JPH0130489B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a domestic vacuum cleaner that reduces noise.

Structure of a conventional vacuum cleaner and its problems FIGS. 1 and 2 show a conventional vacuum cleaner. In the figure, reference numeral 1 denotes a fan motor unit that generates suction force to suck in dust, etc., and is composed of a fan part 2 and a motor part 3 that drives the fan. 4 and exhausts air through an exhaust hole 5 provided in the motor section 3. The fan section 2 includes a casing 6, a fan 7 enclosed in the casing 6, and an air guide 8. The motor section 3 includes a frame 10 into which a stator 9 is press-fitted, and a rotor 17 supported by bearings 15 and 16 which are press-fitted into housing sections 13 and 14 of brackets 11 and 12, respectively.
It is composed of The fan 7 is a rotor 17
The casing 6 is press-fitted onto the outer periphery of the bracket 11.

In order to prevent unbalanced vibrations during rotation of the fan motor unit 1, the fan motor unit 1 is supported by the vacuum cleaner main body 18 in a vibration-proof manner. That is, the fan section 2 is elastically supported by a substantially cylindrical vibration-proof rubber 29 fitted to the outer periphery of the casing 6, and the motor section 3 is elastically supported by a vibration-proof rubber 19 fitted to the housing 14. The front end 20 of the vibration isolating rubber 29 is in close contact around the ventilation hole 22 of the main body partition plate 21, and serves as a seal to prevent the exhaust gas from the fan motor unit 1 from flowing back into the intake hole 4.

23 is a filter, which is a dust collection chamber 2 that collects dust.
8 and the fan motor unit 1, and serves to separate dust. 24 is a hose connected to the dust collection chamber 28, and a floor nozzle 25 is attached to the tip. 26 is a cord reel, and 27 is a main body exhaust hole.

Next, we will discuss the effect. When the fan motor unit 1 is driven, dust and air flow into the floor nozzle 25.
The dust is sucked in and guided to the dust collection chamber 28. Then, the dust is separated by the filter 23, and this dust is stored in the dust collection chamber 28.
Only air passes through the fan motor unit 1 and is exhausted from the main body exhaust hole 27. At this time,
The space in front of the intake hole 4 of the fan motor unit 1 becomes negative pressure and a suction force acts, and the fan motor unit 1 tries to move toward the main body partition plate 21. Against this movement, the vibration isolating rubber 19 fitted to the housing 14 does not act to restrict the movement of the fan motor unit 1 in the axial direction, and the vibration isolating rubber 29
Only the front end portion 20 of the front end 20 has the function of regulating this. By the way, the vacuum cleaner main body 18 has a space-saving design, so the gap between the air intake hole 4 of the fan motor unit 1 and the main body partition plate 21 is only 2 to 3 mm.
Moreover, the suction force reaches 10 kg, so in order to prevent the air intake hole 4 from coming into contact with the main body partition plate 21, vibration isolating rubber 2
It is necessary to make the front end 20 of 9 fairly hard. However, as shown in FIG. 3, the vibration of the fan motor unit 1 has a large axial component on the outer circumference of the casing 6, and this vibration cannot be sufficiently damped by the hard front end 20 of the vibration isolating rubber 29, so the vibration of the fan motor unit 1 cannot be sufficiently damped. 18 and generates unpleasant noise. A possible method for softening the front end 20 of the vibration isolating rubber 29 is to reduce the diameter of the front end 20 and receive it near the intake hole 4 to reduce the suction force.
There is a problem in that the casing 6 is weak in strength because it is made of sheet metal, and it is difficult to support the load generated in the axial direction.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, improves vibration transmission, and reduces noise.

Structure of the Invention The vacuum cleaner of the present invention includes a fan motor unit including a fan part and a motor part, a vacuum cleaner main body containing the fan motor unit, and a vacuum cleaner body that is attached to the outer periphery of the fan motor unit, The front anti-vibration rubber supports the vacuum cleaner body in the radial direction, and the fan motor unit is supported in the axial direction by being attached to the end of the fan motor unit on the motor side and having one end locked to the main body. Originally, by adopting a configuration including a rear vibration isolating rubber that restricts the axial movement of the fan motor unit with respect to the vacuum cleaner body, and a seal provided around the suction port of the fan motor unit, The suction force in the axial direction can be supported by the rear anti-vibration rubber on the motor side, which supports the part with low vibration, and there is no need to support the axial load on the outer periphery of the fan side, which has high vibration. Vibration transmission from the parts to the vacuum cleaner body is greatly improved, reducing noise.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 4 to 7. The main structure and dust collection function are the same as the conventional example, so the same parts are given the same reference numerals and a detailed explanation is omitted.The support structure and seal structure of the fan motor unit will be explained, and the vibration isolation function and The features of the effect are described below.

A ring-shaped vibration isolating rubber 31 is attached to the outer periphery of the casing 6 of the fan section 2 of the fan motor unit 1, and elastically supports the fan section 2 on the cleaner body 18 in the radial direction. Near the center of the bracket 12 on the anti-fan side of the motor section 3, a vibration isolating rubber 32 is fixed to the bracket 12 using screws 33 and a holding plate 34. The vibration-proof rubber 32 is the fifth
As is clear from FIGS. 7 to 7, an end plate 35 is provided at one end,
It has a substantially cylindrical shape with a collar portion 36 at the other end,
The center has a cylindrical recess 37 which fits into the housing part 14 of the motor part 2. Also, end plate 3
A ring-shaped groove 38 is formed between the 5 and the collar 36, and the vacuum cleaner body 18 is divided into left and right parts.
The rib 39 fits into this groove to elastically support the motor section 2 to the cleaner body 18 and to restrict movement of the fan motor unit 1 in the axial direction.
The through hole 22 of the main body partition plate 21 is made of rubber and thin.
One end of a substantially cylindrical skirt-shaped seal 40 is fitted, and the other end is tightly fitted around the intake hole 4 of the casing 6 of the fan motor unit 1 to prevent exhaust gas from the fan motor unit 1 from circulating back into the intake hole 4. I'm here. As described above, the fan motor unit 1 is elastically supported by the vacuum cleaner body 18 in the radial direction by the anti-vibration rubber 31 and the anti-vibration rubber 32, and in the axial direction by the anti-vibration rubber 3.
Only 2 is supported. That is, the seal 40 is very soft in the axial direction and does not play a supporting role, but because the diameter of the seal 40 is small, the suction force is small, and the anti-vibration rubber 32 has a simple and soft structure.
can provide axial support. Furthermore, as can be seen from FIG. 3, the vibration mode of the fan motor unit 1 is such that the casing 6 is larger than the housing 14 of the motor 2 and also oscillates, so the axial component is greater at the outer circumference of the casing 6. growing. This occurs because the amount of unbalance of the fan 7 is larger than the amount of unbalance of the rotor 17.

When the fan motor unit 1 having the vibration mode described above is supported by the vibration isolation structure according to the embodiment of the present invention described above, since there is no axial support part on the outer circumference of the casing 6, there is no vibration transmission from there.
In addition, the vibration itself transmitted from the anti-vibration rubber 32 is generally small, and since the seal 40 is provided near the suction port, the suction force generated is small, and the axial support force of the anti-vibration rubber 32 is Since the vibration can be weakened and the vibration damping effect is good, transmission from the radial direction of the vibration isolating rubber 31 is the only main vibration transmission path. However, since the radial support only needs to support a portion of the fan motor unit's own weight (1 kg or less), it is possible to design the fan motor unit to be considerably softer, and the transmission of vibration from this part is also smaller, resulting in less vibration than before. transmission can be greatly improved.

Effects of the Invention The vacuum cleaner of the present invention has the following excellent effects.

(1) Originally, it is necessary to support the axial load on the outer periphery of the fan side, where vibration is large, by supporting the suction force in the axial direction with the anti-vibration rubber on the motor side, which supports the part with low vibration. vibration transmission is greatly improved and noise can be reduced.

(2) Since the suction force is not supported by the seal part, the seal part can be installed near the intake hole of the fan part, which reduces the suction force, and supports it in the axial direction with a simple and soft vibration-proof rubber structure. As a result, the entire structure can be supported flexibly, and the vibration isolation effect can be improved.

[Brief explanation of drawings]

Figure 1 is a partial sectional view showing a conventional vacuum cleaner.
Fig. 2 is a half-cut sectional view showing a conventional fan motor unit support, Fig. 3 is an explanatory view showing the vibration mode of the fan motor unit, and Fig. 4 is a partial sectional view of a vacuum cleaner showing an embodiment of the present invention. , FIG. 5 is a half-cut sectional view showing support for the fan motor unit of the vacuum cleaner, FIG. 6 is a half-cut sectional view showing the rear support structure of the fan motor unit, and FIG. 7 is an exploded perspective view of FIG. 6. be. 1...Fan motor unit, 3...Motor section, 4...Suction port, 18...Vacuum cleaner body, 31,
32... Anti-vibration rubber, 40... Seal.

Claims (1)

[Claims] 1 A fan motor unit consisting of a fan part and a motor part, a vacuum cleaner body containing the fan motor unit, and a front part attached to the outer periphery of the fan motor unit and supporting the fan motor unit in the radial direction with respect to the vacuum cleaner body. The anti-vibration rubber is attached to the end of the fan motor unit on the motor side, and one end is latched to the main body, thereby supporting the fan motor unit in the axial direction and moving the shaft of the fan motor unit relative to the vacuum cleaner main body. What is claimed is: 1. A vacuum cleaner comprising: a rear anti-vibration rubber for restricting directional movement; and a seal provided around the suction port of the fan motor unit.