| 摘要 |
The present invention relates to a main spindle with an improved structure and, more specifically, to the main spindle with an improved structure, which comprises: an absorber cylinder being installed at the one side of a ram body and operating before a drawbar moves forward to prevent a shock from the drawbar from being transferred to the main spindle and a main spindle bearing; an absorber cylinder piston moving straight by an operation of the absorber cylinder; and a shock relief device comprising a stopper installed at the outer circumference of the main spindle for the absorber cylinder piston to be attached to the main spindle. |
