JPH0428762U

JPH0428762U -

Info

Publication number: JPH0428762U
Application number: JP7075090U
Authority: JP
Priority date: 1990-07-03
Filing date: 1990-07-03
Publication date: 1992-03-06
Anticipated expiration: 2004-10-19
Also published as: JPH0640454Y2

Description

[Brief explanation of the drawing]

図面は、本考案に係るウオーム減速機構付モー
タの組付け構造の実施例を示したものであつて、
第１図は要部を断面したモータの側面図、第２図
Ａ，Ｂはモータフレームの断面図、底面図、第３
図はケーシングのモータフレーム取付面である。２ａはコンミテータ、３はモータヨーク、４は
モータ軸、５はウオームギア、６はボールメタル
、７はモータフレーム、７ａは貫通孔、９は刷子
、９ａは刷子ホルダ、１０は突出片、１０ａはボ
ールメタル保持部、１０ｂは面取り、１２はケー
シング、１３はウオームホイール、１４は支持孔
、１４ａは平面部である。 The drawings show an embodiment of the assembly structure of a motor with a worm reduction mechanism according to the present invention,
Figure 1 is a side view of the motor with main parts cut away, Figures 2A and B are sectional views and bottom views of the motor frame, and Figure 3 is a cross-sectional view of the motor frame.
The figure shows the motor frame mounting surface of the casing. 2a is a commutator, 3 is a motor yoke, 4 is a motor shaft, 5 is a worm gear, 6 is a ball metal, 7 is a motor frame, 7a is a through hole, 9 is a brush, 9a is a brush holder, 10 is a protruding piece, 10a is a ball A metal holding portion, 10b is a chamfer, 12 is a casing, 13 is a worm wheel, 14 is a support hole, and 14a is a flat portion.

Claims

[Scope of utility model registration request]

A large diameter worm gear integrally attached to the tip of the motor shaft protruding from the opening edge of the motor yoke is meshed with a worm wheel housed inside a casing that is integrally attached to the opening edge side of the motor yoke. In a motor with a worm reduction mechanism configured by integrally interposing a motor frame provided with a brush holder for a brush that comes into sliding contact with a commutator between an opening edge of the motor yoke and a casing, the motor shaft is connected to the motor shaft. The bearing is freely rotatably inserted into the motor frame at a position on the casing side and at an intermediate position between the motor yoke opening edge and the worm gear attachment part, while a through hole is formed in the motor frame to allow the worm gear and the bearing to pass through. ,
A bearing holding part is formed at the tip to fit and hold the outer peripheral surface of the bearing so as to restrict movement in the axial direction of the bearing that has passed through the through hole, and a plurality of protruding pieces having elasticity in the radial direction are attached to the worm gear side. The bearing is supported by the casing via the bearing holder by fitting the outer circumferential surface of the bearing holding part into contact with the inner circumferential surface of a support hole formed in the casing. and a worm reduction mechanism characterized in that the contact surface between the bearing holding part and the support hole of the casing is made non-circular to form a rotation regulating means for regulating rotation of the bearing holding part about the axis. Motor assembly structure.