Detachable fan blade structure

Abstract

The utility model discloses a detachable fan blade structure, including blade and mounting seat, and mounting seat includes roof, and the surrounding fixed setting of ring wall has on the periphery of roof, and a plurality of installation slots are arranged on the ring wall according to preset interval, and installation slot penetrates ring wall, and the width of installation slot is same with the width of blade, and the bottom of installation slot is provided with elastic part, and the distance between elastic part and the top of installation slot is less than the thickness of blade, and the one end of blade is convex and is provided with limit stop, and the thickness of limit stop is greater than the thickness of blade, and limit stop is used to pass through ring wall from outside and forms buckle connection with the inboard of ring wall. The elastic part is arranged at the bottom of installation slot in the application, and the limit stop is arranged at one end of the blade, so that when the blade and the mounting seat are assembled, the stability of the connection between the blade and the mounting seat can be ensured by simply inserting the blade into the installation slot, and additional fastening structure is not needed. The whole assembling process is simple and convenient, and additional tools are not needed.

Description

Technical Field

[0001] This utility model relates to the field of fan blade structure, and more specifically to a detachable fan blade structure. Background Technology

[0002] Currently, most metal fan blades are fixed to their mounting bases using screws. However, screw connections are typical discrete point connections, which can cause significant stress concentrations in the localized areas where the blade root contacts the mounting base, especially at the edges of the screw holes and the thread engagement points. Under the enormous centrifugal force generated by the high-speed rotation of the fan and the cyclic loads from airflow pulsation, these stress concentration points are highly susceptible to becoming the initiation points for fatigue cracks, potentially leading to serious accidents such as blade breakage or even blade detachment, threatening equipment and personnel safety. Furthermore, to achieve reliable fastening, multiple screws are usually required, which not only increases the number of parts but also makes the assembly process cumbersome, reliant on manual operation, and requires high consistency in tightening torque, increasing assembly time and labor costs, and reducing production efficiency. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a detachable fan blade structure, including a blade and a mounting base. The mounting base includes a top plate, and an annular wall is fixedly arranged around the top plate. Several mounting grooves are arranged on the annular wall at preset intervals, and the mounting grooves penetrate the annular wall. The width of the mounting grooves is the same as the width of the blade. An elastic part is provided at the bottom of the mounting groove, and the elastic part is integrally formed with the annular wall. The distance between the elastic part and the top of the mounting groove is less than the thickness of the blade. A limiting block is protruding at one end of the blade, and the thickness of the limiting block is greater than the thickness of the blade. The limiting block is used to pass through the annular wall from the outside and form a snap-fit ​​connection with the inner side of the annular wall.

[0004] Furthermore, a first through groove is provided on both sides of the elastic part, and the first through groove penetrates the annular wall.

[0005] Furthermore, support steps are provided on both sides of the first through groove. The support steps are integrally formed with the ring wall. When the limiting block passes through the ring wall from the outside, the support steps provide support to the bottom of the blade.

[0006] Furthermore, a number of hollow mounting sleeves are provided at preset intervals on the mounting base. The mounting sleeves are fitted around the blade and one end is connected to the mounting groove. The mounting sleeve includes a support surface that fits against the top surface of the blade. Wrapping surfaces are provided at both ends of the support surface. The wrapping surfaces wrap around the side of the blade and the end of the wrapping surfaces fits against the bottom surface of the blade.

[0007] Furthermore, a positioning block is protruding from the top of the blade, and a positioning groove is provided on the side of the support surface facing the blade. When the blade is inserted into the mounting sleeve, the positioning block is inserted into the positioning groove.

[0008] Furthermore, inclined portions are provided on both sides of the limiting block, and the inclined portions are inclined along the bottom of the blade toward the top of the blade.

[0009] Furthermore, a fixing tube is provided in the middle of the mounting base, the fixing tube penetrates the top plate, and reinforcing ribs are provided on the inner side of the fixing tube and the ring wall.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This application provides an elastic part at the bottom of the mounting groove and a limiting block at one end of the blade, so that when assembling the blade and the mounting base, the connection between the two can be ensured simply by inserting the blade into the mounting groove, without the need for additional fastening structures. The entire assembly process is simple and convenient and does not require additional tools.

[0012] Additional aspects and advantages of this invention will be set forth in the description which follows, and some will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the mounting base of this utility model;

[0016] Figure 3 This is a structural schematic diagram of the mounting base of this utility model from another angle;

[0017] Figure 4 This is a schematic diagram of the blade structure of this utility model;

[0018] Figure 5 This is a structural schematic diagram of the blade of this utility model from another angle.

[0019] The reference numerals and names in the figure are as follows:

[0020] Blade 100, mounting base 200, top plate 210, ring wall 220, mounting groove 230, elastic part 231, limiting block 110, first through groove 232, supporting step 233, mounting sleeve 240, supporting surface 241, wrapping surface 242, positioning block 120, positioning groove 243, inclined part 244, fixing pipe 250, reinforcing rib 260. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] The present invention will now be described in more detail. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them.

[0023] In the description of this utility model, it should be noted that directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom," indicating directions or positional relationships, are generally based on the directions or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself. In the description of this utility model, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0025] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0026] The preferred embodiments of this utility model will now be further described with reference to the accompanying drawings. Figure 1 , Figure 2 , Figure 4 As shown, the detachable fan blade structure includes a blade 100 and a mounting base 200. The mounting base 200 includes a top plate 210, and an annular wall 220 is fixedly arranged around the top plate 210. A plurality of mounting grooves 230 are arranged on the annular wall 220 at preset intervals. The mounting grooves 230 penetrate the annular wall 220. The width of the mounting grooves 230 is the same as the width of the blade 100. An elastic part 231 is provided at the bottom of the mounting groove 230. The elastic part 231 is integrally formed with the annular wall 220. The distance h between the elastic part 231 and the top of the mounting groove 230 is less than the thickness of the blade 100. A limiting block 110 is protruding at one end of the blade 100. The thickness of the limiting block 110 is greater than the thickness of the blade 100. The limiting block 110 is used to pass through the annular wall 220 from the outside and form a snap-fit ​​connection with the inner side of the annular wall 220.

[0027] This application mainly relates to a fixing structure between a fan blade and a mounting base 200, which can be applied to, for example, the fixed connection between a fan blade 100 and its mounting base 200. In this embodiment, the blade 100 is fixed to the mounting base 200 via a mounting groove 230. In specific operation, one end of the blade 100 with a limiting block 110 is aligned with the mounting groove 230 and inserted. During insertion, since the distance h between the elastic part 231 and the top of the mounting groove 230 is less than the thickness of the blade 100, and the thickness of the limiting block 110 is greater than the thickness of the blade 100, the blade 100 and the limiting block 110... When the 10 passes through the mounting groove 230, the elastic part 231 will bend. After the limiting block 110 has completely passed through the mounting groove 230, the elastic part 231 will return to its original state, thereby clamping the blade 100 in the mounting groove 230. At the same time, the limiting block 110 passes through the annular wall 220 and forms a snap-fit ​​connection with the inner side of the annular wall 220. In this way, when the mounting base 200 drives the blade 100 to rotate, the blade 100 will not detach from the mounting base 200 under the action of centrifugal force. When it is necessary to disassemble the blade 100 and the mounting base 200, it is only necessary to bend the elastic part 231 and push the limiting block 110 out of the mounting groove 230.

[0028] Compared with the prior art, this application provides an elastic part 231 at the bottom of the mounting groove 230 and a limiting block 110 at one end of the blade 100, so that when assembling the blade 100 and the mounting base 200, it is only necessary to insert the blade 100 into the mounting groove 230 to ensure the stability of the connection between the two, without the need for additional fastening structures. The entire assembly process is simple and convenient and does not require additional tools.

[0029] Further, based on the above embodiments, such as Figure 2 As shown, first through grooves 232 are provided on both sides of the elastic part 231, and the first through grooves 232 penetrate the annular wall 220. Because of the presence of the first through grooves 232, when the blade 100 and the limiting block 110 pass through the mounting groove 230, as... Figure 2 As shown, the elastic part 231 can have a better bending effect.

[0030] Further, based on the above embodiments, such as Figure 2 As shown, support steps 233 are provided on both sides of the first through groove 232. The support steps 233 are integrally formed with the annular wall 220. When the limiting block 110 passes through the annular wall 220 from the outside, the support steps 233 provide support for the bottom of the blade 100. In this way, compared with simply using the elastic part 231 to support the bottom of the blade 100, the support steps 233 can assist the elastic part 231 in providing better support for the bottom of the blade 100.

[0031] Furthermore, based on the above embodiments, combined with Figure 1 and Figure 3 As shown, a plurality of hollow mounting sleeves 240 are provided at preset intervals on the mounting base 200. Each mounting sleeve 240 is fitted around the blade 100 and one end communicates with the mounting groove 230. Each mounting sleeve 240 includes a support surface 241 that fits against the top surface of the blade 100. Wrapping surfaces 242 are provided at both ends of the support surface 241, wrapping the sides of the blade 100 and having their ends fitted against the bottom surface of the blade 100. Thus, when the blade 100 is assembled with the mounting sleeve 240, the mounting sleeve 240 can assist the mounting groove 230 in better securing the blade 100.

[0032] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 4As shown, a positioning block 120 protrudes from the top of the blade 100, and a positioning groove 243 is provided on the side of the support surface 241 facing the blade 100. When the blade 100 is inserted into the mounting sleeve 240, the positioning block 120 is inserted into the positioning groove 243. In this way, when the mounting base 200 drives the blade 100 to rotate, it can further prevent the blade 100 from detaching from the mounting base 200 under the action of centrifugal force.

[0033] Further, based on the above embodiments, such as Figure 5 As shown, inclined portions 244 are provided on both sides of the limiting block 110, and the inclined portions 244 are inclined along the bottom of the blade 100 toward the top of the blade 100. This makes it easier for the sides of the blade 100 to enter the wrapping surface 242 when it is inserted into the mounting sleeve 240.

[0034] Further, based on the above embodiments, such as Figure 3 As shown, a fixing tube 250 is provided in the middle of the mounting base 200. The fixing tube 250 penetrates the top plate 210 and is used to install the drive shaft of the motor (not shown in the figure). Reinforcing ribs 260 are provided on the inner side of the fixing tube 250 and the annular wall 220. The reinforcing ribs 260 are used to increase the strength of the annular wall 220 and the top plate 210.

[0035] The details of the above exemplary embodiments are provided, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A detachable fan blade structure, characterized in that, The device includes a blade (100) and a mounting base (200). The mounting base (200) includes a top plate (210), and an annular wall (220) is fixedly arranged around the top plate (210). A plurality of mounting grooves (230) are arranged on the annular wall (220) at predetermined intervals. The mounting grooves (230) penetrate the annular wall (220), and the width of each mounting groove (230) is the same as the width of the blade (100). A spring is provided at the bottom of each mounting groove (230). The elastic part (231) is integrally formed with the ring wall (220). The distance between the elastic part (231) and the top of the mounting groove (230) is less than the thickness of the blade (100). A limiting block (110) is protruding from one end of the blade (100). The thickness of the limiting block (110) is greater than the thickness of the blade (100). The limiting block (110) is used to pass through the ring wall (220) from the outside and form a snap-fit ​​connection with the inner side of the ring wall (220).

2. The detachable fan blade structure according to claim 1, characterized in that, A first through groove (232) is provided on both sides of the elastic part (231), and the first through groove (232) penetrates the annular wall (220).

3. The detachable fan blade structure according to claim 2, characterized in that, Support steps (233) are provided on both sides of the first through groove (232). The support steps (233) are integrally formed with the ring wall (220). When the limiting block (110) passes through the ring wall (220) from the outside, the support steps (233) provide support for the bottom of the blade (100).

4. The detachable fan blade structure according to claim 1, characterized in that, A plurality of hollow mounting sleeves (240) are provided at preset intervals on the mounting base (200). The mounting sleeves (240) are fitted around the blade (100) and one end communicates with the mounting groove (230). The mounting sleeves (240) include a support surface (241) that is in contact with the top surface of the blade (100). Wrapping surfaces (242) are provided at both ends of the support surface (241). The wrapping surfaces (242) wrap around the side of the blade (100) and the end of the wrapping surfaces (242) is in contact with the bottom surface of the blade (100).

5. The detachable fan blade structure according to claim 4, characterized in that, A positioning block (120) is protruding from the top of the blade (100), and a positioning groove (243) is provided on the side of the support surface (241) facing the blade (100). When the blade (100) is inserted into the mounting sleeve (240), the positioning block (120) is inserted into the positioning groove (243).

6. The detachable fan blade structure according to claim 5, characterized in that, Inclined portions (244) are provided on both sides of the limiting block (110), and the inclined portions (244) are inclined along the bottom of the blade (100) toward the top of the blade (100).

7. The detachable fan blade structure according to claim 1, characterized in that, A fixing tube (250) is provided in the middle of the mounting base (200), the fixing tube (250) penetrates the top plate (210), and a reinforcing rib (260) is provided on the inner side of the fixing tube (250) and the ring wall (220).

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