| 摘要 |
A releasable coupling 10 includes a first element 12 which is rotatable about a rotational axis 18. A second element 14 is axially aligned with the first element 12, the first element 12 and the second element 14 being axially displaceable relative to each other. The first element 12 and the second element 14 define complementary drive formations 24, 26 which, when the first element 12 and the second element 14 abut axially are engaged with each other, and when the first element 12 and the second element 14 are spaced axially from each other by a predetermined amount are disengaged from each other. A connecting member 16 releasably couples the first element 12 and the second element 14 together, the connecting member 16 being connected to the first element 12 and the second element 14 in such a manner that, when the drive formations 24, 26 of the first element 12 and the second element 14 are disengaged and the first element 12 is rotated in a predetermined direction, the connecting member 16 is disconnected from the second element 14.
|
