Rear Suspension Mounting Unit Lateral Stiffness via Support Bracket

Solution Overview

Problem

The existing mounting units for rear suspension in vehicles have low resistance to lateral deformation during vehicle cornering, leading to safety concerns due to concentrated lateral forces on the mounting bolt, causing local deformation in the cavities between the rear floor side member, rear cross member, and the mounting unit.

Innovation Solution

A mounting unit design that includes a support bracket between the rear floor side member and the rear cross member, with a pipe nut, first and second brackets, and a reinforcement plate, enhancing structural stiffness by forming a closed cavity and flanges to distribute loads effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a mounting bolt is used to couple the rear suspension member to the rear floor side member, then the suspension member can be securely mounted, but lateral force concentrates on the mounting bolt causing local deformation and reducing resistance to lateral deformation

Engineering Contradiction:

Improvemounting strengthVSAvoidresistance to lateral deformation

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The mounting unit is divided into multiple components: mounting bracket, support bracket, reinforcement plate, and mounting bolt. The mounting bracket and support bracket create separate structural zones that distribute lateral forces, preventing concentration on a single mounting bolt. The reinforcement plate further segments the load path through the rear floor side member.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mounting bracket acts as an intermediary between the rear suspension member and the rear floor side member, distributing mounting forces. The support bracket serves as an intermediary that provides additional lateral support, mediating the load transfer and preventing direct force concentration on the mounting bolt.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If the mounting unit uses a simple bracket and bolt configuration, then the device complexity is low and ease of manufacture is high, but the structural stiffness and vehicle safety are reduced

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidvehicle safety

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The mounting unit is divided into multiple components: mounting bracket, support bracket, reinforcement plate, and mounting bolt. The mounting bracket and support bracket create separate structural zones that distribute lateral forces, preventing concentration on a single mounting bolt. The reinforcement plate further segments the load path through the rear floor side member.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The support bracket extends in the lateral direction (width dimension) to provide additional support against lateral deformation. This adds a dimensional element to the mounting structure that was previously absent, creating a more rigid three-dimensional framework that resists lateral forces while maintaining manufacturability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Stability of the object's composition

If reinforcement structures are added to improve lateral stiffness, then vehicle safety and resistance to lateral deformation are improved, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveresistance to lateral deformationVSAvoidstructural complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The mounting unit is divided into multiple components: mounting bracket, support bracket, reinforcement plate, and mounting bolt. The mounting bracket and support bracket create separate structural zones that distribute lateral forces, preventing concentration on a single mounting bolt. The reinforcement plate further segments the load path through the rear floor side member.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mounting bracket serves multiple functions: it provides the primary mounting connection, acts as a structural reinforcement element, and distributes lateral forces. The support bracket similarly provides lateral support, structural reinforcement, and force distribution. This multi-functionality reduces the need for additional specialized components, managing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20190111972A1Mounting unit for rear suspension

Publication Date: 2019.04.18 HYUNDAI MOTOR CO LTD

AI summary

A mounting unit for a rear suspension is provided. The mounting unit for a rear suspension of a multi link type coupling a rear suspension member to a rear floor side member includes a pipe nut disposed through one side of the rear floor side member and first and second brackets that couple to upper and lower end portions of the pipe nut to the rear floor side member and a rear cross member, respectively. A mounting bolt is coupled to the pipe nut to maintain the position of one side of the rear suspension member to the rear floor side member, and a support bracket is coupled to the rear floor side member and the rear cross member with the first and second brackets through a flange and disposed between an exterior lateral surface of the rear floor side member and a bottom surface of the rear cross member.