Vehicle Pedal Linkage for Collision Release and Step Retraction
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Solution Overview
Problem
Existing vehicular operation pedal devices face reduced design flexibility due to the need to balance loads during both stepping operations and vehicle collisions, necessitating specific design considerations for the rotation shaft position and lever shapes.
Innovation Solution
A vehicular operation pedal device with a support member, operation pedal mechanism, rotation lever, and differential lever system that allows independent design of load paths for stepping and collision scenarios, using a fixing member to release the differential lever and rotation lever fixation upon collision, enabling independent design of lever shapes and shaft positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the load for releasing fixation during collision is made greater than the load during normal stepping operation, then the fixation is reliably maintained during normal operation, but the design flexibility of rotation shaft position and lever shape is reduced
Solution Approach 1:
The patent divides the load path into two separate segments: one for normal operation loads and another for collision loads. The differential lever creates distinct contact portions (first contact portion for normal operation, second contact portion for collision) that transmit loads through different paths to the fixing member, allowing independent optimization of each load condition without compromising design flexibility
Solution Approach 2:
The differential lever acts as an intermediary mechanism between the operation lever and the support member. It mediates the transmission of forces by providing different contact portions that interface with different parts of the system under different conditions, enabling the system to handle both normal operation and collision loads independently
Data Source
AI summary
When a dash panel P is displaced toward the rear of a vehicle upon vehicle collision, a small collision lever 60 is displaced to a release position at which a load corresponding to contact of a collision bracket 200 with a second contact portion 60A is applied to a swaging pin 15. When fixation between a rotation lever 50 and a second arm 40 via the small collision lever 60 by the swaging pin 15 is released, a step portion 21 is displaced to the vehicle front side.