Shifter Assembly Pivot Mechanism for Transmission Mode Transition
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Solution Overview
Problem
Conventional automatic transmission systems are inefficient, slow to shift, and complex, with shifter assemblies being costly and difficult to manufacture, while modern systems aim to balance cost, manufacturability, functionality, and ergonomics.
Innovation Solution
A shifter assembly with a housing, shift lever, first and second pivot mechanisms, and a gimbal ring, allowing movement along multiple shift paths and enabling seamless transitions between automatic and manual shifting modes, reducing manufacturing complexity and enhancing usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional automatic transmission systems are used, then driver input is reduced, but shifting speed and efficiency deteriorate
Solution Approach 1:
The shifter assembly incorporates a detent mechanism with springs that dynamically engage and disengage based on shift lever position and force applied. This allows the system to transition between locked (automatic mode) and movable (manual mode) states, enabling fast shifts while maintaining automatic operation stability
2Adaptability or versatility
If multiple actuators are added for manual-shift mode, then functionality improves, but device complexity and manufacturing cost increase
Solution Approach 1:
The shifter assembly's shift lever serves multiple functions: it can be pushed forward for automatic mode operation and pulled backward for manual-shift mode engagement. This single component handles both operating modes, eliminating the need for separate actuators and reducing overall system complexity
Solution Approach 2:
The detent mechanism combines the automatic mode locking function with the manual-shift engagement function into a single mechanical system. The same detent balls and springs that maintain automatic mode also enable manual mode when the shift lever is pulled backward, merging two functions into one mechanism
3Ease of manufacture
If conventional shifter assemblies are used, then manufacturing is simpler, but functionality and ergonomics deteriorate
Solution Approach 1:
The shifter assembly is divided into distinct functional modules: the shift lever, the detent mechanism with separate detent balls and springs for each gate, and the electronic actuator. This segmentation allows each component to be manufactured independently using conventional processes while enabling complex multi-mode functionality when assembled
Data Source
AI summary
A shifter assembly including a shift lever pivotally mounted to a housing, a shift lever, a first pivot mechanism, a gimbal ring, and a second pivot mechanism. The lever is movable in a first gate along a first plurality of paths, a second gate along a second plurality of paths, and a bridge gate between the first and second gates. The first pivot mechanism is mounted to the lever to permit movement about a first pivot axis within one of the gates. The gimbal has an aperture and is disposed about and coupled to the lever. The second pivot mechanism is mounted to the gimbal to permit movement about a second pivot axis within another one of the gates. The axes are spaced from each other. The gimbal has receivers recessed from the inner surface with the first pivot mechanism engaging the receivers to couple the lever to the gimbal.