US 7,071,834 B2 · Device for monitoring the operating conditions of rolling bearing

Abstract

A device for monitoring the operating conditions of a rolling bearing, has the rolling bearing including: an outer ring of a metal with outer raceway; an inner ring of a metal with an inner raceway; and a plurality of rolling elements; a first member electrically connected to the outer ring; a second member electrically connected to the inner ring; and a lubricant presented on the area at which the outer raceway and the inner raceway come in contact with the rolling surface of the rolling elements; wherein, the electrical characteristics between the outer ring or first member and the inner ring or second member are monitored in order to monitor the operating conditions of the rolling bearing operating with a lubricant and when the electrical characteristics thus monitored fall outside a predetermined range, the lubricating conditions are judged poor.

Claims13

Dependent claims

A device for monitoring the operating conditions of a rolling bearing, comprising:

the rolling bearing including:
an outer ring made of a metal having an outer raceway provided on the inner surface thereof;
an inner ring made of a metal having an inner raceway provided on the outer surface thereof;
and a plurality of rolling elements rollably interposed between the outer raceway and the inner raceway;
a first member electrically connected to the outer ring;
a second member electrically connected to the inner ring;
and
a lubricant presented on the area at which the outer raceway and the inner raceway come in contact with the rolling surface of the rolling elements;
wherein the electrical characteristics between the outer ring or first member and the inner ring or second member are monitored in order to monitor the operating conditions of the rolling bearing operating with the lubricant and when the electrical characteristics thus monitored fall outside a predetermined range, the lubricating conditions are judged poor.

6 more elements

A device for monitoring the operating conditions of a rolling bearing which holds a metallic main spindle rollably inside a metallic housing, comprising:

the rolling bearing including:
an outer ring made of a metal having an outer raceway provided on the inner surface thereof;
an inner ring made of a metal having an inner raceway provided on the outer surface thereof;
and a plurality of rolling elements rollably interposed between the outer raceway and the inner raceway, the outer ring being mounted on the housing and the inner ring being mounted on the main spindle;
and
a lubricant presented on the area at which the outer raceway and the inner raceway come in contact with the rolling surface of the rolling elements;
wherein the electrical characteristics between the outer ring and the inner ring are monitored in order to monitor the operating conditions of the rolling bearing operating with the lubricant and when the electrical characteristics thus monitored fall outside a predetermined range, the lubricating conditions are judged poor.

4 more elements

Dependencies are inferred from the claim text.

Device for monitoring the operating conditions of rolling bearing

Life of this patent

Device for monitoring the operating conditions of rolling bearing

Life of this patent

Abstract

Claims13