Direct-current brushless volute fan

Abstract

The utility model discloses a direct current brushless volute fan which comprises a volute assembly and a motor assembly fixed on the surface of the volute assembly, the volute assembly comprises an upper volute, a lower volute and a volute fan arranged in the upper volute, and a volute end cover used for fixing the motor assembly is arranged on the surface of the lower volute. A fixed end plate and a rubber gasket are further arranged between the volute end cover and the lower volute, the rubber gasket, the fixed end plate and the volute end cover are fixed to the lower volute through a first long screw, and the output end of the motor assembly penetrates through the volute end cover, extends into the volute assembly and is fixedly connected with the volute fan. The motor assembly and the volute assembly are connected in a split mode, so that disassembly or installation is simple, the utilization rate of products is greatly improved, and maintenance is convenient. And secondly, the motor assembly is installed on the surface of the volute, friction of internal parts is reduced, the wind power of the direct-current brushless fan is further improved, and the stability of the volute can be improved through shock absorption of a rubber gasket.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a direct current brushless volute fan. Background Art

[0002] The fan is an electromechanical product that uses the shaft of a brushless DC motor to drive the fan blades installed on the shaft to rotate, sucking air from the air inlet pipe of the air cover to form a directional air outlet. Since the brushless DC fan has a series of advantages of AC fans such as simple structure, reliable operation and easy maintenance, it is widely used in the ventilation and heat dissipation fields of electronic equipment.

[0003] However, as the size of existing brushless DC fans tends to be smaller and smaller, the motor is installed inside the volute, making the installation of the internal structure of the fan more and more compact. The compact installation structure inside the fan has the following disadvantages: 1. It is too tight, making installation or disassembly difficult and not conducive to maintenance; 2. The motor shaft is easily deformed during installation, and the fan has poor stability; 3. The suction force is insufficient and the wind force is insufficient. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a DC brushless volute fan to solve the above problems.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A DC brushless volute fan comprises a volute assembly and a motor assembly fixed on the surface of the volute assembly, the volute assembly comprising an upper volute, a lower volute and a volute fan arranged in the upper volute, the surface of the lower volute is provided with a volute end cover for fixing the motor assembly, a fixed end plate and a rubber gasket are also provided between the volute end cover and the lower volute, the rubber gasket, the fixed end plate and the volute end cover are fixed on the lower volute by a long screw, the motor assembly is fixed on the surface of the volute end cover, and the output end of the motor assembly extends through the volute end cover into the volute assembly and is fixedly connected to the volute fan.

[0007] In the above utility model, further, the upper volute and the lower volute are fixedly connected by hexagonal screws.

[0008] In the above utility model, further, a rubber cylinder is sleeved on the long screw, and the long screw passes through the volute end cover, the fixed end plate, the rubber gasket and the mounting hole on the lower volute from bottom to top in sequence and fixes the volute end cover on the lower volute.

[0009] In the above utility model, further, the motor assembly includes a motor end cover and a rotor assembly arranged in the motor end cover, a stator core, a neodymium iron boron magnet, and ball bearings 1 and 2 that are interference fit on the rotor assembly. The neodymium iron boron magnet is glued and fixed on the rotor assembly, and a magnetic steel sheath is interference fit on the outside of the neodymium iron boron magnet. The driving end of the rotor assembly passes through the motor end cover, the volute end cover, and the through holes on the lower volute, and is connected to the volute fan in the upper volute and fixed by a hexagonal nut. A cooling fan is also provided in the volute end cover, and the cooling fan is fixed on the rotor assembly by interference fit.

[0010] In the above utility model, further, the motor end cover includes an upper end cover and a lower end cover, the upper end cover and the lower end cover are fixedly connected by two long screws, and the stator core, the upper end cover, the lower end cover and the rotor assembly are locked together by the two long screws.

[0011] In the above utility model, further, the motor assembly also includes a wave spring washer and a steel washer, and the wave spring washer and the steel washer are respectively fixed inside the upper end cover and the lower end cover of the motor assembly by means of clearance fit.

[0012] In the above utility model, further, the upper end cover and the volute end cover are fixedly connected by short screws.

[0013] The beneficial effects of the utility model are:

[0014] The motor assembly and volute assembly of the utility model adopt a split connection, which makes disassembly or installation simple, greatly improves the utilization rate of the product, facilitates maintenance, and also further accelerates production efficiency; secondly, the motor assembly is installed on the surface of the volute to reduce the friction of internal parts, further improves the wind force of the DC brushless fan, and the stability of the volute can be improved by shock absorption of the rubber gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is the explosion of the utility model.

[0017] In the figure, 1-upper volute, 2-hexagonal nut, 3-volute fan, 4-lower volute, 5-hexagonal screw, 6-rubber gasket, 7-fixed end plate, 8-rubber cylinder, 9-cooling fan, 10-volute end cover, 11-long screw one, 12-upper end cover, 13-long screw two, 14-short screw, 15-wave spring washer, 16-ball bearing 1, 17-rotor assembly, 18-NdFeB magnet, 19-magnetic steel sheath, 20-stator core, 21-ball bearing 2, 22-steel gasket, 23-lower end cover. DETAILED DESCRIPTION

[0018] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0019] Please see attached Figure 1 and attached Figure 2 As shown, a DC brushless volute fan includes a volute assembly and a motor assembly fixed on the surface of the volute assembly, so that the volute assembly and the motor assembly of the fan in this embodiment are connected in a split type, which is convenient for installation and improves production efficiency. The two can also be disassembled separately for maintenance;

[0020] The volute assembly includes an upper volute 1, a lower volute 4, and a volute fan 3 disposed in the upper volute 1. The upper volute 1 and the lower volute 4 are fixedly connected by hexagonal screws 5 and constitute the volute of the volute fan in this embodiment. The volute fan 3 is also installed in the volute by the hexagonal screws 5, and the volute fan 3 provides kinetic energy.

[0021] The surface of the lower volute 4 is provided with a volute end cover 10 for fixing the motor assembly. A fixed end plate 7 and a rubber gasket 6 are also provided between the volute end cover 10 and the lower volute 4. The fixed end plate 7 and the rubber gasket 6 can reduce the vibration caused by the rotation of the motor assembly and improve the stability of the volute assembly. The rubber gasket 6, the fixed end plate 7 and the volute end cover 10 are fixed to the lower volute 4 by a long screw 11. The long screw 11 is a long cross screw.

[0022] The motor assembly is fixed on the surface of the volute end cover 10, and the output end of the motor assembly extends through the volute end cover 10 into the volute assembly and is fixedly connected to the volute fan 3, and the volute fan 3 is driven to rotate by the motor assembly.

[0023] The long screw 11 is sleeved with a rubber cylinder 8, and the rubber cylinder 8 is installed on the volute end cover 10 with an interference fit. The long screw 11 passes through the rubber cylinder 8 on the volute end cover 10, the fixed end plate 7, the rubber gasket 6 and the mounting hole (not shown in the figure) on the lower volute 4 from bottom to top, and then fixes the volute end cover 10 on the lower volute 4. The rubber cylinder 8 can also play a shock-absorbing role, further improving the stability of the volute assembly.

[0024] As attached Figure 2As shown, the motor assembly includes a motor end cover and a rotor assembly 17 disposed in the motor end cover, a stator core 20, a neodymium iron boron magnet 18, and a ball bearing 1 and a ball bearing 2 which are interference fit on the rotor assembly 17. The rotor assembly 17 is a common combination of a motor shaft core and a rotor, which will not be described in detail in this embodiment; the ball bearing 1 and the ball bearing 2 are used for the rotation of the shaft core in the rotor assembly 17;

[0025] The NdFeB magnet 18 is fixed to the rotor assembly 17 by gluing, and the NdFeB magnet 18 is interference-fitted with a magnetic steel sheath 19. The rotor assembly 17, the NdFeB magnet and the magnetic steel sheath 19 constitute a rotating device in the DC brushless fan in this embodiment, providing power for the fan to rotate; specifically, the driving end of the rotor assembly 17 passes through the motor end cover, the volute end cover 10 and the through hole on the lower volute 4 (not shown in the figure) and is connected to the volute fan 3 in the upper volute 1 and fixed by the hexagonal nut 2, thereby driving the volute fan 3 to rotate;

[0026] A cooling fan 9 is also provided in the volute end cover 10. The cooling fan 9 is fixed on the rotor assembly 17 by interference fit. When the rotor assembly 17 rotates, the cooling fan 9 is also driven to rotate together to dissipate heat for the motor assembly in this embodiment.

[0027] Furthermore, the motor end cover includes an upper end cover 12 and a lower end cover 23, and the rotor assembly 17, the stator core 20, the neodymium iron boron magnet 18, the ball bearing one and the ball bearing two are all arranged between the upper end cover 12 and the lower end cover 23. The upper end cover 12 and the lower end cover 23 are fixedly connected by the long screw two 13, and the stator core 20, the upper end cover 12, the lower end cover 23 and the rotor assembly 17 are locked together by the long screw two 13 to improve the stability of the motor assembly.

[0028] When the motor assembly is fixed on the surface of the volute end cover 10 , the upper end cover 12 contacts the surface of the volute end cover 10 , and the upper end cover 12 and the volute end cover 10 are fixedly connected by short cross screws 14 .

[0029] In the above embodiment, preferably, the motor assembly further includes a wave spring washer 15 and a steel washer 22, and the wave spring washer 15 and the steel washer 22 are respectively fixed inside the upper end cover 12 and the lower end cover 23 of the motor assembly by means of clearance fit.

[0030] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A DC brushless volute fan, characterized in that: The invention comprises a volute assembly and a motor assembly fixed on the surface of the volute assembly, wherein the volute assembly comprises an upper volute (1), a lower volute (4) and a volute fan (3) arranged in the upper volute (1), the surface of the lower volute (4) is provided with a volute end cover (10) for fixing the motor assembly, a fixed end plate (7) and a rubber gasket (6) are also provided between the volute end cover (10) and the lower volute (4), the rubber gasket (6), the fixed end plate (7) and the volute end cover (10) are fixed on the lower volute (4) by a long screw (11), the motor assembly is fixed on the surface of the volute end cover (10), and the output end of the motor assembly passes through the volute end cover (10) and extends into the volute assembly and is fixedly connected to the volute fan (3).

2. A DC brushless volute fan according to claim 1, characterized in that: The upper volute (1) and the lower volute (4) are fixedly connected by means of hexagonal screws (5).

3. A DC brushless volute fan according to claim 1, characterized in that: The long screw (11) is sleeved with a rubber cylinder (8), and the long screw (11) passes through the volute end cover (10), the fixed end plate (7), the rubber gasket (6) and the mounting hole on the lower volute (4) from bottom to top in sequence to fix the volute end cover (10) on the lower volute (4).

4. A DC brushless volute fan according to claim 1, characterized in that: The motor assembly comprises a motor end cover and a rotor assembly (17) arranged in the motor end cover, a stator core (20), a neodymium iron boron magnet (18), and a first ball bearing and a second ball bearing which are interference-fitted on the rotor assembly (17); the neodymium iron boron magnet (18) is glued and fixed on the rotor assembly (17), and a magnetic steel sheath (19) is interference-fitted outside the neodymium iron boron magnet (18); the driving end of the rotor assembly (17) passes through the through holes on the motor end cover, the volute end cover (10) and the lower volute (4) and is connected to the volute fan (3) in the upper volute (1) and fixed by a hexagonal nut (2); a heat dissipation fan (9) is also arranged in the volute end cover (10), and the heat dissipation fan (9) is fixed on the rotor assembly (17) by interference fit.

5. A DC brushless volute fan according to claim 4, characterized in that: The motor end cover comprises an upper end cover (12) and a lower end cover (23), wherein the upper end cover (12) and the lower end cover (23) are fixedly connected by a second long screw (13), and the stator core (20), the upper end cover (12), the lower end cover (23) and the rotor assembly (17) are locked together by the second long screw (13).

6. A DC brushless volute fan according to claim 5, characterized in that: The motor assembly further comprises a wave spring washer (15) and a steel washer (22), wherein the wave spring washer (15) and the steel washer (22) are respectively fixed inside the upper end cover (12) and the lower end cover (23) of the motor assembly by means of clearance fit.

7. A DC brushless volute fan according to claim 5, characterized in that: The upper end cover (12) is fixedly connected to the volute end cover (10) via short screws (14).

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