TW201809478A - Improved structure of fan blades - Google Patents

Abstract

The present invention relates to an improved structure of fan blades, which comprises a hub, a connecting part, and a plurality of fan blades. The connecting part has a coupling section and a plurality of slits. The connecting part is sleeved around the perimeter of the hub through the coupling section. The slits are circularly disposed close to the perimeter of the connecting part. The fan blades individually have a first end and a second end; the first ends are individually embedded in the slits and combined with the connecting part. Be means of the present invention, the disadvantage of the combination through a non-integrated structure of the fan blades and the hub in the prior art can be overcome.

Description

Improved fan blade structure

An improved structure of a fan blade, in particular to an improved structure of a fan blade that improves the coupling between the fan blade and the hub.

The current fan blades are mainly integrated with the wheel hub by enveloping or welding. Among them, plastic fan blades are most commonly shot on metal wheels. In this structure, a metal hub is first put into a mold and then shot through. The molding method is to fill the outer periphery of the metal hub with molten plastic material. After the plastic material is cooled, a plurality of fan blades are formed on the outer periphery of the metal hub. However, some of the fan blades need to be equipped with ultra-thin blades. However, due to the lack of structural strength when the plastic material is too thin, the fan blades cannot perform pressure diversion, and even when the fan speed is too fast, the fan blades cannot oscillate. Others who are familiar with this technology replace the plastic blades with metal blades with strong structural strength; these metal blades are independently processed and formed by welding with the metal hub after welding, although the metal The material blade can solve the disadvantage of the insufficient strength of the plastic material blade structure. However, when the metal material blade and the metal hub are welded together, it is difficult to control the balance between the blade and the metal hub. It is also used to combine the metal blade with the metal hub. The hub welding and bonding materials also easily cause imbalance when the fan is running. Therefore, how to combine the metal fan blade with the metal hub and maintain the bonding strength between the two, while maintaining the stability and stability of the fan when it is running, is the focus of this technology.

Therefore, in order to solve the disadvantages of the above-mentioned conventional technology, the main object of the present invention is to provide an improved structure of a fan blade having a thin blade with better structural strength. To achieve the above object, the present invention provides an improved structure of a fan blade, which includes: a hub, a connecting member, and a plurality of fan blades; the connecting member has a set of connecting portions and a plurality of cavities, and the connecting member passes through the connecting member. The sockets are sleeved on the outer edge of the hub, and the ring-shaped array of recessed grooves is provided on the connecting member near the outer edge; the blades have a first end and a second end, and the first of the blades The ends are embedded in the recesses and combined with the connecting member. According to the present invention, the fan blades are fixedly combined through a connecting member, and then the connecting member is sleeved on the outer periphery of the hub, which can not only improve the easy deviation caused by the conventional welding of the fan blade and the wheel, but also the difficulty of controlling balance. The lack of it provides a simple combination structure.

The above-mentioned object of the present invention and its structural and functional characteristics will be described based on the preferred embodiments of the drawings. Please refer to FIGS. 1, 2, and 2A, which are three-dimensional exploded, combined and combined sectional views of the first embodiment of the improved structure of the fan blade of the present invention. As shown in the figure, the improved structure of the fan blade 1 of the present invention includes: a wheel hub 11 A connecting piece 12 and a plurality of fan blades 13; the hub 11 is a circular hollow shell, and the hub has a receiving space 111, an open side 112 and a closed side 113, and the open side 112 It communicates with the closed side 113 and the accommodating space 111. The connecting piece 12 has a set of connecting portions 121 and a plurality of embedded grooves 122. The connecting piece 12 is sleeved on the outer edge of the hub 11 through the connecting portion 121. The embedded grooves 122 are arranged in a circular array. The connecting member 12 is located near the outer edge, and the recessed grooves 122 may be arranged in an equidistant or non-equidistant manner. This embodiment is described in an equidistant manner, but it is not limited thereto. The socket part 121 is a through hole and connects the upper and lower sides of the connecting piece 12, that is, the connecting piece 12 forms an annular structure, and the connecting piece 12 and the hub 11 are tightly fitted through Bonding or fixed bonding by welding. The fan blades 13 have a first end 131 and a second end 132. The first and second terminals 131 and 132 are respectively disposed at both ends of the fan blades 13, and the first ends 131 of the fan blades 13 correspond to each other. Embedded in the inserting grooves 122 of the connecting member 12, thereby being combined with the connecting member 12. The material of the aforementioned connecting piece 12 may be any one of plastic or metal, and if the connecting piece 12 is made of metal, the first ends 131 of the blades 13 are embedded in the recessed grooves 122 by a tight fit. The first end 131 of the fan blade 13 is welded with the embedded groove 122 of the connecting member 12 by laser welding, or is integrated with the connecting member 12 by riveting. Alternatively, the fan blades 13 may be set in a mold (not shown), and then the connector 12 structure is ejected by injection molding to combine the fan blades 13 with the connector 12. The height of the fan blades at the first end 131 of the fan blades 13 can be selected to be less than or equal to the height of the second end 132. In this embodiment, the height of the first end 131 is less than the height of the second end 132. Examples, but not limited. The fan blades 13 are selected to be in an arc shape or a non-arc shape, and this embodiment uses the arc shape as an illustrative embodiment, but is not limited thereto. Please refer to Figs. 3 and 4, which are three-dimensional exploded and combined diagrams of the second embodiment of the improved structure of the fan blades of the present invention. As shown in the figure, this embodiment is the same as the first embodiment in part and will not be repeated here. To reiterate, the difference between this embodiment and the first embodiment is that the hub 11 of this embodiment further has a plurality of grooves 114, and the annular array of the grooves 114 is provided at the outer edge of the hub 11, and the connecting member 12 The socket part 121 has a plurality of convex bodies 123 corresponding to the grooves 114 and are correspondingly embedded in the grooves 114. The arrangement of this structure can increase the bonding strength of the hub 11 and the connecting piece 12 and prevent The connecting member 12 is loosened from the hub 11. The groove 114 is selected to be a square or a triangle, a semicircle or a ladder, and the convex bodies 123 are corresponding to the structure of the groove 114 and have a concave and convex structure. The example uses a triangle as an illustrative embodiment but is not limited thereto. Please refer to FIG. 5 and FIG. 6, which are three-dimensional exploded and combined diagrams of the third embodiment of the improved structure of the fan blade of the present invention. As shown in the figure, this embodiment is the same as the first embodiment in part and will not be repeated here. To repeat, the difference between this embodiment and the first embodiment described above is that the hub 11 further has at least one slide groove 115 which is circumferentially arranged on the outer edge of the hub 11 and the socket of the connecting piece 12 The portion 121 further has at least one projection 124 at a position opposite to the sliding groove 115. The projection 124 is correspondingly embedded in the sliding groove 115. The end of the sliding groove 115 has a clamping groove 116. When the connecting member 12 corresponds to the hub 11, When the clockwise or counterclockwise rotation is performed, the convex block 124 can be correspondingly slid in the sliding groove 115, and when the convex block 124 is correspondingly slid into the clamping groove 116, the connecting piece 12 and the hub 11 are made. If it is engaged, if the protrusion 124 is moved out of the slot 116, the engagement is released. Please refer to FIG. 7 and FIG. 8, which are three-dimensional exploded and combined diagrams of the fourth embodiment of the improved structure of the fan blade of the present invention. As shown in the figure, this embodiment is the same as the first embodiment in part and will not be repeated here. To reiterate, the difference between this embodiment and the aforementioned first embodiment is that the hub 11 further has an external thread 117, the external thread 117 is ringed at the outer edge of the hub 11, and the sleeve portion of the connecting member 12 121 has an internal thread 125 corresponding to the external thread 117, and the internal and external threads 125 and 117 are combined or separated by means of a forward or reverse rotation spiral. The hubs, the blades 13 and the connecting members 12 in the first to fourth embodiments can be made of the same material or different materials, and can be made by stamping. In addition, the combination of the fan blades 13 and the connecting member 12 can also force the fan blades 13 into the recessed grooves 122 of the connecting member 12 by means of rapid stamping, which can not only achieve rapid assembly but also improve The degree of combination of the fan blades 13 and the connecting member 12.

1‧‧‧ Improved fan blade structure
11‧‧‧ Wheel
111‧‧‧accommodation space
112‧‧‧Open side
113‧‧‧ closed side
114‧‧‧Groove
115‧‧‧chute
116‧‧‧Card slot
117‧‧‧external thread
12‧‧‧ Connector
121‧‧‧Socket
122‧‧‧ Recessed
123‧‧‧ convex
124‧‧‧ bump
125‧‧‧ Internal thread
13‧‧‧fan leaves
131‧‧‧ the first end
132‧‧‧ the second end

Fig. 1 is a perspective exploded view of the first embodiment of the improved structure of the fan blade of the present invention; Fig. 2 is a perspective combined view of the first embodiment of the improved structure of the fan blade of the present invention; Sectional sectional view of the first embodiment of the structure; Figure 3 is an exploded perspective view of the second embodiment of the improved structure of the fan blade of the present invention; Figure 4 is a perspective combined view of the second embodiment of the improved structure of the fan blade of the present invention; Fig. 5 is a perspective exploded view of the third embodiment of the improved structure of the fan blade of the present invention; Fig. 6 is a perspective combined view of the third embodiment of the improved structure of the fan blade of the present invention; The third embodiment is an exploded perspective view of the fourth embodiment; FIG. 8 is a three-dimensional combined view of the fourth embodiment of the improved structure of the fan blade of the present invention.

1‧‧‧ Improved fan blade structure

11‧‧‧ Wheel

12‧‧‧ Connector

121‧‧‧Socket

122‧‧‧ Recessed

13‧‧‧fan leaves

131‧‧‧ the first end

132‧‧‧ second end

Claims (7)

An improved structure of a fan blade includes: a hub; a connecting member having a set of connecting portions and a plurality of embedded grooves; the connecting members are sleeved on the outer edge of the hub through the connecting portions; A portion of the connecting member near the outer edge; a plurality of fan blades having a first end and a second end, and the first ends of the fan blades are embedded in the recesses and combined with the connecting member . According to the improved structure of the fan blades described in item 1 of the patent application scope, the height of the fan blades at the first end of the fan blades may be selected to be less than or equal to any of the height of the fan blades at the second end. For example, the improved structure of the fan blades described in item 1 of the patent application range has a plurality of grooves. The annular array of the grooves is arranged at the outer edge of the hub, and the socket part of the connector has a plurality of corresponding grooves. The convex bodies are correspondingly embedded in the grooves. According to the improved fan blade structure described in item 3 of the patent application scope, wherein the groove is selected as any one of a square or a triangle, a semicircle or a ladder, the convex systems correspond to the shape of the groove and are Concave and convex structure with groups. The improved fan blade structure as described in the first item of the patent application scope, wherein the fan blades are selected to be either curved or non-curved. The improved blade structure according to item 1 of the scope of patent application, wherein the hub further has at least one chute, the chute ring is provided on the outer edge of the hub, and the sleeve part of the connector is opposite to the chute. There is at least one protruding block, and the protruding block is correspondingly embedded in the sliding groove. The improved blade structure according to item 1 of the patent application scope, wherein the hub further has an external thread, the external thread ring is provided on the outer edge of the hub, and the socket portion of the connector corresponds to the external thread. It has an internal thread, and the internal and external threads are combined or separated by means of a forward or reverse spiral.