Electric Refuse Grabber Assembly With Eccentric Gearing
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Solution Overview
Problem
Existing refuse vehicles lack efficient and reliable electrically actuated grabber assemblies that can securely grasp and transport waste containers, requiring hydraulic systems that are cumbersome and less environmentally friendly.
Innovation Solution
A fully-electric grabber assembly featuring a carriage with pivotally coupled grabber arms, driven by electric motors and gearing systems, including eccentric gearing, to facilitate the grasping and release of refuse containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic systems are used to actuate grabber assemblies, then grasping force and reliability are improved, but device complexity and environmental impact worsen
Solution Approach 1:
The patent replaces hydraulic actuation systems with electric motor-driven gear mechanisms. Specifically, electric motors coupled with gear trains (including planetary gears and rack-and-pinion mechanisms) provide the mechanical force needed to actuate the grabber arms, eliminating hydraulic pumps, hoses, and fluid reservoirs while maintaining reliable grasping capability through precise electrical control
Solution Approach 2:
The patent explicitly eliminates hydraulic systems from the grabber assembly by using electric motors and mechanical gearing instead. This substitution removes the need for hydraulic fluid, pumps, and associated components, thereby reducing device complexity and environmental impact while preserving the force and reliability needed for secure container handling
2Force
If hydraulic systems are used to actuate grabber assemblies, then grasping force is improved, but environmental impact worsens
Solution Approach 1:
The patent substitutes electric motor-driven mechanical systems for hydraulic systems, eliminating hydraulic fluid that can leak and harm the environment. The electric motors with gear mechanisms generate sufficient grasping force through mechanical advantage while producing no harmful fluid discharge, thereby reducing environmental impact while maintaining effective container handling
3Device complexity
If electric motors and gearing systems are used, then device complexity is reduced, but manufacturing precision requirements worsen
Solution Approach 1:
The patent employs standard electric motors coupled with conventional gear mechanisms (planetary gears, rack-and-pinion) that use well-established manufacturing processes. These off-the-shelf components with standardized tolerances achieve the required precision without demanding ultra-precise custom manufacturing, thereby reducing overall device complexity while meeting performance requirements through proven mechanical designs
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 grabber assembly provides secure and efficient container handling, reducing maintenance time and environmental impact while enhancing operational efficiency.
Implementation Method 1
an electric motor and a gear train coupling the electric motor to the first grabber arm to facilitate pivoting the first grabber arm
Implementation Method 2
The first gear is configured to rotate about an axis radially offset from a center thereof
Data Source
AI summary
A grabber assembly includes a first grabber arm, a second grabber arm, a motor, and a plurality of gears. The plurality of gears includes a first gear directly coupled to the electric motor, an intermediate gear coupled with the first gear, and an arm gear coupled with the first grabber arm and the intermediate gear to facilitate pivoting the first grabber arm. The first gear is configured to rotate about an axis radially offset from a center thereof.