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Commutator and manufacture method thereof

A manufacturing method and commutator technology, applied in the field of commutators, can solve problems such as large cracks, softening of copper sheets, and unfavorable coil hanging.

Inactive Publication Date: 2014-09-24
JOHNSON ELECTRIC SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large difference in expansion coefficient between copper and graphite, there will be more and larger cracks on the graphite after it is made, and the copper sheet baked at such a high temperature will become soft, which is not conducive to the hanging of the coil

Method used

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  • Commutator and manufacture method thereof
  • Commutator and manufacture method thereof
  • Commutator and manufacture method thereof

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Embodiment Construction

[0014] The technical solutions and other beneficial effects of the present invention will be apparent through the detailed description of specific embodiments of the present invention below in conjunction with the accompanying drawings. The drawings are provided for reference and illustration only, and are not intended to limit the present invention. The dimensions shown in the drawings are only for the convenience of clear description, and do not limit the proportional relationship.

[0015] The first embodiment of the present invention such as figure 1 The manufacturing method of shown commutator 10 comprises the following steps:

[0016] Step 1: Stamping and pressing out such as figure 2 The copper sheet 20 shown. The copper sheet 20 includes a sheet-shaped ring 22 with a through hole in the center, a convex strip 24 extending radially outward from the ring 22, and a plurality of protrusions 26 extending from the radially inner and outer sides of the ring 22, and the pr...

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Abstract

A commutator (10) comprising a plurality of commutator bars (12) formed from a graphite structure (30) and a metal sheet (20) having soldered to the graphite structure (30) includes a brazing process followed by a soldering process. The brazing process includes applying a brazing material the graphite structure (30) and brazing at an elevated temperature to form a brazing layer (40). The soldering process includes applying a solder material to the brazing layer (40), placing the metal sheet (20) on the solder material, and soldering to form a solder layer (50) affixing the metal sheet (20) to the graphite structure (30). A plurality of grooves (70) are cut in the graphite structure (30) and the metal sheet (20) to form the commutator bars (12) arranged in an intermittent ring or circle.

Description

technical field [0001] The invention relates to a commutator, in particular to a commutator whose commutator piece is made of graphite and a manufacturing method thereof. Background technique [0002] The commutator usually includes a plurality of commutator segments and a plurality of hooks electrically connected to the corresponding commutator segments, and the hooks are used for hooking the coil to be electrically connected with the coil. At present, the commutator segments and hooks of most commutators are made of integrally punched copper sheets. However, due to the large difference between the hardness of the carbon brush and the hardness of copper, the carbon brush wears seriously during the working process. Therefore, there is a kind of improvement is to use graphite sheet to replace the above-mentioned copper commutator piece, which involves the connection problem of this commutator piece and the above-mentioned hook made of copper. In the prior art, a nickel or co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R43/06H01R39/04H01R39/32
CPCH02K13/006H01R43/06
Inventor 邹志平郭建军杜志恒郑宗晖
Owner JOHNSON ELECTRIC SHENZHEN
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