U-Shaped Gate Frame for Bulldozer Cab Mounting
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Solution Overview
Problem
Conventional frame structures for construction machines do not accommodate a cab with a rollover protective structure (ROPS), lacking the necessary space for mount and stopper units, which compromises the machine's strength and stability.
Innovation Solution
A frame structure featuring a U-shaped gate frame installed on top of the main frame, with mount and stopper units on the upper surface of the beam connecting the gate frame's columns, allowing for the secure mounting of a cab with ROPS and enhancing the machine's strength by providing additional support and vibration reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional main frame structure is used, then the frame structure is simple, but there is insufficient space to mount a cab with ROPS and its required mount and stopper units
Solution Approach 1:
The frame structure is divided into two segments: the main frame and the gate frame. The gate frame is a separate U-shaped structure that is mounted on top of the main frame. This segmentation allows the gate frame to provide dedicated mounting space for the cab with ROPS, while the main frame maintains its original simple structure for other components.
Solution Approach 2:
The gate frame utilizes the vertical dimension by being positioned on top of the main frame. The beam of the gate frame extends horizontally above the main frame, creating a new mounting plane that does not interfere with the main frame's structure. This dimensional approach provides the necessary space for mount and stopper units without complicating the base frame structure.
2Strength
If mount and stopper units are added to accommodate ROPS, then the strength and stability increase, but the frame structure becomes more complex
Solution Approach 1:
The mount units and stopper units are merged into a single integrated gate frame structure. Instead of adding separate reinforcement elements to the main frame, the gate frame combines both mounting functions in one unified component that attaches to the main frame and provides all necessary attachment points for the cab with ROPS.
Solution Approach 2:
The gate frame serves as an intermediary structure between the main frame and the cab with ROPS. It mediates the connection by providing a dedicated interface that handles all mounting and stopping functions, thereby protecting the main frame from direct structural modifications while still achieving the required strength and stability.
3Area of stationary object
If the gate frame is added on top of the main frame, then space for mount and stopper units is provided, but the overall height increases
Solution Approach 1:
The gate frame provides mounting space locally at the top rear section of the frame structure, rather than requiring uniform height increases throughout the entire frame. The beam of the gate frame is positioned specifically where the cab with ROPS needs mounting space, concentrating the height increase only where necessary for the mounting function.
Data Source
AI summary
A bulldozer is provided with a boat shaped main frame and a substantially U-shaped gate frame as a frame structure that mounts a cap having a rollover protection structure (ROPS) and forms the skeleton of the bulldozer. The gate frame is installed on the upper portion of the main frame, has a pair of left and right columns that are disposed along a substantially vertical direction, and has a beam that connects the upper ends thereof. Mount units for mounting the cab and stopper units for firmly grasping the cab are arranged on the upper surface of the beam.