JPH07308269A - Self-running vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent a self-running unit from being enclosed with heat of a running motor in a simple constitution. CONSTITUTION:The space in a self-running unit 4 connected to a vacuum cleaner main body is communicated with the suction side of a draft duct of the vacuum cleaner main body by a cooling air path 20, the air in a self-running unit 4 is sucked in the draft duct by an air blower of the vacuum cleaner main body, and heat generated by a motor provided in the self-running unit 4 is carried with the current of sucked air to be discharged to the outside of the self-running unit 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled vacuum cleaner,
Particularly, the present invention relates to a self-propelled cleaner capable of preventing heat of a traveling motor from being trapped in a self-propelled unit with a simple structure.

[0002]

2. Description of the Related Art Conventionally, as a self-propelled cleaner, for example, as proposed in Japanese Patent Application No. 5-279794, a self-propelled unit and a self-propelled unit around a horizontal axis and a vertical axis are provided. Some include a cleaner body that is rotatably connected.

This self-propelled unit includes a low vertical cylindrical case, a cylindrical cover case that covers the lateral periphery and the upper surface of the case, and a left-right pair rotatably supported at the bottom of the cover case. Equipped with wheels and two motors arranged in the cover case to drive the wheels individually, the traveling direction can be changed by changing the rotational speed or the rotational direction of both motors.

[0004]

In this conventional self-propelled cleaner, the motor for driving the wheels is arranged in the case,
Moreover, since the case is covered with the cover case, heat generated by the motor is likely to be trapped inside the case, which is disadvantageous in enhancing the durability of the motor, the speed reducer that links the motor and the wheels, and the wheels. I found out.

The present invention has been made in view of the above circumstances, and prevents the self-propelled unit from being accumulated with heat of the traveling motor, thereby improving the durability of the self-propelled unit. The purpose is to provide a vacuum cleaner.

[0006]

SUMMARY OF THE INVENTION The present invention provides a self-propelled unit having a pair of left and right wheels, a traveling motor that individually drives each wheel, and a case that surrounds both traveling motors. In order to achieve the above object, a self-propelled cleaner having a cleaner body mounted therein is characterized in that a cooling air passage is provided to connect the air passage of the cleaner body and the space in the case. It is a thing.

[0007]

According to the present invention, the space in the case is communicated with the suction side or the exhaust side of the air duct of the cleaner body by the cooling air passage, and when the space in the case is communicated with the suction side, the heat of the motor is generated. The air in the case heated by is sucked into the air passage through the cooling air passage, or when the space in the case communicates with the exhaust side, the air is sent from the air passage through the cooling air passage. By pushing out the air in the case heated by the heat of the motor with the air, the heat in the case is discharged to the outside of the case.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A self-propelled cleaner according to an embodiment of the present invention will be described in detail with reference to the drawings.

A self-propelled cleaner according to an embodiment of the present invention shown in FIG. 1 includes an attachment 2 rotatably connected to a lower portion of a cleaner body 1 about a horizontal axis, and FIGS. As shown, the self-propelled unit 4 is arranged inside the cover-shaped cylindrical cover case 3 of the attachment 2.

The self-propelled unit 4 has a case 5 formed in a cylindrical shape with a low vertical axis coaxial with the cover case 3 whose upper and lower surfaces are closed, and a lower peripheral portion thereof projects downward from the lower surface of the case 5. As described above, a pair of left and right wheels 6 rotatably supported on the lower portion of the case 5 are arranged in the case, and each wheel 6 is driven in the forward rotation direction and the reverse rotation direction via the speed reducer 7, respectively. As shown in FIG. 3, a cylindrical neck portion 10 provided with two motors 8 and extending upward from the central portion of the upper wall 9 of the case 5 has an upper wall 11 of the cover case 3.
Is rotatably fitted around the vertical axis.

The self-propelled unit 4 for the cover case 3 is provided above the center of the upper wall 11 of the cover case 3.
Is capped with a rotor revolving frame 12 for detecting the rotational phase thereof.

On the front side of the cover case 3, long suction beaks 14 are arranged on the left and right, and the left and right both sides of the suction beak 14 and the left and right outer sides of the rear part of the cover case 3 are freely wheeled to the floor surface. 15 are provided.

A rotating brush 16 is provided on the lower surface of the suction beak 14.
Is provided on the front surface of the cleaner body 1 through the space 18 in the suction beak 14, the duct, the dust collection chamber provided in the cleaner body 1 and the blower from the suction opening 17 Further, an air passage extending to the exhaust port is provided, and a cooling air passage 20 for communicating the internal space 19 of the case 5 with the space on the suction side of the air passage, that is, the space 18 in the suction beak 14 is provided.

This cooling air passage 20 is, as shown in FIG.
Branch portions 20a and 20b extending from the upper side of each motor 8 inside the case 5 to the central portion, and the branch portions 20a and 20b.
Is raised from the gathering point into the neck 10, penetrates the upper wall of the cap 13, and then extends forward along the upper surfaces of the cap 13 and the cover case 3 and from the front edge of the cover case 3 to the suction beak 14 It is formed in a tube made of, for example, a silicone resin having a collecting portion 20c that penetrates the wall.

A vent hole 21 is formed in the upper wall 9 of the case 5 and the upper wall 11 of the cover case 3 as needed.

In the self-propelled cleaner according to this embodiment, the internal space 19 of the case 5 surrounding the motor 8 is communicated with the space 18 on the suction side of the air flow path by the cooling air path 20, so that the cleaning is performed during cleaning. The air in the case 5 is sucked into the air passage and flows, and the heat in the case 5 is discharged to the outside of the case 5 along with the flow of the air, whereby it is possible to prevent heat from being trapped in the case 5. In addition, as the air is sucked into the air passage, cool outside air flows in from the ventilation port 21, and the outside air cools the motor 8, the speed reducer 7 and the wheels 6, so that heat is generated in the case 5. It is possible to prevent the muffler more reliably.

By thus preventing heat from staying in the case 5, the durability of the motor 8, the speed reducer 7 and the wheels 6 is improved.

Further, since the suction force of the blower of the cleaner body 1 is used for ventilation in the case 5, it is not necessary to separately provide a blower for ventilation in the case 5, and the structure is simple and can be implemented at low cost. .

In the self-propelled cleaner according to another embodiment of the present invention shown in FIGS. 4 and 5, instead of the cooling air passage 20, the exhaust side of the air passage of the cleaner body 1, that is, from the air blower. Is provided with a cooling air passage 22 that communicates the downstream side portion with the internal space 19 of the case 5.

This cooling air passage 22 is led out from the exhaust side of the air passage of the cleaner body 1, and its end portion extends through the cap 13 and the neck portion 10 of the case 5 to the bottom portion of the case 5. The other structure is the same as that of the above-described embodiment, and the detailed description thereof will be omitted to avoid duplication.

In the self-propelled cleaner according to this embodiment, the airflow discharged from the air blow passage of the cleaner body 1 is pushed into the case 5 through the cooling air passage 22 so that the hot air in the case 5 is vented. To prevent heat from being trapped inside the case 5.

The other operations and effects of this embodiment are the same as those of the above-mentioned one embodiment, and therefore their explanations are omitted to avoid duplication.

[0023]

As described above, the self-propelled cleaner according to the present invention is provided with the cooling air passage for communicating the air passage of the cleaner body with the space in the case, so that the air in the case is Through the cooling air passage to the intake side of the air passage, and then carry the heat in the case to the outside of the case by riding on the air flow, or from the exhaust side of the air passage to the air through the cooling air passage to the case. It is possible to prevent heat from being trapped inside the case 5 by pushing it inside and pushing out the hot air inside the case to the outside of the case, which makes it possible to protect the wheels, reduction gears, motors, etc. arranged inside the case. You can improve your sex.

Moreover, by simply adding a cooling air passage to the conventional self-propelled cleaner, it is not necessary to provide a special ventilation motor for cooling or ventilation in the case, so that the structure is simple and inexpensive. Can be carried out.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a plan view of an essential part of an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional side view of a main part of one embodiment of the present invention.

FIG. 4 is a plan view of an essential part of another embodiment of the present invention.

FIG. 5 is a vertical sectional side view of a main part of another embodiment of the present invention.

[Explanation of symbols]

 1 Vacuum cleaner body 2 Attachment 3 Cover case 4 Self-propelled unit 5 Case 6 Wheel 8 Motor 18 Space 19 Internal space 20 Cooling air passage 22 Cooling air passage

Claims (3)

[Claims] 1. A self-propelled unit having a pair of left and right wheels, a traveling motor that individually drives each wheel, and a case that surrounds both traveling motors, and a cleaner body mounted on the self-propelled unit. A self-propelled cleaner provided with a cooling air duct that connects the air duct of the cleaner body and the space in the case. 2. The self-propelled cleaner according to claim 1, wherein the cooling air passage communicates the space in the case with the suction side of the air passage of the cleaner body. 3. The self-propelled cleaner according to claim 1, wherein the cooling air passage communicates a space in the case with an exhaust side of an air passage of a cleaner body.