Dumbbell Motor Isolator with Multi-Corner Elements for Vibration Damping
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Solution Overview
Problem
Existing motor isolators, such as spherical and cylindrical configurations, fail to effectively dampen vibrations and reduce noise in vehicle compartments due to wobbling and excessive elastic displacement, leading to durability issues and customer complaints.
Innovation Solution
The use of dumbbell-like isolators with two isolating elements connected by a bridge, featuring geometric shapes like cubes, cuboids, or rectangular prisms with multiple corners and projections, which provide improved surface contact and reduce wobbling, thereby effectively damping vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spherical or cylindrical isolators are used, then the isolator can be simple in shape and easy to manufacture, but the isolator experiences wobbling and excessive elastic displacement that reduces vibration damping effectiveness
Solution Approach 1:
The isolator is divided into two separate isolating elements connected by a bridge structure. Each isolating element can be a simple geometric shape (cube, cuboid, or rectangular prism) that is easy to manufacture, while the bridge connects them to eliminate wobbling and reduce excessive elastic displacement, thereby maintaining vibration damping effectiveness.
Solution Approach 2:
The isolator uses non-circular geometric shapes (cubes, cuboids, or rectangular prisms) with multiple corners instead of spherical or cylindrical shapes. This asymmetric geometry prevents wobbling during operation and reduces excessive elastic displacement, improving vibration damping effectiveness while remaining manufacturable.
2Device complexity
If traditional isolator shapes are used, then the design is simple, but the isolator transmits excessive noise and vibrations to the vehicle compartment
Solution Approach 1:
The isolator is segmented into two isolating elements connected by a bridge, creating a more complex structure that better isolates noise and vibrations. The multiple corners and projections on each element increase surface contact area, improving damping effectiveness and reducing harmful factor transmission to the vehicle compartment.
Solution Approach 2:
The isolating elements feature multiple corners and projections that extend in multiple dimensions, increasing the surface contact area with the motor housing. This multi-dimensional contact improves vibration damping and noise isolation effectiveness, reducing the transmission of harmful factors while maintaining a relatively simple overall structure.
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 isolator configuration eliminates wobbling and excessive noise, enhancing the damping of motor vibrations and reducing the transmission of noise and vibrations to the vehicle compartment, thus improving the durability and customer satisfaction of motor systems.
Implementation Method 1
The isolator includes two isolating elements connected by a bridge. At least one of the two isolating elements includes at least two corners in a cross-sectional view... The isolator damps vibrations passed from the motor body to the motor cover
Implementation Method 2
The isolator damps vibrations passed from the motor body to the motor cover... effectively damping vibrations and noise
Data Source
AI summary
A motor for driving a fan in a heating and/or cooling system includes a motor body, a motor cover, and an isolator. The isolator damps vibrations passed from the motor body to the motor cover. The isolator includes two isolating elements connected by a bridge. At least one of the two isolating elements includes at least two corners in a cross-sectional view.