Milling Roller Spline Coupling for Fast Soil Stabilizer Replacement
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Solution Overview
Problem
Existing milling roller replacement systems for soil and aggregate stabilisation machines are complex, expensive, and require special tools, making them inefficient and time-consuming, especially for machines like tractor-towed soil stabilisers where the milling roller is driven by a separate mechanical vehicle.
Innovation Solution
A soil and aggregate stabilisation machine with a milling roller featuring a frame with self-aligning arms, where the milling roller is seated via a transmission with a positive connection in the form of a recess and spline, allowing for quick and easy replacement without the need for disassembling the machine side wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the milling roller is driven by a hydrostatic drive with hydraulic motors installed on both sides, then the milling roller can be operated, but the device complexity increases and the milling roller diameter must be increased to ensure larger soil penetration depth
Solution Approach 1:
The patent extracts the hydraulic drive system from the milling roller assembly, moving it to a separate location on the machine frame. This allows the milling roller to be driven by a single hydraulic motor positioned externally, reducing the complexity of having hydraulic motors on both sides of the roller while maintaining the required power transmission.
2Length of moving object
If the milling roller diameter is increased to ensure larger soil penetration depth, then the soil penetration depth increases, but the machine weight increases
Solution Approach 1:
The patent employs self-aligning arms with adjustable geometry that allow the milling roller to dynamically adapt its orientation and effective working diameter during operation. This dynamic adjustment capability enables the roller to achieve adequate soil penetration depth without permanently increasing its physical diameter, thereby avoiding the associated weight increase.
3Adaptability or versatility
If the milling roller replacement system uses ring flanges and cylindrical segments interconnected, then the milling roller can be replaced, but the replacement system becomes complex and requires special auxiliary units
Solution Approach 1:
The patent segments the milling roller assembly into the roller itself and the drive mechanism, allowing the roller to be independently removed and replaced. The drive mechanism remains fixed on the machine frame, eliminating the need for complex interconnected ring flanges and auxiliary assembly units, while still enabling roller replacement capability.
4Reliability
If the milling roller is supported by a bearing and driving unit with the drive placed inside the roller, then the roller can be supported, but the hydraulic drive performance is low resulting in efficiency decrease
Solution Approach 1:
The patent introduces a transmission mechanism as an intermediary between the externally positioned hydraulic motor and the milling roller. This transmission system (which may include gears, belts, or chains) allows the hydraulic motor to be positioned externally for better performance and accessibility while still effectively transmitting power to the roller, overcoming the limitation of placing the drive inside the roller.
Data Source
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AI summary
A soil and aggregate stabilisation machine with a milling roller containing a frame (1) with self-aligning arms (3) on which a milling roller (2) is seated via a transmission (4), characterised by the fact that the cylindrical flange (4B) of the transmission (4) has a positive element (4A) in the form of a recess connected with the positive element (3A) in the form of a spline located on the cylindrical flange (3B) of the self-aligning arm (3).