| 摘要 |
In order to improve vibration reduction in an impact tool, the impact tool (101; fig 1) includes a tool body (103), a cylinder (141) housed within the tool body (103), a dynamic vibration reducer (171) having a weight (173) that moves linearly under a biasing force of an elastic element (175R), wherein the dynamic vibration reducer (171) reduces vibration of the tool body (103) during hammering operation by the movement of the weight (173) in the axial direction of the tool bit (119; fig 1), and a mechanical vibration mechanism (116) that actively drives the weight (173) by applying external force other than vibration of the tool body (103) to the weight (173) via the elastic element (175R). The weight (173) and the elastic element (175R) are disposed on the axis of the tool bit (119; fig 1) and between an inner wall surface of the tool body (103) and an outer wall surface of the cylinder (141) in such a manner as to cover at least part of the outer wall surface of the cylinder (141) in the circumferential direction. |
