JPS6248147U

JPS6248147U -

Info

Publication number: JPS6248147U
Application number: JP13746485U
Authority: JP
Priority date: 1985-09-10
Filing date: 1985-09-10
Publication date: 1987-03-25

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示す縦断面図である
。１……モータハウジング、２……軸受支え部、
３……ステータ、４ａ……軸受穴、５……ロータ
、６……回転軸、９……ロータマグネツト、１０
……ヘリングボーン状溝、１１〜１４……マグネ
ツト、１８……位置センサ。 The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1...Motor housing, 2...Bearing support part,
3... Stator, 4a... Bearing hole, 5... Rotor, 6... Rotating shaft, 9... Rotor magnet, 10
...Herringbone groove, 11-14...Magnet, 18...Position sensor.

Claims

[Claims for Utility Model Registration] A rotary shaft of a rotor to which a media is attached is rotatably inserted into a bearing hole in a bearing support portion formed in a motor housing, and the rotating shaft of a rotor to which a media is attached is rotatably inserted into a bearing hole in a bearing support portion formed in a motor housing, and In a media drive brushless motor that controls the excitation of a stator attached to the outer periphery of the bearing support based on the detection of the rotor rotational position by a position sensor, a large number of dogleg-shaped shafts are arranged on the circumferential surface of the rotating shaft. A plurality of herringbone-shaped grooves are carved in parallel to each other with the grooves oriented in the same direction, and magnets are attached to the upper and lower ends of the rotating shaft, respectively, and other magnets are attached vertically facing these magnets. are attached to the upper part of the bearing support part and the bottom of the bearing hole, respectively, and the repulsive force between the lower magnets is larger than the repulsive force between the upper magnets.