Magnetic encoder and rolling bearing
AssigneeNtn Corporation
InventorsTatsuo Nakajima, Arito Matsui
Life of this patent
Estimating the term…
Abstract
The magnetic encoder (17) includes a slinger (18) fixed to a rotation-side raceway ring of a bearing and including an outer side surface (22) opposed to the side of a sensor to detect rotation speed of the rotation-side raceway ring and having a surface roughness Ra: 0.3 to 3.0 μm, and an inner side surface (23) opposed to the side of a sealing member (16) to seal the bearing; a multipolar magnet (19) bonded to the outer side surface (22) through an adhesive; and a film (25b) formed on the inner side surface (23), having a surface roughness Ra of 0.3 μm or less, and being in sliding contact with the sealing member (16).
Claims6
A magnetic encoder comprising:
- a slinger fixed to a rotation-side raceway ring of a bearing and including an outer side surface opposed to the side of a sensor to detect rotation speed of said rotation-side raceway ring and having surface roughness Ra:
- 0.3 to 3.0 μm, and an inner side surface opposed to a sealing member to seal said bearing;
- a magnet bonded to said outer side surface through an adhesive;
- and
- a film formed on said inner side surface, having surface roughness Ra:
- 0.3 μm or less, and being in sliding contact with said sealing member.
A rolling bearing comprising;
- a rotation-side raceway ring;
- a static-side raceway ring;
- a rolling body arranged between said rotation-side raceway ring and said static-side raceway ring, and rolling on a track surface of said rotation-side raceway ring and a track surface of said static-side raceway ring;
- a magnetic encoder fixed to said rotation-side raceway ring;
- and
- a sealing member fixed to said static-side raceway ring, wherein
- said magnetic encoder comprises a slinger fixed to said rotation-side raceway ring and including an outer side surface opposed to the side of a sensor to detect rotation speed of said rotation-side raceway ring and having surface roughness Ra:
- 0.3 to 3.0 μm, and an inner side surface opposed to the side of said sealing member to seal the rolling bearing;
- a magnet bonded to said outer side surface through an adhesive;
- and
- a film formed on said inner side surface, having surface roughness Ra:
- 0.3 μm or less, and being in sliding contact with said sealing member.
Dependencies are inferred from the claim text.