Lösbare Schnellkupplung mit Sicherheitsverrastung

摘要

The invention relates to a detachable quick connector for connecting lines carrying liquids, especially for fuel lines of motor vehicles. The inventive quick connector comprises a tubular insert (3) with a peripheral retaining rib (4), a coupling housing (1) with a cylindrical receiving element (6) for the insert (3) and with a separate retaining element (2) with elastically expandable retaining edges (5) that engage behind the retaining rib (4) when the insert (3) is pushed in. A retaining clip (9) with a second locking mechanism is provided in front of the insertion opening (8) of the housing (1) in case the closing mechanism of the retaining element (2) fails. Said retaining clip (9) comprises a frame (11) adapted to the front (10) of the coupling housing (1), which can be locked in corresponding projections (13) on the exterior of the coupling housing (1) by means of two elastically expandable brackets (12). The frame is linked with locking fingers (16) that are inserted in the receiving element (6) in order to secure locking of the retaining rib (4) once the first retaining element (2) has firmly engaged behind the insert (3). The locking fingers (16) are preferably linked on one end with a support ring (14) that is pulled into the receiving element (6) through the retaining rib (4) at the same time the insert (3) is introduced, thereby automatically accomplishing a security locking of the insert (3).