Soil Compactor Roller With Guided Masses for Mode Switching
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Solution Overview
Problem
Existing compactor rollers for soil compactors face challenges in efficiently switching between oscillation and vibration operations while maintaining a compact design.
Innovation Solution
A compactor roller design with oscillation/vibration units featuring unbalanced masses that move between end positions through guideways, allowing for a compact structure and controlled switching between oscillation and vibration modes by adjusting the phase and orientation of centrifugal forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the second unbalanced mass part pivots by 180° relative to the first unbalanced mass part to switch between oscillation and vibration operations, then the switching between operating states is achieved, but the design complexity and space requirements increase
Solution Approach 1:
The second unbalanced mass part is designed to be movable relative to the first unbalanced mass part, allowing dynamic reconfiguration of the mass distribution. This enables the system to switch between oscillation and vibration operations by changing the relative position of the mass parts, rather than requiring separate fixed configurations for each mode.
Solution Approach 2:
The oscillation/vibration unit is designed to perform multiple functions using the same basic structure. By allowing the second unbalanced mass part to pivot relative to the first, a single unit can generate both oscillating motion (for breaking up compacted soil) and vibrating motion (for general compaction), eliminating the need for separate oscillation and vibration mechanisms.
2Adaptability or versatility
If the centers of mass are arranged with phase offset of 180° for oscillation operation, then the oscillation operation is achieved, but the structural space and complexity increase
Solution Approach 1:
The second unbalanced mass part is nested within or integrated with the first unbalanced mass part structure, allowing it to pivot within the existing spatial envelope. This nesting approach enables the 180° phase offset configuration for oscillation operation without significantly increasing the overall volume of the oscillation/vibration unit.
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
Enables efficient switching between oscillation and vibration operations with balanced centrifugal forces, enhancing compaction efficiency and reducing the complexity of the design.
Implementation Method 1
the respective centrifugal forces acting on the center of mass are equally large and identically directed for the two oscillation/vibration units, and thus a total centrifugal force arises substantially orthogonal to the roller axis of rotation
Data Source
AI summary
A compactor roller for a soil compactor comprises a roller shell (24), rotatable about a roller axis of rotation (W) and surrounding a roller interior (23), an oscillation/vibration assembly (28) arranged in the roller interior (23), wherein the oscillation/vibration assembly (28) comprises a first oscillation/vibration unit (30) with at least one drivable first unbalanced mass (50, 50′) for rotation about a first oscillation/vibration axis of rotation (D1), and a second oscillation/vibration unit (32) with at least one drivable second unbalanced mass (52, 52′) for rotation about a second oscillation/vibration axis of rotation (D2.) A center of mass of a second unbalanced mass part of the at least one first unbalanced mass (50, 50′) and/or a center of mass of a second unbalanced mass part of the at least one second unbalanced mass (52, 52′) moves, during the movement of the respective second unbalanced mass part (62, 86) between two end positions about the assigned oscillation/vibration axis of rotation (D1, D2) in an angle of less than 180°.