Locking Device Hoop with Guided Convex Blocks
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Solution Overview
Problem
Conventional locking devices for external rotor axial flow fans have limited installation spaces due to bolts being mounted close to fan blades, making assembly and disassembly inconvenient and inefficient.
Innovation Solution
A locking device with a hoop that curls up to form an axial mounting hole, featuring misaligned convex blocks and ears with guiding inclined planes, connected via a bolt-nut mechanism or screws, allowing for axial and circumferential movement to securely hold objects, and a balancing structure to address dynamic unbalance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bolts are mounted close to fan blades to connect installation sections, then the connecting structure is achieved, but the installation space becomes limited and assembly/disassembly becomes inconvenient
Solution Approach 1:
The locking device is divided into multiple functional segments: a hoop structure with multiple installation sections, convex blocks for positioning, convex ears for locking, and guiding inclined planes for movement control. This segmentation allows each component to perform its specific function independently, enabling robust connection while maintaining operational convenience through modular assembly and disassembly
Solution Approach 2:
The locking device incorporates dynamic elements including guiding inclined planes that enable controlled movement of convex blocks, and a bolt-nut mechanism that allows dynamic tightening and loosening. These dynamic features facilitate easy assembly and disassembly operations while ensuring secure connection during operation, resolving the contradiction between connection strength and operational convenience
2Strength
If conventional bolts and nuts are used to circumferentially tighten the rotor, then the connecting function is achieved, but the assembly and disassembly process becomes inefficient due to limited installation space
Solution Approach 1:
The hoop structure serves multiple functions simultaneously: it provides the mounting framework, contains the locking mechanism, and facilitates both connection and disconnection operations. The convex ears with through holes and mounting holes serve as universal locking interfaces that can be engaged and disengaged efficiently, improving assembly productivity while maintaining the tightening function
Solution Approach 2:
The guiding inclined planes act as intermediaries between the convex blocks and the tightening force. They mediate the conversion of axial movement into circumferential tightening action, enabling efficient assembly and disassembly operations while achieving the required tightening function, thus resolving the productivity contradiction
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 provides a simple, cost-effective, robust connecting structure that facilitates convenient and efficient assembly and disassembly, while the balancing structure ensures reliable quality by eliminating dynamic unbalance, ensuring efficient and consistent product quality.
Implementation Method 1
the upper convex block and the lower convex block are respectively arranged with an upper guiding inclined plane and a lower guiding inclined plane; the upper convex block and the lower convex block move axially to narrow the middle aperture, the upper guiding inclined plane and the lower guiding inclined plane contact with each other to make the upper convex block and the lower convex block to move circumferentially
Implementation Method 2
the through hole of the upper convex ear and the mounting hole of the lower convex ear are axially connected using a bolt-nut mechanism or screws to lock the upper convex ear and the lower convex ear
Data Source
AI summary
A locking device including a hoop, the hoop curling up to form an axial mounting hole in the middle. An upper convex block, a lower convex block, a middle aperture, a left aperture, a right aperture, an upper convex ear, a lower convex ear, an upper guiding inclined plane, and a lower guiding inclined plane are disposed in the device. The upper convex block and the lower convex block move axially to narrow the middle aperture, the upper guiding inclined plane and the lower guiding inclined plane contact with each other to make the upper convex block and the lower convex block to move circumferentially to narrow both the left aperture and the right aperture and enable the hoop to tightly hold objects inside the axial mounting hole.