Automated Running Board with Adjustable Lead Screw Linkage
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Solution Overview
Problem
Automated power running boards typically have only two positions, which can be inadequate for individuals who are taller or shorter than average, leading to ergonomic compromises during vehicle ingress and egress.
Innovation Solution
An adjustable position automated running board with a linkage system and electronic control allows for infinitely variable positioning between stowed and deployed states, enabling customizable step heights through programmable electronic control, such as via a key fob or instrument panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If automated power running boards have only two positions (stow and deployed), then the device complexity is reduced and manufacturing is simplified, but the adaptability for users of varying heights deteriorates
Solution Approach 1:
The running board transitions from a static two-position system to a dynamic continuously adjustable system. The lead screw mechanism with motorized actuation enables the running board to be positioned at any height between the stowed and deployed positions, allowing users to select optimal step heights based on their individual height requirements. This dynamic adjustment capability directly resolves the contradiction by providing adaptability for users of varying heights while maintaining a relatively simple mechanical structure.
Solution Approach 2:
The invention changes the positional parameter of the running board from discrete (two fixed positions) to continuous (infinitely adjustable positions). By implementing a lead screw mechanism with electronic control, the system allows the running board height to be varied continuously within a predetermined range, enabling customization for different user heights. This parameter change approach provides adaptability without significantly increasing device complexity.
2Adaptability or versatility
If the running board is made infinitely positionable with electronic control, then the adaptability for different users is improved, but the device complexity increases
Solution Approach 1:
The invention replaces complex mechanical positioning systems with a motorized lead screw mechanism controlled by an electronic control module. Instead of using multiple fixed-position mechanical linkages or complex cam systems, the patent employs a simplified motor-driven lead screw that can be electronically controlled to achieve infinite positional adjustment. This substitution reduces overall device complexity while maintaining the infinitely positionable capability.
Solution Approach 2:
The electronic control system enables the running board to automatically position itself at the desired height based on user input or pre-programmed settings. The system can be controlled via key fob or instrument panel selection, and the motorized actuation automatically adjusts the running board position without requiring manual intervention. This self-service capability achieves infinite positionability while keeping the control interface simple for the user.
3Ease of operation
If the running board uses an adjustable lead screw linkage for infinite positioning, then the ergonomic comfort is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The invention changes the manufacturing approach from requiring high-precision mechanical tolerances for fixed-position linkages to allowing greater tolerance in the lead screw mechanism. The electronic control system compensates for manufacturing variations by programmatically adjusting the motor actuation to achieve the desired position. This allows infinitely adjustable positioning for ergonomic comfort while reducing the stringency of manufacturing precision requirements compared to precision-machined fixed-position systems.
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
Provides safe and effortless vehicle access for users of varying heights by allowing customizable step heights, enhancing ergonomic comfort and maintaining mechanical efficiency with self-locking mechanisms and reduced noise, vibration, and harshness.
Implementation Method 1
An adjustable lead screw linkage is provided, which allows adjustable stop points between the stowed and the deployed positions
Data Source
AI summary
An adjustable position automated running board step for a vehicle. A step member is attached to a linkage. The linkage is operable for moving the step from a deployed to a stowed position. An adjustable lead screw linkage is provided, which allows adjustable stop points between the stowed and the deployed positions. A typical stow position stows the step in a suitable position at the rocker interface and also provides a more easily tunable lowest position. The invention includes a method whereby the step can be infinitely positioned in a predetermined range between the lowest step position and the stow position by means of electronic control. The electronic control of the “mid variable position” could be programmable by either the customer or the manufacturer. For example, there exists the opportunity to have a “his and hers” selection by a number of methods such a key fob or instrument panel selection.