Firewood Splitter Chute Adjustment to Cut Energy and Jamming
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Solution Overview
Problem
Existing firewood splitting machines face inefficiencies in energy consumption and wood waste due to the orthotropic nature of wood, leading to increased forces and energy consumption when cutting blades deviate from the natural structure, and are often bulky and difficult to transport.
Innovation Solution
A firewood splitting machine with a self-standing frame and adjustable distance between a primary cutting blade and a splitting chute, guided by springs, allowing the distance to change based on wood thickness and structure, minimizing energy consumption and preventing jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cutting blade is used for splitting timber sections, then the machine structure is simple, but productivity is low and energy consumption is high due to numerous strokes required
Solution Approach 1:
The cutting blade is segmented into multiple independent cutting edges arranged along its length. Each cutting edge can independently engage with the timber section, allowing multiple splits to occur in a single stroke rather than requiring sequential strokes with a single edge blade.
Solution Approach 2:
The cutting blade transitions from a single-point contact tool to a distributed contact tool by arranging multiple cutting edges along the blade length. This dimensional expansion allows simultaneous engagement with multiple points on the timber section, increasing productivity without proportionally increasing machine complexity.
2Productivity
If the cutting blade operates at high speed to improve productivity, then output increases, but energy consumption increases and wood waste increases when the blade deviates from the natural wood structure
Solution Approach 1:
The cutting blade is designed with varying properties along its length to match the local characteristics of the wood structure. Different sections of the blade can be optimized for different wood densities and grain directions, allowing efficient cutting throughout the timber section without requiring excessive force or energy at any particular point.
Solution Approach 2:
The blade is designed to dynamically adapt its cutting path and engagement points during operation. By allowing the blade to flex and adjust its position, it can follow the natural grain and annual rings of the wood, maintaining optimal cutting angles and reducing energy consumption even at high operating speeds.
3Productivity
If multiple cutting blades are used to improve productivity, then splitting speed increases, but the machine becomes bulky and difficult to transport
Solution Approach 1:
Multiple cutting functions are merged into a single integrated blade structure rather than using separate blades. The blade incorporates multiple cutting edges and functional zones in one component, achieving the productivity benefits of multiple blades while maintaining a compact, transportable machine design.
Solution Approach 2:
The single blade is designed to perform multiple cutting functions simultaneously - it can split wood of varying densities, accommodate different grain directions, and handle various timber section sizes. This multi-functionality replaces the need for multiple specialized blades, reducing machine weight and improving portability.
4Use of energy by moving object
If the cutting blade follows the natural wood structure to reduce energy consumption, then efficiency improves, but the machine requires complex adjustment mechanisms to adapt to varying wood properties
Solution Approach 1:
The blade and supporting structure are designed to automatically adapt to the wood's natural structure during operation. The system uses the wood's own geometry and properties to guide the cutting process, eliminating the need for complex external adjustment mechanisms while maintaining low energy consumption through grain-following cutting paths.
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 machine efficiently splits wood with minimal energy consumption and reduced waste by adapting to the wood's natural structure, maintaining mobility and reducing the risk of jamming.
Implementation Method 1
The splitting chute is guided by means of guiding members and is simultaneously supported by springs, so that it is displaceable in a direction towards the ground
Data Source
Figure 1~6
Figure 2
Figure 3
AI summary
A firewood splitting machine is intended for splitting of longitudinal timber sections (H) in order to produce firewood pieces (HF), and comprises a splitting unit (6), which is driven by hydraulic driving means (101, 102) and is by means of guiding members (61, 62) guided along the longitudinal geometric axis (X) of the bearing framework (1). Said splitting unit (6) comprises at least a splitting tool (60), which is moveable to and from along said longitudinal geometric axis (X) of the bearing frame (1), and a primary cutting blade (600) of which is located in the third level (N3), which is at a pre-determined distance in a direction apart from the ground, which is selected in dependency on each selected thickness of firewood pieces (HF), spaced apart from the bottom surface (101') of the operational area (100) of the machine in the first level (N1). A splitting chute (4) is located in the fourth level (N4) at a distance apart from the ground (P), which is for thickness of firewood pieces (HF) smaller than the distance between the cutting blade (600) of the splitting tool (60) and the ground (P). When observed in a direction of the operational stroke i.e. from the conveying unit (2) towards the terminal limiting member (3), the splitting chute (4) is arranged in front of the splitting tool (60). The splitting chute (4) is simultaneously with the splitting tool (6), and also in the same direction, displaceable along said horizontal axis (X), and is moreover also displaceable in vertical direction (Y) relatively to the splitting tool (60) and the bearing frame (1), namely either towards the ground (P) or in opposite direction, so that during displacing of the splitting tool (60) and the splitting chute (4), the distance between the splitting chute (4) and the primary cutting blade (600) of the splitting tool (60) is all the time changeable within a pre-determined range.