Structure: Typically composed of multiple metal rods connecting wheels to the vehicle body via ball joints or bushings, commonly found in multi-link suspensions (such as rear suspensions).
Function
Constrains wheel movement in vertical, lateral, and longitudinal directions while maintaining tire contact angles with the road surface (e.g., caster angle).
Assists shock absorbers and springs in absorbing road impacts, reducing body bounce.
Material and Design: Primarily high-strength steel or aluminum alloy; lightweight materials are used in some high-performance vehicles to reduce unsprung mass.
Basic Characteristics of Suspension Arms
Type: Commonly found in double wishbone suspensions (front suspension), consisting of upper and lower A-shaped arms.
Function
Precisely controls wheel movement trajectories (e.g., camber changes during steering) through coordinated action of upper and lower arms.
Provides enhanced lateral support, reduces body roll during turns, and improves handling stability.