Hydraulic Fore-Wheel Suspension for Stable Paver Transport
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Solution Overview
Problem
Existing pavers experience undesired dynamic behavior during transport operations due to uneven load distribution between the rear and fore-wheels, leading to oscillations and instability.
Innovation Solution
A paver equipped with a hydraulic wheel suspension system and a hydraulic motion control assembly that provides selective hydraulic spring suspension and dampening to the fore-wheels, allowing for appropriate motion characteristics during both paving and transport modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the screed is raised during transport operation, then the paver can be moved to different locations, but the load distribution becomes uneven causing oscillations and instability
Solution Approach 1:
The patent applies a hydraulic wheel suspension system that dynamically adjusts the fore-wheels position and load distribution based on operational mode. During transport, the suspension system activates to provide hydraulic spring suspension and dampening, allowing the fore-wheels to move independently to absorb shocks and maintain stability, thus resolving the contradiction between mobility and stability.
Solution Approach 2:
The patent uses a hydraulic motion control assembly with hydraulic accumulators and dampers to control the fore-wheels suspension. The hydraulic system provides controlled spring suspension and dampening forces that stabilize the paver during transport operations, converting the instability caused by raised screed into a controlled dynamic response.
2Stability of the object's composition
If hydraulic spring suspension and dampening are provided during paving operation, then motion stability is improved, but the paving precision and ground contact accuracy deteriorate
Solution Approach 1:
The system dynamically switches between suspension modes based on operational state. During paving operations, the hydraulic motion control assembly deactivates the spring suspension and dampening, allowing the fore-wheels to maintain fixed, precise ground contact. The system only activates suspension during transport mode, thus avoiding any impact on paving precision while maintaining stability when needed.
Solution Approach 2:
The hydraulic motion control assembly periodically activates or deactivates the suspension system based on operational mode transitions. The system alternates between suspension-active (transport) and suspension-inactive (paving) states, ensuring that suspension benefits are obtained only when required and paving precision is maintained during operational phases.
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 solution ensures improved motion stability and control of the paver during transport, while maintaining optimal paving performance by selectively applying hydraulic suspension and dampening based on the operational mode.
Implementation Method 1
a hydraulic motion control assembly adapted to selectively provide hydraulic spring suspension and preferably also hydraulic dampening to at least one wheel, preferably at least two wheels, of the set of fore-wheels
Implementation Method 2
a hydraulic motion control assembly adapted to selectively provide hydraulic spring suspension and preferably also hydraulic dampening to at least one wheel, preferably at least two wheels, of the set of fore-wheels
Data Source
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AI summary
The present application relates to a paver (10) comprising a main vehicle body (12). The paver (10) comprises a set of fore-wheels (14). The set of fore-wheels (14) is connected to the main vehicle body (12) via a hydraulic wheel suspension system (20) which, in at least a paving mode of the paver (10), allows hydraulic level compensation for each wheel of the set of fore-wheels (14). The paver (10) further comprises a hydraulic motion control assembly (42) adapted to selectively provide hydraulic spring suspension and/or hydraulic dampening to at least one wheel, preferably at least two wheels, of the set of fore-wheels (14). The application relates also to a method for operating a paver (10).