Archery Bow Limb Spacer Structure for Shock and Vibration Damping
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Solution Overview
Problem
Existing archery bows experience significant shock and vibration upon arrow launch, necessitating improved structural designs to enhance performance.
Innovation Solution
Incorporation of a spacer made from a material with a higher elastic modulus than the limb material, which is more flexible and acts as a shock absorber or vibration damper, integrated between the limbs to minimize these effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid spacer material is used between the limbs, then structural stability is improved, but shock and vibration are increased
Solution Approach 1:
The patent applies parameter changes by transitioning from rigid spacer materials to elastomeric materials with specific physical properties. The elastomeric material exhibits temperature-dependent behavior: at lower temperatures it remains relatively rigid to maintain structural stability, while at higher temperatures it becomes more compliant to absorb shock and vibration. This parameter change in material properties resolves the contradiction between structural stability and vibration reduction.
Solution Approach 2:
The patent utilizes composite materials by combining elastomeric material with reinforcing fibers to create a spacer that integrates both rigidity and flexibility. The composite structure allows the spacer to maintain structural integrity while simultaneously providing vibration damping characteristics, thus resolving the contradiction between structural stability and shock absorption.
2Object-generated harmful factors
If a flexible spacer material is used between the limbs, then shock and vibration are reduced, but structural stability is compromised
Solution Approach 1:
The elastomeric material's temperature-dependent physical properties enable it to provide flexibility for vibration reduction while maintaining sufficient rigidity for structural stability. The material transitions between these states based on operating conditions, allowing both contradictory requirements to be satisfied dynamically.
Solution Approach 2:
The combination of elastomeric material with reinforcing fibers creates a composite structure that balances flexibility and rigidity. The elastomeric matrix provides shock absorption while the fiber reinforcement maintains structural integrity, resolving the contradiction between vibration reduction and structural stability.
3Object-generated harmful factors
If the spacer width is increased to improve shock absorption, then vibration damping is enhanced, but device complexity increases
Solution Approach 1:
The patent applies local quality by making the spacer width less than the limb width, creating a localized shock-absorbing element rather than a full-width component. This localized approach provides effective vibration damping at the critical interface between limbs while maintaining simplicity in the overall device structure and avoiding unnecessary complexity.
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 spacer effectively reduces initial force shock and residual vibrations, enhancing the overall performance and user experience of archery bows.
Implementation Method 1
The spacer comprises an elastomeric material. The elastomeric material is more flexible than the limb material and acts as a shock absorber or vibration damper.
Implementation Method 2
The elastomeric material acts as a shock absorber or vibration damper to minimize shock and vibration upon arrow launch.
Data Source
AI summary
In some embodiments, an archery bow limb assembly comprises a first limb, a second limb and a spacer. The spacer contacts the first limb and the second limb. The first limb comprises a limb material. The spacer comprises a spacer material comprising a higher elastic modulus than the limb material. A width of the spacer is less than a width of the first limb.