TWI591263B - Fan wheel structure - Google Patents

Description

Fan fan wheel structure

The present invention is a heat dissipating component, and more particularly to a fan fan wheel structure.

The fan is a common part in the field of electronic heat dissipation. It is usually made of metal or plastic. When the blade is made of plastic, it is made by injection molding. Therefore, the blade has a certain thickness of usually more than 0.3mm, and because of the plastic material characteristics, the fan The leaves should not be too thin to prevent the fan blades from being able to withstand windage breakage during rotation. Therefore, the thickness of the blade is reduced to make it an ultra-thin blade and has considerable strength, and how to combine the ultra-thin blade with the hub of the fan, and how to avoid increasing the number of ultra-thin blades to cause uneven wheel load. The problem is the current efforts of the industry.

Accordingly, in order to effectively solve the above problems, it is an object of the present invention to provide a fan fan structure in which a cover body is combined with an ultra-thin blade to increase the fixing strength of the blade.

Another object of the present invention is to provide a fan fan structure in which a blade and a cover are coupled to each other via a cover and a hub to omit the use of a welding method to improve the unevenness of the hub load.

Another object of the present invention is to provide a blade that is not directly connected to the hub, but is connected to the hub by the cover body to fix the blade around the hub, thereby improving the direct welding or snap connection of the conventional blade and the hub. The problem of the joint being easily broken.

In order to achieve the above object, the present invention provides a fan fan wheel structure, comprising: a cover body having a pair of joint sides and a plurality of joint groove systems spaced apart around the cover body, each of the joint grooves being provided with a fastening component and a limit a spacing portion adjacent to the fastening component and a plurality of bonding spaces located outside the fastening component; a hub having a top surface and an accommodating space defined on the top surface, wherein the abutting side of the cover body is coupled with the top surface; the plurality of blades are circumferentially coupled with the cover body, and each blade has a coupling end projects in a radial direction of the hub and along a radial direction of the hub into the accommodating space, and a free end protrudes in a direction opposite to a center of the hub and along a radial direction of the hub to An outer circumference of the hub, the coupling end is coupled with the coupling groove of the cover body, and has a coupling recess buckled by the fastening component in the coupling groove to fix the blades, the coupling end having two buckle arms located at the joint The two sides of the notch and the clamping member are clamped, wherein the binding end and the two fastening arms are located in the joint space, and the fastening component of the cover body and the limiting portion axially press and fix the joint end And the two buckle arms are arranged in parallel with the two buckle arms.

In one implementation, the binding end has two snap arms on either side of the coupling recess and clamps the clamping element.

In one implementation, the cover is an annular cover and has a central through hole.

In one implementation, the cover is joined to the top surface of the hub in an injection molded manner.

In one implementation, one of the abutting side of the cover and the top surface of the hub is provided with at least one recessed receiving member, and the other is provided with at least one protruding connecting member in combination with the recessed receiving member.

In one implementation, the protruding connector is a stud or a bump; the recessed receiving member is a recessed hole. In one implementation, the hub and the cover are made of plastic; the blades are made of metal.

In another implementation, the outer edge of the top surface is provided with a side wall protruding upwardly, the side wall having a protruding end, and a plurality of slots are spaced apart from the side wall, the side wall having an inner side orientation The center of the hub and an outer side are opposite the inner side, and the accommodating space is defined in the side wall.

In one implementation, the equal-slot portions of the hub each form an insertion interface at the projecting end.

In one implementation, each blade has a plug portion between the joint end and the free end, and the plug portion is correspondingly inserted into the slot of the hub.

10‧‧‧fan wheel structure

11‧‧·wheels

111‧‧‧ top surface

112‧‧‧Side wall

1121‧‧‧ protruding end

1127‧‧‧ inside

1128‧‧‧ outside

113‧‧‧ slots

1131‧‧‧ Plug interface

114‧‧‧ accommodating space

116‧‧‧Recessed receiving parts

A‧‧‧ Center

12‧‧‧ fan leaves

121‧‧‧Interface

122‧‧‧Binding end

1221‧‧‧ combined notch

1223‧‧‧ buckle arm

123‧‧‧Free end

13‧‧‧ Cover

131‧‧‧Central through hole

132‧‧‧ joint slot

133‧‧‧Kelly components

136‧‧‧ protruding connectors

137‧‧‧ docking side

The following drawings are intended to provide a more complete understanding of the invention, and are in the The specific embodiments of the present invention are described in detail by reference to the specific embodiments herein,

1A is a schematic exploded perspective view of the present invention; FIG. 1B is a schematic view of a three-dimensional combination of the present invention; FIG. 2A is a schematic view showing a corresponding relationship between a side wall of the wheel hub and the blade; FIG. 2B is a view of the present invention FIG. 3A is a schematic perspective view of the cover body of the present invention; FIG. 3B is a schematic view showing the corresponding relationship between the cover body and the blade of the present invention; 4A is a partial cross-sectional view of the three-dimensional combination of the present invention; FIG. 4B is a partially enlarged schematic view of the right side of the fan wheel of FIG. 4A; FIG. 4C is a partially enlarged schematic view of the left side of the fan wheel of FIG. 4A; A perspective exploded view of another embodiment of the present invention.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings.

1A is a schematic exploded perspective view of the present invention; FIG. 1B is a schematic view of a three-dimensional combination of the present invention; FIG. 2A is a schematic view showing a corresponding relationship between a side wall of the wheel hub and the blade; FIG. 2B is a view of the present invention FIG. 3A is a perspective view showing another view of the cover body of the present invention; FIG. 3B is a schematic view showing the corresponding relationship between the cover body and the blade of the present invention. As shown, the fan wheel structure 10 of the present invention is, for example, a centrifugal fan wheel, and includes a hub 11 and a plurality of blades 12 and a cover 13. The hub 11 has a top surface 111, and the top surface 111 is provided with a side wall 112 protruding upward from the top surface 111. The side wall 112 is disposed around the outer edge of the top surface 111 and has a convex end 1121. The top surface 111 of the hub 11 is protruded, and the side wall 112 has a plurality of slots 113 which are spaced apart and respectively The protruding end 1121 forms a socket 1131 (shown in FIG. 2A ). The side wall 112 has an inner side 1127 facing a center A of the hub 11 and an outer side 1128 opposite the inner side 1127 , and an accommodating space. The 114 series is defined in the inner side 1127 of the side wall 112 and on the top surface 111.

The blades 12 are surrounded by the side wall 112, and as shown in Figures 2A and 2B, each of the blades 12 has a socket 121 corresponding to the slot 113 of the hub 11, and then from the socket 1131 is axially inserted into the slot 113. The insertion portion 121 protrudes toward the center of the hub 11 along a radial direction of the hub 11 and has a coupling end 122 located in the receiving space 114 of the inner side 1127 of the side wall 112. The coupling end 122 has a coupling recess 122. On the top surface 111 of the hub 11, two latching arms 1223 are formed on both sides of the coupling recess 1221. The latching portion 121 has a free end 123 protruding toward the center A of the hub 11. Since the insertion portion 121 extends the inner end 1127 of the side wall 112, and then the free end 123 extends outside the outer side 1128 of the side wall 112, the insertion portion 121 is located at the joint end 122. And between the free ends 123.

The cover body 13 is coupled to the top surface 111 of the hub 11 and is located in the accommodating space 114 of the inner side 1127 of the side wall 112. The cover body 13 has an annular cover body having a central through hole 131 and a plurality of coupling slots. 132 and a pair of joint sides 137 (shown in FIG. 3A ) correspondingly to the top surface 111 of the hub 11 , as shown in FIGS. 3A and 3B , each of the coupling grooves 132 is provided with a fastening component 133 for supporting the fans. The coupling recess 1221 and the limiting portion 1331 of the leaf 12 are adjacent to the fastening component 133 and the plurality of bonding spaces are located outside the fastening component 133 (as shown in FIG. 4B ), wherein the coupling slots 132 respectively The binding end 122 of the blade 12 is inserted into the coupling recess 1221 such that the engaging end 122 and the two latching arms 1223 are located in the combined space, and the cover is The fastening component 133 of the 13 and the limiting portion 1331 axially press and fix the coupling end 122 and the two fastening arms 1223, and the fastening component 133 and the limiting portion 1331 are parallel with the two fastening arms 1223. The arrangement of the blades (as shown in FIG. 4B) is used to fix the blades 12, and the buckle arms 1223 on both sides of the coupling recess 1221 are at the fastening member 133. After the buckle is inserted into the coupling recess 1221, the homeopath clip The locking member 133 is clamped so that the joint end 122 of the blade 12 is more firmly coupled with the cover 13 to prevent the blade 12 from being thrown out due to the centrifugal force of the operation of the hub 11.

The material of the fan blade 12 of the present invention is made of a metal, and the thickness of the blade 12 is preferably less than 0.15 mm, and the material of the hub 11 and the cover 13 can be plastic. Made by injection molding.

Referring to FIGS. 1A and 3A, the top surface 111 of the hub 11 is provided with at least one recessed receiving member 116 such as a recessed hole, and the recessed receiving members 116 are spaced apart from the inner side 1127 of the side wall 112 (eg, As shown in FIG. 1A, the abutting side 137 of the cover 13 is provided with at least one protruding connecting member 136, such as a stud or a convex piece, for the top surface 111 of the hub, but is not limited thereto. The opposite is also possible. In particular, as shown in FIGS. 4A, 4B, and 4C, after the protruding connector 136 is inserted through the recess receiving member 116, the through end of the protruding connecting member 163 is formed into a fixing head through a hot riveting process. The diameter of the fixing head is larger than the inner diameter of the recess receiving member 116 (as shown in FIG. 4C), so that the cover 13 is fixed to the top surface 111 of the hub 11, and the combined end 122 of the blade 12 is tight. The coupling recess 1121 and the two fastening arms 1223 are tightly fastened to the fastening member 133 (as shown in FIG. 4B).

The aforementioned hot riveting process is a two-stage process. In the first stage, the cover body 13 and the blade 12 and the hub 11 are pre-combined and placed on the machine table, and are directly blown to the protruding connecting member 136 of the cover body 13 by hot air, and the hot air temperature is plasticized according to the plastic material of the cover body 11. Depending on the temperature. In the second stage, a cold rivet pile having a formed head shape is pressed down on the protruding connecting member 136, and the rivet forming type is performed to form a fixing head at the through end of the protruding connecting member 163, and then the cover is completed while cooling. 13 is combined with the hub 11.

However, without being limited thereto, in another alternative implementation, the blade 12 and the hub 11 are combined and put into a mold, and then the cover 13 is directly formed on the top surface 111 of the hub 11 by injection molding. It is combined with the combined end 122 of the blade 12. In addition, in another alternative embodiment, the cover body 13 and the hub 11 respectively define corresponding through holes, and then rivets of plastic material or metal material are inserted into the through holes of the cover body 13 and the hub 11 to combine the two.

Furthermore, the present invention is not limited to the above-described implementation. In another alternative embodiment, as shown in FIG. 5, the side wall 112 of the aforementioned hub 11 may also be omitted, so that the joint end 122 of the blade 12 is preceded by the cover 13 The coupling groove 132 is combined to be circumferentially and radially disposed around the cover body 13, and then the abutting side 137 of the cover body 13 is combined with the top surface 111 of the hub 11 to fix the blades 12 to the hub 11. The top surface 111 extends radially toward the outside of the hub 11.

As described above, the present invention is formed in the accommodating space 114 by the insertion portion 122 of the blade 12 in the radial direction of the hub 11 and is coupled to the hub 11 via the cover 13 so that The blade 12 is fixed around the hub 11 to enhance the bonding strength between the blade 12 and the hub 11, and the problem that the blade or the hub is directly welded or snap-connected to cause the joint to be easily broken is improved, and the welding joint is improved. The problem of uneven wheel load is known.

It is to be understood that the above-described methods, shapes, configurations, and devices of the present invention are intended to be included within the scope of the present invention.

10‧‧‧fan wheel structure

11‧‧·wheels

111‧‧‧ top surface

112‧‧‧Side wall

1121‧‧‧ protruding end

1127‧‧‧ inside

1128‧‧‧ outside

113‧‧‧ slots

114‧‧‧ accommodating space

116‧‧‧Recessed receiving parts

A‧‧‧ Center

12‧‧‧ fan leaves

122‧‧‧Binding end

1221‧‧‧ combined notch

123‧‧‧Free end

13‧‧‧ Cover

131‧‧‧Central through hole

132‧‧‧ joint slot

137‧‧‧Multiple fans

Claims (6)

A fan-fan structure includes: a cover body having a pair of connecting sides and a plurality of coupling slots arranged around the cover body, each of the coupling slots is provided with a fastening component and a limiting portion is spaced adjacent to the fastening component and a plurality of fan blades are disposed on the outer side of the fastening component; a hub having a top surface and an accommodating space defined on the top surface, wherein the abutting side of the cover body is coupled with the top surface; In combination with the cover body, each blade has a joint end protruding toward a central direction of the hub and protruding in a radial direction of the hub into the accommodating space, and a free end facing the center of the hub opposite thereto The engaging end protrudes from the outer side of the hub, and the engaging end is coupled with the engaging groove of the cover body, and has a coupling recess buckled by the fastening component in the coupling groove to fix the blades, the binding end has two buckle arms The two sides of the coupling recess are located on the two sides of the coupling recess and the clamping member is clamped. The fastening end and the two fastening arms are located in the joint space, and the fastening component of the cover body and the limiting portion are axially pressed and fixed. The binding end and the two fastening arms, and the two fastening arms Staggered rows combine settings. The fan fan structure of claim 1, wherein the cover is an annular cover and has a central through hole. The fan fan wheel structure of claim 1, wherein the cover body is combined with the top surface of the hub in an injection molding manner. The fan fan structure of claim 1, wherein one of the abutting side of the cover and the top surface of the hub is provided with at least one recessed receiving member, and the other is provided with at least one protruding connecting member. The recess receives the connector. The fan fan wheel structure of claim 4, wherein the protruding connector is a stud or a bump; the recessed receiving member is a recessed hole. The fan fan structure of claim 1, wherein the hub and the cover are made of plastic; the blades are made of metal.