Seat Mounting Lock Lever for Stable Upward Swing Access
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Solution Overview
Problem
The existing seat mounting structures in work vehicles, such as those disclosed in U.S. Pat. No. 5,284,115, are prone to flipping over due to unexpected forces like wind, which can allow rain or foreign matter to enter the toolbox, as they rely on the operator's weight to maintain the seat position and lack a mechanism to restrict upward swing movement.
Innovation Solution
A seat mounting structure with a lock lever that engages a suspension unit to prevent the seat from flipping over when the operator is not seated, allowing upward swing movement only when the lever is unlocked, thereby preventing turnover and ensuring the seat remains secure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the seat is allowed to swing upward freely via springs, then the seat can be accessed easily and the toolbox is accessible, but the seat easily flips over when unexpected forces are applied
Solution Approach 1:
The lock lever is designed to be movable between two positions: engaged with the suspension unit to prevent flipping, and disengaged to allow upward swing. This dynamic switching mechanism allows the system to adapt between stability and accessibility modes based on operational needs
Solution Approach 2:
The lock lever acts as an intermediary element between the seat swing element and the suspension unit. It mediates the interaction by either blocking or permitting the suspension unit's upward movement, thereby controlling whether the seat can flip or remain stable
2Reliability
If the seat is restricted from upward swing movement to prevent flipping, then seat stability is improved, but the ability to access the toolbox is reduced
Solution Approach 1:
The lock lever transitions between static locked and unlocked states, dynamically changing the system's behavior from stable to accessible mode. This allows the seat to maintain stability during normal operation while enabling easy access when needed
Solution Approach 2:
The lock lever is positioned and configured in advance to engage with the suspension unit, preemptively preventing upward swing and potential flipping before it can occur. The locking action is prepared and available before any unexpected forces are applied
3Reliability
If a lock mechanism is added to prevent seat flipping, then seat stability is improved, but the device complexity increases
Solution Approach 1:
The lock lever is merged with the existing suspension unit components rather than being a separate, independent locking mechanism. The lock lever utilizes the suspension unit's own structure as part of the locking interface, thereby integrating the locking function into the existing suspension system
Solution Approach 2:
The suspension unit's component serves a dual purpose: it provides suspension function and simultaneously serves as part of the locking mechanism. The existing suspension component engages with the lock lever to prevent flipping, eliminating the need for additional dedicated locking parts
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
The solution effectively restricts the upward swing movement of the seat, preventing it from flipping over when not in use, thus protecting the toolbox from external elements while maintaining the ability to access it when needed.
Implementation Method 1
a suspension spring arranged between the seat base and the seat swing element
Implementation Method 2
a lock lever attached to the seat swing element to be movable between a seat locking position to prevent the seat swing element from flipping over and a seat unlocking position to allow the seat swinging element to swing upward
Data Source
AI summary
A seat mounting structure for mounting a seat to a work vehicle includes a seat base fixed to a vehicle body, a seat swing element fixed to the seat and attached to the seat base to be vertically swingable, a suspension unit arranged between the seat base and the seat swing element, and a lock lever attached to the seat swing element to be movable between a seat locking position to prevent the seat swing element from flipping over and a seat unlocking position to allow the seat swinging element to swing upward. The lock lever engages the suspension unit in the seat locking position and disengages from the suspension unit in the seat unlocking position.