| 摘要 |
PROBLEM TO BE SOLVED: To provide a preventing mechanism of the deviation of worn parts in a ball-screw driving device for preventing the deviation of the worn parts of a belt, pulley or the like which form power transmission elements of a power transmission part, progressing average consumption and essentially prolonging change cycle. SOLUTION: In the ball screw driving device KB taking charge of the pressurizing operation of a metal plate working machine such as a press, injection molding machine or the like, the device has a power transmission part consisting of a 1st driving part M1, 1st pulley P1 provided on the concentric shaft of this 1st driving part M1, 2nd pulley P2 provided on the concentric shaft B1a of a male screw part and belt Be1 for transmitting driving force by connecting and tightening the 1st pulley P1 and 2nd pulley P2 and a rotating mechanism Hr is provided to a nut part B2 to eliminate the deviation of load distribution by which the wear in specified parts by abuttinged between the 1st pulley P1, the 2nd pulley P2 and the belt Be1 which are the power transmission elements is promoted and a correctively rotating mechanism Hr is provided to a nut part B2 to prevent the concentration of wear in the specified part of each power transmission element.
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