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

Claim 30:
31. A method for operating a drive according to claim 1, that comprises the electric motor and the transmission connected to the electric motor, wherein the transmission comprises the at least two gears with different transmission ratios via which the output shaft can be coupled to the drive shaft in order to achieve different transmission ratios of the rotational speed of the drive shaft to the rotational speed of the output shaft, the method comprising:
a shifting process occurs in which a rotational coupling of the drive shaft, driven by the electric motor rotating at the 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 the second gear with the second transmission ratio;
wherein the rotational speed of the electric motor is changed to roughly the second rotational speed by an electric synchronizing device for the duration of the shifting process in that the electric motor is accelerated or braked, wherein the second rotational speed corresponds to the first rotational speed multiplied by the quotient of the second transmission ratio and first transmission ratio; and, after which,
rotationally coupling the drive shaft to the output shaft by positive engagement.