Unitized tone ring assembly
AssigneeSKF USA Inc.
InventorsDavid Dobbs, Mark F. Spreitzer, Morgan J. Bullard
Life of this patent
Estimating the term…
Abstract
A tone ring assembly for use on a rotatable machine part. The tone ring is able to generate a varying voltage output when rotated at varying speeds. A fixed position magnetic sensor detects this voltage. The tone ring comprises an axially extending main body portion having a plurality of areas able to generate a voltage upon rotation. A retainer having at least one radial flange prevents axial movement of the tone ring and the tone ring includes ribs and spaces on its inside diameter to permit oil to pass therethrough.
Claims40
A tone ring assembly for use on a rotatable machine part, said assembly including a rotatable tone ring able to generate a varying voltage output when rotated at varying speeds, with a fixed magnetic sensor assembly disposed in facing relation and closely spaced from said tone ring, said rotatable machine part including an axially inner portion and an axially outer portion running in a surrounding bearing unit, said tone ring comprising an axially extending main body portion with a plurality of areas able to generate a voltage output upon rotation, a retainer having at least one radial flange to prevent substantial axial movement of said tone ring, said tone ring including plural axially extending ribs of reduced diameter on its inner diameter for snugly engaging a shaft, and having axial spaces of enlarged diameter between said ribs, thereby affording passages for oil to pass axially through said tone ring assembly.
A tone ring assembly for use on a rotatable machine part, said assembly including a rotatable tone ring able to generate a voltage output by rotation and a magnetic sensor assembly disposed in facing relation and closely spaced from said tone ring, said rotatable machine part including an axially inner portion and an axially outer portion running in a surrounding bearing unit and with oil leakage being resisted by an oil seal, said tone ring comprising an axially extending main body portion with a plurality of lands and grooves, which generate a voltage output upon rotation, and a radially extending flange at one end of said tone ring, a retainer having axially inner and outer radial flanges to prevent substantial axial movement of said tone ring, and a spacer lying between said radially extending flange on said tone ring and said axially outer radial flange of said retainer, said tone ring including plural radially extending ribs on its inner diameter for snugly engaging a shaft, the spaces between said ribs affording passages for allowing oil to pass axially through said tone ring.
A tone ring assembly for use on a rotatable machine part, said assembly including a rotatable tone ring able to generate a voltage output by rotation and a magnetic sensor assembly disposed in facing relation and closely spaced from said tone ring, said rotatable machine part including an axially inner portion and an axially outer portion running in a surrounding bearing unit and with oil leakage being resisted by an oil seal, said tone ring comprising an axially extending main body portion with a plurality of lands and grooves able to generate a voltage output upon rotation, and a radially extending flange at one end of said tone ring, a retainer having axially inner and outer radial flanges to prevent substantial axial movement of said tone ring, said tone ring including means permitting passage of oil axially along said tone ring as well as means for engaging an axle shaft to locate said tone ring on said axle shaft, said engaging means allowing said axle shaft and said tone ring to become more strongly adherent when said tone ring is exposed to an oily condition.
Dependencies are inferred from the claim text.