JPS6397127A - Suction port body of electric cleaner - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 having a rotating brush, and particularly relates to a structure that supports the rotating brush in a vertically movable manner. .

(Prior Art) An example of a suction port body of a conventional vacuum cleaner will be explained with reference to FIG.

In the suction port body 1, spiral bearing portions 2 are formed on both sides of a suction port (not shown) opened on the lower surface of the suction port body 1. A bearing 3 having a square side surface is fitted and held so as to be vertically movable. Both ends of a rotating brush 4 for scraping dust from a carpet or the like are rotatably supported by these bearings 3, respectively. In addition, the electric ω+I provided in the suction port body 1
A timing belt 9 for transmitting rotation is stretched between a gear-shaped pulley 7 fixed to a rotating shaft 6 of a rotary drive body such as a5, and a gear-shaped pulley 8 fixed to a rotating brush 4. Conventionally, the bearing portion 2 has a shape that is straight and slightly inclined downward and forward in the height direction.

As mentioned above, the purpose of making the bearing 3 freely movable in the upward direction is to reduce the load that the rotating brush 4 receives from the carpet by moving the rotating brush 4 in the -V direction when the carpet has long bristles. That's true. However, with the conventional shape of the bearing portion 2, the distance between the rotating shaft 6 of the electric motor 5 and the central axis of the rotating brush 4, that is, the distance between the shafts, is not constant. The driving force 1 to 4 transmitted to the motor 4 changes.

Further, when the rotary driving body is the electric motor 5, the rotary brush 4 tends to rotate while being located at a place where the load applied to the electric motor 5 is small, that is, a place where the inter-shaft path -1 is shortened. However, with the conventional shape of the bearing portion 2, the distance between the shafts is not constant, so the rotating brush 4 tends to always rotate at a constant height. For example, in the J suction port body shown in FIG. 6, the rotary brush 4 is located at the lower part of the shaft path fil! Since the inter-shaft path M12 is larger when the brush is positioned in the 10th position than in the + position, the rotary brush 4 tends to rotate in a lower position. Therefore, it becomes impossible to sufficiently avoid the load caused by the carpet.

In addition, when the timing belt 9 is used as a rotation transmission belt, if the rotating brush 4 is locked between the towels and the 4i, especially when the distance between the shafts is short, the gear-shaped Jumping occurs between the peaks of the pulleys 7 and 8 and the timing belts 9 and 111 of the timing belt 1, and the peaks of the timing belt 9 are particularly worn.

(Problems to be Solved by the Invention) As mentioned above, in the suction port body of the conventional vacuum cleaner, the bearing part that keeps the bearing of the rotating brush in the "downward position" has a linear shape. As a result, the distance between the shafts of the rotating brush and the rotating drive body changes, and as a result, stable driving torque is not transmitted to the rotating brush, and the rotating brush does not move smoothly, causing damage to the carpet. There was a problem in that the load on the rotating brush could not be sufficiently reduced.

The present invention aims to solve these problems, and even if the rotating brush moves up and down, the distance between the axes of the rotating brush and the rotating drive body is maintained as one, so that the rotating brush can move smoothly. The object of the present invention is to provide a suction port body for a vacuum cleaner that can be operated manually and a stable driving force of 1 to 100 mph is transmitted to the rotating brush. The suction port body of the vacuum cleaner of the present invention consists of a lower case with a suction port opened at the bottom and a lower case, and a bearing portion is inserted between the suction port body and a connecting pipe provided at the rear. Setting (
), bearings are held in these bearing parts so as to be able to move up and down, and both ends are rotatably supported by these bearings, and a rotating brush is disposed in the suction body facing the suction port, and, A rotary drive body for driving the rotary brush is provided in the suction port main body, and a belt for transmitting rotation is hung between a rotation shaft of the rotary drive body and a pulley provided on the rotary brush, and further, The bearing portion that holds the bearing of the rotating brush is moved in the height direction around the rotating shaft of the rotary drive body so that the distance between the central axis of the rotating brush and the rotating shaft of the electric motor is always kept constant. It has a circular arc shape.

(Function) In the suction port body of the vacuum cleaner of the present invention, driving torque is transmitted from the rotary drive body to the rotary brush by the belt stretched between the rotation shaft of the rotary drive body and the pulley of the rotary brush.
The rotating brush rotates to remove dust from carpets, etc. Then, in order to keep the load that the rotating brush receives from the carpet almost constant, the bearing that supports the rotating brush moves up and down in the bearing part depending on the quality of the pile of the carpet, etc. Although it moves downward, the bearing part forms an arc centered around the rotating shaft of the rotary drive body, so the rotating brush moves in an arc in the vertical direction, and the center axis of the rotary brush and the rotary drive body move downward. The distance between the shaft and the rotating shaft of the rotary brush is always kept constant.In this way, no matter what position the rotating brush rotates, the distance between the shafts is constant, so the information is transmitted from the rotating drive body to the rotating brush. The driving torque is also constant, and the rotating brush moves up and down smoothly.

(Example) Hereinafter, the structure of an example of the suction port body of a vacuum cleaner of the present invention will be described based on FIGS. 1 to 5.

Reference numeral 11 denotes a suction port body, which is composed of a lower case 12 with an open top surface, and an upper case 13 with an open bottom surface, which is connected and fixed to the rear of the top surface of the lower case 12 with screws, etc.
Further, a lid body 14 is detachably connected to the front surface of the upper case 13 from the front surface of the first case 12 .

Further, a bumper 15 is sandwiched between the peripheral edge of the lower case 120 and the peripheral edge of the upper case 13 or the lid 14.

Inside the suction port main body 11, a rotating brush chamber 20 and a substrate storage chamber 21 are provided by partition walls 16, 17, 18, and 19 that are integrally formed with both cases 12 and 13 and are joined to each other. , general room 22 and electric motor storage room 23
and a belt chamber 24 are defined. That is, the rotary brush chamber 2 is connected to the front side by the front and rear partition wall 16 which includes the front surface of the upper case 13 and has the communication port 25 in the center thereof.
A pair of left and right partition walls 17 extending rearward from both side edges of the communication port 25 form a board storage chamber 21, a ventilation chamber 22 facing the communication port 25, and a motor storage chamber that are lined up laterally on the rear side. 23, and partition walls 18 formed on both sides of the rotating brush chamber 200 and a partition wall 19 formed on one side of the motor storage chamber 23,
A belt chamber 24 is formed on the side of the rotating brush chamber 20 and the motor storage chamber 23. A suction port 2 is provided on the lower surface of the suction port main body 11 facing the rotating brush chamber 20.
6 is formed as an opening, and an insertion hole 27 is formed in the rear surface of the suction port body 11 facing the ventilation chamber 22.

Reference numeral 31 denotes a connecting pipe, which has a substantially cylindrical connecting pipe part 32 at the rear and a semi-cylindrical part 33 which communicates with this connecting pipe part 32 and has an open front surface at the front. Support shaft portions 34 are formed on both side surfaces of the cylindrical portion 33 to protrude outward. This semi-cylindrical portion 33 has support shaft portions 34 on both sides thereof connected to the partition walls 17 on both sides of the ventilation chamber 220.
By being rotatably fitted into a bearing hole 35 formed in the ventilation chamber 22, the connecting pipe portion 32 is rotatably supported in the front and rear directions within the ventilation chamber 22.
It protrudes rearward through the second insertion hole 27.

Further, an electric motor 41 serving as a rotational drive body is supported and fixed in the electric M sending machine storage chamber 23 of the suction port main body 11. A rotating shaft 42 of this electric motor 41 projects into the belt chamber 24, and a gear-shaped pulley 43 is fixed to this horizontal, laterally oriented rotating shaft 42.

Furthermore, in the board storage chamber 21 of the suction port main body 11,
A circuit board 45 on which an electronic component 44 for controlling the electric motor 41 is mounted is supported and fixed, and a power supply board 46 electrically connected to the circuit board 45 is located on the rear surface of the board storage chamber 23. It is led out from the suction port main body 11.

Furthermore, spiral bearing portions 53 are formed at both ends of the rotating brush chamber 20 of the suction port body 11 by a pair of front and rear walls 51 and 52 integrally formed with the upper case 12. The opposing front and rear surfaces of these bearing portions 53 are formed in an arc shape centered on the rotating shaft 42 of the electric motor 41 in the height direction when viewed from the side.

Reference numeral 56 denotes a rotating brush, which is formed into a substantially cylindrical shape, and has a plurality of bristles 57 planted on its outer peripheral surface. Also,
A central shaft body 58 is provided protruding from both end faces of the rotating brush 56, and a gear-shaped pulley 59 is fixed to one end of the rotating brush 56.

Further, reference numeral 61 denotes a bearing, which, as shown in FIG. This collar part 6
The front and rear surfaces of 3 are formed in an arcuate shape in the height direction when viewed from the side, in accordance with the front and rear surfaces of the bearing portion 53 .

Then, both central shaft bodies 58 of the rotating brush 56 are rotatably fitted and supported by the cylindrical part 62 of the bearing 61, and the flange part 63 of the bearing 61 is vertically movable in the bearing part 53. The rotating brush 56 is fitted and held in the rotating brush chamber 2.
0 facing the suction port 26 so as to be rotatable and movable up and down. 1. Both ends of the rotating brush 56 are inserted into oblong holding holes 64 formed in the partition walls 18 on both sides of the rotating brush chamber 20 so as to be rotatable and vertically movable. In addition, the pulley 59 of the rotating brush 56 located in the belt chamber 24, the pulley 43 of the electric motor 41, etc.
An endless timing belt 66 is stretched between the
.

Next, the reliability of this embodiment will be explained.

When cleaning, the suction port body is connected to the vacuum cleaner body via a hose, an extension pipe, etc. Then electric Ii!
The driving torque of J41 is transmitted to the rotating brush 56 via the belt 66 stretched between the pulley 43 fixed to the rotating shaft 42 and the pulley 59 fixed to the rotating brush jI6, and this rotating rotating brush 5G The dust is scraped up from a carpet, etc. 1, and the scraped up dust is sucked in through the suction port 26 of the main body 11 by the drive of an electric blower inside the vacuum cleaner body, and then into the rotating brush chamber 20,
The air is guided to the dust collection chamber in the vacuum cleaner body through the communication port 25, ventilation chamber 22, connecting pipe 31, extension pipe, and hose.

At this time, depending on the length of the carpet's bristles, etc., the rotating brush 56 is pressed by the carpet's hair.
moves up and down. At the same time, the bearing 61 supporting the rotating brush 56 moves up and down in the bearing portion 53, and the rotating brush 5
6 moves up and down. At that time, the bearing part 53 is
The locus of the bearing 61 and the rotating brush 56 forms an arc centered around the rotating shaft 42 of the electric motor 41, as shown by the short arrow in FIG. The distance between the center of the rotating shaft 42 and the center of the central shaft body 58 of the rotating brush 56, that is, the distance between the axes, is kept constant regardless of the upper position of the rotating brush 56.

In this way, the center distance is 11111. By keeping j2 constant, the following effect can be achieved by 1q.

First, since the tension in the belt 66 is constant, 12
Regardless of the vertical position of the rotating brush 56, a constant driving torque is transmitted from the electric motor 41 to the rotating brush 56.

Therefore, stable bamboo knots can be produced.

Second, since the tension of the belt 66 is similarly constant, the load applied to the electric motor 41 is constant regardless of the vertical position of the rotating brush 56. Therefore, the rotating brush 56 does not tend to stay at a specific vertical position, and moves up and down smoothly.

For example, when the carpet has long bristles, the rotating brush 56 moves upward smoothly, reducing the load on the rotating brush 56 from the carpet.

Third, since the rotating brush 56 does not tend to stop at a position where the tension of the belt 66 is weak, towels and the like are sucked in and wrapped around the rotating brush 56, causing the rotating brush 56 to become locked. In such a case, even if the rotary driving body is the electric motor 41 with a strong torque, the ridges of the gear-shaped pulley 43, 59 and the ridges of the timing bell 1-66 will not cross over. Therefore, wear on the peaks of the timing belt 66 is particularly prevented.

Furthermore, since not only the bearing portion 53 but also the front and rear surfaces of the bearing 61 that slides on the arcuate front and rear surfaces of the bearing portion 53 are arcuate, the sliding performance of the bearing 61 is further improved.

In the above embodiment, the rotary drive body is the electric motor 41, but the rotary drive body may be a turbine rotated by the suction airflow.

〔Effect of the invention〕

According to the present invention, the bearing portion that holds the bearing of the rotating brush so that it can move vertically is shaped like an arc centered around the rotation axis of the rotating drive body that drives the rotating brush with a belt, so that the rotating brush can move vertically. However, the distance between the axes of this rotating brush and the rotating drive body is kept constant, so that a stable driving torque is transmitted to the rotating brush, and the rotating brush also changes depending on the length of the carpet lυ. J:1 moves smoothly, allowing efficient cleaning at all times.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the suction port body of a vacuum cleaner according to the present invention, FIG. 2 is an exploded perspective view of the same, and FIG. 3 is a partially cut away perspective view of the vicinity of the bearing part of the above. FIG. 4 is an enlarged sectional view of the vicinity of the bearing, FIG. 5 is a perspective view of the mutual bearing, and FIG. 6 is a sectional view showing an example of a suction port body of a conventional vacuum cleaner. 11... Suction port body, 12... Lower case, 13... Upper case, 26... Suction port, 31... Connecting pipe, 41...
Electric motor as a rotational drive body, 42...rotating shaft, 53...
Bearing part, 56...Rotating brush, 59...Pulley, 61...
・Bearing, 66...Belt.

Claims (2)

[Claims] (1) A suction port body consisting of a lower case with a suction port opened at the bottom and an upper case with a connecting pipe provided at the rear, and a bearing section provided with the suction port sandwiched within the suction port body, each having vertical movement. a rotary brush that is rotatably supported at both ends by the bearings and is disposed in the suction port body facing the suction port; and a rotary brush that is provided in the suction port body and that faces the suction port. a rotational drive body for driving the rotary drive body, and a rotation transmission belt stretched between a rotation shaft of the rotation drive body and a pulley provided on the rotary brush, and a bearing section that holds a bearing of the rotary brush. A suction port body for a vacuum cleaner, characterized in that the suction port body has an arc shape in a height direction centered on the rotation axis of the rotary drive body. (2) A suction port body for a vacuum cleaner according to claim 1, wherein a bearing that rotatably supports the rotating brush has an arc shape in the height direction to match the bearing portion.