JPH0142205B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a suction port body for a vacuum cleaner.

BACKGROUND ART Conventionally, as shown in FIG. 1, there has been a suction port body that rotates a turbine A using suction airflow and drives a rotating brush B by the turbine A to clean a floor surface.

Furthermore, as described in Japanese Patent Publication No. 46-23195, there is also a turbine in which the turbine is divided into two parts and the position of the blades is shifted between the left and right sides.

Problems to be Solved by the Invention The ventilation passage C that narrows and blows the intake airflow to the turbine A necessarily has a small air passage area. The wind that blows from the ventilation path C to the blades D of the turbine A is the blade D.
The wind that is deflected as shown in path E due to the resistance of In addition, when high-speed wind collides with blade D, high-frequency sound is generated, and the noise level is high and measured at a position 1 m above the suction port body.
It reaches as high as 81 hon. The sound quality is also in the high frequency range, making it an unpleasant noise that cannot be heard. Turbine room F
The air passages inside will also become narrower, reducing the ability to suck up dust.

In addition, in the method described in Japanese Patent Publication No. 46-23195, although it has the effect of reducing noise, there is no change in the area of the ventilation passage, and the dust absorption effect cannot be improved. There is a problem in that dirt and the like can easily get caught in it.

Means for Solving the Problems The invention as set forth in claim 1 provides a main body that runs on the floor, a brush chamber with an opening at the bottom that accommodates a rotating brush, and a turbine that accommodates a turbine that drives the rotating brush. A connecting pipe is provided to form a chamber and connect the turbine chamber to a dust collecting section of the vacuum cleaner, and the turbine is disposed opposite to a ventilation passage communicating the brush chamber and the turbine chamber. A concave ventilation hole opening in the outer circumferential direction is formed by cutting out a part of each blade of the turbine in a concave shape and continuously extending along the rotation direction.

In the invention described in claim 2, the blade is inclined toward the downstream side of the intake airflow from the ventilation port as it goes toward the opening edge of the ventilation port.

The invention as set forth in claim 3 is such that a brush chamber with an opening at the bottom for storing a rotating brush and two opposing rotating bodies for driving the rotating brush are coaxially coupled to a main body that runs on a floor surface. A connecting pipe is provided to form a turbine chamber for accommodating a turbine and to connect the turbine chamber to a dust collection section of a vacuum cleaner, and the turbine faces a ventilation passage communicating the brush chamber and the turbine chamber. A part of each blade of the turbine is cut out in a concave shape, and a concave ventilation hole opening in the direction of the outer circumference is continuously formed along the rotational direction. It is located at the boundary between the two rotating bodies.

Effect In the invention described in claim 1,
The suction airflow is constricted by the ventilation passage and blown against the turbine, but by forming ventilation holes in the blades of the turbine, it is possible to improve the dust suction effect when the area of the air passage becomes large. In addition, the suction airflow is allowed to flow without being bent, thereby preventing the generation of vortices and reducing the noise level, as well as reducing noise in the high frequency range due to collisions with the blades.

In the invention described in claim 2,
By inclining the blades toward the opening edge of the ventilation hole, the wind passing through the turbine from the ventilation path is rectified, thereby further reducing noise.

In the invention described in claim 3,
By forming a turbine by coaxially coupling two rotating bodies, the rotating bodies can be molded using a mold with a simple split structure that is simply divided in the axial direction. In addition, short blades are formed on the outer periphery of the turbine shaft facing the bottom of the ventilation hole, which prevents hair, lint, etc. from getting tangled in the turbine shaft, and also prevents the two rotating bodies from getting tangled. By connecting them at a position away from the ventilation opening, it is constructed so that dust is less likely to accumulate on the connecting surface.

Embodiment of the Invention A first embodiment of the invention will be described with reference to FIGS. 2 to 7. Reference numeral 1 denotes a main body, and this main body 1 is constructed by assembling an upper case 2 and a lower case 3, and when assembled, a bumper 4 and a connecting pipe 5 connected to a vacuum cleaner are sandwiched. FIG. 3 shows the inside of the main body 1 with the upper case 2 removed. The main body 1 is divided into a brush chamber 6, a turbine chamber 7, and a transmission chamber 8 which are open at the bottom. A brush 9 is rotatably housed in the turbine chamber 7, and a turbine 10 is rotatably housed in the turbine chamber 7.
The shaft portion 11 of 0 and the rotating brush 9 are connected by a belt 12. In addition, a ventilation passage 14 is provided in the partition plate 13 inserted between the turbine chamber 7 and the brush chamber 6.
is formed.

The turbine 10 is formed by coaxially coupling two rotating bodies 15 and 16, and these rotating bodies 15 and 1
6 has a hollow shaft portion 11, a plurality of blades 17, and a flange 18. And the rotating body 15,
Bolt 2 passed through shaft portion 11 of 16 and pulley 19
By screwing the nut 21 into the rotating body 1
5 and 16 are connected. Thus, the blade 17 has a concave ventilation hole 22 formed from its outer periphery. The radial lengths of these ventilation holes 22 are shorter than the radial lengths of the blades 17, so the blades 17 are formed on the outer periphery of the shaft portion 11 facing the bottoms of the ventilation holes 22. moreover,
The coupling surfaces 23 of the rotating bodies 15 and 16 are positioned in a plane away from the ventilation openings 22. 24 is the shaft part 1
This bearing 24 holds the upper case 2.
and the lower case 3 to be clamped and fixed.

Next, a frame body 26 having brush bristles 25 is fixed to the lower case 3.

In such a configuration, the connecting tube 5 is connected to a vacuum cleaner via an extension tube or a suction hose, and cleaning is performed by grasping the extension tube and sliding the main body 1 along the floor surface. The wind sucked in from the lower surface of the brush chamber 6 is throttled by the ventilation passage 14 and drives the turbine 10, thereby causing the rotating brush 9 to rotate. At this time, the wind whose flow velocity has been increased in the ventilation passage 14 is transferred to the turbine 10
However, since the ventilation holes 22 are formed in the blades 17, the air passage area of the turbine chamber 7 becomes wider and the resistance of the blades 17 is also reduced. Ventilation port 2
2 is located on the straight line connecting the ventilation path 14 and the opening surface of the connecting pipe 15, so that the rectification effect is even better. This allows the wind to flow smoothly, suppressing the noise caused by eddy currents, and reducing wind noise.
Sound in the high frequency range due to the wind being blocked by the blades 17 is also reduced, and not only the noise level is reduced, but also the sound that is difficult to hear is also reduced. Incidentally, FIG. 9 shows a noise frequency analysis curve according to the conventional method, and FIG. 10 shows a noise frequency analysis curve according to the present embodiment of the present invention.
Comparing the two, the highest level of the conventional system is 81 phons, while that of this embodiment is 72 phons. Also, if you compare the high-frequency parts of the graph, you can see that the level of the high-frequency range has decreased. In other words, the metallic sound becomes smaller, and the feeling of being difficult to hear is sufficiently alleviated. The noise measurement position was 1 m above the main body 1. Also, turbine 1
Since the narrowing of the air passage caused by 0 is eliminated by the formation of the ventilation hole 22, a sufficient suction air volume (1.8 m ³ /min. in this example) is ensured, and dust can be efficiently sucked. .

Furthermore, since the blade 17 is formed around the shaft portion 11 in the area of the ventilation opening 22, thread waste, hair, etc. will not become entangled with the shaft portion 11 in this portion. Further, since the joining surface 23 of the two rotating bodies 15 and 16 is also located in a plane away from the ventilation hole 22, dust does not accumulate on this joining surface 23.

Furthermore, although the turbine 10 requires ventilation holes 22 in the blades 17, the turbine 10 is formed by connecting two rotating bodies 15 and 16, and by forming the ventilation holes 22 at the boundary of this joint, it is possible to The rotating body 1 is manufactured by a mold with a simple mold structure that opens and closes only when
5, 16 can be molded.

Next, a second embodiment of the present invention will be explained based on FIG. Components that are the same as those in the previous embodiment are designated by the same reference numerals and explanations will be omitted. In this embodiment, the blades 17 of the turbine 10 are inclined along the intake airflow from the ventilation passage 14 toward the opening edge of the ventilation port 22. This inclined surface 27 may be in a straight or curved state. Therefore, the rectifying effect of the wind passing through the turbine chamber 7 is greatly improved, and the generation of vortices is prevented. As a result, the maximum noise level has been reduced to 71 phons as shown in Figure 11, and as you can see from the high frequency area, the level of high frequency areas has also been effectively reduced compared to the conventional one shown in Figure 9. Go down.

Effects of the Invention The invention described in claim 1 forms a brush chamber with an opening at the bottom that accommodates a rotating brush and a turbine chamber that accommodates a turbine that drives the rotating brush in a main body that runs on a floor surface. At the same time, a connecting pipe is provided to connect the turbine chamber to the dust collection section of the vacuum cleaner, and the turbine is disposed opposite to a ventilation passage that communicates the brush chamber and the turbine chamber, and the turbine chamber is provided with a connecting pipe that connects the turbine chamber to the dust collecting section of the vacuum cleaner. A concave ventilation hole opening into the turbine is cut out in a part of each blade of the turbine and is continuously formed along the rotational direction. By forming ventilation holes in the blades, the air passage area can be increased to improve dust absorption, and the suction airflow can be circulated without being bent, thereby preventing the generation of eddy currents and reducing the noise level. In addition, it is possible to reduce noise in the high frequency range due to collisions with the blade.

The invention described in claim 2 rectifies the wind passing through the turbine from the ventilation path by making the blades incline toward the opening edge of the ventilation hole, thereby further reducing noise. It is possible.

In addition, the invention described in claim 3 provides a mold with a simple split structure in which the rotor is simply divided in the axial direction by combining two rotors on the same axis to form a turbine. In addition, a short blade is formed on the outer periphery of the turbine shaft facing the bottom of the ventilation hole, which prevents hair, lint, etc. from getting entangled in the turbine shaft. Furthermore, by joining the two rotating bodies at a position away from the ventilation opening, it is possible to prevent dust from accumulating on the joining surface.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view showing a conventional example, Fig. 2 is a perspective view showing a first embodiment of the present invention, Fig. 3 is a plan view showing the inside of the main body, and Fig. 4 is a longitudinal sectional side view thereof. , FIG. 5 is a front view of the turbine, FIG. 6 is a longitudinal sectional front view of the turbine, FIG. 7 is a longitudinal sectional side view of the portion marked with - in FIG. 6, and FIG. 8 is a second embodiment of the invention. A front view of a turbine showing an example, FIGS. 9 to 11 show noise frequency analysis curves, FIG. 9 is according to the conventional example, FIG. 10 is according to the first embodiment of the present invention, and FIG. is according to the second embodiment of this invention. 1...Main body, 5...Connecting pipe, 6...Brush chamber,
7... Turbine chamber, 9... Rotating brush, 10...
Turbine, 11... Shaft, 14... Ventilation duct, 1
5, 16... Rotating body, 17... Blade, 22...
...ventilation port, 23...bonding surface.

Claims (1)

[Scope of Claims] 1. A brush chamber with an opening at the bottom that accommodates a rotating brush and a turbine chamber that accommodates a turbine that drives the rotating brush are formed in a main body that runs on the floor, and this turbine chamber is used as a vacuum cleaner. A connecting pipe is provided to connect to a dust collecting section of the turbine, and the turbine is disposed opposite to a ventilation passage that communicates the brush chamber and the turbine chamber, and has a concave ventilation opening opening in the outer circumferential direction on its outer periphery. A suction port body for a vacuum cleaner, characterized in that a part of each blade of the turbine is cut out in a concave shape and continuously formed along the rotation direction. 2 A brush chamber with an opening at the bottom for storing a rotating brush and a turbine chamber for storing a turbine for driving the rotating brush are formed in the main body that runs on the floor, and this turbine chamber is connected to the dust collection part of the vacuum cleaner. The turbine is provided with a concave ventilation hole that is disposed opposite to a ventilation passage that communicates the brush chamber and the turbine chamber and that opens in the outer circumferential direction on the outer periphery of each blade of the turbine. A part of the blade is continuously formed in a concave shape along the direction of rotation, and the blade is inclined toward the downstream side of the intake airflow from the ventilation passage as it approaches the opening edge of the ventilation hole. The suction port of a vacuum cleaner. 3. A main body that runs on the floor is formed with a brush chamber with an opening at the bottom that accommodates a rotating brush and a turbine chamber that accommodates a turbine in which two opposing rotating bodies that drive the rotating brush are coaxially connected. A connecting pipe is provided to connect the turbine chamber to the dust collecting section of the vacuum cleaner, and the turbine is disposed opposite to a ventilation passage communicating the brush chamber and the turbine chamber, and the turbine is disposed on the outer periphery thereof in the outer circumferential direction. A concave ventilation hole that opens is formed by cutting a part of each blade of the turbine into a concave shape and continuously forming the concave ventilation hole along the rotational direction, and the concave ventilation hole is located at the boundary between the two rotating bodies. A suction port body for a vacuum cleaner characterized by: 4. The suction port body for a vacuum cleaner according to claim 3, wherein a radially short blade is formed at the bottom of the concave ventilation port on the outer periphery of the shaft of the turbine. 5. The suction port body of a vacuum cleaner according to claim 3 or 4, characterized in that the coaxial joining surface of the two rotating bodies is located in a plane that deviates laterally from the ventilation port. .