Detachable Agricultural Seeding Combination for Tractor Axle Loads
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Solution Overview
Problem
Existing agricultural tillage equipment, such as rotary harrows with seed bars, exceed permissible axle loads of tractors due to increased weight, necessitating complex and laborious disassembly for solo operation, and lack flexibility in changing between solo and combined operations.
Innovation Solution
A modular tillage combination with a detachable spreading machine and chassis design, allowing the weight of the spreader to be supported on a movable frame that relieves the tractor's rear axle, enabling flexible operation and compliance with axle load limits, with adjustable components for varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seed bar is mounted on the rotary harrow for combined operation, then the seeding function is integrated, but the overall machine weight exceeds permissible tractor axle loads
Solution Approach 1:
The seeding system is segmented from the rotary harrow into a separate spreader unit with its own independent frame and support structure. This allows the seed bar to be mounted on a dedicated platform that can be configured independently, distributing weight more effectively and enabling the rotary harrow to operate within axle load limits when used alone.
Solution Approach 2:
An intermediate frame structure is introduced between the rotary harrow and the seed bar, serving as a mediator that provides additional support points and distributes the combined operation weight across multiple axles or support structures, thereby reducing the load on any single tractor axle.
2Device complexity
If the seed bar is mounted directly on the rotary harrow, then the structure is simplified, but great effort is required to dismantle for solo operation
Solution Approach 1:
The seeding apparatus is divided into separable modules - the spreader unit with tool frame can be detached from the rotary harrow. This segmentation maintains structural simplicity within each module while enabling easy separation for solo operation, reducing dismantling effort compared to permanently integrated designs.
Solution Approach 2:
The coupling between the rotary harrow and spreader is designed to be dynamically changeable - easily connectable and disconnectable. This dynamic coupling mechanism allows the system to transition between combined and solo operation modes without requiring complex permanent integration or labor-intensive disassembly.
3Weight of moving object
If the chassis is rigidly connected to support the spreader weight, then the axle load is reduced, but uneven road surfaces can lift the chassis off the ground causing dangerous situations
Solution Approach 1:
The chassis connection to the spreader frame is designed as a movable, articulated linkage rather than a rigid fixed connection. This dynamic coupling allows the chassis to move independently relative to the spreader, maintaining ground contact and load support on uneven terrain while preventing dangerous lifting or overloading conditions.
Solution Approach 2:
The movable connection allows the geometric parameters of the chassis-spreeder assembly to change dynamically in response to terrain variations. The articulation points and linkage geometry adjust automatically to maintain optimal weight distribution and ground contact, preventing unsafe conditions while continuing to reduce axle loads.
Data Source
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AI summary
A sowing combination (1) comprising a soil tillage implement (3) and a spreading machine (4) is proposed. By arranging a chassis (8) on a movable tool frame (6) of the spreading machine, a significantly lighter, simpler, and more cost-effective chassis design is possible than would be the case if the chassis were arranged directly on the soil tillage implement of the sowing combination. Since the chassis is only required to relieve the load on the tractor's rear axle when the entire sowing combination (1) is coupled, but not for individual or solo operation of the soil tillage implement, the latter can remain mounted on the latter thanks to the detachable connection between the soil tillage implement and the spreading machine and can be parked together with the latter.