Rotating Bicycle Chainring Bash Guard With Partial Tooth Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bash guards mounted to bicycle frames do not rotate with the chainring, potentially interfering with the bicycle's drive train operation and providing imprecise protection.
Innovation Solution
A bash guard system that integrates with the chainring through windows, allowing it to rotate with the chainring, secured by threads or threaded inserts and fasteners, and includes covers and backplates for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bash guard is mounted to a frame mount secured to the bicycle frame, then the bash guard provides protection for the chainring and chain, but the bash guard does not rotate with the chainring, potentially interfering with the operation of the bicycle drive train and providing imprecise protection
Solution Approach 1:
The bash guard is designed to rotate with the chainring rather than remaining stationary on the frame. This dynamic attachment allows the protection to move synchronously with the chainring, ensuring that the protected elements remain properly positioned during rotation while avoiding interference with the drive train operation.
Solution Approach 2:
The bash guard system is divided into multiple segments including a first bash guard, a second bash guard, and a bridge component. These segmented parts can be independently positioned and secured to the chainring at different locations, allowing flexible configuration that adapts to the specific geometry and operational requirements of the chainring and drive train.
2Reliability
If a bash guard covers all teeth of the chainring, then complete protection is provided, but the weight increases and the chainring rotation may be restricted
Solution Approach 1:
Instead of covering the entire chainring uniformly, the bash guards are strategically positioned to provide enhanced protection at specific high-risk areas. The first and second bash guards cover portions of the chainring teeth where impact is most likely to occur, while leaving other areas exposed. This localized protection approach maintains adequate safety while minimizing unnecessary weight and preserving smooth chainring rotation.
Solution Approach 2:
The bash guard system provides partial coverage of the chainring teeth rather than complete coverage. By covering only the necessary portions with the first and second bash guards, the design achieves sufficient protection against typical impact scenarios while avoiding the excessive weight and rotational restriction that would result from full-coverage protection.
3Reliability
If a bash guard is designed to rotate with the chainring, then proper protection and drive train operation are achieved, but the complexity of attachment and installation increases
Solution Approach 1:
The attachment system is segmented into distinct components: a first attachment mechanism for the first bash guard, a second attachment mechanism for the second bash guard, and a bridge component connecting the two. This segmentation allows each attachment point to be optimized independently and simplifies the overall installation process, as each component can be secured to the chainring separately rather than requiring a single complex attachment system.
Solution Approach 2:
The bridge component serves as an intermediary element that connects the first and second bash guards to the chainring. This intermediate structure simplifies the attachment mechanism by providing a stable mounting point between the two bash guards, reducing the complexity of directly attaching both guards to the rotating chainring while maintaining proper synchronization.
Data Source
AI summary
A chainring protection system includes a chainring having a torque input section and a torque output section. The torque output section is radially outer relative to the torque input section and has a plurality of teeth. The chainring protection system also includes a cover connected to the chainring, such that the cover at least partially covers a circumferential portion of the torque output section. The circumferential portion of the torque output section includes less than all teeth of the plurality of teeth.