US 12,247,645 B2
Planetary gear device and actuator
Takuya Kaneko, Saitama (JP)
Assigned to Enplas Corporation, Saitama (JP)
Appl. No. 18/274,221
Filed by Enplas Corporation, Saitama (JP)
PCT Filed Jan. 29, 2021, PCT No. PCT/JP2021/003261
§ 371(c)(1), (2) Date Jul. 26, 2023,
PCT Pub. No. WO2022/162872, PCT Pub. Date Aug. 4, 2022.
Prior Publication US 2024/0125375 A1, Apr. 18, 2024
Int. Cl. F16H 1/46 (2006.01); F16H 19/08 (2006.01); F16H 57/08 (2006.01)
CPC F16H 19/08 (2013.01) [F16H 1/46 (2013.01); F16H 57/08 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A planetary gear apparatus, comprising:
a plurality of planetary gears each of which includes a planetary teeth portion on an outer circumferential surface; and
an internal gear including a cylindrical portion that is provided in such a way as to surround the plurality of planetary gears and includes an internal teeth portion on an inner circumferential surface, the internal teeth portion being in mesh with the planetary teeth portion, wherein
the internal gear further includes a sliding contact portion formed integrally with the cylindrical portion and having an annular shape extending radially inward from one end portion of the cylindrical portion in an axial direction, the sliding contact portion being configured to be in sliding contact with one of end surfaces of the planetary gear in the axial direction when the planetary gear apparatus is in a state of use.