JPS6077721A - Vibration-proof apparatus of electromotive blower - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a vibration isolating rubber for an electric blower suitable for vibration isolation of an electric blower of a vacuum cleaner.

[Background of the invention]

Conventionally, an electric blower built into the main body case of a vacuum cleaner is supported by separate anti-vibration rubber for the front fan casing and the rear bore. , it has a double structure with an inner cylindrical part that contacts the outer circumference of the fan casing and an outer cylindrical part that contacts the radial support ribs provided on the inner wall of the main case, but since the center of gravity of the electric blower is at the front, the electric blower Due to the blower's own weight, the anti-vibration rubber is separated between the fan casing and the radial support ribs at the bottom of the fan casing, causing the inner cylindrical part and the outer cylindrical part to come into contact with each other, resulting in a loss of radial vibration isolation. there were.

[Purpose of the invention]

An object of the present invention is to provide a vibration isolating device for an electric blower suitable for vibration isolation.

[Summary of the invention]

A feature of the present invention is that a large number of concave portions recessed toward the radial center of the electric blower are formed at equal intervals around the entire circumference on the outer cylindrical portion of the vibration-proof rubber that supports the fan casing of the electric blower. Due to this recess, direct contact between the inner cylinder part and the outer cylinder part at the bottom of the fan casing can be avoided, and at the same time, the contact between the recess and the outer cylinder part is elastic, which can improve vibration isolation. can.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a vacuum cleaner 1 consists of a dust collection case 2 and a main body case 3. The dust collection case 2 has a substantially cylindrical shape with a bottom that opens at the rear, and a protrusion 5 protruding from the bottom of the opening 4 is aligned with a receiving part 6 formed at the bottom of the front end of the main case 3. Clamp 7 attached to the top
The passenger case 2 is detachably connected to the main body case 3 by engaging with a locking portion 8 formed at the upper front end of the main body case 3. On the other hand, on the front of the fruit case 2,
A check valve 10 is attached to a portion where a suction port 9 is formed and opens into the inside of the dust collection case 2. A dust removal device 11 having an annular gasket 10 attached to the outer periphery is removably fixed to the rear opening 4 of the dust case 2 in order to filter dust.

On the other hand, the main body case 3 is formed with an intake port 12 at the front, an exhaust port 13 at the rear, and a handle portion 14 at the top. A cord reel chamber 15 is located at the rear of the main body case 3, and a cord reel 16 is stored therein, and the main body switch 1 is located at the front upper part.
7 is installed. The electric blower 18 built into the main body case 3 has a fan casing 19 at the front and a bore 19a at the rear with anti-vibration rubber 20 and a rear anti-vibration rubber 2, respectively.
1 is supported. The vibration isolating rubber 2o covers the front surface and outer circumference of the cylindrical fan casing 19. The axial support by the anti-vibration rubber 20 is provided by the main body case 3 at the front and rear.
This is done by a triangular rib 20a having a triangular cross section that is in contact with the front inner wall 23 of the fan casing 19 and the front surface of the fan casing 19, and vibrations in the axial direction are insulated by the bending deformation of the triangular rib 20a. On the other hand, radial support is provided by an inner cylindrical portion 20b that is in contact with the outer circumference of the fan casing 19, and an outer cylindrical portion 20C that has a larger diameter and is in contact with a radial support rib 23 formed on the inner side wall of the main body case 3. It is supported by forming a heavy cylinder.

Conventionally, since the center of gravity of the electric blower 18 is located in the front of this double cylindrical portion, the electric blower's own weight causes
As shown in the figure, the inner cylindrical part and the outer cylindrical part were in close contact with each other at the lower part of the fan casing 19, and the vibration insulation properties were not very good. Therefore, as shown in FIGS. 4 and 5, a large number of arc-shaped recesses 20d recessed toward the center in the radial direction are formed at equal intervals around the entire circumference in the outer cylindrical portion 20C of the vibration isolating rubber 20. Contact between the cylindrical portion 20C and the inner cylindrical portion 20b is prevented, and the contact is changed to elastic contact due to bending deformation of the inner cylindrical portion 2ob and the recessed portion 20d. As a result, vibration insulation in the radial direction can be improved.In the above configuration, the operation of the vacuum cleaner will be explained.The air containing dust sucked in from the suction port 9 is transferred to the check valve 10. is opened, filtered by a dust collector 11, and only clean air is discharged from an exhaust port 13 through an intake port 12 and an electric blower 18.

To remove the dust accumulated in the dust case 2, press down the clamp 7, remove the dust collection case 2 from the main body case 3, remove the dust collection device 11 from the dust case 2, and throw it away.

As described above, according to the present invention, since the four parts 20d recessed toward the center in the radial direction are formed in the outer cylindrical part 20C of the vibration isolating rubber 2o, the outer cylindrical part 20C and the inner cylindrical part 20b are On the contrary, the vibration insulation between the outer cylindrical part 20c and the inner cylindrical part 20b can be improved due to the bending deformation of the four parts 20d.

In this embodiment, as shown in FIG.
0 recess 20 (in conjunction with the shape of I, the radial support rib 2
By forming protrusions 24 on 3 and fitting them together, it is possible to prevent rotation between the vibration isolating rubber 2o and the main body case 23. On the other hand, anti-vibration rubber 20 and Fangoo 2
Since the diameter of the fan casing cinder is large between the fd and the fan casing 19, the M friction torque acting between them can sufficiently prevent rotation, and as a result, rotation between the main body case 3 and the electric blower 18 can be prevented. Can be done.

[Efficacy of invention]

According to the present invention, vibration insulation of an electric blower can be improved.

[Brief explanation of drawings]

Figure 1 is a vertical sectional view of the vacuum cleaner, Figure 2 is a partial vertical sectional view of the vacuum cleaner, and Figures 3 to 4 show the state of the vibration isolating rubber seen from the rear of the electric blower. Fig. 3 is a rear view of the conventional example, Fig. 4 is a rear view of the present embodiment, and Fig. 5 is a rear view of the conventional example.
The figure is a perspective view of essential parts in this embodiment. 3... Main body case, 18... Electric blower, 19...
・Fan casing, 20... Anti-vibration rubber, 20h...
・Inner cylindrical part, 20C...Outer cylindrical part, 20d...
Recessed portion, 22 Fig. 2 Fig. 30 Fig. 4 Fig. 5 B

Claims (1)

[Claims] 1. A main body case, an electric blower built into this main body case, a cylindrical fan casing attached to the front part of this electric blower, and the front and outer circumference of this fan casing are attached in contact with each other, and at the same time the main body case is attached. and a vibration isolating rubber that is in contact with a radial support rib provided on the front inner wall and side wall of the fan casing, the vibration isolating rubber has an inner cylindrical portion that is in contact with the outer periphery of the fan casing, and an outer cylindrical portion that has a larger diameter. A double cylindrical part is formed, and the outer cylindrical part has a number of recesses recessed toward the center in the radial direction formed at equal intervals around the entire circumference, and when the outer cylindrical part and the inner cylindrical part approach each other, the bottoms of the four parts A vibration isolating device for an electric blower, characterized in that the vibration isolating device is in contact with the periphery of the inner cylindrical portion.