Rotating Bicycle Cable Clamping Mechanism for Wear Reduction
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Solution Overview
Problem
Current bicycle cable clamping mechanisms cause excessive wear on linkage cables due to bending under tension, leading to a short lifespan as they are frequently tensioned or released, requiring replacement after approximately ten thousand cycles.
Innovation Solution
A cable clamping mechanism featuring a rotatable fixing screw with a cable hole and a nut that clamps the linkage cable, allowing it to remain straight between the pressing and exit points, reducing wear through a washer and snap ring configuration that limits rotation and prevents slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the linkage cable is clamped between the fixing member and the linkage member, then the cable is securely fixed, but the cable bends under tension causing excessive wear and short lifespan
Solution Approach 1:
The fixing screw is made rotatable within the through hole, allowing the cable to rotate with the screw during tensioning cycles. This dynamic rotation prevents the cable from bending repeatedly at the same location, distributing wear and extending cable lifespan while maintaining secure clamping through the nut and washer assembly
2Ease of operation
If the cable hole is positioned on the second surface, then the cable can pass through freely, but the cable bends at the pressing point causing wear
Solution Approach 1:
A washer is introduced as an intermediary component between the nut and the cable. The washer distributes the clamping force evenly across the cable and provides a smooth surface that prevents the cable from bending or deforming under tension, reducing wear while maintaining ease of installation through the cable hole
3Duration of action of moving object
If the fixing screw is made rotatable, then the cable wear is reduced, but the screw may rotate excessively during assembly
Solution Approach 1:
A snap ring is installed on the fixing screw to prevent excessive rotation during assembly. The snap ring engages with a corresponding feature on the linkage member, providing a mechanical stop that limits the rotation range. This preliminary constraint ensures the screw can rotate enough to allow cable installation and wear reduction, but prevents uncontrolled rotation that would complicate assembly
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 mechanism extends the lifespan of the linkage cable by minimizing wear and allowing single-handed assembly, ensuring secure clamping without excessive force or rotation issues.
Implementation Method 1
The nut presses against the linkage cable so as to clamp the linkage cable in the cable hole
Implementation Method 2
The fixing screw is rotatable within the through hole relative to the linkage member so that the linkage cable can also simultaneously rotate relative to the linkage member
Data Source
AI summary
A cable clamping mechanism for a bicycle comprises a linkage member, a fixing screw, a nut and a linkage cable. The linkage member includes a first surface and a second surface. A through hole on the linkage member passes through the first surface and the second surface. The fixing screw is provided in the through hole and includes a cable hole passing through a radial direction of the fixing screw, where in the cable hole is on a side of the second surface. The nut joints a bottom end of the fixing screw. The linkage cable passes through the cable hole. The nut presses against the linkage cable so as to clamp the linkage cable in the cable hole. the fixing screw is rotatable within the through hole relative to the linkage member so that the linkage cable can also simultaneously rotate relative to the linkage member.