Rotary coupling for two coaxial shafts

摘要

The coaxial shafts (11,25) each comprise an end (10,26) opposite the other which is liable to approach the other by a relative translation along the geometrical rotational axis (15). A compressible metal bellows (50) is located between the shaft ends. The coupling (30) is active when the shafts are brought together and inactive when the shaft ends are separated. The coupling has rotational driving female and male parts (31,40). The female part comprises two hollows (32) the opening (33) of which is turned towards the end of the second shaft. The hollows each have two female sides (34) which are widened towards the opening. The male part comprises two teeth (41) the top (42) is turned towards the end of the first shaft. The teeth each comprise two male sides (43) which penetrate the hollows when the two shafts are brought together.