Column Transmission Eccentric Gear Layout for Quiet Park Return
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicular transmissions, particularly column-type transmissions, face challenges in minimizing unnecessary noise and abrasion when the shift lever is returned to the park stage, and in efficiently utilizing limited installation space for gear shift operations.
Innovation Solution
A vehicular transmission design incorporating a movable unit with an eccentric gear system, a rotation unit, an insertion unit, and a locking mechanism that allows different transmission paths for driver operation and automatic return, reducing the overall size and minimizing noise or abrasion during automatic shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shift lever is automatically returned to the P stage when the vehicle is turned off, then the driver does not need to manually change the shift stage, but unnecessary noise or abrasion is generated on transmission components
Solution Approach 1:
The transmission system is divided into two separate transmission paths: one for driver operation (feeling of operation path) and one for automatic return (no feeling of operation path). The feeling of operation determination unit segments the control logic to identify whether the operation originates from the driver or the automatic return mechanism, allowing differential handling of each path to prevent unnecessary noise and abrasion during automatic return while maintaining driver feedback during manual operation.
Solution Approach 2:
The feeling of operation determination unit acts as an intermediary between the movable unit and the transmission components. It monitors the operation source and controls the engagement of transmission components accordingly, preventing direct engagement during automatic return operations thereby eliminating noise and abrasion while still enabling the automatic return function.
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
The design prevents unnecessary noise or abrasion during automatic shifting and allows for miniaturization, enhancing space utilization in compact installations like column-type transmissions.
Implementation Method 1
an eccentric gear unit centered on a second axis eccentric from the first axis, the eccentric gear including a first external gear eccentrically engaged with the first internal gear
Data Source
AI summary
A vehicular transmission includes a movable unit coupled to a lever and rotated to select one of a plurality of shift stages and including a first internal gear centered on a first axis, an eccentric gear unit centered on a second axis eccentric from the first axis and including a first external gear and a second external gear eccentrically engaged with the first internal gear, a rotation unit centered on the first axis and including a second internal gear eccentrically engaged with the second external gear, an insertion unit including an eccentric shaft inserted into a center of the eccentric gear unit and a central shaft inserted into a first aperture formed at a center of the rotation unit, and a locking unit configured to fix the rotation unit based on a source of a driving force for rotating the movable unit.