| 摘要 |
PURPOSE:To eliminate the unballance inertia and the rolling by providing ballancer weights in the opposite direction from a crank pin and at the proper angular position from the center line connecting between the centers of piston and crank shaft. CONSTITUTION:A ballancer 5 is provided on the extended shaft of the large end section 3a of a conrod 3 while another ballance weight 8 is provided at the position making predetermined angle psi2 against the opposite center line from a crank pin 6 of the crank shaft 7 coupled rotatably with the large end section 3a through a crank pin 6, and second ballancer 4 is provided at the position making predetermined angle psi1 against the center line passing from the center of the piston 2 through the center O of the crank shaft to rotate in the direction A together with the crank shaft 7. The weight or the position of said ballancer or weight is set properly to ballance the crank. |
