Fan cover structure

Abstract

The utility model discloses a fan cover structure which comprises a front cover, a rear cover and an annular installation sleeve frame, and installation screw holes are formed in a first flat ring of the front cover and a second flat ring of the rear cover. The front side edge and the rear side edge of the annular mounting sleeve frame are both of an infolding structure, the front side edge is of a front infolding structure, and the rear side edge is of a rear infolding structure; the front infolding structure is a three-folding structure, and the transition surface of each folding part is an arc transition surface; the rear infolding structure is a two-fold structure, and the transition surface of each bend is an arc transition surface; mounting convex edges are formed on the front infolding structure and the rear infolding structure; and auxiliary mounting screw holes are formed in the mounting convex edges. The front side edge and the rear side edge of the annular mounting sleeve frame are both of the infolding structures, so that the structural strength can be improved, the used screws and bolts can be hidden, and compared with the mode that the bolts are combined with an annular strap or the bolts are directly used for connection and fixation, the annular mounting sleeve frame is more convenient to use and attractive in appearance.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, and in particular relates to a fan cover structure. Background Technology

[0002] A fan is a device used to generate airflow for cooling in hot weather. An electric fan is an electrically driven device that produces airflow; the internal fan rotates when powered on, creating a natural breeze to achieve a cooling effect. Currently, fans are widely used and present in people's lives. Existing fan guards generally include components such as the fan base, fan guard, motor, and fan blades. However, current fan guards still have the following shortcomings:

[0003] The front and rear grilles of fans are mostly composed of multiple circular frames, flat rings, and multiple grille spokes of different sizes. The cross-section of the flat ring is vertically flat, and the length of the flat ring extends along the radial direction of the grille. The multiple grille spokes are distributed radially from the center. The inner ends of the multiple grille spokes are welded to the central circular frame, and the outer ends of the multiple grille spokes rest on the surface of the flat ring and are welded to the flat ring. Therefore, the outer ends of the grille spokes are exposed. In addition, the front and rear grilles of fans are mostly connected and fixed by bolts combined with ring bands or by directly using bolts. Therefore, there are problems such as the sharp outer ends of the grille spokes being easy to cut users, the ring bands being difficult to align and install, the small parts being easy to lose, and the bolts and screws being exposed and unsightly.

[0004] Therefore, it is necessary to make further improvements to the structure of the fan guard. Utility Model Content

[0005] This utility model provides a fan cover structure to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A fan shroud structure includes a front shroud, a rear shroud, and an annular mounting frame. The front shroud has a first flat ring, and the rear shroud has a second flat ring, both with mounting screw holes. The front and rear edges of the annular mounting frame are both inwardly folded structures, with the front edge being a front inwardly folded structure and the rear edge being a rear inwardly folded structure. The front inwardly folded structure is a three-fold structure, and the transition surface at each bend is a circular arc transition surface. The rear inwardly folded structure is a two-fold structure, and the transition surface at each bend is a circular arc transition surface. Mounting protrusions are formed on both the front and rear inwardly folded structures, and these protrusions have auxiliary mounting screw holes.

[0008] Preferably, the front and rear sides of the annular mounting frame are both designed as downward-sloping extensions.

[0009] Preferably, both the front inward folding structure and the rear inward folding structure are formed by bending towards the inside of the annular mounting frame.

[0010] Preferably, the overall depth of the front inward folding structure bending towards the inner side of the annular mounting frame is greater than the height of the mounting protrusion of the front inward folding structure.

[0011] Preferably, the multiple circular frames on the front or rear cover are welded onto the spokes in a concentric circle arrangement.

[0012] Compared with the prior art, the advantages of this utility model are as follows: the front and rear edges of the annular mounting frame of this utility model are both inwardly folded structures. This structure not only increases the structural strength, but also hides the screws and bolts used after the front and rear covers are assembled. This design is more convenient and aesthetically pleasing than the method of connecting and fixing with bolts combined with annular bands or directly using bolts. In addition, it is worth noting that the outer ends of the spokes are also hidden in the inwardly folded structure, which improves safety to a certain extent and prevents users from being cut. Attached Figure Description

[0013] Figure 1 This is an exploded view of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of the front or rear cover of this utility model.

[0015] Figure 3 This is a schematic diagram of the assembly cross-sectional structure of this utility model.

[0016] Figure 4 This is a partially enlarged cross-sectional view of the annular mounting frame of this utility model.

[0017] Figure 5 for Figure 3 A partially enlarged structural diagram.

[0018] Figure 6 This is a diagram illustrating the assembly and use effect of this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 5As shown, this utility model is a fan cover structure, which mainly consists of a front cover 1, a rear cover 2 and an annular mounting frame 3. The first flat ring 10 of the front cover 1 and the second flat ring 20 of the rear cover 2 are both provided with mounting screw holes 4. The purpose is to connect them with the auxiliary mounting screw holes of the mounting protrusion 5 on the annular mounting frame 3 by screws, so as to fix the two on the front and rear sides of the annular mounting frame 3.

[0021] The key point to note about this utility model is that both the front and rear edges of the annular mounting frame 3 are inwardly folded structures, specifically bent inwards towards the inside of the annular mounting frame 3. The front edge is a front inwardly folded structure 11, and the rear edge is a rear inwardly folded structure 21. The front inwardly folded structure 11 is a three-fold structure, with each bend having a rounded transition surface. The rear inwardly folded structure 21 is a two-fold structure, with each bend having a rounded transition surface. This design increases the strength of the edges of the annular mounting frame 3 and conceals the mounting protrusions 5 that secure the front cover 1 and rear cover 2 within the annular mounting frame 3. This is more convenient and aesthetically pleasing than using bolts combined with annular bands or directly using bolts for connection and fixation. Furthermore, it can be explained that both the front and rear sides of the annular mounting frame 3 are designed to extend downwards, so that the inward folding structure can be hidden inside the annular mounting frame 3 after folding inwards. Also, the overall depth of the inward bending of the front inward folding structure 11 toward the inside of the annular mounting frame 3 should be greater than the height of the mounting protrusion 5 of the front inward folding structure 11.

[0022] The multiple circular frames 6 on the front cover 1 or rear cover 2 are welded to the spokes 7 in a concentric circle arrangement. This design, combined with the inward folding structure for assembling the front and rear covers, allows the outer ends of the spokes to be hidden in the inward folding structure, which improves safety to a certain extent and prevents users from being cut.

[0023] During assembly and use, the user must install the front cover 1 first, followed by the rear cover 2. Due to the inward folding structure, the front cover needs to be screwed onto the inside of the annular mounting frame 3. If the rear cover 2 is installed first, it is impossible to screw the front cover 1 onto the annular mounting frame 3. This installation method is more convenient than using bolts combined with the annular clamp, and it is more aesthetically pleasing than directly using bolts for connection and fixation. For details, please see [link to documentation]. Figure 6 .

[0024] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

Claims

1. A fan shroud structure, comprising a front shroud (1), a rear shroud (2), and an annular mounting frame (3), characterized in that, The first flat ring (10) of the front cover (1) and the second flat ring (20) of the rear cover (2) are both provided with mounting screw holes (4); the front edge and the rear edge of the annular mounting frame (3) are both inward folded structures, the front edge is a front inward folded structure (11), and the rear edge is a rear inward folded structure (21); the front inward folded structure (11) is a three-fold structure, and the transition surface of each bend is a circular arc transition surface; the rear inward folded structure (21) is a two-fold structure, and the transition surface of each bend is a circular arc transition surface; the front inward folded structure (11) and the rear inward folded structure (21) are both formed with mounting protrusions (5); the mounting protrusions (5) are provided with auxiliary mounting screw holes.

2. The fan shroud structure according to claim 1, characterized in that, The front and rear sides of the annular mounting frame (3) are both designed to extend downwards.

3. The fan shroud structure according to claim 1, characterized in that, Both the front inward folding structure (11) and the rear inward folding structure (21) are bent into shape towards the inside of the annular mounting frame (3).

4. A fan shroud structure according to claim 3, characterized in that, The overall depth of the front inward folding structure (11) bending towards the inside of the annular mounting frame (3) is greater than the height of the mounting protrusion (5) of the front inward folding structure (11).

5. A fan shroud structure according to claim 1, characterized in that, The multiple circular frames (6) on the front cover (1) or rear cover (2) are all welded to the spokes (7) based on a concentric circle arrangement.

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