Torque Limiting Coupling Prevents Unintentional Activation
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Solution Overview
Problem
Torque limiting couplings in drive trains face issues with unintentional activation due to rotational vibrations and automatic reactivation after torque thresholds are exceeded or fallen below, leading to potential damage and noise.
Innovation Solution
Incorporating a retaining pin guided by a spring and multiple locking elements that can be transferred between locking and unlocking positions, preventing automatic switching on or off, ensuring intentional actuation and maintaining torque transmission only when the predetermined torque is exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the switching disc is allowed to rotate freely between coupling and decoupling positions, then automatic reactivation occurs when torque falls below threshold, but noise and reduced lifespan result
Solution Approach 1:
The locking element performs preliminary anti-action by preemptively blocking the switching disc from rotating back into the coupling position. When the switching disc moves to the decoupling position, the locking element engages with a locking recess, preventing any automatic reactivation. This eliminates the harmful repeated switching cycles that cause noise and reduce component lifespan.
2Reliability
If locking elements are added to prevent automatic switching, then device complexity increases, but intentional actuation is ensured
Solution Approach 1:
The locking element is spring-loaded and automatically engages with the locking recess when the switching disc moves to the decoupling position, without requiring external control. The system self-locks and self-unlocks based on the position of the switching disc, ensuring intentional actuation while minimizing the complexity of the control mechanism.
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
Prevents unintentional activation and reactivation of the torque limiting coupling, ensuring reliable operation and extended lifespan by ensuring intentional actuation and maintaining torque transmission only when the predetermined torque is exceeded, effectively addressing rotational vibrations in drive trains.
Implementation Method 1
A first spring element acts axially onto the switching disc (4)
Implementation Method 2
A second spring element acts on the switching disc (4) in circumferential direction towards the coupling position
Data Source
AI summary
A torque limiting coupling is arranged rotatably around a longitudinal axis. The torque coupling comprisesat least one locking element that is displaceable between a locking position and an unlocking position and that is biased towards the locking position. The locking element is transferable into the locking position in the decoupling position of a switching disc, in which locking position the locking element is supported in a circumferential direction on a coupling hub and on the switching disc, and in which the switching disc is locked against rotation relative to the coupling hub. The at least one locking element is further transferable into the locking position when the switching disc is in its coupling position wherein, in the locking position, the locking element is supported in a circumferential direction on the coupling hub and the switching disc, and the switching disc is locked against rotation relative to the coupling hub.