Parking Brake Control Assembly Reliability
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Solution Overview
Problem
Existing vehicle parking brake systems lack reliability and efficiency in repeated actuations and resetting, requiring improved mechanisms for reliable engagement and disengagement.
Innovation Solution
A parking brake control assembly with a brake actuator, engagement member, retention member, release actuator, and biasing member that allows for reliable engagement and automatic disengagement, enabling repeated actuations and resetting by moving between defined positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple lever mechanism is used for parking brake actuation, then the device complexity is reduced, but the reliability of repeated actuations and resetting deteriorates
Solution Approach 1:
The control mechanism is divided into distinct functional components: a retention member with engagement features, a release actuator with cam mechanism, and a biasing member. Each segment performs a specific function in the actuation cycle, enabling reliable repeated operation while maintaining manageable complexity through modular design
Solution Approach 2:
The retention member is pre-configured with engagement features that automatically engage with the brake actuator during the actuation cycle. The biasing member is pre-loaded to provide automatic resetting force, eliminating the need for manual resetting and ensuring reliable repeated actuations
2Reliability
If the retention member remains engaged continuously, then the brake reliability is improved, but the ease of operation for release deteriorates
Solution Approach 1:
The release actuator serves as an intermediary mechanism between the user input and the retention member. By using a cam mechanism that converts rotational motion into linear displacement, it provides mechanical advantage to overcome the engagement force, making release easy while maintaining secure engagement during normal operation
Solution Approach 2:
The retention member transitions from a static engaged state to a dynamic disengaged state through the cam mechanism. The cam profile is designed to provide gradual disengagement, allowing the retention member to smoothly transition between states while maintaining reliability in the engaged position and ease of operation during release
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 ensures reliable and repeated actuation and resetting of the parking brake, maintaining the brake's engaged state until intentionally released, facilitating easy re-engagement for continued use.
Implementation Method 1
a biasing member coupled to the retention member and the release actuator to yieldably bias the retention member for rotation about the coupler
Data Source
AI summary
A parking brake control assembly having a brake actuator includes an engagement member, a retention member, a release actuator, and a biasing member. In a first position of brake actuator, the retention member is arranged to engage the engagement member upon movement of the brake actuator from a first position to a second position to hold the brake actuator in the second position. Movement of the brake actuator from the first to the second position causes the release actuator to move relative to the retention member such that the biasing member provides a force on the retention member tending to disengage the retention member from the engagement member so that upon movement of the brake actuator to return the brake actuator from the second position to the first position, the retention member disengages from the engagement member enabling the brake actuator to be returned to the first position.