Magnetic detenting configuration for custom encoder
US9977456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2015 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Nov 11, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05G5/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Detent systems for rotary actuators that utilize one or more sets of magnets that have either attractive or repulsive characteristics. A biasing magnetic element may be positioned to repel a floating movable magnet. The repelled movable magnetic element is forced into contact with a serrated detenting ring via the repulsive force between magnets of common pole. As the detenting ring is rotated relative to the biasing magnet, the “floating” magnetic element is forced closer to the biasing magnet. The repulsive force drives the floating magnetic element into the next recess detent causing the rotational component to snap to the next detented position. The magnetic element rolls about its longitudinal axis as the magnetic element moves from one detent location to the next, which results in rolling friction that tends to cause significantly lower surface wear and increased life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.