Driving device for turning-milling worktable spindle

The utility model relates to a driving device for a turning-milling worktable spindle, which is used in numerical control systems, cooling systems and lubricating systems of large-sized vertical turning-milling centers. The driving device for a turning-milling worktable spindle is characterized by adopting two main motors of different specifications to drive a worktable spindle; the center of a base of a machine tool is fixedly provided with a worktable spindle kit; a turning double-speed reduction device is fixed at the left side of the base, and a milling backlash eliminating speed-reduction device is fixed at the right side of the base; the high power main motor of a milling speed reduction device is connected with a double-gear speed reduction machine and connected with a milling reduction box through screws; and the small power motor of the milling backlash eliminating speed-reduction device is connected with a reduction box through a bearing, both reduction boxes have the same inside structures, the synchronous control of both main motors is performed by the numerical control system to realize the functions of milling speed adjustment and C-shaft backlash elimination. The driving device for the turning-milling worktable spindle not only can reduce the requirements for motors but also can improve the dislocation precision of the machine C-shaft, and can realize the C-shaft positioning precision of plus or minus 5', the repeated positioning precision of plus or minus 2.5' and the reverse deviation of 3'.