| 摘要 |
PURPOSE: An automatic pre-load control device for a spindle bearing using fine hydraulic pressure is provided to prevent damage to a spindle bearing by absorbing and relieving vibration and impact. CONSTITUTION: An automatic pre-load control device for a spindle bearing using fine hydraulic pressure comprises a pre-load spring(106), a sleeve(107), a piston(105), and a flange(108). The pre-load spring applies pre-load to a bearing housing(104). The sleeve is slidably coupled to the outer surface of the bearing housing. The piston is installed on the outer surface of the sleeve. The flange is coupled to a spindle(102). Fine hydraulic pressure is applied to the piston, and the piston applies the pressure to the flange through a spacer(109) and a buffer spring(110).
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