JPH0910141A - Vacuum cleaner suction body - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a suction port body of an electric vacuum cleaner in which a connection tube provided in a main body case is prevented from being improperly rotated. [Structure] A bearing part 17 is formed on a side wall 16 of a suction port 15 (suction air passage) communicating with an opening formed on a lower surface of a main body case 1 composed of a lower case 10 and an upper case 20, and is formed on a tip end part. The rotating shaft 56 is
In the suction port body A of the electric vacuum cleaner which is rotatably supported by the main body case 10 and provided with the connection tube 50 rotatably provided in the main body case 10, the notch portion 17b is formed in the bearing portion 17 toward the surface to be cleaned. The outer peripheral surface of the rotating shaft 56 and the bearing surface 17 of the bearing portion 17.
It is possible to prevent dust that has entered between a and d from dropping from the cutout portion 17 to adhere to the outer peripheral surface of the rotating shaft 56 and the bearing surface 17a of the bearing portion 17 to prevent the connecting pipe 50 from rotating. The suction inlet of the vacuum cleaner designed to prevent it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port body of an electric vacuum cleaner, and more particularly to a suction port body for maintaining a good rotation of a connecting pipe connected to an extension pipe or the like.

[0002]

2. Description of the Related Art A suction port body used in a conventional vacuum cleaner is generally composed of a main body case and a rotatable connecting pipe provided in the main body case. The cleaning is done by connecting to the extension pipe connected to the suction hose connected to. In the mounting structure for rotatably mounting the connection pipe to the main body case, the rotary shafts provided at both ends of the connection pipe are rotatably supported by the bearings formed in the main body case. .

If it is used for a long period of time, dust will enter between the bearing surface of the bearing and the outer peripheral surface of the rotary shaft,
The dust that has entered will adhere to the bearing surface or the outer peripheral surface, and if fine dust or the like is mixed in the dust, the bearing surface or the rotating shaft will wear and the connecting pipe will not rotate smoothly. As a result, during the operation of moving the suction port body during cleaning, for example, the suction port body floats above the floor surface, and the lower surface of the suction port body cannot maintain a predetermined gap with respect to the floor surface, which prevents good dust absorption. There is.

A rotary brush having bristles around it is provided in the main body case, and the rotary brush is rotatably driven by an electric motor. This electric motor is housed in the electric motor storage chamber provided in the main body case.However, providing a cooling air passage for cooling the electric motor in the main body case means that the space in the main body case is small. There was a problem in that there was a design constraint when setting the air passage.

[0005]

As described above, in the conventional suction port body of the electric vacuum cleaner, the bearing provided on the main body case that pivotally supports the rotary shaft of the connecting pipe and the fitting shaft. Dust that has entered between and adheres to the outer peripheral surface of the mating shaft and the bearing surface of the bearing, hinders the smooth rotation of the connecting pipe, and the lower surface of the suction port body during the movement operation of the suction port body during cleaning. There is a problem in that the gap between the cleaning surface and the surface to be cleaned is not maintained at a predetermined gap and good dust cannot be absorbed. In addition, there is a problem in that there is a design restriction in providing an air passage for cooling the electric motor.

[0006]

The invention according to claim 1 solves the problem that smooth rotation of the conventional connecting pipe is hindered, and communicates with an opening formed on the surface to be cleaned. A main body case having a suction air passage and a vent hole formed in the outer wall, bearing portions formed on both side walls of the suction air passage orthogonal to the longitudinal direction of the main body case, and a surface to be cleaned on both side walls. A notch formed in the lower bearing surface of the bearing portion and communicating with the suction air passage and the ventilation hole, and a connection portion provided on one end side and the suction air passage on the other end side. A suction port of an electric vacuum cleaner, which has a suction pipe opening at the same time, and a connecting pipe having a suction portion formed on both sides of the suction opening and having a rotation shaft rotatably supported by the bearing portion. The invention according to claim 2 is In addition to solving the problem that the smooth rotation of the conventional connecting pipe is obstructed, it also eliminates the design constraint that constitutes the air passage for cooling the electric motor, and is formed on the surface to be cleaned side. A main body case having a suction air passage communicating with the opening and a vent hole formed in an outer wall, a rotary cleaning member rotatably provided in the main body case, and the suction air passage orthogonal to a longitudinal direction of the main body case. Formed on both side walls of the bearing, and a notch formed on the both side walls in the direction of the surface to be cleaned and opened on the lower bearing surface of the bearing portion for communicating the suction air passage and the vent hole. And a suction opening opening to the suction air passage on the other end, and a rotary shaft rotatably supported by the bearing on both sides of the suction opening. Installed in the main body case and the connecting pipe with a suction part. Is at one end that a suction port of the vacuum cleaner and a electric member accommodation chamber for accommodating the electrical member in the interior with communicating respective other end to the vent hole in the notch.

[0007]

With the above-mentioned structure, the invention according to claim 1 is arranged between the outer peripheral surface of the fitting shaft of the connecting pipe and the bearing surface of the bearing portion which rotatably supports the fitting shaft. Since the dust that has entered falls down from the notch opening in the bearing surface, dust that has entered between the outer peripheral surface of the fitting shaft and the bearing surface of the bearing portion may adhere to these outer peripheral surface and bearing surface. Moreover, the rotation of the connecting pipe is not hindered by the adhesion of the dust.

According to the invention of claim 2, in addition to the function of claim 1, the cutout portion is used as a ventilation hole to facilitate the construction of the air passage and to reliably cool the electric component member.

[0009]

Embodiments of the present invention will now be described with reference to FIGS.
It will be described based on. 1 is a perspective view showing the whole of the suction port body, FIG. 2 is a view of the suction port body seen from the upper surface, and FIG. 3 is a view of the suction port body seen from the lower side, that is, the floor surface side. FIG. 4 is a view of a part of the upper case of the suction port body cut out and seen from the upper surface, and FIG. 5 shows a rotation shaft of the suction port body connection pipe and a bearing portion provided in the main body case. FIG. 6 is an exploded perspective view showing the relationship, and FIG. 6 is a partial sectional view taken along line XX in FIG.

As shown in the drawing, the suction port body A is a main body case 1, and a rotary cleaning body 30 disposed in the main body case 1.
a, 30b This is composed of an electric motor 40 that rotationally drives the rotary cleaning bodies 30a and 30b, and a connecting pipe 50 provided on the rear side of the main body case 1.

The body case 1 is a lower case 1
0 and an upper case 20. The lower case 10 and the upper case 20 are connected to each other via the bumper 2 as shown in FIG.
As shown in FIG. 3, they are integrally connected by three screws 3. Then, as shown in FIG. 3, a pair of openings 11a and 11b formed along the longitudinal direction are provided on the lower surface of the lower case 10, that is, the surface on the floor side which is the surface to be cleaned,
The rotary cleaning bodies 30a, 3b are provided in the openings 11a, 11b.
0b is arranged so that its outer peripheral portion is slightly exposed. A bearing portion 12 is formed on the side wall of the lower case 10 on the longitudinal direction side so that the upper case 20 side is opened corresponding to the openings 11a and 11b.
a, 13a and 12b, 13b are provided. Further, the lower case 10 is provided with a center traveling wheel mounting portion 14 formed by being recessed inward on the lower surface of the central portion, and a center traveling wheel 81 is mounted on the center traveling wheel mounting portion 14. In addition, as shown in FIG.
In the figure of the center traveling wheel mounting portion 14, a suction port 15 as a suction air passage is formed in the upper part, and the suction port 15 communicates with the openings 11a and 11b. The upper portion of the suction port 15 is covered with the middle case 5.

Then, as shown in FIG.
A bearing portion 17 is formed on each of the side walls 16 on both sides of the lower case 10, that is, the main body case 1 facing each other in the longitudinal direction. The bearing portion 17 is formed in a semicircular shape having an opening at the top, and its bearing surface 1
The notch 1 formed in 7a is formed in the lower surface, that is, in the direction of the floor surface which is the surface to be cleaned, while opening to the bearing surface 17a.
7b is provided. Further, there is provided a positioning wall 16a which is located outside the both side walls 16 and is separated by a predetermined distance and has a notch 16b formed therein. This positioning wall 1
6a contacts both ends of a rotary shaft 56 of the connecting pipe 50, which will be described later, and regulates the movement of the rotary shaft 56 in the axial direction. The positioning wall 16a may be omitted by positioning the rotating shaft 56 on the surfaces of the side wall 16 facing each other.

The side walls 16 and the positioning wall 16 are also provided.
4 and 5 (as viewed from the front side of the suction port body A), the electric motor storage chamber 41 as an electric component storage chamber for storing the electric motor 40 as an electric component is provided on the right side in FIG. Further, on the left side, a circuit device accommodating chamber as an electric component accommodating chamber for accommodating a circuit device 60 as an electric component member including a wiring substrate 60a, an LED lamp mounted on the wiring substrate 60a, a resistor and other circuit components 60b A chamber 61 is provided. The electric motor storage chamber 41 and the circuit device storage chamber 61 are aligned with the positioning wall 16a.
It is adapted to communicate with the suction port 15 through the notch 16b and the notch 17b of the bearing portion 17.

Next, the rotary cleaning members 30a and 30b are composed of cylindrical members 31a and 31b and the cylindrical members 31a and 3b.
1b is composed of brush bodies 32a, 32b made of brush bristles or a soft thin plate member on the outer periphery of 1b, and bearing portions 12a, 13a provided on the lower case 10 are provided at both ends of the rotary cleaning bodies 30a, 30b. 1
Bearings 33a and 3 fitted and attached to 2b and 13b
4a and 33b, 34b are attached. Further, the bearing 34 is provided on each of the rotary cleaning members 30a and 30b.
Pulley 35 is attached to the side where a and 34b are attached.
a and 35b are provided. And the bearing 33
a, 34a and 33b, 34b to the lower case 10
Bearings 12a, 13a and 12b, 13 provided on the
The rotary cleaning bodies 30a and 30b are attached to the lower case 10 by being fitted in b.

Further, as shown in the figure, the upper case 20 is formed with a notch portion 21 in which a connecting pipe 50 is arranged so as to be vertically rotatable in the rear center portion. In addition, ventilation holes 22a and 22b are provided on both side walls of the upper case 20, and the ventilation hole 22a has a cutout 16b and a cutout portion 17b.
A circuit device that communicates with the electric motor storage chamber 41 that communicates with the suction port 15 through b, and that the ventilation hole 22b also communicates with the suction port 15 through the cutouts 16b and 17b. It communicates with the storage chamber 61. Therefore, during cleaning or the like, the connecting pipe 50 is inserted through the suction port 15 of the main body case 10.
When the air is sucked into the air, the outside air sucked from the ventilation hole 22a is the outside air of the motor storage chamber 41 and the notch 16
The electric current flows into the suction port 15 through b and the cutout portion 17b, and the electric motor 40 is cooled by this outside air.
Further, the outside air sucked from the ventilation hole 22b flows into the suction port 15 through the circuit device accommodating chamber 61, the notch 16b and the notch portion 17b, and the outside air sucks the circuit component 60.
b is cooled. Further, although not shown in the upper case 20, the rotary cleaning bodies 30a, 30 fitted to the bearing portions 12a, 13a and 12b, 13b of the lower case 10, respectively.
A restriction piece for restricting the movement of the bearings 33a, 34a and 33b, 34b of b is provided. Also, the upper case 2
Reference numeral 0 indicates each bearing portion 1 provided on the lower case 10.
A semicircular bearing portion (not shown) corresponding to No. 7 is formed.

An output shaft 42 of the electric motor 40 housed in the electric motor housing chamber 41 is connected to a gear device 43, and a drive pulley 44a is provided at the tip of the gear device 43.
A pair of output shafts 44 to which are attached are provided side by side in the vertical direction (only the upper drive pulley is shown in FIG. 4), and the drive belt 36a is provided on the upper drive pulley 44a and the pulley 35a of the rotary cleaning body 30a. Is hung. In addition,
Similarly, a drive belt 36b is wound around the lower drive pulley (not shown) and the pulley 35b of the rotary cleaning body 30b. The rotation directions of the pair of drive pulleys 44a are set so as to rotate the rotary cleaning body 30a in the arrow a direction in FIG. 6 and rotate the rotary cleaning body 30b in the arrow b direction.

Next, the connecting pipe 50 will be described. This connecting pipe 50 is a rotary pipe 51 having a connecting portion 51a.
And a rotary tube 52 into which the rotary tube 51 is fitted so as to be rotatable in the circumferential direction. The rotary tube 51 is provided with a connection terminal housing portion 53a closed by a lid 53, and a connection terminal 54 attached to the connection terminal housing portion 53a is provided so as to project toward the connection portion 51a. ing. When the connecting portion 51a of the rotary tube 51 is fitted and connected to an extension tube connected to a suction hose connected to an electric vacuum cleaner body (not shown), the connection terminal 54 is fitted to a female terminal provided on the extension tube. It is supposed to meet.

The tip end of the rotating tube 52 is a suction part 52a, and a suction opening 55 is formed in the suction port 15 of the main body case 1 at the suction part 52a.
A rotary shaft 56 formed of an annular wall is formed on both sides. The rotating shaft 56 is rotatably supported by a bearing portion 17 formed on the lower case 10 and a bearing portion (not shown) formed on the upper case 20.
When the rotating shaft 56 rotates, the rotating shaft 56 rotates while slidingly contacting the bearing surface 17a of the bearing portion 17. Therefore, dust that has entered between the bearing portion 17 and the rotating shaft 56 is rotated by the rotating shaft. When falling, the dust drops downward from the notch 17b, and the dust that falls is sucked into the vacuum cleaner by the suction air, and the bearing surface 1
7a, dust adhering to the surface of the rotary shaft 56 is the vent hole 2
2A and 22b are sucked by the outside air flowing into the suction port 15 and are prevented from adhering.

A lead wire 57, which is connected to the connection terminal 54 attached to the connection terminal housing portion as shown by a two-dot chain line in FIG. 5, is led out inside the rotary shaft 56. A connector 58 is connected to the lead wire 57, and the connector 58 is connected to a connector (not shown) provided on the wiring board 60a.

Further, as shown in FIG.
On the upper surface of the suction port 1, there is provided a lead wire holding means 5a composed of two sandwiching protrusions provided with a small gap therebetween.
5 are provided substantially at the upper portions of both side walls 16 of the circuit 5, and the lead wire holding means 5a serves to provide the circuit device 6
The lead wire 62 connecting 0 and the electric motor 40 is sandwiched and held. The lower case 10
Front traveling wheels 82, 82 on both front sides of the rear traveling wheel 8 and rear traveling wheels 8 located near both sides of the connecting pipe 50 on the rear side.
3 and 83 are provided, respectively. As shown in FIG. 3, the lower case 10 is provided with a sensor wheel 84 protruding from the lower surface, and the sensor wheel 84 is a lower surface of the suction port body A that is operated during cleaning. The gap between the lower surface of the lower case 10 and the surface to be cleaned is detected, and the electric blower is controlled based on the detection result to adjust the intake air volume of the cleaner body via the circuit device 60. .

In the figure, 86 is a name plate and 87 is a seal lip.

Next, the assembling of the suction port body A constructed as described above will be explained.

First, the center traveling wheel 81,
The front traveling wheel 82, the rear traveling wheel 83, the electric motor 40, and the circuit device 60 are mounted by a mounting tool (not shown). Next, the rotary cleaning bodies 30a and 30b are attached to the bearings 33a and 34a and 33b and 34b, respectively.
The bearings 12a, 13a and 12b, 13b of No. 0 are fitted and arranged. In this arrangement, the drive belt 36a is provided on the gear device 43, the drive pulley 44a and the pulley 35a of the rotary cleaning body 30a, and the drive belt 36b is provided on the other drive pulley (not shown) and the pulley 35b of the rotary cleaning body 30b. The bearings 34a and 34b are fitted to the bearing portions 13a and 13b in the hooked state.

Next, the rotary shafts 56 and 5 formed on the rotary pipe 52 of the connecting pipe 50 in which the lead wire 57 is incorporated in advance.
6 are fitted into bearings 17 provided on both side walls of the suction port 15 of the lower case 10, and as shown in FIG.
The middle case 5 is arranged so as to be positioned at the tip of the second case 2. Also,
The connector 58 is connected to a connector (not shown) of the circuit device 60, the circuit device 60 and the electric motor 40 are connected by a lead wire 62, and the lead wire 62 is attached to the lead wire holding means 5a. Then the upper case 20
With the bumper 2 interposed, and the rotating shafts 56, 5
The suction port body A is assembled by fitting a bearing part (not shown) to the lower case 10 and positioning it in a predetermined state with respect to the lower case 10.

In this assembled state, the rotating shafts 56, 56 formed on the rotating pipe 52 of the connecting pipe 50 are attached to the lower case 10.
The bearing portion 17 and a bearing portion (not shown) of the upper case 20 are rotatably supported, and are vertically rotatable with respect to the main body case 1.

Next, the operation of the suction port body A will be described.

The suction port A is connected to an extension pipe (not shown), and the extension pipe is connected to a suction hose connected to an electric vacuum cleaner (not shown) for cleaning, which has been used for a long time. In the meantime, dust enters between the rotary shaft 56 and the bearing portion 17, that is, between the sliding contact surfaces of the two, and the dust that entered is rotated by the operation of the suction port A during cleaning. With the rotation of, it falls downward from the cutout portion 17b. Since the cutout portion 17b communicates with the suction port 15, the dust that has fallen into the cutout portion 17b is sucked by the suction air. Therefore, the dust that has entered between the sliding contact surfaces is the bearing surface 17 of the bearing portion 17.
b and the outer peripheral surfaces of the rotating shaft 56 do not adhere to each other, and neither of them is worn by dust. Therefore, since the suction port A does not rise up due to the poor rotation of the connection 50 during the cleaning operation without causing the poor rotation of the connection pipe 50, the suction port A is always maintained at a predetermined distance from the surface to be cleaned. Since the vehicle will run in the above condition, good dust can be absorbed.

During cleaning, the rotary cleaning members 30a, 30
The electric motor 40 that rotates and drives b is heated, but is efficiently cooled by the outside air flowing from the ventilation hole 22a through the electric motor housing chamber 41 and the cutout portion 17b by the suction action of the cleaner. In addition, the circuit component 6 mounted on the circuit device 60
Similarly, 0b is also cooled by the outside air flowing from the ventilation hole 22b through the circuit device housing chamber 61 and the cutout portion 17b.

Since the structure of the air passage for taking in the outside air can be easily formed by using the cutout portion 17b, the problem that the design is restricted can be solved.

Further, the dust that has flown into the notches 17b due to the airflow from the air flowing through the ventilation holes 22a and 22b and flowing through the notches 17b is easily sucked into the cleaner, and the rotating shaft 56 and the bearing surface are also easily sucked. The fine dust that has entered into the space 17a is also removed by the air flow, and the adhesion of dust can be prevented.

In the above embodiment, the notch 17b provided in the bearing 17 is communicated with the suction port 15, but
This is not limited to the suction port 15, but may be any location as long as it communicates with the air passage through which the suction air flows, that is, the inside of the suction air passage.

In the above embodiment, the rotary cleaning body 30a,
30b is provided, but the rotating shaft 56 of the connecting pipe 50 is provided.
The rotary cleaning body is not always necessary from the viewpoint of maintaining good rotation of the bearing 17 and the bearing 17, and may not be provided.

Although the ventilation holes 22a and 22b are formed in the upper case 20, they may be formed in the lower case 10.

[0034]

According to the invention of claim 1, which is constructed as described above, it is inserted between the outer peripheral surface of the fitting shaft of the connecting pipe and the bearing surface of the bearing which rotatably supports the fitting shaft. Since the dust falls downward from the notch opening in the bearing surface, the dust that has entered between the outer peripheral surface of the fitting shaft and the bearing surface of the bearing does not adhere to the outer peripheral surface and the bearing surface. The attachment of the dust does not hinder the rotation of the connecting pipe, and it is possible to obtain an effect of always maintaining a good rotation.

In addition to the effect of claim 1, the invention according to claim 2 has a structure in which the notch portion is also used as a ventilation hole, so that the air passage can be easily and simply constructed and the electric component member can be securely provided. It has an effect that it can be cooled.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire suction inlet of an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a view of the suction port body of the above embodiment as viewed from above.

FIG. 3 is a view of the suction port body of the above embodiment as seen from the lower surface.

FIG. 4 is a top view of a part of the upper case of the suction port body according to the above embodiment, which is cut away.

FIG. 5 is an exploded perspective view showing the relationship between the rotary shaft of the suction port body and the bearing portion of the main body case in the above embodiment.

FIG. 6 is a partial cross-sectional view of the suction port body of the above embodiment, taken along line XX in FIG.

[Explanation of symbols]

A Suction port body 1 Main body case 10 Lower case 11a Opening formed in the lower surface of the lower case (main body case) 11b Opening formed in the lower surface of the lower case (main body case) 15 Suction opening (suction air passage) 16 Side wall 17 Bearing part 17a Bearing surface 17b Notch 20 Upper case 22a Vent hole 22b Vent hole 30a Rotational cleaning body 30b Rotational cleaning body 40 Electric motor (electrical component member) 41 Electric motor storage chamber (electrical component storage chamber) 50 Connection pipe 51 Connection portion 56 Rotating shaft 60 Circuit device ( Electrical component) 61 Circuit device storage chamber (electric component storage chamber)

Claims (2)

[Claims] 1. A main body case having a suction air passage communicating with an opening formed on a surface to be cleaned and having a ventilation hole formed on an outer wall, and the suction air passage orthogonal to a longitudinal direction of the main body case. Bearing portions formed on both side walls, and notches formed on both side walls toward the surface to be cleaned and opened on a lower bearing surface of the bearing portion to communicate the suction air passage and the vent hole. And a suction opening having a suction opening opening to the suction air passage at the other end and a rotation shaft rotatably supported by the bearing portion on both sides of the suction opening. A suction port body for an electric vacuum cleaner, comprising: a connection pipe provided with a section. 2. A main body case having a suction air passage communicating with an opening formed in the surface on the surface to be cleaned and having a ventilation hole formed in an outer wall, and a rotary cleaning body rotatably provided in the main body case. A bearing portion formed on both side walls of the suction air passage orthogonal to the longitudinal direction of the main body case, and formed on the both side walls toward the surface to be cleaned and opening on a lower bearing surface of the bearing portion. Then, the notch for communicating the suction air passage and the ventilation hole, and the suction opening opening to the suction air passage on the other end side with a connecting portion provided on one end side and the bearing portion on both sides of the suction opening. A connection pipe provided with a suction portion that forms a rotation shaft that is rotatably supported, and one end side that is provided in the main body case communicates with the vent hole and the other end side communicates with the cutout portion, and Equipped with an electrical component storage room for storing electrical components The suction port of the vacuum cleaner, characterized in that was.