Bearings with contact seals

Abstract

The present invention relates to the field of bearing sealing, and more particularly to a bearing with a contact sealing structure. The bearing includes: a first bearing ring and a second bearing ring that can rotate relatively, the first bearing ring is formed with a groove opening toward the second bearing ring, and the groove includes first side walls opposite to each other in the axial direction of the bearing and a second side wall; and a sealing structure, the sealing structure is mounted on the second bearing ring, the sealing structure includes a skeleton and a sealing portion attached to the skeleton, the sealing portion includes respectively extending toward the first side wall and the second side wall of the groove. A first contact lip and a second contact lip so that the bearing is in contact with the first side wall and / or the second contact lip with the second side wall whether or not the bearing is subjected to axial forces touch. The bearing of the present invention can ensure that at least one lip part and the side wall can achieve contact sealing regardless of whether the bearing is in a natural state or a stressed state, thereby ensuring the sealing effect of the sealing structure.

Description

technical field [0001] The present invention relates to the field of bearing sealing, and more particularly to a bearing with a contact sealing structure. Background technique [0002] In the related art, contact sealing means are widely used in various bearings for preventing contaminants outside the bearing from intruding into the inside of the bearing and preventing oil or grease inside the bearing from leaking out. [0003] Taking deep groove ball bearings as an example, Figure 1a and Figure 1b A schematic partial cross-sectional view of a prior art deep groove ball bearing along the axial direction is shown. As shown in the figure, the deep groove ball bearing includes an inner ring 10 and an outer ring 20 that can rotate relative to each other, a raceway for the steel balls 30 to roll is formed between the inner ring 10 and the outer ring 20, and a plurality of steel balls 30 along the Circumferentially uniformly arranged in the raceway and held by a cage (not show...

AI Technical Summary

Problems solved by technology

However, once the outer ring 20 of the deep groove ball bearing is subjected to such Figure 1b As shown by the action of the axial force F from one side of the axial direction A, the sealing structure 40 will shift toward the other side of the axial direction A relative to the inner ring 10 along with the outer ring 20

This will cause the contact lip 4021 of the sealing structure 40 on the other side in the axial direction A to lose contact with the shoulder 101 of the inner ring 10, resulting in a significant deterioration of the sealing effect

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