Vehicle Rotation Induction Device Synthetic Resin Bearing
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Solution Overview
Problem
Rolling bearings used in vehicle suspension systems experience fatigue due to vibration loads, leading to difficulties in maintaining smooth steering operations.
Innovation Solution
A rotation induction device comprising an upper and lower case with a center plate, position guide parts, and lubricant retention features, made of synthetic resin, which guides and supports the piston rod to reduce friction and prevent foreign matter ingress, thereby enhancing operational stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rolling bearing using balls or needles is used, then the bearing can support the strut assembly rotation, but fatigue fraction occurs in the balls or needles due to vibration loads, making it difficult to maintain smooth steering operation
Solution Approach 1:
The patent replaces the traditional rolling bearing (mechanical system with balls or needles) with a synthetic resin bearing that uses a different mechanical principle - a self-lubricating polymer material with embedded lubricant reservoirs. This substitution eliminates the fatigue fraction problem of metal balls or needles while maintaining the rotation support function, directly resolving the contradiction between steering smoothness and component durability
Solution Approach 2:
The patent changes the material parameter from metal (balls or needles) to synthetic resin with self-lubricating properties. The synthetic resin material has different mechanical properties including vibration damping characteristics and fatigue resistance, which prevents the fatigue fraction that occurs in metal rolling elements under vibration loads, thereby improving both reliability and strength
2Duration of action of stationary object
If a synthetic resin bearing is used to eliminate fatigue fraction, then component durability is improved, but the bearing may allow foreign matter ingress and lubricant loss
Solution Approach 1:
The patent embeds lubricant reservoirs within the synthetic resin bearing structure itself. The lubricant is nested inside the bearing material, creating an internal supply system that prevents lubricant loss while the bearing operates. This nested structure ensures continuous lubrication without external lubricant supply lines that could be sources of contamination
Solution Approach 2:
The synthetic resin bearing acts as a flexible, self-sealing shell that prevents foreign matter ingress. The elastomeric material can deform to seal gaps and prevent contamination from entering the bearing interface, while still allowing the necessary rotational movement. This flexible sealing property protects against foreign matter contamination without requiring additional seals
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 device effectively reduces rotational friction and prevents damage from foreign matter accumulation, improving the durability and lubrication performance of the suspension system.
Implementation Method 1
a center plate disposed between the upper case and the lower case such that the piston rod passes through the center plate, and configured to induce rotation of one or both of the upper case and the lower case
Data Source
AI summary
A rotation induction device for a vehicle includes: an upper case having a piston rod disposed therethrough; a lower case disposed adjacent to the upper case and having the piston rod disposed therethrough; a center plate disposed between the upper case and the lower case such that the piston rod passes through the center plate, to induce rotation of one or both of the upper case and the lower case; and a position guide part formed on one or both of the upper case and the lower case, to guide a position of the center plate.