JP2000308607A - Floor brush of vacuum cleaner, and vacuum cleaner using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor brush for vacuum cleaner low in a noise generated from a rotary brush rotated by a motor and a vacuum cleaner using the floor brush. SOLUTION: A rotary brush 19 is rotatably installed inside a floor brush body 18 opposite to a suction port 27 opened in a lower surface of the floor brush body 18. The rotary brush 19 comprises a motor 30 to drive the rotary brush 19, a reduction gear 31 to reduce the number of rotation of the motor 30, and a gear 32 to transmit the output from the reduction gear 31 to a brush holder 28 inside the substantially cylindrical brush holder 28 provided with a plurality of brushes 29 on its outer circumferential surface, and the brush holder 28 and the gear 32 are connected to each other by interposing a cushioning material 47 therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for a vacuum cleaner having a rotary brush rotated by an electric motor, and a vacuum cleaner to which the suction device for the vacuum cleaner is connected.

[0002]

2. Description of the Related Art Conventionally, this type of suction device for a vacuum cleaner has
It was configured as shown in FIG. Hereinafter, the configuration will be described.

[0003] As shown in the figure, a suction tool main body 1 includes a rotating brush 2 for releasing dust adhering to a surface to be cleaned such as a carpet.
, A suction port is provided on the bottom surface, and a connection pipe 3 communicating with a cleaner body (not shown) is rotatably provided at a rear portion. The bristle 4 is implanted on the outer peripheral surface of the rotating brush 2,
An electric motor 5 which is a driving source of the rotating brush 2, a planetary gear 6 mounted on the shaft of the electric motor 5, and reduces the rotation and transmits the rotation to the rotating brush 2, and is arranged between the electric motor 5 and the planetary gear 6. And a supporting member 7 provided therein.

The supporting member 7 is fixed to the electric motor 5 by a plurality of screws 8, and a groove 9 is formed on an end face of the supporting member 7, which is in contact with the electric motor 5, to improve ventilation from cooling holes provided in the electric motor 5 to improve heat radiation. The other end face is fitted to the inner ring 10 of the planetary gear 6 and covers the surface of the planetary gear 6. In addition, a key groove (not shown) is provided on the inner peripheral surface of the rotating brush 2, and a convex portion (not shown) projecting from the outer ring of the planetary gear 6 is fitted into the key groove, and a concave portion is formed. The cooling air flow path is formed in the axial direction. A lid 12 having a bearing 11 is attached to the opening at both ends of the rotating brush 2.

[0005] The fixed shaft 13 is formed in a hollow shape, one end of which is protruded to the side of the rotary brush 2, rotatably supports the rotary brush 2 via a bearing 11, and a lead wire connected to the electric motor 5 has a hollow portion. The other end is formed in a cylindrical shape and disposed inside the rotating brush 2 to support the outer periphery of the electric motor 5. The fixed covers 14 are attached to both ends of the rotating brush 2 to prevent dust from entering the rotating brush 2 and the bearing 11.

The rotary brush 2 is supported by the suction tool main body 1 via the fixed cover 14 and the fixed shaft 13, and substantially at the center of the rotary brush 2 opposed to the intake port 15 of the connection pipe 3, the rotary brush 2 is provided. Are formed with a plurality of ventilation holes 16 that communicate the inside and the outside. The leak hole 17 allows the outside air for cooling the electric motor to communicate with the inside of the rotating brush 2 through the hollow portion of the fixed shaft 13, and is formed on the side surface of the suction tool main body 1.

The operation of the above construction will be described. When the main body 1 and the main body of the cleaner are energized, the electric motor 5 rotates.
The rotating torque is increased while being reduced by the planetary gear 6 and transmitted to the rotating brush 2 so that the brush bristles 4 scrape out dust attached to the carpet or the like, and the scraped-out dust is sucked into the cleaner body. At this time, what is rotated by the electric motor 5 is the planetary gear 6, the rotating brush 2 and the lid 1.
The motor 5, the fixed shaft 13, the fixed cover 14, and the lead wires are fixed and held to the suction tool main body 1 only by the outer ring 2 and the bearing 11.

When the cleaner body is operated, a negative pressure is applied to a space surrounded by the suction tool body 1 and the floor, and outside air flows in from the outer periphery of the suction tool body 1 so that the suction port 15 of the connection pipe 3 is opened.
, And the dust on the floor is also sucked into the air inlet 15 by this air flow.

At this time, since a negative pressure also acts on the vicinity of the ventilation hole 16 inside the rotary brush 2 through the ventilation hole 16 provided opposite to the suction port 15, the suction tool is inserted through the hollow fixed shaft 13 and the leakage hole 17. A pressure difference is generated between the outside of the main body 1 and a side portion of the rotating brush 2 that is communicated with the outside, and the outside air flows into the inside of the rotating brush 2 through the hollow portion of the fixed shaft 13 through the leak hole 17 and rotates. A recess 2a provided around the electric motor 5 of the brush 2
, And flows toward the air hole 16, and flows out from the air hole 16 toward the air inlet 15 having a lower pressure than the inside of the rotating brush 2.

[0010]

In such a conventional structure, the planetary gear 6 is mounted on the shaft of the electric motor 5 to reduce the rotation of the electric motor 5 and to rotate the protruding portion of the outer ring of the planetary gear 6. Since the rotary brush 2 is rotated by being fitted into a key groove provided on the inner peripheral surface of the brush 2, the convex portion protruding from the outer ring of the planetary gear 6 and the inner peripheral surface of the rotary brush 2 are provided. If there is a gap between the groove and the key groove, when the electric motor 5 is rotated to rotate the rotary brush 2, noise is generated between the convex portion provided on the planetary gear 6 and the key groove provided on the rotary brush 2. Had the problem that a problem occurred.

In addition, since the planetary gear 6 is displaced from the rotating brush 2 by the gear clearance, noise is generated when the electric motor 5 is rotated and the rotating brush 2 is rotated. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to reduce noise and reduce noise when a rotating brush is rotated by rotating an electric motor.

[0013]

According to the present invention, in order to achieve the above object, a rotary brush is rotatably provided in a suction tool main body so as to face a suction opening opened in a lower surface of the suction tool main body. The rotating brush has an electric motor for driving the rotating brush, a speed reducer for reducing the number of rotations of the electric motor, and a brush for outputting the output of the speed reducer inside a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface. A suction device for a vacuum cleaner, comprising a power transmission device for transmitting the power to the holder, and connecting the brush holder and the power transmission device with a buffer material interposed therebetween.

Thus, the noise of the vacuum cleaner suction tool when the electric motor is rotated and the rotating brush is rotated can be reduced, and the noise can be reduced.

A vacuum cleaner having a connection port connected to a vacuum cleaner body having a dust collection chamber for collecting dust therein and an electric blower so as to communicate with the vacuum cleaner suction tool. It is.

Thus, the noise of the vacuum cleaner when the electric motor is rotated and the rotating brush is rotated can be reduced, and the noise can be reduced.

[0017]

According to the first aspect of the present invention, a suction tool main body having a suction port opened on a lower surface, and a rotatably provided inside the suction tool main body so as to face the suction port. A rotating brush, wherein the rotating brush has a substantially cylindrical brush holder provided with a dust scraping part on an outer peripheral surface, an electric motor for rotating and driving the rotating brush, and a reduction gear for reducing the rotation speed of the electric motor. A power transmission device for transmitting an output of the speed reduction device to the brush holder, wherein the motor, the speed reduction device, and the power transmission device are provided inside the brush holder, and the brush holder and the power transmission device are buffered. When the electric motor provided inside the brush holder is rotated, the brush holder is driven via the reduction gear and the power transmission device. At this time, since the cushioning material is interposed between the brush holder and the power transmission device and connected, even when a play is provided between the brush holder and the power transmission device during assembly. The noise can be absorbed by the cushioning material, the noise of the vacuum cleaner suction tool when the electric motor is rotated and the rotating brush is rotated can be reduced, and the noise can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a bearing for pivotally supporting both the electric motor and the reduction gear inside the brush holder.
For the brush holder, not only the motor but also the reduction gear
The axis can be matched with the axis of the brush holder, and when the motor is rotated to rotate the rotating brush, the motor is rotated without causing noise from the motor or the reduction gear. The noise of the vacuum cleaner suction tool when rotated can be reduced, and the noise can be reduced.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a gear portion for connecting to a gear of a power transmission device is formed on an inner surface of the brush holder, and the inner diameter of the gear portion is reduced. hG <hZ, where hG is the inner diameter of the brush holder of the bearing supporting portion that supports the bearing portion of the reduction gear, and the motor, the reduction gear, and the power transmission device are integrally connected. When assembled in a brush holder, the brush holder can be easily incorporated, and a gear portion connected to a gear of a power transmission device on an inner surface portion of the brush holder and a bearing support for supporting a bearing portion of a reduction gear device. The part can be easily formed by resin molding.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a gear portion provided on an inner surface portion of the brush holder and a bearing support portion are formed adjacent to each other, and the gear portion of the brush holder is formed. The inner diameter h other than the part and the bearing support is larger than the inner diameters hG and hZ of the gear and the bearing support. The gear and the bearing support can be formed by resin molding using a mold.

In the invention according to the first to fourth aspects, the speed reducer has a sound insulating cylinder, and the speed reducer is rotated by holding and fixing the speed reducer to the electric motor via the sound insulating cylinder. The noise coming out of the speed reducer can be isolated by the sound insulating cylinder, the electric motor can be rotated, and the noise of the vacuum cleaner suction tool when the rotating brush is rotated via the speed reducer can be reduced. The noise can be reduced.

Further, in the invention according to the first to fourth aspects, the power transmission device is connected to the inner surface of a substantially central portion in the axial direction of the brush holder, so that when the electric motor is rotated, the brush holder is moved. It will be driven at the substantially central part in the axial direction, and when the brush holder is driven by the electric motor, the left and right ends of the brush holder will try to run, but the runout of both ends of the brush holder will be almost equal and minimum, Vibration and noise in the holding portions at both ends of the brush holder can be reduced, and noise can be reduced.

Further, in the above-mentioned invention, a holding portion for holding the rotary brush is formed in the suction tool main body, and an end portion of the rotary brush is held by interposing a buffer member in the holding portion. By doing so, the vibration caused by the rotation of the rotating brush can be absorbed by the cushioning member, and the noise of the vacuum cleaner suction tool when the rotating brush is rotated by rotating the electric motor can be reduced. Can be

According to a fifth aspect of the present invention, there is provided a vacuum cleaner body having a dust collection chamber for collecting dust therein and an electric blower.
It has a connection port connected so as to communicate with the vacuum cleaner suction tool according to any one of claims 1 to 4,
When the motor is rotated and the rotating brush is rotated, the noise of the vacuum cleaner suction tool can be reduced.
The noise of the whole vacuum cleaner can be reduced, and the noise can be reduced.

[0025]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 5, the suction tool main body 18 has a built-in rotary brush 19 (see FIG. 1) for releasing dust adhering to a surface to be cleaned such as a carpet, and a connection connected to an extension pipe 20 at the rear. The body 21 is provided rotatably. Vacuum cleaner body 2
Reference numeral 2 denotes a dust collecting chamber 23 for collecting dust therein and an electric blower 2.
And a connection port 2 provided in the cleaner body 22.
5, a hose 26 connected to the extension pipe 20 is connected, and the connecting body 21 of the suction tool main body 18 is configured to communicate with the connection port 25.

As shown in FIG. 1, the rotary brush 19 is rotatably provided in the suction tool main body 18 so as to face a suction port 27 opened on the lower surface of the suction tool main body 18. The rotary brush 19 is provided with a plurality of brushes 29 constituting a dust scraping portion on an outer peripheral surface of a substantially cylindrical brush holder 28 formed of a thermoplastic resin such as ABS, polystyrene, polypropylene or the like.

It should be noted that the dust scraping portion may be a thin plate-shaped blade, a strip having a wiping effect (for example, a cloth strip), or a combination thereof as appropriate, in addition to the brush 29.

As shown in FIG. 2, an electric motor 3 for rotatingly driving the rotating brush 19 is provided inside the brush holder 28.
0, a reduction gear 31 for reducing the number of rotations of the electric motor 30, a gear (power transmission device) 32 for transmitting the output of the reduction gear 31 to the brush holder 28, and the like. Here, the rotating brush 19 has a built-in electric motor 30, a speed reduction device 31, and the like, and has a diameter of 2 from the torque of the electric motor 30 and the performance of scraping up dust at the tip of the brush 29 on the outer peripheral surface.
6 mm to 43 mm.

The motor 30 is composed of a commutator motor, and is provided with a motor board 33 on which a rectifier for rectifying a commercial power supply voltage, a noise suppressor, etc. are mounted. Connected lead wire 34
And is configured to be driven by a rectified voltage of the commercial power supply voltage. Here, the rotation speed of the electric motor 30 is
Since rotation is transmitted to the brush holder 28 via the reduction gear 31, the rotation speed is set to 3000 rpm to 15000 rpm. 3000rpm ~ 12000r when cleaning carpet
pm is preferred. The overcurrent prevention device 35 includes a positive temperature coefficient thermistor or the like, and prevents an overcurrent from flowing through the electric motor 30.

The speed reducer 31 is constituted by a planetary gear and connects the output shaft 36 of the electric motor 30 to reduce the rotational speed of the electric motor 30. Here, the reduction ratio of the reduction gear 31 is 1/3 to 1/9.
(Preferably, 1/5 to 1/7). The sound insulation tube 37 is
It covers the outer periphery of the speed reducer 31 and shields the sound, and is formed by aluminum die casting or plastic molding. The motor 30 is held and fixed via the sound insulation tube 37, the motor 30 and the reduction gear 31 are integrally connected, and the gear 32 is fitted to the output shaft 38. Bearing 39
The brush holder 28 supports a reduction gear 31 integrally formed with the electric motor 30. The inner ring is fixed to the small diameter portion 40 of the reduction gear 31, and the outer ring is fixed to the brush holder 28.
Are supported by the bearing support portion 41 of the first embodiment.

On the commutator 30a side of the electric motor 30, a hollow shaft 42 having a hollow inner diameter and integrally supporting the electric motor 30 and integrally formed with the reduction gear 31, is fixed. The hollow shaft 42 is made of a material that is hard to deform, such as an aluminum alloy, carbon steel (S45C), or industrial plastic, and has an inner diameter of 13 mm so that cooling air can be smoothly introduced. The inner ring of the bearing 43 is fixed to the hollow shaft 42, and the outer ring is supported by a cap 44 fixed to the end of the brush holder 28.

The gear 32 is made of industrial plastic such as polyacetal or polyamide, and has a gear portion 45 formed on the inner surface of the brush holder 28 as shown in FIG.
The hole 46 that engages with the output shaft 38 of the reduction gear transmission 31 is made of carbon steel (S45C), stainless steel, a sintered alloy, or the like. A cushioning material 47 made of rubber, elastomer, or the like is interposed at a portion meshing with the gear portion 45, and the meshing sound between the tooth profiles is buffered by the elasticity of rubber, elastomer, or the like.

Here, the gear portion 45 is provided in the brush holder 2.
The gear 3 is formed on the inner surface at the substantially central portion in the axial direction of the gear 8.
2 is connected to the brush holder 28 at a substantially central portion in the axial direction of the brush holder 28. A cooling air passage hole 48 is provided outside the gear portion 45.
Communicates with the cooling air passage 49 passing from the hollow shaft 42 to the outside of the electric motor 30 and the reduction gear 31, and also communicates with the ventilation hole 50 provided in the brush holder 28.

The ventilation hole 50 is provided on the outer peripheral surface of the brush holder 28 at a position facing the connecting body 21. A dust filter 51 is provided on the inner surface of the brush holder 28. Is prevented from entering. Partition wall 52 between gear portion 45 and vent hole 50
Is provided integrally with the brush holder 28 to prevent dust from entering the speed reducer 31 from the vent hole 50 side and to reduce noise generated by the speed reducer 31 or noise caused by meshing between the gear 32 and the gear portion 45. Leakage from the vent hole 50 is prevented.

Further, as shown in FIG.
And bearing support 41 for supporting bearing 39 of reduction gear 31
Are formed adjacent to each other, and when the inner diameter of the gear root 45 is hG and the inner diameter of the bearing support 41 is hZ,
It is configured so that hG <hZ. Also, the inner diameter h of the brush holder 28 other than the gear portion 45 and the bearing support portion 41
With the inner diameters hG and hZ of the gear 45 and the bearing support 41.
It's bigger.

That is, as shown in FIG. 4B, a first outer mold 28a and a second outer mold 28b forming the outer peripheral surface of the brush holder 28, a bearing support portion 41 having an inner diameter of hZ, and a tooth bottom. Of the first inner mold 2 forming the gear portion 45 having an inner diameter of hG
FIG. 4 (a) is a diagram showing a resin molding using a passage hole 48 having an inner diameter 8c and an inner diameter h and a second inner mold 28d forming a cooling air passage 49.
Is formed.

A holding portion 53 for holding the rotary brush 19 is formed inside both side ends of the suction tool main body 18, and the end portion of the rotary brush 19 is held with a buffer member 54 interposed in the holding portion 53. I have. The cushioning member 54 is formed of a material having excellent elasticity such as rubber, elastomer, or the like.
9 absorbs vibrations and vibrations caused by the rotation of
It is hard to tell to.

An intake hole 55 is provided on the side of the suction tool main body 18 facing the hollow shaft 42, and a filter 56 is interposed between the intake hole 55 and the end surface of the hollow shaft 42.
The pressure sensor 57 detects the suction pressure of the cleaner body 22 and is provided near the connector 21.

The operation of the above construction will be described. When electricity is supplied to the suction tool main body 18 and the cleaner main body 22, the electric motor 30 incorporated in the rotary brush 19 rotates, is decelerated by the speed reduction device 31, and the rotational torque is increased to rotate. Brush 19
Is driven to rotate. By the rotation of the rotating brush 19, dust attached to the carpet or the like is scraped up by the brush 29 provided on the outer peripheral surface of the brush holder 28, and the scraped up dust is sucked into the cleaner body 22 through the extension pipe 20 and the hose 26. Is done.

The diameter of the rotating brush 19 is larger than that of the conventional one by incorporating the electric motor. The speed is increased, and the performance of scraping dust from the surface to be cleaned can be improved.

At this time, a negative pressure is applied to the space surrounded by the suction device main body 18 and the floor surface, and outside air flows in from the outer periphery of the suction device main body 18. It is sucked into. Since a negative pressure also acts on the vicinity of the ventilation hole 50 inside the rotary brush 19 through the ventilation hole 50 provided facing the connecting body 21, the outside air rotates through the hollow portion of the hollow shaft 42 through the suction hole 55. Brush 19
Flows into the interior.

The cooling air passage 49 passing outside the motor 30 and the reduction gear 31 and the gear 4
5 passes through a passage hole 48 provided outside the dustproof filter 5.
Cooling air flowing out of the air holes 50 through the cooling air 1 generates the electric motor 30, the electric motor substrate 33, and the like.

On the other hand, the gear 32 meshing with the gear portion 45 formed on the inner surface of the brush holder 28 has the cushioning material 47 formed of rubber, elastomer, or the like interposed therebetween. Even when a play is provided between the gear portion 45 and the gear 32, the noise can be absorbed by the cushioning material 47 and the noise generated when the electric motor 30 is rotated and the rotating brush 19 is rotated. Can be reduced, noise can be reduced, and noise of the entire vacuum cleaner can be reduced.

Further, since both the motor 30 and the reduction gear 31 are supported by the bearings 39 and 43 inside the brush holder 28, not only the motor 30 but also the reduction gear 3
1 can also make the axis of the brush holder 28 coincide with the axis of the brush holder 28, so that when the motor is rotated to rotate the rotating brush, no noise is generated from the motor or the reduction gear. Further, since the speed reducer 31 is held and fixed to the electric motor 30 via the sound insulating tube 37, noise generated from the speed reducer 31 when the speed reducer 31 is rotated can be blocked by the sound insulating tube 37, When rotating the rotating brush 19 by rotating the electric motor 30, no noise is emitted from the electric motor 30 or the reduction gear 31, noise can be reduced, and noise can be reduced.

A gear part 45 formed on the inner surface of the brush holder 28 and a bearing support part 41 are formed adjacent to each other.
When the inner diameter of the gear part 45 is hG and the inner diameter of the brush holder 28 of the bearing support part 41 is hZ, hG <hZ, so that the motor 30, the reduction gear 31, and the gear 32 are integrated. When the thing which is connected and constructed is incorporated into the brush holder 28, it can be easily incorporated,
Further, the gear portion 45 connected to the gear 32 on the inner surface of the brush holder 28 and the bearing support portion 41 for supporting the bearing portion 39 of the reduction gear 31 can be easily formed by resin molding.

Further, the gear portion 45 of the brush holder 28
Since the inner diameter h other than the bearing support portion 41 is larger than the inner diameters hG and hZ of the gear portion and the bearing support portion, the gear portion 45 and the bearing support portion 41 can be formed by resin molding using a mold.

The gear 32 has a gear portion 45 formed on the inner surface of the brush holder 28 at a substantially central portion in the axial direction.
When the electric motor 30 is rotated, the brush holder 28 is driven at a substantially central portion in the axial direction. When the electric motor 30 drives the brush holder 28, the left and right ends of the brush holder 28 are rotated. However, the vibrations at both ends of the brush holder 28 are almost uniform and minimized, and vibration and noise at the holding portions 53 at both ends of the brush holder 28 can be reduced.
The noise can be reduced.

The holding portion 5 formed on the suction tool main body 18
Since the end of the rotating brush 19 is held with the cushioning member 54 interposed between the rotating brush 3, the vibration caused by the rotation of the rotating brush 19 can be absorbed by the cushioning material 54, and the rotating brush 1
9 can be reduced and noise can be reduced.

In this embodiment, the reduction gear 31 is supported in the brush holder 28 by the bearing 39 by being connected to the motor 30 and the reduction gear 31, and the bearing 43 is attached to the hollow shaft 42 which supports the motor 30. Is fixed and supported by a cap 44 fixed to the end of the brush holder 28. However, the motor 30 and the reduction gear 31 may be separately supported in the brush holder by bearings. The reduction gear 31 may be integrally formed and supported in the brush holder by a bearing.

[0051]

As described above, according to the first aspect of the present invention, the suction tool main body having the suction port opened on the lower surface, and the rotation inside the suction tool main body so as to face the suction port. A rotating brush provided freely, wherein the rotating brush has a substantially cylindrical brush holder provided with a dust-raising portion on an outer peripheral surface, an electric motor for driving the rotating brush to rotate, and reducing the rotation speed of the electric motor. And a power transmission device for transmitting the output of the reduction device to the brush holder, wherein the motor, the reduction device, and the power transmission device are provided inside the brush holder, and the brush holder and the power transmission device are provided. Are connected via a buffer, so that when the motor provided inside the brush holder is rotated to drive the brush holder via the reduction gear and the power transmission device, Therefore, even when there is a play between the brush holder and the power transmission device, the vacuum can be absorbed by the cushioning material, and the electric motor is rotated to rotate the rotary brush. The noise of the suction tool can be reduced, and the noise can be reduced.

Further, according to the second aspect of the present invention, since the bearing portion for supporting both the electric motor and the speed reducer in the brush holder is provided, not only the electric motor but also the speed reducer can be moved with respect to the brush holder. The axis of the brush can be matched with the axis of the brush holder, and when the motor is rotated to rotate the rotating brush, no noise is generated from the motor or the reduction gear, and the noise when the rotating brush is rotated is reduced. The noise can be reduced and the noise can be reduced.

According to the third aspect of the present invention, a gear portion connected to the gear of the power transmission device is formed on the inner surface of the brush holder, and the inner diameter of the gear portion is hG. When the inner diameter of the brush holder of the bearing supporting portion is hZ, hG <hZ, so that the motor, the reduction gear, and the power transmission device are integrally connected to each other in the brush holder. When incorporating into
It can be easily assembled, and the gear portion connected to the gear of the power transmission device and the bearing support portion supporting the bearing portion of the reduction gear device can be easily formed on the inner surface of the brush holder by resin molding. .

According to the fourth aspect of the present invention, the gear portion provided on the inner surface of the brush holder and the bearing support portion are formed adjacent to each other, and the gear portion and the bearing support portion of the brush holder other than the gear portion and the bearing support portion are provided. Is larger than the inner diameters hG and hZ of the gear portion and the bearing support portion, the gear portion and the bearing support portion can be formed by resin molding using a mold.

According to a fifth aspect of the present invention, there is provided a vacuum cleaner body having a dust collecting chamber for collecting dust therein and an electric blower, according to any one of the first to fourth aspects. Because it has a connection port that is connected to communicate with the vacuum cleaner suction tool, the noise of the vacuum cleaner suction tool can be reduced when the electric motor is rotated and the rotating brush is rotated. Therefore, the noise of the whole vacuum cleaner can be reduced, and the noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a suction tool for a vacuum cleaner according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of the suction device for the vacuum cleaner.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1;

FIG. 4 (a) is an enlarged side sectional view of a main part of the suction tool for the vacuum cleaner. (B) is a cross-sectional view of a main part of a resin molding die of a brush holder of the suction tool for the vacuum cleaner.

FIG. 5 is a perspective view of the vacuum cleaner provided with the vacuum cleaner suction tool.

FIG. 6 is a sectional view of a conventional suction device for a vacuum cleaner;

[Description of Signs] 18 Suction tool main body 19 Rotary brush 27 Suction port 28 Brush holder 29 Brush (dust scraping part) 30 Motor 31 Reduction gear 32 Gear (power transmission device) 47 Buffer material

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Fujita 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Katsutaka Murata 1006 Odaka Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Hayashi Seiko 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A suction tool main body having a suction port opened on a lower surface, and a rotating brush rotatably provided in the suction tool body so as to face the suction port, wherein the rotary brush has an outer peripheral surface. A substantially cylindrical brush holder provided with a dust scraper, an electric motor for rotationally driving the rotating brush, a speed reducer for reducing the rotation speed of the electric motor, and power for transmitting an output of the speed reducer to the brush holder A suction device for a vacuum cleaner, comprising a transmission device, wherein the electric motor, the reduction device, and the power transmission device are provided inside the brush holder, and the brush holder and the power transmission device are connected via a buffer material. 2. The suction tool for a vacuum cleaner according to claim 1, further comprising a bearing portion for supporting both the electric motor and the speed reduction device inside the brush holder. 3. A gear portion connected to a gear of a power transmission device is formed on an inner surface portion of the brush holder, an inner diameter of the gear portion is hG, and a bearing support portion of the brush holder for supporting a bearing portion of a speed reduction device is provided. The suction tool for a vacuum cleaner according to claim 1 or 2, wherein hG <hZ when the inner diameter is hZ. 4. A gear provided on the inner surface of the brush holder and a bearing support are formed adjacent to each other, and an inner diameter h of the brush holder other than the gear and the bearing support is determined by the gear and the bearing support. The suction tool for a vacuum cleaner according to claim 3, wherein the inner diameter is larger than hG and hZ. 5. A vacuum cleaner body provided with a dust collecting chamber for collecting dust therein and an electric blower so as to communicate with the vacuum cleaner suction tool according to any one of claims 1 to 4. Vacuum cleaner with a connection port to be connected to.