Dynamic Damper with Corner Checking for Vehicular Seat Assembly
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Solution Overview
Problem
Existing dynamic dampers for vehicular seats face challenges in ease of assembly, directional vibration control, and balance during fore-and-aft vibration due to the design of the weight and elastic member configuration, leading to suboptimal damping effects.
Innovation Solution
The dynamic damper incorporates corner part checking means, movement restriction mechanisms, and a specific weight configuration to enhance assembly ease, directional vibration control, and balance, utilizing a weight with a polygonal cross-section and elastic members with different materials and bending facilitation features to optimize damping performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire face of the weight is covered by the elastic member, then the weight can be fully protected and supported, but the corner part of the weight cannot be checked during assembly
Solution Approach 1:
The elastic member is designed with a local cutout at the corner portion, creating a localized inspection window. This allows the corner of the weight to be visually checked during assembly while the rest of the weight remains fully covered and protected by the elastic member, resolving the contradiction between full coverage and assembly checking.
2Reliability
If the weight is allowed to vibrate in all directions, then the dynamic damper can exhibit comprehensive damping function, but the weight unnecessarily moves in directions other than the desired specific direction
Solution Approach 1:
The elastic member is divided into multiple portions: a first elastic member covering the outer peripheral surface, and second and third elastic members covering specific portions of the weight. This segmentation allows the weight to be constrained in certain directions while maintaining vibration freedom in the desired damping direction, reducing unnecessary movement and energy loss.
3Ease of manufacture
If the damper case is disposed in a rearwardly-inclined attitude to follow the inclined pillar part, then the damper case can be properly mounted, but the weight cannot vibrate smoothly in the fore-and-aft direction due to gravitational bias
Solution Approach 1:
The elastic member configuration is made asymmetric relative to the inclined damper case, with specific elastic portions positioned to compensate for gravitational bias. This asymmetric arrangement counteracts the rearward biasing force, enabling the weight to vibrate smoothly in the fore-and-aft direction while maintaining proper mounting orientation.
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 improves the ease of assembly, allows for efficient directional damping, and enhances the damping effect in the desired direction while maintaining balance during fore-and-aft vibrations, resulting in improved vibration control and comfort.
Implementation Method 1
an elastic member supporting the weight so that the weight can vibrate
Implementation Method 2
dynamic damper that includes a weight and an elastic member supporting the weight so that the weight can vibrate
Data Source
AI summary
A dynamic damper is provided which includes a weight, an elastic member that supports the weight so as to allow vibration, and a damper case that houses the weight and the elastic member, wherein the dynamic damper also includes corner part checking means for checking at least some corner parts among corner parts where at least one end face of the weight and first and second side faces that are each continuous from the one end face and are adjacent to each other meet. This enables the ease of assembly to be enhanced by enabling a corner part of a weight to be checked when assembling the weight into a damper case, and also enables the state in which the elastic member is mounted on an end part of the weight to be easily checked.