FAN BLADE ASSEMLBY
A fan blade assembly comprises: a motor-mounting seat and a plurality of spaced-apart fan blades extending from a periphery of the motor-mounting seat. The fan blades each are provided with a vibration-blocking unit in the form of a concave structure, which makes the fan blades become a non-flat structure. The vibration-blocking unit reduces the vibration and noise of the fan blade assembly, it further increases the structural strength while relatively reducing the thickness of the fan blades, so that the material cost of the fan blades is reduced.
1. Field of the Invention
The present invention relates to a fan, and more particularly to a fan blade assembly.
2. Description of the Prior Art
Fan is an indispensible commodity to people's daily life. Wind noise is also an important consideration (besides the air moving capacity) when choosing a fan. A conventional fan blade structure 10, as shown in
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
SUMMARY OF THE INVENTIONThe primary object of the present invention is to provide a fan blade assembly capable of reducing vibration and noise, and also reducing manufacturing cost.
To achieve the above object, a fan blade assembly in accordance with the present invention comprises: a motor-mounting seat and a plurality of spaced-apart fan blades extending from a periphery of the motor-mounting seat. The fan blades each include a connecting edge, an opposite outer edge, and a leading edge and a trailing edge between the connecting edge and the opposite outer edge. The connecting edge is connected to the periphery of the motor-mounting seat, a vibration-blocking unit is formed in each of the fan blades and extends from the trailing edge to the leading edge, making the fan blades become a non-flat structure. The vibration-blocking unit has a length smaller than half of a length of the trailing edge.
The vibration-blocking unit is a concave structure and can reduce the vibration and noise of the fan blade assembly, it further increases the structural strength while relatively reducing the thickness of the fan blades, so that the material cost of the fan blades is reduced.
The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
Referring to
The fan blade assembly 20 is mounted on a fan support X1 in such a manner that the motor-mounting seat 21 is connected to the fan motor X2, as shown in
For example, a conventional 14-inch fan blade assembly approximately weighs 168 grams and produces noise of 38-40 dB at the fan motor speed of 1050 RPM (revolutions per minute). However, a 14-inch fan blade assembly in accordance with the present invention can be made as light as 132 grams and produces noise of only 19-20 dB at the same speed of 1050 RPM.
While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Claims
1. A fan blade assembly comprising: a motor-mounting seat and a plurality of spaced-apart fan blades extending from a periphery of the motor-mounting seat, the fan blades each including a connecting edge, an opposite outer edge, and a leading edge and a trailing edge between the connecting edge and the opposite outer edge, the connecting edge being connected to the periphery of the motor-mounting seat, a vibration-blocking unit being formed in each of the fan blades and extending from the trailing edge to the leading edge, making the fan blades become a non-flat structure, the vibration-blocking unit having a length smaller than half of a length of the trailing edge.
2. The fan blade assembly as claimed in claim 1, wherein the motor-mounting seat is formed with a through hole for insertion of a shaft of a fan motor.
3. The fan blade assembly as claimed in claim 1, wherein the opposite outer edge is arc-shaped.
4. The fan blade assembly as claimed in claim 1, wherein the vibration-blocking unit is an arc-shaped concave.
5. The fan blade assembly as claimed in claim 1, wherein a periphery of the vibration-blocking unit is arc-shaped.
6. The fan blade assembly as claimed in claim 1, wherein the fan blade assembly is mounted on a fan support, and the motor-mounting seat is connected to the fan motor.
Type: Application
Filed: Oct 30, 2010
Publication Date: May 3, 2012
Inventor: Wan-Ju CHANG (Chiayi County)
Application Number: 12/916,537
International Classification: F04D 29/38 (20060101);