| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance lubricating performance of a ball screw. SOLUTION: A plurality of balls 3 are arranged in a freely rollable or circulalable manner in a spiral, circulating passage that is formed between a spiral, screw groove surface 1a, which is formed in the outer periphery of a screw shaft 1 and a spiral, screw groove surface 2a, which is formed in the inner periphery of a ball nut 2. A seal attaching part 2b is installed in both end parts of the ball nut 2, while a sealing member 4 consisting of a solid, lubricating composite is attached to the seal attaching part in order to seal the inside of the ball nut 2 hermetically. Lubricating grease G is enclosed inside the ball nut 2.</p> |
