Rolling bearing inner ring and rolling bearing sealing structure

Abstract

The invention discloses a rolling bearing sealing structure, belonging to the bearing structure. The traditional sealing structure for sealing the rolling bearing is complex, and difficult to ensure a sealing lip to contact a sealed part reliably to form a reliable sealing. According to the invention, at least one side of a inner ring rolling way of an inner ring is provided with a first sealing surface on the outside and a second sealing surface on the inside, and an inclined angle Alpha between the first and second sealing surfaces is more than 100 degree and less than 180 degrees; an inclined angle Beta between the first sealing surface and an axial line of the inner ring is not less than 0 degree and not more than 45 degrees; an inclined angle Theta between the second sealing surface and the axial line of the inner ring is not less than 10 degrees and not more than 80 degrees; the inner edge of a sealing piece is provided with a first sealing lip edge in contact with the first sealing surface and a second sealing lip edge in contact with the second sealing surface; and therefore, a sealing groove structure can be simplified; the sealing surface can be ground by a formed grinding wheel at one time when the rolling way is ground; the precision requirement and the surface finish of the sealing surface are ensured, and the sealing lip can reliably contact the sealing surface to realize the precise sealing.

Description

technical field [0001] The invention belongs to a bearing structure, in particular to an inner ring of a rolling bearing and a sealing structure of a rolling bearing for ensuring the sealing effect of the bearing. Background technique [0002] A sealed rolling bearing is usually composed of an inner ring, an outer ring, a rolling body held on the inner ring raceway and the outer ring raceway by a cage, and a seal installed between the inner ring and the outer ring on the outer side of the rolling body. The sealing lip on the edge of the seal is installed in the sealing groove of the inner ring and outer ring to realize the sealing of the inner cavity of the bearing, so the dimensional accuracy, shape accuracy, position accuracy and surface finish of the inner ring and outer ring sealing groove directly affect the sealing lip Sealing effect with inner ring and outer ring. [0003] After heat treatment, the inner and outer rings of rolling bearings will be deformed in the axi...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved and the technical task proposed by the present invention are to overcome the defects that the sealing structure of the existing sealed rolling bearing is complicated, and it is difficult to ensure that the sealing lip can reliably contact the sealing part to form a reliable seal in actual use, and provide a rolling bearing inner ring and a rolling bearing sealing structure

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