Grinding device for alternating-current motor carbon brushes

Abstract

The invention relates to a grinding device for alternating-current motor carbon brushes. The grinding device is characterized in that a spindle (2) is fixed on a base (1) through a C-shaped flat key and a bolt (4), a bearing cap (9) and an angular contact ball bearing (13) are mounted on the spindle (2), the bearing chamber of a large rotary cover (8) is mounted on the outer ring of the angular contact ball bearing (13), the angular contact ball bearing (13) is connected with the spindle (2) through a bolt (10), a grinding cylinder (14) is mounted on the spindle (2), a first support sleeve (15) and a second support sleeve (16) sequentially sleeve the spindle (2), and a pressing cap (17) is mounted on the upper portion of the spindle (2) and connected to the spindle (2) through a nut (18). The grinding device has the advantages that the grinding device can replace a collecting ring; the cylindrical grinding cylinder can facilitate the fixing of an abrasive belt, carbon powder generated during grinding falls freely instead of remaining on the surface of the grinding cylinder, cleaning is facilitated, multiple groups of carbon brushes can be ground at the same time, the grinding condition of the carbon brushes can be observed conveniently, new carbon brushes can be replaced at any time, a good carbon brush grinding effect is achieved, and oxidization films can be favorably built between the carbon brushes and collecting rings during the operations of motors.

Description

technical field [0001] The invention relates to a carbon brush grinding device for an alternating current motor. Background technique [0002] For the wound type AC motor, the brush is an important part of the wound type AC motor. The external circuit is connected to the armature circuit by sliding contact between the brush holder and the rotating collector ring in the brush rod assembly. In order to ensure a better contact effect between the brush and the collector ring, the contact surface of the brush should be processed into an arc shape corresponding to the collector ring. The common method is to rotate a fine abrasive cloth around the surface of the motor collector ring and grind it repeatedly. At this time, a large amount of toner will be generated on the surface of the collector ring, which is not easy to clean. After blowing with air, some of the toner will enter the inside of the motor, which will also affect the quality of the motor products. At the same time, the...

AI Technical Summary

Problems solved by technology

In order to ensure a better contact effect between the brush and the collector ring, the contact surface of the brush should be processed into an arc shape corresponding to the collector ring. The common method is to rotate the fine emery cloth around the surface of the motor collector ring and grind it repeatedly. Electric brush, at this time, a large amount of carbon powder will be produced on the surface of the collector ring, which is not easy to clean. After blowing with air, part of the carbon powder will enter the interior of the motor, which will also affect the quality of the motor product. At the same time, the quality of brush grinding not high

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