Synthetic Resin Rotation Induction Device for Vehicle Steering
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Solution Overview
Problem
The existing rotation induction devices for vehicles face challenges with smooth steering operations due to fatigue damage from minute shaking and vibration loads on ball or needle rolling bearings used in suspension systems, leading to reduced operability.
Innovation Solution
A rotation induction device utilizing synthetic resin materials for the upper and lower case members and a center plate, with an inflow prevention part to block foreign matter entry and a push prevention part to manage horizontal loads, enhancing the durability and operational stability of the bearing system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rolling bearing using ball or needle is applied, then rotational support is provided, but fatigue damage occurs due to minute shaking and vibration load
Solution Approach 1:
The patent replaces the rolling bearing (mechanical system with balls or needles) with a synthetic resin bearing that uses sliding friction instead of rolling motion. This substitution eliminates the fatigue damage caused by repeated rolling contacts under vibration loads, while maintaining the rotational support function through the self-lubricating properties of the synthetic resin material.
Solution Approach 2:
The patent employs synthetic resin as a composite material for the bearing, which combines multiple material properties (self-lubrication, vibration damping, fatigue resistance) into a single component. This composite material approach allows the bearing to withstand minute shaking and vibration loads without the fatigue damage that plagues traditional rolling bearings, while maintaining reliability.
2Reliability
If synthetic resin material is used for case members and center plate, then foreign matter ingress is prevented and operational stability is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the bearing function with the case members and center plate by manufacturing them as integrated synthetic resin components. This consolidation eliminates gaps and interfaces where foreign matter could enter, enhancing operational stability. The injection molding process used for these composite components achieves complex geometries in a single manufacturing step, offsetting the apparent complexity through process efficiency.
Solution Approach 2:
The patent changes the material parameter from traditional metals to synthetic resin, which fundamentally alters the manufacturing approach. The synthetic resin allows for injection molding of complex integrated structures that would be difficult to assemble from separate metal parts. This parameter change transforms manufacturing complexity from multi-step assembly to single-step molding, while simultaneously preventing foreign matter ingress through the seamless integrated design.
Data Source
AI summary
A rotation induction device for a vehicle, includes an upper case member, a lower case member, a center plate, and an inflow prevention part. The upper case member has a piston rod disposed therethrough. The lower case member, disposed under the upper case member, has the piston rod disposed therethrough. The center plate, disposed between the upper and lower case members such that the piston rod passes through the center plate, is configured to induce either one or both of the upper and lower case members to rotate. The inflow prevention part, formed in the upper and lower case members, is configured to block the inflow of foreign matters. Each of the upper case member, the lower case member, and the center plate is composed of a synthetic resin material.