Synthetic Resin Rotation Induction Device for Vehicle Steering

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Solution Overview

Problem

Conventional vehicle suspension systems using rolling bearings with balls or needles face fatigue damage from vibrations, leading to reduced smoothness in steering operations.

Innovation Solution

A rotation induction device comprising synthetic resin components with a friction reduction part, load reduction part, and specific structural features to minimize friction and maintain smooth operation, including a center plate that induces rotation and polytetrafluoroethylene for friction reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a rolling bearing with balls or needles is used, then the initial smoothness of steering operation is achieved, but the bearing becomes fatigue-damaged by vibrations over time

Engineering Contradiction:

Improvesmoothness of steering operationVSAvoidresistance to fatigue damage

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces the rolling bearing mechanical system with a synthetic resin bearing system that uses friction reduction parts (polytetrafluoroethylene coating or spherical structure) to reduce friction. This substitution eliminates the balls or needles that are susceptible to fatigue damage from vibrations, while maintaining smooth steering operation through the low-friction properties of the synthetic resin material and friction reduction mechanisms.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs composite material construction by combining synthetic resin (for the bearing body) with polytetrafluoroethylene coating or spherical friction reduction parts. This composite approach leverages the vibration resistance of synthetic resin and the low-friction properties of polytetrafluoroethylene to achieve both reliability and ease of operation simultaneously.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a synthetic resin bearing is used, then resistance to vibration and fatigue damage is improved, but friction increases compared to rolling bearings

Engineering Contradiction:

Improveresistance to vibration and fatigue damageVSAvoidfriction levels

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the high-friction synthetic resin-on-synthetic resin contact with a low-friction interface by applying polytetrafluoroethylene coating to the contact surfaces or by incorporating spherical friction reduction parts. This substitution maintains the vibration resistance of synthetic resin while reducing friction to levels suitable for smooth steering operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the friction parameter of the synthetic resin bearing by applying polytetrafluoroethylene coating or incorporating spherical structures. This parameter change reduces the coefficient of friction between contacting surfaces, enabling smooth operation while retaining the inherent vibration resistance of the synthetic resin material.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If traditional bearing materials are used, then initial friction is low, but internal deformation occurs over time reducing longevity

Engineering Contradiction:

Improveinitial friction levelsVSAvoidlongevity of suspension system

Core Design Contradiction:

Ease of operationVSDuration of action of stationary object

Solution Approach 1:

The patent uses composite material construction combining synthetic resin with polytetrafluoroethylene coating or spherical friction reduction parts. This composite structure prevents internal deformation by distributing stresses more evenly and reducing friction-induced heat and wear, thereby extending the service life of the suspension system while maintaining low initial friction for smooth operation.

Inventive Principle:

Principle #40Composite materials

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 enhances the longevity of the suspension system by reducing friction and preventing internal deformation, ensuring smooth and stable steering performance over time.

Implementation Method 1

a friction reduction part, configured to reduce friction, is selectively disposed at a contact surface between the upper case member and the center plate, and a contact surface between the center plate and the lower case member

Methodology Applied

Scientific EffectFriction reduction: Lubrication

Data Source

PatentUS11597247B2Rotation induction device for vehicle

Publication Date: 2023.03.07 HYUNDAI MOBIS CO LTD

AI summary

A rotation induction device for a vehicle includes an upper case member, a lower case member, a center plate, and a friction reduction 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 friction reduction part, configured to reduce friction, is selectively disposed at a contact surface between the upper case member and the center plate, and a contact surface between the center plate and the lower case member. Each of the upper case member, the lower case member, and the center plate is composed of a synthetic resin material.