Bearing structure of motor

Abstract

The invention relates to a bearing structure of a motor, which comprises shaft circlips, a bearing outer cover, a front bearing, a bearing inner cover and a rear bearing, wherein the shaft circlips are arranged on an end cover; the front bearing is arranged on the shaft extending end; and the rear bearing is arranged on the non-shaft extending end. The outer rings of the front bearing and the rear bearing are clamped through the bearing outer cover and the bearing inner cover, and the inner rings thereof are respectively clamped by the circlips. The bearing structure is characterized in that the front bearing adopts a ball bearing, and the rear bearing adopts a roller bearing. The invention has the advantages that the structure is simple, compact and reasonable, the shaft extending end adopts the ball bearing, therefore the noise is small; the non-shaft extending end adopts the roller bearing, although the noise and heat generation amount of the roller bearing are large, the non-shaft extending end is provided with a fan, the noise can be covered by the fan, the generated heat can be quickly taken away by the fan, and the cooling condition is good; the roller bearing can overcome the defect of bearing damage as the rotary shaft is subject to heat extension and axially plays in the bearing chamber, thereby greatly prolonging the service life of the motor bearing.

Description

technical field [0001] The invention relates to an accessory part of a motor, in particular to a bearing structure of the motor. Background technique [0002] "Bearing structure" is a general term for the overall structure formed by the combination of bearings and matching parts (such as end covers, bearing inner and outer covers, etc.) in the domestic motor industry. The bearing is used as the connecting device between the stationary part and the rotating part of the asynchronous motor, and its quality and reliability determine the quality and life of the motor. In actual use, the faults of the bearing parts account for more than 1 / 2 of all motor faults, which shows the importance of the bearing structure. At present, domestically produced small and medium-sized motors with two poles generally use two ball bearings, and the fit between the bearing housing and the bearing chamber is mostly a transition fit. In addition, the bearings will heat up and expand when the motor is...

AI Technical Summary

Problems solved by technology

At present, domestically produced small and medium-sized motors with two poles generally use two ball bearings, and the fit between the bearing housing and the bearing chamber is mostly a transition fit. In addition, the bearings will heat up and expand when the motor is running. Axial "play" in the bearing chamber, causing bearing damage

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