JPH02140500A - Vibration proofing method for air blower unit - Google Patents

Abstract

PURPOSE:To simplify the fitting work of a vibration proofing member and make the support of a motor positive by making a motor cover an outer form, setting a medium form inside the outer form and fitting the vibration proofing member at the motor cover by injection molding. CONSTITUTION:In fitting vibration proofing members 12a, 12b with a fixed width at the inner peripheries of motor covers 11a, 11b divided into halves. One half, the motor cover 11a, is made an outer form, a medium form 13 with the same shape as the motor is set into the motor cover 11a, and a foaming material made of urethane and the like is injection molded through the inlet 14 of the medium form 13 so as to form a band formed vibration proofing member 12a. In this case, an interlocking recessed part 5 is formed at the motor cover 11a. A vibration proofing member 12b is formed also at the other motor cover 11b in the same way. In this method, the fitting work of the vibration proofing members 12a, 12b is simplified. In addition, in fitting the motor to an air blower unit, its support becomes positive.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for vibration-proofing a blower unit used in a vehicle air conditioner or the like that selectively introduces inside air and outside air.

(Prior Art) Conventionally, as an example of a vibration isolation structure for a blower unit, the one shown in FIG. 7 is generally known.

The vibration isolating structure shown in the figure has a rubber vibration isolating material 3 wrapped around the motor 5 of the blower 4 around half-split motor covers 2a and 2b attached to the case body 1.
By inserting the pin 6 protruding from the motor 5 into the hole provided in the case of the motor 5, the motor 5 is supported within the motor covers 2a and 2b, and the noise caused by the vibration of the motor 5 is reduced. I was doing it.

In the figure, 7 is an inside air inlet, 8 is an outside air inlet, 9 is a switching door, and numeral 2 is the rotation axis of the motor.

(Problems to be Solved by the Invention) However, in the conventional vibration isolation structure described above, the vibration isolation material must be manually wrapped around the outer periphery of the motor, resulting in an increase in the number of work steps. Further, it is necessary to provide a hole in the motor case for fitting the pin, and the load acting in the axial direction of the motor is received only by the pin, resulting in the problem that the support structure is weak. Furthermore, since the motor is supported by a pair of pins, there is a risk that the rotating shaft of the motor may swing about the pin.

Therefore, the present invention aims to solve the above-mentioned problems by filling the space between the motor and the unit case with a foam material.

(Means for Solving the Problems) A vibration isolation method of the present invention is a vibration isolation method for a blower unit that supports a blower motor by interposing a vibration isolating member in a motor cover of the blower, the method comprising: The motor cover of is used as the outer mold, and the medium mold is set inside the motor cover of this outer mold.
A vibration isolating material is attached to the motor cover by injection molding.

(Example) An embodiment of the present invention will be described below based on the drawings.

In this embodiment, as shown in FIG. 1, vibration isolating materials 12a, 1
2b is attached.

When installing such vibration isolators 12a and 12b,
As shown in FIG. 2, a half-split motor cover 11a is used as an outer mold, a middle mold 13 having the same shape as the motor 5 is used, these are set, and an injection hole 14 formed in the middle mold 13 is passed through the injection port 14 made of urethane or the like. A belt-shaped vibration isolating material 12a is adhered to the inner surface of the motor cover 11a by injection molding a foam material.

In this case, by forming the locking recess 15 in the motor cover 11a, the vibration isolating material 12a can be attached to the motor cover 11a.
It never comes off. After providing vibration isolating materials 12a and 12b on each half of the motor cover 11a and llb, cover the half and 90% of the motor cover 11a and 11b so as to sandwich the motor 5, and place the cover 5 on the unit case 1. Installed. Therefore, the vibration isolating materials 12a, 1
2b is easy to install, and the motor can be reliably supported within the cover.

In addition, the vibration isolating materials 12a and 12b are attached to the motor covers 11a and ll.
In order to securely attach the motor cover 11a to the motor cover 11a, as shown in FIG. It is possible to prevent the vibration isolating material 12a from peeling off.

Next, other embodiments will be described with reference to FIGS. 4, 5, and 6.

The embodiments shown in these figures are medium-sized motors.

The embodiment shown in FIG. 4 is a motor cover 11a.

11b is an outer mold, the motor 5 is a medium mold, the cover opening is closed with a lid 18, and foaming material is injected from the injection port 19 of the closing lid 18 by injection molding, so that the motor 5 is made into a motor cover 11a, 1 lb. The entire structure is supported through a vibration isolating material 20 inside.

The embodiment shown in FIG. 5 has motor covers 11a and llb on the outside.
A foamed raw material 20a is inserted between the motor cover 11a, llb and the motor 5, and then heated from the outside to foam the raw material. It is something to be equipped with.

In the embodiment shown in FIG. 6, the vibration isolating material 20 is formed from a spray-type foam material 21.

In these other embodiments, similarly to the above embodiments,
Since the entire motor is covered and supported by the vibration isolating material, reliable support of the motor can be obtained.

(Effects of the Invention) As explained above, according to the present invention, the middle mold is set in the outer mold made of the motor cover, and the vibration isolating material is formed by injection molding, etc. This eliminates the need for manual winding, which simplifies production.

Further, since the entire vibration isolating material can receive stress in the axial direction of the motor, and the motor is supported by the motor cover in its entire circumferential direction, it is possible to prevent problems such as tilting of the axial center of the motor.

[Brief Description of the Drawings] Figures 1 to 3 show a motor cover to which the present invention is applied, Figure 1 is an exploded perspective view of the motor cover, and Figure 2 is a sectional view when the outer mold and the middle mold are set. , Figure 3 is a sectional view of the main part,
4 and 5 are cross-sectional views showing covers and motors according to other embodiments, FIG. 7 and FIG. 8 are cross-sectional views of conventional blower units, and FIG. 8 is a cross-sectional view of main parts. be. 5...Motor 11a. 12a. 11b...Motor cover 12b. 20... Vibration isolating material

Claims (1)

[Scope of Claims] A vibration isolation method for a blower unit in which a vibration isolating member is interposed within the motor cover of the blower to support the motor of the blower, the motor cover of the blower being an outer mold, and a motor cover of the outer mold. A vibration isolating method for a blower unit, characterized in that a medium-sized member is set inside the motor cover, and a vibration isolator is attached to the motor cover by injection molding.