Bicycle Frame Suspension Shock Positioning Behind Seat Tube
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Solution Overview
Problem
Existing bicycle frames with suspension systems often position the suspension shock in front of the seat tube, limiting space for water bottles or frame bags and compromising the structural integrity of the front triangle.
Innovation Solution
A bicycle frame design that pivotably connects a front frame assembly to a rear frame assembly via top and bottom linkages, positioning the suspension shock behind the seat tube, allowing for an open front triangle and accommodating two or more water bottles or a full-size frame bag while maintaining structural stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suspension shock is positioned in front of the seat tube, then the suspension system can be implemented, but the space for water bottles or frame bags is limited and the structural integrity of the front triangle is compromised
Solution Approach 1:
The suspension shock is repositioned from the traditional front-of-seat-tube location to a rearward location behind the seat tube. This spatial relocation in the longitudinal dimension of the frame resolves the contradiction by freeing up the front triangle area for storage accessories while maintaining structural integrity through the alternative shock mounting configuration between the chain stay yoke and seat tube
2Stability of the object's composition
If the suspension shock is positioned in front of the seat tube, then the suspension system can be implemented, but the front triangle remains closed compromising structural integrity
Solution Approach 1:
By moving the shock assembly to a rearward position behind the seat tube, the front triangle geometry is preserved and opened up, allowing the frame to maintain structural stability while gaining adaptability for various storage configurations including water bottle mounts and frame bag attachments
Solution Approach 2:
The chain stay yoke serves as an intermediary mounting point that enables the suspension shock to be positioned rearward behind the seat tube. This intermediary structure allows the shock to be securely mounted without interfering with the front triangle's structural integrity or storage capacity
Data Source
AI summary
A bicycle frame includes a front frame assembly and a rear frame assembly pivotably connected to the front frame assembly. The front frame assembly includes a bottom bracket shell, a seat tube extending from the bottom bracket shell toward a saddle support, and a forward shock attachment point statically located on the seat tube between the bottom bracket shell and the saddle support. The rear frame assembly includes a chain stay fork including a chain stay yoke. A chain stay extends from the chain stay yoke to a rear wheel forkend. The chain stay fork includes a rearward shock attachment point statically located on the chain stay yoke. The forward shock attachment point and the rearward shock attachment point cooperate to position a suspension shock between the front frame assembly and the rear frame assembly behind the seat tube.