Cooling fan structure

Abstract

The utility model relates to the technical field of cooling fans, in particular to a cooling fan structure which comprises a shell, a bottom frame is fixedly connected to one side of the shell, a center cylinder is fixedly connected to the middle of one side of the bottom frame, a rotor assembly is fixedly connected to the outer portion of the center cylinder, a fan base is rotationally connected to the outer portion of the rotor assembly, and fan blades are fixedly connected to the outer wall of the fan base. A central spindle is fixedly connected to the middle of the inner wall of the fan base and rotationally connected into the central cylinder, a bearing is sleeved with the position, located in the central cylinder, of the side wall of the central spindle, the bearing is clamped into the central cylinder, a spring is sleeved with the side wall of the central spindle, and the spring is located between the bearing and the inner wall of the fan base. The spring sleeves the shaft core and is supported between the inner wall of the fan seat and the bearing, when the shaft core rotates to cause vibration of the bearing, the bearing vibrates up and down to extrude the spring, the elastic potential energy of the spring is increased, and the spring prevents the bearing from vibrating up and down, so that the vibration amplitude of the bearing is reduced, and the serious abrasion of the bearing is reduced.

Description

Technical Field

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

[0002] The cooling fan converts electrical energy into electromagnetic energy, electromagnetic energy into mechanical energy, and mechanical energy into kinetic energy, thereby driving the fan blades to rotate. Its circuit principle is divided into many forms. The performance of the fan will vary depending on the circuit used.

[0003] Existing cooling fan structures, such as the cooling fan proposed in patent application number "CN202023287345.X", avoid friction loss caused by direct contact of the magnetic shaft core with the magnet through structures such as the magnetic shaft core, fan blade assembly, magnet, and bearing, and are also conducive to the smooth rotation of the magnetic shaft core.

[0004] In the prior art, for example, a cooling fan proposed in patent application number "CN202023287345.X", the shaft core of which rotates in the middle tube relying on a bearing. The shaft core will vibrate while rotating, driving the bearing to vibrate up and down, causing severe wear of the bearing and easily damaging the internal structure of the cooling fan. Therefore, a cooling fan structure is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a heat dissipation fan structure to solve the problems raised in the above background technology.

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

[0007] A heat dissipation fan structure comprises a shell, a bottom frame is fixedly connected to one side of the shell, a center tube is fixedly connected to the middle of one side of the bottom frame, a rotor assembly is fixedly connected to the outside of the center tube, a fan seat is rotatably connected to the outside of the rotor assembly, and a fan blade is fixedly connected to the outer wall of the fan seat;

[0008] A shaft core is fixedly connected to the middle of the inner wall of the fan seat, and the shaft core is rotatably connected to the center tube. A bearing is sleeved on the side wall of the shaft core located in the center tube. The bearing is clamped in the center tube. A spring is sleeved on the side wall of the shaft core, and the spring is located between the bearing and the inner wall of the fan seat.

[0009] Preferably, the rotor assembly includes a magnetic core, which is fixed to the outer wall of the center tube, with side fixing plates fixed to both ends of the magnetic core, two groups of side fixing plates are sleeved on the center tube, a magnetic sleeve is fixed to the inner wall of the fan seat, a magnetic ring is fixed to the inner wall of the magnetic sleeve, and the magnetic ring cooperates with the magnetic core.

[0010] Preferably, the inner wall of the central tube is rotatably connected to the limiting block, the shaft core passes through the limiting block, the side wall of the shaft core is clamped with a buckle, and the buckle is clamped and matched with one end of the limiting block moved away from the bearing.

[0011] Preferably, the side wall of the central tube is fixedly connected to a PCB board, and a plurality of needle seats are fixedly connected to the side fixing plate close to the bottom frame, and the plurality of needle seats are all connected to steel needles, and the plurality of steel needles are all connected to the PCB board.

[0012] Preferably, a fixing ring is clamped on the outer wall of the central tube, and the fixing ring is clamped and matched with the magnetic core.

[0013] Preferably, both ends of the shell are fixedly connected with mounting frames, and a plurality of groups of fixing columns are fixedly connected between the two groups of mounting frames.

[0014] Beneficial effects of the utility model:

[0015] The utility model arranges a spring on the shaft core, and the spring is supported between the inner wall of the fan seat and the bearing. One end of the bearing is clamped with the inner wall of the center tube and can only rotate but not slide, and the other end is abutted by the spring. When the shaft core rotates to cause the bearing to vibrate, the up and down vibration of the bearing will squeeze the spring, increasing the elastic potential energy of the spring. The spring prevents the bearing from vibrating up and down, thereby reducing the vibration amplitude of the bearing and reducing the severity of bearing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a schematic diagram of the overall front structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall back structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the rotor assembly of the utility model;

[0020] Figure 4 It is a schematic diagram of the overall explosion structure of the utility model;

[0021] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the utility model;

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

[0023] 1. Outer shell; 2. Bottom frame; 3. Fan seat; 4. Fan blade; 5. Mounting frame; 6. Fixed column; 7. Center tube; 8. Axis core; 9. Limit block; 10. Buckle; 11. Bearing; 12. Spring; 13. Magnetic sleeve; 14. Magnetic ring; 15. Side fixing plate; 16. Magnetic core; 17. Needle seat; 18. Steel needle; 19. Fixed ring; 20. PCB board. 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 heat dissipation fan structure, such as Figure 1-Figure 5 As shown, it comprises a shell 1, a bottom frame 2 is fixedly connected to one side of the shell 1, a center tube 7 is fixedly connected to the middle of one side of the bottom frame 2, a rotor assembly is fixedly connected to the outside of the center tube 7, a fan seat 3 is rotatably connected to the outside of the rotor assembly, and a fan blade 4 is fixedly connected to the outer wall of the fan seat 3;

[0026] A shaft core 8 is fixedly connected to the middle of the inner wall of the fan seat 3, and the shaft core 8 is rotatably connected to the center tube 7. A bearing 11 is sleeved on the side wall of the shaft core 8 located in the center tube 7. The bearing 11 is clamped in the center tube 7. A spring 12 is sleeved on the side wall of the shaft core 8, and the spring 12 is located between the bearing 11 and the inner wall of the fan seat 3.

[0027] By rotating the blades 4 in the housing 1, the rotor assembly converts electrical energy into electromagnetic energy, and the electromagnetic energy drives the fan seat 3 to rotate, thereby rotating the blades 4. The shaft core 8 in the middle of the fan seat 3 rotates in the center tube 7 by means of the bearing 11, so that the fan seat 3 remains stable when rotating. By sleeved a spring 12 on the shaft core 8, the spring 12 is supported between the inner wall of the fan seat 3 and the bearing 11. When the shaft core 8 rotates and causes the bearing 11 to vibrate, one end of the bearing 11 is clamped with the inner wall of the center tube 7 and can only rotate but not slide, and the other end is abutted by the spring 12. When the shaft core 8 rotates and causes the bearing 11 to vibrate, the up and down vibration of the bearing 11 will squeeze the spring 12, thereby increasing the elastic potential energy of the spring 12. The spring 12 prevents the bearing 11 from vibrating up and down, thereby reducing the vibration amplitude of the bearing 11 and reducing the serious wear of the bearing 11.

[0028] The rotor assembly includes a magnetic core 16, which is fixed to the outer wall of the center tube 7. Side fixing plates 15 are fixed to both ends of the magnetic core 16. Two groups of side fixing plates 15 are sleeved on the center tube 7. A magnetic sleeve 13 is fixed to the inner wall of the fan seat 3. A magnetic ring 14 is fixed to the inner wall of the magnetic sleeve 13. The magnetic ring 14 cooperates with the magnetic core 16.

[0029] like Figure 3-Figure 5 As shown, when the magnetic core 16 is energized, a magnetic field is generated to drive the magnetic ring 14 to rotate. The magnetic ring 14 drives the fan seat 3 to rotate through the magnetic sleeve 13, thereby making the cooling fan run.

[0030] The inner wall of the central tube 7 is rotatably connected to the limit block 9, the shaft core 8 passes through the limit block 9, and the side wall of the shaft core 8 is clamped with a buckle 10, which is clamped and matched with one end of the limit block 9 moved away from the bearing 11.

[0031] like Figure 3-Figure 5 As shown, the limit block 9 cooperates with the buckle 10 to prevent the shaft core 8 from separating from the central tube 7 and to keep the shaft core 8 rotating stably.

[0032] The side wall of the central tube 7 is fixedly connected with a PCB board 20 , and the side fixing plate close to the bottom frame 2 is fixedly connected with multiple sets of needle seats 17 , each of which is plugged with steel needles 18 , and each of which is plugged with the PCB board 20 .

[0033] like Figure 4-5 As shown, the PCB board 20 is used to control the operation of the cooling fan, the steel needle 18 is connected to the external power supply, connected to the PCB board 20, and energizes the magnetic core 16.

[0034] The outer wall of the central tube 7 is clamped with a fixing ring 19 , and the fixing ring 19 is clamped and matched with the magnetic core 16 .

[0035] like Figure 5 As shown, the fixing ring 19 constrains the magnetic core 16 to prevent the magnetic core 16 from shaking.

[0036] Both ends of the housing 1 are fixedly connected to mounting frames 5 , and multiple groups of fixing columns 6 are fixedly connected between two groups of mounting frames 5 .

[0037] like Figure 1 As shown, the mounting frame 5 and the fixing column 6 facilitate fixing the cooling fan with bolts.

[0038] The working principle of a heat dissipation fan structure provided by the utility model is as follows:

[0039] The electrical energy is converted into electromagnetic energy through the rotor assembly, and the electromagnetic energy drives the fan seat 3 to rotate, thereby rotating the fan blades 4. The shaft core 8 in the middle of the fan seat 3 rotates in the center tube 7 by means of the bearing 11, so that the fan seat 3 remains stable when rotating. A spring 12 is sleeved on the shaft core 8, and the spring 12 is supported between the inner wall of the fan seat 3 and the bearing 11. When the shaft core 8 rotates and causes the bearing 11 to vibrate, one end of the bearing 11 is clamped with the inner wall of the center tube 7 and can only rotate but not slide, and the other end is abutted by the spring 12. When the shaft core 8 rotates and causes the bearing 11 to vibrate, the up and down vibration of the bearing 11 will squeeze the spring 12, thereby increasing the elastic potential energy of the spring 12. The spring 12 prevents the bearing 11 from vibrating up and down, thereby reducing the vibration amplitude of the bearing 11 and reducing the serious wear of the bearing 11.

[0040] 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 heat dissipation fan structure, comprising a housing (1), characterized in that: The housing (1) is fixedly connected to a bottom frame (2) on one side, a center tube (7) is fixedly connected to the middle of one side of the bottom frame (2), a rotor assembly is fixedly connected to the outside of the center tube (7), a fan seat (3) is rotatably connected to the outside of the rotor assembly, and a fan blade (4) is fixedly connected to the outer wall of the fan seat (3); A shaft core (8) is fixedly connected to the middle of the inner wall of the fan seat (3), and the shaft core (8) is rotatably connected to the center tube (7). A bearing (11) is sleeved on the side wall of the shaft core (8) located in the center tube (7), and the bearing (11) is clamped in the center tube (7). A spring (12) is sleeved on the side wall of the shaft core (8), and the spring (12) is located between the bearing (11) and the inner wall of the fan seat (3).

2. A heat dissipation fan structure according to claim 1, characterized in that: The rotor assembly comprises a magnetic core (16), the magnetic core (16) is fixedly connected to the outer wall of the center tube (7), both ends of the magnetic core (16) are fixedly connected to side fixing plates (15), two groups of side fixing plates (15) are sleeved on the center tube (7), the inner wall of the fan seat (3) is fixedly connected to a magnetic sleeve (13), the inner wall of the magnetic sleeve (13) is fixedly connected to a magnetic ring (14), and the magnetic ring (14) cooperates with the magnetic core (16).

3. The heat dissipation fan structure according to claim 1, characterized in that: The inner wall of the central tube (7) is rotatably connected to a limit block (9), the shaft core (8) passes through the limit block (9), a buckle (10) is clamped on the side wall of the shaft core (8), and the buckle (10) is clamped and matched with one end of the limit block (9) that is separated from the bearing (11).

4. The heat dissipation fan structure according to claim 2, characterized in that: The side wall of the central tube (7) is fixedly connected to a PCB board (20), and a plurality of needle seats (17) are fixedly connected to a side fixing plate close to the bottom frame (2), and the plurality of needle seats (17) are all plugged with steel needles (18), and the plurality of steel needles (18) are all plugged into the PCB board (20).

5. The heat dissipation fan structure according to claim 2, characterized in that: The outer wall of the central tube (7) is clamped with a fixing ring (19), and the fixing ring (19) is clamped and matched with the magnetic core (16).

6. The heat dissipation fan structure according to claim 1, characterized in that: Both ends of the housing (1) are fixedly connected to mounting frames (5), and a plurality of sets of fixing columns (6) are fixedly connected between the two sets of mounting frames (5).

Images