HVAC Motor Support Assembly With Anti-Tilt Vibration Isolation
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Solution Overview
Problem
Motor vehicle heating, ventilation, and air conditioning devices face challenges in reducing the transmission of vibrations from electric motors, leading to premature wear and noise due to the lack of effective vibration isolation.
Innovation Solution
A support assembly featuring coaxial inner and outer rings with anti-tilt fingers and pegs that limit tilting and travel, combined with an uncoupling element made of elastomer material to dampen vibrations, is used to isolate the motor from the vehicle structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric motor is directly fixed to the vehicle structure, then the motor is securely supported, but vibrations and noise are transmitted to the vehicle structure causing premature wear
Solution Approach 1:
The patent introduces an uncoupling element made of elastomer material as an intermediary between the inner ring (supporting the stator) and the outer ring (fixed to the vehicle structure). This intermediary absorbs vibrations and acoustic frequencies, preventing their transmission to the vehicle structure while maintaining secure motor support.
Solution Approach 2:
The uncoupling element is made of elastomer material, a composite material that combines properties of both flexibility and structural integrity. This material can deform to absorb vibrations while maintaining the mechanical connection between the rings, thus reducing vibration transmission without compromising support stability.
2Object-affected harmful factors
If the uncoupling element allows free movement between inner and outer rings, then vibration isolation is improved, but excessive relative movement and tilting occur reducing assembly reliability
Solution Approach 1:
The patent employs anti-tilt fingers that can dynamically adjust their position within their respective orifices. These fingers allow controlled movement to isolate vibrations while automatically limiting excessive displacement and tilting through geometric constraints, thus maintaining assembly stability during motor operation.
Solution Approach 2:
The anti-tilt fingers change the movement parameters of the uncoupling element by providing geometric constraints. They allow vibrations within certain amplitude limits while preventing excessive relative movement and tilting between the rings, effectively controlling the movement characteristics to maintain both vibration isolation and assembly stability.
3Ease of manufacture
If the support assembly uses simple rigid connection between rings, then manufacturing is easier, but vibration transmission causes premature wearing of the assembly
Solution Approach 1:
The uncoupling element serves as a mediator between the inner and outer rings, replacing a simple rigid connection with a vibration-absorbing interface. While this adds a component, it significantly extends assembly durability by preventing vibration-induced wear, making the overall assembly more reliable despite slightly increased manufacturing complexity.
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 solution effectively reduces the transmission of vibrations and noise, enhancing the durability and performance of the heating, ventilation, and air conditioning devices by decoupling the motor's vibrations from the vehicle's structure.
Implementation Method 1
its main role is to filter the acoustic frequencies and vibrations generated by the motor and to eliminate or, at the very least, limit as far as possible, the transmission thereof
Implementation Method 2
This uncoupling element is made in a material capable of performing the role expected of it in terms of the mechanical and acoustic vibrations (for example an elastomer material)
Data Source
AI summary
The invention relates to an assembly for supporting a motor (1), which comprises two coaxial rings, these being an inner ring (3) able to receive one or more elements of the said motor and an outer ring (4) able to be fixed to a housing forming a structural element (2). The assembly comprises means for limiting the tilting of the inner ring (3) with respect to the outer ring (4), these means including an element (34) which projects from a first of the two rings to become housed in a housing (42) formed in the second of the two rings, and means (7, 22) for reducing the excursion of the element (34) inside the said housing.