Patent ID: 8454041

Claim:
A suspension arm unit for vehicle comprising: a pair of profile beams each having a U-shaped cross section with an opening oriented in a horizontal direction, each profile beam including: a base end part which is formed on one end side of the profile beam and vertically swingably supported on a vehicle body side about an axis extending in a front-rear direction of a vehicle body; and a distal end part which is formed on the other end side of the profile beam and to which a knuckle arm unit of a wheel is attached; wherein the pair of the profile beams are arranged in the front-rear direction of the vehicle body so that the openings face each other in the front-rear direction of the vehicle body and a gap between the profile beams becomes larger from the distal end part to the base end part, wherein the distal end parts of the pair of the profile beams are overlapped with each other, and wherein the pair of the profile beams are connected to each other at the distal end part thereof and connected to the knuckle arm unit through a rotary joint.