Ball-ramp-actuated friction clutch controlled by a particle-clutch
US6412618B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Jun 30, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2037/005
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A particle clutch and a ball-ramp-actuated friction clutch controlled by the particle clutch. The particle clutch includes input and output couplings, the transfer of force therebetween being determined by the shear viscosity of a magnetically reactive medium, comprising magnetic particles or a magnetorheological fluid, which fills a gap between corresponding surfaces operably connected to the input and output couplings. The shear viscosity of the medium is variable by the application of a magnetic field. The output coupling is operably connected to one side of the ball-ramp actuator, such that a transfer of force between the input and output couplings causes a relative rotation in the actuator, initiating a camming action that compresses friction plates within the friction clutch for transfer of torque through the friction clutch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.