Abstract: A gear transmission comprises an internal gear member, a carrier, an external gear and a first shaft. An internal gear is formed on an inner circumference of the internal gear member. The carrier is positioned coaxially with an axis of the internal gear and is rotatably supported on the internal gear member. The external gear meshes with the internal gear and is supported on the carrier in an eccentrically rotatable manner. The first shaft extends through the carrier along the axis of the internal gear, is rotatably supported on the carrier and transmits torque inputted at one end to the other end thereof.

Abstract: A gear transmission comprises an internal gear member, a carrier, an external gear and a first shaft. An internal gear is formed on an inner circumference of the internal gear member. The carrier is positioned coaxially with an axis of the internal gear and is rotatably supported on the internal gear member. The external gear meshes with the internal gear and is supported on the carrier in an eccentrically rotatable manner.

Abstract: An eccentric orbiting type planetary gear device includes a bearing which requires no pre-load adjustment. The planetary gear device is small in the number of components when compared with the conventional device, and is improved in performance and in assembling efficiency. In manufacturing an eccentric orbiting type planetary gear device in which a supporting block (31) is made up of a supporting member (32) having a plurality of pillar-like portions (32a), and a disk (33), the supporting member and the disk being fastened to each other with fastening members (35) with an external gear (21) between the supporting member and the disk in such a manner the external gear is engaged with an internal gear; the supporting member and the disk are abutted against each other through end faces thereof, and are fastened to each other to form the supporting block, and bearing rolling surfaces (32b) and (33a) corresponding to inner races are formed in the supporting member and the disk at a predetermined interval.

Abstract: The invention relates to an eccentric orbiting type planetary gear device which requires no pre-load adjustment for the bearing, and is small in the number of components when compared with the conventional device, and is improved in performance and in assembling efficiency, and a method of manufacturing the device.