Automotive Transmission Shift Lever Movement Blocker
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Solution Overview
Problem
In automotive transmissions supporting multiple gear shifting modes, there is a risk of erroneous operation leading to accidental selection of gear shifting positions, potentially causing vehicle accidents.
Innovation Solution
An automotive transmission design featuring a shift lever with a moving member and a movement blocker, including a rotating member and support member, that selectively blocks the shift lever's movement to prevent erroneous selection of gear shifting modes, ensuring stable conversion between modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shift lever is designed to allow free movement for easy gear selection, then the ease of operation is improved, but the risk of erroneous operation leading to accidental gear selection increases
Solution Approach 1:
A blocking member is introduced as an intermediary element between the shift lever and the gear selection mechanism. This blocking member can be positioned to prevent the shift lever from moving to certain gear positions, thereby mediating between the driver's input and the gear selection outcome to prevent erroneous operations while maintaining ease of intentional gear changes
Solution Approach 2:
The system applies preliminary anti-action by pre-positioning the blocking member to counteract potential erroneous shift lever movements before they can result in accidental gear selection. The blocking member is strategically positioned to interfere with unintended gear changes while allowing intended ones, preventing harmful outcomes before they occur
2Reliability
If a blocking mechanism is added to prevent erroneous gear selection, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The blocking member is designed to serve multiple functions: it acts as a physical barrier to prevent erroneous gear selection, serves as a visual indicator of blocked positions, and can be integrated with existing shift lever mechanisms. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved reliability
3Manufacturing precision
If the shift lever structure is modified to include guide grooves and moving members, then the precision of gear position selection is improved, but the manufacturing complexity increases
Solution Approach 1:
The shift lever structure is segmented into distinct functional components including guide grooves, moving members, and blocking member engagement points. This segmentation allows each component to be manufactured separately with standardized tolerances and then assembled, reducing overall manufacturing complexity while achieving precise gear position selection through the coordinated interaction of segmented 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
Prevents accidental selection of gear shifting positions, thereby reducing the risk of vehicle accidents and ensuring safe operation by selectively blocking the shift lever's movement during mode conversion.
Implementation Method 1
a rotating member configured to rotate in one direction by the moving member positioned at one side of the guide groove and block the movement of the moving member in the first direction
Implementation Method 2
a support member to which the rotating member is rotatably connected and which moves in the second direction by the moving member positioned at the other side of the guide groove
Data Source
AI summary
An automotive transmission is provided that includes a shift lever configured to move in a first direction to select a gear shifting position and a moving member that is configured to move in a second direction along a guide groove formed in the shift lever. A movement blocker is configured to selectively block the movement of the shift lever based on a position of the moving member. The movement blocker includes a rotating member configured to rotate in one direction by the moving member positioned at one side of the guide groove and block the movement of the moving member in the first direction. In addition, a support member to which the rotating member is rotatably connected moves in the second direction by the moving member positioned at the other side of the guide groove.