Abstract: A rotor arrangement for an electric motor is disclosed. The rotor arrangement comprises a first rotor comprising a hollow cylinder and a cylindrical rotor stack shrink-fitted onto the hollow cylinder. The first rotor comprises a first end plate attached to a first end portion of the hollow cylinder. The rotor arrangement further comprises a rotor shaft comprising a first shaft member and a second shaft member arranged coaxially to the first shaft member. The first shaft member is connected to a connection portion of the first end plate. The rotor arrangement comprises a second rotor connected to the second shaft member. The present disclosure further relates to an electric propulsion motor arrangement, a vehicle, and a set of rotors for electric motors.

Abstract: A rotor arrangement for an electric motor is disclosed. The rotor arrangement comprises a first rotor comprising a hollow cylinder and a cylindrical rotor stack shrink-fitted onto the hollow cylinder. The first rotor comprises a first end plate attached to a first end portion of the hollow cylinder. The rotor arrangement further comprises a rotor shaft comprising a first shaft member and a second shaft member arranged coaxially to the first shaft member. The first shaft member is connected to a connection portion of the first end plate. The rotor arrangement comprises a second rotor connected to the second shaft member. The present disclosure further relates to an electric propulsion motor arrangement, a vehicle, and a set of rotors for electric motors.

Abstract: The invention relates to a gear wheel (10; 20) comprising: a hub (15; 25) with respective first and second axial ends and intended to be arranged round an axis of rotation, at least one of which first and second axial ends of the hub has integral coupling devices (16; 26) intended to lock the gear wheel (10; 20) rotationally in relation to the gear wheel hub of an adjacent gear wheel; a circular gear ring (11; 21) with respective first and second axial ends and an outer periphery which is provided with a toothed rim (12; 22); and at least one intermediate wall (14; 24) which links the gear ring (11; 21) and the hub (15; 25) in such a way that the hub (15; 25) is fixed at substantially the centre of the gear ring (11; 21); which gear ring (11; 21) and hub (15, 25) are two separate parts joined together by an fastening connection (17; 27) to form a gear wheel (10; 20).