| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent generation of oscillations and noises under the minimum discharging capacity operation by dividing a cam plate into the side of a top dead center and the side of a bottom dead center by means of a virtual plane including an axis of a driving shaft, and forming the center of the gravity on the divided portion on the side of the top dead center. SOLUTION: A first virtual plane H1 includes an axis L of a driving shaft, while virtually dividing a tilting plate 23 into two of the side of a top dead center D1 and a side of a bottom dead center D2. A second virtual plane H2 includes the axis L of the driving shaft 16, the top dead center position D1 and the bottom dead center position D2. The second virtual plane H2 is thus formed perpendicularly to the first virtual plane H1. A center of gravity G of the cam plate 23 is formed on the divided portion of the first virtual plane H1 on the side of the top dead center D1. Namely, centrifugal force applied to the cam plate 23 generates unbalancencess. Even under the minimum discharging capacity, an inner surface of a through-hole 23a of the cam plate 23 is pressurized against the driving shaft for preventing displacement and fall thereof in the gravity direction of the driving shaft. It is thus possible to prevent to generate oscillations and noises.</p> |
