| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved technique effective for reducing vibration of an impact tool in the impact tool that linearly drives a tool bit in the longitudinal axial direction by using a swinging mechanism. SOLUTION: The impact tool is provided with the tool bit 119, a tool body part 103, a motor 111, a rotary shaft 125, the swinging mechanism 130, a piston cylinder 141, a striker 143, and an air chamber 141a. A mass body is composed of the piston cylinder 141 and the swinging mechanism 130. An elastic body 153 is arranged between the swinging mechanism 130 and a tool body part side. The elastic body 153 is elastically deformed by the mass body moving backward to accumulate resilient force therein. Kinetic energy generated in the mass body moved forward by the resilient force accumulated in the elastic body 153, is oppositely operated against compressive reaction force acting on the piston cylinder 141 when the striker 143 is hit forward. COPYRIGHT: (C)2009,JPO&INPIT
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