Barrel Cable Suppressor for Crossbow Vibration Damping
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Solution Overview
Problem
Crossbows generate excessive vibrations and noise due to the movement of barrel cables during firing, which can be disruptive and cause wear, affecting the shooting experience.
Innovation Solution
A barrel cable suppressor is integrated into the crossbow, positioned within the cable slot, which includes a cable dampener to absorb vibrational energy and reduce noise by contacting the cables or bowstring upon release, thereby attenuating vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If barrel cables are used to increase bow force, then the amount of force provided by the crossbow is increased, but vibrations and noise are generated during firing
Solution Approach 1:
A barrel cable suppressor is introduced as an intermediary component between the barrel cables and the cable slot. This suppressor includes a dampener that contacts the cables during firing, serving as a mediator that absorbs vibrational energy while allowing the cables to continue performing their force-generating function. The suppressor thus mediates between the beneficial force generation and the harmful vibrations.
Solution Approach 2:
The invention converts the harmful vibrational energy and noise generated by the barrel cables into beneficial heat energy through the dampener. The dampener is designed to absorb the vibrational energy during cable movement, transforming it into heat that is dissipated, thereby converting the harmful effect (vibrations and noise) into a harmless form (heat).
2Productivity
If cables move along the longitudinal axis within the cable slot during firing, then energy is transferred to propel the arrow, but wear and friction increase
Solution Approach 1:
The barrel cable suppressor acts as an intermediary that reduces direct friction between the cables and the cable slot walls. By positioning the suppressor within the cable slot, it provides a controlled contact surface that reduces wear on the cables while still allowing necessary movement for energy transfer.
Solution Approach 2:
The dampener material is selected and designed to change the friction characteristics during operation. The dampener provides a surface with optimized friction properties that allows smooth cable movement during the power stroke while minimizing wear, effectively changing the friction parameter from high (direct cable-slot contact) to controlled (cable-dampener contact).
3Reliability
If a cable slide is used to reduce wear and friction, then friction is reduced, but vibrations and noise are not sufficiently attenuated
Solution Approach 1:
The invention merges the functions of the cable slide (wear reduction) and the vibration dampener (noise reduction) into a single integrated barrel cable suppressor component. This combined component simultaneously provides low-friction movement for the cables and effective vibration attenuation, resolving the limitation of using a cable slide alone.
Solution Approach 2:
The barrel cable suppressor is constructed using composite materials or a multi-layer structure that combines low-friction surfaces (for wear reduction) with vibration-absorbing materials (for noise reduction). This composite construction allows the single component to perform both functions effectively.
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 barrel cable suppressor effectively reduces unwanted vibrations and noise, enhancing the shooting experience and potentially allowing for retro-fitting to existing crossbows, including compound and recurve models.
Implementation Method 1
the transferred energy is used to propel and arrow or bolt from the crossbow. Upon propelling the arrow or bolt, energy transferred to the bowstring and/or cables and not used to propel the arrow or bolt can cause the bowstring and/or cables to vibrate.
Implementation Method 2
The cable dampener may be contacted by the bowstring or cables, thereby reducing or eliminating cable and/or bowstring vibration.
Implementation Method 3
The barrel cable suppressor may at least partially attenuate vibrations and noise caused by the release of the bowstring.
Data Source
AI summary
A crossbow may comprise a main beam, a trigger mechanism, a bow assembly, and a barrel cable suppressor. First and second cables may pass through a cable slot formed in a barrel member. The first and second cables may be received by first and second cams respectively such that the rotation of the first and second cams in a first direction causes the first and second limbs to be pulled generally inward towards the main beam. The barrel cable suppressor may be positioned at least partially within the cable slot and may at least partially suppresses vibrations and noise caused by the first and second cables when the bowstring is released from the trigger mechanism.