Fan with compressive strength resistant structure

Abstract

The fan with the compressive strength resistant structure comprises a fan lower shell, a fan upper shell and fan blades, the fan upper shell is installed on the top of the fan lower shell, a copper pipe is arranged in the middle of the bottom end of the fan lower shell, a shaft core is installed in the middle of the copper pipe in an embedded mode, and a stator silicon steel sheet is installed on the outer wall of the copper pipe. A central column is integrally arranged in the middles of the fan blades, a ball bearing is mounted in the central column, an annular groove is formed in the position, located on the side face of the central column, of the bottom of each fan blade, a magnetic ring is mounted on the inner wall of the annular groove, and a soft rubber mat is mounted at the top end of the shaft core in a sleeved mode. Therefore, when a user touches and presses the fan upper shell, the fan upper shell can be pressed on the surface of the soft rubber mat due to deformation and cannot be in direct contact with the fan blades, so that abnormal sound caused by interference between the fan upper shell and the fan blades due to external force is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically relating to a fan with a structure that has strong compressive strength. Background Technology

[0002] Customers are increasingly demanding higher levels of comfort in their living environments, especially since cooling fans are installed in objects that come into direct contact with the human body, such as car seats, outdoor cooling hats, air-conditioned clothing, and handheld cooling fans. These fans are in constant contact with the body and are in constant motion, making them susceptible to external pressure, which can cause abnormal noises during operation. Currently, car manufacturers, seat manufacturers, and manufacturers of smart home devices and air-conditioned clothing that come into direct contact with the human body have specific requirements: "use a 40.0mm pressure bar with a pressure of ≥150N" to press the vulnerable middle part of the cooling fan, ensuring no abnormal noises during blade operation. Current fan designs on the market have the shaft formed on the blades; when powered on, the blades are constantly rotating, and the "shaft" also rotates with the blades. If external force presses on the fan housing, the housing will directly interfere with the rotating blade hub or blades, producing abnormal noises. Based on this, we propose a fan with high compressive strength to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a fan with a structure that has strong compressive strength, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fan with a pressure-resistant structure, comprising a lower fan housing, an upper fan housing, and fan blades. The upper fan housing is mounted on top of the lower fan housing. A copper tube is provided at the center of the top of the lower fan housing. A shaft core is embedded in the center of the copper tube. A stator silicon steel sheet is mounted on the outer wall of the copper tube. A central column is integrally provided in the center of the fan blade. A ball bearing is installed inside the central column. An annular groove is formed on the side of the central column at the bottom of the fan blade. A magnetic ring is installed on the inner wall of the annular groove. The central column is inserted into the copper tube, and the inner ring of the ball bearing is mounted on the shaft core. The stator silicon steel sheet is disposed in the annular groove. A PCBA board is mounted on the bottom of the stator silicon steel sheet by screws. A soft rubber pad is sleeved on the top of the shaft core.

[0005] As a preferred technical solution of this utility model, a limiting spacer ring is provided in the middle of the central column, and the ball bearings are embedded in the central column and closely attached to the limiting spacer ring. There are two ball bearings.

[0006] As a preferred technical solution of this utility model, a mounting groove is provided on the top surface of the shaft core, and a retaining ring is installed in the mounting groove.

[0007] As a preferred technical solution of this utility model, the top end of the shaft is provided with an angle, the bottom end of the soft rubber pad is integrally provided with a sleeve, and the top end of the shaft is inserted into the sleeve.

[0008] As a preferred technical solution of this utility model, a conical spring is provided at the bottom of the copper tube. The conical spring is sleeved on the outside of the shaft core and one end abuts against the ball bearing located at the bottom. The retaining ring is tightly attached to the ball bearing located at the top.

[0009] As a preferred technical solution of this utility model, the fan lower housing and the copper tube are integrally formed.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: Since the central column is inserted into the copper tube and the shaft passes through the central column, when the user touches and presses on the upper shell of the fan, the upper shell of the fan will deform and press on the surface of the soft rubber pad without directly contacting the fan blades, thereby avoiding the abnormal noise caused by interference between the upper shell of the fan and the fan blades due to external force. Moreover, the copper tube and the lower shell of the fan are integrally formed, which facilitates the subsequent assembly of the conical spring and the retaining spring to fix the fan blades, thus improving the assembly efficiency of the fan. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the fan blade structure in this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the lower housing of the fan in this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the soft rubber pad in this utility model.

[0016] In the diagram: 1. Fan lower housing; 2. Fan upper housing; 3. Fan blade; 4. Copper tube; 5. Shaft core; 6. Stator silicon steel sheet; 7. Center column; 8. Ball bearing; 9. Annular groove; 10. Magnetic ring; 11. PCBA board; 12. Soft rubber pad; 13. Limiting spacer ring; 14. Mounting groove; 15. Snap ring; 16. Angled; 17. Sleeve; 18. Conical spring. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1-4 The present invention provides the following technical solution: a fan with a structure that has strong compressive strength, including a fan lower shell 1, a fan upper shell 2 and fan blades 3. The fan upper shell 2 is installed on the top of the fan lower shell 1. A copper tube 4 is provided in the middle of the top of the fan lower shell 1. A shaft core 5 is embedded in the middle of the copper tube 4. A stator silicon steel sheet 6 is installed on the outer wall of the copper tube 4. A central column 7 is integrally provided in the middle of the fan blades 3. A ball bearing 8 is installed inside the central column 7. An annular groove 9 is opened on the side of the central column 7 at the bottom of the fan blades 3. A magnetic ring 10 is installed on the inner wall of the annular groove 9. The central column 7 is inserted into the copper tube 4 and the inner ring of the ball bearing 8 is installed on the shaft core 5. The stator silicon steel sheet 6 is set in the annular groove 9. A PCBA board 11 is installed on the bottom of the stator silicon steel sheet 6 by screws. A soft rubber pad 12 is sleeved on the top of the shaft core 5.

[0019] In this embodiment, a limiting spacer ring 13 is provided in the middle of the central column 7, and two ball bearings 8 are embedded in the central column 7 and closely attached to the limiting spacer ring 13.

[0020] Specifically, the limiting spacer 13 can separate the two ball bearings 8, and after the staff embeds the ball bearing 8 into the central column 7, the limiting spacer 13 makes it easy for the staff to know whether the ball bearing 8 is installed in place.

[0021] In this embodiment, a mounting groove 14 is provided on the top surface of the shaft core 5, a retaining ring 15 is installed in the mounting groove 14, an angled angle 16 is provided on the top of the shaft core 5, and a sleeve 17 is integrally provided on the bottom end of the soft rubber pad 12, and the top of the shaft core 5 is inserted into the sleeve 17.

[0022] Specifically, the angled 16 makes it easy for workers to snap the snap ring 15 into the mounting groove 14, and the angled 16 also makes it easy to insert the shaft core 5 into the insert sleeve 17. Furthermore, when the upper housing 2 of the fan is subjected to external force, the soft rubber pad 12 and the end of the shaft core 5 have a good fit.

[0023] In this embodiment, a conical spring 18 is provided at the bottom of the inner copper tube 4. The conical spring 18 is sleeved on the outside of the shaft core 5 and one end abuts against the ball bearing 8 located at the bottom. The retaining ring 15 is tightly attached to the ball bearing 8 located at the top.

[0024] Specifically, the conical spring 18 provides support for the ball bearing 8 at the bottom, and the cooperation between the conical spring 18 and the retaining ring 15 limits and fixes the two ball bearings 8, thereby limiting the position of the fan blade 3.

[0025] In this embodiment, the fan lower housing 1 and the copper tube 4 are integrally formed.

[0026] Specifically, since the copper tube 4 and the fan lower housing 1 are integrally formed, it is convenient to assemble the conical spring 18 and the retaining ring 15 later.

[0027] Working principle: When the fan is powered on through the PCBA board 11, the stator silicon steel sheet 6 and the magnetic ring 10 cause the fan blades 3 to start rotating. When the fan is subjected to external force, the upper shell 2 of the fan is squeezed downward and presses against the surface of the soft rubber pad 12. Since the soft rubber pad 12 does not contact the fan blades 3, the fan blades 3 will not interfere with the upper shell 2 due to external force and produce abnormal noise while rotating continuously. Moreover, the soft rubber pad 12 can also support the upper shell 2 of the fan, thereby improving the fan's pressure resistance and strength.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fan with a structure that resists pressure, comprising a lower fan housing (1), an upper fan housing (2), and fan blades (3), wherein the upper fan housing (2) is mounted on top of the lower fan housing (1), characterized in that: A copper tube (4) is provided at the bottom center of the fan lower housing (1). A shaft core (5) is embedded in the middle of the copper tube (4). A stator silicon steel sheet (6) is installed on the outer wall of the copper tube (4). A central column (7) is integrally provided in the middle of the fan blade (3). A ball bearing (8) is installed inside the central column (7). An annular groove (9) is opened on the side of the central column (7) at the bottom of the fan blade (3). A magnetic ring (10) is installed on the inner wall of the annular groove (9). The central column (7) is inserted into the copper tube (4) and the inner ring of the ball bearing (8) is installed on the shaft core (5). The stator silicon steel sheet (6) is set in the annular groove (9). A PCBA board (11) is installed at the bottom of the stator silicon steel sheet (6) by screws. A soft rubber pad (12) is sleeved on the top of the shaft core (5).

2. A fan with a pressure-resistant structure according to claim 1, characterized in that: A limiting spacer ring (13) is provided in the middle of the center column (7), and two ball bearings (8) are embedded in the center column (7) and closely attached to the limiting spacer ring (13).

3. A fan with a pressure-resistant structure according to claim 1, characterized in that: The top surface of the shaft core (5) is provided with a mounting groove (14), and a retaining ring (15) is installed in the mounting groove (14).

4. A fan with a pressure-resistant structure according to claim 1, characterized in that: The top end of the shaft core (5) is provided with an angle (16), and the bottom end of the soft rubber pad (12) is integrally provided with a sleeve (17), and the top end of the shaft core (5) is inserted into the sleeve (17).

5. A fan with a pressure-resistant structure according to claim 3, characterized in that: A conical spring (18) is provided at the bottom of the inner copper tube (4). The conical spring (18) is sleeved on the outside of the shaft core (5) and one end abuts against the ball bearing (8) located at the bottom. The snap ring (15) is in close contact with the ball bearing (8) located at the top.

6. A fan with a pressure-resistant structure according to claim 1, characterized in that: The fan lower housing (1) and the copper tube (4) are integrally formed.

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