JPH01232918A - Suction port body for vacuum cleaner - Google Patents

Abstract

PURPOSE:To easily remove and mount a rotating brush and to reduce a vibration and a noise according to the rotation of the rotating brush by tapering at least one of a bearing support part or a bearing in the direction outward of a thrusting direction. CONSTITUTION:In order to remove dust adhering to a rotating brush 51, a cover body 4 is removed, the opening part 2 of a rotating brush chamber 15 is opened and the rotating brush 51 is removed together with bearings 63a, 63b. At this time, when the rotating brush 51 is slightly moved in parallel rightward from a position at which the bearing 63a of a tapered form is tightly contacted with a bearing support part 71b, there is a gap generated between the external face of the taper part 66 of the bearing 63b and the internal part face of the bearing support part 71b. Accordingly, the rotating brush can be easily removed. After a cleaning, while the bearings 63a, 63b are fitted into the bearing support parts 71a, 71b downward, the rotating brush 51 may be mounted again on the rotating brush chamber 15. In such a constitution, the operability of mounting and removing the rotating brush 51 can be obtained and a vibration and a noise according to the rotation of the rotating brush 51 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a suction port body for a vacuum cleaner equipped with a rotating brush, and particularly relates to a support structure for a rotating brush that can be freely rotated.

(Prior Art) Conventionally, as described in, for example, Japanese Utility Model Application Publication No. 143559/1983, a bearing whose outermost circumferential surface is in the shape of a square prism is rotatably attached to a rotating shaft protruding from both end faces of a rotating brush. and the bearing is removably fitted into a groove-shaped bearing support formed in the suction port main body, so that the rotary brush can be rotated and the vacuum cleaner can be removably supported together with the bearing. A suction port body is known. In a conventional suction port body of this type, the surfaces of the bearing and the bearing support portion that fit into each other have a constant cross-sectional shape perpendicular to the thrust direction of the rotating brush, for example, a square shape as described above. The structure was in the shape of a company.

By the way, the reason why the rotating brush is made to be freely MIL12 is to make it possible to easily remove dust entangled with the rotating brush, but in order to easily attach and detach the rotating brush together with the bearing, it is necessary to remove the bearing and the bearing support. It is necessary that there be a certain amount of gap between the two when fitting with the part.

On the other hand, rotating brushes are molded products, and eccentricity between the central axis of the rotating brush and the rotating shaft cannot be avoided, so if there is a gap between the bearing and the bearing support as described in F. , Unpleasant vibrations and loud noises occur as the rotating brush rotates. In order to reduce this vibration and noise, it is necessary to make the gap between the bearing and the bearing support part as small as possible, but this will cause problems in attaching and detaching the rotating brush. Such a contradiction cannot be resolved as long as the fitting surface between the bearing and the bearing support part has a square prism shape with a constant cross-sectional area.

(Problems to be Solved by the Invention) As mentioned in F, in the suction port body of the conventional vacuum cleaner, the fitting surface between the bearing and the bearing support part was a columnar surface, which made it difficult to attach and detach the rotating brush. There was a problem in that it was not possible to achieve both ease of use and reduction of vibration and noise.

The present invention aims to solve these problems, and aims to provide a suction port body for a vacuum cleaner that makes it easy to attach and detach a rotating brush and that can reduce vibration and noise caused by the rotation of the rotating brush. That is.

[Structure of the invention]

(Means for Solving the Problems) The suction port body of the vacuum cleaner of the present invention includes a suction port body in which a dust suction port is provided on the lower surface, and a drive source such as a turbine or an electric motor provided in the suction port body. a rotating brush provided in the suction port body facing the dust suction port and rotationally driven by the drive source; a bearing support portion provided in the suction port body; and a rotating brush that is removably fitted into the bearing support portion. and a bearing that rotatably supports the end of the inter-plane rotating brush, and the bearing support located at one end of the rotating brush fits within the range where the bearing fits. The shape of the fitting surface of one or both of the and the bearing is tapered toward the outside in the thrust direction of the rotating brush, and rotation is transmitted from the drive source to the rotating brush. The tapered bearing support portion or the bearing side is biased outward in the thrust direction by a biasing means such as a belt.

(Function) In the suction port body of the vacuum cleaner according to claim 1 of the present invention, the rotating brush rotatably supported by the bearing fitted and supported by the bearing support portion of the suction port body is rotationally driven by the drive source. Dust is scraped out from carpets, etc., and this dust is sucked in through the dust suction port.

At this time, the biasing means applies lateral pressure to the rotating brush in the direction outward in the thrust direction on the tapered bearing support part or the bearing side, but at least one of the bearing support part or the bearing is in the direction outward in the thrust direction. Due to the tapered shape, when the bearing is pressed against the bearing support part by the lateral pressure, the fitting surface of the bearing is tightly fitted to the fitting surface of the bearing support part without any gap, and the rotating brush is Vibration and noise associated with rotation are suppressed. Also, after cleaning, etc., remove the rotating brush along with the bearing from the suction port body to remove dust entangled with the rotating brush.
Then, by slightly shifting the rotating brush from the position where the tapered bearing and the bearing support part are in close contact in the direction inward in the thrust direction on the side of these bearings and the bearing support part, there is a gap between the bearing and the bearing support part. A gap is created between the brushes, and there is no problem when attaching and detaching the rotating brush.

(Embodiment) Hereinafter, the structure of an embodiment of the electric cleaning-like suction port body of the present invention will be described with reference to the drawings.

Reference numeral 1 designates a suction port body, which is comprised of a main body case 3 having an opening 2 formed on the front side of the upper part, and a case-like lid body 4 which is detachably attached to the main body case 3 and has an open bottom surface for opening and closing the opening 2. It has become. The main body case 3 is composed of a lower case member 5 having an open top surface, and an upper case member (not shown) connected to the rear portion of the upper surface of the lower case member 5 with screws or the like and having an open bottom surface. The lid body 4 has knobs slidably provided at both side ends of the lid body 4 (see t!), and is formed at both front side ends of the upper case member. The knobs can be detachably attached to the main body case 3 by engaging with engagement protrusions (not shown) that are respectively engaged and detached. Bumpers 7 made of an elastic material such as rubber are provided on both sides and the rear surface to protrude outward.

The bumper 7 is sandwiched between the lower case member 5, the upper case member, and the lid 4.

Further, inside the suction port main body 1, partition walls 1 are formed integrally with both the case members 5 and joined to the casing.
1.12.13.14, the rotating brush chamber 15, drive circuit chamber 16, ventilation chamber 17, motor storage chamber 18, and bell 1
- chamber 19 are partitioned. That is, the front and rear partition walls 11 extend in the left-right direction and have a communication port 20 formed in the center.
A rotating brush chamber 15 is formed on the front side, and extends rearward from both side edges of the communication port 20.A pair of left and right partition walls 1
2, a driving circuit chamber 16, a ventilation chamber 17 facing the communication port 20, and an electrical storage chamber 18 are formed in the rear side from left to right in FIG. 1, and the rotating brush chamber 15 A belt chamber 19 is formed on the side of the rotating brush chamber 15 and the motor housing chamber 18 by the partition wall 13 formed on one side and the partition wall 14 formed on the - side of the motor housing chamber 18. ing.

Then, facing the rotating brush chamber 15, the suction port main body 1
A dust suction port 21 is formed in the lower surface of the rotary brush chamber 15, and this dust suction port 21 extends from the edge of the rotating brush chamber 15 on the belt v19 side to the opposite edge.

Further, the opening 2 extending over the entire upper surface on the front side of the front and rear partition wall 11 also faces the rotating brush chamber 15. Furthermore, an insertion hole 22 is formed in the rear surface of the suction port body 1 facing the ventilation chamber 17 .

Further, a pair of left and right front wheels 26 and a pair of rear wheels 2γ are respectively pivotally attached to the surface edge and rear edge of the bottom of the lower case member 5 so as to be rotatable back and forth. 131 is the suction port body 1
A connecting pipe provided at the rear part of the rotary tube 32 to be rotatable at a predetermined angle, the rear part of which is formed into a substantially cylindrical shape, and this rotary pipe 3
The connecting tube 33 has a bent cylindrical shape and is fitted and connected to the rear part of the connecting tube 2 so as to be rotatable in the circumferential direction. The front portion of the rotation tube 32 is formed into a semi-cylindrical portion 34 with an open front surface, and a support shaft portion 35 is formed on both side surfaces of the semi-cylindrical portion 34 to protrude outward. There is. The semi-cylindrical portion 34 has its supporting shaft portions 35 on both sides rotatably fitted into bearing holes 36 formed at the joints of the partition walls 12 on both sides of the ventilation chamber 17. By,
It is rotatably supported in the ventilation chamber 11 in the front and back direction, and the connecting pipe 33 is connected to the insertion hole 22 of the ventilation chamber 11.
It projects backwards through the.

Furthermore, a connector 37 is fixed to the outer peripheral surface of the connecting tube 33, and a cord 38 is connected to the connector 31.
One end is connected. This cord 38 is led into the drive circuit chamber 16 from the rear surface of the suction port body 1, and is electrically connected to an electronic component 40 mounted on a circuit board 39 supported and fixed within this drive circuit chamber 16. It is connected to the.

Further, in the motor storage chamber 18 of the suction port body 1, a motor 41 as a drive source is mounted on a pair of rubber supports 42.4.
3, and a rotating shaft 44 of this electric motor 41 projects into the belt chamber 23. A gear-shaped pulley 45 is fixed to this rotating shaft 44. Furthermore, the cord 38 is connected via the lead wire 4G.
The circuit board 39 and the electric motor 1E141 are electrically connected.

Reference numeral 51 denotes a rotating brush, which has a substantially cylindrical brush stand main body 52 with the left-right direction as the thrust direction and the longitudinal direction. They are planted side by side or in a spiral. Furthermore, rotating shafts 4 are fixed to both ends of the brush stand body 52 coaxially and projecting outward. Furthermore, an end brush stand 5 is located on the sides of both end surfaces of the brush stand main body 52 and is separate from the brush stand main body 52.
5.56 is fixed integrally and coaxially with the rotation @54. A gear-shaped pulley 57 is formed on the outer circumferential surface of the end brush stand 55 on the right side in the drawing, and a collar portion 58 is formed inside the pulley 57. Furthermore, circular recesses 59 centered around the rotating shaft 54 are formed on the outer end surfaces of the brush stands 55 and 56 in the thrust direction. .

Further, a cylindrical body 62 made of a sintered metal or the like is rotatably and slidably fitted to the rotary shaft 54 protruding from the outer end surfaces of the brush stands ss and be at both ends with a washer 61 interposed therebetween. At the same time, cylindrical bearings 63a and 63b into which the cylindrical body G2 is press-fitted are rotatably fitted. Note that this bearing 63a.

The claw portion 64 integrally formed on the inner circumferential surface of the rotating shaft 54 is engaged with the small diameter portion 65 formed on the outer circumferential surface of the tip end of the rotating shaft 54, so that the bearing 6
3a, 63b and the cylindrical body 62 are prevented from being removed. Of the two bearings 63a and 63b, the bearing 63a on the right side in the drawing has an outer surface shape of a regular square prism whose thrust direction is the thrust direction of the rotating brush 51. On the other hand, the outer surface shape of the bearing 63a on the left side of the figure has a square cross section perpendicular to the thrust direction of the rotating brush 51, but at least the tip side on the outside in the thrust direction has a tapered shape that becomes narrower toward the outside in the thrust direction. It has a tapered portion 66. Note that both the bearings 63a,
A circular flange portion 67 is formed at the base end of the brush 63b, and this circular flange portion 67 is fitted into the circular recess 59 of the rotating brush 51 so as to be rotatable and slidable.

Further, a wall forming a side surface of the lower case 5 and a wall forming a side surface of the lower case 5 are provided on the right end surface of the belt chamber 19 facing the rotating brush chamber 15 and the left end surface of the rotating brush chamber 15 as shown in the drawing.
- On the side surface of the body, groove-shaped bearing support portions 71a and 71b are formed by U-shaped ribs 70a and 70b. Of these two bearing support parts 71a and 71b, the inner surface shape of the bearing support part 71a on the right side in the figure into which the bearing 63a is blown from above has a constant cross-sectional shape perpendicular to the left-right direction, and The width in the front and rear directions is slightly larger than the width in the front and rear direction of the bearing 63a. On the other hand, the inner surface of the bearing support portion 71b on the left side in the figure into which another bearing 63b is fitted from above is a J-bar shape that tapers outward in the left-right direction, and this tapered shape is similar to that of the bearing G3b. The tapered shape is the same as that of the tapered portion 66. Then, the both bearing holding parts 71a.

Bearings 63a for both cylinders 2 of the rotary brush 51 are disposed within 11b.

63b is fitted and supported so as to be detachable and movable in the vertical direction, that is, in the radial direction of the rotating brush 51, while being prevented from rotating. In this way, the rotating brush 51 is rotatably supported within the rotating brush chamber 15. Note that the end of the rotating brush 51 on the pulley 51 side is
It is inserted into a holding hole 72 formed in the partition wall 14 on one side of the rotating brush chamber 15 so as to be rotatable and vertically movable.

Further, the distance between the opposing inner surfaces of the two bearing support parts 71a and 71b is slightly larger than the distance between the outer end surfaces of the two bearings 63a and 63b of the rotating brush 51.

A rotating brush 51 located within the belt chamber 19
An endless timing belt 76, which also serves as a biasing means, is stretched between the pulley 57 of the electric power generator 41 and the pulley 45 of the electric power jet machine 41. The belt 76 is made of an elastic body such as rubber, in which a plurality of core wires made of glass TIN twisted in the same direction are embedded in the circumferential direction. The direction of twist of the core wire is clockwise when viewed from the front in the upper part.

Next, the operation of this embodiment will be explained.

During cleaning, the suction port is connected to the main body of the vacuum cleaner via a hose, an extension pipe, or the like.

At this time, the connection pipe 33 of the suction port body is fitted to the extension pipe, and in conjunction with this, the connector 37 provided on the connection pipe 33 is connected to the connector provided on the extension pipe,
The power supply circuit within the vacuum cleaner body and the circuit within the suction body are electrically connected via the extension tube and the power supply line provided along the hose.

During cleaning, the user holds the grip of the hose and slides the suction port body 1 on the surface to be cleaned, but at this time, the rotating tube 32 rotates up and down, and the connecting tube 33 rotates. By applying horizontal rotation to the hand, the suction port body 1 can be moved easily.

Then, the rotational force of the electric EA 41 is transmitted through a belt 76 stretched between a pulley 45 fixed to the rotating shaft 44 and a pulley 57 fixed to the rotating brush 51.
This rotating brush 51, which rotates counterclockwise when viewed from the right in the figure, scrapes up dust from a carpet or the like. Then, the dust that has been scraped up is removed from the dust suction port 2 of the suction port main body 1 by the drive of the electric feeder inside the vacuum cleaner main body.
1 and guided to the dust collection chamber in the vacuum cleaner body via the rotating brush chamber 15, the communication port 20, the ventilation chamber 17, the connecting pipe 31, the extension pipe, and the hose.

When the belt 76 rotates in this way, a force is applied in the direction of movement in one of the thrust directions because the core wire twisted in a certain direction is embedded in the belt γG. The direction of this force is in the direction indicated by arrow A, that is, to the left in the figure, since the direction in which the core wire is twisted is clockwise when viewed from the direction in which the belt 7G rotates. Also, since the belt 76 is pressed against the collar 58 of the pulley 57 in this direction, the rotating brush 51 has a thrust direction outward in the direction of the arrow A, that is, on the side of the tapered bearing 63a and the bearing support 71a. Lateral pressure in the direction is constantly applied.

Then, due to this side pressure, the bearing 63b on the left side in the figure is pressed against the bearing support part 71b, and as shown by the solid line in FIG. The fitting surface matches the tapered inner circumferential surface of the fitting surface and is tightly fitted without any gaps. 1. Therefore, no rattling occurs between the bearing 63b and the bearing support portion 71b, and vibration and noise accompanying the rotation of the rotary brush 510 are reduced, improving usability.

To remove dust attached to the rotating brush 51 after cleaning, etc., first remove the lid 4 and open the opening 2 of the rotating brush chamber 15 while the electric motor 1f 141 is stopped. Then, the bearings 63a and 63b are attached to the bearing support) 4 parts 7t.
a. While handling upward from 71b, rotate the rotating brush chamber 1.
5 through the opening 2 and the rotating brush 51 is connected to the bearing 63a.
, remove together with 63b. At this point, as shown by the chain line in FIG. 4, if the rotating brush 51 is slightly translated in parallel to the right in the figure from the position where the tapered bearing 63b and the bearing support part 71b are in close contact, If it is shifted to the right, a gap will be created between the outer surface of the tapered portion 66 of the bearing 63b and the inner surface of the bearing support portion 71b. Therefore, the rotating brush 51 can be easily removed. Then, dust attached to this rotating brush 51 is removed. Furthermore, after cleaning the rotating brush 51, the bearings 63a and 63b are moved to the bearing support portion 71a.

While fitting downward into the rotary brush 71b, the rotary brush 51 is reattached to all rotary brushes 15, and the lid body 4 is closed. At this time, the outer surface of the tapered portion 66 of the bearing f33b and the bearing support portion 71
Since the rotating brush 51 can be mounted so that a gap is created between it and the inner surface of b, the rotating brush 51 can be mounted easily.

Thus, according to the above configuration, the attachment and detachment of the rotating brush 51 is similar to the suction port body of the conventional electric h1 filter in which a gap is provided between the bearing whose fitting surface is a cylindrical surface and the bearing support part. Not only can operability be obtained, but also vibration and noise caused by the rotation of this rotating brush 51 can be reduced.

Moreover, since there is no need to increase the number of parts compared to the conventional suction port body, there is no decrease in assembly efficiency and no increase in cost.

In addition, in the above embodiment, the bearing 63b and this bearing 133b
Although both of the bearing support portion 71b and the bearing support portion 71b fitted therein are tapered, a considerable effect can be obtained even if only one of them is made tapered. Also, the bearing 63 on the belt 76 side. l
The bearing support portion 71a may also have a tapered shape.

Furthermore, the rotating brush 51 may be biased in the thrust direction by another spring or the like instead of the belt 76, but if this structure is adopted, the rotating brush 51
It becomes a little difficult to attach and detach.

Further, the drive source for rotationally driving the rotating brush 51 is not limited to the electric motor 41, but the motor 41 rotated by the suction airflow.
It may also be an atturbine or the like.

〔Effect of the invention〕

According to the present invention, at least one fitting surface between the bearing support portion and the bearing located in a part of the rotating brush is formed into a tapered shape that becomes narrower toward the outer side A in the thrust direction, and the rotating brush has a tapered shape. Since the bearing support part or the bearing side is biased outward in the thrust direction, the bearing is tightly attached to the bearing support part without any gap when the rotating brush rotates, and
When attaching and detaching the rotating brush together with the bearing, a gap can be created between the bearing and the bearing support, so that vibrations caused by the rotation of the rotating brush can be prevented without impairing the operability of attaching and detaching the rotating brush. , can reduce noise. Moreover, compared to the suction port body of conventional vacuum cleaners,
Since there is no need to increase the number of parts, there is no decrease in assembly efficiency or increase in cost.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view in the plane direction showing one embodiment of the suction port body of the vacuum cleaner of the present invention, Fig. 2 is a cross-sectional view in the front direction near the end of the rotary brush as above, and Fig. 3 is a sectional view in the front direction of one of the bearings as in the above. FIG. 4 is a schematic exploded perspective view of the vicinity, and FIG. 4 is a schematic plan view of the vicinity of one of the bearings with the cover removed. DESCRIPTION OF SYMBOLS 1... Suction port main body, 21... Dust suction port, 41... Electric motor as a drive source, 51... Rotating brush, 63a. 63b -- Bearing, 71a, 71b...Bearing support part, 7
6. A belt that also serves as a biasing means. Senior A1

Claims (1)

[Claims] (1) A suction port body with a dust suction port provided on the bottom surface, a drive source provided within the suction port body, and a drive source provided within the suction port body facing the dust suction port and rotated by the drive source. a rotating brush, a bearing support provided on the suction port body, and a bearing that is removably fitted and supported by the bearing support and rotatably supports an end of the rotating brush; The shape of the fitting surface of at least one of the bearing support part and the bearing located at one end of the rotating brush is narrowed outward in the thrust direction of the rotating brush within the range where the bearing support part and the bearing fit together. What is claimed is: 1. A suction port body for a vacuum cleaner, characterized in that the rotary brush has a tapered shape, and the rotating brush is biased outward in the thrust direction on the tapered bearing support portion or bearing side by a biasing means.