Planetary Transmission Fluid Collecting Device Design
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Solution Overview
Problem
Existing planetary transmissions are complex and costly to produce due to the need for axial bearings and multiple fluid collecting devices, which also result in increased axial size and material usage.
Innovation Solution
A compact planetary transmission design where a single fluid collecting device divides the fluid flow into two parts, eliminating the need for axial bearings and allowing both planetary gear sets to be supplied by a single fluid line, reducing axial size and production complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each planetary gear set has its own fluid collecting device, then the planetary gear sets can be supplied with fluid independently, but the axial size increases and production becomes complicated
Solution Approach 1:
The patent combines multiple fluid collecting functions into a single fluid collecting device. This device collects fluid from the fluid line and distributes it to multiple planetary gear sets through integrated fluid outlets, eliminating the need for separate collecting devices for each gear set while maintaining reliable fluid supply to all components
Solution Approach 2:
The single fluid collecting device is designed with multi-functionality to serve multiple planetary gear sets. It includes fluid outlets positioned to supply different planetary gear sets simultaneously, making one device perform the work of multiple separate devices and simplifying both production and assembly
2Ease of operation
If axial bearings are used to divide fluid flow, then fluid can be directed to different planetary gear sets, but manufacturing complexity and production cost increase
Solution Approach 1:
The patent extracts the fluid distribution function from the axial bearing and relocates it to the fluid collecting device. The axial bearing is removed entirely, and the fluid collecting device is equipped with multiple outlets that directly distribute fluid to different planetary gear sets, eliminating the need for complex axial bearing manufacturing while maintaining fluid distribution capability
Solution Approach 2:
The fluid collecting device acts as an intermediary between the fluid line and the planetary gear sets. It receives fluid from the fluid line and redistributes it to multiple gear sets through its outlets, replacing the intermediary function previously performed by the axial bearing in a simpler, more manufacturable design
3Reliability
If multiple fluid collecting devices are provided, then each planetary gear set receives adequate fluid, but material usage increases and costs rise
Solution Approach 1:
The patent merges multiple fluid collecting devices into a single integrated device that serves multiple planetary gear sets. This consolidation reduces material consumption by eliminating redundant components while maintaining adequate fluid supply to all gear sets through strategically positioned outlets on the unified device
Data Source
AI summary
A planetary transmission includes a planetary gear set (1), another planetary gear set (2), a fluid line (3) through which fluid is flowable to the planetary gear set (1) and to the other planetary gear set (2), and a fluid collecting device (4) which is in fluid communication with the fluid line (3). The fluid collecting device (4) is connected in a rotationally fixed manner to the planetary gear set (1). The fluid collecting device (4) is configured for dividing the fluid from the fluid line (3) which has flowed into the fluid collecting device (4) into a fluid part which is flowable to the planetary gear set (1) and another fluid part which is flowable to the other planetary gear set (2).