Patent ID: 9724814
Date: 2017-08-08
CPC Classifications: B25D

Claim:
1. An impact tool that performs a prescribed processing operation on a workpiece by carrying out an impact operation on a tool bit in a longitudinal axis direction, comprising: a tool main body having a front and a rear and a left side and a right side and a top and a bottom; a tool bit holder located at the front of the tool main body and configured to hold the tool bit; an outer-rotor motor housed in the tool main body, the motor comprising a stator and a rotor disposed on an outer side of the stator; a motor output shaft configured to be rotated by the rotor, the motor output shaft extending in a front-rear direction and being disposed parallel to and below an extension line of a longitudinal axis of the tool bit, the motor output shaft being spaced from the extension line by a prescribed distance; a drive shaft disposed coaxially with the motor output shaft and extending in the front-rear direction, the drive shaft being configured to be rotatably driven by the motor output shaft; an oscillating member supported by the drive shaft and configured to carry out an oscillating movement in the axial direction of the drive shaft based on the rotational motion of the drive shaft; a tool drive mechanism coupled to the oscillating member and configured to linearly move the tool bit in the longitudinal axis direction by the oscillating movement of the oscillating member, thereby linearly driving the tool bit; and a vibration-preventing mechanism for reducing vibrations of the tool main body, the vibration-preventing mechanism at least partially overlapping the motor in the front-rear direction when viewed from the right side of the tool main body and at least partially overlapping the motor in a left-right direction when viewed from the top of the tool main body and at least partially overlapping the motor in a top-bottom direction when viewed from the right side of the tool main body.