JP2001137161A - Rotating brush equipment for electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating brush equipment for electric vacuum cleaner that can correspond to the change in planning including design at a low cost. SOLUTION: A plural number of rotor pieces 2a, 2b, and 2c are connected in the axial direction by concavity and convexity fitting mechanism forming one rotating brush 2. A shaft 3 is transfixed in the cylindrical void formed by connecting an idle pulley 6 equipped with the rotating brush body 2 and a roller bearing 5 with a pair of supporting member 10, 10 equipped with the rotating brush 8 and a roller bearing 9, and fixed with a nut 12 together with a washer 11 on both ends of the shaft 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary brush device mounted on a vacuum cleaner.

[0002]

2. Description of the Related Art FIG. 10 is a side sectional view of an example of an upright type vacuum cleaner. Upright type vacuum cleaner 1
00 is a main body 101 having a dust collecting chamber 104 formed therein.
And a handle portion 102 fixed to the upper portion of the main body 101 for moving the cleaner 100, and a nozzle portion 103 rotatably supported below the main body 101.
A suction port 105 for sucking dust is formed in the front bottom surface of the nozzle section 103.
The rotary brush device 1 is rotatably supported by the nozzle portion 103 so as to face the external space from the nozzle 05.

An electric blower 107 for generating a suction airflow for dust suction is provided inside a motor cover 106 formed behind the nozzle portion 103, and a motor shaft 108 and the rotary brush device are provided. A belt 109 is suspended between the belt 1 and the belt. Therefore,
The motor shaft 108 rotates with the driving of the electric blower 107, and the rotation is transmitted to the rotary brush device 1 via the belt 109, and the rotation of the rotary brush device 1 scrapes out dust on the floor surface and sucks the dust together with the suction airflow. be able to. In addition, inside the nozzle part 103,
An air introduction pipe 110 serving as a path for the air sucked in with the dust is formed.

[0004] One end of the dust collecting chamber 111 is connected to the outlet of the air introduction pipe 110 and the other end is connected to the dust collecting chamber 1.
The hose is connected to the entrance of No. 04. An exhaust port (not shown) for exhausting the air introduced into the dust collection chamber 104 to an external space is provided on the rear surface of the main body 101. Therefore, the suction port 105 and the air introduction pipe 11
0, the hose 111, the dust collecting chamber 104 and the exhaust port,
In this order, a communicating air flow path from intake of air to exhaust is formed. Reference numeral 112 denotes a dust collection bag that is detachably attached to the inside of the dust collection chamber 104 to filter and collect dust such as dust.

FIG. 11 is a partial sectional view of an example of a conventional rotary brush device of an upright type vacuum cleaner. As shown in FIG. 11, the rotary brush device 1 includes a cylindrical rotary brush body 2, a shaft 3 inserted in the axial direction of the rotary brush body 2, and a main body formed integrally with the rotary brush body 2. A pulley 4, an idle pulley 6 that is rotatable with respect to the shaft 3 via a bearing 5, and is provided adjacent to the main pulley 4. 7, a brush rotor 8 fixed to the shaft 3, a bearing 9, both ends of the shaft 3 are inserted, a washer 11 and a nut 12
Thus, the supporting member 10 is fixed from both sides. Reference numeral 13 denotes a pin for fixing the rotating brush body 2 at an appropriate position on the shaft 3.

Further, referring to the detailed structure of the rotary brush body 2, the outer peripheral portion of the rotary brush body 2 projects with a certain thickness and maintains a predetermined phase difference (180 ° in this figure). A pair of spirally surrounding brush bases 14 and 14 are formed.
A plurality of bundling brushes 15,
.. Are applied at predetermined intervals by flocking or the like.

[0007] The rotating brush device 1 having the above configuration is
It is attached to a predetermined position of the nozzle portion 103 (see FIG. 10) by the support member 10. And the belt 10
Reference numeral 9 is suspended from one of the main pulley 4 and the idle pulley 6, and switches the suspension as needed. That is, when the floor surface to be cleaned is not a flat surface such as carpet, dust may be buried in the hair of the carpet. In such a case, by suspending the belt 109 toward the main pulley 4, the motor shaft 10 associated with the drive of the electric blower 107 is driven.
The rotation of No. 8 is transmitted to the rotating brush body 2 via the belt 109, and the rotating brush body 2 is rotated to suck out dust while scraping out dust. As a result, even the dust buried in the hair of the carpet can be reliably scraped and the floor surface can be efficiently cleaned.

On the other hand, if the floor surface to be cleaned is a hard and flat surface such as a flooring or a tile, the cleaning is performed while rotating the rotating brush body 2 as described above. The contact between the body 2 and the floor causes friction, which may hinder smooth movement of the nozzle portion 103. Therefore, in such a case, the suspension of the belt 109 is switched to the idle pulley 6 to cause the idle pulley 6 to idle with the outer ring of the bearing 5 to stop the rotation of the rotary brush body 2. Thus, the floor surface can be efficiently and sufficiently cleaned only by the suction airflow generated by driving the electric blower 107.

[0009]

In such a conventional rotary brush device 1, in particular, the rotary brush body 2 has a complicated structure. A new mold had to be manufactured, which hindered cost reduction. Further, conventionally, since the idle pulley 6 and the outer ring of the bearing 5 are fixed to each other by bonding, the bonding may be separated and rubbed due to a difference in the coefficient of thermal expansion between the two, which may cause an annoying abnormal sound such as rattling. there were.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a rotary brush device of an electric vacuum cleaner which can flexibly cope with a design change including a design at a low cost. Another object of the present invention is to provide a rotary brush device of a vacuum cleaner that can perform comfortable cleaning while preventing abnormal noise generated from the rotary brush device during cleaning.

[0011]

In order to achieve the above object, according to the present invention, there is provided a rotary brush for a vacuum cleaner, wherein a rotary brush body is provided in the nozzle portion so as to face an external space from a dust suction port of the nozzle portion. In the apparatus, the rotating brush body is characterized in that a plurality of rotor pieces having brushes on a surface are connected in an axial direction.

Further, according to the present invention, a rotary brush body facing an external space from a dust suction port of a nozzle portion, and a rotary shaft inserted in the axial direction of the rotary brush body and rotatably supported by the nozzle portion. And a main pulley fixed to the rotating shaft, wherein the rotation of the rotary brush body is rotated by transmitting the rotation of a motor mounted on the nozzle portion to the main pulley via a belt. The rotating brush device of the machine is characterized in that the rotating brush body is formed by connecting a plurality of rotor pieces having brushes on the surface in an axial direction.

Further, according to the present invention, a rotary brush body facing the external space from the dust suction port of the nozzle portion, and a rotary shaft inserted in the axial direction of the rotary brush body and rotatably supported by the nozzle portion. And a main pulley fixed to the rotating shaft, and an idle pulley rotatable independently of the rotating shaft via a bearing with respect to the rotating shaft, and provided adjacent to the main pulley. A rotary brush device for a vacuum cleaner, wherein the rotation of the rotary brush body is switched between rotation and stop by transmitting rotation of a motor mounted on the nozzle portion to the main pulley or the idle pulley via a belt. The rotary brush body is characterized in that a plurality of rotor pieces having brushes on the surface are connected in the axial direction.

According to these configurations, by increasing or decreasing the number of rotor pieces coupled in the axial direction, various rotating brush bodies having different designs and dimensions can be easily manufactured.

If the rotary shaft is attached to the nozzle by a support member having bearings rotatably supporting both ends of the rotary shaft, the rotary brush device can be easily fixed to the nozzle.

Further, in the present invention, the rotary brush body facing the external space from the dust suction port of the nozzle portion, and the rotary shaft inserted in the axial direction of the rotary brush body and rotatably supported by the nozzle portion. A main pulley fixed to the rotating shaft, an idle pulley rotatable independently of the rotating shaft via a bearing with respect to the rotating shaft, and provided adjacent to the main pulley; A brush rotor fixed to an inner ring of the bearing, and a support member inserted into both ends of the rotating shaft via a bearing and attached to the nozzle portion, and a motor mounted on the nozzle portion is rotated by a belt. A rotary brush device for a vacuum cleaner, which switches between rotation and stop of the rotary brush body by transmitting the rotation to the main pulley or the idle pulley via Brush body is characterized in being configured by combining a plurality of rotor pieces having a brush on the surface in the axial direction.

In this case, a portion having a predetermined length from both ends of the rotary shaft is provided with a relatively large portion having a large inner outer diameter and a relatively small portion having a relatively small outer diameter. The brush rotor, the idle pulley, the main pulley, and the rotary brush body are fixed from both sides of the relatively large outer diameter portion of the rotating shaft, and are fixed to the relatively small outer diameter portion. When the support member is fixed so as to be pressed against the step, displacement of each member in the axial direction is prevented, and these can be stably and reliably fixed to the rotating shaft.

The main pulley and one of the plurality of rotor pieces may be integrally formed. In this case, the number of parts is reduced, and the assembly process of the rotating brush device is simplified.

When the idle pulley is formed of two separable members for holding the bearing, the idle pulley can be separated as required to easily remove the bearing.

Further, when the support member is formed of two separable members that sandwich the bearing, the bearing can be easily removed by separating the support member as needed.

Further, if the plurality of rotor pieces are separably connected, they can be separated and separated one by one as needed. Incidentally, such coupling between the rotor pieces can be easily realized by the concave-convex fitting mechanism.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> A first embodiment of the present invention
An embodiment will be described with reference to the drawings. FIG.
It is a fragmentary sectional view of the rotary brush device of the vacuum cleaner concerning this embodiment. The rotating brush device according to the present embodiment is shown in FIG.
1 is different from the conventional rotary brush device shown in FIG. 1 only in the local structure, and common members are denoted by the same reference numerals, and detailed description thereof will be omitted.

The unique configuration of the rotary brush device 1 according to this embodiment will be described. A plurality (three in FIG. 1) of rotor pieces 2a, 2b,
2c. As shown in FIG. 2, a protrusion 16 and a recess 17 that fits with the protrusion 16 at a position corresponding to the protrusion 16 are formed at the joint of the rotor pieces 2 a, 2 b, and 2 c. Multiple locations (Figure 2
In six places).

That is, as shown in FIG. 1, the left rotor piece 2a is formed integrally with the main pulley 4, and the right end thereof is provided with the convex portion 16 and the concave portion 17, and the central rotor piece 2b is provided at both ends. Are provided with the convex portions 16 and the concave portions 17. The right end of the right rotor piece 2c has a substantially circular edge portion 18 having an outer diameter smaller than the inner ring of the bearing 9, and the convex portion 16 and the concave portion 17 are formed at the left end. Therefore, when these rotor pieces 2a, 2b, 2c are joined to each other at the joining portion, one rotating brush body 2 is formed by the concave and convex fitting of the convex portion 16 and the concave portion 17.

Here, the outer periphery of the rotating brush body 2
The brush bases 14, 14 are spirally wound around each other with a phase difference of 180 °, and each of the pieces 2a, 2
b and 2c are lengths corresponding to a half pitch of the brush base 14 (one pitch is the axial length of the rotating brush body 2 until the brush base 14 makes one revolution and returns to the original position). Is assigned. Therefore, when they are joined, the brush bases 14, 14 are continuously connected as shown in the drawing to form the rotary brush body 2 having a pitch of one and a half.

Further, as a configuration unique to this embodiment,
A cylindrical portion 8a having an outer diameter smaller than the inner ring of the bearing 9 and having a tip protruding leftward from the left end of the outer peripheral portion 8b is formed substantially at the center of the brush rotor 8. According to this, as shown in FIG. 10, the brush rotor 8 is more securely fixed together with the idle pulley 6 and the rotary brush body 2 as compared with the conventional structure in which the brush rotor 8 is fixed to the shaft 3 using the screw 7. , The number of parts is reduced, and the assembly process of the rotary brush device 1 is simplified. Then, the washer 11 and the nut 12 are tightened from both sides of the shaft 3. In addition, the operation of the rotary brush device 1 is the same as that of the above-described conventional device, and thus the description thereof is omitted.

<Second Embodiment> A second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a partial cross-sectional view of the rotary brush device of the vacuum cleaner according to the present embodiment, and FIG. 4 is a partial cross-sectional view showing an enlarged main part thereof.
In this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The divided structure of the rotating brush body 2 in the rotating brush device 1 according to the present embodiment is the same as that in the first embodiment.

The unique configuration of the rotary brush device 1 according to the present embodiment will be described. As shown in FIG. 4, a first nut having a relatively large outer diameter is fitted to a predetermined length from both ends of the shaft 3. The joining portion 3a and the second nut fitting portion 3b having a relatively small outer diameter and intermittently connected to the first nut fitting portion 3a with a step are formed. In addition, the first
The outer diameter of the nut fitting portion 3 a is selected to be smaller than the outer diameter of the inner ring of the bearing 9.

As shown in FIG. 3, the rotary brush body 2 provided with the brush rotor 8, the idle pulley 6 and the main pulley 4 is fitted to the first nut with nuts 20 from both sides of the shaft 3 via washers 19. It is fastened and fixed to the part 3a (FIG. 4). Then, the bearing 9 is pressed against the step to be positioned, and the supporting member 10 is fitted to the second nut fitting portion 3b (FIG. 4) formed near the both ends of the shaft 3 by the nut 12 via the washer 11. Is fixed. Thereby, the rotating brush body 2, the idle pulley 6,
The fixing of the brush rotor 8 and the support member 10 to the shaft 3 is assured, and the displacement of the shaft 3 in the axial direction can be effectively prevented even when the rotary brush device 1 is in use. In addition, the operation of the rotary brush device 1 is the same as that of the above-described conventional device, and thus the description thereof is omitted.

<Third Embodiment> A third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a partial cross-sectional view of the rotating brush device according to the present embodiment. In this embodiment, the same members as those in the first or second embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

A specific configuration of the rotary brush device according to the present embodiment will be described. The rotary brush body 2 is provided separately from the main pulley 4, and the rotary brush body 2 is separable and has a plurality of rotors having the same shape and size. Pieces 2d, 2d,
2d. Then, a donut-shaped disk 21 formed on the right side of the main pulley 4
At the right end and at both ends of the rotor piece 2d, there are provided a plurality of projections 16 and recesses 17 which fit together as shown in FIG. Accordingly, when the main pulley 4 and the rotor pieces 2d, 2d, 2d are connected to each other at the joint, one rotary brush body 2 is formed together with the main pulley 4 by the concave and convex fitting of the convex portion 16 and the concave portion 17. It is formed.

Reference numeral 22 denotes a rotor collar fixed to the rotor piece 2d located on the rightmost side, and serves to secure the rotary brush body 2 to the shaft 3 by being tightened by the nut 20. In addition, the method of assembling the rotary brush device 1 and the operation thereof are the same as those in the first or second embodiment, and thus the description thereof is omitted.

According to the present embodiment, since the rotating brush bodies 2 having various shapes and dimensions can be manufactured by the number of the same rotor pieces 2d manufactured from the same mold, the management of the mold is facilitated. In addition, manufacturing costs can be reduced.

<Fourth Embodiment> A fourth embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a partial cross-sectional view of the rotating brush device according to the present embodiment. In this embodiment, the same members as those in the first to third embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

The rotating brush device according to this embodiment will be described in detail. The rotating brush body 2 is provided separately from the main pulley 4, and the rotating brush body 2 is separable and has a plurality of rotors having the same shape and size. Pieces 2e, 2e, 2
e, and donut-shaped reinforcing plates 23 are fixed to both ends of the rotor pieces 2e or provided integrally with the rotor pieces 2e. At the right end of the donut-shaped disk 21 formed on the right side of the main pulley 4 and at both ends of the rotor piece 2e, there are provided a plurality of convex portions 24 and concave portions 25 which fit together as shown in FIG. ing. Therefore, when the main pulley 4 and the rotor pieces 2e, 2e, 2e are joined to each other at the joint, one rotating brush body 2 is formed together with the main pulley 4 by the concave and convex fitting of the convex portion 24 and the concave portion 25. It is formed. In addition, since the assembling method and the operation of the rotating brush device 1 conform to the above-described first to third embodiments,
Description is omitted.

According to the present embodiment, the reinforcing plates 23 are provided at both ends of the rotor piece 2e, and the main pulley 4 and the rotor pieces 2e or the rotor pieces 2e are connected via the reinforcing plates 23. The coupling strength increases, and the operation stability of the rotating brush device 1 can be improved.

<Fifth Embodiment> A fifth embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a perspective view illustrating a configuration of an idle pulley of the rotary brush device according to the present embodiment. Conventionally, the bearing 5 is attached to the idle pulley 6 by press-fitting the cylindrical idle pulley 6 into the inner hole. In the case of fixing by press-fitting, an adhesive is applied to a portion where the outer ring of the bearing 5 and the idle pulley 6 are in contact with each other, so that the two are firmly fixed.

However, when the belt 109 is suspended on the main pulley 4, the bearing 5 has heat due to friction with the shaft 3 rotating at a high speed, and the outer ring of the bearing 5 and the idle pulley 6 due to a difference in coefficient of thermal expansion. There was a case where a gap was formed in the bonding portion of the. Therefore, when the suspension of the belt 109 is switched to the idle pulley 6 side, the rotation speed of the outer ring of the bearing 5 that should rotate with the idle pulley 6 is relatively shifted, and the friction with the idle pulley 6 causes rattling. There was a risk of abnormal noise.

In this embodiment, as shown in FIG. 8, the idle pulley 6 is composed of two separable members 6a and 6b.
6. Tighten and fix. As a result, the idle pulley 6 can be securely fixed to the bearing 5 by physical force, and the generation of the gap can be effectively prevented.

According to the present embodiment, even if dust is clogged between the inner ring and the outer ring of the bearing 5 and slippage is deteriorated, the idle pulley 6 is disassembled by loosening the screw 26.
Since the bearing 5 can be easily removed, maintenance work such as removal of clogged dust can be largely saved.

<Sixth Embodiment> A sixth embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a perspective view illustrating a configuration of a support member of the rotating brush device according to the present embodiment. Rotary brush device 1 described in the fifth embodiment
The problem with the idle pulley 6 described above also applies to the support member 10 as it is.

Therefore, in the present embodiment, as shown in FIG. 9, the support member 10 comprises two separable members 10a and 1a.
0b, which hold the bearing 9 therebetween and
7 to secure. Thereby, the support member 10 can be securely fixed to the bearing 9 by physical force,
It is possible to effectively prevent a gap from being formed at a contact portion between the outer ring and the support member 10.

In addition, according to the present embodiment, even if dust is clogged between the inner ring and the outer ring of the bearing 9 and slippage is deteriorated, the bearing 9 is disassembled by loosening the screw 27 and disassembling the support member 10. Since it can be easily removed, maintenance work such as removal of clogged dust can be greatly reduced.

In each of the above embodiments, a case has been described in which the rotating brush body is formed by connecting three rotor pieces in the axial direction. However, the number is not necessarily three.
For example, by increasing the length of the shaft and increasing the number of pieces at the portion sandwiched between the rotor pieces at both ends, a longer rotating brush body can be realized, and it is possible to flexibly cope with design changes such as design and dimensions. At this time, the rotor pieces are separably connected to each other by the concave-convex fitting mechanism. However, in addition to the concave-convex fitting mechanism, an adhesive or the like may be applied to the joint to firmly connect the rotor pieces.

Also, the case where the vacuum cleaner is an upright type vacuum cleaner has been described as an example, but the same configuration is applied to the nozzle part of a household vacuum cleaner in which the main body and the nozzle part are provided separately. May be provided. In this case, a motor may be separately provided inside the nozzle portion, a belt may be suspended on the motor shaft and either the idle pulley or the main pulley, and the suspension of the belt may be switched as necessary. .

Further, a rotary brush device having both a main pulley and an idle pulley has been described. However, both of them may be omitted or only the main pulley may be provided to connect a plurality of rotor pieces. The rotating brush body may be constantly rotated during cleaning by the vacuum cleaner.

[0047]

As described above, according to the present invention, a rotating brush body for scraping dust incorporated in a rotating brush device of a vacuum cleaner is constituted by connecting a plurality of rotor pieces in an axial direction. Therefore, by appropriately changing the length of the rotating shaft of the rotating brush device and the number of the rotor pieces, it is possible to provide a rotating brush device that can flexibly cope with design changes such as design and dimensions at low cost.

Further, in a rotary brush device in which the rotation of the rotating belt is switched between a main pulley and an idle pulley to change the rotation / stop of the rotary brush device, the idle pulley holds a bearing. Since the idle pulley is constituted by two separable members, the idle pulley can be securely fixed to the bearing by physical force, and generation of abnormal noise due to friction between the idle pulley and the outer ring of the bearing can be effectively prevented. Further, even if dust is clogged between the inner ring and the outer ring of the bearing and slippage is deteriorated, the bearing can be easily removed by disassembling the idle pulley, thereby greatly reducing maintenance work such as removal of the clogged dust. .

When the rotating brush device is fixed to the nozzle of the vacuum cleaner by using a supporting member,
By forming the support member from two separable members that sandwich the bearing, the support member can be securely fixed to the bearing by physical force, and the occurrence of abnormal noise due to friction between the support member and the outer ring of the bearing is reduced. It can be effectively prevented. Further, even if dust is clogged between the inner ring and the outer ring of the bearing and slippage is deteriorated, the bearing can be easily removed by disassembling the support member, thereby greatly reducing maintenance work such as removing the clogged dust. .

Further, by connecting a plurality of rotor pieces in a separable manner, even if some rotor pieces are broken,
It can be removed and replaced with a new one, so that the rotating brush body can be repaired economically and easily.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a rotary brush device according to a first embodiment of the present invention.

FIG. 2 is a configuration explanatory view of a rotating brush body of the rotating brush device.

FIG. 3 is a partial cross-sectional view of a rotary brush device according to a second embodiment of the present invention.

FIG. 4 is a partially enlarged view showing a main part of the rotary brush device in an enlarged manner.

FIG. 5 is a partial sectional view of a rotary brush device according to a third embodiment of the present invention.

FIG. 6 is a partial sectional view of a rotary brush device according to a fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram of a configuration of a rotating brush body of the rotating brush device.

FIG. 8 is a perspective view showing a configuration of an idle pulley of a rotary brush device according to a fifth embodiment of the present invention.

FIG. 9 is a perspective view illustrating a configuration of a support member of a rotary brush device according to a sixth embodiment of the present invention.

FIG. 10 is a side sectional view of an example of an upright type vacuum cleaner.

FIG. 11 is a partial sectional view of a conventional rotary brush device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotating brush device 2 rotating brush body 2a to 2e rotor piece 3 shaft 4 main pulley 5, 9 bearing 6 idle pulley 7, 26, 27 screw 8 brush rotor 10 support member 11, 19 washer 12, 20 nut 13 pin 14 brush base 15 Bundle brush 16, 24 Convex part 17, 25 Concave part 18 Edge part 21 Disk 22 Rotor collar 23 Reinforcement plate

Claims (11)

[Claims] 1. A rotary brush device for a vacuum cleaner, wherein a rotary brush body is provided in the nozzle portion so as to face an external space from a dust suction port of the nozzle portion, wherein the rotary brush body has a plurality of rotors having brushes on the surface. A rotary brush device for a vacuum cleaner, wherein pieces are connected in an axial direction. 2. A rotary brush body facing an external space from a dust suction port of a nozzle part, a rotary shaft inserted in an axial direction of the rotary brush body and rotatably supported by the nozzle part; A rotary brush of a vacuum cleaner, comprising: a main pulley fixed to a shaft; and transmitting the rotation of a motor mounted on the nozzle portion to the main pulley via a belt to rotate the rotary brush body. In the apparatus, the rotating brush body is constituted by connecting a plurality of rotor pieces each having a brush on a surface in an axial direction. 3. A rotary brush body facing an external space from a dust suction port of a nozzle portion, a rotary shaft inserted in an axial direction of the rotary brush body and rotatably supported by the nozzle portion, and A nozzle, comprising: a main pulley fixed to a shaft; and an idle pulley rotatable independently of the rotation shaft via a bearing with respect to the rotation shaft, and provided adjacent to the main pulley. A rotary brush device for a vacuum cleaner that switches rotation and stop of the rotary brush body by transmitting rotation of a motor mounted on the unit to the main pulley or the idle pulley via a belt; A rotating brush device for a vacuum cleaner, wherein the body is formed by axially connecting a plurality of rotor pieces each having a brush on a surface. 4. The nozzle according to claim 2, wherein the rotary shaft is attached to the nozzle by a support member having a bearing that rotatably supports both ends of the rotary shaft. A rotary brush device for the vacuum cleaner according to the above. 5. A rotary brush body facing an external space from a dust suction port of a nozzle part, a rotary shaft inserted in an axial direction of the rotary brush body and rotatably supported by the nozzle part; A main pulley fixed to a shaft, an idle pulley rotatable with respect to the rotary shaft independently of the rotary shaft via a bearing, and provided adjacent to the main pulley; and an inner ring of the bearing. And a support member inserted into both ends of the rotating shaft via bearings and attached to the nozzle portion, and the rotation of a motor mounted on the nozzle portion is rotated via a belt. In the rotating brush device of the vacuum cleaner, which is configured to switch between rotation and stop of the rotating brush body by transmitting the rotating brush body to the main pulley or the idle pulley, Vacuum cleaner of the rotary brush device, wherein a plurality of rotor pieces are constituted by coupled axially with brush. 6. A portion having a predetermined length from both ends of the rotating shaft includes a relatively large portion having a large inner outer diameter,
An outer portion having a relatively small outer diameter is formed intermittently with a step, and the brush rotor, the idle pulley, the main pulley, and the rotary brush body are formed by a portion of the rotary shaft having a relatively large outer diameter. 6. The rotary brush device for a vacuum cleaner according to claim 5, wherein the supporting member is fixed to both sides of the supporting member so that the supporting member is pressed against the step with a relatively small outer diameter. 7. The rotary brush for a vacuum cleaner according to claim 2, wherein the main pulley and one of the plurality of rotor pieces are integrally formed. apparatus. 8. The rotary brush device for an electric vacuum cleaner according to claim 3, wherein the idle pulley includes two separable members for holding a bearing. 9. The rotary brush device for an electric vacuum cleaner according to claim 4, wherein said support member comprises two separable members for holding a bearing. 10. The rotary brush device for a vacuum cleaner according to claim 1, wherein said plurality of rotor pieces are separably connected. 11. The method according to claim 1, wherein the plurality of rotor pieces are connected by a concave / convex fitting mechanism.
0. The rotary brush device for an electric vacuum cleaner according to any one of 0 to 0.