Excavator Dozer Blade Hitch Coupling Without Rear Access
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Solution Overview
Problem
Existing systems for attaching a trailer to a dozer blade on an excavator are cumbersome, time-consuming, and pose safety risks due to the need to access the rear of the dozer blade for connection, especially when hydraulic and electrical connections are involved.
Innovation Solution
A coupling system with a keyhole component on the front surface of the dozer blade and a key component on the trailer hitch device, allowing for a positive connection without accessing the rear, along with hydraulic and electrical connectors positioned on the front for easy access, and a locking mechanism to secure the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a trailer hitch is mounted with a system passing through the dozer blade with a locking mechanism on the rear, then the connection is secure, but the operation becomes awkward and requires rear access which poses safety constraints
Solution Approach 1:
The patent inverts the traditional locking mechanism location from the rear of the dozer blade to the front surface. The key component with locking features is now accessible from the front, allowing the operator to perform coupling operations without needing to access the rear of the machine, thereby resolving the contradiction between secure connection and ease of operation.
Solution Approach 2:
The patent transitions the coupling interface from a rear-access configuration to a front-access configuration, effectively changing the spatial dimension of operation. The keyhole and key components are positioned on the front surface of the dozer blade, moving the interaction point to a more accessible location for the operator.
2Adaptability or versatility
If the connection box is disposed behind the dozer plate, then hydraulic and electrical connections are provided, but accessing the connection box is cumbersome and creates safety constraints
Solution Approach 1:
The patent merges the location of the connection box with the coupling interface by positioning both on the front surface of the dozer blade. The connection box is integrated into the front assembly, allowing simultaneous access to both mechanical coupling (keyhole/key) and hydraulic-electrical connections (connectors) from the same accessible location.
Solution Approach 2:
The patent inverts the location of the connection box from the rear of the dozer plate to the front surface. This relocation places the hydraulic and electrical connectors in proximity to the mechanical coupling interface, enabling the operator to access all connection points from the front without needing to move to the rear of the machine.
3Object-generated harmful factors
If a dozer blade is assembled, then the machine has pushing capability, but attaching a trailer becomes more difficult requiring dismantling
Solution Approach 1:
The patent segments the coupling function from the dozer blade structure by using a separate, removable key component that interfaces with a keyhole in the blade. This modular approach allows the coupling mechanism to be independently accessed and operated without requiring disassembly of the dozer blade itself, maintaining pushing capability while enabling quick trailer attachment.
Solution Approach 2:
The patent incorporates the keyhole and connection box into the dozer blade assembly in advance, with all necessary coupling interfaces pre-positioned on the front surface. This preliminary configuration ensures that when trailer attachment is needed, the operator can immediately engage the key component and connect hoses/electrics without any dismantling or preparatory disassembly work.
Data Source
AI summary
An excavator coupling system for coupling a trailer hitch device to a dozer blade of an excavator. The excavator coupling system includes a keyhole component disposed on a front surface of the dozer blade of the excavator and a key component coupled with the trailer hitch device. The keyhole and key components are designed to forming a positive connection to couple the trailer hitch device to the dozer blade. The keyhole component is on the front of the dozer blade and provide for coupling the trailer hitch device to the dozer blade without accessing a rear portion of the dozer blade.