Cycloidal gear and electric bicycle drive unit with cycloidal gear

A cycloidal gear for an electric bicycle drive unit, the cycloidal gear comprising:

• a drive shaft device with a cam arrangement, and an output shaft device, wherein the drive shaft device and output shaft device are arranged concentrically with respect to one another and with respect to a central axis of the cycloidal gear;
• and
• at least one cycloidal disk device having at least two approximately cycloidal or cylindrical cycloidal tooth arrangements, and at least one opposing cycloid device having at least two approximately cycloidal or cylindrical opposing tooth arrangements, wherein the at least one cycloidal disk device and the at least one opposing cycloidal device are configured for torque-transmitting, mutually positive-locking engagement, and wherein the at least one cycloidal disk device and/or the at least one opposing cycloidal device can be brought into an eccentric-cycloidal relative rolling motion relative to the central axis by means of the cam arrangement of a rotary drive, by means of which in contact areas of drive contact between cycloidal disk profiles of the cycloidal tooth arrangements of the at least one cycloidal disk device and opposing cycloidal profiles of the opposing tooth arrangements of the at least one opposing cycloidal disk device, driving forces can be transmitted in a circumferential direction of the cycloidal gear at least within a respective load flank sub-area of the respective profile of the respective tooth arrangement, wherein at least one of the cycloidal tooth arrangements or the opposing tooth arrangements has a relief contour that is setback relative to the profile along a clearance cut area that is arranged outside the respective load flank sub-area of the respective profile of the respective tooth arrangement.