Patent ID: 8646789
Filing Date: 2014-02-11
Classification: B60G

Abstract:
1. A torsion beam type suspension device comprising left and right trailing arm parts ( 15 ) that extend in a fore-and-aft direction of a vehicle body, have front ends thereof vertically swingably pivoted on the vehicle body, and axially and rotatably support a wheel (W) at a rear end thereof, and a torsion beam part ( 14 ) that extends in a lateral direction of the vehicle body and has opposite ends thereof connected to the left and right trailing arm parts ( 15 ), the trailing arm parts ( 15 ) and the torsion beam part ( 14 ) being formed as a unit by press-forming a tailored blank material ( 13 ) in which end parts of plate materials having different thicknesses are butt-welded via a weld part ( 17 ), characterized in that the torsion beam part ( the device comprises an upper member (