C-Shaped Parallelism Control Device for Dual-Shaft Systems
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Solution Overview
Problem
Conventional rotary shaft structures in dual-shaft systems for electronic devices are complex, prone to wear, and require high precision assembly, leading to deflection issues and increased manufacturing costs due to the need for precise alignment of retainer rings and plates to maintain parallelism.
Innovation Solution
A parallelism control device with a C-shaped fixing unit having cantilever sections, a connection section, and a split, which provides an elastic action force to keep rotary shafts in parallel alignment, eliminating the need for multiple gaskets and springs, and simplifying the assembly process by allowing for shorter rotary shafts and reduced precision requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional rotary shaft structures with multiple gaskets, frictional plates and springs are used, then torque effect can be provided, but the structure becomes complicated and assembly precision requirements increase
Solution Approach 1:
The patent combines multiple separate components (gaskets, frictional plates, springs, retainer rings, retainer plates) into a single integrated fixing unit with a C-shaped cross section. This fixing unit includes a first section, second section, and connection section that collectively provide the torque effect while simplifying the overall structure and reducing assembly complexity.
Solution Approach 2:
The fixing unit serves multiple functions simultaneously: it provides torque effect through its elastic cantilever sections, maintains parallelism between the first and second rotary shafts, and eliminates the need for separate retainer rings and plates. This multi-functionality reduces both structural complexity and assembly precision requirements.
2Manufacturing precision
If retainer rings and retainer plates are assembled at two ends of the rotary shaft with high precision, then parallelism of rotary shafts can be maintained, but assembly difficulty and manufacturing cost increase
Solution Approach 1:
The fixing unit's elastic cantilever sections automatically maintain the parallelism between the first and second rotary shafts through their inherent elasticity and geometric design. The first and second sections deflect elastically to accommodate minor variations in shaft alignment while maintaining parallelism, eliminating the need for high-precision assembly procedures.
Solution Approach 2:
The fixing unit utilizes elastic deformation parameters to maintain parallelism. The cantilever sections are designed with specific elastic properties that allow them to deflect and compensate for dimensional variations, transforming the rigid precision requirement into a flexible elastic response that maintains parallelism without high assembly precision.
3Force
If rotary shafts are made longer to accommodate torque module assembly, then torque effect can be provided, but the structure becomes more complex and assembly more difficult
Solution Approach 1:
The fixing unit integrates the torque-providing function directly into the connection between the rotary shafts and the case, eliminating the need for separate torque modules that would require longer rotary shafts. The elastic cantilever sections of the fixing unit provide the necessary torque effect while allowing shorter rotary shafts.
4Ease of operation
If conventional pivot pin structures are used, then rotational movement can be achieved, but deflection of the pivoted end occurs under operational force
Solution Approach 1:
The fixing unit applies local elastic support at the pivoted sections of the rotary shafts. The cantilever sections are positioned to provide localized elastic counterforce at the pivoted ends, preventing deflection while allowing rotational movement. This local elastic support maintains stability where needed without restricting operational movement.
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 solution effectively minimizes deflection and maintains parallelism of rotary shafts, simplifies the assembly process, and reduces manufacturing costs by providing a torque effect through an elastic fixing mechanism, enabling smooth operation and extended lifespan by reducing wear.
Implementation Method 1
The first and second sections and the connection section are fixedly assembled with the pivoted sections of the first and second rotary shafts so as to avoid deflection of the first and second rotary shafts due to external operational force and fix the parallelism thereof
Implementation Method 2
the fixing device can keep the parallelism of the rotary shafts and minimize the possibility of deflection of one end of the rotary shaft. Also, the torque module composed of the gaskets, the frictional plates and the springs is removed. The fixing/control device itself can provide torque effect
Data Source
AI summary
A parallelism control device applied to dual-shaft system for fixing the parallelism of the rotary shafts and facilitating the assembling process. The device includes an assembly of a first and a second rotary shafts and a fixing unit capable of providing torque effect. Each of the first and second rotary shafts has a fixed section and a pivoted section mounted on an electronic apparatus. The fixing unit has a substantially C-shaped cross section and includes a first and a second sections, a connection section in connection with the first and second sections and a split between the first and second sections. The first and second sections and the connection section are fixedly assembled with the pivoted sections of the first and second rotary shafts so as to avoid deflection of the first and second rotary shafts and fix the parallelism thereof.