Combine Harvester GNSS Receiver Layout Near the Swivel Center
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Solution Overview
Problem
The positioning accuracy of work vehicles, such as combine harvesters, is limited due to the suboptimal placement of position measuring devices, which are not installed close to the swivel center, leading to increased positioning errors.
Innovation Solution
The position measuring device is positioned on the rear side of the cabin, along the upper edge of the roof portion, and supported by a bracket extending obliquely upward from the side wall, allowing it to be installed near the swivel center of the vehicle, thus improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position measuring device is installed in conventional locations (not near swivel center), then the installation is simple and space requirements are met, but the positioning accuracy deteriorates due to increased positioning error
Solution Approach 1:
The patent positions the receiving device in the vertical dimension (upwardly from the side surface) rather than only in horizontal planes, allowing placement near the swivel center without interfering with the cabin structure. This three-dimensional positioning resolves the contradiction by utilizing unused vertical space to achieve both accuracy and simplicity.
2Measurement precision
If the position measuring device is installed close to the swivel center, then positioning accuracy is improved, but the device may interfere with the cabin structure and installation becomes difficult
Solution Approach 1:
By moving the device installation from horizontal placement to vertical suspension below the cabin, the patent eliminates spatial interference with the cabin structure while maintaining proximity to the swivel center. This dimensional change enables easy installation without compromising positioning accuracy.
Solution Approach 2:
The patent introduces a support structure as an intermediary between the receiving device and the cabin, allowing the device to be positioned close to the swivel center while the support structure handles the complexity of mounting and cable management, thus improving installation ease.
3Ease of operation
If the position measuring device is placed in available space near the cabin, then installation is simplified, but the device cannot be positioned close to the swivel center, reducing positioning accuracy
Solution Approach 1:
The patent utilizes the vertical dimension below the cabin side surface, which is otherwise unused space, to position the receiving device close to the swivel center. This resolves the contradiction by making the optimal positioning location accessible without complicating the installation.
Data Source
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AI summary
[Problem]The present invention is to provide a work vehicle capable of utilizing a space surrounding a cabin in a configuration in which the cabin covering a driving section is installed and capable of installing a position measuring device in a position close to a swivel center of the vehicle so that positioning accuracy is improved. [Solution]A combine harvester serving as a work vehicle includes a cabin 16 covering a driving section, and a receiving device 81 for measuring a position in a work site based on positional information. The receiving device 81 is installed in a position on a rear side relative to a front-rear center position C0 in a front-rear direction of a machine body with respect to the cabin 16.