Agricultural Header Pivot Assembly for Cutter Bar Levelness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The cutter bar assembly in agricultural headers can become out-of-level due to wear, use, loads, and manufacturing tolerances, leading to inconsistent cutting heights and reduced performance.
Innovation Solution
A pivot assembly is integrated into the arm of the agricultural header, comprising a fastener coupled to the header's frame and a cross-member that extends through a slot in the arm, allowing the arm to move and engage the end of the slot to limit its range of motion, thus maintaining the cutter bar assembly's levelness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the arm is allowed to move freely to accommodate wear and manufacturing tolerances, then the cutter bar assembly becomes out-of-level, but if the arm is constrained to maintain levelness, then the cutting height consistency improves
Solution Approach 1:
The pivot assembly allows the arm to dynamically adjust its position within a controlled range of motion. The slot provides guided movement in the vertical direction to accommodate wear and tolerances, while the transverse member with stop features limits the movement to maintain proper cutter bar levelness. This dynamic constraint system resolves the contradiction by allowing necessary movement while preventing excessive deviation.
Solution Approach 2:
The invention changes the parameter of arm movement from completely free to constrained within specific limits. The slot geometry and transverse member positioning define acceptable ranges for arm displacement, transforming the system from unlimited adaptability to controlled adaptability that maintains cutting precision while accommodating normal wear and manufacturing variations.
2Stability of the object's composition
If the pivot assembly constrains the arm movement to maintain levelness, then the cutter bar assembly remains level, but the arm's range of motion is limited
Solution Approach 1:
The movement constraint is segmented into two independent components: vertical movement along the slot axis and transverse movement limited by the transverse member. This segmentation allows the arm to move vertically to maintain levelness while restricting lateral displacement, effectively separating the degrees of freedom to achieve stability without excessive limitation of necessary motion.
3Reliability
If the cross-member extends through the slot to limit range of motion, then the arm's movement is controlled, but the device complexity increases
Solution Approach 1:
The transverse member serves multiple functions simultaneously: it acts as a structural support element, provides the stopping feature to limit arm movement, and guides the arm's motion along the slot. By combining these functions into a single component, the invention reduces overall device complexity while maintaining reliable movement control compared to using separate components for each function.
Data Source
AI summary
A pivot assembly for an arm of an agricultural header includes a fastener coupled to a frame of the agricultural header and a cross-member coupled to the fastener. The cross-member extends at least partially through a slot in the arm, and the cross-member is configured to move along the slot in the arm and to engage an end of the slot in the arm to limit a range of motion of the arm relative to the frame.