The invention discloses a power
takeoff which comprises a shell, an output shaft
assembly, an input gear and an
oil supply system, wherein the shell is provided with an inner cavity and an opening, the output shaft
assembly is arranged in the inner cavity, and the input gear is mounted in the opening. The output shaft
assembly is matched with the input gear, so that an accessory device absorbs power of a power source, the output shaft assembly comprises an output shaft, output gears and clutches, the output gears are rotatably mounted on the output shaft, each
clutch comprises dual discs, a
clutch piston, friction discs, a
clutch piston seat and a compression reset spring, the dual discs and the output gears are fixed, the clutch pistons, the friction discs and the output shaft are radially fixed and jointly act, the clutch
piston seats and the output shaft are fixed, a
valve seat connected with the
oil supply system is arranged at one end of the shell, a bearing cover is arranged at the other end of the shell, an input end of the output shaft is connected with the shell and communicated with the
oil supply system through an oil channel arranged inside the output shaft, and an oil outlet end of the oil channel is communicated with clutch cavities among the clutch pistons and the clutch piston seats. When the clutch cavities feed and drain oil, the clutches are correspondingly combined and separated, and the friction discs and the dual discs correspondingly transmit in a compressed manner and freely rotate.