Controller Ground Structure with Dedicated Terminal Access
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Solution Overview
Problem
Conventional ground structures for controllers in construction machines require time-consuming maintenance and may result in unstable grounding due to hidden terminals and complex bolt detachment procedures, leading to potential connection failures.
Innovation Solution
A ground structure with a dedicated connecting portion for the ground cable near the connector receiver hole on the controller case, allowing for easier detachment and reconnection, and featuring heat release fins that protect the connectors from damage during maintenance, ensuring stable grounding and improved heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ground cable terminal is fastened to the attachment board together with the case mount, then the grounding connection is established, but the terminal becomes hidden and inaccessible for maintenance
Solution Approach 1:
The patent divides the fastening function into two separate locations: the case mount fastens the case to the attachment board, while a dedicated connecting portion on the case fastens the ground cable terminal. This segmentation allows the terminal to be accessed and maintained independently without detaching the entire case, resolving the contradiction between connection stability and maintenance accessibility.
Solution Approach 2:
The connecting portion acts as an intermediary element between the case and the ground cable terminal. It provides a dedicated interface for terminal attachment that is visually accessible and easily maintainable, while still ensuring stable electrical connection to the case ground, thus solving both the reliability and ease of repair requirements.
2Reliability
If the ground cable terminal is fastened together with the case mount, then the grounding is established, but much time is required for maintenance due to complete cable harness detachment
Solution Approach 1:
By separating the terminal fastening function from the case mounting function, the patent enables maintenance workers to access and service the ground cable terminal independently. This eliminates the time-consuming process of completely detaching the cable harness and case, significantly reducing maintenance time while preserving grounding reliability.
Solution Approach 2:
The connecting portion is pre-designed and positioned on the case to provide easy access to the terminal. This preliminary arrangement of the fastening structure allows for quick terminal detachment and reattachment during maintenance, preventing the need for complex disassembly procedures and reducing overall maintenance time.
3Device complexity
If the terminal is hidden during fastening, then the compact structure is maintained, but visual verification of connection is difficult and connection stability is compromised
Solution Approach 1:
The patent applies local quality by creating a specific region (the connecting portion) with different characteristics from the rest of the case. This connecting portion is designed to be visually accessible and expose the terminal, while other parts of the case maintain their compact structure. This localized modification solves the visibility issue without compromising overall structural simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates faster and more reliable maintenance by allowing visual verification of connections and reduces the risk of connector damage, while maintaining effective heat radiation performance.
Implementation Method 1
a plurality of heat release fins are provided on the surface
Implementation Method 2
heat release fins... maintaining effective heat radiation performance
Implementation Method 3
the ground cable is fastened to the attachment board through a terminal attached to an end thereof together with a mount of the case, so that the case is electrically conducted with the ground cable and is grounded to the frame ground
Data Source
AI summary
A ground structure of a controller that is mounted in a construction machine such as a dump truck and has a case having an upper surface on which a connector receiver hole for a receptacle connector to be received is provided includes: a cable harness that is provided by a plurality of cables including a ground cable and is connected to the receptacle connector; and a connecting portion for the ground cable to be connected, the connecting portion being provided near the connector receiver hole on the upper surface.