Perpendicular Speed Reducer Casing Cooling With Fins and Airflow Grooves
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Solution Overview
Problem
Existing perpendicular speed reducers have complex configurations for cooling due to heat generation in gear meshing and bearing areas, particularly when ambient temperatures are high.
Innovation Solution
A perpendicular speed reducer design featuring a casing with fins and groove portions that utilize airflow to cool the bearing areas, simplifying the cooling mechanism by integrating the cooling components into a single, vertically formed casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a circulation device is provided to cool the casing by fetching and cooling lubricant, then the casing can be cooled, but the device configuration becomes complicated
Solution Approach 1:
The cooling function is merged with the casing structure itself by integrating fins directly into the casing body. The fins act as heat dissipation elements that are structurally combined with the casing, eliminating the need for separate circulation devices while achieving effective cooling through direct thermal coupling with the heat-generating components.
Solution Approach 2:
The casing cools itself through the integrated fin structure that directly contacts the bearing and gear meshing areas. The heat is dissipated passively through the fins without requiring external active cooling systems, lubricant circulation pumps, or complex thermal management components.
2Loss of energy
If the casing is cooled using a lubricant circulation system, then heat removal is achieved, but the system requires additional components and maintenance
Solution Approach 1:
The lubricant circulation system is extracted and replaced with a passive thermal dissipation structure. The fins are directly attached to the casing regions that generate heat, allowing thermal energy to be extracted and dissipated to the surrounding environment without requiring fluid circulation infrastructure.
Solution Approach 2:
The mechanical lubricant circulation system is replaced with a passive thermal conduction and convection system. The fins utilize natural heat transfer mechanisms (conduction from the casing, convection to the surrounding air) to replace the mechanical pump-and-pipe system that would be required for active lubricant circulation cooling.
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 design effectively cools the casing with a simpler configuration, improving heat removal from bearing areas and gear meshing portions using airflow, reducing the need for complex lubricant circulation systems.
Implementation Method 1
a fin (544) provided along a direction toward the bearing hole
Implementation Method 2
The plurality of groove portions (551) are provided along an axial direction of an output shaft (40) on a second side surface (55) adjacent to the lower surface (54)
Implementation Method 3
The plurality of groove portions (551) are provided along an axial direction of an output shaft (40) on a second side surface (55) adjacent to the lower surface (54)
Data Source
AI summary
There is provided a perpendicular speed reducer including an input shaft, a reduction mechanism that reduces a speed of rotation of the input shaft, an output shaft that outputs the speed-reduced rotation, and a casing that accommodates the reduction mechanism. The input shaft and the output shaft are perpendicular to each other. The casing includes a bearing hole formed on a first side surface to support the output shaft, a fin provided along a direction toward the bearing hole, and a groove portion provided along an axial direction of the output shaft on a second side surface adjacent to the first side surface.