Transmission Joint Bellows Structure for Large-Angle Buckling Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bellows designs for transmission joints often suffer from buckling issues when the joint members are at large angles, which can lead to ineffective protection and potential damage.
Innovation Solution
A bellows design featuring a hollow tubular body with fastening regions of different diameters, interconnected by a deformable wall with at least one fold, and a circumferential extension section with a collar or stiffener region to prevent buckling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the deformable wall is made highly flexible to accommodate large angles between joint members, then the flexibility is improved, but the bellows becomes prone to buckling and unwanted deformation
Solution Approach 1:
The bellows structure implements different mechanical properties in different regions: the deformable wall portion is designed to be highly flexible to accommodate angular movements, while the end regions incorporate stiffening elements (flanges, ribs, or reinforcement layers) to prevent buckling. This local differentiation of structural properties allows the bellows to simultaneously achieve both flexibility and stability.
Solution Approach 2:
The bellows can be constructed using composite material structures, combining flexible materials (such as rubber or elastomers) with stiffening components (such as fabric reinforcement, plastic ribs, or metal flanges). This composite approach enables the deformable wall to bend and flex while maintaining resistance to buckling through the integrated stiffening elements.
2Stability of the object's composition
If reinforcing ribs are added to the fold region to prevent buckling, then the buckling resistance is improved, but the device complexity increases
Solution Approach 1:
Instead of uniformly reinforcing the entire bellows structure, stiffening elements are strategically placed only in specific locations where they are most needed - primarily at the end regions and along the fold lines. This localized reinforcement approach provides adequate buckling resistance while minimizing the addition of structural complexity.
Solution Approach 2:
The bellows structure is divided into distinct functional zones: highly flexible deformable wall portions that accommodate movement, and stiffened end regions that provide anchoring and buckling resistance. This segmentation allows each zone to be optimized for its specific function without unnecessarily complicating the overall structure.
3Ease of manufacture
If the bellows is designed with a uniform cross-section to simplify manufacturing, then the ease of manufacture is improved, but the performance at large joint angles deteriorates due to buckling
Solution Approach 1:
The bellows employs varying cross-sectional properties along its length: the central deformable wall portion maintains a simpler geometry for ease of manufacturing, while the end regions incorporate stiffening features (flanges, ribs, or reinforcement layers) to prevent buckling. This local differentiation allows the majority of the structure to be manufactured simply while providing enhanced stability where required.
Solution Approach 2:
The cross-sectional parameters of the bellows are varied along its length to optimize both manufacturing and performance. The deformable wall portion can be manufactured with consistent parameters for simplicity, while the end regions gradually transition to include stiffening elements, creating a smooth parameter change that maintains manufacturability while improving buckling resistance.
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 provides enhanced flexibility and effectively prevents buckling at large angles between joint members, ensuring reliable protection of transmission joint components.
Implementation Method 1
a deformable wall (30) which connects the extension section (50) and the neck section (23), wherein the deformable wall (30) forms a fold (32) between the extension section (50) and the neck section (23)
Implementation Method 2
a circumferential extension section (50) with a circular free edge (51), wherein the deformable wall (30) is connected to the extension section (50) at a first connection line (60) which is located before the free edge (51) of the extension section (50), whereby a collar or stiffener region (52) is formed
Data Source
AI summary
Bellows (10) for the protection of parts of a transmission joint (40), wherein the bellows (10) is in the form of a hollow tubular body that is open at each of its ends and has a fastening region (21;22) at each of its open ends. The two fastening regions (21;22) have cross-sections with different outer diameters and run essentially in parallel to a longitudinal axis (X) of the bellows (10), and these end side fastening regions (21;22) are interconnected by a deformable wall (30) that runs transverse to the longitudinal axis (X) of the bellows (10), wherein the deformable wall (30) forms at least one fold (32) between the two fastening regions (21;22). Thereby, a first fastening region (21) with the larger outer diameter D is extended in the direction of a second fastening region (22) with the smaller outer diameter d by means of a circumferential extension section (50) with a circular free edge (51) and the deformable wall (30) is connected to this extension section (50) at a first connection line (60) which is located before the free edge (51) of the extension section (50). The outer surface of the extension section (50) is straight at least between the first connection line (60) and the free edge (51).