Pneumatic tool motor with built-in beating mechanism

The invention discloses a pneumatic tool motor with a built-in beating mechanism. The pneumatic tool motor comprises an air cylinder body, a rotor group and an output shaft rod, wherein the rotor group comprises a drum and a telescopic blade, and the output shaft rod can be driven by the drum; an inner containing chamber is formed in the inner part of the drum of the rotor group; the output shaft rod is provided with a beating action zone which is positioned in the inner containing chamber; the inner containing chamber is internally provided with the built-in beating mechanism, and the built-in beating mechanism comprises a beating convex block which is arranged in the beating action zone in a bulged way, a movable beating hammer which is arranged at the periphery of the beating convex block in a sleeving way and a supporting post which is axially located on the drum. According to the pneumatic tool motor with the built-in beating mechanism, disclosed by the invention, the axial length and the volume of the pneumatic tool motor can be substantially reduced, and the advantage and advancement that the use is more labor-saving and more convenient can be achieved; the built-in beating mechanism of the pneumatic tool motor has the advantages that the rotor group can be directly driven, a twisting force can be increased immediately, and the disassembling and the locking of components are quick and convenient, and thus the pneumatic tool motor has the advantages that the multi-aspect cost can be substantially reduced, and the better industrial economic benefit can be obtained.