Electric motor actuation of a hydrostatic pump
US8074451B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2008 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Jul 12, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H39/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic motor system for improved frequency response includes a hydraulic variator having a pump and a motor, wherein the pump includes a variable angle swash plate, and the system further includes an electric actuator for controlling an angle or torque of the swash plate, thereby controlling the motor output characteristics. The electric actuator for controlling the variable angle swash plate may comprise a linear electric motor, ball screw drive or a rotary electric motor. In an example, the rotary electric motor tilts the swash plate by applying a torque to the swash plate at a point away from its tilt axis. In a further example, the rotary electric motor tilts the swash plate via a worm drive or ball screw drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.