Title:
SPEED REDUCER
Document Type and Number:
WIPO Patent Application WO/2022/249699
Kind Code:
A1
Abstract:
A speed reducer comprising: an annular external gear which has a plurality of external teeth and in which a first through hole and a plurality of second through holes arranged side by side in the circumferential direction so as to surround the first through hole are formed; an input shaft extending through the first through hole; a first bearing holding the input shaft so that the input shaft is relatively rotatable with respect to the external gear in the circumferential direction; a plurality of inner periphery pins extending through the second through holes in the axial direction; an inner periphery pin holder holding both ends of the plurality of inner periphery pins and surrounding the outer peripheral surface of the input shaft; a second bearing surrounding the outer peripheral surface of the external gear; and internal gear pins meshing with the external teeth. The second bearing includes: an outer ring fixed to the inner periphery pin holder; an inner ring disposed on the radially inner side relative to the outer ring and forming an output shaft that rotates at a lower speed than the input shaft; and rolling elements contacting the inner peripheral surface of the outer ring and the outer peripheral surface of the inner ring. In the inner ring, a pin holding portion having an annular shape surrounding the outer peripheral surface of the external gear and holding the internal gear pins is formed along the inner peripheral surface.
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Inventors:
SASAKI SATOSHI (JP)
Application Number:
PCT/JP2022/013923
Publication Date:
December 01, 2022
Filing Date:
March 24, 2022
Export Citation:
Assignee:
NIPPON THOMPSON CO LTD (JP)
International Classes:
F16H1/32
Foreign References:
| JP2003021198A | 2003-01-24 | |||
| JP2020133904A | 2020-08-31 | |||
| JP2017110776A | 2017-06-22 | |||
| JPH083733Y2 | 1996-01-31 | |||
| JP2006226370A | 2006-08-31 | |||
| JP2017067276A | 2017-04-06 |
Attorney, Agent or Firm:
KITANO Shuhei et al. (JP)
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