Torque measuring device
US12306059B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 28, 2023 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Dec 6, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/136
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A torque measuring device includes: a coil unit having a detection coil configured to change a voltage in response to a change in magnetic permeability of a magnetostrictive effect section of a rotating shaft; a back yoke arranged coaxially around the coil unit; a holder configured to hold the coil unit and the back yoke; and an electronic circuit including the detection coil and configured to generate an output voltage according to a voltage of the detection coil, a clearance in a radial direction is provided between an outer peripheral surface of the coil unit and an inner peripheral surface of the back yoke, and a range of change in the clearance that accompanies temperature change during use is regulated to a range in which a change in the output voltage is linear with respect to the change in the clearance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.