Tailgate Integrated Step Handle Mechanism
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Solution Overview
Problem
Existing vehicle step systems for accessing cargo areas are often cumbersome, poorly located, cause NVH issues, and interfere with the opening and closing of tailgates due to loose cargo and debris, while occupying valuable cargo space.
Innovation Solution
A deployable step assembly integrated into the tailgate, where a ladder is stowed within the tailgate and can be extended downwardly, featuring a handle for securing and deploying the ladder, a rail guide system for smooth extension, and a spoiler design that provides additional support and reduces debris interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If steps or ladders are carried separately to access cargo area, then access to cargo area is enabled, but cargo space is reduced
Solution Approach 1:
The step system is merged with the tailgate structure, integrating the ladder and steps into the tailgate itself. This eliminates the need for separate step carriers while maintaining access functionality, thereby preserving cargo space.
Solution Approach 2:
The ladder and steps are nested within the tailgate structure when not in use. The step assembly can be stowed inside the tailgate body, allowing easy deployment when needed while occupying minimal space during normal cargo operations.
2Ease of operation
If step systems are added to vehicles, then access to cargo area is improved, but device complexity increases
Solution Approach 1:
The tailgate structure serves multiple functions: it acts as both the closure for the cargo area and as the housing for the step system. The handle mechanism also serves dual purposes for both tailgate operation and step deployment, reducing overall system complexity.
Solution Approach 2:
The step system is designed to be self-deploying through the existing tailgate handle mechanism. When the handle is pulled to open the tailgate, it automatically triggers the step deployment without requiring separate controls or complex actuation systems.
3Ease of operation
If step systems are installed on vehicles, then cargo area access is facilitated, but NVH concerns increase
Solution Approach 1:
By integrating the step system into the tailgate structure rather than mounting it separately, the patent eliminates rattles and NVH issues associated with loose-mounted components. The unified structure ensures all parts are securely attached and positioned.
4Ease of operation
If step systems are installed on tailgates, then cargo area access is improved, but reliability decreases due to debris interference
Solution Approach 1:
The step deployment mechanism is extracted from the potential debris zones near the tailgate hinge and locking mechanisms. By positioning the steps and their actuation mechanisms in protected areas of the tailgate structure, the patent prevents debris and loose cargo from interfering with step operation.
Data Source
AI summary
A deployable step and handle system for a tailgate. The handle is used to secure the deployable step in the stowed position that eliminates the need for a separate release system. The handle is placed adjacent a top edge of the tailgate to prevent debris from being trapped under the handle when the handle is closed. The ladder has a step surface disposed opposite and at an angle relative to a top surface of a spoiler that provides a step surface. The ladder rails are guided by rail guides as the ladder is moved between a stowed position and a deployed position. A unitary support bracket is used to connect both the handle and a ladder rail to the tailgate.