Series elastic actuator
AssigneeLG Electronics Inc.
InventorsHuichang PARK, Jideok Kim
Life of this patent
Estimating the term…
Abstract
A series elastic actuator includes a gear, a mounting recess formed in the gear, an elastic body provided in the mounting recess, an output body, a through-hole penetrating the gear, a shaft passing through the through-hole, a pair of bearings to radially support the shaft, and a pair of bearing mounting recesses to receive the pair of bearings. The gear is configured to rotate by a rotational power source. A rotation force of the gear is transmitted to the gear by the elastic body. The through-hole may extend in an axial direction, and the pair of bearings may be spaced apart from each other in the axial direction. The pair of bearing mounting recesses may be formed at opposite ends of the through-hole.
Claims20
An elastic actuator comprising:
- a gear configured to transmit a rotational force;
- a mounting recess formed on a first side of the gear;
- an elastic body provided in the mounting recess;
- an output body coupled to the elastic body such that the rotational force is transmitted to the output body by the elastic body;
- a through-hole formed through the gear in an axial direction of the gear;
- a shaft connected to the output body and passing through the through-hole;
- a first bearing recess and a second bearing recess formed at opposite ends of the through-hole;
- and
- a first bearing and a second bearing provided in the first bearing recess and the second bearing recess, respectively, and configured to surround the shaft in a radial direction of the gear.
An elastic actuator comprising:
- housing;
- a first gear provided in the housing and configured to transmit a rotational force;
- a second gear rotated by the first gear, the second gear having a first side and a second side opposite to the first side and a through-hole in an axial direction;
- a mounting recess formed in the first side of the second gear;
- an elastic body provided in the mounting recess;
- an output coupler, wherein the elastic body is provided between the second gear and the output coupler such that an elastic movement of the elastic body transmits a rotational force of the second gear to the output coupler;
- a shaft coupled to the output coupler and passing through the through-hole;
- a first bearing mounted at a first end of the through-hole and surrounding the shaft;
- and
- a second bearing mounted at a second end of the through-hole and surrounding the shaft.
Dependencies are inferred from the claim text.