Mabuchi Motor Co., Ltd.

Tanaka Kikinzoku Kogyo K.k.

Hideyuki Uzawa

Keiji Nakamura

Takao Asada

Yasuhiro Yamagata

Osamu Sakaguchi

Masahiro Takahashi

Yasuhiro Hashimoto

Yoshinori Horiuchi

Makoto Takabatake

Provided is a brushed motor in which noise in a high rotational speed range is effectively decreased. A bar-shaped flat attachmentof synthetic resin is inserted along an axial line L into an opening of a slotformed in a coreof a rotor, and fixed with respect to the coreand/or windingsusing adhesive agent. The flat attachmenthas side surfacesand an inner peripheral surface. The side surfacesare engaged from an inner peripheral side with inclined surfacesof teethadjacent to each other across the opening of the slot. The inner peripheral surfaceof the flat attachmenthas two ridgesprotruding therefrom which are abutted against the windings. The flat attachmentcloses the opening of the slotand shapes an outer peripheral surfaceof the coreinto a flat cross sectional shape suitable for suppression of wind noise.

Brushed motor

[Problem to be Solved] There is provided a highly wear-resistant and durable sliding contact material applicable to a commutator of a motor used for high-capacity applications in which the initial starting current (IS) is 1 ampere or higher. [Solution] The present invention provides a sliding contact material in which metal oxide particles are dispersed in an Ag alloy matrix, wherein the Ag alloy matrix is an Ag alloy containing 0.01 to 10.0 wt % of at least one kind of Fe, Co, Ni and Cu in Ag, and 0.1 to 3.0 wt % of a Ta oxide is dispersed as the metal oxide. In the present invention, 0.1 to 10.0 wt % of metal oxide particles of one kind or two or more kinds of Mg, Fe, Co, Ni and Zn may further be dispersed. The sliding contact material is used in a mode of clad composite material formed by embedding the sliding contact material in a part of a base material consisting of Cu or Cu alloy.

Sliding contact material, clad composite material, and motor

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Chiba, Japan

Hideyuki Uzawa