Loader Grip Switch Layout for Fast Shuttle Changeover
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Solution Overview
Problem
Conventional operation devices for working vehicles, such as tractors, require operators to switch between forward and backward travel using different devices, leading to increased time and effort, and a risk of incorrect switch operation when using a front loader.
Innovation Solution
An operation device with a lever shaft and grip portion featuring integrated shuttle changeover and restraint switches, allowing easy switching between forward and backward travel, with the shuttle changeover switch operable by the thumb and the restraint switch by a finger, reducing the need to reposition the grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different operation devices are used for shuttle changeover and front loader operation, then the functions are separated and controlled independently, but the operator must switch grips frequently and may operate wrong switches
Solution Approach 1:
The patent combines the shuttle changeover switch and front loader operation switches into a single grip portion. The shuttle changeover switch is positioned on the grip surface, while front loader switches are placed on the side surface of the same grip, allowing the operator to control both vehicle travel and loader operations without changing grips.
Solution Approach 2:
The grip portion serves multiple functions: it provides a holding surface for the operator's hand, accommodates the shuttle changeover switch on its surface, and integrates front loader operation switches on its side. This multi-functional design eliminates the need for separate operation devices.
2Adaptability or versatility
If multiple operation switches are provided on the grip portion, then both shuttle changeover and front loader operations are accessible, but the risk of incorrect switch activation increases
Solution Approach 1:
The patent positions the shuttle changeover switch on the main surface of the grip portion where the operator's thumb naturally rests, while front loader switches are placed on the side surface accessible to other fingers. This spatial differentiation allows intuitive operation and reduces the risk of activating the wrong switch.
Solution Approach 2:
The grip portion acts as an intermediary structure that separates and organizes different control functions in distinct spatial zones. The surface-mounted shuttle switch and side-mounted loader switches are physically differentiated, serving as visual and tactile mediators that guide correct switch activation.
3Speed
If the shuttle changeover switch is easily accessible, then travel direction switching is quick, but front loader operation switches may be accidentally activated
Solution Approach 1:
The shuttle changeover switch is positioned on the thumb-operable surface of the grip for quick access, while front loader switches are placed on the side surface requiring deliberate finger movement. This local differentiation ensures fast travel switching while preventing accidental loader activation.
Data Source
AI summary
An operation device provided in an operator's seat area of a working vehicle, to operate a front loader attached to a vehicle body of the working vehicle includes a lever shaft extending to the operator's seat area; a grip portion provided at a distal end portion of the lever shaft; and a plurality of operation switches provided at the grip portion, to cause the working vehicle to execute various actions. The operation switches include a shuttle changeover switch to switch between forward travel and backward travel of the working vehicle, and a shuttle restraint switch to restrain the switching with the shuttle changeover switch and cancel the restraint.