Superposition Transmission Differential Gear Balancing
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Solution Overview
Problem
Existing industrial drive systems with planetary gear stages lack cost-effective safety measures to handle tolerance-related and misalignment-related forces, and they are limited in achieving variable high transmission ratios.
Innovation Solution
A geared motor assembly with a balancing mechanism and differential gear mechanism that uses a superposition gear to combine power flows from multiple drives, allowing for variable high transmission ratios and even power distribution to planet wheels, incorporating stepped planetary gears and a central wheel for enhanced mounting and bearing support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a planetary gear mechanism with constant translation is used in industrial drives, then high power transmission is achieved, but the system lacks safety measures to handle tolerance-related and misalignment-related forces
Solution Approach 1:
The patent applies the dynamics principle by introducing a balancing mechanism that allows the central wheel to move dynamically within the planetary gear set. This movement compensates for tolerance-related and misalignment-related forces, enhancing system reliability without requiring a completely complex redesign of the entire transmission system
Solution Approach 2:
The balancing mechanism acts as an intermediary element between the central wheel and the planetary gears. It mediates the forces generated by tolerances and misalignments, distributing them in a way that protects the main power transmission components while adding only moderate complexity to the system
2Adaptability or versatility
If a differential gear mechanism with balancing mechanism is used, then variable high transmission ratios are achieved, but the device complexity increases
Solution Approach 1:
The differential gear mechanism serves multiple functions: it provides variable transmission ratios, balances forces from tolerances and misalignments, and distributes power evenly to planet wheels. This multi-functionality achieves adaptability while managing complexity by combining several benefits in one integrated mechanism
Solution Approach 2:
The planetary gear set is segmented into multiple planet wheels that independently engage with the central wheel. This segmentation allows each planet wheel to handle specific loads and enables the system to achieve variable transmission ratios through different engagement configurations, reducing the complexity of achieving versatility
3Strength
If power is distributed to multiple planet wheels, then load distribution is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The balancing mechanism provides beforehand cushioning by pre-compensating for tolerance variations and misalignments before they affect the load distribution on planet wheels. This cushioning effect allows the system to achieve good load distribution without requiring extremely high manufacturing precision for each individual component
Data Source
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AI summary
Disclosed is a transmission (1) comprising a superimposition transmission device, in particular a differential device, by means of which torque flows can be combined via two drive shafts (3, 20) of the transmission. A first (3) of the drive shafts drives a central gear, in particular a sun gear (13), of a planetary gear train (12). Said first drive shaft (3) is freely mounted, being mounted on revolving gears (14, 15, 16) of the superimposition transmission device in a first axial region while being mounted on a drive mechanism via a shaft coupling (7) in a second axial region.