EP1630789B1 - Device for noise conduction in a motor vehicle - Google Patents

Device for noise conduction in a motor vehicle Download PDF

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Publication number
EP1630789B1
EP1630789B1 EP05107786A EP05107786A EP1630789B1 EP 1630789 B1 EP1630789 B1 EP 1630789B1 EP 05107786 A EP05107786 A EP 05107786A EP 05107786 A EP05107786 A EP 05107786A EP 1630789 B1 EP1630789 B1 EP 1630789B1
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EP
European Patent Office
Prior art keywords
flap
membrane
gap
housing
transmission
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Not-in-force
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EP05107786A
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German (de)
French (fr)
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EP1630789A1 (en
Inventor
Matthias Alex
Frank Pfeiffer
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Mann and Hummel GmbH
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Mann and Hummel GmbH
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Publication of EP1630789A1 publication Critical patent/EP1630789A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1294—Amplifying, modulating, tuning or transmitting sound, e.g. directing sound to the passenger cabin; Sound modulation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes

Definitions

  • the invention relates to a device for transmitting noise in a motor vehicle having the features according to the preamble of claim 1.
  • Modern motor vehicles have very quiet internal combustion engines as drive motors whose operating noise in the interior of the vehicle is barely perceptible.
  • the operating noise of the internal combustion engine is drowned out under certain circumstances by secondary noises of the rolling wheels, a switched on ventilation or the like. Under certain circumstances, it may be desirable to audibly transmit the operating noise of the drive motor into the interior of the motor vehicle.
  • EP 1 306 829 A2 discloses a device for transmitting engine noise in which a housing with a partition bounded two separate subspaces.
  • the partition is broken by a hinged flap, which divides the two subspaces.
  • the first subspace is connected to the intake manifold of the internal combustion engine, while the second subspace to a wall of the Vehicle or directly into the interior is guided.
  • sound pressure oscillations in the intake pipe act on the half of the transmission flap projecting there, which is excited to pivot.
  • the oscillating pivotal movement of the transfer flap leads to a sound transmission to the vehicle interior.
  • the subspace connected to the intake manifold may have a static medium pressure deviating from the subspace associated with the vehicle interior.
  • a seal is provided between a gap between the axis of rotation of the transfer flap and the edges of the adjacent dividing wall.
  • the flap has on both sides depending on an axis-parallel web, which is held to seal pressing between rubber seals the partition.
  • the pressure in connection with the comparatively stiff sealing material impedes the free pivotability of the transmission flap. Resonances are damped. The potential of the arrangement shown there is not fully exploited in terms of the achievable efficiency of sound transmission.
  • the invention has the object of providing a device of the type described in such a way that a noise transmission is given with improved effectiveness.
  • the object is achieved by a device for noise transmission with the features of claim 1.
  • the transmission flap is pivotally mounted in a pivot bearing opening of the partition wall. Between an edge of the pivot bearing opening and the transfer flap, a gap is provided which is pressure-tightly sealed by means of a membrane.
  • a membrane in the context of the present invention, a thin-walled, flat component is to be regarded, which has at least approximately only in its plane a certain stiffness and is transverse to soft.
  • the virtually non-existent or at least negligible bending and torsional stiffness of the membrane leads to an almost complete mechanical decoupling of the pivotable transfer flap of the stationary housing.
  • the transmission flap can swing freely and transmit the sound with improved effectiveness.
  • the membrane is pressure-tightly connected to the transmission flap along the pivot axis.
  • This allows a flat, flat design of the membrane, which is suitable for centering the transmission flap due to its rigidity in the membrane plane.
  • essentially only a transverse deformation of the membrane is brought about via the attachment along the pivot axis during a pivoting movement.
  • a proportion of longitudinal deformation in the Diaphragm level is negligible.
  • the transfer flap is better decoupled from the housing in the axis area.
  • the gap and the gap-closing membrane is guided around the cross-section of the transfer flap annularly.
  • a seal on the flap surfaces along the pivot axis and a seal in the critical region of the near-axis end edge is given.
  • the particular one-piece guided around the flap membrane experiences in this area a combined bending and torsional deformation, with respect to which the membrane is yielding. This results in a circumferential, hermetically sealed seal without obstruction of the transfer flap in its pivoting movement.
  • the membrane is held on the housing side on an outer frame and / or on the flap side on an inner frame.
  • a preassembled membrane assembly can be created and assembled as a unit.
  • the frame absorbs the required mounting, clamping or other external forces and keeps them away from the membrane due to its own rigidity. External forces are kept away from the transmission flap, which is thus unaffected in their free movement.
  • a torsion-elastic web running from the inner frame to the outer frame in the region of the pivot axis.
  • the torsionally soft Web serves as a pivot axis for the transmission flap, which ends on the outside of the outer frame and is not passed through the housing or stored in another form. Leaks in the storage area are avoided.
  • the web has a certain rigidity or load capacity in the transverse direction. Differential pressures acting on the diaphragm can not lead to a lateral deflection of the transmission flap transversely to the membrane plane.
  • the transfer flap is held in a precise position and can adjoin the housing on the outside with little gap tolerance.
  • the one-piece design for example as injection-molded plastic molding further increases the position accuracy with reduced manufacturing costs.
  • the frame unit can also be designed in one piece with the transmission flap itself. Overall, this contributes to a simplified construction to increase the tightness and thus to increase the efficiency.
  • the outer frame is held positively in a groove on the edge of the pivot bearing opening. This results in the possibility of simplified assembly by the outer frame is clamped in the connection of the housing parts in the corresponding groove sections.
  • the clamping positive locking attachment of the outer frame in addition to a positionally accurate fixation of the transfer flap creates a good sealing effect within the arrangement and also to the outside.
  • the resulting clamping forces are absorbed by the outer frame and kept away from the membrane or the transmission flap, so that their freedom of movement is ensured.
  • Fig. 1 shows a sectional view of a device for transmitting noise in a motor vehicle according to the prior art.
  • the device comprises a housing 1 with an inner partition wall 2, wherein the housing 1 and the inner partition wall 2 define two separate subspaces 3, 4.
  • a part of the housing 1 is formed on an intake pipe 17 of an internal combustion engine, not shown, of a motor vehicle, wherein the first compartment 3 is connected sound pressure transmitting with the interior of the intake pipe 17.
  • the second subspace 4 is fluidly separated from the first subspace 3 by means of the partition wall 2.
  • a transfer flap 6 is provided, which breaks through the dividing wall 2 in a pivot bearing opening 9 and which is pivotably mounted about a pivot axis 5 lying in the dividing wall 2 or in the pivot bearing opening 9.
  • the transmission flap 6 extends on both sides of the pivot axis 5 to form a small gap to close to the inner wall of the housing 1 and divides the two subspaces 3, 4 in respective individual rooms 3 ', 3 ", 4', 4" on.
  • the individual space 4 "of the subspace 4 is connected by means of an outlet 19 sound pressure transmitting with a wall of the interior of the motor vehicle, not shown, or directly to the interior.
  • the transfer flap 6 is shown in its neutral position, starting from which it can perform an oscillating pivoting movement in the direction of a double arrow 28.
  • the swivel range is about 10 °.
  • the static pressure in the intake pipe 17 acts on both sides of the transfer flap 6 via the gap between the transfer flap 6 and the housing 1 in the first subspace 3 and thus has no effect on the deflection thereof.
  • An oscillating sound pressure in the intake pipe 17 acts in the direction of an arrow 18 on the transfer valve 6, without being able to penetrate the narrow gap to a significant degree.
  • the oscillating transmission flap 6 causes in the second subspace 4, the generation of a like-like, offset by 180 ° sound pressure in the individual room 4 ", by means of the exit 19 is made audible in the interior of the motor vehicle.
  • the transfer flap 6 is mounted fluidically tight in the partition wall 2.
  • the arrangement acts independently of the static pressure in the intake pipe 17 and is thus in particular for the operation of a supercharged drive motor, for example in a Saugrohr Scheme between a turbocharger and the engine suitable.
  • the pivot bearing opening 9 is sealed in the region of the pivot axis 5.
  • the transmission flap 6 has on its two surfaces in each case a parallel to the pivot axis 5 extending web 24.
  • the partition wall 2 carries at its edges 10 of the pivot bearing opening 9 U-shaped rubber seals 25.
  • the housing 1 is screwed by means of flanges 27. It may also be advantageous to use another suitable connection such as gluing or welding.
  • the rubber seals 25 are pressed by the two halves of the partition wall 2 sealingly against the respective web 24. The sealing effect is dependent on the applied compressive force, which in turn affects the pivotability of the transfer valve 6 in connection with the stiffness of the rubber seals 25 or impaired.
  • the housing 1 consists of two housing halves 20, 21, to which the partition wall 2 is integrally formed in one half.
  • the two housing halves 20, 21 are screwed together on a flange 22.
  • the transfer flap 6 is held along its peripheral edge 7 in the likewise encircling rubber-elastic frame 26.
  • the frame 26 has for this purpose an internal groove in which the transfer flap 6 is held in a form-fitting manner.
  • In the outer region of the frame 26 is in the flange 22 between the two housing halves 20, 21 positively secured or clamped.
  • the two housing halves 20, 21 are screwed together at screw holes 29 of the flange 22 and hold the frame 26th
  • the frame 26 is designed in two parts such that its outer region is fastened to the housing 1 and its inner region to the transfer flap 6 to form an intermediate gap 16.
  • the frame 26 forms a sealing element 8 between the peripheral edge 7 of the transfer flap 6 and the inner wall of the housing 1, wherein the gap 16 allows a free pivoting of the transfer flap 6.
  • the membrane 11 may bellows-like, wavy or spatially formed in some other way and is flat in the embodiment shown.
  • the membrane 12 is defined in the context of the present invention as a thin-walled, planar structure which is substantially yielding transversely to its plane.
  • the membrane 12 may be formed from a rubber, fabric or plastic film or from a metal foil or a thin sheet to achieve the corresponding mechanical properties.
  • the membrane 12 which is flexible transversely to its plane, permits its pivotal movement in the direction of the double arrow 28.
  • the membrane 12 essentially undergoes a bending deformation transversely to its membrane plane. In this direction, the membrane 12 is substantially soft. It may also be expedient to provide the membrane 12 with a defined residual rigidity in the bending direction.
  • the membrane 12 can also be used for fixing the position of the transfer flap 6 transversely to the membrane plane. It may be possible to dispense with the formation of separate stub axle or other elements for guiding the pivoting movement.
  • the membrane 12 is on the housing side held on an outer frame 13, which in turn is positively secured in a groove 23 at the edge 10 of the pivot bearing opening 9 and thus on the partition wall 2.
  • the assembly of the transfer flap 6 with the membrane 12 and the outer frame 13 is attached by clamping next to the frame 26.
  • the clamping force of the screw on the flange 22 causes a pressure-tight clamping of the outer frame 13 in the groove 23rd
  • FIG. 3 shows a schematic diagram of a cross section through the transfer flap 6 in the region of the pivot axis 5, wherein the selected view also represents a top view of the membrane 12.
  • the membrane 12 is fastened to the inner frame 14 on the inside and to the outer frame 13 on the outside, for which purpose indicated attachment points 30 are provided.
  • the inner frame 14 is pressure-tight with the transmission flap 6 and the outer frame 13 pressure-tight manner with the housing 1 (Fig. 2).
  • the membrane 12 is pressure-tightly secured to the outer and inner frames 13, 14, whereby a total of the circumferential gap 11 is hermetically sealed.
  • the material of the membrane 12 has such a rigidity that, in conjunction with the flat configuration of the membrane 12, the transfer flap 6 is exactly fixed in position in every lateral direction in the membrane plane shown, but permits a pivotability about the pivot axis 5. On the arrangement of a separate axle component or the like was omitted.
  • Fig. 4 shows a variant of the arrangement according to Fig. 3, in which both sides of the end edges of the transfer flap along the pivot axis 5 each extending a torsionally elastic web 15 is provided.
  • the torsion-elastic web 15 extends from the end edge of the transmission flap 6 and from the lying there portion of the inner frame 14 to the outer frame 13.
  • the two torsion-elastic webs 15 form axle elements for guiding the transmission flap 6 in its pivotal movement about the pivot axis 5, by at the corresponding pivotal movement as well as the adjacent region of the membrane 12 are subjected to a torsional deformation.
  • the inner frame 14, the webs 15 and the outer frame 13 are made in one piece as an injection-molded plastic component in the embodiment shown. It may also be expedient to additionally produce the membrane 12 and also the transfer flap 6 in one piece with the abovementioned components, for example by way of injection molding.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Control Of Electric Motors In General (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The device has a housing with an inner partition wall, which together define subspaces (3, 4). A transmission valve (6) supported in the area of a pivot bearing opening (9) separates the subspaces. The subspaces are connected with an intake manifold of an internal combustion engine and an internal space of a motor vehicle. A gap (11) between an edge of the opening and the valve is closed by a membrane (12) in a pressure-tight manner.

Description

Die Erfindung betrifft eine Vorrichtung zur Geräuschübertragung in einem Kraftfahrzeug mit den Merkmalen nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for transmitting noise in a motor vehicle having the features according to the preamble of claim 1.

Moderne Kraftfahrzeuge weisen sehr laufruhige Verbrennungsmotoren als Antriebsmotoren auf, deren Betriebsgeräusch im Innenraum des Kraftfahrzeuges kaum wahrnehmbar ist. Das Betriebsgeräusch des Verbrennungsmotors wird unter bestimmten Umständen von Sekundärgeräuschen der abrollenden Räder, einer eingeschalteten Lüftung oder dgl. übertönt. Unter bestimmten Umständen kann es wünschenswert sein, die Betriebsgeräusche des Antriebsmotors in den Innenraum des Kraftfahrzeuges hörbar zu übertragen.Modern motor vehicles have very quiet internal combustion engines as drive motors whose operating noise in the interior of the vehicle is barely perceptible. The operating noise of the internal combustion engine is drowned out under certain circumstances by secondary noises of the rolling wheels, a switched on ventilation or the like. Under certain circumstances, it may be desirable to audibly transmit the operating noise of the drive motor into the interior of the motor vehicle.

Aus der gattungsbildenden EP 1 306 829 A2 ist eine Vorrichtung zur Übertragung von Brennkraftmaschinengeräuschen bekannt, bei der ein Gehäuse mit einer Trennwand zwei voneinander getrennte Teilräume begrenzt. Die Trennwand ist von einer schwenkbaren Klappe durchbrochen, die die beiden Teilräume aufteilt. Der erste Teilraum ist mit dem Ansaugrohr der Brennkraftmaschine verbunden, während der zweite Teilraum zu einer Wand des Fahrzeuges oder direkt in dessen Innenraum geführt ist. Schalldruckschwingungen im Ansaugrohr wirken im ersten Teilraum auf die dort hineinragende Hälfte der Übertragungsklappe, die zu einer Schwenkbewegung angeregt wird. Im zweiten Teilraum führt die schwingende Schwenkbewegung der Übertragungsklappe zu einer Schallübertragung zum Fahrzeuginnenraum.From the generic EP 1 306 829 A2 discloses a device for transmitting engine noise is known in which a housing with a partition bounded two separate subspaces. The partition is broken by a hinged flap, which divides the two subspaces. The first subspace is connected to the intake manifold of the internal combustion engine, while the second subspace to a wall of the Vehicle or directly into the interior is guided. In the first subspace, sound pressure oscillations in the intake pipe act on the half of the transmission flap projecting there, which is excited to pivot. In the second subspace, the oscillating pivotal movement of the transfer flap leads to a sound transmission to the vehicle interior.

Der mit dem Ansaugrohr verbundene Teilraum kann einen von dem mit dem Fahrzeuginneren verbundenen Teilraum abweichenden statischen Mitteldruck haben. Zur Aufrechterhaltung dieser statischen Druckdifferenz ist eine Abdichtung eines Spaltes zwischen der Drehachse der Übertragungsklappe und den Rändern der angrenzenden Trennwand vorgesehen. Die Klappe weist dazu beidseitig je einen achsparallelen Steg auf, der zur Abdichtung pressend zwischen Gummidichtungen der Trennwand gehalten ist. Die Pressung in Verbindung mit dem vergleichsweise steifen Dichtungsmaterial behindert die freie Schwenkbarkeit der Übertragungsklappe. Resonanzen werden gedämpft. Das Potential der dort gezeigten Anordnung ist hinsichtlich des erzielbaren Wirkungsgrades der Schallübertragung nicht voll ausgeschöpft.The subspace connected to the intake manifold may have a static medium pressure deviating from the subspace associated with the vehicle interior. In order to maintain this static pressure difference, a seal is provided between a gap between the axis of rotation of the transfer flap and the edges of the adjacent dividing wall. The flap has on both sides depending on an axis-parallel web, which is held to seal pressing between rubber seals the partition. The pressure in connection with the comparatively stiff sealing material impedes the free pivotability of the transmission flap. Resonances are damped. The potential of the arrangement shown there is not fully exploited in terms of the achievable efficiency of sound transmission.

Weitere Vorrichtungen zur Geräuschübertragung in einem Kraftfahrzeug sind aus der DE-A-102 23 875 und der DE-A-100 42 012 bekannt.Further devices for transmitting noise in a motor vehicle are known from DE-A-102 23 875 and DE-A-100 42 012.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs angegebenen Gattung derart weiterzubilden, daß eine Geräuschübertragung mit verbesserter Wirksamkeit gegeben ist.The invention has the object of providing a device of the type described in such a way that a noise transmission is given with improved effectiveness.

Die Aufgabe wird durch eine Vorrichtung zur Geräuschübertragung mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved by a device for noise transmission with the features of claim 1.

Es wird eine Vorrichtung zur Geräuschübertragung in einem Kraftfahrzeug vorgeschlagen, deren Übertragungsklappe in einer Schwenklageröffnung der Trennwand schwenkbar gelagert ist. Zwischen einem Rand der Schwenklageröffnung und der Übertragungsklappe ist ein Spalt vorgesehen, der mittels einer Membran druckdicht verschlossen ist. Als Membran im Sinne der vorliegenden Erfindung ist ein dünnwandiges, flächiges Bauteil anzusehen, welches zumindest näherungsweise ausschließlich in seiner Ebene eine gewisse Steifigkeit aufweist und quer dazu weich ist. Mittels der Membran kann der Spalt der Schwenklageröffnung zuverlässig druckdicht überspannt werden, wodurch ein Druckausgleich zwischen den beiden Teilräumen der Vorrichtung ausgeschlossen ist. Die praktisch nicht vorhandene oder zumindest vernachlässigbare Biege- und Torsionssteifigkeit der Membran führt zu einer nahezu vollständigen mechanischen Abkopplung der schwenkbaren Übertragungsklappe von dem ortsfesten Gehäuse. Die Abdichtung im achsnahen Bereich der Übertragungsklappe erfolgt ohne mechanische Wechselwirkung mit ihr. Die Übertragungsklappe kann frei schwingen und den Schall mit verbesserter Wirksamkeit übertragen.It is proposed a device for transmitting noise in a motor vehicle, the transmission flap is pivotally mounted in a pivot bearing opening of the partition wall. Between an edge of the pivot bearing opening and the transfer flap, a gap is provided which is pressure-tightly sealed by means of a membrane. As a membrane in the context of the present invention, a thin-walled, flat component is to be regarded, which has at least approximately only in its plane a certain stiffness and is transverse to soft. By means of the membrane, the gap of the pivot bearing opening can be reliably compressed pressure-tight, whereby a pressure equalization between the two subspaces of the device is excluded. The virtually non-existent or at least negligible bending and torsional stiffness of the membrane leads to an almost complete mechanical decoupling of the pivotable transfer flap of the stationary housing. The seal in the near-axis region of the transfer flap without mechanical interaction with her. The transmission flap can swing freely and transmit the sound with improved effectiveness.

In vorteilhafter Weiterbildung ist die Membran entlang der Schwenkachse mit der Übertragungsklappe druckdicht verbunden. Dies erlaubt eine flache, ebene Ausführung der Membran, die aufgrund ihrer Steifigkeit in der Membranebene zur Zentrierung der Übertragungsklappe geeignet ist. Gleichzeitig wird über die Befestigung entlang der Schwenkachse bei einer Schwenkbewegung im wesentlichen nur eine Querverformung der Membran herbeigeführt. Ein Anteil an Längsverformung in der Membranebene ist vernachlässigbar klein. Die Übertragungsklappe ist im Achsbereich verbessert vom Gehäuse entkoppelt.In an advantageous embodiment, the membrane is pressure-tightly connected to the transmission flap along the pivot axis. This allows a flat, flat design of the membrane, which is suitable for centering the transmission flap due to its rigidity in the membrane plane. At the same time essentially only a transverse deformation of the membrane is brought about via the attachment along the pivot axis during a pivoting movement. A proportion of longitudinal deformation in the Diaphragm level is negligible. The transfer flap is better decoupled from the housing in the axis area.

Vorteilhaft ist der Spalt und die den Spalt verschließende Membran ringförmig um den Querschnitt der Übertragungsklappe herumgeführt. Neben einer Abdichtung an den Klappenflächen entlang der Schwenkachse ist auch eine Abdichtung im kritischen Bereich der achsnahen Stirnkante gegeben. Die insbesondere einteilig um die Klappe herumgeführte Membran erfährt in diesem Bereich eine kombinierte Biege- und Torsionsverformung, bezüglich derer die Membran nachgiebig ist. Es ergibt sich eine umlaufende, hermetisch abgeschlossene Abdichtung ohne Behinderung der Übertragungsklappe in ihrer Schwenkbewegung.Advantageously, the gap and the gap-closing membrane is guided around the cross-section of the transfer flap annularly. In addition to a seal on the flap surfaces along the pivot axis and a seal in the critical region of the near-axis end edge is given. The particular one-piece guided around the flap membrane experiences in this area a combined bending and torsional deformation, with respect to which the membrane is yielding. This results in a circumferential, hermetically sealed seal without obstruction of the transfer flap in its pivoting movement.

In vorteilhaften Weiterbildungen ist die Membran gehäuseseitig an einem Außenrahmen und/oder klappenseitig an einem Innenrahmen gehalten. Mittels des oder der Rahmen kann eine vormontierte Membranbaugruppe geschaffen und als Einheit montiert werden. Der Rahmen nimmt die erforderlichen Montage-, Klemm- oder andere äußere Kräfte auf und hält sie aufgrund seiner eigenen Steifigkeit von der Membran fern. Äußere Kräfte werden von der Übertragungsklappe ferngehalten, die damit in ihrer Freigängigkeit unbeeinflußt ist.In advantageous developments, the membrane is held on the housing side on an outer frame and / or on the flap side on an inner frame. By means of the frame or frames, a preassembled membrane assembly can be created and assembled as a unit. The frame absorbs the required mounting, clamping or other external forces and keeps them away from the membrane due to its own rigidity. External forces are kept away from the transmission flap, which is thus unaffected in their free movement.

Zweckmäßig ist im Bereich der Schwenkachse ein vom Innenrahmen zum Außenrahmen verlaufender torsionselastischer Steg vorgesehen. Insbesondere sind dabei der Innenrahmen und der Außenrahmen mittels des Steges verbunden und bevorzugt zusammen mit dem Steg einteilig ausgeführt. Der torsionsweiche Steg dient dabei als Schwenkachse für die Übertragungsklappe, die außenseitig am Außenrahmen endet und nicht durch das Gehäuse hindurchgeführt oder in anderer Form gelagert ist. Undichtigkeiten im Lagerbereich sind vermieden. Darüber hinaus hat der Steg eine gewisse Steifigkeit bzw. Belastbarkeit in Querrichtung. An der Membran wirkende Differenzdrücke können nicht zu einer seitlichen Auslenkung der Übertragungsklappe quer zur Membranebene führen. Die Übertragungsklappe ist lagegenau gehalten und kann mit geringen Spalttoleranzen außenseitig an das Gehäuse angrenzen. Die einstückige Ausbildung beispielsweise als spritzgegossenes Kunststofformteil steigert weiter die Lagegenauigkeit bei verringertem Fertigungsaufwand. Insbesondere kann die Rahmeneinheit auch einteilig mit der Übertragungsklappe selbst ausgeführt sein. Dies trägt insgesamt bei vereinfachtem Aufbau zur Steigerung der Dichtigkeit und damit zur Erhöhung des Wirkungsgrades bei.It is expedient to provide a torsion-elastic web running from the inner frame to the outer frame in the region of the pivot axis. In particular, while the inner frame and the outer frame are connected by means of the web and preferably designed in one piece together with the web. The torsionally soft Web serves as a pivot axis for the transmission flap, which ends on the outside of the outer frame and is not passed through the housing or stored in another form. Leaks in the storage area are avoided. In addition, the web has a certain rigidity or load capacity in the transverse direction. Differential pressures acting on the diaphragm can not lead to a lateral deflection of the transmission flap transversely to the membrane plane. The transfer flap is held in a precise position and can adjoin the housing on the outside with little gap tolerance. The one-piece design, for example as injection-molded plastic molding further increases the position accuracy with reduced manufacturing costs. In particular, the frame unit can also be designed in one piece with the transmission flap itself. Overall, this contributes to a simplified construction to increase the tightness and thus to increase the efficiency.

In einer vorteilhaften Ausführung ist der Außenrahmen in einer Nut am Rand der Schwenklageröffnung formschlüssig gehalten. Es ergibt sich die Möglichkeit einer vereinfachten Montage, indem der Außenrahmen bei der Verbindung der Gehäuseteile in den entsprechenden Nutabschnitten eingeklemmt wird. Die klemmende formschlüssige Befestigung des Außenrahmens erzeugt neben einer lagegenauen Fixierung der Übertragungsklappe eine gute Dichtwirkung innerhalb der Anordnung und auch nach außen. Die entstehenden Klemmkräfte werden durch den Außenrahmen aufgenommen und von der Membran bzw. der Übertragungsklappe ferngehalten, so daß deren Freigängigkeit gewährleistet bleibt.In an advantageous embodiment, the outer frame is held positively in a groove on the edge of the pivot bearing opening. This results in the possibility of simplified assembly by the outer frame is clamped in the connection of the housing parts in the corresponding groove sections. The clamping positive locking attachment of the outer frame, in addition to a positionally accurate fixation of the transfer flap creates a good sealing effect within the arrangement and also to the outside. The resulting clamping forces are absorbed by the outer frame and kept away from the membrane or the transmission flap, so that their freedom of movement is ensured.

Ausführungsbeispiele der Erfindung sind im folgenden anhand der Zeichnung näher beschrieben. Es zeigen:

Fig. 1
eine schematische Längsschnittdarstellung einer Vorrichtung zur Geräuschübertragung nach dem Stand der Technik;
Fig. 2
eine Schnittdarstellung einer erfindungsgemäß ausgeführten Vorrichtung zur Geräuschübertragung mit einer Membran im Bereich der Schwenklageröffnung;
Fig. 3
eine Prinzipskizze mit der Membran nach Fig. 2 in Draufsicht und der Übertragungsklappe im Querschnitt;
Fig. 4
ein Variante der Anordnung nach Fig. 3 mit einem einteilig angeformten Steg zwischen Außen- und Innenrahmen der Membran.
Embodiments of the invention are described in more detail below with reference to the drawing. Show it:
Fig. 1
a schematic longitudinal sectional view of a device for noise transmission according to the prior art;
Fig. 2
a sectional view of an inventively executed device for noise transmission with a membrane in the region of the pivot bearing opening;
Fig. 3
a schematic diagram of the membrane of Figure 2 in plan view and the transfer flap in cross section.
Fig. 4
a variant of the arrangement of FIG. 3 with a one-piece integrally molded web between the outer and inner frame of the membrane.

Fig. 1 zeigt in einer geschnittenen Darstellung eine Vorrichtung zur Geräuschübertragung in einem Kraftfahrzeug nach dem Stand der Technik. Die Vorrichtung umfaßt ein Gehäuse 1 mit einer inneren Trennwand 2, wobei das Gehäuse 1 und die innere Trennwand 2 zwei separate Teilräume 3, 4 begrenzen. Ein Teil des Gehäuses 1 ist an ein Ansaugrohr 17 einer nicht dargestellten Brennkraftmaschine eines Kraftfahrzeuges angeformt, wobei der erste Teilraum 3 schalldruckübertragend mit dem Inneren des Ansaugrohres 17 verbunden ist. Der zweite Teilraum 4 ist fluidisch vom ersten Teilraum 3 mittels der Trennwand 2 getrennt.Fig. 1 shows a sectional view of a device for transmitting noise in a motor vehicle according to the prior art. The device comprises a housing 1 with an inner partition wall 2, wherein the housing 1 and the inner partition wall 2 define two separate subspaces 3, 4. A part of the housing 1 is formed on an intake pipe 17 of an internal combustion engine, not shown, of a motor vehicle, wherein the first compartment 3 is connected sound pressure transmitting with the interior of the intake pipe 17. The second subspace 4 is fluidly separated from the first subspace 3 by means of the partition wall 2.

Es ist eine Übertragungsklappe 6 vorgesehen, die die Trennwand 2 in einer Schwenklageröffnung 9 durchbricht und die um eine in der Trennwand 2 bzw. in der Schwenklageröffnung 9 liegende Schwenkachse 5 schwenkbar gelagert ist. Die Übertragungsklappe 6 reicht beidseitig von der Schwenkachse 5 unter Bildung eines geringen Spaltes bis nahe an die Innenwand des Gehäuses 1 heran und teilt dabei die beiden Teilräume 3, 4 in jeweilige Einzelräume 3', 3", 4', 4" auf. Der Einzelraum 4" des Teilraumes 4 ist mittels eines Austritts 19 schalldruckübertragend mit einer Wand des Innenraums vom nicht dargestellten Kraftfahrzeug oder direkt mit dem Innenraum verbunden.A transfer flap 6 is provided, which breaks through the dividing wall 2 in a pivot bearing opening 9 and which is pivotably mounted about a pivot axis 5 lying in the dividing wall 2 or in the pivot bearing opening 9. The transmission flap 6 extends on both sides of the pivot axis 5 to form a small gap to close to the inner wall of the housing 1 and divides the two subspaces 3, 4 in respective individual rooms 3 ', 3 ", 4', 4" on. The individual space 4 "of the subspace 4 is connected by means of an outlet 19 sound pressure transmitting with a wall of the interior of the motor vehicle, not shown, or directly to the interior.

Die Übertragungsklappe 6 ist in ihrer Neutralstellung gezeigt, von der ausgehend sie eine oszillierende Schwenkbewegung in Richtung eines Doppelpfeiles 28 ausführen kann. Der Schwenkbereich beträgt etwa 10°. Der statische Druck im Ansaugrohr 17 wirkt über den Spalt zwischen der Übertragungsklappe 6 und dem Gehäuse 1 im ersten Teilraum 3 beidseitig auf die Übertragungsklappe 6 und hat damit keine Auswirkung auf deren Auslenkung. Ein oszillierender Schalldruck im Ansaugrohr 17 wirkt in Richtung eines Pfeiles 18 auf die Übertragungsklappe 6, ohne den engen Spalt in einem wesentlichen Maß durchdringen zu können. Infolge des anliegenden oszillierenden Schalldruckes wird die Übertragungsklappe 6 in Schwingung versetzt. Die schwingende Übertragungsklappe 6 bewirkt im zweiten Teilraum 4 die Erzeugung eines gleichgearteten, um 180° versetzten Schalldruckes im Einzelraum 4", der mittels des Austrittes 19 im Inneren des Kraftfahrzeuges hörbar gemacht wird.The transfer flap 6 is shown in its neutral position, starting from which it can perform an oscillating pivoting movement in the direction of a double arrow 28. The swivel range is about 10 °. The static pressure in the intake pipe 17 acts on both sides of the transfer flap 6 via the gap between the transfer flap 6 and the housing 1 in the first subspace 3 and thus has no effect on the deflection thereof. An oscillating sound pressure in the intake pipe 17 acts in the direction of an arrow 18 on the transfer valve 6, without being able to penetrate the narrow gap to a significant degree. As a result of the applied oscillating sound pressure, the transfer flap 6 is set in vibration. The oscillating transmission flap 6 causes in the second subspace 4, the generation of a like-like, offset by 180 ° sound pressure in the individual room 4 ", by means of the exit 19 is made audible in the interior of the motor vehicle.

Die Übertragungsklappe 6 ist in der Trennwand 2 fluidisch dicht gelagert. Infolge der Abdichtung der beiden Teilräume 3, 4 gegeneinander in Verbindung mit dem Spalt zwischen der Übertragungsklappe 6 und dem Gehäuse 1 wirkt die Anordnung unabhängig vom statischen Druck im Ansaugrohr 17 und ist damit insbesondere für den Betrieb eines aufgeladenen Antriebsmotors beispielsweise in einem Saugrohrbereich zwischen einem Turbolader und dem Motor geeignet.The transfer flap 6 is mounted fluidically tight in the partition wall 2. As a result of the sealing of the two subspaces 3, 4 against each other in conjunction with the gap between the transfer flap 6 and the housing 1, the arrangement acts independently of the static pressure in the intake pipe 17 and is thus in particular for the operation of a supercharged drive motor, for example in a Saugrohrbereich between a turbocharger and the engine suitable.

Zur fluidischen Trennung der beiden Teilräume 3, 4 ist die Schwenklageröffnung 9 im Bereich der Schwenkachse 5 abgedichtet. Die Übertragungsklappe 6 weist dazu auf ihren beiden Oberflächen jeweils einen parallel zur Schwenkachse 5 verlaufenden Steg 24 auf. Die Trennwand 2 trägt an ihren Rändern 10 der Schwenklageröffnung 9 U-förmige Gummidichtungen 25. Das Gehäuse 1 ist mittels Flanschen 27 verschraubt. Es kann auch eine andere geeignete Verbindung wie Kleben oder Verschweißen vorteilhaft sein. Beim Montagevorgang bzw. bei der Verschraubung an den Flanschen 27 werden die Gummidichtungen 25 von den beiden Hälften der Trennwand 2 dichtend gegen den jeweiligen Steg 24 gepreßt. Die Dichtwirkung ist abhängig von der aufgebrachten Preßkraft, die ihrerseits in Verbindung mit der Steifigkeit der Gummidichtungen 25 die Schwenkbarkeit der Übertragungsklappe 6 beeinflußt bzw. beeinträchtigt.For the fluidic separation of the two subspaces 3, 4, the pivot bearing opening 9 is sealed in the region of the pivot axis 5. The transmission flap 6 has on its two surfaces in each case a parallel to the pivot axis 5 extending web 24. The partition wall 2 carries at its edges 10 of the pivot bearing opening 9 U-shaped rubber seals 25. The housing 1 is screwed by means of flanges 27. It may also be advantageous to use another suitable connection such as gluing or welding. During assembly or when screwing to the flanges 27, the rubber seals 25 are pressed by the two halves of the partition wall 2 sealingly against the respective web 24. The sealing effect is dependent on the applied compressive force, which in turn affects the pivotability of the transfer valve 6 in connection with the stiffness of the rubber seals 25 or impaired.

Nach Fig. 2 ist eine erfindungsgemäße Ausführung der Vorrichtung zur Schallübertragung vorgesehen, deren Grundprinzip anhand der Anordnung nach Fig. 1 erläutert ist. Das Gehäuse 1 besteht aus zwei Gehäusehälften 20, 21, an die die Trennwand 2 jeweils zur Hälfte einteilig angeformt ist. Die beiden Gehäusehälften 20, 21 sind an einem Flansch 22 miteinander verschraubt.2, an inventive embodiment of the device for sound transmission is provided, the basic principle based the arrangement of FIG. 1 is explained. The housing 1 consists of two housing halves 20, 21, to which the partition wall 2 is integrally formed in one half. The two housing halves 20, 21 are screwed together on a flange 22.

Die Übertragungsklappe 6 ist entlang ihrer umlaufenden Kante 7 in dem ebenfalls umlaufenden gummielastischen Rahmen 26 gehalten. Der Rahmen 26 weist dazu eine innenliegende Nut auf, in der die Übertragungsklappe 6 formschlüssig gehalten ist. Im Außenbereich ist der Rahmen 26 im Flansch 22 zwischen den beiden Gehäusehälften 20, 21 formschlüssig befestigt bzw. eingeklemmt. Die beiden Gehäusehälften 20, 21 sind an Schraublöchern 29 des Flansches 22 miteinander verschraubt und halten dabei den Rahmen 26.The transfer flap 6 is held along its peripheral edge 7 in the likewise encircling rubber-elastic frame 26. The frame 26 has for this purpose an internal groove in which the transfer flap 6 is held in a form-fitting manner. In the outer region of the frame 26 is in the flange 22 between the two housing halves 20, 21 positively secured or clamped. The two housing halves 20, 21 are screwed together at screw holes 29 of the flange 22 and hold the frame 26th

Der Rahmen 26 ist zweiteilig derart ausgeführt, daß sein Außenbereich am Gehäuse 1 und sein Innenbereich an der Übertragungsklappe 6 unter Bildung eines zwischenliegenden Spaltes 16 befestigt ist. Der Rahmen 26 bildet dabei ein Dichtelement 8 zwischen der umlaufenden Kante 7 der Übertragungsklappe 6 und der Innenwand des Gehäuses 1, wobei der Spalt 16 eine freie Verschwenkbarkeit der Übertragungsklappe 6 zuläßt.The frame 26 is designed in two parts such that its outer region is fastened to the housing 1 and its inner region to the transfer flap 6 to form an intermediate gap 16. The frame 26 forms a sealing element 8 between the peripheral edge 7 of the transfer flap 6 and the inner wall of the housing 1, wherein the gap 16 allows a free pivoting of the transfer flap 6.

Einander zugewandte Kanten von den beiden Hälften der Trennwand 2 liegen in einem Abstand zueinander und auch zur Schwenkachse 5 der Übertragungsklappe 6. Es ist dadurch eine Schwenklageröffnung 9 gegeben, die beidseitig der Übertragungsklappe 6 entlang ihrer Schwenkachse 5 einen Spalt 11 bildet. Der Spalt 11 ist jeweils durch die Oberfläche der Übertragungsklappe 6 sowie nach außen durch einen Rand 10 der Schwenklageröffnung 9 begrenzt. Der Rand 10 entspricht hier dem nach innen gewandten freien Ende des jeweiligen Abschnittes der Trennwand 2. Der Spalt 11 ist beidseitig der Übertragungsklappe 6 mittels einer Membran 12 druckdicht verschlossen.Mutually facing edges of the two halves of the partition wall 2 are at a distance from each other and also to the pivot axis 5 of the transfer flap 6. It is characterized given a pivot bearing 9, which forms a gap 11 on both sides of the transfer flap 6 along its pivot axis 5. The gap 11 is in each case through the surface of the Transmission flap 6 and limited to the outside by an edge 10 of the pivot bearing opening 9. The edge 10 here corresponds to the inwardly facing free end of the respective section of the dividing wall 2. The gap 11 is closed on both sides of the transfer flap 6 by means of a membrane 12 in a pressure-tight manner.

Die Membran 11 kann faltenbalgartig, wellig oder in anderer Weise räumlich ausgeformt sein und ist im gezeigten Ausführungsbeispiel eben. Auf ihrer der Übertragungsklappe 6 zugewandten Seite ist sie an einem Innenrahmen 14 gehalten und verläuft direkt entlang der Schwenkachse 5 auf der Außenseite der Übertragungsklappe 6. Durch die ebene Ausführung ist die Membran 12 in ihrer Ebene steif und fixiert die Übertragungsklappe 6 in der Membranebene bzw. in der Ebene der Trennwand 2.The membrane 11 may bellows-like, wavy or spatially formed in some other way and is flat in the embodiment shown. On its side facing the transfer flap 6, it is held on an inner frame 14 and extends directly along the pivot axis 5 on the outside of the transfer flap 6. Due to the planar design, the membrane 12 is stiff in its plane and fixes the transfer flap 6 in the membrane plane or in the plane of the partition 2.

Es kann auch zweckmäßig sein, eine Lagefixierung der Übertragungsklappe 6 mit einem Achszapfen oder dergleichen vorzunehmen. Bei einer räumlichen Ausformung der Membran 12 kann diese auch abseits der Schwenkachse 5 druckdicht mit der Übertragungsklappe 6 verbunden sein.It may also be expedient to perform a positional fixation of the transfer flap 6 with a journal or the like. In the case of a spatial configuration of the membrane 12, this can also be connected to the transfer flap 6 in a pressure-tight manner away from the pivot axis 5.

Die Membran 12 ist im Sinne der vorliegenden Erfindung als ein dünnwandiges, flächiges Gebilde definiert, welches quer zu seiner Ebene im wesentlichen nachgiebig ist. Je nach Anwendungsfall kann zur Erzielung der entsprechenden mechanischen Eigenschaften die Membran 12 aus einer Gummi-, Gewebe- oder Kunststoffolie oder auch aus einer Metallfolie bzw. einem dünnen Blech gebildet sein.The membrane 12 is defined in the context of the present invention as a thin-walled, planar structure which is substantially yielding transversely to its plane. Depending on the application, the membrane 12 may be formed from a rubber, fabric or plastic film or from a metal foil or a thin sheet to achieve the corresponding mechanical properties.

Die quer zu ihrer Ebene nachgiebige Membran 12 erlaubt trotz ihrer lateralen Fixierung der Übertragungsklappe 6 deren Schwenkbewegung in Richtung des Doppelpfeiles 28. Die Membran 12 erfährt dabei im wesentlichen eine Biegeverformung quer zu ihrer Membranebene. In dieser Richtung ist die Membran 12 im wesentlichen weich. Es kann auch zweckmäßig sein, die Membran 12 mit einer definierten Reststeifigkeit in Biegerichtung zu versehen. In Verbindung mit einer kleinflächigen Ausbildung des Spaltes 11 kann die Membran 12 auch zur Lagefixierung der Übertragungsklappe 6 quer zur Membranebene herangezogen werden. Dabei kann ggf. auf die Ausbildung separater Achsstummel oder anderer Elemente zur Führung der Schwenkbewegung verzichtet werden.Despite its lateral fixation of the transfer flap 6, the membrane 12, which is flexible transversely to its plane, permits its pivotal movement in the direction of the double arrow 28. The membrane 12 essentially undergoes a bending deformation transversely to its membrane plane. In this direction, the membrane 12 is substantially soft. It may also be expedient to provide the membrane 12 with a defined residual rigidity in the bending direction. In conjunction with a small-area formation of the gap 11, the membrane 12 can also be used for fixing the position of the transfer flap 6 transversely to the membrane plane. It may be possible to dispense with the formation of separate stub axle or other elements for guiding the pivoting movement.

Die Membran 12 ist gehäuseseitig an einem Außenrahmen 13 gehalten, der seinerseits in einer Nut 23 am Rand 10 der Schwenklageröffnung 9 und damit an der Trennwand 2 formschlüssig befestigt ist. Bei der Verschraubung der beiden Gehäusehälften 20, 21 am Flansch 22 wird neben dem Rahmen 26 auch die Baueinheit aus der Übertragungsklappe 6 mit der Membran 12 und dem Außenrahmen 13 klemmend befestigt. Die Klemmkraft der Verschraubung am Flansch 22 bewirkt eine druckdichte Einklemmung des Außenrahmens 13 in der Nut 23.The membrane 12 is on the housing side held on an outer frame 13, which in turn is positively secured in a groove 23 at the edge 10 of the pivot bearing opening 9 and thus on the partition wall 2. When screwing the two housing halves 20, 21 on the flange 22, the assembly of the transfer flap 6 with the membrane 12 and the outer frame 13 is attached by clamping next to the frame 26. The clamping force of the screw on the flange 22 causes a pressure-tight clamping of the outer frame 13 in the groove 23rd

Fig. 3 zeigt als Prinzipskizze einen Querschnitt durch die Übertragungsklappe 6 im Bereich der Schwenkachse 5, wobei die gewählte Ansicht auch eine Draufsicht der Membran 12 darstellt. Es ist zu erkennen, daß im gezeigten Ausführungsbeispiel der Spalt 11 und auch die den Spalt 11 verschließende Membran 12 ringförmig um den Querschnitt der Übertragungsklappe 6 herumgeführt ist. Die Membran 12 ist dabei innenseitig an dem Innenrahmen 14 und außenseitig an dem Außenrahmen 13 befestigt, wozu angedeutete Befestigungspunkte 30 vorgesehen sind. Der Innenrahmen 14 ist druckdicht mit der Übertragungsklappe 6 und der Außenrahmen 13 druckdicht mit dem Gehäuse 1 (Fig. 2) verbunden. Darüber hinaus ist die Membran 12 druckdicht am Außen- und Innenrahmen 13, 14 befestigt, wodurch insgesamt der umlaufende Spalt 11 hermetisch abgedichtet ist.3 shows a schematic diagram of a cross section through the transfer flap 6 in the region of the pivot axis 5, wherein the selected view also represents a top view of the membrane 12. It can be seen that in the illustrated embodiment, the gap 11 and the gap 11 closing Membrane 12 is guided around the cross-section of the transfer flap 6 annular. The membrane 12 is fastened to the inner frame 14 on the inside and to the outer frame 13 on the outside, for which purpose indicated attachment points 30 are provided. The inner frame 14 is pressure-tight with the transmission flap 6 and the outer frame 13 pressure-tight manner with the housing 1 (Fig. 2). In addition, the membrane 12 is pressure-tightly secured to the outer and inner frames 13, 14, whereby a total of the circumferential gap 11 is hermetically sealed.

Das Material der Membran 12 weist eine derartige Steifigkeit auf, das in Verbindung mit der ebenen Ausgestaltung der Membran 12 die Übertragungsklappe 6 in jeder lateralen Richtung in der gezeigten Membranebene genau lagefixiert ist, dabei jedoch eine Verschwenkbarkeit um die Schwenkachse 5 zuläßt. Auf die Anordnung eines separaten Achsbauteiles oder dgl. wurde verzichtet.The material of the membrane 12 has such a rigidity that, in conjunction with the flat configuration of the membrane 12, the transfer flap 6 is exactly fixed in position in every lateral direction in the membrane plane shown, but permits a pivotability about the pivot axis 5. On the arrangement of a separate axle component or the like was omitted.

Fig. 4 zeigt eine Variante der Anordnung nach Fig. 3, bei der beidseitig der Stirnkanten der Übertragungsklappe entlang der Schwenkachse 5 verlaufend je ein torsionselastischer Steg 15 vorgesehen ist. Der torsionselastische Steg 15 verläuft von der Stirnkante der Übertragungsklappe 6 bzw. von dem dort liegenden Abschnitt des Innenrahmens 14 bis zum Außenrahmen 13. Die beiden torsionselastischen Stege 15 bilden Achselemente zur Führung der Übertragungsklappe 6 bei ihrer Schwenkbewegung um die Schwenkachse 5, indem sie bei der entsprechenden Schwenkbewegung ebenso wie der angrenzende Bereich der Membran 12 einer Torsionsverformung unterzogen werden.Fig. 4 shows a variant of the arrangement according to Fig. 3, in which both sides of the end edges of the transfer flap along the pivot axis 5 each extending a torsionally elastic web 15 is provided. The torsion-elastic web 15 extends from the end edge of the transmission flap 6 and from the lying there portion of the inner frame 14 to the outer frame 13. The two torsion-elastic webs 15 form axle elements for guiding the transmission flap 6 in its pivotal movement about the pivot axis 5, by at the corresponding pivotal movement as well as the adjacent region of the membrane 12 are subjected to a torsional deformation.

Gleichzeitig ist durch die Stege 5 aufgrund ihrer Biege- und Quersteifigkeit eine verbesserte Lagefixierung der Übertragungsklappe 6 senkrecht zur Ebene der Membran 12 gegeben.At the same time an improved positional fixation of the transfer flap 6 is perpendicular to the plane of the membrane 12 by the webs 5 due to their bending and transverse stiffness.

Der Innenrahmen 14, die Stege 15 und der Außenrahmen 13 sind im gezeigten Ausführungsbeispiel einteilig als spritzgegossenes Kunststoffbauteil ausgeführt. Es kann auch zweckmäßig sein, zusätzlich die Membran 12 und auch die Übertragungsklappe 6 einteilig mit den vorgenannten Bauteilen beispielsweise auf dem Wege des Spritzgießens herzustellen.The inner frame 14, the webs 15 and the outer frame 13 are made in one piece as an injection-molded plastic component in the embodiment shown. It may also be expedient to additionally produce the membrane 12 and also the transfer flap 6 in one piece with the abovementioned components, for example by way of injection molding.

Claims (8)

  1. Apparatus for transmitting sound in an automotive vehicle, the said apparatus including a housing (1) with an inner partition wall (2), wherein two separate part areas (3, 4) are defined by the housing (1) and the inner partition wall (2), with a transmission flap (6), which is guided through a pivot bearing opening (9) of the partition wall (2) and is mounted in the region of the pivot bearing opening (9) so as to be pivotable about a pivotal axis (5), through the intermediary of the said transmission flap the two part areas (3, 4) are divided, and wherein the first part area (3) is connected to an intake tube (17) of an internal combustion engine and the second part area (4) is connected in a manner capable of transmitting sound to an interior space of the automotive vehicle, characterised in that a gap (11) is provided between an edge (10) of the pivot bearing opening (9) and the transmission flap (6), the said gap being closed in a pressure-tight manner through the intermediary of a diaphragm (12).
  2. Apparatus according to claim 1, characterised in that the diaphragm (12) is connected to the transmission flap (6) in a pressure-tight manner along the pivotal axis (5).
  3. Apparatus according to claim 1 or 2, characterised in that the gap (11) and the diaphragm (12) that closes the gap (11) is guided in an annular manner around the cross-section of the transmission flap (6).
  4. Apparatus according to one of claims 1 to 3, characterised in that the diaphragm (12) is retained on the housing side on an outer frame (13).
  5. Apparatus according to one of claims 1 to 4, characterised in that the diaphragm (12) is retained on the flap side on an inner frame (14).
  6. Apparatus according to claims 4 and 5, characterised in that a torsionally resilient web (15) that extends from the inner frame (14) to the outer frame (13) is provided in the region of the pivotal axis (5).
  7. Apparatus according to claim 6, characterised in that the inner frame (14) and the outer frame (13) are joined through the intermediary of the web (15) and more especially are integrally formed together with the web (15).
  8. Apparatus according to one of claims 4 to 7, characterised in that the outer frame (13) is retained in a form-fitting manner in a groove (23) at he edge (10) of the pivot bearing opening (9).
EP05107786A 2004-08-28 2005-08-25 Device for noise conduction in a motor vehicle Not-in-force EP1630789B1 (en)

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DE102004041699A DE102004041699A1 (en) 2004-08-28 2004-08-28 Device for transmitting noise in a motor vehicle

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EP1630789A1 EP1630789A1 (en) 2006-03-01
EP1630789B1 true EP1630789B1 (en) 2007-02-07

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ATE353462T1 (en) 2007-02-15
US20060042873A1 (en) 2006-03-02
US7464788B2 (en) 2008-12-16
DE102004041699A1 (en) 2006-03-02
DE502005000365D1 (en) 2007-03-22
EP1630789A1 (en) 2006-03-01

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