Combined sensor and bearing assembly and method of magnetizing element of rotation sensor
First Claim
1. A combined sensor and bearing assembly, which comprises:
- a rolling bearing unit including a rotatable raceway member, a stationary raceway member mounted around the rotatable raceway member with an annular bearing space defined between it and the rotatable raceway member, and a circular row of rolling elements operatively accommodated within the annular bearing space;
a to-be-detected member including a magnet secured to the rotatable raceway member; and
a magnetic detector including a magnetic sensor of an analog output type disposed in face-to-face relation with the to-be-detected member;
wherein only a range in which a magnetic characteristic of the to-be-detected member relative to the magnetic detector exhibits output linearity is used for detection of rotation angle of the rotatable raceway member.
1 Assignment
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Accused Products
Abstract
A combined sensor and bearing assembly (1) of the present invention includes a rolling bearing unit (22) and a rotation sensor unit (23). The rolling bearing unit (22) includes a rotatable raceway member (2), a stationary raceway member (3) mounted around the rotatable raceway member (2) with an annular bearing space defined between it and the rotatable raceway member (2), and a circular row of rolling elements (4). The combined sensor and bearing assembly (1) also includes a to-be-detected member (7) including a magnet secured to the rotatable raceway member (2), and a magnetic detector (8) including a magnetic sensor of an analog output type disposed in face-to-face relation with the to-be-detected member (7). Only a range in which a magnetic characteristic of the to-be-detected member (7) relative to the magnetic detector (8) exhibits linearity is used for detection of rotation angle of the rotatable raceway member (2).
11 Citations
10 Claims
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1. A combined sensor and bearing assembly, which comprises:
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a rolling bearing unit including a rotatable raceway member, a stationary raceway member mounted around the rotatable raceway member with an annular bearing space defined between it and the rotatable raceway member, and a circular row of rolling elements operatively accommodated within the annular bearing space; a to-be-detected member including a magnet secured to the rotatable raceway member; and a magnetic detector including a magnetic sensor of an analog output type disposed in face-to-face relation with the to-be-detected member; wherein only a range in which a magnetic characteristic of the to-be-detected member relative to the magnetic detector exhibits output linearity is used for detection of rotation angle of the rotatable raceway member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of magnetizing a to-be-detected member comprised of a magnet, which member forms a part of a rolling bearing assembly comprising a rotatable raceway member, a stationary raceway member mounted around the rotatable raceway member with an annular bearing space defined between it and the rotatable raceway member, and a circular row of rolling elements operatively accommodated within the annular bearing space, said member being mounted on the rotatable raceway member, which method comprising:
magnetizing the to-be-detected member so that a magnetic characteristic of the to-be-detected member relative to a magnetic sensor of an analog output type for detecting a magnetic field emanating from the to-be-detected member can have a range in which output linearity is exhibited.
Specification