Land Leveller Swing Frame Closed-Shape Beam Design
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Solution Overview
Problem
The existing swing frame structures in land levelers, typically T-shaped or Y-shaped, suffer from poor stiffness and strength, leading to large bending moments and instability during ditching and slope scraping operations, which can result in structural damage and compromise the overall vehicle stability.
Innovation Solution
A swing frame structure comprising a supporting beam assembly with multiple sequentially connected beam members forming a closed shape, such as a triangle, which provides improved bending and torsion resistance, and is designed to be lightweight and compact, incorporating a four-bar mechanism for enhanced stability and operational performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the size of the swing frame structure is enlarged to improve stiffness and strength, then the bending moment resistance is improved, but the weight increases which is not beneficial for lightweight design
Solution Approach 1:
The swing frame structure is divided into multiple beam members (first beam member, second beam member, third beam member) that are connected sequentially at end parts. This segmentation allows each beam to be optimized independently while collectively providing the required strength, avoiding the need to uniformly enlarge the entire structure and thus controlling weight.
Solution Approach 2:
The swing frame employs a composite structural design combining multiple beam members with different configurations (straight or bent) and cross-sections (rectangular, circular, I-shaped, or U-shaped). This composite approach allows optimization of material distribution to achieve high strength-to-weight ratio, improving strength without proportionally increasing weight.
2Device complexity
If the swing frame structure is designed with T-shaped or Y-shaped configuration, then the structure is simple, but the stiffness and strength are poor leading to large bending moments
Solution Approach 1:
Instead of using a simple T-shaped or Y-shaped monolithic structure, the invention segments the swing frame into multiple beam members connected at end parts forming a closed shape. This segmentation creates a more efficient load path that distributes bending moments across multiple members, improving strength without excessive complexity.
Solution Approach 2:
The swing frame transitions from a planar T-shaped or Y-shaped configuration to a three-dimensional closed-loop structure formed by sequentially connecting beam members at their end parts. This dimensional transformation creates a more rigid structure with superior bending moment resistance while maintaining reasonable complexity through the use of standard beam configurations.
3Stability of the object's composition
If the swing frame structure is enlarged to improve stiffness, then the bending moment resistance is improved, but the structure occupies more space and increases in weight
Solution Approach 1:
The swing frame is segmented into multiple beam members with optimized individual dimensions and cross-sections. This allows the structure to achieve high stiffness through efficient geometric arrangement and material distribution rather than simply enlarging the overall volume, thus maintaining compact dimensions while improving stiffness.
Solution Approach 2:
The composite structure of multiple beam members with different cross-sections (rectangular, circular, I-shaped, or U-shaped) enables optimized material distribution that maximizes stiffness-to-volume ratio. This allows the swing frame to achieve high stiffness without proportionally increasing volume, as each beam can be tailored to its specific structural requirements.
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 new swing frame design enhances the bearing capability and stress distribution, improving the stability and safety of the land leveler while allowing for a lightweight and efficient structure, effectively addressing the limitations of traditional designs.
Implementation Method 1
the supporting beam assembly comprises multiple beam members, and the multiple beam members are connected sequentially at end parts, such that the multiple beam members form a closed shape... each side of the supporting beam assembly plays a role of bearing and supporting, thereby improving stress of the swing frame, improving bearing capability of the swing frame
Implementation Method 2
the supporting beam assembly comprises multiple beam members, and the multiple beam members are connected sequentially at end parts, such that the multiple beam members form a closed shape... the supporting beam assembly bears the bending resistance and torsion resistance effects of the swing frame
Implementation Method 3
at least one connecting part is rotatably connected with the vehicle frame, and at least another connecting part is rotatably connected with a driving part
Implementation Method 4
the connecting plate of the front rack, the beam of the front rack, the swing frame and the oil cylinder form a four-bar mechanism
Data Source
AI summary
A land leveller includes a vehicle frame and a swing frame. The swing frame include a supporting beam assembly and connecting parts, the supporting beam assembly include multiple beam members, and the multiple beam members are connected sequentially at end parts, such that the multiple beam members form a closed shape. The connecting part is arranged at the connecting end part between two adjacent beam members. At least one connecting part is rotatably connected with the vehicle frame, and at least another connecting part is rotatably connected with a driving part.