| 摘要 |
The invention relates to a piston type pneumatic engine, comprising a cylinder block, a piston, a cylinder, a crankshaft, a connecting rod, a camshaft, and a device for controlling the opening or closing of a gas valve, wherein a cylinder cover is arranged on the cylinder block; an inwardly-opened type compressed-gas intake valve and an exhaust valve are arranged on the cylinder cover; an intake cam and an exhaust cam are arranged on the camshaft; the opening or closing of the intake and the exhaust valves is controlled by a rocker arm which is driven by the camshaft, wherein the camshaft is driven by the rotated crankshaft via a timing chain or belt, and then high-pressure gas is controlled to enter the cylinder to promote the reciprocating motion of the piston and to exhaust low-pressure gas when working is completed; the crankshaft is driven and rotated by the piston via the connecting rod to output power. The piston type pneumatic engine is characterized in that : a suction valve is also arranged on the cylinder cover; a suction cam is also arranged on the camshaft; The opening or closing of the suction valve is controlled by the rocker arm so as to control the timing for the cylinder to suck air outside and be closed, and the bore-stroke ratio of the cylinder and the piston is 1:2-15, most preferably 1: 10. |
