US 11,852,223 B2
Drive arrangement of a working machine to be driven with a variably adjustable speed and method for operating the drive arrangement
Peter Boiger, Augsburg (DE); and Michael Heider, Oberottmarshausen (DE)
Assigned to RENK GmbH, Augsburg (DE)
Filed by RENK GmbH, Augsburg (DE)
Filed on Jun. 28, 2022, as Appl. No. 17/851,703.
Claims priority of application No. 10 2021 206 701.8 (DE), filed on Jun. 28, 2021.
Prior Publication US 2022/0412442 A1, Dec. 29, 2022
Int. Cl. F16H 37/08 (2006.01); F16H 3/72 (2006.01); B60K 17/04 (2006.01)
CPC F16H 37/0806 (2013.01) [B60K 17/04 (2013.01); F16H 3/72 (2013.01); F16H 37/08 (2013.01); F16H 3/724 (2013.01); F16H 3/727 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A drive arrangement of a working machine to be driven at a variably adjustable speed, comprising
a differential gear;
a first drive unit coupled to a first element of the differential gear;
a working machine coupled to a second element of the differential gear;
a second drive unit coupled to a third element of the differential gear, such that the speed of the second drive unit can be superimposed on a speed that is dependent on the speed of the first drive unit;
wherein the first drive unit or the second drive unit are driveable at variably adjustable speeds;
an auxiliary gear stage; and
a switching element cooperating with the auxiliary gear stage and operable such that:
when the switching element is closed, the auxiliary gear stage is load-transmitting and the speeds of the first drive unit and the second drive unit are coupled as a function of at least one transmission ratio of the auxiliary gear stage, and
when the switching element is open, the auxiliary gear stage is load-free and the speeds of the first drive unit and the second drive unit are decoupled;
wherein one of:
(a) the second drive unit is permanently coupled in a rotationally fixed manner to a first element of the auxiliary gear stage,
a second element of the auxiliary gear stage, together with the first drive unit, is permanently coupled in a rotationally fixed manner to the first element of the differential gear, and
the switching element, in the closed state, couples a third element of the auxiliary gear stage to a housing; or
(b) the second drive unit is permanently coupled in a rotationally fixed manner to a fourth element of the auxiliary gear stage,
a fifth element of the auxiliary gear stage, together with the working machine, is permanently coupled in a rotationally fixed manner to the second element of the differential gear, and
the switching element, in the closed state, couples a sixth element of the auxiliary gear stage to the housing.