JPH05196244A - Antivibration device for air-conditioner - Google Patents

Abstract

PURPOSE:To keep the rotating center of a motor in constant by a method wherein a projection is provided at a supporting position of a motor mounting plate to normally support the mounting plate at this projection ' while a shock load is supported at a point other than the projection whereat a spring constant is higher than usual. CONSTITUTION:When a force is applied in the axial direction of a motor, a motor mounting plate 5 pushes down the projection 7c of an antivibration rubber 7. Accordingly, the antivibration rubber 7 produces deformation toward the direction of a free space 13 within a wide range across the fulcrum 7d of deformation of rubber and the projection 7c to absorb vibration. On the other hand, when a force such as an impact force on, the like which is, larger than the usual load is applied, the antivibration rubber 7 is contacted with the motor mounting plate 5 at a second point 5b whereby the range of deformation of the rubber is narrowed to a range from the deformation fulcrum 7d of rubber to the second point 5b and the spring constant is increased. According to this method, the performance of the antivibration rubber can be developed sufficiently and the rotating center of the motor can be kept constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner embedded in a ceiling or the like, and more particularly to vibration isolation of the air conditioner.

[0002]

2. Description of the Related Art FIG. 16 is a cross-sectional view showing a vibration isolating structure of a conventional air conditioner disclosed in Japanese Patent Application No. 3-12401, where 1 is a ceiling slab of a building and 2 is a ceiling. A plate 3, an indoor unit of an air conditioner embedded in the ceiling plate 2, and an electric motor 4 are held by a motor mounting plate 5 on a fixed shaft 6 protruding from a fixed shaft mounting plate 8 via a vibration-proof rubber 7. ing. A fan 9 is fixed to the electric motor 4. FIG. 17 shows a detailed sectional view around the anti-vibration rubber. Further, FIG. 14 shows a plan view of a conventional anti-vibration rubber, and FIG. 15 shows a half sectional front view of the conventional anti-vibration rubber.

Next, the operation will be described. Although the fan 9 is rotated by the electric motor 4, deviation of the center of gravity occurs at this time due to manufacturing variations, and vibrations that are eccentric in the rotation direction of the electric motor 4 and vibrations due to magnetism due to the characteristics of the electric motor 4 are generated. An anti-vibration rubber 7 which is an elastic body is inserted between the electric motor 4 and the air conditioner body 3 so as to prevent this vibration from being transmitted to the air conditioner body 3, and the vibration of the air conditioner body 3 is measured. At this time, in order to keep the rotation center of the electric motor 4 at a fixed position, the fixed shaft 6 and the antivibration rubber 7 are in close contact with each other on the entire surface, and the mounting plate 5 of the electric motor and the antivibration rubber 7 are also in close contact. or,
When a load is applied to the mounting plate 5 of the electric motor 4, the anti-vibration rubber 7 absorbs vibration by changing the shape between the mounting plate 5 of the electric motor 4 and the stopper plate outwardly.

[0004]

Since the conventional anti-vibration structure is constructed as described above, the free space in which the anti-vibration rubber is deformed is small, and the spring constant is set low in order to absorb the vibration of the electric motor. There was a problem that I could not. In addition, since the spring constant is always the same, in order to perform vibration isolation during normal operation and vibration isolation under impact load only with this anti-vibration rubber, it is necessary to sacrifice one half or one half. There was a problem.

The present invention has been made in order to solve the above-mentioned problems, and one vibration-proof rubber has two spring constants of high and low, and a free space where the performance of the vibration-proof rubber can be sufficiently drawn out. It is an object of the present invention to obtain a vibration-proof structure that can be secured and at which the center of rotation of the electric motor can be kept constant, and to obtain this vibration-proof structure at low cost.

[0006]

According to a first aspect of the present invention, there is provided an anti-vibration device for an air conditioner comprising: a vibration-proof rubber main body; a fixed shaft that is inserted into the center of the main body and fixedly supports the main body; In an anti-vibration device for an air conditioner, which comprises a mounting plate on the side of the air conditioner that is supported in a static manner, the main body is orthogonal to the fixed shaft and includes a convex portion at a portion that supports the mounting plate. Support the mounting plate with the convex portion,
Further, with respect to the impact load, it is characterized in that it is supported at a portion where the spring constant other than the convex portion is larger than usual.

According to a second aspect of the present invention, there is provided an anti-vibration device for an air conditioner, the anti-vibration rubber body, a fixed shaft that is inserted into the center of the main body, and fixedly supports the main body, and elastically supported by the main body. In a vibration isolator of an air conditioner having an annular air conditioner side mounting plate having a circular hole whose side is open, a space is provided at a portion supporting the mounting plate between the main body and the fixed shaft. It is characterized by having.

[0008]

According to the vibration isolator of the air conditioner of the first aspect, it is possible to inexpensively obtain a vibration isolating structure having a small spring constant for normal force and a large spring constant for impact force.

Since the vibration isolator of the air conditioner of the second aspect has a free space for changing the shape of the anti-vibration rubber, the performance of the anti-vibration rubber can be sufficiently obtained while positioning the electric motor.

[0010]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. In FIG. 1, 5 is a mounting plate for an electric motor, 6 is a fixed shaft mounted on a fixed shaft mounting plate 8 serving as a unit base, and 7 is a vibration-proof rubber for not transmitting vibrations from the electric motor mounting plate 7 to the fixed shaft 6. , 7c are protrusions provided on the vibration-proof rubber 7, 10 is a stopper for holding the vibration-proof rubber 7 on the fixed shaft 6, and 13 is a free space for the vibration-proof rubber 7 to be deformed. In FIG. 3, 5a is a first force point for transmitting a normal force to the antivibration rubber 7, 5b is a second force point for transmitting the load to the antivibration rubber 7 when the load on the antivibration rubber 7 is temporarily large, and 7d is It is a rubber deformation fulcrum that the vibration damping rubber 7 is deformed when a load is applied to the vibration damping rubber 7 from the mounting plate 5 of the electric motor in the vertical direction. Reference numeral 13 is a free space for rubber deformation created by forming the anti-vibration rubber 7 into a stepped cylinder.

Next, the operation will be described. In FIG. 3, when a force acts in the axial direction of the electric motor, the electric motor mounting plate 5 pushes down the protrusion 7c of the vibration isolating rubber 7. As a result, the anti-vibration rubber 7 is deformed in the direction of the free space 13 over a wide range from the rubber deformation point fulcrum 7d to the protrusion,
Absorbs vibration. Further, when a force larger than a normal load such as an impact force is applied, the anti-vibration rubber 7 and the motor mounting plate 5 come into contact with each other at the second force point 5b, and the rubber deformation range is from the rubber deformation fulcrum 7d to the second force point 5b. And the spring constant increases as the range increases.

Example 2. Embodiment 2 of the present invention will be described below. FIG. 6 is a partially enlarged detailed view of the anti-vibration structure section, in which 4 is an electric motor, 5 is an electric motor mounting plate, 6 is a fixed shaft, and 7 is an anti-vibration rubber. FIG. 7 is a sectional view taken along the line BB of FIG. 6, in which 8 is a fixed shaft mounting plate and 10 is a free space formed between the fixed shaft 6 and the vibration isolating rubber 7. 6a
Indicates a contact portion between the vibration-proof rubber 7 and the fixed shaft 6. See also FIG.
2 is an overall sectional view showing Embodiment 2 of the present invention, and FIG. 11 is a partial plan view of the same.

Next, the operation will be described. In FIG. 7, when the electric motor 5 is started, a force that moves the electric motor mounting plate 5 vertically and horizontally acts as an exciting force. This force is transmitted to the antivibration rubber 7 to which the electric motor mounting plate 5 is assembled.
At this time, the vibration-proof rubber 7 is fixed to the air conditioner main body (not shown) via the fixed shaft 6, but the vibration force transmitted to the vibration-proof rubber is the vibration-proof rubber 7 and the fixed shaft 6. Since there is a free space 10 between them, most of the energy is used as energy for changing the shape of the anti-vibration rubber 7, and the force transmitted to the fixed shaft 6 becomes very small, and the air conditioner body (not shown) Does not vibrate.

Example 3. In the second embodiment, the fixed shaft 6
A free space was created by providing a step on the, but by providing a step on the anti-vibration rubber 7 as shown in FIG.
You may create the free space 10.

Example 4. Since most of the exciting force from the electric motor 4 is in the rotational direction of the electric motor 4, the center of the cylindrical shaft of the vibration isolating rubber 7 and the electric motor mounting plate are as shown in FIG. 9 which is a sectional view taken along the line CC of FIG. The fixed shaft 6 is arranged such that the center of the partially opened circular hole of 5 is located on the circumference closer to the electric motor 4 with the center of the cylindrical shaft of the vibration-proof rubber 7 being disposed.
The diameter of the partially opened circular hole in the motor mounting plate 5 that contacts with is larger than the diameter of the vibration isolating rubber, and the vibration isolating rubber 7 and the motor mounting plate 5 are in contact with each other at one point near the electric motor 4, and the free space (2) It is more effective to provide the deformable space of the vibration isolating rubber 7 in the rotation direction of the electric motor 4 by providing the 10a.

Embodiment 5. Further, as shown in FIG. 13, since the anti-vibration rubber 7 (shown in FIG. 12) is fixed by sandwiching both ends of the cylindrical shaft between the fixed shaft mounting plate 8 and the pressing plate 11, the main body of the air conditioner (see FIG. In order to reduce the vibration transmitted to (not shown), the contact area between the fixed shaft mounting plate 8 and the pressing plate 11 is reduced so that the vibration force of the electric motor 4 is sufficiently transmitted to the vibration damping rubber 7 and The same effect can be obtained by increasing the diameter of the portion of the antivibration rubber 7 in contact with the motor mounting plate 5 so that the shape of the rubber 7 can be sufficiently changed, and by increasing the volume of the antivibration rubber 7 as a multistage antivibration rubber. ..

[0017]

According to the vibration isolator of the air conditioner of the first aspect of the present invention, a vibration proof rubber body, a fixed shaft which is inserted into the center of the body and fixedly supports the body, and elastically supported by the body. In an anti-vibration device for an air conditioner, which comprises an air conditioner-side mounting plate, the main body is orthogonal to the fixed axis,
A portion that supports the mounting plate is provided with a convex portion, and usually the convex portion supports the mounting plate, and in a portion where the spring constant other than the convex portion is larger than usual with respect to impact load. Since it is configured to be supported, it is possible to obtain at low cost a vibration damping structure having a small spring constant for normal force and a large spring constant for impact force.

According to a second aspect of the present invention, there is provided an anti-vibration device for an air conditioner, a vibration-isolating rubber main body, a fixed shaft that is inserted into the center of the main body, and fixedly supports the main body, and elastically supported by the main body. In a vibration isolator of an air conditioner having an annular air conditioner side mounting plate having a circular hole whose side is open, a space is provided at a portion supporting the mounting plate between the main body and the fixed shaft. Since the structure is provided, the device is inexpensive and low noise can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a vibration isolator for an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view when a load is applied to the vibration isolator of the air conditioner according to the first embodiment of the present invention.

FIG. 3 is a partial vertical cross-sectional view when a load is applied to the vibration isolator of the air conditioner according to the first embodiment of the present invention.

FIG. 4 is an overall sectional view of a vibration isolator for an air conditioner according to a first embodiment of the present invention.

FIG. 5 is a bottom view of the vibration isolator for the air conditioner according to the first embodiment of the present invention.

FIG. 6 is a partial detailed view showing a vibration isolator for an air conditioner according to a second embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing a vibration isolator for an air conditioner according to a second embodiment of the present invention.

FIG. 8 is a partial cross-sectional view showing a vibration isolator for an air conditioner according to Embodiment 3 of the present invention.

FIG. 9 is a partial detailed view showing a vibration isolator for an air conditioner according to Embodiment 4 of the present invention.

FIG. 10 is an overall sectional view showing a vibration isolator for an air conditioner according to Embodiment 2 of the present invention.

FIG. 11 is a partial plan view showing a vibration isolator for an air conditioner according to a second embodiment of the present invention.

FIG. 12 is a sectional view of a vibration-proof rubber of a vibration-damping device for an air conditioner according to a fifth embodiment of the present invention.

FIG. 13 is a partial assembly cross-sectional view showing a vibration isolator for an air conditioner according to Embodiment 5 of the present invention.

FIG. 14 is a plan view of a conventional anti-vibration rubber.

FIG. 15 is a sectional view of a conventional anti-vibration rubber.

FIG. 16 is a cross-sectional view of a conventional vibration isolator for an air conditioner.

FIG. 17 is a partial cross-sectional view of a conventional vibration isolator for an air conditioner.

[Explanation of symbols]

 5 Mounting plate 6 Fixed shaft 7 Anti-vibration rubber 7c Protrusion (projection) 10 Free space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Katsutoshi Nishikawa, Katsutoshi Nishikawa, 3-18-1, Oga, Shizuoka City Mitsubishi Electric Engineering Co., Ltd., Nagoya Office, Shizuoka Branch (72) Inventor, Itaro Akiyama, 3-chome, Oka, Shizuoka No. 1 Mitsubishi Electric Engineering Co., Ltd. Nagoya Office Shizuoka Branch (72) Inventor Kaneyama Katayama 3-18-1, Oga Shizuoka City Mitsubishi Electric Engineering Co., Ltd. Nagoya Office Shizuoka Branch

Claims (2)

[Claims] 1. An air conditioner comprising a vibration-proof rubber main body, a fixed shaft that is inserted into the center of the main body and fixedly supports the main body, and an air conditioner-side mounting plate that is elastically supported by the main body. In a vibration isolator of a machine, the main body is orthogonal to the fixed shaft, and is provided with a convex portion at a portion that supports the mounting plate. Usually, the convex portion supports the mounting plate, and with respect to an impact load, An anti-vibration device for an air conditioner, characterized in that it is supported at a portion other than the convex portion where the spring constant is higher than usual. 2. An anti-vibration rubber main body, a fixed shaft which is inserted in the center of the main body and fixedly supports the main body, and an annular air which is elastically supported by the main body and has a circular hole whose outer peripheral side is open. In a vibration isolator for an air conditioner including a mounting plate on a side of a air conditioner, between the main body and the fixed shaft, a space is provided at a portion supporting the mounting plate. Anti-vibration device.