JPH0134318B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fan motor used in vacuum cleaners and the like.

Conventional structure and its problems Conventionally, in fan motors used in vacuum cleaners, etc., as shown in Figure 1, a high-speed rotating fan (not shown) is attached to one end (front part) of the motor. The fan case 2 that covers the fan case 2 has a cylindrical shape and is mainly made of iron plate.

When this fan motor is built into the main body of a vacuum cleaner or the like, the fan case 2 and the support part 3 formed at the rear of the motor 1 are supported by the main body via support rubber. Both the fan case 2 and the support part 3 are formed in a cylindrical shape, and there is a problem that the fan motor rotates on its own axis, especially when the fan motor is started or stopped, and the lead wire connecting the fan motor and the power cord breaks.

As a countermeasure to this problem, some models assembled the fan case 2 and the support rubber, and the support rubber and the main body in pressure contact with each other, but the rotational vibrations of the fan motor were transmitted to the main body, increasing noise. Ta.

In addition, as another countermeasure, there were some that adhered the fan case 2 and support rubber or the main body, but since the fan motor generates heat, the adhesive deteriorates and the adhesion is not reliable, and the assembly time is increased. I had a problem with it.

OBJECTS OF THE INVENTION The present invention provides a fan motor for a vacuum cleaner, etc., which solves the above-mentioned conventional problems, improves reliability and ease of assembly, and further reduces noise.

Structure of the Invention A fan case that covers the fan and air guide attached to one end of the motor and has a suction port at the center of the front has a polygonal outer circumferential wall, and the fan case further includes a cylinder inscribed in the outer circumferential wall. It has a shaped inner wall. Therefore, if the outer circumferential wall of the fan case is supported, rotation will inevitably be prevented, and since a space is formed between the polygonal outer circumferential wall and the cylindrical inner wall, the fan case Vibration transmission to the motor can be suppressed as much as possible.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIGS. 2 to 4, reference numeral 4 denotes a motor, and a fan 5 that rotates at high speed is attached to one end (front part) of the motor, and is fixed with a nut 6. Reference numeral 7 denotes an air guide for flowing air sucked in by the fan 5 into the motor 4, and is attached to the front part of the motor 4. The air guide 7 also serves to effectively bring out the performance of the fan 5.

8 covers the fan 5 and the air guide 7;
The fan case has a suction port 9 formed in its center, has a polygonal shape such as a quadrangle or a hexagon, and is press-fitted and fixed to the front part of the motor 4.

Reference numeral 10 denotes an air outlet formed at the other end (rear part) of the motor 4. Air sucked in from the suction port 9 passes through the interior of the motor 4 and is discharged from the outlet 10.

Note that this cools the motor 4. 11 is a lead wire for supplying power to the motor 4.

Reference numeral 12 denotes a cylindrical support part formed at the rear of the motor 4, which is used to support the vacuum cleaner body 13 via a support rubber 15 when the fan motor 14 is built into the vacuum cleaner body 13 as shown in FIG. It is something to do.

Reference numeral 16 denotes an inner wall formed in the fan case 8, which is formed into a cylindrical shape so as to be inscribed in a polygon, and is press-fitted into the front part of the motor 4 as described above. Space part 1
7 is formed by the inner wall 16 and a polygonal outer wall 18.

Further, the fan case 8 is made of a rigid and heat-resistant resin.

In the above configuration, the fan case 8 is a polygonal prism, which has significantly improved rigidity and stronger impact strength than a conventional cylinder, and allows the fan case 8 to be made of resin, and the resonance frequency of the fan case 8. The vibration also changes, and the vibration also decreases.

Furthermore, since the polygonal corner portions of the fan case 8 are formed with the space portions 17, the vibration damping effect is greater, and the reduction in vibration is significant.

Next, the configuration in which the fan motor is built into the vacuum cleaner main body 13 will be explained with reference to FIGS. 19 are combined. The vacuum cleaner main body 13 has a built-in fan motor 14 in the front part and a cord winding device 20 in the rear part, and furthermore, the rear wall of the vacuum cleaner main body 13 has a built-in fan motor 14 and a cord winding device 20 in the rear part. A main body exhaust port 21 is formed for discharging the air to the outside of the aircraft.

The fan motor 14 has a fan case 8.
and the support portion 12 are supported by the cleaner main body 13 via support rubbers 22 and 15.

As shown in FIG. 6, one corner of the fan case 8 is placed at the bottom to receive its own weight and downward impact load.

Reference numeral 23 indicates a protrusion formed on the support rubber 22, which is positioned by the cleaner body 13 and serves to prevent the support rubber 22 from rotating.

Effects of the Invention As is clear from the above embodiments, the present invention improves the rigidity of the fan case by forming it into a polygonal shape, and prevents the fan motor from rotating when starting, stopping, or due to impact, which was a conventional problem. This is to ensure that the wires are secure and eliminate breakage of lead wires, etc.

In addition, as mentioned above, the fan case is rigid,
In addition, the combination of the polygonal outer peripheral wall and the cylindrical inner wall forms a space between them, which dampens vibrations to the outer peripheral wall, reducing vibration propagation to the vacuum cleaner, etc., and reducing noise. Moreover, since the inner wall is cylindrical, the pressure loss of the airflow is small, and the air blowing efficiency can be improved accordingly.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a conventional fan motor, Figs. 2 and 3 are external perspective views of a fan motor showing an embodiment of the present invention, and Fig. 4 is a cutaway sectional view of essential parts of the same fan motor. , FIG. 5 is a cutaway sectional view of essential parts of a vacuum cleaner incorporating the fan motor, and FIG. 6 is a sectional view taken along lines A to A in FIG. 5. 4... Motor, 5... Fan, 8... Fan case, 11... Lead wire, 13... Main body of vacuum cleaner etc., 14... Fan motor.

Claims (1)

[Claims] 1. A fan case that covers a fan and an air guide attached to one end of the motor and has a suction port at the center of the front has a polygonal outer circumferential wall, and the fan case further has an outer circumferential wall. A fan motor for a vacuum cleaner, etc., which has a cylindrical inner wall inscribed in the cylindrical inner wall. 2. The front part of the fan motor is built into the main body of the vacuum cleaner, etc., so that one corner of the polygonal fan case is placed at the bottom, or the vicinity thereof, to mainly receive its own weight and impact load. A fan motor for a vacuum cleaner or the like according to claim 1.