Air Sweeping Blade Structure for Stronger Shaft Connection
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Solution Overview
Problem
Existing air sweeping blades in air conditioners suffer from weak connecting strength between the connecting rod shaft and the blade, leading to breakage during assembly and insufficient rigidity, resulting in reduced reliability and distortion.
Innovation Solution
The connecting rod shaft is extended to the edge of the blade body and fixedly connected, serving as a reinforcement rib to enhance rigidity and strength, while the flexible area's design with a specific opening configuration reduces stress concentration and improves assembly reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connecting rod shaft and blade body are connected via an assembly groove, then the blade can be rotationally connected, but the connecting strength is insufficient and breakage occurs during assembly
Solution Approach 1:
The connecting rod shaft and blade body are merged into a single integral structure, eliminating the assembly groove interface that caused weak connections. This integration ensures that the connecting rod shaft and blade body form a unified component with continuous material flow, preventing breakage during assembly while maintaining rotational functionality.
Solution Approach 2:
The blade body is segmented into a rigid portion and a flexible portion, with the connecting rod shaft positioned in the rigid portion. This segmentation allows the rigid portion to provide strong structural support for the connecting rod shaft, while the flexible portion maintains the necessary flexibility for air sweeping motion, thus resolving the contradiction between connection strength and operational flexibility.
2Adaptability or versatility
If the blade is made thin for flexibility, then air sweeping motion is enabled, but the connecting strength between connecting rod shaft and blade is reduced
Solution Approach 1:
The blade body is divided into a rigid portion containing the connecting rod shaft and a flexible portion for air sweeping. This segmentation allows the rigid portion to provide sufficient structural strength for the connecting rod shaft attachment, while the flexible portion maintains the necessary flexibility for air sweeping motion, thus resolving the contradiction between connection strength and operational flexibility.
Solution Approach 2:
Different portions of the blade body have different structural qualities: the rigid portion has high structural integrity and strength to support the connecting rod shaft, while the flexible portion has reduced thickness and increased flexibility for air sweeping. This local differentiation of structural properties resolves the contradiction between needing strength at the connection point and flexibility at the sweeping surface.
3Device complexity
If the connecting rod shaft does not extend to the edge of the blade body, then the blade structure remains simple, but the rigidity of the blade body is insufficient causing distortion
Solution Approach 1:
The connecting rod shaft is extended to the edge of the blade body and merged with the rigid portion, forming an integral reinforcement structure. This extension of the connecting rod shaft to the blade edge provides additional structural support and increases the moment of inertia, thereby enhancing the overall rigidity of the blade body without requiring separate reinforcement elements.
Data Source
AI summary
Provided are an air sweeping blade, an air sweeping mechanism and an air conditioner. The air sweeping blade includes a blade body (11). A connecting rod shaft (13) rotationally connected with a connecting rod (20) is provided on the blade body (11), and the connecting rod shaft (13) extends to an edge of the blade body (11) along an axis of the connecting rod shaft and is fixedly connected with the blade body (11). By means of the structure, on one hand, the reliability of connection between the connecting rod shaft (13) and the blade body (11) is improved, and the condition of breakage caused by pulling during assembly is avoided; and on the other hand, the rigidity of the blade body (11) is improved, and the blade body (11) is prevented from distorting.