Semi-mounted reversible plough traction linkage design
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Solution Overview
Problem
Existing semi-mounted reversible plows are complex and expensive due to hydraulic components, and they often compromise tractor steerability and traction efficiency, especially when trying to increase rear axle load for improved traction.
Innovation Solution
A semi-mounted reversible plow design featuring a drawbar and guide gear arrangement that allows adjustable tension link positioning, minimizing control devices on the tractor, with a sliding guide mechanism and intermediate frame for enhanced traction and steerability, and an adjustable distance between pull direction and mounting points to optimize tractive force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic cylinders are used to generate tensile force in the upper link to increase rear axle load, then tractor traction is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the hydraulic cylinder component from the system. Instead of using hydraulic force multiplication, the invention uses a direct mechanical linkage where the plow frame's own weight and cutting resistance create the necessary tensile force in the upper link through a simple lever arm mechanism formed by the attachment points and tension link.
Solution Approach 2:
The plow frame itself serves to generate the traction force without requiring external hydraulic assistance. The weight of the plow frame and the resistance from the cutting edges automatically create the tensile force in the upper link during plowing operations, making the system self-sufficient for traction enhancement.
2Force
If the transverse axis is arranged far behind the three-point headstock to generate large tractive force, then tractor traction is improved, but steerability is compromised due to excessive front axle relief
Solution Approach 1:
The patent changes the positional parameters of the attachment points. The lower link attachment point is positioned forward on the plow frame rather than far behind the headstock, which shortens the lever arm and reduces the magnitude of tensile force in the upper link, thereby maintaining front axle load and steerability while still providing adequate traction enhancement.
3Manufacturing precision
If a jockey wheel with high support force is used to increase plow frame support, then working depth control is improved, but tractive force in the upper link is significantly reduced
Solution Approach 1:
The patent introduces a tension link as an intermediary mechanical element that directly transmits force between the plow frame and the three-point linkage. This rigid or semi-rigid link provides a more efficient force transmission path compared to the compliant jockey wheel, ensuring that tensile force is maintained in the upper link even when the plow frame is firmly supported during precision work.
Data Source
Figure 1
Figure 2
AI summary
The plough (1) has a plough frame (11) supported on a base over a chassis (12) with a carrier frame (15). A front part (16) of the carrier frame is rotationally fixed at a connector (6) over a free-wheel, and is parallely movable in a longitudinal direction (24) of the carrier frame. A traction guiding bar is arranged above a transverse axle (20), and is connected with the connector and the front part, where a traction direction of the bar lies above an assembly point. The bar impinges an upper guide of a tractor with a traction force based on an actual traction force of the tractor.