Overslam Bumper Buckled Surface Uniform Repulsive Force
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Solution Overview
Problem
Conventional over-slam bumpers for vehicles face issues such as inadequate shock absorption, uneven repulsive force, difficulty in adjusting the bumper height, and potential damage to the groove part and increased risk of door intrusion, leading to inefficiencies and safety concerns.
Innovation Solution
The over-slam bumper features a buckled outer peripheral surface for uniform repulsive power, a cylindrical buckling part with a ring-shaped structure for shock absorption, a compression part for consistent force distribution, and a height adjustment mechanism with graduation markings for precise positioning, along with a stress buffer and elastic air compression to manage shock and noise effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the outer peripheral surface of the damping part is made buckled to show uniform repulsive power, then the repulsive power uniformity is improved, but the device complexity increases
Solution Approach 1:
The outer peripheral surface of the damping part is designed with a buckled asymmetric profile instead of a smooth symmetric shape. This buckled structure creates varying local geometries that distribute repulsive force more uniformly across the contact surface when the door closes, transforming the asymmetric buckled form into symmetric force distribution functionality.
Solution Approach 2:
The buckled structure introduces curved surfaces and rounded transitions in the damping part's outer peripheral surface. These curved geometries help distribute contact pressure more evenly during door closure, preventing stress concentration at sharp edges and achieving uniform repulsive power through smooth transitional surfaces.
2Strength
If the protrusion height of the over-slam bumper is adjusted to be excessive, then the shock absorption capability is improved, but excessive reaction force is generated when the door is closed
Solution Approach 1:
The protrusion height of the over-slam bumper is optimized to a specific range rather than maximized. By controlling the protrusion height parameter within appropriate limits, the bumper achieves sufficient shock absorption capability while preventing excessive reaction force generation during door closure, balancing two opposing performance requirements through parameter optimization.
3Strength
If the repulsive power increases in proportion to the section, then the shock absorption is improved, but the groove part with which the over-slam bumper gets in contact is damaged
Solution Approach 1:
The damping part features a buckled structure with locally varied geometry along its outer peripheral surface. Different sections of the buckled profile have different local properties - some areas provide higher repulsive power while others provide lower repulsive power. This local variation in structural quality distributes the contact stress more evenly across the groove part, preventing damage at any single location while maintaining overall shock absorption capability.
4Device complexity
If the worker adjusts the protrusion height without indication parts, then the adjustment process is simple, but work efficiency is deteriorated due to repeated adjustment of the interval
Solution Approach 1:
Indication parts are provided on the over-slam bumper to visually indicate the protrusion height or adjustment position. These indication parts may use color coding, markings, or visual contrasts to show the current adjustment state, allowing workers to quickly identify the correct position without repeated trial-and-adjustment cycles, thereby improving work efficiency through visual information.
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 enhances durability, reduces noise, ensures uniform repulsive power, simplifies height adjustment, and improves work efficiency by providing consistent quality without additional adjustment processes, while preventing damage and ensuring passenger safety.
Implementation Method 1
a buckling part (111) for absorbing shock by buckling when shock is applied to the bumper head part (120)
Implementation Method 2
a compression part for absorbing shock by compression
Implementation Method 3
an elastic air compression part (270) for absorbing shock by compressing the inside air
Data Source
AI summary
Disclosed herein is an over-slam bumper for a vehicle. The over-slam bumper includes: a bumper unit (100) of which an end portion protrudes toward a door to absorb shock generated between a vehicle body and the door; and a mounting unit (200) coupled with the bumper unit (100) to fix the bumper unit to the vehicle body, wherein the bumper unit (100) includes: an elastic part for absorbing shock generated when getting in contact with the door; and a coupling part (116) connected to the elastic part and coupled with the mounting unit (200). The elastic part includes a buckling part (111) for absorbing shock by buckling; a compression part (130) for absorbing shock by compression; and an elastic air compression part for absorbing shock by sealing the inside air to compress inside air.