Arc-Protrusion Transmission Coupling for Overload Torque Slip
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Solution Overview
Problem
Existing driving devices stall and are damaged when handling excessively large loads, as they lack effective mechanisms to manage excessive torque.
Innovation Solution
A transmission device comprising an external cylindrical transmission device with inwardly extending arc-shaped protrusions, an internal transmission device with outwardly extending arc-shaped protrusions, and a spacer ring that allows the external transmission device to slip relative to the internal device when the torque exceeds a predetermined level, preventing damage during overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the driving device is designed to handle large loads, then the power transmission capability is improved, but the device will stall and be damaged when the load is excessively large
Solution Approach 1:
The transmission device employs dynamic elements including arc-shaped protrusions that can deform elastically and a spacer ring that can move axially. These dynamic components allow the system to adapt its transmission characteristics in real-time: under normal loads the protrusions maintain rigid engagement for full power transmission, while under excessive loads the protrusions deform and the spacer ring moves to enable slipping, thereby protecting the driving device from damage while maintaining power transmission capability during normal operation.
2Reliability
If the transmission device allows slipping under excessive torque, then the driving device is protected from damage, but power transmission is interrupted
Solution Approach 1:
The transmission device incorporates elastic deformation capability in the arc-shaped protrusions and axial movement capacity in the spacer ring as pre-designed protective mechanisms. When excessive torque is detected through the deformation of protrusions and movement of the spacer ring, the system automatically transitions to a slipping state that protects the driving device. This beforehand cushioning allows the system to absorb overload energy through controlled slipping rather than catastrophic failure, balancing device protection with maintained operational capability.
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 transmission device effectively prevents the driving device from stalling during overloads by allowing the external transmission device to slip relative to the internal device, thereby protecting it from excessive torque and reducing wear, ensuring stable operation and prolonging the service life.
Implementation Method 1
when the rotation driving torque between the external transmission device and the internal transmission device is greater than a predetermined torque, the deformation of the arc-shaped protrusions of the external transmission device or the arc-shaped protrusions of the internal transmission device enables the external transmission device to slip and rotate relative to the internal transmission device
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A transmission device includes an external transmission device, an internal transmission device, and a spacer ring. The external transmission device is cylindrical and has an outer wall and an inner wall. The inner wall has a plurality of inwardly extending arc-shaped protrusions. The internal transmission device is disposed in the inner wall and has an outer circumferential surface including a plurality of outwardly extending arc-shaped protrusions. The spacer ring is located between and contacts the arc-shaped protrusions of the external transmission device and the arc-shaped protrusions of the internal transmission device. When torque between the external transmission device and the internal transmission device is greater than a predetermined torque, one or more of the arc-shaped protrusions of the external transmission device or the arc-shaped protrusions of the internal transmission device deform and the external transmission device rotationally slips relative to the internal transmission device.