公开(公告)号：US20040033116A1

公开(公告)日：2004-02-19

申请号：US10462600

申请日：2003-06-17

Applicant: SANDVIK AB

Inventor： Ken Anderson

IPC: B23C001/00 ,  B23C005/26

CPC classification number: B23B31/302 ,  B23B2250/12 ,  Y10T409/309408 ,  Y10T409/309464

Abstract: A machine spindle includes a rotatable casing in which a clamping device is mounted. The clamping device includes a drawbar for securing a cutting tool. The drawbar is axially displaced by a gas spring which includes a chamber in which a lubricant-containing gas medium is confined. A piston includes a head slidable within a cylindrical upper portion of the chamber, and a rod extending through a lower portion of the chamber and connected to the drawbar. The lower portion of the chamber is non-cylindrical and widens upwardly to promote the upward travel of lubricant toward the piston and upper seals under the effects of centrifugal force during rotation of the spindle.

Abstract translation: 机器主轴包括可旋转的外壳，其中安装有夹紧装置。 夹紧装置包括用于固定切割工具的拉杆。 牵引杆由气弹簧轴向位移，气弹簧包括一个容纳含润滑剂的气体介质的腔室。 活塞包括可在所述腔室的圆柱形上部中滑动的头部，以及延伸穿过所述腔室的下部并连接到所述牵引杆的杆。 室的下部是非圆柱形的，并且在主轴旋转期间在离心力的影响下向上加宽润滑剂朝向活塞和上密封件的向上运动。