Patent ID: 8196675

Claim:
An impact hammer with pre-pressing damping and buffering effect comprising: a main body comprising: a handle; an outer barrel; an air inlet; an internal slide; an actuating cylinder; and an air flow switching module, of which, the air inlet is placed at a rear end of the outer barrel, the internal slide is slidably accommodated between front and rear end walls of a holding space within the outer barrel, the actuating cylinder is arranged at front end of the internal slide, and the front end of the actuating cylinder is protruded from the front end of the outer barrel to form a tool head coupling portion, the air flow switching module is assembled at the rear end of the actuating cylinder to control the movement of the piston within the actuating cylinder, moreover, the rear end of the actuating cylinder is provided with an air inlet duct that can be slidably extended and inserted into the air inlet; a front damper, assembled between the front end of the internal slide of the main body and the front end wall of the holding space; and a two-section pre-pressing rear damper, assembled between the rear end of the internal slide of the main body and the rear end wall of the holding space, said two-section pre-pressing rear damper comprises: superposed upper and lower elastic buffers, of which at least the lower elastic buffer is pressed by a pre-pressing member to the preset degree.