Patent ID: 11932323
Assignee: NABTESCO CORPORATION
Field: nan (nan)
Classification: CPC nan | IPC B

Claim 0:
1. A speed reducer comprising:
a crank gear meshing with an output gear of a drive device;
an input rotating body attached to the crank gear, the input rotating body being rotatable when acted upon by power fed from the drive device, the input rotating body including a pair of journals, a first eccentric rotating portion, and a second eccentric rotating portion, the pair of the journals being concentrically disposed on the crank gear, the first eccentric rotating portion and the second eccentric rotating portion being provided between the pair of the journals;
a speed reducing mechanism unit for reducing a speed of rotation of the input rotating body, the speed reducing mechanism unit including a first eccentric portion bearing, a second eccentric portion bearing, a first oscillating gear, and a second oscillating gear, the first oscillating gear being supported on the first eccentric rotating portion via the first eccentric portion bearing, the second oscillating gear being supported on the second eccentric rotating portion via the second eccentric portion bearing;
a tubular case covering an outer surface of the speed reducing mechanism unit and configured to rotate when acted upon by speed-reduced power from the speed reducing mechanism unit; and
a base block including a fixture flange, the fixture flange being fixed to a case of the drive device, the base block rotatably supporting the input rotating body and the tubular case,
wherein an output arm is formed integrally with the tubular case, the output arm extending radially outward from an outer peripheral surface of the tubular case and configured to transmit a manipulating force to an outside.