JP2002028112A - Suction apparatus for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction apparatus for a vacuum cleaner capable of keeping a load applied to a driving roller and to a driving part constant, hardly causing failure, and turning a rotational brush stably for carrying out cleaning efficiently. SOLUTION: This suction apparatus is provided with the driving roller 14 supported by a lower case 1 of a suction apparatus main body 50 and rotated by contact with a cleaned face and the rotational brush 15 driven by the driving roller 14, and the rotational brush 15 is arranged in front of the driving roller 14 and provided with a rear wheel 3 arranged behind the driving roller 14 and a front wheel 2 arranged in front of the rotational brush 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for a vacuum cleaner having a rotary brush driven by a driving roller rotating in contact with a surface to be cleaned.

[0002]

2. Description of the Related Art FIG. 9 shows, for example, Japanese Patent Publication No. 63-31211.
It is sectional drawing of the suction tool of the conventional vacuum cleaner shown by Unexamined-Japanese-Patent Publication. In the figure, 40 is a suction tool main body case,
41 is a driving roller that rolls in contact with the floor surface, 42 is a rotating shaft of the driving roller, 43 is a rotating brush driven by the driving roller 41, 44 is a driven wheel, 45 is a coupling,
46 is a connection pipe.

In this configuration, the amount of interference between the rotating brush 43 and the floor surface is changed by switching the rotating shaft 42 of the driving roller 41 in the suction tool main body 40, and dust on the floor surface is removed by the rotating brush 43. .

[0004]

However, in the conventional suction device as described above, the front wheel or the rear wheel directly serves as the drive roller 41, and the force of the user is directly transmitted to the shaft of the drive roller 41. , Generates resistance due to large frictional force. If this resistance is present, there is a problem that the rotation property is deteriorated and the transmission to the rotating brush 43 is not performed well.

Further, when the suction tool is strongly pressed, friction is generated between the rotating shaft 42 and the bearing of the driving roller 41, the rotation is locked, the driving roller 41 slips, and a precision gear is used. As a result, there is a problem that the device is easily broken. In addition, when the drive roller 41 and the rotary brush 43 are removed, the storage portion of the drive unit such as the drive gear of the drive roller 41 is opened, so that there is a problem that dust enters there.

[0006] The performance required of the drive roller is to provide an optimum load regardless of the force applied by the user, that a large load cannot be applied due to the relationship with the precise gear, and that the clearance between the rotating shaft and the bearing is dusty. It is required that the size be large as long as the rotation can be transmitted without invasion of the vehicle, and that the suspension structure keeps the distance to the floor constant.

On the other hand, the performance required of the front wheel or the rear wheel is a strength capable of receiving the total load applied to the user's brush, and the brush is required to run stably without moving up and down. It is required that the clearance be an optimum value. However, it is difficult to satisfy the above required performance, and the drive roller 41 has a front wheel or
There was a problem that it was difficult to double as the rear wheel.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a constant load on a driving roller and a driving unit, has few troubles, and can stably rotate a rotating brush. An object of the present invention is to provide a suction device of a vacuum cleaner that can perform efficient cleaning by adjusting the rotation of a brush and that does not allow dust to enter a driving unit.

[0009]

SUMMARY OF THE INVENTION A suction device of a vacuum cleaner according to the present invention is driven by a driving roller supported by a lower case of the suction device main body and rotating in contact with a surface to be cleaned. In a suction device of a vacuum cleaner having a rotating brush, the rotating brush is disposed in front of the driving roller, a rear wheel provided behind the driving roller, and a front wheel provided in front of the rotating brush. , Is provided.

[0010] Further, a raised cloth is used for the drive roller.

[0011] Further, the rotary shaft of the coupling for connecting the suction tool main body and the elbow and the rotary shaft of the rear wheel are arranged coaxially.

[0012] Further, there is provided braking means for braking the driving roller, and the braking means is constituted by a flocked member in which the direction of the braking force is eccentric from the rotation center of the driving roller and is brought into contact with the surface of the driving roller.

In addition, a support member is provided for detachably supporting only one end of each rotation shaft of the drive roller and the rotary brush in the lower case of the suction device main body.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a sectional view of a central portion of a suction tool of a vacuum cleaner according to a first embodiment of the present invention. FIG. 2 is an exploded development view of FIG. 2 and FIG. 3 and FIG. 5 is a sectional view of a gear portion of the suction device, and FIGS. 6 to 8 are operation explanatory diagrams.

1 to 8, reference numeral 50 denotes a suction tool main body, 4 denotes a coupling, 5 denotes a cover coupling, 6 denotes an elbow 6, and 7 denotes a cover elbow. In the suction tool main body 50, 1 is a lower case, 2 is a front wheel, 3 is a rear wheel,
27 is a shutter mounted on the shaft 4a of the coupling 4,
8 is a spring for pressing the shutter 27 in the opening direction,
26 is an upper rear case, 22 is an upper front case, and 21 is a bumper. Reference numeral 14 denotes a driving roller, and a metal shaft 30
With plastic as a plus sign at both ends
1 is provided. Reference numeral 15 denotes a rotating brush which has a plus-shaped convex portion 33 made of a plastic material on one side,
The other is a plastic part 3 press-fitted with a metal shaft 34
5.

Reference numeral 53 denotes a driving roller 14, a rotating brush 15
Of the front gear 9 for rotatably supporting one end of the front gear 9 and the recess 10c of a plus sign of the rear gear 10
Is a supported gear storage portion, and is constituted by the lower gear storage portion 51 of the lower case 1 and the gear storage cover 16. 5
Reference numeral 4 denotes a bearing unit which is a support member that rotatably supports the other end of each of the driving roller 14 and the rotating brush 15,
The lower bearing 52 and the bearing cover 36 are provided. The lower bearing portion 52 has semicircular cuts 55 and 56, and the rear bearing cover 36 has semicircular cuts 57 and 58. Reference numeral 9 denotes a front gear connected to the rotary brush 15, reference numeral 10 denotes a rear gear connected to the drive roller, reference numeral 11 denotes a belt, and reference numeral 13 denotes an intermediate gear.

Next, the assembly will be described. Lower case 1
, A front wheel 2, a rear wheel 3, a coupling 4, a cover coupling 5, an elbow 6, a cover elbow 7, and a spring 8 are mounted. Mount the front gear 9 on the lower case 1,
Next, after attaching the belt 11 to the rear gear 10, the rear gear 10 is inserted through the gear hole 12 of the lower case 1.

At this time, the gear mounting hole 12 of the lower case 1
And to increase the impact strength of the lower case 1,
In order to prevent dust from entering, a minimum hole through which the gear portion passes is formed, and the rear gear 10 may be slid from the lower side of the lower case 1 to assemble. The rear gear 10 is made large enough to fit the head of the gear 10 so that the entire rear gear 10 can be inserted from the upper part of the lower case, so that all the gear parts can be assembled without moving the lower case 1.

The reason why the belt 11 is used for the rear gear 10 is that even if the rear gear 10 directly connected to the drive roller 14 fluctuates greatly, it can withstand some fluctuation. Next, the intermediate gear 13 is attached to the lower case 1 while passing the belt 11 through the intermediate gear 13. By doing so, the gear 9a of the front gear 9 comes into contact with the gear 13a of the intermediate gear 13, and when the drive roller 14 rotates forward, the rotating brush 15 rotates reversely. The gear ratio is adjusted so that the rotational torque does not exceed the driving roller 14 by the rotating brush 15, and the rotating brush 15 is decelerated by the rotating speed from the driving roller 14.

The coupling 4 is rotatably set by the lower case 1 and the upper rear case 26. A shutter 27 is coaxially mounted on the coupling shaft 4a, and is constantly pressed in the opening direction by the spring 8. Spring 8
Has one end in contact with a projection 28 provided on the lateral wall of the shutter, is wound around the shaft 4a of the coupling 4, and the other end is set in a slit portion 29 dug into the lower case.

Next, the driving roller 14, the rotating brush 15
Will be described with reference to FIGS. Drive roller 1
4. One end of each of the rotating brushes 15 is removably attached to a gear housing 53 formed by the lower gear housing 51 and the gear housing cover 16 of the lower case 1. The end is detachably attached to a bearing portion 54 composed of the lower bearing portion 52 and the bearing cover 36 of the lower case 1.

Next, the driving roller 14, the rotating brush 15
The attachment of each end to the gear housing 53 will be described. The convex portion 31 of the drive roller 14 is fitted into the concave portion 10c of the rear gear 10 marked with a plus sign. The metal shaft 30 has convex portions 3 at both ends.
It protrudes outside from 1 to guide at the time of fitting and prevent twisting. The rotating brush 15 fits the convex portion 33 on one side into the concave portion 9 c of the front gear 9 with a plus mark.

Next, the driving roller 14, the rotating brush 15
The attachment of each end to the bearing portion 54 will be described. One end of the driving roller 14 and one end of the rotating brush 15 are set in the plus-shaped recess 10c of the rear gear 10 and the plus-shaped recess 9c of the front gear 9, respectively.
The two sets of semicircular cuts 55 and 56 are set. Thereafter, the semicircular cuts 57 and 58 of the bearing cover 36 are formed.
Then, the convex portion 31 of the driving roller 14 and the plastic component 35 of the rotating brush 15 are sandwiched and fixed. The bearing cover 36 is fixed to a coin screw so that the coin groove opens the suction port when tightened. As a result, the coin groove also becomes an airway, and the dust in the corner is removed.

Next, the driving roller 14 and the rotary brush 15
Will be described with reference to FIGS. Drive roller 1
When the rotary member 4 comes into contact with the floor surface and is given a rotational force, the rotation is transmitted to the rear gear 10 coaxially configured with the rotary roller 14. The rear gear 10 and the drive roller 14 are detachable, and when set, the rear gear 10 and the drive roller 1
4 performs the same rotation. The rotation of the rear gear 10 is transmitted to the gear 13b of the intermediate gear 13 via the belt 11 meshed with the gear 10b of the rear gear 10.

The number of teeth of the gear 13b of the intermediate gear 13 is set larger than that of the gear 10b of the rear gear 10. The intermediate gear 13 is provided coaxially with an intermediate gear 13a, and the number of teeth of the intermediate gear 13a is set larger than that of the intermediate gear 13b to adjust the torque. The intermediate gear 13a operates by meshing with the front gear 9a. The front gear 9 is provided with a rotary brush 15 coaxially, the front gear 9 and the rotary brush are detachable, and when set, the front gear 9 and the rotary brush perform the same rotation. With this configuration, when the drive roller 14 rotates, the rotating brush 15 rotates in the reverse direction to the drive roller 14.

As described above, since the gear ratio is set so as to increase the torque of the driving roller 14 with respect to the rotating brush 15, when the rotating brush 15 scrapes the carpet on the carpet, it is driven by the rotating brush 15. Roller 14
Is prevented from rotating. Although the rotation speed of the rotating brush 15 is slower than the rotation speed of the drive roller 14, since the rotation direction is opposite as shown in FIG. 6, the effect of pushing the carpet on the carpet can be sufficiently obtained. In the case where the rotation speed is slow in the forward rotation, a nadell-like operation appears instead of a wedge operation, and the cleaning effect cannot be obtained.

Next, the operation when operating the suction tool 55 will be described with reference to FIGS. As shown in FIG. 7, when the user presses the hand part strongly, the force is transmitted through the pipe and the elbow 6 and transmitted to the suction device main body 55 through the shaft 4 a of the coupling 4. By arranging the shaft 4a and the axis of the rear wheel 3 coaxially, all the pressing force is absorbed by the rear wheel 3 which is a rotating body. At this time, since the pipe, the elbow 6, and the rotating brush 15 are not pushed perpendicularly to the floor surface and are pushed with an angle from the hand, the pressing force is changed to a rotating motion by the rear wheel 3 which is a rotating body, Suction port and drive roller 1
4. The effect on the rotating brush 15 and the front wheel 2 is reduced, and a stable operation is enabled without a decrease in air volume.
In such a configuration, even if there is an obstacle 39, no pressing force acts on the front wheel, and the vehicle can easily get over the front wheel.

FIG. 8 shows a case where the shaft 4a of the coupling 4 and the shaft of the rear wheel 3 are not coaxial as in a conventional suction tool. In this case, the user strongly presses the hand portion. In this case, the force is transmitted through the elbow 6 and the coupling 4, and the entire surface of the suction device main body 55 and the front wheel 2, the rear wheel 3,
The drive roller 14 and the rotating brush 15 are all pressed against the floor surface (flooring or carpet), the suction port is pressed against the carpet, and the air volume is reduced, so that dust cannot be removed. Further, when there is an obstacle 39 such as a threshold, it is not easy to get over because the front wheel 2 is pressed.

As described above, since the front wheel 2 and the rear wheel 3 are provided, and the shaft 4a of the coupling 4 and the shaft of the rear wheel 3 are coaxially arranged, the load applied to the drive roller 14 and the gear is constant. The rotating brush 15 can be stably rotated with less trouble, and the air volume can be stabilized.

Further, since the bearing 54 is separated from the gear housing 53 and the drive roller 14 and the rotary brush 15 can be removed simply by removing the bearing cover 36, dust can enter the drive unit such as the gear at the time of removal. Can be prevented,
Failure can be prevented.

Embodiment 2 FIG. 9 is a sectional view of a suction tool of a vacuum cleaner according to Embodiment 2 of the present invention. In the figure, the same parts as those in the first embodiment and FIG. Numeral 37 denotes a flocking part which is a braking means which is set in the lower case 1 so that the tip direction is shifted from the center of the drive roller 14 and the tip comes into contact with the surface of the drive roller 14 to brake. The flocked part 37 is made of, for example, hair of a nylon material, and includes a flocked part 37a having a slope 38 formed on the lower case 1 and a fixing part 37b.

In this configuration, the resistance is small when rotating in one direction, and a force (hereinafter referred to as elastic resistance) is exerted by the flocking in the reverse rotation to brake the drive roller, or
Fix it. However, on a floor with high resistance, such as on a carpet, it starts to rotate in both directions over the elastic resistance of the flocking brush. In addition, by forming the slope 38, the hair can be laid down, and the hair can be suppressed from unevenness and arranged in a substantially straight line, so that the elastic resistance is concentrated and a sufficient stopper function can be obtained even with a small amount of hair implantation. Further, even when the elastic resistance of the flocking of the flocking component 37 on the carpet is exceeded, the limit point is always constant because there is no variation in the bristle tips.
There is no operation that turns or does not turn, and stable braking can be switched.

As described above, efficient cleaning can be performed by adjusting the rotation of the rotary brush 15. In addition, the braking is variously changed depending on the bristle quality, diameter, length, and the number of bristle brushes of the flocking part 37. Can be. In the present embodiment,
The diameter of the driving roller 14 is about φ15, but the setting of the braking resistance varies depending on the diameter of the driving roller 14.

[0034]

As described above, according to the present invention, there is provided an electric motor having a driving roller supported by a lower case of a suction device main body and rotating in contact with a surface to be cleaned, and a rotary brush driven by the driving roller. In the suction device of a vacuum cleaner, the rotary brush is provided in front of the drive roller, and includes a rear wheel provided behind the drive roller, and a front wheel provided in front of the rotary brush. ,
The load applied to the drive roller and the drive unit is constant, there are few failures, the rotating brush can be rotated stably, and efficient cleaning can be performed.

Further, since a raised cloth is used for the driving roller, stable rotation can be performed and efficient cleaning can be performed.

Further, since the rotation axis of the coupling for connecting the suction tool body and the elbow and the rotation axis of the rear wheel are arranged coaxially, the load applied to the drive roller and the drive unit is constant, the failure is small, and the rotation is reduced. The brush can be rotated stably.

Further, a braking means for braking the driving roller is provided. The braking means comprises a flocking member which eccentricizes the direction of the braking force from the rotation center of the driving roller and comes into contact with the surface of the driving roller. By adjusting the rotation of, efficient cleaning can be performed.

In addition, since only one end of each of the rotating shafts of the driving roller and the rotary brush is detachably supported on the lower case of the suction device main body, dust is prevented from entering the driving portion. Can be.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 2 is an exploded development view of FIG.

FIG. 3 is an exploded development view of FIG. 1;

FIG. 4 is a perspective view of the lower case of the suction device of the vacuum cleaner according to Embodiment 1 of the present invention as viewed from the back side.

FIG. 5 is a cross-sectional view of the suction tool of the vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 6 is an explanatory diagram of the operation of the electric vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 7 is an operation explanatory view of the electric vacuum cleaner showing the first embodiment of the present invention.

FIG. 8 is an operation explanatory view of the electric vacuum cleaner showing Embodiment 1 of the present invention.

FIG. 9 is a sectional view of a vacuum cleaner according to a second embodiment of the present invention.

FIG. 10 is a sectional view of a conventional vacuum cleaner.

[Explanation of symbols]

50 suction tool body, 4 is coupling, 1 lower case, 2 front wheels, 3 rear wheels, 14 drive roller, 15
Rotary brush, 53 gear housing, 16 gear housing cover, 54 bearing, 52 lower bearing, 36 bearing cover, 9 front gear, 10 rear gear 10, 11 belt, 13 intermediate gear.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masahiro Yamazaki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Co., Ltd. Mitsubishi Electric Home Equipment Co., Ltd. F-term (reference) 3B061 AA32 AA35 AD05

Claims (5)

[Claims] 1. A suction device of a vacuum cleaner having a driving roller supported by a lower case of a suction device main body and rotating in contact with a surface to be cleaned, and a rotary brush driven by the driving roller, wherein the rotary brush is A suction tool for a vacuum cleaner, comprising: a rear wheel provided in front of the drive roller, provided behind the drive roller; and a front wheel provided in front of the rotary brush. 2. The suction device according to claim 1, wherein a brushed cloth is used for the driving roller. 3. The electric device according to claim 1, wherein a rotation axis of a coupling connecting the suction tool main body and the elbow and a rotation axis of the rear wheel are coaxially arranged. Vacuum cleaner suction tool. 4. A braking device for braking a driving roller,
3. A vacuum cleaner according to claim 1, wherein said braking means comprises a flocked member which makes the direction of the braking force eccentric from the rotation center of the driving roller and comes into contact with the surface of the driving roller. Utensils. 5. A supporting member for detachably supporting only one end of each rotation shaft of a driving roller and a rotary brush to a lower case of a suction tool main body.
The suction tool for a vacuum cleaner according to any one of claims 1 to 4.