Rolling bearing

Abstract

The invention provides a rolling bearing which comprises an outer ring, an inner ring, a rolling body and a retainer, wherein the rolling body is positioned between the raceway of the inner ring and the raceway of the outer ring, and the rolling body is uniformly separated by the retainer in the raceways along the circumferential direction. The rolling bearing is characterized in that a sealing device is arranged in a sealing groove of a bearing ring, and the sealing device is arranged outside the retainer. The sealing device is made from polyfluortetraethylene, and the minimum clearance formed between the sealing device and the inner ring as well as the outer ring is 0.001 millimeter. In the invention, the polyfluortetraethylene material is used for making a sealing element for replacing a metal stamping type dustproof cover and a rubber sealing ring, thereby avoiding the influence on the circularity, ellipticity and verticality of the outer ring of the rolling bearing (especially a thin-wall bearing) when the stamping type dustproof cover is assembled on the bearing, improving the sealing effect and dustproof effect, and simultaneously improving the compatibility of the sealing element and a lubricating agent.

Description

technical field [0001] The invention relates to a bearing, in particular to the technical field of sealing of rolling bearings. Background technique [0002] Rolling bearings are generally sealed with metal stamping dust covers and rubber seals. Rolling bearings sealed with metal stamping dust caps, on the one hand, when the rolling bearings are assembled with stamping dust caps, it is easy to cause the roundness, ellipticity and verticality of the outer ring of the rolling bearing to be out of tolerance, and then cause the bearing to be degraded or scrapped, especially for thin-walled bearings The impact is greater; on the other hand, in order to avoid the contact between the metal dust cover and the sealing groove when the bearing is running, the sealing gap is selected to be large, resulting in poor sealing and dustproof effect. Rolling bearings that use rubber materials as seals have poor compatibility with the lubricant inside the bearing. Contents of the invention ...

AI Technical Summary

Problems solved by technology

Rolling bearings sealed with metal stamping dust caps, on the one hand, when the rolling bearings are assembled with stamping dust caps, it is easy to cause the roundness, ellipticity and verticality of the outer ring of the rolling bearing to be out of tolerance, and then cause the bearing to be degraded or scrapped, especially for thin-walled bearings The impact is greater; on the other hand, in order to avoid the contact between the metal dust cover and the sealing groove when the bearing is running, the sealing gap is selected to be large, resulting in poor sealing and dustproof effect

Rolling bearings that use rubber materials as seals, rubber seals are poorly compatible with lubricants inside the bearing

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