Pivoting Guard Door Assembly for Easier Work Machine Cleaning
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Solution Overview
Problem
Conventional guard assemblies for work machines are cumbersome to clean due to heavy doors that require additional tools and equipment to open and close, increasing the time and effort needed for maintenance.
Innovation Solution
A guard assembly with a door that is removably coupled to the guard via a pivoting coupling arrangement, allowing for easy access and closure without the need for additional tools, where the door is lightweight and can be moved by a single person, utilizing a plate with fasteners and a coupling arrangement that includes a first and second portion for secure pivoting within retention tabs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional door is used to access the guard interior, then the guard can be sealed to protect components, but the door becomes heavy and requires additional tools and equipment to open and close
Solution Approach 1:
The door assembly is segmented into multiple components: a door panel, a coupling arrangement with first and second portions, retention tabs, and fasteners. This segmentation allows the door to be lightweight yet securely attachable, eliminating the need for heavy conventional doors while maintaining sealing effectiveness.
Solution Approach 2:
The coupling arrangement enables the door to dynamically transition between open and closed positions through pivoting motion. The first portion couples to the plate while the second portion receives retention tabs, allowing the door to be easily opened by service personnel without additional tools, yet remain securely closed during operation.
2Strength
If the guard is made heavy-duty to protect components, then component protection is improved, but the guard and door become too heavy for service personnel to handle
Solution Approach 1:
The door assembly is divided into lightweight components (door panel, coupling arrangement, retention tabs) that can be easily handled by service personnel. The guard body remains strong for protection, while the door components use optimized materials and structures to minimize weight without compromising function.
Solution Approach 2:
The door and coupling components are designed with optimized material properties and structural parameters to achieve high strength-to-weight ratios. The coupling arrangement uses precise geometric parameters to provide secure attachment with minimal material, reducing overall weight while maintaining protective functionality.
3Reliability
If additional fasteners and coupling mechanisms are added to secure the door, then the door attachment reliability is improved, but the complexity of the door assembly increases
Solution Approach 1:
The coupling arrangement merges multiple functions into a single integrated component: the first portion provides structural attachment to the door plate, while the second portion receives and engages with the retention tabs. This consolidation reduces the number of separate parts and simplifies the overall assembly while maintaining secure attachment reliability.
Solution Approach 2:
The coupling arrangement serves multiple functions simultaneously: it acts as a structural connector, a pivoting hinge for door movement, and a retention mechanism for securing the door in the closed position. This multi-functionality reduces the need for separate components, lowering assembly complexity while improving attachment reliability.
Data Source
AI summary
A guard assembly for a work machine includes at least one guard including a body. The body in part defines a volume, a first opening, at least one second opening, and at least one pair of first retention tabs. The door defines a first end and a second end. In an open position of the door, the door provides access to the volume and, in a closed position of the door, the door limits access to the volume. The door includes a plate removably coupled to the guard proximal to the first end of the door by at least one fastener, and at least one coupling arrangement extending from the plate for pivotably coupling the plate to the guard proximal to the second end of the door. The coupling arrangement includes a first portion coupled to the plate and a second portion extending from the first portion.