JP2001346730A - Sucking tool for vacuum cleaner, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently reduce a calorific value of an electric motor even in a cleaner body having a low air quantity in a sucking tool body for internally storing the electric motor in a rotary brush. SOLUTION: A fan 46a is connected to an output shaft 50 of the electric motor 46, and outside air flows inside the rotary brush 31 by passing through a hollow part of a hollow shaft 54 by an inflow port 64 by rotating by interlocking with the electric motor 46, and becomes cooling wind passing through the inside of the electric motor 46 by the inflow outside air, and cools the electric motor 46 or a speed reducer 47.

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 structure in which a rotating brush is driven to rotate by an electric motor and exhaust air from a cleaner body is circulated, and the suction device for the vacuum cleaner is connected. The present invention relates to an electric vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, this type of suction device for a vacuum cleaner has
The configuration was as shown in FIGS. Less than,
The configuration will be described.

The suction tool main body 1 has a built-in rotary brush 2 for releasing dust adhering to a surface to be cleaned such as a carpet, and a rotatable joint 9 connected to the extension pipe 3 at a rear portion.
The cleaner main body 4 includes a dust collecting chamber 5 for collecting dust therein and an electric blower 6. A hose 8 connected to the extension pipe 3 is connected to a connection port 7 provided in the cleaner main body 4. The joint 9 of the suction tool main body 1 is configured to communicate with the connection port 7. Further, the dust sucked from the suction tool main body 1 is conveyed from the joint 9 to the dust collecting chamber 5 and collected.

The dust sucked from the suction tool body 1 is
The dust is conveyed from the joint 9 to the dust collection chamber 5 and collected. The suction air then passes through the vacuum cleaner main body 4 again from behind the electric blower 6, enters the suction tool main body 1 through the connection port 7 via the joint 9, and discharges exhaust air into the suction tool main body 1. It is configured to circulate.

The rotary brush 2 is rotatably provided in a suction chamber 11 of the suction tool main body 1 so as to face a suction port 10 opened on the lower surface of the suction tool main body 1. This rotating brush 2
A plurality of dust removers 13 forming a dust scraping portion are provided on an outer peripheral surface of a substantially cylindrical brush holder 12 formed of a thermoplastic resin such as ABS, polystyrene, or polypropylene. The dust removing member 13 is formed in a brush shape by a fiber such as nylon, and a part of the plurality of dust removing members 13 is pressed against the surface to be cleaned by 0.5 mm or more.

Inside the brush holder 12, a motor 14 for driving the rotary brush 2 to rotate, a torso 29 made of a metal having a magnetic force, such as iron, on the outer peripheral surface of the motor 14 for improving the torque of the motor 14, a motor. A reduction gear 15 for reducing the rotation speed of the gear 14, a gear 16 for transmitting the output of the reduction gear 15 to the brush holder 12, and the like are built in. Here, the rotating brush 2 has a built-in electric motor 14, a reduction gear 15, and the like, and has a diameter of 26 mm to 43 mm based on the torque of the electric motor 14 and the performance of scraping up dust at the tip of the dust removing body 13 on the outer peripheral surface. And

The electric motor 14 is held in the brush holder 2 by being interposed in the air by a gear 16 so as to be axially supported in the air, and the other end is connected to the output shaft 17 of the electric motor 14 by a hollow shaft connected to the opposite end. 21. The electric motor 1
4 is a hollow shaft 21 so as not to rotate together with the brush holder 2.
The hollow shaft 21 is supported by the suction tool main body 1 by the
The hollow shaft 21 is rotatably held by an end cap 26 having a configuration in which the outer peripheral surface of the hollow shaft 1 idles and the hollow shaft 21 is supported by the brush holder 2.

The speed reducer 15 is constituted by a planetary gear and connects the output shaft 17 of the motor 14 to reduce the rotation speed of the motor 14. Here, the reduction ratio of the reduction gear 15 is 1/3 to
1/9 (preferably, 1/5 to 1/7).

The gear 16 is made of an industrial plastic such as polyacetal or polyamide, and
2, a cushioning material 19 made of rubber, elastomer, or the like is interposed in a portion that meshes with the bearing support portion 18 formed on the inner surface of the toothed portion 2, and between the tooth profiles due to the elasticity of rubber, elastomer, or the like. The meshing sound is buffered.

Here, the bearing support portion 18 is formed on the inner surface of the brush holder 12 at the substantially central portion in the axial direction, and the gear 16 is connected to the brush holder 12 at the substantially central portion of the brush holder 12 in the axial direction. I have. At a substantially central portion of the brush holder 12, there are a plurality of outlets 20 provided so as to communicate the inside and the outside of the brush holder 12, and the outlet 20 is connected to the electric motor 14 and the reduction gear 1 by the hollow shaft 21.
5 is communicated with a cooling air passage 22 passing outside.

The outlet 20 is provided at a position facing the joint 9, and a filter 23 is provided on the inner surface of the brush holder 12 to prevent dust from entering the inside of the brush holder 12 from the outlet 20.

A shaft support 24 for supporting the rotary brush 2 is provided on a side wall of the suction tool main body 1, and the end of the rotary brush 2 is supported on the shaft support 24 with a buffer member 25 interposed therebetween.
The cushioning member 25 is formed of a material having excellent elasticity, such as rubber and elastomer, and absorbs vibration and chatter due to rotation of the rotating brush 2 to make it difficult to transmit the vibration to the suction tool main body 1.

An inlet 27 is provided on the side of the suction tool main body 1 facing the hollow shaft 21, and the inlet 27 is connected to the hollow shaft 2.
The filter member 28 is interposed between the filter member 28 and the first end face.

In the above configuration, when the suction cleaner main body 1 is grounded to the surface to be cleaned while the vacuum cleaner main body 4 is operating, the rotating brush 2 is driven to move the dust on the surface to be cleaned to the dust remover 13. The dust is collected in the dust collecting chamber 5 by the suction wind from the joint 9.

The suction air is applied to the outlet 20 of the rotating brush 2.
, A wind for cooling the electric motor 14 is generated from the inflow port 27.

[0016]

In such a conventional configuration, the electric blower 6 must be hermetically closed in order to circulate exhaust air inside the vacuum cleaner main body 4.
The cross-sectional area through which the suction air and the exhaust air pass tends to be greatly reduced in terms of the configuration, and since the amount of the suction air and the amount of the exhaust air taken in from the suction tool body 1 are the same, a large pressure is applied to the suction air. Due to the loss, the suction air volume tends to be reduced by about 50% to 70% as compared with the conventional vacuum cleaner body.

Therefore, when the suction wind generated in the cleaner main body 1 or the dust collecting chamber 5 of the cleaner main body 1 is full of dust, the suction wind reaching the suction tool main body 1 becomes a breeze.

In this case, the negative pressure generated in the suction chamber 11 of the suction tool body 1 is applied to each of the suction port 10 and the outflow port 20, but the suction port 10 is much larger than the outflow port 20. However, only a slight negative pressure is generated at the outlet 20.

As a result, the cooling air passing through the cooling passage 22 becomes very small, and it becomes impossible to sufficiently cool the electric motor 14, and the amount of heat generated by the electric motor 14 increases to shorten the life of the electric motor 14. Reduction gear 15, gear 1
6 has a problem that the cushioning material 19 on the outer peripheral portion is destroyed by the heat of the electric motor 14, thereby impairing the function of the suction tool main body 1.

The present invention is to solve the above-mentioned conventional problems, and is to solve the problem with respect to the electric motor of the suction tool main body with a built-in electric motor used in a vacuum cleaner having a low air flow or a power outage. The purpose of this is to improve the life of the suction tool body by improving the operability of the suction tool.

[0021]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an air intake passage which connects a suction side of an electric blower built in a cleaner body to a suction tool, and discharges air from the electric blower. An exhaust passage for recirculating at least a part of exhaust gas to the suction tool, wherein the suction tool is rotatably held facing an opening formed on a lower surface, and is built in the rotary brush; It is a suction device for a vacuum cleaner provided with a motor for rotationally driving the motor, and a fan is provided on a rotor of the motor, and the motor inside the rotating brush generates itself even if the cooling air is a low air flow. The amount of heat can be dissipated by the fan itself to improve cooling efficiency, thereby improving the life of the motor and preventing damage to the drive transmission around the motor due to heat, thereby improving the durability of the suction tool body. There can be improved without permission.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to an intake passage communicating a suction side of an electric blower built in a cleaner body with a suction device, and exhaust air discharged from the electric blower. Has an exhaust passage for returning at least a part of the suction tool to the suction tool, wherein the suction tool is rotatably held facing an opening formed on the lower surface, and is built in the rotation brush. Equipped with a rotating motor
A suction device for a vacuum cleaner in which a fan is provided on a rotor of the electric motor, the self-cooling air can be generated even inside the rotating brush even if the cooling air is a small amount, and the efficiency of cooling the electric motor can be improved. Therefore, it is possible to improve the life of the electric motor and prevent the drive transmission portion around the electric motor from being damaged by heat, thereby improving the durability of the suction tool main body, thereby improving the usability.

According to a second aspect of the present invention, there is provided an air suction passage which connects a suction side of an electric blower built in a cleaner body and a suction tool, and at least a part of exhaust gas discharged from the electric blower is sucked into the suction passage. A suction brush, wherein the suction tool includes a rotating brush rotatably held facing an opening formed on a lower surface, and the rotating brush includes an electric motor that rotationally drives the rotating brush, and the electric motor. A suction device for a vacuum cleaner having a built-in substantially cylindrical holder, and provided with a blade-shaped portion that generates an air flow flowing in the holder by rotation of the holder in the holder, wherein the cooling air has a low air volume. Also, the efficiency of cooling the motor by generating self-cooling air inside the rotating brush can be improved, so that the life of the motor can be extended and the drive transmission unit around the motor can be prevented from being damaged by heat, and the suction tool body can withstand By improving the durability, usability can be improved.

According to a third aspect of the present invention, there is provided an air suction passage communicating between a suction side of a motor-driven blower incorporated in a cleaner body and a suction tool, and at least a part of exhaust gas discharged from the motor-driven blower is suctioned. In the suction tool having an exhaust passage for returning to the tool, the suction tool includes a rotating brush rotatably held facing an opening formed on a lower surface, and an electric motor built in the rotating brush and rotating the brush. And the electric motor is located immediately before the intake passage,
On the outer surface of the rotating brush, there is a suction device for a vacuum cleaner with a vent formed.Even if the cooling air is low, the self-cooling air is generated even inside the rotating brush to increase the efficiency of cooling the motor. As a result, the life of the electric motor can be improved, and the drive transmission section around the electric motor can be prevented from being damaged by heat, so that the durability of the suction tool main body can be improved and the usability can be improved.

According to a fourth aspect of the present invention, there is provided a suction tool main body having a suction port opened on the lower surface, a suction chamber facing the suction port and being a space provided in the suction tool main body, and an opening in the suction chamber. Exhaust grille, a rotary brush rotatably provided in the suction chamber, an electric motor provided in the rotary brush for driving the rotary brush to rotate, and a rear portion of the suction tool main body communicating with the suction port. An arm vertically rotatably provided at a central portion, a joint communicating with the arm and connected to the rear end of the arm so as to be rotatable left and right, and a member for preventing the joint from coming off the arm. A stop body, an intake passage through which the intake air flowing from the suction port flows, and an exhaust passage into which the exhaust air discharged from the cleaner body flows, wherein the arm and the joint communicate with each other. And the exhaust passage Split, and a dividing wall provided in the joint communication path communicating the joint from the arm and provided substantially parallel to the longitudinal direction of the joint, and the exhaust passage so that exhaust air passes through the motor. A suction device for a vacuum cleaner with a communicating exhaust introduction passage.By using the exhaust air as cooling air to cool the motor, the cooling efficiency is improved, and the life of the motor is extended to improve the durability of the suction device body. By improving, the usability can be improved.

According to a fifth aspect of the present invention, there is provided a brush holder forming an outer shell of a rotating brush, a dust removing member provided on an outer periphery of the brush holder for removing dust on a surface to be cleaned, and a brush holder inside the brush holder. An electric motor that is arranged and drives the brush holder to rotate, an outlet provided at a substantially central portion of the brush holder and communicating the inner surface and the outer surface of the brush holder, and attached to one of left and right end surfaces of the brush holder. An end cap for holding and fixing the electric motor so as not to rotate together with the brush holder; and the end cap is provided in a hollow shape and provided in a direction close to the outer peripheral surface of the suction tool body of the end cap. The brush holder is driven by a rotary drive on an inflow port and a surface of the end cap that enters the inside of the brush holder. Claim cooling air toward the outlet from the inlet port and a plurality configure blade shape generated by 1
5. The suction device for a vacuum cleaner according to any one of items 4 to 4, wherein self-cooling air is generated even inside the rotating brush even when the cooling air volume is low, and the efficiency of cooling the electric motor can be improved. Therefore, it is possible to improve the life of the electric motor and prevent the drive transmission portion around the electric motor from being damaged by heat, thereby improving the durability of the suction tool main body, thereby improving the usability.

According to a sixth aspect of the present invention, there is provided the suction device for a vacuum cleaner according to the fifth aspect, further comprising a cooling fan provided inside the brush holder and configured to forcibly discharge cooling air from an outlet. Yes, even if the amount of cooling air is low, self-cooling air can be generated even inside the rotating brush to improve the efficiency of cooling the motor, so that the life of the motor is improved and the durability of the suction tool body is improved. This can improve usability.

According to a seventh aspect of the present invention, in order to improve the torque of the motor, a body winding made of iron is provided on the outer peripheral surface of the motor, and a convex portion extending in the longitudinal direction of the motor is provided on the surface of the body winding. The suction tool for a vacuum cleaner according to any one of claims 1 to 6, comprising a plurality of sheets, and has an increased surface area for dissipating the electric motor even when the cooling air flow is low, thereby improving the cooling efficiency. Therefore, the usability can be improved by improving the life of the electric motor and improving the durability of the suction tool main body.

According to an eighth aspect of the present invention, the suction device for a vacuum cleaner according to any one of the first to seventh aspects, wherein the convex portion provided on the body winding is provided in a spiral shape in the longitudinal direction. Therefore, even if the amount of cooling air is low, the surface area for radiating the electric motor is enlarged to increase the cooling efficiency, and the cooling efficiency can be further improved by generating self-cooling air inside the rotating brush. Therefore, the usability can be improved by improving the life of the electric motor and improving the durability of the suction tool main body.

According to a ninth aspect of the present invention, there is provided a suction member body comprising a lower member having a suction port opened on a lower surface, an upper member for covering the suction port from above, and a joint between the lower member and the upper member. A rotary brush rotatably provided in the suction tool main body so as to face the suction port, an electric motor for driving the rotary brush to rotate, the rotary brush being a base brush holder serving as a rotation shaft center, and the brush The outer periphery of the holder is formed of a plurality of protruding dust removers, and the shortest distance between the end of the suction port located forward of the suction tool body and the surface of the brush holder is set to 10 mm or less. It is a suction tool for electric cleaning according to any one of claims 1 to 8, wherein a carpet (shag carpet) configured by twisting hairs per hair is cleaned.
Suppressing the carpet hair at the front end of the suction port before the rotating brush lifts the carpet hair Reducing the force to operate the main body back and forth to reduce the cleaning work, and also reduce the load on the electric motor that drives the rotating brush, thereby improving the life of the electric motor and improving the durability of the suction tool main body. Can improve the usability. In addition, since it is possible to prevent the bristle constituting the carpet from being pulled out by the rotating brush, it is possible to provide a suction tool main body with improved usability.

According to a tenth aspect of the present invention, the end of the suction port located rearward of the suction tool main body has a wall shape perpendicular to the surface to be cleaned, and the height of the wall shape is high. Is set to at least 3.5 mm or more.
The rotary brush constitutes a carpet when performing a cleaning operation of a carpet (shag carpet), which is constituted by twisting hairs per piece, according to any one of the above-mentioned items. Before scraping the hair, the carpet hair is suppressed at the front end of the suction port, and the carpet that enters the inside of the suction port behind the suction port is caught between the rotating brush and the rear end of the suction port. To prevent the hair that makes up the carpet from getting entangled in the rotating brush, reducing the force to operate the suction tool body back and forth on the carpet, reducing the cleaning work, and using the rotating brush. By reducing the load on the motor to be driven, the life of the motor is improved, and the durability of the suction tool body is improved, so that the usability can be improved. In addition, since it is possible to prevent the bristle constituting the carpet from being pulled out by the rotating brush, it is possible to provide a suction tool main body with improved usability.

The invention according to claim 11 is characterized in that a plurality of insertion grooves extending in the longitudinal direction are provided on the outer peripheral surface of the brush holder,
A base cloth provided on the dust removing body for inserting and fixing the dust removing body in the insertion groove; a brush strain provided vertically to the base cloth and gathering fibers such as nylon; 11. A method according to claim 1, wherein a plurality of brush stocks are implanted in a line in the direction, and a length of the brush stock protruding from the surface of the brush holder is set so as to enter the surface to be cleaned by 0.5 mm or more. The vacuum cleaner suction device according to the paragraph, when cleaning the various types of carpet, by reducing the load that the brush stock that constitutes the dust removal body of the rotating brush sneaks into the carpet and gives to the rotating brush , Reducing the power required to move the suction tool body back and forth on the carpet to reduce cleaning work, and to reduce the load on the motor that drives the rotating brush, prolonging the life of the motor and improving suction It is possible to improve the usability by improving the durability of the tool body.

According to a twelfth aspect of the present invention, an inlet provided at the outer peripheral portion of the suction tool main body has an inlet through which cooling air for suppressing heat generation of the electric motor is introduced from the outside air, and the inlet faces the interior of the suction chamber and communicates with the inlet. The suction tool for a vacuum cleaner according to any one of claims 1 to 11, wherein a ratio of an outlet to be opened and an opening area of the inlet and the outlet is set to 3.5: 1 or more. In addition, the efficiency of cooling the motor can be improved even when the amount of cooling air is low, so that the life of the motor is improved, and the durability of the suction tool main body is improved, thereby improving the usability.

According to a thirteenth aspect of the present invention, there is provided a filter for preventing dust from entering through a cooling air inlet and an outlet, and a pressure loss value of the filter is set to 4 mm or less. Item 13. The suction device for a vacuum cleaner according to any one of Items 1 to 12, wherein the efficiency of cooling the electric motor can be improved even when the amount of cooling air is low, so that the life of the electric motor is improved and the suction is performed. Usability can be improved by improving the durability of the tool body.

According to a fourteenth aspect of the present invention, there is provided an electric vacuum cleaner having a dust collecting chamber for collecting dust therein and an electric blower, the electric vacuum cleaner according to any one of the first to thirteenth aspects. Is a vacuum cleaner that has a connection port that is connected to communicate with the suction device for suction, preventing the bristle that composes the carpet from getting entangled in the rotating brush, and the force to move the suction device body back and forth on the carpet To reduce cleaning work,
In addition, ease of use can be improved by reducing the load on the motor that drives the rotating brush, thereby improving the life of the motor and improving the durability of the suction tool body.
In addition, since it is possible to prevent the bristle constituting the carpet from being pulled out by the rotating brush, it is possible to provide a suction tool main body with improved usability.

[0036]

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

The suction tool main body 30 has a built-in rotary brush 31 for releasing dust adhering to a surface to be cleaned such as a carpet, and a rotatable joint 33 connected to an extension pipe 32 at a rear portion. The cleaner main body 34 is provided with a dust collecting chamber 35 for collecting dust and an electric blower 36 inside. A hose 38 connected to the extension pipe 32 is connected to a connection port 37 provided in the cleaner main body 34. The joint 33 of the suction tool main body 30 is configured to communicate with the connection port 37.

The dust sucked from the suction tool main body 30 is transferred from the joint 33 to the dust collecting chamber 35 and collected.
The suction wind then passes through the vacuum cleaner main body 34 again from behind the electric blower 36 and passes through the connection port 37 to connect the joint 3.
3, the air enters the suction device main body 30 and the exhaust air is circulated in the suction device main body 30.

The rotary brush 31 is rotatably provided in a suction chamber 40 of the suction tool main body 30 so as to face a suction port 39 opened on the lower surface of the suction tool main body 30. The rotating brush 31 has a substantially cylindrical brush holder 41 formed of a thermoplastic resin such as ABS, polystyrene, or polypropylene.
Are provided with a plurality of dust removing members 42 constituting a dust scraping portion on the outer peripheral surface of the dust removing member.

The dust removing member 42 has a brush shape,
It may be a thin blade, a strip having a wiping effect (for example, a cloth strip), or a combination of these as appropriate. In this embodiment, the dust removing member 42 is a brush.

The dust removing member 42 is inserted and held in an insertion groove 43 provided in the longitudinal direction of the brush holder 41. The dust removing body 42 includes a base cloth 44 inserted into and held in the insertion groove 43 and a pile stock 45 for scraping up dust. It is desirable that the number of the dust removing members 42 is set to a value that can divide the value of 360 by an integer, and in the present embodiment, the number of the dust removing members is six. Further, the role can be changed by changing the length of the six dust removers 42. In particular, in this embodiment, the dust remover 42 provided on the same length as the lower surface of the suction tool main body 1 is implanted in two rows on the base cloth 44 and pressed against the surface to be cleaned by 0.5 mm or more. No. 42 was constituted by planting hair in one row.

Inside the brush holder 41, a motor 46 for driving the rotating brush 31 to rotate, a reduction gear 47 for reducing the number of rotations of the motor 46, a gear 48 for transmitting the output of the reduction gear 47 to the brush holder 41, etc. are incorporated. are doing. Here, the rotating brush 31 has a built-in electric motor 46, a speed reduction device 47, and the like.
The diameter is set to 26 mm to 43 mm from the dust scraping performance at the tip of the dust removing body 42 on the outer peripheral surface.

The motor 46 is composed of a commutator motor, and is provided with a motor board 48 on which a rectifier for rectifying a commercial power supply voltage and a noise suppressor are mounted. The motor board 48 is connected to the cleaner body 34 through the joint 33. Lead wire 49
And is configured to be driven by a rectified voltage of the commercial power supply voltage. Further, in order to improve the torque of the electric motor 46, a bobbin 67 having a magnetic force such as iron is attached to the outer periphery of the electric motor 46. The body winding 67 is provided with a convex portion 68 in the longitudinal direction of the electric motor 46 so as to have a space of 0.5 mm or more with respect to the inner diameter of the brush holder 41, and the convex portion 68 is horizontal with respect to the longitudinal direction, or It has a spiral shape. When the convex portion 68 is provided in a spiral shape, it is preferable that the air around the body winding 67 flows from the end of the brush holder 41 toward the center when the brush holder 41 rotates.

The fan 4 is connected to the output shaft 50 of the electric motor 46.
6a is connected and rotates in conjunction with the motor 46, so that outside air flows into the rotary brush 31 from the inflow port 64 through the hollow portion of the hollow shaft 54, and the inside of the motor 46 is Cooling air passing through the
Alternatively, the speed reduction device 47 is cooled.

Here, the rotation speed of the electric motor 46 is set to 3000 rpm to 15000 rpm because the rotation is transmitted to the brush holder 41 via the speed reducer 47. 3000rpm ~ 1170 when cleaning carpet
0 rpm is preferred.

The speed reducer 47 is constituted by a planetary gear and connects the output shaft 50 of the electric motor 46 to reduce the rotation speed of the electric motor 46. Here, the reduction ratio of the reduction gear 47 is 1/3 to
1/9 (preferably, 1/5 to 1/7). The sound insulation tube 51 covers the outer periphery of the speed reducer 47 and shields the sound, and is formed by aluminum die casting or plastic molding. The electric motor 4 is connected via the sound insulating cylinder 51.
6, the electric motor 46 and the reduction gear 47 are integrally connected, and a gear 48 is fitted to the output shaft 50.

The motor 46 is constituted by bearings or the like.
The bearing 52 for reducing the output loss of the motor supports the electric motor 46 on the brush holder 41. The inner ring is fixed to the sound insulating cylinder 51, and the outer ring is supported by the bearing support 53 of the brush holder 41.

A hollow shaft 54 having a hollow inner diameter is inserted and fixed to support the commutator 39a side of the electric motor 39.
Is provided. The hollow shaft 54 is formed of a material that is difficult to deform, such as an aluminum alloy, carbon steel (S45C), or industrial plastic, and has an inner diameter of 13 mm so that cooling air can be smoothly introduced. An inner ring of a bearing portion 55 configured by a bearing or the like to reduce output loss of the electric motor 46 is fixed to the hollow shaft 54, and an outer ring is supported by an end cap 56 fixed to an end of the brush holder 41.

A wing shape 55 is provided on the surface of the end cap 56 located on the inner side of the brush holder 41 so as to surround the outer periphery of the hollow shaft 54. Is also rotated so that wind is generated from the end of the brush holder 41 toward the center.

The gear 48 is made of an industrial plastic such as polyacetal or polyamide, and
1, a cushioning member 58 formed of rubber, elastomer, or the like is interposed in a portion that meshes with the bearing support portion 53 formed on the inner surface portion, and between the tooth profiles due to elasticity of rubber, elastomer, or the like. The meshing sound is buffered.

Here, the bearing support 53 is formed on the inner surface of the brush holder 41 at the substantially central portion in the axial direction, and the gear 48 is connected to the brush holder 41 at the substantially central portion of the brush holder 41 in the axial direction. I have. Bearing support 5
A cooling air passage is provided outside the hollow shaft 3 and communicates with the cooling air passage 59 passing from the hollow shaft 55 to the outside of the electric motor 46 and the reduction device 47.
1 and communicates with an outlet 60 provided on the outer peripheral surface.

The outlet 60 is provided at a position facing the joint 33, and a filter 61 is provided on the inner surface of the brush holder 41 to prevent dust from entering the brush holder 41 from the outlet 60. Further, the pressure loss value of the filter 61 is desirably set to 4 mm or less.

Further, a cooling fan 66 formed of a bearing support 53 or another component is provided on an inner portion of the brush holder 41 opposite to a portion where the outlet 60 is provided. The cooling fan 66 is the brush holder 41
Is rotated and rotated to discharge air near the outlet 60 from the outlet.

A shaft support 62 for supporting the rotary brush 31 is provided on the side wall of the suction tool main body 30, and the end of the rotary brush 31 is supported by the shaft support 62 with a buffer member 63 interposed therebetween. The cushioning member 62 is formed of a material having excellent elasticity, such as rubber or elastomer, and absorbs vibration and chatter due to rotation of the rotating brush 31 to make it difficult to transmit the vibration to the suction device main body 30. Further, an inlet 64 is provided on a side surface of the suction tool main body 30 facing the hollow shaft 54, and a filter material 65 is interposed between the inlet 64 and an end surface of the hollow shaft 54. Further, the pressure loss value of the filter material 65 is desirably set to 4 mm or less, and the opening area ratio between the inflow port 64 and the outflow port 60 is desirably set to 3.5: 1 or more.

When the rotary brush 31 is incorporated in the suction tool main body 30, the shortest distance 69 between the front end of the suction port 39 facing the joint 33 and the brush holder 41 is 10 m.
m or less, and the rear end opposite to the front end of the suction port 39 has a wall shape 70 perpendicular to the surface to be cleaned and having a height of 3.5 mm or more.
It is desirable to set

The safety device 71 stops the electric motor 46 when the suction tool main body 30 is turned upside down. Shaft 72
A detection lever 73 is rotatably mounted in the up-down direction, and a roller 74 constituting a ground contact portion is rotatably supported at the tip of the detection lever 73. When the suction tool main body 30 is floated in the air, the detection lever 73 and the roller 74 protrude from the back surface of the suction tool main body 30 by the bias of the spring 75, and when the suction tool main body 30 is brought into contact with the surface to be cleaned, the roller 74 The detection lever 73 contacts the surface to be cleaned.
Are configured to rotate upward.

A detection lever 73 is rotatably attached to the shaft 72. The detection lever 73 operates in accordance with the movement of the roller 74, and the tip end of the detection lever 73 protrudes and retracts into the moving object housing 76. When the suction device main body 30 is normally up and down, the movable body 7 is moved by the tip of the detection lever 73.
7, a switch 7 for controlling on / off of the electric motor 46
8 is configured to be turned on / off.

The moving body 77 is made of a ball of steel, plastic, or the like, is housed in a moving body housing 76 so as to be vertically movable, and is configured to move by inverting the suction tool body 30 up and down. When the suction tool body 30 is turned upside down,
The switch 78 is moved to a position where it is regulated so as not to be turned on, so that the switch 78 cannot be turned on by the movement of the detection lever 73.

The outer periphery of the suction tool main body 27 is basically composed of the upper member 7
3 and the lower member 74 are assembled from above and below. A transparent member 76 is welded and fixed to the central top surface of the upper member 73 so that the rotary brush 38 can be driven to rotate. Further, the bumper 75 interposed between the upper member 73 and the lower member 74 prevents the suction tool main body 27 and the wall from being damaged when the suction tool main body 27 accidentally hits a wall or the like accidentally during cleaning work. It is.

An arm 82 is provided at the center of the rear part of the suction tool main body 30 so as to be rotatable up and down with a rotating shaft 81 sandwiched between an upper member 79 and a lower member 80. The arm 82 has an opening communicating with the suction chamber 40, and the arm 8
2 has a first intake passage 83 formed in a passage shape up to the opening at the rear end. Further, the left and right end surfaces of the arm 82 surround the outer periphery of the first intake passage 83 of the arm 82 and the opening that opens outward in the left and right directions, and are formed by the opening that opens rearward and is surrounded by the outer periphery of the arm 82. The second formed on
An exhaust passage 84 is provided.

The second exhaust passage 84 is provided with an opening provided at the left and right ends of the arm 82, the upper member 79, and the arm 82.
The exhaust port 85 of the upper opening of the arm 82
Is provided.

The exhaust port 85 is provided between the upper member 79 and the transparent member 86.
The upper member 79 is provided with an exhaust grid 88 which communicates with a space 87 surrounded by the space 87 and communicates the space 87 with the suction chamber 40. Note that an exhaust filter 89 is interposed in a portion where the exhaust grid 88 and the suction chamber 40 communicate with each other.

A joint 33 is provided at the rear end of the arm 82 so as to be rotatable left and right. The arm 82 and the joint 33 are locked by inserting a locking body 90 so as not to come off. A connection portion 91 for connecting to the extension pipe 32 is provided at the rear end of the joint 33 so as to be substantially parallel to the outer periphery of the joint 33. Also, the joint 33
Is provided with an intake passage 92 communicating with the first intake passage 83 of the arm 82, and the intake passage 92 has an opening at the rear end of the connection portion 91. The connection portion 91 is provided in a substantially circular shape, and the intake passage 92 has a substantially D-shaped passage shape at the connection portion 91. A substantially D-shaped exhaust passage 9 obtained by inverting the intake passage 92 up and down is provided on the upper surface of the intake passage 92.
3 is provided, and a dividing wall 94 that divides the intake passage 92 and the exhaust passage 93 is provided inside the joint 33. The exhaust passage 93 communicates with an upper surface of the joint 33 through an outlet 95 opened toward a front upper surface of the joint 33.
The intake passage 92, the exhaust passage 93, and the dividing wall 94 are provided so as to be substantially parallel to the outer periphery of the joint 33.

On the upper surface of the joint 33, a cover 97 that covers the outlet 95 and forms a first exhaust passage 96 that communicates the outlet 95 with the second exhaust passage 84 is fixed to the joint 33 by screws 98.

The supply line 101 from the motor board 48 is
It is stored in the lower member 80 and enters the substrate chamber 100. Supply line 1
01 is connected to the control board 99 in the board chamber 100,
The lead wire 49 extending from the control board 99 is connected to the second exhaust passage 84.
Through the cover 97 and the joint 33 in the first exhaust passage 96.
And is fixed. The lead wire 49 supplies power to the electric motor 46 from the cleaner body 34 via the hose 38 and the extension tube 32.

As another embodiment, as shown in FIG. 11, the electric motor 46 is connected immediately before the intake passage, that is,
And the outlet 60 provided on the outer peripheral surface of the brush holder 41 of the rotating brush 31 is also arranged substantially in front of the air inlet 39. With this configuration, since the electric motor 46 is disposed immediately in front of the intake port 39 through which the suction air flows most, the electric motor 46 flows through the hollow portion of the hollow shaft 54 inside the rotary brush 31 and cools the electric motor 46. This is the position where the cooling air sucked into the intake port 39 through 60 flows best, and the cooling of the electric motor 46 is greatly improved.

Further, as another embodiment, an exhaust gas introduction passage 102 that connects the substrate chamber 100 and the hollow shaft 54 is provided so that exhaust air can be introduced into the cooling passage 59.

When the suction tool main body 30 is brought into contact with the surface to be cleaned, the roller 74 comes into contact with the surface to be cleaned, and the detection lever 73 rotates upward, whereby the rotating shaft 72 is moved. The switch 78 is turned on and the switch 78 is turned on by the detection lever 73 via the moving body 77.

In this state, the suction tool main body 30 and the vacuum cleaner main body 3
4 is energized, the electric motor 46 built in the rotating brush 31
Is rotated by the speed reducer 47, the rotational torque is increased, and the rotary brush 31 is driven to rotate. With the rotation of the rotating brush 31, dust attached to the carpet or the like is scraped up by the dust removing body 42 provided on the outer peripheral surface of the brush holder 41, and the scraped-up dust is collected by the suction chamber 40, the first intake passage 83, and the intake passage 92. Through the extension pipe 32 and the hose 38, and is sucked into the dust collecting chamber 35 of the cleaner body 34. The intake air in the suction device main body 30 is supplied to the first intake passage 8.
3. The air flow is smooth because the inside of the intake passage 92 is formed substantially parallel. In order to prevent the generation of wind noise inside the intake passage 92 from the direction of the flow of the suction wind, a reverse step is provided. In addition, by setting the reverse step, it is possible to prevent dust from being caught in the intake passage 92 and prevent dust from being clogged. Further, since the intake passage 92 has a substantially straight shape, even if the dust is clogged, the dust can be easily taken out from the suction port 39 by pushing the dust from the rear end of the connecting portion 91 with a rod shape. is there.

The exhaust air from the electric blower 36 passes through the inside of the main body from the connection port 37 through the hose 38 and the extension pipe 32, and passes through the exhaust passage 93, the discharge outlet 95, the first exhaust passage 96,
The air reaches the second exhaust passage 84 and the exhaust port 85, passes through the exhaust filter 89 from the space 87, and is injected from the exhaust grid 88 into the suction chamber 40. The injected exhaust air is supplied to the rotating brush 3
By the rotation force of 1, the wind blows onto the surface to be cleaned, and the dust on the surface to be cleaned floats, and is collected by the suction wind.

Further, as another embodiment, by providing an exhaust introduction passage 102 for communicating the substrate chamber 100 with the hollow shaft 54, the exhaust air is introduced into the cooling passage 59, so that the electric motor 46 is provided.
Can be cooled by exhaust air, and a stable cooling configuration can be provided even when the amount of intake air is extremely small. This can prevent the reduction gear 47 from deteriorating due to heat.

Here, the rotating brush 30 has a motor 46 built therein, so that its diameter is larger than that of the conventional one. However, when the diameter is large, when the rotation speed is the same as that of the conventional one, the dust brushing part ( The peripheral speed of the dust remover 42) 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 tool main body 30 and the surface to be cleaned, and the outside air flows in from the outer periphery of the lower member 80.
It is sucked together through 3. And fitting 3
The rotating brush 3 passes through an outlet 60 provided opposite to the rotating brush 3.
Since a negative pressure also acts on the vicinity of the cooling air passage 59 inside the inside, the outside air flows into the rotating brush 30 from the inflow port 64 through the hollow portion of the hollow shaft 54.

The inflowing outside air generates cooling air flowing out of the outlet 60 through the filter 61 through the cooling air passage 59 passing outside the motor 46 and the reduction gear 47, and the motor 46, the motor substrate 48, and the like. To cool.

However, in a recent vacuum cleaner, the output of the blower motor 36 is extremely small,
4, the heat generated by the motor 46 cannot be sufficiently cooled, and the ability to perform self-cooling around the motor 46 is required. By the cooling fan 66,
More cooling air can be generated in the cooling passage 59. Further, the cooling efficiency of the electric motor 46 is also improved by defining the pressure loss values of the filter 61 and the filter material 65 and setting the ratio of the opening area of the inflow port 64 and the outflow port 60 to the rate at which the cooling air can pass most easily. I can do it.

Further, the pile stock 45, which is set to have such a length as to bite into the carpet, which is the surface to be cleaned, in the dust removing body 42, is constituted by one row, so that the load on the rotating brush 41 can be reduced. With this configuration, the amount of heat generated can be reduced in order to reduce the load on the electric motor 46.

Further, by setting the lower member 80 as described above, the rotating brush can be used especially when cleaning a carpet (shag carpet) formed by twisting the hairs per one piece. Before scraping up the carpet hair, the carpet hair is suppressed at the front end of the suction port, and at the rear of the suction port, the carpet forming the carpet enters the inside of the suction port between the rotating brush and the rear end of the suction port. Prevents the hair constituting the carpet from getting entangled in the rotating brush by preventing it from being caught in the middle, reduces the force of operating the suction tool body back and forth on the carpet, and reduces the labor of cleaning work, In addition, ease of use can be improved by reducing the load on the motor that drives the rotating brush, thereby improving the life of the motor and improving the durability of the suction tool body. In addition, since it is possible to prevent the bristle constituting the carpet from being pulled out by the rotating brush, it is possible to provide a suction tool main body with improved usability.

Next, when the suction device main body 30 is floated in the air away from the surface to be cleaned, the urging of the spring 75 causes the detection lever 73 and the roller 74 to protrude from the back surface of the suction device main body 30, and the rotating shaft 72 rotates. Then, the switch 78 is turned off, the electric motor 46 is stopped, and the rotating brush 31 is stopped.

In this embodiment, the rotating brush 31 is
Although it is configured to be driven by an electric motor 46 built in the rotating brush 31, it may be configured to be rotationally driven via a belt (not shown) by an electric motor 46 provided outside the rotating brush 31.

[0080]

As described above, according to the first and second aspects of the present invention, even if the amount of cooling air is small, the self-cooling air is generated even inside the rotating brush to improve the efficiency of cooling the motor. Therefore, it is possible to improve the life of the electric motor and prevent damage to the drive transmission portion around the electric motor due to heat, thereby improving the durability of the suction tool main body, thereby improving the usability.

According to the third aspect of the invention, even if the amount of cooling air is low, the efficiency of cooling can be improved by enlarging the surface area for radiating the motor, thereby extending the life of the motor. By improving the durability of the suction tool body, the usability can be improved.

According to the fourth aspect of the present invention, even if the amount of cooling air is small, the surface area for radiating the electric motor is enlarged to improve the cooling efficiency, and the self-cooling air is also provided inside the rotating brush. As a result, the cooling efficiency can be further improved, so that the life of the electric motor can be improved and the durability of the suction tool main body can be improved, thereby improving the usability.

According to the fifth aspect of the present invention, when cleaning a carpet (shag carpet) in which one piece of hair is twisted, the rotating brush forms the carpet. To prevent the carpet hair from becoming entangled with the rotating brush in order to suppress the carpet hair at the front end of the suction port before scraping up, the force to move the suction tool body back and forth on the carpet is reduced. By reducing the labor of cleaning work and reducing the load on the electric motor that drives the rotating brush, the life of the electric motor is improved, and the durability of the suction tool body is improved, so that the usability can be improved. . In addition, since it is possible to prevent the bristle constituting the carpet from being pulled out by the rotating brush, it is possible to provide a suction tool main body with improved usability.

According to the sixth aspect of the present invention, when cleaning a carpet (shag carpet) in which one piece of hair is twisted, the rotating brush forms the carpet. The carpet hair is held down at the front end of the suction port before the suction is lifted, and the carpet that enters the inside of the suction port behind the suction port is caught between the rotating brush and the rear end of the suction port. To prevent the bristles that make up the carpet from getting entangled in the rotating brush, reduce the force to move the suction tool body back and forth on the carpet, reduce cleaning work, and drive the rotating brush By reducing the load on the electric motor, the life of the electric motor is improved, and the durability of the suction tool body is improved, so that the usability can be improved. In addition, since it is possible to prevent the bristle constituting the carpet from being pulled out by the rotating brush, it is possible to provide a suction tool main body with improved usability.

According to the seventh aspect of the present invention, when cleaning each type of carpet, the load applied to the rotary brush by the brush stock forming the dust removing body of the rotary brush falls into the carpet and is reduced. By doing so, the power to move the suction tool body back and forth on the carpet is reduced to reduce the cleaning work, and the load on the motor that drives the rotating brush is reduced, thereby improving the life of the motor. Usability can be improved by improving the durability of the suction tool body.

According to the present invention, the efficiency of cooling the motor can be improved even when the amount of cooling air is low, so that the life of the motor is improved and the durability of the suction tool body is improved. By improving, the usability can be improved.

According to the tenth aspect of the present invention,
By using the exhaust air as cooling air for cooling the electric motor, the cooling efficiency can be improved, and the life of the electric motor can be improved to improve the durability of the suction tool main body, thereby improving the usability.

According to the eleventh aspect of the present invention,
Prevents the bristles that make up the carpet from getting entangled in the rotating brush, reduces the force of operating the suction tool body back and forth on the carpet, reduces the cleaning work, and the burden on the motor that drives the rotating brush As a result, the life of the electric motor is improved, and the durability of the suction tool body is improved, so that the usability can be improved. In addition, since it is possible to prevent the bristle constituting the carpet from being pulled out by the rotating brush, it is possible to provide a suction tool main body with improved usability.

[Brief description of the drawings]

FIG. 1 is a top view of a vacuum cleaner suction tool with an upper member removed according to an embodiment of the present invention.

FIG. 2 is a side view of the suction device for the vacuum cleaner.

FIG. 3 is a bottom view of the suction device for the vacuum cleaner.

FIG. 4 is a central sectional view of the vacuum cleaner suction tool.

FIG. 5 is a local sectional view of the suction device for the electric vacuum cleaner.

FIG. 6 is a partial cross-sectional view of a rotating brush of the vacuum cleaner suction tool.

FIG. 7 is a local sectional view of a motor portion of the rotating brush of the suction tool for the vacuum cleaner.

FIG. 8 is a side view of the electric motor of the vacuum cleaner suction tool.

FIG. 9 is a top view of a suction device for a vacuum cleaner with an upper member removed from another embodiment.

FIG. 10 is a top view of a vacuum cleaner suction tool with an upper member removed from another embodiment.

FIG. 11 is a perspective view of a vacuum cleaner provided with a vacuum cleaner suction tool according to an embodiment of the present invention.

FIG. 12 is a top view of the conventional vacuum cleaner with the upper member removed.

FIG. 13 is a side view of the suction device for the vacuum cleaner.

FIG. 14 is a bottom view of the suction device for the vacuum cleaner.

FIG. 15 is a central sectional view of the vacuum cleaner suction tool.

FIG. 16 is a perspective view of the vacuum cleaner provided with the vacuum cleaner suction tool.

[Explanation of symbols]

 REFERENCE SIGNS LIST 30 suction tool main body 31 rotating brush 39 suction port 40 suction chamber 41 brush holder 42 dust removing body 46 electric motor 56 end cap 57 wing shape 60 outlet 64 inlet

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hidenori Kitamura 1006 Kadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. F term (reference) 3B057 BA09 BA27 3B061 AA24 AD11 AE02 AH02

Claims (14)

[Claims] 1. An intake passage communicating a suction side of an electric blower built in a cleaner body with a suction tool, and an exhaust passage returning at least a part of exhaust gas discharged from the electric blower to the suction tool. The suction tool has a rotary brush rotatably held facing an opening formed on a lower surface, and a motor built in the rotary brush and driving the same to rotate. Vacuum cleaner suction device with fan. 2. An intake passage communicating between a suction side of an electric blower incorporated in a cleaner body and a suction tool, and an exhaust passage returning at least a part of exhaust gas discharged from the electric blower to the suction tool. The suction tool has a rotating brush rotatably held facing an opening formed on the lower surface, the rotating brush is an electric motor that rotationally drives the rotating brush,
A suction tool for a vacuum cleaner, comprising: a holder having a substantially cylindrical shape in which the electric motor is incorporated; and a blade-shaped portion provided in the holder to generate an air flow flowing in the holder by rotation of the holder. 3. An intake passage communicating the suction side of the electric blower built in the cleaner body with the suction tool, and an exhaust passage returning at least a part of exhaust gas discharged from the electric blower to the suction tool. In the suction tool having, the suction tool includes a rotating brush rotatably held facing an opening formed in a lower surface, and a motor built in the rotating brush and driving the same to rotate. A suction tool for a vacuum cleaner, wherein the suction tool is located immediately before the intake passage and has a vent formed on an outer peripheral surface of the rotating brush. 4. A suction tool main body having a suction port opened on a lower surface, a suction chamber facing the suction port and being a space provided in the suction tool main body, an exhaust grid opened into the suction chamber, and the suction port. A rotary brush rotatably provided in the chamber, an electric motor provided in the rotary brush for driving the rotary brush to rotate, and communicating with the suction port so as to be rotatable at a substantially central portion behind the suction tool main body. An arm provided, a joint communicating with the arm and rotatably connected to a rear end of the arm, a locking member for preventing the joint from coming off from the arm, and the arm and the joint There is provided an intake passage into which the intake air flowing from the suction port flows, and an exhaust passage into which the exhaust air discharged from the cleaner body flows, dividing the intake passage and the exhaust passage, and From the arm A dividing wall provided in the communication passage of the joint communicating with a joint and provided substantially parallel to a longitudinal direction of the joint, and an exhaust introduction passage communicating with the exhaust passage so that exhaust air passes through the motor. Suction device for vacuum cleaner. 5. A brush holder forming an outer periphery of the rotary brush, a dust remover provided on an outer periphery of the brush holder for removing dust on a surface to be cleaned, and the brush provided at a substantially central portion of the brush holder. An outlet communicating between the inside and the outside of the holder, an end cap attached to one of the left and right end faces of the brush holder for holding and fixing the electric motor so as not to rotate with the brush holder, and the end cap is hollow The brush holder is rotatably driven on an inlet provided in a direction close to the outer peripheral surface of the suction tool main body of the end cap and on a surface of the end cap that enters the inside of the brush holder. A plurality of wings configured to generate cooling air from the intake toward the outflow port are configured in the above-described manner. Suction tool for vacuum cleaner. 6. The suction device for a vacuum cleaner according to claim 5, further comprising a cooling fan located inside the brush holder and configured to forcibly discharge air from an outlet. 7. An electric motor, comprising: a body winding made of iron on an outer peripheral surface of the motor to improve torque of the motor; and a plurality of convex portions extending on a surface of the body winding in a longitudinal direction of the motor. The suction tool for a vacuum cleaner according to any one of claims 1 to 6. 8. The method according to claim 1, wherein the convex portion provided on the body winding is provided in a spiral shape in the longitudinal direction.
Item 6. A suction device for a vacuum cleaner according to Item 1. 9. A lower member having a suction port opened on a lower surface, an upper member covering the suction port from above, a suction tool main body formed by joining the lower member and the upper member, and facing the suction port. A rotary brush rotatably provided in the suction tool main body, an electric motor for driving the rotary brush to rotate, the rotary brush includes a plurality of brushes at a base brush holder serving as a rotation axis center and an outer peripheral portion of the brush holder. The shortest distance between an end of the suction port located forward of the suction tool main body and the surface of the brush holder is set to 10 mm or less. The suction device for electric cleaning according to any one of the above. 10. An end portion of the suction port located rearward with respect to the suction tool main body has a wall shape perpendicular to a surface to be cleaned, and the height of the wall shape is at least 3.5 mm or more. The suction tool for a vacuum cleaner according to any one of claims 1 to 9, wherein the suction tool is set. 11. A plurality of insertion grooves extending in a longitudinal direction on an outer peripheral surface of the brush holder, a base cloth provided on the dust removing body for inserting and fixing the dust removing body in the insertion grooves,
A brush strain, which is provided perpendicular to the base cloth and gathers fibers such as nylon, and a length in which a plurality of brush strains are implanted in a line in the longitudinal direction of the base cloth and protrudes from the surface of the brush holder of the brush stock. The suction tool for an electric vacuum cleaner according to any one of claims 1 to 10, wherein the suction tool is set so as to enter the surface to be cleaned by 0.5 mm or more. 12. An inlet provided at the outer periphery of the suction tool body with an inlet for taking in cooling air from outside air for suppressing heat generation of the electric motor, an outlet facing the interior of the suction chamber and communicating with the inlet, The suction tool for a vacuum cleaner according to any one of claims 1 to 11, wherein a ratio of an opening area of an inlet and an opening area of the outlet is set to 3.5: 1 or more. 13. A filter for preventing dust from entering through an inlet and an outlet of a cooling air, and a pressure loss value of the filter is set to 4 mm or less water column. The suction device for a vacuum cleaner according to claim 1. 14. A vacuum cleaner body provided with a dust collecting 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 13. Vacuum cleaner with a connection port to be connected to.