Hydraulic Excavator GNSS Antenna Mounting Position Optimization
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Solution Overview
Problem
Hydraulic excavators equipped with RTK-GNSS antennas installed on counterweights experience high acceleration during rotation, leading to increased breakdowns due to their distance from the revolving center.
Innovation Solution
Positioning the antenna supporting parts ¼ or more of the vehicle width from the revolving center and closer to it than the counterweight, allowing the antennas to be placed on the machine compartment, cab, or steps, reducing acceleration and improving positioning precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the antennas are installed on the counterweight, then the antennas are positioned far away from the revolving center, but the antennas undergo large acceleration during rotation and are more likely to break down
Solution Approach 1:
The patent changes the installation position parameter of the antennas from the counterweight to the machine compartment, specifically positioning them between 1/4 or more of the vehicle width from the revolving center. This parameter change reduces the radius of rotation, thereby reducing centrifugal acceleration and improving reliability while maintaining sufficient positioning precision.
2Reliability
If the antenna supporting parts are positioned closer to the revolving center, then acceleration is reduced and operation is stabilized, but the distance between antennas decreases
Solution Approach 1:
The patent optimizes the distance parameter from the revolving center to be 1/4 or more of the vehicle width. This parameter setting ensures that the antennas are close enough to reduce acceleration and improve reliability, while maintaining sufficient separation distance to achieve accurate positioning precision.
3Reliability
If the antenna supporting parts are positioned on the machine compartment, cab, or steps, then the antennas do not protrude to the outside and contact with obstructions is avoided, but the supporting parts must be compact
Solution Approach 1:
The patent integrates the antenna supporting parts within the existing structural components of the excavator (machine compartment, cab, or steps), nesting the antenna mounting function within these existing structures. This eliminates the need for separate protruding supporting parts, protecting the antennas from obstructions while maintaining a compact design.
Data Source
AI summary
A hydraulic excavator basically includes a counterweight, an engine compartment, an equipment compartment, a cab, a plurality of steps, a passage and a pair of antenna supporting parts for supporting a pair of GNSS antennas, respectively. The antenna supporting parts are positioned ¼ or more of the vehicle width away from the revolving center and are positioned closer to the revolving center than a left rear edge of the passage. The left rear edge of the passage is the position furthest away from the revolving center of the steps and the passage.