A screw fastening instrument for switch board

The utility model discloses a screw fastening instrument for switch board, including worm, worm wheel and adapter sleeve, worm and worm wheel all installs just transmission connection between the snail worm and wheel on the adapter sleeve, the utility model discloses utilizing worm right -hand member face to be equipped with and criticizing the shrinkage pool that head or electric screwdriver match with gas, worm wheel one side is equipped with the clamping piece that is used for clamping nut, and the transmission is connected between the worm and worm wheel, lose one's temper that criticize or the electricity is criticized when driving the worm and rotating, and the worm drives worm wheel rotation through the gearing, and then it is rotatory to drive the nut through the clamping piece, realizes carrying out the purpose of fastening to the screw, and improve the packaging efficiency of switch board greatly, and reduced the use of manpower simultaneously, convenient and practical, it is high -efficient conveni