| 摘要 |
1525779 IC and steam engines; reciprocating pumps and motors E HARR 3 Aug 1976 [9 Aug 1975] 32301/76 Headings F1A F1B and F1M The reciprocating piston of an engine or pump has its centre of gravity offset from the longitudinal axis of reciprocation and is constrained to rotate about the longitudinal axis during the reciprocation. The centre of gravity consequently has a rotating motion instead of a reciprocating motion. An I.C. engine, Figs. 1 and 3, comprises a piston 51 reciprocating within a cylinder provided with a combustion chamber 58 at each end. The cylindrical wall of the piston is thickened in one region so that the centre of gravity of the piston is displaced from the longitudinal axis. Arms 60, 61 extending laterally from the piston are articulated at 65 to gear-wheels 62 which are rotatably mounted on spindles 63 and which mesh with a contrate output wheel 66. The connection of the arms 60, 61 to the gear-wheels 62 constrains the piston to carry out an oscillatory rotation about its longitudinal axis during reciprocation, whereby a corresponding oscillatory rotation is imported to the wheels 62, 66. The wheels may be bevel gears. In another embodiment, Fig. 4, the piston 131 is pivotally connected at its offset centre of gravity 135 to a drive wheel 134 which penetrates the cylinder 132 at, say, 45 degrees to the longitudinal axis and is guided in slots 141, whereby the piston undergoes a combined reciprocatory and rotary motion and the wheel 134 rotates. The wheel 134 may be provided with counterweights to counteract the centrifugal force of the piston. Fig. 6 shows an engine in which the piston 181, which again has an offset centre of gravity, is connected to an output wheel 196 (which is counterweighted) via a ball joint 193 and a link 192 which can swing about a pivot pin 194. Instead of being an I.C. engine, the machine may be an engine operated by steam, compressed air or oil under pressure or may be a pump. |
