Measuring and testing – Dynamometers – Responsive to torque
Patent
1994-02-24
1994-10-11
Chilcot, Jr., Richard E.
Measuring and testing
Dynamometers
Responsive to torque
73862333, G01L 100
Patent
active
053536495
ABSTRACT:
A non-contact detecting type torque sensor having an enlarged measurable torque range is disclosed, in which a tubular torque transmission member having a mounting portion formed on its inner peripheral surface is fixedly mounted on a shaft, a tubular joining member fitted over the torque transmission member is welded at its opposite ends, a surface magnetic layer having a magnetostrictive properties is formed on an outer peripheral surface of the joining member, and coils are disposed around the surface magnetic layer. With this construction, the magnetic permeability of the surface magnetic layer varies with a torque transmitted from the shaft. A change in magnetic permeability is detected in terms of a change in self-inductance of the coils. The welded ends of the joining member are disposed outside the mounting portion of the torque transmitting member in a longitudinal direction of the shaft, so that the measurable torque range of the torque sensor can be enlarged.
REFERENCES:
patent: 4711134 (1987-12-01), Kita
patent: 4780671 (1988-10-01), Hase et al.
patent: 4817444 (1989-04-01), Yagi et al.
patent: 4885944 (1989-12-01), Yagi et al.
patent: 4899597 (1990-02-01), Yagi et al.
patent: 4962672 (1990-10-01), Yagi et al.
Hase Hiroyuki
Shoji Rihito
Wakamiya Masayuki
Biegel R.
Chilcot Jr. Richard E.
Matsushita Electric - Industrial Co., Ltd.
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