Convertible Bicycle Frame Hinge Mechanism for Stroller Mode Stability
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Solution Overview
Problem
Bicycles are vertically stable but laterally unstable, making them unsuitable for carrying children or goods without a rider, as they cannot maintain balance when stationary, leading to issues of theft and inconvenience when needing to carry items to destinations where cycling is not feasible.
Innovation Solution
A convertible bicycle design that transforms into a stroller mode, featuring a carrier portion mounted on a bicycle portion with a hinge mechanism, allowing the rear wheel to fold forward and an auxiliary wheel to support the carrier, enabling three-point contact for stability, and locking mechanisms for secure conversion between modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a bicycle is designed with only two wheels for efficient cycling, then cycling speed and efficiency are improved, but lateral stability deteriorates making it unsuitable for unattended carrying of children or goods
Solution Approach 1:
The bicycle frame is designed with a hinge mechanism that allows dynamic reconfiguration between bicycle mode (two wheels for efficient cycling) and stroller mode (three-point contact for stability). The rear portion can pivot relative to the front portion, enabling the same structure to adapt its stability characteristics based on operational requirements.
Solution Approach 2:
The bicycle frame is divided into separable front and rear portions that can be repositioned relative to each other. The carrier is also separable and can be mounted in different configurations, allowing the system to be segmented and reconfigured for different operational modes.
2Adaptability or versatility
If a bicycle is used to carry children or goods to a destination where cycling is not feasible, then the ability to transport children and goods is improved, but the bicycle becomes an impediment that must be locked or walked about
Solution Approach 1:
The convertible frame allows the user to dynamically switch from bicycle mode for efficient transport to stroller mode for navigation in areas where cycling is not feasible. This dynamic reconfiguration eliminates the need to leave the bicycle unattended or walk it about, as the same device can perform both functions.
Solution Approach 2:
The bicycle is designed to perform multiple functions: it can operate as a bicycle for efficient cycling and as a stroller for areas where cycling is not feasible. The carrier can accommodate both children and goods, making the device universally applicable for various transport needs.
3Ease of operation
If a bicycle is left unattended at a destination, then the user can enter premises freely, but the risk of theft increases and the user loses means of carrying children or goods
Solution Approach 1:
The convertible design allows the user to maintain continuous control over the transport device by converting it to stroller mode and walking it into premises. This eliminates the need to leave the bicycle unattended, thereby maintaining security against theft while still providing access to premises where cycling is not feasible.
4Quantity of substance
If a carrier is mounted on a bicycle for carrying children or goods, then the carrying capacity is improved, but the device becomes unusable without a rider maintaining balance
Solution Approach 1:
The carrier is mounted on a convertible frame that can be reconfigured from bicycle mode to stroller mode. When converted to stroller mode, the carrier remains attached to the frame but the device can be propelled and steered without a rider on the carrier, providing usability without a rider while maintaining carrying capacity.
Solution Approach 2:
The hinge mechanism and auxiliary wheel act as intermediaries that enable the carrier to function in both bicycle and stroller modes. The auxiliary wheel provides additional support when in stroller mode, mediating the transition between the two operational states and enabling the carrier to be used without a rider.
Data Source
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AI summary
A bicycle convertible from a bicycle mode to a stroller mode comprises a frame having a front portion supporting a carrier and a rear portion. A front wheel supports the front portion of the frame, and a rear wheel supporting the rear portion of the frame in the bicycle mode. The rear portion of the frame is hinged to the front portion of the frame such that to convert the bicycle from the bicycle mode to the stroller mode the rear portion of the frame can be moved alongside the front portion of the frame to position the rear wheel to support a one side of the rear portion of the carrier. An auxiliary wheel, movable between a raised position raised from a riding surface in the bicycle mode can be moved to a lowered position contacting the riding surface in the stroller mode to supports the other side of the carrier.