Ceiling Fan Oscillating Mechanism Clutch Design
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Solution Overview
Problem
Conventional electric fan oscillating mechanisms cannot adjust oscillation angles, leading to potential risks of gear tooth collapse or connecting rod fracture when external forces are applied, and do not prevent damage to internal mechanisms or motors from inappropriate rotation.
Innovation Solution
A fan oscillating mechanism incorporating a clutch member with wave washers and flat washers to provide adjustable rotational resistance, allowing users to change the oscillation angle safely, and featuring an oval-shaped slot and transverse cut-out to reduce interference and extend service life, along with a motor transmission mechanism and spindle link to manage rotational forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external force is applied to adjust oscillation angle in conventional mechanism, then oscillation angle can be changed, but gear tooth collapse or connecting rod fracture occurs
Solution Approach 1:
A clutch member is introduced as an intermediary between the motor transmission mechanism and the fan suspension tube. This clutch member includes a wave washer that provides controlled rotational resistance, allowing the system to safely accommodate external adjustment forces without transmitting damaging loads to the motor and internal mechanisms.
Solution Approach 2:
The clutch member creates a dynamic decoupling between the motor and the fan suspension tube. During normal operation, the clutch maintains controlled resistance for stable oscillation. When external force is applied for angle adjustment, the clutch allows relative rotation between the spindle link and fan suspension tube, enabling safe angle changes without mechanical damage.
2Duration of action of stationary object
If motor is designed to operate continuously without reverse rotation, then motor service life is prolonged, but oscillation angle cannot be adjusted
Solution Approach 1:
The clutch member serves as a mediator that decouples the motor from the fan suspension tube during angle adjustment. This allows the motor to maintain its continuous forward rotation design for extended service life, while the clutch member permits the fan suspension tube to rotate freely relative to the spindle link when external adjustment force is applied.
Solution Approach 2:
The oscillation mechanism is segmented into independent rotatable components: the motor drives the crank plate and connecting rod, which connect to the spindle link, which in turn connects to the fan suspension tube. The clutch member enables relative rotation between the spindle link and fan suspension tube, allowing angle adjustment without requiring the motor to reverse or stop.
3Device complexity
If conventional oscillating mechanism structure is used, then mechanism is simple, but oscillation angle cannot be adjusted and damage risks increase
Solution Approach 1:
A clutch member is introduced as an intermediary component between the spindle link and fan suspension tube. This single additional component enables oscillation angle adjustment by allowing controlled relative rotation, while maintaining overall structural simplicity and avoiding complex adjustment mechanisms.
Solution Approach 2:
The clutch member introduces dynamic adjustability to the otherwise fixed oscillation angle mechanism. The wave washer within the clutch provides rotational resistance during normal operation but allows free rotation when external adjustment force is applied, enabling versatile angle adjustment without complicating the overall structure.
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
Enables adjustable oscillation angles without damaging the motor or internal mechanisms, prolongs the service life of components, and prevents undesired damage from external forces by allowing free rotation of the fan suspension tube when necessary, while maintaining smooth operation and reducing assembly errors.
Implementation Method 1
The clutch member includes a wave washer disposed between the spindle link and the fan suspension tube, and the clutch member is used to provide rotational resistance
Implementation Method 2
the clutch member can be formed by clutch lining, dampers or an electromagnetic clutch device
Implementation Method 3
the clutch member can be formed by clutch lining, dampers or an electromagnetic clutch device
Data Source
AI summary
A ceiling fan with an oscillating mechanism includes a clutch member for adjusting the angle of oscillation according to a user's need. When the motor is actuated, the rotating torque induced by the motor and the transmission mechanism is less than the rotational resistance of the clutch member such that the motor may drive the fan to oscillate. Further, when the user applies an external rotational force greater than the rotational resistance of the clutch member, the user can swing the fan to any angle as desired without rotating or shifting other members except the fan and the fan suspension tube. In this manner, undesired damage of the mechanism or motor due to inappropriately applied external force can be avoided efficiently.