Patent ID: 11892063
Assignee: HÖHN GMBH
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 0:
1. A transmission for an electric drive system for a vehicle, including:
a housing,
an input shaft supported in the housing to be rotatable about a rotational axis,
an output shaft supported in the housing to be rotatable about the rotational axis,
a first planetary transmission and a second planetary transmission disposed adjacent to each other coaxially with the rotational axis, and having different gear ratios with respect to each other, wherein the first planetary transmission and the second planetary transmission include a common planetary carrier supported in the housing to be rotatable about the rotational axis and connected to the output shaft, the first planetary transmission includes a first ring gear supported in the housing to be rotatable around the rotational axis, and the second planetary transmission includes a second ring gear supported in the housing to be rotatable about the rotational axis,
a locking device configured to selectively lock the first ring gear or the second ring gear to the housing so that, when the first ring gear is locked to the housing, torque is transmissible from the input shaft to the output shaft via the first planetary transmission at a first gear ratio and, when the second ring gear is locked to the housing, torque is transmissible from the input shaft to the output shaft via the second planetary transmission at a second gear ratio,
wherein:
the locking device includes:
a sliding sleeve disposed in the housing to be non-rotatable relative to the housing while being axially movable along the rotational axis, the sliding sleeve having an internal gearing,
a first synchronizer body rigidly connected to the first ring gear or formed integrally therewith, the first synchronizer body having an external gearing configured to be bringable into engagement with the internal gearing of the sliding sleeve by moving the sliding sleeve along the rotational axis into a first position,
a second synchronizer body rigidly connected to the second ring gear or formed integrally therewith, the second synchronizer body having an external gearing configured to be bringable into engagement with the internal gearing of the sliding sleeve by moving the sliding sleeve along the rotational axis into a second position, and
a displacing device having an actuator configured to displace the sliding sleeve along the rotational axis between the first position and the second position,

the first synchronizer body has a first friction region on a side facing the second synchronizer body, and the second synchronizer body has a second friction region on a side facing the first synchronizer body,
a first synchronizer ring has an external gearing configured to be bringable into engagement with the internal gearing of the sliding sleeve by actuating the actuator to move the sliding sleeve along the rotational axis,
the first synchronizer ring has a third friction region configured to abut against the first friction region of the first synchronizer body,
a second synchronizer ring has an external gearing configured to be bringable into engagement with the internal gearing of the sliding sleeve by actuating the actuator to move the sliding sleeve along the rotational axis,
the second synchronizer ring has a fourth friction region configured to abut against the second friction region of the second synchronizer body,
the locking device is configured to actuate the actuator to move the sliding sleeve along the rotational axis into a synchronization position, in which the internal gearing of the sliding sleeve is not in engagement with the external gearings of the first and second synchronizer bodies while simultaneously the internal gearing of the sliding sleeve is at least partially in engagement with the external gearings of both of the first and second synchronizer rings, and force is exerted by the sliding sleeve in the direction of the rotation axis onto one of the first or second synchronizer rings such that the corresponding first or second synchronizer body is brakeable by the friction engagement with said one of the first or second synchronizer rings, and
the fourth friction region of the second synchronizer ring and the first friction region of the second synchronizer body are dimensioned such that both the fourth friction region of the second synchronizer ring and the first friction region of the second synchronizer body have a torque capacity sufficient to transmit torque to the output shaft in the synchronization position while the sliding sleeve moves from the first position into the second position.