Steering Column Locking Assembly with Cam-Driven Clamping
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Solution Overview
Problem
Existing steering column adjustment mechanisms lack a reliable and efficient method to securely lock and unlock the telescoping or tilting positions, which can lead to instability and safety concerns during vehicle operation.
Innovation Solution
An adjustable steering column assembly with a locking assembly comprising a first member, a second member, and a third member, where the third member is movable between a lock and unlock position, applying a clamping load to inhibit or permit extension, retraction, tilting, or pivoting of the steering column, utilizing cam regions and a biasing member to facilitate secure locking and easy unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism with mini follower or toggling pins is used, then the steering column can be locked in adjusted positions, but the locking mechanism lacks reliability and may fail to securely maintain the locked position
Solution Approach 1:
The locking assembly is divided into three distinct members (first member, second member, and third member), each performing specific functions. The first and second members form a clamp structure, while the third member acts as a movable locking element with cam surfaces. This segmentation allows each component to be optimized for its specific function, improving overall locking reliability without requiring an overly complex integrated mechanism.
Solution Approach 2:
The third member incorporates cam regions with curved surfaces that interact with the first and second members. These cam surfaces convert rotational or linear motion of the third member into clamping force, providing smooth engagement and disengagement. The curved geometry ensures progressive loading and reliable locking while maintaining ease of operation.
2Stability of the object's composition
If a complex locking mechanism is used to ensure secure locking, then the steering column remains stable, but the adjustment mechanism becomes difficult to operate
Solution Approach 1:
The cam regions on the third member provide mechanical advantage through their curved geometry. As the third member moves between locked and unlocked positions, the cam surfaces progressively engage or disengage from the first and second members, converting small input motion into large clamping forces. This allows secure locking with minimal operator effort.
Solution Approach 2:
The third member is designed to be movable between locked and unlocked positions, transitioning the locking mechanism from a static to a dynamic system. This mobility allows the operator to easily switch between locked and unlocked states while maintaining stable locking when engaged. The dynamic nature of the third member enables smooth transitions without requiring excessive force.
3Reliability
If the locking mechanism uses multiple members with cam regions, then the locking becomes more secure, but the device complexity increases
Solution Approach 1:
The locking assembly is divided into three distinct members (first member, second member, and third member), each performing specific functions. The first and second members form a clamp structure, while the third member acts as a movable locking element with cam surfaces. This segmentation allows each component to be optimized for its specific function, improving overall locking reliability without requiring an overly complex integrated mechanism.
Solution Approach 2:
The first and second members are combined to form a clamp structure that works together with the third member. The cam regions on the third member simultaneously interact with both the first and second members, coordinating their motion to achieve secure locking. This merging of functions reduces the number of separate components needed while maintaining reliable locking performance.
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 provides a secure locking mechanism that prevents unintended movement of the steering column while allowing easy adjustment, enhancing safety and operational stability by ensuring the steering column remains locked in the desired position until intentionally unlocked.
Implementation Method 1
The third member first surface has a first cam region and a second cam region. The third member second surface has a third cam region and a fourth cam region.
Data Source
AI summary
An adjustable steering column assembly includes a locking assembly having a first member, a second member, and a third member. The first member has a first member first surface that defines a first recess and a second recess and has a first member second surface disposed opposite the first member first surface. The second member is disposed opposite the first member. The second member has a second member first surface that faces towards the first member first surface. The second member first surface defines a third recess and a fourth recess and has a second member second surface disposed opposite the second member first surface. The third member is disposed between the first member and the second member. The third member is movable relative to the first member and the second member between a lock position and an unlock position.