JPS61185272U

JPS61185272U -

Info

Publication number: JPS61185272U
Application number: JP6946685U
Authority: JP
Priority date: 1985-05-09
Filing date: 1985-05-09
Publication date: 1986-11-19

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例によるスタータ用
直流電動機を示すもので、ａはその要部断面図、
ｂはａの要部縦断面図、第２図はこの種の従来装
置の一例を示す要部断面図である。図中、２は固定子、６は後部機枠、１０は突設
部、１１は電機子、１２は回転軸、１３は第１の
スリーブベアリング、１４は整流子、１５は凹溝
、１９はモールド材、２０はセグメント、２１は
刷子装置、２９は第２のスリーブベアリングであ
る。尚、図中同一符号は同一又は相当部分を示す
。 FIG. 1 shows a starter DC motor according to an embodiment of this invention, and a is a cross-sectional view of its main parts;
b is a longitudinal cross-sectional view of the main part of a, and FIG. 2 is a cross-sectional view of the main part showing an example of this type of conventional device. In the figure, 2 is a stator, 6 is a rear machine frame, 10 is a protrusion, 11 is an armature, 12 is a rotating shaft, 13 is a first sleeve bearing, 14 is a commutator, 15 is a groove, and 19 is a 20 is a segment, 21 is a brush device, and 29 is a second sleeve bearing. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of claims for utility model registration] (1) In a starter equipped with a DC motor,
A protruding part is provided at the bottom of the rear machine frame, and a first bearing device for supporting the rotating shaft is provided on the inner circumferential surface of the protruding part, and the outer circumferential surface of the protruding part and the groove of the commutator are connected to each other. A starter characterized in that a second bearing device is disposed between the starter. (2) The second bearing device consists of a sleeve bearing mounted on the inner surface of the concave groove of the commutator, and a gap is provided between the inner circumferential surface of the sleeve bearing and the outer circumferential surface of the above-mentioned protrusion. The starter according to claim (1) of the utility model registration, characterized in that the gap is set larger than the bearing gap of the rotating shaft. (3) The starter according to claim (1), wherein the second sleeve bearing is mounted on the outer peripheral surface of the protrusion of the rear machine frame.