Ceiling Fan Blade Holder Assembly for Fixed Pitch and Low Vibration
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Solution Overview
Problem
Existing ceiling fans face challenges in efficiently managing airflow and temperature regulation, particularly in industrial and commercial environments, with issues related to vibration, gyroscopic movement, and the need for precise blade pitch adjustment.
Innovation Solution
A ceiling fan design featuring a non-rotating downrod assembly, guy wires for additional support, and a push-lock assembly for blade holders that sets a predetermined blade pitch, maximizing airflow efficiency and reducing vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade pitch is manually adjusted during operation, then the airflow efficiency can be optimized for different conditions, but the device complexity and operational difficulty increase
Solution Approach 1:
The blade holders are pre-configured with specific pitch angles during manufacturing. The push-lock assembly pre-sets the blade pitch to optimal values, eliminating the need for manual adjustment during operation. This preliminary configuration maintains airflow efficiency while simplifying operation.
Solution Approach 2:
The push-lock assembly automatically maintains the predetermined blade pitch without requiring user intervention. The system self-regulates the blade angle through its mechanical design, providing consistent optimal performance without manual adjustment.
2Ease of operation
If a rotating downrod assembly is used, then the fan can be easily installed and adjusted, but vibration and gyroscopic movement increase
Solution Approach 1:
Instead of making the downrod assembly rotatable to facilitate adjustment, the patent makes it fixed and non-rotating. This inversion eliminates vibration and gyroscopic movement while maintaining ease of installation through the fixed structural connection between the motor housing and mounting bracket.
Solution Approach 2:
The rotational adjustment function is extracted from the downrod assembly and relocated to the blade holders themselves. The blade holders can be independently adjusted to different pitch angles without rotating the entire downrod assembly, thereby eliminating vibration while preserving adjustability.
3Ease of manufacture
If the blade holders are loosely secured to the motor housing, then installation and maintenance become easier, but the structural stability and airflow consistency deteriorate
Solution Approach 1:
The push-lock assembly provides a dynamic securing mechanism that allows for easy installation and removal while maintaining stable operation during use. The spring-loaded lock engages automatically during assembly but can be easily disengaged for maintenance, combining ease of manufacture with operational stability.
Solution Approach 2:
The spring element in the push-lock assembly provides beforehand cushioning that ensures consistent engagement force. This pre-loaded spring mechanism compensates for manufacturing tolerances and wear, maintaining stable blade positioning without requiring overly tight fastening.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
An ceiling fan (10) comprising a motor system (16). The motor system (16) is mounted around a motor shaft (90). The motor shaft (90) couples to a downrod (14) for suspending the ceiling fan (10) from a structure. The motor shaft (90) and motor (16) are encased by a motor housing (198). The motor housing (198) comprises hub arms (202) for mounting a plurality of blade holders (18). The blade holders (18) coupled to a plurality of blades (20) rotatable about the motor (16) during operation. The downrod (14) comprises a wire disk (58) mounting guy wiring (22) to the downrod (14). A retention rod (304) is utilized internal of the motor (16) and downrod (14) as a secondary retention method. An electrical connector (568) is internal of the motor shaft (90) and electrically couples to the stator to power the motor (16).