Vehicle Pop-Up Hood Lock Device Anti-Tilt Mechanism
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Solution Overview
Problem
Existing vehicle pop-up hood devices face issues with the front hood tilting when contacted by pedestrians, leading to increased weight and component count when attempting to address this problem through additional lock devices or link mechanisms.
Innovation Solution
A vehicle pop-up hood device featuring a pair of front hood lifting devices and a single hood lock device with an anchoring portion, a lock portion, and a fixing device that releases the hood lock device during actuation, preventing tilting while minimizing weight and component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a single hood lock device is used, then the weight and number of components are reduced, but the front hood may tilt when contacted by pedestrians
Solution Approach 1:
The hood locking system is divided into two functional parts: a single hood lock device for weight reduction and a pair of lifting devices positioned at separated locations for stability. This segmentation allows each component to specialize in one function while working together to achieve both weight reduction and anti-tilting stability.
Solution Approach 2:
The hood lock device serves as an intermediary component that coordinates between the lifting devices and the hood striker. It receives actuation signals from the lifting devices and translates them into coordinated movement of the hood, enabling the single lock device to control the stable movement of the entire hood assembly.
2Stability of the object's composition
If a pair of hood lock devices or link mechanisms are provided at separation in vehicle width direction, then tilting is suppressed, but the weight and number of components increase
Solution Approach 1:
The patent merges the functions of multiple hood lock devices into a single integrated hood lock device that cooperates with separately positioned lifting devices. This combining approach maintains the stability benefits of distributed components while consolidating the locking function into one unit, reducing overall component count.
Solution Approach 2:
The single hood lock device is designed with multi-functionality to perform both locking and coordinated lifting control. It integrates the anchoring portion for securing the hood striker and the lock portion for controlled release, enabling one component to replace what would traditionally require multiple specialized devices.
3Manufacturing precision
If the hood lock device is fixed rigidly, then positioning accuracy is improved, but the ability to move with the hood during pop-up is reduced
Solution Approach 1:
The hood lock device employs a dynamic mounting structure that transitions between fixed and movable states. During normal operation, it maintains a fixed position for accuracy, but during pop-up actuation, it becomes movable to follow the hood's motion trajectory, achieving both precision and adaptability through state transformation.
Data Source
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AI summary
A vehicle pop-up hood device (10) includes a pair of actuators (16) that move a front hood (12) from a closed position to a lifted position, and a single hood lock device that is disposed at a vehicle width direction intermediate portion between the pair of actuators (16), that includes an anchor recess (28) to which a hood striker (22) is anchored, and a latch (32), and that is configured so as to be capable of moving from the closed position to the lifted position together with the front hood (12). The vehicle pop-up hood device (10) further includes a fixing device (18) that fixes the hood lock device (14) in the closed position; and a fixing release device (20) that releases the fixing of the hood lock device (14) by the fixing device (18) in conjunction with actuation of the actuators (16).