Patent ID: 11959546
Assignee: SALA DRIVE GMBH
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A drive comprising:
an electric motor; and
a transmission to which the electric motor is configured to be connected at a drive shaft for an electric vehicle;
wherein the transmission comprises at least two gears with different transmission ratios, via which an output shaft can be alternately coupled to the drive shaft in order to achieve different transmission ratios of a rotational speed of the drive shaft to a rotational speed of the output shaft;
wherein the transmission is designed to carry out a shifting process in which a coupling of the drive shaft, driven by the electric motor rotating at a first rotational speed, to the output shaft via a first gear with a first transmission ratio is first released, so that the drive shaft is no longer rotationally coupled to the output shaft, after which the drive shaft is rotationally coupled to the output shaft via a second gear with a second transmission ratio;
wherein an electric synchronizing device is provided with which a rotational speed of the electric motor can be changed to a second rotational speed for a duration of the shifting process;
wherein the second rotational speed corresponds to the first rotational speed multiplied by a quotient of the second transmission ratio and first transmission ratio;
wherein the drive is designed to produce a releasable rotational coupling between the drive shaft and the output shaft via the second gear by a positive engagement;
wherein the drive shaft is configured to be releasably coupled to the output shaft via a gear by at least one dog that engages in a depression; and
wherein the depression is arranged in a window which extends along a direction along which an element coupled to the drive shaft can be moved in relation to an element coupled to the output shaft when the output shaft is not coupled to the drive shaft during a shifting process, so that the dog can be moved into the depression through the window from an uncoupled state.