Dual-Diameter Roller Soil Compactor for Uniform Seedbed
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Solution Overview
Problem
Current soil working tools face challenges in achieving uniform and sufficient surface pressure for efficient soil compaction, leading to uneven seedbed quality and difficulties in maneuvering long combination machines, which are also expensive and time-consuming.
Innovation Solution
A soil working tool with two rollers of different diameters, where the first roller is positioned higher than the second, allowing for controlled surface pressure and depth adjustment, enabling pre-compaction and final compacting without soil accumulation, and featuring a frame actuator for adjusting the rollers' level and angle relative to the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single roller is used for soil compaction, then the device is simple and easy to maneuver, but uniform and sufficient surface pressure cannot be achieved
Solution Approach 1:
The soil compaction function is divided into two segments: a first roller for pre-compaction and a second roller for final compaction. This segmentation allows each roller to perform a specific function, achieving uniform and sufficient surface pressure while keeping the overall device relatively simple.
Solution Approach 2:
Each roller is given different local qualities: the first roller has a larger diameter for pre-compaction, while the second roller has a smaller diameter for final compaction. This local differentiation enables each roller to optimize its function for its specific compaction stage, ensuring uniform soil pressure distribution.
2Object-generated harmful factors
If a large diameter roller is used, then soil accumulation in front of the roller is reduced, but surface pressure decreases
Solution Approach 1:
The compaction process is segmented into two stages with two rollers of different diameters. The first roller uses a larger diameter to prevent soil accumulation, while the second roller uses a smaller diameter to generate high surface pressure for final compaction, thus resolving the contradiction between roller diameter and surface pressure.
Solution Approach 2:
The first roller performs preliminary compaction action by preventing soil accumulation through its larger diameter, preparing the soil surface for the second roller. This preliminary action ensures that the second roller can apply maximum surface pressure without encountering soil buildup, thereby achieving both goals.
3Productivity
If combination machines with multiple soil preparation types are used, then productivity increases, but the machine becomes large and difficult to maneuver
Solution Approach 1:
The dual-roller compaction device performs multiple soil preparation functions (pre-compaction and final compaction) within a single relatively compact unit. This multi-functionality increases productivity by combining operations that would otherwise require separate machines, while the integrated design maintains reasonable maneuverability.
4Stress or pressure
If front-mounted soil compacters are loaded with weights, then sufficient soil pressure is achieved, but steering becomes heavy and loads on steering gear increase
Solution Approach 1:
Instead of uniformly loading the entire compacter with weights, the invention applies pressure locally through two rollers of different diameters. The first roller provides pre-compaction pressure, and the second roller provides final compaction pressure, achieving sufficient soil pressure without the need for additional weights that would impair steering.
Data Source
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AI summary
There is disclosed a soil working tool with a roller frame (4) supporting a first and a second roller (9, 10). The first roller (9) in the direction of movement (11) of the tool will have greater diameter than the second roller (10). The first roller (9) will have its bottom side (12) disposed at a level (13) which is higher than a level (14) of the bottom side (15) of the second roller (10). The larger roller (9) may hereby provide pre-working of the soil, and the second roller (10) with perform final working. With a soil compacter, a first roller (9) may thus be able to actuate the ground with a lower surface pressure, and the second roller (10) may provide a greater surface pressure due to the lesser diameter. The soil may hereby be compressed with the intention of establishing a correct seedbed.