| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration control device in a portable working machine, with which vibration absorption in the rotation direction of a driving motor is raised and vibration absorptions in the vertical direction and in the right and left directions between a connection pipe and a clutch housing are improved. SOLUTION: The output shaft 4 of a driving gear 1 for outputting through a centrifugal clutch 2 and a clutch drum 3 is connected to a driving shaft 11 inserted into the hole part 6b of the clutch housing 6 and drives a rotary operation device arranged at the other end of a connection pipe 10. Vibration-proof rubber 8 is laid between a first and a second semicircular-arc holders 9a and 9b into which the connection pipe 10 is inserted and the hole part 6b. Longitudinal grooves 15 are made in the length direction of the vibration-proof rubber 8 on the outer peripheral surface of the vibration-proof rubber 8 and a through hole 8c being the inner peripheral surface of the vibration-proof rubber 8 is formed so as to have a circular cross-sectional shape. COPYRIGHT: (C)2005,JPO&NCIPI
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