JPH10159792A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blower which is structured according to the conventional technique so that the whole fan is supported by rubber, whereby misalignment is unlikely to occur, a pneumatically adverse effect is eliminated, assembly can be made easily, and the fan is not likely to incline even at service in the horizontal attitude. SOLUTION: A blower is composed of a motor 8 to generate a torque, a shaft 4 to transmit the torque of the motor 8, a fan boss 1a equipped with a fan 1 at the periphery, a shaft fitting part which is installed at the fan boss part 1a, admits fitting of the shaft 4 rotatably, and relieves the inclination of the fan 1 caused by the weight at the time of service in the horizontal attitude, and a vibration absorbing member 4 which is installed at a recess 1b formed between the shaft 4 and fan boss 1a, transmits the torque to the fan boss 1a, and absorbs vibrations in the rotating direction which the motor 8 generates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a blower,
It is an object of the present invention to provide a blower which is less likely to be misaligned by the improvement of the vibration proof structure, does not cause the inclination of the fan due to the weight of the fan even in horizontal use, and has excellent assembling work. In addition, the following description is made about the blower of an air conditioner for convenience.

[0002]

[Prior art]

Conventional example 1. FIG. 4 is a sectional view showing a conventional blower.
As shown in the figure, the motor 8 and the fan 1 of the normal air conditioner
The shaft 4 of the motor 8 is directly fitted into the hole of the boss 1 a of the fan 1 and is fixed with the nut 5. However, in the case of controlling the speed by changing the voltage waveform of the motor as represented by phase control or the like, in order to prevent noise due to magnetic fluctuations and torque fluctuations, the motor shaft 4 and the fan 1 are connected to each other. Need to be anti-vibration.

Conventional example 2. FIG.
FIG. 6 is a sectional view showing another conventional blower disclosed in Japanese Patent No. 28295, and FIG. 6 is a partial sectional view thereof. In the figure, 1 is a fan, 1a is a fan boss, 3 is a washer, 4 is a shaft (shaft), 5 is a nut, 8 is a fan motor, 11 is a rubber cushion having a circular cross section, 12 is a metal in contact with the shaft 4 or It is a shaft fitting member of a vibration-proof rubber 11 formed of resin. The anti-vibration rubber 11 is fixed to the fan boss 1a serving as an outer ring by bonding or integral molding.

In the other conventional blower described above, the vibration due to the torque fluctuation transmitted from the fan motor 8 through the shaft 4 is absorbed by the vibration isolating rubber 11 and is difficult to be transmitted to the fan 1, so that the torque fluctuation of the fan motor 8 The generation of abnormal noise of the fan 1 due to the vibration caused by the above can be prevented.

[0005]

The conventional blower is constructed as described above, and the vibration isolating rubber 11 of the fan 1 is inserted into the entire inner periphery of the fan boss 1a, and the whole fan is supported by rubber. Therefore, misalignment is likely to occur, and the fan 1 may be inclined by the weight of the fan 1 during horizontal use, which may adversely affect aerodynamics.

Further, since the cross section of the vibration isolating rubber 11 is circular as shown in FIG. 6, the fan boss 1 serving as an outer ring is formed.
There is a problem that the bonding work of a is required, or fixing by integral molding or the like is required, and the assemblability is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a blower which is less likely to be misaligned, hardly causes the fan to tilt even when used horizontally, and which is easy to assemble. Aim.

[0008]

According to a first aspect of the present invention, there is provided a blower comprising: a motor for generating a rotating force; a shaft for transmitting the rotating force of the motor; a fan boss provided with a fan around the fan; The shaft is provided in the boss, the shaft is rotatably fitted, and the shaft is fitted in such a manner that the inclination due to the weight of the fan is reduced in horizontal use, and the recess is formed between the shaft and the fan boss. And a vibration absorbing member that transmits the rotational force to the fan boss portion and absorbs the rotational vibration generated by the electric motor.

A blower according to a second aspect of the present invention provides a blower according to the first aspect.
In the blower described above, a transmission fitting portion is provided in which the fan boss portion and the vibration absorbing member are fitted, and the transmission fitting portion has a shape that appropriately transmits the rotational force to the fan boss portion.

[0010] The blower according to the third aspect of the present invention is the blower according to the second aspect.
In the blower described above, the shape of the transmission fitting portion is a polygonal pyramid.

A blower according to a fourth aspect of the present invention provides a blower according to the second aspect.
In the above described blower, the shape of the transmission fitting portion is a gear shape.

A blower according to a fifth aspect of the present invention provides a blower according to the second aspect.
In the above described blower, the shape of the transmission fitting portion is such that it becomes thinner as it goes deeper into the transmission fitting portion.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, a blower according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a blower according to Embodiment 1 of the present invention, and FIG. 2 is a side view of the vibration-proof rubber. In the figure, reference numeral 1 denotes a fan, 1a denotes a fan boss, and a motor shaft (axis) 4 of the fan boss 1a.
A part of the hole into which is inserted is a vibration isolating rubber 2 which is a vibration absorbing member.
Has a concave portion 1b which is a transmission fitting portion for inserting the same. Recess 1
The outer periphery of “b” has a hexagonal truncated pyramid shape that becomes smaller toward the back. As shown in FIG. 2, the anti-vibration rubber 2 also has a hexagonal truncated pyramid shape similar to the concave portion 1b. However, the fitting portion between the vibration isolating rubber 2 and the concave portion 1b is not limited to the hexagonal truncated pyramid shape, and it goes without saying that another polygonal truncated pyramid shape may be used.

The other portion (shaft fitting portion) of the fan boss 1a in which the motor shaft 4 is inserted has a circular cross section, and the motor shaft 4 is rotatably inserted. 3
Is a washer, 4 is a motor shaft, 5 is a nut for fixing the fan 1 and the vibration isolating rubber 2 to the motor shaft 4, 6
Is a washer, 7 is a stopper for fixing the fan in the axial direction, 8 is a fan motor body (electric motor), 9 is a motor support, and the fan motor 8 is attached to the motor support 9 by screws 10.

As shown in FIG. 2, the portion of the shaft 4 into which the vibration isolating rubber 2 is inserted has a cross section in which a part of the outer circumference of a circle is cut off, and is transmitted to the vibration isolating rubber 2 from the shaft 4. A hole 2a having the same shape as the shaft 4 for transmitting the torque of the fan motor 8 to the fan 1 is formed.

To install the blower having the above configuration, a stopper 7 is attached to the shaft 4 of the fan motor 8, and then the washer 6, the fan 1, the vibration isolating rubber 2, and the washer 3 are inserted in this order and fixed with the nut 5. The anti-vibration rubber 2 has a hexagonal truncated pyramid shape tapered in the insertion direction, and the inclination of the concave portion 1b serves as a guide, so that it can be easily inserted.

The fan 1 is connected to a shaft 4
The vibration in the rotation direction generated by the fan motor 8 is not transmitted to the fan 1. Therefore, generation of abnormal noise of the fan 1 due to vibration in the rotation direction of the fan motor 8 can be prevented.

The anti-vibration rubber 2 of the fan 1 is attached to the fan boss 1
a is provided halfway through the hole into which the motor shaft 4 is inserted,
By leaving a portion where the fan boss portion 1a is rotatably in contact with the shaft 4, the fan is less likely to be misaligned by this portion, and the fan 1 is less likely to tilt due to the weight of the fan 1 when used horizontally.

Embodiment 2 In the first embodiment, the shape of the vibration isolating rubber 2 is a hexagonal pyramid. However, as shown in FIG. By setting the gear shape to match the outer shape of 2, the rotation direction can be more securely fixed.

In the case of a hexagonal pyramid shape as shown by an arrow in FIG. 3, the load in the rotational direction is compression, but by forming a gear, a shear load is produced as shown by an arrow in FIG. Generally, rubber is softer to shear load than to compressive load, so that a greater vibration damping effect can be obtained.

[0021]

According to the first aspect of the present invention, there is provided a blower comprising: an electric motor for generating a rotational force; a shaft for transmitting the rotational force of the electric motor;
A fan boss portion provided with a fan around the shaft, a shaft fitting portion provided on the fan boss portion, the shaft is rotatably fitted, and a tilt due to the weight of the fan is reduced when used horizontally.
It is provided in a recess formed between the shaft and the fan boss,
The structure is equipped with a vibration absorbing member that transmits the rotational force to the fan boss and absorbs the vibration in the rotating direction generated by the motor, so that misalignment hardly occurs and the fan tilts due to the weight of the fan when used horizontally. Is produced.

The blower according to the second aspect of the present invention is the blower according to the first aspect.
The blower according to claim 1, further comprising a transmission fitting portion in which the fan boss portion and the vibration absorbing member are fitted. The transmission fitting portion is configured to appropriately transmit the rotational force to the fan boss portion. Bonding becomes unnecessary.

A blower according to a third aspect of the present invention provides a blower according to the second aspect.
In the blower described above, since the shape of the transmission fitting portion is a polygonal pyramid, the fitting of the fitting portion becomes unnecessary.

A blower according to a fourth aspect of the present invention is the blower according to the second aspect.
In the blower described above, the shape of the transmission fitting portion is a gear shape, so that the rotation direction can be fixed more reliably, and the load in the rotation direction applied to the vibration absorbing member becomes a shear load, so that a greater vibration damping effect is obtained. A vibration isolator that is obtained and easy to assemble with a tapered shape in the insertion direction is obtained.

A blower according to a fifth aspect of the present invention provides a blower according to the second aspect.
In the blower described, the shape of the transmission fitting portion is made thinner as it goes deeper into the fitting portion, so that the assembly can be easily performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a blower according to Embodiment 1 of the present invention.

FIG. 2 is a side view of an anti-vibration rubber of the blower according to Embodiment 1 of the present invention.

FIG. 3 is a side view of an anti-vibration rubber of a blower according to Embodiment 2 of the present invention.

FIG. 4 is a sectional view of a conventional blower.

FIG. 5 is a sectional view of another conventional blower.

FIG. 6 is a sectional view of another conventional blower.

[Explanation of symbols]

1 fan, 1a fan boss, 2 hexagonal truncated pyramid-shaped anti-vibration rubber, 2a hole, 4 motor shaft, 8 fan motor body, 11 anti-vibration rubber.

Claims (5)

[Claims] An electric motor for generating a rotational force; a shaft for transmitting the rotational force of the electric motor; a fan boss provided with a fan therearound; and a fan boss provided on the fan boss, wherein the shaft is rotatable. And a shaft fitting portion for reducing the inclination due to the weight of the fan during horizontal use, and a concave portion formed between the shaft and the fan boss portion, and the rotational force is applied to the fan. A vibration absorbing member that transmits the vibration to the boss and absorbs the vibration in the rotation direction generated by the electric motor. 2. A transmission fitting portion in which the fan boss portion and the vibration absorbing member are fitted, wherein the transmission fitting portion has a shape for properly transmitting the rotational force to the fan boss portion. The blower according to claim 1, wherein: 3. The blower according to claim 2, wherein said transmission fitting portion has a polygonal pyramid shape. 4. The blower according to claim 2, wherein said transmission fitting portion has a gear shape. 5. The blower according to claim 2, wherein the shape of the transmission fitting portion is reduced as it goes deeper into the transmission fitting portion.