S-Shaped Cam Shift Rail Actuator for Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automated manual transmissions and dual clutch transmissions require multiple actuators for shifting and selecting operations, leading to increased costs and power consumption, necessitating a reduction in the number of actuators while maintaining efficiency.
Innovation Solution
An apparatus using an S-shaped cam and rollers to enable a single actuator to move shift rails, allowing for both shifting and selecting operations, with the cam selectively interacting with rollers to move shift rails in an axial direction, reducing the need for multiple actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple actuators are used for shifting and selecting operations, then gear shifting efficiency is maintained, but the number of actuators increases leading to higher cost and power consumption
Solution Approach 1:
The patent combines shifting and selecting operations into a single actuator system. The control shaft integrates both selecting (axial movement) and shifting (rotational movement) functions, eliminating the need for separate actuators for each operation. This merging reduces the total number of actuators while maintaining the efficiency of automated gear shifting.
Solution Approach 2:
The single actuator is designed to perform multiple functions: it can move the control shaft axially for selecting operations and rotate it for shifting operations. This multi-functional design allows one actuator to replace what traditionally required multiple actuators, reducing system complexity and cost while preserving gear shifting efficiency.
2Productivity
If multiple actuators are used for shifting and selecting operations, then gear shifting capability is maintained, but vehicle price increases
Solution Approach 1:
By merging selecting and shifting operations into a single actuator system with a unified control shaft, the patent reduces the total component count. This consolidation lowers manufacturing costs and vehicle price while maintaining full gear shifting capability through the integrated actuator's ability to perform both axial and rotational movements.
3Productivity
If multiple actuators are used for shifting and selecting operations, then gear shifting function is maintained, but power consumption increases
Solution Approach 1:
The patent merges selecting and shifting operations into a single actuator, reducing the total power consumption by eliminating redundant actuators. The unified control shaft system requires less energy overall while maintaining complete gear shifting function, as one actuator can perform both axial movement for selecting and rotational movement for shifting.
Data Source
AI summary
An apparatus for moving a shift rail of a transmission may include a control shaft provided to be moved in a direction perpendicular to a plurality of shift rails by an actuator, a plurality of rollers protruding from one selected among a corresponding one of the shift rails and the control shaft, the rollers being formed on one of facing sides of the shift rail and the control shaft, and a cam protruding in an S-shaped form from a remaining one selected among the corresponding shift rail and the control shaft, on which no roller is formed, the cam being provided to selectively move the shift rails in an axial direction by moving while coming into contact at opposite sides thereof with the rollers depending on a distance by which the control shaft is moved.