| 摘要 |
PROBLEM TO BE SOLVED: To provide a planetary ball mill in which a sun gear coincides with a shaft center of a rotary table in a compact fixation structure, and the outer diameter of the sun gear is not constrained to a large size. SOLUTION: A hollow hole 8 opened at the upper end is formed on the upper part of the rotary shaft 2a of the rotary table 2, and the fixed shaft 7a fixing the sun gear 7 is inserted into the hollow hole 8 of the rotary shaft 2a to hold the sun gear relatively rotatably with the rotary shaft 2a, thereby allowing the sun gear 7 to incide with the shaft center of the rotary table 2 in a compact fixation structure, and allowing the outer diameter of the sun gear 7 not to be constrained to the large size. COPYRIGHT: (C)2008,JPO&INPIT
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