JPH04312426A - Vacuum cleaner floor suction device - Google Patents

Abstract

PURPOSE:To suppress the temperature rise at a bearing section generated while a main agitator and auxiliary agitators provided at its end sections are rotated. CONSTITUTION:A main agitator 32 and auxiliary agitators 37 at its end sections are provided, and the auxiliary agitators 37 are protruded to the outer periphery from the periphery of a nearly cylindrical rotor 46 and outwardly from side faces of a suction tool. The wind by a stirring blade 47 inclined to the rotation direction flows in the direction of bearings A34, B35.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor suction device for a vacuum cleaner having a main and sub agitator.

0002

[Prior art] This type of floor suction device is
It was constructed like the one described in No. 32851. That is, in FIG. 3, the stirring blade 2 of the sub-agitator 1 is
It protrudes from the outer periphery of the rotor 3 in a trumpet-like manner toward an opening A5 formed at both ends of the floor suction tool 4. When the main agitator 6 is rotated, the stirring blades 2 penetrate to the base of the fibers in the carpet and scrape up elongated fibrous dust such as hair, making it particularly effective for cleaning corners of rooms where the main agitator 6 is difficult to work with. It is something.

0003

[Problems to be Solved by the Invention] When the main agitator 6 rotates, the metal 8 is rotated due to rotational sliding friction between the shaft 7 that connects the main agitator 6 and the sub-agitator 1 and the metal 8 that rotatably holds the shaft 7. Heat is generated and the temperature of the bearing A9 that holds the metal 8 rises, but in normal use, the floor suction tool 4 is adsorbed to the cleaning surface, so the intake air flow flows into the center side from the opening A5, and the above-mentioned Bearing A
The temperature should be below the heat distortion temperature of 9.

However, if you leave the floor suction device 4 upside down and the main agitator 6 still rotating while trying to finish other tasks during cleaning, the intake air flow will no longer flow through the opening A9. , the bearing A9 is thermally deformed due to the heat generated by the metal 8.

The object of the present invention is to solve this problem and provide an agitator with excellent usability and durability.

[0006]

[Means for Solving the Problems] A first means of the present invention for achieving the above object is to insert a main agitator and a sub-agitator located at the end of the main agitator together with their driving sources into a suction tool main body, This sub-agitator is equipped with flexible stirring blades formed so as to protrude from the circumferential surface of the substantially cylindrical rotor toward the outer periphery and the side surface of the suction device, and the stirring blades are formed to be inclined with respect to the rotation direction. It is.

A second method is to form the stirring blade so that the front side of the rotation is located on the side end of the floor suction tool, and the rear side of the rotation is located on the center side.

[0008]

[Operation] In the first means of the present invention, the stirring blades generate air current as the main and sub-agitators rotate to cool and suppress the temperature rise of the bearing, and in the second means,
When in use, the suction air flow rate from the sides of the floor suction device is increased to improve cleaning performance.

[0009]

Embodiments Hereinafter, embodiments will be described with reference to the accompanying drawings. In FIGS. 1 and 2, a suction device main body 21 is obtained by combining upper and lower main body members 23 and 24 via a bumper 22, and a lower opening is provided in the front interior of the suction tool main body 21.
A suction chamber 26 is formed.

At the center of this suction chamber 26 is the suction tool body 21.
A communication pipe 27 is held between the upper and lower main body members 23 and 24 so as to be able to move up and down at the rear of the main body, and a connection pipe 28 is rotatably connected to the communication pipe 27. An extension tube connected to the suction side of the machine via a hose is detachably connected.

A motor 29 and a control board 30 for controlling the motor 29 are installed on the left and right sides of the connecting pipe 28, and a power cord 3
Powered by 1.

Reference numeral 32 denotes a main agitator disposed within the suction chamber 26, which is disposed on both side walls of the suction chamber 26.
A shaft 36 is rotatably and slidably supported by bearings A34 and B35, each of which has a built-in bearing A34 and a bearing B35. The shaft 36 has bearings A34 and B35.
A secondary agitator 37 is attached to protrude further to the side, and the secondary agitator 37 faces openings A38 and B39 formed in the side wall of the suction tool body 21. A belt 42 is stretched between a pulley 40 provided on one side of the main agitator 32 and a small pulley 41 provided on the rotating shaft of the motor 29.
is forced to rotate.

The main agitator 32 includes a holder 43 and
It consists of a flexible stirring band 44 that is continuously inserted in the longitudinal spiral direction of the outer peripheral surface of this holder 43. on the other hand,
The sub-agitator 37 includes a substantially cylindrical base 45 made of a rigid material such as synthetic resin, a cap-shaped rotor 46 wrapped around the outer periphery of the base 45, and an opening A38 from the outer periphery of the rotor 46.
It consists of three stirring blades 47 that protrude and spread like a trumpet toward B39. The wall thickness of the stirring blade 47 is approximately 1.
It is a thin plate with a tip width of about 5 mm and a base width of about 9 mm, and is formed to be inclined with respect to the rotation direction so that the front side of rotation is located on the opening A38 and B39 side, and the rear side of rotation is located on the main agitator 32 side. There is. Further, the rotor 46 and the stirring blades 47 are integrally formed of a flexible material such as rubber. The base 45 is connected to the shaft 36 and transmits rotation to the rotor 46, and also maintains the shape of the flexible rotor 46. 48 is a felt for preventing dust from entering into the shaft 36 penetrating portion of the bearings A34 and B35; 49 and 50 are passages that communicate the suction chamber 26 with the openings A38 and B39; It is detachably attached to the member 23 and covers the suction chamber 26 in an openable and closable manner.

Next, the operation and effect of the above configuration will be explained. When the motor 29 is operated, the belt 42 transmits this rotation, and the main agitator 32 rotates in the upward direction, forward direction, downward direction, backward direction, and upward direction, due to the repelling action of the agitation band 44 and the suction force of the vacuum cleaner body. Removes dust from surfaces to be cleaned such as carpets and sucks the dust.

On the other hand, since the stirring blade 47 has a thin wall of about 1.5 mm in the direction of rotation, it penetrates into the roots of fibers such as carpets and scrapes up long and thin fibrous dust such as hair, which is difficult for the stirring band 44 to capture. Moreover, it works effectively for cleaning corners of a room, etc., which are located on the side of the suction tool body 21 and where the main agitator 32 is difficult to act.

By the way, when the main agitator 32 rotates, the metal 33 generates heat due to rotational sliding friction between the shaft 36 and the metal 33 that rotatably holds it, and the temperature of the bearings A34 and B35 that hold it increases. However, when I was trying to finish some other work while cleaning, I accidentally used the suction tool body 2.
1 is left upside down so that the intake air does not flow into the suction chamber 26 from the openings A38 and B39 through the passages 49 and 50, the stirring blades 47, which are formed at an angle with respect to the rotation direction, As the agitator 37 itself rotates, a cooling air flow is generated to suppress the temperature rise of the bearings A34 and B35 to below the thermal deformation temperature, thereby preventing problems with continued use.

Further, the stirring blade 47 has the opening A38 and opening B39 on the rotational front side, and the main agitator 3 on the rotational rear side.
Since the stirring blades 47 are formed to be inclined with respect to the rotation direction so as to be located on the second side, as the main and sub agitators rotate, the stirring blades 47 generate an airflow flowing from the sides to the center side of the floor suction device. , when the suction tool main body 21 is in use, the suction tool main body 21
Cleaning is achieved by increasing the flow rate of suction airflow from the sides, sucking up not only fibrous dust directly stirred up by the stirring blade 47 but also fine dust, etc., and transporting it into the vacuum cleaner body through the passages 49, 50 and the suction chamber 26. This can improve performance.

In the above embodiment, the motor 29 is used as the drive source for the main and sub agitators 32 and 37, but of course, other drive means such as an air turbine may be used instead of the motor 29.

[0019]

As described above, in the present invention, a main agitator and a sub-agitator located at the end of the main agitator are inserted into the main body of the suction tool along with their driving sources, and the sub-agitator is attached to the circumferential surface of a substantially cylindrical rotor. It is equipped with a flexible stirring blade that is formed on the outer periphery and protrudes outward from the side of the suction tool, and this stirring blade is formed to be inclined with respect to the rotation direction, thereby suppressing and cooling the temperature rise of the bearing. It is possible to prevent the occurrence of abnormal rotation of the main and sub-agitators, and by forming the inclination of the stirring blade so that the front side of rotation is located on the side end of the floor suction tool and the rear side of rotation is located on the center side,
When in use, the suction air flow rate from the side of the floor suction device is increased, the dust suction ability is increased, and the cleaning performance can be improved.

[Brief explanation of drawings]

[Fig. 1] A top view of a floor suction device according to an embodiment of the present invention with the front cover removed.

[Figure 2] Cross-sectional view of the main and sub agitators

[Figure 3] Cross-sectional view of main and sub agitators showing a conventional example

[Explanation of symbols]

21 Suction tool body 32 Main agitator 33 Metal 34 Bearing A 36 axis 37 Sub-agitator 38 Opening A 46 Rotor 47 Stirring blade

Claims (2)

[Claims] Claim 1: A main agitator and a sub-agitator located at the end of the main agitator are inserted into the main body of the suction device along with their driving sources, and the sub-agitator is arranged in a direction from the circumferential surface of the substantially cylindrical rotor and toward the outside of the side surface of the suction device. A floor suction tool for a vacuum cleaner, comprising a flexible stirring blade formed to protrude from the bottom, the stirring blade being formed at an angle of inclination with respect to the direction of rotation. 2. The floor suction tool for a vacuum cleaner according to claim 1, wherein the stirring blade is inclined such that the front side of the rotation is located at the side end of the floor suction tool, and the rear side of the rotation is located at the center.