JP2000316762A - Suction tool for vacuum cleaner, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure for supplying electric power to a suction tool body from a cleaner body and to reduce temp. rising by improving the cooling efficiency of a motor, in a suction tool for vacuum cleaner provided with a rotary brush to be rotated by the motor and the vacuum cleaner to which the suction tool is connected. SOLUTION: This vacuum cleaner is provided with a rotary brush 19 in a rotatable manner in a suction tool body 18 so as to face a suction port 27 opened at the lower surface of the body 18. The brush 19 has a motor 30 for rotate-driving the brush 19 and a battery 31 for driving the motor 30 inside of a nearly cylindrical brush holder 28 provided with a brush 29 on its outer peripheral surface. In this case, a hollow axis 44 for putting a conductor 36 is fixed to one end of the holder 28, an air intake port 50 is provided at the other end of the holder 28, and an opening part 52 for discharging cooling air is provided on the outer peripheral surface of the holder 28.

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, when the cleaner main body is operated, a negative pressure is applied to the space surrounded by the suction tool main body 1 and the floor surface, and outside air leaks from the fixed shaft 17 through the hole 17. 13, flows into the interior of the rotating brush 2, passes around the electric motor 5, flows toward the ventilation hole 16, can cool the electric motor 5, and can reduce a rise in temperature. .

However, since the electric motor 5 is driven by the electric power supplied from the cleaner main body, it is necessary to wire a lead wire from the cleaner main body through a hose and an extension pipe, and the structure of the extension pipe becomes complicated. Had the problem of becoming

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to simplify the structure of power supply from the cleaner body to the suction tool body, further increase the cooling efficiency of the electric motor, and reduce the temperature rise. I have.

[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 rotating the rotating brush and a battery for driving the electric motor inside a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface, and a conductive brush is provided at one end of the brush holder. A suction tool for a vacuum cleaner having a hollow shaft through which a wire passes, an air intake port provided at the other end of the brush holder, and an opening for discharging cooling air at an outer peripheral surface of the brush holder.

This eliminates the need for a conductive wire for supplying power from the cleaner main body to the suction tool main body, thereby simplifying the structure of the extension tube and the like. By taking in the cooling air from the separately provided air intake, the cooling efficiency of the electric motor can be increased, and the rise in temperature 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.

This eliminates the need for a conductive wire for supplying power from the main body of the vacuum cleaner to the main body of the suction tool, thereby simplifying the structure of the extension pipe and the like. And the temperature rise 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 an electric motor that rotationally drives the rotating brush and a battery that drives the electric motor in a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface, A suction shaft for a vacuum cleaner, wherein a hollow shaft for passing a conductive wire is attached to one end of the brush holder, an air intake is provided at the other end of the brush holder, and an opening for discharging cooling air is provided on an outer peripheral surface of the brush holder. By driving the electric motor built into the rotating brush with a battery,
Eliminates the need for conductive wires to supply power from the cleaner body to the suction tool body, and eliminates the need to wire conductive wires to the extension tube.
The structure of the extension tube can be simplified and reduced in weight, and the cooling efficiency of the motor can be increased by taking in cooling air from the air intake provided separately from the hollow shaft through which the conductive wire passes through the brush holder. , The temperature rise can be reduced and the battery can be cooled at the same time,
The temperature rise at the time of discharge can be reduced.

According to a second aspect of the present invention, there is provided the suction tool for a vacuum cleaner according to the first aspect, wherein a hollow shaft is provided at the other end of the brush holder, and the hollow shaft is used as an air inlet. Since the air inlet is a hollow shaft, there is no need for a partition wall to take in air into the brush holder, and the structure can be simplified.When the rotating brush is rotated by driving the motor built in the rotating brush, Wind noise can be eliminated and noise can be eliminated, and a large amount of cooling air can flow into the brush holder from the hollow shaft, increasing the cooling efficiency of the motor and battery, increasing the temperature Can be reduced.

According to a third aspect of the present invention, in the second aspect of the present invention, the hollow shaft is a vacuum cleaner suction tool fixed to the other end of the brush holder and supported by a bearing portion. The brush holder can be rotatably supported in the suction tool main body by the bearing via the hollow shaft, and the rotating brush constituted by the brush holder can be stably rotated.

The invention described in claim 4 is the above-mentioned claim 1 to claim 1.
3. The suction device for a vacuum cleaner according to the invention described in 3, wherein air is taken in from both ends of the brush holder and discharged from an opening provided on the outer peripheral surface, and the electric motor built in the rotating brush is driven by a battery. When the rotating brush is rotated, a large amount of cooling air can flow into the brush holder from both ends of the brush holder, increasing the cooling efficiency of the motor and battery and reducing the temperature rise. it can.

[0021] The invention described in claim 5 is the above-mentioned claim 1-
4. The suction device for a vacuum cleaner according to claim 4, wherein the opening provided on the outer peripheral surface of the brush holder is provided on a hollow shaft side through which a conductive wire passes from the electric motor, and the electric motor built in the rotating brush is driven by a battery. When rotating the rotating brush, when the cooling air flowing in from the opposite side of the hollow shaft through which the conductive wire of the brush holder passes is discharged from the opening provided on the outer peripheral surface,
Since it always passes through the motor, the cooling efficiency of the motor can be increased, and the temperature rise can be reduced.

The invention described in claim 6 is the above-mentioned claim 1-
5. The suction device for a vacuum cleaner according to claim 5, wherein an opening provided on an outer peripheral surface of the brush holder is located at a position facing the battery, and the rotating brush is rotated by driving an electric motor built in the rotating brush with the battery. When this is done, the battery can be cooled by the cooling air discharged from the opening, the temperature rise during battery discharging can be reduced, and since the opening communicates with the outside of the brush holder, It is possible to reduce a rise in temperature when charging the battery.

The invention described in claim 7 is the above-described claim 1 to claim 1.
6. The suction device for a vacuum cleaner having a dustproof filter disposed upstream of an air intake according to the invention described in 6, wherein the electric motor built in the rotating brush is driven by a battery to rotate the rotating brush. When the cooling air flows into the holder, dust can be prevented from entering the brush holder.

The invention according to claim 8 provides a vacuum cleaner body having a dust collection chamber for collecting dust and dust therein and an electric blower,
A vacuum cleaner having a connection port connected to communicate with the vacuum cleaner suction tool according to claim 1, wherein power is supplied from the cleaner body to the suction tool body. For this purpose, the structure of the extension pipe and the like can be simplified by eliminating the conductive wire, the cooling efficiency of the electric motor of the vacuum cleaner suction tool can be increased, and the temperature rise can be reduced.

[0025]

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

(Embodiment 1) As shown in FIG. 3, a suction tool main body 18 incorporates a rotating brush 19 (see FIG. 1) for releasing dust adhering to a surface to be cleaned such as a carpet, and an extension pipe 20 is provided at a rear portion. A connecting body 21 connected to 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 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.

The dust scraping portion may be a thin plate-shaped blade, a strip having a wiping effect (for example, a cloth strip) or the like 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 battery 31 for driving the electric motor 30, a reduction gear 32 for reducing the rotation speed of the electric motor 30, a gear 33 for transmitting the output of the reduction gear 32 to the brush holder 28, and the like. Here, the rotating brush 19 has a built-in electric motor 30, a reduction gear 32, etc., and increases the diameter of the brush holder 28 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. Is preferred.

The motor 30 is composed of a commutator motor, and is connected to a terminal 30b formed of a spring material so as to be able to press-contact the terminal 31a of the battery 31 on the side of the commutator 30a and a terminal 3 for connecting the conductive wire 36.
0c is provided. An opening 30d for taking in cooling air for cooling the inside of the motor 30 and an opening 30e for discharging the cooling air are provided. The electric motor 30 is driven by applying a voltage from a battery 31.

Here, the rotation speed of the electric motor 30 is set to 3000 rpm to 15000 rpm because the rotation is transmitted to the brush holder 28 via the reduction gear 32. When cleaning a carpet, 3000 rpm to 12000 rpm is preferable. The overcurrent prevention device 34 includes a positive temperature coefficient thermistor or the like, and prevents an overcurrent from flowing through the electric motor 30.

The battery 31 is a rechargeable battery such as a nickel-cadmium battery. The battery 31 is housed in a battery case 35 and connected to the control unit 3 via a conductive wire 36 connected to terminals 31a and 31b.
7 and a charger (not shown) connected to a charging terminal 37a provided in the controller 37.

The controller 37 is connected between the terminal 30c of the electric motor 30 and the terminal 31b of the battery 31, and is connected to the cleaner main body 22.
Alternatively, the motor 3 may be turned on or off by light, radio waves, or the like from a hand operation unit 26 a provided at the end of the hose 26.
0 is turned on and off.

The speed reducer 32 is constituted by a planetary gear and connects the output shaft 38 of the electric motor 30 to reduce the rotational speed of the electric motor 30. Here, the reduction ratio of the reduction gear 32 is 1/3 to 1/9.
(Preferably, 1/5 to 1/7). The sound insulation cylinder 39 is
It covers the outer periphery of the speed reducer 32 to provide sound insulation, and is formed by aluminum die casting or plastic molding. The motor 30 and the reduction gear 32 are integrally formed and fixed to the electric motor 30 via the sound insulation cylinder 39, and the gear 33 is fitted to the output shaft 40. The bearing part 41 is provided with a reduction gear 32 integrally formed with the electric motor 30 and the brush holder 2.
8, the inner ring is a small diameter portion 42 of the reduction gear 32.
, And the outer ring is supported by a bearing support 43 formed to protrude from the inner surface of the brush holder 28.

The battery case 35 containing the battery 31 has:
A hollow shaft 44 for supporting the battery 31 integrally formed with the electric motor 30 and the speed reducer 32 is fixed through the conductive wire 36 having a hollow inner diameter. The hollow shaft 44 is made of a material that is difficult 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 45 is fixed to the hollow shaft 44, and the outer ring is supported by a cap 46 fixed to the end of the brush holder 28.

The gear 33 is made of industrial plastic such as polyacetal or polyamide, and
8 meshes with a gear portion 47 formed on the inner surface of the
A cushioning material 48 made of rubber, elastomer, or the like is interposed between the portions that mesh with 7, and the sound of meshing between the tooth profiles is buffered by the elasticity of rubber, elastomer, or the like. The gear portion 47 is formed so as to protrude from an inner surface of a substantially central portion of the brush holder 28 in the axial direction.

An air inlet 50 is provided at the opposite end of the brush holder 28 to which the hollow shaft 44 is attached. The air inlet 50 communicates with a passage hole 49 provided outside the gear portion 47, and The cooling air passage 51 passes through the outside of the brush holder 28 and communicates with an opening 52 provided on the outer peripheral surface of the brush holder 28. The hollow shaft 44 communicates with the cooling air passage 51 through a battery case 35 and a ventilation hole 53 provided in the battery case 35, and the brush holder 2.
8 communicates with an opening 52 provided on the outer peripheral surface. The opening 52 is provided on the outer peripheral surface of the brush holder 28, on the hollow shaft 44 side of the electric motor 30, at a position facing the battery 31. Here, the opening 52 is located at a position substantially facing the connecting body 21.

An intake hole 54 is provided on the side of the suction tool body 18 facing the air intake 50, and a partition wall 28a is provided so as to communicate between the intake hole 54 and the air intake 50. A filter 55 is provided to prevent dust from entering the brush holder 28 from the air inlet 50. An intake hole 56 is provided on a side surface of the suction tool main body 18 facing the hollow shaft 44, and a filter 57 is interposed between the intake hole 56 and an end surface of the hollow shaft 44.

A holding portion 58 for holding the rotating brush 19 is formed inside both side ends of the suction tool main body 18, and an end of the rotating brush 19 is held on the holding portion 58 with a buffer member 59 interposed therebetween. I have. The cushioning member 59 is made 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.

The operation of the above configuration will be described. When the cleaner main body 22 is energized and an ON signal is output from the cleaner main body 22, the electric motor 30 incorporated in the rotating brush 19 rotates and is decelerated by the speed reduction device 32. The torque is increased and the rotating brush 19 is driven to rotate. Rotating brush 19
With the rotation of, 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, and the scraped-up dust is sucked into the cleaner body 22 via the extension pipe 20 and the hose.

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. Then, a negative pressure also acts near the opening 52 inside the rotating brush 19 through the opening 52 provided facing the connecting body 21, so that the outside air passes through the air inlet 50 through the air inlet 54 and the rotating brush 19 And through the hollow portion of the hollow shaft 44 through the suction hole 56 into the rotary brush 19.

The cooling air passage 51 passing outside the motor 30, the battery 31 and the reduction gear 32 is formed by the inflowing outside air.
And cooling air flowing through the opening 52 through the interior of the electric motor 30 to cool the electric motor 30, the battery 31 and the like,
Further, the air passage 53 passes through the hollow portion of the hollow shaft 44 from the intake hole 56, and passes through the air hole 53 provided in the battery case 35, and the opening 52
The battery 31 can be cooled by the cooling air flowing out of the battery 31.

Here, since the electric motor 30 is driven by applying a voltage from the battery 31, a conductive wire for supplying electric power from the cleaner main body 22 to the suction tool main body 18 can be eliminated, and the electric motor 30 can be extended. There is no need to wire conductive lines to the tube 20,
The structure of the extension tube 20 can be simplified and reduced in weight,
Further, the hollow shaft 4 for passing the conductive wire 36 through the brush holder 28
4, cooling air is taken in from an air inlet 50 provided separately from the air inlet 50.
Since the cooling air is discharged from 2, the cooling efficiency of the electric motor 30 can be increased, and the temperature rise can be reduced. Furthermore, the battery 31 can be cooled at the same time, and the temperature rise during discharging can be reduced.

Further, since cooling air is taken in from both ends of the brush holder 28, the brush holder 28
A large amount of cooling air can flow into the inside, the cooling efficiency of the electric motor 30 and the battery 31 can be increased, and the rise in temperature can be reduced.

Further, since the opening 52 provided on the outer peripheral surface of the brush holder 28 is provided on the hollow shaft 44 side of the electric motor 30, when the rotating brush 19 is rotated, the air flows in from the air inlet 50 of the brush holder 28. When the cooling air is discharged from the opening 52, the cooling air always passes through the electric motor 30, so that the cooling efficiency of the electric motor 30 can be increased and the temperature rise can be reduced.

Further, since the opening 52 provided on the outer peripheral surface of the brush holder 28 is located at a position facing the battery 31, when the rotating brush 19 is rotated, the battery 31 is cooled by the cooling air discharged from the opening 52. It is possible to cool and reduce a rise in temperature when the battery 31 is discharged, and to reduce a rise in temperature when charging the battery 31 because the opening 52 communicates with the outside of the brush holder 28. Can be.

Further, since a dustproof filter 55 is provided upstream of the air inlet 50 and a dustproof filter 57 is provided upstream of the hollow shaft 44, the rotating brush 19
Is rotated, and when cooling air flows into the brush holder 28, dust can be prevented from entering the brush holder 28.

In this embodiment, the brush holder 28
Cooling air is taken in from an air intake port 50 provided at one end of the brush holder 28 and cooling air is taken in from a hollow shaft 44 provided at the other end of the brush holder 28 to cool the electric motor 30, the battery 31, and the like. By closing the ventilation hole 53 communicating with the cooling air passage 51 provided in the battery case 35, the electric motor 30, the battery 31 and the like can be cooled only by the air taken in from the air inlet 50, and the battery case 35, The configuration of the hollow shaft 44 can be simplified.

(Embodiment 2) As shown in FIG.
Numeral 0 is fixed to a brush holder 61, and is rotatably supported on a suction tool main body 63 by a metal bearing (bearing portion) 62 constituting a bearing portion. The hollow shaft 60 takes cooling air into a rotating brush 64. It has an air intake. An intake hole 65 is provided on a side surface of the suction tool main body 63 facing the hollow shaft 60, and a dustproof filter 66 is provided between the intake hole 65 and the hollow shaft 60. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. When the electric motor 30 incorporated in the rotating brush 64 is rotated in the same manner as in the first embodiment, the 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 61, and the scraped dust is extended. It is sucked into the cleaner body 22 through the pipe 20 and the hose 26.

At this time, outside air flows into the rotary brush 64 from the intake hole 65 through the hollow shaft 60 forming an air intake, and also passes through the hollow portion of the hollow shaft 44 from the intake hole 56 to the rotary brush 64. Flows into the interior.

The cooling air passage 51 passing outside the motor 30, the battery 31 and the reduction gear 32 is caused by the inflowing outside air.
And cooling air flowing through the opening 52 through the interior of the electric motor 30 to cool the electric motor 30, the battery 31 and the like,
Further, the air passage 53 passes through the hollow portion of the hollow shaft 44 from the intake hole 56, and passes through the air hole 53 provided in the battery case 35, and the opening 52
The battery 31 can be cooled by the cooling air flowing out of the battery 31.

Here, since the outside air flows into the inside of the rotary brush 64 through the hollow shaft 60 constituting the air intake, the partition wall for taking in the air into the brush holder shown in the first embodiment. 28a is unnecessary, the structure can be simplified, and when the electric motor 30 built in the rotating brush 64 is driven to rotate the rotating brush 64, wind noise is eliminated and noise can be eliminated, and the brush holder 61 can be eliminated. A large amount of cooling air can flow into the brush holder 61 from the hollow shaft 60 provided at the other end of the
The cooling efficiency of the electric motor 30 and the battery 31 can be increased, and the temperature rise can be reduced.

The hollow shaft 60 has a brush holder 61.
The brush holder 61 is rotatably supported in the suction tool main body 63 by the metal bearing 62 via the hollow shaft 60 because the brush holder 61 is rotatably supported by the metal bearing 62. Constituting rotating brush 64
Can be rotated stably.

In this embodiment, the hollow shaft 60 is fixed to the brush holder 61 and supported by a metal bearing 62. However, the hollow shaft 60 is fixed to the suction tool main body 63, and the hollow shaft 60 is connected to the brush holder 61. A metal bearing 62 may be provided therebetween to support the shaft.

[0057]

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, the rotating brush is provided in a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface, an electric motor for driving the rotating brush, and a battery for driving the electric motor. Since a hollow shaft for passing a conductive wire is attached to one end of the brush holder, an air inlet is provided at the other end of the brush holder, and an opening for discharging cooling air is provided on an outer peripheral surface of the brush holder. Eliminating the conductive wire for supplying power from the cleaner body to the suction tool body, there is no need to wire a conductive wire to the extension tube, and the structure of the extension tube can be simplified and lightened, and the air intake can be further reduced. Intake cooling air from the entrance It makes it possible to increase the cooling efficiency of the motor, it is possible to reduce the temperature rise, the battery can also be cooled simultaneously, it is possible to reduce the temperature rise during discharge.

According to the second aspect of the present invention, a hollow shaft is provided at the other end of the brush holder, and the hollow shaft is used as an air intake, so that a partition wall or the like for taking in air into the brush holder. Is unnecessary, and the structure can be simplified.When the rotating brush is rotated, wind noise is eliminated and noise can be eliminated.Moreover, a large amount of cooling air can flow into the brush holder from the hollow shaft. Can,
The cooling efficiency of the motor and the battery can be increased, and the temperature rise can be reduced.

According to the third aspect of the present invention, since the hollow shaft is fixed to the other end of the brush holder and supported by the bearing, the brush holder is supported by the bearing via the hollow shaft. The rotating brush can be rotatably supported in the main body, and the rotating brush can be stably rotated.

According to the fourth aspect of the present invention, air is taken in from both ends of the brush holder and discharged from the opening provided on the outer peripheral surface, so that when the rotating brush is rotated by the electric motor, A large amount of cooling air can flow into the brush holder from both ends of the brush holder, the cooling efficiency of the electric motor and the battery can be increased, and the temperature rise can be reduced.

According to the fifth aspect of the present invention, since the opening provided on the outer peripheral surface of the brush holder is provided on the hollow shaft side through which the conductive wire passes from the electric motor, when the rotating brush is rotated by the electric motor, When the cooling air that has flowed into the brush holder is discharged from the opening, it always passes through the motor, so that the cooling efficiency of the motor can be increased and the rise in temperature can be reduced.

According to the sixth aspect of the present invention, since the opening provided on the outer peripheral surface of the brush holder is located at a position facing the battery, when the rotating brush is rotated by the electric motor, it is discharged from the opening. The cooling air can cool the battery and reduce the temperature rise when the battery is discharged.The opening communicates with the outside of the brush holder, so that the temperature rise when the battery is charged can be reduced. Can be reduced.

According to the seventh aspect of the present invention, since the dust filter is provided upstream of the air intake, the rotating brush is rotated by the electric motor to cool the cooling air in the brush holder. When flowing in, dust can be prevented from entering the brush holder.

According to the eighth aspect of the present invention, there is provided a vacuum cleaner main body including a dust collecting chamber for collecting dust and dust therein and an electric blower. Since a connection port is provided so as to communicate with the suction device for a vacuum cleaner described above, there is no conductive wire for supplying power from the main body of the vacuum device to the suction device body, thereby simplifying a structure such as an extension pipe. The cooling efficiency of the electric motor of the suction device for a vacuum cleaner can be increased, and the temperature rise can be reduced.

[Brief description of the drawings]

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

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

FIG. 3 is a perspective view of the vacuum cleaner having the vacuum cleaner suction tool.

FIG. 4 is a sectional view of a suction device for a vacuum cleaner according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional vacuum cleaner suction tool.

[Explanation of symbols]

 18 Suction Tool Main Body 19 Rotary Brush 27 Suction Port 28 Brush Holder 29 Brush (Dust Scavenging Part) 30 Electric Motor 31 Battery 36 Conductive Wire 44 Hollow Shaft 50 Air Inlet 52 Opening

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shin Yoshida 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. F-term (reference) 3B006 AA08 3B061 AD11

Claims (8)

[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 motor for rotating the rotating brush and a battery for driving the motor are provided in a substantially cylindrical brush holder provided with a dust scraper, and a hollow shaft for passing a conductive wire is attached to one end of the brush holder. A suction device for an electric vacuum cleaner, wherein an air inlet is provided at the other end of the brush holder, and an opening for discharging cooling air is provided on an outer peripheral surface of the brush holder. 2. A hollow shaft is provided at the other end of the brush holder,
The suction tool for a vacuum cleaner according to claim 1, wherein the hollow shaft is used as an air intake. 3. The suction device for a vacuum cleaner according to claim 2, wherein the hollow shaft is fixed to the other end of the brush holder and is supported by a bearing. 4. The suction tool for a vacuum cleaner according to claim 1, wherein air is taken in from both ends of the brush holder and discharged from an opening provided in an outer peripheral surface. 5. An opening provided on an outer peripheral surface of the brush holder is provided on a hollow shaft side through which a conductive wire passes from an electric motor.
The suction device for an electric vacuum cleaner according to any one of claims 4 to 7. 6. The brush holder according to claim 1, wherein the opening provided on the outer peripheral surface of the brush holder is located at a position facing the battery.
Item 6. A suction device for a vacuum cleaner according to Item 1. 7. The suction tool for a vacuum cleaner according to claim 1, wherein a dustproof filter is disposed upstream of the air intake. 8. A vacuum cleaner main body having a dust collecting chamber for collecting dust and dust therein and an electric blower is communicated with the vacuum cleaner suction tool according to any one of claims 1 to 7. Vacuum cleaner with a connection port to be connected as.