Fan blade anti-loosening structure of cooling fan

Abstract

The utility model relates to the technical field of cooling fans, in particular to a fan blade anti-loosening structure of a cooling fan, which comprises a lower shell, an upper shell is fixedly connected to the upper end of the lower shell, a fan seat is rotatably connected to one side, positioned inside the upper shell, of the lower shell, and a plurality of groups of fan blades are fixedly connected to the outside of the fan seat. A rotor assembly is fixedly connected to the side, located in the fan base, of the lower shell and matched with the fan base, and an ejector pin is fixedly connected to the side, away from the lower shell, of the upper shell and matched with the top end of the fan base. The ejector pin is fixedly connected into the upper shell, the lower shell is matched with the ejector pin, the ejector pin abuts against the fan base all the time, the shaft core cannot loosen, the fan blades are prevented from loosing, the ejector pin is used for replacing a buckle, the ejector pin does not need to be additionally assembled, the buckle does not need to be additionally removed, the assembling steps are simplified, and the assembling efficiency of the cooling fan is improved.

Description

Technical Field

[0001] The utility model relates to the field of heat dissipation fans, in particular to a fan blade anti-loosening structure of a heat dissipation fan. Background Art

[0002] The working principle of the cooling fan is based on energy conversion, which is achieved by converting electrical energy into electromagnetic energy, electromagnetic energy into mechanical energy, and mechanical energy into kinetic energy. The fan blades are divided into axial flow fans, centrifugal fans and other types. They are installed inside electronic equipment to improve the heat dissipation performance inside the electronic equipment. The blades in the cooling fan need to remain in place and continue to rotate to avoid the blades scratching the fan casing and causing damage.

[0003] The fan blade anti-loosening structure of the existing cooling fan, such as the cooling fan rotor buckle and cooling fan proposed in patent application number "CN201821456042.6", prevents the shaft core from being pulled out of the buckle through structures such as the shaft core, shaft seat, buckle, and bearing. The buckle prevents the shaft core from causing the fan blades to loosen.

[0004] In the prior art, for example, the rotor clip of the cooling fan and the cooling fan proposed in patent application number "CN201821456042.6" use the clip to prevent the fan blades from loosening due to the shaft core. When assembling the fan, the clip needs to be installed correctly. There are many assembly steps and the installation is relatively complicated. Therefore, a cooling fan blade anti-loosening structure is proposed. Utility Model Content

[0005] The utility model aims to provide a fan blade anti-loosening structure for a heat dissipation fan to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A blade anti-loosening structure for a cooling fan comprises a lower shell, wherein the upper end of the lower shell is fixedly connected to an upper shell, a side of the lower shell located inside the upper shell is rotatably connected to a fan seat, a plurality of groups of fan blades are fixedly connected to the outside of the fan seat, a side of the lower shell located inside the fan seat is fixedly connected to a rotor assembly, the rotor assembly cooperates with the fan seat, a side of the upper shell away from the lower shell is fixedly connected to a ejector pin, and the ejector pin cooperates with the top end of the fan seat.

[0008] Preferably, a center tube is fixedly connected to one end of the upper shell away from the lower shell, the center tube is aligned with the axis of the fan seat, a cross bar is fixedly connected inside the center tube, and the ejector pin is fixedly connected to the middle part of one side of the cross bar close to the lower shell.

[0009] Preferably, the end of the ejector pin is arranged in a rounded state, a groove is provided in the middle of the top end of the fan seat, and the end of the ejector pin is abutted and matched with the groove.

[0010] Preferably, an axis core is fixedly connected to the middle of the inner wall of the fan seat, a mounting cavity is opened in the middle of one side of the lower shell located in the fan seat, the end of the axis core is rotatably connected in the mounting cavity, and multiple groups of reinforcing ribs are fixedly connected between the inner wall of the fan seat and the side wall of the axis core, and the multiple groups of reinforcing ribs are arranged in a circular array.

[0011] Preferably, a wear-resistant sheet is fixedly connected to the inner wall of the installation cavity, and one end of the shaft core located in the installation cavity is in abutment with the wear-resistant sheet.

[0012] Preferably, the side wall of the upper shell is provided with two groups of side openings, which are symmetrically located on both sides of the upper shell, and a fixing plate is fixedly connected to one end of the side wall of the upper shell away from the lower shell, and a slot is provided on the fixing plate.

[0013] Beneficial effects of the utility model:

[0014] The utility model is fixed in the upper shell by the ejector pin, and the lower shell and the ejector pin cooperate. The ejector pin always abuts against the fan seat, so that the shaft core will not loosen, thereby preventing the fan blades from loosening. The ejector pin is used to replace the buckle, and there is no need to assemble the ejector pin additionally. The buckle is removed, the assembly steps are simplified, and the assembly efficiency of the cooling fan is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall explosion structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the upper shell structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the fan structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0021] Figure 6 This is a schematic diagram of the internal structure of the fan seat of the utility model;

[0022] The reference numerals in the figures are as follows:

[0023] 1. Upper shell; 2. Fan seat; 3. Shaft core; 4. Installation cavity; 5. Wear-resistant plate; 6. Lower shell; 7. Fan blade; 8. Rotor assembly; 9. Center tube; 10. Cross bar; 11. Ejector pin; 12. Groove; 13. Reinforcement rib; 14. Side opening; 15. Fixing plate; 16. Notch. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A blade anti-loosening structure of a cooling fan comprises a lower shell 6, wherein the upper end of the lower shell 6 is fixedly connected to an upper shell 1, a side of the lower shell 6 located inside the upper shell 1 is rotatably connected to a fan seat 2, a plurality of groups of fan blades 7 are fixedly connected to the outside of the fan seat 2, a side of the lower shell 6 located inside the fan seat 2 is fixedly connected to a rotor assembly 8, the rotor assembly 8 cooperates with the fan seat 2, a side of the upper shell 1 away from the lower shell 6 is fixedly connected to an ejector pin 11, and the ejector pin 11 cooperates with the top end of the fan seat 2.

[0026] like Figure 1-Figure 6 As shown, the upper shell 1 and the lower shell 6 are combined to form an integral shell, and the rotor assembly 8 and the fan blades 7 of the cooling fan are located between the upper shell 1 and the lower shell 6. The rotor assembly 8 drives the fan seat 2 to rotate, and the fan blades 7 are fixed to the outside of the fan seat 2. One end of the fan seat 2 is rotatably connected to the lower shell 6, and the top end abuts against the ejector pin 11 in the upper shell 1, and the ejector pin 11 is opposite to the top center of the fan seat 2. The ejector pin 11 is fixed in the upper shell 1, and the lower shell 6 and the ejector pin 11 cooperate. The ejector pin 11 always abuts against the fan seat 2, so that the shaft core 3 will not loosen, thereby preventing the fan blades 7 from loosening. The ejector pin 11 is used to replace the buckle, and there is no need to assemble the ejector pin 11 additionally. The buckle is removed, the assembly steps are simplified, and the assembly efficiency of the cooling fan is improved.

[0027] A center tube 9 is fixedly connected to one end of the upper shell 1 away from the lower shell 6 . The center tube 9 is aligned with the axis of the fan seat 2 . A cross bar 10 is fixedly connected inside the center tube 9 . The ejector pin 11 is fixedly connected to the middle part of the cross bar 10 near the lower shell 6 .

[0028] like Figure 3 As shown, the central tube 9 facilitates the air circulation fanned by the fan blades 7, and the cross bar 10 makes the top rod face the middle of the top of the fan seat 2, so that the top rod does not need additional assembly, and the top rod is integrated with the upper shell 1. The top pin 11 is made of plastic material.

[0029] The end of the ejector pin 11 is arranged in a rounded state, and a groove 12 is provided in the middle of the top end of the fan seat 2 , and the end of the ejector pin 11 abuts against the groove 12 .

[0030] like Figure 5 As shown, the end of the ejector pin 11 is rounded to prevent the ejector pin 11 from causing damage to the fan seat 2, so that the end of the ejector pin 11 abuts against the groove 12 of the fan seat 2, so that the ejector pin 11 fixes the center of the fan seat 2 to prevent the fan blade 7 from loosening.

[0031] An axis core 3 is fixedly connected to the middle of the inner wall of the fan seat 2, and an installation cavity 4 is opened in the middle of one side of the lower shell 6 located in the fan seat 2. The end of the axis core 3 is rotatably connected in the installation cavity 4, and multiple groups of reinforcing ribs 13 are fixedly connected between the inner wall of the fan seat 2 and the side wall of the axis core 3, and the multiple groups of reinforcing ribs 13 are arranged in a circular array.

[0032] like Figure 5-Figure 6 As shown, the shaft core 3 is inserted into the installation cavity 4 to stabilize the rotation center of the fan seat 2 and avoid center deviation when the shaft core 3 and the lower shell 6 rotate. The reinforcing ribs 13 increase the structural stability between the shaft core 3 and the fan seat 2 and prevent damage between the shaft core 3 and the fan seat 2.

[0033] A wear-resistant sheet 5 is fixedly connected to the inner wall of the installation cavity 4 , and one end of the shaft core 3 located in the installation cavity 4 is in abutment with the wear-resistant sheet 5 .

[0034] like Figure 5 As shown, the wear-resistant sheet 5 prevents the shaft core 3 from rotating and causing damage to the lower shell 6.

[0035] The side wall of the upper shell 1 is provided with two groups of side openings 14 symmetrically located on both sides of the upper shell 1 . A fixing plate 15 is fixedly connected to one end of the side wall of the upper shell 1 away from the lower shell 6 , and a notch 16 is provided on the fixing plate 15 .

[0036] like Figure 1-Figure 3 As shown, the side opening 14 facilitates air flow between the upper shell 1 and the lower shell 6, and the fixing plate 15 and the notch 16 facilitate installation and fixing of the heat dissipation fan.

[0037] The working principle of the fan blade anti-loosening structure of a heat dissipation fan provided by the utility model is as follows:

[0038] The fan blade 7 is fixed to the outside of the fan seat 2, and one end of the fan seat 2 is rotatably connected to the lower shell 6. The top end abuts against the ejector pin 11 in the upper shell 1, and the ejector pin 11 is opposite to the center of the top end of the fan seat 2. The ejector pin 11 is fixed in the upper shell 1, and the lower shell 6 and the ejector pin 11 cooperate. The ejector pin 11 always abuts against the fan seat 2 to prevent the shaft core 3 from loosening, thereby preventing the fan blade 7 from loosening. The ejector pin 11 is used to replace the buckle, and there is no need to assemble the ejector pin 11 additionally. The buckle is removed, the assembly steps are simplified, and the assembly efficiency of the cooling fan is improved.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A fan blade anti-loosening structure of a heat dissipation fan, comprising a lower shell (6), characterized in that: The upper end of the lower shell (6) is fixedly connected to the upper shell (1); the side of the lower shell (6) located inside the upper shell (1) is rotatably connected to the fan seat (2); the outside of the fan seat (2) is fixedly connected to a plurality of fan blades (7); the side of the lower shell (6) located inside the fan seat (2) is fixedly connected to a rotor assembly (8); the rotor assembly (8) cooperates with the fan seat (2); the side of the upper shell (1) away from the lower shell (6) is fixedly connected to an ejector pin (11); the ejector pin (11) cooperates with the top end of the fan seat (2).

2. The anti-loosening structure of a fan blade of a heat dissipation fan according to claim 1, characterized in that: A center tube (9) is fixedly connected to one end of the upper shell (1) away from the lower shell (6), the center tube (9) is aligned with the axis of the fan seat (2), a cross bar (10) is fixedly connected inside the center tube (9), and a ejector pin (11) is fixedly connected to the middle part of one side of the cross bar (10) close to the lower shell (6).

3. The anti-loosening structure of a fan blade of a heat dissipation fan according to claim 2, characterized in that: The end of the ejector pin (11) is arranged in a rounded state, a groove (12) is provided in the middle of the top end of the fan seat (2), and the end of the ejector pin (11) is in abutment with the groove (12).

4. The anti-loosening structure of a fan blade of a heat dissipation fan according to claim 1, characterized in that: The fan seat (2) has an inner wall with an axis core (3) fixedly connected in the middle thereof; a lower shell (6) is provided with an installation cavity (4) in the middle of one side thereof located in the fan seat (2); an end of the axis core (3) is rotatably connected in the installation cavity (4); and a plurality of groups of reinforcing ribs (13) are fixedly connected between the inner wall of the fan seat (2) and the side wall of the axis core (3); the plurality of groups of reinforcing ribs (13) are arranged in a circular array.

5. The anti-loosening structure of the fan blades of the heat dissipation fan according to claim 4, characterized in that: A wear-resistant sheet (5) is fixedly connected to the inner wall of the installation cavity (4), and one end of the shaft core (3) located in the installation cavity (4) is in abutment with the wear-resistant sheet (5).

6. The anti-loosening structure of a fan blade of a heat dissipation fan according to claim 1, characterized in that: The side wall of the upper shell (1) is provided with two groups of side openings (14), which are symmetrically located on both sides of the upper shell (1). A fixing plate (15) is fixedly connected to one end of the side wall of the upper shell (1) away from the lower shell (6), and a notch (16) is provided on the fixing plate (15).

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