Crossbow Cable Guide for Wear Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing crossbow cabling arrangements do not provide a balanced system, leading to increased wear on cables routed through the stock.
Innovation Solution
A cable guide member is introduced, which is moveable and positioned between the stock and the power cables, featuring channels of different depths and orientations to guide and balance the cables, reducing friction and wear by using low friction materials and being secured by cable tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cables are routed directly through the stock aperture, then the structure is simple, but cable wear increases due to unbalanced forces and direct contact with the stock
Solution Approach 1:
A cable guide member is introduced as an intermediary component between the stock and the cables. This guide member includes channels that receive and guide the cables, positioning them away from direct contact with the stock while maintaining proper routing. The guide member distributes forces more evenly across the cable bundle, reducing localized wear on individual cables while adding only a single intermediate component to the system.
2Reliability
If cables are held away from the shooting axis, then cable wear is reduced, but the system becomes unbalanced due to asymmetric force distribution
Solution Approach 1:
The cable guide member is positioned asymmetrically relative to the stock centerline, with its channels configured to hold cables at specific offset distances from the shooting axis. This asymmetric positioning is deliberately designed to balance the forces acting on the cables during operation, distributing tensile and compressive loads more evenly across the cable bundle while maintaining their elevated position to reduce wear against the stock.
3Device complexity
If a fixed cable guide is used, then the structure is simple, but cable tension variations during drawing cannot be accommodated, leading to increased wear
Solution Approach 1:
The cable guide member is designed with movable characteristics, allowing it to shift position or adjust its orientation in response to varying cable tensions during the drawing cycle. This dynamic capability enables the guide to maintain optimal cable positioning throughout the full range of motion, accommodating tension variations without creating excessive localized stress or wear points on the cables.
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 cable guide member effectively balances the crossbow system, reducing wear on cables and enhancing the overall performance by maintaining equilibrium of forces and minimizing cable contact, thus extending the lifespan of the crossbow components.
Implementation Method 1
reducing friction and wear by using low friction materials
Data Source
AI summary
In some embodiments, a crossbow comprises a stock, a bow portion and a cable guide member. The bow portion comprises a power cable and a second cable. The cable guide member comprises a first channel and a second channel. At least a portion of the first channel is non-parallel to the second channel.