Concealed Tailgate Step Linkage for Bed Access Assistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle tailgates lack integrated, aesthetically concealed steps that can be easily deployed and provide user assistance for accessing the vehicle bed, while maintaining a seamless exterior design.
Innovation Solution
A tailgate step system utilizing a four-bar linkage mechanism, including an actuation handle, drive links, and a step support link, which moves between a stowed and deployed position, hidden within the tailgate skin until needed, and extends to provide a step surface and assist device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a step is integrated into the tailgate, then user access to the vehicle bed is enhanced, but the aesthetic integrity of the tailgate exterior is compromised
Solution Approach 1:
The step assembly is nested within the tailgate structure, with the step surface and actuation handle concealed inside the tailgate skin when in the stowed position. The step assembly can be deployed outward when needed, providing access assistance while maintaining a clean, seamless exterior appearance during normal conditions.
2Shape
If the step is concealed within the tailgate skin, then aesthetic integrity is maintained, but ease of deployment and operation is reduced
Solution Approach 1:
The actuation handle is integrated with the step assembly and can be manually operated by the user to deploy the step. The mechanical linkage system automatically transitions the step from stowed to deployed position when the handle is actuated, eliminating the need for separate control mechanisms and simplifying user interaction.
3Ease of operation
If a four-bar linkage mechanism is used, then the step can be easily deployed and retracted, but the device complexity increases
Solution Approach 1:
The four-bar linkage mechanism serves multiple functions: it enables smooth deployment and retraction of the step, maintains the step in stable positioned (deployed and stowed), and allows the actuation handle to control the entire motion sequence. This single mechanism handles positioning, support, and actuation requirements.
4Ease of operation
If the actuation handle extends from the tailgate, then it provides ergonomic assistance, but it is visible and affects the tailgate appearance
Solution Approach 1:
The actuation handle is designed to be dynamic rather than static, extending from the tailgate only when needed for operation and retracting into the tailgate structure when not in use. This allows the handle to provide ergonomic assistance during deployment while maintaining a clean exterior appearance during normal conditions.
Data Source
AI summary
A tailgate step may include an actuation handle configured to be pivotably coupled to a vehicle tailgate. A tailgate step may include a drive link pivotably coupled to the actuation handle. A tailgate step may include a step support link pivotably coupled to the drive link and configured to support a step skin. A tailgate step may include a step surface coupled to and movable with the step support link between: a stowed position hiding the step surface and configured to align the step skin with a tailgate skin of the vehicle tailgate, and a deployed position with the actuation handle extending from the vehicle tailgate and configured as an assist device.