Trailing Arm Bushing Structure for Impact Resistance and Bond Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing bushing structures for trailing arms in vehicle suspensions face challenges in securing impact resistance and durability due to the lower physical strength of plastic and potential adhesion issues between plastic and rubber, leading to intermittent peeling phenomena.
Innovation Solution
A bushing design incorporating a metal reinforcing material surrounding a steel inner rod and rubber elastic members, with a body having through-hole portions and stopping protrusions to enhance strength and durability, and a coupling configuration that increases bonding force between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic material is used for the inner rod, then manufacturing cost is reduced, but impact resistance and physical strength deteriorate
Solution Approach 1:
The patent employs composite materials by combining plastic (for the inner rod and body) with metal (for the reinforcing material) and rubber (for elastic members). This composite structure allows the plastic components to reduce manufacturing cost while the metal reinforcing material compensates for the lower strength of plastic, thereby resolving the contradiction between cost reduction and impact resistance.
2Device complexity
If plastic and rubber are directly bonded, then manufacturing process is simplified, but adhesion durability deteriorates due to adhesion dispersion
Solution Approach 1:
The patent introduces an intermediary approach by using a multi-layer composite structure where the metal reinforcing material is embedded within the rubber elastic members and bonded to the plastic body. This intermediate metal layer acts as a mediator that enhances adhesion between plastic and rubber, preventing peeling phenomena while maintaining manufacturing simplicity through integrated molding processes.
3Ease of manufacture
If single-material structure is used, then manufacturing is simpler, but durability under repeated impact deteriorates
Solution Approach 1:
The patent implements a composite structure consisting of multiple materials (plastic inner rod, plastic body, metal reinforcing material, and rubber elastic members) to enhance durability. The metal reinforcing material provides high strength and fatigue resistance under repeated impacts, while the rubber elastic members provide damping and shock absorption, collectively improving the bushing's service life beyond what a single-material structure could achieve.
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 improved bushing structure achieves increased strength against both front and rear loads, reducing deformation and manufacturing costs, while enhancing durability and impact resistance, and minimizing adhesion dispersion between components.
Implementation Method 1
a first elastic member (140) comprising a coupling hole (143) in which the reinforcing material (130) and the body (120) are disposed; a second elastic member (150) disposed around one or more portions of the first elastic member (140)
Data Source
AI summary
A bushing for a trailing arm may include an inner rod having a plate shape, a body in which a central portion of the inner rod is disposed, a reinforcing material disposed to surround an outer surface of the body, a first elastic member in which the reinforcing material is disposed, a second elastic member disposed around the first elastic member, and an outer steel member disposed to surround the first elastic member and the second elastic member. The reinforcing material may be disposed between the outer surface of the body and an inner surface of the first elastic member.