JPH02104757U

JPH02104757U -

Info

Publication number: JPH02104757U
Application number: JP1051189U
Authority: JP
Priority date: 1989-01-31
Filing date: 1989-01-31
Publication date: 1990-08-21

Description

[Brief explanation of drawings]

第１図はこの考案に係る減速機構付きモータに
おける含油軸受の固定構造の一実施例による減速
機構付きモータの構造を示す部分破断正面図、第
２図は第１図の含油軸受の固定部分の構造を示す
分解斜視図、第３図は第１図の含油軸受の固定部
分の構造を示す要部断面図、第４図は従来の減速
機構付きモータの構造を示す部分破断正面図であ
る。１…減速機構付きモータ、３…モータ部、３ａ
…ヨーク、４…電機子軸、７…減速機構、８…ギ
ヤケース、１１…第２の含油軸受、２０…突起、
２１…溝、２２…第２の軸受保持穴、２３…突部
（軸受ストツパ）。 FIG. 1 is a partially cutaway front view showing the structure of a motor with a reduction mechanism according to an embodiment of the oil-impregnated bearing fixing structure in a motor with a reduction mechanism according to the present invention, and FIG. 2 shows the fixed part of the oil-impregnated bearing in FIG. FIG. 3 is an exploded perspective view showing the structure, FIG. 3 is a cross-sectional view of a main part showing the structure of the fixed part of the oil-impregnated bearing shown in FIG. 1, and FIG. 4 is a partially cutaway front view showing the structure of a conventional motor with a reduction mechanism. 1...Motor with reduction mechanism, 3...Motor part, 3a
...Yoke, 4...Armature shaft, 7...Reduction mechanism, 8...Gear case, 11...Second oil-impregnated bearing, 20...Protrusion,
21...Groove, 22...Second bearing holding hole, 23...Protrusion (bearing stopper).

Claims

[Scope of utility model registration request]

An oil-impregnated bearing is provided that connects the yoke of the motor section and a resin gear case that houses a speed reduction mechanism that decelerates the rotation of the armature shaft of the motor section, and rotatably supports the armature shaft within the gear case;
In a motor with a speed reduction mechanism that includes a bearing holding hole that holds the oil-impregnated bearing in a gear case, a protrusion is provided on the outer periphery of the oil-impregnated bearing, and the protrusion of the oil-impregnated bearing engages with the bearing holding hole so that the oil-impregnated bearing is A groove is provided to prevent the oil-impregnated bearing from idling, and a bearing stopper is provided which is an inward protrusion caused by thermal deformation at the opening of the bearing holding hole when the oil-impregnated bearing is inserted into the bearing holding hole. Fixed groove structure for oil-impregnated bearings in motors with reduction mechanisms.