JP3135023B2 - Drive side end plate of 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 drive side end plate of a cross flow fan.

[0002]

2. Description of the Related Art In a cross flow fan, a large number of blades are arranged at equal intervals around an axis and radially around an intermediate plate provided between a drive end plate and a shaft end plate or between them. And is attached at a predetermined angle.

[0003] Of the above members, the drive side end plate
For example, as shown in Japanese Utility Model Laid-Open Publication No. 2-110294, a boss portion which is located at the center and to which the rotating shaft of the electric motor is attached, and a ring-shaped metal plate which is located on the outer peripheral side of the boss portion and on the inner peripheral edge are provided. An elastic member that is double-molded and that is double-molded on a synthetic resin side plate having a concave portion to which the end of each blade is fixed on the outer peripheral side of one side surface, and a boss outer peripheral surface and a side plate metal plate It is composed of

The elastic member of the drive-side end plate absorbs vibration generated due to a mismatch between the rotational drive center of the electric motor and the rotational center of the cross flow fan, thereby preventing noise during rotation.

[0005]

However, in a case where the driving side end plate is formed by forming an elastic member on the outer peripheral surface of the boss portion made of a metal material, the outer peripheral surface of the boss portion and the elastic member are not formed. Since the elastic member is not completely integrated, there is a possibility that the elastic member may be peeled off from the outer peripheral surface of the boss by the rotation torque. As a result, the rotation driving force of the boss portion was transmitted to the side plate via the elastic member, and the blade could not be rotated efficiently.

This disadvantage can be solved to some extent by increasing the coefficient of friction with the elastic member by making the cross section of the boss portion in the direction perpendicular to the axis different in diameter or by knurling a large number of grooves on the outer peripheral surface. There was still a risk that the elastic member would be peeled off from the boss portion with use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and it is an object of the present invention to securely couple a boss portion and an elastic member to each other to securely provide a rotational driving force to a side plate. Another object of the present invention is to provide a drive-side end plate of a cross flow fan that can efficiently and efficiently transmit.

[0008]

For this reason, the cross flow fan of the present invention comprises a large number of blades extending in the axial direction on the outer peripheral side of the disk-shaped drive side end plate and the shaft support side end plate. In the cross flow fan mounted at equal intervals and at a predetermined angle with respect to the radial direction, the driving side end plate is formed from a flat ring shape having a concave portion on the outer peripheral side surface where the end of each blade is engaged and fixed. A metal boss having a synthetic resin side plate, a central portion, a portion to be attached to the electric motor, and a resin band on the outer peripheral surface, and a resin band outer surface of the boss portion and a side plate. The thermoplastic elastomer is injected into the inner peripheral edge of the
It is characterized by comprising at least an elastic member fused to the resin strip.

[0009]

Since the present invention is configured as described above,
When a thermoplastic elastomer is injected into the outer surface of the resin band portion of the boss portion and the inner peripheral edge of the side plate to double-mold the elastic member, the elastic member melts and fuses the resin band portion of the boss portion by the heat. And integrated. For this reason, the elastic member firmly connects the boss portion and the side plate, and can reliably and efficiently transmit the rotational torque from the boss portion to the side plate to rotate the blade.

[0010]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view schematically showing a cross flow fan.

FIG. 2 is a perspective view showing a cross flow fan constituted by providing an intermediate plate between end plates.

FIG. 3 is an exploded perspective view of the driving end plate.

FIG. 4 is a central longitudinal sectional view of the driving side end plate.

FIG. 5 is a perspective view showing another boss portion on the driving side end plate.

FIG. 6 is a perspective view showing another boss portion on the driving side end plate.

In the cross flow fan 1, a number of blades 7 are provided between the outer peripheral portions of the drive-side end plate 3 and the shaft-side end plate 5 which are substantially disk-shaped.
It is structured such that it is attached at equal intervals around the axis and at a predetermined angle to the radial direction.

In the case where the cross flow fan 1 which is elongated in the axial direction is constructed, the length of the cross flow fan 1 in the axial direction is provided between the drive side end plate 3 and the shaft support side end plate 5 as shown in FIG. A ring-shaped intermediate plate 9 having a through hole 9a at the center is provided in a number corresponding to the number of the driving-side end plate 3, the intermediate plate 9, and the shaft-side end plate 5.
A large number of blades 7 may be mounted in the above relationship between them. In this case, the mounting positions of the blades 7 between the drive-side end plate 3 and the intermediate plate 9 and between the intermediate plates 9 and between the intermediate plate 9 and the shaft-supporting end plate 5 are shifted in the direction around the axis, so that the blades 7 are in a discontinuous state. I have to.

The driving side end plate 3 is a side plate 11 located on the outer peripheral side.
And a boss 13 located at the center, and an elastic member 15 that is double-formed and connected to the outer peripheral surface of the boss 13 and the inner peripheral edge of the side plate 11.

The side plate 11 is a ring plate made of synthetic resin, and a flange 11a is integrally formed on the inner peripheral edge thereof.
Depressions 11b are formed on the outer peripheral side surface of the side plate 11 at regular intervals around the axis and at a predetermined inclination angle with respect to the radial direction. One end of each blade 7 is formed in each depression 11b. The engagement is fixed. A plurality of holes 11c are formed in the flange portion 11a at appropriate intervals around the axis. The end of the blade 7 is fixed to the concave portion 11b by engaging the end of the blade 7 in the concave portion 11b and then applying ultrasonic vibration to thermally bond the two to each other, and using an adhesive. Any of the methods may be used.

The boss 13 is made of a metal material, and has a hole 13a in the center of which a rotary shaft (not shown) of the electric motor is inserted.
Are formed. The boss portion 13 has a substantially cylindrical shape, a cross section in the direction perpendicular to the axis as shown in FIG. 5, for example, a hexagonal shape having a different diameter, and a large number of grooves 13b extending in the axial direction as shown in FIG. Any of the shapes formed as described above may be used. Reference numeral 13c in the drawing is a screw hole to which a screw (not shown) for pressing and fixing the rotating shaft of the electric motor inserted into the hole 13a is attached.

The outer peripheral surface of the boss 13 has a resin strip 1
7 is formed surrounding. The resin strip 17 is formed of the same type of synthetic resin as the side plate 11.

An elastic member 15 is provided between the outer peripheral surface of the resin strip portion 17 and the flange portion 11a of the side plate 11 so as to mutually connect. The elastic member 15 is formed between an outer peripheral surface of the resin strip 17 of the boss 13 set in a mold (not shown) and a flange 11 a of the side plate 11.
It is formed by injection of thermoplastic elastomers such as urethane, styrene and vinyl chloride.

The shaft-side end plate 5 is formed into a disk shape with the same kind of synthetic resin as the side plate 11, and a shaft 19 is inserted and fixed in a through hole 5b provided in the center boss 5a.
Also, on one side surface of the shaft-side end plate 5 facing the drive-side end plate 3, a number of recesses 5c are formed so as to coincide with the recesses 11b.

When the elastic member 15 of the driving side end plate 3 having the above structure is formed into the side plate 11 and the boss portion 13 in a double molding,
The resin strip 17 of the boss 13 is fused and integrated by the heat of the injected thermoplastic elastomer, and the flange 11a of the side plate 11 is fused while being filled in the hole 11c. As a result, the rotation torque of the electric motor applied to the boss portion 13 can be reliably and efficiently transmitted to the side plate 11 to which the blade 7 is attached, and can be rotated. As a result, it is possible to prevent the elastic member 15 from being peeled off from the outer peripheral surface of the resin band portion 17 with the passage of time, thereby making it impossible to transmit the rotational torque or reducing the transmission efficiency, and allowing the cross flow fan 1 to operate for a long time. It is possible to stably rotate and absorb vibration during rotation to prevent generation of noise.

As the intermediate plate 9 shown in FIG. 2, a side plate 11 constituting the drive side end plate 3 can be used to enable sharing of parts. In this case, the driving side end plate 3 is formed by forming recesses 11b on both sides of the outer peripheral portion of the side plate 11 at a predetermined distance from each other around the axis.
And the intermediate plate 9, the blades 7 attached to the intermediate plate 9, and the blades 7 attached to the intermediate plate 9 and the shaft end plate 5 can be shifted from each other in the rotation direction.

In the above description, the drive side end plate 3 and the pivot side end plate 5
Alternatively, a large number of blades 7 are fixed to the outer peripheral side of the intermediate plate 9 interposed therebetween by heat welding or the like, but as shown in FIG. 7, one side surface of the side plate 11 'constituting the drive side end plate 3' The blade 7 ′ may be integrally formed on the outer peripheral side, and the end of each blade 7 may be engaged and fixed to the concave portion 5 c of the pivot end plate 5.

In the above description, the flange portion 11a is formed integrally with the inner peripheral edge of the side plate 11, but as shown in FIG. A ring-shaped metal plate 33 may be double-molded on the periphery. In this case, the elastic member 15 cannot be fused to the metal plate 33 to be integrated therewith. However, an engaged portion 33a such as a hole, an uneven portion, or the like (a hole in FIG. Is formed, and the elastic member 15 is engaged with the engaged portion 33a, so that the coupling strength between the two can be increased.

[0029]

According to the present invention, the boss portion and the elastic member are firmly connected to each other so that the rotational driving force can be reliably and efficiently transmitted to the side plate.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view schematically showing a cross flow fan.

FIG. 2 is a perspective view showing a cross flow fan configured by providing an intermediate plate between end plates.

FIG. 3 is an exploded perspective view of a driving side end plate.

FIG. 4 is a central vertical sectional view of a driving side end plate.

FIG. 5 is a perspective view showing another boss portion on the drive side end plate.

FIG. 6 is a perspective view showing another boss portion on the drive side end plate.

FIG. 7 is a central longitudinal sectional view showing a modified example of the drive side end plate.

FIG. 8 is a perspective view showing a modified example of the side plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cross-flow fan 3 Drive end plate 5 Shaft end plate 7 Blade 11 Side plate 11a Flange 13 Boss 15 Elastic member 17 Resin strip

Claims (9)

(57) [Claims] 1. A large number of blades extending in the axial direction on the outer peripheral side of a disk-shaped drive-side end plate and a shaft-support-side end plate are arranged at regular intervals around an axis and at predetermined intervals in a radial direction. In the cross-flow fan mounted at an angle, the drive-side end plate is located at the center with a flat ring-shaped synthetic resin side plate having a concave portion on the outer peripheral side surface at which the end of each blade is engaged and fixed, A metal boss having a portion to be attached to the electric motor and having a resin band on the outer peripheral surface, and a thermoplastic elastomer injected into the outer surface of the resin band of the boss and the inner peripheral edge of the side plate. A drive-side end plate for a cross flow fan, comprising: an elastic member formed by double molding and fused to at least a resin band portion. 2. A flange having an engaged portion is integrally formed on an inner peripheral edge of the side plate, and an elastic member is formed by double molding on the flange and an outer surface of a resin strip of a boss. Drive side end plate of cross flow fan. 3. A flat ring-shaped metal plate having an engaged portion is double-molded on the inner peripheral edge of the side plate, and an elastic member is double-molded on the metal plate and the outer surface of the resin strip of the boss portion. The drive-side end plate of the cross flow fan according to claim 1. 4. The driving-side end plate of a cross flow fan according to claim 2, wherein the engaged portion comprises a plurality of holes. 5. The drive-side end plate of a cross flow fan according to claim 2, wherein the engaged portion comprises an uneven portion formed on an inner peripheral surface. 6. A side plate according to claim 1, wherein a plurality of recesses into which the ends of each blade are engaged are formed at regular intervals around the axis and at a predetermined inclination angle with respect to the radial direction. Drive side end plate for cross flow fan. 7. A plurality of blades are integrally formed on the outer peripheral side surface of the side plate so as to extend in the axial direction at equal intervals around the axis and at a predetermined angle with respect to the radial direction. Drive side end plate of 1 cross flow fan. 8. The driving-side end plate of a cross flow fan according to claim 1, wherein the boss portion has a cross section in a direction perpendicular to the axis having a different diameter. 9. A driving side end plate for a cross flow fan according to claim 1, wherein a number of grooves are formed on an outer peripheral surface of the boss portion so as to extend in an axial direction.