CN211819652U - Sound insulation cover and engine with same - Google Patents

Abstract

The utility model belongs to the technical field of the engine sound insulation cover, concretely relates to sound insulation cover and have its engine. The utility model provides a sound-proof cover includes that shell and inlayer inhale the sound component, the inlayer inhale the sound component with the shell is connected, wherein, the material of shell is the SMC, the material that the sound component was inhaled to the inlayer is the polyurethane material. Through using the sound insulation cover among this technical scheme, inlayer sound absorbing material adopts the polyurethane material to make sound absorbing effect better, and the material of shell is the SMC, has metal material's high acoustic celotex and non-metal material's high damping, and high temperature non-deformable makes sound insulation cover and rotatory pulley system remain relatively fixed's design distance throughout in addition, has reduced the interference risk, and low temperature also can not become fragile, and the reliability is higher.

Description

Sound insulation cover and engine with same

Technical Field

The utility model belongs to the technical field of the engine sound insulation cover, concretely relates to sound insulation cover and have its engine.

Background

The deformation of factors such as vibration and high temperature of the sound insulation cover in the prior art is large, the accurate relative position cannot be guaranteed, the fixing mode is easy to fall off, and the influence can cause the high interference risk of the sound insulation cover and the rotating parts such as the belt. The existing common plastic shell has low surface density, poor sound insulation, high surface density of a metal shell, heavy weight and high vibration isolation difficulty of a metal sheet, and easily causes the problem of new structural radiation noise. The sound cotton is inhaled mostly to current sound insulation cover inlayer is ordinary and inhales the sound cotton, inhales the sound space ratio loose, and it is not good enough to inhale the sound effect, and the surface can not have fixed shape, needs a lot of rivets or similar mounting to retrain, inhales the sound cotton possibility inflation after long-time operation, very easily rolls up the cotton book of sound absorption in the belt train, leads to higher danger, therefore the effectual sound insulation cover of conventional sound insulation sound absorption is hardly used on engine pulley system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of poor sound absorption effect of the existing sound insulation cover at least. The purpose is realized by the following technical scheme:

the utility model discloses a first aspect provides an acoustic enclosure, include:

a housing;

the sound element is inhaled to the inlayer, the sound element is inhaled to the inlayer with the shell is connected, wherein, the material of shell is the SMC, the material that the sound element was inhaled to the inlayer is the polyurethane material.

Through using the sound insulation cover among this technical scheme, inlayer sound absorbing material adopts the polyurethane material to make sound absorbing effect better, and the material of shell is the SMC, has metal material's high acoustic celotex and non-metal material's high damping, and high temperature non-deformable makes sound insulation cover and rotatory pulley system remain relatively fixed's design distance throughout in addition, has reduced the interference risk, and low temperature also can not become fragile, and the reliability is higher.

In addition, according to the utility model discloses an acoustic shield still can have following additional technical characterstic:

in some embodiments of the invention, the inner sound absorbing element is connected to the outer shell by a first connector.

In some embodiments of the present invention, the first connecting member includes a screw, a sleeve and a gasket, the screw is inserted into the sleeve, and the gasket is sleeved on the screw and located away from one end of the sleeve.

In some embodiments of the present invention, the screw further has a first limiting portion, and the first limiting portion is offset from the housing.

In some embodiments of the present invention, the sleeve further has a second limiting portion, and the second limiting portion abuts against the inner layer sound-absorbing element.

In some embodiments of the invention, the gasket is located between the first limit portion and the housing.

The utility model discloses an in some embodiments, the sound proof cover periphery still is equipped with the fixed orifices seat, the second connecting piece that the fixed orifices seat can cooperate the looks adaptation carries out the fixed mounting.

In some embodiments of the invention, the inner sound-absorbing element has a thickness of 25-40 mm.

In some embodiments of the present invention, the number of the fixing hole seats is 5, and the number of the first connecting members is 4.

The utility model also provides an engine, this engine includes the sound proof cover among the above-mentioned embodiment.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 schematically shows an overall structural view of an acoustic shield according to an embodiment of the present invention;

fig. 2 schematically shows an overall structural view of another perspective of the sound-insulating cover according to an embodiment of the present invention;

fig. 3 schematically shows an overall structural view of a connecting member according to an embodiment of the present invention;

fig. 4 schematically shows a cross-sectional view of the overall structure of the sound insulation cover and the connecting piece in cooperation according to the embodiment of the present invention.

10: a housing, 11: a fixed hole seat;

20: an inner sound absorbing element;

30: first connecting member, 31: screw, 311: first stopper portion, 32: sleeve, 321: second stopper, 33: and (7) a gasket.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Fig. 1 schematically shows an overall structural schematic diagram of an acoustic shield according to an embodiment of the present invention. Fig. 2 schematically shows an overall structural diagram of another view angle of the sound-proof cover according to the embodiment of the present invention. As shown in fig. 1 and 2, the utility model provides an acoustic shield and have its engine. The utility model provides a sound proof cover includes that shell 10 and inlayer inhale sound component 20, and sound component 20 is inhaled to the inlayer and is connected with shell 10, and wherein, shell 10's material is the SMC, and the material that sound component 20 was inhaled to the inlayer is the polyurethane material.

Through using the sound insulation cover among this technical scheme, sound component 20 is inhaled to the inlayer adopts the polyurethane material to make sound absorption effect better, and the material of shell 10 is the SMC, has metal material's high acoustic celotex and non-metal material's high damping, and high temperature non-deformable makes sound insulation cover and rotatory belt train remain relatively fixed's design distance throughout in addition, has reduced the interference risk, and low temperature also can not become fragile, and the reliability is higher.

Further, in this embodiment, the inner sound-absorbing element 20 is connected to the outer shell 10 through the first connecting member 30, and is connected to the outer shell 10 through the first connecting member 30, so that the outer shell 10 or the inner sound-absorbing element 20 can be replaced conveniently, and the assembly and disassembly are convenient. The inner sound-absorbing element 20 in this embodiment is an open-cell injection molding structure, the shape is designed according to the shape of a belt wheel train, the open cell ratio and the density distribution of the ladder shape are controlled by a certain process, one surface is softer and is an open cell surface, and towards a noise source, different sound-absorbing performances can be achieved for low, medium and high frequencies by different control of the open cell ratio and the density distribution, so that the first sound-insulating effect is achieved. The shell 10 in this embodiment plays the second layer and gives sound insulation, play main sound insulation, this sound insulation cover shell 10 adopts SMC combined material, bulk density 1.8g/cm3, 67% of aluminium, therefore the surface density is close to aluminium but far above ordinary plastics or polyurethane foaming, sound insulation performance is good, the damping is 10 times of metal material again, consequently vibration damping performance is better than the metal, these two characteristics are that it has the high noise insulation of metal material and the high damping of non-metal material (have lower structure radiation noise promptly), in addition high temperature non-deformable makes sound insulation cover and rotatory belt train keep relatively fixed design distance all the time, interference risk has been reduced, low temperature also can not become fragile, the reliability is higher.

Specifically, in the present embodiment, as shown in fig. 3, the first connecting element 30 includes a screw 31, a sleeve 32, and a gasket 33, the screw 31 is disposed inside the sleeve 32, and the gasket 33 is disposed on the screw 31 and located at an end away from the sleeve 32. Screw 31 and sleeve 32 can lock each other, and the one end of screw 31 can be spacing to shell 10 simultaneously, and the one end of sleeve 32 can be spacing to the sound-absorbing component 20 of inlayer, and gasket 33 is used for increasing the friction area of screw 31 for the connecting piece can lock fixed shell 10 and the sound-absorbing component 20 of inlayer, has increased stability.

Specifically, in this embodiment, as shown in fig. 4, the screw 31 is further provided with a first limiting portion 311, the first limiting portion 311 abuts against the outer shell 10, and the abutting contact enables the first limiting portion 321 to lock the outer shell 10 on one side, so that the fastening performance is improved, and the sound absorption capability of the whole sound insulation cover is improved.

Further, in this embodiment, as shown in fig. 4, the sleeve 32 is further provided with a second limiting portion 321, the second limiting portion 321 abuts against the inner sound-absorbing element 20, and the abutting contact enables the second limiting portion 321 to lock the inner sound-absorbing element 20 on one side, so as to improve the fastening performance, and further improve the suction capability of the whole sound-insulating cover.

Further, in the present embodiment, as shown in fig. 4, the gasket 33 is located between the first limiting portion 311 and the housing 10, and the gasket 33 can increase the contact area, reduce the pressure, and prevent the looseness.

Specifically, in the present embodiment, the sound insulation cover is further provided with a fixing hole seat 11 at the periphery thereof, so that the rigidity of the housing 10 in the constrained state is improved, and the structural radiation noise is reduced. Meanwhile, the fixed hole seat 11 can be matched with the second connecting piece in a matched mode to be fixedly assembled, and the fixed hole seat is used for connecting the sound insulation cover with the basic vibration source, so that noise reduction and silencing treatment can be conducted.

Further, in the present embodiment, the thickness of the inner layer sound-absorbing member 20 is 25 to 40 mm. The sound absorbing element 20 of the inner layer can achieve different sound absorbing characteristics in low, middle and high frequency ranges under proper control of the aperture ratio and density, and the material thickness in this embodiment is about 25-40mm, and the sufficient thickness makes the sound absorbing effect better.

Specifically, in the present embodiment, the number of the fixing hole seats is 5, and the number of the first connecting members 30 is 4.

Specifically, in this embodiment, the housing 10 is fixed to the engine through the fixing hole seat 11 and the vibration damping mechanism fixed in the fixing hole seat 11, and further isolates the vibration transmitted by the engine, so that the sound insulation cover substantially eliminates the structural radiation noise problem, the excellent sound insulation characteristic is highlighted, the noise at the front side of the belt wheel train can be reduced by 3-4dBA through verification of a manufacturing sample, and the noise quality of the engine is improved.

The utility model also provides an engine, including above sound insulation cover.

Through using the engine among this technical scheme, the inlayer sound absorbing material of septum acoustic hood in the engine adopts the polyurethane material to make sound absorbing effect better, and the material of the shell of septum acoustic hood is the SMC, has the high acoustic celotency of metal material and non-metallic material's high damping, and high temperature non-deformable makes septum acoustic hood and rotatory belt train remain relatively fixed's design distance throughout in addition, has reduced the interference risk, and low temperature also can not become fragile, and the reliability is higher.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An acoustic enclosure, comprising:

a housing;

the sound element is inhaled to the inlayer, the sound element is inhaled to the inlayer with the shell is connected, wherein, the material of shell is the SMC, the material that the sound element was inhaled to the inlayer is the polyurethane material.

2. The acoustic enclosure of claim 1 wherein the inner sound absorbing element is connected to the outer shell by a first connector.

3. The acoustic enclosure of claim 2, wherein the first connector includes a screw, a sleeve, and a spacer, the screw is disposed inside the sleeve, and the spacer is disposed on the screw and located at an end away from the sleeve.

4. The acoustic enclosure of claim 3, wherein the screw further comprises a first limiting portion, and the first limiting portion abuts against the housing.

5. The acoustical shell of claim 4 wherein said sleeve further defines a second limit, said second limit abutting said inner sound absorbing element.

6. The acoustic enclosure of claim 4 wherein the gasket is located between the first retaining portion and the housing.

7. The sound insulation cover according to claim 2, wherein a fixing hole seat is further arranged on the periphery of the sound insulation cover, and the fixing hole seat can be fixedly assembled with a second connecting piece matched with the fixing hole seat.

8. The acoustical shell of claim 1 wherein the thickness of the inner sound absorbing element is from 25 to 40 mm.

9. The acoustic enclosure of claim 7 wherein the number of said mounting receptacles is 5 and the number of said first connectors is 4.

10. An engine characterized by having an acoustic shield according to any one of claims 1-9.

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