| 摘要 |
The present invention relates to a machine tool, and more specifically, to an air curtain device of a machine tool preventing the penetration of foreign materials such as cutting oil to a main shaft bearing by injecting air. The air curtain device of the main shaft of the machine tool according to the present invention to achieve the technical purpose is characterized by including: the main shaft (100) processing an object by clamping and rotating a tool of the machine tool; a main shaft housing (200) covering the main shaft (100) in an axial direction and supporting the rotation; the main shaft bearing (300) joined to the outer circumference of the main shaft (100), installed inside the main shaft housing (200), and supporting the main shaft (100) to be able to rotate; a lock nut unit (400) supporting the main shaft bearing (300) on one end of the main shaft (100) where the tool is mounted in the axial direction and joined to the main shaft housing (200); and a disc-shaped air curtain cover (500) having a circular penetrating unit (510) forming an identical axis with the main shaft (100) and one surface closely adhering to the main shaft housing (200) and injecting air while the inner side of the penetrating unit (510) is closely joined to the circumference of the lock nut unit (400). |
