JPS63143066U

JPS63143066U -

Info

Publication number: JPS63143066U
Application number: JP3502687U
Authority: JP
Priority date: 1987-03-10
Filing date: 1987-03-10
Publication date: 1988-09-20

Description

[Brief explanation of drawings]

第１図は本考案に係るブラシレスモータの一実
施例を示す断面図、第２図〜第４図は従来のブラ
シレスモータの要部を示す断面図である。１，５５…ロータヨーク、３，６１…側壁、５
，６３…主マグネツト、７，５３…ロータシヤフ
ト、９，５６…ねじ（取付けねじ）、１１，６５
…ロータ、１３…段部、１７，５７…はめ込み孔
、１９，５９…屈曲部、２１…はめ込み環、２３
，２９…軸受ケーシング、２７，３３，３５…ボ
ールベアリング、２７ａ，３３ａ…内輪、３７…
回転基板、４３…磁心、５１…駆動コイル、６７
…非ねじ部。 FIG. 1 is a sectional view showing an embodiment of a brushless motor according to the present invention, and FIGS. 2 to 4 are sectional views showing essential parts of a conventional brushless motor. 1,55...Rotor yoke, 3,61...Side wall, 5
, 63... Main magnet, 7, 53... Rotor shaft, 9, 56... Screw (installation screw), 11, 65
... Rotor, 13... Step part, 17, 57... Fitting hole, 19, 59... Bent part, 21... Fitting ring, 23
, 29... Bearing casing, 27, 33, 35... Ball bearing, 27a, 33a... Inner ring, 37...
Rotating board, 43...Magnetic core, 51...Drive coil, 67
...Non-threaded part.

Claims

[Claims for Utility Model Registration] A cylindrical bearing casing, a ball bearing attached to at least one end of a hollow portion of the bearing casing, a drive coil disposed in the bearing casing, and one end thereof. a rotor shaft rotatably supported by the ball bearing so that its surface does not protrude from the ball bearing; a rotor yoke having a main magnet facing the drive coil and having a fitting hole in the center; a screw having a threaded portion, which passes through the fitting hole and aligns the non-threaded portion with the fitting hole, and presses the rotor yoke screwed into the rotor shaft against the end surface of the inner ring of the ball bearing; A brushless motor comprising: