Single-Motor Coaxial Helicopter Power Assembly
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Solution Overview
Problem
The existing power supply systems for coaxial twin propeller model helicopters are complex and costly due to the need for two motors and two main gears to drive both the twin propeller and tail rotation assemblies, making them difficult to assemble and maintain.
Innovation Solution
A power assembly that uses a single motor and gear system, including a motor assembly with a fuel tank, a main gear, a synchronous belt gear, and a belt pulley, to drive both the twin propeller and tail rotation assemblies synchronously, simplifying the structure and assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a dual motor and dual main gear system is used to drive both twin propeller and tail rotation assemblies, then the driving capability is sufficient, but the structure becomes complex and manufacturing costs increase
Solution Approach 1:
The patent merges the functions of two separate motor-gear systems into a single integrated motor-gear assembly. One motor with a differentially arranged gear system (including first and second main gears with different tooth counts) simultaneously drives both the twin propeller rotation assembly and the tail rotation assembly, reducing component count while maintaining sufficient driving capability for both functions
Solution Approach 2:
The single motor-gear assembly is designed with universal functionality to perform multiple driving tasks. The motor can drive the twin propeller rotation assembly during normal flight operations and simultaneously or alternatively drive the tail rotation assembly for directional control, making the system multi-functional without requiring separate dedicated motors for each function
2Power
If a dual motor and dual main gear system is used, then both assemblies can be driven, but assembly and maintenance difficulty increases
Solution Approach 1:
By combining two separate motor-gear systems into one integrated assembly, the number of assembly steps is reduced. The single motor connects to both first and second main gears through a unified transmission structure, eliminating the need to separately assemble and align two independent motor-gear systems, thereby significantly improving assembly ease
Solution Approach 2:
The gear system is segmented into first and second main gears with different tooth counts, each engaged with the motor through a common transmission mechanism. This segmentation allows independent optimization of each gear's function while maintaining a unified assembly structure that is easier to assemble and maintain compared to two completely separate systems
3Power
If a dual motor and dual main gear system is used, then both assemblies can be driven, but manufacturing and maintenance costs increase
Solution Approach 1:
Merging two separate motor-gear systems into one integrated assembly reduces the total number of components that need to be manufactured, inventoried, and assembled. The single motor and unified gear structure reduce manufacturing complexity and material costs, leading to lower production costs while maintaining the capability to drive both twin propeller and tail rotation assemblies
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 solution enables stable and synchronous operation of the twin propeller and tail rotation assemblies with a single motor, improving flight stability and reducing manufacturing and maintenance costs by eliminating the need for a dual motor and gear system.
Implementation Method 1
a synchronous belt gear (25), said main gear (22) connected to said main rotation assembly (1a) of said twin propeller rotation assembly (1), a lower part of said main gear (22) connected to said synchronous belt gear (25)
Implementation Method 2
an upper end of said belt pulley (23) connected to said tail rotation assembly (7), a middle part of said belt pulley (23) engaged said main gear (22), a lower end of said belt pulley (23) connected to said synchronous belt gear (25)
Data Source
AI summary
A coaxial twin propeller model helicopter comprises a power assembly, a twin propeller rotation assembly, a tail rotation assembly, a motor assembly and a gear assembly. The twin propeller rotation assembly comprises a main rotation assembly and a minor rotation assembly. The power assembly comprises a motor assembly having a motor, a motor gear, and a fuel tank and a gear assembly having a main gear, a synchronous belt gear and a belt pulley. The main gear is engaged with the motor gear, and connected to the main rotation assembly. A lower part of the main gear is connected to the synchronous belt gear which connects to said minor rotation assembly. An upper end of the belt pulley is connected to said tail rotation assembly. A middle part of the belt pulley is engaged with the main gear. A lower end of the belt pulley is connected to the synchronous belt gear.