JPH07322981A - Suction tool for vacuum cleaner - Google Patents

Abstract

PURPOSE:To easily fit or remove an agitator for maintenance with light operating force in a suction tool for a vacuum cleaner rotating the agitator and discharging dust during the cleaning work on a carpet. CONSTITUTION:The width size of a bearing support section 32 formed on a lower suction tool 15 is set larger than the width size of a bearing B25. When a brush cover 33 is not fitted to a suction tool main body 10, a belt 31 is loosened. When the brush cover 33 is fitted, an excitation section 34 provided on the back face of the brush cover 33 excites the bearing B25 to the front direction of the suction tool main body 10 to optimize the tension of the belt 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner suction tool.

[0002]

2. Description of the Related Art A conventional vacuum cleaner suction tool will be described below.

As shown in FIG. 4, an agitator 2 and a drive source 4 for driving the agitator 2 via a belt 3 are provided in the suction tool 1, and in the carpet cleaning, the agitator 2 is rotated to rotate the agitator 2 on the carpet. It had a structure for sweeping out the dust (see, for example, Japanese Utility Model Laid-Open No. 3-50857).

[0004]

However, in such a structure, the bearing width for the axial support of the agitator 2 and the bearing support portion width are formed to be substantially the same, and the bearing is inserted deep into the bearing support portion. Since the tension of the belt 3 is configured to be optimal in this state, when the agitator 2 is attached or detached for maintenance or the like, a force acts in a direction in which the distance between the rotation center of the agitator 2 and the rotation center of the drive source 4 increases. The belt 3 is pulled by force, and the tension of the belt 3 causes the bearing and the rear wall of the bearing support portion to rub against each other strongly, which requires an excessive force for the work, and also an excessive tension is applied to the belt 3. Therefore, there is a problem that the life of the belt 3 is shortened.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a suction tool for an electric vacuum cleaner which has good operability, durability, and usability.

[0006]

In order to achieve this object, in the suction device for an electric vacuum cleaner of the present invention, when the brush cover is attached to the suction device body, the biasing portion of the brush cover regulates the bearing position. However, the belt tension is optimally maintained.

[0007]

In this structure, when the brush cover is removed for maintenance of the agitator, etc., the bearing becomes movable in the rearward direction of the suction tool, so that the belt tension is loosened and the belt tension causes the belt tension and the rear wall of the bearing support portion to move. The agitator can be easily attached and detached without the need for strong rubbing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the suction tool body 10 is formed by connecting an upper suction tool 14, a brush cover 33, and a lower suction tool 15 through a bumper 11, a rear bumper A12, and a rear bumper B13. A suction chamber 17 having a lower opening as a suction port 16 is formed inside. The center of the suction chamber 17 is located at the rear of the suction tool body 10 and is connected to the upper suction tool 14 and the lower suction tool 15 so that the communication pipe 1 can be lifted and lowered.
8. Connection pipe 19 rotatably connected to the communication pipe 18.
An extension pipe that is connected to the suction pipe of the electric vacuum cleaner via a hose is detachably connected to the connection pipe 19. A motor 20 for driving an agitator and a control unit 21 for controlling the motor 20 are internally provided on the left and right of the communication pipe 18, and power is supplied by a power cord 22. The agitator 23 provided in the suction chamber 17 in parallel with the suction chamber 17
Are rotatably held by bearings A24 and B25 arranged on both side chamber walls. The agitator 23 is composed of a substantially cylindrical rotor 26 and an agitator 27 made of a flexible material that is continuously mounted on the outer peripheral surface in the longitudinal spiral direction. A pulley A29 is press-fitted and fixed to a motor shaft 28 of the motor 20, and the agitator 23
The driving force is transmitted via the belt 31 to the pulley B30 that is adhesively fixed to the agitator 23 to rotate the agitator 23. The lower suction tool 15 is provided with a bearing support portion 32 having a U-shaped notch, and the bearing B25 is inserted therein, but the width of the bearing support portion 32 is larger than the front-rear width of the bearing B25. The bearing B25 can be moved backward in the suction tool body 10 and the belt 31 can be loosened. When the brush cover 33 is attached to the suction tool body 10, the urging portion 34 provided on the lower surface of the brush cover 33 urges the bearing B25 in the forward direction of the suction tool body 10 to optimally maintain the tension of the belt 31. To do.

When hair is wound around the agitator 23 and the like, the brush cover 33 is removed when the agitator 23 is detached for maintenance. At that time, as shown in FIG. 3, the lower surface of the brush cover 33 is biased. Part 34 is bearing B
Since the bearing B25 is moved backward in the suction tool body 10, the belt 31 is loosened at the same time as the bearing B25 is released, and in this state the distance between the rotation center of the agitator 23 and the rotation center of the motor shaft 28 is increased. Even if the agitator 23 is removed, the bearing B25 and the rear wall of the bearing support portion 32 do not rub strongly against each other due to the looseness of the belt 31, and the work can be easily performed. After the maintenance work is completed, the agitator 23 is attached. However, the loosening of the belt 31 does not cause the rubbing phenomenon of the bearing B25 and the rear wall of the bearing support portion 32, and the agitator 23 can be easily attached. Also, the belt 31 is used every time the agitator 23 is attached and detached.
Since it is possible to prevent excessive tension from being applied to the belt 3
The durability of 1 can also be dramatically improved.

[0010]

As is apparent from the above embodiments, according to the present invention, when the agitator is attached or detached for maintenance or the like, the belt is loosened by removing the brush cover, so that the bearing and the rear wall of the bearing support portion are loosened. It is possible to realize an excellent vacuum cleaner suction tool that is easy to work with a light operating force, has good operability, is durable, and is easy to use without having to rub strongly against each other.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross section of a suction tool for an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a plan view of the vacuum cleaner suction tool with an upper suction tool and a brush cover removed.

FIG. 3 is a side view showing a partial cross section of the vacuum cleaner suction tool with a brush cover removed.

FIG. 4 is a side view showing a partial cross section of a conventional vacuum cleaner suction tool.

[Explanation of symbols]

 10 Suction Tool Main Body 16 Suction Port 20 Motor 23 Agitator 25 Bearing B 31 Belt 33 Brush Cover 34 Energizing Part

Claims (1)

[Claims] 1. A suction tool body having a suction port, a brush cover detachably attached to the suction tool body, a rotatable agitator disposed at the suction port, a motor for driving the agitator, and the agitator. And a belt for transmitting the driving force of the motor to the agitator. When the brush cover is attached to the suction tool body, the position of the bearing is regulated to optimize the tension of the belt. A suction tool for an electric vacuum cleaner, which is provided with a biasing portion for holding the vacuum cleaner.