JP3140946B2 - Vacuum cleaner suction body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A suction port used in a conventional vacuum cleaner generally comprises a main body case and a rotatable connection pipe provided in the main body case. The cleaning is performed by connecting to an extension tube connected to a suction hose connected to the suction hose. In the mounting structure for rotatably mounting the connection pipe to the main body case, the rotation shafts provided on both sides of the distal end portion of the connection pipe are rotatably supported by bearings formed in the main body case. .

When used for a long time, dust enters between the bearing surface of the bearing and the outer peripheral surface of the rotating shaft,
The dust that has entered adheres 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 is worn and the connection pipe does not rotate smoothly. As a result, when the suction port body is moved during cleaning, for example, the suction port body rises from the floor surface and the lower surface of the suction port body cannot maintain a predetermined gap with respect to the floor surface, so that good dust suction cannot be performed. There is.

[0004] A rotary brush having brush bristles around it is provided in the body case, and the rotary brush is driven to rotate by an electric motor. The electric motor is housed in a motor housing provided in the main body case.However, providing a cooling air passage for cooling the electric motor in the main body case requires a small space in the main body case. However, there is a problem that the design is restricted in providing the air path.

[0005]

As described above, in a conventional suction port of a vacuum cleaner, a bearing provided on a main body case for rotatably supporting a rotation shaft of a connecting pipe and this fitting shaft. Dust that has entered between the inner and outer surfaces of the fitting shaft adheres to the outer peripheral surface of the fitting shaft and the bearing surface of the bearing, which hinders the smooth rotation of the connection pipe. There is a problem that the gap between the surface and the surface to be cleaned is not maintained at a predetermined gap, and good dust absorption cannot be performed. In addition, there is a problem that the design is restricted in providing an air passage for cooling the electric motor.

[0006]

SUMMARY OF THE INVENTION The invention according to claim 1 solves the problem that the smooth rotation of the conventional connecting pipe is hindered, and is connected to an opening formed on the surface to be cleaned. A main body case having a suction air passage formed therein and having a ventilation hole formed in an outer wall, and formed on both side walls of the suction air passage orthogonal to a longitudinal direction of the main body case and facing upward.
A bearing portion having a lower bearing surface , and a notch portion formed on the both side walls toward the surface to be cleaned and opened to the lower bearing surface to communicate the suction air passage and the ventilation hole. ,
The lower with the both sides of the suction opening has a suction opening which opens into the suction air passage at the other end a connection portion provided on one end side
Sliding contact with the side bearing surface and pivotally supported by the bearing part
And a connection pipe provided with a suction portion having a horizontal rotation shaft . Claim 2
The described invention solves the problem that the smooth rotation of the conventional connection pipe is hindered, and also eliminates the design restriction of forming an air passage for cooling the electrical components , and the surface to be cleaned is A main body case having a suction air passage communicating with an opening formed on the side surface and having a ventilation hole formed in an outer wall, a rotary cleaning body rotatably provided in the main body case, and a longitudinal direction of the main body case. On both sides of the suction air duct
A bearing portion formed and having an upwardly-facing lower bearing surface, and the suction air passage and the ventilation hole formed on the both side walls toward the surface to be cleaned and open to the lower bearing surface. It has a cut-out portion to be communicated with, a connection portion provided at one end side, and a suction opening opened to the suction air passage at the other end side, and slides on the lower bearing surface on both sides of the suction opening to rotate with respect to the bearing portion. A connection pipe provided with a suction portion forming a laterally pivotable shaft that is rotatably supported, and provided inside the main body case with one end communicating with the vent hole and the other end communicating with the notch, respectively. An electrical component storage chamber for storing electrical components is provided.

[0007]

[Action] Since the above construction, according to claim 1 invention, the lateral pivot axis of the connecting tube the outer peripheral surface and the rotation axis of the bearing surface of the bearing portion for rotatably supported Dust that has entered between the bearings drops downward from the cutout portion that opens in the upwardly-facing lower bearing surface of the bearing portion, so that dust that has entered between the outer peripheral surface of the rotary shaft and the bearing portion is removed by the outer peripheral surface and the bearing. Adhesion to the surface is prevented, and the adhesion of the dust does not hinder the rotation of the connection pipe.

According to the second aspect of the present invention, in addition to the function of the first aspect, the use of the notch as a ventilation hole facilitates the configuration of the air path and ensures that the electrical component is cooled.

[0009]

Next, an embodiment of the present invention will be described with reference to FIGS.
It will be described based on. FIG. 1 is a perspective view showing the entire suction port body, FIG. 2 is a view of the suction port body as viewed from above, and FIG. 3 is a view of the suction port body as viewed from below, that is, from the floor side. FIG. 4 is a view in which a part of an upper case of the suction port body is cut away and viewed from above, and FIG. 5 is a view showing a rotation shaft of the suction port body connection pipe and a bearing portion provided in a 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 FIGS. 1 and 4, etc.
Is composed of a main body case 1, a rotary cleaning body 30a, 30b disposed in the main body case 1, an electric motor 40 for rotatingly driving the rotary cleaning bodies 30a, 30b, and a connection pipe 50 provided on the rear side of the main body case 1. It is configured.

As shown in FIGS. 1 and 6, the main body case 1 is composed of a lower case 10 and an upper case 20, and the lower case 10 and the upper case 20 are shown in FIG. Are integrally connected by three screws 3 as described above. The lower surface of the lower case 10, that is, the surface on the floor side, which is the surface to be cleaned, is provided with a pair of openings 11a and 11b formed along the longitudinal direction as shown in FIG. The rotary cleaning bodies 30a and 30b are arranged on the base 11b such that the outer peripheral portions thereof are slightly exposed. Further, the side wall of the lower case 10 on the longitudinal direction side is formed as shown in FIG.
The bearings 12a, 13a and 1 having openings on the upper case 20 side corresponding to the openings 11a and 11b, respectively.
2b and 13b are provided. 3 and FIG.
As shown, the lower case 10 is provided with a center running wheel mounting portion 14 formed inwardly recessed on the lower surface of the central portion, and a center running wheel 81 is mounted on the center running wheel mounting portion 14. As shown in FIG. 6, a suction port 15 as a suction air passage is formed in the upper part of the center traveling wheel mounting portion 14 of the lower case 10 in FIG. 6 , and the suction port 15 is formed with the openings 11a and 11b. Is in communication with The upper portion of the suction port 15 is covered by the middle case 5.

Then, as shown in FIG.
A bearing portion 17 is formed on each of the lower case 10, that is, the side walls 16 on both sides formed to face each other in the longitudinal direction of the main body case 1. The bearing portion 17 is formed in a semicircular shape having an open top, also of its upward
The lower bearing surface 17a is provided with a notch 17b that is open to the bearing surface 17a and that is formed downward and in the direction of the floor surface to be cleaned. Further, it is located outside the both side walls 16 and is separated by a predetermined distance.
There is provided a positioning wall 16a in which 6b is formed. The positioning wall 16a comes into contact with both ends of a rotation shaft 56 of the connecting pipe 50 described later to restrict the movement of the rotation shaft 56 in the axial direction .
Things.

The side walls 16 and the positioning walls 16
4 and 5 (when viewed from the front side of the suction port body A), a motor storage chamber 41 is provided on the right side as an electrical component storage chamber for storing the electrical motor 40 as an electrical component. Further, on the left side, a circuit device housing as an electric member housing room for housing a circuit device 60 as an electric member including a wiring substrate 60a and an LED lamp, a resistor, and other circuit components 60b mounted on the wiring substrate 60a. A chamber 61 is provided. The electric motor storage room 41 and the circuit device storage room 61 correspond to the positioning wall 16a.
The opening 15 communicates with the suction port 15 through a notch 16b of the bearing portion 17 and a notch 17b of the bearing portion 17.

[0014] As shown in FIG .
a and 30b are composed of cylindrical members 31a and 31b and brush bodies 32a and 32b formed of brush bristles or soft thin plate members on the outer periphery of the cylindrical members 31a and 31b,
Bearing portions 12a, 1a, 1b, 1c provided on the lower case 10 are provided at both ends of the rotary cleaning members 30a and 30b, respectively.
Bearings 33a, 34a and 33b, 34b fitted and attached to 3a, 12b, 13b are attached. Pulleys 35a and 35b are provided on both sides of the rotary cleaning bodies 30a and 30b, respectively, on the side where the bearings 34a and 34b are attached. Then, the bearings 33a, 34a and 33b, 34b are connected to the bearing portions 12a, 13a, and 1 provided on the lower case 10.
2b, 13b, the rotating cleaning body 30
a and 30b are attached to the lower case 10.

FIG. 1 and FIG.
As shown in FIG. 2, a cut-out portion 21 is formed in the rear central portion where a connection pipe 50 is disposed so as to be rotatable in the vertical direction.
As shown in FIGS. 1 and 2, ventilation holes 22 a and 22 b are provided on both side walls of the upper case 20.
As shown in FIG. 4, 2a communicates with the motor storage chamber 41 which communicates with the suction port 15 via the notch 16b and the notch 17b, and the vent hole 22b similarly has the notch 16b.
b, it communicates with the circuit device storage chamber 61 which communicates with the suction port 15 via the notch 17b. Therefore, when air is sucked into the connection pipe 50 through the suction port 15 of the main body case 10 during cleaning or the like, the outside air sucked from the ventilation hole 22a passes through the motor housing chamber 41, the notch 16b, and the notch 17b. As a result, the electric motor 40 is cooled by the outside air. The outside air sucked from the vent hole 22b flows into the suction port 15 through the circuit device storage chamber 61, the notch 16b and the notch 17b, and the circuit component 60b
Is cooled. Although not shown in the upper case 20, the rotary cleaning bodies 30a, 30b fitted to the bearings 12a, 13a and 12b, 13b of the lower case 10 are provided.
Of the bearings 33a, 34a and 33b, 34b are provided. Also, the upper case 20
The bearings 17 provided on the lower case 10
And a semi-circular bearing (not shown) corresponding to.

As shown in FIG . 4, the output shaft 42 of the motor 40 housed in the motor housing chamber 41 is connected to a gear device 43, from which a drive pulley 44a is attached at the tip. A pair of output shafts 44 are provided side by side in the vertical direction (only the upper drive pulley is shown in FIG. 4), and the upper drive pulley 44a and the rotary cleaning body 30 are provided.
A drive belt 36a is hung on the pulley 35a. The lower drive pulley (not shown) and the pulley 35b of the rotary cleaning body 30b similarly have a drive belt 36b.
Is hung. Then, the pair of drive pulleys 4
The rotation direction of the rotary cleaning member 30a is indicated by an arrow a in FIG.
Direction, and the rotary cleaning body 30b is set to rotate in the direction of arrow b.

Next, the connection pipe 50 will be described. As shown in FIG. 4 and FIG.
The rotating tube 51 has a and a rotating tube 52 in which the rotating tube 51 is fitted rotatably in the circumferential direction. The rotary tube 51 is provided with a connection terminal storage part 53a closed by a lid 53.
3a is connected to the connection portion 51a.
It is provided so as to protrude to the side. When the connecting portion 51a of the rotary pipe 51 is fitted and connected to an extension pipe connected to a suction hose connected to a vacuum cleaner main body (not shown), the connection terminal 54 is fitted to a female terminal provided on the extension pipe. Are adapted.

Then, as shown in FIG.
Is a suction part 52a, and the suction part 52a
Is formed with a suction opening 55 which is open to the suction port 15 of the main body case 1, and has a horizontal wall formed of an annular wall on both sides.
The rotation shaft 56 of is formed. The rotating shaft 56 is connected to the bearing 17 formed on the lower case 10 and the upper case 20.
And is rotatably supported by a bearing portion (not shown) formed at the bottom. When the rotation shaft 56 rotates, the rotation shaft rotates while sliding on the bearing surface 17 a of the bearing portion 17, so that dust entering between the bearing portion 17 and the rotation shaft 56 rotates. At this time, the dust falls downward from the notch portion 17b, and the fallen dust is sucked into the cleaner by the suction wind, and the dust attached to the bearing surface 17a and the surface of the rotating shaft 56 is discharged from the vent holes 22a and 22b. It is sucked by the outside air which is sucked and flows into the suction port 15 and can prevent the sticking.

A lead wire 57 connected to the connection terminal 54 attached to the connection terminal housing as shown by a two-dot chain line in FIG. A connector 58 is connected to the lead wire 57, and this connector 58 is connected to a connector (not shown) provided on the wiring board 60a.

Further, as shown in FIG.
The lead wire holding means 5a, which is composed of two holding projections provided apart from each other with a small gap therebetween, is provided on the upper surface of the suction port 1.
5 are provided substantially at the upper portions of both side walls 16 of the circuit device 5.
The lead wire 62 connecting the motor 0 and the motor 40 is pinched and held. The lower case 10
The front running wheels 82, 82 are provided on both front sides of the vehicle, and the rear running wheels 8 are located on the rear side near both sides of the connecting pipe 50.
3 and 83 are provided respectively. As shown in FIG. 3, a sensor wheel 84 protruding from the lower surface of the lower case 10 is provided on the lower surface of the lower case 10. It detects the gap between the lower surface of the lower case 10 and the surface to be cleaned. Based on the detection result, the electric blower is controlled via the circuit device 60 so as to adjust the suction air amount of the cleaner body. .

In FIGS. 1 and 2 , reference numeral 86 denotes a name plate .
87 is a seal lip.

Next, the assembling of the suction opening A constructed as described above will be described.

First, the center running wheel 81,
The front running wheel 82, the rear running wheel 83, the electric motor 40, and the circuit device 60 are attached by a fixture (not shown). Next, the rotary cleaning bodies 30a, 30b are respectively connected to the bearings 33a, 34a and 33b, 34b by the lower case 1.
No. 0 bearing portions 12a, 13a and 12b, 13b. In this arrangement, the drive belt 36a is mounted on the gear unit 43, the drive pulley 44a and the pulley 35a of the rotary cleaning body 30a, and the drive belt 36b is mounted 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, 5 formed on the rotary pipe 52 of the connecting pipe 50 in which the lead wires 57 have been incorporated in advance.
6 are fitted into bearing portions 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 disposed at the tip of the second case 2. Also,
The connector 58 is connected to a connector (not shown) of the circuit device 60, and the circuit device 60 and the motor 40 are connected by a lead wire 62, and the lead wire 62 is attached to the lead wire holding means 5a. Then upper case 20
And the rotating shafts 56, 5
After positioning in a predetermined state with respect to the lower case 10 while fitting a bearing part (not shown) to 6, the suction port body A is assembled by connecting the two with the screw 3.

In this assembled state, the rotating shafts 56 formed on the rotating tube 52 of the connecting tube 50 are
Is rotatably supported by a bearing 17 of the upper case 20 and a bearing (not shown) of the upper case 20, and is rotatable vertically 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 a vacuum cleaner (not shown) for cleaning, but has been used for a long time. Dust enters between the rotating shaft 56 and the bearing portion 17, that is, between the sliding contact surfaces of the two, and the entered dust is rotated by the operation of the suction port body A during cleaning. As it rotates, it falls downward from the notch 17b. Since the notch 17b communicates with the suction port 15, dust that has fallen into the notch 17b is sucked by the suction air. Therefore, the dust that has entered between the sliding contact surfaces is applied to the bearing surface 17 of the bearing portion 17.
b and the outer peripheral surface of the rotating shaft 56, and neither of them is worn by dust. Therefore, the suction port body A is always maintained at a predetermined distance from the surface to be cleaned because the suction port body A does not occur during the cleaning operation without lifting or the like due to the poor rotation of the connection space 50 without the rotation failure of the connection pipe 50 occurring. In this state, the vehicle travels in a state in which the dust is collected and good dust can be absorbed.

During cleaning, the rotary cleaning bodies 30a, 30a
The motor 40 that rotates the b generates heat, but is efficiently cooled by the outside air flowing through the motor housing 41 and the notch 17b from the vent hole 22a by the suction action of the cleaner. In addition, the circuit component 6 mounted on the circuit device 60
Similarly, Ob is cooled by the outside air flowing from the vent hole 22b through the circuit device storage chamber 61 and the notch 17b.

Further, since the configuration of the air passage for taking in the outside air can be easily configured by using the notch 17b, the problem of being restricted by design can be solved.

Further, dust that flows into the notch 17b due to the airflow from the outside holes 22a and 22b and flows through the notch 17b is easily sucked into the vacuum cleaner, and the rotating shaft 56 and the bearing surface. The fine dust that has entered the gap 17a is also eliminated by the airflow, thereby preventing dust from adhering.

Although the notch 17b provided in the bearing 17 is connected to the suction port 15 in the above embodiment,
This is not limited to the suction port 15, but may be any part as long as it is in communication with the air path through which the suction air flows, that is, the inside of the suction air path.

In the above embodiment, the rotary cleaning body 30a,
30b is provided, but the rotating shaft 56 of the connecting pipe 50 is provided.
From the viewpoint of maintaining good rotation between the bearing and the bearing portion 17, the rotary cleaning body is not always necessary, 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 claim 1, wherein the structure described above according to the present invention invention, the lateral pivot axis of the connecting tube the outer peripheral surface and the rotation axis of the bearing surface of the bearing portion for rotatably supported Dust that has entered between falls down from the notch opening in the upwardly facing lower bearing surface , so that dust that has entered between the outer peripheral surface of the rotary shaft and the bearing portion adheres to the outer peripheral surface and the bearing surface. it is prevented that, can maintain a good working rotating never rotate the connecting tube is inhibited by attachment of the dust

According to a second aspect of the present invention, in addition to the effect of the first aspect, the cut-out portion is commonly used as a ventilation hole, so that the air path can be easily and easily formed, and the electric component can be reliably formed. It has the effect of being able to cool.

[Brief description of the drawings]

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

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

FIG. 3 is a view of the suction port body of the embodiment as viewed from below.

FIG. 4 is a view of a part of an upper case of the suction opening body of the above embodiment, which is cut away and viewed from above.

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

FIG. 6 is a partial cross-sectional view taken along line XX of FIG. 4 of the suction port body of the embodiment.

[Explanation of symbols]

A Suction port body 1 Body case 10 Lower case 11a Opening formed on the lower surface of lower case (body case) 11b Opening formed on the lower surface of lower case (body case) 15 Suction port (suction air path) 16 Side wall 17 Bearing 17a Bearing surface 17b Notch 20 Upper case 22a Vent hole 22b Vent hole 30a Rotary cleaning body 30b Rotary cleaning body 40 Electric motor (electrical member) 41 Motor storage room (electrical member storage room) 50 Connection pipe 51 Connection part 56 Rotating shaft 60 Circuit device ( Electrical components) 61 Circuit device storage room (Electric components storage room)

Claims (2)

(57) [Claims] 1. A main body case having a suction air passage communicating with an opening formed on the surface to be cleaned and having a ventilation hole formed on an outer wall, and a suction air passage orthogonal to a longitudinal direction of the main body case. Lower shaft formed on both side walls and facing upward
A bearing portion having a receiving surface, a notch formed on the both side walls toward the surface to be cleaned and opened to the lower bearing surface to communicate the suction air passage with the ventilation hole; And a suction opening opened to the suction air passage at the other end side, and the lower bearing surface is provided on both sides of the suction opening.
A connection pipe provided with a suction part which forms a lateral rotation shaft which is rotatably supported by said bearing part in sliding contact with said connection part. Mouth. 2. A main body case having a suction air passage communicating with an opening formed on the surface to be cleaned and having a ventilation hole formed in an outer wall, and a rotary cleaning member rotatably provided in the main body case. A lower shaft formed on both side walls of the suction air passage orthogonal to a longitudinal direction of the main body case and facing upward;
A bearing portion having a receiving surface, a notch formed on the both side walls toward the surface to be cleaned and opened to the lower bearing surface to communicate the suction air passage with the ventilation hole; And a suction opening opened to the suction air passage at the other end side, and the lower bearing surface is provided on both sides of the suction opening.
A connecting pipe provided with a suction portion which is formed a lateral <br/> rotation shaft that sliding contact is rotatably supported to the bearing portion, the one end side is provided in the main body case into the vents A suction port body for an electric vacuum cleaner, comprising: an electric component storage chamber for storing an electric component therein, the other end being in communication with the notch.