JPS6237554Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vacuum cleaner in which a motor case is arranged around the outer periphery of a motor bracket of an electric blower.

Conventionally, in order to reduce the noise generated by vacuum cleaners, there have been electric blowers in which a substantially cylindrical bottomed motor case is disposed around the exhaust side outer periphery of the motor bracket (for example, Japanese Patent Publication No. 43315/1982). Then, the opening of the motor case is press-fitted into the outer periphery of the front cushioning rubber attached to the fan case of the electric blower.
The cushioning rubber was also held in the center of the bottom of the motor case after being attached to the rear of the motor bracket. Furthermore, the front cushioning rubber and the bottom side of the motor case are held by the main body, but since the motor case bears the weight of the electric blower, vibrations are easily transmitted to the case and resonate, resulting in high noise. . In addition, some models have been designed to reduce noise even a little, such as by using case cushioning rubber to hold the motor case in the main body, but these parts and assembly costs are required, making them expensive.

The purpose of the present invention is to eliminate such conventional drawbacks and provide a vacuum cleaner that reasonably damps the vibrations generated by an electric blower and has low overall noise. A front cushioning rubber is provided on the case portion, and a rear cushioning rubber is provided at the center of the bottom of the motor bracket, and the bottomed motor case that covers the motor bracket has an opening formed at the center of the bottom with the front cushioning rubber. The hole is supported by the rear cushioning rubber penetrating through it, and the front and rear cushioning rubbers are sandwiched between the vacuum cleaner body which is divided into two parts, and furthermore, the rear cushioning rubber has a substantially step-like cross section so that the diameter decreases toward the rear. the largest diameter part of the hole is brought into contact with the inner edge of the hole of the motor case,
The medium diameter part passes through the same hole and supports the bottom of the motor case, and the small diameter part is supported by the receiving part of the vacuum cleaner body, and the substantially stepped cross section of the rear cushioning rubber supports the bottom of the motor bracket and the motor case. A gap is set between the bottom surface and the receiving part of the vacuum cleaner body.

Therefore, most of the vibrations generated in the motor section of the electric blower are absorbed by the front and rear cushioning rubber, and the slight vibrations that are not absorbed are distributed and propagated not only to the motor case but also to the main body in parallel.
Therefore, the motor case does not resonate and generate noise. In addition, the motor bracket, motor case, and receiving part of the main body are positioned with a gap between them, eliminating vibration amplification due to interference.

Examples thereof will be described below with reference to the accompanying drawings. In Figures 1 to 5, 1 is a vacuum cleaner body (hereinafter referred to as the main body), 2 is a dust collection box having an intake hole 3,
A handle 4 is arranged on the upper part. 5 is dust collection box 2
This is a built-in filter device. The dust collection box 2
is detachably attached to the main body 1 by a buckle mechanism 6 provided on the handle 4. Reference numeral 7 denotes a cord winding device built into the lower part of the main body 1, and an electric blower 9 equipped with a substantially cylindrical bottomed motor case 8 is disposed above the cord winding device, and an operation switch 10, a dust indicator 11, A main printed circuit board 12 incorporating a control circuit for controlling the input of the motor 9, etc., and a light emitting diode 13 are provided.
It has a built-in LED printed circuit board 14, etc.

The main body 1 is composed of a right main body 15 and a left main body 16, and a partition wall A20 and a partition wall B21 for forming a cord winding device chamber 17, a blower chamber 18, and a functional parts chamber 19 from the bottom are respectively formed and connected. Each of the above devices is held and fixed.

22 is an exhaust filter disposed at the rear of the blower chamber 18, 23 is a main body exhaust port, and 24 is a main body handle disposed in a concave shape in the upper part thereof.

25 is a fan case portion 9' of the electric blower 9;
26 is a rear cushioning rubber.

The motor case 8 has front and rear cushioning rubber 25, 2.
6, it covers the motor bracket 9'' portion in which the exhaust port 9'' is located. The open end of the motor case 8 is formed into a circular shape and is press-fitted onto the outer periphery of the front cushioning rubber 25, and the bottom part has a hole 8' placed in the center thereof, which is inserted into the cushioning rubber 26 after being attached to the rear part of the bracket 9 of the motor 9. I'm making it match.

The electric blower 9 is held by sandwiching the front cushioning rubber 25 and the rear cushioning rubber 26 between the right side 15 of the main body and the left side of the main body.

27 is a soundproofing material wrapped around the outer periphery of the motor bracket 9 to reduce noise, and 28 is a case bottom lining attached to the bottom of the motor case 8 for the same purpose. 8'' is a case exhaust port arranged in the motor case, and the exhaust air flows through the exhaust port 9'' of the motor bracket 9, the case exhaust port 8'', and the main body exhaust port 23 in this order.

In the rear cushioning rubber 26, the motor case 8 and the holding part and the receiving part of the main body 1 are positioned so as to have a certain gap so as not to interfere with each other. For this purpose, the outer periphery of the rear cushioning rubber 26 is formed in a substantially step-like cross section so that the diameter becomes smaller toward the rear, and its maximum diameter closes the hole 8' of the motor case 8 from its inner edge. The medium diameter portion fits into a hole 8' of the motor case 8, and the small diameter portion is supported by a receiving portion of the main body 1.

In the above configuration, the motor case 8 covers the electric blower 9 via the front and rear cushioning rubbers 25 and 26, and also holds the front and rear cushioning rubbers 25 and 26 with the right side 15 and the left side 16 of the main body, and furthermore, the right side of the main body, left 1
The holding parts 5 and 16 do not come into contact with the motor case 8.

In the rear cushioning rubber 26, the holding parts of the motor case 8 and the main body 1 are positioned so as to have a certain gap so as not to interfere with each other.
As shown in FIGS. 6 and 7, in order to assemble the holding part of the main body 1 with a gap outside the holding part of the motor case 8, a separation protrusion 26' may be formed on the rear cushioning rubber 26.

Further, the protrusion 26' has a substantially triangular cross section so that it can be easily inserted into the hole 8' of the motor case 8 and difficult to come off once inserted.

In the above configuration, the motor case 8 is located at the front;
The electric blower 9 is covered via rear cushioning rubbers 25 and 26, and the front and rear cushioning rubbers 25 and 26 are held by the right side 15 and the left side 16 of the main body, and the holding parts on the right and left 16 of the main body are connected to the motor case 8. There is no contact and no interference noise is generated. Especially at the rear of the electric blower 9, the vibrations are supported at the lowest position, and the slight vibrations are dispersed and propagated to the motor case 8 and main body 1 in parallel, without interfering with each other. Therefore, noise is significantly reduced.

In addition, there is no exhaust leakage from the opening of the motor case 8, which is the fitting part with the front buffer rubber 25, or the hole 8' part, which is the fitting part with the rear buffer rubber 26, which prevents disturbances in those parts. There is no flow, and the causes of sound generation are reduced.

Furthermore, since the sound of the motor, which is the source of sound, does not leak, a significant effect is produced in reducing noise.

Note that the open end of the motor case 8 and the hole 8'
By providing corner radii on the end face and the front and rear cushioning rubbers 25 and 26 so that they can be easily inserted, ease of insertion is improved, and the electric blower 9 and motor case 8 can be made into a unit, making it very easy to assemble. Become.

In this way, the present invention provides a front cushioning rubber on the fan case of an electric blower, and a rear cushioning rubber on the bottom center of the motor bracket.
The bottomed motor case that covers the motor bracket has its opening supported by the front cushioning rubber and the rear cushioning rubber passing through a hole formed in the center of the bottom, and the front and rear cushioning rubbers are divided into two parts. furthermore, the rear cushioning rubber is formed into a roughly step-like cross section so that its diameter decreases toward the rear, and its largest diameter part is in contact with the inner edge of the hole in the motor case, and its middle diameter part is the same. The bottom of the motor case is held through the hole, the small diameter part is supported by the receiving part of the vacuum cleaner body, and the substantially stepped cross section of the rear cushioning rubber allows the bottom of the motor bracket, the bottom of the motor case, and the vacuum cleaner body to be held in place. Since a gap is set between the rear part and the receiving part of the electric blower, the rear part, which has a large weight ratio, can be rationally supported, and as a result, the vibrations that cannot be absorbed by the rear cushioning rubber are eliminated. It is distributed and propagated to the main body in parallel without being propagated centrally to the motor case. Then,
The individual vibrations are extremely small and do not cause noise due to resonance, and there is no vibration amplification due to interference between the motor case, motor bracket, or main unit, making the vacuum cleaner quieter. It's something you get.

Furthermore, although the rear buffer rubber passes through the hole in the motor case, that part is closed by the largest diameter part of the rubber, so there is no leakage of exhaust gas, which reduces exhaust turbulence and the noise caused by it.

[Brief explanation of the drawing]

Fig. 1 is a cutaway sectional view of the main parts of a vacuum cleaner showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the cushioning rubber, Fig. 3 is a perspective view of the same, and Fig. 4 is the entire electric blower section. FIG. 5 is a sectional view of the main part of the rear part of the main body, FIG. 6 is an enlarged sectional view of the rear cushioning rubber in another embodiment, and FIG. 7 is a perspective view of the same rear cushioning rubber. 1...Vacuum cleaner body, 8...Motor case,
8'... Hole, 9... Electric blower, 9'... Fan case, 9... Motor bracket, 25... Front cushioning rubber, 26... Rear cushioning rubber.

Claims (1)

[Scope of utility model registration request] Add front cushioning rubber to the fan case of the electric blower.
A rear cushioning rubber is provided at the center of the bottom of the motor bracket, and a bottomed motor case that covers the motor bracket has an opening with the front cushioning rubber and a hole formed in the center of the bottom with a hole passing through it. The front and rear cushioning rubbers are supported by a rear cushioning rubber, and the front and rear cushioning rubbers are sandwiched between the vacuum cleaner body which is divided into two parts.Furthermore, the rear cushioning rubber is formed into a substantially step-like cross section so that the diameter decreases toward the rear. is brought into contact with the inner edge of the hole of the motor case, the central part passes through the hole and supports the bottom of the motor case, the small diameter part is supported by the receiving part of the vacuum cleaner body, and the cross section of the rear cushioning rubber is roughly stepped. A vacuum cleaner that has a gap between the bottom of the motor bracket, the bottom of the motor case, and the receiving part of the vacuum cleaner body depending on its shape.