Vehicle assembly mounting assembly and modular system

Abstract

Vehicle assembly fastening assembly (10) for the vibration-capable fixing of a vehicle assembly (11) to a vehicle structure of a motor vehicle, with at least one unit-side first support element (12) and a vehicle-side second support element (14), wherein the first support element (12) and the second support element (14) are connected to one another by a vibration damper (16) which is arranged at least partially in the first support element (12) or in the second support element (14), wherein the vibration damper (16) is fluidly connected to a hydraulic unit (22) through a flow channel (24), which is arranged next to the vibration damper (16) in a plan view of the vibration damper (16) characterized in that the support element (12, 14) receiving the vibration damper (16) has two adjacent recesses (32, 34), wherein the vibration damper (16) and the hydraulic unit (22) are each received in an associated recess (32, 34), wherein the recesses (32, 34) are covered at least on one side by a cover (38) which, together with the associated support element (12, 14), forms at least part of the flow channel (24) and that the support element (12, 14) receiving the vibration damper (16) is designed to form a connection with the vehicle assembly (11) or the vehicle structure.

Description

[0001] The present invention relates to a vehicle assembly fastening assembly for the vibration-capable fixing of a vehicle assembly, in particular an engine and / or transmission, to a vehicle structure of a motor vehicle and a modular system with a vibration damper.

[0002] Hydraulic mounts are well-known for the vibration-resistant mounting of vehicle components. These mounts simultaneously secure a vehicle component, for example, to a body, and decouple the vibrations of the vehicle component. Hydraulic mounts are typically prefabricated as a single unit. Since such hydraulic mounts have a certain height due to the presence of the hydraulic unit, they can only be used where sufficient installation space is available. The installation space constraints often pose a challenge, particularly in the engine and transmission areas.

[0003] JP S56-120 838 A deals with a fluid-sealed vibration-free device. DE 199 30 726 C1 deals with a hydraulically damping mount. EP 0 787 924 B1 deals with improvements to a hydraulic anti-vibration device. DE 10 2015 224 937 A1 deals with a hydraulic mount and a motor vehicle with such a hydraulic mount.

[0004] It is therefore an object of the present invention to provide a vehicle assembly fastening assembly for the vibration-capable fixing of a vehicle assembly to a vehicle structure of a motor vehicle, which is optimized with regard to the installation space requirements.

[0005] This object is achieved according to the invention by a vehicle assembly fastening assembly for the vibration-capable fixing of a vehicle assembly, in particular an engine and / or transmission, to a vehicle structure of a motor vehicle, having at least one assembly-side first support element and a vehicle-side second support element, wherein the first support element and the second support element are connected to one another by a vibration damper which is arranged at least partially in the first support element or in the second support element, wherein the vibration damper is fluidly connected to a hydraulic unit via a flow channel which, in a plan view of the vibration damper, is arranged next to the vibration damper. In particular, the vibration damper and the hydraulic unit are arranged non-overlapping in a plan view of the vibration damper.A top view of the vibration damper refers to a view in the axial direction of the vibration damper. The axial direction is the direction in which the main load is applied to the vibration damper when the assembly according to the invention is installed and the vehicle and engine are stationary.

[0006] By arranging the hydraulic unit next to the vibration damper, the overall height of the vehicle assembly mounting assembly is advantageously reduced, so that the mounting assembly can be more easily integrated into an installation space environment depending on the installation space situation.

[0007] The vibration damper also transmits the bearing forces that are introduced from the vehicle assembly into the vehicle structure.

[0008] Furthermore, the vehicle assembly mounting assembly according to the invention provides a central connection option through the vibration damper. This largely prevents the introduction of a transverse force into the vehicle body and / or the vehicle assembly under torque load.

[0009] The vehicle-side support element is, for example, firmly connected to the vehicle body. For example, the vehicle-side support element is a transmission cross member. The engine-side support element can be firmly connected to the vehicle engine or be a component of the vehicle engine.

[0010] According to one embodiment, the vibration damper comprises a bearing core and a suspension spring, in particular a suspension spring that at least partially encloses the bearing core. The bearing core is preferably made of a dimensionally stable material, for example, metal, while the suspension spring can be made of an elastic material. This provides the vibration damper with the necessary dimensional stability, or rather, allows the vibration damper to ensure stable mounting while simultaneously absorbing sufficient vibrations.

[0011] Particularly preferably, the suspension spring is vulcanized to the bearing core. This allows the connection between the suspension spring and the bearing core to be particularly stable and durable.

[0012] The support element accommodating the vibration damper can have two adjacent recesses, one of which accommodates the vibration damper and the other the hydraulic unit. The recesses are covered at least on one side by a cover, which, together with the associated support element, forms at least part of the flow channel. The flow channel can therefore be easily formed by attaching the cover. At the same time, the cover securely holds the vibration damper and the hydraulic unit in the support element. Overall, the fastening assembly can thus be designed particularly simply and cost-effectively.

[0013] In addition, the flow channel can be partially formed by the hydraulic unit, in particular by a nozzle channel of a nozzle disc of the hydraulic unit.

[0014] At least the recess in which the vibration damper is accommodated can be continuous in the axial direction of the vibration damper. The vibration damper can thus protrude from the first support element in the direction of the second support element, so that the second support element can be easily connected to the first support element to provide a vibration-resistant mounting for a vehicle assembly.

[0015] The recess receiving the vibration damper is preferably designed in a step-like manner, wherein the step forms a stop for the vibration damper in the axial direction of the vibration damper in order to hold the vibration damper captively in the support.

[0016] According to one embodiment, the vibration damper and the hydraulic unit are mounted together in a separate housing that is attached to one of the support elements. This embodiment has the advantage that the vibration damper and the hydraulic unit can be pre-assembled in the separate housing and thus provided as a prefabricated assembly and mounted in one of the support elements. This facilitates handling during final assembly and can reduce the cycle time for assembling the vehicle assembly mounting assembly. For example, the vibration damper and the hydraulic unit can be delivered in a pre-assembled state. Furthermore, maintenance or replacement of the vibration damper and the hydraulic unit can be simplified.

[0017] The vibration damper is mounted, for example, on the support element or the separate housing by a bearing ring. The bearing ring allows the vibration damper to be held in a defined position in the support element when the cover is attached to the support element. In particular, the vibration damper is held in place at one axial end by the bearing ring.

[0018] The bearing ring is preferably firmly connected to the vibration damper, for example by vulcanizing the suspension spring to the bearing ring.

[0019] According to one embodiment, the bearing ring can be shaped such that it additionally forms at least part of the hydraulic unit, in particular at least part of a nozzle disc with a nozzle channel. In this way, the vehicle assembly mounting assembly can have particularly few components and can therefore be manufactured particularly cost-effectively.

[0020] In particular, part of the bearing ring together with part of the cover forms a multi-part nozzle disc.

[0021] According to one embodiment, the flow channel runs essentially linearly between the vibration damper and the hydraulic unit. This prevents flow eddies of a hydraulic fluid in the flow channel. In this case, the hydraulic unit can be approached from below when the suspension spring is subjected to pressure.

[0022] Alternatively, the flow channel between the vibration damper and the hydraulic unit can have a step. In this case, the hydraulic unit can be supplied with air from above when the suspension spring is subjected to pressure.

[0023] The bearing core can be part of a stop system, whereby the bearing core can abut against at least one of the two support elements. In particular, the bearing core can abut against the support element in which the bearing core is accommodated. The bearing core does not have to come into direct contact with the support element; the bearing core can also be covered by the material of the suspension spring at the contact point.

[0024] Preferably, the bearing core is cross-shaped or T-shaped when viewed in longitudinal section. This provides a suitable stop when the vibration damper moves in the axial and / or radial directions. However, other bearing core geometries are also conceivable, for example, spherical or cuboid geometries.

[0025] The hydraulic unit may comprise a diaphragm that is moved during driving by hydraulic fluid present in the vehicle's mounting assembly. This has a positive effect on the acoustics of the vehicle's mounting assembly.

[0026] The invention is further achieved by a modular system comprising a vibration damper and a hydraulic unit, wherein the vibration damper can be used either together with the hydraulic unit as a vehicle assembly fastening assembly as described above, in particular as a hydraulic vibration damper, or without the hydraulic unit as a mount for fastening the vehicle assembly to the vehicle structure. The vibration damper can thus be used particularly flexibly. The fact that the vibration damper can be used equally in different mounting situations can also have a positive effect on the overall manufacturing costs of a vehicle. In particular, variant costs can be reduced.

[0027] Further advantages and features of the invention will become apparent from the following description and the accompanying drawings, to which reference is made. In the drawings: - Fig. 1 a vehicle assembly fastening assembly according to the invention in a sectional view, - Fig. 2 to 5 each show further embodiments of a vehicle assembly fastening assembly according to the invention, - Fig. 6a to 6c show various vibration dampers of the vehicle assembly mounting assembly according to the invention and - Fig. 7 a vibration damper in a conventional bearing.

[0028] Fig. Figure 1 shows a sectional view of a vehicle assembly mounting assembly 10. The vehicle assembly mounting assembly 10 is suitable for the vibration-resistant mounting of a vehicle assembly 11, in particular an engine and / or transmission, to a vehicle structure of a motor vehicle.

[0029] The vehicle assembly fastening assembly 10 comprises an assembly-side support element 12 and a vehicle-side support element 14 as well as a vibration damper 16 which connects the two support elements 12, 14 to one another in terms of force and simultaneously dampens relative movements.

[0030] The vibration damper 16 comprises a bearing core 18 and a suspension spring 20. The suspension spring 20 is preferably made of an elastic material. This allows the vibration damper 16 to deform during driving and absorb the vibrations of the vehicle assembly 11 during driving.

[0031] The unit-side support element 12 is, for example, a component of the vehicle unit 11, in particular a housing of the vehicle unit 11.

[0032] The vehicle-side support element 14 is, for example, an engine support or a transmission cross member.

[0033] In the exemplary embodiments shown, the vibration damper 16 is partially mounted in the vehicle-side support element 14; in particular, the support element 14 serves as a receiving housing for the vibration damper 16.

[0034] In principle, the vibration damper 16 can also be mounted in the support element 12 on the unit side.

[0035] A hydraulic unit 22 is arranged next to the vibration damper 16, as viewed in a top view of the vibration damper 16. As can be seen from the figures, this reduces the overall height in the axial direction, so that the fastening assembly 10 can be easily installed in installation spaces with limited vertical space.

[0036] The vibration damper 16 and the hydraulic unit 22 are fluidly connected by a flow channel 24 in which a hydraulic fluid is present. Fig. In the embodiment shown in Figure 1, the flow channel 24 runs linearly between the vibration damper 16 and the hydraulic unit.

[0037] The hydraulic unit 22 comprises a rolling bellows 26, a diaphragm 28, and a nozzle disc 30, which can be a single or multi-part assembly. The rolling bellows 26 can deform to absorb hydraulic fluid displaced by a movement of the vibration damper 16. Furthermore, the rolling bellows 26 seals the hydraulic unit 22 from the support element 14.

[0038] A vibration damper 16 in combination with a hydraulic unit 22 allows a vehicle assembly to be mounted particularly effectively. The vibration damper supports the entire static weight of the vehicle assembly 11, and in combination with the hydraulic fluid, vibrations during relative movements between the vehicle assembly and a vehicle structure are particularly well damped.

[0039] In order to mount the vibration damper 16 and the hydraulic unit 22 reliably and in a space-optimized manner, recesses 32, 34 in the form of geometrically arbitrarily designed pockets are provided in the support element 14, with the vibration damper 16 and the hydraulic unit 22 each being arranged in a recess 32, 34. The recess 32, which accommodates the vibration damper 16, extends axially continuously through the support element 14. The recess 32 is stepped to securely mount the vibration damper 16. In addition, the axial recess 32 allows the required freedom of movement in the axial, longitudinal, and transverse directions of the vibration damper 16 when the vibration damper 16 is properly mounted in the support element 14.

[0040] The vibration damper 16 protrudes from the support element 14, in particular from the recess 32, at least on one side facing the unit-side support element 12. In particular, a fastening section 36 of the vibration damper 16 protrudes from the support element 14. This allows the vibration damper 16 to be easily connected to the support element 12, for example, by means of screws.

[0041] On a side facing away from the support element 12, the recesses 32, 34 are covered by a cover 38. The cover 38 can be attached to the support element 14 in a suitable manner, for example by screwing, gluing, fitting, locking, or other means.

[0042] The cover 38 forms, together with the support element 14, the flow channel 24 and can also serve to fasten the vibration damper 16 to the support element 14.

[0043] In order to easily attach the vibration damper 16 to the support element 14, a bearing ring 40 is provided. This bearing ring is connected to the vibration damper 16 by means of the support spring 20, which is vulcanized, in particular, to the bearing ring 40.

[0044] The bearing ring 40 can be attached to the support element 14 in a suitable manner, for example by screwing, gluing, fitting, or locking. In the illustrated embodiment, the bearing ring 40 is held by the cover 38, specifically by clamping the bearing ring 40 between the cover 38 and the support element 14.

[0045] A hydraulic chamber 41 formed between the underside of the vibration damper 16 and the cover 38, into which the flow channel 24 opens, is sealed by the bearing ring 40.

[0046] To limit the range of movement of one of the vehicle components 11, a stop system 42 is provided. This is necessary to prevent the vehicle component 11 from striking adjacent components during driving.

[0047] In the illustrated embodiment, the bearing core 18 is part of the stop system 42, whereby the bearing core 18 can abut the support element 14. Such a stop system 42 has the advantage that no additional components are required to form the stop system 42. Consequently, the fastening assembly 10 can be particularly cost-effective. Only a suitable geometry for the bearing core 18 must be selected.

[0048] In Fig. 1, the bearing core 18 is cross-shaped in a longitudinal section. However, other suitable geometries are also conceivable. For example, the bearing core 18 can be T-shaped in section, as in Fig. 6b.

[0049] In order to seal the fastening assembly 10, in particular the flow channel 24, from the outside, a seal 44 is arranged between the cover 38 and the bearing ring 40.

[0050] Fig. 2 shows a further embodiment of a vehicle assembly fastening assembly 10 according to the invention in a sectional view.

[0051] In contrast to the Fig. In the embodiment shown in Figure 1, the vibration damper 16 and the hydraulic unit 22 are not arranged directly in the support element 14, but are preassembled in a separate inner housing 46. This can simplify handling during assembly.

[0052] The housing 46 is disc-shaped and has two recesses for receiving the vibration damper 16 and the hydraulic unit 22.

[0053] In addition, the housing 46 has a circumferential collar 52 that extends radially outward. This serves as a stop for mounting the housing 46 in a defined position on the support element 14.

[0054] In addition, a radially inwardly projecting collar 54 is provided, which serves as a stop for the vibration damper 16 and the hydraulic unit 22. The vibration damper 16 and the hydraulic unit 22 can thus be easily inserted into the housing 46.

[0055] The pre-assembled unit can in turn be fastened to the support element 14 by the cover 38 and inserted into one of the support elements.

[0056] Fig. Figure 3 schematically shows a further embodiment of a vehicle assembly fastening assembly 10 according to the invention in a sectional view. The vehicle assembly fastening assembly 10 is similar to the vehicle assembly fastening assembly 10 according to Fig. 1.

[0057] However, in the embodiment according to Fig. 3 the bearing ring 40 is at least partially covered by the material of the suspension spring 20 on its contact surfaces 56, 58 facing the support element 14 and the cover 38. This has the advantage that an additional seal 44 can be omitted, since the material of the suspension spring 20 arranged on the bearing ring 40 ensures sufficient sealing.

[0058] Alternatively or additionally, the rolling bellows 26 can be formed by the material of the support spring 20 at the same time, so that the rolling bellows 26 is one piece with the support spring 20. This is in Fig. 3 shown.

[0059] Fig. 4 schematically shows a further embodiment of a vehicle assembly fastening assembly 10 according to the invention in a sectional view.

[0060] In contrast to the previously shown embodiments, the flow channel 24 between the vibration damper 16 and the hydraulic unit 22 has a step 60. The hydraulic unit 22 can therefore be flowed from a different side than the vibration damper 16.

[0061] In a further embodiment, which is not shown for the sake of simplicity, the hydraulic unit 22 can be Fig. The hydraulic units shown in Figures 1 to 3 can be arranged at an angle, in particular tilted by 90°. In this way, the vehicle assembly mounting assembly 10 can be adapted to various installation space situations.

[0062] Fig. 5 schematically shows a further embodiment of a vehicle assembly fastening assembly 10 according to the invention in a sectional view.

[0063] In contrast to the previously shown embodiments, the bearing ring 40 and the cover 38 are shaped such that together they form a nozzle disc 30 with a nozzle channel 48. The bearing ring 40 forms a first part and the cover 38 a second part of the nozzle disc 30.

[0064] As a result, the nozzle disc 30 can be integrated into existing components, whereby the vehicle assembly fastening assembly 10 can be designed particularly cost-effectively.

[0065] The Fig. 6a to 6c show, in a schematically simplified sectional view, various possible forms of a vibration damper 16, in particular a bearing core 18 and a suspension spring 20.

[0066] The bearing cores 18 according to Fig. 6a and Fig. 6c are cross-shaped in section, while the bearing core 18 according to Fig. 6b is T-shaped. The support spring 20 is arranged in a suitable manner on the bearing core 18.

[0067] Fig. 7 shows the vibration damper 16 from Fig. 1 in a support, wherein the vibration damper 16 is mounted without a hydraulic unit 22. Without the hydraulic unit 22, the vibration damper 16 serves as a conventional bearing.

[0068] The vibration damper 16 can thus be part of a modular system and can be used either together with the hydraulic unit 22 as a hydraulic vibration damper or without the hydraulic unit 22 as a conventional bearing.

Claims

[1] Vehicle assembly mounting assembly (10) for the vibration-capable fixing of a vehicle assembly (11) to a vehicle structure of a motor vehicle, with at least one unit-side first support element (12) and a vehicle-side second support element (14), wherein the first support element (12) and the second support element (14) are connected to one another by a vibration damper (16) which is arranged at least partially in the first support element (12) or in the second support element (14), wherein the vibration damper (16) is fluidly connected to a hydraulic unit (22) through a flow channel (24), which is arranged next to the vibration damper (16) in a plan view of the vibration damper (16) characterized by , that the support element (12, 14) receiving the vibration damper (16) has two adjacent recesses (32, 34), wherein the vibration damper (16) and the hydraulic unit (22) are each received in an associated recess (32, 34), wherein the recesses (32, 34) are covered at least on one side by a cover (38) which, together with the associated support element (12, 14), forms at least part of the flow channel (24) and that the support element (12, 14) receiving the vibration damper (16) is designed to form a connection with the vehicle assembly (11) or the vehicle structure. [2] Vehicle assembly mounting assembly (10) according to claim 1, characterized by that the vibration damper (16) comprises a bearing core (18) and a support spring (20), in particular a support spring (20) at least partially enclosing the bearing core (18). [3] Vehicle assembly mounting assembly (10) according to one of the preceding claims, characterized by that the vibration damper (16) and the hydraulic unit (22) are mounted together in a separate housing (46) which is fastened to one of the support elements (12, 14). [4] Vehicle assembly mounting assembly (10) according to one of the preceding claims, characterized by that the vibration damper (16) is mounted on the support element (12, 14) or a separate housing (46) by a bearing ring (40). [5] Vehicle assembly mounting assembly (10) according to claim 4, characterized by that the bearing ring (40) forms at least part of the hydraulic unit (22), in particular at least part of a nozzle disc (30). [6] Vehicle assembly mounting assembly (10) according to one of the preceding claims, characterized bythat the flow channel (24) runs substantially linearly between the vibration damper (16) and the hydraulic unit (22). [7] Vehicle assembly mounting assembly (10) according to one of claims 1 to 5, characterized by that the flow channel (24) between the vibration damper (16) and the hydraulic unit (22) has a step. [8] Vehicle assembly mounting assembly (10) according to one of claims 2 to 7, characterized by that the bearing core (18) is part of a stop system (42), wherein the bearing core (18) can abut against at least one of the two support elements (12, 14). [9] Vehicle assembly mounting assembly (10) according to claim 8, characterized by that the bearing core (18) is cross-shaped or T-shaped when viewed in a longitudinal section. [10] Modular system with a vibration damper (16) and a hydraulic unit (22), wherein the vibration damper (16) can be used optionally together with the hydraulic unit (22) as a vehicle assembly fastening assembly according to one of the preceding claims or without the hydraulic unit (22) as a bearing for fastening the vehicle assembly to the vehicle structure.

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