Recessed Rotary Frame Structure for Grader Bending Strength
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Solution Overview
Problem
The existing rotary frames in graders suffer from insufficient bending strength, leading to frequent damage and reduced service life due to increased weight, number of weld joints, and concentrated welding stress, which complicates the welding process.
Innovation Solution
A redesigned rotary frame with a symmetrical structure featuring a recessed portion, openings, and integrated arc-shaped and flat plate sections, along with connecting pieces and a supporting base, which reduces stress concentration and enhances structural strength while maintaining a lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a triangular reinforcing plate is arranged in a triangular area between the rotary ring and connecting plate, then the structural strength of the rotary frame is enhanced, but the weight of the rotary frame structure and the number of weld joints are increased
Solution Approach 1:
The patent merges the reinforcing plate with the rotary ring to form an integrated structure. The reinforcing plate is not a separate component but is combined with the rotary ring, reducing the number of parts and weld joints while maintaining the strengthening effect.
Solution Approach 2:
The rotary frame is segmented into functional zones: the rotary ring with integrated reinforcing plates, the connecting plates at both ends, and the supporting base. This segmentation allows each component to be optimized independently, with the reinforcing plates providing localized strength where needed without adding overall weight.
2Strength
If a triangular reinforcing plate is arranged in a triangular area between the rotary ring and connecting plate, then the structural strength of the rotary frame is enhanced, but the welding process has high difficulty and the welding stress is concentrated
Solution Approach 1:
The reinforcing plate is merged with the rotary ring as an integrated component, reducing the number of separate weld joints. This integration simplifies the welding process by eliminating multiple connection points between separate parts.
Solution Approach 2:
The reinforcing plates are strategically positioned at specific locations on the rotary ring where stress concentration occurs. This local reinforcement approach provides strength exactly where needed without requiring extensive welding throughout the entire structure.
3Strength
If the rotary frame structure uses traditional design with multiple weld joints, then the structural strength can be maintained, but the welding stress is concentrated resulting in frequent failure
Solution Approach 1:
The reinforcing plates are combined with the rotary ring as an integrated structure, reducing the number of weld joints. Fewer weld joints mean fewer potential failure points, thereby improving reliability while maintaining structural strength.
Solution Approach 2:
The reinforcing plates are positioned at critical stress concentration areas on the rotary ring, providing localized strength enhancement. This targeted reinforcement improves reliability by addressing specific weak points without requiring a complete redesign of the entire structure.
Data Source
AI summary
The present disclosure discloses a rotary frame and a grader, and relates to the field of a grader. The rotary frame includes: a rotary ring, provided with a recessed portion and an opening; a first connecting piece fixed at the periphery of the rotary ring, one end of the first connecting piece being attached to the periphery of the rotary ring and the other end of the first connecting piece being separated from the periphery of the rotary ring; a second connecting piece, the second connecting piece being also fixed at the periphery of the rotary ring, and one end of the second connecting piece being attached to the periphery of the rotary ring and the other end of the second connecting piece being separated from the periphery of the rotary ring; a supporting base fixed on an inner wall of the rotary ring and located in the recessed portion.