| 摘要 |
PURPOSE:To cancel the component of the vertical direction of the secondary term of the inertia force by a method wherein the addition of the difference of phase angle phi of the first crank pin and the second crank pin, and the angle alpha between two connecting rods, namely alpha+phi is made pi/2. CONSTITUTION:When the included angle of cylinders 8, 9 is made alpha to prevent the vibration in the vertical direction due to the inertia force according to the reciprocating motion of pistons 6, 7, crank pins 4, 5 are arranged in a crank shaft 1 so as the difference of phase angle phi of crank pins 4, 5 for the center shaft of the crank shaft 1 satisfies the formula. |
