Retractable Breaker Bar With Isolated Diagonal Slots
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Solution Overview
Problem
Current asphalt milling techniques face issues with the accumulation of pavement material in diagonal slots of the breaker bar, obstructing actuation and lacking manual adjustment capabilities, which affects the control of pavement size and engine load.
Innovation Solution
A retractable breaker bar system with diagonal slots isolated from the cutting chamber, allowing manual adjustment via pins and hydraulic rams, enabling controlled material size and engine load management during milling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the breaker bar is made retractable with diagonal slots for automated adjustment, then the ability to control material size is improved, but pavement material accumulates in the diagonal slots and obstructs actuation
Solution Approach 1:
The patent extracts the diagonal slots from the breaker bar structure itself and relocates them to a separate adjustment mechanism positioned away from the cutting chamber. This separation removes the slots from the path of milled material, preventing accumulation and obstruction while preserving the adjustment functionality for controlling material size.
Solution Approach 2:
The patent introduces an intermediary adjustment mechanism that mediates between the hydraulic actuation system and the breaker bar position. This intermediary mechanism allows the breaker bar to be adjusted without requiring slots in the breaker bar itself, using instead a separate linkage system with pins and slots positioned in a clean environment away from material accumulation zones.
2Manufacturing precision
If automated adjustment mechanisms are used for the breaker bar, then adjustment precision is improved, but the system complexity increases
Solution Approach 1:
The patent segments the adjustment system into distinct functional components: a hydraulic cylinder for power delivery, a linkage mechanism with pins and slots for motion transformation, and the breaker bar itself. This segmentation allows each component to be optimized independently and simplifies maintenance while achieving precise positional control through the coordinated action of simple, well-defined elements.
3Productivity
If the breaker bar is extended to control material size, then material grinding effectiveness is improved, but the engine load increases
Solution Approach 1:
The patent implements a dynamically adjustable breaker bar position system that can be optimized in real-time based on operating conditions. The hydraulic actuation system allows the breaker bar to be positioned at optimal distances from the cutting head, enabling the operator to balance material size reduction effectiveness against engine load by adjusting the breaker bar extension as needed during operation.
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
The system provides increased stability and power for milling various surfaces by allowing precise control of material size and engine load, preventing material accumulation and enhancing operational efficiency.
Implementation Method 1
a hydraulic ram attached to pins which pass through slots in a plate
Data Source
AI summary
A retractable breaker bar is distanced from a cutting head by actuation of a hydraulic ram in a system for grinding material. Slots formed in the breaker bar are isolated from the milling material to prevent milling material from getting lodged in the slots and obstructing actuation of the breaker bar. Pin holes formed in the hatch cover and the housing which can be manually secured at a variety of heights when the holes are aligned to provide for a variety of ram options.