JPH01277525A - Suction opening body of vacuum cleaner - Google Patents

Abstract

PURPOSE:To make a rotating brush to be fitted and removed easily and to reduce vibration and noise at time of rotation by giving an engagement face of a bearing support part to a bearing at one end part of a rotating brush a shape of taper, and by energizing the rotating brush in an opposite direction by the first energizing means and the second one respectively. CONSTITUTION:In a range of engagement of a bearing support part 71a, 71b with a bearing 63a, 63b positioned at one end part of a rotating brush 51, the shape of an engagement face of at least either side of the bearing support part or the bearing is taken the shape of taper becoming thin towards the outside of thrust direction of the brush 51. The rotating brush 51 is energized on a side of the above-mentioned taper shaped bearing support part or the bearing towards the outside of thrust direction by the first energizing means made of a belt 81 only in time of rotation of the rotating brush 51. Moreover, the brush 51 is energized by the second energizing means made of a spring 75 with a less lateral pressure than the above-mentioned first energizing means and in an opposite direction to the energized direction by the first energizing means continuously. As a result, vibration and noise attendant upon rotation of a rotating brush can be reduced.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a suction system for a vacuum cleaner that is afraid of rotating brushes, and particularly relates to a support structure for a freely rotating brush. Regarding.

(Prior Art) Conventionally, as described in, for example, Japanese Utility Model Application Publication No. 61-143559, a bearing whose outermost circumferential surface has a square square shape is rotated by a rotating shaft protruding from both end faces of a rotating brush. n6, and this bearing is removably fitted into a spiral bearing support part formed inside the suction port body, and the rotating brush is rotatably supported along with the bearing in a removable manner. The mouth body is known. In the conventional suction port body of this scale, the surfaces of the bearing and the bearing support part that fit into each other have a constant cross-sectional shape perpendicular to the thrust direction of the rotating brush, for example, a square prism as described above. 4'i which is the shape
It was ie.

By the way, the purpose of making the rotating brush removable is to make it easy to remove dust entangled with the rotating brush.However, in order to easily remove the rotating brush together with the bearing, it is necessary to remove the rotating brush from the bearing. When fitting with the support part, it is necessary that there be a certain amount of gap between the two parts. 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. Therefore, if there is a gap between the bearing and the bearing support as described above, the rotating brush As it rotates, unpleasant vibrations and loud noises are generated. 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 in turn causes trouble in attaching and detaching the rotating brush. Such a contradiction cannot be resolved as long as the bearing and the bearing support part have a rectangular square shape with a constant cross-sectional area.

(Problem to be Solved by the Invention) As mentioned above, in the suction unit 11 of the conventional vacuum cleaner, the fitting surface between the bearing and the bearing support part was a columnar surface, so the rotating brush FJ IIQ There was a problem in that it was not possible to achieve both ease of use and reduction of vibration and lj sound.

The present invention is an attempt to solve such problems, and it is possible to easily attach and detach the rotating brush, and to take pictures as the rotating brush rotates. The purpose of this invention is to provide a suction port for a vacuum cleaner that can reduce noise. Another object of this invention is to make the structure of the suction port body of this electric filtration machine into a cylinder.

[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 with a dust suction port provided on the lower surface, and a drive unit such as a turbine or an electric FIIm provided in the suction port body. a rotary brush provided in the suction port body facing the dust suction port and rotationally driven by the drive source; a bearing support provided in the suction port main body; a bearing that is freely fitted and supported and rotatably supports the end of the rotating brush described in item 11 above, within a range where the bearing fits into the bearing support portion located at one end of the rotating brush. The fitting surface of one or both of the bearing support portion and the bearing has a tapered shape that tapers outward in the thrust direction of the rotating brush, and the rotating brush is rotated from a driving source to the rotating brush. A first biasing means such as a transmitting belt biases the rotary brush in the direction outward in the thrust direction on the tapered bearing support portion or the bearing side only when the rotary brush is rotated. The second biasing means constantly biases with a side pressure smaller than that of the first biasing means and in a direction opposite to the biasing direction of the first biasing means.

Further, in a vacuum suction mouth body in which a bumper made of an elastic material is provided on the circular surface portion of the suction mouth body over almost the entire circumference, a second biasing means may be integrally provided with the bumper.

(Function) In the suction port body of the vacuum cleaner according to item 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. The dust is scraped out from the carpet, etc., and this dust is sucked in through the dust suction port. 1 At this time, lateral pressure is applied to the rotating brush by the first biasing means to the opposite side in the thrust direction on the tapered bearing support part or the bearing side, and this lateral pressure is applied to the opposite direction by the second biasing means. Since the side pressure is larger than the side pressure that is constantly applied, the rotating brush is eventually urged in the direction of urging by the first urging means. and,
At least one of the bearing support part or the bearing on the force direction side has a tapered shape that tapers outward in the thrust direction, so that when the bearing is pressed against the bearing support part by the lateral pressure. The fitting surface of the bearing is brought into close contact with the fitting surface of the bearing support portion without any gaps, thereby suppressing the noise caused by the rotation of the rotating brush. Also, after cleaning, etc., while the rotating brush is stopped, remove the rotating brush along with the bearing from the suction port body, and remove any I that is tangled with the rotating brush. 21 To remove dust, when the rotating brush is stopped, no lateral pressure is applied by the first biasing means, and the rotating brush is moved inward in the thrust direction on the side of the tapered bearing and bearing support by only the second F4 biasing means. Since the rotary brush is biased toward f1, the rotary brush moves in this direction, and a gap is created between the tapered bearing and the bearing support portion, eliminating any hindrance to the rj removal of the rotary brush.

Further, in the electric bi-removal type suction port body according to the second aspect, a part of the bumper made of an elastic body provided on the peripheral surface of the suction port body acts as a second urging means to bias the rotating brush.

(Embodiment) Hereinafter, the structure of an embodiment of the suction port body of the electric agitation machine of the present invention will be described with reference to FIGS. 1 to 4.

Reference numeral 1 designates a suction port body, which includes 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 1 part 2. It consists of The main body case 3 is composed of a lower case member 5 having an open upper 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 lower surface. The lid 4 has knobs (not shown) slidably provided at both side ends of the lid 4, and knobs (not shown) formed at both front side ends of the upper case member. They can be detachably attached to the main body case 3 by engaging with engagement protrusions (not shown) that are respectively engaged and detached. Further, bumpers 7 made of an elastic material such as rubber are provided on the front, both side and rear surfaces of the suction port body 1 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 each other.
A rotating brush chamber 15, a drive circuit chamber 16, a ventilation chamber 17, a motor storage chamber 18, and a belt chamber 19 are defined by 1.12.13.14. That is, a rotary brush chamber 15 is formed on the front side by a front and rear partition wall 11 that extends in the left-right direction and has a communication port 20 in the center, and a pair of left and right partition walls 12 that extend rearward from both side edges of the communication port 20. A drive circuit chamber 16, a ventilation chamber 17 facing the communication port 20, and a motor storage chamber 18 are formed on the rear side from left to right in FIG. 1, and are formed on one side of the rotating brush chamber 15. A belt chamber 19 is formed on the side of the rotating brush chamber 15 and the electric motor housing chamber 18 by the partition wall 13 formed on the side of the rotary brush chamber 15 and the partition wall 14 formed on one side of the electric motor housing chamber 18 .

Then, facing the rotating brush chamber 15, the suction port main body 1
A dust suction port 21 is formed on the lower surface of the rotary brush chamber 15, and the dust suction port 21 extends from the edge of the rotating brush chamber 15 on the belt chamber 19 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 heavy wheels 26 and a rear wheel 27 are respectively pivotally attached to the front and rear edges of the bottom of the lower case member 5 so as to be rotatable back and forth.

Reference numeral 31 denotes a connecting pipe provided at the rear of the suction port main body 1 so as to be rotatable by a predetermined angle, and includes a rotating pipe 32 whose rear part is formed into a substantially cylindrical shape, and a connecting pipe 31 that is rotatable in the circumferential direction at the rear of the rotating pipe 32. It consists of a bent cylindrical tangent pipe 33 which is freely fitted and connected. The front portion of the rotation tube 32 is formed into a semi-cylindrical portion 34 with an open front surface.
Support shaft portions 35 are formed on both side surfaces of 4 to protrude outward. 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. As a result, it is rotatably supported in the ventilation v17 in the front-rear direction, and the connecting pipe 33 projects rearward through the insertion hole 22 of the ventilation chamber 17.

Further, a connector 37 is fixed to the outer peripheral surface of the connecting tube 33, and one end of a cord 38 is connected to the connector 37. This cord 38 is guided into the drive circuit chamber 16 from the rear surface of the suction port main body 1, and the circuit board 3 supported and fixed within this drive circuit chamber 16.
It is electrically connected to an electronic component 40 mounted on 9.

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. Additionally, via lead $146, the code 3
8 and the circuit board 39 and the electric voltage J141 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, and a plurality of brush bristles 53 are arranged on the outer peripheral surface of the brush stand main body 52 in the longitudinal direction. They are planted side by side or in a spiral. Further, a rotating shaft 5 is provided at both ends of the brush stand main body 52.
4 are fixed coaxially and protruding outward, respectively. Furthermore, an end brush stand 55 is located on both end surfaces of the brush stand main body 52 and is separate from the brush stand main body 52.
．． 56 is fixed integrally and coaxially with the rotating shaft 54. A gear-shaped pulley 57 is formed on the outer circumferential surface of the right end brush stand 55 in the figure, and
A collar portion 58 is formed inside this 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 surface of the both end brush stands 55.5G via a washer 61. At the same time, cylindrical bearings 63a and 63b into which the cylindrical body 62 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 closed. 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 63b, and this circular flange portion 67 is connected to the rotating brush 5.
It is fitted into the circular recess 59 of No. 1 so as to be rotatably movable.

Furthermore, the right end face of the belt chamber 19 in the drawing, which faces the rotating brush chamber 15, and the left end face of the rotating brush chamber 15 in the drawing, have a side surface that is integral with a wall forming the side surface of the lower case 5. The U-shaped ribs 70a and 70b form groove-shaped bearing support portions 71a and 71b. 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 fitted from above has a constant cross-sectional shape perpendicular to the left-right direction, and The width in this direction is slightly larger than the width in the front-rear direction of the bearing 63a.

On the other hand, the tip side of the bearing support portion 71b on the left side of the figure into which another bearing G3b is inserted from above has a tapered portion 72 whose inner surface tapers outward in the left-right direction. is the tapered portion 66 of the bearing 63b.
The taper shape is the same as that of . Then, both bearings 63a and 63b of the rotary brush 51 are fitted into the two bearing holding parts 71a and 7Ib so as to be detachable and movable in the vertical direction, that is, in the radial direction of the rotary brush 51, while being prevented from rotating. is supported.

In this way, the rotating brush 51 is rotated into the rotating brush chamber 1.
It is rotatably supported within 5. Note that the end of the rotary brush 51 on the pulley 57 side is connected to the rotary brush chamber 15.
It is inserted into a holding hole 73 formed in the partition wall 14 on one side so as to be rotatable and vertically movable.

Furthermore, a movable piece 74 is provided at the base within the both bearing support portions 7Ib.
are fitted so as to be slidable left and right within a predetermined range, and the movable piece 7
Reference numeral 4 serves as a second urging means, and is always urged to the right in the drawing, that is, inward in the thrust direction of the rotating brush 51, by a spring 75 of C, and is brought into contact with the outer end surface of the bearing 63b in the thrust direction. Therefore, the rotating brush 51 is also always urged in the same direction. The spring 75 includes a boss 76 formed on a surface facing the movable piece 74 and the bearing support portion 71b in the thrust direction, respectively.
Both end portions are fitted and attached to 77 respectively.

In addition, when the spring 75 is at its natural length, the distance between the opposing surfaces of the movable piece 74 and the bearing support portion 71a on the right side in the figure is equal to
, 63b.

Roughly speaking, the rotating brush 51 located within the belt chamber 19
An endless timing belt 81, which also serves as a first urging means, is stretched between the pulley 57 of the electric motor 41 and the pulley 45 of the electric motor 41. This belt 81 is made of an elastic body such as rubber, in which a plurality of core wires made of glass tarpaulin twisted in the same direction are embedded in the circumferential direction. The direction of twist of the core wire is the direction of rotation when viewed from the front in the upper part. As will be explained in detail later, when the rotating brush 51 rotates, a lateral pressure f1 is applied to the rotating brush 51 by the belt 18, and this lateral pressure f1 is applied to the rotating brush 51 by the spring 75.
Therefore, the side pressure f2 applied to the rotating brush 51 is larger than the side pressure f2.

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 connecting tube 33 of the suction port body is fitted to the extension tube, and at the same time, the connector 37 provided on this connecting tube 33 is connected to the connector provided on the extension tube.
A power supply circuit within the vacuum cleaner body and a circuit within the suction port are electrically connected via a power supply line provided along the extension pipe and the hose.

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

The rotational force of the electric motor 41 is transmitted to the rotating brush 51 via a belt 81 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 blower inside the vacuum cleaner main body.
1, the rotating brush chamber 15, and the communication chamber 20. The dust is guided to the dust collector inside the vacuum cleaner body through the ventilation chamber 17, the connecting pipe 31, the extension pipe, and the hose.

When the belt 81 rotates in this way, since the core wire twisted in a certain direction is embedded in the belt 81, a force is also applied in the direction of movement in one of the thrust directions. Since the direction of twist of the core wire is clockwise when viewed from the direction in which the belt 81 rotates, the direction of this force is in the direction indicated by open phase A, that is, to the left in the figure. Furthermore, since the belt 81 is pressed against the flange 58 of the pulley 57 in this direction, the rotating brush 51 is moved outward in the thrust direction in the direction of the open phase A, that is, on the side of the tapered bearing G3a and the bearing support 71a. A lateral pressure f1 in the direction is always applied.

On the other hand, the rotating brush 51 has an open phase B due to the spring 75.
Although lateral pressure f2 is also applied in the direction indicated by 'C-, that is, in the opposite direction to the direction of the open phase A, since fl > f2, the rotating brush 51 is eventually urged in the direction of the open phase A.

Therefore, the bearing 63b on the left side in the figure is the bearing support part 71b.
4, the outer circumferential surface of the tapered portion 66, which is the fitting portion of the bearing 63b, matches the inner circumferential surface of the tapered portion 72, which is the fitting portion of the bearing support portion 7tb. It is tightly attached without any gaps. Therefore, these bearings 63b
There is no rattling between the bearing support portion 7Ib and the vibration and noise caused by the rotation of the rotating brush 51, and the usability is improved.

To remove dust attached to the rotating brush 51 after cleaning, etc., first remove the lid 4 while the electric motor 41 is stopped.
to open the opening 2 of the rotating brush chamber 15. Next, the bearings G3a and 63b are attached to the bearing support part 71a,
While pulling the rotating brush 51 upward from the rotating brush chamber 15 through the opening 2, the rotating brush 51 is removed from the bearings 63a, 6.
Remove along with 3b. By the way, when the electric motor 41 is stopped and the rotating brush 51 is stopped, the lateral pressure f1 by the belt 81 is O, so only 2 is applied by the lateral pressure by the spring 75, and the rotating brush 51 is urged in the direction of the open phase B. That will happen. As a result, as shown by the chain line in Figure 4,
The rotating brush 51 moves slightly to the right in the figure from the position where the tapered bearing 63b and the bearing support part 71b are in close contact, and a gap is created between the outer surface of the tapered part 66 of the bearing G3b and the tapered part 72 of the bearing support part 71b. arise. Therefore, the one-turn brush 51 can be easily removed. Moreover, as mentioned above, when the rotating brush 51 is stopped, a gap is naturally created between the bearing 63b and the bearing support part 71b, so there is no need for the user to move the rotating brush 51 in the thrust direction. It is. Then, egg dust attached to this rotating brush 51 is removed. Furthermore, after cleaning the rotating brush 51, the bearings G3a and 63b are moved to the bearing support portion 71a.

While fitting downward into the rotary brush chamber 15, the rotary brush 51 is reinstalled into the rotary brush chamber 15, and the lid body 4 is closed. At this time, the outer surface of the tapered portion 66 of the bearing 63b and the bearing support portion 71b are
Since the rotating brush 51 can be mounted so that a gap is created between the rotating brush 51 and the inner surface of the rotating brush 51, the rotating brush 51 can be mounted easily.

Thus, according to the above configuration, the operation for attaching and detaching the rotating brush 51 is similar to that of the suction port body of a conventional vacuum cleaner in which a gap is provided between the bearing whose fitting surface is a cylindrical surface and the bearing support part. In addition, vibration and noise accompanying the rotation of the rotating brush 51 can be reduced.

FIG. 5 shows another embodiment of the present invention, in which a tongue portion 86 integrally formed with the bumper 7 is
It is located at the base of the bearing support part 7Ib having the tapered part 72 and is in contact with the outer end surface of the bearing G3b, and serves as a second biasing means to constantly urge the rotating brush 51 in the direction of the open phase B, that is, toward the belt 81 side. It is strong.

According to this configuration, when the number 11 hits furniture, etc.! Since the second biasing means is integrated into the bumper 7 intended for urban use, there is no need for additional parts compared to conventional suction ports, there is no deterioration in ease of assembly, and there is no increase in cost. Nor.

In the above embodiment, both the bearing 63b and the bearing support portion 71b into which the bearing 63b is fitted are tapered, but even if only one of them is tapered, considerable effects can be obtained.

Further, the drive source that rotationally drives the rotating brush 51 is not limited to the electric motor 41, and may be an air turbine rotated by the suction airflow.

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

In the suction port body of the vacuum cleaner according to claim 1, at least one fitting surface between the bearing support portion located at one end of the rotating brush and the bearing is formed into a tapered shape that tapers outward in the thrust direction. The first biasing means biases the tapered bearing support portion or the bearing side in the direction outward in the thrust direction only during rotation, and the second biasing means applies a side pressure smaller than that of the first biasing means. Since the bearing is always biased in the opposite direction to the above direction, the bearing is tightly attached to the bearing support portion without any gaps when the rotating brush rotates, and when the rotating brush is removed together with the bearing, the bearing and the bearing support portion are closely connected. A gap is created between the rotating brushes, and therefore, vibration and noise caused by the rotation of the rotating brush can be reduced without impairing the operability of attaching and detaching the rotating brush.Furthermore, when attaching and detaching the rotating brush, that is, when the rotating brush stops, Sometimes a gap naturally occurs between the bearing and the bearing support, making it easier to attach and detach the rotating brush.

Further, in the suction port body of the vacuum cleaner according to the second aspect, since the second biasing means is integrally provided in the bumper, the number of parts is reduced, the construction is simplified, and the ease of assembly is improved.
Costs go down.

[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. FIG. 4 is a schematic exploded perspective view of the vicinity of the bearing; FIG. 4 is a schematic plan view of the vicinity of one of the bearings excluding the lid; FIG. 5 is a front view of the vicinity of the end of a rotating brush showing another embodiment of the present invention. It is a front view. 1. Suction port body, 7. Bumper, 21. Dust suction port,
41... Electric motor as a driving source, 51... Rotating brush,
63a, 63b -- Bearing, 71a, 71b
--Bearing support portion, 75...Spring serving as second biasing means, 81...Belt serving also as first biasing means, 86...
A portion of the tongue as a second biasing means.

Claims (2)

[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. The rotary brush is biased by the first biasing means in a direction outward in the thrust direction on the tapered bearing support portion or the bearing side only when the rotary brush is rotated. A suction port body for a vacuum cleaner, characterized in that the suction port body of a vacuum cleaner is always biased by a second biasing means with a side pressure smaller than that of the first biasing means and in a direction opposite to the biasing direction by the first biasing means. (2) A bumper made of an elastic body is provided on the peripheral surface of the suction port body over almost the entire circumference, and a second
2. The suction port body for a vacuum cleaner according to claim 1, further comprising a biasing means integrally provided therein.