Clutch Axial Positioning via Retaining Nut on Rotary Drive
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Solution Overview
Problem
Variations in gear shaft length due to tolerances and thermal expansion negatively affect the operation of clutch devices, causing stress on supporting and supported parts.
Innovation Solution
A clutch device is axially positioned independently of gear input shafts using a retaining nut screwed coaxially to a rotary drive, with rolling bearings or thrust washers providing axial support, allowing for low-friction movement and fluid channels for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If axial positioning is achieved by support on gear input shafts, then the clutch device can be positioned axially, but axial tolerances due to manufacturing variations and thermal expansion cause negative effects on clutch operation and produce considerable stresses
Solution Approach 1:
The invention separates the axial positioning function from the gear input shafts by introducing a dedicated retaining nut and support structure on the rotary drive. This segmentation allows the positioning function to be independent of the gear shaft tolerances, resolving the contradiction between reliability and manufacturing precision.
Solution Approach 2:
The retaining nut and support structure act as an intermediary element between the clutch device and the rotary drive. This intermediary provides a dedicated positioning interface that is not affected by gear shaft tolerances, thereby improving clutch operation stability while being independent of manufacturing precision of the gear shafts.
2Stability of the object's composition
If the clutch device is rigidly supported on gear input shafts, then axial positioning is achieved, but thermal expansion and tolerance variations produce considerable stresses on supporting and supported parts
Solution Approach 1:
The invention changes the positioning parameter reference from the gear input shafts to the rotary drive itself. By anchoring the axial position to the rotary drive through the retaining nut, the system becomes insensitive to thermal expansion and tolerance variations of the gear shafts, thereby reducing stresses while maintaining position stability.
3Reliability
If a retaining nut is introduced for independent axial positioning, then axial tolerances no longer negatively affect clutch operation, but the device complexity increases
Solution Approach 1:
The invention merges the axial positioning function with the existing rotary drive structure by using a retaining nut that threads onto the rotary drive. This integration approach adds minimal complexity compared to introducing a completely separate positioning mechanism, while achieving the goal of tolerance-independent positioning.
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
This solution eliminates the negative impact of axial tolerances on clutch operation, ensuring stable performance and allowing for easy assembly and disassembly, while also serving as a fluid feed and drainage system for the clutch.
Implementation Method 1
In order to insure low-friction relative movement of clutch components rotating against one another
Implementation Method 2
a retaining nut screwed coaxially to the rotary drive, on which the components of the clutch device are indirectly or directly supported
Data Source
AI summary
The invention relates to a device for axially positioning a clutch device, especially a dual-clutch device, on a rotary drive, wherein the clutch device is mounted so as to rotate about a rotational axis of said rotary drive. A retaining nut is coaxially screwed with the rotary drive, and the clutch device is indirectly or directly supported on said nut in an axial direction.