JPH0750588Y2 - Shaft coupling structure for blowers - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower shaft coupling structure for connecting a rotor rotation shaft of a centrifugal blower used in an air conditioner and a drive shaft of a fan motor.

[0002]

2. Description of the Related Art For example, in the case of a ceiling suspension type air conditioner, FIG.
As shown in FIG. 3, a blower A in which a plurality of centrifugal blowers 2, 2, ... Is connected in series is often used in the casing 1. In this case, a structure may be adopted in which one fan rotor 4 and three fan rotors 4, 4, 4 in series are connected to the drive shafts 3a, 3a of one double-shaft fan motor 3, respectively. But the drive shaft 3 of the fan motor 3
In order to prevent the vibration of the fan motor 3 from being transmitted to the rotor rotation shaft 5, a hollow member made of rubber or the like is provided between a and the rotor rotation shaft 5 common to the three fan rotors 4, 4, 4 in series. The shaft joint 6 is to be installed (Actual application No. 2-39).
221 and the drawings). Reference numerals 7 and 8 are air outlets, 9 is a heat exchanger, 10 is a fan housing, and 11 is a bearing that pivotally supports the end of the rotor rotation shaft 5.

[0003]

The shaft coupling structure shown in FIG. 3 is well known in the prior art.

That is, the metal inserts 12, 12,
After inserting the fan motor drive shaft 3a and the rotor rotary shaft 5 into both ends of the rubber hollow shaft joint 6 in which 12 are arranged, screw holes formed in the inserts 12, 12 respectively. By screwing set screws 14 and 14 to 13 and 13, respectively, both shafts 3a and 5 are vibration-isolated. Here, a groove 15 is formed on the outer circumference of the rotor rotary shaft 5 as a mark for determining the fitting position. However, there is a possibility that the rotor rotary shaft 5 may be fitted deeper than a predetermined position due to an error during assembly or the like. is there. Then, both shaft ends may come into contact with each other, which causes a problem that abnormal noise is generated. On the other hand, it is conceivable that the degree of fitting of the rotor rotation shaft 5 can be limited by forming the end portion of the rotor rotation shaft 5 in a stepped manner. Since the end is originally stepped, a new problem arises that it becomes difficult to remove the hollow shaft coupling 6 during maintenance.

The present invention has been made in view of the above points, and it is an object of the present invention to allow the degree of fitting of a rotor rotary shaft into a hollow shaft joint to be naturally determined when the rotor rotary shaft is assembled. Is.

[0006]

In the present invention, as means for solving the above problems, as shown in the drawings, a hollow rotor rotary shaft 5 and a drive source in a centrifugal blower 2 used in an air conditioner are used. Drive shaft 3a of the fan motor 3
In a blower shaft joint structure in which and are connected via a rubber-made hollow shaft joint 6 in a non-contact state,
A spacer 16 made of an elastic body is disposed between the rotor rotary shaft 5 and the fan motor drive shaft 3a in the hollow shaft coupling 6, and the spacer 16 drives the rotor rotary shaft 5 and the fan motor. The spacer portion 16a fills a gap between the shaft 3a and a support portion 16b that integrally projects from the spacer portion 16a and is fitted into the end portion of the rotor rotation shaft 5.

[0007]

In the present invention, the following actions can be obtained by the above means.

That is, the spacer 1 is attached to the end of the rotor shaft 5.
When the rotor rotary shaft 5 is fitted into the hollow shaft coupling 6 with the support portion 16b of No. 6 inserted, the degree of fitting of the rotor rotary shaft 5 is naturally restricted by the spacer portion 16a due to the existence of the spacer portion 16a, and Since the connection between the rotary shaft 5 and the fan motor drive shaft 3a is obtained, the rotor rotary shaft 5 can be automatically fitted and positioned and centered.

[0009]

According to the present invention, the hollow rotor rotary shaft 5 and the drive shaft 3a of the fan motor 3 which is the drive source in the centrifugal blower 2 used in the air conditioner are made of a rubber hollow shaft coupling 6 according to the present invention. In a shaft joint structure for a blower, which is connected so as to be in non-contact with each other through an elastic body, between the rotor rotary shaft 5 and the fan motor drive shaft 3a in the hollow shaft joint 6 And a spacer 16 that is
And a fan motor drive shaft 3a, and a spacer 16a that fills a gap between the fan motor drive shaft 3a and a support 16b that integrally projects from the spacer 16a and is fitted into the end of the rotor rotation shaft 5. When the end portion of the rotor rotating shaft 5 is inserted into the hollow shaft coupling 6 with the support portion 16b of the spacer 16 inserted into the end portion of the rotor rotating shaft 5, the fitting degree of the rotor rotating shaft 5 is the spacer portion 16a. The rotor rotation shaft 5 can be automatically fitted and positioned and the spacer 16 can be assembled, so that abnormal noise is generated due to the contact between the rotor rotation shaft 5 and the fan motor drive shaft 3a. In addition to the above, there is a practical effect that assembly workability is significantly improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIG.

The blower shaft joint structure of the present embodiment also has a fan motor drive shaft 3a of the centrifugal blower 2 in the ceiling suspension type air conditioner, similarly to the structure described in the above-mentioned prior art.
This is applied when the rotor and the rotor rotation shaft 5 are vibration-isolated (see FIG. 2).

Also in the shaft joint structure of this embodiment, as in the above-mentioned prior art, as shown in FIG. 1, a rubber hollow shaft joint having metal inserts 12, 12 arranged at both ends. 6, the fan motor drive shaft 3a and the rotor rotary shaft 5 are fitted from both ends, and then set screws 14 and 14 are screwed into the screw holes 13 and 13 formed in the inserts 12 and 12, respectively. By doing both shafts 3
Although a and 5 are fixed, the present embodiment is different from the prior art in that the rotor rotary shaft 5 and the drive shaft 3a are provided in the hollow shaft coupling 6 at the end of the rotor rotary shaft 5.
Spacer 16 made of an elastic body that should fill the gap between
Is provided.

The spacer 16 is a cylindrical spacer portion 16 which should fill a gap formed between the rotor rotary shaft 5 and the fan motor drive shaft 3a in the hollow shaft coupling 6.
It is an integrally molded product composed of a and a support portion 16b which is fitted and supported on the end of the rotor rotary shaft 5, and in the present embodiment, it is made of the same rubber as the hollow shaft coupling 6.
The material of the spacer 16 is not limited to that of the present embodiment, and does not generate abnormal noise by contact with the fan motor drive shaft 3a, and the vibration from the fan motor drive shaft 3a causes the rotor rotation shaft to rotate. As long as it is not transmitted to 5, it is possible to adopt an appropriate one. Further, in the case of the present embodiment, the groove for marking which is conventionally formed on the rotor rotary shaft 5 is unnecessary.

With the above construction, when the rotor rotary shaft 5 is fitted into the hollow shaft coupling 6 with the support portion 16b of the spacer 16 inserted in the end portion of the rotor rotary shaft 5, the spacer portion 16a of the spacer 16 is inserted. Due to the existence of, the degree of fitting of the rotor rotary shaft 5 is naturally restricted,
The rotor rotary shaft 5 can be automatically fitted and positioned and the spacer 16 can be assembled. Therefore, generation of abnormal noise due to contact between the rotor rotation shaft 5 and the fan motor drive shaft 3a can be prevented in advance, and the assembling workability is significantly improved.

The invention of the present application is not limited to the configuration of the above-described embodiment, and it goes without saying that the design can be appropriately changed without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a sectional view showing a shaft joint structure for a blower according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a general ceiling-mounted air conditioner.

FIG. 3 is a sectional view showing a conventional shaft coupling structure for a blower.

[Explanation of symbols]

2 is a centrifugal blower, 3 is a fan motor, 3a is a drive shaft,
4 is a fan rotor, 5 is a rotor rotating shaft, 6 is a hollow shaft coupling, 16 is a spacer, 16a is a spacer portion, and 16b is a support portion.

Claims (1)

[Scope of utility model registration request] 1. A centrifugal blower used for an air conditioner
The hollow rotor rotary shaft (5) in (2) and the drive shaft (3a) of the fan motor (3), which is the drive source, are made of a rubber hollow shaft joint.
A shaft joint for a blower, which is connected through (6) so as to be in a non-contact state, wherein the hollow shaft joint (6) is
The rotor rotating shaft (5) and the fan motor drive in
A spacer (16) made of an elastic material is provided between the shaft (3a) and the shaft (3a ).
And the spacer (16) is
Between the rotary shaft (5) and the fan motor drive shaft (3a)
Spacer portion (16a) for filling the gap and the spacer portion
(16a) integrally projecting from the rotor rotation shaft
With the support part (16b) fitted and inserted into the end part of (5)
Therefore , a shaft joint structure for a blower characterized by being configured .