Pedal Apparatus Pivot Shaft Alignment via Segmented Support
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Solution Overview
Problem
Conventional pedal apparatuses for percussion instruments face issues with wobbling and misalignment of pivot shafts due to integral formation, making accurate assembly and adjustment of pivot shafts difficult, leading to unwanted displacement and curvature of shaft bearing axes.
Innovation Solution
The pedal apparatus features a frame with separate support members that can be adjusted and connected to the frame via a connection section, allowing precise alignment and assembly of pivot shafts, preventing wobbling and misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If support posts and support sections are formed integrally, then manufacturing is simplified, but pivot shaft assembly precision deteriorates due to distortion and deformation
Solution Approach 1:
The frame is divided into separate components: support posts (12a, 12b) and support members (13a, 13b) that are assembled together rather than formed integrally. This segmentation allows the support members to be precisely positioned and fixed to the support posts, ensuring accurate pivot shaft assembly while maintaining manufacturing simplicity through modular construction.
2Stability of the object's composition
If support sections are fixed to frame at predetermined positions, then structural stability is improved, but adjustment capability of pivot shaft position is lost
Solution Approach 1:
The support members (13a, 13b) are designed with adjustable positioning capabilities relative to the support posts. The support members can be positioned at different locations on the support posts and fixed at desired positions, allowing the pivot shaft position to be adjusted while maintaining structural stability through secure fixing mechanisms.
3Device complexity
If support sections are spaced considerably apart, then frame structure is simplified, but correction of shaft bearing axis displacement becomes difficult
Solution Approach 1:
The frame is segmented into support posts and separately attachable support members. This segmentation enables the support members to be precisely positioned and aligned on the support posts, allowing for accurate shaft bearing axis alignment even when the support sections are spaced apart, while maintaining relatively simple frame structure.
Data Source
AI summary
Pivot shaft support members, formed as component parts separate from support posts of a frame of a pedal apparatus, are mounted on respective upper ends of the support posts, and the pivot shaft support members pivotably support the opposite ends of a pivot shaft for a beater rod. A heel section is provided on a rear end portion of an under plate of the pedal apparatus, and a pair of left and right hinge support members, formed as component parts separate from the heel section, are mounted to the heel section. The hinge support members pivotably support the opposite ends of a pivot shaft of a hinge section of a foot board. Because the pivot shaft support members and the hinge support members are separate component parts from the frame, mounted positions of these support members can be adjusted finely during mounting, to the frame, of the support members.