Drum Pedal Rotary Shaft Bearing Assembly Design
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Solution Overview
Problem
Conventional drum pedals are heavy, leading to increased risk of tendinitis and reduced precision and rapidity in striking, and are often complex and costly due to numerous pieces and manufacturing tolerances.
Innovation Solution
A drum pedal design featuring a support with a bearing assembly positioned between the actuation and return mechanisms, using a rotary shaft with a bearing chamber that transfers rotation to the outer side of the bearing, allowing for lighter construction and improved balance and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the drum pedal is made heavier to increase striking power, then the power and solidity of the pedal is improved, but the risk of tendinitis increases and the precision and rapidity of striking deteriorates
Solution Approach 1:
The drum pedal is divided into separate functional modules: a support structure, a rotary shaft assembly with bearing, a beater mechanism, an actuation mechanism, and a return mechanism. This segmentation allows each component to be optimized independently, enabling the use of lighter materials and reduced mass in non-critical areas while maintaining striking power where needed, thereby improving precision and rapidity without sacrificing force.
Solution Approach 2:
The patent introduces a bearing assembly that changes the friction parameter of the rotary shaft, allowing for smoother rotation with less effort. This parameter change enables the use of lighter pedal components while maintaining or improving striking power, as the bearing reduces the force required to initiate and maintain rotation, thereby improving both precision and rapidity of striking.
2Force
If the drum pedal is made heavier to increase striking power, then the power of the pedal is improved, but the return mechanism needs to be more heavily tensioned which increases the risk of tendinitis
Solution Approach 1:
The bearing assembly fundamentally changes the friction parameter of the rotary shaft, reducing it to minimal levels. This allows the return mechanism to operate with much lower tension forces while still effectively returning the beater to its initial position. The reduced tension in the return mechanism directly lowers the risk of tendinitis, as the user's foot does not need to overcome heavy spring tension during the return stroke.
Solution Approach 2:
The bearing acts as an intermediary element between the rotary shaft and the support structure, mediating the interaction by reducing friction. This intermediary allows the system to achieve the same return function with significantly lower forces, reducing the harmful effect of heavy return mechanism tension on the user's tendons and muscles.
3Weight of moving object
If more pieces are added to the drum pedal to reduce weight and complexity, then the weight and manufacturing cost are reduced, but the vulnerability to adjustment issues between pieces increases
Solution Approach 1:
The patent combines multiple functions into integrated assemblies: the bearing assembly integrates the rotary shaft support and rotation function; the actuation mechanism integrates the foot plate, chain, and sprocket; the return mechanism integrates the spring and mounting components. This merging reduces the total number of separate adjustment interfaces while maintaining the lightweight design, thereby improving reliability by reducing the number of potential adjustment issues between pieces.
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 design achieves a precise and rapid striking action while minimizing weight and manufacturing complexity, reducing the risk of tendinitis and lowering costs by simplifying the number of pieces and improving balance and stability.
Implementation Method 1
Including a bearing assembly into the drum pedal can improve smooth rotation of the rotary shaft
Implementation Method 2
Said return mechanism may include a pre-tensioned element, such as a spring or any other suitable element
Data Source
AI summary
Drum pedal for striking a drum, the pedal comprising:a support having at least one leg;a rotary shaft borne by said support;a beater mounted on said rotary shaft and configured to rotate upon rotation of said rotary shaft, wherein the beater is configured to strike the drum;an actuation mechanism for rotating the beater in a first direction towards the drum;a return mechanism for rotating the beater in a second direction opposite the first direction away from the drum.