Spring arm for chassis of motor vehicle, has base portion having cross section with upper side and lower side extending in arc-shape, in which upper side and lower side are interconnected through other two sides that are parallel

摘要

#CMT# #/CMT# The spring arm (1) has a base portion (2) which is formed by a hollow profile. The base portion in longitudinal portion has a cross section having an upper side and lower side opposite the upper side extending in an arc-shape. The upper side and the lower side are interconnected through the other two sides which are parallel. The other two sides are extended parallel in portion of the walls of base portion so that through-holes are formed for receiving the functional element. #CMT# : #/CMT# An independent claim is included for method for manufacturing spring arm. #CMT#USE : #/CMT# Spring arm for chassis of motor vehicle. #CMT#ADVANTAGE : #/CMT# The structural and functional properties of spring arm can be improved by specific shaped cross sections of individual longitudinal portions in longitudinal direction of the spring arm. The cross-section for the initial profile is obtained without transformation for spring arm with good structural and functional characteristics. The high mechanical stability in the direction of vertical axis of the motor vehicle is achieved by curved formation of lower side in the underside of the spring arm. The structural properties and favorable deformation behavior can be achieved with press in vertical direction by the upper and lower sides. The longitudinal portion of the spring arm forms the original area of the base portion in longitudinal section by a simple press. The other elements of chassis of motor vehicle are arranged on the spring arm with space requirements without significant production cost or significant negative impact on the associated stability of the spring arm. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawings show the isometric view and side view of the spring arm. 1 : Spring arm 2 : Base portion 7a,7b : Bearing bushes 8 : Bearing bolt 9 : Hole for shock absorption.