Tractor Work Unit Lever Mode Shift Switch Integration
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Solution Overview
Problem
Conventional tractors equipped with work units like loaders face inefficiencies in operation due to separate tools for traveling and work units, hindering increased working efficiency.
Innovation Solution
A work vehicle configuration that integrates a mode shift switch on the work unit operation lever, allowing simultaneous operation of the work unit and traveling unit with a single tool, featuring a grip with the mode shift switch accessible for easy operation, and an engine blipping switch for maintaining constant vehicle speed during engine blipping control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate operation tools are used for traveling unit and work unit, then each unit can be operated independently, but working efficiency cannot be increased due to inability to operate both units simultaneously
Solution Approach 1:
The patent combines the mode shift switch (for traveling unit control) and the work unit operation lever (for work unit control) into a single integrated operation tool. This merging allows the operator to control both traveling and work units simultaneously using one tool, directly resolving the contradiction by enabling simultaneous operation while maintaining independent control capabilities for each unit.
Solution Approach 2:
The integrated operation tool serves multiple functions: it includes both the mode shift switch for traveling unit speed control and the work unit operation lever for work unit control. This multi-functionality allows a single tool to replace what were previously separate tools, enabling the operator to manage both traveling and work operations without switching between different controls, thus improving working efficiency.
2Productivity
If mode shift switch is integrated on work unit operation lever, then simultaneous operation of work unit and traveling unit is enabled, but device complexity increases
Solution Approach 1:
The patent merges the mode shift switch and work unit operation lever into a single integrated tool, which appears to increase complexity but actually simplifies the overall system by reducing the number of separate tools needed. The integration allows both functions to be accessed from one location, improving efficiency without requiring multiple separate control mechanisms.
3Speed
If engine blipping control is implemented, then vehicle speed can be maintained constant during engine revolution increase, but sudden speed changes may occur leading to accidents
Solution Approach 1:
The engine blipping control system monitors engine revolutions and vehicle speed, automatically adjusting controls to maintain constant vehicle speed while allowing engine revolutions to increase. This feedback mechanism prevents sudden speed changes by continuously regulating the system response, thereby maintaining both speed control and operational safety.
Data Source
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AI summary
A work vehicle (1) according to an aspect of the present invention is configured to shift a speed of a driving force from an engine (5) mounted on a traveling body (2) in a transmission unit (17) and to transfer the shifted driving force to a traveling unit (3, 4) and a work unit (70). The work vehicle (1) includes: a mode shift switch (303) that switches a maximum vehicle speed by the traveling unit (3, 4) or a maximum number of revolutions of the engine (5), the maximum vehicle speed and the maximum number of revolutions being set for each of a plurality of modes; and a work unit operation lever (51) configured to be used for operating the work unit (70), and the work unit operation lever (51) is provided with a mode shift switch (303).