a working pitch diameter Dpof the internal gear (2) by the number of teeth Z.

Growing community of inventors

Tokyo, Japan

Tomoki Shirasawa