Earth working machine having a shiftable transmission between a drive motor and a rotatable working apparatus

An earth working machine, comprising:

• a drive motor;
• a milling drum;
• and
• a shiftable transmission connecting the drive motor to the milling drum for transfer of a torque to rotate the milling drum at a plurality of selectable transfer ratios, the shiftable transmission including:
• an input shaft coupled to the drive motor;
• an output shaft coupled to the milling drum;
• a first power takeoff shaft;
• a second power takeoff shaft;
• a first gear set whereby the input shaft drives the first power takeoff shaft;
• and
• a second gear set whereby the input shaft drives the second power takeoff shaft;
• wherein the output shaft is coupled to the milling drum by a planetary gearset assemblage connected to the milling drum, and a belt drive connected between the shiftable transmission and the planetary gearset assemblage.

An earth working machine, comprising:

• a drive motor;
• a milling drum;
• a shiftable transmission connecting the drive motor to the milling drum for transfer of a torque to rotate the milling drum at a plurality of selectable transfer ratios, the shiftable transmission including:
• an input shaft coupled to the drive motor;
• an output shaft coupled to the milling drum;
• a first power takeoff shaft;
• a second power takeoff shaft;
• a first gear set whereby the input shaft drives the first power takeoff shaft;
• and
• a second gear set whereby the input shaft drives the second power takeoff shaft;
• and
• a first pair of hydraulic pumps driven by the first power takeoff shaft.

An earth working machine, comprising:

• a drive motor;
• a milling drum;
• a shiftable transmission connecting the drive motor to the milling drum for transfer of a torque to rotate the milling drum at a plurality of selectable transfer ratios, the shiftable transmission including:
• an input shaft coupled to the drive motor;
• an output shaft coupled to the milling drum;
• a first power takeoff shaft;
• a second power takeoff shaft;
• a first gear set whereby the input shaft drives the first power takeoff shaft;
• and
• a second gear set whereby the input shaft drives the second power takeoff shaft;
• and
• a pinion gear attached to the input shaft, the pinion gear being a part of both the first gear set and the second gear set.