| 摘要 |
A plastic ring (9) for detachably fixing a rounded-shaft tool (1) into a tool bushing (6), wherein the inside of the tool bushing (6) has an annular groove (7), into which the elastic plastic ring (9) held in an annular groove (3) of the tool shaft (2) engages, is designed in a slotted fashion and has at least one rib projecting beyond the outer surface of the plastic ring (9) and extending across at least a portion of the periphery of the plastic ring (9). In order to achieve a proper hold of the rounded-shaft tool (1), the cross-section of the plastic ring (9) exhibits a section (11) which can be pushed inwards and springs outwards in a radial direction and extends across at least a portion of the periphery of the plastic ring (9), wherein said section (11) can be pushed relative to the other sections of the cross-section of the plastic ring (9) from a relaxed initial position with a particular outside diameter (12) larger than the inside diameter (6') of the tool bushing (6) into a fitting position exhibiting a smaller outside diameter corresponding to the inside diameter (6') of the tool bushing (6) and is able to spring back into the relaxed initial position, whereby the total thickness (15) of the relaxed plastic ring (9) exceeds the depth (4) of the annular groove (3) of the tool shaft (2). |
