Planetary Speed-Change Mechanism for Smooth Step-Up Transmission
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Solution Overview
Problem
Existing speed changers face issues of complex structure, high maintenance costs, inefficiency in power transfer, and discontinuous speed changes, leading to unreliable performance.
Innovation Solution
A planetary speed-change mechanism with a simplified structure, utilizing a transmission module and speed-up modules with a one-way shaft assembly and planet speed-change wheel assembly, allowing direct power transfer without interruption and kinetic energy loss, enabling smooth and efficient speed changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a gear train-based speed changer is used, then power transfer efficiency is improved, but structure complexity increases and cost increases
Solution Approach 1:
The speed changer is divided into multiple independent speed-changing units, each capable of operating autonomously. This segmentation allows the system to achieve variable speed functionality without requiring a complex multi-stage gear train, thereby maintaining simplicity while preserving power transfer efficiency.
Solution Approach 2:
The invention extracts the essential speed-changing function from the complex gear train system and implements it through a simplified magnetic coupling mechanism. By removing unnecessary mechanical components and retaining only the core functional elements, the system achieves both simplicity and efficiency.
2Loss of energy
If a gear train-based speed changer is used, then power transfer efficiency is improved, but ease of service deteriorates
Solution Approach 1:
By dividing the system into modular speed-changing units with standardized interfaces, maintenance personnel can easily remove, replace, or repair individual modules without disassembling the entire system, significantly improving serviceability while maintaining power transfer efficiency.
Solution Approach 2:
The magnetic coupling mechanism enables automatic engagement and disengagement of power transmission paths, reducing the need for manual intervention during operation and maintenance, thereby improving ease of service while preserving efficient power transfer.
3Ease of operation
If a clutch-based speed changer is used, then ease of operation is improved, but structure complexity increases and size expands
Solution Approach 1:
The invention removes electrical components and control wires from the clutch assembly, extracting only the essential magnetic coupling function. This elimination of extraneous elements simplifies the structure and reduces size while maintaining ease of operation through magnetic field control.
Solution Approach 2:
The patent replaces traditional mechanical clutch mechanisms with a magnetic coupling system, substituting complex mechanical linkages and electrical controls with a simpler magnetic field-based approach that achieves the same operational ease with reduced structural complexity.
4Ease of operation
If a clutch-based speed changer is used, then ease of operation is improved, but power transfer efficiency deteriorates
Solution Approach 1:
By replacing friction-based mechanical coupling with magnetic coupling, the system eliminates kinetic energy loss associated with friction while maintaining ease of operation. The magnetic field provides direct force transmission without the need for friction-based engagement.
5Productivity
If speed change is performed in a short period of time, then productivity is improved, but reliability deteriorates due to pause generation
Solution Approach 1:
The magnetic coupling mechanism enables continuous and smooth transition between different speed states without interruption or pause. The magnetic field can be gradually adjusted to maintain continuous power flow, ensuring both high productivity through rapid speed changes and reliability through smooth transitions.
Solution Approach 2:
The system dynamically adjusts the magnetic coupling strength to achieve smooth speed transitions. By continuously varying the magnetic field intensity, the system can rapidly change speed while maintaining smooth operation without pauses, thereby improving both productivity and reliability.
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 mechanism simplifies structure and maintenance, reduces costs, ensures efficient power transfer, and eliminates pauses during speed changes, enhancing reliability and smoothness.
Implementation Method 1
the force of a clutch is generally provided by magnetic forces of electromagnetism and coupling of a stationary part and a rotating part is achieved with friction
Data Source
AI summary
A speed-change mechanism includes an output shaft on which a transmission module and a speed step-up module are mounted. The transmission module includes a driving roller that drives the output shaft in a single direction. The speed step-up module includes a connecting gear and a speed step-up gear that are rotatably and fixedly mounted to the output shaft, respectively, and a planet speed-change wheel assembly arranged therebetween. The speed step-up module includes an arrestor assembly. At a low speed, the planet speed-change wheel assembly is idling as being set in an orbiting motion and input power is suppled through the driving roller driving the output shaft in the single direction; and at a high speed, the arrestor assembly stops the orbiting motion of the planet speed-change wheel assembly to allow the speed-change gear of the planet speed-change wheel assembly to switch to a spinning motion to step up the speed.