JP2001000371A - Nozzle for vacuum cleaner, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle for a vacuum cleaner silent with low vibration while preventing the locked state of a rotating brush caused by the entry of waste thread and hair. SOLUTION: A rotating brush 19 is rotatably provided in a nozzle body 18 so as to face a suction port 27 opened to the lower face of the nozzle body 18. A hollow shaft 42 of a brush holder 28 is held to the end side of the brush holder 28 of the rotating brush 19, that is, to a cap 53 covering the peripheral surface of a cylindrical body 44a, through a cushioning member 54. The cap 53 is mounted to the nozzle body 18, and a low friction sealing member 58 is provided between the cap 54 and the peripheral surface of the cylindrical body 44a.

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

Further, since the planetary gear 6 has its axis shifted with respect to the rotary brush 2 due to the clearance of the gear, there is a problem that when the electric motor 5 is rotated and the rotary brush 2 is rotated, vibration is generated. Was.

Also, lint and hair wound around the outer peripheral surface of the rotating brush 2 enter the gap between the fixed cover 14 and the rotating brush 2. As the cleaning operation is performed, the winding of the lint and hair increases, and until the gap is filled, the lint and hair wound around the rotating brush 2 are fixed to the suction tool body 1. 14, and the rotation of the rotating brush 2 is hindered. Further, there is a problem that when the winding of lint and hair increases, the rotating brush 2 is finally locked.

An object of the present invention is to solve the above-mentioned conventional problems by reducing vibrations caused by rotating an electric motor and rotating a rotating brush and preventing a locked state due to winding of lint or hair. It is an object.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a suction tool body having a suction port opened on a lower surface;
A rotary brush rotatably provided in the suction tool main body so as to face the suction port, wherein the rotary brush has a substantially cylindrical brush holder provided with a dust scraping portion on an outer peripheral surface,
A cap which is disposed in the brush holder and has a motor for rotating and driving the brush holder; and a cap for covering an end side peripheral surface of the brush holder, the holding part holding the shaft of the brush holder with a buffer material interposed therebetween. And a low-friction seal member provided between the cap and an end-side peripheral surface of the brush holder.

[0015] This makes it possible to reduce the vibration of the suction tool for the vacuum cleaner when the electric motor is rotated to rotate the rotary brush, and also to prevent the rotation of the brush holder from being locked. Can be.

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

Thus, the vibration of the vacuum cleaner when the electric motor is rotated to rotate the rotating brush can be reduced, and the rotation of the brush holder can be prevented from being locked.

[0018]

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 has a substantially cylindrical brush holder provided with a dust scraping part on an outer peripheral surface, and an electric motor arranged in the brush holder and rotating and driving the brush holder, The cap that covers the end side peripheral surface of the brush holder is provided with a holding portion that holds the shaft of the brush holder with a buffer material interposed therebetween, and the cap is attached to the suction tool body, and the cap and the brush holder are attached. A low-friction seal member is provided between the cap and the end peripheral surface of the brush holder to reduce the gap between the cap and the end peripheral surface of the brush holder so that lint and hair can be prevented from entering. thing Since the vibration of the rotating brush can be absorbed by the cushioning material provided on the holding portion, the electric motor can be rotated to reduce the vibration of the suction device for the vacuum cleaner when the rotating brush is rotated. Can be produced and the noise can be reduced.

According to a second 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. Wherein the rotating brush includes a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface, and an electric motor disposed in the brush holder and configured to rotationally drive the brush holder. An annular protruding part is formed on the part side peripheral surface, and a cap covering the peripheral surface of this protruding part has
A holding portion for holding the shaft of the brush holder with a buffer material interposed is provided, and lint and hair wound around the brush holder by the annular protrusion go over the protrusion and the cap and the peripheral surface of the protrusion. And the vibration of the rotating brush can be absorbed by the cushioning material provided in the holding portion, so that the electric motor is rotated, and the vacuum cleaner is rotated when the rotating brush is rotated. The vibration of the suction tool for use can be reduced, and the noise can be reduced.

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. Wherein the rotating brush includes a substantially cylindrical brush holder provided with a dust scraper on an outer peripheral surface, and an electric motor disposed in the brush holder and configured to rotationally drive the brush holder. An annular protruding part is formed on the part side peripheral surface, and a cap covering the peripheral surface of this protruding part has
A brush holder having a holding portion for holding the shaft with a buffer material interposed therebetween, the cap being mounted on the suction tool main body, and a low friction seal member being provided between the cap and the peripheral surface of the protruding portion. In this way, lint and hair can be prevented from climbing over the protrusion and entering the gap between the cap and the periphery of the protrusion.Even if lint or hair does get over the protrusion, the cap and the periphery of the protrusion can be prevented. Since the gap with the surface is made extremely small by the low friction seal member, intrusion of lint and hair can be reliably prevented. In addition, since the vibration of the rotating brush can be absorbed by the cushioning material provided in the holding portion, it is possible to reduce the vibration of the suction device for the vacuum cleaner by rotating the electric motor and rotating the rotating brush. It can be quiet.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the shaft of the brush holder is formed to be hollow. By forming the cooling air flow path,
When the motor is rotated, the motor is cooled to suppress heating of the motor.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a path for introducing outside air into the brush holder through a hollow shaft of the brush holder is formed, Since the filter is disposed in the brush holder, it is possible to remove dust and the like contained in the cooling airflow flowing into the brush holder, thereby preventing the dust and the like from entering the brush holder and causing a failure of the electric motor and the like. . In particular, considering the case where the cooling airflow is taken in from around the suction tool body, dust and the like float around the suction tool body during cleaning, and a cooling airflow containing a large amount of dust flows in, Such a problem can be solved by the above filter.

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

[0024]

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

As shown in FIG. 7, the suction tool main body 18 has a built-in rotary brush 19 (see FIG. 1) for releasing dust adhering to a surface to be cleaned such as a carpet, and a connection connected to an extension pipe 20 at the rear. The body 21 is provided rotatably. Vacuum cleaner body 2
Reference numeral 2 denotes a dust collecting chamber 23 for collecting dust therein and an electric blower 2.
And a connection port 2 provided in the cleaner body 22.
5, a hose 26 connected to the extension pipe 20 is connected, and the connecting body 21 of the suction tool main body 18 is configured to communicate with the connection port 25.

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

The dust scraper may be a thin blade, a strip having a wiping effect (for example, a cloth strip), or a combination of these, as well as 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 the commercial power supply voltage and a noise suppressor are mounted. The motor board 33 is connected to the cleaner body 22 through the connecting body 21. 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 the rotation is transmitted to the brush holder 28 via the reduction gear 31, the rotation speed is set to 3000 rpm to 15000 rpm. When cleaning the carpet, 3000rpm ~ 1
2000 rpm is preferred. The overcurrent prevention device 35 includes a positive temperature coefficient thermistor or the like, and prevents an overcurrent from flowing through the electric motor 30.

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

On the commutator 30a 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. The hollow shaft 42 is made of a material that is hardly deformed, 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. A cover 4 having an inner ring of a bearing 43 fixed to the hollow shaft 42 and an outer ring fixed to an end of the brush holder 28.
4 and the lid 44 prevents the brush 29 from slipping from the end of the brush holder 28 to the left or right.

The gear 32 is made of an industrial plastic such as polyacetal or polyamide, and has 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.

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

The ventilation hole 50 is provided on the outer peripheral surface of the brush holder 28 at a position facing the connecting body 21. A 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.

Further, as shown in FIG.
5 and a bearing support 4 for supporting the bearing 39 of the reduction gear 31
1 are formed adjacent to each other, and hG <hZ when the inner diameter of the tooth bottom of the gear portion 45 is hG and the inner diameter of the bearing support portion 41 is hZ. Further, the inner diameter h of the brush holder 28 other than the gear 45 and the bearing support 41 is larger than the inner diameters hG and hZ of the gear 45 and the bearing support 41.

That is, as shown in FIG. 4B, a first outer mold 28a and a second outer mold 28b forming the outer peripheral surface of the brush holder 28, and a bearing support portion 41 having an inner diameter of hZ.
And a first inner mold 28c forming a gear portion 45 having an inner diameter hG and a second inner mold 28d forming a passage hole 48 having an inner diameter h and a cooling air passage 49. 4
The brush holder 28 shown in FIG.

At one end of the rotating brush 19, a hollow shaft 42 serving as a rotating shaft of the rotating brush 19 is provided.
A cover cover 29b for rotatably holding the rotating shaft 29a is provided on the other end side of the shaft, and a buffer member 54 is provided on the outer periphery of the hollow shaft 42 and the rotating shaft 29a. A holding portion 18 a is formed on the inner surface of one side wall of the suction tool main body 18, and holds the rotating shaft 29 a via a buffer member 54. A holding portion (not shown) is also formed on the inner surface of the side wall in addition to the suction tool main body, and is configured to hold a cap 53 that holds the hollow shaft 42 via a buffer member 54.

The cap 53 is attached so as to cover the outer peripheral surface of the cylindrical body 44a projecting outward from the lid 44, and its shape is shown in FIG. The cap 53 has a circular shape, and the diameter thereof is an annular protrusion 44b of the cylindrical body 44a.
Is set to be about 0.5 mm larger than the outer diameter of. And
A flange 53c is formed on the outer diameter end face of the cap 53,
The flange 53c covers the peripheral surface of the protrusion 44b of the tubular body 44a. Further, a square hole (holding portion) 53b for holding the buffer member 54 is formed at the center of the cap 53, and cut-and-raised pieces 5 are formed above and below the holding portion 53b.
3a and the cut-and-raised piece 53a
By inserting the ribs 8, the cap 53 is held on the suction tool main body 18. The cap may be made of a metal or a synthetic resin, and may have any rigidity. The cushioning member 54 is made of rubber,
Any material may be used as long as it is made of a material having excellent elasticity such as an elastomer, and absorbs vibration and chatter due to rotation of the rotating brush 19 and makes it difficult to transmit the vibration to the suction device main body 18.

FIG. 6 shows another embodiment of the cap 53 and the cylindrical body 44a. As shown in FIG. 3A, a tubular body 44 is provided outside the lid 44 fixed to the end of the brush holder 28.
a, and a cap 53 is attached so as to cover the peripheral surface of the cylindrical body 44a. A gap between the cap 53 and the peripheral surface of the cylindrical body 44a is set to about 0.5 mm, and a low-friction seal member (preferably felt) 58 is provided to fill the gap. Further, as shown in FIG. 3B, an annular protrusion 44b is provided at an end of the cylindrical body 44a, and a cap 53 is provided so as to cover the peripheral surface of the protrusion 44b.
Is similar to that of the embodiment of FIG.
In this embodiment, the gap between the cap 53 and the protruding portion 44b is filled with the low-friction seal member 58, but the one shown in FIG. 3B eliminates the need for the low-friction seal member 58. A filter 56 shown in FIGS. 1 and 6 is for removing dust and the like contained in the cooling air, and is attached so as to close a through hole formed in the buffer member 54 and communicating with the hollow shaft.

Further, a suction hole 55 is provided on the side surface of the suction tool main body 18 facing the hollow shaft 42, and a filter 56 is mounted on the buffer member 54 on the outer periphery of the hollow shaft. And a filter 56 is interposed between them. 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, if the dust raised from the surface to be cleaned is lint or hair, it is entangled around the rotating brush 19. The entangled lint and hair move to the end of the rotating brush 19 when the rotating brush 19 rotates repeatedly, but the end of the brush holder 28 is closed by a lid 44, and the lid 44 has a cylindrical shape. Since the cylindrical body 44a is attached, the peripheral surface of the projection 44b of the cylindrical body 44a is covered with the cap 53, the gap is as small as about 0.5 mm, and the low friction seal member 58 is bent and inserted therebetween. Infiltration of lint and hair is reliably prevented. Also,
As shown in FIG. 6B, an annular protrusion 44 is formed on the cylindrical body 44a.
Just by forming b, the lint or hair that has moved to the end entangled with the rotating brush is prevented from moving by the protrusion 44b, and does not enter the gap between the protrusion 44b and the cap 53. Further, the low friction seal member 58 is provided in the gap between the peripheral surface of the cylindrical body 44a and the cap 53 without forming an annular protrusion on the peripheral surface of the cylindrical body 44a as shown in FIG. And the lint and hair which have been entangled with the rotating brush and moved to the end portion are formed into a cylindrical body 44a and a cap 53.
Can be prevented from penetrating into the gap between them.

In this embodiment, the hollow shaft 42 has been mainly described, but the same mechanism for preventing the lint and hair from being wound around the rotating shaft also provides a mechanism for entangled with the rotating brush so that both ends of the rotating brush can be wound. It is possible to prevent the moving lint or hair from locking the rotating brush. In this case, it is necessary to provide a cap also on the rotating shaft side, but it is not necessary to hold the rotating shaft on the cap via a buffer member,
The rotating shaft may be directly mounted on the suction tool main body via the buffer member. Further, in the present embodiment, the end side peripheral surface of the brush holder 28, that is, the peripheral surface of the cylindrical body 44a of the lid 44 is covered with the cap 53. However, the end itself of the brush holder 28 is extended to The peripheral surface may be covered with a cap.

Further, 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. It is sucked. Then, a negative pressure also acts on the vicinity of the ventilation hole 50 inside the rotating brush 19 through the ventilation hole 50 provided facing the connecting body 21, so that the outside air is
5 flows into the rotating brush 19 through the hollow portion of the hollow shaft 42 through the filter 56 attached to the buffer member 54.

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

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

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

A gear part 45 formed on the inner surface of the brush holder 28 and a bearing support part 41 are formed adjacent to each other.
When the inner diameter of the gear portion 45 is hG and the inner diameter of the brush holder 28 of the bearing support portion 41 is hZ, hG <hZ, so that the electric motor 30, the speed reducer 31, and the gear 32 are integrated. When the connected structure is incorporated into the brush holder 28, the brush holder 28 can be easily incorporated. The gear unit 45 connected to the gear 32 and the bearing unit 39 of the reduction gear 31 are supported on the inner surface of the brush holder 28. The bearing support portion 41 to be formed can be easily formed by resin molding.

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

The gear 32 has a gear portion 45 formed on the inner surface of the brush holder 28 at a substantially central portion in the axial direction.
When the electric motor 30 is rotated, the brush holder 28 is driven at a substantially central portion in the axial direction. When the electric motor 30 drives the brush holder 28, the left and right ends of the brush holder 28 are rotated. Although the portion tends to oscillate, the oscillation at both ends of the brush holder 28 is substantially uniform and minimized, so that the vibration and noise at both ends of the brush holder 28 can be reduced and the noise can be reduced.

Since the end of the rotary brush 19 is held by the buffer member 54 in the cap 53 formed on the suction tool main body 18, the vibration caused by the rotation of the rotary brush 19 is absorbed by the buffer member 54. Thus, vibration when the rotating brush 19 is rotated can be reduced, and noise can be reduced.

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

[0054]

As described above, according to the present invention, it is possible to prevent the lock state due to the winding of lint and hair when the rotating brush is rotated, and to reduce the vibration of the suction tool for a vacuum cleaner. It can be quiet.

Further, when the shaft of the brush holder is formed to be hollow, the motor can be cooled and overheating of the motor can be suppressed.

Further, by installing the filter, it is possible to prevent cooling air containing dust and the like from entering the brush holder, thereby improving the reliability of the device.

[Brief description of the drawings]

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

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

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

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

FIG. 5A is a sectional view of the cap of the vacuum cleaner suction tool. FIG. 5B is a front view of the cap of the vacuum cleaner suction tool.

FIG. 6A is an enlarged side sectional view of a main part of the vacuum cleaner suction tool. FIG. 6B is an enlarged side sectional view of a main part of the vacuum cleaner suction tool.

FIG. 7 is a perspective view of the vacuum cleaner having the vacuum cleaner suction tool.

FIG. 8 is a cross-sectional view of a conventional suction device for a vacuum cleaner.

[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 Reduction Gear 32 Gear (Power Transmission Device) 44 Cover 53 Cap 54 Buffer Material 56 Filter 58 Low Friction Seal Member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Fujita 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor: Shin Yoshida 1006 Kadoma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 3B061 AD17 AE02 AE13

Claims (6)

[Claims] 1. A suction tool main body having a suction port opened on a lower surface, and a rotating brush rotatably provided in the suction tool body so as to face the suction port, wherein the rotary brush has an outer peripheral surface. A substantially cylindrical brush holder provided with a dust scraper, and an electric motor disposed in the brush holder and rotating the brush holder, the cap covering an end side peripheral surface of the brush holder, Along with providing a holding part for holding the brush holder shaft with buffer material interposed,
A suction tool for a vacuum cleaner, wherein the cap is attached to the suction tool body, and a low-friction seal member is provided between the cap and an end surface of the brush holder. 2. 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. A substantially cylindrical brush holder provided with a dust scraper, and an electric motor disposed in the brush holder and driving the brush holder to rotate, an annular protrusion on an end side peripheral surface of the brush holder. A suction tool for a vacuum cleaner, wherein a cap for covering the peripheral surface of the projection is provided with a holding portion for holding the shaft of the brush holder with a buffer material interposed therebetween. 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 substantially cylindrical brush holder provided with a dust scraper, and an electric motor disposed in the brush holder and driving the brush holder to rotate, an annular protrusion on an end side peripheral surface of the brush holder. The cap that covers the peripheral surface of the protrusion is provided with a holding portion that holds the shaft of the brush holder with a buffer material interposed therebetween, and the cap is attached to the suction tool main body, and the cap and the cap are attached. A suction device for a vacuum cleaner having a low-friction seal member provided between the protrusion and the peripheral surface of the protrusion. 4. The suction tool for a vacuum cleaner according to claim 1, wherein a shaft of the brush holder is formed hollow. 5. The suction tool for a vacuum cleaner according to claim 4, wherein a path for introducing outside air into the brush holder is formed through a hollow shaft of the brush holder, and a filter is provided in the middle of the path. 6. A vacuum cleaner body provided with a dust collection chamber and an electric blower for collecting dust therein so as to communicate with the vacuum cleaner suction tool according to any one of claims 1 to 5. Vacuum cleaner with a connection port to be connected to.