| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooling structure of a machine tool main shaft capable of cooling the main shaft and a bearing by a simple structure. <P>SOLUTION: A cooling liquid supply part 4 for supplying a cooling liquid to the main shaft 1 and a cooling liquid recovery part 5 for recovering the cooling liquid from the main shaft 1 are formed in a housing 2. A cooling liquid flow path for making the cooling liquid flow from the cooling liquid supply part 4 to the cooling liquid recovery part 5 is formed in the main shaft 1. The cooling liquid flow path of the main shaft 1 includes a liquid receiving part 7 for receiving the cooling liquid supplied from the cooling liquid supply part 4 and a plurality of hole-shaped flow paths 8 that are formed in the axial direction of the main shaft 1 from the liquid receiving part 7. The liquid receiving part 7 is formed into an annular groove shape that is recessed at the outer circumference of the main shaft 1 and the hole-shaped flow paths 8 are formed in a generally linear shape toward the cooling liquid recovery part 5 and slantingly formed toward the outside in a main shaft radial direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
