Gearbox Cooling Chamber Layout for Lubricating Oil Heat Control
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Solution Overview
Problem
Existing power transmission devices face challenges in enhancing the cooling efficiency of lubricating oil for their constituent components, which affects the overall performance and reliability of the system.
Innovation Solution
A power transmission device design that incorporates a cooling chamber adjacent to the gear chamber, where cooling liquid is introduced to chill the support wall partitioning both chambers, effectively increasing the cooling efficiency of the lubricating oil by utilizing the same cooling liquid used for the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a separate cooling system is provided for the gear mechanism, then the cooling efficiency of the oil is improved, but the device complexity and space occupation increase
Solution Approach 1:
The patent merges the motor cooling system and gear mechanism cooling system into a single integrated cooling chamber. The cooling liquid flows through both the motor and the gear mechanism sequentially within the same chamber, eliminating the need for separate cooling systems while maintaining effective cooling for both components.
Solution Approach 2:
The cooling chamber is designed to serve multiple functions: it cools both the motor and the gear mechanism simultaneously. The cooling liquid circulation system performs dual cooling tasks within a single system, reducing overall system complexity while improving oil cooling efficiency for the gear mechanism.
2Temperature
If the cooling chamber volume is increased to improve oil cooling efficiency, then the cooling performance is enhanced, but the device occupies more space
Solution Approach 1:
By combining the motor cooling and gear mechanism cooling functions into a single cooling chamber, the patent maximizes the utilization of the cooling liquid flow path. The cooling chamber volume is optimized to serve both purposes simultaneously, avoiding the need for two separate chambers and thus reducing the total space occupation while maintaining effective cooling performance.
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
This configuration enhances the cooling efficiency of the oil, improving the lubrication and performance of the planetary reduction gear and differential mechanism while maintaining a compact device design.
Implementation Method 1
a cooling chamber CR in which the cooling liquid CL is introduced is formed in the fourth box 14 adjacent to the gear chamber Sb
Data Source
AI summary
A power transmission device includes a motor, a gear mechanism connected downstream of the motor and lubricated by oil, and a box. The box has a wall part that covers an outer circumference of the gear mechanism, and a jacket part that covers an outer circumference of the wall part. A cooling chamber, in which cooling liquid is introduced, is formed between the wall part and the jacket part. The cooling chamber includes a portion that overlaps with the gear mechanism when seen from a radial direction, and a portion that overlaps the gear mechanism when seen from an axial direction.