External Function Switch Control for Dirt-Resistant Farm Vehicles
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Solution Overview
Problem
Existing agricultural vehicles with exterior function switches face reliability issues due to exposure to dirt and moisture, making them costly and prone to failure.
Innovation Solution
Replace the conventional rotary selector switch with function switches that can change assignments to working elements directly, using push-button controls and colored LEDs for indication, allowing operation from outside the vehicle without the need for a selector switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional rotary selector switch is mounted on the exterior of the vehicle to control working elements, then the operator can change function assignments from outside the vehicle, but the selector switch is exposed to dirt and moisture which reduces reliability and increases cost
Solution Approach 1:
The patent removes the selector switch component entirely from the exterior control system. Instead of having a separate selector switch that needs protection from environmental factors, the function switches themselves perform both the selection and control functions, eliminating the vulnerable component that required protective measures.
Solution Approach 2:
The function switches are designed to serve multiple purposes: they act as both the selection mechanism (previously requiring a separate selector switch) and the control mechanism for operating working elements. This multi-functionality eliminates the need for additional exterior components that would be exposed to harsh conditions.
2Adaptability or versatility
If a rotary selector switch is used to assign functions to switches, then multiple working elements can be controlled, but the system becomes more complex and costly due to protection requirements
Solution Approach 1:
The selector switch component is extracted and removed from the system. The patent achieves function assignment capability through the function switches themselves, which can be selectively activated to assign different working elements, thereby reducing the total component count and system complexity.
Solution Approach 2:
The selection function and control function are merged into a single component - the function switch. Instead of having separate selector and control elements, each function switch integrates both capabilities, allowing one component to perform what previously required two separate components.
3Ease of operation
If exterior function switches are used to control working elements, then operation from outside the vehicle is enabled, but the switches are prone to failure due to environmental exposure
Solution Approach 1:
The vulnerable selector switch is removed from the exterior control system. The patent achieves reliable external control by using function switches that do not require additional protective mechanisms, as the selection and control functions are integrated into components designed for exterior use.
Solution Approach 2:
The function switches are designed to perform their own selection and control functions without requiring additional protective components or mechanisms. Each function switch is self-sufficient in its operation, eliminating the need for separate protected selector mechanisms.
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
Provides a cost-effective and reliable means to control vehicle operations from outside, enhancing durability and usability of exterior function switches.
Implementation Method 1
The display element can, in particular, be a light source associated with at least the first function switch. A light color of the light source or a temporal pattern of the light source's operation can be characteristic of the operating element currently associated with the function switch.
Data Source
Figure 1
Figure 2A~2C
AI summary
At least one first and one second control element (8, 9) are arranged externally on an agricultural vehicle to enable a person outside the vehicle to control a first active function selected from a first set of functions assigned to the first control element (8) by operating the first control element (8), or to control a second active function of the vehicle selected from a second set of functions assigned to the second control element (9) by operating the second control element (9). At least the first active function can be selected from the first set of functions by simultaneously operating the first and second control elements (8, 9).