Vehicle Case Structure Vibration Damping Pressing Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing case structures for accommodating boards in vehicles fail to effectively prevent vibration-induced abnormal noise due to gaps between the case and cover, which allows the board to vibrate when external vibrations are applied.
Innovation Solution
A case structure design that includes a pressing and holding portion, comprising a pressing member and a regulating member, which applies a force to the board to press it against the case and cover, preventing relative displacement and thus vibration, by sandwiching the board between guide members and the pressing member, and regulating upward displacement to maintain the board's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cover and case are fixed together, then the structural stability is improved, but gaps between the case and cover may still allow board vibration under external vibration
Solution Approach 1:
The pressing and holding portion is designed to pre-compress the board against the case before external vibration occurs. This preliminary compressive force ensures that when vibration is applied, the board remains firmly pressed against the case without developing gaps, thereby preventing vibration-induced noise while maintaining structural stability.
Solution Approach 2:
The pressing and holding portion applies a counteracting compressive force to the board that opposes the harmful vibrational forces. By pre-establishing this counter-force through elastic deformation of the pressing member, the system prevents the board from vibrating relative to the case and cover under external vibration conditions.
2Object-affected harmful factors
If a pressing and holding portion is added to compress the board, then board vibration is prevented, but device complexity increases
Solution Approach 1:
The pressing and holding portion is integrated into the existing case structure by forming the pressing member as an integral part of the case body. The guide members are also merged with the case structure, eliminating the need for separate mounting components and reducing overall device complexity while still providing the necessary compression and positioning functions.
Solution Approach 2:
The pressing member utilizes its own elastic deformation capability to generate the compressive force needed to hold the board. When the cover is installed, it automatically compresses the elastic pressing member, which in turn applies the holding force to the board. This self-service mechanism eliminates the need for additional actuators or complex force application systems.
3Reliability
If the pressing member is made elastic to provide continuous pressure, then the board is securely held, but manufacturing precision requirements increase
Solution Approach 1:
The pressing member is designed with specific elastic parameters (material properties, cross-sectional area, length) that determine its compressive force characteristics. By carefully selecting these parameters, the system achieves reliable board holding through elastic deformation without requiring extremely tight manufacturing tolerances for other components, as the elasticity provides a compliance buffer.
Solution Approach 2:
The elastic pressing member concentrates the compliance and force-generation capability at the specific location where board contact occurs. This localized elasticity allows the rest of the case and cover structures to be manufactured with standard precision tolerances, while the pressing member itself provides the necessary force variation accommodation through its elastic properties.
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 solution effectively prevents board vibration and subsequent abnormal noise generation by ensuring the board is securely held against both the case and cover, even under external vibration, thereby enhancing noise reduction in vehicle applications.
Implementation Method 1
a pressing and holding portion configured to press and hold a board against the case when the cover applies a force to the board
Data Source
AI summary
A case structure includes: a case having an opening at one end side; a cover configured to close the opening; and a pressing and holding portion configured to press and hold a board against the case when the cover applies a force to the board in a state where the board is accommodated in the case and the cover is closed.