Excavator Turn Frame Controller Mounting for Easier Valve Harness Routing
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Solution Overview
Problem
In electrically controlled construction machines, the placement of controllers relative to control valves complicates the wiring of wire harnesses, leading to increased difficulty in connecting electrical signals due to spatial constraints and the need for multiple wire harnesses.
Innovation Solution
The construction machine is designed with the control valve placed in front of the hydraulic oil tank and the controller positioned in front of the control valve, allowing for simplified wiring of the wire harness between the controller and the control valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the controller is placed in a protected position away from heat and vibration, then the controller is protected from environmental damage, but the wiring complexity of the wire harness increases
Solution Approach 1:
The patent applies dimensional repositioning by placing the controller on the rear face of a transverse plate that reinforces a support bracket in the turn frame, effectively moving the controller to a different spatial dimension that provides both protection and improved wiring access. This dimensional change allows the wire harness to be routed more efficiently between the controller and hydraulic instruments.
Solution Approach 2:
The transverse plate serving as a structural reinforcement element acts as an intermediary carrier for the controller. This intermediary structure provides a stable mounting position that is both protected from environmental factors and positioned to facilitate wire harness routing to multiple hydraulic instruments.
2Reliability
If the controller is placed far from the control valve, then the controller is positioned in a protected area, but the difficulty of wiring the wire harness increases
Solution Approach 1:
The controller is repositioned to the rear face of a transverse plate in the turn frame structure, utilizing a different spatial dimension that simultaneously achieves protection and reduces wiring distance to the control valve and other hydraulic instruments.
3Adaptability or versatility
If multiple wire harnesses are wired from one controller, then the controller can communicate with multiple instruments, but the wiring complexity increases
Solution Approach 1:
The transverse plate with reinforcement structure serves multiple functions: it provides structural support, acts as a mounting platform for the controller, and serves as a routing pathway for multiple wire harnesses connecting to different hydraulic instruments, thereby reducing overall system complexity.
Data Source
AI summary
On a turn frame of an excavation machine, a hydraulic oil tank is placed in the center of a right engine chamber in the front-back direction, a control valve is placed in front of the hydraulic oil tank, a battery is further placed in front of the control valve, and a cool mechanism is placed behind the hydraulic oil tank. The control valve is supported by a support member, and a controller that outputs a signal for driving the control valve is mounted to a side plate part of the support member, thereby to be placed in a position in front of the control valve and above the battery.