Work Vehicle Lever Locking Mechanism for Clear Operator Access
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Solution Overview
Problem
Conventional operating mechanisms for work vehicles can obstruct the motion of operators due to the positioning of operating portions, such as loader levers, which can hinder getting in and out and other movements.
Innovation Solution
An operating mechanism for a work vehicle that includes a support portion, transmitting portion, switching portion, and lock lever, allowing the operating portion to be rocked and restricted, enabling it to move in conjunction with the operator's actions while providing a non-used state to avoid obstruction, by sliding a restricting member to change the rocking capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operating portion (loader lever) is positioned to be easily accessible for operation, then the ease of operation is improved, but the operator's motion (getting in and out) is obstructed
Solution Approach 1:
The operating portion is designed to be movable between a first position (extending upward) for operation and a second position (rocked backward) for clearing the passage. The switching portion enables dynamic repositioning of the operating portion based on whether it is needed for operation or needs to clear the operator's path during entry/exit.
Solution Approach 2:
The position parameter of the operating portion is changed between two states: extending upward (first position) for ease of operation, and rocked backward (second position) to suppress obstruction of operator motion. The switching mechanism allows parameter change on demand.
2Reliability
If the operating portion is fixed in an upward position for stable operation, then the reliability of operation is improved, but the operator's ability to move freely is reduced
Solution Approach 1:
The operating portion transitions from a fixed upward position to a movable configuration that can rock backward. The switching portion with restricting member enables the system to adapt between fixed (for reliable operation) and movable (for operator passage) states.
Solution Approach 2:
The operating portion serves dual functions: extending upward for reliable operation control, and rocking backward to clear the passage for operator movement. The switching mechanism enables this multi-functionality by allowing position change based on operational context.
3Ease of operation
If the operating portion can rock freely for easy access, then the ease of operation is improved, but unintended activation of the device may occur
Solution Approach 1:
The switching portion acts as an intermediary between the operating portion and the transmitting portion. It includes a restricting member that mediates the rocking motion, allowing controlled movement while preventing unintended activation through the interlock mechanism.
Solution Approach 2:
The restricting function is extracted from the operating portion itself and placed in a separate switching portion. This allows the operating portion to rock freely for ease of access while the switching portion independently controls and restricts the motion to prevent unintended activation.
4Reliability
If a locking mechanism is added to prevent unintended activation, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism (switching portion) is merged with the operating mechanism structure. The restricting member is integrated into the existing support body and operating portion assembly, combining the locking function with the operating mechanism rather than adding a separate independent locking system.
Solution Approach 2:
The switching portion utilizes the natural rocking motion of the operating portion to trigger the locking and unlocking actions. The restricting member automatically engages and disengages based on the position of the operating portion, making the system self-regulating without requiring additional control inputs.
Data Source
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AI summary
An operating mechanism of a work vehicle includes: an operating portion that is provided to a side console disposed beside a seat and can be operated by an operator; and a switching portion capable of switching between a used state in which the operating portion can be used and a non-used state in which the operating portion cannot be used.