Electric Vehicle Axle Mounting Structure for Vibration-Robust Integration
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Solution Overview
Problem
Existing vehicle axles with integrated electrical machines face challenges in achieving robust and reliable integration, efficient cooling, and maintenance accessibility while minimizing weight and size.
Innovation Solution
The electrical machine is directly attached to a stop surface on the support frame's connecting section, allowing for a rigid and compact integration, with additional components like damping elements and transmissions, and a design that minimizes dynamic loads and maximizes space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrical machine is attached to four motor mounts on two struts of the supporting frame, then the electrical machine can be integrated into the vehicle axle, but the electric motor follows the deformations of the struts and transmits dynamic loads such as shocks or vibrations to connected components, leading to damage
Solution Approach 1:
The patent introduces a rigid connecting section as an intermediary element between the supporting frame and the electrical machine. This connecting section is rigidly connected to the supporting frame while providing a stable mounting surface for the electrical machine, thereby mediating the connection and preventing the transmission of dynamic loads and vibrations to the electrical machine components.
2Volume of moving object
If the electrical device is integrated into the receiving opening of the support frame, then compact integration is achieved, but accessibility for maintenance and cooling becomes difficult
Solution Approach 1:
The patent segments the electrical device into modular components that can be independently accessed. The electrical machine is mounted on the connecting section in a manner that allows individual components to be accessed for maintenance while maintaining compact integration within the support frame structure.
3Weight of moving object
If the electrical machine is integrated with minimal weight and size, then weight reduction is achieved, but robust and reliable integration becomes challenging
Solution Approach 1:
The patent merges the electrical machine mounting function with the supporting frame structure through the rigid connecting section. This integration eliminates the need for separate heavy mounting brackets or additional support structures, achieving weight reduction while maintaining robust integration through the unified structural design.
Data Source
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AI summary
A vehicle axle comprising a support frame (4) that defines a receiving opening (6), and an electrical device (8) comprising an electric machine (10), wherein the electric machine (10) can be operated in motor and/or generator mode. The electrical device (8) is received in the receiving opening (6) of the support frame (4) and attached to the support frame (4). A rotatably mounted wheel head (24) is arranged on each axle stub (20, 22), wherein the wheel head (24) can be accelerated and/or decelerated by means of the electric machine (10), and wherein each axle stub (20, 22) is arranged on a connecting section (26, 28) of the support frame (4).The connecting section (26, 28) has an outer surface (30, 34) facing the respective wheel head (24) and an inner surface (32, 36) facing the receiving opening (6), wherein the electrical device (8) is arranged on a stop surface (38, 40) of the inner surface (32, 36) of the connecting section (26, 28) facing the receiving opening (6).