| 摘要 |
The present invention relates to a cooling structure of a machine tool, comprising: a front and a rear bearing supporting a spindle; a spindle motor rotating the spindle; and a cooling unit cooling the front bearing, the rear bearing, and the spindle motor. The cooling unit comprises: a front cooling flow path formed in an outer peripheral surface of a housing supporting the front bearing, wherein a fluid supplied from the outside flows; a motor cooling flow path formed in an outer peripheral surface of a motor sleeve arranged on an outer peripheral surface of the spindle motor, wherein a cooling fluid discharged from the front cooling flow path flows; a rear cooling flow path formed on one side of a second housing supporting the rear bearing, wherein a cooling flow path discharged from a motor cooling flow path flows; and a collection cooling flow path formed in a rear end of the motor sleeve, wherein a cooling fluid discharged from the rear cooling flow path flows. |
