Planetary Gear Coupling for Compact Transmission Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing transmission systems with pairs of wheels, comprising a fixed and a loose wheel, face challenges in efficiently coupling, shifting, and synchronizing while requiring significant axial space, which limits their compactness and efficiency.
Innovation Solution
The implementation of a planetary gear system that includes two synchronized planetary gear elements associated with idler gears, allowing for relative rotation to trigger coupling or synchronization processes, reducing axial space requirements by nesting planetary gear elements within the idler gears, and enabling actuation via a sliding sleeve for positive locking connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional coupling devices are used in transmissions with pairs of wheels, then coupling and synchronization functions are achieved, but axial space requirements increase
Solution Approach 1:
The planetary gear elements are nested radially between the two adjacent idle gears, placing one gear system inside the space between existing gears. This nesting approach allows the coupling device to occupy minimal axial space while maintaining all necessary coupling and synchronization functions.
Solution Approach 2:
The planetary gear is arranged radially outside the area between the idle gears with its axis tilted 90° to the shaft axis, transitioning from axial arrangement to radial arrangement. This dimensional change enables the coupling device to function without increasing axial space requirements.
2Volume of moving object
If planetary gear elements are placed radially within teeth of idle gears or nested between them, then axial space is reduced, but manufacturing complexity increases
Solution Approach 1:
The coupling device is divided into separate components: the planetary gear elements, the sliding sleeve, and the actuation mechanism. This segmentation allows each component to be manufactured independently using standard gear manufacturing processes, then assembled together, reducing overall manufacturing complexity despite the innovative spatial arrangement.
3Measurement precision
If planetary gear elements rotate synchronously with idle gears, then coupling accuracy improves, but relative rotation capability is limited
Solution Approach 1:
The system transitions from a static synchronous arrangement to a dynamic one where the planetary gear elements can rotate synchronously with the idle gears during normal operation, but are capable of relative rotation when actuated by the sliding sleeve. This dynamic capability allows the system to maintain synchronization accuracy while adapting to different operational states.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a device for coupling, shifting and/or synchronizing in a transmission having gear pairs which, in order to produce gears in the transmission, in each case comprise a fixed gear and a movable gear which is arranged rotatably on a transmission shaft, and having a coupling device. The invention is distinguished by the fact that the coupling device comprises a planetary gear mechanism which is assigned two movable gears of the transmission which are adjacent on a transmission shaft.