Transmission with hydraulic motor and reduction gearing - has two separate clutches operated by common pressure line to operate gearing and to control parking brake

摘要

The hydraulic motor (1) is separated from the reduction gearing (3) by two sets of clutches (7, 8) operated from the same pressure duct (6). One clutch connects the motor to the gearing with positive pressure while the other holds off the parking brake. The parking brake is operated by cap springs (10) which can be locked into the released position when the vehicle has to be towed. The reduction gearing can be multi-ratio. USE/ADVANTAGE - Multi ratio transmission has simple hydraulic control with only one control duct, failsafe operation.