Storage facility

Abstract

A mounting device (1), in particular for mounting a motor vehicle component on a motor vehicle body, comprising a fluid working chamber (2) which is in flow communication via at least one fluid channel with a fluid compensation chamber (3) located in a housing (21) of the mounting device (1), wherein the fluid working chamber (2) and the fluid compensation chamber (3) are separated by a separating element (8) in which the at least one fluid channel is located, wherein the separating element (8) is decoupled from the housing (21) by means of an elastic element (7) encompassing the separating element (8) in the circumferential direction, wherein the housing (21) has a cover (5) receiving the fluid compensation chamber (3) and a support part (20) holding a spring element (18) of the mounting device, wherein the cover (5) engages between the support part (20) and the elastic element (7) in such a manner thatthat, viewed in a radial direction with respect to a longitudinal central axis (4) of the bearing device (1), the elastic element (7), the cover (5) and the support part (20) follow one another, characterized in that an elastic membrane (12) is attached to the separating element (8), which fluidically separates a fluid damping chamber (13) from the fluid working chamber (2), wherein the fluid damping chamber (13) is in flow communication with an external environment (25) of the bearing device (1) via a throttle channel (24), wherein the fluid damping chamber (13) is arranged in the separating element (8) and the throttle channel (24) is formed in a projection (26) of the cover (5) which is at least partially surrounded by the fluid equalization chamber (3) in an annular manner and which projects up to the separating element (8).

Description

[0001] The invention relates to a bearing device, in particular for mounting a motor vehicle assembly on a motor vehicle body, having a fluid working chamber which is in flow connection via at least one fluid channel with a fluid compensation chamber present in a housing of the bearing device, wherein the fluid working chamber and the fluid compensation chamber are separated by a separating element in which the at least one fluid channel is present, wherein the separating element is decoupled from the housing by means of an elastic element encompassing the separating element in the circumferential direction, wherein the housing has a cover accommodating the fluid compensation chamber and a support part holding a spring body of the bearing device, wherein the cover engages between the support part and the elastic element in such a way that, viewed in the radial direction with respect to a longitudinal central axis of the bearing device, the elastic element,the cover and the support part follow one another.,

[0002] From the prior art, for example, the document DE 602 14 982 T2 is known. This relates to a fluid-tight vibration damping device, comprising: a first connecting element, which can be fastened to a vibration source side, a second connecting element, which can be fastened to a vehicle body side, and an elastic body portion having a substantially conical shape, which is arranged between them, wherein a fluid chamber is formed using the elastic body portion and a diaphragm as parts of its wall, wherein the fluid chamber is divided by a partition element into a main fluid chamber and a sub-fluid chamber, wherein the main fluid chamber is arranged between the elastic body portion and the partition element, wherein the sub-fluid chamber is arranged between the diaphragm and the partition element, wherein the diaphragm has an elastic peripheral wall portion,wherein the partition member is provided with an opening passage for communication with both the main fluid chamber and the sub-fluid chamber, wherein an opening and closing means is provided for opening and closing the opening passage, characterized in that the partition member comprises an elastic intermediate portion disposed between an upper and a lower portion, wherein an outermost part of the intermediate portion forms a buffer flange projecting outward in the radial direction and compressible in response to a vibration in the main fluid chamber, wherein an outer peripheral portion of the partition member is supported by the buffer flange and the elastic peripheral wall portion in a floating manner, so that the upper portion and the lower portion can move vertically in response to a vibration exerted on the main fluid chamber,

[0003] Furthermore, the prior art includes the publications DE 10 2007 058 191 A1, US 5 516 084 A, DE 38 28 132 A1, DE 41 00 370 C1, DE 10 2007 049 794 A1, DE 10 2005 012 964 A1, US 7 494 115 B2, US 6 755 401 B2, US 6 412 760 B2, as well as the non-patent literature HEIßING, Bernd; ERSOY, Metin; GIES, Stefan: Fahrwerkhandbuch (Chassis Manual). 4th edition. Wiesbaden: Springer Vieweg Verlag, 2013, ISBN 978-3-658-01991-4.

[0004] The mounting device serves to dampen the mounting of a motor vehicle assembly, for example, an internal combustion engine, on another assembly, preferably the motor vehicle body. In this respect, the mounting device can also be referred to as a damping device. The mounting device can be attached to a subframe, also referred to as a subframe, which in turn is attached to a supporting structure of the motor vehicle body. The subframe, together with the supporting structure, can thus constitute the motor vehicle body. The motor vehicle assembly is thus connected, or connectable, to the subframe and, accordingly, to the motor vehicle body via the mounting device.

[0005] If the mounting device is intended for mounting the internal combustion engine on the vehicle body, it is also commonly referred to as an engine mount. The following only discusses the use of the mounting device as an engine mount, i.e., the use for mounting the vehicle assembly or internal combustion engine on the vehicle body. Of course, the mounting device can also be intended for other purposes, in which case the following explanations can be applied analogously.

[0006] The motor vehicle assembly is attached to the motor vehicle body via the mounting device; in particular, it is supported on the motor vehicle body via the mounting device. The mounting device is arranged between the motor vehicle assembly and the motor vehicle body in such a way that it is urged toward the motor vehicle body by the force of gravity acting on the motor vehicle assembly. Preferably, not just a single mounting device is provided for mounting the motor vehicle assembly, but rather a plurality of mounting devices that are identical or at least analogous to the described mounting device.

[0007] The bearing device comprises the fluid working chamber and the fluid compensation chamber. These are fluidly connected to each other via the fluid channel. The fluid working chamber is preferably located in the operative connection between the motor vehicle assembly and the motor vehicle body. This means that the motor vehicle assembly is supported on the motor vehicle body via the fluid working chamber, or the fluid present therein. If the motor vehicle assembly is displaced, for example due to vibrations, the volume of the fluid working chamber changes accordingly.

[0008] When the volume of the fluid working chamber decreases, the fluid in the fluid working chamber is forced from the fluid working chamber via the fluid channel into the fluid compensation chamber. If, however, the volume increases, the fluid can flow from the fluid compensation chamber back into the fluid working chamber via the fluid channel. The bearing device serves to dampen vibrations in the motor vehicle assembly, i.e., it is intended to prevent or at least dampen the transmission of vibrations from the motor vehicle assembly to the vehicle body. For this purpose, at least one throttle can be present in the fluid channel, so that the damping behavior of the bearing device can be adjusted using the throttle.

[0009] The volume of the fluid compensation chamber is not located, or at most only to a small extent, in the operative connection between the motor vehicle assembly and the motor vehicle body. For example, the fluid compensation chamber is located in the housing of the bearing device, which housing is particularly rigid. Although it may be provided that the motor vehicle assembly is supported on the motor vehicle body via the housing, due to the rigid design, the weight of the motor vehicle assembly does not, at least not directly, cause a change in the volume of the fluid compensation chamber.

[0010] It is now an object of the invention to propose a bearing device which has advantages over known bearing devices, in particular enabling reliable damping of vibrations of the motor vehicle assembly while at the same time having low construction costs and better adjustability of the damping behavior of the bearing device.

[0011] This is achieved according to the invention with a bearing device having the features of claim 1. It is provided that an elastic membrane is fastened to the separating element, which fluid damping chamber fluidically separates a fluid damping chamber from the fluid working chamber, wherein the fluid damping chamber is in flow connection with an external environment of the bearing device via a throttle channel, wherein the fluid damping chamber is arranged in the separating element and the throttle channel is formed in a projection of the cover which is at least partially annularly encompassed by the fluid compensation chamber and which projects as far as the separating element.

[0012] The separating element separates the fluid working chamber from the fluid equalization chamber and additionally has at least one fluid channel via which the fluid working chamber and the fluid equalization chamber are in flow communication with one another. The separating element is located between the fluid working chamber and the fluid equalization chamber. To establish the fluid connection between the fluid working chamber and the fluid equalization chamber, at least one fluid channel is formed in the separating element. Of course, it can alternatively also be provided that the fluid channel is formed by the separating element or that the separating element co-forms the fluid channel at least in part. The separating element is preferably arranged in the housing or at least on it. For example, the separating element is fastened to the housing.

[0013] The fluid channel can be nozzle-shaped at least in some areas or be entirely formed as a nozzle. For example, the fluid channel has a round cross-section along its entire longitudinal extent. Additionally or alternatively, it can be straight over its entire longitudinal extent or curved at least in sections. For example, the fluid channel has a widening at its end opening into the fluid working chamber and / or at its end opening into the fluid compensation chamber, so that the diameter of the fluid channel increases toward the fluid working chamber and / or toward the fluid compensation chamber.

[0014] The separating element is positioned, for example, perpendicular or at least nearly perpendicular to a longitudinal center axis of the bearing device. It is arranged in a floating manner in the housing of the bearing device, or is mounted therein. This means that the separating element can be displaced at least slightly relative to the housing, in particular relative to the longitudinal center axis of the bearing device in the radial and / or axial direction. For this purpose, the elastic element is provided, which preferably completely encompasses the separating element in the circumferential direction relative to the longitudinal center axis.

[0015] In this respect, it is provided that the separating element is arranged at a distance from the housing or from the housing walls of the housing, i.e. is not in contact with the housing or the housing walls. The elastic element is provided to space the separating element from the housing. For example, the elastic element is located continuously in the circumferential direction between the separating element and the housing or the housing walls and keeps the separating element at a distance from the latter. A bellows, for example, is used as the separating element, in which the fluid compensation chamber is formed at least in part, in particular completely. For example, the fluid compensation chamber is delimited by the elastic element or the bellows on the one hand and the separating element on the other.For this purpose, the elastic element can be connected to the separating element in a fluid-tight manner or attached to it.

[0016] The cover and / or the separating element are preferably made of a rigid material or materials. This means that the separating element urges the elastic element radially outwards towards the cover, while the cover in turn urges the elastic element radially inwards towards the separating element. By arranging the elastic element between the cover and the separating element, the latter is decoupled from the housing and in particular the cover. At the same time, however, a reliable fastening of the elastic element is achieved, namely by it being fastened at least force-fittingly between the cover and the separating element. In addition, a form-fitting connection can be provided between the elastic element and the cover on the one hand and / or the separating element on the other.

[0017] It is further provided that the housing comprises the cover and the support part, wherein the cover engages between the support part and the elastic element. The cover serves to accommodate the fluid compensation chamber and / or the elastic element. The cover can have a projection, in particular a central projection, which engages in the annular shape of the fluid compensation chamber. For example, the projection extends as far as the separating element. Particularly preferably, the elastic element is held clamped between the cover and the separating element. Additionally or alternatively, a positive connection can be provided.

[0018] The support part serves, for example, to connect or fasten a first bearing point to which the motor vehicle assembly can be fastened. For example, the first bearing point is connected via the spring body, in particular an elastomer body. The support part is designed to support or hold the spring body. The spring body is thus fastened by means of the support part. For example, the spring body is cast or injection-molded onto the support part. The support part is preferably made of a stiffer material than the spring body, in particular of metal, preferably steel.

[0019] For example, the first bearing point is located on a bearing cover which has the spring body, in particular the elastomer body. The spring body is preferably connected to the first bearing point via a bearing core. Of course, however, the first bearing point can also be located directly on the spring body. For example, the bearing core is accommodated in the spring body, in particular cast into it. In this way, a reliable hold of the first bearing point with respect to the spring body is achieved. The spring body, together with the separating element, delimits the fluid working chamber. For example, the spring body has a recess which is engaged over or closed by the separating element. The spring body can engage laterally around the separating element so that, for example, it is arranged overlapping with the cover - viewed in the axial direction.

[0020] To ensure a permanent and stable attachment of the cover to the support part, the cover should engage between the support part and the elastic element. The cover preferably rests on the one hand against the support part and on the other hand against the elastic element, in particular on the outside of the support part in the radial direction and on the inside of the elastic element in the radial direction. Thus, viewed in the radial direction relative to the longitudinal center axis of the bearing device, the elastic element, the cover, and the support part follow one another, in particular directly one after the other.

[0021] This means, in particular, that the elastic element, the cover, and the support part overlap one another in the axial direction, i.e., they are each arranged in some areas at the same axial position relative to the longitudinal center axis. The three elements mentioned lie in an imaginary plane perpendicular to the longitudinal center axis of the bearing device. The connection between the cover and the support part can be a form-fitting connection. For example, during assembly of the bearing device, the support part is flanged so that it engages behind a portion of the cover. This is preferably provided on the side of the support part facing away from the spring body.

[0022] In a further embodiment of the invention, it is provided that the elastic element, together with the separating element, encloses the fluid compensation chamber. This has already been pointed out above. The fluid compensation chamber is, for example, annular or at least approximately annular. It is delimited on its radially inner side and on its radially outer side by side walls of the elastic element, wherein the side walls of the elastic element are connected to one another by a base part of the elastic element. The elastic element has, for example, at least approximately the shape of a rotary body in which a U-shape is rotated about a central axis, preferably the longitudinal central axis of the bearing device.

[0023] On the side of the elastic element opposite the base part, the separating element is arranged or attached to the elastic element, so that the elastic element and the separating element together enclose the fluid compensation chamber. The elastic element is preferably connected to the separating element in a fluid-tight manner, so that fluid can only flow out of or into the fluid compensation chamber through the at least one fluid channel.

[0024] Within the scope of a further embodiment of the invention, it is provided that the separating element is fastened to the housing via the elastic element. The separating element not only decouples the separating element from the housing, but also secures the separating element to the housing. The elastic element thus provides a retaining connection between the separating element and the housing. Particularly preferably, the separating element is fastened to the housing exclusively via the elastic element, i.e., is arranged at a continuous distance from the housing or housing walls.

[0025] A preferred further embodiment of the invention provides that the spring body is secured via the support part in a guide recess of a guide device, wherein the support part engages between the guide device and the cover in such a way that, viewed in the radial direction relative to the longitudinal center axis, the elastic element, the cover, the support part, and the guide device follow one another. The support part preferably bears against the cover on one side and the guide device on the other, in particular on the outside of the guide device in the radial direction and on the inside of the cover in the radial direction.

[0026] For example, the elastic element, the cover, the support part, and the guide device are designed to overlap each other in the axial direction, meaning that they are each arranged in some areas at the same axial position relative to the longitudinal center axis. The four elements mentioned lie in the imaginary plane perpendicular to the longitudinal center axis of the bearing device. A corresponding arrangement can also be provided for the separating element, so that a total of five elements are arranged in the imaginary plane, meaning that they overlap each other in the axial direction.

[0027] A further development of the invention provides that the elastic element is arranged between the cover and the support part, in particular is held in a clamped manner. For example, the elastic element is located between the cover and the support part, in particular between a free end of the cover and a contact surface of the support part, as seen in the axial direction. The contact surface is formed, for example, by a region of the support part that extends outwards or is bent over in the radial direction. As seen in the axial direction, the elastic element preferably rests on the one hand on the cover and on the other hand on the support part, in particular the contact surface. It can be clamped between them, i.e. held by them in a force-fitting manner.

[0028] A further embodiment of the invention provides that the support part partially overlaps the cover in the axial direction and is positively secured to the cover. This has already been mentioned above. The positive attachment of the support part to the cover can be achieved, for example, by flanging the support part. Particularly preferably, the support part, and in particular the flanging, rests directly against the cover. In this respect, no additional element is provided between the support part and the cover.

[0029] A further preferred embodiment of the invention provides that the elastic element has a separating element receiving groove for the separating element. The separating element receiving groove is preferably continuous in the circumferential direction, so that the separating element is also arranged continuously in it in the circumferential direction. However, it can also be interrupted and in this respect consist of several spaced-apart groove sections. With the aid of the separating element receiving groove, a positive connection of the separating element to the elastic element is established. The separating element receiving groove is preferably designed such that displacement of the separating element in the axial direction with respect to the elastic element is prevented, in particular by forming a positive connection.

[0030] For example, in a further embodiment of the invention, the separating element comprises a first part and a second part, wherein the two parts are fastened to one another and / or both engage in the separating element receiving groove. The separating element is therefore designed in several parts and has at least the first part and the second part. These can be fastened to one another, for example, they are riveted together. For this purpose, rivet projections of the first part preferably penetrate the second part and are widened on the side of the second part facing away from the first part, for example by pressing or wobbling, so that the two parts are reliably connected to one another.

[0031] Additionally or alternatively, it is provided that the two parts engage in the separating element receiving groove. This is designed, for example, in such a way that the two parts are forced toward each other in the axial direction. Accordingly, by engaging in the separating element receiving groove, the elastic element applies a force to each of the two parts, which pushes them toward the other part, so that the two parts preferably abut against each other, at least in some areas.

[0032] The invention provides that an elastic membrane is attached to the separating element, in particular is clamped between the first part and the second part, which fluidically separates a fluid damping chamber from the fluid working chamber, wherein the fluid damping chamber is fluidly connected to an external environment of the bearing device via a throttle channel. In addition to the fluid working chamber and the fluid compensation chamber, the bearing device therefore has the fluid damping chamber. Preferably, the fluid damping chamber is completely or at least almost completely fluidically separated from the fluid working chamber and / or the fluid compensation chamber. This means that the fluid from the fluid working chamber and / or the fluid compensation chamber cannot pass into the fluid damping chamber and vice versa.For this purpose, the elastic membrane, which is fluid-tight or at least almost fluid-tight, is arranged between the fluid working chamber and the fluid damping chamber.

[0033] If low-frequency vibrations occur in the internal combustion engine, especially those with a large displacement or high vibration energy, the fluid can flow from the fluid working chamber through the fluid channel toward the fluid compensation chamber, or vice versa. Thanks to the flow connection between the fluid working chamber and the fluid compensation chamber, such low-frequency vibrations are reliably damped. Because these vibrations cause the diaphragm to deflect strongly toward the fluid damping chamber, high pressure can occur in the fluid damping chamber.

[0034] Because the high pressure can lead to undesirable noise, a preferred embodiment of the invention can provide a throttle channel through which pressure equalization can take place between the fluid in the fluid damping chamber and the outside environment. However, the throttle channel is optional. The fluid damping chamber is in flow connection with the outside environment of the bearing device via the throttle channel. Such a configuration has the advantage that, by means of the elastic membrane and / or the fluid present in the fluid damping chamber, efficient damping can also be achieved even of high-frequency vibrations of the internal combustion engine without the aforementioned noise occurring. The throttle channel can also be assigned a cross-section adjustment element by means of which the flow cross-section of the throttle channel can be adjusted.The cross-sectional adjustment element is, for example, in the form of a control valve or the like. The control valve can be designed as a discretely switching control valve or as a continuous valve.

[0035] The elastic membrane is attached to the separating element. For this purpose, it engages, for example, at least partially in the separating element so that it is held thereon in a form-fitting and / or force-fitting manner. If the separating element is designed in several parts and therefore has at least the first part and the second part, the elastic membrane can be held in a clamped manner between the first part and the second part. The at least one fluid channel is located in the first part, which is preferably arranged or fastened in or on the housing. The second part of the separating element is attached to the first part and preferably overlaps it on the side of the fluid working chamber. For example, it is arranged in such a way that it pushes the membrane towards the first part or fixes it to it.For example, both the first part and the second part of the separating element each have a recess into which the membrane or an edge projection of the membrane engages.

[0036] Finally, within the scope of the invention, it is provided that the fluid damping chamber is arranged in the separating element. This results in a space-efficient design of the bearing device. For example, the separating element has a recess for forming the fluid damping chamber, which is open toward the fluid working chamber. The membrane now completely overlaps the fluid damping chamber or the recess, so that the fluid damping chamber is fluidically separated from the fluid working chamber.

[0037] Additionally or alternatively, a further embodiment of the invention can provide for a first bearing point, in particular for the motor vehicle assembly, to be arranged on a bearing cover which delimits the fluid working chamber together with the separating element, and / or for a second bearing point, in particular for the motor vehicle body, to be connected to the housing. The damping effect of the bearing device is present between the first bearing point and the second bearing point. The motor vehicle assembly is preferably connected to the first bearing point and the motor vehicle body is connected to the second bearing point, in particular directly. The first bearing point is located on the bearing cover, which delimits the fluid working chamber at least in some regions, in particular together with the separating element. For this purpose, for example, the bearing cover has a recess which represents the fluid working chamber and is closed off by the separating element.The second bearing point, however, can be connected to the housing, preferably rigidly.

[0038] Furthermore, a motor vehicle is disclosed, comprising a motor vehicle assembly, a motor vehicle body, and a mounting device by means of which the motor vehicle assembly is mounted on the motor vehicle body. The mounting device has a fluid working chamber that is in flow communication with a fluid compensation chamber provided in a housing of the mounting device via at least one fluid channel. The fluid working chamber and the fluid compensation chamber are separated by a separating element in which the at least one fluid channel is provided. It is provided that the separating element is decoupled from the housing by means of an elastic element that encompasses the separating element in the circumferential direction.

[0039] The advantages of such a design of the motor vehicle or storage device have already been pointed out. Both the motor vehicle and the storage device can be further developed according to the above explanations, so reference is made to these in this regard.

[0040] The invention is explained in more detail below with reference to the exemplary embodiments illustrated in the drawings, without limiting the invention. In the drawings: Fig. 1 a longitudinal section through a mounting device for mounting a motor vehicle unit on a motor vehicle body, and Fig. 2 a detailed view of an area of ​​the storage facility.

[0041] The Fig. 1 shows a longitudinal section through a bearing device 1. This serves, for example, to provide a damping connection between a motor vehicle assembly, in particular an internal combustion engine, and another device, for example, a motor vehicle body. The bearing device 1 has a fluid working chamber 2 and a fluid compensation chamber 3. A longitudinal center axis 4 of the bearing device 1, along which the longitudinal section is taken, is indicated. The fluid working chamber 2 and the fluid compensation chamber 3 are fluidly connected to each other via at least one fluid channel.

[0042] The fluid equalization chamber 3 is arranged in a cover 5 of the bearing device 1. For example, the cover 5 has an annular recess 6 in which the fluid equalization chamber 3 is located. To form the fluid equalization chamber 3, an elastic element 7, in particular an elastomer element, can be arranged in the cover 5, in particular in the annular recess 6. This elastic element 7 can be fastened in a fluid-tight manner to a separating element 8 to form the fluid equalization chamber 3. For example, the element 7 has a holding area 9 that is clamped between the separating element 8 and the cover 5.

[0043] The separating element 8 serves to separate the fluid working chamber 2 and the fluid equalization chamber 3. Accordingly, the separating element 8 is arranged between them. The separating element 8 contains at least one fluid channel, via which the fluid working chamber 2 and the fluid equalization chamber 3 are in flow communication, in particular in permanent flow communication. For example, the separating element 8 consists of a first part 10 and a second part 11. The second part 11 can be attached to the first part 10, for example, it can be riveted to it.

[0044] An elastic membrane 12 is held, in particular clamped, between the two parts 10 and 11 of the separating element 8. The membrane 12 serves to separate a fluid damping chamber 13 from the fluid working chamber 2. For example, the fluid damping chamber 13 is formed in the separating element 8, in particular in the first part 10 of the separating element 8, and is completely overlapped by the membrane 12. The fluid damping chamber 13 is thus completely separated from the fluid working chamber 2 and the fluid equalization chamber 3 in terms of fluid technology. The membrane 12 has, for example, an edge 14 which engages on the one hand in the first part 10 and on the other hand in the second part 11 of the separating element 8. The second part 11 of the separating element 8 is designed to be fluid-permeable, so that a direct flow connection exists between the fluid working chamber 2 and the membrane 12.

[0045] The bearing device 1 has a first bearing point 15 and a second bearing point 16. The motor vehicle assembly, for example, is fastened to the bearing device 1 via the first bearing point 15, and the motor vehicle body via the second bearing point 16, so that the motor vehicle assembly is subsequently connected to the motor vehicle body via the bearing device 1. The first bearing point 15 is located on a bearing cover 17, which has a spring body 18, in particular an elastomer body. The spring body 18 is connected to the first bearing point 15, for example, via a bearing core 19. Of course, in a departure from the embodiment shown here, the first bearing point 15 can also be located directly on the bearing core 19.

[0046] The spring body 18, together with the separating element 8, defines the fluid working chamber 2. In particular, the spring body 18 has a recess which is overlapped or closed by the separating element 8. The bearing core 19 is preferably embedded in the spring body 18, in particular cast into it. The spring body 18 is connected to the cover 5, for example, by means of a support part 20 or a clamp. The cover 5 and the support part 20 form a housing 21 of the bearing device 1.

[0047] For example, the spring body 18 is secured via the support part 20 in a guide recess 22 of a guide device 23. The guide device 23 can be used to prevent, in particular, the spring body 18 from buckling in the radial direction. The guide device 23 is preferably secured to the motor vehicle body. The second bearing point 16 can be located on the guide device 23. In this case, the guide device 23 is preferably rigidly connected to the housing 21, in particular to the support part 20 and / or the cover 5.

[0048] To further improve the damping effect of the bearing device 1 and to prevent unwanted noise generation, the fluid damping chamber 13 is fluidly connected to an external environment 25 of the bearing device 1 via a throttle channel 24. For example, the cover 5 has a projection 26, which is at least partially surrounded by the fluid compensation chamber 3 and extends in the direction of the fluid damping chamber 13. In the exemplary embodiment illustrated here, the cover 5 has a flow channel 27, which is preferably formed in the projection 26.

[0049] It is clear that in the embodiment shown here, the separating element 8 is decoupled from the housing 21, in particular from the cover 5 and the support part 20, by means of the elastic element 7. For this purpose, the elastic element 7 preferably completely encompasses the separating element 8 in the circumferential direction with respect to the longitudinal center axis 4. For example, the elastic element 7 has a separating element receiving groove 28, which preferably runs continuously in the circumferential direction. The separating element 8 engages in the separating element receiving groove 28. In particular, it is provided that both the first part 10 and the second part 11 of the separating element 8 engage in the separating element receiving groove 28. Due to the elastic effect of the elastic element 7, the two parts 10 and 11 are thus forced towards one another and additionally held against one another.

[0050] To achieve reliable attachment of the support part 20 to the cover 5, the cover 5 overlaps the separating element 8 at least partially in the axial direction. For example, the cover 5 extends in the axial direction, starting from the fluid equalization chamber 3 in the direction of the fluid working chamber 2, over the separating element receiving groove 28 and / or the second part 11 of the separating element 8, thus overlapping the separating element receiving groove 28 and / or the second part 11 of the separating element 8 in the axial direction.

[0051] Preferably, both the separating element 8 and the cover 5 are made of a rigid material. In this respect, the elastic element 7, in particular its holding region 9, is reliably held in a clamped manner between the cover 5 and the separating element 8. It can be provided that the elastic element 7 or its holding region 9 has a radial projection 29 which extends outwards in the radial direction. Particularly preferably, the radial projection 29 engages between the cover 5 and the support part 20. For example, the radial projection 29 rests on the one hand on the cover 5 and / or on the other hand on the support part 20, in particular it is held in a clamped manner between the cover 5 and the support part 20.

[0052] The support part 20 is arranged so as to overlap with the cover 5 in the axial direction. Particularly preferably, the support part 20 lies directly against the cover 5 and is fastened to it by means of a rear engagement connection 30. The direct abutment of the cover 5 and the support part 20 creates a particularly stable and permanent connection between these two elements. It is particularly advantageous if the spring body 18 is arranged at a distance from the elastic element 7 or its holding region 9 in the axial direction or is flush with it, but is not arranged so as to overlap in the axial direction. Accordingly, the spring body 18 is not located between the cover 5 and the support part 20 in the radial direction.

[0053] The Fig.2 shows a detailed sectional view of the bearing device 1. The above-described aspects of the bearing device 1 can be clearly seen, in particular the decoupling of the separating element 8 from the housing 21 in the form of the cover 5 and the support part 20. It can also be seen that the elastic element 7 has webs 31 that are spaced apart from one another in the circumferential direction and extend in the direction of the separating element 8 or bear against it, only a few of which are identified by way of example. The webs 31 originate, for example, from a base body 32 of the elastic element 7 and extend radially inwards. It can be provided that the separating element receiving groove 28 is only present in the webs 31, i.e. does not engage in the base body 32 or is spaced apart from it in the radial direction.Alternatively, it can of course be provided that the separating element receiving groove 28 completely passes through the webs 31 in the radial direction and projects into the base body 32.

[0054] By decoupling the separating element 8 from the housing 20 by means of the elastic element 7, an excellent damping effect is achieved. This damping effect can be adjusted via the material properties of the elastic element 7, for example, the Shore hardness of the material. The elastic element 7 is preferably made of an elastomer. Further factors influencing the damping properties are the radial distance between the separating element 8 and the housing 21, as well as the number and / or spacing of the webs 31. This results in additional, easy-to-implement tuning options for the bearing device 1.

Claims

[1] A bearing device (1), in particular for mounting a motor vehicle assembly on a motor vehicle body, comprising a fluid working chamber (2) which is in flow connection via at least one fluid channel with a fluid compensation chamber (3) present in a housing (21) of the bearing device (1), wherein the fluid working chamber (2) and the fluid compensation chamber (3) are separated by a separating element (8) in which the at least one fluid channel is present, wherein the separating element (8) is decoupled from the housing (21) by means of an elastic element (7) encompassing the separating element (8) in the circumferential direction, wherein the housing (21) has a cover (5) accommodating the fluid compensation chamber (3) and a support part (20) holding a spring body (18) of the bearing device, wherein the cover (5) engages between the support part (20) and the elastic element (7) in such a way thatthat, viewed in the radial direction with respect to a longitudinal central axis (4) of the bearing device (1), the elastic element (7), the cover (5) and the support part (20) follow one another, characterized by in that an elastic membrane (12) is fastened to the separating element (8), which membrane separates a fluid damping chamber (13) from the fluid working chamber (2) in terms of flow technology, wherein the fluid damping chamber (13) is in flow connection with an external environment (25) of the bearing device (1) via a throttle channel (24), wherein the fluid damping chamber (13) is arranged in the separating element (8) and the throttle channel (24) is formed in a projection (26) of the cover (5) which is at least partially encompassed in an annular manner by the fluid compensation chamber (3) and which projects as far as the separating element (8). [2] Storage device according to claim 1, characterized by that the elastic element (7) together with the separating element (8) encloses the fluid compensation chamber (3). [3] Storage device according to one of the preceding claims, characterized by that the separating element (8) is fastened to the housing (21) via the elastic element (7). [4] Storage device according to one of the preceding claims, characterized by in that the spring body (18) is fastened via the support part (20) in a guide recess (22) of a guide device (23), wherein the support part (20) engages between the guide device (23) and the cover (5) in such a way that, viewed in the radial direction with respect to the longitudinal center axis (4), the elastic element (7), the cover (5), the support part (20) and the guide device (23) follow one another. [5] Storage device according to one of the preceding claims, characterized by that the elastic element (7) is arranged, in particular held in a clamped manner, between the cover (5) and the support part (20) as seen in the axial direction with respect to the longitudinal central axis (4). [6] Storage device according to one of the preceding claims, characterized by that the support part (20) partially overlaps the cover (5) in the axial direction and is positively fastened to the cover (5). [7] Storage device according to one of the preceding claims, characterized by that the elastic element (7) has a separating element receiving groove (28) for the separating element (8). [8] Storage device according to one of the preceding claims, characterized by that the separating element (8) has a first part (10) and a second part (11), wherein the two parts (10, 11) are fastened to one another and / or both engage in the separating element receiving groove (28). [9] Storage device according to one of the preceding claims, characterized by that the membrane (12) is clamped between the first part (10) and the second part (11) of the separating element (8).

Images