| 摘要 |
PURPOSE:To supply lubricating oil through centrifugal force, by forming a flow path of the lubricating oil in a gap between a main pindle and a submain spindle from the shaft core direction of the main sindle, in lubricating construction formed between the main and the submain spindles and having the submain spindle movable in the shaft core direction of the main spindle in the inside of the rotary main spindle. CONSTITUTION:Lubricating oil 25, which performs lubrication between a main spindle 2 and a submain spindle 10, is supplied to a gap 26 through a lubricating oil supply pipe. And then a lubricating oil path consisting of a gap 27 and supply oil holes 12d, 19c or the like is formed, here the oil 25 is supplied to a part between the main spindle and the submain spindle 10 from the inside of the spindle 10, consequently the oil 25 is supplied by centrifugal force in accordance with rotary motion of the main spindle 2. Supplied lubricating oil 15 is caused to flow out to the outside from an end face 2b of the main spindle 2. |
