Shift Range Switching Apparatus Assembly Regulating Device
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Solution Overview
Problem
The electric shift range switching apparatus for automatic transmissions faces issues with accidental vehicle movement due to deviations between the recognized and actual shift ranges, particularly when the electric actuator is detached or reattached for maintenance, leading to potential engine starting without the driver's intention.
Innovation Solution
A shift range switching apparatus with an electric actuator that includes a control rod and an assembly regulating device, allowing the electric actuator to be detachable and attachable only when the actual shift range is set at a specific position, ensuring alignment and preventing accidental vehicle movement by maintaining the correct shift range during detachment and reattachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the electric actuator is made detachable for maintenance, then ease of repair is improved, but reliability deteriorates due to potential deviation between recognized and actual shift ranges
Solution Approach 1:
The assembly regulating device pre-positions the electric actuator and shift range switching device at a predetermined angular position corresponding to a specific shift range before maintenance work begins. This preliminary positioning ensures that when the electric actuator is reattached after maintenance, the alignment between the output shaft and control rod is automatically restored, preventing deviation between recognized and actual shift ranges without requiring complex calibration procedures.
2Ease of operation
If the electric actuator is detached and reattached, then ease of operation for maintenance is improved, but manufacturing precision deteriorates due to misalignment between output shaft and control rod
Solution Approach 1:
The assembly regulating device acts as an intermediary mechanism between the electric actuator and the shift range switching device. It includes regulating members that engage with both the output shaft of the electric actuator and the control rod of the shift range switching device, ensuring their angular positions are synchronized at a predetermined position. This intermediary device simplifies the maintenance operation by automatically ensuring precise alignment upon reattachment, eliminating the need for complex manual alignment procedures.
Data Source
AI summary
A shift range switching apparatus includes an automatic transmission that includes a shift range switching device having a control rod for switching an actual shift range corresponding to rotation angle of the control rod. The shift range switching apparatus further includes an electric actuator that includes an output shaft connecting with the control rod. The electric actuator switches the actual shift range by rotating the control rod via the output shaft. The shift range switching apparatus further includes an assembly regulating device that allows the electric actuator to be detachable from and attachable to the automatic transmission when the actual shift range of the shift range switching device is set at a specific shift range.