Adjustable Bicycle Frame Pivot for Anti-Squat Tuning

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Solution Overview

Problem

Existing bicycle frames with suspension systems face challenges in adapting anti-squat to the needs of the rider and driving situation, leading to inefficiencies and reduced propulsion efficiency due to squat during pedaling.

Innovation Solution

A bicycle frame with a pivot joint that allows for adjustable positioning of the pivot point, enabling individualized adjustment of anti-squat through a movable pivot joint and flip chip mechanism, allowing displacement of the pivot point to optimize pedaling efficiency across different chainring sizes without affecting static geometry or suspension travel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the pivot point position is fixed, then the frame structure is simple and stable, but the anti-squat cannot be adapted to different rider needs and driving situations

Engineering Contradiction:

Improveadaptability of anti-squatVSAvoidcomplexity of pivot joint positioning system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the dynamics principle by making the pivot joint movable instead of fixed. The pivot joint can be positioned at different locations along the seat tube, allowing the anti-squat characteristics to be dynamically adjusted according to rider needs and driving conditions. This transforms a static frame structure into a dynamically adjustable system that adapts to varying requirements without requiring complete frame redesigns.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements parameter changes by varying the position of the pivot joint along the seat tube. By changing this single geometric parameter, the anti-squat characteristics of the suspension system are modified. This allows for continuous adjustment of the mechanical properties of the frame to match different rider weights, riding styles, and terrain conditions.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the pivot point position is adjusted to optimize anti-squat, then pedaling efficiency improves, but the static geometry and suspension travel characteristics may be affected

Engineering Contradiction:

Improvepedaling efficiencyVSAvoidstatic geometry stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The patent applies local quality by making only the pivot joint position adjustable while keeping the rest of the frame geometry fixed. This localized adjustment allows optimization of anti-squat characteristics without altering the overall static geometry of the frame. The adjustable element is confined to a specific location (the pivot joint along the seat tube) while maintaining global geometric stability.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If a movable pivot joint system is implemented, then anti-squat adaptability is improved, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveadjustability of pivot jointVSAvoidmanufacturing ease of pivot joint system

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent applies segmentation by separating the pivot joint from the main frame structure, allowing it to be independently positioned and adjusted. The pivot joint is designed as a distinct component that can be located at different positions along the seat tube, enabling modular assembly and simplified manufacturing. This segmentation allows the adjustable function to be implemented without complicating the overall frame construction.

Inventive Principle:

Principle #1Segmentation

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 adjustable pivot joint system enhances adaptability of anti-squat to various riding conditions, maintaining efficiency and consistency across different chainring sizes, thereby improving pedaling performance and reducing energy loss.

Implementation Method 1

The bicycle frame has a main frame and a rear frame that can be moved relative to the main frame around a pivot point... the pivot joint is designed to allow the main frame and the rear frame to rotate relative to each other

Methodology Applied

Scientific EffectRotation:

Data Source

PatentUS20260015061A1Bicycle Frame and Bicycle

Publication Date: 2026.01.15 CANYON BICYCLES

AI summary

The invention relates to a bicycle frame with a main frame, a rear frame displaceable relative to the main frame about a pivot point, and a pivot joint forming the pivot point, wherein the pivot joint is displaceable to change the position of the pivot point. The invention also relates to a bicycle with such a bicycle frame.