Bicycle Front Fork Jounce Bumper Position Adjustment
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Solution Overview
Problem
Existing bicycle front forks with jounce bumpers are not adjustable, limiting user control over the position at which they initiate, affecting the compression amount and force, and thus failing to provide personalized rider feedback during bottoming-out events.
Innovation Solution
The introduction of an adjustable jounce bumper within the front fork, allowing the user to adjust its position axially, thereby controlling the compression amount and force, and modifying the spring curve for personalized rider feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed position jounce bumper is used in the front fork, then the structure is simple and reliable, but the user cannot control the position at which the bumper initiates compression, limiting personalized rider feedback
Solution Approach 1:
The bumper position is made adjustable rather than fixed, allowing the user to dynamically change the bumper's axial position within the lower tube. This enables the suspension characteristics to be adapted to different riding conditions and rider preferences, resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
An adjuster mechanism serves as an intermediary between the user and the bumper position control. The adjuster allows precise axial positioning of the bumper without requiring complex mechanical systems, balancing ease of adjustment with structural simplicity.
2Ease of operation
If the bumper position is made adjustable to provide personalized rider feedback, then user control over compression amount and force is improved, but the device complexity increases
Solution Approach 1:
The system transitions from a static bumper position to a dynamically adjustable one, enabling users to control compression characteristics according to their preferences and riding conditions, thereby improving ease of operation.
Solution Approach 2:
The adjustable bumper position allows users to change the compression amount and force parameters by repositioning the bumper axially within the lower tube. This parameter adjustability provides personalized rider feedback while maintaining a relatively simple mechanical implementation.
Data Source
AI summary
A front fork comprises a leg including a first tube and a second tube. The first tube has a first end and a second end opposite the first end. The second tube has a third end and a fourth end opposite the third end. The first and second tubes are configured in a telescopic arrangement. The first and second tubes are moveable between a fully extended position and a fully compressed position. The front fork also includes a bumper disposed in the second tube near the fourth end. The bumper is to be contacted during a bottoming-out event. A position of the bumper is adjustable in the second tube.