JP3308409B2 - Manufacturing method of rotor for floor nozzle of vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary rotor of a floor nozzle used as an attachment of a vacuum cleaner, which is rotated by a driving device.

[0002]

2. Description of the Related Art A conventional rotary rotor having an aluminum rotor has a cross-sectional shape having a plurality of blade mounting grooves, as disclosed in Japanese Patent Laid-Open No. 4-259429, and is manufactured by a torsional extrusion method. It has been proposed to press-fit a shaft into a hole of a part.

[0003]

However, in the above-mentioned method of the torsional extrusion, warpage, runout, cross-sectional shape, etc.
It was difficult to maintain the required high dimensional accuracy, the rotational balance of the rotating rotor was poor, and there was a possibility that vibration and noise were forced to occur.

[0004] In addition, if the shaft is simply press-fitted into the hole of the rotor, the strength for transmitting the torque for driving the rotating rotor is insufficient, and the shaft may come off in some cases. Was.

The present invention has been made to solve the above-mentioned disadvantages, and it is easy to maintain high dimensional accuracy and to improve driving strength.

[0006]

The material of the rotor is manufactured by extruding a metal in which one or a plurality of blade mounting grooves are provided on the outer circumference in a straight line in the longitudinal direction of the shaft. The metal to be used is aluminum and its alloys (hereinafter referred to as aluminum) in consideration of workability, economy, weight, etc.
Therefore, the following description will be made assuming that it is made of aluminum.

[0007] When the above-mentioned rotor material is cut into a length corresponding to two rotors and a torsion process is applied to both ends with a tool for twisting according to the cross-sectional shape, the end portions are maintained in an extruded shape. As a result, the groove remains straight and the inside can be twisted to make the groove spiral. This is cut at the center and processed to attach a play-side shaft to make two rotors.

A fixed end of a blade made of an elastic material is inserted into and attached to the spiral groove of the rotor. At the end where the groove is kept linear by the tool, there is a fitting part that matches the sectional shape of the rotor, and a bracket with a driven pulley and a shaft for rotating the rotating rotor is fitted. Stick. At the other end of the rotor, a play-side shaft having a fitting portion that is not eccentric is fixed by a method such as press fitting.

[0009]

The aluminum rotor material is manufactured by linear extrusion, so it is easy to achieve the required high dimensional accuracy, and the drive side end is kept extruded by a tool. Because the shape is maintained,
The dimensional accuracy of the cross section is maintained. Therefore, on the drive side,
The fitting between the bracket with the pulley and the rotor
It is possible to ensure that there is no play with each other and that the torque required for driving the rotating rotor is sufficiently transmitted. Further, since the end on the play side of the rotor only needs to support the rotor so that there is no run-out, processing can be easily performed and a simple structure can be obtained.

A floor nozzle for a vacuum cleaner having a rotating rotor as described above can be economical with little vibration and noise and easy to use.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, the schematic structure of the floor nozzle is, as shown in FIGS.
And a case divided into an upper case 3 and a lower case 1. An intake pipe 5 connected to a cleaner body (not shown) is connected to an intake port 4 provided on the near side in the case. 8 is a rotating rotor (rotor)
As shown in FIG. 1, the rotation of the motor 7 is transmitted via a transmission mechanism including the driving pulley 9, the belt 6, and the driven pulley 10.

As shown in FIG. 3, the rotary rotor 8 has four blades 12 made of an elastic material radially projecting from the outer peripheral surface of a rotor 11 made of aluminum. A bracket 14 having a driven pulley 10 and a shaft 13 is fitted to one end of the rotor 11, and a shaft 16 having a flange 15 is attached to the other end. The respective shafts 13 and 16 are provided with bearings 1 fitted in concave portions 19 and 20 provided at both ends of the lower case 1.
It is rotatably held by 7 and 18.

Reference numeral 21 shown in FIG. 4 is a material of the rotor 11, which is made by extruding aluminum. On the outer peripheral surface 22 of the rotor 11, four linear grooves 24 are provided in parallel with the rotor axis. 23 is the opening.

The extruded material 21 is used for the rotor 1
Cut into two lengths of 1. An opening 23 and a groove 24 are provided at both ends 25 and 26 of the material 21 having a length of two pieces.
In addition, a torsion tool having a shape capable of being fitted tightly without play on the outer peripheral surface of the rotor 11, that is, a gripping tool (not shown) for preventing deformation is fitted. Thereafter, the material 21 in the gripped state is subjected to a twisting process so as to obtain a predetermined twist angle.

When the torsion tool is removed, as shown in FIG. 5, both ends 25 and 26 are maintained in the extruded shape by the tool, and the opening 23 and the groove 24 are straight lines parallel to the axis. The inside except for both ends 25 and 26 is twisted to form the opening 23 and the groove 24 in a spiral shape. This is cut at the center 27 and a step 28 for attaching the shaft 16 is provided.
Is processed, two rotors 11 are formed as shown in FIG.

The spiral groove 24 of the rotor 11 is made of flexible rubber or plastic as shown in FIG.
An elongated strip-shaped blade 1 having a fixed end 29 and an open end 30
2, the fixed end 29 is inserted. Open end 3 of blade 12
0 is located at a position protruding outside the outer periphery 22 of the rotor 11.

The bracket 14 is fixed to the ends 25 and 26 of the rotor 11. As shown in FIG. 8, a portion of the bracket 14 that fits with the rotor 11 has a concave portion 31 having an inner diameter matching the outer periphery 22 of the rotor 11, and an opening 2 therein.
A rib 32 and a protruding piece 33 are provided so as to fit in the groove 3 and the groove 24 without play.

The shaft 16 is fixed to the step 28 of the rotor 11. The flange 15 of the shaft 16 has a recess 3 having an inner diameter corresponding to the outer diameter of the step 28 of the rotor 11, as shown in FIG.
4 are provided.

The rotating rotor 8 thus produced is
When rotated by the motor 7, the driving pulley 9, the belt 6, and the driven pulley 10, the open end 30 of the blade 12 comes into contact with the floor surface and rubs the floor surface, so that the dust there is jumped up, and the air intake port 4, together with air, The air is sucked by a vacuum cleaner (not shown) through the suction pipe 5, and the floor is cleaned.

[0020]

According to the present invention, it is easy to manufacture an elongated linear rotor material 21 made of aluminum by extrusion.
Even if the cross section is irregular or provided with a groove, it can be made with high accuracy.

The rotor material 21 is cut into a length corresponding to two rotors 11, and both ends 25 and 26 thereof are twisted with a tool fitted without play.
By cutting at 7, the two rotors 11 can be manufactured economically by a single twisting process.

The fitting ends 25 and 26 of the bracket 14 for transmitting the torque for driving the rotary rotor 8 are formed by a tool fitted without play so that there is no dimensional change in the cross-section due to torsion, and during extrusion molding. Dimensional accuracy is maintained, the concave portion 31 of the bracket 14 and the rib 3
2. The fitting between the protruding piece 33 and the outer periphery 22, the opening 23, and the groove 24 of the rotor 11 can be firmly fixed without play.
The accuracy and strength can be significantly improved.

Since the shaft 16 of the rotating rotor 8 does not need to transmit torque and need only be fixed while paying attention to required vibration, the recessed portion 34 provided in the flange 15 of the shaft 16 and the stepped portion 28 of the rotor 11 are machined. Can be performed easily and accurately.

The advantages of the rotary rotor according to the present invention can be summarized as follows: (a) By extruding while applying a torsional force,
Unlike rotors with reduced dimensional accuracy, rotors extruded with straight grooves have sufficiently high dimensional accuracy in cross-sectional shape. (B) When the rotor cut into a predetermined length is subjected to torsion processing, by attaching gripping tools for preventing deformation at both ends thereof, the both ends are maintained with high dimensional accuracy. (C) Brackets with rotating shafts are attached to both ends, respectively. Particularly high assembling accuracy (the degree of alignment of both shaft centers) is required because one side with a pulley for rotor rotation is provided. Brackets only. (D) Unlike a rotor whose cross-sectional shape is distorted by the torsional force at the time of extrusion molding, the deformation of both ends where the bracket is mounted is corrected, and unnecessary processing costs can be omitted. (E) Therefore, in combination with the fact that two rotors can be twisted in one step, dimensional accuracy at key points can be ensured, and a rotor with good rotational balance can be provided at lower cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of a floor nozzle accommodating a rotating rotor of the present invention, without an upper case.

FIG. 2 is a longitudinal sectional view of a floor nozzle.

FIG. 3 is a front view in which a part of the rotating rotor is sectioned;

FIG. 4 is a perspective view showing a material of a rotor.

FIG. 5 is a perspective view showing a material of the rotor after the twisting process.

FIG. 6 is a perspective view of a rotor.

FIG. 7 is a perspective view of a blade.

FIG. 8 is a perspective view of a driving side of a rotor on which a blade is mounted and a bracket fixed thereto.

FIG. 9 is a perspective view of a play side of a rotor with a blade and a shaft fixed thereto.

[Description of sign]

 Reference Signs List 1 lower case 3 upper case 7 motor 8 rotating rotor 10 driven pulley 11 rotor 12 blade 13 shaft 14 bracket 15 flange 16 shaft 21 material of rotor 22 outer periphery 23 opening 24 groove 25 end 26 end 28 step 31 recess 32 rib 33 Protrusion piece 34 recess

Claims (1)

(57) [Claims] 1. A method of manufacturing a metal rotor having a configuration in which a fixed end of a blade is inserted into a spiral groove provided on an outer peripheral surface thereof, wherein the rotor is extruded so that the groove is straight. Then, a step of cutting to a predetermined length, a step of attaching a deformation preventing gripping tool to both ends of the cut rotor and twisting, and dividing the twisted rotor into two rotors And a step of fitting a bracket having a concave-convex shape capable of being tightly fitted to an outer peripheral surface and a straight groove of the divided rotor at an end on a side where deformation is prevented, respectively. A method of manufacturing a rotor for a floor nozzle of a vacuum cleaner, comprising: