Wood Chipper Winch Line Position Control System
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Solution Overview
Problem
Existing wood chippers face the issue of winch lines becoming entangled with the feed wheel assembly, leading to operational downtime and potential damage, as the winch line can accidentally be fed into the cutting mechanism during operation.
Innovation Solution
A control system that includes a detector to sense the position of the winch line, allowing operation of the feed wheels when the winch line is retracted and prohibiting winch operation, and allowing winch operation when the line is extended, thereby preventing entanglement and requiring no operator intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the winch line is extended to assist with positioning and feeding wood products, then the ease of operation is improved, but the winch line may become entangled in the feed wheel assembly and cutting mechanism, causing operational downtime and damage
Solution Approach 1:
The control system continuously monitors the position of the winch line through detectors and automatically adjusts the operation of feed wheels and cutting mechanism based on this feedback. When the winch line is detected to be in a position that could cause entanglement, the system automatically prevents operation of components that would create the hazard, thereby maintaining reliability while preserving ease of operation.
Solution Approach 2:
The control system acts as an intermediary between the winch operation and the feed wheel/cutting mechanism operation. It mediates their interaction by coordinating their activation based on winch line position, preventing direct harmful interaction while allowing both functions to be utilized for improved ease of operation.
2Productivity
If the winch line is extended to pull wood products to the chipper, then productivity is improved, but the risk of entanglement with the cutting mechanism increases, leading to machine damage and downtime
Solution Approach 1:
The control system takes preliminary anti-action by proactively preventing the harmful entanglement before it can occur. It monitors winch line position in advance and automatically disables or coordinates the feed wheel and cutting mechanism operations to avoid creating entanglement conditions, thereby maintaining productivity while eliminating the entanglement hazard.
Solution Approach 2:
Through continuous feedback monitoring of winch line position, the system dynamically adjusts operational parameters to maintain productivity while preventing the winch line from entering positions that would create entanglement hazards with the cutting mechanism.
3Reliability
If automatic control is implemented to prevent winch line entanglement, then reliability is improved, but the device complexity increases due to additional detectors and control systems
Solution Approach 1:
The control system is designed to perform multiple functions: it monitors winch line position, coordinates feed wheel operation, controls cutting mechanism activation, and prevents entanglement hazards. By consolidating these functions into a single integrated control system rather than separate devices, reliability is improved while device complexity is minimized.
Solution Approach 2:
The control system merges the functions of winch control, feed wheel control, and cutting mechanism control into a single integrated system. This consolidation improves reliability through coordinated operation while reducing overall device complexity by eliminating the need for multiple separate control devices and their interconnections.
Data Source
AI summary
A wood chipper includes a frame, an infeed system, a rotatable cutting system, and at least one feed wheel disposed between the infeed system and the cutting system to feed wood material to the cutting system. The wood chipper also includes a winch which includes a winch line having a first end, and a collar disposed adjacent the first end of the winch line. The wood chipper further includes a detector adapted to detect a first and a second position of the winch line, wherein the detector is adapted to allow operation of the at least one feed wheel and prohibit operation of the winch when the first position of the winch line is detected, and to allow operation of the winch and allow operation of the at least one feed wheel in a predefined manner when the second position is detected.