SYNCHRONISED STEERING MECHANISM

摘要

A vehicle such as a forklift truck has a pair of wheels (12L, 12R) each steerable by a respective hydraulic cylinder (24L, 24R) such that each wheel is turned to an angle determined by the position of the piston head in the respective cylinder. Each cylinder (24L, 24R) has a full bore side (36L, 36R) and a rod side (38L, 38R), and the full bore side (36L) of the cylinder (24L) is hydraulically connected to the rod side (38R) of the cylinder (24R). The vehicle further includes means (46) for supplying hydraulic fluid under pressure selectively to the rod side (38L) of the cylinder (24L) or to the full bore side (36R) of the cylinder (24R). In other embodiments the full bore sides of the two cylinders may be hydraulically connected together and the hydraulic fluid under pressure supplied selectively to one or other of the rod sides, or the rod sides of the two cylinders may be hydraulically connected together and the hydraulic fluid under pressure supplied selectively to one or other of the full bore sides.