Electric Cart Traction Motor Controller for Heavy Load Transport
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Solution Overview
Problem
Conventional methods for transporting heavy loads on factory floors, such as conveyors and fork trucks, often exceed ergonometric guidelines when loads exceed 2000 pounds, and lack efficient, cost-effective, and environmentally friendly solutions for navigating undefined paths.
Innovation Solution
A manually steered, electric-powered cart with a traction motor, onboard batteries, and a controller for direction and speed selection, supported on caster wheels, allowing for flexible and safe movement of heavy loads without noxious exhaust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional conveyors or fork trucks are used to transport heavy loads, then the load can be moved, but the operation exceeds ergonometric guidelines and incurs high cost
Solution Approach 1:
The patent replaces conventional mechanical transport systems (fork trucks, conveyors) with a simplified electric cart system that uses a traction motor directly connected to caster wheels, eliminating the need for complex mechanical lifting and steering mechanisms while maintaining heavy load transport capability
Solution Approach 2:
The patent changes the power delivery parameters by using a controller that adjusts motor output based on operational needs, enabling the cart to handle loads up to one ton while operating within ergonomic guidelines and reducing overall system cost
2Productivity
If conventional transport methods are used for heavy loads, then the load can be moved, but noxious exhaust gas is produced
Solution Approach 1:
The patent replaces internal combustion engine-based transport systems with an electric traction motor system that draws power from onboard batteries, completely eliminating the production of noxious exhaust gases while maintaining the ability to transport heavy loads
3Object-generated harmful factors
If a vehicle operates under electric power with onboard batteries, then no noxious exhaust is produced, but the power source requires recharging at convenient locations
Solution Approach 1:
The patent implements a self-service recharging system where the cart can be quickly recharged at convenient factory locations through accessible power sources, allowing operational personnel to independently service the vehicle without specialized maintenance equipment or procedures
4Adaptability or versatility
If the cart is steered manually on caster wheels, then the cart provides flexibility for undefined paths, but the cart requires operator control for direction and speed
Solution Approach 1:
The patent segments the control functions into distinct operational modes (direction selection and speed selection) that the operator can independently control, simplifying the overall control system while maintaining full adaptability for navigating undefined paths
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 cart provides high flexibility and safety at a lower cost than conventional methods, enabling efficient movement of loads up to one ton while meeting safety specifications and reducing operational complexity.
Implementation Method 1
a drive system including a traction motor connected to the power source for driving a wheel secured to the frame and contacting ground
Data Source
AI summary
A cart for moving loads includes a frame supported on wheels, a source of electric power supported on the frame, a drive system including a traction motor connected to the power source for driving a wheel secured to the frame and contacting ground, and a controller for adjusting a rotary direction of the drive wheel in response to selected states of an input to the controller.