Transmission Shift Control Guide Parts Dog Clutch Release
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Solution Overview
Problem
Existing shift control systems for vehicles and machinery face challenges in preventing gear shift shocks and delays in acceleration while maintaining a lightweight and simplified structure, as they often require complex structures and increased parts.
Innovation Solution
A shift control system comprising a start clutch, transmission with meshing clutches, a clutch actuator, shift actuator, torque detector, and clutch controller that adjusts the transmission torque during gear shifts to prevent excessive shock, using guide parts to facilitate smooth transitions between gear engagements and releases, and simplifying the structure by reducing the number of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a twin-clutch transmission is used to prevent interruption of driving force, then gear shift shocks and delays in acceleration are prevented, but the structure becomes complicated and weight increases
Solution Approach 1:
The transmission is divided into two independent clutch mechanisms (first clutch and second clutch) that operate separately but coordinate during shifts. Each clutch has its own control system, allowing one clutch to engage while the other disengages, ensuring continuous power transmission without requiring a single complex multi-clutch system
Solution Approach 2:
The system pre-positions the second clutch in engagement before the first clutch fully disengages during a gear shift. The control device monitors shift timing and ensures the second clutch is ready to take over torque transmission, preventing any interruption in driving force to the drive wheels
2Reliability
If a seamless-shift transmission with multiple burettes is used to prevent gear shift shocks, then driving force continuity is maintained, but the number of parts increases and structure becomes complicated
Solution Approach 1:
The patent merges the functions of multiple burettes into a single clutch ring structure that can selectively engage with different gear sets. The clutch ring incorporates multiple engagement points and teeth that interact with various gears, eliminating the need for separate burettes for each gear while maintaining seamless shifting capability
Solution Approach 2:
The clutch ring is designed as a universal component that can engage with multiple different gear sets (first gear set, second gear set, etc.) through its multiple teeth and engagement surfaces. This single multi-functional component replaces what would otherwise require multiple specialized burettes, reducing part count while maintaining gear shift smoothness
Data Source
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AI summary
The present invention is capable of suppressing gear shift shocks or delays in acceleration with no interruption of driving force and reducing the weight. Disclosed is a transmission which is provided with multiple stage shift gears 19, 21 so arranged to shift a number of dog clutches 47, 49 to shift a gear to the upper stage of the multiple stage shift gears 19, 21, and is characterized in that a guide part G is provided to a shift operation section 93 and the dog clutches 47, 49 on each of the sages so as to move the lower dog clutch 47 in a neutral direction by a coasting torque acting on the lower stage by a shift rotation of the upper stage to release a meshing engagement when meshing engagements of the lower and upper dog clutches 47, 49 are simultaneously performed by an operation of the shift operation section 93.