Perpendicular Speed Reducer Cooling via Fins and Axial Grooves
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Solution Overview
Problem
Existing perpendicular speed reducers have complex configurations for cooling the casing, particularly when ambient temperatures are high, due to heat generated in gear meshing and bearing areas.
Innovation Solution
A simple configuration for cooling the casing using a fan integrated with the input shaft to blow air through fins and groove portions on the casing, guiding airflow to effectively remove heat from bearings and meshing areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a circulation device is provided to cool the casing by circulating lubricant, then the cooling effect is achieved, but the device configuration becomes complicated
Solution Approach 1:
The invention extracts the cooling function from the complex circulation device and implements it through a simplified airflow system. A fan blows air through groove portions formed in the casing, directly removing heat from the gear meshing portion and bearing without requiring lubricant circulation infrastructure
Solution Approach 2:
The invention uses pneumatic cooling by introducing airflow through groove portions in the casing. The fan generates air flow that passes through these grooves to directly cool the heat-generating components, replacing the hydraulic lubricant circulation approach with a simpler pneumatic system
2Device complexity
If a fan is provided on the input shaft to cool the casing, then the device configuration is simplified, but the airflow distribution and cooling efficiency need optimization
Solution Approach 1:
The invention applies local quality by forming groove portions at specific locations on the casing where heat generation occurs. These grooves are strategically positioned to channel airflow directly to the gear meshing portion and bearing areas, optimizing cooling efficiency at the heat source locations rather than uniform cooling
Solution Approach 2:
The invention utilizes the three-dimensional structure of the casing by forming groove portions that extend in specific directions on the casing surface. This dimensional approach allows airflow to be directed along the grooves to reach internal heat-generating components, adding a spatial dimension to the cooling path optimization
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 allows for efficient cooling of the casing without the complexity of lubricant circulation systems, using airflow to dissipate heat generated by the bearings and meshing components.
Implementation Method 1
a fan (23) provided in a tip of the input shaft (20), and a groove portion (551) provided along an axial direction of the output shaft (40) on a side surface (55) of the casing (50)... the wind of the fan (23) passes through the groove portion (551)... thereby the casing (50) can be preferably cooled
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
To preferably cool a casing with a simple configuration. A perpendicular speed reducer (1) includes an input shaft (20), a reduction mechanism that reduces a speed of rotation of the input shaft (20), an output shaft (40) that outputs the speed-reduced rotation, and a casing (50) that accommodates the reduction mechanism. The input shaft (20) and an output shaft (40) are perpendicular to each other. The casing (50) has a second bearing hole (54b) formed on a lower surface (54) to support the output shaft (40), a fin (544) provided along a direction toward the second bearing hole (54b), and a groove portion (551) provided along an axial direction of the output shaft (40) on a side surface (55) adjacent to the lower surface (54) .