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Brushes for a dynamo-electric machine

A brush, commutated motor technology, applied to circuits, current collectors, electrical components, etc., can solve the problems of increasing the thermal load of the commutator and sliding contact system, unevenness of the motor, heating of the commutator, etc., to improve the surface Pressure curve graph, shorten start-up time, avoid tilting/topping effect

Inactive Publication Date: 2008-04-30
BSH BOSCH & SIEMENS HAUSGERAETE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to contact interruptions and uneven running of the motor, and also to severe wear of the brushes
In addition, arcing can also occur during the lifting and / or lowering of the brushes from the commutator, causing additional heating of the commutator and further wear of the brushes due to ablation
So further increases the thermal load on the commutator and sliding contact system

Method used

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  • Brushes for a dynamo-electric machine
  • Brushes for a dynamo-electric machine
  • Brushes for a dynamo-electric machine

Examples

Experimental program
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Effect test

Embodiment Construction

[0029] A motor, especially a commutator ( figure 1 to 3) There are a plurality of commutator segments 2 which extend longitudinally, ie parallel to the axis of rotation x of the electric motor, on the outer circumference of the commutator 1 . The commutator segments 2 are separated from one another by slots or grooves 3 . The brushes 4 bear against the commutator segments 2 in the y-direction. The brushes 4 are pressed against the commutator segments 2 by a brush guide 5 . Pressure is applied to the commutator segment 2 by a spring element, in particular a spring 6 ( FIGS. 4 , 5 ).

[0030] Such as figure 1 As shown, the brush 4 rotates about the z-axis in the xy plane, so that the brush 4 presses against the commutator segment 2 in an oblique direction w. Relative to the direction w, a spring force F 弹簧 Continue to tilt in the xy plane. A spring 6 ( FIGS. 4 , 5 ) presses the brush 4 against the commutator segments 2 of the commutator 1 .

[0031] So the spring force F ...

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PUM

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Abstract

A brush (4) for a mechanically-commutated dynamo-electric machine, in a particular an electric motor, is arranged in a brush guide (5), for the generation and / or maintenance of an electrical contact or slip contact between a fixed first piece, for example, a current supply and a commutator (1) with lamellae (2), whereby an elastic element (6) presses the brushes (4) against the lamellae (2). According to the invention, an improvement in the commutation can be achieved with a stable brush position. The above is achieved, whereby the brush (4) is embodied such that the elastic element (6) exerts a force on the brush (4) at an angle different to the perpendicular on the front face of the brush (4) facing away from the commutator (1).

Description

technical field [0001] The invention relates to a brush for mechanically commutated motors, in particular electric motors, arranged in a brush guide to establish and / or hold in fixed first parts, such as the power supply and the commutator with commutator segments. Electrical or sliding contact between commutators, where a resilient element presses the brushes against the commutator segments. Background technique [0002] In electrical machines, such as electric motors, generators or other machines, brushes and brush assemblies are used within sliding contact systems to establish electrical contact. Electrical contact is established and / or maintained between a generally stationary first part and a movable second part by a sliding contact system. [0003] A particularly important field of use of sliding contact systems is electric motors, so only this part of the range of electric motors is discussed and described below, but use in other machines is not excluded. In electri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R39/26H01R39/38
CPCH01R39/381H02K23/18H02K5/148H02K13/10H02K2213/03
Inventor O·佩特拉斯卡D·茨瓦达
Owner BSH BOSCH & SIEMENS HAUSGERAETE GMBH
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