Abstract: The invention concerns a drive shaft (1) having gear heads (9) in each one of which is mounted a liquid-cooled disc brake (19) and a planetary gear (18). In order to improve the cooling of the disc brakes (19), collection and guide elements (32) are coordinated with the bevel wheel (11) of a differential gear (12). The collection and guide elements (32) can consist of a trap (41) or of strippers (49, 50). A shifting of coolant in the gear heads (9) takes place during operation. The object of the invention is applied in particular to heavy utility vehicles such as wheel loaders where the disc brakes (19) are used frequently and must be reliably cooled.

Abstract: The invention concerns a liquid-cooled multi-disc brake (29) as used in transmission systems. The object of the invention is to improve the cooling of a multi-disc brake (29) exposed to high stresses owing to frequent use. In order to increase the throughput of coolant through the multi-disc brake (29) and to intensity the coolant circulation, one inner disc carrier (10) of the multi-disc brake (29) is designed as feeder wheel (48). Such a characterized multi-disc brake (29) is preferably used within the transmission system for heavy construction vehicles such as wheeled loaders, since liquid-cooled multi-disc brakes (29) in these utility vehicles are frequently used at full engine power. However, the use of the multi-disc brake (29) according to the invention is not limited to this particular application.