US 12,140,207 B2
Rotation support structure for electric cylinder
Ken Kato, Kariya (JP)
Assigned to AISIN CORPORATION, Aichi (JP)
Filed by AISIN CORPORATION, Aichi (JP)
Filed on Mar. 8, 2023, as Appl. No. 18/180,603.
Claims priority of application No. 2022-036266 (JP), filed on Mar. 9, 2022; and application No. 2022-038984 (JP), filed on Mar. 14, 2022.
Prior Publication US 2023/0287966 A1, Sep. 14, 2023
Int. Cl. F16H 25/20 (2006.01)
CPC F16H 25/20 (2013.01) [F16H 2025/2031 (2013.01); F16H 2025/2075 (2013.01); F16H 2025/2087 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A rotation support structure for an electric cylinder, comprising:
a cylindrical housing;
a motor attached to the housing and including an output shaft; and
a speed reduction mechanism built in the housing and connected to the output shaft, wherein
the speed reduction mechanism includes:
a gear unit including a first gear on one side that rotates in accordance with the output shaft, and a shaft support portion on the other side that rotates together with the first gear and has an outer member facing an inner surface of the housing and a ball mounted thereon; and
an annular second gear fixed to the inner surface of the housing and meshing with the first gear,
one side end portion of the outer member along an axis of the output shaft faces the inner surface of the housing or a spacer attached to the housing, and the other side end portion faces the second gear,
a gap is formed between the outer member and the second gear, and between the outer member and at least either the housing or the spacer, and
a gap is formed between the outer member and the inner surface of the housing.