US 11,859,717 B2
Earth working machine having a shiftable transmission between a drive motor and a rotatable working apparatus
Christian Berning, Zülpich (DE); Tobias Stinner, Weyerbusch (DE); Cyrus Barimani, Königswinter (DE); and Hardy Wilhelmi, Dattenberg (DE)
Assigned to WIRTGEN GmbH
Filed by Wirtgen GmbH, Windhagen (DE)
Filed on May 25, 2022, as Appl. No. 17/824,082.
Application 17/824,082 is a continuation of application No. 16/928,420, filed on Jul. 14, 2020, granted, now 11,346,443.
Application 16/928,420 is a continuation of application No. 15/916,529, filed on Mar. 9, 2018, granted, now 10,718,431, issued on Jul. 21, 2020.
Claims priority of application No. 10 2017 204 336.9 (DE), filed on Mar. 15, 2017.
Prior Publication US 2022/0403931 A1, Dec. 22, 2022
Int. Cl. F16H 61/682 (2006.01); F16H 61/688 (2006.01); F16H 3/091 (2006.01); F16H 1/28 (2006.01); F16H 7/22 (2006.01); F16H 57/033 (2012.01); E01C 23/088 (2006.01); F16H 57/02 (2012.01)
CPC F16H 61/688 (2013.01) [F16H 1/28 (2013.01); F16H 3/0915 (2013.01); F16H 7/22 (2013.01); F16H 57/033 (2013.01); E01C 23/088 (2013.01); F16H 2057/02056 (2013.01); F16H 2200/0034 (2013.01)] 11 Claims
OG exemplary drawing
 
1. 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, the shiftable transmission including:
an input shaft coupled to the drive motor;
an output shaft coupled to the milling drum;
a first gearing stage having a first torque transfer ratio, the first gearing stage being configured to connect the input shaft to the output shaft for transfer of torque and so as to move the input shaft and the output shaft rotationally together at the same rotation speed; and
a second gearing stage having a second torque transfer ratio different from the first torque transfer ratio, the second gearing stage including a transmission assemblage configured to connect the input shaft to the output shaft for transfer of torque and so as to move the input shaft and the output shaft rotationally together at different rotation speeds; and
a plurality of power takeoffs configured such that all of the plurality of power takeoffs are always being rotationally driven when the input shaft is driven regardless of the activation of the first or second gearing stage;
wherein the second gearing stage includes:
an intermediate shaft;
a first transmission sub-assemblage of the transmission assemblage, the first transmission sub-assemblage connecting the intermediate shaft to the input shaft;
a second transmission sub-assemblage of the transmission assemblage, the second transmission sub-assemblage connecting the intermediate shaft to the output shaft; and
an intermediate clutch having a first engagement state in which torque transfer from the input shaft to the output shaft is established via the intermediate shaft and the intermediate clutch, and the intermediate clutch having a second engagement state in which torque transfer from the input shaft to the output shaft via the intermediate shaft and the intermediate clutch is interrupted.