CN107826054A - A kind of sound-absorbing hood - Google Patents
A kind of sound-absorbing hood Download PDFInfo
- Publication number
- CN107826054A CN107826054A CN201711222363.XA CN201711222363A CN107826054A CN 107826054 A CN107826054 A CN 107826054A CN 201711222363 A CN201711222363 A CN 201711222363A CN 107826054 A CN107826054 A CN 107826054A
- Authority
- CN
- China
- Prior art keywords
- sound
- absorbing hood
- absorbing
- hood according
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0884—Insulating elements, e.g. for sound insulation for mounting around noise sources, e.g. air blowers
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
A kind of sound-absorbing hood.Mainly solve the problems, such as that existing automobile engine noise is excessive.It is characterized in that：The cover body includes being used for the contact surface contacted with engine（2）, the contact surface is provided with some sound-absorption holes（3）.The present invention provides a kind of sound-absorbing hood, and its contact surface contacted with engine is provided with sound-absorption hole, can absorb noise, increases the comfort level of seating.
Description
Technical field
Present invention relates particularly to automobile engine noise reduction field, and in particular to a kind of sound-absorbing hood.
Background technology
The engine of automobile is position caused by main noise at present, and engine noise can pass through thin plate and be passed to car
It is interior, the comfort level of passenger's seating is have impact on, on the other hand, vehicle structure is compact, can not install substantial amounts of acoustic material again, because
This is, it is necessary to which a kind of easy structure effectively absorbs noise.
The content of the invention
In order to overcome the shortcomings of background technology, the present invention provides a kind of sound-absorbing hood, mainly solves existing automobile
The problem of engine noise is excessive.
The technical solution adopted in the present invention is：
A kind of sound-absorbing hood, including cover body, the cover body include being used for the contact surface contacted with engine, the contact surface
It is provided with some sound-absorption holes.
The beneficial effects of the invention are as follows：The present invention provides a kind of sound-absorbing hood, its contact surface contacted with engine
Sound-absorption hole is provided with, noise can be absorbed, increases the comfort level of seating.
Brief description of the drawings
Fig. 1 is the schematic front view of one embodiment of the invention.
Fig. 2 is the sectional view at Figure 1A A.
Fig. 3 is the enlarged diagram at B in Fig. 2.
Fig. 4 is that the cover body of one embodiment of the invention forms the schematic diagram of structure.
Fig. 5 is the schematic diagram of the sound-absorbing effect of different pore size of the present invention, hole depth and pitch of holes.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：As illustrated, a kind of sound-absorbing hood, including cover body 1,
The cover body includes being used for the contact surface 2 contacted with engine, and the contact surface is provided with some sound-absorption holes 3.Cover body include with
The mounting surface of engine contact, the mounting surface can be the face of out-of-flatness, can be provided with groove above, bottom portion of groove can be provided with
Described sound-absorption hole, play a part of absorbing noise.
In the present embodiment, as illustrated, sound-absorption hole 3 is circular hole.Its sound-absorption hole is circular hole, naturally it is also possible to is triangle
Hole, square hole etc..
In the present embodiment, as illustrated, a diameter of 1.2mm ~ 2.5mm of the sound-absorption hole 3, hole depth be 1.2mm ~
2.5mm, pitch of holes are 1.5mm ~ 2.5mm.
A diameter of 1.5 mm of the sound-absorption hole 3, hole depth are 1.5 mm, pitch of holes 2mm.Referring to accompanying drawing 5, the application carries
10 embodiments are altogether supplied, it can be seen that in each frequency（50Hz, 125Hz, 250Hz, 1000Hz, 4000Hz, 5000Hz,
Refer here to the injection frequency of engine noise）In, relative to non-porous scheme 10, the acoustic absorptivity α 0 of other 9 schemes
There is obvious advantage, it can be deduced that the effect of sound-absorption hole, on the other hand, scheme 5（Its bore dia is 1.5 mm, hole depth 1.5
Mm, pitch of holes 2mm）Acoustic absorptivity there is obvious advantage with respect to other 8 porose schemes, its avg（Average value）
Other schemes are an advantage over, therefore, scheme 5 is preferred scheme.
In the present embodiment, as illustrated, the cover body 1 includes precoat 11, the adhesive linkage being sequentially provided with from top to bottom
12nd, puigging 13, adhesive linkage 14 and sound absorbing layer 15.Sound-absorption hole is arranged on sound absorbing layer, overall to use sandwich style composite construction,
, not only can be with heat-insulated with sound insulation using the principle of double-deck sound-and heat-insulated glass.
In the present embodiment, as illustrated, the puigging 13 is thermoplasticity blended felt, its density is 1-1.5g/ ㎡, thick
Spend 10-15mm.
In the present embodiment, as illustrated, the sound absorbing layer 15 is thermoplasticity blended felt, its density is 0.6-1g/ ㎡, thick
Spend 15-25mm.It is easy to be fitted on metal plate during fluffy sound absorbing layer entrucking, reduces the cavity resonance noise of metal plate.
The precoat 11 is non-woven fabrics.Non-woven fabrics has moistureproof, ventilative, flexible, light, not combustion-supporting, easy decomposition, nothing
The features such as poison is nonirritant, rich in color, cheap, recyclable.
The adhesive linkage 12 is hot melt adhesive film.The effect that hot melt adhesive film can also obtain in out-of-flatness body surface bonding.
Embodiment is not construed as limitation of the present invention, but any spiritual improvements introduced based on the present invention, all should be
Within protection scope of the present invention.
Claims (9)
1. a kind of sound-absorbing hood, including cover body（1）, it is characterised in that：The cover body includes being used for what is contacted with engine
Contact surface（2）, the contact surface is provided with some sound-absorption holes（3）.
A kind of 2. sound-absorbing hood according to claim 1, it is characterised in that：Sound-absorption hole（3）For circular hole.
A kind of 3. sound-absorbing hood according to claim 1, it is characterised in that：The sound-absorption hole（3）It is a diameter of
1.2mm ~ 2.5mm, hole depth are 1.2mm ~ 2.5mm, and pitch of holes is 1.5mm ~ 2.5mm.
A kind of 4. sound-absorbing hood according to claim 3, it is characterised in that：The sound-absorption hole（3）A diameter of 1.5
Mm, hole depth are 2 mm, pitch of holes 1.5mm.
A kind of 5. sound-absorbing hood according to claim 1, it is characterised in that：The cover body（1）Including from top to bottom
The precoat being sequentially provided with（11）, adhesive linkage（12）, puigging（13）, adhesive linkage（14）And sound absorbing layer（15）.
A kind of 6. sound-absorbing hood according to claim 5, it is characterised in that：The puigging（13）Mixed for thermoplasticity
Felt is spun, its density is（1-1.5）G/ ㎡, thickness（10-15）mm.
A kind of 7. sound-absorbing hood according to claim 6, it is characterised in that：The sound absorbing layer（15）Mixed for thermoplasticity
Felt is spun, its density is（0.6-1）G/ ㎡, thickness（15-25）mm.
A kind of 8. sound-absorbing hood according to claim 7, it is characterised in that：The precoat（11）For non-woven fabrics.
A kind of 9. sound-absorbing hood according to claim 8, it is characterised in that：The adhesive linkage（12）For PUR
Film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222363.XA CN107826054A (en) | 2017-11-29 | 2017-11-29 | A kind of sound-absorbing hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222363.XA CN107826054A (en) | 2017-11-29 | 2017-11-29 | A kind of sound-absorbing hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107826054A true CN107826054A (en) | 2018-03-23 |
Family
ID=61646370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711222363.XA Pending CN107826054A (en) | 2017-11-29 | 2017-11-29 | A kind of sound-absorbing hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107826054A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201689671U (en) * | 2010-06-08 | 2010-12-29 | 东北大学 | Foamed aluminum sound absorbing plate |
| CN202358185U (en) * | 2011-12-01 | 2012-08-01 | 东风汽车有限公司 | Passenger car engine hood |
| CN203294026U (en) * | 2013-06-06 | 2013-11-20 | 奇瑞万达贵州客车股份有限公司 | Passenger car engine blimp |
| CN205220813U (en) * | 2015-12-30 | 2016-05-11 | 王涛 | Automobile engine cover |
| CN206475833U (en) * | 2016-12-22 | 2017-09-08 | 重庆佩尔哲汽车内饰***有限公司 | A kind of sound insulating pad of front wall board of automobile |
-
2017
- 2017-11-29 CN CN201711222363.XA patent/CN107826054A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201689671U (en) * | 2010-06-08 | 2010-12-29 | 东北大学 | Foamed aluminum sound absorbing plate |
| CN202358185U (en) * | 2011-12-01 | 2012-08-01 | 东风汽车有限公司 | Passenger car engine hood |
| CN203294026U (en) * | 2013-06-06 | 2013-11-20 | 奇瑞万达贵州客车股份有限公司 | Passenger car engine blimp |
| CN205220813U (en) * | 2015-12-30 | 2016-05-11 | 王涛 | Automobile engine cover |
| CN206475833U (en) * | 2016-12-22 | 2017-09-08 | 重庆佩尔哲汽车内饰***有限公司 | A kind of sound insulating pad of front wall board of automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180323 |
|
| RJ01 | Rejection of invention patent application after publication |