Arrangement for mounting a drive unit and a chassis assembly on a supporting structure of a motor vehicle and motor vehicle

Abstract

The invention relates to an arrangement (10) for mounting a drive unit (12) and a chassis assembly (14) on a supporting structure of a motor vehicle, comprising a support element (20) oriented in the transverse direction (FQ) of the vehicle, on which the drive unit (12) and the chassis assembly (14) are arranged. The invention is characterized in that the support element (20) is decoupled from the supporting structure of the motor vehicle by means of two end bearings, and that the drive unit (12) is attached to the support element (20) without bearings by means of fasteners.

Description

[0001] The invention relates to an arrangement for mounting a drive unit and a chassis assembly on a supporting structure of a motor vehicle according to the type specified in the preamble of patent claim 1 and to a motor vehicle according to patent claim 10.

[0002] DE 10 2009 040 896 A1 discloses an arrangement for fastening a drive assembly in the engine compartment of a vehicle, according to which the drive assembly is arranged below a cross member supported at both ends on lateral longitudinal members of the vehicle body and is suspended from the cross member by means of a first and second assembly mount. The disclosed arrangement further provides that one or more add-on parts, such as additional electrical components and / or assemblies and / or parts of a braking system of the vehicle, can be mounted on the cross member. A known problem with the disclosed arrangement is that a relatively large amount of installation space is required due to the assembly mounts positioned between the cross member and the drive assembly, in particular due to the integration of the assembly mounts into corresponding bearing supports attached to or arranged on the housing of the drive unit.

[0003] The invention is based on the object of developing an arrangement for mounting a drive unit and a chassis assembly on a supporting structure of a motor vehicle according to the type specified in the preamble of patent claim 1 in such a way that the arrangement requires less installation space.

[0004] This problem is solved by the characterizing features of patent claim 1 in conjunction with its preamble features.

[0005] Subclaims 2 to 7 represent advantageous developments of the arrangement.

[0006] In a known manner, the arrangement for mounting a drive unit and a chassis assembly on a supporting structure of a motor vehicle comprises a support element aligned in the vehicle transverse direction FQ, on which the drive unit and the chassis assembly are arranged.

[0007] The directions used above and below refer to a vehicle-fixed coordinate system whose x-axis runs along the vehicle's longitudinal axis FL and points in the direction of travel (= forward direction), whose y-axis runs along the vehicle's transverse axis FQ and - accordingly - points to the left and whose z-axis is aligned upwards along the vehicle's vertical axis FH.

[0008] For the record, it should also be noted that the term "drive unit" refers specifically to an electric drive, and the term "chassis assembly" refers specifically to a motor-pump unit for supplying active chassis systems. However, other configurations of the drive unit and / or chassis assembly are also conceivable.

[0009] The arrangement according to the invention is characterized in that the support element, which extends in the vehicle's transverse direction FQ, is mounted decoupled from the supporting structure of the motor vehicle via two end bearings. Furthermore, the invention provides that the drive unit is attached to the support element directly via fastening means, i.e., without the interposition of a bearing, i.e., without bearings and thus, in particular, without the need for bearing supports.

[0010] The arrangement according to the invention has the effect that - since the drive unit is now decoupled from the support structure of the motor vehicle via the two end bearings and the connection of the drive unit to the support structure is designed without bearings and thus in particular also without bearing supports - the arrangement is more compact and therefore requires less installation space.

[0011] Preferably, the chassis assembly is mounted on the support element in a decoupled manner via at least one elastic bearing element. Providing a separate elastic bearing element for mounting the chassis assembly on the support element proves advantageous because the separate bearing element and the resulting more specific design of the bearing characteristic enable optimized decoupling of the chassis assembly.

[0012] An alternative design is characterized in that, like the drive unit, the chassis assembly is attached to the support element via fastening means without bearings. Bearingless means that, like the drive unit, the chassis assembly is attached directly to the support element via fastening means, i.e., without the interposition of a bearing or bearing element. This advantageously ensures a design that requires particularly little installation space.

[0013] Preferably, the end bearings, i.e., the bearings by which the support element is decoupled from the support structure of the motor vehicle, are designed as rubber-metal bearings and each comprise, in a known manner, an outer bearing sleeve, a bearing core, and an elastomer body arranged between the outer bearing sleeve and the bearing core. According to a preferred embodiment, the support element is designed with two end bearing receiving openings, wherein the outer bearing sleeves of the rubber-metal layer are each held in the end bearing receiving openings of the support element, and the bearing cores of the rubber-metal bearings are each fastened to the support structure of the motor vehicle via a fastening element. This advantageously enables simplified pre-assembly of the rubber-metal bearings with the support element.

[0014] Alternatively, for example, for packaging reasons, another embodiment is also possible. This provides that the support structure of the motor vehicle is designed with two bearing receiving openings, wherein the outer bearing sleeves of the rubber-metal bearings are each held in the bearing receiving openings of the support structure of the motor vehicle, and the bearing cores of the rubber-metal bearings are each fastened to the support element via a fastening element.

[0015] In order to ensure increased damping of the two rubber-metal bearings at the ends, these are preferably designed with hydraulic damping.

[0016] Preferably, the support element is arranged between the drive unit and the chassis assembly, viewed in the vehicle's longitudinal direction FL or in the x-direction. Depending on the configuration, the drive unit can be positioned in front of or behind the support element, and the chassis assembly can be positioned behind or in front of the support element, respectively, viewed in the vehicle's longitudinal direction FL or in the x-direction.

[0017] The invention is further based on the object of developing a motor vehicle comprising a supporting structure, a drive unit, a chassis assembly and an arrangement for mounting the drive unit and the chassis assembly on the supporting structure in such a way that as much free installation space as possible remains, which can be used in particular to accommodate further vehicle components.

[0018] The object is achieved in that the arrangement is designed according to one of claims 1 to 8.

[0019] Subclaims 9 and 10 represent advantageous developments of the motor vehicle.

[0020] Since - as already explained - the arrangement according to the invention ensures a compact, space-saving arrangement of the drive unit and the chassis assembly, the motor vehicle according to the invention is now advantageously characterized in that more installation space is available for accommodating other or additional vehicle components.

[0021] Preferably, the support structure, on which the support element is decoupled via the two end bearings, is the longitudinal members of a frame structure of the motor vehicle, aligned in the vehicle's longitudinal direction FL or, as viewed in the x-direction. An alternative embodiment provides for the support structure to be a subframe attached to a frame structure of the motor vehicle, in particular the subframe longitudinal members extending in the vehicle's longitudinal direction FL or, as viewed in the x-direction.

[0022] Further advantages and possible applications of the invention will become apparent from the following description in conjunction with the embodiments shown in the drawing.

[0023] In the drawing: Fig. 1 a plan view of an arrangement according to the invention according to a first embodiment; Fig. 2 shows a second embodiment of the arrangement according to the invention in a plan view; Fig. 3 a third embodiment of the arrangement according to the invention in a plan view, and Fig. 4 a plan view of a fourth embodiment of the arrangement according to the invention.

[0024] In the following description and in the figures, to avoid repetition, identical parts and components are marked with the same reference symbols unless further differentiation is necessary or useful.

[0025] Fig. 1 to Fig. 4 show in a schematic representation in a plan view an arrangement, designated overall by the reference number 10, for mounting a drive unit 12 and a chassis assembly 14 on a supporting structure of a motor vehicle.

[0026] In the present case, the supporting structure of the motor vehicle is designed in the form of a subframe, of which - for reasons of clarity - only the end region of the two subframe longitudinal members extending in the vehicle longitudinal direction FL or in the x-direction are shown and designated by the reference number 16.

[0027] The chassis unit 14 is a motor-pump unit for supplying an active chassis system of the motor vehicle. For this purpose, as shown in Fig. 1 to Fig. 4 schematically shown - the chassis unit 14 is fluidically connected to active dampers 18 of the motor vehicle via hydraulic lines 14-1 and line transfer points 14-2.

[0028] How Fig. 1 to Fig. 4, the arrangement 10 comprises a support element 20 oriented in the vehicle transverse direction FQ or y-direction, which is mounted decoupled from the subframe longitudinal member 16 via two end-side rubber-metal bearings 22-1, 22-2, shown only schematically here. The rubber-metal bearings 22-1, 22-2, which support the support element 20 in a decoupled manner on the subframe, each comprise - even if not explicitly shown here - an outer bearing sleeve, a bearing core, and an elastomer body arranged between the outer bearing sleeve and the bearing core.

[0029] A characteristic of the arrangement 10 according to the invention is that the drive unit 12, e.g., in the form of an electric drive, is attached directly to the support element 20 via fastening means, i.e., without the interposition of a bearing. The decoupling of the drive unit 12 is achieved by the rubber-metal bearings 22-1, 22-2 supporting the support element 20. Due to the bearingless attachment of the drive unit 12 to the support element 20, the arrangement 10 according to the invention is very compact.

[0030] According to the Fig. 1, the chassis assembly 14 is mounted decoupled from the support element 20 via two bearing elements 24. In addition, as Fig. 1, the rubber-metal bearings 22-1, 22-2 are arranged on the support element side. This means that the outer bearing sleeves of the rubber-metal bearings 22-1, 22-2 are held in respective bearing receiving openings formed on the support element 20, and the bearing cores are fastened to the subframe or to the subframe longitudinal members 16 via corresponding fastening elements.

[0031] The Fig. The second embodiment shown in Figure 2 corresponds to the one shown in Figure 2 except for a different arrangement of the rubber-metal bearings 22-1, 22-2. Fig. 1. According to the second embodiment, the rubber-metal bearings 22-1, 22-2 are now arranged on the subframe side or the subframe longitudinal member side. This means that the outer bearing sleeves of the rubber-metal bearings 22-1, 22-2 are held in respective bearing receiving openings formed on the subframe longitudinal member 16, and the bearing cores are fastened to the support element 20 via corresponding fastening elements.

[0032] Characteristic of the Fig. 3 and Fig. 4 is that the chassis assembly 14 is now also attached directly, i.e., without bearings, to the support element 20. This allows for an even more compact arrangement. The arrangement of the rubber-metal bearings 22-1, 22-2 can again be on the support element side, see FIG. Fig. 3, or subframe side, cf. Fig. 4, take place. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2009 040 896 A1

[0002]

Claims

[1] Arrangement (10) for mounting a drive unit (12) and a chassis assembly (14) on a supporting structure of a motor vehicle, comprising a support element (20) aligned in the vehicle transverse direction (FQ) on which the drive unit (12) and the chassis assembly (14) are arranged, characterized by that the support element (20) is mounted decoupled from the support structure of the motor vehicle via two end bearings, and that the drive unit (12) is fastened to the support element (20) without bearings via fastening means. [2] Arrangement (10) according to claim 1, characterized by that the chassis unit (14) is decoupled from the support element (20) via at least one bearing element (24). [3] Arrangement (10) according to claim 1, characterized by that the chassis unit (14) is fastened to the support element (20) without bearings via fastening means (). [4] Arrangement (10) according to one of claims 1 to 3, characterized bythat the end bearings are designed as rubber-metal bearings (22-1, 22-2), each comprising an outer bearing sleeve, a bearing core and an elastomer body arranged between the outer bearing sleeve and the bearing core, and that the carrier element (20) is designed to have two end bearing receiving openings, wherein the outer bearing sleeves of the rubber-metal bearings (22-1, 22-2) are each held in the end bearing receiving openings of the carrier element (20) and the bearing cores of the rubber-metal bearings (22-1, 22-2) are each fastened to the supporting structure of the motor vehicle via a fastening element. [5] Arrangement (10) according to one of claims 1 to 3, characterized byin that the end bearings are designed as rubber-metal bearings (22-1, 22-2), each comprising an outer bearing sleeve, a bearing core and an elastomer body arranged between the outer bearing sleeve and the bearing core, and in that the support structure of the motor vehicle is designed to have two bearing receiving openings, wherein the outer bearing sleeves of the rubber-metal bearings (22-1, 22-2) are each held in the bearing receiving openings of the support structure of the motor vehicle and the bearing cores of the rubber-metal bearings (22-1, 22-2) are each fastened to the carrier element (20) via a fastening element. [6] Arrangement (10) according to claim 4 or 5, characterized by that the rubber-metal bearings (22-1, 22-2) have hydraulic damping. [7] Arrangement (10) according to claim 1, characterized by that, viewed in the vehicle longitudinal direction (FL), the support element (20) is positioned between the drive unit (12) and the chassis assembly (14). [8] Motor vehicle, comprising a supporting structure, a drive unit (12), a chassis assembly (14) and an arrangement (10) for mounting the drive unit (12) and the chassis assembly (14) on the supporting structure, characterized by that the arrangement (10) is designed according to one of claims 1 to 7. [9] Motor vehicle according to claim 8, further comprising a frame structure with longitudinal members aligned in the longitudinal direction (FL), characterized by that the supporting structure consists of the longitudinal members of the frame structure. [10] Motor vehicle according to claim 8, further comprising a frame structure with longitudinal members aligned in the longitudinal direction (FL) and a subframe attached to the frame structure, characterized by that the supporting structure is the subframe attached to the frame structure.

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