Vibration Body Unit With Nested Elastic Cylinders
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Solution Overview
Problem
Existing vibration body support structures fail to stably absorb vibrations effectively, leading to noise transmission and durability issues in vehicle-mounted components like electrically driven water pumps.
Innovation Solution
A vibration body unit comprising an inner elastically deformable cylinder, an outer cylinder with an attachment section, and strategically arranged first and second spacers that face each other radially across the inner cylinder, reducing direct contact areas and allowing for improved load distribution and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixation member surrounds the vibration body with elastic protrusion parts, then vibration absorption performance is improved, but the stability of supporting the vibration body deteriorates
Solution Approach 1:
The support structure is divided into multiple discrete elastic protrusion parts arranged circumferentially around the vibration body. Each protrusion part independently absorbs vibration while the collective arrangement maintains stability. The spacers are also segmented and positioned at specific intervals to provide distributed support points.
Solution Approach 2:
Different regions of the support structure have different properties: the elastic protrusion parts provide vibration absorption, while the spacer regions provide structural stability and positioning. The inner and outer cylinders have different thicknesses and material properties optimized for their specific functions - the inner cylinder for vibration isolation and the outer cylinder for structural support.
2Object-generated harmful factors
If elastic protrusion parts are used to absorb vibration, then noise occurrence is prevented, but further improvement in vibration absorption performance is limited
Solution Approach 1:
The support structure uses a nested cylindrical configuration with an inner cylinder surrounding the vibration body and an outer cylinder surrounding the inner cylinder. The elastic protrusion parts are positioned between these nested cylinders, creating multiple layers of vibration absorption and isolation.
Solution Approach 2:
The inner and outer cylinders act as intermediary elements between the vibration body and the fixation member. These cylindrical intermediaries distribute and attenuate vibration forces before they reach the fixation member, enhancing the overall vibration absorption performance beyond what elastic protrusion parts alone can achieve.
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 configuration effectively reduces vibration transmission, enhances durability at attachment points, and simplifies manufacturing and assembly while maintaining long-term stability and cost-effectiveness.
Implementation Method 1
an inner cylinder that surrounds a circumference of the vibration body and that is elastically deformable
Data Source
AI summary
A vibration body unit includes: a vibration body; an inner cylinder that surrounds a circumference of the vibration body and that is elastically deformable; an outer cylinder that surrounds a circumference of the inner cylinder and that has an attachment section which is attached to a base part; a plurality of first spacers that are interposed between the vibration body and the inner cylinder and that are arranged to be spaced in a circumferential direction; and a plurality of second spacers that are interposed between the inner cylinder and the outer cylinder and that are arranged to be spaced in a circumferential direction, wherein the plurality of first spacers and the plurality of second spacers are arranged such that at least part of each of the plurality of first spacers faces each of the plurality of second spacers in a radial direction across the inner cylinder.