Auxiliary frame for vehicle, in particular electric vehicle

Abstract

The invention relates to an auxiliary frame for a vehicle, in particular an electric vehicle, with a longitudinal member composed of metal sheets, which has bearing connection points for a transversecontrol arm connection, the bearing connection points being formed in a bearing section of the longitudinal member which is open towards the wheel carrier side, wherein the bearing section is formed from a first single-shell metal sheet and a second single-shell metal sheet, wherein the second single-shell metal sheet is connected to the first single-shell metal sheet by means of a weld seam, wherein the first single-shell metal sheet has at least one of the bearing connection points, and wherein the second single-shell metal sheet has at least one of the bearing connection points. In order for the auxiliary frame to have a significantly higher stability, in particular higher bending strength and / or rigidity, with the same or only slightly increased weight, the invention provides that thefirst single-shell metal sheet, when viewed in cross-section, has a substantially Z-shaped shell section which has a profile section facing the wheel carrier side, a profile section facing away from the wheel carrier side and a profile section which connects the two profile sections to one another in one piece and is substantially upright in the assembled state of the auxiliary frame, wherein theweld seam is arranged at a distance from the substantially upright profile section on the profile section facing away from the wheel carrier side.

Description

technical field [0001] The invention relates to a subframe, in particular a front axle subframe, for a motor vehicle, in particular an electric vehicle, which has a longitudinal support consisting of a plurality of sheet metal plates, which has bearing connection points for the connection of a transverse link , wherein the support connection point is formed in the support section of the longitudinal support which is open towards the side of the wheel carrier, wherein the support section consists of a single-layer first metal sheet and a single-layer second metal sheet, wherein the single-layer The second metal sheet is connected to the single-layer first metal sheet by means of a weld seam, wherein the single-layer first metal sheet has at least one of the supporting connection points, and wherein the single-layer second metal sheet has one of the supporting connection points at least one of the . Background technique [0002] Such subframes, also known as axle supports, ar...

AI Technical Summary

Problems solved by technology

High vehicle weight leads to high effective and dynamic axle loads, which in turn lead to increased chassis wear

[0005] Therefore, in practice, the use of conventional subframes for vehicles with internal combustion engines leads to failure of parts during the operation of the motor

If the subframe is designed incorrectly or improperly, part failures can occur especially at weld joints, since weld seams generally have significantly lower strength compared to the steel sheets used

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