Title:
BEARING UNIT WITH SENSOR
Document Type and Number:
Japanese Patent JP2004197765
Kind Code:
A
Abstract:
To provide a bearing unit with sensor improving resolution, whose diameter can be reduced without lowering the resolution.
A sensor device 2 has a magnetic sensor 12 disposed to face a pulser ring 3 as a member to be detected, and a magnet 21 disposed near the magnetic sensor 12 to correct magnetism input to the sensor 12. The pulser ring 3 has two magnetism generating layers 8a, 8b in which a plurality of magnetism generating parts N, S are formed in a circumferential direction at an equal pitch. The magnetism generating layers 8a, 8b having different magnetic poles are overlapped in a radial direction so that the different magnetic poles are mutually opposed.
Inventors:
SAKAMOTO KENJI
ISHII HIDEAKI
ISHII HIDEAKI
Application Number:
JP2002363610A
Publication Date:
July 15, 2004
Filing Date:
December 16, 2002
Export Citation:
Assignee:
KOYO SEIKO CO
International Classes:
G01P3/487; F16C33/58; F16C41/00; (IPC1-7): F16C41/00; F16C33/58; G01P3/487
Attorney, Agent or Firm:
Norihiko Hibi
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko