Anti-corrosion structure of motor bearing and plastic-encapsulated brushless DC motor

Abstract

The invention is applicable to the field of motors, and discloses an anti-corrosion structure of motor bearings and a plastic-encapsulated brushless DC motor, wherein the anti-corrosion structure of motor bearings includes a rotating shaft, a first bearing installed at one end of the rotating shaft, and a sleeve sleeved outside the first bearing. The first bearing bracket, the conductive casing electrically connected to the first bearing bracket, and the elastic conductive component conductively connected between the conductive casing and the rotating shaft, the conductive casing is sleeved outside the first bearing bracket, and the rotating shaft has a The first bearing bracket passes through and extends into the extension part of the conductive casing. The elastic conductive component is mounted on the extension part and elastically connected between the conductive casing and the extension part. In the present invention, through the arrangement of the conductive casing and the elastic conductive component, the conductive connection between the first bearing inner ring support and the outer ring support is realized, the potential difference between the first bearing inner ring support and the outer ring support is eliminated, and the Electric corrosion occurs in the first bearing, and the manufacturing cost of the first bearing is low, and the impact resistance is good, and the load capacity is good.

Description

technical field [0001] The invention belongs to the field of electric motors, and in particular relates to an electric-corrosion-proof structure for motor bearings and a plastic-encapsulated brushless DC motor with the electric-corrosion-proof structure for motor bearings. Background technique [0002] In the traditional plastic-encapsulated brushless DC motor, due to the potential difference between the inner ring support and the outer ring support of the bearing, it is easy to cause electric corrosion to the bearing, which seriously affects the service life of the bearing. [0003] In order to prevent the electric corrosion of the bearings of the plastic-encapsulated brushless DC motor, the prior art proposes a design scheme of using ceramic ball bearings (that is, the rolling balls are made of ceramic materials). This design scheme can make the inner ring support of the bearing and the outer ring The brackets are insulated, so that the purpose of preventing electric corro...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide an anti-electric motor bearing structure and a plastic-encapsulated brushless DC motor. The technical problem of electric corrosion of the bearing caused by the potential difference between the ring brackets

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