Bumper-Integrated Step Pad Deployment for Pickup Cargo Bed Access
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Solution Overview
Problem
Accessing vehicle cargo spaces, particularly in pickup trucks, can be challenging due to the height of the cargo bed, as existing solutions do not provide an efficient and convenient means to step up, especially when the tailgate is open.
Innovation Solution
A deployable step system integrated into the vehicle's bumper, which moves from a stowed position to a deployed position, positioning a step pad rearward and vertically lower than the bumper, assisted by a control module that commands the system to deploy when the tailgate door is opened, and optionally lowers the vehicle height using air suspension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cargo bed height is maintained for load capacity and vehicle structure, then cargo space volume is preserved, but accessibility to the cargo bed deteriorates
Solution Approach 1:
The step system transitions from a static integrated bumper design to a dynamic deployable structure. The step pad can be deployed downward and rearward when the tailgate is opened, providing a temporary accessible surface, and then retracts into the bumper when not in use. This dynamic transformation allows the system to adapt between providing cargo space volume and facilitating accessibility.
Solution Approach 2:
The step system is divided into separable components: the step pad, deployment mechanism, and integration with the bumper. This segmentation allows the step function to be independently deployed only when needed (when tailgate is open), rather than requiring a permanently modified bumper structure, thus preserving cargo volume while enabling accessibility on demand.
2Ease of operation
If a deployable step system is added to improve accessibility, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The step system is merged with the existing bumper structure and tailgate assembly. The step pad integrates into the bumper's cross-tubes, and the deployment is triggered by the tailgate door switch. This merging leverages existing vehicle components and control systems, reducing the need for separate complex systems while still providing the deployable step functionality.
Solution Approach 2:
The step system automatically deploys and retracts based on tailgate position detection. When the tailgate is opened, the control module activates the deployment motor to extend the step; when closed, it retracts. This self-service operation eliminates the need for manual deployment mechanisms or additional user intervention, simplifying the user interface while maintaining automated functionality.
3Ease of operation
If the step pad is positioned rearward and vertically lower than the bumper when deployed, then accessibility is improved, but the step system requires more complex deployment mechanics
Solution Approach 1:
The step pad deployment utilizes two-dimensional movement: rearward extension along the horizontal axis and vertical lowering along the vertical axis. This is achieved through a telescoping mechanism for horizontal movement and a pivoting mechanism for vertical movement. By employing multi-dimensional movement, the step reaches optimal accessibility positions without requiring overly complex single-axis mechanisms.
Data Source
AI summary
Deployable step systems for accessing vehicle cargo spaces on vehicles equipped with a tailgate assembly having a door subassembly may include a bumper integrated step pad that is movable between a stowed position and a deployed position. In the stowed position, the step pad establishes a portion of the bumper, and in the deployed position, the step pad is rearward and vertically lowered relative to the bumper.