Patent ID: 8936525
Filing Date: 2015-01-20
Classification: B60K,F16H,Y10T

Abstract:
1. An eccentrically oscillating gear system comprising: an internal gear; an external gear disposed inward of the internal gear to mesh with the internal gear, and including teeth that are different in number from teeth of the internal gear; an input shaft rotatably inserted into a center hole formed in the external gear; and an anti-rotation section engaging with the external gear to block rotation of the external gear, wherein the input shaft has an eccentric part that is eccentric relative to a center line of the input shaft, in a situation where the anti-rotation section blocks the rotation of the external gear, the external gear is eccentrically oscillated while meshing with the internal gear by rotating the input shaft with the eccentric part being inserted into the center hole of the external gear, the anti-rotation section is formed such that the input shaft is inserted into the anti-rotation section, and is rotatable about the center line of the input shaft, the gear system includes: one of a first mode in which while the brake is operated, and the clutch system is placed in the non-coupling state, the external gear is oscillated, or a second mode in which while the brake is released, and the clutch system is placed in the coupling state, the external gear is rotated at a rotational speed equal to a rotational speed of the input shaft is selected.