Operator Control Arrangement for Work Vehicle Steering and Articulation
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Solution Overview
Problem
Heavy equipment operators face challenges in efficiently and accurately controlling complex work vehicles like motor graders, which require intricate hand and arm gestures to manipulate numerous controls simultaneously, leading to imprecise operations and increased material usage, resulting in costly inefficiencies.
Innovation Solution
The operator control arrangement features ergonomic joystick controls with palm-on-top grips and balanced control sets distributed across both hands, allowing for simultaneous and sequential control inputs through single-digit movements, reducing fatigue and enhancing precision with incremental advance functionality for precise operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple separate controls are used for wheel lean and articulation, then each control can be precisely positioned, but the operator must perform multiple intricate gestures simultaneously increasing complexity and fatigue
Solution Approach 1:
The patent combines wheel lean control and articulation control into a single operator control device. The first control switch activates wheel lean while the second control switch activates articulation, both controlled from one operator control location. This merging reduces the number of separate controls the operator must manipulate, directly addressing the contradiction by simplifying operation without sacrificing control functionality.
Solution Approach 2:
The single operator control device performs multiple functions by housing both wheel lean control and articulation control switches. This multi-functional design allows one control device to replace what would traditionally require separate controls, reducing operator gesture complexity while maintaining precise control capabilities for both vehicle functions.
2Measurement precision
If intricate hand and arm gestures are required to manipulate controls, then precise control of vehicle systems can be achieved, but operator fatigue increases and working efficiency decreases
Solution Approach 1:
The patent positions control switches within easy reach of the operator's hand on a single control device. The first and second control switches are arranged so that a single digit can activate both wheel lean and articulation controls without requiring extensive hand or arm movements. This localized control arrangement maintains precision while reducing the physical effort and time required for control operations, thereby improving productivity.
3Adaptability or versatility
If multiple controls are manipulated in rapid succession, then complex vehicle operations can be performed, but control precision decreases leading to material waste
Solution Approach 1:
By merging wheel lean and articulation controls into a single operator control device with clearly positioned switches, the patent enables more accurate simultaneous control of multiple vehicle functions. The integrated design allows the operator to precisely coordinate wheel lean and articulation actions without the timing errors that occur when manipulating separate controls in rapid succession, thereby maintaining control accuracy while performing complex operations.
Data Source
AI summary
A control arrangement for a work vehicle has a first operator control configured to provide a steering input to turn steered wheels of the vehicle, and a second operator control having two control switches configured to provide a wheel lean input to lean the steered wheels and an articulation input to articulate the chassis of the vehicle. The control switches are positioned on the second operator control so that a single movement of a single digit of an operator's hand applied to the control switches simultaneously initiates the wheel lean input and the articulation input.