| 摘要 |
The present invention relates to a gas spring (1; 101) included in a clamping device on a machine spindle, whereby said clamping device comprises a drawbar, clamping members arranged at one end of the drawbar in order to clamp a part of a tool coupling at said end, whereby the gas spring (1) exerts an axially directed force on the drawbar in the direction away from the clamping members, and that the gas spring (1) comprises a housing (3), a piston (5), which has two end portions (7, 15), axially displaceable in the housing (3), as well as a gas medium (6) contained in the housing (3). The invention also relates separately to a machine spindle. <??>Characteristic of the gas spring (1) according to the present invention is that the internal limiting surface of the housing (3) comprises a portion (8a) that widens in the direction of the end portion (7) of the piston (5) having a larger cross-section. <IMAGE> |
