Tempering device for gear blank

The utility model discloses a tempering device for gear blanks, which belongs to the field of tempering and comprises a tempering furnace, a furnace cover is slidably clamped at the upper end of the tempering furnace, a plurality of telescopic rods are fixedly arranged at the lower end of the furnace cover, a motor is fixedly arranged at the upper end of the tempering furnace, a rotating shaft is fixedly arranged on a motor shaft of the motor, and a plurality of connecting ribs are fixedly arranged on the rotating shaft. The furnace cover is fixedly arranged through the telescopic rod, so that the furnace cover can be conveniently rotated, lifted and moved, the rotating shaft can be conveniently driven by the furnace cover to automatically lift, a gear blank inserted into the upper insertion rod and the lower insertion rod in a sliding manner can be conveniently and automatically lifted, and the effect of conveniently assembling and disassembling the gear blank is achieved; and an upper inserting rod and a lo