JPH0536052B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a vibrating 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 has a front fan casing and a rear bore supported by separate vibration rubber, and the structure of the vibration isolating rubber that insulates the radial vibration of the fan casing is ,
The electric blower has a double structure: 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 body case. Due to its own weight, the anti-vibration rubber was sandwiched between the radial support ribs of the fan casing at the bottom of the fan casing, and the inner cylindrical part and the outer cylindrical part came into contact with each other, resulting in a disadvantage that the radial vibration isolation was impaired. .

[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. This recess avoids direct contact between the inner and outer cylinders at the bottom of the fan casing, and at the same time, the contact between the outer cylinders of the recess is elastic, which improves vibration isolation. can.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, an electric 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. The dust collection case 2 is detachably connected to the main body case 3 by engaging a clamp 7 attached to the upper part with a locking part 8 formed at the upper front end of the main case 3. On the other hand, a suction port 9 is formed in the front part of the dust collection case 2, and a check valve 10 is attached to the part where the suction port 9 opens into the inside of the dust collection case 2. A dust collecting device 11 having an annular gasket 10 attached to the outer periphery is removably fixed to the rear opening 4 of the dust collecting case 2 in order to filter dust.

On the other hand, the main body case 3 includes an air intake port 12 at the front.
An exhaust port 13 is formed at the rear part and a handle part 14 is formed at the upper part. There is a cord reel chamber 15 at the rear of the main body case 3, in which a cord reel 16 is stored.
A main body switch 17 is attached to the front upper part. Electric blower 18 built into the main body case 3
The front fan casing 19 and the rear bore 19a are supported by anti-vibration rubber 20 and rear anti-vibration rubber 21, respectively. The vibration isolating rubber 20 covers the front surface and outer circumference of the cylindrical fan casing 19. The support in the axial direction by the vibration isolating rubber 20 is provided by triangular ribs 20a having a triangular cross section that contact the front inner wall 23 of the main body case 3 and the front surface of the fan casing 19 in the front and rear.
Axial vibration is isolated by bending deformation. on the other hand,
Radial support is achieved by forming a double cylinder with 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 is larger in diameter and in contact with radial support ribs 23 formed on the inner side wall of the main body case 3. Forming and supporting.

Conventionally, this double cylindrical part has its center of gravity in front of the electric blower 18, so due to the electric blower's own weight, the lower part of the fan casing 19 connects with the inner cylindrical part as shown in FIGS. 2 and 3. The outer cylindrical portion was in close contact with each other, and the vibration insulation properties were not very good. Therefore, as shown in FIGS. 4 and 5, the anti-vibration rubber 20
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 of the outer cylindrical portion 20c to prevent contact between the outer cylindrical portion 20c and the inner cylindrical portion 20b. The contact was changed to elastic contact due to bending deformation of the concave portion 20d. This makes it possible to improve vibration isolation in the radial direction.

In the above configuration, the operation of the vacuum cleaner is explained. Air containing dust sucked in from the suction port 9 opens the check valve 10, is filtered by the dust collector 11, and only clean air is produced. , the air inlet 12 , and the electric blower 18 before being discharged from the exhaust port 13 . To remove the dust accumulated in the dust collection case 2, press down the clamp 7, remove the dust collection case 2 from the main body case 3, and remove the dust collection device 1 from the dust collection case 2.
Remove 1 and discard.

As described above, according to the present invention, since the concave portion 20d recessed toward the center in the radial direction is formed in the outer cylindrical portion 20c of the vibration isolating rubber 20, the weight of the electric blower 18 causes the outer cylindrical portion 20c and the inner cylindrical portion to Part 20b
On the contrary, due to the bending deformation of the recessed portion 20d, the outer cylindrical portion 20c and the inner cylindrical portion 20
It is possible to improve the vibration insulation between

In this embodiment, as shown in FIG. 5, by forming protrusions 24 on the radial support ribs 23 in accordance with the shape of the recesses 20d of the vibration isolating rubber 20 and fitting them together, Rotation between the vibration isolating rubber 20 and the main body case 3 can be prevented. On the other hand, between the vibration isolating rubber 20 and the fan casing 19,
Since the diameter of the fan casing is large, rotation can be sufficiently prevented by the frictional torque acting therebetween, and eventually rotation between the main body case 3 and the electric blower 18 can be prevented.

〔Effect of the invention〕

According to the present invention, even if the center of gravity of the electric blower is located in the front part of the main body case, the inner cylindrical part and the outer cylindrical part of the vibration isolating rubber do not come into direct contact with each other due to the recessed part, so that the vibration insulation of the electric blower is improved. In addition, since the protrusion provided on the radial support rib fits into the recess provided on the outer cylindrical portion of the vibration isolating rubber, the electric blower can prevent rotation between the main body case and the vibration isolating rubber. A vibration isolator is provided.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a vacuum cleaner, Figure 2 is a
A partial vertical sectional view of the vacuum cleaner, Figures 3 and 4, show the state of the vibration isolating rubber seen from the rear of the electric blower. Figure 3 is a rear view of the conventional example, and Figure 4 is the main FIG. 5 is a rear view showing the embodiment, and FIG. 5 is a perspective view of essential parts in the embodiment. 3...Main case, 18...Electric blower, 19
...Fan casing, 20...Vibration-proof rubber, 20
b...Inner cylindrical part, 20c...Outer cylindrical part, 20
d... recess, 22... front inner wall, 23... radial support rib.

Claims (1)

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