Dc motor


PURPOSE:To eliminate radio wave fault by burying a metallic shielding plate in a terminal base, pressing an earth electrode cylinder for surrounding a noise preventive element and a yoke opening end to the shielding plate and thus absorbing high frequency noise generated from the interior of a DC motor. CONSTITUTION:A metallic shielding plate 14 is buried in a terminal fixing base 4 made of synthetic resin. The base 2 of a brush 1 is passed through a noise preventive element 3, projected therefrom, and an earth electode cylinder 3a for surrounding the element 3 is pressed on the shielding plate 14. When the terminal fixing base 4 is associated with the yoke 7, the shielding plate 14 is pressed on the opening end of the yoke 7, and a noise preventive element 13 is disposed inside surrounded by the yoke 7 and the shielding plate 14. Thus, the high frequency noise can be absorbed to the noise preventive element, and the radio wave fault to the external equipment can be eliminated.




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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    FR-2774526-A1August 06, 1999Bosch Gmbh RobertMoteur a collecteur avec deux ou plusieurs raccords d'alimentation (+, -) permettant un deparasitage ameliore
    JP-2009281421-ADecember 03, 2009Teikoku Piston Ring Co Ltd, 帝国ピストンリング株式会社ピストンリング
    JP-H0539158-UMay 25, 1993株式会社三協精機製作所小型直流モータ
    WO-9940671-A1August 12, 1999Robert Bosch GmbhKollektormotor