CN203888729U - Passenger bus noise reduction device - Google Patents
Passenger bus noise reduction device Download PDFInfo
- Publication number
- CN203888729U CN203888729U CN201420031236.7U CN201420031236U CN203888729U CN 203888729 U CN203888729 U CN 203888729U CN 201420031236 U CN201420031236 U CN 201420031236U CN 203888729 U CN203888729 U CN 203888729U
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- CN
- China
- Prior art keywords
- noise reduction
- reduction device
- step floor
- phonon crystal
- passenger bus
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a passenger bus noise reduction device. The passenger bus noise reduction device comprises a passenger bus luggage compartment, an engine, and a rear stage floor and a front stage floor which are arranged above the engine. The passenger bus noise reduction device further comprises photonic crystals, wherein the photonic crystals are welded on one side, close to the engine, of the rear stage floor and the front stage floor. Compared with the prior art, the passenger bus noise reduction device has the advantages of convenience in additional installation, easiness in implementation, remarkable noise reduction effect and the like.
Description
Technical field
The utility model relates to automotive field, especially relates to a kind of bus noise reduction device.
Background technology
At present, along with the progressively improvement of noise standard limit in passenger car, noise environmental issue becomes more and more important, and in car, noise is not only the forced examination requirement that passenger vehicle dispatches from the factory, and is also that outlet car meets one of Compulsory Feature project of Foreign certification.Along with the increase of China Coach export volume, International Certification increases gradually, and International Certification has strict requirement to the standard limit of passenger vehicle noise, and the International Certification of current domestic passenger vehicle noise is up to standard extremely difficult.
Along with the development of Bus & Coach Industry, people are more and more stricter to the requirement of passenger vehicle travelling comfort, control noise in car and are not only the protection to passenger, the important embodiment of passenger vehicle manufacture level especially.But noise standard limit is lower in current domestic passenger car, requirement that can not actual response passenger comfort.The own mandatory standard limit specification again to noise in passenger car of national standard body.Along with the mandatory enforcement of new nation's standard, noise control method and better construction technology in better car will inevitably be sought by China Coach manufacturer.
The noise of passenger vehicle, especially long-distance bus is large especially on the impact of traveling comfort, and the noise of passenger vehicle is mainly caused by engine vibration.
Summary of the invention
The purpose of this utility model is exactly to provide one to install additional conveniently in order to overcome the defect that above-mentioned prior art exists, and implements easily the obvious bus noise reduction device of noise reduction.
The purpose of this utility model can be achieved through the following technical solutions: a kind of bus noise reduction device, comprise bus luggage cabin, driving engine, and be positioned at backward step floor and the front step floor of driving engine top, it is characterized in that, also comprise phonon crystal, described phonon crystal is welded on the side near driving engine on backward step floor and front step floor.
Described phonon crystal is superposeed and forms up and down by silica gel and steel, and described silica gel and steel are all cylindrical, and shape same thickness is identical.
Described silica gel and the diameter of steel are 10cm, and thickness is 8mm.
Described phonon crystal is array format and is arranged on backward step floor and front step floor.
Compared with prior art, the utility model carries out the noise reduction of passenger vehicle by installing the phonon crystal of steel and silica gel composition on the floor near driving engine one side at the forward and backward step of passenger vehicle additional.The noise of passenger vehicle mostly belongs to low frequency, and this patent makes full use of the band gap properties of phonon crystal medium and low frequency, and the engine noise of passenger vehicle is significantly decayed, and reaches the object that improves passenger vehicle traveling comfort.
Brief description of the drawings
Fig. 1 is bus engine and floor panel structure figure;
Fig. 2 phonon crystal position of weld figure;
Fig. 3 phonon crystal constructional drawing.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
Embodiment
As shown in Figures 1 to 3, a kind of bus noise reduction device, comprise bus luggage cabin 1, driving engine 2, and be positioned at backward step floor 3 and the front step floor 4 of driving engine top, also comprise phonon crystal 8, described phonon crystal 8 is welded on backward step floor near the side 7 near driving engine on a side 5 of driving engine and front step floor.And in the side 6 near driving engine, be also welded with phonon crystal 8 at the connecting panel that connects backward step floor 3 and front step floor 4.Described phonon crystal 8 is array format and is arranged on backward step floor and front step floor, makes full use of the band gap characteristic of phonon crystal medium and low frequency, driving engine 30-150Hz is vibrated to the noise causing and significantly decay.
Described phonon crystal 8 is superposeed and forms up and down by silica gel 9 and steel 10, described silica gel 9 be all cylindrical identical with steel 10 shapes, and diameter is 10cm, thickness is all 8mm mutually.Phonon crystal 8 is phonon crystals of a kind of composite structure, has rigidity large, and intensity is high, the feature of convenient welding.Phonon crystal has the band gap characteristic of medium and low frequency, to the noise attentuation characteristic of medium and low frequency clearly.
Claims (3)
1. a bus noise reduction device, comprise bus luggage cabin, driving engine, and be positioned at backward step floor and the front step floor of driving engine top, it is characterized in that, also comprise phonon crystal, described phonon crystal is welded on the side near driving engine on backward step floor and front step floor;
Described phonon crystal is superposeed and forms up and down by silica gel and steel, and described silica gel and steel are all cylindrical, and shape same thickness is identical.
2. a kind of bus noise reduction device according to claim 1, is characterized in that, described silica gel and the diameter of steel are 10cm, and thickness is 8mm.
3. a kind of bus noise reduction device according to claim 1, is characterized in that, described phonon crystal is array format and is arranged on backward step floor and front step floor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420031236.7U CN203888729U (en) | 2014-01-17 | 2014-01-17 | Passenger bus noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420031236.7U CN203888729U (en) | 2014-01-17 | 2014-01-17 | Passenger bus noise reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203888729U true CN203888729U (en) | 2014-10-22 |
Family
ID=51715170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420031236.7U Expired - Fee Related CN203888729U (en) | 2014-01-17 | 2014-01-17 | Passenger bus noise reduction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203888729U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533269A (en) * | 2018-11-26 | 2019-03-29 | 中国人民解放军国防科技大学 | Low-frequency vibration-damping noise-reducing sound-insulating wall plate structure for aircraft cabin |
-
2014
- 2014-01-17 CN CN201420031236.7U patent/CN203888729U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533269A (en) * | 2018-11-26 | 2019-03-29 | 中国人民解放军国防科技大学 | Low-frequency vibration-damping noise-reducing sound-insulating wall plate structure for aircraft cabin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20190117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |