US 12,294,260 B2
Electric machine, displacement device for an electric machine, and powertrain for a motor vehicle
Holger Witt, Bühl (DE); Christoph Raber, Ottweiler-Steinbach (DE); Dennis Kuhl, Bühl (DE); and Christian Morgen, Haueneberstein (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 18/007,868
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed May 3, 2021, PCT No. PCT/DE2021/100394
§ 371(c)(1), (2) Date Dec. 2, 2022,
PCT Pub. No. WO2021/244696, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. 102020114855.0 (DE), filed on Jun. 4, 2020.
Prior Publication US 2023/0231454 A1, Jul. 20, 2023
Int. Cl. H02K 21/02 (2006.01); H02K 7/12 (2006.01); H02K 21/24 (2006.01)
CPC H02K 21/026 (2013.01) 11 Claims
OG exemplary drawing
 
1. An electric machine formed as a permanently excited synchronous machine, comprising:
a rotor having at least one rotor body arranged on a rotor shaft and having a plurality of magnet elements designed as permanent magnets;
a stator;
the at least one rotor body and the stator being arranged axially movable relative to one another along an axis of rotation of the electric machine, and the at least one rotor body being acted upon by a spring force directed away from the stator in the axial direction via a spring element, the spring element being supported by a support element that is arranged in a floating manner on the rotor shaft;
at least one displacement device configured to generate the relative axial movement between the at least one rotor body and the stator as a function of a torque occurring between the rotor shaft and the at least one rotor body in a direction of the stator;
wherein the at least one displacement device has a first displacement element a second displacement element, and at least one rolling body arranged between the first displacement element and the second displacement element;
wherein the first displacement element is arranged axially movable and rotatable at least in a limited manner on the rotor shaft which is axially non-movable, and the second displacement element is connected to the rotor shaft in a rotationally fixed and non-movable manner;
wherein the first displacement element has a first ramp element on a side thereof facing the second displacement element and the second displacement element has a second ramp element on a side thereof facing the first displacement element, and the first ramp element and the second ramp element are arranged such that, upon a rotation of the first displacement element relative to the second displacement element or vice versa, the at least one rotor body is pushed axially on the rotor shaft against the spring force; and
a stop is arranged on an axial end of the support element, which stop acts as stationary stop to limit an axial displacement path of the respective rotor body in a direction of the stator body.