JPH07243400A - Electric blower - Google Patents

Abstract

PURPOSE:To provide an electric blower with fewer part items, good assembling property and high suction performance. CONSTITUTION:This electric air blower is provided with a stator 22, a rotor 17, and a fan 19 which rotates together with the rotor 17, a casing 20 which covers the upper part of the fan 19, a load-side bracket 15 which holds the load-side bearing of a rotor 17, an air guide 14 which is fitted into the upper part of the load-side bracket 15, and a non-load-side bracket 16 which holds the bearing on the non-load side (non-fan side). It is thus possible to form multiple protrusions whose upper surfaces are inclined on the outer peripheral surface of an air guide 14, and use the protrusions for fitting the air guide 14 into the non-load-side bracket 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blower used for an electric vacuum cleaner.

[0002]

2. Description of the Related Art In recent years, the high output of suction power of electric vacuum cleaners has become remarkable, and electric vacuum cleaners of the type that perform cleaning more effectively with high suction power have become mainstream.

Conventionally, an electric blower of this type generally has a structure as shown in FIG. The configuration will be described below with reference to the drawings.

As shown in the figure, the motor 1 forms an outer contour from the air guide 2, the load side bracket 3 and the anti-load side bracket 4, and the shaft 6 of the rotor 5 projects toward the air guide 2 side, and the fan 7 is located there. It was fixed. A casing 8 covers the front of the fan 7, and an intake port 9 is opened at the center of the casing 8 so as to face the fan 7. The air guide 2 is fixed to the load side bracket 3 with a screw 10, the counter load side bracket 4 holds the stator 11, and an exhaust port 12 is opened below the stator 11. That is, the motor 1 having an outer structure formed by the air guide 2, the load side bracket 3, and the anti-load side bracket 4
In addition, the fan 7 and the casing 8 are combined.

In the above configuration, when the motor 1 is operated, the fan 7 rotates at a high speed with the rotation of the rotor 4 to generate a suction force, and the air sucked from the intake port 9 passes through the motor 1 and the rotor 5 After the stator 11 is cooled, it is discharged from the exhaust port 12.

[0006]

In such a conventional electric blower, the suction motor has been required to have a high output as the electric vacuum cleaner has become higher in power in recent years. Therefore, the air volume of the motor 1 is increased. , Vacuum pressure, and input are high. In addition, the parts dimensions of the air guide 2, the load side bracket 3, the anti-load side bracket 4, etc. are required to have high precision,
Since it was necessary to screw the parts together with screws in order to prevent air leakage, the number of parts was large and the assemblability was poor. Furthermore, since the air guide 2 and the load side bracket 3 are fixed by the screw 10 near the central portion, the air guide 2
There is a risk that the outer peripheral portion of the product will float easily, a gap will be created between the bracket 4 and the anti-load side bracket 4, air leakage will occur, and the suction performance will deteriorate. In addition, since the air guide 2 is fitted into the anti-load side bracket 4, it is necessary to make the casing 8 stepped in order to prevent the air guide 2 from being lifted up. There is a gap between the side brackets 4 and air leakage easily occurs, and the diameter of the air guide 2 is limited by the thickness of the anti-load side bracket 4, so that there is a limit to improving the suction performance.

An object of the present invention is to solve the above-mentioned problems, and an object thereof is to provide an electric blower having a small number of parts, a good assembling property, and a good suction performance.

[0008]

To achieve the above object, a first means of the present invention is to provide a stator, a rotor, a fan rotating together with the rotor, a casing covering the upper side of the fan, and a lower part of the fan. A load side bracket that holds the load side bearing, an air guide that fits above the load side bracket, and a counter load side bracket that holds the counter load side (counter fan side) bearing of the rotor. A plurality of protrusions having an inclined upper surface are provided on the outer peripheral surface, and the air guide is fitted to the anti-load side bracket by the protrusions.

The second means is to provide a plurality of protrusions having an inclined upper surface on the inner peripheral surface of the upper end of the anti-load side bracket, and the air guide is fitted to the anti-load side bracket by the protrusions.

A third means is to provide a protrusion on the lower end of the outer periphery of the air guide, and to provide a protrusion-like slope continuous to the slope of the air guide on the upper end of the outer periphery of the anti-load side bracket. It is fitted with.

A fourth means is to provide a first rib projecting from a lower end surface of an inner circumference of the air guide, a second rib to an outer circumference of the anti-load side bracket, and the air guide by the ribs. It is fitted with.

A fifth means is to provide an inverted L-shaped cutout on the outer periphery of the casing, have a projection protruding on the outer surface of the air guide and a recess adjacent to the projection, and fit the casing to the air guide by the cutout and the projection. It is a combination.

[0013]

In the first means of the present invention, a plurality of protrusions having inclined upper surfaces are provided on the outer peripheral surface of the air guide, and the air guide is fitted to the anti-load side bracket by the protrusions. Since the slope can be wide, the ventilation passage can be sufficiently secured, and the performance of the air guide can be improved.

In the second means, a plurality of protrusions whose upper surface is inclined are provided on the inner peripheral surface of the upper end of the anti-load side bracket, and the air guide is fitted to the anti-load side bracket by the protrusions. As a result, the slope of the air guide can be widened, so that the ventilation passage can be sufficiently secured and the performance of the air guide can be improved.

In the third means, a protrusion is provided on the lower end of the outer periphery of the air guide, and a protrusion-shaped slope that is continuous with the slope of the air guide is provided on the upper end of the outer periphery of the anti-load side bracket. Since the air guide is fitted into the air guide, the slope of the air guide can be continuously lengthened, so that the ventilation passage can be sufficiently secured and the performance of the air guide can be improved.

In the fourth means, a first rib projecting from the lower end surface of the inner circumference of the air guide is provided, a second rib is provided on the outer circumference of the anti-load side bracket, and the air guide is provided by the ribs to the anti-load side bracket. Since the press fit surfaces of the air guide and the casing are flat, the air tightness is good and the motor performance can be improved.

In the fifth means, an inverted L-shaped notch is provided on the outer periphery of the casing, and a projection protruding on the outer surface of the air guide and a recess adjacent to the projection are provided, and the casing is fitted into the air guide by the notch and the projection. Since they are fitted together, the assembly can be done simply by twisting the casing into the air guide, and the assembly is easy, and the flat air-tightness between the air guide and the casing provides good airtightness, improving motor performance. is there.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 6, the motor 13 forms an outer shell from the air guide 14, the load side bracket 15 and the anti-load side bracket 16, and the shaft 18 of the rotor 17 projects toward the air guide 14 side, and the fan 19 is located there. Was stuck. A casing 20 covers the front of the fan 19, and an intake port 21 is opened in the center of the casing 20 so as to face the fan 19. The air guide 14 is fixed to the load side bracket 15, and the counter load side bracket 16
Holds the stator 22, and an exhaust port 23 is opened below the stator 22.

Further, a first projection 24 having an inclined upper surface projects from the side surface of the air guide 14, and the air guide 14 and the anti-load side bracket 16 are fitted by the first projection 24.

The operation of the above configuration is as follows.
When the motor 13 is operated, the fan 19 rotates at a high speed with the rotation of the rotor 17 to generate a suction force.
The air sucked from 1 passes through the motor 13, cools the rotor 17 and the stator 22, and is then discharged from the exhaust port 23. Since the first protrusion 24 protruding from the air guide 14 is fitted to the anti-load side bracket 16, a screw for stopping the air guide 14 is not required, the number of parts is reduced, and the number of assembly steps for screw fixing can be reduced. The sex becomes very good. Moreover, since the inclination of the upper surface of the first projection 24 has a width to the outer circumference of the anti-load side bracket 16, the inclined surface of the air guide 14 can take up to the full outer circumference of the anti-load side bracket 16, and the air passage can be provided. Since it can be secured widely, it can handle a large air volume. Therefore, it greatly contributes to the performance improvement of the air guide 14.

In the second embodiment, the anti-load side bracket 1
The second protrusion 25 whose upper surface is inclined protrudes from the side surface of 6,
The air guide 14 and the anti-load side bracket 16 are fitted by the second protrusion 25.

The operation of this embodiment is as follows.
Since the second protrusion 25 protruding from the anti-load side bracket 16 is fitted to the air guide 14, a screw for stopping the air guide 14 is unnecessary, the number of parts is reduced, and the number of assembling steps for screw fixing can be reduced. The sex becomes very good. In addition, the inclination of the upper surface of the second protrusion 25 is such that the air guide 14
In addition to the width of the air flow passage of No. 3, the width of the anti-load side bracket 16 is equal to the thickness of the air guide 14. Since it can be secured widely, it can handle a large air volume.
Therefore, it greatly contributes to the performance improvement of the air guide 14.

In the third embodiment, the anti-load side bracket 16
From the upper end surface of the third projection 26 whose upper surface is inclined,
The air guide 14 and the anti-load side bracket 16 are fitted by the third protrusion 26.

The operation of this embodiment is as follows.
Since the third protrusion 26 protruding from the anti-load side bracket 16 is fitted to the air guide 14, a screw for stopping the air guide 14 is not required, which reduces the number of parts and the number of assembling steps for fixing the screw. The sex becomes very good. In addition, the inclination of the upper surface of the third protrusion 26 is such that the air guide 14
Since a continuous slope is formed, the slope of the air guide 14 can be wide and long up to the outer periphery of the anti-load side bracket 16, and the air passage can be wide and long, so that a large air volume can be accommodated. Therefore, it greatly contributes to the performance improvement of the air guide 14. A hole is formed in the anti-load side bracket 16 immediately below the third protrusion 26, so that an undercut is not taken into consideration in manufacturing a mold for molding. Further, even if a hole is formed, the air guide 14 is fitted directly below the third protrusion 26, so there is no fear of air leakage.

In the fourth embodiment, the first rib 27 protruding from the lower end surface of the inner periphery of the air guide 14 is provided, the second rib 28 is provided on the outer periphery of the anti-load side bracket 16, and the air guide 14 is provided by the ribs. Are fitted to the anti-load side bracket 16.

The operation of this embodiment is as follows.
First rib 2 protruding from the lower end surface of the inner circumference of the air guide 14
Since 7 is fitted to the second rib 28 on the outer circumference of the anti-load side bracket 16, a screw for stopping the air guide 14 is unnecessary, the number of parts is reduced, and the number of assembling steps for screw fixing can be reduced, resulting in easy assembling. Get very good. Further, since the outer shape of the air guide 14 is widened to almost the outer diameter of the motor 13, the fan 19 having a large diameter can be used, which greatly contributes to the improvement of the performance of the motor 13.

In the fifth embodiment, an inverted L-shaped notch 29 is provided on the outer circumference of the casing 20, and a fourth protrusion 30 protruding from the outer surface of the air guide 14 and a recess 31 adjacent to the fourth protrusion 30 are provided. The casing 20 is fitted to the air guide 14 by the notch 29, the fourth protrusion 30, the recess 31, and the section 32 below the notch 29.

The operation of this embodiment is as follows.
An inverted L-shaped notch 29 on the outer periphery of the casing 20 fits with the fourth protrusion 30 on the outer surface of the air guide 14. When the casing 20 is pushed along the notch 29 and the fourth protrusion 30 and twisted, the protrusion fits in the deepest part of the notch 29. Further, the section 32 of the casing 20 is attached to the air guide 14
The casing 20 and the air guide 14 are fitted by being pushed toward the concave portion 31. Once fitted, the segment 32 and the recess 31, and the notch 29 and the fourth protrusion 30 are engaged with each other, so that the casing 20 does not move back and forth or left and right, and a sufficient airtight property is obtained.
It greatly contributes to the performance improvement of No. 3. Further, since the casing 20 and the air guide 14 are fitted to each other only by pushing in and twisting the casing 20, the number of assembling steps can be reduced, and the assembling property becomes very good.

[0030]

As is apparent from the above embodiments, according to the first means of the present invention, the stator and the rotor, the fan that rotates together with the rotor, the casing that covers the upper side of the fan, the lower part of the fan, A load-side bracket that holds the load-side bearing of the rotor, an air guide that fits above the load-side bracket, and an anti-load-side bracket that holds the anti-load-side (anti-fan-side) bearing of the rotor are provided. The outer peripheral surface of the guide is provided with a plurality of slanted projections, and the air guide is fitted to the anti-load side bracket by the projections. It is possible to provide an electric blower which can improve the performance of the air guide, has a small number of parts, is easy to assemble, and has good suction performance.

According to the second means, a plurality of protrusions whose upper surfaces are inclined are provided on the inner peripheral surface of the upper end of the anti-load side bracket, and the air guide is fitted to the anti-load side bracket by the protrusions. Since the slope of the air guide can widen the slope of the air guide, it is possible to sufficiently secure the ventilation passage, improve the performance of the air guide, have a small number of parts, have good assemblability, and provide an electric blower with good suction performance.

According to the third means, a protrusion is provided at the lower end of the outer periphery of the air guide, and a protrusion-shaped slope that is continuous with the slope of the air guide is provided at the upper end of the outer periphery of the anti-load side bracket. Since it is fitted to the side bracket, the slope of the air guide can be taken continuously for a long time, so that a sufficient ventilation passage can be secured and the performance of the air guide can be improved.
It is possible to provide an electric blower that has a small number of parts, is easy to assemble, and has good suction performance.

According to the fourth means, the first rib protruding from the lower end surface of the inner circumference of the air guide is provided, the second rib is provided on the outer circumference of the anti-load side bracket, and the air guide is anti-loaded by the ribs. Since it is fitted to the side bracket, the air-tightness of the air guide and casing is flat, so airtightness is good, motor performance can be improved, assembly is easy with a small number of parts, and suction performance is good. Can be provided.

According to the fifth means, an inverted L-shaped cutout is provided on the outer periphery of the casing, and a projection protruding on the outer surface of the air guide and a recess adjacent to the projection are provided. The cutout and the projection guide the casing to the air guide. Since it is fitted to the air guide, it can be assembled simply by twisting it into the air guide, and the assembly is easy.The flat press-fitting surface of the air guide and the casing provides good airtightness and improves motor performance. Thus, it is possible to provide an electric blower that has a small number of parts, is easy to assemble, and has good suction performance.

[Brief description of drawings]

FIG. 1 is a partial side view showing fitting of an air guide and an anti-load side bracket of an electric blower according to a first embodiment of the present invention.

FIG. 2 is a partial side view showing fitting of an air guide and an anti-load side bracket of an electric blower according to a second embodiment of the present invention.

FIG. 3 is a partial side view showing fitting of an air guide and an anti-load side bracket of an electric blower according to a third embodiment of the present invention.

FIG. 4 is a side sectional view showing an internal structure of an electric blower according to a fourth embodiment of the present invention.

FIG. 5 is a side view showing fitting of a casing of an electric blower and an air guide in a fifth embodiment of the present invention.

FIG. 6 is a partial side view of an air guide of an electric blower according to a fifth embodiment of the present invention.

FIG. 7 is a side sectional view showing the internal structure of a conventional electric blower.

[Explanation of symbols]

 13 motor 14 air guide 15 load side bracket 16 anti-load side bracket 19 fan 20 casing 24 first protrusion 25 second protrusion 26 third protrusion 27 first rib 28 second rib 29 notch 30 fourth Protrusion 31 Recess 32 Segment

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshitaka Murata 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Takafumi Ishibashi 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A stator, a rotor, a fan that rotates together with the rotor, a casing that covers the upper side of the fan, a load side bracket that is provided below the fan and that holds a load side bearing of the rotor, and a load side bracket. An air guide fitted upward and an anti-load side bracket for holding a bearing on the anti-load side (anti-fan side) of the rotor are provided, and a plurality of protrusions whose upper surface is inclined are provided on the outer peripheral surface of the air guide. An electric blower in which the air guide is fitted to the anti-load side bracket by the protrusion. 2. The electric blower according to claim 1, wherein a plurality of projections whose upper surfaces are inclined are provided on the inner peripheral surface of the upper end of the anti-load side bracket, and the air guide is fitted to the anti-load side bracket by the projections. 3. A protrusion is provided on the lower end of the outer periphery of the air guide, and a protrusion-shaped slope that is continuous with the slope of the air guide is provided on the upper end of the outer periphery of the anti-load side bracket, and the air guide is fitted to the anti-load side bracket by the protrusion. The electric blower according to claim 1, wherein 4. A first rib protruding from the lower end surface of the inner circumference of the air guide is provided, a second rib is provided on the outer circumference of the anti-load side bracket, and the air guide is fitted to the anti-load side bracket by the ribs. The electric blower according to claim 1, wherein 5. A casing having an inverted L-shaped cutout on the outer periphery of the casing, having a protrusion protruding on the outer surface of the air guide and a recess adjacent to the protrusion, and fitting the casing to the air guide by the notch and the protrusion. The electric blower according to claim 4.