JPS6336247B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to reducing the noise of household vacuum cleaners.

Conventional configuration and its problems A conventional vacuum cleaner will be explained with reference to FIGS. 1 and 2. In the figure, 1 is a fan motor that sucks air, and is composed of a motor 7, a fan (not shown) rotated by this motor 7, and a casing 4 that covers the fan. It has an exhaust hole 3. This fan motor 1 has an outer peripheral part 5 of a casing 4 covered with a vibration-proof rubber 6, and a housing part 8 of a motor bearing.
are each elastically supported by a main body 10 by a vibration isolating rubber 9, thereby insulating the main body 10 from the fan motor 1 from vibration. The vibration isolating rubber 6 has a substantially cylindrical shape as shown in FIG. 2, and its front end 11 is connected to the main body 10
It also serves as a seal to prevent the exhaust air from the exhaust hole 3 from flowing back into the intake hole 2. Reference numeral 13 denotes a dust collecting filter made of a paper bag, which is detachably attached to the dust collecting part 14 at the front of the main body 10, and can be easily taken out by opening the front lid 15 of the main body 10. Reference numeral 16 denotes a dust collecting hose, with a floor nozzle 17 attached to one end and the other end passing through the front lid 15 and inserted into the filter 13. 18 indicates a cord reel.

Next, the dust collection effect will be explained. When the fan motor 1 is driven, air containing dust is sucked in from the floor nozzle 17. This air is supplied by a dust collection hose 16.
is sent to the inside of the filter 13, where it is separated into dust and air.The dust remains inside the filter 13, and the air is sent to the air vent 1 of the partition plate 12 of the main body 10.
9 into the intake hole 2 of the fan motor 1,
The motor 7 is cooled and exhausted from the exhaust hole 3. Air exhausted from the fan motor 1 passes through an air passage 21 inside the main body 10 as shown by an arrow 20 and is exhausted to the outside of the machine through a main body exhaust hole 22. The dust collected in this manner is accumulated inside the filter 13 one after another. When the filter 13 is full of dust, open the front lid 15 of the main body 10, take out the filter 13, throw it away, and install a new filter 13.
You can dispose of dust without getting your hands dirty. 23 indicates a filter stand for increasing dust collection efficiency.

One of the problems with the conventional vacuum cleaners mentioned above is the problem of noise. That is, fan motor 1
Vibration due to the rotational imbalance is transmitted to the main body 10, generating unpleasant noise. This fan motor 1
As for its own vibration mode, as shown in FIG. 3, the vibration component in the axial direction is large in the outer peripheral portion 5 of the casing. Such vibrations of the fan motor 1 can be reduced by softening the vibration isolating rubber 6 and the vibration isolating rubber 9. However, as shown in Figure 3,
The rotational vibration of the fan motor 1 is caused by the outer periphery of the casing 5.
is larger than the housing portion 8 of the motor bearing, so in order to reduce vibration transmission and reduce noise, it is necessary to soften the vibration isolating rubber 6 that elastically supports the casing outer peripheral portion 5. A relatively simple way to soften the vibration isolating rubber 6 is to use spongy rubber, that is, foamed rubber, but since the vibration isolating rubber 6 elastically supports the weight of the fan motor 1, If it is too soft, it will cause creep,
It does not lose its elasticity over a long period of time and loses its anti-vibration effect. It is conceivable to use a material that does not easily cause creep, such as a metal spring, but this would be difficult to use in reality because the structure would be complicated and expensive. As described above, it is difficult to soften the vibration-proof rubber of the fan motor 1 as a practical matter, and it is currently difficult to significantly reduce the unpleasant noise caused by the fan motor 1.

OBJECTS OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional vacuum cleaners mentioned above and to realize a vacuum cleaner with low noise.

Structure of the Invention The vacuum cleaner of the present invention includes a fan motor that sucks dust, a filter that collects dust, a main body containing the fan motor and the filter, and a barrier that elastically supports the front and rear of the fan motor in the main body. The vibration isolating material that supports the front side of the fan motor has an inner surface attached to the front peripheral edge and outer circumferential surface of the casing of the fan motor, and an outer surface attached to the inner side surface of the main body and the outer circumferential surface of the casing of the fan motor. It is approximately cylindrical with an L-shaped cross section that touches the partition plate, and is made of a highly flexible elastic material.Furthermore, the rear end of this front vibration isolator is made of a hard material and has a rod-shaped cross section. This ring-shaped cylinder consists of an inner ring fixed to the casing and an outer ring fixed to the inner side of the main body, and the joint surface of these rings is in the suction direction of the fan motor. It is set on a conical slope with a large diameter.

Therefore, when the vacuum cleaner is not in operation, the load of the fan motor is received by the ring-shaped disc, so that creep does not occur even if the vibration isolating material is made of a flexible elastic material. Furthermore, when the fan motor is driven during operation of the vacuum cleaner, the fan motor moves slightly in the suction direction, causing the inner and outer rings of the ring-shaped disc to move against each other in the longitudinal direction. Therefore, the load of the fan motor is received by the vibration isolating material, and a reliable vibration isolating function is achieved.

DESCRIPTION OF EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 4 to 7.

The same parts as in the conventional example are given the same numbers, and detailed explanation thereof will be omitted. In the figure, a fan motor 1 includes a casing 4 having an intake hole 2 and a motor 7 having an exhaust hole 3. A substantially cylindrical vibration damping material 31 made of sponge material or having elasticity and flexibility equivalent to sponge material is fitted onto the outer periphery 5 of the casing 4 . As shown in FIG. 7, the vibration isolating material 31 has a brim shape extending inward at one end, and as shown in FIG. The outside is in contact with the partition plate 12 of the main body 10.
It also acts as a seal between the exhaust and intake air. Further, a hard ring-shaped disk 34 is fixed to the other end of the vibration isolator 31, as shown in FIG. This ring-shaped disc 34 has a rod-shaped cross section and is composed of two members, an inner ring 35 and an outer ring 36. The inner circumferential ring 35 and the outer circumferential ring 36 each have a wedge-shaped cross section, and their respective slopes touch to form the above-mentioned rod-shaped cross section. Also,
The outer ring 36 is fixed to the inner surface of the main body 10, and the inner ring 35 is fixed to the casing 4. The outer surface 38 of the vibration isolating material 31, which has a collar portion 32 at one end and a ring-shaped disk 34 at the other end, is in full or partial contact with the inner surface of the main body 10, and supports the fan motor 1 with the casing 4. ing. Next, the vibration-proofing effect of this vibration-proofing material 31 will be described. Until the fan motor 1 is driven, as shown in FIG.
and is supported by a hard ring-shaped disk 34 fixedly provided at the other end of the vibration isolator 31. Next, when the fan motor 1 is driven, air is sucked through the intake hole 2, so the space 24 near the intake hole 2 becomes negative pressure, and the fan motor 1 is sucked toward the partition plate 12. Then, as shown in FIG. 6, the inner ring 35 of the hard ring-shaped disk 34 moves forward, creating a gap 40 between it and the outer ring 36. In this state, only the soft sponge vibration isolating material 31 supports the casing 4 of the fan motor 1, and vibrations caused by the rotation of the fan motor 1 are absorbed by the vibration isolating material 31, and transmission of vibration to the main body 10 is extremely difficult. and the noise is reduced. In addition, creep hardly occurs because the time for supporting the weight of the fan motor 1 with the sponge vibration isolating material 31 is limited to the time when the vacuum cleaner is used. A vibration-proof structure can be provided.

Effects of the invention The following effects are produced by realizing the structure described above.

It is now possible to use a sponge-like vibration isolating material with excellent vibration damping effects, and the noise caused by the rotational vibration of the fan motor can be greatly reduced.

When the vacuum cleaner is not used, the fan motor is supported by a hard ring-shaped disc, so there is no creep of the sponge vibration damping material, and stable support is possible even against shock.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional vacuum cleaner, Fig. 2 is a perspective view of the anti-vibration rubber of the vacuum cleaner, Fig. 3 is a vibration mode diagram of the fan motor of the vacuum cleaner, and Fig. 4 is the invention of the present invention. 5 is an enlarged view of the fan motor support part of the vacuum cleaner when the fan motor is not driven, and FIG. 6 is a cross-sectional view showing the vacuum cleaner of one embodiment when the fan motor is driven. FIG. 7 is an enlarged view of the fan motor support portion of the vacuum cleaner, and FIG. 1...Fan motor, 4...Casing, 13
...Filter, 10...Body, 32...Brim part,
33...Casing upper end surface, 34...Ring-shaped disc, 35...Inner circumference ring, 36...Outer circumference ring.

Claims (1)

[Claims] 1. The fan motor is equipped with a fan motor that sucks dust, a filter that collects dust, a main body that includes the fan motor and the filter, and a vibration isolator that elastically supports the front and rear parts of the fan motor on the main body. The vibration isolating material that supports the front of the fan motor has an L-shaped cross section, and its inner surface is attached to the front peripheral edge and outer peripheral surface of the casing of the fan motor, and its outer surface abuts the inner side surface of the main body and the partition plate provided on the main body. It is approximately cylindrical in shape and made of a highly flexible elastic material, and furthermore, a ring-shaped disc made of a hard material and having a rectangular cross section is provided at the rear end of the front vibration isolator.
This ring-shaped disc is composed of an inner ring fixed to the casing and an outer ring fixed to the inner side of the main body, and the joint surface of both rings is set as a conical slope with a larger diameter in the suction direction of the fan motor. Vacuum cleaner.