Modular fan

Abstract

The utility model relates to the technical field of fans, and provides a modular fan which comprises a stator shell, a stator core, a circuit board and a stator bottom shell, a rotor installation channel and an annular cavity are arranged on the stator shell, the rotor installation channel is used for installing a fan rotor, one side of the annular cavity is open, and the annular cavity surrounds the outer side of the rotor installation channel; and the stator core is fixed in the annular cavity of the stator shell. According to the modular fan, only the edge part of the circuit board can be subjected to dispensing treatment in the assembling process, automatic operation of equipment is better facilitated, compared with glue pouring treatment in the prior art, glue loss can be effectively reduced, automatic dispensing operation of the equipment is easier to carry out, in addition, due to the fact that the circuit board is adopted as a sealing component, the production cost is reduced, and the production efficiency is improved. Glue sealing treatment does not need to be considered, the glue pouring sealing performance is prevented from being affected by lead traction, and the glue sealing effect and the sealing stability are further improved.

Description

Technical Field

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

[0002] The modular design of the cooling fan allows users to select components of different models or specifications to assemble the fan according to their needs, thereby achieving personalized customization to meet different cooling needs. In addition, its modular design can simplify the production and assembly process, which helps manufacturers reduce production costs and improve economic benefits.

[0003] For example, in the prior art, there is a heat dissipation fan without a retaining spring, which is announced as CN218953595U. It can be set without a retaining spring, reduce the assembly process, and simplify the assembly process. The heat dissipation fans currently on the market generally adopt an assembly method in which the stator is pressed into the middle tube to install the fan blades. When processing some fans with certain waterproof requirements, the entire fan bottom plate is often potted with glue to cover the PCB board to achieve a sealing effect. However, this method is not effective in protecting the enameled wire part, and requires a large amount of sealant, which increases the manufacturing cost and has certain requirements for the fan structure. In addition, this method is only suitable for fans with larger hub surfaces, and is not applicable to all types of fan products. Utility Model Content

[0004] In view of this, the utility model proposes a modular fan, which arranges a stator shell, places the stator core, circuit board and other components completely inside the shell, and then seals the stator shell through the circuit board and the stator bottom shell. There is no need to fully pour glue on the stator bottom shell to achieve waterproof sealing, which can effectively reduce production costs and improve structural stability.

[0005] The technical solution of the utility model is implemented as follows: The utility model provides a modular fan, including a stator housing, a stator core, a circuit board and a stator bottom shell, wherein:

[0006] The stator housing is provided with a rotor installation channel and an annular cavity, wherein the rotor installation channel is used to install the fan rotor, and one side of the annular cavity is open and surrounds the outer side of the rotor installation channel;

[0007] The stator core is fixed in the annular cavity of the stator housing;

[0008] The circuit board is fixed in the annular cavity and is matched with the opening side of the annular cavity to seal the opening of the annular cavity from the inside of the annular cavity;

[0009] The stator bottom shell is fixed to the stator shell and is located at the opening side of the stator shell.

[0010] On the basis of the above technical solution, preferably, a receiving groove is provided on the stator bottom shell, and the opening side of the stator outer shell is inserted into the receiving groove, so as to block the opening of the stator outer shell through the stator bottom shell.

[0011] On the basis of the above technical solution, preferably, a slot is provided on the stator shell, and the stator bottom shell includes a claw, and the claw extends into the slot and engages with the slot to fix the stator shell and the stator bottom shell.

[0012] On the basis of the above technical solution, preferably, the stator housing includes a positioning pin, and a positioning groove is provided on the stator bottom housing, and the positioning pin is inserted into the positioning groove to prevent the stator bottom housing and the stator housing from rotating relative to each other.

[0013] On the basis of the above technical solution, preferably, it further comprises a rotor assembly, and the rotor assembly is rotatably sleeved on the outside of the stator housing.

[0014] Further preferably, the rotor assembly includes a rotating shaft and fan blades, wherein:

[0015] The rotating shaft is inserted into the rotor mounting channel so that the rotor assembly can rotate relative to the stator housing;

[0016] The fan blade is sleeved on the outside of the stator shell and is fixed to an end of the rotating shaft away from the stator bottom shell.

[0017] More preferably, it also includes an outer frame, which is fixed to the outside of the stator bottom shell, and the fan blades are located inside the outer frame.

[0018] More preferably, two stepped grooves are provided in the installation channel, bearings are provided in the two stepped grooves, and the rotating shaft passes through the two bearings to be connected to the stator housing through the bearings.

[0019] More preferably, it also includes a ring buckle, which is arranged on an end of the rotating shaft away from the fan blades to prevent the rotating shaft from being separated from the bearing.

[0020] More preferably, a buffer is further included, wherein the buffer is arranged in the installation channel and located between the two bearings, and one end of the buffer is abutted against one of the two bearings.

[0021] The modular fan of the utility model has the following beneficial effects compared with the prior art:

[0022] (1) By setting a stator housing and using the circuit board and the stator bottom shell as double-layer sealing components of the stator housing, during the assembly process, only the edge of the circuit board can be glued, which is more conducive to the automated operation of the equipment. Compared with the glue filling process in the prior art, it can effectively reduce the loss of glue and is easier to perform the automated glue filling operation of the equipment. In addition, since the circuit board is used as the sealing component, there is no need to consider the wire for glue sealing, which avoids the wire pulling affecting the glue filling sealing performance, thereby further improving the sealing effect and sealing stability;

[0023] (2) By providing the claws and the slots, the claws can be deformed and inserted into the slots during the assembly process to fix the stator housing and the stator bottom shell, which is convenient for early assembly and later disassembly and maintenance. In addition, by providing the positioning pins and the positioning slots, when the positioning pins are inserted into the positioning slots, the positioning pins will produce a small deformation and abut against the groove surfaces on both sides of the positioning slots, thereby hindering the relative rotation of the stator housing and the stator bottom shell, improving the connection stability between the stator housing and the stator bottom shell, and avoiding mechanical collision during the rotation of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A three-dimensional diagram of a modular fan of the present invention;

[0026] Figure 2 It is an overall cross-sectional view of the modular fan of the utility model;

[0027] Figure 3 It is a cross-sectional view of the connection between the stator housing and the rotor assembly of the modular fan of the utility model;

[0028] Figure 4 This is a schematic diagram of the internal structure of the stator housing of the modular fan of the utility model;

[0029] Figure 5 It is a side cross-sectional view of the rotor assembly of the modular fan of the utility model;

[0030] Figure 6 It is a side view of a modular fan without a rotor assembly of the utility model;

[0031] Figure 7 for Figure 6 A is an enlarged schematic diagram. DETAILED DESCRIPTION

[0032] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figure 1-7 As shown, the modular fan of the utility model includes a stator housing 1, a stator core 2, a circuit board 3 and a stator bottom shell 4.

[0034] A rotor mounting channel 101 and an annular cavity 102 are provided on the stator housing 1. The rotor mounting channel 101 is used to mount the fan rotor. One side of the annular cavity 102 is open and surrounds the outer side of the rotor mounting channel 101. The stator housing 1 is integrally injection molded, and includes three coaxial circular tubes with different radii, which are arranged according to the radius, namely the first circular tube, the second circular tube and the third circular tube. The ends of the first circular tube and the second circular tube are fixed to form a stepped cylindrical structure. The third circular tube is inserted into the first circular tube and the second circular tube, and one end of the third circular tube is fixed to an end of the second circular tube away from the first circular tube. The side of the third circular tube away from the second circular tube is the opening side of the stator housing 1, and the interior of the third circular tube is the mounting channel 101. The interiors of the second circular tube and the first circular tube form an annular cavity 102 surrounding the outside of the third circular tube, wherein the third circular tube is used to connect the rotor part of the fan.

[0035] The stator core 2 is fixed in the annular cavity 102 of the stator housing 1, specifically in the second circular tube of the stator housing 1. The second circular tube is used to install the stator core 2. During the assembly process, a winding is required to be set on the outside of the stator core 2 to cooperate with the magnets of the rotor part to drive the fan to rotate. The stator core 2 should be set to be just accommodated in the second circular tube to avoid the stator core 2 and the rotor part The magnet spacing is too large, and the radius difference between the first circular tube and the second circular tube will be used to assemble the magnets on the fan rotor.

[0036] The circuit board 3 is fixed in the annular cavity 102 and is matched with the opening side of the annular cavity 102 to seal the opening of the annular cavity 102 from the inside of the annular cavity 102. The circuit board 3 includes a driving PCB board and a PCB output board. A positioning and fixing column is also provided in the stator housing 1 to install the driving PCB board and the PCB output board. The output end of the PCB output board is disc-shaped as a whole, and a matching opening is provided at the center of the circle. The third circular tube passes through the PCB output board through the matching opening. The PCB output board is used as a sealing component of the stator housing 1. During the processing, the edge sealing of the PCB output board can be achieved by performing mechanized glue dispensing operations on the outer side and the inner side of the PCB output board, thereby forming an internal seal of the annular cavity 102. Compared with the glue filling process in the prior art, the glue loss can be effectively reduced, and it is easier to perform the automated glue dispensing operation of the equipment. In addition, in order to further facilitate the installation of the PCB output board and improve the sealing effect, an annular stepped groove is also provided in the annular cavity 102, which is specifically used to accommodate the PCB output board, so that the edge contact surface of the PCB output board is increased, and the glue sealing effect and sealing stability are improved.

[0037] The stator bottom shell 4 is fixed to the stator housing 1 and is located on the opening side of the stator housing 1. The stator bottom shell 4 is a fixed component on the fan module, directly connected to the stator part, and the stator housing 1 is sealed for a second time, so as to further improve the sealing performance inside the stator housing 1 and improve the waterproof ability. The side of the PCB output board facing the stator bottom shell 4 is directly connected to the wire, and the wire is welded here. Since the wire is on a different side from the electronic device, the wire does not need to be sealed with glue for the sealed PCB output board, thereby avoiding the problem of wire pulling in the existing process affecting the sealing performance of the glue filling.

[0038] In this embodiment, a receiving groove 401 is provided on the stator bottom shell 4, and the open side of the stator shell 1 is inserted into the receiving groove 401, so that the opening of the stator shell 1 is blocked by the stator bottom shell 4. The receiving groove 401 is adapted to the outer size of the third round tube of the stator shell 1, so that the third round tube of the stator shell 1 can be just inserted into the receiving groove 401, and the open side of the third round tube is closed, and at the same time, it is more convenient to assemble the stator bottom shell 4 and the stator shell 1.

[0039] As a preferred embodiment, in order to relatively fix the stator housing 1 and the stator bottom shell 4, a slot 103 is provided on the stator housing 1, and the stator bottom shell 4 includes a claw 41, which extends into the slot 103 and engages with the slot 103 to fix the stator housing 1 and the stator bottom shell 4. The number of the claws 41 is set to four, and they are annularly distributed on the outer periphery of the accommodating groove 401. The claw 41 is an integrally formed component of the stator bottom shell 4. Compared with the stator bottom shell 4 as a whole, the thickness thereof is thin-walled, so that it has a certain elastic activity space. During the assembly process, the claw 41 can be deformed and inserted into the slot 103 to fix the stator housing 1 and the stator bottom shell 4. At the same time, this clamping method is also convenient for early assembly and later disassembly and maintenance.

[0040] In the production process, due to the influence of precision, the claw 41 cannot completely cooperate with the slot 103 to limit the relative rotation of the stator housing 1 and the stator bottom shell 4, and there will be a certain gap. In order to avoid the relative deflection of the stator housing 1 and the stator bottom shell 4 under the influence of the gap, resulting in mechanical wear, a positioning part is also provided in this embodiment, specifically, the stator housing 1 includes a positioning pin 11, and a positioning groove 402 is provided on the stator bottom shell 4. The positioning pin 11 is inserted into the positioning groove 402 to prevent the stator bottom shell 4 and the stator housing 1 from rotating relative to each other. The groove surfaces on both sides of the positioning groove 402 are set as inclined surfaces, that is, a V-shaped setting. When the positioning pin 11 is inserted into the positioning groove 402, the positioning pin 11 will produce a small deformation and abut against the groove surfaces on both sides of the positioning groove 402, thereby hindering the relative rotation of the stator housing 1 and the stator bottom shell 4, thereby improving the connection stability between the stator housing 1 and the stator bottom shell 4, and avoiding mechanical collision during the rotation of the fan.

[0041] In this embodiment, a rotor assembly 5 is also provided, which is rotatably mounted on the outside of the stator housing 1. The rotor assembly 5 is the rotating part of the fan, and can rotate under the action of the magnetic field formed by the power supply of the winding on the iron core.

[0042] Specifically, the rotor assembly 5 includes a rotating shaft 51 and a fan blade 52. The rotating shaft 51 is inserted into the rotor mounting channel 101 so that the rotor assembly 5 can rotate relative to the stator housing 1. The fan blade 52 is sleeved on the outside of the stator housing 1 and is fixed to the end of the rotating shaft 51 away from the stator bottom shell 4. The rotating shaft 51 is inserted into the third circular tube to be coaxial with the second circular tube and the first circular tube. The fan blade 52 has a protective shell and a plurality of blades. The protective shell cover is arranged on the outside of the second circular tube and the first circular tube and does not contact the second circular tube and the first circular tube. It is supported only by the rotating shaft 51 during rotation. In addition, for the consistency of the modules, the outer diameter of the protective shell is set to be consistent with the outer diameter of the stator bottom shell 4 to improve the overall aesthetics.

[0043] In this embodiment, an outer frame 6 is also provided, and the outer frame 6 is fixed to the outside of the stator bottom shell 4, and the fan blades 52 are located in the outer frame 6. The outer frame 6 is fixed to the stator bottom shell 4 through four bridge arms, and the outer frame 6 and the stator bottom shell 4 can be manufactured in an integrally formed manner. The outer frame 6 is a rectangular parallelepiped as a whole, and a circular inner cavity is provided therein. Both sides of the circular inner cavity are open, so that the fan can push air through the two openings to form an airflow. In addition, four mounting holes are provided on the outer frame 6, so that the outer frame 6 can be fixed to the fan module through the four mounting holes using screws.

[0044] In this embodiment, in order to install the rotating shaft 51 in the third round tube, two stepped grooves are opened in the installation channel 101, and bearings are arranged in the two stepped grooves. The rotating shaft 51 passes through the two bearings to be connected to the stator housing 1 through the bearings. The opening directions of the two stepped grooves are opposite to each other. During assembly, the two bearings are inserted into the installation channel 101 from both sides of the third round tube, and then the rotating shaft 51 is inserted into the two bearings, so as to realize the rotational connection between the rotating shaft 51 and the third round tube.

[0045] In addition, in this embodiment, a ring buckle 7 is also provided. The ring buckle 7 is provided on the end of the rotating shaft 51 away from the fan blades 52 to prevent the rotating shaft 51 from being separated from the bearing. The provided ring buckle can hinder the rotating shaft 51 from rotating and causing it to be separated from the bearing due to axial movement. A gasket sleeved on the rotating shaft 51 is also provided on the side of the ring buckle close to the bearing. The gasket can increase the force area between the bearing and the ring buckle 7 to avoid wear on the bearing. The provided step groove can prevent the bearing from being separated from the mounting channel 101.

[0046] As a preferred embodiment, a buffer 8 is also provided. The buffer 8 is arranged in the installation channel 101 and is located between the two bearings. One end of the buffer 8 is abutted against one of the two bearings. During the assembly process of the bearing and the rotating shaft 51, due to the influence of the error, there will be a certain error in the axial direction. Although the buckle 7 can prevent the rotating shaft 51 from leaving the installation channel 101, it cannot prevent the bearing from moving axially under the influence of the error. When the rotor part and the bearing move axially, wear is inevitable. The buffer 8 can hinder and buffer the axial movement. At the same time, after the rotating shaft 51 moves axially, the rotating shaft 51 is pushed to reset. The buffer 8 is preferably a spring, which performs buffering operations through its own elasticity, improves the structural stability, and reduces the mechanical wear during the operation of the fan.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular fan, characterized in that: It comprises a stator housing (1), a stator core (2), a circuit board (3) and a stator bottom shell (4), wherein: A rotor installation channel (101) and an annular cavity (102) are provided on the stator housing (1), wherein the rotor installation channel (101) is used to install a fan rotor, and one side of the annular cavity (102) is open and surrounds the outer side of the rotor installation channel (101); The stator core (2) is fixed in the annular cavity (102) of the stator housing (1); The circuit board (3) is fixed in the annular cavity (102) and is matched with the opening side of the annular cavity (102) so as to seal the opening of the annular cavity (102) from the inside of the annular cavity (102); The stator bottom shell (4) is fixed to the stator outer shell (1) and is located on the opening side of the stator outer shell (1).

2. The modular fan according to claim 1, characterized in that: The stator bottom shell (4) is provided with a receiving groove (401), and the opening side of the stator outer shell (1) is inserted into the receiving groove (401), so as to seal the opening of the stator outer shell (1) through the stator bottom shell (4).

3. The modular fan according to claim 1, characterized in that: The stator housing (1) is provided with a slot (103), and the stator bottom housing (4) comprises a claw (41), wherein the claw (41) extends into the slot (103) and engages with the slot (103) to fix the stator housing (1) and the stator bottom housing (4).

4. The modular fan according to claim 1, characterized in that: The stator housing (1) comprises a positioning pin (11), and a positioning groove (402) is provided on the stator bottom housing (4). The positioning pin (11) is inserted into the positioning groove (402) to prevent the stator bottom housing (4) and the stator housing (1) from rotating relative to each other.

5. The modular fan according to claim 1, characterized in that: It also comprises a rotor assembly (5), wherein the rotor assembly (5) is rotatably sleeved on the outside of the stator housing (1).

6. The modular fan according to claim 5, characterized in that: The rotor assembly (5) comprises a rotating shaft (51) and blades (52), wherein: The rotating shaft (51) is inserted into the rotor installation channel (101) so that the rotor assembly (5) can rotate relative to the stator housing (1); The fan blade (52) is sleeved on the outside of the stator housing (1) and is fixed to an end of the rotating shaft (51) away from the stator bottom housing (4).

7. The modular fan according to claim 6, characterized in that: It also includes an outer frame (6), the outer frame (6) is fixed to the outer side of the stator bottom shell (4), and the fan blades (52) are located inside the outer frame (6).

8. The modular fan according to claim 6, characterized in that: Two stepped grooves are provided in the installation channel (101), bearings are arranged in the two stepped grooves, and the rotating shaft (51) passes through the two bearings to be connected to the stator housing (1) through the bearings.

9. The modular fan according to claim 8, characterized in that: It also comprises a buckle (7), which is arranged on one end of the rotating shaft (51) away from the fan blades (52) to prevent the rotating shaft (51) from being separated from the bearing.

10. The modular fan according to claim 8, characterized in that: It also comprises a buffer member (8), which is arranged in the installation channel (101) and located between the two bearings, and one end of the buffer member (8) abuts against one of the two bearings.

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