Variable Counterweight System for Material Handling Vehicle Stability
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Solution Overview
Problem
Existing material handling vehicles lack a variable counterweight system that can adjust its position based on the vertical position of attachments like buckets or booms to maintain stability and maximize operational safety by minimizing the center of gravity and avoiding obstructions for the operator.
Innovation Solution
A variable counterweight system that includes a movable counterweight and linear transfer devices, such as chains or belts, driven by hydraulic, electric, or pneumatic motors, which can be positioned between the front and rear of the vehicle based on the vertical position of attachments, using sensors and a control unit to optimize counterweight placement for stability and operational effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the counterweight is positioned at the rear of the vehicle, then the center of gravity is minimized for stability, but the downward force to the bucket or attachment is reduced
Solution Approach 1:
The counterweight system is made dynamically adjustable, allowing it to move between front and rear positions on the vehicle chassis. This dynamic repositioning enables the system to optimize the balance between stability and downward force application based on the operational requirements, resolving the contradiction between maintaining low center of gravity and maximizing bucket force.
2Force
If the counterweight is positioned at the front of the vehicle, then the downward force to the bucket is maximized, but the center of gravity increases reducing stability
Solution Approach 1:
The system employs dynamic repositioning of the counterweight along the vehicle chassis, allowing operators to position the counterweight at the front when maximum downward force is needed for bucket operations, and move it to the rear when stability is the priority, thus resolving the force-stability tradeoff.
3Device complexity
If a fixed counterweight system is used, then the device complexity is low, but the adaptability to different operational modes is reduced
Solution Approach 1:
The counterweight system transitions from a fixed configuration to a dynamically adjustable one, capable of repositioning along the vehicle chassis. This dynamic capability provides adaptability to different operational modes (lifting vs. pushing/downward force applications) while maintaining reasonable system complexity through the use of a linear transfer device with motor control.
Solution Approach 2:
The system changes the positional parameter of the counterweight along the vehicle chassis based on operational requirements. By adjusting the counterweight position parameter, the system adapts to different operational modes, enabling both lifting operations and downward force applications with appropriate stability characteristics.
4Adaptability or versatility
If a variable counterweight system is implemented, then the adaptability to different operational modes is improved, but the device complexity increases
Solution Approach 1:
The system implements dynamic repositioning capability through a linear transfer device that moves the counterweight along the vehicle chassis. This dynamic mechanism provides the necessary adaptability for different operational modes while controlling complexity through the use of standardized components and automated control systems.
Solution Approach 2:
The counterweight system incorporates automated control through sensors that detect the vertical position of the attachment and automatically adjust the counterweight position accordingly. This self-service capability reduces the complexity of manual operation and enables the system to adapt to different operational modes autonomously based on sensor feedback.
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 system enhances operational safety and stability by dynamically adjusting the counterweight's position to match the vehicle's operational mode, maximizing downward force when needed and minimizing the center of gravity, thus improving the vehicle's balance and reducing the risk of accidents or operational hazards.
Implementation Method 1
The moving track is retained on rotary axles. The rotary axles are preferably retained by a guide track. The moving track if preferably retained in the guide track.
Implementation Method 2
The drive device is preferably a hydraulic, electric or pneumatic motor.
Implementation Method 3
The drive device is preferably a hydraulic, electric or pneumatic motor.
Implementation Method 4
At least one vertical sensor determines the position of a boom. At least one horizontal sensor determines the position of the counterweight relative to the vehicle.
Data Source
AI summary
A movable counterweight system moves under a material-handling vehicle to provide a safe low center of gravity, and avoid interference to the operator.