Fan blade fixing structure and electric fan applying same

Abstract

The utility model discloses a fan blade fixing structure and discloses a fan with the fan blade fixing structure, the fan blade fixing structure is characterized in that a plurality of mounting parts which are sequentially distributed in the circumferential direction extend from a hub, and each mounting part is provided with a clamping head and a limiting rib; inserting cavities are formed in the ends of the blades, bayonets and limiting grooves are formed in the side walls of the inserting cavities, the mounting parts can be inserted into the inserting cavities in a one-to-one matching mode, the clamping heads can be clamped into the bayonets so as to limit the blades to be separated from the mounting parts in the radial direction of the hub, and the limiting ribs are inserted into the limiting grooves so as to limit the blades to deviate in the circumferential direction of the hub; the whole structure is simple, installation is convenient, different blades can be adapted, the blades and the hub can be rapidly positioned and fixed in the radial direction through cooperation of the clamping heads and the clamping openings, and the blades and the hub can be rapidly positioned and fixed in the circumferential direction through cooperation of the limiting grooves and the limiting ribs.

Description

Technical Field

[0001] The utility model relates to a fan, in particular to a fan blade fixing structure. Background Art

[0002] Traditional fans use methods like injection molding or welding to integrate the blades and hub. These components cannot be disassembled or replaced, and they take up significant space during packaging and transportation. Some existing fans use a detachable connection between the blades and hub. Typically, each blade is secured to the hub using multiple screws, resulting in inefficient assembly. Utility Model Content

[0003] The present invention aims to solve at least one of the above-mentioned technical problems in the related art to a certain extent. To this end, the present invention proposes a fan blade fixing structure.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] The utility model also provides a fan with the above-mentioned fan blade fixing structure.

[0006] The fan blade fixing structure according to the first embodiment of the present invention includes:

[0007] A wheel hub, from which a plurality of mounting portions distributed in sequence along the circumferential direction are extended, and the mounting portions are provided with a clamping head and a limiting rib;

[0008] Multiple blades, an insertion cavity is provided on the end of the blade, a bayonet and a limit groove are provided on the side wall of the insertion cavity, the mounting portion can be paired and inserted into the insertion cavity one by one, the clamp head can be snapped into the bayonet to limit the blade from detaching from the mounting portion along the radial direction of the hub, and the limiting rib is inserted into the limiting groove to limit the blade from deviating in the circumferential direction of the hub.

[0009] The fan blade fixing structure according to the embodiment of the utility model has at least the following beneficial effects: the overall structure is simple, the installation is convenient, and it can adapt to different blades. The combination of the clamp and the bayonet facilitates the rapid positioning and fixing of the blades and the hub in the radial direction. The combination of the limiting groove and the limiting rib facilitates the rapid positioning and fixing of the blades and the hub in the circumferential direction.

[0010] According to some embodiments of the present invention, the mounting portion is plate-shaped and extends from the peripheral wall of the hub along the radial direction of the hub.

[0011] According to some embodiments of the present invention, the mounting portion is inclined with respect to the axial direction of the hub.

[0012] According to some embodiments of the present invention, at least two limiting ribs are provided on the mounting portion, and each limiting rib is distributed along the circumference of the hub.

[0013] According to some embodiments of the present invention, one end of the limiting rib is connected to the peripheral wall of the hub.

[0014] According to some embodiments of the present invention, the limiting rib protrudes from the surface of the mounting portion along the axial direction of the hub, the two sides of the limiting rib are parallel plane sides, the plane sides are parallel to the axial direction of the hub, the side of the limiting rib away from the mounting portion is set as a sloped side, and the cross-section of the limiting rib gradually expands from the end away from the hub to the end close to the hub.

[0015] According to some embodiments of the present invention, at least a portion of the limiting rib protrudes out of the limiting groove.

[0016] According to some embodiments of the present invention, at least two clamping heads are provided on the mounting portion, and the clamping heads are distributed along the circumference of the hub. The bayonet extends in a long strip shape, and the two ends of the bayonet are respectively clamped with the clamping heads.

[0017] According to some embodiments of the present invention, a first mounting hole is provided on the mounting portion, and a second mounting hole is provided on the blade. After the mounting portion and the insertion cavity are matched and plugged in, the first mounting hole and the second mounting hole are aligned and locked by passing a bolt through the first mounting hole and the second mounting hole.

[0018] The fan according to the second embodiment of the present invention includes a blade fixing structure.

[0019] The fan according to the embodiment of the present invention has at least the following beneficial effects: the cooperation between the clamp head and the bayonet restricts the centrifugal escape of the blade relative to the hub, and the cooperation between the limiting groove and the limiting rib ensures that the blade stably rotates circumferentially with the hub.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic diagram of the structural decomposition of the fan blade fixing structure;

[0023] Figure 2 yes Figure 1 Assembly diagram of

[0024] Figure 3 It is a schematic diagram of the structure of the wheel hub;

[0025] Figure 4 It is a schematic diagram of the structure of the blade;

[0026] Figure 5 yes Figure 2 A partial enlarged schematic diagram.

[0027] Reference numerals: hub 100 ; mounting portion 200 ; clamp 210 ; limiting rib 220 ; flat side 221 ; inclined side 222 ; first mounting hole 223 ; blade 300 ; insertion cavity 310 ; bayonet 311 ; limiting groove 312 ; second mounting hole 313 . DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The utility model relates to a fan blade fixing structure, which comprises a hub 100 and a plurality of blades 300.

[0030] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, multiple mounting portions 200 extend from the hub 100. The mounting portions 200 are sequentially distributed along the circumference of the hub 100. Preferably, the mounting portions 200 are evenly spaced along the circumferential wall of the hub 100. The shape of the mounting portions 200 is not limited and can be plate-shaped, cylindrical, wedge-shaped, etc. The mounting portions 200 are preferably integrally formed on the hub 100, or they can be fixed to the hub 100 by means of locking, welding, etc. The mounting portions 200 are provided with a clamping head 210 and a retaining rib 220. Each mounting portion 200 is connected to a corresponding blade 300. The end of the blade 300 connected to the hub 100 is provided with an insertion cavity 310. The insertion cavity 310 opens toward the hub 100. The shape of the insertion cavity 310 matches the shape of the mounting portion 200. The sidewalls of the insertion cavity 310 are provided with a latch 311 and a retaining groove 312. The latch 311 connects the insertion cavity 310 to the outside. The limiting groove 312 is also configured as a through groove. The limiting groove 312 extends linearly from one end of the insertion cavity 310. The insertion cavity 310 is connected to the outside through the limiting groove 312. The mounting portion 200 can be inserted into the insertion cavity 310. The clamping head 210 is matched with the bayonet 311 for engagement. The clamping head 210 is engaged with the bayonet 311. The clamping head 210 and the bayonet 311 cooperate to limit the radial position of the blade 300 in the hub 100, limiting the blade 300 from radially disengaging from the mounting portion 200 relative to the hub 100. The limiting rib 220 is arranged along the extension direction of the mounting portion 200. The limiting rib 220 is matched with the limiting groove 312. The limiting rib 220 and the limiting groove 312 abut against each other. The two cooperate to limit the blade 300 in the circumferential direction of the hub 100, limiting the blade 300 from deviating from the circumferential direction of the hub 100. When installing the blade 300, the limiting rib 220 and the limiting groove 312 also have a guiding effect on the docking of the insertion cavity 310 and the mounting portion 200. The fan blade fixing structure is used on an electric fan. The hub 100 is connected to the motor of the electric fan, and the motor drives the hub 100 and the blade 300 to rotate. The cooperation between the clamp 210 and the bayonet 311 limits the centrifugal disengagement of the blade 300 relative to the hub 100, and the cooperation between the limiting groove 312 and the limiting rib 220 ensures that the blade 300 stably rotates circumferentially with the hub 100. The overall structure is simple and easy to install. It can adapt to different blades 300. The cooperation between the clamp 210 and the bayonet 311 facilitates the rapid positioning and fixing of the blade 300 and the hub 100 in the radial direction. The cooperation between the limiting groove 312 and the limiting rib 220 facilitates the rapid positioning and fixing of the blade 300 and the hub 100 in the circumferential direction.

[0031] In this embodiment, Figure 3 As shown, the mounting portion 200 is plate-shaped and extends radially from the circumferential wall of the hub 100. The mounting portion 200 is tilted relative to the axial direction of the hub 100, and its tilt angle is determined by the tilt angle of the blades 300. The plate-shaped mounting portion 200 ensures structural strength of the blades 300 in the tangential direction of the hub 100.

[0032] In some specific embodiments of the present invention, Figure 3 As shown, at least two limiting ribs 220 are provided on the mounting portion 200. The number of the limiting ribs 220 can be two, three or more. The limiting ribs 220 are distributed along the circumference of the hub 100. In this embodiment, two limiting ribs 220 are provided on the mounting portion 200, and the limiting ribs 220 are distributed on positions close to both sides of the mounting portion 200. The clamp 210 can be provided between the two limiting ribs 220. Among them, the limiting member can protrude from the surface of the mounting portion 200. One end of the limiting rib 220 is connected to the circumferential wall of the hub 100, and one end of the limiting rib 220 can be directly molded on the circumferential wall of the hub 100, thereby increasing the structural strength of the mounting portion 200 in the axial direction of the hub 100.

[0033] In some specific embodiments of the present invention, Figure 3 As shown, in the direction shown in the figure, the limiting rib 220 protrudes vertically upward from the upper surface of the mounting portion 200 along the axial direction of the hub 100. The left and right sides of the limiting rib 220 are parallel plane sides 221. The plane side 221 is parallel to the axial direction of the hub 100, that is, the plane sides 221 on both sides are vertically arranged. The side (upper side) of the limiting rib 220 away from the mounting portion 200 is set as the inclined side 222. The inclined side 222 is inclined along the radial direction of the hub 100. The cross-section of the limiting rib 220 gradually expands from the end away from the hub 100 to the end close to the hub 100. That is, the cross-section of the end of the limiting rib 220 connected to the hub 100 is the largest, and the cross-section of the end of the limiting rib 220 away from the hub 100 is the smallest. The limiting rib 220 gradually shrinks outward along the radial direction of the hub 100 on the mounting portion 200. The two flat sides 221 on the limiting rib 220 abut against the two side walls of the limiting groove 312 to limit the position. At the same time, the limiting rib 220 is used to improve the structural strength of the mounting portion 200 in the axial direction of the hub 100. At the same time, the shape that gradually decreases along the radial direction of the hub 100 can reduce the deformation of the limiting rib 220 during molding. Figure 5 As shown, after the limiting rib 220 is inserted into the limiting groove 312 , at least a portion of the limiting rib 220 protrudes out of the limiting groove 312 .

[0034] In some embodiments of the present invention, Figure 3As shown, at least two clamps 210 are provided on the mounting portion 200, and the clamps 210 are distributed along the circumference of the hub 100. There may be two, three or more clamps 210 on the mounting portion 200. In this embodiment, two clamps 210 are provided. The axial cross-section of the clamp 210 is trapezoidal, which may be a right-angled trapezoid or a non-isosceles trapezoid, and the right-angled side or the side with a larger slope of the trapezoid abuts against the side wall of the bayonet 311. The bayonet 311 extends in a long strip shape, and the two clamps 210 are respectively clamped at the two ends of the bayonet 311. On the one hand, it can limit the radial position of the blade 300 in the hub 100, and also has a certain limiting effect on the blade 300 in the axial direction of the hub 100.

[0035] In some embodiments of the present invention, Figure 3 、 Figure 4 and Figure 5 As shown, the mounting portion 200 is provided with a first mounting hole 223, which can be passed through the insertion cavity 310. The blade 300 is provided with a second mounting hole 313. After the mounting portion 200 is inserted into the insertion cavity 310, the first mounting hole 223 and the second mounting hole 313 are coaxially aligned. Bolts are then passed through the first mounting hole 223 and the second mounting hole 313 to further secure the blade 300 to the mounting portion 200.

[0036] Throughout this specification, references to "some specific embodiments" and the like indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0037] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fan blade fixing structure, characterized in that: include: A wheel hub (100), wherein a plurality of mounting portions (200) extending from the wheel hub (100) and distributed sequentially along the circumferential direction, and a clamping head (210) and a limiting rib (220) are provided on the mounting portion (200); A plurality of blades (300) are provided, wherein an insertion cavity (310) is provided on the end of each blade (300), a bayonet (311) and a limiting groove (312) are provided on the side wall of the insertion cavity (310), the mounting portion (200) can be plugged into the insertion cavity (310) in a one-to-one matching manner, the clamping head (210) can be plugged into the bayonet (311) to limit the blade (300) from detaching from the mounting portion (200) along the radial direction of the hub (100), and the limiting rib (220) is plugged into the limiting groove (312) to limit the blade (300) from deviating in the circumferential direction of the hub (100).

2. The fan blade fixing structure according to claim 1, characterized in that: The mounting portion (200) is plate-shaped and extends from the peripheral wall of the hub (100) along the radial direction of the hub (100).

3. The fan blade fixing structure according to claim 2, characterized in that: The mounting portion (200) is inclined relative to the axial direction of the hub (100).

4. The fan blade fixing structure according to claim 1, characterized in that: At least two limiting ribs (220) are provided on the mounting portion (200), and each limiting rib (220) is distributed along the circumference of the hub (100).

5. The fan blade fixing structure according to claim 1 or 4, characterized in that: One end of the limiting rib (220) is connected to the peripheral wall of the hub (100).

6. The fan blade fixing structure according to claim 5, characterized in that: The limiting rib (220) protrudes from the surface of the mounting portion (200) along the axial direction of the wheel hub (100); the two sides of the limiting rib (220) are parallel plane sides (221) to each other; the plane sides (221) are parallel to the axial direction of the wheel hub (100); the side of the limiting rib (220) away from the mounting portion (200) is provided as an inclined side (222); and the cross section of the limiting rib (220) gradually expands from the end away from the wheel hub (100) to the end close to the wheel hub (100).

7. The fan blade fixing structure according to claim 6, characterized in that: At least a portion of the limiting rib (220) protrudes outside the limiting groove (312).

8. The fan blade fixing structure according to claim 1, characterized in that: At least two clamping heads (210) are provided on the mounting portion (200), and the clamping heads (210) are distributed along the circumference of the hub (100). The clamping port (311) extends in a long strip shape, and the clamping heads (210) are respectively clamped at both ends of the clamping port (311).

9. The fan blade fixing structure according to claim 1, characterized in that: The mounting portion (200) is provided with a first mounting hole (223), and the blade (300) is provided with a second mounting hole (313). After the mounting portion (200) and the insertion cavity (310) are mated and plugged, the first mounting hole (223) and the second mounting hole (313) are aligned and locked by passing a bolt through the first mounting hole (223) and the second mounting hole (313).

10. A fan, characterized in that: It comprises the fan blade fixing structure according to any one of claims 1 to 9.

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