Torque sensor having dual, helically-wound detection coils
US9714877B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 2016 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Apr 1, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4902
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A torque sensor for being attached around a magnetostrictive rotating shaft includes a bobbin that is provided coaxially with the rotating shaft, wherein the bobbin includes a resin, a hollow cylindrical shape, and first inclined grooves and second inclined grooves formed on an outer peripheral surface thereof, wherein the first inclined grooves are inclined at a predetermined angle relative to an axial direction, and wherein the second inclined grooves are inclined at a predetermined angle relative to the axial direction in an opposite direction of the first inclined grooves, a first detection coil including an insulated wire wound around the bobbin along the first inclined grooves, a second detection coil including the insulated wire wound around the bobbin along the second inclined grooves, and a measurement portion that detects a inductance variation of the first and second detection coils so as to measure a torque applied to the rotating shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.