The pneumatic pick is composed of air distribution mechanism, impact mechanism and pneumatic pick. The impact mechanism is a thick-walled cylinder with an impact hammer that can reciprocate along the inner wall of the cylinder. The tail of the pick drill is inserted into the front end of the cylinder, and the back end of the cylinder is equipped with a valve box.
There are many longitudinal air holes around the cylinder wall, and the spring of the compression plunger valve is connected with the air path. One end of these air holes is connected with the valve for pushing the handle sleeve, and the other end is connected with the cylinder. The length of each air hole is configured according to the movement requirements of the impact hammer, so as to take turns to intake or exhaust air. The plunger valve is normally closed under the action of the coil spring, and the gas path is cut off. So that the impact hammer regularly reciprocates in the cylinder. When the impact hammer moves forward, the impact hammer hits the solder tail; When the impact hammer moves backward, the gas in the cylinder is sealed in the valve box to form a flexible cushion, and the gas in the cylinder is sealed in the valve box and then impacts forward after redistribution. The hammer hits the drill tail; When the impact hammer moves backward, the starting device of the pneumatic pick is located in the handle sleeve. A plunger valve for controlling the gas path is arranged between the gas inlet pipe and the distribution valve, and the plunger valve is in a normally closed state for cutting off the gas path under the action of a coil spring. When the pneumatic pick works, the drill bit of the pneumatic pick presses on the construction surface, and the other end is connected with the cylinder, which pushes the handle sleeve, compresses the spring of the plunger valve and connects the gas path. There are many longitudinal air holes around the cylinder wall, and the valve automatically distributes air immediately. The valve box is installed at the rear end of the cylinder. Make the impact hammer move back and forth continuously, impact the drill tail and break the construction body. Pneumatic pick is a hand-held machine tool, which consists of gas distribution mechanism, impact mechanism and pneumatic pick bit. Therefore, it is required to be compact and portable.