Scissor-fork type intelligent jack capable of being switched between hand cranking and electric operation

The utility model relates to the technical field of jacks, and discloses a hand-cranking and electric switching scissors fork type intelligent jack which comprises a chassis, a reduction gearbox is fixedly connected to the top of the chassis, a lead screw penetrates through and is rotatably connected to the interior of the reduction gearbox, and a crank penetrates through and is arranged on the outer wall of the right side of the reduction gearbox. A first nut pair is in threaded connection with the outer ring of the left side of the lead screw, a second nut pair is arranged on the left side of the first nut pair and is in threaded connection with the outer ring of the lead screw, and supporting arm bearing shafts are fixedly connected to the outer walls of the left sides and the right sides of the first nut pair and the second nut pair. The bearing head is supported and replaced through the installation head and the insertion rod, the application scene is wide, the crank and electric switching shear fork typ