JPH07103192A - Multiblade fan connector of air blower - Google Patents

Abstract

PURPOSE:To provide a blower's multiblade connector that is able to assemble a double suction type multiblade fan easily without using any tool and to reduce the cost of production. CONSTITUTION:This double suction multiblade fan is featured that two holes A14 and B15 are installed in two fan bosses A4 and B9 of both first and second multiblade fans 1 and 2 in the same direction as a shaft inserting hole 15, and both counter suction sides themselves of these first and second fans 1 and 6 are joined together, and in this constitution, it is so constituted as to be assembleable by a whirl-stop fitting 21 opened with a hole into which a shaft 12 of a motor 11 is inserted by the central part where a claw A16 to be inserted into the hole A14 of the fan boss A4 of the first multiblade fan 1, and a claw B17 to be inserted into the hole B15 of the fan boss B9 at the counter suction side of the second multiblade fan 6 are installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-blade fan connecting device for a centrifugal blower.

[0002]

2. Description of the Related Art In recent years, centrifugal blowers have been widely used in a wide range such as small air conditioners and heating appliances for home use, ventilation fans, and large air handling units for buildings. In addition, they are used finely according to their blowing capacity, and the types are increasing.

Conventionally, a multi-blade fan connecting device for a centrifugal blower of this type has a structure in which the boards of a multi-blade fan having different suction blades with different blade orientations are aligned and fixed by rivets or welding. It was common to use a suction multi-blade fan. The configuration will be described below with reference to FIGS. 5 and 6.

As shown in the figure, the first multi-blade fan 101 has a large number of blades 102 arranged on the circumference, and one ends of the blades 102 are joined together by a ring-shaped reinforcing ring 103. The other end has a fan boss 104 bonded to the center thereof by a disk-shaped substrate 105. Therefore, the suction side (reinforcement ring 103 side) of the first multi-blade fan 101 is open, but the back side is closed by the substrate 105. In addition, the blade piece 10 of the first multi-blade fan 101.
Second multi-blade fan 106 with different orientations of 2
Substrate 107 of the first multi-blade fan 101
5 were put together and fixed through rivets 109 to a plurality of through holes 108 formed in the respective substrates 105 and 107.

[0005]

In the structure of such a conventional multi-blade fan connecting device for a blower, caulking work is required through the rivet 109 or welding is required. Takes time to
There was a problem of high cost.

The present invention solves the above problems and facilitates the assembly of a double-suction multi-blade fan in manufacturing, and can also be used as a single-suction fan during the assembly of a blower, which is a versatile multi-blade fan. A first object is to provide a fan connecting device. The second purpose is to reduce costs.

[0007]

In order to achieve the first object of the multi-blade fan connecting device for a blower according to the present invention, the first means is to provide a substrate provided with a boss portion to be inserted into a shaft of a motor. A first multi-blade fan, a second multi-blade fan whose blades are oriented in opposite directions to the first multi-blade fan, and a substrate side of the first multi-blade fan and the second multi-blade fan Are opposed to each other and a suction port is formed on both sides thereof, and both boss portions are provided with connection fittings that engage with each other in a non-rotational state for connection.

In order to achieve the second object, the second
In the above means, each boss portion of the first multi-blade fan and the second multi-blade fan is provided with connecting means for connecting the boss portions to each other in a non-rotating state.

[0009]

According to the present invention, the first multi-blade fan and the second multi-blade fan are connected and attached by the connecting fittings by the constitution of the above-mentioned first means.

With the structure of the second means, the boss portions provided on the first multi-blade fan and the second multi-blade fan are directly connected by the connecting means, and the first multi-blade fan and the second multi-blade fan are connected. Will be connected and attached.

[0011]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, the first multi-blade fan 1 has a large number of blades 2 arranged on the circumference, and one ends of the blades 2 are joined together by a ring-shaped reinforcing ring 3. , The other end is
The disc-shaped substrates 5 each having a fan boss A4 at the center thereof are joined together. Therefore, although the suction side (reinforcement ring 3 side) of the first multi-blade fan 1 is open,
The back side has a shape closed by the substrate 5. on the other hand,
The second multi-blade fan 6 having a different orientation from the multi-blade pieces 2 of the first multi-blade fan 1 has the multi-blade pieces 7 arranged on the circumference, and one end of the multi-blade piece 7 is arranged. Are joined together by a ring-shaped reinforcing ring 8 and the other ends are joined together by a disc-shaped substrate 10 having a fan boss B9 in the center thereof. These fan boss A4 and fan boss B9
Is provided with at least one hole A14 and hole B15 in the same direction as the insertion hole 13 of the shaft 12 of the motor 11, respectively.
The anti-suction sides of the multi-blade fan 1 and the second multi-blade fan 6 are aligned with each other, and the claw A16 inserted into the hole A14 of the fan boss A4 on the non-suction side of the first multi-blade fan 1 and the anti-suction side of the second multi-blade fan 6 A connecting fitting 19 having a hole 18 for inserting the shaft 12 of the motor 11 provided with a claw B17 for inserting into the hole B15 of the fan boss B9 on the suction side is provided. Further, the shaft 12 of the motor 11 is provided with a positioning stopper 20 for inserting the first multi-blade fan 1 and the fan boss B9 of the second multi-blade fan 6 with respect to the rotation direction of the second multi-blade fan 6 and the shaft 12. A non-rotating metal fitting 21 for fixing and is fitted into a screw 22 cut in a non-circular portion at the tip of the shaft 12, and is fixed by tightening a nut 23.

In the above structure, the first multiblade fan 1 is inserted into the shaft 12 of the motor 11 from the suction side until it comes into contact with the positioning stopper 20, and the connection fitting 19 is inserted into the first.
The fan boss A4 on the anti-suction side of the second multi-blade fan 6 is inserted into the hole A14 of the fan boss A4 on the non-suction side of the multi-blade fan 1, and then passed through the shaft 12 from the anti-suction side of the second multi-blade fan 6. The claw B17 is inserted into the hole B15 of B9 to integrally connect the first multi-blade fan 1 and the second multi-blade fan 6.

As described above, according to the multiblade fan connecting device of the blower of the first embodiment of the present invention, the first multiblade fan 1 and the second multiblade fan are connected.
By simply sandwiching the connecting fitting 19 between the multi-blade fans 6, the double suction multi-blade fan can be easily assembled without using tools.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. In addition,
The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the first multi-blade fan 51 has a large number of blade pieces 52 arranged on the circumference, and one ends of the blade pieces 52 are joined to each other by a ring-shaped reinforcing ring 53. The other ends are joined to each other by a disk-shaped substrate 55 having a fan boss C54 in the center thereof. Therefore, the suction side (reinforcement ring 53 side) of the first multi-blade fan 51 is open, but the back side is closed by the substrate 55. On the other hand, the large number of blades 5 of the first multi-blade fan 51
Second multi-blade fan 56 with a different orientation from 2
Has a large number of wing pieces 57 arranged on the circumference, one end of which is joined to each other by a ring-shaped reinforcing ring 58, and the other end has a fan boss D59 at its center. The disc-shaped substrates 60 are bonded to each other. Two or more through-holes C62 and through-holes D63 in the same direction as the insertion hole 61 of the shaft 12 of the motor 11 on the non-suction side of the fan boss C54 and the fan boss D59, and these through-holes C62 and D63. Two or more protrusions C64 and D65, which are respectively inserted into the above, are provided to constitute the connecting means. Further, the shaft 12 of the motor 11 has a first
The positioning stopper 20 at the time of inserting the multi-blade fan 51 and the second multi-blade fan 56, and the fan boss D59 of the second multi-blade fan 56 with respect to the rotation direction of the second multi-blade fan 56.
Rotation stopper metal fitting 2 for fixing the shaft 12 to the shaft 12
1 is a screw 2 cut into the non-circular portion at the tip of the shaft 12
It is fixed by fitting it in 2 and tightening the mounting nut 23.

In the above structure, the first multi-blade fan 51 is inserted into the shaft 12 of the motor 11 from the suction side until it abuts on the positioning stopper 20, and then the second multi-blade fan 56 is inserted from the non-suction side to the shaft 12. The projection D65 and the through hole D63 on the non-suction side of the fan boss D59 are fitted into the through hole C62 and the projection C64 on the non-suction side of the fan boss C54, and the first multi-blade fan 51 and the second multi-blade are installed. The fan 56 is integrally connected.

As described above, according to the multi-blade fan connecting device for the blower of the second embodiment of the present invention, the fan boss D59 is provided in the through hole C62 and the projection C64 on the side opposite to the suction side of the fan boss C54.
The double-suction multi-blade fan can be easily assembled without using a tool simply by fitting the projection D65 on the side opposite to the suction side and the through hole D63.

[0019]

As is apparent from the above embodiments, according to the present invention, since the first multi-blade fan and the second multi-blade fan are connected by the connecting fittings, the double-blade multi-blade fan is manufactured and assembled. It is possible to provide a multi-blade fan connecting device for a blower that can be used as a single suction fan while facilitating the above.

Further, since the first multi-blade fan and the second multi-blade fan are directly connected by the connecting means provided in each boss portion, the assembly is easy and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a multi-blade fan connecting device for a blower according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the multi-blade fan connecting device of the first embodiment.

FIG. 3 is an exploded perspective view of a multi-blade fan connecting device of the blower according to the second embodiment.

FIG. 4 is a sectional view of a multi-blade fan connecting device according to the second embodiment.

FIG. 5 is an exploded perspective view of a conventional multi-blade fan connecting device for a blower.

FIG. 6 is a sectional view of a multi-blade fan connecting device of the blower.

[Explanation of symbols]

 1 1st multi-blade fan 2 wing piece 4 fan boss A 5 board 6 2nd multi-blade fan 7 wing piece 9 fan boss B 10 board 11 motor 12 shaft 51 1st multi-blade fan 52 wing piece 54 fan boss C 55 board 56 Second multi-blade fan 59 Fan boss D 61 Connecting means 62 Connecting means 63 Connecting means 64 Connecting means 65 Connecting means

Claims (2)

[Claims] 1. A first multi-blade fan having a substrate provided with a boss portion to be inserted into a shaft of a motor, and a second multi-blade having a blade piece oriented in a direction opposite to that of the first multi-blade fan. In a state in which the fan and the first multi-blade fan and the second multi-blade fan face the substrate sides, and suction ports are formed on both sides,
A multi-blade fan connecting device for a blower, wherein both bosses are provided with connecting fittings that engage with each other in a non-rotating state to connect. 2. The multi-blade fan connection for a blower according to claim 1, wherein each boss portion of the first multi-blade fan and the second multi-blade fan is provided with connecting means for connecting the boss portions to each other in a non-rotating state. apparatus.