Modular Cam Adjustment Module for Compound Archery Bow
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Solution Overview
Problem
Conventional cam systems for compound archery bows require significant time and effort to adjust draw length, draw stop, and draw force curve, often leading to inaccurate registration and premature wear, especially when using module replacement methods that require specialized equipment and expertise.
Innovation Solution
A cam system with a modular design that allows for easy attachment and detachment of adjustment modules, featuring a draw stop that can be selectively moved and indexed features for precise alignment, enabling quick and precise adjustments to draw length and draw force characteristics without the need for specialized tools or technicians.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If module replacement method is used to adjust draw length, then adjustment capability is improved, but registration accuracy deteriorates due to imperfect thread matching and wear
Solution Approach 1:
The cam system is divided into separate modular components (cam body, adjustment module, draw stop) that can be independently manufactured and assembled. The adjustment module includes a groove that fits into a corresponding groove in the cam body, creating a precise mechanical interface that eliminates the need for threaded connections and ensures accurate registration without wear.
Solution Approach 2:
The groove interface acts as an intermediary mechanism between the cam body and adjustment module. This groove-to-groove connection serves as a precise alignment feature that mediates the relationship between components, ensuring accurate positioning and registration while allowing for easy assembly and disassembly without threading operations.
2Ease of manufacture
If threaded connection is used to attach module to cam, then ease of assembly is improved, but reliability deteriorates due to wear and registration issues
Solution Approach 1:
The connection system is segmented into separate groove features on the cam body and adjustment module, eliminating the need for a unified threaded hole and screw assembly. This segmentation allows for simpler manufacturing of individual components while creating a more reliable through-fit connection that resists wear.
Solution Approach 2:
The threaded mechanical connection system is replaced with a groove-based mechanical interface. The groove-to-groove fit provides a more reliable connection that does not depend on thread engagement, eliminating wear-related registration issues while maintaining ease of assembly through simple insertion and securing mechanisms.
3Manufacturing precision
If specialized equipment and expertise are required for module replacement, then adjustment precision is improved, but ease of operation deteriorates
Solution Approach 1:
The cam system is designed to be self-adjusting through a user-friendly interface. The adjustment module can be easily attached and detached from the cam body using simple manual operations, eliminating the need for specialized bow presses or technical expertise. The groove-based connection provides precise alignment automatically, allowing users to perform adjustments independently.
Solution Approach 2:
The system allows for parameter changes in draw length and draw stop position through simple module replacement. The groove-based interface enables users to switch between different adjustment modules with different specifications without requiring complex tools or procedures. This parameter adjustment is made accessible to end users while maintaining precision through the engineered groove fit.
Data Source
AI summary
A cam system for an archery bow including a module that is readily attached to and detached from a cam while leaving the cam on the bow. The module can include a draw stop selectively moveable relative to the module, even while the module is joined with the cam, to adjust the draw stop to specific locations corresponding to different draw lengths and/or draw stop walls of the bow. The module can include a recess that surrounds only part of an axle joining the cam and bow so the entire module is removable from the cam without removing the axle. The cam system can include indexing features that precisely and consistently align features of the cam and module. These features can include first and second indexing posts, and corresponding indexing holes, that register with one another to precisely align the cam and module when joined.