Steering Column Rake Slider Mechanism With Spindle Drive
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Solution Overview
Problem
Existing adjustable steering columns require costly and space-consuming linkages for rake adjustment, which are prone to undesirable movement and maintenance issues.
Innovation Solution
An electronically adjustable rake mechanism using a linear spindle drive with a motor, holder, and rake slider to accommodate curved or arcuate motion, reducing space requirements and manufacturing costs while eliminating lash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a linkage mechanism is used to translate curved motion for rake adjustment, then the steering column achieves adjustable rake, but the mechanism occupies excessive space and increases manufacturing cost
Solution Approach 1:
The patent replaces the traditional mechanical linkage system with an electronic motor-driven spindle mechanism. The motor (30) rotates the spindle (33) which directly drives the steering column rake adjustment, eliminating the need for complex linkages and significantly reducing the space required for the adjustment mechanism.
Solution Approach 2:
The patent changes the fundamental operating parameter from mechanical linkage geometry to motor rotation control. By using an electronically controlled motor to rotate the spindle, the system achieves rake adjustment through parameter change (rotation angle) rather than through mechanical linkage configuration, reducing spatial requirements.
2Adaptability or versatility
If a linkage mechanism is used for rake adjustment, then the steering column achieves adjustable rake, but manufacturing and maintenance costs increase
Solution Approach 1:
The patent substitutes the complex mechanical linkage system with a simpler motor-driven spindle mechanism. This electronic system requires fewer precision-machined linkage components, reducing manufacturing complexity and cost while improving ease of assembly and maintenance.
Solution Approach 2:
The patent extracts and removes the unnecessary linkage components from the traditional rake adjustment mechanism, retaining only the essential motor-driven spindle elements needed for adjustment, thereby simplifying the overall system and reducing manufacturing requirements.
3Adaptability or versatility
If a linkage mechanism is used for rake adjustment, then the steering column achieves adjustable rake, but lash and undesirable movement occur
Solution Approach 1:
The patent replaces the mechanical linkage system with a motor-driven spindle mechanism that provides direct, positive engagement for rake adjustment. The electronic motor control eliminates the play and lash inherent in mechanical linkages, providing more stable and precise movement control.
Solution Approach 2:
The motor-driven system provides self-adjusting capabilities through electronic control, automatically maintaining proper engagement and eliminating the need for manual adjustment or compensation for lash that would be required with mechanical linkages.
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
Enables efficient, cost-effective, and space-saving electronic control of steering wheel rake with reduced lash and improved reliability, suitable for various applications beyond steering columns.
Implementation Method 1
An electric motor 30 is operatively connected to a spindle 33. The spindle 33 is disposed so that rotation of the motor 30 will cause the spindle to be displaced in a vertical direction based on the direction of rotation of the motor.
Data Source
AI summary
A rake adjustment mechanism for an electronically adjustable steering col disclosed.