Parallel shift transmission

A parallel shift transmission for a motor vehicle, the parallel shift transmission comprising:

• a split group (2);
• a range group (3);
• each of the split group (2) and the range group (3) being divided into two parallel transmission branches (5, 6);
• one of the transmission branches (5, 6) being selectable by actuating one respectively corresponding load shift element so that rotational movement of a drive shaft (1;
• 25) is transferred, via one of a plurality of transmission ratios of the split group (2), to countershafts (7 to 10;
• 13 to 16;
• 7, 9, 20, 21, 22, 23) according to the selection of one of the transmission branches (5, 6) so that the rotational movement of the drive shaft is converted and transmitted, via one of a plurality of range ratios of the range group (3), into rotational movement of an output drive shaft (4;
• 19);
• each of the transmission ratios is defined by shifting a correspondingly associated gear stage of a plurality of gear stages (A1 to A8) of the split group (2), which are alternately distributed to the two transmission branches (5, 6) in a sequence of the corresponding transmission ratio, and each of the range ratios is set by shifting a correspondingly associated group stage of a plurality of group stages (B1.1 to B3.2) of the range group (3);
• and
• the load shift elements being designed as individual clutches (11, 12), each of which is arranged in the associated transmission branch (5, 6) between an output-side counter shaft (7, 9;
• 14, 17) of the split group (2) and a drive-side counter shaft (8, 10;
• 15, 18;
• 20, 22) of the range group (3).

A parallel shift transmission for one of an agricultural and a municipal utility vehicle, the parallel shift transmission comprising:

• a split group and a range group, each of the split group and the range group comprising first and second countershafts,
• the first countershafts of the split group and the range group being coaxially aligned with one another and defining a first transmission branch, and the second countershafts of the split group and the range group being coaxially aligned with one another and defining a second transmission branch, and the first and the second transmission branches extending parallel to one another;
• each of the first and the second transmission branches comprising a clutch that is located between the split group and the range group, the first countershaft of the split group being connectable, via the clutch of the first transmission branch, to the first countershaft of the range group, and the second countershaft of the split group being connectable, via the clutch of the second transmission branch, to the second countershaft of the range group, and only one of the clutches of the first and the second transmission branches being engagable at a time for transmitting rotation from an input shaft to a output shaft along one of the engaged first or second transmission branches;
• the split group comprising a plurality of gear stages and each one of the gear stages of the split group defining two gear ratios and comprising gearwheels that engage each other and are supported by the input shaft, the first and the second countershafts of the split group, the gear ratios of the split group being arranged alternately on the first and the second countershafts of the split group in sequence in an axial direction;
• the range group comprising a plurality of gear stages and each one of the gear stages of the range group defining two gear ratios and comprising gearwheels that engage each other and are supported by the output shaft, the first and the second countershafts of the range group, the gear ratios of the range group being arranged alternately on the first and the second countershafts of the range group in sequence in an axial direction;
• and
• a plurality of transmission ratios being sequentially engagable by engagement of corresponding gear ratios of the split group and the range group and alternate engagement of the clutches of the first and the second transmission branches.