Kopplingsanordning för frigörbar drivning av en axel, winchtrumma eller dylikt

摘要

The coupling comprises a hollow drive shaft (1), two cooperating coupling parts (2, 3) with a blocking function, and a coupling shaft (4) connected to the first coupling part (2) and movable in an axial direction via a cavity (5) in the drive shaft. The first coupling part rotates with the drive shaft, can be moved axially in the drive shaft length direction and is spring-loaded so that it is normally engaged with the second coupling part (3). When the two coupling parts are not engaged with each other the second coupling part is free to rotate about the drive shaft, irrespective of the drive shaft rotation direction. A mechanism (6-8) is used to move the coupling shaft in an axial direction so that the spring-loading on the first coupling part is overcome, releasing it from the second coupling part when the drive shaft is rotated a given angle in the drive direction.