Diagonal Axle Suspension for Electric Machine Vibration Filtration
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Solution Overview
Problem
Existing suspension architectures for electric machines in vehicles, such as pendulum and set architectures, are inadequate in managing the specific suspension modes of both the train and the electric machine, leading to inefficient vibration filtration and discomfort for occupants.
Innovation Solution
A diagonal suspension architecture is introduced, centered on the Y axis passing through the center of gravity of the electric machine, using tubular elements and anti-vibration fixing elements with elastomer-type filters to decouple and effectively manage suspension modes, thereby optimizing the positioning and filtration of vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pendulum or set suspension architectures are used for electric machines, then the machine can be mounted in the vehicle, but the suspension modes of the train and the electric machine cannot be effectively decoupled, leading to poor vibration filtration
Solution Approach 1:
The suspension system is segmented into two independent subsystems: one for suspending the electric machine (with its own pivot joints and anti-vibration elements) and another for the train suspension. This segmentation allows each subsystem to be optimized independently, effectively decoupling their suspension modes and improving vibration filtration effectiveness.
Solution Approach 2:
An intermediate suspension structure is introduced between the electric machine and the train, comprising pivot joints and anti-vibration elements. This intermediary structure acts as a mediator that isolates the electric machine's vibrations from the train, enabling effective vibration filtration while maintaining manageable system complexity.
2Volume of moving object
If the electric machine is suspended inside the axle, then space is optimized, but vibrations from both the wheels and the machine are transmitted to the body, causing occupant discomfort
Solution Approach 1:
Anti-vibration elements are introduced as intermediary components between the electric machine and the axle, and between the axle and the vehicle body. These elements act as vibration filters that attenuate harmful vibrations while allowing the compact in-axle mounting arrangement to be maintained.
Solution Approach 2:
The suspension system uses composite structures combining rigid components (for structural support and space optimization) with flexible anti-vibration elements (for vibration filtration). This composite approach enables both compact space utilization and effective vibration isolation, reducing occupant discomfort.
3Strength
If six suspension modes are coupled together in the electric machine, then the machine can be supported, but the modes become difficult to parameterize and optimize
Solution Approach 1:
The six suspension modes are segmented into two independent groups: three modes for the electric machine suspension (handled by pivot joints and anti-vibration elements) and three modes for the train suspension (handled by the axle suspension system). This segmentation makes each group independently parameterizable and optimizable, while maintaining overall support capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This diagonal architecture allows for efficient filtration of vibrations generated by both the wheels and the electric machine, reducing discomfort for occupants by decoupling suspension modes and distributing forces effectively, enabling the design of simpler and less costly parts.
Implementation Method 1
an elastomer-type filter material housed in said bore
Implementation Method 2
an elastomer-type filter material housed in said bore
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to an assembly for hanging a vibration-generating member (8) attached inside an axle (3) of a running gear of a vehicle, in particular an automobile, said member (8) being attached to the axle (3) by at least one first (9A), one second (9B) and one third (9C) anti-vibration attachment elements, the three attachment elements (9A, 9B, 9C) not being on the same horizontal plane XY, said attachment elements (9A, 9B, 9C) providing isostatic hanging of the member (8) in the axle (3), and in which the first and second attachment elements (9A and 9B) are arranged separated from one another and aligned on a diagonal connecting the centre of the first attachment element (9A) with the centre of the second attachment element (9B), passing through the centre of gravity of the member (8); the third attachment element (9C), separated from the first and second attachment elements (9A, 9B), does not pass through said diagonal line; and the centre of the third attachment element (9C) and the centre of gravity of the member (8) pass through the same horizontal plane XY.