Crossbow Pass-Through Cabling for Balanced Force Distribution
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Solution Overview
Problem
Existing compound archery bows face challenges in achieving high speed, accuracy, and reliability while being lightweight and reliable, with a need for improved structural designs.
Innovation Solution
The bow incorporates a frame with rotatable members featuring pass-through apertures and cable tracks that allow for a novel cabling arrangement, including power cables that pass through these apertures and are taken up by separate cable tracks on either side of the rotatable members, enhancing balance and force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional cabling arrangements are used in compound bows, then structural simplicity is maintained, but shooting speed, accuracy, and reliability are limited
Solution Approach 1:
The power cable is divided into multiple segments (first segment, second segment, third segment) that are arranged in different spatial locations. The first segment is oriented to the first side of the rotatable member, the second segment passes through the pass-through aperture, and the third segment is oriented to the second side, creating a segmented cabling arrangement that improves force distribution and shooting performance
Solution Approach 2:
The cabling system transitions from a two-dimensional planar arrangement to a three-dimensional spatial configuration by utilizing the pass-through aperture to route the cable through the rotatable member. This adds a third dimension to the cable routing, allowing for optimized force vectors and improved bow performance
2Reliability
If heavier materials and structures are used to improve reliability, then shooting reliability increases, but bow weight increases
Solution Approach 1:
The patent changes the spatial parameters of the cabling system by routing the power cable through the pass-through aperture of the rotatable member. This parameter change in cable routing geometry allows for improved force distribution and shooting reliability without requiring additional materials or increased component sizes that would add weight
3Stability of the object's composition
If conventional cable routing is used, then manufacturing simplicity is maintained, but force distribution and balance are insufficient
Solution Approach 1:
The pass-through aperture in the rotatable member serves multiple functions: it provides a routing path for the power cable, maintains structural integrity of the rotatable member, and enables the segmented cable arrangement that improves force distribution. This multi-functional design achieves better force balance without adding separate components that would complicate manufacturing
Data Source
AI summary
In some embodiments, a crossbow comprises a first rotatable member comprising a first pass-through aperture and a second rotatable member comprising a second pass-through aperture. A first power cable comprises a first pass-through segment and a second power cable comprises a second pass-through segment. The first pass-through segment is oriented in the first pass-through aperture and the second pass-through segment is oriented in the second pass-through aperture. In some embodiments, the cables attach to a stock. In some embodiments, the cables attach to a prod.