Driving System Oil Circulation Structure for Motor and Reducer
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Solution Overview
Problem
Eco-friendly vehicle technologies, such as hybrid and electric vehicles, face challenges in maintaining a compact cooling and lubrication system due to complex cooling structures for motors and speed reducers, which complicates manufacturing and increases size.
Innovation Solution
A driving system with an oil circulation structure that includes interconnected housings, valves, and a controller to manage oil flow and level, allowing for efficient distribution and recirculation of oil based on the operational state of the driving structures, ensuring effective cooling and lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate cooling structures are provided for motor and speed reducer, then cooling effectiveness is improved, but device complexity and overall size increase
Solution Approach 1:
The patent combines the cooling structures for the motor and speed reducer into a single integrated system. The housing contains a unified cooling chamber where cooling fluid circulates through both the motor and speed reducer components, eliminating the need for separate cooling systems while maintaining effective cooling for both components.
Solution Approach 2:
The cooling fluid circulation system serves multiple functions simultaneously: it cools the motor, cools the speed reducer, and provides lubrication. The single cooling structure performs multiple thermal management tasks that would traditionally require separate systems, thereby reducing overall device complexity.
2Temperature
If separate cooling structures are provided for motor and speed reducer, then cooling effectiveness is improved, but overall size increases
Solution Approach 1:
The patent merges the cooling structures for the motor and speed reducer into a single integrated system. The housing contains a unified cooling chamber where cooling fluid circulates through both the motor and speed reducer components, eliminating the need for separate cooling systems while maintaining effective cooling for both components.
Solution Approach 2:
The speed reducer is positioned within or adjacent to the motor housing, allowing the cooling structure to serve both components in a nested arrangement. The cooling fluid pathways are integrated into the existing motor housing structure, effectively nesting the cooling function within the motor's structural envelope.
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 system enhances cooling and lubrication efficiency by dynamically adjusting oil distribution and recirculation, improving performance and reducing the overall size and complexity of the apparatus.
Implementation Method 1
there are provided an oil pump, which is mounted on the outer surface of the motor housing and is disposed coaxially with the shaft, a cooling oil supply line, which extends from an outlet of the oil pump to the inner surface of the spider, and a cooling oil return line, which connects the bottom surface of the motor housing, which is filled with a cooling oil, to an inlet of the oil pump
Implementation Method 2
a cooling oil supply line, which extends from an outlet of the oil pump to the inner surface of the spider
Implementation Method 3
a cooling oil return line, which connects the bottom surface of the motor housing, which is filled with a cooling oil, to an inlet of the oil pump
Implementation Method 4
oil for cooling and lubrication automatically circulates upon operation of a driving structure
Data Source
AI summary
Disclosed is a driving system having an oil circulation structure in which churned oil is collected in a housing and in which the collected oil is efficiently distributed to driving structures, which include a motor and a speed reducer, thereby smoothly cooling and lubricating the respective driving structures. In addition, it is possible to adjust the level of the oil depending on whether the driving structures are in a low-load state or a high-load state, thereby improving lubrication and cooling performance.