Fastening system and motor vehicle with such a fastening system

Abstract

Fastening system comprising at least one chassis component (200) for a motor vehicle (100), at least one suspension component (400) for the motor vehicle (100), a first fastening element (201), a second fastening element (202), and an electrical conductor (401), wherein the electrical conductor (401) is electrically connected to the chassis component (200) and the first fastening element (201), and wherein the electrical conductor (401) is attached to the first fastening element (201) by the second fastening element (202) being screwed into the first fastening element (201), characterized in that the suspension component (400) can be fastened to the chassis component (200) by the first fastening element (201), wherein the fastening system has a third fastening element (203) with which the suspension component (400) can be fastened to the first fastening element (201). can be attached,wherein the third fastening element (203) is screwed into the first fastening element (201).

Description

[0001] The invention relates to a fastening system according to the preamble of claim 1.

[0002] The fastening system is used to establish a ground connection between the chassis and the frame. A reliable ground connection between the body and chassis is particularly important for hybrid body constructions made of multiple materials (e.g., aluminum, steel, and / or plastic).

[0003] From DE 10 2011 051 137 A1, a fastening element for a vehicle body structure is known, consisting of a blind rivet nut and a screwed-in fastening screw. Grounding shoes are clamped between the blind rivet nut and the head of the fastening screw.

[0004] From DE 10 2009 015 915 A1 a motor vehicle is known in which a ground bolt is made of aluminium, which is welded to a front longitudinal member also made of aluminium.

[0005] From DE 10 2008 029 993 A1, a device for attaching a ground wire is known. It has a connecting eyelet which is attached to the body part by means of a screw-nut connection.

[0006] From DE 20 2011 004 721 U1, an electrically conductive screw connection between two parts screwed together by a screw with a screw head and a shank with an external thread and a nut is known. The screw passes through a bore in one part. The electrical contact between the other part and the screw is established by teeth on the workpiece-side surface of the screw head and / or the nut, or by a washer arranged between the nut and the other part, while the contact between the screw and the one part is established by a bushing that is radially elastic and arranged coaxially to the shank of the screw in a section of the bore with an enlarged inner diameter.

[0007] From DE 10 2005 055 591 A1, an assembly for a steering system of a vehicle is known, which makes it possible to enable an electrical ground connection of a steering gear to the frame of a vehicle.

[0008] In contrast, the invention aims to improve the ground connection between the chassis and the frame with relatively little assembly effort. Furthermore, it seeks to create a motor vehicle equipped with such a fastening system.

[0009] This problem is solved by a fastening system according to claim 1 and by a motor vehicle according to claim 9. Embodiments of the invention are specified in the dependent claims.

[0010] The fastening system comprises a chassis component for a motor vehicle and a suspension component for the motor vehicle. For the purposes of this description, a chassis component is understood to be, in particular, a load-bearing component of the chassis. This could be, for example, a longitudinal member. The chassis can, in particular, be part of the motor vehicle's body. For the purposes of this description, a suspension component is understood to be, in particular, a component of the suspension to which the wheel suspensions can be attached. For example, the suspension component could be a subframe.

[0011] Furthermore, the fastening system comprises a first fastening element, a second fastening element, and an electrical conductor. The second fastening element can be screwed into the first fastening element. The electrical conductor can be electrically connected to the chassis component and the first fastening element. The electrical conductor can be attached to the first fastening element by screwing the second fastening element into the first fastening element. The chassis component can be attached to the chassis component using the first fastening element.

[0012] In this description, an electrical conductor is understood to be a component that is electrically conductive. It serves to electrically connect the chassis component to the first fastening element, thus establishing a ground connection between these components. Both the first and second fastening elements are electrically conductive. Therefore, when the electrical conductor is attached to the first fastening element via the second fastening element, the chassis component is electrically connected to the running gear component. This ensures a reliable ground connection between the chassis and running gear. The fastening elements are used not only to establish this ground connection but also to fasten the running gear component to the chassis component. Thus, the fastening elements fulfill at least two functions.This allows for a particularly simple and reliable ground connection without significantly increasing the assembly effort.

[0013] The fastening system includes a third fastening element with which the chassis component can be attached to the first fastening element. The third fastening element can be screwed into the first fastening element. Preferably, the second fastening element can be screwed into a first end region of the first fastening element, while the third fastening element can be screwed into a second end region of the first fastening element, which is opposite the first end region.

[0014] According to one embodiment of the invention, the first fastening element can be made of steel. Steel is a particularly suitable material because it is conductive and stable. This allows for a good electrical connection and a reliable fastening.

[0015] According to one embodiment of the invention, the first fastening element can be designed as a bushing. In this case, the bushing has an internal thread into which the second fastening element can be screwed. The first fastening element can also be a bushing that has already been used in the prior art for fastening the chassis to the frame.

[0016] According to one embodiment of the invention, the second fastening element can be designed as a screw. The screw is particularly well suited for attaching the electrical conductor to the first fastening element.

[0017] According to one embodiment, the electrical conductor can be attached to the chassis component. In this way, a reliable ground connection can be achieved.

[0018] According to one embodiment of the invention, the second fastening element can be configured to exert a clamping force on the electrical conductor when attached to the first fastening element. Thus, when screwed into the second fastening element, the first fastening element can exert a clamping force on the electrical conductor to achieve a reliable ground connection.

[0019] According to one embodiment of the invention, the third fastening element can be made of steel.

[0020] According to one embodiment of the invention, the third fastening element can be designed as a screw. This is particularly advantageous if the first fastening element is designed as a bushing.

[0021] Further features and advantages of the present invention will become clear with reference to the following description of preferred embodiments and the accompanying figures. The same reference numerals are used for components with the same or similar functions and for identical or similar components. Fig. Figure 1 shows a schematic perspective partial view of the rear of a motor vehicle. Fig. Figure 2 shows an enlarged section from Fig. 1. Fig. Figures 3a to 3c show the first and second fastening element. Fig. Figure 4 shows a schematic cross-sectional view of a fastening system according to one embodiment of the invention.

[0022] The in the Fig. 1 and Fig. The rear of motor vehicle 100, as shown in Figure 2, has a longitudinal member 200 as a chassis component. A bushing 201 projects through the longitudinal member 200 as the first fastening element, into which a screw 202 can be screwed from above as the second fastening element. A further screw 203 can be screwed into the bushing 201 from below. A chassis component (in) is fastened by means of the bushing 201. Fig. 1 and Fig. (2 not shown) is attached to the longitudinal beam 200. The two screws 202 and 203 and the bushing 201 are preferably made of steel.

[0023] Socket 201 is in the Fig. 3a to 3c are shown again individually. It has a lower section to which the chassis component is attached. Screw 202 is screwed into the upper section.

[0024] In Fig. Figure 4 shows how the chassis component 400 is attached to the longitudinal member 200 using the bushing 201. The chassis component 400 can, for example, be a bogie. A metal tab 401 is also shown as an electrical conductor. The metal tab 401 is clamped between the screw 202 and the bushing 201. The metal tab is also attached to the longitudinal member 200. The screw 203 is in Fig. 4 not shown. It is screwed into the bushing 201 from below through the chassis component 400.

[0025] The metal tab 401, the screw 202 and the screw 203 create a reliable ground connection between the longitudinal beam 200 and the chassis component 400.

Claims

[1] Fastening system comprising at least one chassis component (200) for a motor vehicle (100), at least one chassis component (400) for the motor vehicle (100), a first fastening element (201), a second fastening element (202) and an electrical conductor (401), wherein the electrical conductor (401) is electrically connected to the chassis component (200) and the first fastening element (201), and wherein the electrical conductor (401) is attached to the first fastening element (201) by screwing the second fastening element (202) into the first fastening element (201), characterized by, that the chassis component (400) can be attached to the chassis component (200) by means of the first fastening element (201), wherein the fastening system has a third fastening element (203) with which the chassis component (400) can be attached to the first fastening element (201), wherein the third fastening element (203) is screwed into the first fastening element (201). [2] Fastening system according to claim 1, characterized by , that the first fastening element (201) and / or the second fastening element (202) is made of steel. [3] Fastening system according to any one of the preceding claims, characterized by , that the first fastening element (201) is designed as a bushing. [4] Fastening system according to at least one of the preceding claims, characterized by , that the second fastening element (202) is designed as a screw. [5] Fastening system according to at least one of the preceding claims, characterized by, that the electrical conductor (401) can be attached to the chassis component (200). [6] Fastening system according to at least one of the preceding claims, characterized by , that the second fastening element (202) is designed to exert a clamping force on the electrical conductor (401) in the state attached to the first fastening element (201). [7] Fastening system according to any one of the preceding claims, characterized by , that the third fastening element (203) is made of steel. [8] Fastening system according to any one of the preceding claims, characterized by , that the third fastening element (203) is designed as a screw. [9] Motor vehicle (100) comprising a fastening system according to at least one of the preceding claims, the chassis component (200) and the suspension component (400).

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