JP2001245831A - Suction tool for vacuum cleaner and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction tool for a vacuum cleaner which prevents its imbalance and has a good operability and dust collection performance. SOLUTION: A rotary brush 19 comprises a nearly cylindrical brush holder 28 on the periphery of which there is provided a brush 29 constituting a dust raking section and electrically powered devices 30, 30a which are provided on the both ends of the brush holder 28 to rotate it. The two electrically powered devices 30, 30a on the both ends prevent the imbalance of the suction tool body 18 and operability and dust collection performance can be improved.

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 a shaft of the electric motor 5 and reducing the rotation to transmit power to the rotating brush 2, and the electric motor 5 and the planetary gear 6
And a support member 7 disposed therebetween.

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 communicates with the air hole 16 through the hollow portion of the fixed shaft 13 to allow the outside air for cooling the electric motor to communicate with the inside of the rotary brush 2, 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 to rotate 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 configuration, the planetary gear 6 is mounted on the shaft of one motor 5 to reduce the rotation of the motor 5 and to be protruded from the outer ring of the planetary gear 6. Part into a key groove provided on the inner peripheral surface of the rotating brush 2,
Because the rotating brush 2 is rotated, if the rotating brush is rotated in the direction opposite to the direction of travel of the suction device main body, the rotating brush gives a pulling force at the time of return, but is light when going forward. There was a problem that the operation force became heavy because of the hindrance.

In addition, when the rotary brush 2 is rotated in the same direction as the forward movement of the suction tool, there is a problem in that the operation force is increased when returning.

A method of increasing the rotational force of the electric motor 5 in order to improve the operating force in only one direction, forward or backward, is conceivable. In this case, this can be achieved by increasing the size of the electric motor 5, but if the size is increased in the radial direction, the outer diameter of the rotating brush 2 is inevitably increased, and the outer shape of the suction tool main body 1 is also increased. Getting worse. On the other hand, when the rotation is increased by increasing the length of the electric motor 5, the electric motor 5 has only the fixed shaft 13;
When the other end of the electric motor 5 comes to the vicinity of the central portion, it becomes difficult to support the electric motor 5 itself. Therefore, imbalance is likely to occur, causing vibration and noise.

Next, it is possible to provide forward / reverse rotation by switching with a single motor 5, but in this case, a complicated control circuit is required, which leads to an increase in cost and mass, and also causes a spark and the like. It becomes easier and shortens the life of the electric motor 5.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a suction device for a vacuum cleaner which prevents imbalance of the suction device and has good operability and dust collecting property. .

[0015]

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 is provided with electric motors at both ends of the brush holder for rotating and driving the rotating brush of a substantially cylindrical brush holder provided with a dust scraping portion on the outer peripheral surface. It is possible to improve operability and dust collecting performance by eliminating imbalance.

[0016]

DETAILED DESCRIPTION OF THE INVENTION The invention according to a first aspect of the present invention is directed to a suction tool body having a suction port opened on a lower surface, and a rotary brush rotatably provided in the suction tool body so as to face the suction port. Since the rotating brush is constituted by a substantially cylindrical brush holder provided with a dust scraping part on at least an outer peripheral surface thereof, and an electric motor arranged at both ends of the brush holder and driving the brush holder to rotate. In addition, a large driving force can be obtained by eliminating the imbalance of the suction tool by the rotational combination of the two electric motors, and the operability and the dust collecting property can be improved.

According to a second aspect of the present invention, a brush holder is provided.
Is driven by an electric motor via a power transmission means for power transmission and a speed reduction device, so that imbalance of the suction tool can be prevented, and a larger propulsion force can be obtained.

The invention according to claim 3 is a brush holder.
When the main body goes forward and backward, the motors are rotated in the same direction as the advancing direction, so that the unbalance of the suction tool can be prevented and a larger propulsive force can be obtained.

According to a fourth aspect of the present invention, there is provided a brush holder.
Since both electric motors provided at both ends of the main body are rotated in the direction opposite to the traveling direction when the main body goes forward, imbalance of the suction tool can be prevented, and better dust collecting performance can be obtained.

According to a fifth aspect of the present invention, one of the motors is rotated in the same direction as the forward traveling direction of the main body, and the other motor is rotated in the same direction as the backward traveling direction. Greater propulsion can be obtained at the time of return.

According to the sixth aspect of the present invention, one of the motors is rotated in the direction opposite to the forward traveling direction of the main body, and the other motor is rotated in the reverse direction to the backward traveling direction, so that better dust collecting performance can be obtained. it can.

According to the seventh aspect of the present invention, since a flange for preventing intrusion of hair and the like is formed on the outer peripheral portion of the electric motor, a hair intrusion prevention structure can be formed at low cost.

According to the eighth aspect of the present invention, the performance of the motor can be improved because the flange for preventing invasion of hair and the like is integrated with the body winding of the motor.

According to a ninth aspect of the present invention, there is provided a vacuum cleaner having a dust collection chamber for collecting dust therein and an electric blower,
Since the connection port is provided so as to be connected to the suction tool for a vacuum cleaner according to any one of claims 1 to 8, the operability of the suction tool and the dust collection property are improved. be able to.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

As shown in FIG. 9, the suction tool main body 18 has a built-in rotary brush 19 for releasing dust adhering to the surface to be cleaned such as a carpet, and a connecting member 2 connected to an extension pipe 20 at the rear.
1 is rotatably provided. The cleaner main body 22 includes a dust collecting chamber 23 for collecting dust therein and an electric blower 24. A hose 26 connected to the extension pipe 20 is connected to a connection port 25 provided in the cleaner main body 22. The connecting body 21 of the suction tool main body 18 is configured to communicate with the connection port 25.

As shown in FIGS. 1 and 2, the rotating 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.

The dust-raising portion may be a brush as shown, a thin blade, a strip having a wiping effect (for example, a cloth strip), or a combination of these as appropriate. There may be.

Next, referring to FIG.
Will be described. An electric motor 30 for rotatingly driving the rotating brush 19 is attached so that its end is exposed from the end face of the brush holder 28. Reduction gear 31 for reducing the number of rotations of electric motor 30, gear (power transmission device) 32 for transmitting the output of reduction gear 31 to brush holder 28
And so on. 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 26 mm or more in consideration of the maximum 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. 43mm
And

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 r / min to 15000 r / min. 3000 r / min ～ 12 when cleaning carpet
000 r / min 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 rotation 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
The sound is shielded by covering the outer periphery of the speed reducer 31, and is formed by aluminum die casting or plastic molding. The motor 30 and the speed reducer 31 are integrally connected via the sound insulation tube 37, and a gear 32 is attached to the output shaft 38.
Are fitted. The bearing portion 39 supports the speed reducer 31 integrally formed with the electric motor 30 on the brush holder 28. The inner ring portion of the bearing portion 39 is fixed to the small-diameter portion 40 of the speed reducer 31, and the outer ring portion is a brush. It is supported by the bearing support 41 of the holder 28.

On the side of the commutator 30a of the electric motor 30, a holder 42 integrally formed with the electric motor 30 for supporting the electric motor 30 integrally connected to the speed reducer 31 is fixed.
This holder 42 is made of aluminum alloy, carbon steel (S4
5C), and is made of a material that is hardly deformed, such as industrial plastic.

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 or the like), stainless steel, a sintered alloy, or the like. In the part that meshes with the gear part 45,
With a cushioning member 47 formed of rubber, elastomer, or the like interposed, the meshing sound is buffered between the tooth profiles due to 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 and at a position facing the connecting body 21.
As shown in the figure, a dust filter 51 is provided on the inner surface of the brush holder 28 to prevent dust from entering the inside of the brush holder 28 through the ventilation hole 50.

Further, as shown in FIG.
The other end 12 is also a motor 30a for driving the rotary brush 19 to rotate, and a reduction gear 31 for reducing the rotation speed of the motor 30b.
a, a gear (power transmission device) 32a for transmitting the output of the reduction gear 31a to the brush holder 28, and the like. The speed reducer 31 is constituted by a planetary gear, connects the output shaft 36a of the electric motor 30b, and reduces the rotation speed of the electric motor 30b.

Here, the reduction ratio of the reduction gear 31a is 1/3 to
1/9 (preferably, 1/5 to 1/7). The gear 32a is fitted to the output shaft 38a. Bearing 39a
Is a reduction gear 31a integrally connected to the motor 30b.
Is supported by the brush holder 28, the inner ring is fixed to the small-diameter portion 40a of the reduction gear 31a, and the outer ring is supported by the bearing support portion 41a of the brush holder 28. A holder 42b integrated with the motor 30b that supports the motor 30b integrally connected to the reduction gear 31a is fixed. The holder 42b is made of a material that is not easily deformed, such as an aluminum alloy, carbon steel (S45C or the like), or industrial plastic.

Holding portions 53, 5 for rotatably holding both ends of the rotating brush 19 are provided inside both side ends of the suction tool main body 18.
3a are formed, and buffer members 54, 5 are attached to the holding portions 53, 53a.
The end of the rotating brush 19 is held with the interposition of 4a. The cushioning member 54 is formed of a material having excellent elasticity such as rubber and elastomer, and absorbs vibration and chatter due to the rotation of the rotating brush 19 and makes it difficult to transmit the vibration to the suction device main body 18.

A ventilation hole 50 is provided on the side of the suction tool main body 18 facing the hollow shaft 42, and a filter 56 is interposed in the vicinity of the ventilation hole 50.

The operation of the above construction will be described. When the suction tool main body 18 and the cleaner main body 22 are energized, 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. The brush holder 28 rotates. By the rotation of the brush holder 28, 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 passed through the extension pipe 20 and the hose 26 to the cleaner body 22. Is sucked.

The diameter of the rotating brush 19 is larger than that of the conventional one by incorporating the electric motor 30, but the larger the diameter, the more the rotation speed becomes the same as that of the conventional one. The peripheral 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. Thereby, the electric motor 30 is cooled,
This has the effect of extending the life.

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.

Further, since the electric motors 30 and 30b are disposed symmetrically inside the brush holder 28, the electric motors 30 and 30a rotate the rotary brush 19 in the same direction as the forward traveling direction of the suction tool main body 18. Are rotated in the same direction at the same time, a rotational force twice as large as that of only one piece is obtained, so that operability and dust collection performance can be improved. (Because the operation force when moving the suction tool body 18 at the time of going forward is heavy)
In addition, if the operability and dust collection performance of one electric motor 30 are sufficient depending on the type of the surface to be cleaned, the electric motors 30 and 30a can be reduced in size. Accordingly, the diameter of the brush holder 28 can be reduced within a range that does not hinder the dust collection performance, so that the suction tool main body 18 can be reduced in size. Electric motor 3
With the downsizing of 0 and 30a, the entire driving mechanism such as the reduction gear 31 can be downsized, so that the total mass can be reduced.

In order to obtain a large rotational force by using the motor 30a alone, there is a method of increasing the length of the motor 30. In this case, since the motor 30 has a cantilever structure, the motor 30 is provided at the center of the brush holder 18. The closer it is, the more likely it is to become unbalanced, which may cause vibration and noise. However, by using two electric motors 30, a balanced and smooth rotation can be achieved.

When the motor 30 is made large in diameter in order to obtain a large rotating force by itself, the outer shape of the brush holder 28 becomes large, the suction tool main body 18 becomes large, and it becomes difficult to enter a gap between furniture and the like. Although the usability is deteriorated, for example, by sharing the torque between the two motors, each motor can be reduced in size, and it is possible to prevent the suction tool main body 18 from being enlarged.

Further, by using two motors 30, 30a, cooling air can be taken in from both ends of the brush holder, so that the cooling efficiency is improved, and the motors 30, 30a are improved.
There is also an effect of extending the life of a.

When the rotary brush 19 is rotated by the motors 30 and 30b and the two motors in the direction opposite to the forward traveling direction of the suction tool body 18, the operability at the forward time becomes heavy, but the dust collecting performance is increased. Improves.

When the suction tool main body 18 goes forward, one motor 30 is rotated in the same direction as the traveling direction, and when the suction tool main body 18 is returned, the other motor 30b is rotated in the direction opposite to the traveling direction of the suction tool main body 18. The operability of the suction tool main body 18 can be improved both at the time of going and returning. At this time, the turning on and off of the electric motors 30 and 30b may be performed by a switching configuration of the circuit. However, the clutch mechanism may be built in the reduction gear transmissions 31 and 31a or provided separately.

Further, when the suction tool main body 18 moves forward, the rotating brush 19 is rotated in the direction opposite to the traveling direction by one electric motor 30, and when returning, the rotating brush 19 is rotated in the traveling direction by the opposite electric motor 30b. If this is done, the operability will be degraded, but the dust collection performance can be improved both in the forward and backward directions. At this time, the turning on and off of the electric motors 30 and 30b may be performed by a switching configuration of the circuit. However, the clutch mechanism may be built in the reduction gear transmissions 31 and 31a or provided separately.

It is also possible to switch the direction of rotation with one motor 30, but it is easy for sparks to appear and the motor 3
0 may shorten the life, but use two motors,
If each direction of rotation is set to one direction, there is no need to worry.

Further, the electric motor 30 at the time when the operation force becomes large
It is also possible to change the specifications of the carbon brush and the motor at the time of return with a light operating force. In other words, it is possible to reduce the cost by reducing the specification of the motor at the time of going to a strong motor and the motor at the time of returning to a weak motor, so that the optimal electric motor can be arranged and the life of the suction tool body 18 can be extended. You can do it.
Further, if the electric blowers 30 and 30b are of a brushless type, the switching configuration of the circuit can be easily formed, and the circuit can be made small and inexpensive.

Further, the flanges 55, 55a are formed in a U-shape at the rear portions of the electric motors 30, 30b for preventing the invasion of the hair, so that the function of preventing the intrusion of the hair can be achieved.

Further, by winding the flanges 55 and 55a around the diameters of the electric motors 30 and 30b as shown in FIG. 7, the performance of the electric motors 30 and 30b can be improved and a thread cutting function can be provided.

[0055]

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 rotary brush provided freely, wherein the rotary brush is provided with a substantially cylindrical brush holder provided with a dust scraper on at least an outer peripheral surface thereof; and a brush holder provided at both ends of the brush holder. Since the motor is constituted by a rotating electric motor, it is possible to prevent imbalance of the suction tool and to obtain a large driving force.

According to the second aspect of the present invention, the brush holder is driven by the electric motor via the power transmission means for power transmission and the reduction gear, so that the unbalance of the suction tool is prevented, and greater propulsion is achieved. You can gain power.

According to the third aspect of the present invention, the two electric motors provided with the brush holders at both ends are rotated in the same direction as the forward traveling direction of the main body. Self-propelled power can be obtained, and usability is improved.

According to the fourth aspect of the present invention, since both motors provided at both ends of the brush holder are rotated in the direction opposite to the traveling direction when the main body goes forward, imbalance of the suction tool is prevented. The dust scraping performance is improved, and better dust collecting performance can be obtained.

According to the fifth aspect of the present invention, one of the motors is rotated in the same direction as the forward traveling direction of the main body, and the other motor is rotated in the same direction as the backward traveling direction. Prevention, and self-propelled performance is obtained both at the time of going and returning,
Since greater propulsion can be obtained, operability can be improved.

According to the sixth aspect of the present invention, one motor is rotated in the direction opposite to the forward traveling direction of the main body, and the other motor is rotated in the direction opposite to the backward traveling direction. Thus, the performance of the rotary brush for scraping up dust is improved, and better dust collection performance can be obtained.

According to the seventh aspect of the present invention, since the flange for preventing the invasion of the hair and the like is formed on the outer peripheral portion of the electric motor, it is possible to form the intrusion prevention structure of the hair at low cost.

According to the eighth aspect of the present invention, the flange for preventing invasion of hair and the like is integrated with the body winding of the motor, so that the performance of the motor can be improved.

According to the ninth aspect of the present invention, there is provided an electric vacuum cleaner having a dust collecting chamber for collecting dust therein and an electric blower, the electric vacuum cleaner according to any one of the first to eighth aspects. Since the connection port is provided so as to be connected to the suction device for a vacuum cleaner, the operability of the suction device and the dust collecting property can be improved.

[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 explanatory view of the operation of the vacuum cleaner suction tool.

FIG. 3 is an explanatory view of the operation of the vacuum cleaner suction tool.

FIG. 4 is an explanatory view of the operation of the vacuum cleaner suction tool.

FIG. 5 (a) Operation explanatory view of the vacuum cleaner suction tool (at the time of forward movement) (b) Operation explanatory view of the same vacuum cleaner suction tool (at the time of return movement)

FIG. 6A is an explanatory diagram of the operation of the suction device for the electric vacuum cleaner (at the time of forward movement); FIG. 6B is an explanatory diagram of the operation of the suction device for the electric vacuum device;

FIG. 7 is an explanatory view of the operation of the vacuum cleaner suction tool.

FIG. 8 is a sectional view of a suction device for a vacuum cleaner showing another example.

FIG. 9 is an overall configuration diagram of a vacuum cleaner using the vacuum cleaner suction tool of the present invention.

FIG. 10 is a cross-sectional view of a conventional vacuum cleaner suction tool.

[Explanation of symbols]

 Reference Signs List 18 suction tool main body 19 rotating brush 27 suction port 28 brush holder 29 brush (dust scraping part) 30, 30b electric motor 31, 31a reduction gear 32, 32a gear (power transmission device) 47 cushioning material

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Fujita 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 3B061 AA06 AA26 AD05 AD06 AD16 AE02 AE13

Claims (9)

[Claims] 1. A suction tool main body having a suction port opened on a lower surface, and a rotary brush rotatably provided in the suction tool main body so as to face the suction port, wherein the rotary brush is provided at least on an outer peripheral surface. A suction tool for a vacuum cleaner, comprising: a substantially cylindrical brush holder provided with a dust scraper; and an electric motor disposed on both ends of the brush holder and rotating the brush holder. 2. The suction tool for an electric vacuum cleaner according to claim 1, wherein the brush holder is driven by an electric motor via a power transmission means for power transmission and a reduction gear. 3. The motor according to claim 1, wherein both electric motors provided at both ends of the brush holder are rotated in the same direction as the advancing direction when the main body moves forward.
The suction device for a vacuum cleaner according to the above. 4. The motor according to claim 1, wherein both electric motors provided at both ends of the brush holder are rotated in a direction opposite to a traveling direction when the main body goes forward.
Or the suction device for a vacuum cleaner according to 2. 5. The vacuum cleaner according to claim 1, wherein one of the motors is rotated in the same direction as the forward traveling direction of the main body, and the other motor is rotated in the same direction as the backward traveling direction. Utensils. 6. The vacuum cleaner according to claim 1, wherein one of the motors is rotated in a direction opposite to the forward traveling direction of the main body, and the other motor is rotated in a direction opposite to the backward traveling direction. Utensils. 7. The suction tool for a vacuum cleaner according to claim 1, wherein a flange for preventing intrusion of hair or the like is formed on an outer peripheral portion of the electric motor. 8. The suction tool for an electric vacuum cleaner according to claim 7, wherein a flange for preventing invasion of hair and the like is integrated with a body winding of the electric motor. 9. A vacuum cleaner main body having a dust collecting chamber for collecting dust therein and an electric blower is connected to the vacuum cleaner suction tool according to any one of claims 1 to 7. Vacuum cleaner with a connection port to be connected to.