Forwarder Headboard Gate Tilt Mechanism for Visibility and Access
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Solution Overview
Problem
The existing log forwarder machines face challenges with restricted visibility of the payload bay during operation and limited access to machine components for service due to the positioning of the load gate, which can cause damage and interfere with the boom's movement.
Innovation Solution
A headboard assembly with a stationary and moveable gate, connected via a linear actuator, allows for adjustable height and tilt, enhancing visibility during operation and providing improved access to machine components during service by selectively extending and retracting the moveable gate and tilting the headboard assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the load gate is positioned adjacent to the base of the boom to protect components, then component protection is improved, but access to components for service is restricted and visibility of the payload bay is reduced
Solution Approach 1:
The headboard assembly is made dynamically reconfigurable through a tilt mechanism that allows it to switch between an operating position (providing protection) and a service position (providing access). The assembly can be tilted relative to the frame using a hydraulic cylinder, enabling operators to access components behind the boom base when needed while maintaining its protective function during normal operation.
Solution Approach 2:
The headboard assembly is introduced as a new structural element in the spatial arrangement between the payload bay and operator cab. By positioning this assembly in a third dimension (between existing components rather than merely adjacent to them), the patent achieves component protection without completely blocking access paths, as the assembly can be tilted out of the way when service is required.
2Reliability
If the load gate is positioned adjacent to the base of the boom to protect components, then component protection is improved, but visibility of the payload bay during loading and unloading is reduced
Solution Approach 1:
The headboard assembly's visibility-blocking effect is dynamically controlled through its tilting capability. During normal loading operations, the assembly can be tilted to an optimal angle that provides necessary component protection while minimizing obstruction of the operator's view of the payload bay, unlike a fixed gate structure.
3Device complexity
If a single linear actuator is used to control both gate extension and headboard tilting, then device complexity is reduced, but the actuator must perform multiple functions increasing operational complexity
Solution Approach 1:
A single linear actuator is designed to perform multiple functions: extending and retracting the moveable gate relative to the stationary gate, and tilting the entire headboard assembly relative to the frame. This multi-functional actuator reduces the total number of hydraulic components while the control system manages the different operations through sequential or conditional activation.
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 improves operator visibility during loading and unloading while allowing for better access to machine components for maintenance, reducing the risk of damage and enhancing operational efficiency and safety.
Implementation Method 1
A linear actuator pivotally connects the moveable gate to the frame via first and second pin joints. The linear actuator selectively extends and retracts the moveable gate relative to the stationary gate
Implementation Method 2
The linear actuator is further arranged to selectively tilt the headboard assembly relative to the frame when the headboard assembly is in a service position
Implementation Method 3
a moveable gate disposed in slidable engagement with the stationary gate
Data Source
AI summary
A headboard assembly connected to a machine frame includes a stationary gate that is pivotally connected to the frame and a moveable gate disposed in slidable engagement with the stationary gate. A linear actuator pivotally connects the moveable gate to the frame via first and second pin joints. The linear actuator selectively extends and retracts the moveable gate relative to the stationary gate when the headboard assembly is in an operating position. The linear actuator is further arranged to selectively tilt the headboard assembly relative to the frame when the headboard assembly is in a service position.