Two-Part Shift Sleeve for Complex Transmission Coupling
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Solution Overview
Problem
Existing shifting devices for motor vehicle transmissions are bulky and limited in their ability to implement complex coupling constellations, particularly with relative rotational elements such as the rotor of an electric machine and the transmission housing.
Innovation Solution
A two-part displacement sleeve configuration where each part is axially connected but rotationally uncoupled, allowing for independent rotation and joint axial displacement, enabling coupling with external relative rotational elements like the housing and rotor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single displacement sleeve with two axial toothed sections is used, then the device structure is simplified, but the ability to implement complex coupling constellations with external relative rotational elements is limited
Solution Approach 1:
The displacement sleeve is divided into two separate sleeve parts (first sleeve part and second sleeve part), each capable of independent rotation. This segmentation allows each sleeve part to independently engage with different toothed elements, enabling complex coupling constellations while maintaining a relatively simple overall structure.
2Ease of operation
If the displacement sleeve and actuation sleeve are rotationally uncoupled, then axial forces can be transmitted to the displacement sleeve, but the device becomes bulkier
Solution Approach 1:
The sleeve system is segmented into two distinct parts (displacement sleeve and actuation sleeve) with clearly separated functions. The actuation sleeve handles axial displacement and force transmission, while the displacement sleeve handles rotational movement and coupling. This functional segmentation enables compact integration despite the rotational uncoupling requirement.
Data Source
AI summary
The invention relates to a shifting device for the selection of rotationally fixed non-rotational couplings of a plurality of coaxial shafts of a motor-vehicle transmission, comprising a displacement sleeve, which can be axially displaced in relation to a housing and which has internal teeth having two axial toothed sections spaced apart from each other by an axial gap, and which coaxially surrounds a plurality of toothed elements that are arranged axially adjacent to each other and that are each non-rotationally connected to one of the shafts and that each have external teeth corresponding to the internal teeth of the displacement sleeve, wherein the displacement sleeve has a first sleeve part and a second sleeve part that are connected to each other in a manner that is axially fixed and rotationally decoupled, wherein the first sleeve part is a carrier of the first axial toothed section and the second sleeve part is a carrier of the second axial toothed section.