Cargo Bike Container Hinge Layout for Full Lid Opening
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Solution Overview
Problem
Existing cargo bike containers with lids face issues such as partial opening due to handlebars, self-closing in light breezes, and mechanical stress on hinges, making them difficult to open and close while maintaining stability and accessibility.
Innovation Solution
A cargo bike container design with hinge elements positioned between the lid and side walls, allowing a rotational and translational movement of the lid, enabling full opening without handlebar interference and reducing mechanical stress, with a spring and damping system for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lid element is connected via hinge elements to the side walls, then the lid can be opened, but the lid can only be partially opened due to handlebar interference
Solution Approach 1:
The patent transitions from a conventional side-hinging mechanism to a front-hinging mechanism, changing the dimension and direction of lid movement. The hinge elements are positioned on the front wall rather than the side walls, allowing the lid to pivot forward and upward in a different spatial plane that avoids handlebar interference while achieving full opening capability.
Solution Approach 2:
The patent introduces intermediate elements including a lifting element and a pivot element that mediate between the lid and the container. The lifting element first raises the lid vertically, then the pivot element allows rotational movement, creating a two-stage opening mechanism that navigates around the handlebar obstacle.
2Reliability
If the lid element is heavy, then it provides secure closure, but it can close on its own in light breezes and is difficult to open
Solution Approach 1:
The patent employs a spring element as a counterweight mechanism that offsets the weight of the heavy lid. The spring is positioned to provide upward lifting force that balances the lid's weight, allowing the lid to remain stable when closed but easy to lift when needed, preventing unwanted closing in breezes while maintaining secure closure.
Solution Approach 2:
The patent introduces a damping element that provides dynamic resistance to lid movement. This damping mechanism controls the lid's motion during opening and closing, allowing smooth operation despite the lid's heavy weight, and preventing sudden or uncontrolled closing while maintaining reliable sealing when closed.
3Ease of operation
If the lid element is positioned to the side when open, then it can be fully opened, but it requires additional space and causes instability
Solution Approach 1:
The patent changes the opening dimension from lateral (side) movement to forward-upward movement. The hinge elements on the front wall enable the lid to pivot in a different spatial direction, opening toward the front of the cargo bike rather than to the side, which maintains the bike's lateral stability while achieving full opening capability.
Solution Approach 2:
The patent designs the front wall with both hinge mounting functionality and structural support roles. The front wall serves as both the mounting surface for the hinge elements and a structural element that maintains cargo bike stability, eliminating the need for separate side space for lid placement while preserving structural integrity.
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
Ensures the lid can be fully opened and closed easily, maintaining stability and accessibility, reducing mechanical stress on hinges, and preventing interference with handlebars, while providing secure closure and minimal friction.
Implementation Method 1
a spring element is arranged between the two hinge levers
Implementation Method 2
a damping element is arranged between the two hinge levers
Data Source
Figure 1
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AI summary
A cargo bike container comprises a container element (52) and a lid element (54). The lid element (54) is pivotally connected to the container element (52) via two hinge elements (64). The hinge elements (64) are arranged at a distance from the rear wall (60) of the container element (52).