Title:
ENCODER FOR DETECTING ROTATION STATE, ROTATION STATE DETECTION DEVICE, AND ROLLING BEARING UNIT WITH ROTATION STATE DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2001242189
Kind Code:
A
Abstract:
To detect stable rotation state by preventing the distance between a surface 15b to be detected by an encoder 14b and the tip surface of a pole piece 23 of a sensor 20, regardless of the displacement of a rotary member of a hub 1 or the like.
The surface 15b to be detected is set to a spherical sculptured surface with a point O1, that becomes the displacement center of the hub 1 or the like as its center. With this constitution, change in the distance is prevented, and solves this problem.
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Inventors:
ISHIKAWA SHUICHI
Application Number:
JP2000051062A
Publication Date:
September 07, 2001
Filing Date:
February 28, 2000
Export Citation:
Assignee:
NSK LTD
International Classes:
G01P3/488; B60B35/02; F16C19/52; G01B7/00; G01B7/30; G01D5/245; (IPC1-7): G01P3/488; B60B35/02; F16C19/52; G01B7/30; G01D5/245
Attorney, Agent or Firm:
Takeo Koyama (1 person outside)
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