| 摘要 |
Pneumatical piston-cylinder unit, named "air-cylinder", having a cylinder (1) in which an air piston (4) with a tubular piston rod (5) is reciprocatable, actuated by compressed air from two main air channels (18, 19), and in which the air cylinder (1) comprises an integrated hydraulic control system (6) having an actuation means (8) which is fixedly mounted in the air cylinder (1) for creating a flow of hydraulic fluid through the hydraulic control means (6) when compressed air is present in the main air channels (18, 19) and for stopping the flow of hydraulic fluid and thereby the possibility for the air piston to move in case there is no compressed air in said main channels (18, 19). A piston (34) and a cylinder (28) of the hydraulic control means (6) are displaceable an adjustably long distance in relation to each other for thereby making it possible to open and close, respectively, a larger or smaller hydraulic fluid passageway thereby controlling the moving speed of the air piston (4) while maintaining the air pressure. The air cylinder comprises means (15, 16, 40) for setting the piston stroke of the air piston (4) and the exact location of the axial piston movement. |
