| 摘要 |
<p>The mechanism (15) has a hollow threaded rod (16) comprising a helicoid net (24) in direction. A nut (22) is engaged with the helicoid net. An end (26) of the threaded rod comprises another helicoid net (32) in another direction that is opposite to the former direction. The end of the threaded rod is provided with an axial tapping (30) that is formed in an inner side of the end of the threaded rod to form the latter helicoid net. A counter-nut (34) comprises a threaded axial stud (40) that is engaged with the latter helicoid net.</p> |
