Drive unit for an electric bicycle, having a sealing element

An electric bicycle comprising:

• a drive unit for an electric bicycle, comprising:
• a housing, in the interior of which an electric motor is arranged for the externally powered generation of motor torque,
• an output element for providing a drive torque for driving the electric bicycle, which is arranged outside the housing and is operatively connected to the electric motor via an output shaft for transmitting the motor torque to the output element,
• wherein the output shaft has an inner portion which is arranged in the interior of the housing and serves to receive the motor torque from the electric motor, and an outer portion which is arranged outside the housing and on which the output element is arranged to receive the motor torque from the output shaft,
• wherein the housing has a housing opening through which the output shaft protrudes from the housing with the outer portion, a sealing element on the housing opening for sealing the interior of the housing at the output shaft, wherein a counter element arranged on the output shaft and having a support surface located radially outward of a rotational axis of the output shaft, on which the sealing element is radially supported on the counter element,
• wherein the output element abuts against the counter element.