On-center single-sided clamp mechanism for compact steering column
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Solution Overview
Problem
Traditional adjustable steering columns occupy additional space due to the positioning of the clamp mechanism and rake bolt, which can interfere with passenger movement and cabin packaging, as they are typically located away from the steering shaft.
Innovation Solution
An adjustable steering column with a mounting bracket, a lower jacket, and an upper jacket that are telescopically connected, featuring a rake bolt and clamping mechanism positioned on-center, allowing for compact design by intersecting the upper jacket, thus reducing space usage and improving packaging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clamp mechanism and rake bolt are positioned away from the steering shaft to allow complete extension across the rake bracket, then the clamp mechanism can function properly without interfering with shaft components, but additional space is occupied in the steering column assembly which interferes with passenger movement in the vehicle cabin
Solution Approach 1:
The patent positions the clamp mechanism asymmetrically on only one side of the steering column (single-sided clamping) rather than symmetrically across both sides. The rake bolt extends through the mounting bracket from one side only, with the clamp mechanism positioned at that same side. This asymmetric configuration reduces the overall space required while maintaining adequate clamping force on the steering shaft.
2Ease of manufacture
If the clamp mechanism is positioned along the bolt away from the center, then the bolt can extend completely across the rake bracket without interference, but packaging requirements restrict the location and additional space is used
Solution Approach 1:
The patent repositions the clamp mechanism from a traditional lateral position to an axial position along the steering column. The rake bolt extends axially through the mounting bracket, and the clamp mechanism is positioned at the axial end of the bolt rather than along its length. This dimensional repositioning allows the clamp to function effectively while minimizing the lateral space required in the steering column assembly.
Data Source
AI summary
An adjustable steering column for a vehicle is provided. The adjustable steering column includes a mounting bracket configured to be secured to an adjacent vehicle component, the mounting bracket having a first leg extending therefrom, a lower jacket having an axial opening extending along its length along a first axis, and an upper jacket extending along the first axis telescopically received in the axial opening of the lower jacket. A rake bolt extends along a second axis through the first leg from a first side to a second side of the first leg. The second axis intersects the upper jacket and at least a portion of the rake bolt is received within the lower jacket. A clamping mechanism is positioned on the rake bolt and is configured to apply a clamping force to the upper jacket to secure the upper jacket against telescope movement.