US 11,852,220 B2
Gear mechanism, speed reducer and drive device using speed reducer
Koji Nakamura, Tokyo (JP); Yuta Nagaya, Tokyo (JP); Mitsuru Shimamoto, Tokyo (JP); and Takayuki Okimura, Tokyo (JP)
Assigned to Nabtesco Corporation, Tokyo (JP)
Appl. No. 17/442,085
Filed by Nabtesco Corporation, Tokyo (JP)
PCT Filed Mar. 25, 2020, PCT No. PCT/JP2020/013285
§ 371(c)(1), (2) Date Sep. 22, 2021,
PCT Pub. No. WO2020/217831, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-086552 (JP), filed on Apr. 26, 2019; and application No. 2019-127992 (JP), filed on Jul. 9, 2019.
Prior Publication US 2022/0163096 A1, May 26, 2022
Int. Cl. F16H 3/00 (2006.01); F16H 57/022 (2012.01)
CPC F16H 3/001 (2013.01) [F16H 57/022 (2013.01); F16H 2057/0222 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A speed reducer comprising:
a supporting block;
an input gear rotatably supported on the supporting block;
an intermediate gear meshing with the input gear;
an output gear meshing with the intermediate gear;
a supporting shaft configured to rotatably support the intermediate gear; and
a gear position changing mechanism configured to change a position of the intermediate gear relative to the input and output gears,
wherein the gear position changing mechanism includes:
a retaining member detachably attached to the supporting block; and
a retaining portion on the retaining member and connected to the supporting shaft, and an outer diameter of the retaining member is larger than an outer diameter of the supporting shaft.