UAV Propeller Locking Assembly for Vibration-Resistant Blade Retention
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Solution Overview
Problem
Conventional propeller systems face issues with loose connections between the base and driving shaft, leading to blade ejection during abrupt speed changes or large vibrations, requiring special tools for disassembly.
Innovation Solution
A propulsion system with a driving device featuring a locking member with snap-fitting members and an elastic abutting member, which snap-fits with the propeller and provides a locking function to prevent loose connections and blade ejection, allowing for easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tight fitting threads are used to fixedly connect the base and driving shaft, then the connection strength is improved, but the connection becomes loose under abrupt speed changes or large vibrations
Solution Approach 1:
The patent employs a dynamic locking mechanism where the locking member can rotate relative to the base to engage or disengage from the driving shaft. This dynamic capability allows the connection to adapt to operational conditions, maintaining reliability during abrupt speed changes and vibrations while enabling easy disassembly when needed.
Solution Approach 2:
The connection system is divided into separate functional components: a locking member with locking grooves, a driving shaft with corresponding engagement features, and a base. This segmentation allows each component to perform its specific function independently, with the locking member providing secure attachment during operation and facilitating controlled disassembly.
2Reliability
If tight fitting threads are used to fixedly connect the base and driving shaft, then the connection is secure during normal operation, but special tools are required for disassembly
Solution Approach 1:
The locking member is designed to rotate relative to the base, transitioning between locked and unlocked positions. During normal operation, it maintains a secure connection. For disassembly, the locking member can be rotated to disengage from the driving shaft, enabling tool-free removal without requiring special disassembly tools.
Solution Approach 2:
The locking mechanism is designed to be self-operating through simple rotation of the locking member. The structure allows the user to manually engage or disengage the connection by rotating the locking member, eliminating the need for external tools or complex disassembly procedures.
3Stability of the object's composition
If the base and driving shaft are fixedly connected, then the connection maintains integrity under normal conditions, but the connection becomes loose under large vibrations
Solution Approach 1:
The locking mechanism incorporates a dynamic rotating connection between the locking member and base, allowing the system to absorb and adapt to vibrational forces. The rotational capability enables the connection to maintain stability under large vibrations while preventing loosening, as the locking member can adjust its position rather than being rigidly fixed.
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 system effectively prevents blade ejection and simplifies disassembly by providing a secure locking mechanism that maintains connection integrity during operation and facilitates easy assembly and disassembly.
Implementation Method 1
The locking member is provided with at least one snap-fitting member configured to snap-fit with the propeller
Data Source
AI summary
An unmanned aerial vehicle (UAV) includes a propeller, a driving device, and an elastic abutting member sleeve. The propeller includes a blade base, a blade mounted on the blade base, and a first installation foolproof member disposed on the blade base. The driving device includes a main body, a driving shaft rotatable relative to the main body, a locking member disposed on the main body, and a second installation foolproof member disposed on the locking member. The driving device is coupled with the propeller. The elastic abutting member is coupled with the driving shaft and disposed between the main body and the blade base and abuts against the main body and the blade base.