| 摘要 |
A pneumatic cylinder device ( 10 ) for trailer or semitrailer vehicles which, according to the angle of rotation between the truck ( 46 ) and the semi-trailer ( 35 ) or between the tractor ( 47 ) and the trailer ( 48 ), assumes an angular position which transmits the command for power assisted steering of the wheels on the steering or self-steering axle of the respective semi-trailer ( 35 ) or trailer ( 48 ) the pneumatic cylinder ( 11 ) is a single-action device and a base ( 24 ), the end of the latter attached to an additional pin ( 28 ) fixed on a semi-trailer ( 35 ) or, respectively, on a trailer ( 48 ), the cylinder ( 11 ) housing a piston ( 21 ) which slides along the cylinder and a rod ( 14; 26 ) connected to the piston ( 21 ), the rod ( 14; 26 ) acting as a longitudinally extending and transversally rigid tie rod for the presence of pressurised air supplied to the inside of the cylinder through a supply hole ( 23 ).
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