LOAD-MEASURING DEVICE FOR ROLLING BEARING UNIT AND ROLLING BEARING UNIT FOR LOAD MEASUREMENT

Title:

LOAD-MEASURING DEVICE FOR ROLLING BEARING UNIT AND ROLLING BEARING UNIT FOR LOAD MEASUREMENT

Document Type and Number:

WIPO Patent Application WO/2004/072598

Kind Code:

A1

Abstract:

The revolving speed of balls (8, 8) constituting the outer row is detected by a revolving speed-detecting sensor (24). Further, the rotating speed of a hub (1a) is detected by a rotating speed-detecting sensor (25). A speed ratio that is the ratio between the revolving speed and the rotating speed is obtained based on the detected signals from both sensors (24, 25). When an axial load varies and the contact angle of the balls (8, 8) varies, the revolving speed of the individual balls (8, 8) varies, and in turn the speed ratio varies. Then, the axial load is calculated based on the variation of the speed ratio. In this way, a load-measuring device for a rolling bearing unit can be structured at low costs, and a structure with which an axial load acting between the hub (1a) and an outer ring (4a) can be obtained is realized.

Inventors:

YANAGISAWA TOMOYUKI (JP)
MATSUOKA KATSUTOSHI (JP)
SAKATANI IKUNORI (JP)
KUMAGAI SHIN (JP)

Application Number:

PCT/JP2004/001104

Publication Date:

August 26, 2004

Filing Date:

February 04, 2004

Export Citation:

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Assignee:

NSK LTD (JP)
YANAGISAWA TOMOYUKI (JP)
MATSUOKA KATSUTOSHI (JP)
SAKATANI IKUNORI (JP)
KUMAGAI SHIN (JP)

International Classes:

F16C19/18; F16C19/52; G01P3/487; F16C33/58; F16C41/00; G01L5/00; G01M13/04; G01P15/00; (IPC1-7): G01L5/00

Foreign References:

JPS5594541U	1980-06-30
JP2002323056A	2002-11-08
JPS62218832A	1987-09-26
JP2913913B2	1999-06-28
JPS5594541U	1980-06-30
US20020092360A1	2002-07-18

Other References: