| 摘要 |
PROBLEM TO BE SOLVED: To reduce vibration by effectively suppressing inclination between an eccentric shaft and a base due to orbital motion of the base. SOLUTION: In an orbital sander 1, a body 2 including a motor 3 is provided with a spindle 7 rotated by driving the motor 3 and the eccentric shaft 7A located at an eccentric position from the center of rotation of the spindle 7 and performing a circular orbital motion along with rotation of the spindle 7, the eccentric shaft 7A projecting downward from the body 2 is provided with a base 5 coupled via two upper and lower ball bearings 14 and 15, and a balancer 23 projecting to the opposite side of the eccentric side. A center of gravity P of the base 5 is set between the two upper and lower ball bearings 14 and 15. COPYRIGHT: (C)2012,JPO&INPIT |
