Neutral Locking Tool for Vehicle Transmission Service
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Solution Overview
Problem
Automatic transmissions require a specific method to be placed into a neutral state for service operations, which is not efficiently addressed by existing technologies.
Innovation Solution
A neutral locking system comprising a park release shaft and a neutral locking tool with a main shaft that nonrotatably couples to the park release shaft, allowing rotation to place the transmission in a neutral state and a locking pin to secure the position, facilitating rotation and preventing unintended movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a neutral locking tool is designed to rotate the park release shaft to place transmission in neutral state, then the transmission can be efficiently placed in neutral state for service operations, but the tool requires secure locking mechanism to prevent unintended rotation and ensure safety
Solution Approach 1:
The locking pin acts as an intermediary element between the handle portion and the external environment. It mediates the rotational motion by providing a mechanical barrier that prevents unintended rotation while allowing controlled rotation when needed for service operations.
Solution Approach 2:
The locking pin is positioned to provide preliminary opposition to rotational motion before unintended rotation can occur. By being in place during storage and transport, it preemptively prevents any rotational movement, ensuring safety before service operations begin.
2Reliability
If the locking pin is positioned to prevent rotation during storage and transport, then the tool remains secure and prevents unintended transmission movement, but the tool cannot be rotated when service operations are needed
Solution Approach 1:
The locking pin transitions from a static locking position during storage to a dynamic state where it can be removed or disengaged when service operations are needed. This dynamic characteristic allows the system to adapt between security mode and operational mode.
Solution Approach 2:
The locking pin is pre-positioned in the locked state during manufacturing and storage. Before service operations can begin, the user must first perform the action of removing or disengaging the locking pin, ensuring that the tool is properly prepared and preventing accidental activation.
3Productivity
If the main shaft is designed to nonrotatably couple to the park release shaft, then rotation of the main shaft effectively rotates the park release shaft to place transmission in neutral state, but the coupling mechanism adds complexity to the tool design
Solution Approach 1:
The coupling mechanism extracts only the essential functional elements needed for nonrotatable connection between the main shaft and park release shaft. By removing unnecessary components and focusing on the core coupling function, the design achieves effective power transmission without excessive complexity.
Solution Approach 2:
The coupling mechanism is segmented into distinct functional components that can be independently analyzed and assembled. This segmentation allows for simpler individual parts that collectively achieve the nonrotatable coupling function, reducing overall design complexity while maintaining effectiveness.
Data Source
AI summary
A neutral locking system for a vehicle includes a park release shaft and a neutral locking tool. The park release shaft is operatively connected to the transmission such that rotation of the park release shaft places the transmission in a neutral state. The tool is configured to couple to the park release shaft such that rotation of the tool rotates the park release shaft. The tool can also include a sliding locking pin having a first position allowing rotation of the tool within an engine compartment and a second position in which the pin contacts a component in the engine compartment to limit rotation of the tool.