Rotational Bonnet Hood for Working Machine Maintenance Access
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Solution Overview
Problem
Existing working machines with large, high bonnets face challenges in maintenance due to structural integration with the machine room cover, making it difficult to access and inspect components, particularly when the bonnet projects significantly outward, requiring time and effort for maintenance tasks.
Innovation Solution
A working machine design featuring a bonnet with a frame-like raising member that can be rotationally opened and closed, allowing for easy adjustment of the bonnet's height and facilitating maintenance by separating the hood member from the raising member, which can be detachable and include a window for improved access and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the bonnet is made large and high to house the cooler, then the cooler can be accommodated, but the maintenance of components becomes difficult due to structural integration with the machine room cover
Solution Approach 1:
The bonnet is divided into two separate components: the raising member (frame-like structure) and the hood member (dome-like cover). The hood member can be rotationally opened and closed independently, allowing maintenance personnel to access components housed within the bonnet without removing the entire structure. This segmentation resolves the contradiction by maintaining the required volume while improving maintenance accessibility.
2Volume of stationary object
If a large-sized bonnet is made by joining multiple steel sheets by welding, then the bonnet can be constructed, but the strength of welding areas deteriorates and the number of processes and components increases
Solution Approach 1:
The bonnet is segmented into the raising member and hood member, which are separate components that can be manufactured independently using standard pressing processes without requiring welding of multiple sheets. This reduces the number of components and manufacturing processes while achieving the required volume through the combination of these two main parts.
Solution Approach 2:
The raising member serves multiple functions: it provides the structural frame, supports the hood member, and enables rotational movement. The hood member serves as both the protective cover and the access door. This multi-functionality reduces the need for additional components that would otherwise be required to achieve the same volume and functionality.
3Length of stationary object
If the bonnet significantly projects from the machine room, then the cooler can be housed, but the inside of the hood becomes difficult to check and reach for maintenance work
Solution Approach 1:
The hood member is separated from the raising member and can rotate independently. This allows the hood member to be opened like a door, providing direct access to the interior space for maintenance work. The segmentation enables the bonnet to project significantly while maintaining ease of operation through rotational opening of the hood member.
Solution Approach 2:
The hood member is designed to be dynamic rather than fixed, allowing it to rotate open and closed. This dynamic characteristic enables maintenance personnel to access the interior of the projecting bonnet easily, resolving the contradiction between height and maintenance workability.
Data Source
Figure 1
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AI summary
A working machine has a machine room cover (15) and a bonnet (50) on an upper rotating body (2). The bonnet (50) has a frame-like raising member (51) and a dome-like hood member (52) that covers an opening in the upper part of the raising member (51). The lower part of the raising member (51) is attached so as to surround an opening portion (35) formed in the upper surface of the machine room cover (15), and the hood member (52) is attached to the raising member (51) so as to be able to be rotationally opened and closed.