Stator and bearing fixing structure of a motor

Details Stator and bearing fixing structure of a motor Stator and bearing fixing structure of a motor

2002-02-15

2003-11-25

Toatley, Jr., Gregory J. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

C310S06700R

Reexamination Certificate

active

06654213

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stator and bearing fixing structure of a motor, and more particularly to a stator and bearing fixing structure of a motor, wherein the stator and the bearing may be assembled conveniently and rapidly, and may have a rigid positioning effect without detachment.
2. Description of the Related Art
A conventional bearing fixing structure of a heatsink fan in accordance with the prior art shown in
FIGS. 1 and 2
is disclosed in Taiwanese Patent Publication No. 328858, and comprises a heatsink frame
90
having a shaft tube
91
formed with multiple openings
92
, thereby defining multiple blades in the shaft tube
91
. Each of the blades of the shaft tube
91
is formed with an upper lug
93
or a lower lug
94
. The upper lugs
93
and the lower lugs
94
of the blades of the shaft tube
91
are arranged in a staggered manner. The distance between the upper lug
93
and the lower lug
94
is the same as the thickness of the bearing
95
, so that the bearing
95
may be retained by the blades of the shaft tube
91
, and may be limited by the upper lugs
93
and the lower lugs
94
.
However, the shaft tube
91
is made with a special structure so that the bearing
95
may be fixed in the shaft tube
91
. Thus, fabrication of the conventional bearing fixing structure of a heatsink fan is not easy.
A conventional stator combination structure of a heatsink fan in accordance with the prior art shown in
FIGS. 3 and 4
is disclosed in Taiwanese Patent Publication No. 179991, and comprises a metallic shaft tube
80
provided with an annular lip
801
slightly greater than the inner diameter of the shaft hole
811
of the stator
81
, so that after the metallic shaft tube
80
is closely fitted into the shaft hole
811
of the stator
81
, the metallic shaft tube
80
may be strongly pressed into the central post hole
821
of the housing
82
.
However, the metallic shaft tube
80
is closely fitted into the shaft hole
811
of the stator
81
, so that the bearing received in the metallic shaft tube
80
will be compressed and deformed. Thus, rotation of the motor easily produces noise due to the deformed bearing, and the lifetime of the motor is decreased.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a stator and bearing fixing structure of a motor, wherein the stator may be fixed on the 11 outer wall of the shaft seat conveniently and rapidly.
A secondary objective of the present invention is to provide a stator and bearing fixing structure of a motor, wherein the bearing may be fixed within the inner wall of the shaft eat conveniently and rapidly.
A further objective of the present invention is to provide a stator and bearing fixing structure of a motor, that has a simple construction, may be made easily, may reduce noise during rotation of the motor, and may increase the lifetime of the motor.
In accordance with the present invention, a stator and bearing fixing structure of a motor includes a housing provided with a shaft seat. The shaft seat has a bottom provided with a bottom stop member. The shaft seat has an outer wall provided with multiple snap members. An insulating seat consisting of an upper insulating plate and a lower insulating plate may isolate a magnetically conductive assembly and may be wound with metallic coils, thereby forming a stator which is mounted on the outer wall of the shaft seat. The upper insulating plate is provided with an annular lip protruded toward a center. and the lower insulating plate is provided with multiple protruding snap members that may be snapped and locked with the snap members of the outer wall of the shaft seat. A bearing is placed in the shaft seat of the housing, and has a first end stopped by the bottom stop member of the shaft seat without detachment, and a second end pressed and positioned by the annular lip of the upper insulating plate of the insulating seat.


REFERENCES:
patent: 4682065 (1987-07-01), English et al.
patent: 5245236 (1993-09-01), Horng
patent: 5363003 (1994-11-01), Harada et al.
patent: 5610462 (1997-03-01), Takahashi
patent: 6102675 (2000-08-01), Hsieh
patent: 6376946 (2002-04-01), Lee

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