Archery Bow Cam Eccentric Adjustability for Draw Weight
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Solution Overview
Problem
Current archery bow cam assemblies lack adjustability, which limits the archer's ability to fine-tune the draw weight and energy storage, leading to inconsistent performance in launching projectiles.
Innovation Solution
Incorporating an adjustable member that can be repositioned to contact the cable at different distances from the axis of rotation, allowing for variation in the back wall firmness and draw weight progression, enabling archers to customize the archery bow's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed cam assembly design is used, then the manufacturing and setup process is simple, but the archer cannot fine-tune draw weight and energy storage, leading to inconsistent performance
Solution Approach 1:
The cam assembly incorporates an adjustable member that can be repositioned to different locations on the cam, changing the distance from the axis of rotation to the cable contact point. This dynamic adjustability allows the archer to fine-tune draw weight and energy storage characteristics without replacing entire components, resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
By changing the position of the adjustable member on the cam, the effective radius (distance from axis of rotation to cable contact) is varied. This parameter change directly affects the mechanical advantage and energy storage characteristics of the bow, enabling fine-tuning of performance parameters while maintaining a relatively simple overall structure.
2Ease of operation
If the member is made adjustable and repositionable, then fine-tuning of draw weight and energy storage is enabled, but the device complexity increases
Solution Approach 1:
The cam assembly is segmented into a fixed cam body and a separate adjustable member that can be independently positioned. This segmentation allows the adjustable portion to be optimized for ease of operation while the main cam structure remains simple and robust, reducing the overall impact on device complexity.
Solution Approach 2:
The adjustable member provides dynamic reconfigurability, allowing the archer to change the cable contact distance from the axis of rotation. This dynamic adjustment capability enables fine-tuning of draw weight and energy storage without requiring complex mechanisms, as the adjustment is achieved through a straightforward repositioning of the member on the cam surface.
Data Source
AI summary
An archery bow can include a member that is adjustable or replaceable relative to a cam assembly. The member can be affixed to the cam assembly such that the member contacts one or more cables while the archery bow is in a fully drawn or near-fully drawn state. The member can be adjustable, replaceable, swappable, or otherwise modifiable to contact particular portions of the cable disposed at various distances from an axis of rotation about which the cam assembly is rotating. While in a first configuration, the member can contact a portion of the cable that is a first distance from the axis of rotation. While in a second configuration, the member can be replaced or repositioned to contact a portion of the cable that is a second distance from the axis of rotation.