Brush device having a braided wire for an electrical machine

A brush device, stranded wire technology, applied in the direction of electromechanical devices, circuits, current collectors, etc., to achieve the effect of expanding the wear length and improving the wear length

Inactive Publication Date: 2010-09-15
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such wear lengths are not sufficient for applications with higher loads, e.g. for higher reversing cycles and longer operating times for a defined service life required

Method used

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  • Brush device having a braided wire for an electrical machine
  • Brush device having a braided wire for an electrical machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] figure 1 A brush arrangement 1 according to the invention is shown in a schematic side view with a brush holder 2 in which a brush 3 is accommodated. The brushes 3 are prestressed by the spring 4 against the commutator 5 and pressed against the commutator 5 . The brush 3 has brush shoulders 6 , 7 arranged parallel to the spring 4 in the radial direction R, which are arranged in the axial direction A in front of and behind the spring 4 . According to the manufacturing method according to the invention, at least two twisted wires, a first twisted wire 8 and a second twisted wire 9, are pressed into the brush 3 in the brush shoulders 6, 7 . The first and second litz wires 8 , 9 have a smaller cross section than the single litz wires 10 according to the prior art, which are radially divided in the brush 3 Arranged in series below the spring 4. The litz wires 10 are marked with dotted lines, since they represent the prior art and do not represent an embodiment according ...

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PUM

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Abstract

The invention relates to a brush device (1) for an electrical machine having a brush mount (2) comprising a brush (3) accommodated therein, having a first integrated braided wire (8) comprising a spring (4), which pretensions the brush (3) against a commutator (5). In order to create an E-machine having an improved life span, at least one second braided wire is integrated in the brush (3).

Description

technical field [0001] Brush assembly for an electric motor with a brush holder, with brushes accommodated in the brush holder, in which a first litz wire is integrated, the brush assembly also with A spring that prestresses the brushes in the brush holder relative to the commutator. Background technique [0002] Mechanically commutated electric machines (motors) with litz wires each integrated in the brushes are known. Mechanically commutated DC motors are used to start internal combustion engines. Current is introduced into the armature winding via the commutator via one or more brush pairs. The brushes usually consist of a sintered material, which mainly has copper and graphite components. Electric brushes are also called carbon brushes due to their high graphite content. Carbon brushes and commutators are worn out during operation. [0003] DC motors, also known as starter motors, are designed for short periods of operation and are typically set at 30,000 to 60,000 ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H02K5/14H01R39/38H01R39/40
CPCH02K5/148H01R39/36H01R39/40
InventorM·拜尔
OwnerROBERT BOSCH GMBH