Fiber-Reinforced Resin Gear Assembly for High-Temperature Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Resin gears in gear devices experience reduced durability at high temperatures due to decreased stiffness, and using fiber-reinforced resin to address this issue increases costs, as both the resin gear and connected member having the same fiber content ratios leads to inevitable deterioration in durability.
Innovation Solution
The gear device employs a resin gear with a lower fiber content ratio of reinforcement fibers compared to the connected member, allowing for reduced use of reinforcement fibers in the resin gear while maintaining higher stiffness in the connected member, thereby reducing overall costs and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fiber-reinforced resin is used to increase stiffness at high temperature, then durability is improved, but cost increases
Solution Approach 1:
The patent applies different fiber content ratios to different components: the resin gear uses a lower fiber content ratio (5-30%) while the connected member uses a higher fiber content ratio (30-60%). This local differentiation allows the connected member to provide structural stiffness and support at high temperature, while the gear maintains adequate performance at lower cost.
Solution Approach 2:
The patent uses fiber-reinforced resin materials with different fiber content ratios for different components. The first resin material (gear) has lower fiber content while the second resin material (connected member) has higher fiber content, creating a composite material system that optimizes both cost and durability.
2Reliability
If fiber content ratio is increased to maintain stiffness at high temperature, then durability is improved, but the amount of reinforcement fibers increases leading to higher cost
Solution Approach 1:
Different components are assigned different fiber content ratios based on their functional requirements. The connected member, which provides structural support, receives higher fiber content (30-60%), while the gear, which has specific mechanical requirements, uses lower fiber content (5-30%). This reduces the total amount of expensive reinforcement fibers while maintaining system durability.
Solution Approach 2:
Instead of uniformly high fiber content throughout the entire gear device, the patent applies fiber reinforcement partially and selectively - sufficient fiber content is provided only where structurally necessary (connected member), while reducing fiber content in areas where it is less critical (gear), thereby optimizing material usage.
Data Source
AI summary
A gear device includes a resin gear that is formed of a first resin material, and a connected member that is formed of a second resin material and that is connected to the resin gear, in which the first resin material is a fiber-reinforced resin obtained by filling a first base material resin with first reinforcement fibers, the second resin material is a fiber-reinforced resin obtained by filling a second base material resin with second reinforcement fibers, and a fiber content ratio of the second reinforcement fibers in the second resin material is higher than a fiber content ratio of the first reinforcement fibers in the first resin material.