| 摘要 |
PURPOSE:To protect a V-belt from tightening and loosening by supporting a crank shaft by means of vibration-proof rubbers in front and rear direction perpendicular with the shaft at the upper outside of engine and the lower series direction thereby absorbing the back and fro, left and right strong vibration. CONSTITUTION:It is arranged such that the line connecting between the vibration-proof rubbers 3, 4 will pass in the vicinity of an inertia spindle of engine. When arranging the vibration-proof rubbers 3, 4 on the inertia spindles in the back and fro directions, the vibration and pitching in the back and fro direction can be cancelled. Since V-belt 7 is stretched in back and fro direction over an output pulley 6 and input pulley 31, high vibration is eliminated to prevent excessive tightening and loosening. Another vibration-proof rubber 5 is arranged in up-down direction in series with said rubber 4 at the side where V-belt is not stretched. Consequently the resonance point will be lower than the idling rotation of engine to eliminate resonance point in the required rotation range thus to eliminate hardest vibration area. |
