JP4132384B2 - Rotating rotor of floor nozzle for vacuum cleaner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary rotor built in a floor nozzle used as an attachment of a vacuum cleaner.
[0002]
[Prior art]
8 and 9 are, for example, a front view in section showing a rotating rotor of a conventional floor nozzle for a vacuum cleaner disclosed in Japanese Patent Application Laid-Open No. 8-511, a perspective view of a rotor before twisting, and its A It is a longitudinal cross-sectional view which follows the -A line. In the figure, reference numeral 1 denotes a rotary rotor. A rotor 2 constituting the rotary rotor 1 is made of a metal column, and a plurality of support grooves 3 opened on the outer periphery thereof are twisted in the longitudinal direction of the rotor 2 to make a spiral. The rotating body is assembled by inserting the cleaning body 4 into the support groove 3 and fitting the outer periphery of both end portions 5 of the rotor 2 with the inner periphery of the bracket 6.
[0003]
If the rotary rotor of the conventional floor nozzle for a vacuum cleaner thus configured is rotated to clean the floor surface or the like, the cleaning body rubs the floor surface, scrapes the floor surface dust, and exhibits a cleaning effect. .
[0004]
[Problems to be solved by the invention]
According to the rotary rotor of the vacuum cleaner floor nozzle configured as described above, the rotor has a metal columnar shape. In this case, for example, when six or more cleaning bodies are used, the number of supporting grooves for inserting and fixing the cleaning bodies is the same as the number of cleaning bodies, so the outer diameter of the rotor becomes large and the rotor is very confident. It has the disadvantage of becoming heavy.
[0005]
Recently, a type in which a driving body is built in the rotor has been devised. In such a case, a large rotor and a hollow rotor are inevitably required. Normally, a hollow pipe-shaped rotor with an arc connecting between adjacent support grooves having a constant thickness in the circumferential direction is structurally very strong against the force applied in the circumferential direction. It is very weak against forces applied in other directions.
[0006]
Such a rotor needs to be twisted by applying a very strong force in the circumferential direction. At this time, if the torsional force vector turns to a direction other than the circumferential direction even a little due to a subtle difference in the thickness of the rotor, a deviation in roundness, etc., the deformation easily occurs, and the cross-sectional shape before twisting is maintained. It was difficult to make the rotor spiral. Even if a rotating rotor using such a rotor is rotated, the amount of unbalance becomes very large, resulting in increased vibration and noise.
[0007]
The present invention has been made to solve the above problems, and by devising a shape of a hollow rotor that can be accurately twisted without breaking the cross-sectional shape, the rotational balance can be achieved even with a large diameter. The aim is to provide a good and light rotating rotor.
[0008]
[Means for Solving the Problems]
The present invention employs the following means to achieve the above object. That is, for a cleaner provided with a rotor in which a plurality of support grooves for inserting and fixing the cleaning body on the outer periphery are provided in the longitudinal direction and twisted around the central axis in the longitudinal direction to form the support groove in a spiral shape In the rotary rotor of the floor nozzle, the rotor is a hollow metal tubular body, and a plurality of corrugated portions are formed between the support grooves on the outer periphery.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment FIG. 1 to FIG. 6 show an embodiment. In the figure, reference numeral 20 denotes a floor nozzle, which will be described below. Reference numeral 21 denotes a main body case formed of a lower case 23 having a horizontally long opening 22 on the bottom surface and an upper case 24 covering the lower case 23. One end of the main body case communicates with the opening 22 at the center, and the other end is the main body case 21. It has a central passage 25 extending to the rear end.
[00010]
26 is an intake pipe whose one end is located in the central passage 25 and the other end is connected to the main body (not shown) of the vacuum cleaner, and 27 is a rotary rotor which includes a rotor 28, a cleaning body 29, a shaft 30 and a reduction gear 31A. The shaft 30 is rotatably supported by bearings 33 fixed to both ends in the longitudinal direction of the opening 22, and the free end 34 of the cleaning body 29 is open when the rotation is performed. More protruding.
[0011]
The rotor 28 constituting the rotary rotor 27 is a hollow tubular body extruded by aluminum or an alloy thereof. The rotor 28 is provided with a plurality of support grooves 35 for supporting the cleaning body 29, and a plurality of corrugated portions 36 are formed in an arc connecting between the adjacent support grooves 35. By providing the corrugated portion 36 in the rotor 28, the structure is very strong against a force applied to the rotor 28 in a direction other than the circumferential direction, and conversely, it is weak against a force applied in the circumferential direction. Therefore, the rotor 28 can be twisted with a relatively weak force compared to the hollow pipe-shaped rotor.
[0012]
The rotor 28 is cut to a predetermined length, a tool for twisting at both ends is attached, and a twist is applied around a central axis at a predetermined angle, so that both ends gripped by the tool remain straight and are gripped by the tool. The part other than the part is spiral. When twisting, a force is applied in the circumferential direction. Even if the force is slightly directed in the direction other than the circumferential direction, the corrugated portion 36 has a very strong structure against the force applied in the direction other than the circumferential direction as described above. Therefore, it is difficult to deform except in the circumferential direction. Therefore, the rotor 28 can be accurately twisted without breaking the cross-sectional shape.
[0013]
The cleaning body 29 is inserted and fixed in the support groove 35 of the rotor 28 thus twisted, and the brackets 32A and 32B are fixed to the straight portions at both ends of the rotor 28 to complete the rotary rotor 27. The outer diameters of the brackets 32 </ b> A and 32 </ b> B coincide with the outer diameter of the rotor 28 so that the cleaning body 29 does not come out of the support groove 35 of the rotor 28.
[0014]
Reference numeral 41 denotes a drive body made of an electric motor that rotates the rotary rotor 27, and a reduction gear 31 </ b> B is fixed to the shaft 42. Reference numeral 43 denotes a transmission belt wound around the reduction gear 31A and the reduction gear 31B.
[0015]
In the floor nozzle 20 configured in this manner, the outside air passes through the central passage 25 from the opening 22 in accordance with the operation of the cleaner body (not shown), and enters the cleaner body (not shown) via the intake pipe 26. Sucked. At this time, the drive body 41 rotates, and the rotation is transmitted to the rotary rotor 27 by the reduction gear 31A, the belt 43, and the reduction gear 31B. The cleaning body 29 mounted on the rotary rotor 27 rotates, and its free end 34 protrudes from the opening 22 and collides with the floor surface while rotating, so that dust adhering to the floor surface or scattered dust or the like directly enters the opening 22. Place dust on the outside airflow that is being scooped up or sucked.
[0016]
Since the rotary rotor 27 is based on the rotor 28 twisted with high precision as described above, the amount of unbalance when rotated is small, and even with a large diameter, the noise and vibration are very small. Become.
[0017]
In addition, although the drive body 41 for rotating the rotation rotor 27 was demonstrated with the electric motor, a fan is rotated with the attraction | suction force of the electric blower (not shown) accommodated in the cleaner body (not shown). The drive body may be formed using rotation of a traveling wheel (not shown) of the floor nozzle 20 or the like.
[0018]
Furthermore, as another embodiment, as shown in FIG. 7, there is a structure in which the rotary rotor 27 itself rotates by directly applying the air flowing from the air intake port 37 provided on the upper surface of the floor nozzle to the cleaning body 29. Since the rotary rotor 27 of the present invention is lightweight and highly accurate despite its large diameter, a larger rotational force can be obtained with the same suction force, leading to an improvement in cleaning efficiency.
[0019]
【The invention's effect】
As described above, the floor nozzle for a vacuum cleaner according to the present invention has a hollow metal tubular body and a plurality of corrugated portions formed between the support grooves on the outer periphery, so that even if the rotor has a large diameter, it is lightweight. A rotating rotor with a very good rotation balance can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an embodiment of the present invention.
2 is a perspective view with the upper case of FIG. 1 removed. FIG.
FIG. 3 is a perspective view before twisting a rotor constituting the rotary rotor of the present invention.
FIG. 4 is a cross-sectional view of a rotor constituting the rotary rotor of the present invention.
FIG. 5 is a perspective view of a rotor constituting the rotary rotor of the present invention.
FIG. 6 is a front view of the rotary rotor of the present invention.
FIG. 7 is a partial cross-sectional view of a floor nozzle showing another embodiment of the present invention.
FIG. 8 is a front view showing a cross section of a part of a conventional rotary rotor.
FIG. 9 is a perspective view of a rotor constituting a conventional rotary rotor before twisting and a longitudinal sectional view taken along the line AA.
[Explanation of symbols]
27 Rotating rotor 28 Rotor 29 Cleaning element 35 Support groove 36 Waveform portion 37 Air intake port

Claims (1)

Floor nozzle for a vacuum cleaner provided with a rotor in which a plurality of support grooves for inserting and fixing the cleaning body on the outer periphery are provided in the longitudinal direction and twisted around the central axis in the longitudinal direction to form the support groove in a spiral shape The rotary rotor of a floor nozzle for a vacuum cleaner, wherein the rotor is a hollow metal tubular body, and a plurality of corrugated portions are formed between the support grooves on the outer periphery.

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