Buckling type fan outer frame and axial flow fan

Abstract

The utility model discloses a buckling type fan outer frame and an axial flow fan, and belongs to the technical field of axial flow fans, and the buckling type fan outer frame comprises a plastic outer frame and a metal bottom frame which are connected in a buckling mode. The plastic outer frame comprises an outer frame body and a plurality of surrounding edges formed by extending from the edge of one end of the outer frame body, buckling teeth are arranged on the inner walls of the surrounding edges, buckling grooves matched with the buckling teeth are formed in the outer wall of the metal bottom frame, and the metal bottom frame is fixed among the surrounding edges through connection of the buckling teeth and the buckling grooves. An axial flow fan comprises a buckling type fan outer frame. The appearance consistency of the fan outer frame is improved, the weight of the fan outer frame is reduced, and the structural stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of axial flow fans, and particularly relates to a snap-fit ​​fan outer frame and an axial flow fan. Background Art

[0002] Considering the requirements of electronic products for heat dissipation, vibration, and low temperature rise, the outer frame of an axial fan is generally composed of a combination of plastic frame parts and metal frame parts. The plastic frame parts and the metal frame parts are usually fixed with screws and glue. Some are fixed by snapping. For example, CN209145979U discloses a shock-absorbing replaceable heat dissipation fan outer frame cover. Although the outer frame cover and the outer frame base are snap-fitted and fixed, the plastic frame is provided with a downward-extending snap hook on the outer periphery, and the metal frame is provided with a snap plate on the outer periphery. The snap hook snaps into the snap holes on the snap plate. Among them, the external snap structure causes the outer periphery of the outer frame base to be completely exposed. In addition, the thickness of the fan outer frame is relatively thick and heavy, and the outer surface of the outer frame base is exposed on a large area, resulting in low appearance consistency of the fan outer frame. Utility Model Content

[0003] The utility model provides a snap-fit ​​fan outer frame and an axial flow fan, which are used to solve the problem of low appearance consistency of the current fan outer frame.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A snap-fit ​​fan outer frame, comprising a plastic outer frame and a metal bottom frame that are snap-fitted together;

[0006] The plastic outer frame includes an outer frame body and several surrounding edges formed by extending from the edge of one end of the outer frame body. The inner wall of the surrounding edge has a buckle tooth, and the outer wall of the metal bottom frame has a buckle groove that cooperates with the buckle tooth. The metal bottom frame is fixed between the several surrounding edges by connecting the buckle tooth and the buckle groove.

[0007] Specifically, the plurality of surrounding edges include two oppositely disposed first surrounding edges and a second surrounding edge, and the inner walls of the first surrounding edge and the inner walls of the second surrounding edge are both raised to form buckles.

[0008] Specifically, a plurality of notches are formed on the outer wall of the metal bottom frame, and the surrounding edges are embedded in the notches in a one-to-one correspondence.

[0009] Specifically, the surrounding edge is L-shaped.

[0010] Specifically, the clasp includes two tooth bodies, and the two tooth bodies are respectively located at two ends of the surrounding edge.

[0011] Specifically, the metal bottom frame includes a bottom frame body, a base arranged at the center of the bottom frame body, and a front portion of the stator blade with one end fixedly connected to the bottom frame body and the other end fixedly connected to the base;

[0012] The plastic outer frame includes an air duct opened in the center of the outer frame body and one end is fixedly connected to the inner wall of the air duct and the other end abuts against the rear of the stator blade of the base;

[0013] As the plastic outer frame is buckled with the metal bottom frame, the front portion of the stator blade and the rear portion of the stator blade are spliced ​​together to form the stator blade. The combined stator blade not only ensures the blade body length for diverting flow, but also reduces the weight of the bottom frame body.

[0014] Specifically, the surface of the rear portion of the stationary blade facing the base is an arc surface, and the arc surface is tightly fitted with the outer wall of the base.

[0015] Specifically, the plastic outer frame includes one end fixedly connected to the inner wall of the air duct and the other end abutting the bottom of the wire trough of the base. The metal bottom frame includes one end fixedly connected to the bottom frame body and the other end fixedly connected to the wire trough edge of the base. As the plastic outer frame and the metal bottom frame are buckled together, the wire trough bottom and the wire trough edge are spliced ​​to form a wire trough.

[0016] The utility model also discloses an axial flow fan, which comprises a snap-fit ​​fan outer frame.

[0017] The technical solution provided by the utility model has the following advantages compared with the existing technology:

[0018] 1. The plastic outer frame wraps and buckles with the metal base frame to ensure a rigid connection between the two. At the same time, the plastic outer frame serves as the external structure of the fan outer frame, improving the appearance consistency of the fan outer frame;

[0019] 2. The buckles and grooves between the plastic frame and the metal bottom frame are built in, and the inner and outer surfaces of the fan frame are smooth without protrusions, which does not interfere with the airflow direction, further improving the appearance consistency of the fan frame and also improving the installation adaptability of the fan frame.

[0020] 3. The stator blades are divided into two parts along with the fan frame. The metal base frame only has a part of the stator blades, which ensures the length of the stator blade body used for diversion and also reduces the volume and weight of the metal base frame. On this basis, the thickness of the metal base frame is reduced, the exposed area of ​​the outer surface of the metal base frame is further reduced, the appearance consistency of the fan frame is improved, and the overall weight of the fan frame is reduced; at the same time, the weight of the metal base frame is reduced, the connection stability of the metal base frame and the plastic frame is improved, the risk of the metal base frame detaching from the plastic frame is reduced, and the structural stability of the fan frame is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded view of the snap-fit ​​fan frame in this embodiment;

[0022] Figure 2 is a structural diagram of the plastic outer frame in this embodiment;

[0023] Figure 3 This is a structural diagram of the metal bottom frame in this embodiment;

[0024] Figure 4 1 is a diagram showing the buckled state of the plastic outer frame and the metal bottom frame in this embodiment.

[0025] As shown in the figure: 10. Plastic outer frame; 11. Outer frame body; 12. Surrounding edge; 121. First surrounding edge; 122. Second surrounding edge; 123. Third surrounding edge; 124. Fourth surrounding edge; 13. Air duct; 14. Rear of stator blade; 15. Bottom of wire trough; 16. Buckle; 20. Metal bottom frame; 21. Bottom frame body; 22. Base; 23. Front of stator blade; 24. Wire trough edge; 25. Notch; 26. Buckle groove; 27. Bushing. DETAILED DESCRIPTION

[0026] For ease of understanding, the snap-fit ​​fan frame and the axial flow fan are described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations and positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] like Figure 1 As shown, the snap-on fan frame in this embodiment includes a plastic frame 10 that wraps and snaps onto a metal base frame 20 to ensure a rigid connection between the two. The plastic frame 10 constitutes the external structure of the fan frame, making it easier for the fan frame to match the appearance of the product on which the axial fan is installed.

[0030] like Figure 2As shown, the plastic outer frame 10 includes an outer frame body 11, a peripheral edge 12 extending from one end edge of the outer frame body 11, an air duct 13 opened in the center of the outer frame body 11, a rear portion of the stator blade 14, and a cable trough bottom 15. The end face of one end of the outer frame body 11 is square, with an L-shaped peripheral edge 12 at each of the four corners of the square, for a total of four peripheral edges 12. The four peripheral edges 12 are respectively a first peripheral edge 121 and a second peripheral edge 122, which are arranged oppositely, and a third peripheral edge 123 and a fourth peripheral edge 124, which are arranged oppositely. In other words, the corners at which the first peripheral edge 121 and the second peripheral edge 122 are diagonally opposite corners of the square, and the corners at which the third peripheral edge 123 and the fourth peripheral edge 124 are also diagonally opposite corners of the square. The air duct 13 has an air inlet end facing the metal base frame 20. Eight ribs are arranged on the inner ring of the air duct 13 at the air inlet end. Seven of these ribs form the stator blade rear portion 14, and one forms the wire trough bottom 15. One end of the stator blade rear portion 14 is fixedly connected to the inner wall of the air duct 13, while the other end faces the center of the air duct 13. Similarly, one end of the wire trough bottom 15 is fixedly connected to the inner wall of the air duct 13, while the other end faces the center of the air duct 13. The surfaces of the stator blade rear portion 14 and the wire trough bottom 15 facing the center of the air duct 13 are arcuate surfaces.

[0031] like Figure 2 As shown, the inner wall of the first surrounding edge 121 and the inner wall of the second surrounding edge 122 are both protruded to form a clasp 16 . The clasp 16 includes two tooth bodies, and the two tooth bodies are respectively located at the two ends of the surrounding edge 12 .

[0032] like Figure 3 As shown, the metal base frame 20 includes a base frame body 21, a base 22 disposed at the center of the base frame body 21, and a stator blade front portion 23 and a wire trough edge 24 disposed between the base frame body 21 and the base 22. The base frame body 21 is square, with an L-shaped notch 25 at each of its four corners. The outer wall of the metal base frame 20 has a buckle groove 26, which includes two groove bodies, one at each end of the notch 25. One end of the stator blade front portion 23 is fixedly connected to the base frame body 21, and the other end is fixedly connected to the base 22. Similarly, one end of the wire trough strip is fixedly connected to the base frame body 21, and the other end is fixedly connected to the base 22. The base 22 is circular, and a shaft sleeve 27 is disposed at the center of the base 22.

[0033] like Figure 1 and Figure 4 As shown, the surrounding edges 12 are embedded in the notches 25 in a one-to-one correspondence, wrapping the outer corners of the metal bottom frame 20, and the outer surface of the fan outer frame is smooth without protrusions.

[0034] Continue as Figure 1 and Figure 4As shown, the teeth 16 engage with the grooves 26, meaning the teeth snap into place in a one-to-one correspondence with the grooves. The metal base frame 20 is secured between the four surrounding edges 12 by the engagement of the teeth 16 and the grooves 26. The interlocking structure is built into the junction of the plastic outer frame 10 and the metal base frame 20. The interlocking structure eliminates protrusions on either the inner or outer surfaces of the fan outer frame, improving the appearance consistency and installation adaptability of the fan outer frame while also preventing protrusions on the inner wall of the fan outer frame from interfering with airflow.

[0035] Continue as Figure 1 and Figure 4 As shown, as the plastic outer frame 10 and the metal bottom frame 20 are buckled together, the front portion 23 of the static blade and the rear portion 14 of the static blade are spliced ​​together to form a static blade, and the wire groove bottom 15 and the wire groove edge 24 are spliced ​​together to form a wire groove, wherein the arc surface of the rear portion 14 of the static blade and the wire groove bottom 15 abuts against the outer wall of the base 22 and fits tightly with the outer wall of the base 22.

[0036] The static blades are divided into two parts along with the fan outer frame, which ensures the length of the blade body used for diversion and reduces the load weight of the bottom frame body 21. The connection stability of the metal bottom frame and the plastic outer frame after buckling is improved, and the metal bottom frame is not easy to separate from the plastic outer frame.

[0037] The axial-flow fan in this embodiment includes a snap-fit ​​fan frame.

[0038] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some or all of the technical features therein may be replaced with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the various embodiments of the present invention.

Claims

1. A snap-fit ​​fan frame, characterized in that: It includes a plastic outer frame and a metal bottom frame that are snap-connected; The plastic outer frame includes an outer frame body and several surrounding edges formed by extending from the edge of one end of the outer frame body. The inner wall of the surrounding edge has a buckle tooth, and the outer wall of the metal bottom frame has a buckle groove that cooperates with the buckle tooth. The metal bottom frame is fixed between the several surrounding edges by connecting the buckle tooth and the buckle groove.

2. The snap-fit ​​fan frame according to claim 1, wherein: The plurality of surrounding edges include two oppositely arranged first surrounding edges and a second surrounding edge, and the inner walls of the first surrounding edge and the inner walls of the second surrounding edge are both raised to form buckles.

3. The snap-fit ​​fan frame according to claim 1, wherein: The outer wall of the metal bottom frame is provided with a plurality of notches, and the surrounding edges are embedded in the notches in a one-to-one correspondence.

4. The fan frame according to claim 1, wherein: The surrounding edge is L-shaped.

5. The snap-fit ​​fan frame according to claim 1, wherein: The buckle comprises two tooth bodies, and the two tooth bodies are respectively located at two ends of the surrounding edge.

6. The snap-fit ​​fan frame according to claim 1, wherein: The metal bottom frame includes a bottom frame body, a base arranged at the center of the bottom frame body, and a front portion of a stator blade with one end fixedly connected to the bottom frame body and the other end fixedly connected to the base; The plastic outer frame includes an air duct opened in the center of the outer frame body and one end is fixedly connected to the inner wall of the air duct and the other end abuts against the rear of the stator blade of the base; As the plastic outer frame is buckled with the metal bottom frame, the front portion of the stationary blade and the rear portion of the stationary blade are spliced ​​together to form a stationary blade.

7. The snap-fit ​​fan frame according to claim 6, wherein: The rear surface of the stationary blade facing the base is an arc surface, and the arc surface is tightly fitted with the outer wall of the base.

8. The snap-fit ​​fan frame according to claim 6, wherein: The plastic outer frame includes one end fixedly connected to the inner wall of the air duct and the other end abutting the bottom of the wire trough of the base. The metal bottom frame includes one end fixedly connected to the bottom frame body and the other end fixedly connected to the wire trough edge of the base. As the plastic outer frame is buckled with the metal bottom frame, the wire trough bottom and the wire trough edge are spliced ​​to form a wire trough.

9. An axial flow fan, characterized in that: It comprises the snap-fit ​​fan frame according to any one of claims 1 to 8.

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