Tokyo Parts Industrial Co., Ltd.

Masahisa Tuchiya

A double bearing comprising an inner bearing and an outer bearing, which has a greater oil content than the inner bearing, is used as a bearing for a brushless motor. The inner bearing has an upper bearing part, a lower bearing part, and a central relief part. Gaps are provided between the bearing parts and a bearing housing, along the entire axial length of all of the bearing parts of the inner bearing.

Brushless motor

A rotor type brushless motor comprises a drive magnet having an indexing pole part that extends on one axial side thereof. This indexing pole part is formed at least in the range from the circumferential center of one north pole to the circumferential center of one adjacent south pole, and over no greater than the range from one circumferential end of the one north pole to the other circumferential end of the one south pole. A magnetic flux detector is arranged at a position axially facing the indexing pole part.

Growing community of inventors

Gunma-ken, Japan

Masahisa Tuchiya