| 摘要 |
A tensioning nut to secure a disk-shaped tool (6) is threadable onto the threaded spindle (5) of an electric tool, particularly an electric hand tool with run-out brake such as a right-angle grinder. The nut includes a nut body (1) provided with a corresponding thread, with a coaxially-positioned pressure ring (3) that may be tensioned with the disk-shaped tool (6). An axial bearing (9) is positioned between the ring (3) and the nut body (1). The nut further includes a blocking disk (8) within the nut body (1) for preventing rotation of the pressure ring. At least one blocking body (16, 18) is positioned between the blocking disk and the surrounding wall (14, 19) of the nut body (1). This blocking mechanism forms a uni-directional coupling, whereby a disengagement exists between the nut body (1) in its tensioning direction and the blocking disk (8), and locking occurs between both of them in the opposing direction of the nut body (1) relative to the blocking disk (8). Thus, loosening of the tensioning nut is prevented particularly during run-out of the rotating, disk-shaped tool.
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