Single Bolt Disc Hub for Tiller Jump Arm Assembly
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Solution Overview
Problem
Current tilling machines face difficulties in maintaining disc alignment and orientation, especially in challenging soil conditions, leading to inefficiencies and the need for time-consuming adjustments or replacements.
Innovation Solution
A tilling machine design featuring a jump arm assembly with a disc hub assembly that includes a single bolt disc hub for secure mounting of tilling discs, allowing for variable angle adjustments and easy disc replacement, utilizing a shaft with a threaded section for secure attachment and a bearing for rotational support, along with jump arm spacers to maintain lateral spacing and prevent operational issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple bolts (4-8 bolts) are used to secure discs to the tilling machine frame, then the disc mounting is more secure and stable, but the time required for disc replacement and adjustment increases significantly
Solution Approach 1:
The disc hub assembly is segmented into modular components including the hub body, mounting bolts, and disc interface, allowing the disc to be quickly detached and replaced by separating these segments without requiring removal of multiple fasteners
Solution Approach 2:
The disc hub assembly incorporates a dynamic quick-release mechanism that allows the disc to be rapidly mounted and dismounted by a single operator using a simplified fastening system, transforming the static multi-bolt connection into a dynamic quick-connect interface
2Reliability
If discs are secured with multiple bolts to the frame, then the mounting is more secure, but the alignment and orientation of discs becomes difficult to maintain in rocky soil conditions
Solution Approach 1:
The disc hub assembly incorporates alignment features and mounting geometry that pre-compensate for forces encountered in rocky soil conditions, maintaining disc alignment and orientation without requiring operational adjustments
Solution Approach 2:
The disc hub assembly serves multiple functions simultaneously: it secures the disc to the frame, maintains proper alignment and orientation, and provides a quick-release capability, replacing the need for separate alignment adjustment mechanisms
3Reliability
If four to eight bolts are used to mount discs, then the disc attachment is more secure, but the complexity of the disc hub assembly increases
Solution Approach 1:
Multiple fastening functions are merged into a single integrated disc hub assembly that combines the hub body, mounting interface, and fastening mechanism into one unified component, reducing the number of separate parts and assembly steps
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 solution ensures consistent disc alignment and orientation, facilitating efficient tilling operations even in difficult soil conditions, reducing downtime for adjustments and replacements, and enhancing the overall performance of the tilling machine.
Implementation Method 1
The second axial shaft section is at least partially threaded (e.g., by defining male threads) to receive a threaded nut (e.g., a single threaded nut) for securing the tilling disc to the disc hub assembly
Implementation Method 2
The first axial shaft section is rotatably mounted within the hub housing
Data Source
AI summary
A jump arm assembly for a tilling machine includes a jump arm and a disc hub assembly for coupling a tilling disc to the jump arm. The jump arm has a first end configured to be coupled to a frame unit of the tilling machine and a second end opposite the first end. The disc hub assembly includes a hub housing and a shaft having a first axial shaft section and a second axial shaft section. The first axial shaft section is configured to be rotatably mounted within the hub housing. The second axial shaft section extends outwardly from the hub housing and is at least partially threaded to receive a threaded nut to secure the tilling disc to the disc hub assembly.