Rotating shaft non-contact axial floating eliminating structure of electric spindle and electric spindle

Abstract

The invention discloses a non-contact axial floating eliminating structure for a rotating shaft of an electric spindle and the electric spindle, and belongs to the field of electric spindles. The rotating shaft is arranged in an electric spindle shell and penetrates out of the electric spindle shell; an inner ring of the angular contact ball bearing is sleeved on the rotating shaft and is fixed with the rotating shaft, an outer ring of the angular contact ball bearing is fixed on the electric spindle shell, and the angular contact ball bearing bears the radial force of the rotating shaft; the axial bearing assembly is arranged on one side of the angular contact ball bearing and comprises a first bearing component fixed to the electric spindle shell and a second bearing component fixed to the rotating shaft, the first bearing component is not in contact with the second bearing component, and at least one of the first bearing component and the second bearing component is a magnetic piece with magnetic force; the magnetic part can apply magnetic force to the other bearing part to enable the rotating shaft to be subjected to axial acting force in one direction, the acting force drives the rotating shaft to drive the inner ring of the angular contact ball bearing to tightly press balls of the angular contact ball bearing on the outer ring, and axial floating of the rotating shaft is limited.

Description

technical field [0001] The invention relates to the field of electric spindles, in particular to a non-contact axial floating elimination structure of the rotating shaft of the electric spindle and the electric spindle. Background technique [0002] The electric spindle is a kind of motor. The electric spindle is composed of a shellless motor, a rotating shaft, a bearing, a spindle unit shell, a drive module and a cooling device. Support, the stator of the motor is installed in the housing through the cooling jacket. The existing problem is that when the rotating shaft of the electric spindle is in use, due to problems such as assembly or excessive clearance, it is easy to cause the axial, radial and oblique floating of the rotating shaft, which will cause the center of the rotating shaft to shift, thus affecting the use of the electric spindle . [0003] Existing patents such as the electric spindle supported by multiple bearings with the publication number CN102570692A i...

AI Technical Summary

Problems solved by technology

[0004] However, the two angular contact ball bearings in the pair of angular contact ball bearings need to adjust the appropriate clearance, which is difficult to adjust, and the use process is relatively unstable, which cannot achieve a good effect of eliminating the axial floating of the rotating shaft

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