Multi-Disc Clutch Module Layout for Low Drag Torque
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Solution Overview
Problem
Existing clutch modules experience high drag torque in the disengaged configuration due to friction between clutch elements and poor axial contact caused by bracing springs, leading to cone formation and undulation of friction elements.
Innovation Solution
A clutch module design with a spacer spring positioned axially between clutch discs and friction discs, and a force transmission member that applies pressure radially on either side of the bracing spring, preventing cone formation and ensuring proper contact between friction elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If spacer springs are positioned axially between friction elements to reduce drag torque, then drag torque is reduced, but poor axial contact and cone formation occur between friction elements
Solution Approach 1:
The force transmission member acts as an intermediary element that applies radial pressure on both sides of the spacer spring, mediating between the spacer spring's axial load and the friction elements to prevent cone formation while maintaining the drag torque reduction benefit
Solution Approach 2:
The solution transitions from purely axial force application by the spacer spring to include radial force application by the force transmission member, adding a radial dimension to the force system to counteract the cone formation caused by axial spacing
2Productivity
If spacer springs apply axial load to separate friction elements, then drag torque decreases, but radial offset causes friction elements to cone and undulate
Solution Approach 1:
The force transmission member applies radial pressure that counteracts the cone formation and undulation caused by the axial load of the spacer spring, essentially providing a counterbalancing force in the radial direction to maintain element flatness
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 design significantly reduces drag torque and maintains effective torque transmission by ensuring consistent and proper contact between clutch and friction elements, enhancing the operational efficiency of the clutch module.
Implementation Method 1
at least one spacer spring positioned axially between two clutch discs, in particular two adjacent clutch discs, or between two friction discs, in particular two adjacent friction discs
Implementation Method 2
a force transmission member configured to exert pressure on the multi-disc assembly at a first support zone, and at least one second support zone
Implementation Method 3
The first friction elements of the clutch are brought into contact with its second friction elements, the transmission shaft is rotationally coupled to the drive shaft under the effect of the force generated by the actuation system
Data Source
Figure 1~3
Figure 2a~2b
Figure 4~5
AI summary
Clutch module (100) capable of rotating about an axis of rotation (O) and comprising: - at least one multi-disc assembly (30) of a clutch (E), the multi-disc assembly comprising a plurality of clutch discs (35) and a plurality of friction discs (36) that are arranged so as to engage with one another, - at least one spacing spring (60) positioned axially between two clutch discs (35) or between two friction discs (36), - a torque-input disc carrier (20), and - a force transmission member (40) configured to exert a pressure on the multi-disc assembly at a first bearing zone (a1) and at at least one second bearing zone (a2), the at least one spacing spring being positioned radially between the first bearing zone (a1) and the at least one second bearing zone (a2).