Patent ID: 7988363
Filing Date: 2011-08-02
Classification: F16C,G01D,G01P

Abstract:
1. A bearing assembly with a rotation detection device comprising: a magnetic generating element arranged on an inner race side of the bearing assembly and having a directionality about a rotation axis; and a rotation sensor fitted to an outer race side in alignment with a bearing axis to detect a magnetism, generated from the magnetic generating element, and to output information descriptive of rotation or angle, wherein the magnetic generating element is fixed to a fixing member secured to an inner diametric side of the inner race of the bearing assembly, wherein the rotation sensor includes a plurality of magnetic sensor elements and a circuit to convert respective outputs of the magnetic sensor elements into a rotation signal or an angle signal, the magnetic sensor elements and the converting circuit being integrated together, wherein the fixing member is a member separate from a shaft and is press-fitted into or bonded to an inner diametric surface of the inner race, and wherein the rotation sensor is fitted to a sensor fitting member fitted to the outer race with a collar of the sensor fitting member abutted against an end face of the outer race, and an axial position of an end face portion of the sensor fitting member that defines a position at which the rotation sensor is fitted is aligned with an axial position of the collar.