Clutch device, crankcase ventilation device and fresh air system

摘要

The invention relates to a coupling device (1) for connecting a first fluid line (5) to a second fluid line (6), with a first connection piece (2), which has an external locking contour (7) on its outside and which is connected to the first fluid line ( 5) is connected or can be connected to it, with a second connection piece (3), which has an outer catch contour (8) on its outside and which is connected or can be connected to the second fluid line (6), and with a sleeve (4) , into which both nozzles (2, 3) can be inserted at opposite ends and which on the inside of the outer locking contours (7, 8) have complementary inner locking contours (10, 11) which, when the nozzles (2, 3) are inserted, with the outer locking contours (7, 8) lock. Inexpensive manufacture can be achieved if the internal locking contours (10, 11) are integrally formed on the sleeve (4).