AIR EXTRACTION DEVICE, VIBRATION DAMPER AND METHOD FOR ATTACHING A VIBRATION-INDUCING PART TO A WALL AS WELL AS THE USE OF A VIBRATION DAMPER

Description

[0001] The invention relates to an air extraction device comprising a housing with at least one wall and at least one vibration-inducing part. The invention further relates to a vibration damper for use in the air extraction device, a method for attaching a vibration-inducing part to a wall, and the use of a vibration damper.

[0002] US 9,958,025 B2 describes a vibration-damping component for mounting a fan. This component uses a rubber sleeve, which is inserted into a mounting plate, to decouple a bolt from vibration.

[0003] EP 0 668 650 A1 discloses an arrangement for the vibration-damped mounting of an electric motor, in particular a fan motor.

[0004] DE 970 885 C discloses an elastic suspension of an electric motor driving a blower, in particular for vacuum cleaners.

[0005] EP 2 466 147 A1 discloses another known vibration-damped mounting of an electric motor.

[0006] A disadvantage of the vibration damper known from the prior art is that it has a very large number of parts and is therefore expensive, especially in assembly, and furthermore only provides insufficient vibration decoupling between the vibration-indicating blower and a wall.

[0007] The object of the present invention is to provide an improved air extraction device, an improved vibration damper, and an improved method for attaching a vibration-inducing part to a wall, which in particular overcomes the disadvantages of the prior art. In particular, the object of the invention is to provide a space-saving method for mounting a vibration-inducing part that effects vibration decoupling or vibration damping in an air extraction device.

[0008] The object is achieved according to the invention by means of an air extraction device comprising a housing with at least one wall and at least one vibration-inducing part, wherein the air extraction device comprises at least one vibration damper which can be arranged between the vibration-inducing part and the wall, wherein the at least one vibration damper comprises an elastomeric body, wherein the body comprises a plurality of first recesses and a plurality of second recesses, wherein the elastomeric body has a cylindrical or prismatic central part and a plurality of features, wherein the features are arranged radially outside on the outer surface of the central part, wherein the body has at least a first side and a second side opposite it, wherein at least one surface of the central part of the first side and the second side is offset to a surface of at least one feature of the same side.wherein the central part projects beyond the features on the first side and the features project beyond the central part on the second side, and wherein the second recesses are arranged in the features, wherein the first recesses are designed to receive first connecting means for a connection to the at least one wall and the second recesses are designed to receive second connecting means for a connection to the vibration-inducing part.

[0009] Furthermore, the object of the invention is achieved by means of a vibration damper for use in the air extraction device comprising an elastomeric body, wherein the body comprises a plurality of first recesses and a plurality of second recesses, wherein the elastomeric body has a cylindrical or prismatic central part and a plurality of projections, wherein the projections are arranged radially outside on the central part on its lateral surface, wherein the body has at least a first side and a second side opposite it, wherein at least one surface of the central part of the first side and / or the second side is offset from a surface of at least one projection of the same side, wherein the central part projects beyond the projections on the first side and the projections project beyond the central part on the second side, and wherein the second recesses are arranged in the projections.wherein the first recesses are designed to accommodate first fastening means for connection to at least one wall and the second recesses are designed to accommodate second fastening means for at least one vibration-inducing part.

[0010] Furthermore, the problem is solved according to the invention by means of a method for attaching a vibration-inducing part to a wall comprising Providing a vibration damper, attaching first fastening means to at least one wall of a housing of an air extraction device and in first recesses of the vibration damper, attaching second fastening means to at least one vibration-inducing part and in second recesses of the vibration damper.

[0011] An air extraction device is proposed, comprising a housing with at least one wall and at least one vibration-inducing element. The vibration-inducing element is, in particular, a motor, preferably coupled to a fan wheel. Either the motor and / or the fan wheel may exhibit an imbalance that could potentially lead to undesirable vibrations. To decouple these vibrations from the housing of the air extraction device, it is proposed that the air extraction device include at least one vibration damper, which can be arranged between the vibration-inducing element and the wall. The elastomeric body has a cylindrical or prismatic central section and a plurality of features, wherein the features are arranged radially outside the central section and the secondary recesses are arranged on the outer surface of the features.The body has at least one first side and a second side opposite it, wherein at least one surface of the central portion of the first and second sides is offset from a surface of at least one feature on the same side, the central portion projecting beyond the features on the first side and the features projecting beyond the central portion on the second side. The at least one vibration damper comprises an elastomeric body, the body comprising a plurality of first recesses and a plurality of second recesses. The first recesses are configured to receive first attachment means for connection to the at least one wall. The second recesses are configured to receive second attachment means for connection to the vibration-inducing part.

[0012] The air extraction device is preferably designed as a range hood that can be associated with a cooktop. Preferably, cooking fumes can be extracted by means of the air extraction device. In one embodiment, the air extraction device is arranged in a range hood that can be positioned above a cooktop. In another embodiment, the air extraction device is arranged below the cooktop, in particular such that cooking fumes can be extracted from below the cooktop.

[0013] The vibration damper advantageously decouples the vibration-inducing part from the housing wall and thus from the housing itself. In particular, the vibration damper achieves vibration decoupling between the wall and the vibration-inducing part.

[0014] Preferably, the cooking fumes are drawn in by means of the fan wheel, which is driven by the motor. In one embodiment, the motor and fan wheel may be designed such that either the motor and / or the fan wheel, or their assembly, are not precisely balanced and vibrate during operation of the air extraction device. If these vibrations are transmitted to the housing of the air extraction device, unwanted noise is generated. The proposed vibration damper in the air extraction device decouples the vibrations of the vibration-inducing component, i.e., the motor and fan wheel, and thus prevents noise generation in a kitchen where the air extraction device is used.

[0015] The vibration damper comprises an elastomeric body. Furthermore, the elastomeric body has recesses. These recesses are designed to accommodate, in particular, first fastening elements. The first fastening elements are designed to connect the elastomeric body to the housing wall. For example, the first fastening elements are designed as screws or bolts. In one embodiment, the first fastening elements incorporate vibration-damping elements, such as rubber dampers. The vibration-damping elements can be designed, in particular, as rubber-metal vibration dampers or rubber-metal buffers.

[0016] The first recesses are arranged in a substantially circular pattern within the body. Specifically, the centers or central axes of the first recesses are arranged on a first circumference, which is, for example, associated with a first surface of a first side of the elastomeric body, preferably the central section. Preferably, the first circumference is concentric with a central axis of the central section. In particular, all first recesses, especially their centers, are equidistant from a point, preferably a center point, the central axis, and / or a geometric center of gravity of the elastomeric body. It is further preferably provided that the first recesses are uniformly distributed, particularly on the first circumference. This ensures, in particular, that the elastomeric body bears against the wall with uniform contact pressure.

[0017] The term "essentially" indicates a tolerance range that is acceptable to a person skilled in the art from an economic and technical point of view, so that the corresponding feature is still recognizable as such or is realized.

[0018] In a further embodiment, it is provided that the arrangement of the first recesses is adapted to the geometric specifications of the wall.

[0019] In a preferred embodiment, the elastomeric body has approximately two to ten, preferably approximately two to four, more preferably approximately three to four, and more preferably exactly four first recesses. In a further embodiment, a plurality of first recesses are provided, wherein only approximately three to four, more preferably exactly three or exactly four of these first recesses accommodate a first connecting element.

[0020] Where the term "approximately" is used in conjunction with values ​​or ranges of values ​​within the scope of the invention, it refers to a tolerance range that the person skilled in the art considers customary in this field; in particular, a tolerance range of + / - 20%, preferably + / - 10%, and more preferably + / - 5%, is provided. Where different ranges of values, for example, preferred and more preferred ranges of values, are specified in the present invention with respect to identical features, the lower and upper limits of the different ranges of values ​​can be combined with one another.

[0021] The elastomeric body further comprises second recesses. These second recesses are designed to accommodate second fastening means. The second fastening means are, in particular, means for connecting the elastomeric body to the vibration-inducing component, especially a motor. Preferably, the second fastening means are designed as screws or bolts. In one embodiment, the second fastening means incorporate vibration-damping elements, such as rubber dampers.

[0022] In one embodiment, the second recesses are arranged essentially circularly within the elastomeric body. Preferably, the centers of the second recesses lie on a second circumference, which is, for example, located at least partially on a first surface of a first side of the elastomeric body and, in one embodiment, at least on one of its features. In particular, all second recesses, especially their centers, are equidistant from a point, preferably a center point, the central axis, and / or a geometric center of gravity of the elastomeric body. Preferably, the second circumference is concentric with the central axis of the middle section. More preferably, the second circumference is concentric with the first circumference. Furthermore, it is provided that the second recesses are uniformly distributed within the elastomeric body, particularly on the second circumference.In one embodiment, the second circumference on which the second recesses are arranged is identical to, or has the same radius as, the first circumference on which the first recesses are arranged. In particular, all second recesses and all first recesses, especially their centers, are equidistant from a point, preferably a center point, the central axis, and / or a geometric center of gravity of the elastomeric body. In an alternative, preferred embodiment, the second circumference on which the second recesses are arranged is larger, or has a larger radius, than the first circumference on which the first recesses are arranged.In particular, all secondary recesses, especially their centers, are spaced further away from a point, preferably a center point, the central axis, and / or a geometric center of gravity of the elastomeric body than the first recesses, especially their centers. In an alternative third embodiment, the circumference of the circle on which the secondary recesses are arranged is smaller, or has a smaller radius, than the circumference of the circle on which the first recesses are arranged. In particular, all secondary recesses, especially their centers, are spaced further away from a point, preferably a center point, the central axis, and / or a geometric center of gravity of the elastomeric body than the secondary recesses, especially their centers. The arrangement of the secondary recesses is preferably adapted to the specifications of the vibration-inducing component.In a preferred embodiment, the elastomeric body has approximately two to ten, preferably approximately two to four, more preferably approximately three to four, and more preferably exactly three secondary recesses. The advantage of three recesses, and thus also of providing three secondary connection means, is that stresses in the vibration-inducing part are reduced by the connection of the elastomeric body. In an exemplary embodiment, the elastomeric body has exactly three recesses, which are preferably evenly distributed on the second circumference, which is more preferably arranged concentrically to the central axis of the middle part. In a further embodiment, a plurality of secondary recesses are provided, wherein only approximately three to four, and more preferably exactly three, of these recesses accommodate a secondary connection means.In a further embodiment, it is provided that the second recesses, in particular the exactly three second recesses, are arranged on an equilateral triangle, in particular in the edges of an equilateral triangle.

[0023] In one embodiment, the second recesses and / or the first recesses are configured as bores. In another embodiment, the first recesses and / or the second recesses are configured as elongated slots. Preferably, the first recesses and / or the second recesses are completely surrounded by a material of the elastomeric body.

[0024] According to the invention, the elastomeric body has a first side and a second side opposite it. It is particularly preferred that the first side be associated with the wall of the housing of the air extraction device. It is further preferred that the second side be associated with the vibration-inducing part. In one embodiment, the body is essentially circular or ring-shaped. In a particularly preferred embodiment, the elastomeric body has a central section. The central section can be circular, rectangular, and / or adapted to the wall and / or the vibration-inducing part. In particular, the central section is adapted to a surface finish or a geometric shape defined by the wall and / or the vibration-inducing part. Preferably, the central section is ring-shaped in a top view.For the purposes of the invention, a ring shape is understood to be a surface located between two geometric figures that are arranged essentially concentrically. In particular, a ring shape is a circular ring. Furthermore, for the purposes of the invention, when referring to a ring shape of the body or the central part, it encloses a hollow cylinder, which in particular has a height that is less than its outer radius. A cylinder in general can also be understood to be a prism. Thus, in an exemplary embodiment, it can be provided that the body, and more preferably the central part, is designed as a prism, which preferably has a central recess. The central part preferably has a central recess that is, for example, circular, oval, star-shaped, or rectangular. The central recess is particularly continuous and more preferably circular.The advantage of the central recess is that the middle section can deform more under vibration than a solid material design. This has a positive effect on the damping properties of the middle section.

[0025] In a further embodiment, the middle section is provided with the first set of recesses. In a further embodiment, the middle section is provided with the second set of recesses. In a preferred embodiment, the middle section is provided with only the first set of recesses.

[0026] Furthermore, in one embodiment, the central part has a first surface. The first surface is preferably located on the first side. More preferably, the first surface is bounded by a circumferential first edge. In another embodiment, the first surface is essentially flat. In another embodiment, the first surface is essentially curved. In another embodiment, the first surface has a structure, for example, a pattern, a roughening, and / or a matting. In another embodiment, the first surface is smooth. In another embodiment, the central part has a second surface. The second surface is preferably located on the second side of the central part. The second surface is preferably bounded by a circumferential second edge.It is further preferred that the second surface is essentially flat or curved. In another embodiment, the second surface has a structure, for example, a pattern, a roughening, and / or a matting. In yet another embodiment, the second surface is smooth. Furthermore, in one embodiment, the central part has a lateral surface. This lateral surface is bounded by the first and second surfaces, i.e., located between them. It is further provided that the lateral surface is bounded by the first edge bounding the first surface and the second edge bounding the second surface.

[0027] In a further embodiment, the elastomeric body is provided to have at least one feature, more preferably a plurality of features. Preferably, the elastomeric body has approximately two to ten features, more preferably approximately two to four features, more preferably approximately three to four features, and more preferably exactly three features. In a further embodiment, the features are provided to have the second recesses. Furthermore, in a further embodiment, each feature is provided to have a second recess, more preferably exactly one second recess. According to the invention, the body has a central part and a plurality of features, wherein the second recesses are arranged in the features. The features preferably have an outer contour that can be described as cylindrical, prismatic, and / or cuboid.In another embodiment, the feature has an arbitrary outer contour. The features are preferably arranged on the lateral surface of the central part. Preferably, the lateral surface of the elastomeric body comprises the lateral surfaces of the feature and the lateral surface of the central part. For example, the feature has a substantially cylindrical basic shape. Preferably, a lateral surface of the cylindrical basic shape borders the lateral surface of the central part; more preferably, the basic shape of the feature is tangent to the central part, in particular to its lateral surface. For example, the feature includes a material addition that connects the cylindrical basic shape to the central part. Preferably, the material addition provides a transition from a portion of the lateral surface of the feature to a lateral surface of the central part.Preferably, at least part of the surface area of ​​the basic shape forms the feature, and a surface area of ​​the added material forms a surface area of ​​the feature.

[0028] In one embodiment, the features transition into the lateral surface of the central part or exhibit a material transition. Preferably, a radius is provided between the lateral surface of the central part and the lateral surface of the features. In a further embodiment, the lateral surface of the features and the lateral surface of the central part are at an angle to each other, so that an edge is formed.

[0029] In one embodiment, the features are provided that the components have constrictions, preferably comprising a reduction in the cross-section of the features. The constriction of a feature can be a reduction in material. Preferably, the constriction is located at the connection point to the central part; more preferably, in one embodiment, the constriction is arranged between the connection point to the central part and the second recess. For example, the constriction is formed by the addition of material. The advantage of the constriction is that it increases the damping factor for the vibrations introduced into the vibration damper and also allows for optimal stress flow. Furthermore, the constriction can be designed as a predetermined buckling point to, for example, compensate for tolerances in the connection of the vibration damper to the shrinkage-inducing part.Advantageously, the constrictions reduce stresses between the vibration-inducing part and the vibration damper in the assembled state.

[0030] In a preferred embodiment, the feature has a first surface. This first surface is located, in particular, on the first side. Furthermore, the first surface is bounded by a circumferential first edge of the feature and / or a connection point to the central part, or by the lateral surface of the central part. It is further preferred that the feature has a second surface. Preferably, the second surface is located on the second side of the feature. Further preferred, the second surface is bounded by a circumferential second edge of the feature and / or by a connection point to the central part, or by the lateral surface of the central part. Both the first and second surfaces can be flat and / or curved.In a further embodiment, the first and / or second surface has a structure, for example a pattern, a roughening, and / or a matting. In another embodiment, the first and / or second surface is smooth. The lateral surface is arranged between the first and second surfaces of the feature. In particular, the lateral surface is bounded by the circumferential edges of the first and / or second surface and / or by the lateral surface of the central part.

[0031] In one embodiment, the elastomeric body has at least a first side and a second side opposite it, wherein a first side of the feature and a first side of the central part are arranged on the first side of the body, and a second side of the central part and a second side of the feature are arranged on the second side of the body. According to the invention, at least a first and / or second surface of the central part of the first side and the second side is offset from a surface of at least one feature, preferably all features, on the same side. In particular, the surfaces of the first side of the central part and the first side of the feature lie on planes that are not identical but parallel to each other.In particular, the surfaces of the second side of the central part and the surfaces of the second side of the feature lie on planes that are preferably not identical but parallel to each other. More preferably, the surfaces of the first side of the features lie on the same plane. In a preferred embodiment, the first surface of the central part is set apart from the first surface of the feature. For the purposes of the invention, a set-off arrangement of the surfaces means that the first surface of the central part and the first surface of the feature, and / or the second surface of the central part and the second surface of the feature, do not lie in the same plane and are more preferably arranged in a stepped configuration relative to each other.For example, the first surface of the central part is positioned higher than the first surface of the feature, particularly if the first side faces upwards. Furthermore, by way of example, the second surface of the feature can be positioned higher than the second surface of the central part, particularly if the second side faces upwards. In a preferred embodiment, the first surface of the feature is positioned, and in particular, is set back behind the first surface of the central part, such that it does not contact the wall when installed. Even more preferably, the first surface of the central part is positioned so that, even under strong vibration or high-amplitude oscillation, the feature does not contact the wall.The design is preferably such that, in its installed state, it is spaced away from the wall.

[0032] The advantage of the recessed section is that introduced vibrations are dampened better than in designs where the recesses have surfaces that are essentially flush with that of the central section. Vibrations introduced into the recesses are also dampened better than in designs where the recesses have surfaces that are essentially flush with that of the central section.

[0033] In a further preferred embodiment, the second surface of the central part is set back from the second surface of the component. Preferably, the second surface of the central part is set back from the second surface of the component in such a way that the second surface of the central part does not contact the vibration-inducing component when installed. In particular, the second surface of the central part does not come into contact with the vibration-inducing component even when strong vibrations are introduced into the vibration damper or the second surface of the component.

[0034] In an exemplary embodiment, the body has features on the lateral surface of the central part, in particular three features. According to the invention, these features have, for example, a cylindrical basic shape and project beyond the central part on the second side. On the first side, the features are arranged on the central part such that the first surface of the feature is set back from the first surface of the central part – thus, according to the invention, the central part projects beyond the features on the first side. The cylindrical basic shape of the feature is tangent to the lateral surface of the central part, and a material allowance between the cylindrical basic shape of the feature and the lateral surface of the central part ensures a secure connection between the feature and the central part. In particular, the material allowance is part of the feature.

[0035] The material of the elastomeric body is preferably selected from the group consisting of rubber, acrylonitrile butadiene rubber, elastomer, and / or silicone. In particular, the material of the elastomeric body has a hardness in the range of approximately Shore A 75 to approximately Shore A 100, preferably approximately Shore A 90.

[0036] In a further embodiment, the elastomeric body is provided to have a layered structure. In one embodiment, the layered structure can be configured such that layers of different hardness are arranged one after the other. In particular, a layering is provided in the direction from the first side, facing the wall, to the second side, facing the vibration-inducing part. In a further embodiment, the layers are provided to have a different hardness than the central part.

[0037] It is particularly preferred that the elastomeric body is constructed in one piece. In particular, it is preferred that the central part and the contour are formed in one piece. Furthermore, it is preferred that the elastomeric body is molded or cast in a single production step. In a further embodiment, it is preferred that the elastomeric body is post-processed by machine.

[0038] In one embodiment, bushings can be arranged in the recesses. Preferably, bushings are arranged in the first recesses. More preferably, bushings are arranged in the second recesses. In one embodiment, it is provided that bushings are arranged at least partially in the first recesses and / or in the second recesses. The bushings can be overmolded by the elastomeric body, i.e., formed as a material bond. In an alternative, preferred embodiment, the bushings are designed to be insertable into the body. In particular, the bushings are detachably arranged in the recesses. The bushings are designed such that they are formed from a material selected from the group consisting of metal, in particular aluminum, plastic, and / or rubber. In particular, the bushings have a higher degree of hardness than the elastomeric body.The bushings are specifically designed for the force transmission of the connecting means, so that the elastomeric body can be attached to the wall and / or the vibration-inducing part by means of the connecting means which introduce a force into the bushings.

[0039] In one embodiment, at least a number of the bushings protrude from at least one surface. Preferably, the bushings, which are arranged particularly in the first recesses, protrude beyond a second surface of the central part. In particular, the bushings have a T-shaped cross-section. More preferably, the T-shaped end of the bushings is designed as a bearing. Preferably, the T-shaped end is a collar. It is further preferably that the T-shaped bushings are secured against slipping out of the elastomeric body. More preferably, the bushings of the first recess are designed as threaded bushings into which bolts or screws can preferably be screwed.

[0040] In a further embodiment, the bushings do not protrude beyond any surface of the elastomeric body. Preferably, the bushings arranged in the second recesses are designed to be flush with the first and / or second surface of the feature.

[0041] In a further embodiment, the bushings are designed as vibration dampers. In a preferred embodiment, the vibration-damping design of the bushings is implemented within the first and / or the second recesses. Preferably, the bushing comprises a vibration-damping material that interacts with the material of the elastomeric body. In one embodiment, the vibration-damping material has a lower degree of hardness than the material of the elastomeric body. For example, the bushing can comprise a plurality of materials, wherein at least one first material is harder than that of the elastomeric body and a second material is softer than that of the elastomeric body.

[0042] In an exemplary embodiment, the elastomeric body comprises a cylindrical central section, in particular with a central recess through which the central axis passes, on which a number, preferably three, projections are arranged radially outwards. The central section is thus preferably described as annular in a top view or as a three-dimensional ring cylinder. Preferably, the projections are evenly distributed on a lateral surface of the central section and are further preferably materially bonded to the central section. The projections are preferably substantially cylindrical. In particular, a portion of the lateral surface of the projections is connected to the lateral surface of the cylindrical central section of the elastomeric body via a rounded transition area. Preferably, the surfaces of the projections are set apart from those of the central section.Preferably, the features on the second side of the elastomeric body project longitudinally beyond the second side of the central section. Preferably, the central section projects beyond the first side of the features on the first side of the elastomeric body. The central section has a number, preferably three, of first recesses evenly distributed around a central axis of the central section, which preferably extend completely through the central section on a first circumference parallel to the central axis. The first recesses are provided for connecting the elastomeric body to a wall. Each feature has a second recess, which is preferably arranged on a second circumference that has a larger radius than the first circumference.

[0043] An exemplary embodiment of the air extraction device comprises a housing in which a vibration-inducing component, designed as a motor, is arranged. Preferably, a fan wheel is connected to the motor and driven by it. The vibrations induced by the motor and the fan wheel are dampened towards the housing by a vibration damper. In this exemplary embodiment, the vibration damper is designed as a body with an annular central section and has prismatic, preferably cylindrical, projections arranged on the outer surface of the central section. Three projections are arranged on the outer surface, each with exactly one additional recess. The annular central section further comprises approximately four recesses evenly distributed within the central section.The features are arranged in the corners of an equilateral triangle, so that the connection to the vibration-inducing part or the motor can be uniform and, in particular, stress-free.

[0044] As an example, the vibration damper also features bushings arranged in the recesses. The first recesses contain T-shaped threaded bushings with a collar. The collar prevents the bushing from slipping out, particularly when a first fastening element is screwed into the bushing. The fastening elements in the bushings of the first recesses connect the vibration damper to the wall of the air extraction device's housing. The second recesses contain, for example, bushings without threads. Second fastening elements, such as screws, are inserted through these bushings. These second fastening elements are screwed into the vibration-inducing component, the motor or its housing, preferably with the screw head resting on the bushing on the first side.In one embodiment, a washer is provided, which is arranged between the first surface of the feature or the bushing and the screw head. The vibration damper is connected to the vibration-inducing part by force transmission from the screw head via the bushing.

[0045] Furthermore, a vibration damper for use in the air extraction device described above is proposed. This damper comprises an elastomeric body. The body includes a plurality of first recesses and a plurality of second recesses, wherein the elastomeric body has a cylindrical or prismatic central section and a plurality of projections, the projections being arranged radially outside the central section and containing the second recesses on its lateral surface. The body has at least one first side and a second side opposite it, wherein at least one surface of the central section of the first side and / or the second side is offset from a surface of at least one projection on the same side, the central section projecting beyond the projections on the first side and the projections projecting beyond the central section on the second side.The first recesses are designed to receive first fastening elements for connection to at least one wall. The second recesses are designed to receive second fastening elements for connection to at least one vibration-inducing part. Preferably, in one embodiment, bushings are arranged in the first and / or the second recesses. In a further embodiment, the bushings are designed as vibration dampers.

[0046] In an exemplary embodiment of the vibration damper, the damper has a circular central section with a central recess that is round or circular in shape. On a circumference arranged on a first surface of a first side of the central section, continuous recesses, in particular four first recesses, are formed, extending to a second, opposite surface of the central section. Each first recess contains a bushing. The bushings in the first recesses are preferably designed such that they have a collar on the second side, facing a motor, giving them a T-shaped cross-section. This allows the T-shaped bushings to form a bearing, and force is introduced into the elastomeric body of the vibration damper via connecting elements that can be arranged within the bushings.On the lateral surface of the central part of the elastomeric body, features, preferably three, are arranged, which are further preferably materially bonded to the central part of the elastomeric body. Each feature has a second recess, which preferably extends continuously from a first to a second side of the feature. Within the second recess, in one embodiment, are bushings, which preferably do not project beyond a first and a second surface of the feature opposite the first.

[0047] Preferably, the first surface of the feature is set back from the first surface of the central part, i.e., it is spaced from it in a step-like fashion. In particular, the first surface of the feature is recessed from the first surface of the central part. Preferably, the first surfaces of the feature are arranged parallel to the first surface of the central part. It is further preferably that the second surface of the central part is set back from the second surface of the feature, i.e., it is spaced from it in a step-like fashion. In particular, the second surface of the central part is recessed from the second surface of the feature. Preferably, the second surface of the central part is arranged parallel to the first surfaces of the features.

[0048] In a further preferred embodiment, the first surfaces of the features are arranged to lie in one plane. In a further embodiment, the second surfaces of the features are arranged to lie in one plane.

[0049] Furthermore, a method for attaching a vibration-inducing part to a wall is proposed, the method comprising the following steps: Providing a vibration damper as described above, attaching fastening means to at least one wall of a housing of an air extraction device and in the first recess of the vibration damper, attaching second fastening means to at least one vibration-inducing part and in at least second recesses of the vibration damper.

[0050] In a preferred embodiment, bushings are provided for in the first and / or the second recesses. It is further preferred that the bushings are designed as vibration damping elements, or are connected to or incorporate such elements. Preferably, a connection to the wall and / or to the vibration-inducing part is established via vibration damping elements. In a further embodiment, connecting elements designed as vibration damping elements are inserted into the recesses and / or the bushings. The vibration damping elements can, in particular, be designed as rubber-metal vibration dampers or rubber-metal buffers.

[0051] Furthermore, the use of a vibration damper as described above is proposed for connecting at least one vibration-inducing part to at least one wall of a housing of an air extraction device described above.

[0052] Further advantageous embodiments are shown in the following drawings. However, the developments shown there are not to be interpreted as limiting; rather, the features described therein can be combined with each other and with the features described above to form further embodiments. Furthermore, it should be noted that the reference numerals given in the figure descriptions do not limit the scope of protection of the present invention but merely refer to the exemplary embodiments shown in the figures. Identical parts or parts with the same function are subsequently designated with the same reference numerals. Reference numerals are listed by way of example for the sake of clarity, so that identical parts or parts with the same function, which are recognizable as such, are only marked once. The figures show: Fig. 1 shows a vibration damper in a top view of the second side; Fig. 2 shows the vibration damper of theFig. 1 in a side view; Fig. 3 of the vibration damper of the Fig. 1 in a top view of the first side; Fig. 4 of the vibration damper according to Fig. 1 in a perspective sectional view; Fig. 5 the sectional view from Fig. 4 in a top view of the section; Fig. 6 an exploded view of an air extraction device; and Fig. 7 a sectional view of an assembled air extraction device.

[0053] Fig. 1 Figure 22 shows a vibration damper 18 in a top view from the first side. The vibration damper 18 has an elastomeric body 20, which has a central part 26 and three features 34. The central part 26 is designed as a circular ring with a central recess 28 that is also circular.

[0054] The central part has four first recesses, which are evenly distributed in the central part and arranged on a first circular circumference 31. The features 34 each have a second recess, which is arranged centrally in the cylindrical part of the features 34 and arranged on a second circular circumference 37.

[0055] Fig. 2 Figure 1 shows the vibration damper 18 in a side view. It can be seen that the vibration damper 18 has a first side 22 and a second side 24, wherein the central part 26 projects beyond the features 34 on the first side 22 according to the invention. The features 34 project beyond the central part 18 on the second side 24 according to the invention.

[0056] Fig. 3 Figure 24 shows the vibration damper 18 in a top view from the second side. In this view, the elastomeric body 20 with the annular central section 26 and the three features 34 can be seen. It can also be seen that the central section 26 has four first recesses 30 into which bushings 32 are inserted. The bushings 32 project radially outwards on the second side 24, so that they form a support, particularly when connecting elements, which can be designed as screws, are screwed into the bushings 32.

[0057] Second bushings 38 are also inserted into the second recesses 36. As can be seen from the Figuren 1 und 3 As can be seen, the second bushings 38 are completely within the second recesses and do not protrude beyond either side. In particular, the second bushings on the first or second side 22 and 24 are flush.

[0058] Fig. 4 Figure 1 shows an isometric view of the vibration damper 18 with a section through the elastomeric body 20. In this section, first recesses 30 and second recesses 36 are shown in particular. It can be seen that first bushings 32 are arranged in the first recesses 30 and second bushings 38 are arranged in the second recesses 36. Furthermore, it can be seen that the features 34 have first surfaces 44, each bounded by a first edge 46 of the features 34. The first surface 44 of the feature 34 is also bounded by a connection point 48, where the feature 34 borders a lateral surface 56 of the central part 26. The central part 26 has a first surface 40, which is bounded by a first circumferential edge 42 of the central part 26. The first surface 40 of the middle part 26 is further bounded by a first internal edge 43.The feature 34 further comprises a lateral surface 58 that borders on or merges into a lateral surface 56 of the central part 26. A portion of the lateral surface 58 of the feature 34 is connected to the lateral surface 56 of the cylindrical central part 26 via a rounded transition area 57.

[0059] Fig. 5 shows a top view of the cut surface made of Fig. 4 This shows that the first surface 44 of the feature 34 on the first side 22 is set back from the first surface 40 of the middle section 26 by a first height 60. The height 60 is approximately one-sixth of the total height 61 of the vibration damper 18.

[0060] Furthermore, on the second side 24, the second surface 50 of the central section 26 is set back by the second height 62 from the second surface 54 of the feature 34. The second height 62 is also approximately one-sixth of the total height 61 of the vibration damper 18.

[0061] Fig. 5 Furthermore, the circumferential edge 42 can be seen, which bounds the first surface 40 of the central part 26. The connection point 48 bounds the second surface 50 in conjunction with the second circumferential edge 52, which consists of Fig. 4 emerges, as well as the second inner edge 53, which also consists of Fig. 4 emerges. The second surface 54 of the feature 26 is bounded by the circumferential edge 47.

[0062] Out of Fig. 5 It can further be seen that the first recesses 30 have first bushings 32 which are T-shaped in cross-section. The T-shaped design ensures that the first bushings 32 are supported on the second surface 50 of the central part 26 and cannot fall out of the body 20 towards the first side 22. Furthermore, this design of the bushings 32 ensures that a tensile force introduced into the bushing 32 by a connecting element (not shown), which is screwed into the bushing 32, is advantageously distributed over the elastomeric body 20 without any significant deformation of the body 20 impairing its vibration damping properties.

[0063] Furthermore, it is generally clear from the figures that a sound or vibration path between the second bushings 38, through which structure-borne sound from a vibration-inducing part can be introduced, passes through the elastomeric body 20 into the first bushing 32, which in one embodiment is rigidly connected to the wall of a Fig. 6 is connected to the housing shown. In particular, optimal vibration damping is generated by the geometry of the elastomeric body, namely the offset of the features 34 to the central part 26 and the elastomeric designs of the body 20.

[0064] Not shown here is the embodiment described in the general description, in which the bushings 38 and / or 32 also alternatively or jointly have vibration-damping properties and are designed, in particular, as vibration dampers. For example, in one embodiment, the bushings 32 are provided to project beyond the surface 40 on the first side 22 and, in particular, to have vibration-damping connecting elements, which are designed, for example, as rubber-metal buffers or similar. The bushings 38 can also project beyond a second surface 54 of the features 34 and have vibration-damping properties or vibration-damping elements, such as rubber-metal buffers or similar. These embodiments can achieve additional vibration damping, if necessary.

[0065] Of course, further designs as described in the general description with more or fewer first recesses 30 or second recesses 36 or features 34 may also be provided.

[0066] Fig. 6 Figure 1 shows an air extraction device 10 with an intake nozzle 11 and a housing 12 into which a vibration-inducing part 16, designed as a motor, is inserted. A vibration damper 18 is arranged between the vibration-inducing part 16 and the housing 12. The vibration-inducing part 16, designed as a motor, incorporates a fan wheel 17, which is configured to draw air through the intake nozzle 11, redirect it via a deflector 21 located in the housing 12, and guide it out of the air extraction device 10 through a filter 23. A tray 19 for collecting condensate is part of the housing 12. The air extraction device 10 can be connected to an opening (not shown) for releasing the extracted air by means of a sealing ring 13.

[0067] Fig. 7Figure 1 shows a sectional view of the air extraction device 10 in an assembled state. It can be seen that the first connecting elements 25 are designed as screws and are screwed into the first bushings 32, which are designed as threaded inserts, to attach the vibration damper 18 to the wall 14 of the housing 12. Second connecting elements 27, which are also designed as screws, are inserted through the second bushings 38 and screwed into internal threads (not further specified here) of the vibration-inducing part 16.

[0068] The proposed air extraction device 10 and the proposed vibration damper 18 have the great advantage that noises induced by an imprecisely balanced motor or fan wheel 17 are not transmitted to the housing 12 and surrounding components or pieces of furniture.

Claims

1. Air suction device (10) comprising a housing (12) with at least one wall (14) and at least one vibrating part (16), wherein the air suction device (10) comprises at least one vibration damper (18) which can be arranged between the vibrating part (16) and the wall (14), wherein the at least one vibration damper (18) comprises an elastomeric body (20), wherein the body (20) comprises a plurality of first recesses (30) and a plurality of second recesses (36), wherein the elastomeric body (20) has a cylindrical or prismatic middle section (26) and a plurality of protrusions (34), wherein the protrusions (34) are arranged radially outwardly on the middle section (26) on its outer surface (56), wherein the body (20) has at least a first side (22) and a second side (24) opposite thereto, wherein at least one surface (40, 50) of the middle section (26) of the first side (22) and the second side (24) is offset from a surface (44, 54) of at least one protrusion (34) of the same side (22, 24), wherein the middle section (26) protrudes above the protrusions (34) on the first side (22) and the protrusions (34) protrude above the middle section (26) on the second side (24), and wherein the second recesses (36) are arranged in the protrusions (34), wherein the first recesses (30) are formed for receiving first connecting means (25) for connection to the at least one wall (14) and the second recesses (36) for receiving second connecting means (27) for connection to the vibrating part (16).

2. Air suction device (10) according to claim 1, characterized in that the first recesses (30) and / or the second recesses (36) are arranged essentially on a first circumference (31) and / or on a second circumference (37).

3. Air suction device (10) according to one or more of the preceding claims, characterized in that the body (20) has exactly three second recesses.

4. Air suction device (10) according to one or more of the preceding claims, characterized in that bushings (32) are arranged at least partially in the first recesses (30) and / or in the second recesses (36).

5. Air suction device (10) according to claim 4, characterized in that the bushings (32) comprise a vibration-damping material that interacts with the material of the elastomeric body (20).

6. Air suction device (10) according to one or more of the preceding claims, characterized in that the vibrating part (16) comprises at least one motor.

7. Vibration damper (18) for use in an air suction device (10) according to one or more of the preceding claims, comprising an elastomeric body (20), wherein the body (20) comprises a plurality of first recesses (30) and a plurality of second recesses (36), wherein the elastomeric body (20) having a cylindrical or prismatic middle section (26) and a plurality of protrusions (34), wherein the protrusions (34) are arranged radially outwardly on the middle section (26) on its outer surface (56), wherein the body (20) having at least one first side (22) and a second side (24) located opposite thereto, wherein at least one surface (40, 50) of the middle section (26) of the first side (22) and the second side (24) is offset from a surface (44, 54) of at least one protrusion (34) of the same side (22, 24), wherein the middle section (26) protrudes beyond the protrusions (34) on the first side (22) and the protrusions (34) protrude beyond the middle section (26) on the second side (24), and wherein the second recesses (36) are arranged in the protrusions (34), wherein the first recesses (30) are formed to accommodate first connecting means (25) for connection to at least one wall (14) and the second recesses (36) are developed to accommodate second connecting means (27) for connection to at least one vibrating part (16).

8. Vibration damper (18) according to claim 7, characterized in that bushings (32) are arranged in the first recesses (30) and / or the second recesses (36).

9. Vibration damper (18) according to one or more of claims 7 to 8, characterized in that the bushings (32) comprise a vibration-damping material that interacts with the material of the elastomeric body (20).

10. Method for attaching a vibrating part (16) to a wall (14), comprising - providing a vibration damper (18) according to one or more of claims 7 to 9, - fastening first connecting means (25) to at least one wall (14) of a housing (12) of an air suction device (10) and in first recesses (30) of the vibration damper (18), - fastening second connecting means (27) to at least one vibrating part (16) and in second recesses (36) of the vibration damper (18).

11. Use of a vibration damper (18) according to one or more of claims 7 to 9 for connecting at least one vibrating part (16) to at least one wall (14) of a housing (12) of an air suction device (10) according to one or more of claims 1 to 6.