Flux brush torque sensor
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United States of America Patent
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-
Nov 11, 2003
Grant Date -
Aug 21, 2003
app pub date -
Feb 21, 2002
filing date -
Feb 21, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A torque sensing device includes a housing, an input shaft, and a pinion shaft. A torsion bar interconnects and allows rotation of the shafts relative to one another. The shafts are supported to allow axial movement within the housing. A plurality of magnets are spaced radially about the input shaft, and a stator assembly mounted to the pinion shaft extend axially over the magnets. A pair of flux rings is supported by the housing and extend annularly around the stator assembly at a radial distance from the stator assembly. Each one of a pair of flux brushes is magnetically proximal to one of the flux rings. The flux brushes are spaced apart from one another by a gap. A pair of sensors within the gap measures the direction and magnitude of a magnetic flux passing between the flux brushes.
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