JPS5843089B2 - Dendo Soufuki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric blower used in a vacuum cleaner or the like.

Conventionally, in a vacuum cleaner, a cord reel for winding a power cord is built into a main body case along with an electric blower.

The electric blower and cord reel are aligned directly in the axial direction.
Since the casing is provided with a cylindrical shaft, the length in the axial direction becomes extremely large, and the main body case cannot be made compact.

In addition, since heat is generated in the cord reel, it must be cooled, but since the cord reel and the electric blower are a certain distance apart, it is difficult to perform forced cooling, and a certain amount of air guidance is required. Even in cases where the airflow is forced by forming a path, the exhaust air must be used for efficiency reasons.The temperature of such exhaust air increases considerably as it passes through the motorized parts, so its cooling effect is low. be.

The present invention has been made in view of the above points, and an object of the present invention is to obtain an electric blower that can be miniaturized as a whole even if a cord reel is provided, and can also effectively cool the cord reel portion. It is something.

The present invention provides an electric blower main body in which an air path is formed by an electric part with a small diameter and an air blower part with a large diameter, and in which an air passage through which air flows from the electric part to the air blower is formed. A cord reel is disposed on the outer periphery of the part, and the cord reel is rotatably attached to the electric blower main body,
The present invention is characterized in that the cord reel is disposed on the windward side of the electric part in the air passage.

Therefore, since the cord reel is placed around the outer periphery of the electric blower, which consists of a blower part and an electric part, the two parts are placed very close together, so the wind generated in the blower part is transferred to the electric part. At the same time, the cord reel on the windward side is effectively cooled by the wind before passing through the motorized part, and as a result, each part is effectively cooled and local parts are cooled. In addition, even if a cord reel is provided, the axial length does not increase at all, and as a result, it can be made extremely compact. .

A first embodiment of the present invention will be described based on FIG.

1 is an electric blower main body, and this electric blower main body 1 consists of a relatively small-diameter electric part 2 and a large-diameter blower part 3.

An axle box 6 for holding a bearing 5 is provided at one end of the frame 4 of the motorized part 2, and a holding part 9 for holding a bearing 8 is also provided on the splitting frame 7 connected to the open end of the frame 4. It is well-formed.

This partition frame 7 and the frame 4 have ventilation holes 10 and 1.
A cover 12 is provided on the supporting frame 7, and an exhaust hole 13 is formed in the cover 12.

The shaft 16 of the rotor 15 facing the stator 14 fixed to the frame 4 is attached to the bearings 5 and 8.
is held, and a commutator 16 is attached to this shaft 16.

Further, a brush holder 18 is fixed to the frame 4, and the brush holder 18 is provided with a commutator brush 19 that is pressed against the commutator 16 and a current collector brush 20 that is perpendicular to the commutator brush 19. It is being

Furthermore, a fan 21 is fixed to the end of the shaft 16 so as to be located inside the cover 12.

A shaft body 22 is fixed to the outer peripheral portion of the axle box 6, and a cord reel 23 is rotatably attached to this shaft body 22.

That is, the cord reel 23 consists of a reel part 24 that covers the outer periphery of the electric part 1 and a support wall 26 connected to the reel part 24 by ribs 25, and a ventilation passage 27 is formed between the ribs 25. At the same time, a ring-shaped sliding contact 28 is provided on the inner surface of the support wall 26, and the current collector brush 20 is pressed into contact with the ring-shaped sliding contact 28.

Further, a plurality of through holes 29 are formed in the reel portion 24 as well.

Note that 30 is a power cord.

Next, a mainspring shaft 31 is fixed to the shaft body 22,
One end of a mainspring spring 32 is fixed to the mainspring shaft 31, and the other end of the mainspring spring 32 is fixed to the cord reel 23.

Further, reference numeral 33 denotes a presser for preventing the cord reel 23 from swinging, and the presser 33 has a ventilation hole 34 formed therein.

In such a configuration, when the electric part 2 is started, the fan 21 is driven and an air flow as shown by the arrow is generated.

That is, air that has entered the motorized part 2 through the ventilation path 27 and the ventilation hole 11 is exhausted through the ventilation hole 10 and the exhaust hole 13.

At this time, outside air is also sucked through the through hole 29 and the ventilation hole 34, and the reel part 24 of the cord reel 23 and the power cord 3
0 to suppress the temperature rise in this part.

Then, the motorized section 2 is cooled down, and each section is cooled very effectively.

Moreover, since the cord reel 23 covers the outer periphery of the electric part 2, its length in the axial direction may be short, and the cord reel 23 is formed to be extremely compact.

Next, a second embodiment of the present invention will be described based on FIG.

The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted.

First, a protrusion 35 that protrudes forward in the center of the cover 12
A cord reel 23 is rotatably attached to.

Then, a ventilation hole 36 is formed in the center side of the cover 12,
A ventilation hole 37 is formed on the outer peripheral side of the support wall 26 of the cord reel 23.

Further, a mainspring shaft 38 is fixed to the protrusion 35,
One end of a mainspring spring 39 is fixed to the mainspring shaft 38, and the other end of the mainspring spring 39 is fixed to a case 40 fixed to the supporting wall 26.

In such a configuration, the fan 21 driven by the electric part 2 generates wind in the opposite direction to that in the above embodiment, and the cord reel 23 is first cooled by the wind passing through the ventilation holes 37 and 36, and then the electric part 2 is cooled.

Therefore, the cord reel 23 is cooled by the cold air, and is effectively cooled.

As described above, the present invention provides a cord reel disposed around the outer periphery of the electric blower body, and this cord reel is pivoted to the electric blower body, and the cord is placed upwind of the electric part of the wind generated in the blower part. Because the reel is positioned, the cord reel and power cord can be cooled by cold air, suppressing local temperature rises, and even with the cord reel installed, the overall length of the electric blower body can be extended. This has the advantage that it can be formed extremely compact.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing a first embodiment of the invention, and FIG. 2 is a partially cutaway side view showing a second embodiment of the invention. 1...Electric blower body, 2...Electric part, 3...Blower part, 23...Cord reel.

Claims (1)

[Claims] 1. An electric blower main body is provided with an air passage formed by a small-diameter electric part and a large-diameter blower part, through which air flows from the electric part to the blower part, and the outer periphery of the electric part of the electric blower main body is An electric blower, characterized in that a cord reel is disposed, the cord reel is rotatably attached to the electric blower body, and the cord reel is disposed on the windward side of the electric part of the air passage.