Reinforced Polymer Nuts for High-Torque Socket Loading
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Solution Overview
Problem
Existing socket loading solutions using PEEK nuts are weak and prone to cracking under increasing mechanical loads, which can lead to unreliable electrical connectivity and require larger nut sizes that reduce available space for other components.
Innovation Solution
Reinforced nuts with a metal casing or embedded sleeve to enhance strength, allowing for thinner designs that can withstand higher torque without cracking, while maintaining low residue and high installation cycle counts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PEEK nuts are used for socket loading, then the nuts leave little or no residue and can satisfy high installation cycle count requirements, but the nuts are weaker and prone to cracking under increasing mechanical loads
Solution Approach 1:
The patent applies composite materials by combining PEEK polymer with embedded reinforcement structures (metal sleeves, glass fibers, or carbon fibers). This creates a hybrid material system where the polymer provides residue-free installation and cycle count reliability, while the embedded reinforcement provides the additional strength and crack resistance needed for modern high-load socket applications.
2Strength
If the size of the nuts is increased to increase nut strength, then the nuts can handle higher loads, but the footprint increases which reduces the available footprint for other load assembly components
Solution Approach 1:
By embedding high-strength reinforcement structures within the PEEK nut body, the patent achieves enhanced strength without increasing the external dimensions. The reinforcement elements (metal sleeves, fibers) are integrated within the existing nut geometry, allowing the same footprint to support higher loads through improved material properties rather than increased size.
3Reliability
If more torque is applied to PEEK nuts to secure the load assembly, then the mechanical load is better secured, but the PEEK nuts can crack in half
Solution Approach 1:
The embedded metal sleeves or fiber reinforcements act as crack arrestors within the PEEK matrix. When torque is applied during installation, these reinforcement structures prevent crack propagation through the polymer body, allowing higher installation torques to be applied without causing catastrophic failure, thus improving both load securing and crack resistance simultaneously.
Data Source
AI summary
Reinforced nuts comprise a polymer nut body and a metal casing fitted to an outer surface of the nut body. In some embodiments, the metal casing can cover the top of the polymer nut body and comprise a drive opening so that the casing carries a portion of an applied torque when the nut is being tightened. In other embodiments, the metal case can cover a portion of the bottom surface of the polymer nut body. Reinforced nuts can also comprise a cylindrical metal sleeve that is embedded in a polymer nut body. The metal sleeve can be solid, porous, comprise holes, or be a mesh. The reinforced nuts have an increased strength relative to nuts that are not reinforced and can thus handle a greater load when they nuts are being tightened.