Tapered-Ring Clutch Wear Locking for Fail-Safe Torque Transmission
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Solution Overview
Problem
Existing clutch devices with friction linings for motor vehicle ancillary components lack a fail-safe system to detect wear, which can lead to clutch failure and loss of torque transmission, especially in safety-relevant components like air compressors.
Innovation Solution
A clutch device with a tapered ring and spring element, featuring a wear gap and locking mechanism that prevents disengagement when wear exceeds a certain threshold, ensuring the clutch remains engaged and maintains torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction linings are used for torque transmission in switchable clutches, then power transmission is achieved, but the friction linings wear out after a certain number of switch cycles, leading to clutch failure
Solution Approach 1:
The wear indicator mechanism is activated in advance to monitor friction lining wear before complete failure occurs. The indicator gradually moves as wear increases, providing early warning and allowing preventive maintenance before the clutch fails completely.
Solution Approach 2:
The wear indicator provides continuous feedback on the condition of the friction linings by translating wear into a visible positional change. This feedback mechanism allows the system to monitor its own degradation state and trigger maintenance actions before reliability is compromised.
2Reliability
If a fail-safe system is implemented to ensure emergency operation, then safety is improved, but the system cannot detect wear on the linings, leading to undetected clutch failure
Solution Approach 1:
The wear detection function is merged with the existing fail-safe system by integrating the wear indicator mechanism into the clutch assembly. The indicator uses the same mechanical components (friction linings, tapered ring, spring element) already present in the fail-safe system, adding wear monitoring without compromising emergency operation guarantees.
Solution Approach 2:
The wear indicator acts as an intermediary element that translates the physical wear of friction linings into a measurable positional change. This intermediary mechanism bridges the gap between the hidden wear process and the visible indication system, enabling detection while maintaining the original fail-safe functionality.
3Adaptability or versatility
If the clutch is designed to open when activated, then switching function is achieved, but wear of friction linings reduces torque transmission capability, eventually causing complete failure
Solution Approach 1:
The wear indicator provides advance notice of declining torque transmission capability by showing wear progression before it reaches critical levels. This allows maintenance to be performed preliminarily, preventing complete loss of torque transmission capability while preserving the switching 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 solution ensures continuous operation of ancillary components by maintaining contact between friction linings, even as wear increases, preventing slippage and ensuring the clutch remains engaged, thus guaranteeing the function of safety-critical components like air compressors.
Implementation Method 1
a spring element, by way of which the tapered ring can be moved along the shaft into an engaged position in which the friction linings are in contact with one another
Implementation Method 2
Power transmission in switchable clutches occurs normally via friction linings
Implementation Method 3
a locking element which can be moved into the wear gap when the latter exceeds a definable maximum width. Once the locking element has moved into the wear gap, movement of the tapered ring is prevented
Data Source
AI summary
A clutch device with friction linings includes: a clutch housing, the friction linings including a first friction lining and a second friction lining, the first friction lining being arranged on the clutch housing, the clutch housing including a stop surface; a tapered ring, the second friction lining being arranged on the tapered ring, the plurality of friction linings being arranged relative to one another so that the plurality of friction linings can be brought into full contact with one another in a contact plane, the tapered ring including a reference surface; a spring element; a clutch actuating device, a wear gap being formed between the stop surface and the reference surface, the wear gap configured for becoming wider as the friction linings wear; and a locking element configured for being moved into the wear gap when the wear gap exceeds a definable maximum width.