Crossbow Buffering Spacer Frequency Mismatch Damping
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Solution Overview
Problem
Conventional crossbows do not provide sufficient damping effect, resulting in significant impact force and vibration on the stock assembly during bolt shooting.
Innovation Solution
Incorporation of a buffering spacer made of hardened plastic with a distinct vibrating frequency, mounted between the retainer and the mounting base, to disperse and reduce the impact force by preventing shock wave transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional retainer is used to provide damping effect, then the structure is simple, but the damping effect is insufficient and impact force remains high
Solution Approach 1:
The patent introduces a buffering spacer as an intermediary component between the retainer and the mounting base. This spacer, made of hardened plastic with specific vibration characteristics, acts as a mediator that disrupts the transmission path of shock waves, thereby reducing impact force without significantly complicating the overall structure.
Solution Approach 2:
The patent employs composite material strategy by combining hardened plastic (for the buffering spacer) with the existing retainer material. The hardened plastic provides specific vibration damping properties that complement the retainer, creating a composite damping system that effectively reduces impact force while maintaining structural integrity.
2Object-affected harmful factors
If a buffering spacer with different vibrating frequency is added, then the damping effect is enhanced, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by carefully selecting the vibrating frequency parameter of the buffering spacer to be different from that of the retainer. This frequency mismatch is the key parameter that prevents resonance and shock wave transmission, enhancing damping effect. The spacer's dimensions and material properties are optimized to achieve the desired frequency characteristic.
Solution Approach 2:
The patent employs composite material strategy by combining hardened plastic (for the buffering spacer) with the existing retainer material. The hardened plastic provides specific vibration damping properties that complement the retainer, creating a composite damping system that effectively reduces impact force while maintaining structural integrity.
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 crossbow effectively mitigates the impact force and vibration by utilizing the differing vibrating frequencies of the spacer and retainer to absorb and dissipate the shock, enhancing the overall damping effect.
Implementation Method 1
The different vibrating frequencies between the buffering spacer and the retainer prevents transmission of shock waves between the retainer and the buffering spacer to disperse and reduce the impact force of the crossbow after shooting a bolt
Implementation Method 2
The different vibrating frequencies between the buffering spacer and the retainer prevents transmission of shock waves between the retainer and the buffering spacer
Data Source
AI summary
A crossbow has a stock assembly and a bow assembly. The stock assembly has a body, a retainer and a buffering spacer. The retainer is made of hardened plastic and has a vibrating frequency, a bolt groove, a mounting hole and a holding protrusion. The buffering spacer is made of hardened plastic and has a shape corresponding to the retainer, a vibrating frequency different from the vibrating frequency of the retainer, a gap, a through hole and a holding hole. The bow assembly is securely connected to the stock assembly and has a mounting base, two bow arms, a bowstring and a fastener. The different vibrating frequencies between the buffering spacer and the retainer can destroy the transmission of the shock wave between the retainer and the buffering spacer to disperse and reduce the impact force of the crossbow after shooting a bolt.