Floor Suspension System for Material Handling Vehicle Vibration Isolation
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Solution Overview
Problem
Material handling vehicles, such as center riding pallet trucks, often fail to adequately absorb vibrations experienced by operators due to the rigidity of rubber mounts, which do not sufficiently isolate the floor from vibrations when traveling over rough or uneven surfaces.
Innovation Solution
A floor suspension system is introduced, comprising coupling assemblies and spring assemblies that pivotally couple the battery compartment and operator compartment to the fork frame, allowing vertical displacement and counterbalancing the operator compartment with the weight of the battery, thereby isolating the operator from vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rubber mounts are used to provide vibration absorption, then some vibration isolation is achieved, but the mounts are too rigid to sufficiently isolate the floor from vibration
Solution Approach 1:
The patent changes the physical parameters of the mounting system by replacing solid rubber mounts with a spring-based suspension system. The spring assemblies have configurable spring rates that can be adjusted to optimize vibration isolation while maintaining structural support. This parameter change transforms the mounting system from rigid to compliant, achieving superior vibration isolation.
Solution Approach 2:
The patent employs composite mounting assemblies that combine springs with dampers or other vibration control elements. This composite approach integrates the load-bearing function of the springs with the vibration-damping function of the dampers, achieving both structural support and enhanced vibration isolation that neither component could achieve alone.
2Object-affected harmful factors
If a floor suspension system with spring assemblies is implemented, then vibration absorption is enhanced, but the device complexity increases
Solution Approach 1:
The patent divides the mounting system into separate functional modules: spring assemblies for vibration isolation, dampers for energy dissipation, and mounting brackets for structural attachment. This segmentation allows each component to be optimized independently and facilitates easier maintenance and replacement, reducing the practical complexity despite the increased number of parts.
Solution Approach 2:
The floor suspension system is designed to perform multiple functions simultaneously: supporting the floor structure, isolating vibrations, and providing adjustable damping. The coupling assemblies and spring-damper combinations are engineered to handle both static loads and dynamic vibrations, reducing the need for separate specialized components.
3Stability of the object's composition
If coupling assemblies with pivot arms are used to connect compartments to the fork frame, then the operator compartment can be counterbalanced with the battery, but the coupling mechanism becomes more complex
Solution Approach 1:
The patent positions the battery compartment and operator compartment on opposite sides of the fork frame, using the weight of the battery to counterbalance the operator and their equipment. The pivot arm coupling assemblies enable this counterbalancing arrangement while allowing controlled movement, achieving stable weight distribution without requiring active balancing mechanisms.
Solution Approach 2:
The coupling assemblies incorporate pivot arms that allow dynamic adjustment of compartment positions. This dynamic capability enables the system to adapt to varying load conditions while maintaining counterbalance, and the pivot mechanism provides inherent mechanical advantage that reduces the complexity of achieving stable weight distribution.
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 floor suspension system effectively reduces operator exposure to vibrations by allowing the battery compartment and operator compartment to displace vertically, improving ride quality and reducing the impact of uneven surfaces on the operator.
Implementation Method 1
one or more spring assemblies each having a spring pack pivotally coupled to the fork frame and the battery compartment
Implementation Method 2
The pivotal coupling of the battery compartment and the operator compartment via the first and second coupling assemblies enable the weight of the battery to counterbalance the operator compartment
Data Source
AI summary
A floor suspension system for a material handling vehicle is provided. The floor suspension system includes one or more coupling assemblies to couple a battery compartment and an operator compartment of the material handling vehicle to a fork frame of the material handling vehicle. The one or more coupling assemblies each include a first pivot arm to pivotally couple the battery compartment to the fork frame, a second pivot arm to pivotally couple the operator compartment to the fork frame, and a coupling arm to couple the first pivot arm to the second pivot arm. The floor suspension system further includes a spring assembly having a spring pack pivotally coupled to the fork frame and the battery compartment.