Patent Application
20190063444
The present invention is related to fans, and in particular to an axleless fan device.
The conventional fan mainly includes a plurality of blades along a rotary shaft. The plurality of blades extend from the rotary shaft. When a driving device at a rear side of the rotary shaft drives the rotary shaft to rotate, the blades are driven to rotate and thus air are driven to flow along a predetermined direction.
However, in the prior art fan structure, the blades are arranged around the rotary shaft. When the blades rotate, the wind becomes smaller and smaller along radial inward directions. Therefore the wind disperses outwards and thus, the wind cannot be concentrated. As a result, the wind strength is insufficient.
Accordingly, the object of the present invention is to provide an axleless fan device, wherein wind blows from one side to another side along an axial direction with a large strength. Therefore defects in the prior art of low wind strength and without concentrating along the axial direction are resolved.
To achieve above object, the present invention provides an axleless fan device, comprising: an axleless blade set including an annular frame and a plurality of blades; the plurality of blades being connected to an inner wall of the annular frame; each blade extending inwards from the inner wall of the annular frame toward a center of the annular frame; an outer wall of the annular frame being formed with a plurality of driving sheets which are arranged along radial directions of the annular frame; and a driving structure for driving the driving sheets to rotate so as to drive the annular frame to rotate; as a result, the blades within the annular frame rotating therewith so as to generate an air beam to flow from one side of the annular frame to another side of the annular frame.
In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
An axleless blade set 10 includes an annular frame 11 and a plurality of blades 12. The plurality of blades 12 are connected to an inner wall of the annular frame 11. Each blade 12 extends inwards from the inner wall of the annular frame 11 toward a center of the annular frame 11. An outer wall of the annular frame 11 is formed with a plurality of driving sheets 15 which are arranged along radial directions of the annular frame 11.
When wind blows toward the axleless blade set 10 along a direction vertical to an axial direction of the annular frame 11, the plurality of driving sheets 15 are driven to rotate so as to drive the annular frame 11 to rotate therewith. Then, the plurality of blades 12 within the annular frame 11 will rotate therewith. As a result, the wind blows from one side of the annular frame 11 to another side thereof so as to form with a wind beam.
A driving structure 20 serves to drive the driving sheets 15 to rotate so as to drive the annular frame 11 to rotate. As a result, the blades 12 within the annular frame 11 rotate therewith so as to generate an air beam to flow from one side of the annular frame 11 to another side of the annular frame 11. In this embodiment, the plurality of blades 12 are extended from the inner wall of the annular frame 11 toward the center of the annular frame 11. Therefore the wind will concentrates and flow along an axial direction of the annular frame 11.
A guide casing 30 has a tubal structure and includes a lower inlet 31, an upper inlet 32 and an upper outlet 33. The axleless blade set 10 is rotatably installed within the guide casing 30 near the upper outlet 33.
The driving sheet 15 includes a motor and fan set 40 which is installed within the guide casing 30 and near the lower inlet 31. The motor and fan set 40 includes a motor 41, a spindle 411 extending outwards from the motor 441 and a plurality of fans 42 engaging to the spindle 411. However, installing of the motor and blades is well known in the art and thus the structure shown in the drawing is not used to confine the scope of the present invention. Other structure which causes fans are driven by a motor is usable in the present invention. By the motor and fan set 40, air flows into the guide casing 30 from the lower inlet 41 and then flows out from the upper outlet 32 of the guide casing 30.
The air will driven the annular frame 11 to rotate so that the driving sheets 15 at outer side of the annular frame 11 will rotate. As a result, wind flowing into the upper inlet 32 will blow out from the upper outlet 33.
Above mentioned serial connection of axleless blade sets 10 may be used to drive a jet engine. The wind flowing out of the axleless blade sets 20 are very strong so as to drive air around the jet engine to cause that the air also flows into the engine to generate a great explosion. However, since the wind is concentrated in the axial direction. Therefore, the requirement of metal strength in forging is lower than the prior art. Thus the overall efficiency is promoted and the cost is down.
An axleless blade set 10 includes an annular frame 11 and a plurality of blades extending form an inner wall of the annular frame 11 to a center of the annular frame 11. An outer wall of the annular frame 11 extends with a plurality of driving sheets 15.
A driving structure 20 serves for driving the plurality of driving sheets 15 so as to drive the annular frame 11 to rotate and thus the plurality of blades within the annular frame 11 rotates therewith. Therefore wind beam flows from one side of the annular frame 11 to another side. Since the blades 12 extended from the inner wall of the annular frame 11 toward the center thereof, the wind beam will concentrate along a central axial direction. Therefore wind force is concentrated.
The driving structure 20 includes a motor and gear set 50. The motor and gear set 50 includes a motor 51 and a gear set 52 which is coupled to a spindle 511 of the motor 51. The gear set 52 includes at least one gear 521. It is shown in the drawing that the gear set 52 is connected to the spindle 511 of the motor 51. The driving sheets 15 are equally spaced arranged on the outer wall of the annular frame 11 so that these driving sheets 15 can be engaged to the gear set. When the motor 51 drives the gear set 52 to rotate, the plurality of driving sheets 15 are also driven. And thus the annular frame 11 and the blades 12 therein are driven to rotate. Thus wind flows from one side of the annular frame 11 to another side.
In the embodiment shown in
Advantages of the present invention are that the blades extend from an inner wall of the annular frame and an outer wall of the annular frame is formed with a plurality of driving sheets. A driving structure serves to drive the driving sheets so as to drive the annular frame and the blades therein to rotate. As a result, wind blows from one side to another side along an axial direction with a large strength. Therefore defects in the prior art of low wind strength and without concentrating along the axial direction are resolved.
The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
