| 摘要 |
<p>A reciprocal steam drive section (2) converts energy of steam into linear reciprocal motion. A cam follower (23) provided at the distal end of a piston rod (8) performing linear reciprocal motion is made to engage with a cam groove (21) formed in the side of a rotation output section (1) and linear reciprocal motion is converted into rotary motion of the rotation output section (1). Since linear reciprocal motion is converted into rotary motion through engagement of the cam groove (21) and the cam follower (23), compaction can be attained. Since the reciprocal steam drive sections (2) are arranged at positions dividing the cross-section of the rotation output section (1) equally into three or more, one or more cam followers (23) engage at points of the cam groove (21) other than the top and bottom dead centers, and since a rotary torque is always imparted to the rotation output section in a fixed direction by the cam follower (23), the cam follower (23) passes through the top or bottom dead center smoothly and reliable rotary motion is obtained.</p> |
