A MOBILE CHASSIS

摘要

A mobile chassis (10) characterised by a central frame (12) which is supported by four wheels (60, 68, 74, 76). Wheels (74 and 76) are respectively supported on one end of side beams (14 and 16) in turn pivotably mounted to central frame (12) at (70 and 72) to pivot about Y-Y axis. Wheels (66 and 68) are mounted on ends of a transverse beam (18) which is pivotably mounted at (52) to the central frame (12) to pivot about X-X axis. The other end of the side beams (14 and 16) are pivotably connected to the ends of the transverse beam (18) so that vertical movement of each wheel is compensated by pivotal movement of beams (14, 16 and 18). Rollers (56) and segments (42) constrain movement of the beam (18).