Fan framework

Abstract

The utility model discloses a fan framework which comprises a main body, and the main body is provided with a center installation position used for being connected with a motor driving shaft. The mounting parts and the main body are integrally and uniformly arranged in the circumferential direction of the central mounting position at intervals, and the mounting parts approximately extend in the radial direction and are used for being connected with blades; wherein the main body and the plurality of mounting parts jointly form a first extension surface and a second extension surface which are approximately distributed along the radial direction, and the first extension surface sinks relative to the second extension surface. According to the technical scheme, the common surface of the main body of the fan framework and the mounting part integrated with the main body is divided into two extension surfaces, and one extension surface sinks relative to the other extension surface, so that the strength of the framework with the same material and the same thickness can be obviously improved at the joint of the two surfaces, damage to the framework can be reduced, and the service life of the framework is prolonged. Therefore, the purposes of reducing the fan blade cost and improving the fan efficiency are achieved while the thickness of the framework is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fan manufacturing technical field, especially relate to a fan framework. BACKGROUND

[0002] The framework of the axial flow fan is one of the important components of the fan blade, and the connection mode is to connect the blade and the framework by rivet mode. In order to improve the fan efficiency, enhance the strength of the fan blade and reduce the manufacturing cost, the fan blade is usually adjusted in the form of the blade, the framework angle and the thickness, and the thickness of the blade.

[0003] At present, in the production process of the fan framework, in order to increase the strength of the framework, the overall thickness is increased or the strengthening mode is used at the stress position of the framework. But in the situation of increasingly fierce market competition, the mode of reducing the cost is usually to reduce the thickness of the plate, and reducing the thickness of the plate often affects the strength of the framework, and the fracture may occur due to insufficient strength, thereby affecting the fan efficiency. Therefore, we urgently need to design a structure that can reduce the thickness of the framework and improve the strength of the framework. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the utility model is to provide a fan framework, which aims to solve the technical problem that the fan framework produced at present can reduce the cost while improving the strength of the framework.

[0005] In order to achieve the above purpose, the utility model provides a fan framework, which comprises:

[0006] A main body, which is provided with a central mounting position for connecting a motor driving shaft;

[0007] A plurality of mounting parts are uniformly and spacedly arranged along the circumference of the central mounting position integrally with the main body, the mounting parts extend approximately along the radial direction, and are used for connecting the blade;

[0008] Wherein, the main body and the plurality of mounting parts jointly form a first extension surface and a second extension surface which are approximately distributed along the radial direction, and the first extension surface is sunken relative to the second extension surface.

[0009] Optionally, the first extension surface is formed with a first reinforcing part relative to the connecting position of the second extension surface.

[0010] Optionally, the mounting part is provided with a plurality of rivet hole positions for riveting with the blade, and the distance between the rivet hole position and the first reinforcing part is greater than 10mm.

[0011] Optionally, the first reinforcing part is continuously arranged.

[0012] Optionally, the first reinforcing part is uniformly arranged in each mounting part along the circumference of the central mounting position.

[0013] Optionally, the mounting portion and the first reinforcing portion arranged thereon extend along the same radial direction.

[0014] Optionally, the first reinforcing portion is arranged uniformly along the circumference of the central mounting position on the main body.

[0015] Optionally, the first reinforcing portion arranged on the main body is connected to the first reinforcing portion arranged on the mounting portion, in particular, in a circular arc shape.

[0016] Optionally, the first extension surface is sunken by 3-6 mm relative to the second extension surface.

[0017] Optionally, a second reinforcing portion is formed at the connection between the first extension surface and the second extension surface, and the second reinforcing portion is distributed in a ring shape around the central mounting position.

[0018] In the technical scheme of the utility model, the common surface of the main body of the fan framework and the mounting portion integrally arranged on the main body is divided into two extension surfaces, and one of the two extension surfaces is sunken relative to the other. The design can obviously improve the strength of the framework with the same material and thickness at the connection between the two surfaces, and can reduce the damage to the framework, so as to reduce the thickness of the framework, reduce the cost of the fan blade, and improve the efficiency of the fan. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to the structures shown in the drawings without creative labor.

[0020] Figure 1 is the plan view of the conventional fan framework provided by the utility model;

[0021] Figure 2 is the perspective view of one embodiment of the fan framework provided by the utility model;

[0022] Figure 3 is the front view of Figure 1 ;

[0023] Figure 4 is the front view of another embodiment of the fan framework provided by the utility model;

[0024] Figure 5 is the sectional view of A-A section in Figure 4 ;

[0025] Explanation of signs: fan skeleton-100, first extension surface-101, second extension surface-102, first reinforcing part-103, second reinforcing part-104, main body-1, center installation position-1a, installation part-2, rivet hole position-2a.

[0026] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] In order to better describe and illustrate the embodiments of the present application, one or more drawings can be referred to, but additional details or examples used to describe the drawings should not be considered as limiting the scope of any one of the invention, the presently described embodiments or the preferred mode of the present application.

[0029] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like are based on the position relationship shown in the drawings, and are only for the convenience of describing the present application, and therefore cannot be understood as limiting the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is only for the purpose of describing specific embodiments of the present application and is not intended to limit the present application. The terms "upstream" and "downstream" refer to the relative direction with respect to the flow of fluid in the fluid passage. For example, "upstream" refers to the direction from which the fluid flows, and "downstream" refers to the direction to which the fluid flows.

[0031] However, in the case of increasingly fierce market competition, the way to reduce costs is often to reduce the thickness of the plate, and reducing the thickness of the plate often affects the strength of the skeleton, such as Figure 1 The traditional fan skeleton shown in FIG. 1 can be broken or twisted at the blade connection due to insufficient strength, thereby affecting the efficiency of the fan.

[0032] In view of this, the utility model provides a fan skeleton, Figures 2-4 For the embodiments of the fan skeleton provided by the utility model, please refer toFigures 2-4 The fan skeleton 100 is made of metal or plastic, and the metal can be steel or aluminum alloy, and the plastic can be PP or ABS.

[0033] Specifically, to ensure uniform mass distribution, the fan skeleton 100 is generally a regular plate structure, which has a main body 1 with a center installation site 1a in the center, which is usually designed as a through hole for connecting the motor drive shaft. The fan skeleton 100 also has a plurality of installation parts 2 integrally formed with the main body 1. The four installation parts 2 are uniformly and spacedly arranged along the circumference of the center installation site 1a. Each installation part 2 extends approximately along the radial direction and has a diverging tendency. Each installation part 2 is provided with a plurality of through installation holes uniformly arranged near the edge profile of the installation part 2 for connecting with the blades. It should be noted that the blades can be connected by riveting, threaded connection or the like.

[0034] The front surface of the main body 1 and the plurality of installation parts 2 together forms a first extension surface 101 and a second extension surface 102 which are approximately radially distributed. The first extension surface 101 is sunken relative to the second extension surface 102, and the connection between the two surfaces is smoothly transitioned to form a structure similar to a sunken groove. It should be understood that, in order to ensure uniform mass distribution of the fan skeleton 100 as a whole, the first extension surface 101 is sunken relative to the second extension surface 102 along the axial direction, and the included angle between the connection of the two surfaces and the axis is preferably less than 90°.

[0035] It should be understood that, on the back surface of the fan skeleton 100 opposite to the front surface, the other surface corresponding to the first extension surface 101 is raised relative to the other surface corresponding to the second extension surface 102.

[0036] In the technical solution, by dividing the common surface of the main body 1 of the fan skeleton 100 and the installation parts 2 integrally formed with the main body 1 into two extension surfaces, and one of the two extension surfaces is sunken relative to the other, the connection between the two surfaces can significantly improve the strength of the skeleton with the same material and thickness, and can also reduce the damage to the skeleton, thereby reducing the thickness of the skeleton while reducing the cost of the fan blade and improving the efficiency of the fan.

[0037] It should be noted that, please refer to Figure 2 and 3 In an embodiment of the present application, a first reinforcing part 103 is formed at the connection between the first extension surface 101 and the second extension surface 102. Since this part is the connection between the two different surfaces, it can strengthen the torsional resistance of the skeleton in the circumferential direction, thereby improving the strength of each installation part 2 and reducing the possibility of fracture.

[0038] Further, please refer to Figure 2 and 3In an embodiment of the utility model, the installation part 2 is provided with multiple rivet hole positions 2a for riveting with the blade, the rivet hole positions 2a are evenly arranged close to the edge profile of the installation part 2, the first reinforcing part 103 of the installation part 2 extends in the middle of each rivet hole position 2a, and the shortest distance d between the rivet hole position 2a and the first reinforcing part 103 is greater than 10 mm, so that the reinforcing part can avoid affecting the fixing between the installation part 2 and the blade.

[0039] It should be understood that the first extension surface 101 and the second extension surface 102 are not necessarily complete connection planes, and can also be composed of multiple segmented planes. Therefore, the reinforcing part formed by the connection between the surfaces is not necessarily continuous, and can be multiple. Please refer to Figure 2 and 3 In an embodiment of the utility model, the first reinforcing part 103 is continuously arranged, and the shape is similar to the cross star divergence, extending on the main body 1 and the integral installation part 2 thereof. Of course, if the installation part 2 is provided with 3 or 5, the shape of the first reinforcing part 103 is similar to the trident star or the five-pointed star divergence.

[0040] As described above, the cross star distribution, in an embodiment of the utility model, please refer to Figure 2 and 3 The first reinforcing part 103 on each installation part 2 is evenly arranged along the circumference of the central mounting position 1a, that is, the first reinforcing part 103 on the four installation parts 2 is arranged at the twelve o'clock position, the three o'clock position, the six o'clock position and the nine o'clock position respectively, so that the overall mass distribution of the fan skeleton 100 is uniform.

[0041] Further, each installation part 2 and the first reinforcing part 103 arranged thereon extend approximately along the same radial direction, so that the stress received thereby is under the maximum receiving capacity.

[0042] In addition, in order to uniformly distribute the first reinforcing part 103 on the main body 1, please refer to Figure 2 and 3 In an embodiment of the utility model, the first reinforcing part 103 on the main body 1 is connected to the first reinforcing part 103 on the two adjacent installation parts 2, that is, the four first reinforcing parts 103 on the main body 1 are evenly arranged along the circumference of the central mounting position 1a, and extend along the circular arc shape, so that the entire continuous first reinforcing part 103 is similar to the cross star divergence.

[0043] As preferred, please refer to Figure 4 and 5 In an embodiment of the utility model, the first extension surface 101 is sunken axially by 3-6 mm relative to the second extension surface 102, and within this range, the strength of the fan skeleton 100 of most models can be improved.

[0044] To improve the strength at the center mounting position 1a, see Figure 2 and 3 In an embodiment of the present application, a second reinforcing portion 104 is formed at the connection between the first and second extension surfaces 101 and 102, and the second reinforcing portion 104 is annularly distributed around the center mounting position 1a, thereby reducing the stress on the through hole from the axial direction.

[0045] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present application as long as the combination does not result in contradictions.

[0046] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A fan frame (100) characterized by, The fan framework comprises: a main body (1) provided with a central mounting position (1a) for connecting a motor driving shaft; a plurality of mounting portions (2) arranged uniformly and at intervals along the circumference of the central mounting position (1a) integrally with the main body (1), the mounting portions (2) extending substantially along the radial direction for connecting blades; wherein the main body (1) and the plurality of mounting portions (2) jointly form a first extension surface (101) and a second extension surface (102) which are distributed substantially along the radial direction, and the first extension surface (101) is sunken relative to the second extension surface (102).

2. The fan frame (100) of claim 1, wherein, A first reinforcing portion (103) is formed at the junction of the first extension surface (101) and the second extension surface (102).

3. The fan frame (100) of claim 2, wherein, The mounting portion (2) is provided with a plurality of rivet hole positions (2a) for riveting with blades, and the distance between the rivet hole positions (2a) and the first reinforcing portion (103) is greater than 10 mm.

4. The fan frame (100) as claimed in claim 2, wherein, The first reinforcing portion (103) is arranged continuously.

5. The fan frame (100) according to claim 2 or 4, characterized in that The first reinforcing portion (103) is arranged uniformly along the circumference of the central mounting position (1a) in each mounting portion (2).

6. The fan frame (100) of claim 5, wherein, The mounting portion (2) and the first reinforcing portion (103) arranged thereon extend substantially along the same radial direction.

7. The fan frame (100) as claimed in claim 2 or 4, wherein, The first reinforcing portion (103) is arranged uniformly along the circumference of the central mounting position (1a) in the main body (1).

8. The fan frame (100) of claim 7, wherein, The first reinforcing portion (103) arranged on the main body (1) is connected in an arc shape with the first reinforcing portion (103) arranged on the mounting portion (2), respectively.

9. The fan frame (100) as claimed in claim 1, wherein, The first extension surface (101) is sunken by 3-6 mm relative to the second extension surface (102).

10. The fan frame (100) as claimed in claim 1, wherein, A second reinforcing portion (104) is formed at the junction of the first extension surface (101) and the second extension surface (102), and the second reinforcing portion (104) is distributed in a ring shape around the central mounting position (1a).

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