Hydraulic Excavator Camera Mounting with Segmented Handrail
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Solution Overview
Problem
The arrangement of a camera on a hydraulic excavator is restricted by the handrail, leading to insufficient monitoring of the lateral side of the revolving unit.
Innovation Solution
The camera is installed on the lateral edge of the revolving unit with support members that allow it to be positioned outside the handrail, enabling unrestricted placement and improved visibility, while the handrail members are designed to overlap and provide a broader access passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handrail is installed on the lateral edge of the revolving unit, then operator safety and access are improved, but the camera arrangement is restricted
Solution Approach 1:
The handrail is divided into multiple segments (first handrail member, second handrail member, third handrail member) connected by support members. This segmentation creates spatial intervals between handrail components, allowing the camera to be positioned in the gaps between segments without being obstructed by the overall handrail structure.
Solution Approach 2:
The camera is positioned within the spatial structure formed by the handrail segments, effectively nesting the camera installation space within the handrail assembly's configuration. The camera occupies the space between handrail members rather than requiring additional external space.
2Reliability
If the camera is positioned on the lateral edge of the revolving unit, then monitoring capability is improved, but the camera may conflict with the handrail structure
Solution Approach 1:
The handrail members are positioned at specific locations (first support member, second support member, third support member) to create localized open spaces along the lateral edge. The camera is specifically positioned in one of these localized gaps, allowing monitoring coverage without structural conflict at that precise location.
Solution Approach 2:
The camera is arranged in the vertical dimension between the upper and lower handrail members, utilizing the vertical space created by the handrail's three-dimensional structure. This dimensional arrangement allows the camera to be positioned on the lateral edge without horizontal conflict with the handrail.
3Area of stationary object
If the handrail members are arranged to overlap, then a broader access passage is created, but the camera positioning space is reduced
Solution Approach 1:
The handrail is segmented into multiple members arranged in overlapping vertical layers. This segmentation creates horizontal overlap that widens the access passage while maintaining vertical gaps between segments where the camera can be positioned.
Solution Approach 2:
The camera positioning problem is solved by transitioning from horizontal space utilization to vertical space utilization. The camera is positioned in the vertical gap between handrail members rather than requiring horizontal space, allowing the handrail members to overlap horizontally for broader access while the camera occupies vertical space.
Data Source
AI summary
Provided is a hydraulic excavator that enables arrangement of a camera at an appropriate position on a lateral edge of a revolving unit. The camera is installed on the lateral edge of the upper surface of the revolving unit. A handrail is attached to the upper surface of the revolving unit. The handrail includes a first handrail member extending in the front-rear direction of the revolving unit, and a first support member supporting the first handrail member on the revolving unit. The camera and the first support member are adjacent to each other in the tight-left direction of the revolving unit, and the first support member is arranged inward relative to the camera.