Single-Aperture Wrap for Pneumatic Suspension Axle Beam
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air-link type pneumatic suspension systems using parabolic springs are heavy and costly, while alternatives with steel plates cause high stress at the joint region between the axle beam and arm, leading to potential weld cracks and axle failure in rigorous conditions.
Innovation Solution
A wrap with a single cylindrical aperture is used to reduce stress concentration, eliminating corners and improving welding, which extends the life of the axle beam by distributing stress more evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a wrap with two apertures is used to connect the axle beam and arm, then the joint region can be mechanically linked, but high stress concentration occurs at the apertures leading to weld cracks and axle failure
Solution Approach 1:
The aperture is segmented into multiple slots that do not fully penetrate the cylindrical body, creating interruption regions that break up stress flow paths and reduce stress concentration at any single location
Solution Approach 2:
The wrap uses a cylindrical body with curved surfaces instead of flat plates with sharp corners. The curved geometry naturally distributes stress more evenly and eliminates corner stress concentrations that plague flat-aperture designs
2Weight of moving object
If steel plates are used to link the axle to suspension supports, then the system becomes lighter and more economical, but high stress is mechanically affected at the joint region
Solution Approach 1:
The cylindrical wrap body acts as a flexible shell structure that can deform elastically under load, distributing stresses throughout the curved surface rather than concentrating them at discrete attachment points
Solution Approach 2:
The aperture geometry is changed from two separate circular holes to a single elongated slot with interruption regions, fundamentally altering the stress distribution parameters in the joint region
Data Source
AI summary
A wrap used on pneumatic suspension systems which includes a cylindrical body (100) with a single aperture for links (110) which extends along the surface of the cylindrical body (100), the aperture (110) having a region of interruption (101) with the single aperture form (110), and also including a sequence of concordant slots (120).