H-Shaped Elastomer Motor Support for HVAC Vibration Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor supports for heating, ventilation, and air conditioning devices in motor vehicles face challenges in effectively decoupling vibrations, leading to potential breakage of decoupling elements and increased noise within the vehicle.
Innovation Solution
A motor support design featuring two coaxial rings with a decoupling means comprising H-shaped elastomeric blocks interposed between the rings, which enhances mechanical endurance while maintaining a low natural frequency to reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the decoupling element allows significant relative movement between the inner ring and outer ring to reduce vibration transmission, then the vibration isolation performance is improved, but the mechanical endurance deteriorates due to repeated movements leading to breakage
Solution Approach 1:
The decoupling element is segmented into multiple blocks made of elastomeric material interposed between the inner ring and outer ring. This segmentation allows each block to independently deform and absorb vibration energy while maintaining structural integrity, resolving the contradiction between vibration isolation and mechanical endurance
Solution Approach 2:
The patent specifies precise geometric parameters for the H-shaped blocks, including the ratio A/B ≥ 1.4 and A/D ≥ 2, where A is the web width, B is the arm separation distance, and D is the arm width. These parameter changes optimize the balance between flexibility for vibration isolation and structural strength for mechanical endurance
2Reliability
If the decoupling element is reinforced to prevent early deterioration, then the mechanical endurance is improved, but the natural frequency increases leading to increased noise
Solution Approach 1:
The H-shaped block geometry with specific ratios (A/B ≥ 1.4, A/D ≥ 2) is designed to achieve optimal stiffness characteristics. The web width A and arm dimensions are carefully proportioned to provide sufficient mechanical strength while maintaining low natural frequency, thus preventing noise generation
Solution Approach 2:
The decoupling element uses elastomeric material with specific hardness properties (Shore A 30-70) combined with the H-shaped geometric structure. This composite approach of material selection and structural design provides both mechanical endurance and low natural frequency characteristics
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
The proposed motor support effectively reinforces the decoupling element, preventing early deterioration and minimizing noise within the vehicle by maintaining a relatively low natural frequency.
Implementation Method 1
a decoupling means for decoupling the two coaxial rings and comprising a plurality of blocks which are made of an elastomeric material and are interposed between the inner ring and the outer ring
Implementation Method 2
blocks which are made of an elastomeric material and are interposed between the inner ring and the outer ring
Implementation Method 3
the blocks thus defined are able to reinforce the decoupling element to prevent early deterioration thereof, while at the same time maintaining a relatively low natural frequency making it possible to limit the noise in the interior of the vehicle
Data Source
AI summary
The motor support (16) comprises an inner ring (20) able to receive an element of the motor and an outer ring (22) able to be fastened to a housing, and a means (24) of decoupling between the two coaxial rings (20; 22) comprising a plurality of pads (46) of elastomer material that are interposed between the inner ring (20) and the outer ring (22). Each pad (46) is substantially “H”-shaped in form. The two arms (46int, 46ext; 461, 462) of the «H» are separated by a distance B. Each arm (46int, 46ext; 461, 462) has a width D measured in the radial direction. The web (46a) of the “H” has a width A measured in the orthoradial direction. The ratio A/B B is greater than or equal to 1.4, and the ratio A/D is greater than or equal to 2.