JP2815841B2 - Cross flow fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross flow fan used for an air conditioner and the like, and more particularly, to a fixing member coupled to a side plate of a fan for accommodating a motor shaft, which effectively absorbs shock and vibration. The present invention relates to a cross-flow fan that is configured as much as possible and that its components are integrally molded to improve assemblability and cushioning.

[0002]

2. Description of the Related Art FIG. 4 shows an example in which a cross flow fan 20 is used by being built in a main body 10 of an air conditioner. The cross flow fan 20 includes a pair of side plates 21,
A plurality of blades 22 are arranged in the radial direction between 21a. There are at least two side plates, and when three or more side plates are used, they are arranged at equal intervals. A fixing member 23 is connected to the side plate 21a, and a driving motor 30 is connected to the fixing member 23. Although not shown, a fixing member is also connected to the side plate 21 at the other side end, and is rotatably installed on the main body 10 of the air conditioner.

As shown, a generally cylindrical cross flow fan 20 is installed inside a main body 10 in a lateral direction. Further, a suction grill 11 for sucking room air is installed on a front surface of the main body 10, and a cool air discharge port 12 is formed on a lower side of the main body 10.

Accordingly, when the cross flow fan 20 is operated, room air flows in through the intake grille 11 on the front side, and the inflowing air is cooled through an evaporator (not shown) built in the main body 10. Is discharged from the lower cool air discharge port 12.

FIG. 5 shows such a cross flow fan 2.
0, the drive motor 30 is connected to the side plate 21a of the fan 20.
2 is an exploded view of a conventional fixing member 23 for coupling to a conventional fixing member 23. The fixing member 23 is connected to the side plate 2 of the fan 20.
1a, a boss 25 which is concentric with the rim 24 and has a shaft hole 25a at the center thereof which is connected to the shaft 31 of the motor 30;
And a rubber plate 26 that absorbs shock and vibration generated in the fan 20.

After the rim 24, the boss 25 and the rubber plate 26 are integrally connected, the rim 24 is fastened to the side plate 21a by screws and assembled. In this state, the motor shaft 31
Is fitted in the shaft hole 25a of the boss 25 and then fixed with the pin 32, whereby the assembly of the cross flow fan 20 is completed. The rubber plate 26 absorbs the shock and vibration transmitted to the fan 20 or the drive motor 30.

[0007]

However, since the conventional fixing member 23 is assembled with the rubber plate 26 after the rim 24 and the boss 25 are separately manufactured, many processing steps are required. In addition, the assembling operation requires a relatively long time. In particular, since the rim 24 is made of a thin metal plate and the boss 25 is made of an aluminum material, there is a problem in that the working and assembly work is complicated. Further, since the rubber plate 26 is configured as one plate,
Although the shock and vibration in the rotational direction of the fan 20 are relatively well absorbed, there is a problem that the shock and vibration in the axial direction cannot be effectively absorbed.

FIG. 6 and FIG.
FIG. 1 illustrates another conventional fixing member 23 'disclosed in Japanese Patent Application Laid-Open Publication No. HEI 10-115139. This fixing member 23 ′ is connected to one side plate 27.
And the shaft 28 are connected by a fixing portion 29 made of a synthetic resin material.

However, after the side plate 27 and the shaft 28 are separately manufactured, the fixing member 23 '
Since a joining step is required by 9, a complicated machining operation and an assembling operation are required, which requires a relatively long time. Further, since the fixing member 23 'cannot structurally absorb the shock and vibration transmitted to the fan and the motor, the operation of the fan is not smoothly performed.
In some cases, there is a problem that driving noise is generated.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a fixing member for connecting a motor to a cross flow fan by injection molding. An object of the present invention is to provide a cross-flow fan which is easy to assemble by being manufactured as a part.

Another object of the present invention is to provide a cross-flow fan that can operate smoothly and quietly by allowing a fixing member to effectively absorb shock and vibration.

[0012]

In order to achieve the above object, a crossflow fan according to the present invention comprises a plurality of blades, an annular side plate supporting the blades, and a drive motor coupled to the side plate. A fixing member, wherein the fixing member is concentric with the rim and a rim coupled to the outer surface of the side plate,
A boss for accommodating the shaft of the drive motor, one end thereof is connected to the outer peripheral edge of the boss at equal intervals so as to connect the rim and the boss and absorb shock and vibration, and the other end is formed inside the rim. And a plurality of arms connected to the periphery.

The rim, boss and arm constituting the fixing member are preferably manufactured as a single part by injection molding a plastic material. Since the fixing member is manufactured as a single part as described above, manufacturing and assembling are facilitated, and shock absorption is improved.

Preferably, each arm extends tangentially from the outer periphery of the boss to be connected to the inner periphery of the rim.
In this way, multiple arms extend radially from the boss between the boss and rim, tangentially extending the impact and radial vibrations caused by the fan's own weight and dynamic imbalance. Can be absorbed.

Preferably, the boss is disposed at a position eccentric in the axial direction from the rim, and each arm is disposed inclined in the axial direction. As described above, since each arm is disposed inclined between the boss and the rim in the axial direction, it is possible to effectively absorb the impact and vibration in the axial direction.

[0016]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing a fixing member 50 of the cross flow fan 20 according to the present invention and a motor 30 coupled to the fixing member 50. As shown in FIG. 1, the fixing member 50 attached to the side plate 21 a of the cross flow fan 20 includes an annular rim 51 and this rim 5.
It comprises a boss 52 concentric with 1 and a plurality of arms 53 radially arranged between the rim 51 and the boss 52 and connecting the rim 51 and the boss 52.

At the center of the boss 52, a D-shaped groove 52a is formed, and the motor 30 is aligned with the groove 52a.
The cross section of the motor shaft 31 is formed in a D shape. Therefore, the motor shaft 31 of the motor 30 is fixed to the boss 52 by fitting the motor shaft 31 into the groove 52a,
The fan 20 is rotated. The rim 51 is joined to the side plate 21a of the fan 20 by heat fusion.

According to the present invention, a plurality of arms 53 for interconnecting the rim 51 and the boss 52 are radially arranged at regular intervals to reduce impacts and vibrations acting on the fan 20 and the motor 30 from all directions. Absorbs it.

Further, the fixing member 50 having such a shock absorbing and vibration absorbing property is manufactured as a single component. That is, the fixing member 50 of the present invention can be simply and easily manufactured as a single part by injection molding a plastic material having excellent cushioning properties.

FIGS. 2 and 3 show the arrangement structure of the arm 53. FIG. As shown in FIG. 2, one end of each arm 53 extends tangentially from the outer peripheral edge of the boss 52,
The inner periphery of the rim 51 is reached. According to such an arrangement, each arm 53 does not extend between the rim 51 and the boss 52 in the radial direction, but extends from the diameter D by an angle φ.

Each arm is paired with another arm symmetrically positioned with respect to the diameter of the rim 51 to facilitate absorption of shock and vibration. For example, one arm 53a is paired with another arm 53b located at a symmetric position of 180 ° with respect to the diameter D so that the fan 20
To effectively disperse or absorb radial shocks and vibrations acting on the Each arm 53
It is preferable to make the direction extending from the boss 52 to the rotation direction R of the fan so that shocks and vibrations can be effectively absorbed.

FIG. 3 is a side sectional view of the fixing member 50.
As shown in FIG. 3, the boss 52 is shifted inward in the axial direction from the rim 51, and each arm 53 is tilted in the axial direction. Therefore, the impact and vibration in the axial direction acting on the fan 20 and the motor 30 are effectively absorbed by the arms 53 arranged as described above. It is preferable that the inclination angle θ of the arm 53 in the axial direction be approximately 20 ° to 30 °. In addition, contrary to the above arrangement, the boss 52 may be shifted axially outward from the rim 51, and even in this case, the shock and vibration absorption by each arm 53 is similarly achieved. .

Reference numeral 51a denotes a projection protruding from the inner side surface of the rim 51.
The rim 51 and the side plate 21a are thermally fused to the 0 side plate 21a.

[0025]

According to the present invention thus configured,
When the motor 30 operates, the motor shaft 31 rotates at a high speed to rotate the cross flow fan 20. At this time, the vibration generated by the motor 30 is absorbed by the plurality of arms 53, so that the transmission of the vibration to the fan 20 can be prevented. On the contrary, the vibration generated by the dynamic imbalance and the rotational moment of the cross flow fan 20 is
3 to prevent transmission of vibration to the motor shaft 31. Further, external shocks are effectively absorbed by the plurality of arms 53, and the fan 20 and the motor 30 can be protected. Therefore, the crossflow fan according to the present invention can be operated smoothly and quietly with less influence of impact and vibration, and its life is extended.

Further, according to the present invention, since the fixing member 50 is manufactured as a single part by injection-molding a plastic material, manufacturing and assembling are facilitated, and productivity is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a state in which a fixing member of a cross flow fan is coupled to a motor according to the present invention.

FIG. 2 is a front view of a fixing member according to the present invention.

FIG. 3 is a side sectional view of a fixing member according to the present invention.

FIG. 4 is a perspective view of an air conditioner incorporating a cross flow fan.

FIG. 5 is an exploded perspective view showing a conventional fixing member for coupling a motor to a cross flow fan.

FIG. 6 is a perspective view showing another example of a conventional fixing member.

FIG. 7 is a side sectional view of the fixing member of FIG. 6;

[Explanation of symbols]

 Reference Signs List 20 cross flow fan 21, 21a side plate 22 blade 30 motor 31 motor shaft 50 fixing member 51 rim 52 boss 52a groove 53, 53a, 53b arm

Claims (5)

(57) [Claims] 1. A plurality of blades (22), an annular side plate (21a) supporting the blades (22), and a fixing member (50) for coupling a drive motor (30) to the side plate (21a). The fixing member (50) is concentric with the rim (51) coupled to the outer surface of the side plate (21a), and the fixing member (50) is concentric with the rim (51). ) and the boss (52) which accommodates the shaft (31) of, to absorb shock and vibration as well as connecting the said boss and the rim (51) (52), the outer peripheral edge of one end of the boss (52) A plurality of arms (5) connected at equal intervals to each other and the other end connected to the inner peripheral edge of the rim (51).
3) wherein each of the arms (53) is an outer peripheral edge of the boss (52).
Side that is tangent to the direction of rotation of the fan (R)
A cross-flow fan extending to the inner periphery of the rim (51) . Wherein said boss (52) is arranged at a position eccentric to the axial direction from the rim (51), in that the respective arm (53) is disposed inclined at a prescribed angle to said axial direction The cross flow fan according to claim 1, wherein: 3. The arm (53) is connected to the rim (5).
A pair is formed so as to be mutually symmetrical with respect to the diameter of 1).
3. The cloth according to claim 2, wherein the cloth is arranged in a manner to be arranged.
Flow fan. Wherein said rim constituting the fixing member (50) (51), the boss (52) and said arm (5
The cross flow fan according to any one of claims 1 to 3, wherein 3) is manufactured as a single component by injection molding. 5. The cross flow fan according to claim 4, wherein the fixing member is made of a plastic material.