Tilling Hub and Weight Plate Assembly for Penetration Control

The patent applies adjustable weights that can be added or removed from the harrow frame to dynamically control the downward force on ground engaging tools. This allows the system to adapt penetration depth to varying soil conditions without permanently increasing tool weight, resolving the contradiction between needing sufficient penetration force and avoiding excessive subsoil mixing.

The patent changes the parameter of applied downward force by incorporating adjustable weight plates on the harrow frame. This external weight application independently of tool self-weight allows precise control of penetration depth, enabling the system to achieve required penetration without the tools themselves being excessively heavy, thus avoiding subsoil disturbance.

The patent segments the harrow into modular components with standardized mounting interfaces. Ground engaging tools can be independently replaced by loosening fasteners without disassembling the entire harrow or removing adjacent tools. This segmentation dramatically reduces tool replacement time while maintaining cutting efficacy, as worn tools can be quickly swapped at individual mounting locations.

The patent incorporates readily accessible fasteners and mounting structures that allow tool replacement to be performed quickly with minimal preparation. The design enables operators to perform preliminary actions (loosening fasteners, removing worn tools) without complex disassembly procedures, significantly reducing the time loss associated with tool maintenance while preserving cutting efficacy.

The patent employs simple gravity-based weight plates that are self-contained and require no active control mechanisms, motors, or complex linkages. The weights passively provide downward force when positioned on the harrow frame, and can be easily added or removed by operators. This self-service approach achieves penetration control functionality without introducing significant device complexity.

The patent designs the weight plates and mounting structures to serve multiple functions: controlling penetration depth, stabilizing the harrow during operation, and potentially serving as counterweights. This multi-functionality allows the added components to justify their presence by providing multiple benefits rather than simply increasing complexity for a single purpose.