| 摘要 |
PURPOSE: To minimize vibration over the max. range as a driving mechanism wherein at least a part of a counterbalanced weight is activated to move on a track pass by gear rotation. CONSTITUTION: A power tool comprises casing regions 12 and 14. The casing region 12 is made from two parts contg. a part 12a. The casing region 14 comprises a handle part 15 carrying a handling trigger 16. The casing region 14 is generally hollow and receives an electric motor, e.g. a series motor contg. a stator 18 and an armature 20 or an AC-DC motor. The armature contains an output shaft 22 and one end of the output shaft is appropriately placed on a bearing assembly 24 supported by the casing 14. The armature shaft 22 contains a commutator 26 hooked by a set of brushes 28. Vibration is decreased thereby over the max. range. |
