Retractable Vehicle Step With Spring Bias for Tailgate Clearance

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Solution Overview

Problem

Existing vehicles often lack a retractable stepping assist that can efficiently provide access to cargo beds while maintaining tailgate clearance.

Innovation Solution

A retractable vehicle step system that includes a stepping member, a step bracket, outer and inner arms, a mount, and a spring biasing mechanism, allowing the step to move between a retracted and extended position for enhanced access and clearance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a fixed position stepping assist is used to allow access to the cargo bed, then user access is facilitated, but tailgate clearance is compromised

Engineering Contradiction:
Improveaccess to cargo bedVSAvoidtailgate clearance
Core Design Contradiction:
Ease of operationVSLength of stationary object

Solution Approach 1:

The stepping assist is designed to be retractable rather than fixed, allowing it to move between an extended position (providing step assistance) and a retracted position (clearing the tailgate). The system includes arms that can pivot and a spring mechanism that enables automatic retraction, transforming a static obstruction into a dynamic solution that adapts to different operational states.

Inventive Principle:
Principle #15Dynamics

2Length of stationary object

If a retractable stepping assist is implemented, then tailgate clearance is maintained, but device complexity increases

Engineering Contradiction:
Improvetailgate clearanceVSAvoidstepping assist mechanism
Core Design Contradiction:
Length of stationary objectVSDevice complexity

Solution Approach 1:

The stepping assist incorporates a spring mechanism that automatically retracts the arms after deployment, eliminating the need for manual retraction or complex control systems. The spring-loaded design allows the system to service itself by returning to its retracted state, reducing operational complexity while maintaining the retractable functionality needed for tailgate clearance.

Inventive Principle:
Principle #25Self-service

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 system provides a reliable and efficient means of accessing cargo beds while maintaining tailgate clearance, enhancing user convenience and vehicle functionality.

Implementation Method 1

a spring having a first end and a second end, the first end of the spring engaging the spring coupler and the second end of the spring positioned around a protrusion extending from a portion of the mount, wherein the spring is positioned within said interior of the mount and is substantially aligned with a mounting plane of said mount that is configured to be positioned adjacent said portion of the vehicle, the spring configured to apply a biasing force to said inner arm via the spring coupler

Methodology Applied
Scientific EffectSpring: Spring

Data Source

PatentUS12202438B2Retractable vehicle step
Publication Date: 2025.01.21 LUND MOTION PRODS
  • US12202438B2 patent drawing
  • US12202438B2 patent drawing
  • US12202438B2 patent drawing

AI summary

A retractable vehicle step includes: a stepping member configured for movement between retracted and extended positions; a first arm having first and second ends, the first end coupled to the stepping member; a mount pivotally connected to the second end and configured to secure to a vehicle, the mount having a housing including an interior to receive a portion of the first arm, the housing having a height, a length, a first axis extending along the height, and a second axis extending along the length and perpendicular to the first axis; and a biasing member in the interior, the biasing member coupled with the second end of the first arm and configured to apply a biasing force to the first arm, the biasing force applied at a first angle with respect to said second axis that is less then approximately 30°.