| 摘要 |
<p>An impact wrench capable of relieving vibration in the axial direction without weakening a rotary impact force by a hammer. The hammer comprises a main hammer (6) fitted onto the outer periphery of a spindle (5) and a cylindrical auxiliary hammer (7) so disposed as to cover the main hammer (6) and rotated integrally with the main hammer (6). The auxiliary hammer (7) is so held by a core holding means that the auxiliary hammer can be prevented from occurrence of the core deviation thereof and the rotational axis thereof is aligned with the axis of the spindle (5). When this constitution of the hammer is adopted, the vibration in the axial direction can be relieved while maintaining the rotary impact force since the mass of the main hammer (6) is reduced than that of the auxiliary hammer (7).</p> |
