Operation Lever Switch Mapping for Auxiliary Work Machine Control
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Solution Overview
Problem
Construction machines with conventional operation levers face difficulties in accommodating additional auxiliary devices without re-holding the operation lever or altering the operator's sight line, limiting the ability to efficiently operate new functions.
Innovation Solution
An assembly and method for a work machine that includes an operation lever with a first and second switch, where the second switch is deactivated at factory shipment, and a processing circuitry that allows for the assignment of ports to control and power auxiliary devices added post-manufacturing, enabling the operator to control additional devices without additional structural attachments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional auxiliary devices are added to construction machines, then the functionality and versatility of the machine is improved, but the operation complexity and difficulty of controlling the additional devices increases
Solution Approach 1:
The operation lever is designed with multiple switches (first switch and second switch) that can control different functions. The first switch controls the work machine's primary functions, while the second switch is configured to control auxiliary devices. This multi-functionality allows a single operation lever to control both the main machine and additional auxiliary devices, maintaining ease of operation while expanding versatility.
Solution Approach 2:
The control for auxiliary devices is merged with the existing operation lever structure. The second switch is integrated into the operation lever alongside the first switch, allowing both switches to be operated simultaneously by the operator's hand. This merging eliminates the need for separate control mechanisms for auxiliary devices, reducing operation complexity while adding functionality.
2Adaptability or versatility
If additional switches are mounted on the operation lever, then the control capability for auxiliary devices is improved, but the structural complexity and difficulty of installation increases
Solution Approach 1:
The operation lever is pre-configured with a second switch during manufacturing, but this switch is deactivated at the point of factory shipment. The switch and its electrical connection are prepared in advance, allowing customers to activate and use the auxiliary device control function without requiring structural modifications or complex installation procedures. This preliminary preparation reduces both structural complexity and installation difficulty.
Solution Approach 2:
A processing circuitry acts as an intermediary between the switches and the control system. The processing circuitry receives signals from both the first switch and second switch, and intelligently routes them to control either the work machine or auxiliary devices. This intermediary simplifies the overall control architecture by providing a centralized intelligence layer rather than requiring separate complex wiring and control mechanisms for each function.
3Adaptability or versatility
If the second switch is activated after factory shipment, then the ease of customization and adaptability is improved, but the reliability and safety of the control system may be compromised
Solution Approach 1:
The processing circuitry implements feedback mechanisms to monitor and manage the activation state of the first and second switches. When the second switch is activated after factory shipment, the processing circuitry receives configuration information from an input device and adjusts its control logic accordingly. This feedback ensures that the control system maintains reliability by properly managing the transition from deactivated to activated state and ensuring correct signal routing.
Solution Approach 2:
The processing circuitry serves as an intermediary that manages the activation and configuration of the second switch. It receives configuration information from an input device and mediates between the second switch and the control system, ensuring that auxiliary devices are properly integrated without compromising the reliability of the existing control system. The processing circuitry maintains system reliability by providing a controlled interface for post-shipment customization.
Data Source
AI summary
An assembly for a work machine comprises an operation lever comprising a first switch and a second switch, the first switch being activated and set for controlling the work machine and the second switch being deactivated at a point of factory shipment, a first port electrically coupled to the second switch of the operation lever, a second port coupled to a power source of the work machine, and a processing circuitry. The processing circuitry is configured to receive a request for setting an auxiliary device to the work machine from an input device, the auxiliary device being detachably attached to the work machine after the point of factory shipment; assign the first port to the second switch of the operation lever, to control the auxiliary device; assign the second port to the auxiliary device, to supply power to the auxiliary device; and set configuration information of the auxiliary device based on input information from the input device.