Electric Ground Processing Roller With Intermediary Speed Conversion
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Solution Overview
Problem
Existing ground processing rollers with electric drive motors require complex gear arrangements to achieve suitable speeds, which can lead to structural complexity and inefficiency.
Innovation Solution
A ground processing roller design featuring an electric roller drive motor coupled to a gear arrangement via a speed conversion arrangement, allowing for spatial decoupling and simpler gear structure, with the motor drive element rotating eccentrically to the roller axis, and incorporating a vibration generation system for oscillatory movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an electric roller drive motor is used to drive the ground processing roller, then the use of fossil fuels is avoided and environmental performance is improved, but a gear arrangement is required to convert motor speed to roller speed, increasing device complexity
Solution Approach 1:
A speed conversion arrangement acts as an intermediary between the electric roller drive motor and the gear arrangement. This intermediate mechanism converts motor speed to a more suitable range before the gear arrangement, allowing the gear arrangement to be simpler in structure while still achieving the required roller speed for ground processing machine movement.
2Device complexity
If the electric roller drive motor is directly coupled to the gear arrangement, then the structure is simpler, but the motor cannot be spatially decoupled from the gear arrangement, limiting design flexibility
Solution Approach 1:
The speed conversion arrangement serves as a decoupling intermediary that allows the electric roller drive motor to be positioned at a different location from the gear arrangement. The motor drive element rotates about a motor rotation axis that is eccentric to the roller rotation axis, enabling spatial separation while maintaining functional connection through the speed conversion arrangement.
3Device complexity
If the gear arrangement is designed to handle high motor speeds directly, then direct coupling is possible, but the gear arrangement becomes complex and inefficient
Solution Approach 1:
The speed conversion arrangement performs preliminary speed conversion before the torque reaches the gear arrangement. By converting the high-speed motor output to a lower speed range first, the gear arrangement only needs to handle speed reduction from an already reduced speed, simplifying its structure and improving overall efficiency.
Solution Approach 2:
The speed conversion arrangement acts as an intermediate speed conversion stage between the motor and the gear arrangement. This two-stage approach (speed conversion arrangement + gear arrangement) allows each component to be optimized for its specific speed range, resulting in a simpler overall structure compared to a single complex gear arrangement handling the full speed range.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves the required speed for ground processing machines with a structurally simple and efficient electric roller drive, reducing operational complexity and enhancing performance by allowing for compact and reliable operation.
Implementation Method 1
a speed conversion arrangement for torque transmission... provides the possibility of speed conversion before the gear arrangement
Implementation Method 2
the drive pulley and the driven pulley are coupled by at least one belt, preferably a toothed belt, for torque transmission
Implementation Method 3
a gear arrangement, and that a motor drive element of the electric roller drive motor is coupled to a gear input element of the gear arrangement
Data Source
AI summary
A ground processing roller for a ground processing machine, in particular a ground compactor, includes a roller shell extending in the direction of a roller rotation axis and surrounding the roller rotation axis and a roller drive for driving the roller shell to rotate about the roller rotation axis. The roller drive includes an electric roller drive motor and a gear arrangement. A motor drive element of the electric roller drive motor is coupled to a gear input element of the gear arrangement by a speed conversion arrangement for torque transmission.