Compact Broadhead Tunable Blade Orientation
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Solution Overview
Problem
Modern broadheads are challenging to tune, leading to accuracy issues in arrow flight due to their alignment requirements with the arrow shaft and bow components, and existing methods for adjusting their blades can damage carbon arrows and weaken glue bonds in aluminum arrows.
Innovation Solution
A compact broadhead design with a tunable system that allows blade orientation adjustment relative to the arrow shaft, featuring a tip with aligned blade slots and a securing mechanism using an elongated engaging bar, enabling the blades to be positioned closer to the tip and allowing for independent orientation without rotating the insert, thus improving clearance and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the broadhead is made compact by positioning blades closer to the tip, then the length of the broadhead is reduced and clearance is improved, but the blades need precise alignment with cutting arrises which increases manufacturing complexity
Solution Approach 1:
The broadhead is divided into separate components: a tip with cutting arrises, blades with securing flanges, and an engaging bar. The blades can be manufactured separately and then assembled into the tip, allowing for precise alignment of blade cutting edges with the tip cutting arrises through the slot and flange mechanism, while maintaining a compact overall length.
Solution Approach 2:
The slot in the tip and the securing flange on the blade act as intermediaries that facilitate precise alignment. The slot guides the blade into proper orientation with the cutting arrise, and the flange provides a stopping point that ensures consistent positioning, thereby achieving accurate alignment without requiring complex manufacturing processes.
2Adaptability or versatility
If the insert is rotated within the arrow shaft to adjust blade alignment, then the blade orientation can be changed, but the glue bond is weakened and carbon arrows are damaged
Solution Approach 1:
The engaging bar provides a dynamic adjustment mechanism. It can be rotated independently within the tip to change the orientation of the blades relative to the arrow shaft, while the tip itself remains fixed in the insert. This allows for blade orientation adjustment without rotating the insert or weakening the glue bond.
Solution Approach 2:
The system is segmented into three independent rotatable components: the insert in the arrow shaft, the tip in the insert, and the engaging bar with blades in the tip. This segmentation allows each component to be adjusted independently, enabling blade orientation changes through engaging bar rotation alone, thereby preserving the integrity of the glue connections at both the insert-tip and tip-arrow interfaces.
3Adaptability or versatility
If the broadhead includes a tunable system with an elongated engaging bar, then blade orientation can be adjusted independently, but the device complexity increases
Solution Approach 1:
The adjusting mechanism is merged with the structural components of the broadhead. The engaging bar serves dual purposes: it secures the blades in place through the slots while simultaneously providing the rotational adjustment capability. The slots in the tip and base serve both to hold the blades and to guide the engaging bar, eliminating the need for separate adjustment mechanisms and reducing overall complexity.
Data Source
AI summary
An axially compact broadhead for archery and other such purposes is disclosed. The broadhead may be formed from a tip configured to facilitate penetration of the tip into an object with a pointed distal end and an opposite proximal end. The tip may include a central tip chamber extending distally into the tip from the proximal end and a plurality of blade slots extending from the proximal end of the tip toward the distal end. A base may be positioned proximally of the tip and have a central base chamber. One or more blades may be positioned in the blade slots and extend outwardly from the tip. An elongated engaging bar may extend through the central base chamber of the base and into the central tip chamber to affix the blades and provide a post for attaching the broadhead to an insert of an arrow.