JP2017194109A - Vibration absorption structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration absorption structure which can absorb vibration or impact not only in the operation of a vibration generating part but also in the transportation thereof.SOLUTION: A vibration absorption structure 1 includes a support leg part 3 supporting a vibration generating part, and a vibration absorption rubber 4 receiving the support leg part 3. Either one of faces of the support leg part 3 and vibration absorption rubber 4 facing to each other has a step in a direction to which a load from the vibration generating part is applied.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration-proof structure. More specifically, the present invention relates to a vibration isolating structure that prevents vibration of a device (hereinafter, also referred to as “vibration generating unit”) that generates vibration such as a compressor used in an air conditioner.

  A vibration generator such as a compressor or a fan motor used in an air conditioner generates vibration and noise due to the vibration during operation. If such vibration and noise increase, the living environment will be damaged and the neighboring living environment will be damaged. Therefore, the vibration generating part usually employs a vibration-proof structure that prevents or suppresses the generation of vibration. Conventionally, those of various types or structures have been proposed as such an anti-vibration structure (see, for example, Patent Documents 1 and 2).

Japanese Utility Model Publication No. 61-19686 JP 2009-162120 A

  By the way, the anti-vibration rubber constituting the anti-vibration structure includes not only vertical vibration (vibration with high frequency and minute amplitude) during operation of the vibration generating unit such as a compressor, but also vertical vibration during transportation of the vibration generating unit. Stress is applied due to vibration (large amplitude vibration of low frequency) and drop impact (large displacement) when the descent of the lift is stopped during transportation, for example, using a forklift.

  For this reason, the anti-vibration rubber is required to have a vibration damping function by the vibration generating part and a holding function against vibration and impact during transportation (function to hold the vibration generating part in a predetermined position). An anti-vibration structure that can satisfy the function has not been proposed. If the anti-vibration rubber made of a soft soft rubber is used to satisfy the former damping function, the strength is reduced, and the latter holding function cannot be sufficiently satisfied. Further, for example, in order to avoid contact between the compressor and the bottom frame of the outdoor unit that houses the abutting compressor due to a drop impact, it is conceivable to increase the height of the anti-vibration rubber. There is a problem in that the strength against vibrations is reduced.

  This invention is made in view of such a situation, and it aims at providing the vibration proof structure which can absorb the vibration and impact at the time of the transportation not only at the time of a driving | operation of a vibration generation part. Yes.

The vibration-proof structure of the present invention is
(1) A vibration isolating structure comprising a support leg for supporting the vibration generating part and a vibration isolating rubber for receiving the support leg,
There is a step in the direction in which the load of the vibration generating portion is applied to either one of the opposing surfaces of the support leg and the anti-vibration rubber.

In the vibration isolating structure of the present invention, there is a step in the direction in which the load of the vibration generating portion is applied on either one of the support leg portion and the anti-vibration rubber surface facing each other. For this reason, for example, when a step is formed on the support leg, during the normal operation of the vibration generating unit, the lower surface of the step comes into contact with the anti-vibration rubber and absorbs the vibration generated by the vibration generating unit. For vibrations with a large amplitude such as vibration during transportation of the vibration generating part and large displacement during a drop impact, the lower surface of the supporting leg part facing the vibration isolating rubber is not limited to the stepped part. By abutting against the vibration rubber, the function of absorbing the vibration and impact and holding the vibration generating portion at a predetermined position can be exhibited.
That is, in the vibration isolating structure of the present invention, when a large stress occurs such as vibration or impact during transportation, the entire surface of the anti-vibration rubber (the surface facing the support leg) is brought into contact with the support leg, By reducing the load per unit area acting on the surface, the anti-vibration rubber exhibits the function of holding the vibration generating portion.

(2) In the vibration isolating structure according to (1), the vibration isolating rubber includes a soft rubber that absorbs vibration of the vibration generating unit during operation of the vibration generating unit, and an impact generation that includes the transportation of the vibration generating unit. It is sometimes desirable to be composed of hard rubber that abuts the support leg. In this case, during normal operation of the vibration generating unit, a soft rubber that is effective in absorbing vibration with a minute amplitude is brought into contact with the support leg, and when an impact is generated including when the vibration generating unit is transported, only the soft rubber is used. In addition, the hard rubber having excellent strength can be brought into contact with the support leg, and the vibration damping function by the vibration generating part and the holding function against vibration and shock during transportation can be more effectively exhibited. .

(3) In the anti-vibration structure according to (1) or (2), the support leg portion has a convex portion constituting the step on a surface facing the anti-vibration rubber, and a lower surface of the convex portion. Can be in contact with the anti-vibration rubber. In this case, during normal operation of the vibration generating unit, the vibration generated by the vibration generating unit is attenuated at the portion of the anti-vibration rubber that is in contact with the lower surface of the convex portion of the support leg, and the impact including when the vibration generating unit is transported. At the time of occurrence, the vibration generating portion can be held by bringing substantially the entire surface of the anti-vibration rubber facing the support leg portion into contact with the lower surface of the support leg portion.

(4) In the anti-vibration structure according to (1) or (2), the anti-vibration rubber has a protruding portion constituting the step on a surface facing the support leg portion, and an upper surface of the protruding portion. Can be in contact with the support leg. In this case, during normal operation of the vibration generating unit, the vibration generated by the vibration generating unit is attenuated by contact between the upper surface of the protruding portion of the vibration-proof rubber and the support leg, and when an impact is generated including when the vibration generating unit is transported, The vibration generating portion can be held by bringing substantially the entire surface of the anti-vibration rubber facing the support leg portion into contact with the lower surface of the support leg portion.

(5) In the anti-vibration structure of (3), it is desirable that the anti-vibration rubber is a soft rubber at a portion in contact with the lower surface of the convex portion. In this case, at the time of normal operation of the vibration generating unit, a soft rubber effective for absorbing vibration of a minute amplitude is brought into contact with the lower surface of the convex portion of the support leg, and at the time of impact including transportation of the vibration generating unit, Almost the entire surface of the anti-vibration rubber that faces the lower surface of the support leg can be brought into contact with the support leg, and the vibration generation function by the vibration generator and the function to retain vibration and shock during transportation are more effective. Can be demonstrated.

(6) In the anti-vibration structure of (4), it is desirable that the anti-vibration rubber has a protruding portion that is a portion in contact with the lower surface of the support leg portion. In this case, during normal operation of the vibration generating unit, a soft rubber effective for absorbing vibration with a minute amplitude is brought into contact with the lower surface of the support leg, and when an impact is generated including when the vibration generating unit is transported, the support leg is The entire surface of the anti-vibration rubber facing the lower surface of the rubber can be brought into contact with the support leg, and the vibration generation function by the vibration generator and the function to retain vibrations and shocks during transportation are more effectively exhibited. Can be made.

(7) In the vibration-proof structure of (3), the convex portion can be a short cylindrical body. In this case, during normal operation of the vibration generating unit, the vibration generated by the vibration generating unit is attenuated at the portion of the anti-vibration rubber that comes into contact with the lower surface of the short cylindrical body of the support leg, and includes when the vibration generating unit is transported. When an impact is generated, the vibration generating portion can be held by bringing substantially the entire surface of the anti-vibration rubber facing the support leg portion into contact with the lower surface of the support leg portion.
(8) In the vibration proof structure according to (1), the support leg portion has an accommodation recess for accommodating the vibration generation portion,
The distance A of the step in the direction in which the load of the vibration generating portion is applied is defined as A <B, where B is the distance between the lowermost portion of the housing recess and the bottom surface on which the vibration generating portion is placed. It is desirable. In this case, even when the lower surface of the support leg abuts against the vibration isolating rubber against a large amplitude vibration such as vibration during transportation or a large displacement during a drop impact, the receiving recess of the support leg is Can be prevented from touching.

  According to the vibration isolating structure of the present invention, it is possible to absorb vibrations and impacts not only during operation of the vibration generating unit but also during its transportation.

It is a section explanatory view of one embodiment of the vibration isolating structure of the present invention. It is principal part cross-sectional explanatory drawing of other embodiment of the vibration isolating structure of this invention. It is principal part cross-sectional explanatory drawing of other embodiment of the vibration isolating structure of this invention. It is principal part cross-sectional explanatory drawing of other embodiment of the vibration isolating structure of this invention.

  Hereinafter, embodiments of the vibration isolating structure of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to the claim are included.

  FIG. 1 is an explanatory cross-sectional view of an anti-vibration structure 1 according to an embodiment of the present invention. The anti-vibration structure 1 according to the present embodiment prevents vibration generated by the compressor 2 that is a vibration generating unit provided in the outdoor unit of the air conditioner, and a support leg on which the compressor 2 is placed. A portion 3 and an anti-vibration rubber 4 for receiving the support leg 3 are provided. The compressor 2 is disposed on the bottom frame 5 constituting the bottom surface of the outdoor unit via the vibration isolation structure 1. The number of anti-vibration rubbers 4 is not particularly limited in the present invention, but is usually three or four.

  The support leg 3 has an accommodation recess 3 a that can accommodate the bottom of the compressor 2. In the vicinity of the edge portion of the support leg 3, the same number of holes 6 as the anti-vibration rubber 4 are formed. On the lower surface 3b of the support leg 3 (the lower surface in FIG. 1), that is, on the periphery of the hole 5 on the surface facing the anti-vibration rubber 4, a convex portion 7 made of a short cylindrical body is formed. This convex part 7 protrudes from the said lower surface 3b in the direction to which the load of the compressor 2 which is a vibration generation part is applied, ie, a vertical direction. This convex portion 7 constitutes a “step” in the present specification.

  The distance A (mm) between the lower surface 3b of the support leg 3 and the upper surface of the anti-vibration rubber 4 is not particularly limited in the present invention, but the lowermost part 3d of the housing recess 3a of the support leg 3 is not limited. If the distance between the bottom frame 5 and the upper surface 5a of the bottom frame 5 is B (mm), for example, A <B, preferably 0.5 <A <B / 2. As will be described later, even when the lower surface 3b of the support leg abuts against the vibration isolating rubber 4 with respect to vibration with a large amplitude such as vibration during transportation of the compressor 2 or large displacement during a drop impact, the support is supported. In order to prevent the housing recess 3a of the leg 3 from coming into contact with the bottom frame 5, it is desirable to satisfy A <B, and A <B / 2 considering a slight margin. The distance A is substantially equal to the protruding distance of the convex portion 7 constituting the step, that is, the distance of the step in the direction in which the load of the compressor 2 is applied.

  The anti-vibration rubber 4 has a cylindrical shape, and includes an inner layer 8 and an outer layer 9 provided in close contact with the inner layer 8 on the radially outer side of the inner layer 8. The inner layer 8 is made of a soft soft rubber such as natural rubber having a hardness of 30 to 50 as measured with a durometer type A, while the outer layer 9 is also a hardness of 50 to 70 as measured with a durometer type A. For example, it is made of hard hard rubber such as butyl rubber. The height and outer diameter of the anti-vibration rubber 4 may be appropriately selected according to the weight of the vibration generating portion, the number of the anti-vibration rubbers, etc., and are not particularly limited in the present invention. It is about 30-50 mm. Further, the thickness of the inner layer 8, that is, the size in the radial direction ((outer diameter−inner diameter) / 2)) can be set to, for example, 5 to 10 mm. On the other hand, the thickness of the outer layer 9, that is, the size in the radial direction ((outer diameter−inner diameter) / 2)) can be set to, for example, 5 to 10 mm.

  A bolt hole 11 through which a bolt 10 for fixing the support leg 3 to the bottom frame 5 can be inserted is formed in the bottom frame 5 where the vibration isolation rubber 4 of the vibration isolation structure 1 is disposed. Yes. A metal sleeve 12 is erected on the periphery of the bolt hole 11 on the inner surface 5 a of the bottom frame 5. A fixing nut 13 is welded to the bottom frame 5 so as to be concentric with the bolt hole 11 on the outer surface of the bottom frame 5.

  After the anti-vibration rubber 4 is inserted into the sleeve 12, the upper end portion of the sleeve 12 protruding from the upper surface of the anti-vibration rubber 4 is inserted into the hole 6 of the support leg 3 on which the compressor 2 is placed. Then, the supporting leg 3 is disposed on the vibration isolating rubber 4, and then the bolt 10 is inserted into the sleeve 12 and the bolt hole 11 and screwed with the fixing nut 13. 5 can be positioned. In FIG. 1, a member indicated by reference numeral 14 is a washer disposed between the head 10 a of the bolt 10 and the upper surface 3 c of the support leg 3.

  In the vibration isolating structure 1 according to the present embodiment, a convex portion 7 is formed on the lower surface 3b of the support leg 3 facing the vibration isolating rubber 4 so as to project in the direction in which the load of the compressor 2 that is a vibration generating portion is applied. In the normal operation of the compressor 2, the lower surface 7 a of the convex portion 7 comes into contact with the anti-vibration rubber 4 and absorbs vibration generated by the compressor 2. For the vibration with a large amplitude such as the vibration during the transportation of the compressor 2 and the large displacement at the time of the drop impact, the lower surface 3b of the supporting leg portion opposed to the vibration isolating rubber 4 as well as the convex portion 7 is provided. By abutting against the vibration isolating rubber 4, the function of absorbing the vibration and impact and holding the compressor 2 in a predetermined position can be exhibited.

  In other words, in the vibration isolating structure according to the present embodiment, substantially the entire surface of the anti-vibration rubber 4 (the surface facing the support leg 3) is placed on the support leg 3 when a large stress such as vibration or impact during transportation occurs. By making contact with each other and reducing the load per unit area acting on the surface, the anti-vibration rubber 4 exhibits the holding function of the compressor 2.

  Further, in the vibration isolating structure 1 according to the present embodiment, the vibration isolating rubber 4 is composed of the inner layer 8 made of soft rubber and the outer layer 9 made of hard rubber. A soft rubber that is effective in absorbing vibration is brought into contact with the lower surface of the convex portion 7 of the support leg 3, and when an impact is generated including when the compressor 2 is transported, not only the soft rubber but also a hard material having excellent strength. The rubber can be brought into contact with the support leg 3, and the function of damping the vibration by the compressor 2 and the function of holding the vibration and shock during transportation can be more effectively exhibited.

  FIG. 2 is a cross-sectional explanatory view of a main part of a vibration isolation structure 21 according to another embodiment of the present invention. 2 and FIGS. 3 to 4 to be described later, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted for simplicity. Unlike the anti-vibration structure 1 shown in FIG. 1, the anti-vibration structure 21 according to the present embodiment is formed with a protruding portion 27 that forms a step on the anti-vibration rubber 24 side instead of the support leg portion 23. The anti-vibration rubber 24 is made of the same material and is integrally formed as a whole. More specifically, a short cylindrical protrusion 27 is formed on a surface 24 a of the vibration-proof rubber 24 facing the support leg 23. The protrusion 27 is formed along the periphery of the central hole 24 b of the cylindrical vibration-proof rubber 24. An upper surface 27 a of the protruding portion 27 is in contact with a lower surface 23 a of the support leg portion 23.

  In the case of the vibration isolating structure 21 according to the present embodiment, during the normal operation of the compressor, the vibration caused by the compressor is attenuated by the contact between the upper surface 27a of the protrusion 27 of the vibration isolating rubber 24 and the lower surface 23a of the support leg 23. In the event of an impact including when the compressor is transported, the compressor is held by bringing substantially the entire surface 24a of the anti-vibration rubber 24 facing the support leg 23 into contact with the lower surface 23a of the support leg 23. be able to.

  FIG. 3 is an explanatory cross-sectional view of a main part of a vibration isolating structure 31 according to still another embodiment of the present invention. Unlike the anti-vibration structure 1 shown in FIG. 1, the anti-vibration structure 31 according to the present embodiment has a short cylindrical convex portion 37 formed on the support leg 33 that contacts the peripheral edge of the cylindrical anti-vibration rubber 34. Has been. The anti-vibration rubber 34 is made of the same material and is integrally formed as a whole. The convex portion 37 constituting the step is formed on the lower surface 33 a of the support leg portion 33 that faces the antivibration rubber 34.

  In the case of the vibration isolating structure 31 according to the present embodiment, during the normal operation of the compressor, the lower surface 37a of the convex portion 37 comes into contact with the vibration isolating rubber 34 and absorbs vibration generated by the compressor. In addition, the lower surface 33a of the support leg 33 facing the vibration isolating rubber 34 as well as the convex portion 37 is not susceptible to vibration with a large amplitude such as vibration during transportation of the compressor or large displacement during a drop impact. By contacting substantially the entire surface 34a of the vibration isolating rubber 34 that faces the support leg 33, the function of absorbing the vibration and impact and holding the compressor in place can be exhibited.

  FIG. 4 is an explanatory cross-sectional view of a main part of a vibration isolating structure 41 according to another embodiment of the present invention. Unlike the anti-vibration structure 21 shown in FIG. 2, the anti-vibration structure 41 according to the present embodiment has a protrusion 47 that forms a step at the peripheral edge of a cylindrical anti-vibration rubber 44. More specifically, a short cylindrical protrusion 47 is formed on a surface 44 a of the vibration-proof rubber 44 facing the support leg 43. The upper surface 47 a of the protrusion 47 is in contact with the lower surface 43 a of the support leg 43.

  In the case of the vibration isolating structure 41 according to this embodiment, during the normal operation of the compressor, the vibration due to the compressor is attenuated by the contact between the upper surface 47a of the protrusion 47 of the vibration isolating rubber 44 and the lower surface 43a of the support leg 43. In the event of an impact including when the compressor is transported, the compressor is held by bringing substantially the entire surface 44a of the anti-vibration rubber 44 facing the support leg 43 abuts against the lower surface 43a of the support leg 43. be able to.

[Other variations]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.
For example, in the above-described embodiment, a short cylindrical protrusion is protruded from the lower surface of the support leg toward the anti-vibration rubber, or a cylindrical protrusion is formed on the upper surface of the anti-vibration rubber. However, in the present invention, the aspect constituting the step is not limited to this, and for example, a circular or rectangular protrusion is formed in an island shape in a plan view on a part of the upper surface of the anti-vibration rubber, or Also, a circular or rectangular convex portion may be formed in an island shape on the lower surface of the support leg portion in the same plan view.

  Further, in the embodiment shown in FIGS. 2 to 4, the vibration-proof rubber is formed of a single material, but as in the embodiment shown in FIG. 1, two kinds of materials, that is, soft rubber and hard rubber, It can also be formed. For example, in the embodiment shown in FIG. 2, a portion on the inner diameter side including the protruding portion can be a cylindrical inner layer made of soft rubber, and a radially outer portion of the inner layer can be a cylindrical outer layer made of hard rubber. . Further, in the embodiment shown in FIG. 3, the outer diameter side of the anti-vibration rubber including the portion where the convex portion of the support leg abuts is a cylindrical outer layer made of soft rubber, and the radially inner portion of the outer layer is hard. A cylindrical inner layer made of rubber may be used.

DESCRIPTION OF SYMBOLS 1: Anti-vibration structure 2: Compressor 3: Support leg part 3a: Housing recessed part 3b: Lower surface 3c: Upper surface 3d: Bottom part 4: Anti-vibration rubber 5: Bottom frame 5a: Upper surface 6: Hole part 7: Convex part 7a: Lower surface 8: Inner layer 9: Outer layer 10: Bolt 10a: Head 11: Bolt hole 12: Sleeve 13: Fixing nut 14: Washer 21: Anti-vibration structure 23: Support leg 23a: Lower surface 24: Anti-vibration rubber 24a: Surface 24b : Center hole 27: Protruding part 27a: Upper surface 31: Anti-vibration structure 33: Support leg part 33a: Lower surface 34: Anti-vibration rubber 34a: Surface 37: Convex part 37a: Lower surface 41: Anti-vibration structure 43: Support leg part 43a: Lower surface 44: Anti-vibration rubber 44a: Surface 47: Projection 47a: Upper surface

Claims (8)

Support leg portions (3, 23, 33, 43) for supporting the vibration generating portion (2) and anti-vibration rubbers (4, 24, 34, 44) for receiving the support leg portions (3, 23, 33, 43) A vibration-proof structure (1, 21, 31, 41) comprising:
Either of the supporting leg portions (3, 23, 33, 43) and the anti-vibration rubber (4, 24, 34, 44) facing each other in the direction in which the load of the vibration generating portion (2) is applied. Anti-vibration structure with steps (1, 21, 31, 41).   The anti-vibration rubber (4) is a soft rubber that absorbs the vibration of the vibration generating part (2) during operation of the vibration generating part (2), and when an impact is generated including when the vibration generating part (2) is transported. The anti-vibration structure (1) according to claim 1, wherein the anti-vibration structure (1) is composed of hard rubber that comes into contact with the support leg (3).   The support leg portion (3, 33) has a convex portion (7, 37) constituting the step on a surface facing the anti-vibration rubber (4, 34), and the convex portion (7, 37). The anti-vibration structure (1, 31) according to claim 1 or 2, wherein a lower surface (7a, 37a) of the inner surface is in contact with the anti-vibration rubber (4, 34).   The anti-vibration rubber (24, 44) has projecting portions (27, 47) constituting the step on the surface facing the support leg portions (23, 43), and the projecting portions (27, 47). The anti-vibration structure (21, 41) according to claim 1 or 2, wherein an upper surface (27a, 47a) of the upper surface (27) is in contact with the support leg (23, 43).   The anti-vibration structure (1) according to claim 3, wherein the anti-vibration rubber (4) is a soft rubber at a portion that contacts the lower surface (7a) of the convex portion (7).   The said vibration-proof rubber (24, 44) is a soft rubber | gum in the protrusion part (27, 47) which is a part contact | abutted with the lower surface (23a, 43a) of the said support leg part (23, 43). Anti-vibration structure as described (21, 41).   The vibration isolating structure (1) according to claim 3, wherein the convex portion (7) is a short cylindrical body. The support leg (3, 23, 33, 43) has an accommodating recess (3a) for accommodating the vibration generating part (2),
The distance A of the step in the direction in which the load of the vibration generating part (2) is applied is the distance between the lowermost part (3d) of the receiving recess (3a) and the bottom surface on which the vibration generating part (2) is placed. The vibration-proof structure (1) according to claim 1, wherein B is defined as A <B.

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