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Spiral spring of a brush holder

A technology of coil spring and brush holder, applied in the field of coil spring, can solve the problems of switching mass loss, brush wear and so on

Inactive Publication Date: 2017-10-13
VALEO EQUIP ELECTRIC MOTEUR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] like figure 1 As shown, this causes a significant change in the starter's voltage signal in the starter's operating range P, in this case in the range of 4V to 8V, resulting in a loss of switching quality and electrical Brushes wear prematurely due to galvanic corrosion

Method used

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  • Spiral spring of a brush holder
  • Spiral spring of a brush holder
  • Spiral spring of a brush holder

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] figure 2 A brush holder 10 according to the invention is shown, which is designed for use with a starter of a motor vehicle. This brush holder 10 comprises a support plate 12 having a substantially annular shape around an axis X, on which is fixed a series of brush holders 13 , each brush holder serving as a receptacle for a brush 15 . The axis X of the support plate 12 corresponds to the axis of the brush holder 10 .

[0031] exist image 3 The support plate 12 , which can be clearly seen in , is part of a single piece comprising a metal plate 121 and a layer 122 overmoulded on both sides of the metal plate 121 . Layer 122 is made of plastic material, which ensures good electrical insulation. The overmolding layer 122 covers all areas of the plate 12 that are at risk, ie all areas where short circuits may occur. The overmold layer 122 is heat sensitive and deformable from a predetermined temperature so as to be able to cause a short circuit when overheating occurs...

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PUM

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Abstract

The invention mainly relates to a spiral spring (36) of a brush holder for a motor vehicle starter. Said spiral spring includes: - a rolled-up portion (37) having a plurality of turns (371); and - an arm (39) for engaging one surface of a brush of the brush holder. The invention is characterized in that said spiral spring (36) also comprises a means (42) for reducing the friction between at least two adjacent turns (371) of said rolled-up portion (37).

Description

technical field [0001] The present invention relates to an improved helical spring for brush holders of motor vehicle starters, and corresponding brush holders and starters. The invention has a particularly advantageous but not exclusive application in motor vehicle starters, in particular starters installed in vehicles equipped with the function of automatically stopping and restarting the thermal engine (so-called stop and start function). Background technique [0002] In a known manner, the brush holder is fitted around the shaft of the rotor of the starter, such as with brushes cooperating with collectors integral with the shaft of the rotor. A brush holder includes a support plate that supports a series of cages, each cage serving as a receptacle for a brush. Brushes made of electrically conductive material allow the power supply to the rotor by switching the current in the conductors of the rotor. [0003] For this purpose, each brush comprises a face designed to rub...

Claims

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Application Information

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IPC IPC(8): H02K5/14H01R39/38
CPCH01R39/381H01R39/415H01R39/46H01R2201/26H02K5/148H01R39/38
Inventor M-A.纳林P.莫伦M.金蒂尔A.博斯特W.佩斯
Owner VALEO EQUIP ELECTRIC MOTEUR
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