Sealing structure for bearings

Abstract

The invention discloses a sealing structure for a bearing, which comprises a first skeleton fixed to the outer ring of the bearing, a second skeleton fixed to the inner ring of the bearing, and an elastic seal, the first skeleton includes a first skeleton extending toward the inner ring of the bearing The radially extending portion, the second frame includes a second radially extending portion extending toward the outer ring of the bearing, the second radially extending portion is located axially outside the first radially extending portion, and the sealing structure forms at least the first cavity in the radial direction chamber and a second chamber, the first chamber is formed solely by the first radially extending portion or the second radially extending portion, the second chamber is located radially inside the first chamber, elastically sealed The member includes a first seal extending into the first chamber and a second seal extending into the second chamber. The present invention designs multi-stage seals in the radial direction of the bearing, thereby reducing the axial size of the seal structure and ensuring good sealing effect under the condition of convenient bearing installation.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a sealing structure of a bearing. Background technique [0002] like figure 1 and figure 2 As shown, an existing bearing includes an outer ring 1, an inner ring 2, a number of rolling elements 3 accommodated between the inner ring and the outer ring, and a sealing structure 4 that acts as a seal on both sides of the bearing in the axial direction. The sealing structure 4 includes a receiving part 41 fixed on the outer surface of the inner ring 2 , a support part 42 fixed on the inner surface of the outer ring 2 and a sealing part 43 connected to the support part 42 . The receiving part 41 includes a first axial extension 411 axially fixed on the outer surface of the inner ring 2 , a second axial extension 411 located radially outside the first axial extension 411 and spaced apart from the first axial extension 411 . Two axially extending portions 412 and a radially extending...

AI Technical Summary

Problems solved by technology

[0003] On the one hand, the axial dimension of the existing sealing structure 4 is too large, correspondingly, the axial dimension of the inner ring 2 also needs to be increased, which will bring inconvenience to the bearing installation in applications where the installation space is relatively narrow; on the other hand On the one hand, during use, external sewage, oil or impurity particles easily enter the accommodation chamber 44 through the gap between the third sealing lip 433 and the second axial extension 412, and are not easily thrown out during the operation of the bearing; at the same time , the lubricating oil inside the bearing also easily enters the housing chamber 44, which easily leads to early failure of the seal 43

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