JP2000245662A - Suction tool for vacuum cleaner, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction tool for vacuum cleaner capable of reducing the temperature rise of an electric motor for driving a rotary brush, and to provide a vacuum cleaner using the suction tool. SOLUTION: The rotary brush 19 is freely rotatably provided inside a 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. For the rotary brush 19, the electric motor 30 for rotationally driving the rotary brush 19 is provided inside an almost cylindrical brush holder 28 provided with brushes 29 on an outer peripheral surface and the electric motor 30 is cooled by the route of sucking air from the end face of the brush holder 28 and discharging it from the ventilation hole 50 of the outer peripheral surface. The rotating directions of the rotary brush 19 and the electric motor 30 are made equal to each other.

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, only the cooling air is flowed around the electric motor 5, and the cooling structure for sufficiently cooling the electric motor 5 is not provided.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to increase the cooling efficiency of an electric motor built in a rotating brush and reduce a rise in temperature.

[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 is provided with an electric motor for rotating and driving the rotating brush inside a substantially cylindrical brush holder provided with a dust scraping portion on the outer peripheral surface, and sucks air from an end surface of the brush holder and exhausts air from a ventilation hole on the outer peripheral surface. It is configured to cool the motor in the path, and the rotating direction of the rotating brush and the motor is the same direction, and when the rotating brush is rotated by rotating the motor built in the rotating brush, the cooling air that cools the motor is cooled. The air volume can be increased, and the temperature rise can be reduced.

A rotary brush is rotatably provided in the suction tool main body so as to face a suction port opened on the lower surface of the suction tool main body, and the rotary brush is provided with a dust scraping portion on an outer peripheral surface thereof. Inside the cylindrical brush holder, an electric motor for driving the rotating brush is provided, and the electric motor is configured to cool the electric motor through a path that takes in air from the end face of the brush holder and exhausts air from the ventilation hole on the outer peripheral surface. A seal part that separates the outer peripheral space of the motor from the ventilation hole is provided.When the rotating brush is rotated by rotating the motor built in the rotating brush, the amount of cooling air that cools the inside of the motor can be increased. Temperature rise can be reduced.

[0015] Further, a vacuum cleaner main body having a dust collecting chamber for collecting dust therein and an electric blower is provided with a connection port connected to communicate with the vacuum cleaner suction tool. When the rotating brush is rotated by rotating the electric motor of the vacuum cleaner suction tool, the amount of cooling air for cooling the motor can be increased, and the temperature rise can be reduced to reduce the electric motor of the vacuum cleaner suction tool. Can be downsized.

[0016]

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, the rotating brush having a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface thereof, and an electric motor for rotating the rotating brush, wherein the electric motor is provided inside the brush holder. The motor is configured to cool the motor in a path that takes in air from an end face of the brush holder and exhausts air from an air hole in an outer peripheral surface, and the rotating direction of the rotating brush and the motor is the same. When the built-in motor is rotated to rotate the rotating brush, the rotating speed of the motor is higher than the rotating speed of the rotating brush, and the rotating direction of the rotating brush and the motor is the same, so that the rotating brush passes through the rotating brush. Cooling air can be accelerated by the same rotational direction of the wind generated by the rotation of the motor, it is possible to increase the amount of cooling air for cooling the electric motor, it is possible to reduce the temperature rise.

According to a second aspect of the present invention, in the first aspect of the present invention, the motor is provided with an opening for discharging cooling air for cooling the inside of the motor, and the opening for discharging cooling air to the motor is provided. By providing the section, it is possible to cool the electric motor by passing the cooling air passing through the inside of the rotating brush through the electric motor, thereby reducing the temperature rise and reducing the size of the electric motor.

According to a third aspect of the present invention, there is provided 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.
The rotary brush has a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface thereof, and an electric motor for driving the rotary brush to rotate. The electric motor is provided inside the brush holder, and the brush holder A configuration is adopted in which the motor is cooled in a path that takes in air from the end face of the motor and exhausts air from the vent holes on the outer circumferential surface, and at least one of the outer circumference of the motor and the inner circumference of the brush holder has a projection that narrows the outer circumferential space of the motor. The cooling air passing through the rotating brush passes through the outer peripheral space of the motor and the inside of the motor to cool the motor, but passes through the motor by narrowing the outer peripheral space of the motor by the convex portion. The amount of cooling air can be increased, and the electric motor can be efficiently cooled.

According to a fourth aspect of the present invention, there is provided 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.
The rotary brush has a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface thereof, and an electric motor for driving the rotary brush to rotate. The electric motor is provided inside the brush holder, and the brush holder A configuration in which the motor is cooled in a path that takes in air from an end face of the motor and exhausts air from a ventilation hole on an outer peripheral surface, and a seal portion that partitions an outer peripheral space of the motor and the ventilation hole is provided on an outer periphery of the motor. All the cooling air passing through the rotating brush passes through the electric motor by the seal portion, so that the amount of cooling air passing through the electric motor can be increased and the electric motor can be efficiently cooled.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the seal portion is constituted by an annular seal member, and all the cooling air passing through the rotary brush is supplied to the electric motor by the annular seal member. Can be passed, and the configuration of the seal portion can be simplified and the cost can be reduced.

According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the seal portion has a labyrinth structure, and the seal portion can be formed in a non-contact manner.
Contact loss between the rotating brush and the cooling brush passing through the rotating brush can be entirely passed through the electric motor.

The invention described in claim 7 is the above-mentioned claim 1 to claim 1.
In the invention described in 6, a power transmission device for transmitting rotation of the electric motor to the brush holder is provided in the brush holder,
The ventilation hole is provided on the side opposite to the electric motor from the power transmission device.Because the power transmission device is interposed between the ventilation hole and the electric motor, the distance between the ventilation hole and the electric motor becomes longer, which is generated by the rotation of the rotating brush. Discharge of the generated static electricity toward the motor can be suppressed.

[0023] The invention described in claim 8 is the above-mentioned claim 1-
In the invention described in 7, a power transmission device for transmitting rotation of the electric motor to the brush holder is provided in the brush holder,
A gear portion connected to a gear of a power transmission device is formed on the inner surface of the brush holder so as to protrude, and a cooling air passage for cooling the electric motor is formed in the gear portion. By passing the wind through the passage formed in the gear portion, the electric motor can be cooled and the temperature rise of the electric motor can be reduced.

According to the ninth aspect of the present invention, there is provided the first aspect of the present invention.
7. The invention according to 7, wherein a speed reducer for reducing the rotation of the electric motor is provided in the brush holder, and a bearing support portion for supporting a bearing provided on the speed reducer is formed on an inner surface of the brush holder so as to protrude therefrom. A cooling air passage for cooling the motor is formed in the bearing support. The cooling air sucked from the end face of the brush holder is passed through the passage formed in the bearing support to cool the motor. Temperature rise can be reduced.

According to a tenth aspect of the present invention, there is provided an electric vacuum cleaner having a dust collecting chamber for collecting dust and dust therein and an electric blower, wherein the electric vacuum cleaner according to any one of the first to ninth aspects is provided. With a connection port that is connected to communicate with the suction device for the vacuum cleaner, when the motor of the suction device for the vacuum cleaner is rotated and the rotating brush is rotated, the amount of cooling air that cools the motor is increased. Temperature rise can be reduced.

[0026]

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

(Embodiment 1) As shown in FIG. 4, 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 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, and the like are mounted. Connected lead wire 34
And is configured to be driven by a rectified voltage of the commercial power supply voltage. Further, openings 30a and 30b for taking in cooling air for cooling the inside of the motor 30 and openings 30c for discharging are provided.

Here, the rotation direction of the electric motor 30 is the same as the rotation direction of the rotating brush, and the rotation speed is set to 3000 rpm to 15000 rpm because the rotation is transmitted to the brush holder 28 via the reduction gear 31. ing. When cleaning a carpet, 3000 rpm to 12000 rpm is preferable. 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 motor 30 to reduce the rotation speed of the 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 electric motor 30 and the reduction gear 31 are integrally formed and fixed to the electric motor 30 via the sound insulation tube 37, and the gear 32 is fitted to the output shaft 38. The bearing portion 39 is provided with the speed reducer 31 integrally formed with the electric motor 30 and the brush holder 2.
8, the inner ring is a small diameter portion 40 of the reduction gear 31
, And the outer ring is supported by a bearing support portion 41 formed to protrude from the inner surface of the brush holder 28.

On the commutator 30d side of the motor 30, a hollow shaft 42 having a hollow inner diameter and supporting the motor 30 integrally formed with the reduction gear 31 is fixed. This hollow shaft 42
Made of hardly deformable material such as aluminum alloy, carbon steel (S45C), industrial plastic, etc.
It is configured so that cooling air can be introduced smoothly. 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 an industrial plastic such as polyacetal or polyamide, and a gear 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.

The gear portion 45 is formed so as to protrude from the inner surface of the brush holder 28 at a substantially central portion in the axial direction, and connects the gear 32 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.
Is connected to a cooling air passage (outer peripheral space) 49a passing from the hollow shaft 42 to the outside of the electric motor 30 and a cooling air passage 49b passing to the outside of the reduction gear 31.
8 communicates with a vent hole 50 provided in the same.

The convex portion 28a is provided on the inner peripheral portion of the brush holder 28, narrows the cooling air passage (outer peripheral space) 49a passing outside the electric motor 30, reduces the cooling air passing through the cooling air passage 49a, and This is to increase the cooling air passing through. In the present embodiment, the protrusion 28a is provided on the inner periphery of the brush holder 28, but may be provided on the outer periphery of the electric motor 30, or the inner periphery of the brush holder 28 and the electric motor 3 may be provided.
0 may be provided on both sides.

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 dustproof 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.

A holding portion 53 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 by the holding portion 53 with a buffer member 54 interposed therebetween. 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 is rotated, decelerated by the speed reduction device 31, and the rotation torque is increased to increase the rotation. 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 the outside air flows in from the outer periphery of the suction device main body 18, and the dust on the floor surface is also passed through the connecting body 21 by this air flow. 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 inflowing outside air passes through the inside of the electric motor 30, the cooling air passages 49 a and 49 b passing through the outside of the electric motor 30 and the reduction gear 31, and the passage hole 48 provided outside the gear portion 45, and passes through the dustproof filter 51. As a result, cooling air flowing out of the ventilation hole 50 is generated, and the motor 30 and the motor substrate 3
Cool 3 etc.

Here, since the rotating direction of the rotating brush 19 and the electric motor 30 is the same direction, the rotating speed of the electric motor 30 is higher than the rotating speed of the rotating brush 19, and the rotating direction of the rotating brush 19 and the electric motor 30 is the same direction. Therefore, the cooling air passing through the rotating brush 19 can be accelerated by the wind in the same rotation direction generated by the rotation of the electric motor 30, so that the amount of cooling air for cooling the electric motor 30 can be increased, The temperature rise can be reduced, and the size of the electric motor 30 can be reduced.

Since the motor 30 is provided with openings 30a and 30b for taking in cooling air for cooling the inside of the motor 30 and an opening 30c for discharging the cooling air, the cooling air passing through the rotating brush 19 passes through the inside of the motor 30, 30 can be cooled, the temperature rise can be reduced, and the electric motor 30 can be downsized.

Further, the cooling air passing through the rotating brush 19 passes through the cooling air passage 49 on the inner surface of the brush holder 28 and the inside of the electric motor 30 to cool the electric motor 30, but the inner peripheral surface of the brush holder 28 is cooled. The cooling air passage (outer peripheral space) 49a passing outside the electric motor 30 is narrowed by providing a convex portion 28a on the surface of the electric motor 30, so that the amount of cooling air passing through the electric motor 30 can be increased, and the electric motor 30 is efficiently cooled. be able to.

A gear portion 45 connected to the gear 32 is formed on the inner surface of the brush holder 28 so as to protrude, and a cooling air passage hole 48 for cooling the electric motor 30 is provided outside the gear portion 45.
The cooling air sucked from the end face of the brush holder 28 is passed through the passage hole 48 so that the electric motor 3
0 can be cooled, and the temperature rise of the electric motor 30 can be reduced.

Further, since the bearing support 41 is formed so as to protrude from the inner surface of the brush holder 28, and the cooling air passage 49b for cooling air for cooling the electric motor 30 is formed outside the bearing support 41, the brush is provided. The electric motor 30 can be cooled by the cooling air sucked from the end face of the holder 28,
The temperature rise of the electric motor 30 can be reduced.

Further, since the vent hole 50 is provided on the side opposite to the motor with respect to the gear 32, the gear 32 is interposed between the vent hole 50 and the motor 30, so that the distance between the vent hole 50 and the motor 30 is long. Thus, the discharge of static electricity generated by the rotation of the rotating brush 19 toward the electric motor 30 can be suppressed.

(Embodiment 2) As shown in FIG. 5, an annular seal member 58 is provided on the outer periphery of the electric motor 30 to partition a cooling air passage (outer peripheral space) 49a formed on the outer periphery of the electric motor 30 from the ventilation hole 50. It is configured as follows. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. In addition,
The dust is scraped up by the suction tool body 18 and the
Operation of the rotating brush 19 through the suction hole 55
The operation of cooling the electric motor 30, the electric motor substrate 33, and the like by the cooling air flowing into the inside of the inside and flowing out of the vent hole 50 is the same as the operation of the first embodiment, and therefore the description thereof is omitted.

The cooling air flowing into the rotary brush 19 enters the cooling air passage 49a passing outside the electric motor 30, passes through the cooling air passage 49b and the passage hole 48, and flows out of the ventilation hole 50. Since the cooling air passing through the rotating brush 19 is entirely passed through the electric motor 30 by the annular seal member 58, the cooling air passing through the rotary brush 19 is separated from the ventilation hole 49 a by the annular sealing member 58 provided on the outer periphery of the electric motor 30. Thus, the amount of cooling air passing through the motor 30 can be increased, and the motor 30 can be efficiently cooled.

In this embodiment, an annular seal member 58 is provided on the outer periphery of the electric motor 30 to partition the cooling air passage 49a formed on the outer periphery of the electric motor 30 from the ventilation hole 50. Instead of the member 58, a seal portion having a labyrinth structure may be provided. In this case,
The sealing portion can be configured in a non-contact manner.
9 can be eliminated, and the cooling air passing through the rotating brush 19 can be passed through the electric motor 30.

[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 rotating brush provided freely, the rotating brush has a substantially cylindrical brush holder provided with a dust scraping portion on an outer peripheral surface, and an electric motor that rotationally drives the rotating brush, the electric motor comprising: Provided inside the brush holder, configured to cool the motor in a path that sucks in from the end face of the brush holder and exhausts from the vent on the outer peripheral surface, since the rotating direction of the rotating brush and the motor is the same direction, The cooling air passing through the rotating brush can be accelerated by the wind in the same rotation direction generated by the rotation of the electric motor, so that the amount of cooling air for cooling the electric motor can be increased and the temperature rise can be reduced. Can.

According to the second aspect of the present invention, since the motor is provided with the opening for discharging the cooling air for cooling the inside of the motor, the cooling air passing through the rotating brush is cooled through the motor to cool the motor. Thus, the temperature rise can be reduced and the motor can be made smaller.

According to the third aspect of the present invention, there is provided 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. The rotating brush has a substantially cylindrical brush holder provided with a dust scraping part on the outer peripheral surface, and an electric motor that rotationally drives the rotating brush, and the electric motor is provided inside the brush holder, The motor is configured to be cooled through a path that draws in air from an end face of the brush holder and exhausts air from a vent hole on an outer circumferential surface, and narrows an outer circumferential space of the motor to at least one of the outer circumference of the motor and the inner circumference of the brush holder. Since the convex portion is provided, the amount of cooling air passing through the motor can be increased by narrowing the outer peripheral space of the motor by the convex portion, and the motor can be efficiently cooled. That.

According to the fourth aspect of the present invention, there is provided a suction tool main body having a suction port opened on the lower surface, and a rotary brush rotatably provided in the suction tool main body so as to face the suction port. The rotating brush has a substantially cylindrical brush holder provided with a dust scraping part on the outer peripheral surface, and an electric motor that rotationally drives the rotating brush, and the electric motor is provided inside the brush holder, The configuration is such that the motor is cooled in a path that takes in air from the end face of the brush holder and exhausts air from the ventilation hole on the outer peripheral surface, and a seal portion that partitions the outer peripheral space of the motor and the ventilation hole is provided on the outer periphery of the motor. All of the cooling air passing through the rotating brush passes through the electric motor by the seal portion, so that the amount of cooling air passing through the electric motor can be increased, thereby efficiently cooling the electric motor. Door can be.

According to the fifth aspect of the present invention, since the seal portion is constituted by the annular seal member, all the cooling air passing through the rotary brush can be passed through the electric motor by the annular seal member. In addition, the configuration of the seal portion can be simplified, and the cost can be reduced.

According to the sixth aspect of the present invention, since the seal portion has a labyrinth structure, the seal portion can be formed in a non-contact manner, and the contact loss between the rotary brush and the rotary brush can be eliminated. And all the cooling air passing through the rotating brush can be passed through the electric motor.

According to the seventh aspect of the present invention, the power transmission device for transmitting the rotation of the motor to the brush holder is provided in the brush holder, and the ventilation hole is provided on the side opposite to the motor from the power transmission device. Since the power transmission device is interposed between the air hole and the electric motor, the distance between the air hole and the electric motor is increased, and the discharge of static electricity generated by the rotation of the rotating brush to the electric motor side can be suppressed.

According to the present invention, a power transmission device for transmitting the rotation of the electric motor to the brush holder is provided in the brush holder, and the inner surface of the brush holder is connected to the gear of the power transmission device. Since the gear portion is formed so as to protrude, and a cooling air passage for cooling the electric motor is formed in the gear portion, the cooling air sucked from the end face of the brush holder passes through the passage formed in the gear portion to cool the electric motor. The temperature rise of the electric motor can be reduced.

According to the ninth aspect of the present invention, a reduction gear for reducing the rotation of the electric motor is provided in the brush holder, and a bearing support for supporting the bearing provided on the reduction gear on the inner surface of the brush holder. The projecting portion is formed, and a cooling air passage for cooling the electric motor is formed in the bearing support portion.By passing the cooling air sucked from the end face of the brush holder through the passage formed in the bearing support portion, the electric motor is formed. The cooling can be performed, and the temperature rise of the electric motor can be reduced.

According to the tenth aspect of the present invention,
A vacuum cleaner main body including a dust collecting chamber and an electric blower for collecting dust and dust therein is connected to communicate with the vacuum cleaner suction tool according to any one of claims 1 to 9. Since the connection port is provided, when the rotating brush is rotated by rotating the electric motor of the suction device for a vacuum cleaner, the amount of cooling air for cooling the electric motor can be increased, and a rise in temperature 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 the vacuum cleaner.

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

FIG. 4 is a perspective view of the vacuum cleaner having the vacuum cleaner suction tool.

FIG. 5 is a cross-sectional view of a rotating brush of a suction tool for a vacuum cleaner according to a second embodiment of the present invention.

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

[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 motor 50 vent

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Fujita 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Seizo Hayashi 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 3B061 AD05 AE02 AH02

Claims (10)

[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 brush holder having a substantially cylindrical shape provided with a dust scraper, and a motor for driving the rotary brush to rotate; the motor is provided inside the brush holder, air is sucked from an end face of the brush holder, and an outer peripheral surface is provided. A suction device for a vacuum cleaner, wherein the motor is configured to be cooled in a path exhausted from a vent hole, and the rotating direction of the rotating brush and the motor is the same. 2. The suction tool for a vacuum cleaner according to claim 1, wherein an opening for discharging cooling air for cooling the inside of the motor is provided in the motor. 3. A suction tool main body having a suction port opened on a lower surface thereof, and a rotary brush rotatably provided in the suction tool main body so as to face the suction port. A brush holder having a substantially cylindrical shape provided with a dust scraper, and a motor for driving the rotary brush to rotate; the motor is provided inside the brush holder, air is sucked from an end face of the brush holder, and an outer peripheral surface is provided. The suction device for a vacuum cleaner, wherein the suction device is configured to cool the electric motor through a path exhausted from the vent hole, and at least one of an outer periphery of the electric motor and an inner periphery of the brush holder is provided with a convex portion for narrowing an outer peripheral space of the electric motor. . 4. A suction tool main 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, wherein the rotary brush has an outer peripheral surface. A brush holder having a substantially cylindrical shape provided with a dust scraper, and a motor for driving the rotary brush to rotate; the motor is provided inside the brush holder, air is sucked from an end face of the brush holder, and an outer peripheral surface is provided. A suction device for a vacuum cleaner, wherein the motor is configured to be cooled by a path exhausted from a vent hole, and a seal portion is provided on an outer periphery of the motor to partition an outer peripheral space of the motor and the vent hole. 5. The suction tool for a vacuum cleaner according to claim 4, wherein the seal portion is formed by an annular seal member. 6. The suction tool for a vacuum cleaner according to claim 4, wherein the seal portion has a labyrinth structure. 7. A power transmission device for transmitting rotation of an electric motor to a brush holder is provided in the brush holder, and a ventilation hole is provided in the brush holder.
The suction tool for a vacuum cleaner according to any one of claims 1 to 6, wherein the suction tool is provided on a side opposite to the electric motor with respect to the power transmission device. 8. A power transmission device for transmitting rotation of an electric motor to a brush holder is provided in the brush holder, and a gear portion connected to a gear of the power transmission device is formed on an inner surface of the brush holder so as to protrude. The suction tool for a vacuum cleaner according to any one of claims 1 to 7, wherein a cooling air passage for cooling the electric motor is formed in the portion. 9. A reduction gear for reducing the rotation of the electric motor is provided in the brush holder, and a bearing support for supporting a bearing provided on the reduction gear is formed on an inner surface of the brush holder so as to protrude therefrom. The suction tool for a vacuum cleaner according to any one of claims 1 to 7, wherein a cooling air passage for cooling the electric motor is formed in the portion. 10. 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 9. Vacuum cleaner with a connection port to be connected as.