Drive device for a motor vehicle and motor vehicle
The annular oil reservoir design for electric vehicles addresses the challenge of compact lubrication and cooling by integrating a single reservoir for dual traction machines, enhancing efficiency and reducing space requirements while maintaining reliable oil supply.
Patent Information
- Application Number
- DE102024102785
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-07-31
AI Technical Summary
Existing drive devices for electric vehicles face challenges in providing a reliable and compact lubrication and cooling system for electric traction machines, particularly in all-wheel drive configurations, where separate oil reservoirs are needed for each machine, leading to increased complexity and space requirements.
An annular oil reservoir is arranged concentrically with the rotor's axis, fixed relative to the stator, and supplies oil to both traction machines, forming a closed circuit, which reduces radial dimensions and simplifies the drive device design by integrating a single reservoir for both machines.
This configuration allows for a compact, efficient, and reliable lubrication and cooling system that minimizes space usage and reduces torque losses, while ensuring stable oil supply during vehicle maneuvers.
Smart Images
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Abstract
Claims
[1] Drive device (10) for a motor vehicle, with at least one electric traction machine (12) which comprises a stator (16) and a rotor (20) which is rotatable about an axis of rotation (22) relative to the stator (16), and with an annular oil reservoir (14) which is designed to temporarily store oil and to provide it for at least one component of the electric traction machine (12), wherein the oil reservoir (14) is arranged with its central axis concentric with the axis of rotation (22) of the rotor (20). [2] Drive device (10) according to claim 1, characterized by that the at least one electric traction machine (12) is designed as an axial flux machine. [3] Drive device (10) according to claim 1 or 2, characterized by that the oil reservoir (14) is fixed in a rotationally fixed manner relative to the stator (16). [4] Drive device (10) according to one of the preceding claims, characterized bythat the oil reservoir (14) is arranged in front of or behind the electric traction machine (12) with respect to an axial direction (A) running parallel to the axis of rotation (22). [5] Drive device (10) according to one of the preceding claims, characterized by in that the drive device (10) comprises two electric traction machines (12) which are arranged with their axes of rotation (22) concentrically to one another, and the oil reservoir (14) is arranged between the two electric traction machines (12) with respect to an axial direction (A) running parallel to the axis of rotation (22). [6] Drive device (10) according to claim 5, characterized by that the oil reservoir (14) is designed to provide oil for components of both electric traction machines (12). [7] Drive device (10) according to one of the preceding claims, characterized bythat a radial outer diameter (D) of the oil reservoir (14) corresponds to at least 50%, in particular at least 70% of the radial outer diameter of the at least one electric traction machine (12). [8] Motor vehicle with a drive device (10) according to one of the preceding claims.
Citation Information
Patent Citations
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