Vehicle Pop-Up Hood Link Mechanism Offset Design
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Solution Overview
Problem
Existing vehicle pop-up hood devices face operation loss due to wrenching of the link mechanism's coupling locations, especially when the offset amount in the vehicle width direction becomes large, leading to major operation inefficiencies during actuation.
Innovation Solution
The vehicle pop-up hood device design includes a hinge base with a first arm and a second arm, both offset towards the vehicle width direction inner side, coupled through a link mechanism with specific offset and inclined configurations to minimize the vehicle width direction offset between link ends, ensuring stable operation and balanced movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the offset amount in the vehicle width direction becomes large due to design constraints, then the coupling locations of the link mechanism can be positioned to achieve design requirements, but wrenching of the coupling locations occurs during actuation, resulting in major operation loss
Solution Approach 1:
The patent introduces a vertical dimension offset between the first and second coupling locations of the link mechanism. By positioning these coupling locations at different heights (vertical positions) rather than only in the horizontal plane, the mechanism achieves the required horizontal offset while maintaining proper alignment during actuation, thereby preventing wrenching and operation loss.
2Ease of manufacture
If the first arm and second arm are offset toward the vehicle width direction inner side, then the link mechanism can be configured to meet design constraints, but the offset causes wrenching during actuation leading to operation loss
Solution Approach 1:
The patent resolves the horizontal offset issue by utilizing the vertical dimension. The first and second coupling locations are positioned at different vertical heights, which allows the arms to be offset in the horizontal direction while maintaining proper mechanical alignment during actuation, thus eliminating wrenching and operation loss.
3Reliability
If the coupling location of the hinge base to the first link is disposed further toward the vehicle width direction inner side than the coupling location of the hinge base to the first arm, then the link mechanism operates without wrenching, but the structure becomes more complex
Solution Approach 1:
The patent achieves operation stability by introducing a vertical offset between coupling locations rather than increasing horizontal offsets. This three-dimensional arrangement of coupling points allows the mechanism to function reliably while maintaining a relatively simple overall structure, as the complexity is managed through spatial arrangement rather than additional components.
Data Source
AI summary
A vehicle pop-up hood device includes: a hinge base; a first arm that has a rear end portion coupled to the hinge base, and that has a front portion disposed offset toward the vehicle width direction inner side with respect to the rear end portion; a second arm that is coupled to the front portion of the first arm so as to be capable of swinging, and that moves the hood toward a vehicle upper side; an actuator that spans between the first arm and the second arm, and that lifts the hood from a closed position to a lifted position; and a link mechanism that includes a first link and a second link. A coupling location of the hinge base to the first link is disposed further to the vehicle width direction inner side than a coupling location of the hinge base to the first arm.