Cargo Bicycle Canopy Reinforced by Rear Safety Cage
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Solution Overview
Problem
Existing cargo bicycles with canopies face issues of increased air resistance, instability, and lack of stability and sturdiness due to semi-closed or closed coverings, which also fail to provide complete protection from weather elements and are inconvenient for users.
Innovation Solution
A canopy for cargo bicycles with integrated side fastening elements and a rear safety cage, which is reinforced by a rear safety cage and features a frame structure with spring force arched members and diagonal arched ceiling members, allowing for adjustable side openings and a sturdy, aerodynamic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a semi-closed or closed canopy covering is added to a cargo bicycle, then protection from weather elements is improved, but air resistance increases and power consumption increases
Solution Approach 1:
The canopy is designed with detachable and adjustable side panels that can be configured in different positions (open, closed, partially closed) depending on weather conditions and speed requirements. This dynamic adjustability allows users to optimize between protection and aer efficiency for different operating conditions
Solution Approach 2:
The canopy structure is divided into separate modular components including the main roof section, side panels, and attachment mechanisms. This segmentation allows selective deployment of protective elements and reduces overall drag compared to a fully enclosed structure
2Object-affected harmful factors
If a semi-closed or closed canopy covering is added to a cargo bicycle, then protection from weather elements is improved, but stability and sturdiness deteriorate due to wobbling
Solution Approach 1:
The canopy is integrated with the rear safety cage structure, combining the protective covering with the existing structural framework. This merging provides mutual reinforcement where the cage supports the canopy and the canopy stabilizes the cage structure
Solution Approach 2:
The canopy employs curved and arched structural elements rather than straight rigid beams. These curved members provide inherent structural strength and flexibility to resist wobbling while maintaining stability during bicycle operation
3Strength
If a closed canopy with hard materials and multiple poles is used, then structural strength is improved, but weight increases
Solution Approach 1:
The canopy utilizes a flexible fabric or thin shell material stretched over a minimal frame structure instead of solid hard materials. This provides sufficient structural strength for protection while dramatically reducing weight compared to rigid enclosures
Solution Approach 2:
The design extracts only the essential structural elements needed for strength (minimal poles and attachment points) rather than using comprehensive rigid framing. This selective extraction maintains necessary strength while minimizing weight
4Ease of manufacture
If separate mounted clamps and bracket attachment means are used, then ease of installation is improved, but stability and sturdiness deteriorate due to lack of crosswise tension
Solution Approach 1:
The attachment system merges multiple separate mounting points into an integrated attachment mechanism that distributes loads across multiple locations simultaneously. This provides both ease of installation and stable crosswise tension through a unified attachment process
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 canopy provides a stable and sturdy interior space for accommodating individuals, offering protection from weather elements while minimizing air resistance and maintaining stability during movement, with adjustable openings for varying environmental conditions.
Implementation Method 1
frame structure with spring force arched members
Implementation Method 2
spring force arched cross member
Implementation Method 3
diagonal arched ceiling members
Implementation Method 4
reinforced by a rear safety cage
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A canopy for cargo bicycles, forming an upper interior space (7) for accommodating individuals (70), designed such that it can be reinforced by a rear safety cage (52) of a cargo bicycle (50), comprising wall elements (4, 5, 6A, 6B), forming the upper interior space (7) and a frame structure (452, 552, 352E, 352F), framing the upper interior space (7), is provided. Side elements (60A, 60B) and detachable side fastening elements (65a/65d, 65b/65c) are provided to modify openings of the upper interior space (7) between furled and unfurled states. Front vented openings (40) and front vented opening covers (45) are provided to modify openings of the upper interior space (7) between vented furled and vented unfurled states. The frame structure comprises a front spring force arched cross member (452) and a rear spring force arched cross member (552), at least partially reinforced by the rear safety cage (52), and two diagonal arched ceiling members (352E, 352F), forming four approximately central wedge-like aerodynamic shape. The bending stiffness of the front and/or rear spring force arched members (452, 552) is/are greater than the bending stiffness of the two diagonal arched ceiling members (352E, 352F).