Refuse Packer Auger and Door Layout for Backflow-Free Compaction
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Solution Overview
Problem
Refuse collection vehicles face high maintenance costs and inefficiencies in compacting and ejecting refuse due to the use of hydraulic cylinders, which are prone to contamination and complex ejection mechanisms that may not fully discharge refuse.
Innovation Solution
A refuse collection vehicle system incorporating an auger screw and a door actuator system to pack and eject refuse, utilizing an auger screw and a door that can be selectively opened and closed to inhibit backflow, along with an ejector panel that compacts or ejects refuse, powered by electric actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic cylinders are used to drive ejector panels for packing refuse, then sufficient packing force can be achieved, but maintenance costs increase and reliability decreases due to fluid contamination
Solution Approach 1:
The patent replaces the hydraulic cylinder system with an electric motor-driven auger system. The auger screw, rotated by an electric motor, directly compacts and ejects refuse through mechanical rotation, eliminating hydraulic fluid and associated contamination risks. This substitution maintains sufficient packing force while dramatically improving reliability and reducing maintenance requirements.
2Productivity
If complex ejection mechanisms are used to discharge compacted refuse, then ejection capability is improved, but device complexity and maintenance requirements increase
Solution Approach 1:
The auger screw serves multiple functions: it transports refuse from the hopper to the storage compartment, compacts the refuse through rotational pressure, and ejects the compacted refuse by reversing rotation or changing direction. This single multi-functional component replaces what would traditionally require separate mechanisms for transport, compaction, and ejection, thereby reducing overall system complexity while maintaining full ejection capability.
3Device complexity
If tilting compartment mechanism is used to eject refuse, then ejection is simplified, but friction prevents complete discharge of refuse
Solution Approach 1:
The rotating auger screw creates dynamic mechanical action that disrupts friction between refuse and the compartment floor. The rotational motion generates forces that overcome static friction, allowing refuse to be fully dislodged and ejected. This dynamic mechanism ensures complete refuse discharge without requiring complex tilting or additional ejection aids.
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 reduces maintenance costs and improves refuse ejection efficiency by using electric actuators, allowing for effective compaction and ejection of refuse without hydraulic cylinder-related issues.
Implementation Method 1
an auger screw that packs refuse material from a hopper into a storage compartment of the RCV
Implementation Method 2
A door actuator system swings the door to selectively open and close the door on the opening
Implementation Method 3
an ejector panel that compacts or ejects refuse
Data Source
AI summary
A refuse collection vehicle having a packer system, a hopper, and a storage compartment. A wall between the storage compartment and the hopper defines an opening that allows refuse to pass from the hopper to the storage compartment. The packer system includes an auger screw and a driver. The driver rotates the auger screw such that refuse is packed into the storage compartment through the opening. A door can be positioned to cover the opening in the wall to inhibit refuse from passing back through the opening. A door actuator system moves the door to selectively open and close the door on the opening. A packing actuator can push an ejector panel across the floor of the storage compartment while the door is closed on the opening in the wall to further compact refuse in the storage compartment or to eject refuse from the vehicle.