The construction principle of the electric hammer drill
(1) Structure and principle: The electric hammer drill is composed of a drill bit, a chuck, a roller, an adjustment sleeve, a transmission system (including an electric gas turning device, an impact piston, a hammer body, a mechanical overload protection device and various speed change gears), a motor, The shell, control switch and working state control valve (stop) are composed. The motor provides rotating energy, and part of the energy drives the piston to make a complex movement of the column through the variable speed gear, crank wheel, and connecting rod. It cooperates with the impact piston to produce a high-pressure air cushion that changes periodically, and drives the impact piston to make the complex impact hammer body. The movement drives the drill bit to impact; the other part of the rotating energy drives the chuck and the drill bit to rotate through the overload protection device, the fence change ring and so on. The working form of the tool is controlled by the gear lever...