Electric Refuse Grabber Gear Train for Reliable Container Gripping
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Solution Overview
Problem
Existing refuse vehicles lack efficient and environmentally friendly mechanisms for grasping and transporting waste containers, particularly in a fully-electric setup, which is crucial for reducing emissions and operational costs.
Innovation Solution
A fully-electric grabber assembly for refuse vehicles, incorporating a first and second grabber arm, an electric motor, and a gear system that facilitates pivoting and gripping of waste containers, utilizing electric motors and gear trains to rotate the arms independently or concurrently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fully-electric grabber assembly is implemented, then emissions are reduced and environmental friendliness is improved, but device complexity increases due to the need for electric motors and gear systems
Solution Approach 1:
The patent replaces traditional hydraulic systems with electric motors and gear mechanisms to operate the grabber arms. This substitution eliminates hydraulic fluids and associated emissions while using electrically-powered mechanical components (motors, gears, shafts) to achieve the same gripping and lifting functions, thereby reducing environmental harm at the cost of increased mechanical complexity
Solution Approach 2:
The patent changes the power source parameter from hydraulic (fluid-powered) to electric (electromechanical). This parameter change transforms the system from a hydraulic actuation system to an electrically-driven system with motors and gear trains, reducing emissions but increasing the complexity of electrical and mechanical components
2Productivity
If electric motors and gear trains are used to pivot grabber arms, then grasping efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the grabber assembly into multiple independently controllable segments (first grabber arm, second grabber arm, third grabber arm) each with its own electric motor and gear system. This segmentation allows precise control of each arm for efficient grasping of various container shapes and sizes, but increases manufacturing complexity as each segment requires separate motor-gear assemblies
Solution Approach 2:
The patent employs dynamically adjustable electric motor-driven gear systems that can pivot grabber arms through variable angles and speeds. This dynamic control capability enables the grabber to adapt to different container configurations efficiently, but requires complex manufacturing of motor mounts, gear housings, and adjustable linkages
3Reliability
If a gear system with radially offset axis is used, then gripping reliability is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediate gear component with a radially offset axis that mediates between the electric motor's rotational output and the grabber arm's pivoting motion. This intermediary gear arrangement provides reliable torque transmission and controlled movement, but adds complexity by requiring precise alignment and mounting of the offset-axis gear
Solution Approach 2:
The gear system with radially offset axis performs preliminary mechanical advantage multiplication before the final gripping action. The offset gear arrangement pre-configures the force vector and mechanical advantage to ensure reliable gripping, but requires complex preliminary assembly and alignment of the gear train
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 and reliable grasping and transport of waste containers with reduced emissions and maintenance requirements, enhancing operational efficiency and cost-effectiveness.
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 gear train includes a first gear rotatably coupled with the carriage about an axis radially offset from a center of the first gear, and one or more second gears coupling the first gear to the first grabber arm
Data Source
AI summary
A fully-electric grabber assembly includes a first grabber arm, a second grabber arm, an electric motor, and a plurality of gears. The plurality of gears includes a first gear coupled with 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.