Eccentric Oscillating Speed Reducer Cooling Passage
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Solution Overview
Problem
Eccentric oscillating type speed reducers generate heat due to excessive load, and existing countermeasures to prevent heating, such as reducing load or increasing capacity, lead to increased costs, with limited effective cooling methods, particularly in air-cooled configurations.
Innovation Solution
Incorporating a coolant passage through integrally coupled support members and a pillar portion in the speed reducer, allowing for the passage of cooling agents like water or air to effectively cool the device, specifically designed for use in spot gun robots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the speed reducer capacity is increased to handle excessive load, then the load-bearing capacity is improved, but the cost increases
Solution Approach 1:
The patent introduces a coolant passage through which cooling water flows to remove heat generated by excessive load. This hydraulic cooling system allows the speed reducer to handle higher loads without overheating, improving load-bearing capacity without increasing the overall machine capacity or cost.
2Strength
If the speed reducer capacity is increased to handle excessive load, then the load-bearing capacity is improved, but the device complexity increases
Solution Approach 1:
The coolant passage is integrated into the existing support member structure of the speed reducer. The support member is designed with a through-hole that serves as the coolant passage, merging the cooling function with the structural support function. This avoids adding separate cooling components and keeps the structure simple.
3Temperature
If air-cooling is applied to the speed reducer periphery, then cooling is provided, but the cooling effectiveness is insufficient
Solution Approach 1:
The patent replaces insufficient air-cooling with an effective water-cooling system. A coolant passage is provided through the support member, allowing cooling water to flow directly through the heat-generating area. This hydraulic cooling method provides superior heat dissipation effectiveness compared to peripheral air-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
This configuration enables efficient cooling of the speed reducer, allowing it to operate with a higher load at a lower cost compared to conventional designs, while maintaining the same capacity, and can be serially connected for multiple units.
Implementation Method 1
a coolant passage passing through the integrally coupled support members and through the pillar portion is provided
Implementation Method 2
efficient cooling of the speed reducer, allowing it to operate with a higher load at a lower cost
Data Source
AI summary
The present invention provides an eccentric oscillating type speed reducer that can more effectively be cooled with an extremely simple structure.An eccentric oscillating type speed reducer 1 includes a camshaft 11 having crank portions 11a and 11b, a plurality of externally toothed gear members 12 that respectively have holes, each of which accommodates an associated one of the crank portions, and that are eccentrically moved by rotation of the camshaft, an internally toothed gear member 13 having an inner peripheral surface in which internal teeth to be meshed with external teeth formed on external peripheral surfaces of the externally toothed gear members are formed so as to set the number of the internal teeth to be slightly larger than that of external teeth, and support members 14 respectively positioned at both ends of the externally toothed gear members so as to rotatably support both ends of the camshaft. Further, support members 18 and 19 are integrally coupled to each other via a pillar portion 17. In the eccentric oscillating type speed reducer 1, a coolant passage 30 passing through the integrally coupled support members 18 and 10, and the pillar portion 17 is provided. A coolant, such as cooling water or cooling air, is passed through the coolant passage. Consequently, the eccentric oscillating type speed reducer can efficiently be cooled.