Tubular Stabilizer Welding Structure for Sealing and Fatigue Strength
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Solution Overview
Problem
Conventional stabilizers face challenges in sealing the inside of the main body cylinder portion and improving fatigue strength.
Innovation Solution
A stabilizer design featuring an elastically deformable main body cylinder with a solid fixed shaft portion, including a large diameter portion and a step portion for enhanced sealing and fatigue strength, utilizing continuous welding around the circumference to ensure a wide joint area and accurate positioning, and additional welded portions for increased durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner peripheral surface of the main body cylinder portion is joined to the outer peripheral surface of the fitting portion, then sealing is achieved, but the joint area is limited and fatigue strength is insufficient
Solution Approach 1:
The invention transitions from a single-dimension joint (inner peripheral surface only) to a two-dimension joint by adding the large diameter portion that extends to the opening end edge, creating multiple joint areas (first welded portion at the opening end and second welded portion at the inner peripheral surface) that work together to improve both sealing and fatigue strength
2Weight of moving object
If the main body cylinder portion is made thinner to decrease weight, then weight reduction is achieved, but strength and sealing are compromised
Solution Approach 1:
The invention creates a composite structure by joining the main body cylinder portion and fixed shaft portion through multiple welded portions, forming a hybrid assembly that maintains strength while allowing the main body cylinder to be thinner and lighter
3Ease of manufacture
If relative positioning is not precisely controlled during joining, then manufacturing is simpler, but sealing and joint quality are poor
Solution Approach 1:
The large diameter portion is designed with a specific diameter larger than the main body cylinder portion before the joining process, creating a natural positioning feature that guides and constrains the relative position between components during assembly, ensuring accurate alignment without complex positioning mechanisms
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 design effectively seals the main body cylinder portion and enhances fatigue strength, allowing for thinner construction while maintaining strength and preventing terminal deterioration, with improved manufacturing efficiency through continuous welding.
Implementation Method 1
a first welded portion joining an opening end edge of the main body cylinder portion and the large diameter portion and continuously extending over the entire length thereof in a circumferential direction
Implementation Method 2
a second welded portion joining an inner peripheral surface of the main body cylinder portion and an outer peripheral surface of the fitting portion
Data Source
AI summary
A stabilizer includes a main body cylinder portion which is elastically deformable; and a pair of connection portions respectively connected to a pair of left and right suspension devices. Each of the pair of connection portions is provided with a fixed shaft portion which is solid and fixed to the main body cylinder portion. The fixed shaft portion includes a fitting portion fitted into the main body cylinder portion and a large diameter portion connecting the fitting portion and a connection portion of the pair of connection portions and formed to have a diameter larger than that of the fitting portion.