Integrated Grapple-Cone Splitter With Adaptive Hydraulic Control
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Solution Overview
Problem
Existing forestry and logging technologies lack efficient and safe methods for simultaneously engaging, holding, and splitting logs using a single apparatus, particularly for applications like firewood processing and biomass production.
Innovation Solution
A combination splitter and grapple apparatus that integrates a cone splitter with a grapple attachment, utilizing a unique electro-valve manifold to adapt hydraulic pressure and flow for both functions, allowing a single excavator to handle log splitting and transportation without leaving the cab.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single apparatus combines both grapple and splitter functions, then productivity and operational efficiency are improved, but device complexity increases due to integrating two distinct hydraulic systems
Solution Approach 1:
The patent combines a grapple assembly and a log splitter assembly into a single integrated apparatus mounted on an excavator. The grapple assembly includes fingers for engaging logs, while the log splitter assembly includes a splitting cone and hydraulic cylinder. This merging allows simultaneous or sequential log handling and splitting operations, improving productivity while managing complexity through unified mounting and coordinated hydraulic control.
Solution Approach 2:
The excavator serves as a universal platform that performs multiple functions: it provides the mounting structure for both the grapple and splitter assemblies, supplies hydraulic power to both functions, and enables the operator to perform log engagement, log splitting, and material transportation without leaving the cab. This multi-functionality approach consolidates equipment needs and enhances operational efficiency.
2Power
If high hydraulic pressure and flow are used for splitter operation, then splitting power is improved, but the grapple operation requires pressure adaptation to lower levels
Solution Approach 1:
The patent introduces a hydraulic valve assembly as an intermediary component between the excavator's hydraulic system and the grapple assembly. This valve assembly includes pressure relief valves and flow control valves that adapt the high-pressure, high-flow hydraulic output suitable for the powerful splitter operation down to the lower pressure and flow levels required by the grapple assembly, enabling both functions to operate at their optimal pressure ranges from a single hydraulic source.
Solution Approach 2:
The hydraulic valve assembly dynamically changes hydraulic parameters (pressure and flow rate) to match the requirements of different operational modes. When the grapple is actuated, the valve assembly reduces pressure and flow to appropriate levels for gripping operations, while allowing full high-pressure, high-flow capacity to the splitter when log splitting is required, thus optimizing power delivery for each function.
3Reliability
If the operator remains in the excavator cab for continuous operation, then safety is improved, but the ability to manually position and operate the splitter may be limited
Solution Approach 1:
The patent replaces manual mechanical positioning and operation with hydraulic actuation controlled from the excavator cab. The log splitter assembly includes a hydraulic cylinder that drives the splitting cone, and the grapple assembly includes hydraulic cylinders for finger actuation. All operations are controlled through the excavator's existing hydraulic control system, allowing the operator to remain safely in the cab while maintaining full control over positioning and operation through hydraulic valve control.
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 efficient and safe splitting of logs into smaller pieces while maintaining operational efficiency and safety, enhancing productivity in firewood processing, mulch yards, and land clearing operations.
Implementation Method 1
The apparatus includes a unique electro-valve manifold assembly that adapts the relatively high hydraulic pressure and flow utilized by the splitter to a lower pressure and flow utilized by the grapple.
Data Source
AI summary
A combination splitter and grapple for engaging, holding and transporting a log or group of logs or other material, and for splitting or otherwise breaking the log(s) into smaller pieces. The combination grapple and splitter is useful for processing firewood, tree services, mulch yards, land clearing, wood fuel processing, biomass, or other purposes.