Sealed rolling bearing

a rolling bearing and sealing technology, applied in the direction of shafts, bearings, transportation and packaging, etc., can solve the problems of increasing the torque loss of the bearing and not effectively reducing the attendant friction torque, so as to achieve high sealing performance and reduce the effect of torque loss
US20060018579A1Inactive Publication Date: 2006-01-26NTN CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
NTN CORP
Publication Date
2006-01-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

A sealed rolling bearing is proposed which makes it possible to reduce the torque loss while ensuring high sealing performance. Seal lips of seal members secured to the outer ring of the bearing at both ends thereof are in sliding contact with both ends of the outer periphery of the inner ring of the bearing. These portions of the inner ring that are in sliding contact with the seal lips are subjected to minute shot peening in which minute shots of molybdenum disulfide having a particle diameter of 20 to 200 micrometers are struck against these portions at a high speed of 50 meters per second. This decreases the friction torque attendant to sliding contact of the seal lips and makes it possible to decrease the torque loss of the bearing even if the contact pressure of the seal lips is increased sufficiently to ensure high sealing performance.
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Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a sealed rolling bearing which has its bearing space sealed by seals.

[0002] Among sealed rolling bearings which have their bearing space sealed by seals to avoid leakage of a lubricating agent such as grease filled therein, there is a type which has an outer ring, an inner ring, rolling elements disposed between the inner and outer rings, and seal members secured to one of the inner and outer rings, the seal members each having seal lips kept in sliding contact with the opposing metal face of the other of the inner and outer rings or the surface of a metallic member mounted to the other of the inner and outer rings, such as a slinger.

[0003] In order to ensure good sealing performance with this type of sealed rolling bearings, it is required that the seal lips, which are made of rubber or the like, be brought into sliding contact with the metal surface with a sufficiently high contact pressure. In order to ensure h...

Claims

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