Electric Side Loader Arm Actuation Without Hydraulic Lines
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Solution Overview
Problem
Existing refuse vehicles rely on hydraulic systems for lifting and manipulating waste receptacles, which are prone to leaks and require frequent maintenance.
Innovation Solution
The implementation of electrically-powered actuators in the loader arm system, eliminating the need for hydraulic tanks and lines, thereby reducing maintenance and upkeep.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic systems are used for lifting and manipulating waste receptacles, then lifting force and manipulation capability are sufficient, but the system is prone to leaks and requires frequent maintenance
Solution Approach 1:
The patent replaces the hydraulic mechanical system with an electric actuation system. Electric motors and gear mechanisms are used instead of hydraulic pumps, hoses, and cylinders. This substitution eliminates the leakage problems inherent in hydraulic systems while providing sufficient lifting force through direct electric drive mechanisms, thereby improving reliability and reducing maintenance requirements.
Solution Approach 2:
The patent removes the hydraulic system components (hydraulic tank, hoses, pumps, and fluid) from the loader arm system. By extracting the problematic hydraulic elements and replacing them with electric actuators, the system eliminates the source of leaks and maintenance issues while retaining the necessary lifting and manipulation capabilities.
2Power
If hydraulic tanks and lines are included in the loader arm system, then sufficient lifting power is achieved, but system complexity and maintenance requirements increase
Solution Approach 1:
The patent substitutes electric motors with gear reduction mechanisms for the hydraulic power transmission system. This provides sufficient lifting power through direct mechanical drive while eliminating the complexity of hydraulic tanks, pumps, hoses, and pressure control systems. The electric actuation system achieves comparable or superior power delivery with fewer components and lower complexity.
3Ease of operation
If hydraulic systems are used for side-loading operations, then waste receptacle manipulation is effective, but leaks and maintenance become problematic
Solution Approach 1:
The patent replaces hydraulic actuators with electric motors and direct-drive or gear-driven mechanisms for manipulating waste receptacles. This substitution maintains effective manipulation capability through precise electric control while eliminating hydraulic fluid leaks that contaminate the environment and require cleanup. The electric system provides clean, leak-free 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 electrically-actuated loader arm system provides reliable and low-maintenance operation, enhancing the efficiency and durability of refuse vehicles.
Implementation Method 1
at least one electrically-driven actuation mechanism powered by the power source configured to selectively rotate the first articulating arm segment and the second articulating arm segment with respect to one another
Data Source
AI summary
A refuse vehicle includes a chassis, a body assembly, and an automated reach arm. The body assembly is coupled to the chassis and defines a refuse compartment configured to store refuse material. The automated reach arm includes a refuse container engagement mechanism, at least one electrically driven actuation mechanism, a first slew motor, and a second slew motor. The refuse container engagement mechanism is configured to selectively engage a refuse container. The at least one electrically driven actuation mechanism is configured to selectively actuate the automated reach arm between an extended position, a retracted position, and a refuse-dumping position. The first slew motor is configured to selectively swing the automated reach arm with respect to the body assembly about a first axis. The second slew motor is configured to selectively swing the refuse container engagement mechanism with respect to a second axis that is parallel to the first axis.