Electro-hydrostatic actuator excellent in snubbing characteristic, and drive device used for the same, and control method used for the same
US8701400B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 10, 2010 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jan 12, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C13/504
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention is to provide an electro hydrostatic actuator excellent in a snubbing characteristic including a cylinder type actuator main body 1, a piston 2 having a piston rod, the piston slidingly moving in a cylinder of the actuator main body, a motor 18, a pump 19 for supplying fluid according to the rotation of the motor, a mechanism for adjusting a running amount of the fluid into and from the cylinder according to the motion of the piston, and a reservoir 8 for adjusting the supply of the fluid corresponding to a volume difference generated according to the motion of the piston, and a controller 17 which controls the number of revolutions of the motor according to the calculated load torque, and a snubbing control method used for this. An electro hydrostatic actuator of realizing a snubbing mechanism capable of increasing energy efficiency, when used for a landing gear retraction/extension device of an airplane, can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.