Brushless fan structure

Abstract

A brushless fan structure, comprising: an impeller, a casing, a driving assembly and a plug seat, the impeller and the driving assembly are arranged in the casing, the impeller is connected with one end of the driving assembly, and the plug seat is arranged on one side of the casing and connected with the other end of the driving assembly; the driving assembly comprises: a bearing, a stator seat, a rotating shaft, a magnet and an iron core, the stator seat is inserted into the casing, the iron core is arranged in the stator seat, a wire rack for winding a coil is arranged on the inner wall of the iron core, one end of the rotating shaft is inserted into the iron core, the other end of the rotating shaft passes through the bearing arranged in the stator seat and is connected with the impeller, and the magnet is arranged on the rotating shaft at a position inside the iron core. The brushless fan of the application has the beneficial effect that each part of the brushless fan can be mechanically positioned, and can be assembled separately by mechanical cooperation, and can be tested separately after simple connection, without causing the scrapping of other parts, compared with similar products, without waiting for the glue to dry in production, and more easily to realize automatic production.

Description

Technical Field

[0001] This invention relates to the field of ventilation technology in home appliances, industry, etc., and specifically to a brushless fan structure. Background Technology

[0002] In the current brushless fan assembly process, most parts are fixed by adhesive bonding, which has the problem of long bonding time. Moreover, product performance testing can only be carried out after assembly to know whether the product can work properly. If the product is defective due to the quality of parts or assembly problems, disassembling the motor at this time will lead to the scrapping of parts. Therefore, the product has the disadvantages of difficult assembly, high scrap rate, low production efficiency and high production cost.

[0003] Most similar products on the market isolate the iron core from the air duct. The motor generates a lot of heat during operation. The traditional motor structure is not conducive to dissipating heat, which causes the motor bearings, coils and other parts to become less efficient at high temperatures, or even cause the parts to fail. This reduces the performance of the motor and directly affects the lifespan of the brushed motor. Summary of the Invention

[0004] To effectively address the shortcomings of the aforementioned technical issues, a brushless fan structure is provided.

[0005] The specific solution of this invention is as follows:

[0006] A brushless fan structure includes: a moving impeller, a housing, a drive assembly, and a connector. The moving impeller and the drive assembly are disposed within the housing. The moving impeller is connected to one end of the drive assembly, and the connector is disposed on one side of the housing and connected to the other end of the drive assembly. The characteristic feature is that:

[0007] The drive assembly includes: a bearing, a stator base, a rotating shaft, a magnet, and an iron core. The stator base is inserted into the housing, and the iron core is disposed within the stator base. A wire frame for winding coils is provided on the inner wall of the iron core. One end of the rotating shaft passes through the iron core, and the other end of the rotating shaft passes through the bearing disposed within the stator base and is connected to the moving impeller. The magnet is disposed on the rotating shaft at a position inside the iron core.

[0008] Optionally, the housing is cylindrical, and a first fixed sleeve and guide vanes are provided inside the housing. The first fixed sleeve is coaxially arranged with the housing, and a plurality of guide vanes are arranged in a circular array with the axis of the first fixed sleeve as the center. One end of the guide vane is connected to the outer wall of the first fixed sleeve, and the other end of the guide vane is connected to the inner wall of the housing. Each guide vane is inclined according to the principle of fluid dynamics.

[0009] The guide vane is airfoil-shaped, the guide vane has a length of L, and the guide vane has the maximum thickness at a point 0.47L on the guide vane.

[0010] Optionally, the stator base includes: a second fixing sleeve, a support arm, and a support ring. The second fixing sleeve is inserted into the first fixing sleeve. The second fixing sleeve and the support ring are coaxially arranged. One end of the plurality of support arms is connected to the second fixing sleeve, and the other end of the support arm is connected to the support ring. The second fixing sleeve, the support arm, and the support ring together constitute a cage-like structure for accommodating the iron core.

[0011] Optionally, the outer wall of the second fixing sleeve is provided with a plurality of first grooves for assisting in guiding airflow.

[0012] Optionally, the inner wall of the support arm is provided with a limiting protrusion that cooperates with the iron core, and the outer wall of the iron core is provided with a plurality of limiting grooves that cooperate with the limiting protrusion.

[0013] The support ring is provided with multiple riveting grooves at the positions corresponding to the upper limit groove of the iron core, which are used to rivet the stator base to the iron core.

[0014] Optionally, a lug is provided on the outer wall of the support arm, one end of the lug is connected to the outer wall of the support arm, and the other end of the lug abuts against the inner wall of the housing.

[0015] Optionally, the bearing is disposed within the second fixed sleeve, and the rotating shaft passes through the bearing located within the second fixed sleeve and is connected to the moving impeller;

[0016] The impeller includes a hub and multiple blades disposed on the hub. The hub is connected to a rotating shaft, and the windward surface of the hub is arc-shaped.

[0017] Optionally, the rotating shaft is further provided with a positioning sleeve for accurately positioning the magnet inside the iron core. The positioning sleeve is fitted on the rotating shaft and located between the bearing and the magnet, so that the magnet on the rotating shaft is aligned with the wire frame.

[0018] Optionally, a first positioning groove adapted to the position of the support arm is provided on the side of the first fixing sleeve near the stator seat.

[0019] Optionally, the first fixed sleeve is provided with a first flange on the side away from the stator seat for limiting the second fixed sleeve, the first flange is provided with a second positioning groove, and the end face of the second fixed sleeve near the first fixed sleeve is provided with a positioning protrusion that matches the shape of the inner wall of the first flange.

[0020] The beneficial effects of this invention are as follows: the various parts of the brushless fan can be mechanically positioned and assembled individually through mechanical cooperation. Compared with similar products, this reduces material loss during assembly, improves production efficiency, and allows for individual testing after simple connection. Only qualified parts can proceed to the next process without scrapping other components, thus saving energy. Connections are no longer made using glue, but rather through interference fits or riveting, eliminating the need for adhesive bonding. Compared with similar products, there is no need to wait for glue to dry during production, making automated production easier. The stator base adopts a cage-like structure and is equipped with a first groove to facilitate airflow, allowing the iron core to effectively dissipate heat, solving the problem of difficult heat dissipation in existing motors. It also improves the airflow environment, forming a contraction space at the airflow outlet, reducing eddy current formation, improving motor efficiency, and reducing heat loss. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the disassembled structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention when using a T-type high-speed bearing;

[0023] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the present invention when using conventional bearings;

[0024] Figure 4 This is a schematic diagram of the housing structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the end face structure of the housing of the present invention;

[0026] Figure 6 for Figure 5 Schematic diagram of the AA section structure;

[0027] Figure 7 for Figure 6 Enlarged view at point B in the middle;

[0028] Figure 8 This is a schematic diagram of the stator base structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the core structure of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the stator base and the iron core in the mating state of the present invention;

[0031] Figure 11 This is a schematic diagram of the moving impeller structure of the present invention. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the combination or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, in the description of the embodiments of this invention, the positional relationships of devices such as "upper," "lower," "front," "rear," "left," and "right" in all figures are based on… Figure 1 As the standard.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] The present invention will be further described below with reference to the accompanying drawings:

[0036] like Figure 1 , 2 As shown, a brushless fan structure includes: a moving impeller 1, a housing 2, a drive assembly, and a socket 3. The moving impeller 1 and the drive assembly are disposed inside the housing 2. The moving impeller 1 is connected to one end of the drive assembly, and the socket 3 is disposed on one side of the housing 2 and connected to the other end of the drive assembly.

[0037] The drive assembly includes: a bearing 4, a stator base 5, a rotating shaft 6, a magnet 7, and an iron core 8. The stator base 5 is inserted into the housing 2, and the iron core 8 is disposed inside the stator base 5. A wire frame 9 for winding coils is provided on the inner wall of the iron core 8. The wire socket 3 is connected to the coil wound on the wire frame 9. One end of the rotating shaft 6 passes through the iron core 8, and the other end of the rotating shaft 6 passes through the bearing 4 disposed inside the stator base 5 and is connected to the moving impeller 1. The magnet 7 is disposed on the rotating shaft 6 at a position inside the iron core 8.

[0038] like Figure 3-5As shown, the housing 2 is cylindrical, and a first fixing sleeve 21 and guide vanes 22 are provided inside the housing 2. The first fixing sleeve 21 is coaxially arranged with the housing 2. A plurality of guide vanes 22 are arranged in a circular array with the axis of the first fixing sleeve 21 as the center. One end of the guide vane 22 is connected to the outer wall of the first fixing sleeve 21, and the other end of the guide vane 22 is connected to the inner wall of the housing 2. Each guide vane 22 is inclined according to the principle of fluid mechanics. The first fixing sleeve 21 is used to cooperate with the stator seat 5. The guide vanes 22 play a guiding role for the airflow.

[0039] like Figure 5-7 As shown, the guide vane 22 is airfoil-shaped, the length of the guide vane 22 is L, and the thickness of the guide vane 22 is at 0.47L. This can reduce the separation phenomenon of airflow passing through the guide vane 22 and reduce the risk of generating eddies, reduce the turbulence and eddies of gas in the air duct, minimize airflow loss, effectively reduce airflow noise, and improve the overall performance of the fan.

[0040] like Figure 8 As shown, the stator base 5 includes: a second fixing sleeve 51, a support arm 52, and a support ring 53. The second fixing sleeve 51 is inserted into the first fixing sleeve 21. The second fixing sleeve 51 and the support ring 53 are coaxially arranged. One end of the plurality of support arms 52 is connected to the second fixing sleeve 51, and the other end of the support arm 52 is connected to the support ring 53. The second fixing sleeve 51, the support arm 52, and the support ring 53 together constitute a cage-like structure for accommodating the iron core 8.

[0041] like Figure 8 As shown, the outer wall of the second fixing sleeve 51 is provided with a plurality of first grooves 511 for assisting in airflow. When the second fixing sleeve 51 is inserted into the first fixing sleeve 21, the outer wall of the second fixing sleeve 51 is in close contact with the inner wall of the first fixing sleeve 21. The first grooves 511 and the inner wall of the first fixing sleeve 21 form an auxiliary air channel, allowing airflow to pass through and carry away the heat of the iron core 8, thereby dissipating heat from the iron core 8 inside the stator base 5. To ensure a stable connection, the first fixing sleeve 21 and the second fixing sleeve 51 are fitted with an interference fit.

[0042] like Figure 8-9 As shown, the inner wall of the support arm 52 is provided with a limiting protrusion 521 that cooperates with the iron core 8, and the outer wall of the iron core 8 is provided with a plurality of limiting grooves 81 that cooperate with the limiting protrusion 521. Figure 9As shown, when the iron core 8 is inserted into the stator base 5, the limiting protrusion 521 on the support arm 52 is located within the limiting groove 81 of the iron core 8, fixing the iron core 8 and preventing it from shaking, effectively increasing the stability of the iron core 8. In this embodiment, there are three support arms 52 and three limiting grooves 81, which are equally spaced on the outer wall of the iron core 8. In other embodiments, the number of support arms 52 and limiting grooves 81 is multiple, without specific limitation.

[0043] like Figure 8 As shown, the support ring 53 has multiple riveting grooves 531 at positions corresponding to the upper limit groove 81 of the iron core 8, used to rivet the stator base 5 to the iron core 8. When the stator base 5 and the iron core 8 are engaged, the support ring 53 is riveted and fixed to the upper limit groove 81 on the iron core 8 by pressing the riveting grooves 531, thus fixing the iron core 8 in the stator base 5. The multi-point riveting between the iron core 8 and the stator base 5 can prevent displacement when the motor operates at high temperatures for a long time, making the positioning more reliable.

[0044] like Figure 8 , 10 As shown, a lug 522 is provided on the outer wall of the support arm 52. One end of the lug 522 is connected to the outer wall of the support arm 52, and the other end of the lug 522 abuts against the inner wall of the housing 2. The lug 522 serves two purposes: firstly, it diverts the airflow from the air duct outlet to maintain the airflow speed; secondly, it contacts the housing 2 to provide support, ensuring that the motor will not loosen or shift due to vibration, heat, or other factors after assembly, thus enhancing product stability.

[0045] like Figure 2 , 3 As shown, the bearing 4 is disposed within the second fixed sleeve 51, and the rotating shaft 6 passes through the bearing 4 located within the second fixed sleeve 51 and is connected to the moving impeller 1. The bearing 4 can be a conventional bearing, preferably a T-type high-speed bearing, and the second fixed sleeve 51 has a stepped hole adapted to the bearing 4.

[0046] like Figure 2 , 3 As shown, the rotating shaft 6 is also provided with a positioning sleeve 61 for accurately positioning the magnet 7 inside the iron core 8. The positioning sleeve 61 is sleeved on the rotating shaft 6 and located between the bearing 4 and the magnet 7, so that the magnet 7 on the rotating shaft 6 is aligned with the wire frame 9, ensuring that the permanent magnetic field and the electromagnetic field are reasonably matched.

[0047] like Figure 5As shown, the first fixed sleeve 21 is provided with a first positioning groove 211 on the side near the stator seat 5 to adapt to the position of the support arm 52. The first positioning groove 211 cooperates with the support arm 52 to guide the stator seat 5 to be accurately assembled with the housing 2, ensuring the fan's centering requirements under high-speed operation, ensuring that the motor will not be displaced when running at high speed, and increasing the reliability of the product.

[0048] like Figure 5 As shown, the first fixed sleeve 21 is provided with a first flange 212 on the side away from the stator base 5 for limiting the second fixed sleeve 51. The first flange 212 is provided with a second positioning groove 213. The end face of the second fixed sleeve 51 near the first fixed sleeve 21 is provided with a positioning protrusion 512 that matches the shape of the inner wall of the first flange 212, which can more accurately allow the stator base 5 to dock with the housing 2.

[0049] like Figure 11 As shown, the impeller 1 includes a hub 11 and a plurality of blades 12 disposed on the hub 11. The hub 11 is connected to the rotating shaft 6. The windward surface of the hub 11 is arc-shaped to reduce the air intake resistance.

[0050] like Figure 1 , 10 As shown, the socket 3 is connected to the coil wound on the wire frame 9. When the socket 3 is energized, the coil is energized to form an electromagnetic field, which drives the rotating shaft 6 to rotate.

[0051] The beneficial effects of this invention are as follows: the various parts of the brushless fan can be mechanically positioned and assembled individually through mechanical cooperation. Compared with similar products, this reduces material loss during assembly, improves production efficiency, and allows for individual testing after simple connection. Only qualified parts can proceed to the next process without scrapping other components, thus saving energy. Connections are no longer made using glue, but rather through interference fits or riveting, eliminating the need for adhesive bonding. Compared with similar products, there is no need to wait for glue to dry during production, making automated production easier. The stator base adopts a cage-like structure and is equipped with a first groove to facilitate airflow, allowing the iron core to effectively dissipate heat, solving the problem of difficult heat dissipation in existing motors. It also improves the airflow environment, forming a contraction space at the airflow outlet, reducing eddy current formation, improving motor efficiency, and reducing heat loss.

Claims

1. A brushless fan structure comprising: Impeller (1), casing (2), drive assembly and plug seat (3), the impeller (1) and drive assembly are arranged in the casing (2), the impeller (1) is connected with the drive assembly one end, the plug seat (3) is arranged in the casing (2) one side and is connected with the drive assembly other end, it is characterized by: The drive assembly includes: bearing (4), stator seat (5), shaft (6), magnet (7) and iron core (8), the stator seat (5) is inserted in the casing (2), the iron core (8) is arranged in the stator seat (5), the inner wall of the iron core (8) is provided with the wire holder (9) for winding coil, the shaft (6) one end is arranged in the iron core (8), the shaft (6) other end passes through the bearing (4) arranged in the stator seat (5) and is connected with the impeller (1), the magnet (7) is arranged on the shaft (6) at the position inside the iron core (8); The casing (2) is cylindrical body, the first fixed sleeve (21) and guide vane (22) are arranged in the casing (2), the first fixed sleeve (21) is coaxially arranged with the casing (2), a plurality of guide vanes (22) are arranged in the form of circular array with the first fixed sleeve (21) as the center, one end of the guide vane (22) is connected to the outer wall of the first fixed sleeve (21), the other end of the guide vane (22) is connected to the inner wall of the casing (2), and each guide vane (22) is arranged obliquely; The stator seat (5) includes: second fixed sleeve (51), support arm (52) and support ring (53), the second fixed sleeve (51) is inserted into the first fixed sleeve (21), the second fixed sleeve (51) is coaxially arranged with the support ring (53), a plurality of support arms (52) are connected with the second fixed sleeve (51) one end, the support arms (52) are connected with the support ring (53) other end, and the second fixed sleeve (51), support arm (52) and support ring (53) jointly constitute a cage structure for accommodating the iron core (8); The support arm (52) is provided with a lug (522) on the outer side wall, one end of the lug (522) is connected to the outer side wall of the support arm (52), and the other end of the lug (522) abuts against the inner side wall of the casing (2); The first fixed sleeve (21) is provided with a first positioning groove (211) on the side close to the stator seat (5) and matched with the position of the support arm (52); The first fixed sleeve (21) is provided with a first flange (212) on the side away from the stator seat (5) for limiting the second fixed sleeve (51), and the first flange (212) is provided with a second positioning groove (213), and the end face of the second fixed sleeve (51) close to the first fixed sleeve (21) is provided with a positioning protrusion (512) matched with the shape of the inner wall of the first flange (212).

2. The brushless fan structure according to claim 1, characterized by, The outer side wall of the second fixed sleeve (51) is provided with a plurality of first grooves (511) for assisting the flow of air. 3.The brushless fan structure according to claim 1, characterized in that, The inner side wall of the support arm (52) is provided with a limiting protrusion (521) matched with the iron core (8), and the outer side wall of the iron core (8) is provided with a plurality of limiting grooves (81) matched with the limiting protrusion (521); A plurality of riveting grooves (531) for riveting connection of the stator seat (5) and the iron core (8) are arranged on the support ring (53) at positions corresponding to the limiting grooves (81) on the iron core (8). 4.The brushless fan structure according to claim 1, characterized in that, The bearing (4) is arranged in the second fixing sleeve (51), the rotating shaft (6) passes through the bearing (4) in the second fixing sleeve (51) and is connected with the moving impeller (1); The moving impeller (1) comprises a hub (11) and a plurality of blades (12) arranged on the hub (11), the hub (11) is connected with the rotating shaft (6), and the windward surface of the hub (11) is arc-shaped. 5.The brushless fan structure according to claim 1, characterized in that, The rotating shaft (6) is further provided with a positioning sleeve (61) for accurately positioning the magnet (7) in the iron core (8), the positioning sleeve (61) is sleeved on the rotating shaft (6) and located between the bearing (4) and the magnet (7), so that the magnet (7) on the rotating shaft (6) is aligned with the wire frame (9).

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