Vibration reduction mechanism of gear machining machine tool

The present invention relates to a damping mechanism of a gear machine tool, which reciprocates a main shaft by means of a crank mechanism, the damping mechanism comprising: a first balance shaft and a second balance shaft arranged parallel to a crankshaft of the crank mechanism, the first and second balance shafts rotating synchronously with the crankshaft at the same speed as the crankshaft, the first balance shaft rotates in the direction opposite to the rotation direction of the crankshaft, and the second balance shaft rotates in the direction the same as the rotation direction of the crankshaft; the main balance block is detachably connected to the crankshaft so as to reduce vibration in the axial direction of the main shaft; and a sub-balance block detachably connected to the first and second balance shafts so as to reduce vibration in a direction perpendicular to an axial direction of the main shaft, the main balance block and the sub-balance block being selected based on a stroke width of the main sha