JP2585263Y2 - Electric motor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor having a motor room and a pump room mounted on the motor room, and more particularly to a cooling structure thereof.

[0002]

2. Description of the Related Art As a motor of this kind, generally, FIG.
And the structure shown in FIG. This will be described with reference to the drawings. The motor 1 includes a motor chamber 4 sealed with a bottom plate 3 fixed to the motor case 2 so as to cover an opening of a motor case 2 formed of a cylindrical body with one end opened.
And a fan case 6 formed of a cylindrical body fixed to the bottom plate 3 so as to be stacked on the motor case 2 and having an air intake 6a on the bottom surface and an air outlet 6b on the side peripheral surface.
And a pump chamber 7 hermetically closed.

In the motor chamber 4, a shaft 9 rotatably supported by bearings 8a and 8b fixed to the motor case 2 and the bottom plate 3 and extending into the pump chamber 7 is provided. An armature 10 on which a winding is applied is axially mounted on the upper end side of the shaft 9, that is, the motor chamber 4 side, and a fan 11 is axially mounted on the lower end side of the shaft 9, that is, the pump chamber 7 side. I have.

A magnet 13 fixed to the inner peripheral surface of the motor case 2 is provided so as to surround the outer periphery of the armature 10 with a magnetic gap being set. In such a configuration, when a current whose direction is switched by a commutator and a brush (not shown) is supplied to the winding of the armature 10, suction and repulsion occur between the magnet 13 and the armature 10, the armature 10 rotates, and the fan 11 also rotates. Rotate. As the fan 11 rotates, the air intake 6
The air pressure difference between the air outlet 6a and the air outlet 6b causes air to be taken in from the air inlet 6a, and the air is blown out from the air outlet 6b to function as an air pump.

[0005]

However, in the above-described conventional structure, the motor chamber 4 is not provided with the motor case 2.
Therefore, when the output of the motor is increased and the rotation is increased in order to improve the output of the air pump, the temperature in the motor chamber 4 increases due to heat generation. In addition, the output of the motor cannot be increased due to an increase in the temperature in the motor chamber 4, which causes a problem in that the size and the weight are hindered.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to reduce the temperature rise in the motor chamber, and to reduce the size and weight of the electric motor. Is to provide.

[0007]

In order to achieve this object, a motor according to the present invention is provided with a rotatably supported motor.
Armature that is attached to one end of the shaft and this armature
Around the outer periphery of the software with a magnetic gap.
And a magnet attached to the other end of the shaft.
And a fan for closing the armature side.
The motor case is formed by the case,
And provided on the rotation shaft center side of the fan.
Air blowout provided on the air intake and the outer circumference of the fan
Seal the fan with a fan case
A motor having a pump chamber, wherein the motor chamber and a pump
Place the partition separating the room from the center of the partition
With through holes at the center and near the center.
There is .

[0008]

According to the present invention, by forming a pair of through holes in the partition wall at a position distant from the center of the partition wall and near the center of the partition wall, the internal pressures of the motor chamber side and the pump chamber side are increased. And the pressure difference between the inner and outer peripheries of the pump chamber causes air circulation between the pump chamber and the motor chamber.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view of the electric motor according to the present invention, and FIG. 2 is an overall external view of the same. In these figures, the same components as those of the prior art are denoted by the same reference numerals, and detailed description is omitted. The feature of the present invention is that the motor room 4
The bottom plate 3 separating the pump chamber 7 is provided with a through hole 3a at a position away from the center of the bottom plate 3 and a through hole 3b near the center of the bottom plate 3.

With this configuration, a difference in internal pressure is generated between the pump chamber 7 and the motor chamber 4, and the pressure difference between the inner and outer peripheral portions of the pump chamber 7 causes 7 flows through the through-hole 3b to the motor chamber 4 and the air circulates in the motor chamber 4 to circulate through the through-hole 3a.
To the pump chamber 7 again
Ventilation circulation occurs between the motor chamber 4 and the motor. Due to this ventilation circulation, the inside of the motor chamber 4 is cooled, and even if the output of the motor is increased, the rise in temperature can be suppressed, thereby making it possible to maximize the output of the motor. Can be achieved.

In this embodiment, these through holes 3a,
3b, and a plurality of through holes 21a, 22a, 22b in the motor case 2 so that the motor case 2
Is open type. That is, three long groove-shaped through holes 21a formed in an arc shape are provided on the upper surface of the large diameter cylindrical portion 21 of the motor case 2 so as to face the through holes 3a. On the upper surface of the cylindrical portion 22,
Three long groove-shaped through holes 22 a formed in an arc shape are provided, and a through hole 22 b formed in a long groove shape in the vertical direction is provided in a peripheral side surface portion of the small-diameter cylindrical portion 22. The through hole 22b is provided at a position where the influence of the magnet 13 on the magnetic flux density formed in the motor case 2 is small.

An over case 15 which also functions as a waterproof is fixed to the motor case 2 with screws 16 via a bracket 17 to hermetically close the motor case 2. Thus, the motor casing 2 and an open type, and by providing the over-case 15, the air flowing from the through-hole 3 b into the motor casing 2, between the through hole 21a of the motor case 2 and the over casing 15 Flows upward. At this time, the air is cooled by the expansion of the heat radiation area by the over case 15. The cooled air passes through the through-hole 22.
a, 22b flows into the motor case 2.

As described above, the cooling effect is further improved by cooling the circulating air and positively flowing it into the motor case 2 to perform ventilation circulation. Through hole 3 described above
In the structure provided with a and 3b, about 1
A cooling effect of 5 ° C. is obtained, an over case 15 is provided,
In a structure in which the motor case 2 is an open type, about 35
° C cooling effect was obtained.

[0014]

According to the present invention as described above, according to the invention], times
Armor mounted on one end of a rotatably supported shaft
The magnetic gap between the armature and the armature
A magnet arranged to surround the
A fan mounted on the other end of the shaft,
Form a motor room with a motor case that seals the tuner side
Together with the rotation of the fan
Air inlet provided on the center of the shaft and the outer periphery of the fan
In the front with a fan case with air outlet provided on the side
In the electric motor that forms the pump chamber by sealing the fan,
This partition wall between the motor room and the pump room
At the position distant from and near the center of the partition wall,
Since the through hole is formed, a difference in internal pressure is generated between the motor chamber side and the pump chamber side, and a pressure difference between the pump chamber and the motor chamber is caused by a pressure difference between the inner peripheral portion and the outer peripheral portion of the pump chamber. As a result, the motor chamber is cooled, the temperature of the motor can be prevented from rising, and the size and weight of the motor can be reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an electric motor according to the present invention.

FIG. 2 is an overall external view of the electric motor according to the present invention.

FIG. 3 is a front sectional view of a conventional electric motor.

FIG. 4 is an overall external view of a conventional electric motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric motor 2 Motor case 3 Bottom plate 3a Through hole 4 Motor room 6 Fan case 7 Pump room 9 Shaft 10 Armature 11 Fan 13 Magnet 15 Over case 21a Through hole 22a Through hole 22b Through hole

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02K 9/00-9/28

Claims (1)

(57) [Scope of request for utility model registration] An armature pivotally mounted on one end of a rotatably supported shaft, a magnet disposed so as to surround a periphery of the armature with a magnetic gap, and an armature mounted on the other end of the shaft. A motor case is formed by a motor case that seals the armature side, and an air intake port provided on the center of the rotation shaft of the fan and an outer peripheral side of the fan. In a motor in which a pump chamber is formed by hermetically closing the fan with a fan case having an air outlet provided at a position separated from the center of the partition wall by separating the motor chamber from the pump chamber. An electric motor characterized in that through holes are respectively formed in the vicinity of and a center.