JPH0328A - Suction port body for vacuum cleaner - Google Patents

Abstract

PURPOSE:To obtain a stable travel performance by providing rotary plates which are rotated respectively in opposite directions, and by providing a pair of axially movable driven plates on a support shaft provided thereon with drive traveling wheels so that one of the drive plates is pressed against one of the rotary plates which is rotated in a direction in which one of the driven plates is advanced during advance of a coupling pipe while the other driven plate is pressed against the other rotary plate during backward movement of the coupling pipe. CONSTITUTION:When a motor 56 is driven, output shafts 57, 58 are rotated. The rotation of one of the output shafts 56 is transmitted to a rotary brush 71 so as to sweep out dust from a surface to be cleaned. The rotation of the other shaft 58 is transmitted to a transmission shaft 62 which rotates a bevel gear 64, and accordingly, a pair of bevel gears 36, 36 and a pair of rotary plates 38, 38 are rotated respectively in opposite directions. Upon cleaning, by holding a gripping part of a hose, when a coupling pipe 21 is advanced, a lever 49 is rotated in the direction of the arrow B1 by a boss 51 integrally incorporated with the coupling pipe 21 while a slide lever 47 is moved in the direction of the arrow C1 so that a left friction plate 39 is pressed against the left rotary plate 38, and accordingly, a suction port body 11 is moved forward by drive wheels 66 which is rotated in the advancing direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a suction port body of a vacuum cleaner, and particularly to a self-propelled mechanism of the suction port body.

(Prior Art) In the suction port body of a conventional vacuum cleaner, in order to assist the movement of the suction port body, in accordance with the traveling direction of a rotating brush that is rotationally driven by an electric motor built in the suction port body, A method has been adopted in which the direction of rotation of this rotating brush is reversed. However, in this conventional method, running is greatly affected by the frictional force between the bristles of the rotating brush and the surface to be cleaned, and stable running cannot be obtained depending on the type of surface to be cleaned.

In addition, conventional upright type vacuum cleaners, which have a relatively large vacuum cleaner body with an integrated suction port body and a long handle, are rotated by an electric motor for driving a rotating brush to assist in running. A structure with a driving wheel was also adopted.

In addition, in this conventional vacuum cleaner, a clutch mechanism is provided between the electric motor and the driving wheels, and this clutch mechanism is linked by a wire to a grip portion of the handle that can freely move back and forth, thereby controlling the power transmitted to the driving wheels. is mechanically reversed. However, the driving wheel mechanism employed in such an upright vacuum cleaner is unsuitable for the suction port body as an attachment due to its weight and size.

(Problems to be Solved by the Invention) As mentioned above, with the suction mouth body of a conventional vacuum cleaner, which uses a rotating brush to help the suction mouth body run, stable running performance cannot be obtained, and upright type vacuum cleaners The driving wheel mechanism used in the machine was large and unsuitable for the suction port body.

The present invention aims to solve these problems, and provides stable running performance regardless of the type of surface to be cleaned using a driving wheel mechanism. The purpose is to provide the body.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the suction port body of the vacuum cleaner of the present invention includes a suction port body provided with a suction chamber opening downward on the front side, and a suction port body provided with a suction chamber opening downward. A connecting pipe supported on the rear side so as to be movable a certain distance in a direction parallel to the direction of movement, that is, in the front-back direction and communicating with the suction chamber, an electric motor built in the suction port body, and a connecting pipe below the connecting pipe. a pair of rotary plates located on the suction port body and rotatably supported coaxially with each other and with the left and right directions as rotation axis directions, and rotating in opposite directions in response to the output of the electric motor; A pair of support shafts are rotatably supported coaxially with each of the rotary plates, and each of the support shafts is supported movably in the axial direction and rotates in synchronization with each of the support shafts. a pair of driven plates that are in contact with each other with a frictional force so as to be able to come and go freely; a pair of driving wheels that are respectively provided on each of the support shafts and project downwardly and outwardly from the rear of the suction port body; When the connecting pipe moves forward with respect to the suction port body in response to a reaction force acting between the connecting pipes, one of the driven plates is pressed against one of the rotary plates rotating in the forward direction, and when the connecting pipe moves backward, the other driven plate and a conversion device that converts the force into a force that presses the other rotary plate.

In addition, in the suction mouth body of a vacuum cleaner equipped with a rotating brush that is rotatably supported in the suction chamber of the suction mouth body with the left and right directions as rotation axis directions, a pair of rotating plates are attached to the left and right sides of the suction mouth body. At the same time, the electric motor is disposed at one side in the left and right direction within the suction port main body and at the middle part in the front and rear direction between the rotating brush and the driving wheel. As having a pair of protruding output shafts, a rotation transmission belt is passed between one of the output shafts protruding outward in the left-right direction and one end of the rotary brush in the left-right direction, and The other output shaft, which is located at the center in the direction and is not normally used, may be connected to the rotary plate.

In addition, the drive source that rotationally drives the rotary brush and the drive source that rotationally drives the driving wheels are the same electric motor, and the output shaft of this motor has the left and right direction as the rotation axis direction, and the rotation axis is in the direction orthogonal to the rotation axis direction. A transmission shaft serving as a direction may be connected via a deceleration screw gear, such as a worm and a worm wheel, and both rotary plates may be connected to the transmission shaft via a bevel gear.

Furthermore, the rotating plate and the driven plate are each made into a conical shape,
Further, the driven plate may be a molded product made of synthetic resin or the like, and a plurality of notches may be formed in the driven plate.

(Function) In the suction mouth body of the vacuum cleaner of the present invention, for example, a connection pipe is connected to the vacuum cleaner body via a hose and an extension pipe, and the suction mouth body is held above the surface to be cleaned by holding the grip of the hose or the like. Cleaning is carried out by keeping the robot in contact with the ground and moving mainly in the front and rear directions.

At this time, if force is applied forward or backward to the grip of the hose, a reaction force will be exerted between the connecting pipe connected to this and the suction port body, which is subjected to resistance from the surface to be cleaned. When the converting device converts and the grip part of the hose is pushed forward and the connecting pipe moves forward with respect to the suction port body, one driven plate is pressed against one rotary plate with frictional force,
When the grip portion of the hose or the like is pushed backward and the connecting pipe retreats with respect to the suction port body, the other driven plate is pressed against the other rotary plate.

In response to the output of the electric motor, one rotary plate rotates in the forward direction with the left and right direction as the rotation axis direction, and the other rotary plate rotates in the opposite direction. When the driven plate is pressed, rotation is transmitted from one rotary plate to one driving wheel via this driven plate and one of the supporting shafts that rotates in synchronization with the driven plate, and this driving wheel that rotates in the forward direction causes the suction port body to moves forward and when the other driven plate is pressed by the other rotating plate, the rotation is transmitted from the other rotating plate to the other driving wheel via this driven plate and the other support shaft, and this driving wheel causes the suction The mouth body will move back. Then, dust is sucked in from the suction chamber,
It is led to the vacuum cleaner body via a connecting pipe, extension pipe, hose, etc.

Further, in the suction port body of the vacuum cleaner according to claim 2, the electric motor is located on one side in the left and right direction of the suction port body and in the middle part in the front and back direction between the rotating brush and the driving wheel in the suction chamber. Rotation is transmitted from one of the protruding output shafts to the rotary brush via a belt that extends between the output shaft and one end of the rotary brush in the left and right direction, and the rotary brush is driven to rotate, removing dust from carpets, etc. Scrape it out. At the same time, rotation is transmitted from the output shaft of the electric motor protruding in opposite directions to a pair of rotary plates located at the center in the left-right direction within the suction port main body, and these rotary plates are driven to rotate in mutually opposite directions.

Further, in the suction port body of the vacuum cleaner according to claim 3, the rotating brush and the driving wheel are rotationally driven by the same electric motor, and the rotation is decelerated from the output shaft of the electric motor to the transmission shaft via the screw gear. At the same time, the rotation is transmitted from this transmission shaft to both rotary plates via the bevel gear, and these rotary plates are rotated in mutually opposite directions. Since bevel gears cannot be used at high speeds, they must be decelerated as described above, but since the rotational speed of the driving wheels can be much smaller than the rotational speed of the rotating brushes, there is no problem. Also, for deceleration,
Screw gears with high resistance and high damping are used, but -
There is no problem because the driving wheels require less power to drive than rotating brushes that are large and subject to a large load from surfaces to be cleaned, such as carpets.

Furthermore, in the suction port body of the vacuum cleaner according to claim 4, the rotary plate and the driven plate are each formed into a conical shape, and the suction port body is made thinner in the vertical direction while ensuring a sufficient contact area between them. is possible. In addition, although it is difficult to achieve dimensional accuracy with the driven plate, which is a molded product such as synthetic resin, the notch formed in the driven plate allows the driven plate to deform as appropriate and contact the rotating plate, thereby absorbing dimensional errors. The driven plate contacts the rotating plate with appropriate frictional force.

(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.

11 is a suction port main body whose longitudinal direction is the left-right direction, and this suction port main body 11 is connected to a lower main body case 12 which is vertically connected.
and an upper main body case 13.

Inside the suction port main body 11, a suction chamber 16 is defined on the front side by a partition wall I5 in which the communication port 14 is formed as an opening, and a storage chamber 17 for electric motors etc. is defined on the rear side. There is. Further, a clutch mechanism housing part 18 is formed in the center of the suction port body 11 in the left-right direction and bulges rearward, the inside of which communicates with the electric motor housing chamber 17. In addition, facing the suction chamber 16, the suction port main body 1
A suction port 19 is formed in the lower surface of the device 1 .

Reference numeral 21 denotes a connecting pipe, and this connecting pipe 21 is located above the clutch mechanism storage portion 18 and is supported at the rear of the suction port body 11 so as to be able to tilt up and down by a predetermined angle and to move forward and backward by a certain distance. It consists of a rotary tube 22 and a bent joint tube 23 which is fitted and connected to the rear portion of the rotary tube 22 so as to be rotatable in the circumferential direction. The joint pipe 23 is removably fitted into an extension pipe connected to a vacuum cleaner main body (not shown) via a hose. In addition, the rotation tube 22
The supporting shaft portions 24 coaxially protruding from both left and right side surfaces of the front portion thereof are rotatable and slidable in the front and rear directions into a pair of oval holes 25 formed in the suction port body 11, respectively. It is inserted through and supported. Furthermore, the front opening of the rotation tube 22 located in the suction port body ll and the communication port 1
4 are connected to each other via an extendable and bendable connecting pipe 26, and the inside of the connecting pipe 21 and the suction chamber 16 are communicated through this connecting pipe 26.

Further, from the inside to the outside of the clutch mechanism storage portion 18 of the suction port main body 11, a pair of support shafts 31.31 are coaxially arranged with bearings 32.
32 so as to be rotatable in forward and reverse directions. These support shafts 31 and 31 rotatably pass through the lower sides of both left and right sides of the substantially U-shaped support body 33 located in the clutch mechanism storage portion 18, but the rotation tube 22
Each support shaft 2 of the rotary tube 22 is inserted into a through hole 34 formed on the upper side of both sides of the support 33 through which the front part of the rotary tube 22 is inserted.
4 are rotatably penetrated through each of them. In this way, a support device for the connecting pipe 21 is constructed.

Also, at each end of each of the support shafts 31, 31 located within the clutch mechanism storage portion 18, a bevel gear 35.
36 are supported rotatably and fixedly in the axial direction by bearings 37 and 37 with their tooth surfaces facing each other. and,
Disk-shaped rotary plates 38, 38 are fixed to the surfaces opposite to the tooth surfaces of each of the bevel gears 36, 36, respectively. Furthermore, each support shaft 31 is located within the clutch mechanism storage portion 18.
．． 31 supports friction plates 39 and 39 as driven plates which are brought into contact with each of the rotary plates 38 and 38 so as to be able to move toward and away from the rotary plates 38 and 38 with a frictional force. These friction plates 39.3
9 has notches 40.40 extending in the axial direction of the support shafts 31.31, and bosses provided in these notches 40.40 protrude from the outer peripheral surface of each support shaft 31.31. 41.41
are engaged so as to be slidable in the axial direction, so that each friction plate 3939 is prevented from rotating with respect to each support shaft 31, 31, and is also slightly movable in the axial direction. .

In this way, two pairs of rotating plates 38° 38 coaxially facing each other
and the friction plates 39 and 39 constitute two friction clutch mechanisms.

Further, in the clutch mechanism housing portion 18, one friction plate 39 is provided to accommodate one friction plate 39 when the connecting pipe 21 moves forward with respect to the suction port main body 11 in response to a reaction force acting between the suction port main body 11 and the connecting pipe 21. A conversion device 46 is provided that presses one rotary plate 38 and converts the force into a force that presses the other friction plate 39 against the other rotary plate 38 when the rotary plate 38 moves backward.

This conversion device 46 has a sliding lever 47 in the shape of a hollow, and this sliding lever 47 is located on both left and right sides of the support body 33 and on both left and right sides between the friction plates 39 and 39. Each of the support shafts 31, 31 is rotatably passed through the portion, and is supported so as to be slidable in the left-right direction. The left and right sides of the sliding lever 47 are fitted with washers 48.
．． The respective friction plates 39, 39 are connected to each rotary plate 38 via 48.
．． 38.

In addition, in front of the sliding lever 47, a pin 5 is provided with a lever lever 49 having an L-shape, which is rotatably passed through the corner of the lever lever 49.
0, it is rotatably supported with the vertical direction as the rotation axis direction. At one end of the lever lever 49, a boss 51 is integrally provided vertically at the front end of the lower surface of the rotary tube 22.
are rotatably connected.

Further, a boss 53 integrally projecting from the sliding lever 47 is engaged with a notch 52 formed at the other end of the lever 49 so as to be rotatable and slidable. In addition,
The distance from the pin 51 of the boss 53 of the sliding lever 47 is smaller than that of the boss 53 of the rotating tube 22.

Further, an electric motor 54 is disposed on one side in the left-right direction (hereinafter, this side will be referred to as the right side) in the motor storage chamber 17 of the suction port main body 11. This electric motor 5a has a pair of output shafts 5 that protrude to both sides in the left-right direction and rotate integrally.
7.58, and a pulley 59 is fixed to one of the output shafts 57 located near the outer shell of the suction port body 11. Further, a worm 60, which is a screw gear, is coaxially fixed to the other output shaft 58 located at the center in the left-right direction within the suction port body 11. Further, a transmission shaft 62 is rotatably supported by a bearing 61 in the electric motor storage chamber 17 with the front-rear direction as the rotation axis direction, and is a screw gear coaxially fixed to the front end of the transmission shaft 62. A worm wheel 63 is meshed with the worm 60 whose axis of rotation is in the left-right direction. Then, the transmission shaft 6
A bevel gear 64 coaxially fixed to the rear end of the bevel gear 36, 36 is meshed with said bevel gear 36.36.

The suction port body 11 in each of the support shafts 31, 31
A driving wheel 66, 56 is coaxially and fixedly attached to each end projecting outwardly from the drive wheel.

Note that these driving wheels 66, 66 protrude downward from the lower surface of the suction port main body II. In addition, the suction port 19
The front wheel 67 is located on the lower surface of the suction port body 11 at the rear of the
is pivoted with the left-right direction as the rotation axis direction.

Further, within the suction chamber 16 of the suction port body 11, a rotary brush 71 is rotatably supported by a bearing 72 with the left-right direction as the rotation axis direction. And this rotating brush 7
An endless rotation transmission belt 74 is stretched between a pulley 73 fixed to the right end of the electric motor 1 and a pulley 59 of the electric motor 56.

Next, the operation of the above embodiment will be explained.

When cleaning, for example, the joint pipe 23 is connected to the main body of the vacuum cleaner via a hose and an extension pipe. When the electric motor 56 is driven by operating a switch located on the grip of the hose, its output shafts 57 and 58 rotate.
4 and the pulley 73, the rotating brush 71 is driven to rotate, and dust is scraped off from the surface to be cleaned, such as a carpet. Further, the rotation of the other output shaft 58 is transmitted to the transmission shaft 62 via the worm 60 and the worm wheel 63 while being slowed down, and the bevel gear 64 is rotationally driven together with the transmission shaft 62.

As the bevel gear 64 rotates, the pair of bevel gears 36 and 36 and the rotating plates 38 and 38 are rotated in opposite directions.

When cleaning, hold the grip of the hose, position the suction port main body 11 in front of your body, and place the driving wheels 66, 66 and the front wheel 67 at the bottom of the suction port main body 11 on the floor, on a folded floor, or on a covered surface such as a carpet. The suction port main body 11 is moved mainly in the front-rear direction while being grounded on the surface to be cleaned.

At this time, when force is applied forward or backward to the grip part of the hose, the force is directly transmitted from the grip part through the extension pipe to the connecting pipe 21 and the suction port main body 11 to which resistance is applied from the surface to be cleaned.
A reaction force acts between In particular, when the grip part of the hose is pushed forward and the connecting pipe 21 moves forward with respect to the suction port body 11 as shown by arrow A1 in FIG. , the lever lever 49 of the conversion device 46 rotates in the direction indicated by arrow B in FIG.
This lever lever 49 moves the sliding lever 47 in the direction shown by arrow C7 in FIG.
7, the left friction plate 39 is aligned with the arrow CI with respect to the support shaft 31.
It moves in the direction shown by and is pressed against the left rotary plate 38. As a result, from the left rotating plate 38 to the left friction plate 39
The rotation is transmitted to the left support shaft 31 which rotates synchronously with the support shaft 31, and together with this support shaft 31, the left drive wheel 66 is rotationally driven in the direction shown by arrow D1 in FIG.

The suction port main body 11 moves forward by this driving wheel 66 rotating in the forward direction.

In this state, the friction plate 39 on the right side is not pressed against the rotating plate 38 on the right side, so this rotating plate 38 idles around the right support shaft 31, and the rotation plate 38 rotates idly with respect to the right support shaft 31.
1 and the right driving wheel 66 can rotate freely. Therefore, this driving wheel 66 rotates in the direction shown by the arrow D1 as the suction port body II moves forward.

In response, the grip of the hose is pulled backwards and the second
As shown by arrow A2 in the figure, when the connecting pipe 21 retreats with respect to the suction port main body 11, the lever lever 4
9 rotates in the direction shown by arrow B2 in FIG. 5, the sliding lever 47 moves in the direction shown by arrow C2 in FIG. It moves in the direction shown and is pressed against the rotating plate 38 on the right side. As a result, rotation is transmitted from the right rotating plate 38 to the right support 1i [131] via the right friction plate 39, and the right driving wheel 66 rotates together with this support shaft 31 in the direction shown by arrow D2 in FIG. Driven. The suction port body 11 moves backward by the driving wheels 66. At this time, the left friction plate 39
is not pressed against the left rotary plate 38, the left driving wheel 66, to which no power is transmitted, can freely rotate, and this driving wheel 66 follows the retreat of the suction port body 11, as indicated by arrow D2. Rotate in the direction.

Furthermore, when no force is applied to the grip of the hose, both friction plates 39 and 39 are not pressed against the rotary plate 38, so both driving wheels 66 and 66 can be brought to a halt. , the suction port body 11 can be stopped.

Then, the dust scraped out by the rotating brush 71 is sucked together with air through the suction port 19, and is led to the vacuum cleaner body via the suction chamber 16, the connecting pipe 26, the connecting pipe 21, the extension pipe, and the hose. The dust is trapped inside the dust collection chamber of the vacuum cleaner body.

By the way, the distance from the pin 50 which is the fulcrum of the lever lever 49 is greater than the distance from the boss 51 which is the force point of the connecting pipe 21 to the lever lever 50.
Since the boss 53, which is the point of action of 7, is smaller, the friction plate 39 is smaller than the longitudinal movement distance of the connecting pipe 21.
．． The moving distance of No. 39 in the left-right direction is smaller. Therefore, the reaction force acting between the connecting pipe 21 and the suction port body 11 is bent vertically by the lever lever 47 and the friction plate 39.
39, it will be enlarged and transmitted.

As the force is transmitted by the lever lever 47, a force proportional to the reaction force acting between the connecting pipe 21 and the suction port main body 11 is transmitted to the friction plates 39 and 39, so that the larger the reaction force is, the more the friction plate 39.39 and rotating plate 38.
The frictional force of the 38 opening increases, and the rotational force applied to the driving wheels 66°66 also increases.

The reaction force acting between the connecting pipe 21 and the suction port body 11 becomes large when the user tries to move the suction port body 11 faster by pushing the grip harder or bowing, or This is a case where the resistance force applied to the suction port main body 11 from the surface to be cleaned is large. This drag varies depending on the type of surface to be cleaned, but the larger the drag, the greater the force required for the suction port body 11 to travel. And the driving wheel 66, f
The greater the rotational force applied to +6, the less the slippage between the friction plates 39, 39 and the rotating plates 38, 38 caused by said drag force.

Therefore, not only is the direction in which the user intends to run the suction port body 11 automatically reversed by sensing the direction in which the user intends to run the suction port body 11, but the suction port While the main body 11 runs, stable running performance is obtained regardless of the type of surface to be cleaned. Moreover,
As described above, the reaction force acting between the connecting pipe 21 and the suction port body 11 is magnified and transmitted to the friction plates 39, 39, so that the automatic adjustment of the rotational force of the driving wheels 66, 66 described above is more effective. be effective.

Furthermore, since the driving wheels 66, 56 and the rotating brush 71 share a common driving source, when a foreign object such as a sock gets caught in the rotating brush 71 and the rotating brush 71 and the electric motor 56 stop, the driving wheels 66, 66 also Since the system stops, it is easy for the user to recognize that an abnormality has occurred.

Further, according to the above configuration, in particular, rather than mechanically reversing the rotational driving direction of the driving wheels themselves, power transmission to the pair of driving wheels 1i6.65 that are rotationally driven in mutually opposite directions is selectively input. By turning off the switch, the suction port main body 11 can be moved in the direction that the user wants to move, thereby simplifying the configuration of the clutch mechanism, etc., and making the driving wheel mechanism compact. can be converted into

Furthermore, a rotating brush 71, one electric motor 56 which is a drive source for the rotating brush 7I and the driving wheels 56, 56, a clutch mechanism for transmitting power to the driving wheels 66, 66, etc. are installed in the suction port body 11. Since they are arranged in the positional relationship shown in the figure without waste, space can be saved and the suction port main body 11 can be made more compact.

By the way, in order to rotate the pair of rotary plates 38.38 in opposite directions, the bevel gear 36.3 is used as in the above embodiment.
If 6.64 is used, the structure can be made simple and compact. However, since bevel gears cannot be used at high speeds for boat fishing, it is necessary to reduce the speed when transmitting power to the bevel gears 36, 36, and 64. In the above embodiment, the rotating brush 71 and the driving wheels 65, 65 are driven by the same electric motor 56, but the driving wheels 66, 66
The rotational speed of the rotating brush 71 may be much lower than that of the rotating brush 71, so there is no problem even if the speed is reduced.

Further, in order to perform this deceleration, the worm 60 and the worm wheel 63, which are screw gears, are used as in the above embodiment.
By using this, it is easy to set the deceleration rate, and the structure can be made simple and compact. However, when power is transmitted using screw gears for boat fishing, the resistance is large and the attenuation is also large. In the above embodiment, the rotating brush 71 and the driving wheel H
, 66 are driven by the same electric motor 56, but -
Since the driving wheels 66, 66 require less power to drive than the rotating brush 71, which is large for boat fishing and receives a large load from surfaces to be cleaned such as carpets, there is no problem even if the transmission efficiency is low. Specifically, the load on the rotating brush 71 is approximately 3 kg, and the power required to drive it is approximately 40 kg.
~50W, and the power required to drive the driving wheels 56,66 is 10W or less.

Thus, according to the above configuration using the bevel gears 36, 36, 64 and screw gears, the structure can be simplified and made more compact without impairing the reliability of the mechanical mechanism.

FIG. 6 shows another embodiment of the present invention. In this embodiment, a rotary plate 38.38 and a friction plate 39.39 each have a rotation axis in the left-right direction and a friction plate 39.39 whose central axis is the rotation axis. It has a cylindrical shape.

According to this configuration, the rotating plate 38.38 and the friction plate 39°3
It is possible to reduce the height h of the suction port body 11 shown in FIG.

Further, FIG. 7 shows still another embodiment of the present invention, and this embodiment is different from the friction plate 39 in the other embodiments described above.
．． In addition to making 39 into a molded product of heat-resistant synthetic resin,
Notches 7G extending in the direction of the generatrix are formed at a plurality of locations on the circumferential surface of the friction plates 39,39.

Although molded products such as synthetic resin can be made at low cost, it is difficult to achieve dimensional accuracy;
The friction plate 39.39 contacts the rotary plate 38.38 while being deformed appropriately, so even if there is a dimensional error, the friction plate 39.39
9 with appropriate frictional force, and there is no shortage of frictional force. In this way, the notch 76 allows the friction plate 3 to
Can accommodate dimensional errors of 9.39.

〔Effect of the invention〕

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

In the suction port body of a vacuum cleaner according to claim 1, a pair of rotary plates rotated in opposite directions by an electric motor, and a pair of support shafts each provided with driving wheels for running are movable in the wheel direction and are prevented from rotating. When the connecting pipe moves forward, one of the driven plates moves in the forward direction due to the reaction force acting between the pair of driven plates supported by the main body, the suction port body, and the connecting pipe supported by the suction port body so as to be movable back and forth. It is equipped with a conversion device that converts force into force that presses one rotary plate that rotates toward the other side and presses the other driven plate against the other rotary plate when reversing, so the suction port body moves in the direction the user wants to run. The configuration for running is simple,
The driving wheel mechanism can be made compact, and therefore the suction port body can also be configured compactly, and rotational force corresponding to the force applied by the user to the connecting pipe or the force applied to the suction port body from the surface to be cleaned can be applied to the driving wheels. As a result, the suction port main body can be moved at a speed desired by the user, and stable running performance can be obtained regardless of the type of surface to be cleaned.

In addition, in the suction port body of the vacuum cleaner according to claim 2, the rotary plate is disposed at the center in the left and right direction within the suction port body, and the electric motor is located at one side in the left and right direction within the suction port body, and the rotating brush is arranged at one side in the left and right direction within the suction port body. Rotation is transmitted to one of the pair of output shafts that protrudes outward in the left-right direction of the pair of output shafts that are arranged in the longitudinally intermediate part between the driving wheels and protrudes to both sides in the left-right direction of the electric motor and one end in the left-right direction of the rotating brush. Since the other output shaft is connected to the rotating plate, each of the above components can be placed without wasting space inside the suction port body, making the suction port body more compact. Can be done.

Further, in the suction port body of the vacuum cleaner according to claim 3, the drive source of the rotating brush and the drive source of the driving wheels are the same electric motor, and the transmission shaft is connected to the output shaft of this electric motor via a screw gear for deceleration. However, since both rotary plates are connected to the transmission shaft via bevel gears, the driving wheels only need to rotate at a slower speed than the rotary brushes, and the power required for driving is small. The structure can be simplified and made even more compact without compromising reliability.

Furthermore, in the suction port body of the vacuum cleaner according to claim 4, since the rotating plate and the driven plate are each made into a conical shape, the height of the suction port body can be lowered, and the driven plate is made of a molded product. At the same time, multiple notches are formed in this driven plate, so even though the driven plate is made into a molded product that is inexpensive but difficult to achieve dimensional accuracy, the notches can absorb dimensional errors. , it is possible to prevent insufficient frictional force between the driven plate and the rotating plate.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing an embodiment of the suction port body of a vacuum cleaner according to the present invention, excluding the upper case, FIG. FIG. 4 is a perspective view of the support part of the connecting pipe, FIG. 5 is a perspective view of the converting device part, and FIG. 6 is a plan view showing a cross section of a part of the clutch mechanism part showing another embodiment of the present invention. 7 are perspective views of a driven plate showing still another embodiment of the present invention. 11. Suction port body, 16. Suction chamber, 21. Connecting pipe, 31.31. Support shaft, 36.36. Bevel gear, 38°38. Rotating plate, 39.39. Driven plate. Friction plate as, 46... Conversion device, 56... Electric motor, 57.58...
Output shaft, 60...Worm which is a screw gear, 62...Transmission shaft, 63...Worm wheel which is a screw gear, 64
...Bevel gear, 66, 66...Driving wheel, 71...Rotating brush, 74...Rotation transmission belt, 76...Notch.

Claims (4)

[Claims] (1) A suction port body with a suction chamber opening downwardly provided on the front side; a connecting pipe supported on the rear side of the suction port body so as to be movable a certain distance in the front-back direction and communicated with the suction chamber; and the suction port body. an electric motor built into the mouth body; and an electric motor located below the connecting pipe and rotatably supported by the suction mouth body coaxially with each other and with the left and right directions as the rotational axis directions, and receiving the output of the electric motor in directions opposite to each other. a pair of rotary plates that rotate to each other; a pair of support shafts rotatably supported coaxially with each of the rotary plates on the suction port body; a pair of driven plates that respectively rotate in synchronization with each of the support shafts and are in contact with each of the rotary plates in a movable manner and with frictional force; a pair of driving wheels protruding in the direction, one of which rotates one of the driven plates in the forward direction when the connecting pipe moves forward with respect to the suction port main body under the reaction force acting between the suction port main body and the connecting pipe; A suction port body for a vacuum cleaner, characterized in that the suction port body for a vacuum cleaner is equipped with a conversion device that converts the force that presses the other driven plate into a force that presses the other driven plate against the other rotating plate when the rotating plate moves backward. (2) A rotating brush is rotatably supported in the suction chamber of the suction port body with the left-right direction as the rotation axis direction, a pair of rotary plates are disposed in the center of the suction port body in the left-right direction, and an electric motor is provided. is disposed at one side in the left-right direction within the suction port main body and at an intermediate portion in the front-rear direction between the rotating brush and the driving wheel, and the electric motor has a pair of output shafts that respectively protrude to both sides in the left-right direction; A rotation transmission belt is passed between one of the output shafts protruding outward in the direction and one end of the rotary brush in the left-right direction, and the other output shaft located at the center in the left-right direction within the suction port main body is connected to the rotation transmission belt. The suction port body for a vacuum cleaner according to claim 1, wherein the suction port body is connected to the rotary plate. (3) A rotary brush is rotatably supported in the suction chamber of the suction port body with the left and right direction being the rotation axis direction, and the drive source for rotationally driving the rotary brush and the drive source for rotationally driving the driving wheels are driven by the same electric motor. A transmission shaft whose rotational axis direction is orthogonal to the output shaft of this electric motor is connected to the output shaft whose rotational axis direction is in the left-right direction of the electric motor via a deceleration screw gear, and the transmission shaft is connected to the output shaft whose rotational axis direction is in the left-right direction. 3. The suction port body for a vacuum cleaner according to claim 1, wherein the plates are connected via a bevel gear. (4) The rotating plate and the driven plate each have a conical shape, the driven plate is a molded product, and a plurality of notches are formed in the driven plate. Vacuum cleaner suction body.