Vehicle Seat Damper Bush Structure for Load Distribution
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Solution Overview
Problem
Conventional vehicle seat dampers are bulky, inefficient to produce, and prone to damage due to concentrated loads, leading to reduced vibration performance and increased manufacturing costs.
Innovation Solution
A damper design featuring a vibrating mass member with a guide bush made of rubber, allowing vertical and horizontal movement, and a mounting bracket with a movable guide bush to absorb impacts and distribute loads, preventing damage and improving vibration attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the weight of the vibrating mass member is increased to reduce vibrations in low frequency bands, then vibration attenuation performance is improved, but load concentration on the bush increases causing breakage and degradation of vibration performance
Solution Approach 1:
The bush is divided into multiple segments along its length, with each segment having different thickness. The thicker segments bear the primary load while thinner segments provide flexibility for vibration attenuation. This segmentation allows the bush to simultaneously support heavier vibrating mass members without breaking while maintaining vibration attenuation effectiveness.
2Reliability
If the thickness of the bush is reduced to reduce vibrations in specific frequency bands, then vibration attenuation is improved, but the bush becomes more prone to breakage under load
Solution Approach 1:
Different sections of the bush have different thicknesses tailored to their specific functional requirements. The section contacting the vibrating mass member has greater thickness to handle concentrated loads, while other sections have reduced thickness to provide flexibility for vibration isolation. This local quality variation optimizes both strength and vibration attenuation performance.
3Ease of manufacture
If conventional curing and painting processes are performed consecutively after integrating the vibrating mass member and bracket, then complete manufacturing is achieved, but manufacturing time and costs increase significantly
Solution Approach 1:
The curing and painting operations are merged into a single continuous process. The mold cavity is configured to allow paint application directly on the cured composite structure without removal or intermediate handling. This combining of operations eliminates the sequential bottleneck, reducing both manufacturing time and labor costs while maintaining product quality.
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 design effectively reduces vibrations transmitted to the vehicle seat by allowing the vibrating mass member to move freely within a specific frequency band, enhancing durability and productivity while minimizing manufacturing time and costs.
Implementation Method 1
bush made of rubber to be connected to a bracket mounted on the vehicle seat, where the vibrating mass member has a mounting for fixing the bush in a width direction provided on both sides of the bracket to enable the vibrating mass member to move vertically and horizontally in a specific frequency band by elasticity of the bush
Data Source
AI summary
A damper for a vehicle seat includes a vibrating mass member assembly including a vibrating mass member and a fixing member protruding from a side of the vibrating mass member, a guide bush accommodating the fixing member therein, coupled to each of the both sides of the vibrating mass member, and guiding the vibrating mass member to move in all directions, and a mounting bracket having an insertion hole into which the guide bush is inserted and fixedly formed on the vehicle seat. The damper may include an additional fixing member protruding from another side of the vibrating mass member, such that the fixing member and the additional fixing member protrude from both sides of the vibrating mass member.