Clamping mechanism of vertical milling machine

The utility model provides a clamping mechanism of a vertical milling machine, which comprises a gear disc, a speed reducing motor is installed on one side of the gear disc, a second gear is installedat the output end of the speed reducing motor, the second gear is meshed with the gear disc, a sliding block is connected with a guide rail in a sliding mode, and a rack is installed at the top end of the sliding block. A supporting plate is fixedly installed at the top end of the rack, a clamping plate is arranged at the top end of the supporting plate, a machine box is installed in the middle of the top end of the gear disc, first gears are installed on the two sides of the machine box, the two first gears are meshed with the rack, and the bottom end of the machine box is fixedly connectedwith the top face of the gear disc. Two driven bevel gears are installed on the inner side of the machine box, the driven bevel gears are fixedly connected with the first gear, a driving bevel gear isinstalled between the two