Self-propelled multifunctional hoisting machine

The utility model discloses a self-propelled multifunctional hoisting machine which comprises a bottom frame, a reinforcing rod is welded between the inner walls of the two sides of the bottom frame, a supporting rod is welded to the outer wall of the top of the reinforcing rod, a cantilever is hinged to the top end of the supporting rod through a shaft, an extension rod is movably inserted into the cantilever, and an electric telescopic rod is hinged between the cantilever and the supporting rod through a shaft. One end of the screw rod is connected with the partition plate through a bearing; one end of the screw rod penetrates through the partition plate and is welded with a worm wheel; a worm is connected between the inner walls of the two sides of the cantilever through a bearing, the worm is meshed with the worm wheel, and one end of the worm extends out of the cantilever and is welded with a hand wheel. Through the arrangement of the worm, the worm gear and the lead screw, the worm is used for driving t