Patent ID: 9156152
Filing Date: 2015-10-13
Classification: B25D

Abstract:
1. An impact tool which is configured to perform a predetermined operation on a workpiece by axial striking movement of a tool bit coupled to a front end region of a tool body, comprising: a motor that is housed in the tool body, a drive shaft that is disposed in parallel to an axial direction of the tool bit and rotationally driven by the motor, a ring-like member that is rotatably mounted onto the drive shaft and caused to swing in the axial direction of the tool bit by rotation of the drive shaft, a tool driving mechanism that is connected to one end region of the ring-like member in a direction transverse to the axial direction of the tool bit and is caused to rectilinearly move in the axial direction of the tool bit by swinging movement of the ring-like member and thereby rectilinearly drives the tool bit, and a counter weight that is mounted movably in the axial direction of the tool bit and reduces vibration which is caused in the tool body in the axial direction of the tool bit during operation, wherein: the counter weight has a connecting part, and the counter weight is connected to the ring-like member via the connecting part, and the connecting part is formed in the counter weight and comprises a protrusion that comes in contact with an outer edge of the ring-like member in both axial directions of the tool bit.