| 摘要 |
Device for a coupling between mechanical shafts (21, 25) with a helical spring (50) placed around two cylindrical components (30, 40) fixed to the two shafts, the ends being fixed to two collars (60, 70) that surround said spring (50) and a control collar (80) on which are triangular radial tabs (81) which, by an axial movement engaging or disengaging themselves between the raised pieces (72) on the first collar (70) and the teeth (62) on the second collar (60), cause rotations to be made in opposite directions for winding or unwinding the spring (50) and so for determining adherence or detachment, to said cylindrical components (30, 40).
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