Four point linkage for the connection of a rigid axle to the frame of a commercial vehicle

The extended arms (6-9) extended from a central region (5) has outer-end bearings (10-13). The two bearings (10,11) are connected with vehicle chassis frame (3), and the two bearings (12,13) are connected with beam axle (2). The mutually parallel outer surfaces (14A,14B,15A,15B,16A,16B,17A,17B) of each arm are joined with arcuated outer surfaces (18A,18B,18C,18D) of central region. The central region has four arc-shaped wall sections (20A-20D) which are spaced apart from each other at specific interval (25) corresponding to distance (26) of arm outer surfaces.