Pedal Assembly Independent Hammer Rotation
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Solution Overview
Problem
Conventional pedal assemblies for percussion instruments with two independently rotatable hammers require a customized, fork-shaped rack, increasing costs due to specialized support structures.
Innovation Solution
A pedal assembly design featuring a base plate, rack poles, a pedal, an axle member with coaxial sleeves and bearings, and a transmission member that allows for independent rotation of hammers without the need for fork-shaped rack poles, using a base plate and two standard rack poles to support the axles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a customized fork-shaped rack is used to support two independently rotatable hammers, then the hammers can be supported and rotated independently, but the cost increases due to specialized support structures
Solution Approach 1:
The rack poles are designed as standard universal components that can support multiple axles (first axle and second axle) simultaneously. Instead of requiring specialized fork-shaped racks for each hammer, a single standard rack pole can support multiple axles through the axle supporting units, achieving multi-functionality and reducing the need for customized components.
Solution Approach 2:
The support structure is segmented into multiple independent axle supporting units, where each unit can independently support an axle for a hammer. This segmentation allows standard rack poles to support multiple axles through discrete supporting units rather than requiring a single customized fork-shaped structure, thereby reducing manufacturing costs while maintaining independent rotation capability.
2Ease of manufacture
If standard rack poles are used instead of customized fork-shaped racks, then manufacturing cost is reduced, but the ability to support two independently rotatable hammers must be maintained
Solution Approach 1:
Axle supporting units are introduced as intermediary components between the standard rack poles and the axles. These supporting units enable standard rack poles to indirectly support multiple axles and hence two independently rotatable hammers, without requiring the rack poles themselves to be customized into fork-shaped structures. The intermediary maintaining the functional requirement while using standard components.
3Ease of operation
If two axles are supported by three points on fork-shaped rack poles, then independent rotation is achieved, but device complexity increases
Solution Approach 1:
Standard rack poles are designed to perform multiple functions: supporting the first axle, supporting the second axle, and providing structural stability. By making the rack poles universal components that can support multiple axles through standardized axle supporting units, the structural complexity is reduced compared to customized fork-shaped racks, while maintaining the ease of operation for independent hammer rotation.
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
This design reduces costs by eliminating the need for specialized rack poles, enabling efficient support and rotation of two hammers while maintaining functionality.
Implementation Method 1
The first bearings are disposed between the first sleeve and the axial unit. The second bearings are disposed between the second sleeve and the axial unit.
Data Source
AI summary
The pedal assembly of the present invention has a base plate, two rack poles, a pedal, an axle member and a transmission member. The axle member includes a first sleeve, an axial unit and two first bearings. A first axial bore is defined in the first sleeve. The axial unit has a first connecting section and an extending section. The first connecting section is received in the first axial bore. The first bearings are disposed between the first sleeve and the axial unit. The axial unit is rotatable independent from the first sleeve. The first sleeve is rotatably supported by one of the rack poles, and the axial unit is rotatably supported by the other one of the rack poles.