High-strength groove type commutator

Abstract

The invention belongs to the technical field of commutators, and particularly relates to a high-strength groove type commutator, which comprises commutation copper sheets, a plastic mold core and mica sheets, wherein the commutation copper sheets are uniformly distributed around the periphery of the plastic mold core, a gap exists between the adjacent commutation copper sheets to form an insulation gap, the mica sheets for separating the adjacent commutation copper sheets are arranged in the insulation gap, the upper end face of the mica sheet is higher than the upper end face of the commutation copper sheet and lower than the upper end face of the plastic mold core, and a semi-enclosed space higher than the commutation copper sheet is formed between the upper end of the mica sheet and the upper end of the plastic mold core; through the arrangement of the mica sheets, the mica sheets and the plastic mold core can form a semi-enclosed space higher than the commutation copper sheets, so that the contact between the adjacent side surfaces of the adjacent commutation copper sheets can be prevented, and the condition that the adjacent commutation copper sheets are in contact due to the existence of welding slag caused by the fact that the welding slag generated after wire welding of the wire welding grooves enters the upper ends of the commutation copper sheets can be reduced; therefore, the safety performance is ensured.

Description

technical field [0001] The invention belongs to the technical field of commutators, in particular to a high-strength slot-type commutator. Background technique [0002] The commutator is widely used in power tools. The commutator with welding steps is generally a slot type commutator. The top outer circle molding. [0003] When the existing commutator wire groove is performing welding of metal wires, welding slag may fall on the top end surface of the commutation copper sheet, so that welding slag contact occurs between adjacent commutator copper sheets, and the above-mentioned foreign matter contacts It will have extremely adverse effects on the work of the commutator. In addition, the existing slot-type commutator has fewer bonding points between the commutating copper sheet and the plastic matrix of the commutator, and the bonding force is not ideal, so it is difficult to better ensure the mechanical strength to improve the overspeed performance of the commutator . C...

AI Technical Summary

Problems solved by technology

[0004] In order to make up for the deficiencies in the prior art, the present invention proposes a high-strength grooved commutator. The present invention is mainly used to solve the problem that the welding slag may fall off when the welding wire groove of the existing commutator is performing welding of metal wires. Falling on the top end face of the reversing copper sheet causes welding slag contact between adjacent reversing copper sheets, and the welding slag contact will cause extremely adverse effects on the work of the commutator

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