Motor bearing electric corrosion-prevention structure and plastic packaging brushless direct current motor

Abstract

The invention belongs to the motor field and discloses a motor bearing electric corrosion-prevention structure and a plastic packaging brushless direct current motor. The motor bearing electric corrosion-prevention structure includes a rotating shaft, a first bearing installed at one end of the rotating shaft, a first bearing supporting frame which sleeves the first bearing, an electric conduction cover which is in electric conduction connection with the first bearing supporting frame, an elastic electric conduction assembly which is electrically connected between the electric conduction cover and the rotating shaft; the electric conduction cover sleeves the first bearing supporting frame; the rotating shaft is provided with an extension portion which extends out from the interior of the first bearing supporting frame and extends into the electric conduction cover; and the elastic electric conduction assembly is installed in the electric conduction cover and is elastically connected between the electric conduction cover and the extension portion. According to the motor bearing electric corrosion-prevention structure of the invention, the electric conduction cover and the elastic electric conduction assembly are adopted, so that electric conduction connection between an inner peripheral support and an outer peripheral support of the first bearing can be realized, and potential difference between the inner peripheral support and the outer peripheral support of the first bearing can be eliminated, and electric corrosion of the first bearing can be avoided, and the first bearing can have the advantages of low manufacture cost, high shock resistance and high load capacity.

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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