Adjustable Bow Eccentrics for Cam Lean and Arrow Flight
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Solution Overview
Problem
Existing archery bows do not adequately account for the unique physical attributes of individual archers, leading to suboptimal performance and shooting experience.
Innovation Solution
The archery bow features a cam assembly with a rotatable member that can be laterally repositioned relative to a bearing and bearing carriage, allowing adjustment of the bowstring plane and cam lean to improve arrow flight characteristics, and a removable bearing carriage that facilitates easy replacement of bearings without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the bow components are fixed for all archers, then the manufacturing cost and complexity are reduced, but the performance and shooting experience do not account for individual archer attributes
Solution Approach 1:
The cam assembly incorporates an adjustable rotatable member that can be repositioned along the axle to different locations, allowing the bow to dynamically adapt to different archer physical attributes such as draw length and draw weight, transforming a static component into a customizable one
Solution Approach 2:
The cam assembly is divided into separable components including the rotatable member, bearing carriage, and axle, which can be independently adjusted and repositioned, enabling customized configuration for different archers without requiring complete redesign
2Ease of repair
If the bearing is fixed within the rotatable member, then the structural integrity is maintained, but the bearing replacement requires complete disassembly of the cam assembly
Solution Approach 1:
The bearing carriage is designed as a separate removable component that houses the bearing, allowing the bearing to be accessed and replaced by simply removing the bearing carriage from the rotatable member without disassembling the entire cam assembly
Solution Approach 2:
The bearing carriage acts as an intermediary component between the bearing and the rotatable member, providing easy access to the bearing for maintenance while maintaining structural integrity during operation
Data Source
AI summary
An archery bow includes a riser, a limb, an axle, and a cam assembly. The cam assembly can include a rotatable member and one or more bearings. The rotatable member can be laterally repositionable or laterally translatable to one of a plurality of positions relative to the one or more bearings. In some examples, the one or more bearings can be disposed within a bearing carriage assembly and the rotatable member can be laterally repositionable or laterally translatable to one of a plurality of positions relative to the bearing carriage assembly.