Steering Column Cam Locking Assembly
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Solution Overview
Problem
Existing steering column assemblies lack an efficient and reliable locking mechanism for adjusting the steering column's position, which can lead to unintended movements during telescoping and rake adjustments, compromising driver comfort and safety.
Innovation Solution
A cam clamp mechanism with a first and second cam member, a lever, and a rolling element that moves between lock and unlock positions, applying tension or releasing it to inhibit or permit adjustments, ensuring secure positioning of the steering wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is implemented to maintain steering column position, then positioning reliability is improved, but device complexity increases
Solution Approach 1:
The locking mechanism is divided into separate functional components: a cam member with locking pattern, a lever with opening, and a rolling element. This segmentation allows each component to perform its specific function independently, improving reliability while keeping the overall design manageable in complexity
Solution Approach 2:
A rolling element is introduced as an intermediary between the cam member and lever. This rolling element facilitates smooth engagement and disengagement of the locking pattern, improving reliability of the locking mechanism while reducing the complexity of direct contact between larger components
2Ease of operation
If a cam clamp mechanism with rolling element is used, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The rolling element automatically engages with the locking pattern on the cam member when the lever is moved, without requiring additional actuators or complex control systems. This self-service mechanism improves ease of operation while minimizing the increase in device complexity
Solution Approach 2:
The rolling element utilizes curved or rounded surfaces to engage with the locking pattern, allowing smooth rolling motion rather than sliding. This curvature-based approach improves ease of operation by reducing friction and wear, while the compact nature of rolling elements keeps the overall device complexity low
3Adaptability or versatility
If locking pattern engagement is made selective, then adaptability is improved, but device complexity increases
Solution Approach 1:
The locking pattern on the cam member is designed to be selectively engageable through the lever's opening, allowing the system to transition between locked and unlocked states. This dynamic engagement capability provides adaptability for different steering column positions while maintaining relatively simple device complexity through the use of a single lever mechanism
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 mechanism provides a secure and adjustable locking system that prevents unintended movements, enhancing driver comfort and safety by allowing precise control over the steering column's position.
Implementation Method 1
The rolling element is received within the pocket and is configured to ride along the first locking pattern
Data Source
AI summary
A steering column assembly includes a jacket assembly connected to a support bracket and a locking assembly. The locking assembly has a first cam member, a second cam member, and a lever. The first cam member is connected to the support bracket and has a first locking pattern. The second cam member has a second cam member body that extends between a second cam member body first end and a second cam member body second end. The second cam member body second end defines a second locking pattern configured to selectively engage the first locking pattern. The lever is disposed about the second cam member body.