A lift cylinder arrangement is disclosed for a hydraulic support frame for underground
mining. The support frame has a lift cylinder for lifting the base shoes during
advancing, which is supported on the one hand on a return rod and on the other
hand, in a pivoting manner, with an end supporting head to a drawbar connected
to the base shoes. In order to allow a simple, rapid and reliable connection between
the supporting head and the drawbar, the supporting head is connected to the drawbar
by a plug-type locking system comprising two plug-type locking elements, which
include first locking notches on the drawbar, and arranged complementarily thereto
second locking notches on the supporting head, whereby the plug-type locking elements
engage in at least one of the locking notches with clearance.