SUBFRAME FOR A MOTOR VEHICLE

Abstract

A subframe of a front or rear region of a motor vehicle, includes two longitudinal members which are spaced apart from each other in a transverse direction of the motor vehicle and are connected with each other via at least one cross member; a stiffening structure for increasing a torsion stiffness of he subframe; and a charging module for contactless energy transfer, wherein the charging module is integrated in the stiffening structure, and is connected with the stiffening structure exclusively via decoupling bearings.

Claims

1-7. (canceled)

8. A subframe of a front or rear region of a motor vehicle, comprising: two longitudinal members which are spaced apart from each other in a transverse direction of the motor vehicle and are connected with each other via at least one cross member; a stiffening structure for increasing a torsion stiffness of he subframe; and a charging module for contactless energy transfer said charging module being integrated in the stiffening structure, and connected with the stiffening structure exclusively via decoupling bearings.

9. The subframe of claim 8, wherein the decoupling bearings are configured as rubber-metal-sleeve bearings.

10. The subframe of claim 8, wherein the charging module has a shielding plate and a coil unit, and wherein in an installed state the coil unit is geodetically arranged below the shielding plate.

11. The subframe of claim 10, wherein the shielding plate is connected with the stiffening structure via the decoupling bearings.

12. The subframe of claim 8, wherein the decoupling bearings are joined with the stiffening structure and hold the charging module via connection elements.

13. The subframe of claim 12, wherein the decoupling bearings are pressed into corresponding receptacles of the stiffening structure.

14. The subframe of claim 8, wherein the decoupling bearings are joined with the charging module and are supported on the stiffening structure via connection elements.

Description

[0017] Herein it is shown in:

[0018] FIG. 1 a lateral sectional view of a first embodiment of the subframe;

[0019] FIG. 2 a further lateral sectional view of the first embodiment of the subframe;

[0020] FIG. 3 a sectional view through a decoupling bearing of the first embodiment of the subframe;

[0021] FIG. 4 a sectional view through a decoupling bearing of a second embodiment of the subframe.

[0022] According to FIGS. 1 and 2 a subframe for the front region of a motor vehicle is made of two longitudinal members 2, which are arranged mirror symmetric with respect to the vehicle longitudinal axis and are spaced apart from each other (in the present sectional view only one longitudinal member is shown), and which are connected with each other by a cross member 3. On the thusly formed subframe 1 a stiffening structure 4, presently configured as a strut cross, is arranged for increasing the torsion stiffness. In its center the stiffening structure 4 has free surfaces. There, a charging module 5 is inserted which is made of a shielding plate 5a and a coil unit 5b. In the installed state the shielding plate 5a covers the coil unit 5b upwards. The shielding plate 5a, which is preferably made of aluminum, is at its borders screwed to decoupling bearings 6, which are in turn fixedly held in the stiffening structure 4. The decoupling bearings 6 decouple the charging module 5 from the deformations of the stiffening plate 4 during driving operation. The decoupling bearings 6 are configured as rubber-metal-sleeve bearings and are form fittingly pressed into corresponding sleeve-shaped receptacles of the stiffening structure 4. A plug 7 leads from the coil unit 5b to an energy storage unit (not shown) of the vehicle.

[0023] FIG. 3 shows a decoupling bearing 6 according to the embodiment shown in FIGS. 1 and 2 as a rubber-metal-sleeve bearing with an outer sleeve 6a, which is pressed into a receptacle 10 of the stiffening structure 4. By means of a circumferential elastomer layer 6b an inner sleeve 6c is elastically held on the outer sleeve 6a, wherein the inner sleeve 6c further has a nut 9. The nut 9 has an inner thread, which can interact with an outer thread of a connection element 8, which is configured as a screw. The shielding plate 5a of the charging module 5 is held via the connection element 8, which charging module in turn holds the coil unit 5b.

[0024] FIG. 4 shows a decoupling bearing 6 according to a second embodiment, which can analogously be used in a subframe of FIGS. 1 and 2. The decoupling bearing 6 is a rubber-metal-sleeve bearing with an outer sleeve 6a, which is pressed into a receptacle 10 of the shielding plate 5a of the charging module 5. By means of he circumferentially extending elastomer layer 6b an inner sleeve 6c is elastically held on the outer sleeve 6a. The stiffening structure 4 carries a nut 9 with an internal thread. A connection element 8, which is configured as a screw, has an outer thread, which can interact with the inner thread of the nut 9. Thus via the decoupling bearing 6 the shielding plate 5a is fastened on the stiffening structure 4 in an elastically decoupled manner, wherein the shielding plate 5a holds the coil unit 5b.

LIST OF REFERENCE SIGNS

[0025] 1 subframe [0026] 2 longitudinal member [0027] 3 cross member [0028] 4 stiffening structure [0029] 5 charging module [0030] 5a shielding plate [0031] 5b coil unit [0032] 6 decoupling bearing [0033] 6a outer sleeve [0034] 6b elastomer layer [0035] 6c inner sleeve [0036] 7 plug [0037] 8 connection element [0038] 9 nut [0039] 10 receptacle