Suspension system for a vehicle

A suspension system for a vehicle connecting a vehicle body and axle means, comprising:

• left and right cantilever spring arms both made of fiber reinforced plastic, each spring arm having a fixed end fixed to the vehicle body and a free-end portion extending toward the axle means and being vertically bendable, said free-end portion being connectable to said axle means;
• a beam assembly extending in the transverse direction of the vehicle body and having connecting portions connected to the respective free-end portions of said left and right spring arms;
• and
• connecting means for connecting said free-end portions of said spring arms to said beam assembly;
• said beam assembly including:
• a pair of metallic end beam members provided at said connecting portions of said beam assembly and being coupled to the respective spring arms;
• an intermediate beam member of fiber reinforced plastic having two opposite end portions, each opposite end portion being fixed individually to respective end beam members;
• a pair of connecting boxes fixed individually to said end beam members, each connecting box having an opening portion into which each corresponding end portion of said intermediate beam member is inserted and an inner surface continuous with said opening portion;
• a pair of wedge-shaped spacers interposed individually between said end portions of said intermediate beam member and the respective inner surfaces of said connecting boxes;
• and
• clamping means for maintaining the spacers inserted between said end portions of said intermediate beam member and said respective inner surfaces of said connecting boxes.