Fan Blade Support Assembly for Quiet Rotation and Easy Alignment
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Solution Overview
Problem
Air conditioners produce abnormal sounds due to friction and collision between the fan blade shaft and the support structure during rotation, and alignment of the fan blade shaft with the motor shaft is difficult, leading to low assembly efficiency and accuracy.
Innovation Solution
A fan blade support assembly with a movable fan blade shaft having a first section with a smaller diameter and a second section with a larger diameter, along with a transition section, which allows for a gap between the shaft and the support structure during rotation, reducing friction and collision, and an elastic sleeve for improved alignment and locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fan blade shaft is tightly fitted in the support structure without gap, then the support strength is improved, but friction and collision occur during rotation causing abnormal sound
Solution Approach 1:
The fan blade shaft is designed with different diameter sections: a first shaft section with smaller diameter that fits in the shaft hole with a gap to reduce friction and abnormal sound, and a second shaft section with larger diameter that provides support strength when abutting against the support structure. This local differentiation of dimensions resolves the contradiction between support strength and abnormal sound generation.
2Manufacturing precision
If the fan blade shaft is tightly fitted in the support structure, then positioning accuracy is improved, but alignment with motor shaft becomes difficult reducing assembly efficiency
Solution Approach 1:
The fan blade shaft is designed to be movable relative to the support base rather than fixed, allowing it to be easily positioned and aligned with the motor shaft during assembly. The movable design maintains positioning accuracy through the support structure while significantly improving assembly efficiency by eliminating complex alignment procedures.
3Device complexity
If the fan blade shaft rotates in close contact with the shaft hole, then structural compactness is improved, but wear occurs on the fan blade shaft reducing service life
Solution Approach 1:
The fan blade shaft features a first shaft section with smaller diameter that rotates in the shaft hole with a gap, preventing wear and extending service life. The second shaft section with larger diameter provides structural support and maintains compactness when abutting against the support structure. This local differentiation resolves the contradiction between structural compactness and service life.
Data Source
AI summary
Some embodiments of the present disclosure provide a fan blade support assembly for a fan blade, an air duct assembly, and an air conditioner. The fan blade support assembly includes: a support base, the support base includes a support base body, and the support base body is provided with a support base hole; a support structure, provided in the support base hole, and the support structure is provided with a shaft hole; and a fan blade shaft, an end of the fan blade shaft is connected to a drive portion after passing through the shaft hole, and the fan blade shaft is movably provided relative to the support base, wherein, the fan blade shaft includes a first shaft section and a second shaft section connected with the first shaft section, and a diameter of the first shaft section is less than a diameter of the second shaft section.