• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a sound-absorbing device 1 which is intended to be arranged in connection with a gearbox housing 10 in a motor vehicle. The gearbox housing is shell-shaped and comprises an inner and an outer surface, these surfaces comprising a curved wall 2 connected to a flat end 3. The sound-absorbing device is shell-shaped and has a shape which substantially corresponds to the bowl-shaped housing of the gearbox housing. Furthermore, the sound-absorbing device is adapted to apply forces to the gearbox housing by directly or indirectly abutting against all or parts of the inner surface of the housing in order to dampen the vibrations of the housing. (Figure 2)
    公开号:SE1051148A1
    申请号:SE1051148
    申请日:2010-11-03
    公开日:2012-05-04
    发明作者:Dieter Slapak；Kenneth Hammarstedt
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    1015202530Summary of the inventionThe above objects are achieved by the invention defined by the independentthe patent claim.
    Preferred embodiments are claimed by the dependent claims.
    The invention relates to a sound attenuation device intended to be arranged in connection with onegearbox housing in a motor vehicle. The gearbox housing is cup-shaped and comprises an inner and aouter surface, these surfaces comprising a curved wall connected to a flat end.
    The sound attenuation device is cup-shaped and has a substantially substantially shapecorresponds to the bowl shape of the gearbox housing. Furthermore, the sound attenuation deviceadapted to apply forces to the gearbox housing by directly or indirectly abuttingall or part of the inner surface of the housing to dampen the vibrations of the housing.
    By arranging the sound-absorbing device in connection with the gearbox housing, it is appliedforces to reduce or completely eliminate the vibrations of the house. This is an advantage becausethe vehicle thus emits less noise.
    Suitably the sound attenuation device is arranged inside the gearbox housing. This is aadvantageous placement of the sound-absorbing device as there is a lack of space outsidethe gearbox housing.
    Short drawing descriptionFigure 1 shows a sound attenuation device arranged inside a gearbox housing, andFigure 2 shows a perspective view of the sound attenuation device.
    Detailed Description of Preferred Embodiments of the InventionThe invention relates to a sound attenuation device 1 as shown in figure 2, whichsound attenuation device is intended to be arranged in connection with a gearbox housing 10 in onemotor vehicle. The gearbox housing is cup-shaped and comprises an inner and an outer surface, wherein10152025303these surfaces comprise a curved wall 2 connected to a flat gable 3.
    The sound attenuation device is shell-shaped and has a substantially substantial shapecorresponds to the reasoning form of the gearbox housing. Furthermore, the sound attenuation deviceadapted to apply forces to the gearbox housing by directly or indirectly abuttingall or part of the inner surface of the housing to dampen the vibrations of the housing.
    Because the device abuts the inner surface of the gearbox housing, the inner surface and housing of the housing are loadedthereby dampens the vibrations in the walls of the gearbox housing. This force with whichThe device loading the house is an important aspect. One strives tothe abutment surface of the sound-absorbing device against the gearbox housing is spread out to such an extentas possible, which has proven to be an effective way to dampen the gearbox housingvibrations.
    The sound attenuation device preferably abuts a substantial part ofthe inner surface of the gearbox housing, for example, 50% attempts have been made. To achieve an effectivedamping of the vibrations of the housing, it is advisable for the device to abut with a large surfacetowards the house. The device may suitably have a point-like abutment, such as a gridor grids, where the contact points have been selected to achieve an effective damping ofthe vibrations of the house.
    Preferably, the sound attenuation device is adapted to be arranged inside the gearbox housing,which is shown in Figure 1. This is conveniently done by press fitting.
    The sound-absorbing device is pressed down into the gearbox housing. When the sound attenuation deviceis mounted in the gearbox housing, the forces are applied to the gearbox housing bythe sound attenuation device exerts a pressure of preferably between 0.25 and 2 bar. Atexperiments, for example, have proved to be particularly suitable.
    To achieve this pressure of the muffler inside the gearbox housing isthe external dimension of the sound attenuation device a predetermined degree greater thanthe internal dimension of the gearbox housing.10152025304According to a first embodiment, an elastic material 4 such as, for example, rubber, is plasticor silicone applied to the outside of the sound attenuation device. This elastic material isadapted to abut against the gearbox housing when the sound-absorbing device is mounted. Thethe elastic material may cover a continuous surface as shown, for example, in Figure 2.
    Alternatively, the elastic material is designed as a grid or strings.
    According to a second embodiment, the sound attenuation device abuts directly againstthe walls of the gearbox housing, ie. no elastic material is arranged onthe sound attenuation device.
    The sound attenuation device itself is made of magnesium, aluminum or someother metal or of another material such as plastic or sheet metal. When the material toused must be considered, among other things, which suspension the material has in order to be able to be press-fitted inthe gearbox housing. The sound attenuation device suitably has a wall thickness of between 2 and6 mm. In addition, it is suitable for the sound attenuation device at the edge of the wall surface 2which is furthest from the end surface 3 has a thickness which is slightly larger. This is an advantageways to achieve the desired pressure. The wall thickness of the sound attenuation device is designed so thatthe device is extremely stable and does not collapse when it is press-fitted in the housing.
    In a preferred embodiment, the sound attenuation device is made of magnesium andan elastic material of rubber is applied thereto. This embodiment is shown in Figure 2.
    The wall thickness of the sound-absorbing device made of magnesium is 2.5 mmand the wall thickness of the elastic applied to the outside of the sound attenuation devicethe material is 2 mm.
    One or more openings are provided in the end surface of the sound attenuation device, where itopening or these openings are delimited by an elevation or depression 5 ofthe end surface for tight abutment against parts that are intended to be connected to the gearbox housingthrough these openings.
    The present invention is not limited to the preferred embodiments described above.
    Various alternatives, modifications and equivalents can be used. The above embodiments shall5therefore not be considered as limiting the scope of protection of the invention, which isthe appended claims.
    权利要求:
    Claims (10)
    [1]
    A sound-absorbing device (1) intended to be arranged in connection with a gearbox housing (10) in a motor vehicle, the gearbox housing being cup-shaped and comprising an inner and an outer surface, these surfaces comprising a curved wall (2) connected to a flat end ( 3), characterized in that the sound damping device is cup-shaped and has a shape which substantially corresponds to the bowl shape of the gearbox housing and that the sound damping device is adapted to apply forces to the gearbox housing by directly or indirectly abutting all or parts of the housing surface to dampen the housing vibration. .
    [2]
    2. A sound damping device according to claim 1, characterized in that the sound damping device is adapted to be arranged inside the gearbox housing by press fitting.
    [3]
    3. A sound damping device according to claim 2, characterized in that the applying forces to the gearbox housing are achieved by the sound damping device intended to exert a pressure on the gearbox housing which is between 0.25 and 2 bar.
    [4]
    4. A sound damping device according to any one of claims 2 or 3, characterized in that the outer dimension of the sound damping device is a predetermined degree larger than the inner dimension of the gearbox housing.
    [5]
    5. A sound damping device according to any one of claims 2 to 4, characterized in that an elastic material (4) is applied to the outside of the sound damping device, such as for instance rubber, plastic or silicone, which elastic material is adapted to abut against the gearbox housing.
    [6]
    A sound attenuation device according to claim 5, characterized in that the elastic material covers a continuous surface. 10 15 20 7
    [7]
    7. A sound attenuation device according to claim 5, characterized in that the elastic material is designed as a grid or strings.
    [8]
    Sound attenuation device according to one of the preceding claims, characterized in that the sound attenuation device is made of magnesium, aluminum, plastic or sheet metal.
    [9]
    Sound attenuation device according to one of the preceding claims, characterized in that the sound attenuation device has a wall thickness of between 2 and 6 mm.
    [10]
    Sound attenuation device according to one of the preceding claims, characterized in that one or more of their openings are arranged in the end surface of the sound attenuation device, this opening or these openings being delimited by an elevation or depression (5) of the end face for tight abutment against parts intended to be connected to the gearbox housing through these openings.
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    同族专利:
    公开号 | 公开日
    SE535352C2|2012-07-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1051148A|SE535352C2|2010-11-03|2010-11-03|Silencing device|SE1051148A| SE535352C2|2010-11-03|2010-11-03|Silencing device|
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