Epicyclic Gear Assembly for Compact Multi-Output Torque Transfer
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Solution Overview
Problem
Conventional multi-branch gear designs that do not rotate about a common central axis are costly, heavy, and occupy valuable space in systems where they are deployed, limiting their effectiveness and efficiency.
Innovation Solution
An epicyclic gear mechanism with a primary differential assembly that selectively drives fore and aft secondary differential assemblies, each of which can drive multiple interfaces, all rotating about a common central axis, utilizing sun gears and planet gears to transmit torque and featuring actuators for selective interface activation or deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional multi-branch gear designs are used, then power can be transmitted to multiple outputs, but the system becomes costly, heavy, and occupies valuable space
Solution Approach 1:
The patent merges multiple gear train branches into a single integrated epicyclic gear mechanism that rotates about a common central axis. The primary differential assembly drives multiple secondary differential assemblies through shared planet gears and sun gears, combining what would traditionally be separate gear trains into one compact unit. This merging eliminates redundant components and reduces overall system weight while maintaining the capability to transmit power to multiple outputs.
Solution Approach 2:
The epicyclic gear mechanism is designed as a universal power transmission system where the primary differential assembly can selectively drive multiple secondary differential assemblies through a common planet gear set. The sun gears and planet gears serve multiple functions simultaneously - transmitting power to different branches, providing differential motion distribution, and enabling selective engagement of various output interfaces. This multi-functionality reduces the need for separate dedicated gear trains for each output.
2Adaptability or versatility
If conventional multi-branch gear designs are used, then power can be transmitted to multiple outputs, but the system becomes costly and complex
Solution Approach 1:
The patent merges multiple gear train branches into a single integrated epicyclic gear mechanism that rotates about a common central axis. The primary differential assembly drives multiple secondary differential assemblies through shared planet gears and sun gears, combining what would traditionally be separate gear trains into one compact unit. This merging eliminates redundant components and reduces overall system weight while maintaining the capability to transmit power to multiple outputs.
Solution Approach 2:
The gear mechanism is segmented into modular differential assemblies (primary and secondary) that can independently engage different output interfaces. Each secondary differential assembly can selectively drive different fore or aft interfaces, allowing the system to be configured for different power distribution scenarios without redesigning the entire mechanism. This segmentation provides versatility while maintaining structural simplicity.
3Adaptability or versatility
If conventional multi-branch gear designs are used, then power can be transmitted to multiple outputs, but valuable space is occupied
Solution Approach 1:
The patent merges multiple gear train branches into a single integrated epicyclic gear mechanism that rotates about a common central axis. The primary differential assembly drives multiple secondary differential assemblies through shared planet gears and sun gears, combining what would traditionally be separate gear trains into one compact unit. This merging eliminates redundant components and reduces overall system weight while maintaining the capability to transmit power to multiple outputs.
Solution Approach 2:
The epicyclic gear mechanism employs a nested arrangement where planet gears rotate about sun gears, and secondary differential assemblies are positioned within the structure of the primary differential assembly. All components are arranged concentrically about a common central axis, with planet gears nested within the annulus and secondary differentials integrated into the planet carrier structure. This nesting achieves maximum compactness and minimizes the volume occupied by the power transmission system.
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 compact design reduces bulk and weight, enabling efficient power transmission to multiple outputs while minimizing the number of bearings, making it suitable for constricted spaces and providing versatile placement options.
Implementation Method 1
An epicyclic gear mechanism includes a primary differential assembly to selectively drive a fore secondary differential assembly and an aft secondary differential assembly
Implementation Method 2
The primary differential assembly drives the fore secondary differential assembly via a first sun gear, and drives the aft secondary differential assembly via a second sun gear
Data Source
AI summary
Methods and systems for an epicyclic gear mechanism that includes a primary differential assembly to selectively drive the fore secondary differential assembly and the aft secondary differential assembly. The fore secondary differential assembly selectively drives one or more fore interfaces (e.g., output gears), whereas the aft secondary differential assembly selectively drives one or more aft interfaces (e.g., output gears). Each of the primary differential assembly, the fore and aft secondary differential assemblies, and the interfaces rotate about a common central axis. The primary differential assembly drives the fore secondary differential assembly via a first sun gear, and drives the aft secondary differential assembly via a second sun gear, both of which rotate about the common central axis. Further, one or more actuators are to activate or deactivate in order to drive or be driven by a selected interface.