Gear-Driven Lubrication Passage for Compact Vehicle Transmissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle transmission systems are not spatially intensive and structurally simple, leading to increased weight due to the need for additional components like a pump apparatus for lubrication and cooling.
Innovation Solution
A transmission system with a housing containing a reducer and motor, featuring a sealed fluid passage that uses the rotation of the first gear to pump lubricating medium to the motor shaft, eliminating the need for a separate pump and integrating lubrication and cooling functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pump apparatus is added to actively convey lubricating medium to the motor, then the lubrication and cooling efficiency is improved, but the device complexity and overall weight increase
Solution Approach 1:
The patent combines the lubrication system and cooling system into a single integrated system. The lubricating medium serves dual purposes: lubricating the reducer gears and cooling the motor. The fluid passage integrates both functions, eliminating the need for separate pump apparatus for each system.
Solution Approach 2:
The rotating first gear in the reducer serves as a self-powered pump, using its own rotational motion to convey the lubricating medium through the fluid passage to the motor. This eliminates the need for an additional dedicated pump apparatus, reducing device complexity while maintaining active conveyance capability.
2Reliability
If a pump apparatus is added to actively convey lubricating medium to the motor, then the lubrication and cooling efficiency is improved, but the overall weight increases
Solution Approach 1:
The first gear uses its own rotational motion to pump the lubricating medium, eliminating the need for a separate pump apparatus. This self-service mechanism reduces the overall weight of the transmission system while maintaining active lubricant conveyance to the motor for effective cooling.
3Quantity of substance
If the fluid passage inlet is positioned to face the first gear, then the lubricating medium collection efficiency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The fluid passage inlet is asymmetrically positioned to face the first gear, optimizing the collection of lubricating medium flung out by the rotating gear. The inlet orientation and position are specifically designed to maximize lubricant capture efficiency, with the extension line of the top wall being tangent to the housing wall surrounding the first gear.
4Device complexity
If the transmission system integrates motor and reducer with shared lubrication, then the structural simplification is improved, but the mounting space intensiveness increases
Solution Approach 1:
The motor and reducer are integrated into a single housing with a shared lubrication system. The fluid passage is formed within the housing structure itself, combining the lubrication and cooling functions in a compact arrangement that reduces overall system volume while simplifying the structure.
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 solution provides a lightweight, structurally simple, and space-efficient transmission system that actively conveys lubricating medium from the reducer to the motor, reducing material costs and overall weight while ensuring effective lubrication and cooling without additional components.
Implementation Method 1
an inlet of the fluid passage is directed to a first gear of the reducer to receive a lubricating medium transmitted from the first gear of the reducer
Implementation Method 2
a negative pressure is generated in the hollow cavity by the rotation of the motor shaft, thereby pumping the lubricating medium from the reducer to the motor via the fluid passage
Data Source
AI summary
A transmission system for a vehicle, including a housing, having a main housing and a cover part, and a reducer and a motor arranged in the housing. A lubrication system is arranged in the housing and includes a fluid passage extending between the reducer and the motor. The fluid passage extends from a first gear of the reducer to a motor shaft of the motor to guide a lubricating medium to the motor by means of the fluid passage to cool the motor.