JPH10174344A - Electric motor for blower - Google Patents

Abstract

(57) [Problem] To provide an inexpensive electric motor for a blower used in a household water heater, which reduces the number of assembly parts and the number of assembling steps. SOLUTION: A stator 13 is formed by drawing a steel plate.
First housing 1 having an inner diameter formed along the outer circumference of the first housing 1
4 and a bearing 15 for rotatably holding a rotor assembly 16
In the electric motor for a blower holding the bearing 15 and assembling the second housing 18 installed opposite to the first housing 14, it is necessary to hold the bearing 15 and attach the casing 22. Mounting part,
The second housing 18 is provided integrally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor for a blower used for a household water heater or the like.

[0002]

2. Description of the Related Art In recent years, the development of small, lightweight and low-priced electric motors for blowers has rapidly progressed. An example of a conventional blower motor will be described below.

FIG. 4 shows a conventional electric motor for a blower. Referring to FIG. 4, a mold assembly 1 in which each stator of a stator core is insulated and a winding is applied to the stator is resin-molded.
A rotor assembly 3 having bearings 2a and 2b for rotatably holding the rotor; and a housing 4 for holding the bearing 2a.
And a housing 5 for holding the bearing 2b and a mounting plate 7 necessary for mounting a casing 6 provided with an air suction port on one side are fixed with motor mounting screws 8. Further, the impeller 9 and the impeller abutment plate 10 are assembled to the rotor assembly 3 in the above-described configuration, and the rotor assembly 3 is attached with the fixing nuts 11. It is configured to be attached.

[0004]

However, in the above-described conventional example, the housing 4 for holding the bearing 2a and the mounting plate 7 are separate parts, and the rotation of the mold assembly 1 is not limited. Bearings 2a and 2b of the child assembly 3
And the mounting plate 7 is fixed at several places by electric motor mounting screws 8. Therefore, there is a problem that the number of parts is large and the number of assembly steps is also necessarily large.

An object of the present invention is to provide an inexpensive electric motor for a blower in which the number of assembly parts and the number of assembling steps are reduced in a motor provided with such a blower.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a housing for a motor section is provided with a mounting portion necessary for holding a bearing and being mounted on a casing, and the bearing is held in a housing for the motor section. Further, a mounting plate necessary for mounting the stator on a casing is provided with a holding portion for holding a housing in which a stator is press-fitted, thereby reducing the number of assembly parts and man-hours, and realizing an inexpensive blower motor.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a first housing having an inner diameter formed along an outer periphery of a stator, and a bearing for rotatably holding a rotor. ,
An electric motor holding the bearing, and assembling a second housing installed opposite the first housing,
In an impeller in which a number of wings are arranged, and a blower motor including a casing provided with an air suction port on one surface in a height direction of the impeller, the second housing holds the bearing. In addition, the present invention can be implemented by integrally providing a mounting portion necessary for mounting to the casing, thereby reducing the number of assembly parts and man-hours, and realizing an inexpensive blower motor.

According to the present invention, there is provided a first housing having an inner diameter formed along the outer periphery of a stator, a bearing for rotatably holding a rotor, and the bearing. And an electric motor assembled with a second housing installed opposite to the first housing, an impeller on which a number of wings are arranged, and air on one surface in the height direction of the impeller. In the electric motor for a blower provided with a casing provided with a suction port, the second housing holds the bearing, and has a mounting portion necessary for mounting to the casing and a holding portion holding the first housing. Therefore, it is possible to reduce the number of assembly parts and man-hours, and to realize an inexpensive blower motor.

[0009]

1 to 3 show an embodiment of the present invention.
This will be described with reference to FIG.

(Embodiment 1) In FIG. 1, a stator 13 in which each slot of a stator core is insulated and wound is formed by drawing a steel plate, and an inner diameter along the outer periphery of the stator is formed. After being press-fitted into the first housing 14 and fixed, a rotor assembly 16 having a bearing 15 for rotatably holding the rotor is inserted, and a drive circuit component, a position sensor and a connector used for power supply and the like are inserted. A printed wiring board 17 having a post is connected to the stator 13, and a second housing 18, which holds the bearing 15 and is installed to face the first housing 14, is assembled. Further, the impeller 19 having a large number of wings arranged in the above configuration and the impeller contact plate 20 are assembled to the rotor assembly 16 and fastened with the fixing nut 21 in the height direction of the impeller 19. A casing 22 provided with an air suction port on one side is fastened with a casing mounting screw 23 at several places.

With the above arrangement, the brushless motor for a blower according to the first embodiment has a second housing integrally provided with a mounting portion necessary for holding a bearing and mounting on a casing. Fig. 4
Thus, an inexpensive motor for a blower, which is less than the conventional example shown in FIG.

Embodiment 2 FIG. 2 shows a first housing 1.
In the second housing 18 installed opposite to 4, the bearing 15 is held, and after the first housing 14 is assembled, it is held at several places by the claw portions 24,
FIG. 3 shows the second housing 18 before being assembled to the first housing 14, which is clamped when the first housing 14 is assembled using several claw portions 24.

With the above configuration, the brushless motor for a blower according to the second embodiment can hold and hold the bearing and the mounting portion necessary for mounting to the casing 22, and the first housing 14. This is a second housing 18 having a holding portion, and as compared with the conventional example shown in FIG. 4, the number of assembly parts and the number of assembly steps are reduced, and an inexpensive blower motor can be realized.

In the above description, an example of a brushless motor having a blower has been described. However, the present invention can be applied to a motor having another blower.

[0015]

As described above, according to the present invention, the housing of the motor unit is provided integrally with a mounting portion necessary for holding the bearing and mounting the bearing on the housing. A mounting part necessary for holding the housing and mounting it to the casing, and a holding part capable of holding the housing in which the stator is press-fitted are provided, thereby reducing the number of assembly parts and man-hours, and realizing an inexpensive blower motor. An advantageous effect is obtained.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view of a brushless motor for a blower according to a first embodiment of the present invention.

FIG. 2 is a side view showing a main part of a brushless motor according to a second embodiment of the present invention in cross section.

FIG. 3 is a front view of a second housing of the brushless motor.

FIG. 4 is an exploded sectional view of a blower motor in a conventional example.

[Explanation of symbols]

 14 first housing 15 bearing 18 second housing 19 impeller 22 casing 23 casing mounting screw 24 claw

Claims (2)

[Claims] A first housing having an inner diameter formed along an outer periphery of a stator; a bearing for rotatably holding a rotor; a bearing for holding the bearing, and facing the first housing. Motor having a second housing mounted thereon, an impeller provided with a number of blades, and a casing provided with a casing provided with an air suction port on one surface in a height direction of the impeller. , Wherein the second housing integrally includes a mounting portion for holding the bearing and mounting the bearing to the casing. 2. A first housing having an inner diameter formed along an outer periphery of a stator, a bearing for rotatably holding a rotor, a bearing for holding the bearing, and facing the first housing. Motor having a second housing mounted thereon, an impeller provided with a number of blades, and a casing provided with a casing provided with an air suction port on one surface in a height direction of the impeller. The electric motor for a blower according to any one of claims 1 to 3, wherein the second housing includes a mounting portion necessary for holding the bearing and mounting the bearing on the casing, and a holding portion for holding the first housing.