Brake Pedal Rotating Member With Load-Released Collision Retraction
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Solution Overview
Problem
Existing vehicular operation pedal devices require a large number of parts to prevent the backward movement of the step portion during a vehicle collision, which complicates the mechanism.
Innovation Solution
A vehicular operation pedal device with a reduced number of parts, featuring a support member, a rotating member with a bent portion, a connecting portion, and a fixing member that uses a caulking pin or bolt to secure the operation pedal mechanism, allowing the upper end of the rotating member to contact a second vehicle component during a collision and release fixation when a specific load is applied, enabling the step portion to move forward and prevent backward movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixing mechanism with multiple parts (rotating arm, connecting arm, push rod, etc.) is used to prevent backward movement of the operation pedal during vehicle collision, then the reliability of preventing backward movement is improved, but the device complexity and number of parts increase
Solution Approach 1:
The patent combines the rotating arm, connecting arm, and push rod into a single integrated rotating member. This rotating member has a bent portion that rotates about a rotating shaft, with a front end portion that contacts the dash panel and an upper end portion that connects to the operation pedal. This merging of multiple components into one reduces part count while maintaining the collision prevention function.
Solution Approach 2:
The rotating member serves multiple functions: it acts as both the rotating arm that contacts the dash panel during collision and the connecting mechanism that transmits force to the operation pedal. The single component performs what previously required multiple separate parts, simplifying the overall structure while ensuring reliable backward movement prevention.
2Reliability
If a fixing mechanism with multiple parts is used to suppress backward movement of the operation pedal during collision, then the effectiveness of collision protection is improved, but the ease of manufacture decreases due to increased assembly complexity
Solution Approach 1:
By integrating the rotating arm, connecting arm, and push rod into a single rotating member, the patent reduces the number of assembly steps required during manufacturing. The single component can be produced as one piece or pre-assembled unit, simplifying the assembly process compared to installing multiple separate components.
Solution Approach 2:
The rotating member is designed with distinct functional portions (bent portion for rotation, front end portion for dash panel contact, upper end portion for pedal connection) that are integrated into a single component. This segmentation of functions within one part maintains manufacturing simplicity while ensuring each function is properly fulfilled.
Data Source
AI summary
A brake pedal device includes: a pedal bracket fixed to a dash panel; an operation pedal mechanism having a step portion rotatable with respect to the pedal bracket and in which the step portion is stepped forward of a vehicle; a rotating member having a bent portion, a front end portion, and an upper end portion, and rotatably supported with respect to the operation pedal mechanism by a rotating shaft portion at the bent portion; a connecting pin and a clevis that rotatably hold a tip portion of an operating rod projecting rearward of the vehicle from the dash panel with respect to the rotating member, at the front end portion of the rotating member; and a caulking pin that fixes the rotating member and the operation pedal mechanism, at the bent portion of the rotating member.