Electric Linear Actuator Hopper Door Mechanism
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Solution Overview
Problem
Conventional sliding door designs for hopper trailers are difficult to operate when fully loaded with bulk materials, and existing hydraulic automated designs are cumbersome, noisy, and require significant hardware and expertise.
Innovation Solution
A motorized linear actuator system with electric motors and extendable/retractable rods, mounted on support rails and connected to a bracket that controls the hopper door, allowing for remote operation and easy installation without hydraulic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional sliding door design with hand crank is used, then the structure is simple, but it is difficult to operate when the trailer is fully loaded with bulk materials
Solution Approach 1:
The patent replaces the manual hand crank mechanical system with an electric motor-driven linear actuator system. The linear actuator converts rotational motion from the electric motor into linear motion to move the door, eliminating the need for manual cranking while maintaining mechanical simplicity through the use of standard linear actuator components.
Solution Approach 2:
The door opening system serves itself by using an electric motor and linear actuator to automatically move the door without requiring manual intervention. The system can be controlled remotely or automatically, allowing the door to open and close on its own without human physical effort.
2Extent of automation
If hydraulic automated door opening systems are used, then door operation is automated, but the system becomes noisy and requires significant hardware and expertise
Solution Approach 1:
The patent substitutes the hydraulic mechanical system with an electric linear actuator system. Instead of using hydraulic fluid, pumps, valves, and cylinders, the invention uses an electric motor coupled with a linear actuator mechanism (such as a ball screw, lead screw, or rack and pinion) to achieve the same door movement function with simpler, cleaner, and quieter operation.
Solution Approach 2:
The patent avoids using hydraulics entirely and instead employs an electrically-driven linear actuator system. This substitution eliminates the need for hydraulic fluid, pressure systems, and associated complex hardware, while achieving automated door operation through electrical actuation of the linear motion mechanism.
3Extent of automation
If hydraulic systems are used for automated door operation, then automation is achieved, but the system requires pressure to be maintained even when not in operation
Solution Approach 1:
The patent replaces the hydraulic pressure maintenance requirement with an electrically-driven linear actuator system that consumes energy only during door movement. The electric motor and linear actuator mechanism do not require continuous energy input or pressure maintenance when the door is stationary, eliminating the standby energy consumption inherent in hydraulic systems.
Solution Approach 2:
The electric linear actuator system operates periodically only when door movement is required, rather than maintaining continuous pressure or energy state. The motor activates briefly to move the door to the desired position and then remains inactive, consuming minimal energy during idle periods compared to hydraulic systems that must maintain pressure continuously.
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 quick, safe, and efficient opening and closing of the hopper door, reducing manual effort and eliminating the need for hydraulic systems, with quieter and more environmentally friendly operation.
Implementation Method 1
A pair of linear actuators each having an electric motor electrically connected to a power source
Implementation Method 2
each having an extendable and retractable actuator rod... selectively activates the linear actuators to extend the rods and thereby move the door
Data Source
AI summary
A hopper door opening and closing apparatus operates a door on a hopper discharge opening. A pair of motorized linear actuators, each having an extendable rod, are mounted to support rails on opposite sides of the door. A bracket connects the rods to the door. A controller selectively activates the linear actuators to extend the rods and thereby move the door to an open position that permits material to flow through the lower opening and selectively activates the linear actuators to retract rods and thereby move the door to a closed position covering the lower opening.