Collaborative Robot Gear Motor With Low-Ratio Lightweight Reducer
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Solution Overview
Problem
Existing gear motors designed for industrial robots are not suitable for cooperating robots, as they fail to meet the distinct demands of weight saving, high efficiency, and low heat generation required for collaborative work with humans.
Innovation Solution
A gear motor configuration incorporating a motor and speed reducer with specific gravity materials lighter than iron, such as resin and aluminum, and a low reduction ratio of 30 or less, with an output rotating speed of 1000 rpm or less, to achieve weight saving and high efficiency while ensuring sufficient insulation and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gear motors designed for industrial robots are used, then durability and precision are improved, but weight increases and heat generation becomes excessive
Solution Approach 1:
The patent changes the material parameters from traditional iron-based materials to resin and aluminum materials with lower density. This parameter change reduces the weight of the gear motor while maintaining structural integrity and durability through careful selection of alternative materials that provide sufficient strength and heat resistance for cooperating robot applications.
Solution Approach 2:
The patent employs composite material construction by combining resin and aluminum materials in the gear motor assembly. The stator yoke uses resin material while the rotor and other components use aluminum materials, creating a composite structure that optimizes the balance between weight reduction and mechanical durability, specifically tailored for the lower operating conditions of cooperating robots.
2Manufacturing precision
If gear motors designed for industrial robots are used, then precision is improved, but heat generation becomes excessive
Solution Approach 1:
The patent changes the thermal parameters by substituting iron-based materials with resin and aluminum materials that have different thermal properties. These materials generate less heat under the lower operating conditions of cooperating robots (20% ED or less operation ratio), effectively reducing heat generation while maintaining sufficient precision for collaborative work requirements.
3Force
If high reduction ratio speed reducers are used, then output torque is improved, but weight increases
Solution Approach 1:
The patent changes the material density parameter by using resin and aluminum materials instead of traditional iron-based materials in the speed reducer components. This material substitution reduces the weight of the speed reducer while maintaining the necessary output torque through optimized gear design and material strength selection, achieving a lighter overall drive system suitable for cooperating robots.
Data Source
AI summary
A gear motor includes a motor and a speed reducer and drives a joint portion of a cooperating robot which performs a work in collaboration with a person. In addition, in the gear motor, an operation ratio is 20% ED or less, a reduction ratio of the speed reducer is 30 or less, and an output rotating speed of the motor is 1000 rpm or less.