Leaf Spring Suspension With Integrated Damper Bushes

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Solution Overview

Problem

Conventional vehicle suspensions using coil springs require numerous parts, increasing weight and reducing interior space due to the need for separate shock absorber mounting, which complicates assembly and affects ride comfort and fuel efficiency.

Innovation Solution

A suspension system incorporating a center leaf spring and side leaf springs with integrated damper bushes, made of Glass Fiber Reinforced Plastic and aluminum, which absorb shock without a separate shock absorber, reducing the number of parts and assembly complexity while using silicon oil and elastically deformable materials for efficient damping.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional suspension using coil spring and separate shock absorber is used, then the shock absorption function is achieved, but the number of parts increases and assembly complexity increases

Engineering Contradiction:

Improveshock absorption functionVSAvoidnumber of parts

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the shock absorber function with the leaf spring by integrating a damper bush into the mounting bracket that connects the leaf spring to the vehicle body. This merging of functions reduces the number of separate components while maintaining both the suspension and shock absorption capabilities.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mounting bracket is designed to serve multiple functions: it connects the leaf spring to the vehicle body, provides mounting points for the damper bush, and integrates the shock absorption function. This multi-functionality eliminates the need for separate shock absorber components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If a conventional suspension using coil spring and separate shock absorber is used, then the shock absorption function is achieved, but the vehicle weight increases

Engineering Contradiction:

Improveshock absorption functionVSAvoidvehicle weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

By merging the shock absorber function into the leaf spring assembly through the integrated damper bush, the patent eliminates redundant components and reduces overall vehicle weight while maintaining shock absorption capability.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If a conventional suspension using coil spring and separate shock absorber is used, then the shock absorption function is achieved, but the interior space of the vehicle is reduced

Engineering Contradiction:

Improveshock absorption functionVSAvoidinterior space

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The integration of the damper bush into the existing leaf spring mounting bracket eliminates the need for a separate shock absorber mounting space, thereby preserving interior vehicle space while maintaining shock absorption function.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If a conventional suspension using coil spring and separate shock absorber is used, then the shock absorption function is achieved, but the assembly time increases

Engineering Contradiction:

Improveshock absorption functionVSAvoidassembly time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

By combining the shock absorption function into the leaf spring assembly, the patent reduces the number of assembly steps and components that need to be installed separately, thereby reducing assembly time.

Inventive Principle:

Principle #5Merging (Combining)

5Reliability

If a conventional suspension using coil spring and separate shock absorber is used, then the shock absorption function is achieved, but the number of assembly operations increases

Engineering Contradiction:

Improveshock absorption functionVSAvoidnumber of assembly operations

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the shock absorber function with the leaf spring mounting bracket, reducing the number of separate assembly operations required during manufacturing and installation.

Inventive Principle:

Principle #5Merging (Combining)

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

This design reduces the number of parts and assembly time, decreases vehicle weight, improves fuel efficiency, and expands interior space by integrating damping functions within the suspension system.

Implementation Method 1

a rubber bush mounted on an outer surface of the mid-pipe, and including an elastically deformable material

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

a vane mounted on an outer surface of the inner pipe; a mid-pipe configured to surround an outer surface of the vane and to contain fluid

Methodology Applied

Scientific EffectViscous damping: Viscous Damping

Implementation Method 3

the fluid may include silicon oil

Methodology Applied

Scientific EffectViscous damping: Viscous Damping

Data Source

PatentUS11660923B2Suspension for vehicle

Publication Date: 2023.05.30 HYUNDAI MOBIS CO LTD

AI summary

A suspension for a vehicle may include: a center leaf spring; side leaf springs respectively installed on opposing sides of the center leaf spring; mounting brackets configured to connect the center leaf spring and the side leaf springs, respectively; and damper bushes mounted in the mounting brackets, respectively, and configured to absorb shock.