JPH0984727A - Suction tool for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction tool for a vacuum cleaner having little rotational vibrations and little noises and excellent in productivity by improving the assembling accuracy of the section of a rotary brush. SOLUTION: A rotary brush is provided with a cylindrical rotary shaft body 2 and dust raking blades 3 outwardly protrusively coupled with a belt-like coupling section formed on the outer periphery of the rotary shaft body 2. Shaft support tools 12 are coupled with both end faces of the cylindrical rotary shaft body 2 respectively, a shaft 4 is pressed into the shaft support tools 12, and the shaft 4 is brought into contact with the rotary shaft body 2. The machining of pin holes is not required for pressing the shaft 4 into both end faces of the rotary shaft body 2, the occurrence of rotational vibrations and noises caused by the assembling displacement (eccentricity) of the shaft 4 is prevented, and no uncomfortableness is given to a user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction tool for an electric vacuum cleaner having a rotating brush.

[0002]

2. Description of the Related Art FIG. 5 is a side view of a rotary brush of a suction tool of a conventional vacuum cleaner. In the figure, reference numeral 2 denotes a cylindrical rotary shaft body having a plurality of blade mounting fitting portions 2a integrally formed on the outer peripheral portion thereof. 3 is the fitting portion 3a in the fitting portion 2a
Blades 4 which are fitted to and protrude outward from the fitting portion 2a,
Is a shaft, and these members form the rotary brush 1.

The shaft cores on both end surfaces of the rotary shaft body 2, that is, both end surfaces of the cylindrical rotary shaft body 2 are used as the rotary shaft surfaces, and the shaft core portion at the center thereof is as shown in FIG. A pin hole 2b having a predetermined depth is formed, and the shaft 4 is press-fitted into the pin hole 2b and attached to the rotary shaft body 2 in an integrated state.

The rotary brush 1 having the above structure is shown in FIG.
As shown in FIG. 3, the electric motor 9 is arranged at the suction port 6 of the suction tool body 5, the shaft 4 is attached to the suction tool body 5 via the bearing 7, and is connected via the transmission belt 8.
It rotates freely and is cleaned.

Further, in the conventional electric vacuum cleaner disclosed in Japanese Patent Publication No. 6-85752, in order to prevent the shaft 4 from coming out of the pin hole 2b of the rotary shaft body 2, the rotary shaft body 2 is made of aluminum. Some are formed by extrusion molding.

[0006]

In the conventional vacuum cleaner suction tool as described above, the pin hole 2 into which the shaft 4 is press-fitted is inserted.
When processing b into the shaft core of both end surfaces of the rotary shaft 2, the pin hole 2
There is a problem in that it is difficult to align b, and when displacement (eccentricity) occurs, the rotational vibration of the rotary brush 1 causes noise and vibration of the entire suction tool, which is uncomfortable for the user.

Further, when the rotary shaft body 2 is formed by extrusion molding made of aluminum, the frictional heat generated by the rotary friction generated between the shaft 4 and the bearing 8 which supports the shaft 4 is applied to the aluminum rotary shaft body 2. Since the blade 3 that is transmitted and fitted to the rotary shaft body 2 is usually made of rubber, there is a problem that thermal deterioration is promoted and the service life is adversely affected by rotational wear and the like.

The present invention has been made in order to solve the above-mentioned problems, and eliminates the need for alignment of the pin holes of the shaft, noise due to rotational vibration caused by the displacement of the pin holes, and the suction device as a whole. The result is a vibration-free, comfortable and comfortable vacuum cleaner.

Another object of the present invention is to provide an electric vacuum cleaner which does not affect the deterioration or life of the blade due to the rotational friction generated between the shaft and the bearing.

[0010]

SUMMARY OF THE INVENTION A suction tool for an electric vacuum cleaner according to the present invention has a rotary shaft body integrally having a single or a plurality of blade fitting portions on an outer peripheral portion and a fitting state in the fitting portion. In a suction tool of an electric vacuum cleaner including a rotating brush having a blade attached to a rotary shaft and a rotating shaft of the rotating shaft, the shaft is brought into contact with both end surface shaft core portions of the rotating shaft body to be integrated. It has been installed in place.

Further, there are provided a rotating shaft body integrally having a single or a plurality of blade fitting portions on an outer peripheral portion thereof, a blade fitted to the fitting portion in a fitted state, and a rotating shaft of the rotating shaft body. In a suction tool of an electric vacuum cleaner including a rotating brush having the shaft, the shaft is brought into contact with the shaft cores of both end surfaces of the rotating shaft to be integrally attached thereto, and the shaft is fitted to the rotating shaft as the attaching means. In addition, a shaft support through which the shaft is press-fitted is used.

Further, the rotating shaft body is formed of an extruded material made of aluminum, and a gap is provided at a contact portion between the shaft and an end face shaft core portion of the rotating shaft body.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. FIG. 1 is a side sectional view of a suction device 5 of the present invention connected to a vacuum cleaner body via a vent portion 10. In the figure, 1 is a rotary brush, 2 is a cylindrical rotary shaft having a fitting portion 2a of a blade 3, 3 is a blade for scraping out dust, 6 is a suction port provided in front of the suction tool 5, and 11 is It is a bottom cover.

As shown in the figure, the suction tool body 5 is flat, and a suction port 6 is provided in front of the bottom cover 11 that opposes the cleaning surface (floor surface). The rotary brush 1 is provided inside the suction port 6 horizontally and rotatably with respect to the cleaning surface. The rotary shaft body 2 is formed of an extruded material made of aluminum, and has a fitting portion 2a.
Are cylindrical and extend in the longitudinal direction, and each has a narrow entrance and a wide interior, and is formed over the entire length in the longitudinal direction.
A rotary blade 1 is formed by inserting a thin blade 3 made of rubber or soft resin and protruding outward into the inside of a.

The rotation of the rotary brush 1 is performed by rotating the electric motor 9 and the rotary brush 1 as shown in the upper sectional view of the suction tool 5 in FIG.
The transmission belt 8 is stretched between the
The shaft support 12 with gears having trapezoidal cross-section teeth at one end of the shaft support 12 is fitted to each other with detents or is adhesively fitted to the shaft support 12 by using an adhesive or the like. An auxiliary drive wheel 13 is fitted to assist the forward movement of the suction tool. The shaft support 14 is similarly fitted to the other end of the rotary shaft 2, and the auxiliary drive wheel 15 is also fitted to the shaft support 14.

Further, both ends of the rotary shaft 2 are axial core parts, that is, both end faces of the cylindrical rotary shaft 2 are the rotary shaft surfaces, and the central part of the shaft core part is an enlarged top sectional main part of FIG. As shown in the figure, the steel shaft 4 is attached to the shaft support 12
The shaft 4 is brought into contact with the rotary shaft body 2 by press-fitting and penetrating through the shafts 4 and 14. The shaft 4 abutting on the rotary shaft 2 is supported by a bearing 7, and a bearing cover 17 into which the bearing 7 is press-fitted is supported by a support rib 18 provided on the bottom cover 11.

Next, the operation will be described. When a switch (not shown) is turned on when cleaning the floor surface, the rotary brush 1 presses the shaft support 12 fitted to the rotary shaft body 2 into the shaft support 12 and penetrates the shaft 4 that contacts the rotary shaft body 2. Is driven to rotate by the electric motor 9. Then, the blade 3 provided on the rotating shaft body 2 scrapes the inside of the floor surface (for example, a carpet or the like) and sucks dust from the suction port 6 into the cleaner body.

Embodiment 2. Further, since the rotating shaft body 2 is formed of an extruded material made of aluminum,
As shown in FIG. 3, rotation of the rotary brush 1 generated between the steel shaft 4 and the bearing 7 is caused by providing a gap 20 at the contact portion between the rotary shaft body 2 and the steel shaft 4 and bringing them into contact with each other. It blocks the frictional heat from being transmitted to the rotating shaft 2 made of aluminum.

Further, in the clearance 20, the shaft support members 12 and 14 are fitted to both ends of the rotary shaft body 2 so as to fit into the rotary shaft body 2.
When the shaft support 12 and the shaft 4 are securely contacted with each other, scraps generated when the shaft support tools 12 and 14 are fitted and extra adhesive are provided between the rotary shaft body 2 and the shaft 4.
It can also be stored without affecting other parts.

[0020]

The present invention is configured as described above, and has a structure in which the shaft is in contact with the rotary shaft body, so that it is not necessary to form a pin hole for press-fitting the shaft in the rotary shaft body, Position adjustment during drilling is eliminated, rotational vibration and noise are not generated due to displacement (eccentricity) on the shaft assembly, and the user does not feel uncomfortable.

Further, by providing a shaft support as means for bringing the shaft into contact with the rotary shaft, the shaft and rotary shaft can be reliably brought into contact with each other without providing a pin hole, and the coupling accuracy is impaired. You can assemble without processing.

Further, by providing a gap between the shaft and the rotating shaft to bring them into contact with each other, friction heat generated by aluminum due to rotational friction generated between the shaft made of steel and the bearing supporting the shaft is made of aluminum. The transmission to the rotary shaft body can be blocked by the gap, the thermal deterioration of the rubber blade fitted to the rotary shaft body can be prevented from being promoted, and the life of the blade due to the rotational wear is not adversely affected.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a suction tool of an electric vacuum cleaner according to the present invention.

FIG. 2 is a cross-sectional top view showing the suction tool of the electric vacuum cleaner of the present invention.

FIG. 3 is a cross-sectional top view of essential parts showing a suction tool of the electric vacuum cleaner of the present invention.

FIG. 4 is a cross-sectional top view of essential parts showing a suction tool of the electric vacuum cleaner of the present invention.

FIG. 5 is a side view of a rotary brush showing a suction tool of a conventional electric vacuum cleaner.

FIG. 6 is a perspective view of a rotating brush showing a suction tool of a conventional vacuum cleaner.

FIG. 7 is a front view of a suction port showing a suction tool of a conventional electric vacuum cleaner.

[Explanation of symbols]

1 rotating brush, 2 rotating shaft body, 2a fitting part, 2b
Pin hole, 3 blade, 4 shaft, 5 suction tool body, 6 suction port, 7 bearing, 8 transmission belt, 9 transmission, 10 vent, 11 bottom cover, 12 shaft support tool, 13 auxiliary drive wheel, 14 shaft support tool 1
5 auxiliary drive wheels, 16 bearing covers, 17 support ribs, 20 gaps.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takehiro Yamaguchi 1728 Koeda, Oaza-gun, Hanazono-cho, Osato-gun, Saitama Mitsubishi Electric Home Equipment Co., Ltd.

Claims (3)

[Claims] 1. A rotating shaft body integrally having a single or a plurality of blade fitting portions on its outer peripheral portion, a blade attached to the fitting portion in a fitted state, and a rotating shaft of the rotating shaft body. A suction tool for an electric vacuum cleaner, comprising the rotating brush, wherein the shaft is abutted against the shaft core portions of both end surfaces of the rotary shaft body to be integrally attached thereto. 2. A rotary shaft body integrally having a single or a plurality of blade fitting portions on an outer peripheral portion thereof, a blade attached to the fitting portion in a fitted state, and a rotating shaft of the rotary shaft body. In a suction tool of an electric vacuum cleaner including a rotating brush having the shaft, the shaft is brought into contact with the shaft cores of both end surfaces of the rotating shaft to be integrally attached thereto, and the shaft is fitted to the rotating shaft as the attaching means. A suction tool for an electric vacuum cleaner, comprising a shaft support tool through which the shaft is press-fitted and penetrated. 3. The rotary shaft body is formed of an extruded material made of aluminum, and a gap is provided at a contact portion between the shaft and an end face shaft core portion of the rotary shaft body. The suction tool of the vacuum cleaner described in 2.