Side Lock Clamp Ramp Mechanism for Tonneau Cover Retention
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Solution Overview
Problem
Conventional tonneau cover clamp systems cause permanent deformation of pickup truck bed sidewall flanges due to excessive force, especially with newer truck designs featuring thinner or deformed flanges, leading to inadequate retention and structural integrity issues.
Innovation Solution
A tonneau cover system incorporating a side lock clamp mechanism with a ramp mechanism and cam lock member, featuring a first and second clamp member with ramp surfaces that allow lateral translation and a cam lock lever for secure engagement, minimizing deformation by distributing clamping force effectively across the flange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional clamp systems are used to secure the tonneau cover, then retention capability is improved, but permanent deformation of the truck bed flanges occurs
Solution Approach 1:
The ramp mechanism serves as an intermediary element between the clamp members and the flange. The ramp surfaces convert vertical clamping force into lateral translation, allowing the clamp to engage the flange in a controlled manner that prevents sudden excessive force application and permanent deformation while maintaining secure retention.
Solution Approach 2:
The cam lock mechanism changes the engagement parameter from a direct vertical clamp to a controlled lateral movement through the ramp. This parameter change allows the clamp to engage the flange gradually, transforming the force application mode to prevent deformation while achieving the required retention capability.
2Reliability
If sufficient clamping force is applied to secure the tonneau cover, then retention capability is improved, but the sidewall flange becomes permanently deformed
Solution Approach 1:
The ramp mechanism acts as a mediator that translates the clamping force into lateral translation rather than direct vertical compression on the flange. This intermediate action allows sufficient retention force to be applied while distributing the load in a way that prevents permanent deformation and preserves flange structural integrity.
Solution Approach 2:
The clamp system transitions from a static vertical clamp to a dynamic system where the ramp mechanism enables lateral movement during engagement. This dynamic engagement process allows the clamp to settle into position gradually, applying force in a controlled sequence that maintains both retention capability and flange integrity.
3Ease of manufacture
If newer truck bed designs with thinner flanges are used, then manufacturing flexibility is improved, but the flanges become susceptible to distortion under clamp load
Solution Approach 1:
The ramp mechanism serves as a protective intermediary between the clamp members and the thinner flanges of newer truck designs. By converting vertical force to lateral translation, the ramp prevents concentrated loads that would distort thin flanges, enabling the clamp system to work effectively with modern manufactured truck beds while preserving their structural stability.
4Reliability
If excessive force is exerted by the clamp, then retention capability is improved, but the flange material becomes distorted
Solution Approach 1:
The ramp surfaces act as a geometric intermediary that redirects the clamping force. Instead of applying excessive vertical force that would distort the flange geometry, the ramp mechanism converts this force into lateral translation, allowing the clamp to engage securely while maintaining the original flange shape and preventing material distortion.
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 secure retention of the tonneau cover without causing permanent deformation of the truck bed flanges, ensuring effective cargo protection and structural integrity across various truck bed designs.
Implementation Method 1
The ramp mechanism can include at least one ramp surface between the first and second clamp members shaped to cause lateral translation of the second clamping surface toward the first clamping surface in response to movement of the second clamp member toward the tonneau cover
Implementation Method 2
The cam lock member can be positioned to engage with the second clamp member and can include a lever for placing the cam lock member in a locked state or an unlocked state
Data Source
AI summary
A clamp to secure a tonneau cover to a frame of a cargo box includes a first clamp member coupled that has a first clamping surface. A second clamp member that has a second clamping surface. A ramp mechanism that causes lateral translation of the second clamping surface toward the first clamping surface, as the clamp moves between clamped and unclamped positions. A cam lock member positioned to engage with the second clamp member and includes a lever for placing the cam lock member in locked or unlocked states. When the cam lock member moves from the unlocked state to the locked state, the second clamp member moves toward the tonneau cover to the clamped position. When the cam lock member moves from the locked state to the unlocked state, the second clamp member moves away from the tonneau cover to the unclamped position.