Compound Bow Cable Adjustment Assembly for Cam Timing Sync
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Solution Overview
Problem
The performance of compound bows is degraded when the timing of the two cams is not synchronized during the drawing of the bow string, affecting the optimal functioning of the cable system.
Innovation Solution
A cable assembly with an adjustment assembly that includes a first and second unit, connected by a lock, allowing for the adjustment of cable segment length to synchronize the timing of the cams by rotating the units relative to each other, with a lock mechanism to secure the desired position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cable length is fixed at manufacturer specification, then the cam timing synchronization is optimized for standard conditions, but the cam timing cannot be adjusted for custom or non-standard applications
Solution Approach 1:
The cable assembly transitions from a fixed-length design to an adjustable-length design through a rotatable connection mechanism. The second cable segment can be rotated relative to the first cable segment around the longitudinal axis, allowing dynamic adjustment of the effective cable length to achieve proper cam timing synchronization for different applications.
Solution Approach 2:
The cable assembly is divided into two separate cable segments (first cable segment and second cable segment) that can be independently adjusted. This segmentation allows the timing to be fine-tuned by rotating one segment relative to the other, providing versatility without requiring complete cable replacement.
2Manufacturing precision
If the cable segments are made rotatable relative to each other, then the cam timing can be synchronized for optimal performance, but the cable assembly structure becomes more complex
Solution Approach 1:
The adjustment assembly serves multiple functions: it connects the two cable segments, allows rotational adjustment for timing synchronization, and provides a locked position to maintain the adjusted configuration. This multi-functionality reduces the need for separate adjustment mechanisms and keeps the overall structure relatively simple.
3Productivity
If custom cable lengths are used to match designed cam rotation, then the energy transfer efficiency is improved, but the cable assembly requires additional adjustment mechanisms
Solution Approach 1:
The adjustment assembly is designed to be user-adjustable without requiring specialized tools or complex procedures. The archer can rotate the second cable segment relative to the first to achieve the correct cable length and timing, then lock it in place, allowing self-service adjustment for optimal energy transfer efficiency.
Data Source
AI summary
A compound bow includes a cable assembly including an adjustment assembly. The adjustment assembly has a first unit and a second unit on a rotational axis of the cable assembly. A first cable segment has a terminal end rotationally fixed to the first unit. A second cable segment has a terminal end rotationally fixed to the second unit. The adjustment assembly includes a lock between the first unit and the second unit. The lock is movable between a locked position and an unlocked position. The first unit and the second unit are rotatable relative to each other about the rotational axis R of the adjustment assembly when the lock is in the unlocked position. The first unit and the second unit are fixed relative to each other about the rotational axis of the adjustment assembly when the lock is in the locked position.