Stone breaker for constructional engineering

The stone breaking machine comprises a shell, a feeding port, a rotating shaft and a stone breaking knife, a first bearing is embedded in one side of the outer wall of the lower end of the shell, therotating shaft is rotationally installed in the first bearing, a discharging port is formed in the outer wall of one side of the shell, and a supporting plate is installed on one side of the inner wall of the shell; crushing paddles distributed in a circular array mode are installed on the inner wall of the side, away from the supporting plate, of the shell, stone crushing cutters distributed in acircular array mode are installed on the outer wall of the side, penetrating through the supporting plate, of the rotating shaft, and the stone crushing cutters and the crushing paddles are distributed in a crossed mode. Second bearings are embedded in the two sides of the inner wall of the feeding port correspondingly. Through the arrangement of the connecting plate, the connecting rod and the stone crushing knife, the e