Composite Bat Multi-Wall Vibration Damping
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Solution Overview
Problem
Composite baseball and softball bats with multi-wall constructions experience undesirable vibration transfer from the barrel to the handle, affecting user feel and energy transfer during ball striking, while existing designs either isolate the handle, reducing tactile sensation or result in energy loss due to multi-piece constructions.
Innovation Solution
Incorporating a damping device between the handle and the outer barrel of a multi-wall composite bat, which dampens vibrations and separates the outer and inner walls, allowing for reduced vibration transfer while maintaining a solid connection for improved energy transfer and tactile sensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the inner and outer barrels are bonded together at the end and adjacent the tapering section, then the structural integrity and energy transfer to the ball is improved, but vibration transfer to the handle increases
Solution Approach 1:
The barrel is divided into multiple walls (inner and outer barrels) that are separated by damping material in certain regions. This segmentation allows the walls to move independently during ball impact, reducing vibration transfer to the handle while maintaining structural integrity through selective bonding regions.
Solution Approach 2:
A damping material or damping device is introduced as an intermediary between the inner and outer barrels. This intermediary absorbs and dissipates vibrational energy, preventing it from traveling to the handle while allowing the barrels to remain structurally connected for energy transfer to the ball.
2Object-affected harmful factors
If the handle is isolated from the barrel using damping devices, then vibration transfer is reduced, but tactile sensation and feel of the bat is reduced
Solution Approach 1:
The damping material is placed selectively in specific regions (such as away from the handle or in controlled amounts) rather than throughout the entire barrel structure. This local application reduces vibration transfer while preserving tactile feedback in the handle region where the user needs sensitivity.
3Ease of manufacture
If a multi-piece construction with bonded handle and barrel is used, then manufacturing is simplified, but energy loss occurs during use
Solution Approach 1:
The barrel is segmented into multiple walls that can be manufactured separately and then assembled. This segmentation allows each wall to be optimized for its specific function while maintaining an integral feel, reducing energy loss through more efficient stress distribution and transfer during ball impact.
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 damping device effectively reduces vibration transfer to the handle, enhancing the user's tactile experience and improving energy transfer to the ball without compromising the bat's performance, allowing for a more efficient and pleasing hitting experience.
Implementation Method 1
The damping device can dampen vibrations transmitted from the outer wall to the handle
Implementation Method 2
the barrels can be at least partially separated from one another, thereby allowing the barrels to slide or move relative to one another during an impact with a ball
Data Source
AI summary
A bat has a barrel with a multi-wall construction. The handle can be formed integrally with the inner wall. A damping device can be installed between the handle and the outer wall of the barrel. The damping device can dampen vibrations transmitted from the outer wall to the handle. The damping device can also separate the outer wall from the inner wall adjacent the handle section. The inner and outer walls can be bonded together adjacent the end of the bat. Alternatively, the inner and outer walls can be entirely free of bonding to one another. Additionally, a damping device can separate the outer wall from the inner wall adjacent the end of the bat. Furthermore, the bat can include a pair of damping devices that separate the inner wall from the outer wall both adjacent the handle section and at the end of the bat.