fan

Abstract

This invention provides a fan, comprising: a drive motor including a first output shaft; a magnetic gear including a driving rotor and a driven rotor, and an adjusting magnetic ring, wherein the driving rotor and the driven rotor are respectively located on opposite sides of the adjusting magnetic ring, and the driving rotor is mounted on the first output shaft, and the driven rotor can rotate under the action of the driving rotor; a first fan blade mounted on the first output shaft and capable of rotating under the action of the first output shaft; and a second fan blade connected to the driven rotor and capable of rotating with the driven rotor; the rotation center of the first output shaft and the rotation center of the driven rotor are parallel to each other. This type of fan, because it includes two fan blades with different rotation directions, can output a gentle, comfortable, and varied airflow pattern. Simultaneously, the interaction between the two fan blades can reduce noise. Furthermore, because this type of fan uses a magnetic gear, it also has advantages such as no mechanical friction, low vibration, low noise, and overload protection.

Description

[0001] The applicant declares that this application claims priority to Chinese Patent Application No. 202412000181.4, filed with the Chinese Patent Office on December 31, 2024, entitled "Fan", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of household appliances, and more specifically, to a fan. Background Technology

[0003] In related solutions, counter-rotating fans generally come in two forms. One type uses dual motors, which drive different blades to rotate, thus outputting a gentle, comfortable, and varied airflow. Furthermore, the interaction between the two blades reduces noise. However, the use of two sets of motors and drive systems leads to high costs. The other type uses a gear mechanism, resulting in a second functional shaft. However, the mechanical meshing of the gears generates mechanical noise, leading to a very poor user experience.

[0004] Therefore, designing a fan that can simultaneously output two different performances using a single motor, without the noise of mechanical gear meshing, has become an urgent problem to be solved. Summary of the Invention

[0005] The present invention aims to at least solve the problems of limited performance and high noise of counter-rotating fans in the prior art or related technologies.

[0006] Therefore, the object of the present invention is to provide a fan.

[0007] To achieve the above objectives, the first aspect of the present invention provides a fan, comprising: a drive motor including a first output shaft; a magnetic gear including a driving rotor and a driven rotor and an adjusting ring, wherein the driving rotor and the driven rotor are respectively located on opposite sides of the adjusting ring, and the driving rotor is mounted on the first output shaft, and the driven rotor is capable of rotating under the action of the driving rotor; a first fan blade mounted on the first output shaft and capable of rotating under the action of the first output shaft; and a second fan blade connected to the driven rotor and capable of rotating with the driven rotor, wherein the rotation center of the first output shaft and the rotation center of the driven rotor are parallel to each other.

[0008] The fan provided by the technical solution of the present invention includes a drive motor, a magnetic gear, a first fan blade, and a second fan blade. The drive motor and the magnetic gear can be assembled to form a counter-rotating motor. This counter-rotating motor has two output ends with opposite rotation directions, thereby driving two fan blades to rotate in opposite directions. Specifically, the magnetic gear includes a driving rotor mounted on the first output shaft of the drive motor, which rotates with the first output shaft. The magnetic gear also includes a driven rotor mounted corresponding to the driving rotor and a magnetic adjusting ring disposed between the driving rotor and the driven rotor. The magnetic adjusting ring is used to adjust the magnetic circuit between the driving rotor and the driven rotor, so that when the driving rotor rotates with the first output shaft, the magnetic adjusting ring can drive the driven rotor to rotate in the opposite direction by magnetic force. The first fan blade is mounted on the first output shaft and rotates with the first output shaft. The second fan blade is connected to the driven rotor and rotates with the driven rotor in the opposite direction to the rotation direction of the first fan blade. This allows the first and second fan blades to rotate in opposite directions, thus forming a counter-rotating fan with two fan blades rotating in opposite directions. The rotation center of the first output shaft and the rotation center of the driven rotor are parallel to each other, thereby ensuring the concentricity of the first output shaft and the driven rotor and improving the stability of the motor system.

[0009] Optionally, the first output shaft and the driven rotor are arranged coaxially.

[0010] This type of fan, featuring two blades rotating in opposite directions, can output a gentle, comfortable, and varied airflow. Furthermore, the interaction between the two blades reduces noise. Since it requires only one motor, it not only lowers the fan's cost but also simplifies its structure and reduces its size. Additionally, due to the use of magnetic gears, this fan offers advantages such as zero mechanical friction, low vibration, low noise, and overload protection.

[0011] In this design, the first and second fan blades are axial flow fans. This allows the airflow generated by the leading blade to swirl and be countered by the other blade, directly generating an axial flow that meets the fan outlet requirements. Therefore, guide vanes are unnecessary, resulting in a simpler, more compact fan structure and significantly reduced axial dimensions.

[0012] Furthermore, this structure allows for different airflow modes by adjusting the speed ratio between the active and driven rotors. For example, when the front-to-rear blade speed ratio is 1:2, the front blades further disperse the airflow from the rear blades, resulting in a very gentle breeze. At a 2:1 ratio, the rear blades propel the front blades, creating a powerful, pressurized airflow, which is highly effective for indoor ventilation. When the front-to-rear blade speed ratio is 1:1, both blades simultaneously agitate the air, achieving a large volume of circulating air. With 360° rotation in all directions, it functions as a circulating fan, and when used with air conditioning, it can create a more even indoor temperature.

[0013] The first fan blade is located in front of the second fan blade, meaning the first fan blade is designed to be closer to the air outlet side of the fan.

[0014] Optionally, in any of the above technical solutions, the fan also includes a control module electrically connected to the drive motor. When the control module adjusts the speed of the first fan blade, the speed of the second fan blade can be adjusted synchronously.

[0015] In any of the above technical solutions, optionally, the driven rotor includes: a second output shaft mounted on the first output shaft and capable of rotating relative to the first output shaft; and a second fan blade mounted on the second output shaft; when the first output shaft rotates, the second output shaft can rotate in the opposite direction relative to the first output shaft.

[0016] In this technical solution, the second output shaft is used to output power to the driven rotor. Thus, when the driven rotor rotates, the second output shaft drives the second fan blade to rotate. In other words, the second output shaft connects the driven rotor and the second fan blade. This solution, by incorporating the second output shaft, facilitates the installation of the second fan blade, thereby optimizing the overall fan structure. Furthermore, the second output shaft is supported and mounted on the first output shaft, further simplifying its installation.

[0017] In any of the above technical solutions, optionally, the drive motor further includes a motor body, at least a portion of the first output shaft is installed in the motor body, and the first output shaft includes a first output end and a second output end extending from two opposite sides of the motor body; the first fan blade is installed on the first output end, and the second output shaft and the active rotor are installed on the second output end.

[0018] In this technical solution, the two ends of the first output shaft extend from both sides of the motor body, thus forming two output ends. One output end is used to install the first fan blade, and the other output end is used to install the drive rotor and the second output shaft. This solution allows the first and second fan blades to be positioned at opposite ends of the motor body, thereby making the overall fan structure more stable.

[0019] In any of the above technical solutions, optionally, the drive motor further includes a motor body, at least a portion of the first output shaft is installed in the motor body, and the first output shaft includes a third output end extending from one side of the motor body; the first fan blade is installed on the third output end, at least a portion of the second output shaft is installed on the outside of the third output end; at least a portion of the second fan blade is disposed radially outside the first fan blade.

[0020] In this technical solution, one end of the first output shaft extends from one side of the motor body to form a third output end. The first fan blade is mounted on the third output end, and at least a portion of the second output shaft is mounted on the outer side of the third output end. This allows the first and second fan blades to be mounted on the same side of the motor body, thereby increasing the airflow. Simultaneously, the fact that at least a portion of the second fan blade is located radially outward of the first fan blade increases the internal air velocity and improves the uniformity of airflow.

[0021] Optionally, in any of the above technical solutions, the rotational speed of the second blade is less than that of the first blade.

[0022] In this technical solution, setting the rotation speed of the second fan blade to be lower than that of the first fan blade can increase the internal wind speed and improve the uniformity of airflow.

[0023] Optionally, in any of the above technical solutions, the fan further includes: one or more bearings mounted on the first output shaft, and a rotating hole provided on the second output shaft, wherein the second output shaft is sleeved on at least one bearing through the rotating hole.

[0024] In this technical solution, the second output shaft has a hollow internal structure, forming a rotation hole. One or more bearings are installed between the second and first output shafts, allowing the second output shaft to be mounted on the first output shaft and rotate relative to it. This achieves a rotatable mounting of the second output shaft on the first output shaft. Furthermore, this structure, where the second output shaft is supported and mounted on the first output shaft, ensures the concentricity of the two shafts, improves the stability of the motor system, and facilitates the installation of the second output shaft.

[0025] Optionally, there are two bearings, spaced apart along the first output shaft, which can improve the installation stability of the second output shaft.

[0026] In any of the above technical solutions, optionally, the second output shaft includes: a support sleeve, which is supported and mounted on the first output shaft and is rotatable relative to the first output shaft; a mounting part, which is connected to the support sleeve; at least a portion of the active rotor and the mounting part are respectively located on opposite sides of the adjusting ring; and the driven rotor is mounted on the mounting part at a position corresponding to the active rotor.

[0027] In this technical solution, the second output shaft comprises two parts. One part is a support sleeve, similar to a bushing, used to fit and mount onto the first output shaft. The other part is used to mount the driven rotor, allowing the driven rotor and the driving rotor to be positioned on opposite sides of the adjusting ring. The support sleeve and the mounting part are an integral structure, thus ensuring the strength of their connection.

[0028] Optionally, in any of the above technical solutions, the fan further includes: a mounting bracket, on which the drive motor and the adjusting magnetic ring are mounted; the drive motor further includes a motor body, with at least a portion of the first output shaft mounted in the motor body and at least a portion of the first output shaft extending out from the motor body; wherein the motor body and the magnetic gear are located on the same side of the mounting bracket, or the motor body and the magnetic gear are located on opposite sides of the mounting bracket.

[0029] In this technical solution, the mounting bracket forms a mounting platform for installing components such as the drive motor and the adjusting magnetic ring. The motor body and the magnetic gear can be mounted on the same side of the mounting bracket. Alternatively, the motor body and the magnetic gear can be mounted on opposite sides of the mounting bracket, thus simplifying the overall fan structure.

[0030] In any of the above technical solutions, optionally, the first output shaft includes: a first shaft segment, a second shaft segment, and a third shaft segment connected in sequence to each other, with the diameters of the first shaft segment, the second shaft segment, and the third shaft segment increasing sequentially; wherein, the driving rotor is mounted on the second shaft segment, the second output shaft is mounted on the first shaft segment, and the third shaft segment is located within the motor body.

[0031] In this technical solution, the first output shaft of the motor is a single-piece structure, which can be divided into three parts according to their diameter: a first shaft section, a second shaft section, and a third shaft section. The driving rotor is mounted on the second shaft section, the second output shaft is mounted on the first shaft section, and the third shaft section is located within the motor body. The different diameters of the various sections facilitate the assembly of components such as the motor, rotor, and bearings, and the different diameter sections form a stepped section. This stepped section serves to axially limit the movement of the assembled parts.

[0032] Optionally, in any of the above technical solutions, the first output shaft further includes a fourth shaft segment, which is connected to the side of the third shaft segment away from the second shaft segment and extends from the side of the motor body away from the second shaft segment. The fourth shaft segment is used to install the first fan blade.

[0033] In this technical solution, the first output shaft further includes a fourth shaft segment. The fourth shaft segment is used to mount the first fan blade. The diameter of the fourth shaft segment can be greater than or equal to the diameter of the third shaft segment, or it can be smaller than the diameter of the third shaft segment.

[0034] In any of the above technical solutions, optionally, the difference between the diameter of the second shaft segment and the diameter of the first shaft segment is greater than or equal to 0.5 mm and less than or equal to 2 mm, and / or the difference between the diameter of the third shaft segment and the diameter of the second shaft segment is greater than or equal to 0.5 mm and less than or equal to 2 mm.

[0035] In this technical solution, the three diameters of the shaft are D1, D2, and D3, where D1 < D2 < D3, and 0.5mm ≤ D2 - D1 ≤ 2mm. When D2 - D1 < 0.5mm, the machining is difficult, and the small diameter difference results in an excessively small step on the shaft, affecting its axial limiting function. When D2 - D1 > 2mm, the machining difficulty increases, leading to increased machining costs. Similarly, 0.5mm ≤ D3 - D2 ≤ 2mm. When D3 - D2 < 0.5mm, the machining is difficult, and the small diameter difference results in an excessively small step on the bearing, affecting its axial limiting function. When D3 - D2 > 2mm, the machining difficulty increases, leading to increased machining costs.

[0036] Optionally, in any of the above technical solutions, the fan further includes: a central mesh cover, on which a drive motor is mounted; a first mesh cover and a second mesh cover, which are respectively fixed on both sides of the central mesh cover along the axial direction of the first output shaft; wherein, the first fan blade is installed in the space enclosed by the first mesh cover and the central mesh cover, and the magnetic gear and the second fan blade are installed in the space enclosed by the second mesh cover and the central mesh cover.

[0037] In this technical solution, the central mesh cover serves two purposes: ventilation and installation of the drive motor and magnetic gear. Simultaneously, this solution creates an air duct between the first and second fan blades, allowing air blown out by the first fan blade to pass through the second fan blade and then be blown out by it.

[0038] In any of the above technical solutions, optionally, the magnetic adjustment ring includes: a mounting ring; a plurality of magnetic adjustment teeth, which are spaced apart on the mounting ring along a first circumferential direction, and a magnetic isolation hole is formed between two adjacent magnetic adjustment teeth, the mounting ring being located at one end of the plurality of magnetic adjustment teeth along the length direction; a connecting ring, which is connected to the end of the plurality of magnetic adjustment teeth away from the mounting ring, and the connecting ring and the mounting ring are spaced apart along the length direction; wherein, a magnetic isolation groove is provided on one or both ends of the magnetic adjustment teeth along the length direction.

[0039] In this technical solution, the adjusting ring includes a mounting ring and multiple adjusting teeth. Magnetic isolation holes are formed between the multiple adjusting teeth. The adjusting teeth are magnetically conductive, guiding the magnetic circuit between the driven rotor and the driving rotor, thus enabling them to rotate in opposite directions. Furthermore, the mounting ring is located at one end of the multiple adjusting teeth along their length; that is, the mounting ring only connects one end of the multiple adjusting teeth along their length, meaning that most of the length of the multiple adjusting teeth is unconnected. This creates relatively large magnetic isolation holes between the multiple adjusting teeth, effectively preventing magnetic leakage and improving the magnetic moment transmission effect between the driven rotor and the driving rotor. Therefore, when the adjusting ring is used in magnetic gears, it can improve the load capacity of the magnetic gears and reduce the risk of the magnetic gears losing synchronization.

[0040] Furthermore, by setting up magnetic isolation grooves, the leakage magnetic flux at both ends of the adjusting gear along the radial direction can be reduced, thereby further improving the magnetic moment transmission effect between the driven rotor and the driving rotor. Thus, when the adjusting ring is used in a magnetic gear, the load capacity of the magnetic gear can be further improved, and the risk of the magnetic gear losing synchronization can be reduced.

[0041] Meanwhile, since the magnetic isolation groove is located relatively close to the end, the structure of the magnetic adjustment ring at the end is relatively weak. Therefore, in order to increase the wall thickness of the magnetic adjustment teeth at the end, a chamfer can be set at the connection of the two sides of the magnetic isolation groove near the end. This can appropriately increase the thickness of the magnetic isolation groove near the end, thereby improving the structural strength of the magnetic adjustment ring.

[0042] Furthermore, since the mounting ring has a hollow structure in the middle, it can further prevent magnetic field leakage through the mounting ring.

[0043] Furthermore, the two ends of multiple adjusting teeth along their length are connected by mounting rings and connecting rings, which ensures the strength of the adjusting ring and prevents deformation of the adjusting teeth during operation. At the same time, this structure, with its mounting rings and connecting rings, simplifies the structure of the adjusting ring and improves its magnetic shielding effect, preventing magnetic leakage due to the mounting structure at both ends.

[0044] In any of the above technical solutions, optionally, the magnetic adjustment teeth include two ends arranged along the length direction, and the magnetic isolation groove is provided with a chamfer. The chamfer is provided on the side of the magnetic isolation groove near the end, and one or both ends of the magnetic isolation groove distributed along the first circumferential direction are provided with a chamfer.

[0045] In this technical solution, since the magnetic isolation groove is located relatively close to the end, the structure of the magnetic adjustment ring at the end is relatively weak. Therefore, in order to increase the wall thickness of the magnetic adjustment teeth at the end, a chamfer can be provided at the connection between the two sides of the magnetic isolation groove near the end. This can appropriately increase the thickness of the magnetic isolation groove near the end, thereby improving the structural strength of the magnetic adjustment ring.

[0046] Furthermore, the magnetic shielding groove is provided with chamfers at one or both ends along the first circumferential direction. That is, only one chamfer can be provided on the side of the magnetic shielding groove near the end for single-sided structural reinforcement, or two chamfers can be provided for double-sided structural reinforcement.

[0047] Optionally, multiple adjusting teeth are arranged along the axial direction of the mounting ring, and the mounting ring and connecting ring are spaced apart along the axial direction of the mounting ring; or multiple adjusting teeth are arranged radially on the inner side of the mounting ring, and the mounting ring and connecting ring are spaced apart along the radial direction of the mounting ring.

[0048] In any of the above technical solutions, optionally, the number of poles of the driving rotor is P1 and the number of poles of the driven rotor is P2, wherein: P1 and P2 are both even numbers, and P1 is less than P2, and / or 0.3≤P2 / P1≤3; and / or the rotational speed of the first blade is n1 and the rotational speed of the second blade is n2, 0.3≤n2 / n1≤3.

[0049] In this technical solution, the number of poles of the driving rotor is P1, and the number of poles of the driven rotor is P2, both of which are even numbers. P1 should be less than P2, and the magnetic gear transmission ratio is i, where i = P2 / P1. The transmission ratio is 0.3 ≤ i ≤ 3. When i is less than 0.3, there is a risk of step loss at high speeds, meaning the driven rotor does not rotate relative to the driving rotor at the original transmission ratio i. When i is greater than 3, the magnetic transmission efficiency is low, meaning the load capacity of the magnetic gears is reduced, and there is still a risk of step loss at high speeds. Therefore, setting the transmission ratio i within the range of 0.3-3 can reduce the risk of step loss at high speeds while ensuring magnetic transmission efficiency and enhancing the load capacity of the magnetic gears. Simultaneously, limiting the relationship between the rotational speeds of the first and second fan blades to 0.3 ≤ n2 / n1 ≤ 3 can improve the internal air velocity and increase the uniformity of airflow.

[0050] Optionally, the transmission ratio i is in the range of 1.1-3. The ratio of n2 / n1 is in the range of 1.1-3.

[0051] In the above technical solution, optionally, the driving rotor and the driven rotor are located on opposite sides of the adjusting magnetic ring, thereby forming radial magnetic gears and thus forming a radial counter-rotating motor. In this case, the length direction of the multiple adjusting magnetic gears is the axial direction of the mounting ring.

[0052] In any of the above technical solutions, optionally, the distance between the adjusting magnetic ring and the driving rotor and / or driven rotor along the length direction of the adjusting magnetic teeth is G, where 0.5mm≤G≤4mm.

[0053] When G is less than 0.5mm, the rotor and the adjusting ring are prone to interference and friction due to installation and machining errors, which will cause noise. When G is greater than 4mm, the magnetic transmission efficiency will be greatly reduced, which will affect the efficiency of the magnetic transmission and cause the driven shaft to lose synchronization.

[0054] Specifically, when radial magnetization occurs, i.e., the driving rotor and driven rotor are arranged along the radial direction of the magnetizing ring, the distance G between the magnetizing ring and the driving rotor and / or driven rotor along the radial direction is greater than or equal to 0.5 mm and less than or equal to 4 mm. Similarly, when axial magnetization occurs, i.e., the driving rotor and driven rotor are arranged along the axial direction of the magnetizing ring, the distance G between the magnetizing ring and the driving rotor and / or driven rotor along the axial direction is greater than or equal to 0.5 mm and less than or equal to 4 mm.

[0055] In the above technical solution, optionally, the driving rotor and the driven rotor can be located on opposite sides of the adjusting magnetic ring in a radial direction, thereby forming a radial magnetic gear. Alternatively, the driving rotor and the driven rotor can be located on opposite sides of the adjusting magnetic ring in an axial direction, thereby forming an axial magnetic gear.

[0056] In this configuration, the magnetization directions of the driving rotor and the driven rotor correspond to each other. If the driving rotor and the driven rotor are radially magnetized, they should form a nested structure with their radial magnetization surfaces facing each other; if the driving rotor and the driven rotor are axially magnetized, their axial magnetization surfaces should face each other.

[0057] In this design, the first and second fan blades are axial flow fans. This allows the airflow generated by the leading blade to swirl and be countered by the other blade, directly generating an axial flow that meets the fan outlet requirements. Therefore, guide vanes are unnecessary, resulting in a simpler, more compact fan structure and significantly reduced axial dimensions.

[0058] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0059] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0060] Figure 1 This is one of the structural schematic diagrams of the fan in the embodiments of the present invention;

[0061] Figure 2 This is one of the structural schematic diagrams of a radially magnetized counter-rotating motor in an embodiment of the present invention;

[0062] Figure 3This is a second schematic diagram of the radially magnetized counter-rotating motor in an embodiment of the present invention;

[0063] Figure 4 This is one of the schematic diagrams of the radially magnetized adjusting ring in the embodiments of the present invention;

[0064] Figure 5 This is a second schematic diagram of the radially magnetized adjusting ring in an embodiment of the present invention;

[0065] Figure 6 This is one of the structural schematic diagrams of an axially magnetized counter-rotating motor in an embodiment of the present invention;

[0066] Figure 7 This is a second schematic diagram of the axially magnetized counter-rotating motor in an embodiment of the present invention;

[0067] Figure 8 This is one of the structural schematic diagrams of the axially magnetized adjusting ring in the embodiments of the present invention;

[0068] Figure 9 This is a second schematic diagram of the axially magnetized adjusting ring in an embodiment of the present invention;

[0069] Figure 10 This is one of the structural schematic diagrams of the radially magnetized active rotor and driven rotor in an embodiment of the present invention;

[0070] Figure 11 This is a second schematic diagram of the radially magnetized active rotor and driven rotor in an embodiment of the present invention;

[0071] Figure 12 This is the third schematic diagram of the radially magnetized active rotor and driven rotor in the embodiments of the present invention;

[0072] Figure 13 This is an assembly diagram of the radially magnetized active rotor and driven rotor in an embodiment of the present invention;

[0073] Figure 14 This is an assembly diagram of the axially magnetized active rotor and driven rotor in an embodiment of the present invention.

[0074] Figure 15 This is one of the assembly diagrams of the first output shaft of the fan in an embodiment of the present invention;

[0075] Figure 16 This is a second assembly schematic diagram of the first output shaft of the fan in an embodiment of the present invention;

[0076] Figure 17 This is a second schematic diagram of the fan structure in an embodiment of the present invention;

[0077] Figure 18 This is the third schematic diagram of the fan structure in an embodiment of the present invention.

[0078] in, Figures 1 to 18 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0079] 10 Magnetic gear, 1 Adjusting magnetic ring, 11 Adjusting magnetic teeth, 12 Magnetic isolation hole, 13 Magnetic isolation groove, 132 Chamfer, 14 Mounting ring, 15 Connecting ring, 2 Driving rotor, 3 Driven rotor, 4 Plate magnet, 5 Circular magnetic guide ring, 20 Drive motor, 202 First output shaft, 2022 First shaft segment, 2024 Second shaft segment, 2026 Third shaft segment, 2028 Fourth shaft segment, 204 Motor body, 30 First fan blade, 40 Second fan blade, 50 Second output shaft, 502 Support sleeve, 504 Mounting part, 60 Mounting bracket, 70 Middle mesh cover, 80 First mesh cover, 90 Second mesh cover. Detailed Implementation

[0080] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0081] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0082] The following reference Figures 1 to 18 The present application describes the fan provided in the embodiments of this application.

[0083] like Figure 1 and Figure 18 As shown, an embodiment of the first aspect of the present invention provides a fan, including a drive motor 20, a magnetic gear 10, a first fan blade 30, and a second fan blade 40.

[0084] The drive motor 20 includes a first output shaft 202. The magnetic gear 10 includes a driving rotor 2, a driven rotor 3, and a magnetic adjusting ring 1. The driving rotor 2 and the driven rotor 3 are located on opposite sides of the magnetic adjusting ring 1, and the driving rotor 2 is mounted on the first output shaft 202, allowing the driven rotor 3 to rotate under the action of the driving rotor 2. A first fan blade 30 is mounted on the first output shaft 202 and can rotate under the action of the first output shaft 202. A second fan blade 40 is connected to the driven rotor 3 and can rotate with the driven rotor 3.

[0085] The fan provided according to an embodiment of the present invention includes a drive motor 20, a magnetic gear 10, a first fan blade 30, and a second fan blade 40. The drive motor 20 and the magnetic gear 10 can be assembled to form a counter-rotating motor. This counter-rotating motor has two output ends with opposite rotation directions, thereby driving two fan blades to rotate in opposite directions. Specifically, the magnetic gear 10 includes a driving rotor 2 mounted on a first output shaft 202 of the drive motor 20, which rotates following the first output shaft 202. The magnetic gear 10 also includes a driven rotor 3 mounted corresponding to the driving rotor 2 and a magnetic adjustment ring 1 disposed between the driving rotor 2 and the driven rotor 3. The magnetic adjustment ring 1 is used to adjust the magnetic circuit between the driving rotor 2 and the driven rotor 3, so that when the driving rotor 2 rotates following the first output shaft 202, the magnetic adjustment ring 1 can drive the driven rotor 3 to rotate in the opposite direction by magnetic force. The first fan blade 30 is mounted on the first output shaft 202 and can rotate with the first output shaft 202. The second fan blade 40 is connected to the driven rotor 3 and can rotate with the driven rotor 3 in the opposite direction to the rotation of the first fan blade 30. This allows the first fan blade 30 and the second fan blade 40 to rotate in opposite directions, thus forming a counter-rotating fan with two fan blades rotating in opposite directions. The rotation centers of the first output shaft 202 and the driven rotor 3 are parallel to each other, ensuring the concentricity of the first output shaft 202 and the driven rotor 3 and improving the stability of the motor system.

[0086] Optionally, the first output shaft 202 and the driven rotor 3 are arranged coaxially.

[0087] When the driven rotor 3 rotates under the action of the driving rotor 2, the rotation direction of the driven rotor 3 is opposite to the rotation direction of the driving rotor 2. This makes the rotation directions of the first blade 30 and the second blade 40 also opposite.

[0088] This type of fan, featuring two blades rotating in different directions, can output a gentle, comfortable, and varied airflow. Furthermore, the interaction between the two blades reduces noise. Since it requires only one motor, it not only lowers the fan's cost but also simplifies its structure and reduces its size. Additionally, thanks to the use of a magnetic gear 10, this fan offers advantages such as zero mechanical friction, low vibration, low noise, and overload protection.

[0089] In this design, the first blade 30 and the second blade 40 are axial flow fans. This allows the airflow generated by the leading blade (30) to be reversed and eliminated by the other blade, directly generating an axial flow that meets the fan outlet requirements. Therefore, guide vanes are unnecessary, resulting in a simpler, more compact fan structure and significantly reduced axial dimensions.

[0090] Furthermore, this structure allows for different airflow modes by adjusting the speed ratio between the active rotor 2 and the driven rotor 3. For example, when the front-to-rear blade speed ratio is 1:2, the front blades further disperse the airflow from the rear blades, resulting in a very gentle breeze. When the front-to-rear blade speed ratio is 2:1, the rear blades propel the front blades, creating a powerful, pressurized airflow, which is highly effective for indoor ventilation. When the front-to-rear blade speed ratio is 1:1, both blades simultaneously agitate the air, achieving a large volume of circulating airflow. At this point, 360° rotation in all directions fully realizes the function of a circulating fan, and when used with an air conditioner, it can create a more even indoor temperature.

[0091] The first fan blade 30 is located in front of the second fan blade 40, meaning the first fan blade 30 is designed to be closer to the air outlet side of the fan.

[0092] Optionally, in any of the above technical solutions, the fan also includes a control module electrically connected to the drive motor 20. When the control module adjusts the speed of the first fan blade 30, the speed of the second fan blade 40 can be adjusted synchronously.

[0093] In any of the above embodiments, optionally, as Figure 1 , Figure 2 and Figure 3 As shown, the driven rotor 3 includes: a second output shaft 50, which is mounted on the first output shaft 202 and can rotate relative to the first output shaft 202; a second fan blade 40 is mounted on the second output shaft 50; when the first output shaft 202 rotates, the second output shaft 50 can rotate in the opposite direction relative to the first output shaft 202.

[0094] In this embodiment, the second output shaft 50 is used to output power to the driven rotor 3. Thus, when the driven rotor 3 rotates, the second output shaft 50 drives the second fan blade 40 to rotate. In other words, the second output shaft 50 serves to connect the driven rotor 3 and the second fan blade 40. This design, by providing the second output shaft 50, facilitates the installation of the second fan blade 40, thereby optimizing the overall fan structure. Simultaneously, the second output shaft 50 is supported and mounted on the first output shaft 202, further facilitating its installation.

[0095] In any of the above embodiments, optionally, as Figure 1 , Figure 2 and Figure 3As shown, the drive motor 20 also includes a motor body 204, at least a portion of the first output shaft 202 is installed in the motor body 204, and the first output shaft 202 includes a first output end and a second output end that extend from opposite sides of the motor body 204 respectively; the first fan blade 30 is installed on the first output end, and the second output shaft 50 and the drive rotor 2 are installed on the second output end.

[0096] In this embodiment, the two ends of the first output shaft 202 extend from both sides of the motor body 204, thus forming two output ends. One output end is used to install the first fan blade 30, and the other output end is used to install the drive rotor 2 and the second output shaft 50. This design allows the first fan blade 30 and the second fan blade 40 to be positioned at both ends of the motor body 204, thereby making the overall fan structure more stable.

[0097] In any of the above embodiments, optionally, as Figure 18 As shown, the drive motor 20 also includes a motor body 204, at least a portion of the first output shaft 202 is installed inside the motor body 204, and the first output shaft 202 includes a third output end extending from one side of the motor body 204; a first fan blade 30 is installed on the third output end, at least a portion of the second output shaft 50 is installed on the outside of the third output end; at least a portion of the second fan blade 40 is disposed radially outside the first fan blade 30.

[0098] In this embodiment, one end of the first output shaft 202 extends from one side of the motor body 204 to form a third output end. The first fan blade 30 is mounted on the third output end, and at least a portion of the second output shaft 50 is mounted on the outer side of the third output end. This allows the first fan blade 30 and the second fan blade 40 to be mounted on the same side of the motor body 204, thereby increasing the airflow. Simultaneously, the fact that at least a portion of the second fan blade 40 is located radially outward of the first fan blade 30 can increase the internal airflow velocity and improve the uniformity of airflow.

[0099] In any of the above embodiments, optionally, the rotational speed of the second blade 40 is less than the rotational speed of the first blade 30.

[0100] In this embodiment, setting the rotational speed of the second fan blade 40 to be lower than that of the first fan blade 30 can increase the internal wind speed and improve the uniformity of airflow.

[0101] In any of the above embodiments, optionally, as Figure 2 As shown, the fan also includes one or more bearings mounted on the first output shaft 202, and the second output shaft 50 is provided with a rotating hole, the second output shaft 50 being sleeved and mounted on at least one bearing through the rotating hole.

[0102] In this embodiment, the second output shaft 50 has a hollow structure, forming a rotation hole. One or more bearings are disposed between the second output shaft 50 and the first output shaft 202. These bearings allow the second output shaft 50 to be mounted on the first output shaft 202, enabling the second output shaft 50 to rotate relative to the first output shaft 202. This achieves the rotatable mounting of the second output shaft 50 on the first output shaft 202. Furthermore, this structure, where the second output shaft 50 is supported and mounted on the first output shaft 202, ensures the concentricity of the first and second output shafts, improving the stability of the motor system and facilitating the installation of the second output shaft 50.

[0103] In any of the above embodiments, optionally, as Figure 3 As shown, the second output shaft 50 includes: a support sleeve 502, which is supported and mounted on the first output shaft 202 and can rotate relative to the first output shaft 202; a mounting part 504, which is connected to the support sleeve 502; at least a portion of the active rotor 2 and the mounting part 504 are respectively located on opposite sides of the magnetic ring 1; and the driven rotor 3 is mounted on the mounting part 504 at a position corresponding to the active rotor 2.

[0104] In this embodiment, the second output shaft 50 comprises two parts. One part is a support sleeve 502, which is similar to a bushing and is used to fit and mount on the first output shaft 202. The other part is used to mount the driven rotor 3, so that the driven rotor 3 and the driving rotor 2 can be arranged on opposite sides of the adjusting ring 1. The support sleeve 502 and the mounting part 504 are integral structures, which ensures the connection strength between the two.

[0105] In any of the above embodiments, optionally, the fan further includes: a mounting bracket 60, on which the drive motor 20 and the adjusting magnetic ring 1 are both mounted; the drive motor 20 further includes a motor body 204, at least a portion of the first output shaft 202 is mounted inside the motor body 204, and at least a portion of the first output shaft 202 extends out from the motor body 204; wherein the motor body 204 and the magnetic gear 10 are located on the same side of the mounting bracket 60, or the motor body 204 and the magnetic gear 10 are located on opposite sides of the mounting bracket 60.

[0106] In this embodiment, the mounting bracket 60 forms a mounting platform for mounting components such as the drive motor 20 and the adjusting magnetic ring 1. The motor body 204 and the magnetic gear 10 can be mounted on the same side of the mounting bracket 60. Alternatively, the motor body 204 and the magnetic gear 10 can be mounted on opposite sides of the mounting bracket 60, thus simplifying the overall fan structure.

[0107] In any of the above embodiments, optionally, as Figure 15 and Figure 16 As shown, the first output shaft 202 includes a first shaft segment 2022, a second shaft segment 2024, and a third shaft segment 2026 connected in sequence, with the diameters of the first shaft segment 2022, the second shaft segment 2024, and the third shaft segment 2026 increasing sequentially; wherein, the driving rotor 2 is mounted on the second shaft segment 2024, the second output shaft 50 is mounted on the first shaft segment 2022, and the third shaft segment 2026 is located inside the motor body 204.

[0108] In this embodiment, the first output shaft 202 of the motor is a single-piece structure, which may comprise three parts according to their diameter: a first shaft segment 2022, a second shaft segment 2024, and a third shaft segment 2026. The driving rotor 2 is mounted on the second shaft segment 2024, the second output shaft 50 is mounted on the first shaft segment 2022, and the third shaft segment 2026 is located within the motor body 204. The different diameters of the various parts facilitate the assembly of components such as the motor, rotor, and bearings, and the different diameter segments form a stepped section. This stepped section serves to axially limit the movement of the assembled parts.

[0109] In any of the above embodiments, optionally, as shown... Figure 15 and Figure 16 As shown, the first output shaft 202 also includes a fourth shaft segment 2028, which is connected to the third shaft segment 2026 on the side away from the second shaft segment 2024 and extends from the side of the motor body 204 away from the second shaft segment 2024. The fourth shaft segment 2028 is used to mount the first fan blade 30.

[0110] In this embodiment, the first output shaft 202 further includes a fourth shaft segment 2028. The fourth shaft segment 2028 is used to mount the first fan blade 30. The diameter of the fourth shaft segment 2028 may be greater than or equal to the diameter of the third shaft segment 2026, or it may be smaller than the diameter of the third shaft segment 2026.

[0111] In any of the above embodiments, optionally, the difference between the diameter of the second shaft segment 2024 and the diameter of the first shaft segment 2022 is greater than or equal to 0.5 mm and less than or equal to 2 mm, and / or the difference between the diameter of the third shaft segment 2026 and the diameter of the second shaft segment 2024 is greater than or equal to 0.5 mm and less than or equal to 2 mm.

[0112] In this embodiment, the three diameters of the shaft are D1, D2, and D3, where D1 < D2 < D3, and 0.5mm ≤ D2 - D1 ≤ 2mm. When D2 - D1 < 0.5mm, the machining is difficult, and the small diameter difference results in an excessively small step on the shaft, affecting its axial limiting function. When D2 - D1 > 2mm, the machining difficulty increases, leading to increased machining costs. Similarly, 0.5mm ≤ D3 - D2 ≤ 2mm. When D3 - D2 < 0.5mm, the machining is difficult, and the small diameter difference results in an excessively small step on the bearing, affecting its axial limiting function. When D3 - D2 > 2mm, the machining difficulty increases, leading to increased machining costs.

[0113] In any of the above embodiments, optionally, as Figure 1 and Figure 17 As shown, the fan also includes: a middle grille 70, on which the drive motor 20 is mounted; a first grille 80 and a second grille 90, which are respectively fixed on both sides of the middle grille 70 along the axial direction of the first output shaft 202; wherein, the first fan blade 30 is installed in the space enclosed by the first grille 80 and the middle grille 70, and the magnetic gear 10 and the second fan blade 40 are installed in the space enclosed by the second grille 90 and the middle grille 70.

[0114] In this embodiment, the central mesh cover 70 serves two purposes: ventilation and installation of the drive motor 20 and magnetic gear 10. Simultaneously, this design creates an air duct between the second fan blade 40 and the first fan blade 30, allowing air blown out by the first fan blade 30 to pass through the second fan blade 40 and then be blown out by the second fan blade 40.

[0115] In any of the above embodiments, optionally, as Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, the adjusting ring 1 includes: a mounting ring 14; and multiple adjusting teeth 11, along the first circumferential direction (e.g., Figure 4 and Figure 8 The magnetic teeth 11 are spaced apart on the mounting ring 14 in the Z direction, and a magnetic isolation hole 12 is formed between two adjacent magnetic adjustment teeth 11. The mounting ring 14 is located at one end of the plurality of magnetic adjustment teeth 11 along the length direction. A connecting ring 15 is connected to the end of the plurality of magnetic adjustment teeth 11 away from the mounting ring 14, and the connecting ring 15 and the mounting ring 14 are spaced apart along the length direction. Further, as Figure 4 , Figure 8 and Figure 9 As shown, magnetic isolation grooves 13 are provided on one or both ends of the magnetic adjustment tooth 11 along its length.

[0116] In this embodiment, the adjusting ring 1 includes a mounting ring 14 and multiple adjusting teeth 11. Magnetic isolation holes 12 are formed between the multiple adjusting teeth 11. The adjusting teeth 11 are magnetically conductive, guiding the magnetic circuit between the driven rotor 3 and the driving rotor 2, thereby enabling the driven rotor 3 and the driving rotor 2 to rotate in opposite directions. Furthermore, the mounting ring 14 is located at one end of the multiple adjusting teeth 11 along their length; that is, the mounting ring 14 only connects one end of the multiple adjusting teeth 11 along their length, meaning that most of the area along the length of the multiple adjusting teeth 11 is unconnected. This creates relatively large magnetic isolation holes 12 between the multiple adjusting teeth 11, effectively preventing magnetic leakage and improving the magnetic moment transmission effect between the driven rotor 3 and the driving rotor 2. Thus, when the adjusting ring 1 is used in the magnetic gear 10, it can improve the load capacity of the magnetic gear 10 and reduce the risk of the magnetic gear 10 losing synchronization.

[0117] Furthermore, by setting the magnetic isolation groove 13, the magnetic leakage at both ends of the adjusting gear 11 arranged radially can be reduced, thereby further improving the magnetic moment transmission effect between the driven rotor 3 and the driving rotor 2. Thus, when the adjusting ring 1 is used for the magnetic gear 10, the load capacity of the magnetic gear 10 can be further improved, and the risk of the magnetic gear 10 losing synchronization can be reduced.

[0118] At the same time, such as Figure 5 As shown, since the magnetic isolation groove 13 is located relatively close to the end, the structure of the magnetic adjustment ring 1 at the end is relatively weak. Therefore, in order to increase the wall thickness of the magnetic adjustment tooth 11 at the end, a chamfer 132 can be provided at the connection of the two sides of the magnetic isolation groove 13 near the end. This can appropriately increase the thickness of the magnetic isolation groove 13 near the end, thereby improving the structural strength of the magnetic adjustment ring 1.

[0119] Optionally, such as Figure 4 As shown, multiple adjusting teeth 11 are arranged along the axial direction of the mounting ring 14, and the mounting ring 14 and the connecting ring 15 are spaced apart along the axial direction of the mounting ring 14, or as shown in the figure. Figure 8 As shown, multiple magnetic adjustment teeth 11 are arranged radially along the inner side of the mounting ring 14, and the mounting ring 14 and the connecting ring 15 are arranged at intervals along the radial direction of the mounting ring.

[0120] Furthermore, since the mounting ring 14 has a hollow structure in the middle, leakage of magnetic field through the mounting ring 14 can be further prevented.

[0121] Furthermore, the two ends of the multiple adjusting teeth 11 along their length are connected by mounting rings 14 and connecting rings 15, respectively. This ensures the strength of the adjusting ring 1 and prevents deformation of the adjusting teeth 11 during operation. Simultaneously, this structure, through the mounting rings 14 and connecting rings 15, simplifies the structure of the adjusting ring 1 and improves its magnetic shielding effect, preventing magnetic leakage due to the mounting structure at both ends.

[0122] In any of the above embodiments, optionally, as Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, the magnetic adjustment tooth 11 includes two ends arranged along the length direction, and the magnetic isolation groove 13 is provided with a chamfer 132. The chamfer 132 is provided on one side of the magnetic isolation groove 13 near the end. The magnetic isolation groove 13 is provided with a chamfer 132 at one or both ends distributed along the first circumferential direction.

[0123] In this embodiment, since the magnetic isolation groove 13 is located relatively close to the end, the structure of the magnetic adjustment ring 1 at the end is relatively weak. Therefore, in order to increase the wall thickness of the magnetic adjustment tooth 11 at the end, a chamfer 132 can be provided at the connection of the two sides of the magnetic isolation groove 13 near the end. This can appropriately increase the thickness of the magnetic isolation groove 13 near the end, thereby improving the structural strength of the magnetic adjustment ring 1.

[0124] Furthermore, the magnetic shielding groove 13 is provided with a chamfer 132 at one or both ends along the first circumferential direction. That is, the magnetic shielding groove 13 can be provided with only one chamfer 132 on the side near the end for single-sided structural reinforcement, or two chamfers 132 can be provided for double-sided structural reinforcement.

[0125] In any of the above embodiments, optionally, the number of poles of the driving rotor 2 is P1, and the number of poles of the driven rotor 3 is P2, wherein: P1 and P2 are both even numbers, and P1 is less than P2, and / or 0.3≤P2 / P1≤3; and / or the rotational speed of the first fan blade 30 is n1, the rotational speed of the second fan blade 40 is n2, and 0.3≤n2 / n1≤3.

[0126] In this embodiment, the number of poles of the driving rotor 2 is P1, and the number of poles of the driven rotor 3 is P2, both of which are even numbers. P1 should be less than P2, and the transmission ratio of the magnetic gear 10 is i, where i = P2 / P1. The transmission ratio is 0.3 ≤ i ≤ 3. When i is less than 0.3, there is a risk of step loss at high speeds, meaning the driven rotor 3 does not rotate relative to the driving rotor 2 with the original transmission ratio i. When i is greater than 3, the magnetic transmission efficiency is low, meaning the load capacity of the magnetic gear 10 is reduced, and there is still a risk of step loss at high speeds. Therefore, setting the transmission ratio i in the range of 0.3-3 can reduce the risk of step loss at high speeds while ensuring magnetic transmission efficiency and enhancing the load capacity of the magnetic gear 10. Simultaneously, limiting the relationship between the rotational speed of the first fan blade 30 and the rotational speed of the second fan blade 40 to 0.3 ≤ n2 / n1 ≤ 3 can improve the internal air velocity and increase the uniformity of airflow.

[0127] Optionally, the transmission ratio i is in the range of 1.1-3. The ratio of n2 / n1 is in the range of 1.1-3.

[0128] In any of the above embodiments, optionally, the distance between the adjusting magnetic ring 1 and the driving rotor 2 and / or the driven rotor 3 along the length direction is G, wherein 0.5mm≤G≤4mm.

[0129] When G is less than 0.5mm, the rotor and the adjusting ring 1 are prone to interference and friction due to installation and machining errors, which will cause noise. When G is greater than 4mm, the magnetic transmission efficiency will be greatly reduced, which will affect the efficiency of the magnetic transmission and cause the driven shaft to lose synchronization.

[0130] Wherein, when radial magnetization occurs, i.e., the driving rotor 2 and the driven rotor 3 are arranged along the radial direction of the adjusting ring 1, the distance G between the adjusting ring 1 and the driving rotor 2 and / or the driven rotor 3 along the radial direction (this dimension can be specifically defined as follows) Figure 2 In the middle, the adjusting magnetic ring 1 is aligned with the driving rotor 2 and / or the driven rotor 3 along... Figure 2 The radial spacing shown is greater than or equal to 0.5 mm and less than or equal to 4 mm. Specifically, when axially magnetized, i.e., when the driving rotor 2 and driven rotor 3 are arranged along the axial direction of the adjusting ring 1, the distance G between the adjusting ring 1 and the driving rotor 2 and / or driven rotor 3 along the axial direction (this dimension can be specifically...) Figure 6 In the middle, the adjusting magnetic ring 1 is aligned with the driving rotor 2 and / or the driven rotor 3 along... Figure 6 The axial spacing shown is greater than or equal to 0.5 mm and less than or equal to 4 mm.

[0131] In the above embodiments, optionally, as shown... Figure 2 and Figure 13 As shown, the driving rotor 2 and the driven rotor 3 are located radially from the magnetic ring 1 (e.g., Figure 2 The radial magnetic gears 10 are formed by the two sides (as shown in the diagram) being positioned opposite each other, thereby forming a radial counter-rotating motor. At this time, the length direction of the plurality of adjusting magnetic teeth 11 is the axial direction of the mounting ring 14.

[0132] In the above embodiments, optionally, as shown... Figure 6 and Figure 14 As shown, the driving rotor 2 and the driven rotor 3 can also be located along the axial direction of the adjusting ring 1 (e.g., Figure 6 The two sides (as shown in the diagram) are arranged opposite each other to form an axial magnetic gear 10.

[0133] The magnetization directions of the driving rotor 2 and the driven rotor 3 correspond to each other. If the driving rotor 2 and the driven rotor 3 are radially magnetized, the driving rotor 2 and the driven rotor 3 should form a nested structure, with the radial magnetization surfaces of the driving rotor 2 and the driven rotor 3 facing each other; if the driving rotor 2 and the driven rotor 3 are axially magnetized, the axial magnetization surfaces of the driving rotor 2 and the driven rotor 3 should face each other.

[0134] In this design, the first blade 30 and the second blade 40 are axial flow fans. This allows the airflow generated by the leading blade (30) to be reversed and eliminated by the other blade, directly generating an axial flow that meets the fan outlet requirements. Therefore, guide vanes are unnecessary, resulting in a simpler, more compact fan structure and significantly reduced axial dimensions.

[0135] In the above embodiments, optionally, the magnetic ring 1 further includes a reinforcing structure, which is disposed on one side of the magnetic isolation groove 13 near the end. The magnetic isolation groove 13 is provided with a reinforcing structure at one or both ends distributed along the first circumferential direction.

[0136] In this embodiment, a reinforcing structure can be provided near the magnetic isolation groove 13 to increase the structural strength of the magnetic guide teeth. Specifically, a reinforcing structure can be provided at each of the left and right ends of the magnetic isolation groove 13 near its end to enhance the overall structural strength of the magnetic adjustment ring 1.

[0137] In one specific design, a chamfer 132 and a reinforcing structure are provided at the magnetic isolation groove 13, so that the structural strength of the magnetic ring 1 can be doubled through the chamfer 132 and the reinforcing structure.

[0138] In the above embodiment, optionally, the diameter of the chamfer 132 is v, where 0.3mm ≤ v ≤ 2mm. When v is less than 0.3mm, the area of ​​the chamfer 132 is small and cannot reinforce the magnetic bridge; when v is greater than 2mm, the area of ​​the chamfer 132 is large, resulting in greater magnetic leakage at the magnetic bridge and reducing the magnetic transmission efficiency.

[0139] In the above embodiments, optionally, as shown... Figure 2 and Figure 4 As shown, the inner diameter of the mounting ring 14 is Z, the inner diameter of the adjusting magnetic ring 1 is V, Z = V, and / or, the outer diameter of the mounting ring 14 is Y, the outer diameter of the adjusting magnetic ring 1 is X, 6mm ≤ YX ≤ 20mm, and / or, the thickness of the mounting ring 14 is h1, 0.5mm ≤ h1 ≤ 3mm; and / or, the outer diameter of the connecting ring 15 is A, the outer diameter of the adjusting magnetic ring 1 is X, A = X, and / or, the inner diameter of the connecting ring 15 is C, the inner diameter of the adjusting magnetic ring 1 is V, 1mm ≤ VC ≤ 6mm, and / or, the thickness of the connecting ring 15 is h2, 0.5mm ≤ h2 ≤ 3mm.

[0140] In this embodiment, when YX is less than 6mm, the width of the mounting ring 14 is too small, and its reinforcing effect is minimal, failing to provide a stable connection between the magnetic adjusting ring 1 and the mounting bracket 60. When YX is greater than 20mm, it occupies too much radial space, resulting in wasted space. When h1 is less than 0.5mm, the strength of the mounting ring 14 is low, easily causing deformation and swaying. When h1 is greater than 3mm, it results in wasted axial space. When VC is less than 1mm, the width of the connecting ring 15 is too small, failing to provide reinforcement. When VC is greater than 6mm, the width of the connecting ring 15 is too large, easily increasing magnetic leakage and reducing magnetic transmission efficiency. When h2 is less than 0.5mm, the structural strength of the connecting ring 15 is low, and the magnetic adjusting ring 1 is prone to deformation and swaying, causing mechanical friction; when h2 is greater than 3mm, increased magnetic leakage results in low magnetic transmission efficiency and wastes axial space.

[0141] In the above embodiments, optionally, the connecting ring 15 and the plurality of adjusting teeth 11 are connected by welding or by adhesive. That is, the connecting ring 15 and the plurality of adjusting teeth 11 are separately machined parts, and the two are connected later.

[0142] In the above embodiments, the adjusting magnetic ring 1 may optionally be a metal magnetic ring or a non-metal magnetic ring. This application does not specifically limit the material of the adjusting magnetic ring 1, as long as it is magnetically conductive. Therefore, the adjusting magnetic ring 1 can be set as a metal magnetic ring or a non-metal magnetic ring according to actual conditions.

[0143] Among them, the connecting ring 15, the mounting ring 14 and the adjusting teeth 11 are integral structures or integral molded structures, which facilitates the processing of the adjusting ring 1 and also makes the entire adjusting ring 1 have a better magnetic shielding effect.

[0144] In the above embodiments, optionally, the magnetic ring 1 further includes a filler, disposed in the magnetic isolation hole 12, wherein the filler is a non-magnetic component.

[0145] In this embodiment, a filler with a better magnetic shielding effect than air can be added to the magnetic shielding hole 12 to enhance the magnetic shielding effect of the magnetic adjusting ring 1. Of course, no material can be placed in the magnetic shielding hole 12, in which case magnetic shielding can be achieved by air.

[0146] In the above embodiments, optionally, the mounting ring 14 is circular, and the length direction of the plurality of adjusting teeth 11 is the radial direction of the mounting ring 14, or the length direction of the plurality of adjusting teeth 11 is the axial direction of the mounting ring 14.

[0147] In the above embodiments, optionally, the adjusting magnetic ring 1 is used for a counter-rotating motor, which includes a driving rotor 2 and a driven rotor 3. The adjusting magnetic ring 1 is located between the driving rotor 2 and the driven rotor 3. The number of magnetic isolation holes 12 is Q, where Q = (P1 + P2) / 2, where P1 is the number of poles of the driving rotor 2 and P2 is the number of poles of the driven rotor 3.

[0148] In the above embodiments, optionally, the adjusting ring 1 is a soft magnetic adjusting ring, that is, an adjusting ring 1 made of soft magnetic material. The soft magnetic material is a magnetic material with low coercivity and high permeability. Soft magnetic materials are easy to magnetize and demagnetize, and have a narrow and steep hysteresis loop, a nearly reversible magnetization process, low hysteresis loss, high permeability, and low coercivity.

[0149] In the above embodiments, optionally, as shown... Figure 4 , Figure 8 and Figure 9 As shown, the thickness of the adjusting magnetic ring 1 is B, where 0.5mm ≤ B ≤ 3mm. When B is less than 0.5mm, the adjusting magnetic ring 1 is too thin, its strength is too low, and it is prone to wobbling during operation, generating mechanical friction and noise when in contact with the magnetic ring; when B is greater than 3mm, the adjusting magnetic ring 1 has greater losses and occupies a larger air gap space between the magnetic rings, reducing the magnetic transmission efficiency.

[0150] The thickness of the adjusting ring 1 is generally the dimension of the adjusting ring 1 in the direction perpendicular to the length of the adjusting tooth 11. For example, as... Figure 8 As shown, when the mounting ring 14 and the connecting ring 15 are arranged radially at intervals, the thickness B of the adjusting ring 1 is a dimension along the axial direction of the mounting ring 14. Figure 4 As shown, when the mounting ring 14 and the connecting ring 15 are spaced apart along the axial direction, the thickness B of the adjusting ring 1 (specifically...) Figure 4 The thickness between the outer diameter and the inner diameter of the adjusting magnetic ring 1 is the radial dimension along the mounting ring 14.

[0151] In the above embodiments, the magnetic isolation groove 13 may optionally include at least one of rectangular, circular, elliptical, triangular, and polygonal shapes. The purpose of the magnetic isolation groove 13 is to enable the effective magnetic conduction area of ​​the magnetic adjustment ring 1 to reasonably transmit the magnetic circuit, reduce magnetic leakage, and improve magnetic transmission efficiency.

[0152] In the above embodiments, optionally, as shown... Figures 2 to 4 As shown, mounting ring 14 and connecting ring 15 are spaced apart along the axial direction of mounting ring 14. Adjusting magnetic ring 1 is used for a counter-rotating motor. The counter-rotating motor includes two rotors, with adjusting magnetic ring 1 located between the two rotors, and the two rotors respectively located on both sides of adjusting magnetic ring 1 in the radial direction. The length of the driving rotor 2 or driven rotor 3 in the longitudinal direction is H (specifically...). Figure 2 In the first output shaft 202, the length of the driving rotor 2 or driven rotor 3 along the axial direction is J, and the length of the adjusting magnetic ring 1 along the length direction is J (e.g., Figure 4As shown), 1≤J / H≤1.5. When J / H is less than 1, the axial length of the adjusting magnetic ring 1 is less than the axial length of the magnetic ring, resulting in more magnetic leakage and reducing the magnetic transmission efficiency; when J / H is greater than 1.5, the axial length of the adjusting magnetic ring 1 is too large, resulting in waste of the material of the adjusting magnetic ring 1 and occupying axial space, causing the axial volume of the product to increase.

[0153] In the above embodiments, optionally, as shown... Figure 2 and Figure 3 As shown, the outer diameter of the rotor located inside the magnetic ring 1 in the radial direction is D2 (specifically, it can be...). Figure 2 The outer ring length of the active rotor 2 along the radial direction of the first output shaft 202), and the inner diameter of the adjusting magnetic ring 1 is V (e.g., Figure 4 As shown), 1mm≤V-D2≤4mm. When V-D2 is less than 1mm, the adjusting magnetic ring 1 is prone to mechanical friction with the magnetic ring due to installation errors and structural misalignment. When V-D2 is greater than 4mm, the air gap length between the magnetic ring (i.e., the driving rotor 2 or the driven rotor 3) and the adjusting magnetic ring 1 is too large, resulting in excessive magnetic resistance and reduced magnetic transmission efficiency.

[0154] In the above embodiments, optionally, as shown... Figure 4 As shown, the inner diameter of the rotor located on the outer side of the adjusting ring 1 in the radial direction is W (specifically, it can be...). Figure 2 The outer diameter of the driven rotor 3 along the radial direction of the first output shaft 202 is X, and the outer diameter of the adjusting magnetic ring 1 is X, where 1mm ≤ WX ≤ 4mm. When WX is less than 1mm, the adjusting magnetic ring 1 is prone to mechanical friction with the magnetic ring due to installation errors and structural misalignment. When WX is greater than 4mm, the air gap length between the magnetic ring and the adjusting magnetic ring 1 is too large. Due to the low permeability of air, the magnetic resistance is too large, reducing the magnetic transmission efficiency.

[0155] In the above embodiments, optionally, as shown... Figure 4 As shown, the length of the adjusting magnetic ring 1 along the longitudinal direction is J, and the length of the magnetic isolation hole 12 along the longitudinal direction is K, where 1mm ≤ JK ≤ 4mm. When JK is greater than 4mm, the axial length of the magnetic isolation groove 13 is too small, failing to isolate the magnetic circuit, and the excessively wide magnetic bridge increases magnetic leakage, reducing magnetic transmission efficiency. When JK is less than 1mm, the width of the connection between the two sides of the magnetic isolation groove 13 along the axial direction is too small, resulting in insufficient strength and easy deformation, causing mechanical friction between the adjusting magnetic ring 1 and the magnetic ring, generating noise.

[0156] In the above embodiments, optionally, as shown... Figure 2 and Figure 4As shown, the circumferential angle corresponding to the magnetic isolation hole 12 along the first circumferential direction is q, 100° / Q≤q≤260° / Q, where Q is the number of magnetic isolation holes 12. The maximum circumferential angle corresponding to the magnetic isolation hole 12 is q, 100° / Q≤q≤260° / Q. When q is less than 100° / Q, the width of the magnetic isolation hole 12 is too small, the magnetic isolation effect is poor, and the effect of the adjusting ring 1 on the magnetic circuit is not obvious; when q is greater than 260° / Q, the width of the magnetic isolation hole 12 is too large, causing the width of the adjusting tooth 11 to be too small, which easily leads to magnetic saturation of the adjusting tooth 11, and a decrease in the magnetic adjustment effect and magnetic transmission efficiency; the length of the adjusting ring 1 along the length direction is J, and the length of the adjusting tooth 11 along the length direction is L; where 0.6≤L / J≤0.9. When L / J is less than 0.6, the axial length of the adjusting tooth 11 is too small, that is, the effective magnetic conduction area is too small, which can easily cause magnetic saturation of the adjusting tooth 11 and increase magnetic leakage, thus affecting the magnetic field modulation effect. When L / J is greater than 0.9, the axial length of the adjusting tooth 11 is too large, the width of the magnetic isolation hole 12 and the magnetic isolation bridges on both sides is too small, the magnetic isolation effect is poor, the magnetic leakage increases, and the magnetic transmission efficiency and magnetic field modulation effect are affected.

[0157] In the above embodiments, optionally, as shown... Figure 6 and Figure 8 As shown, the adjusting ring 1 is used in a counter-rotating motor. The counter-rotating motor includes two rotors. The adjusting ring 1 is located between the two rotors, and the two rotors are located on both sides of the adjusting ring 1 along the axial direction. The adjusting ring 1 and the rotors are both circular. The inner diameter of the adjusting ring 1 is M, the outer diameter of the adjusting ring 1 is O, the inner diameter of the rotor is E, and the outer diameter of the rotor is F. Wherein, 0.3≤M / E≤0.9, and / or 1≤O / F≤1.5.

[0158] When M / E is greater than 0.9, the inner diameter of the adjusting magnetic ring 1 is close to the inner diameter of the rotor, resulting in more magnetic leakage and reducing magnetic transmission efficiency. When M / E is less than 0.3, the inner diameter of the adjusting magnetic ring 1 is too small, resulting in waste of the magnetic conductive material of the adjusting magnetic ring 1. When O / F is less than 1, the outer diameter of the adjusting magnetic ring 1 is smaller than the outer diameter of the rotor, resulting in more magnetic leakage and reducing magnetic transmission efficiency. When O / F is greater than 1.5, the outer diameter of the adjusting magnetic ring 1 is too large, resulting in waste of material and occupying radial space.

[0159] In the above embodiments, optionally, as shown... Figure 8 and Figure 9 As shown, the length of the magnetic isolation hole 12 along the longitudinal direction is P, where 1mm ≤ (OM) / 2 - P ≤ 4mm. When (OM) / 2 - P is less than 1mm, the width and strength of the magnetic isolation bridge at the connection between the two sides of the magnetic isolation groove 13 are too small, which can easily cause deformation of the magnetic adjustment ring 1 structure and interference friction noise with the magnetic ring; when (OM) / 2 - P is greater than 4mm, the width of the magnetic isolation bridge is too large, which increases magnetic leakage and reduces magnetic transmission efficiency.

[0160] In the above embodiments, optionally, as shown... Figure 8 and Figure 9 As shown, the length of the adjusting tooth 11 along the longitudinal direction is S, where 0.6 ≤ S / (OM) / 2 ≤ 0.9. When S / (OM) / 2 is less than 0.6, the radial length of the adjusting tooth 11 is too small, which can easily cause magnetic saturation of the adjusting tooth 11 and affect the magnetic adjustment effect; when S / (OM) / 2 is greater than 0.9, the radial length of the magnetic isolation hole 12 is too small, the magnetic isolation effect is poor, which can easily cause magnetic leakage and affect the magnetic transmission efficiency and the magnetic adjustment effect.

[0161] In the above embodiments, optionally, as shown... Figure 6 and Figure 7 As shown, the driven rotor 3 and the driving rotor 2 are located on both sides of the adjusting ring 1 along the axial direction. Wherein, as... Figure 10 and Figure 11 As shown, the inner diameter of the driven rotor 3 and / or the driving rotor 2 is E, and the outer diameter of the driven rotor 3 and / or the driving rotor 2 is F, where 0.4 ≤ E / F ≤ 0.7. When E / F is less than 0.4, the rotor inner hole is small and the radial thickness is large, resulting in a waste of permanent magnet material or magnetic conductive material. When E / F is greater than 0.7, the rotor radial thickness is thin, the structure is fragile, the processing is more difficult, and the magnetic properties of the magnetic ring are lower.

[0162] Among them, such as Figure 6 As shown, the inner diameter of the driven rotor 3 is E1, and the outer diameter is F1, as follows: Figure 6 As shown, the inner diameter of the active rotor 2 is E2, and the outer diameter is F2.

[0163] In the above embodiments, optionally, as shown... Figure 2 and Figure 3 As shown, the driven rotor 3 and the driving rotor 2 are located on both sides of the adjusting ring 1 along the radial direction. The ratio between the outer diameter of the driven rotor 3 and / or the driving rotor 2 and its axial height H is greater than or equal to 0.5 and less than or equal to 5. Specifically, the axial height of the driving rotor 2 is H2 (e.g., ...). Figure 2 As shown), the axial height of the driven rotor 3 is H1 (as shown). Figure 2 (As shown).

[0164] In this embodiment, the magnetic ring is radially magnetized, and the magnetized surface of the rotor should be the radial curved surface of the annular magnetic ring, i.e., the rotor is a cylinder. The ratio between the outer diameter of the rotor and the height H of the rotor is greater than or equal to 0.5 and less than or equal to 5. When the volume of the magnetic ring is constant, if D / H is less than 0.5, the magnetic ring becomes a thin, elongated rod shape, which is difficult to process, the magnetic ring is easily broken, and the magnetic performance is reduced due to the small thickness of the magnetic ring. If D / H is greater than 5, the rotor becomes a thin sheet shape, the magnetized surface area of ​​the magnetic ring is too small, and the magnetic performance of the magnetic ring is reduced.

[0165] In the above embodiments, optionally, as shown... Figure 10 and Figure 13As shown, the inner diameter of the rotor (i.e., the driven rotor 3) located on the outer side of the adjusting magnetic ring 1 in the radial direction is D1, and the outer diameter of the rotor (i.e., the driving rotor 2) located on the inner side of the adjusting magnetic ring 1 in the radial direction is D2. The thickness of the adjusting magnetic ring 1 is B, where 2mm ≤ ((D1-D2) / 2)-B ≤ 8mm. When (D1-D2) / 2-B is less than 2mm, the rotor and the adjusting magnetic ring 1 are prone to friction and noise due to assembly errors or runout; when (D1-D2) / 2-B is greater than 8mm, the magnetic resistance between the rotors is large, the transmission efficiency is low, and it can lead to loss of synchronization of the driven shaft.

[0166] The structure of a radial magnetic drive counter-rotating motor is as follows: Figure 2 and Figure 3 As shown: The radial magnetic drive counter-rotating motor includes a drive motor 20 and a magnetic gear. The magnetic gear includes a mounting bracket 60, a driving rotor 2, a driven rotor 3, and a magnetic adjusting ring 1. The drive motor 20 is fixed on the mounting bracket 60, and the driving rotor 2 is fixed to the rotating part of the drive motor 20 and rotates with the drive motor 20. A magnetic adjusting ring 1 made of soft magnetic material is provided on one side of the driving rotor 2, and the driven rotor 3 is provided on the other side of the magnetic adjusting ring 1. Both the driving rotor 2 and the driven rotor 3 are radially magnetized.

[0167] The structure of an axial magnetic drive counter-rotating motor is as follows: Figure 6 and Figure 7 As shown, the axial magnetic drive counter-rotating motor includes a drive motor 20 and a magnetic gear. The magnetic gear includes a magnetic adjusting ring 1, a driving rotor 2, a driven rotor 3, and a mounting bracket 60. The drive motor 20 is fixed on the mounting bracket 60, and the driving rotor 2 is fixed to the rotating part of the drive motor 20 and rotates with the drive motor 20. A magnetic adjusting ring 1 made of soft magnetic material is provided on one side of the driving rotor 2, and the driven rotor 3 is provided on the other side of the magnetic adjusting ring 1. Both the driving rotor 2 and the driven rotor 3 are axially magnetized.

[0168] like Figure 4 , Figure 8 and Figure 9 As shown, the effective magnetic conduction area of ​​the adjusting ring 1 should be consistent with the shape of the magnetized area of ​​the magnetic ring. The adjusting ring 1 has evenly distributed adjusting teeth 11, magnetic isolation holes 12 and magnetic isolation grooves 13. The radial magnetic drive adjusting ring 1 has a first reinforcing rib (such as mounting ring 14) and a second reinforcing rib (such as connecting ring 15) on both sides of the axial direction.

[0169] The magnetic isolation groove 13 has a chamfer 132 at one end near the connection of the magnetic isolation teeth. The number of magnetic isolation holes 12 is Q, where Q = (P1 + P2) / 2, and the number of poles of the driving rotor 2 is P1, and the number of poles of the driven rotor 3 is P2.

[0170] If the magnetic ring is radially magnetized (e.g.) Figure 10 and Figure 13The magnetized surface of the magnetic ring should be the radial curved surface of the annular magnetic ring. The effective magnetic conduction area of ​​the adjusting magnetic ring 1 should also be annular. Magnetic isolation holes 12 are uniformly cut on the radial curved surface around the center of the annular ring.

[0171] If the magnetic ring is axially magnetized (e.g.) Figure 11 and Figure 14 (As shown in the rotor), the magnetization surface of the magnetic ring should be the axial plane of the circular magnetic ring. The effective magnetic conduction area of ​​the adjusting magnetic ring 1 should also be planar, with magnetic isolation holes 12 uniformly cut around the center of the ring on the axial plane.

[0172] like Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the counter-rotating motor includes: a drive motor 20, a mounting bracket 60, a driving rotor 2, a driven rotor 3, and a magnetic adjusting ring 1. The driving rotor 2 is fixed to the rotating part of the drive motor 20, and the drive motor 20 drives the driving rotor 2 to rotate. The driving rotor 2 and the driven rotor 3 can be annular (e.g., Figure 10 As shown), it can also be disc-shaped (such as...). Figure 11 As shown), a magnetic adjusting ring 1 made of soft magnetic material is provided on one side of the driving rotor 2, and a driven rotor 3 (as shown) is provided on the other side of the magnetic adjusting ring 1. Figure 13 and Figure 14 (As shown). The adjusting magnetic ring 1 is fixed between the driving rotor 2 and the driven rotor 3. By adjusting the magnetic circuit through the adjusting magnetic ring 1, the driven rotor 3 can be driven to rotate in the opposite direction by magnetic force.

[0173] The magnetic adjustment ring 1 is made of ferrous material with magnetic conductivity and has a certain strength and is not easily deformed. The effective magnetic conduction area of ​​the magnetic adjustment ring 1 should be consistent with the shape of the magnetic ring magnetization area. The magnetic adjustment ring 1 has magnetic adjustment teeth 11, magnetic isolation holes 12 and magnetic isolation grooves 13 evenly distributed on it. The magnetic isolation groove 13 has a chamfer 132 at one end near the connection of the magnetic isolation teeth.

[0174] The number of magnetic isolation holes 12 is Q, where Q = (P1 + P2) / 2, where P1 is the number of poles of the driving rotor 2, P2 is the number of poles of the driven rotor 3, and B is the thickness of the adjusting magnetic ring 1. Where 0.5mm ≤ B ≤ 3mm, when B is less than 0.5mm, the adjusting magnetic ring 1 is too thin, its structural strength is too low, and it is prone to wobbling during operation, easily generating mechanical friction and noise. When B is greater than 3mm, the adjusting magnetic ring 1 suffers greater losses and occupies a larger air gap space between magnetic rings, reducing magnetic transmission efficiency. The magnetic isolation holes 12 can be irregular shapes such as rectangles, circles, ellipses, triangles, and polygons. The purpose of the magnetic isolation holes 12 is to ensure that the effective magnetic conduction area of ​​the adjusting magnetic ring 1 can transmit the magnetic circuit reasonably, reduce magnetic leakage, and improve magnetic transmission efficiency.

[0175] like Figure 4 , Figure 10 and Figure 13As shown, the magnetic ring (i.e., the rotor) is radially magnetized. The magnetized surface of the magnetic ring should be the radial curved surface of the annular magnetic ring. The effective magnetic conduction area of ​​the adjusting magnetic ring 1 should also be annular. Magnetic isolation holes 12 are uniformly cut on the radial curved surface around the center of the annular ring in the circumferential direction.

[0176] like Figure 4 , Figure 10 and Figure 13 As shown, the axial length of the magnetic ring is H, and the axial length of the adjusting magnetic ring 1 is J, where 1 ≤ J / H ≤ 1.5. When J / H is less than 1, the axial length of the adjusting magnetic ring 1 is less than the axial length of the magnetic ring, resulting in more magnetic leakage and reduced magnetic transmission efficiency. When J / H is greater than 1.5, the axial length of the adjusting magnetic ring 1 is too large, resulting in waste of material for the adjusting magnetic ring 1 and occupying axial space, thus increasing the axial volume of the product.

[0177] The outer diameter of the inner magnetic ring is D, and the inner diameter of the adjusting magnetic ring 1 is V. 1mm≤V-D2≤4mm. When V-D2 is less than 1mm, the adjusting magnetic ring 1 is prone to mechanical friction with the driving rotor and / or driven rotor due to installation errors and structural sway. When V-D2 is greater than 4mm, the air gap length between the magnetic ring and the adjusting magnetic ring 1 is too large, the magnetic resistance is too large, and the magnetic transmission efficiency is reduced.

[0178] like Figure 4 , Figure 10 and Figure 13 As shown, the inner diameter of the outer magnetic ring is W, and the outer diameter of the adjusting magnetic ring 1 is X. 1mm≤WX≤4mm. When WX is less than 1mm, the adjusting magnetic ring 1 is prone to mechanical friction with the magnetic ring due to installation errors and structural misalignment. When WX is greater than 4mm, the air gap length between the magnetic ring and the adjusting magnetic ring 1 is too large. Due to the low permeability of air, the magnetic resistance is too large, which reduces the magnetic transmission efficiency.

[0179] like Figure 4 , Figure 10 and Figure 13 As shown, the axial length of the adjusting magnetic ring 1 is J, and the maximum axial length of the magnetic isolation hole 12 is K, where 1mm ≤ JK ≤ 4mm. When JK is greater than 4mm, the axial length of the magnetic isolation hole 12 is too small, failing to isolate the magnetic circuit, and the excessively wide magnetic bridge increases magnetic leakage, reducing magnetic transmission efficiency. When JK is less than 1mm, the width of the connection between the two sides of the magnetic isolation hole 12 is too small, resulting in insufficient strength and easy deformation, causing mechanical friction between the adjusting magnetic ring 1 and the magnetic ring, generating noise.

[0180] like Figure 4 , Figure 10 and Figure 13As shown, the maximum circumferential angle corresponding to the magnetic isolation hole 12 is q, 100° / Q≤q≤260° / Q. When q is less than 100° / Q, the width of the magnetic isolation hole 12 is too small, the magnetic isolation effect is poor, and the effect of the magnetic adjustment ring 1 on the magnetic circuit is not obvious. When q is greater than 260° / Q, the width of the magnetic isolation hole 12 is too large, which makes the width of the magnetic adjustment tooth 11 too small, which easily causes the magnetic adjustment tooth 11 to become magnetically saturated, and reduces the magnetic adjustment effect and magnetic transmission efficiency.

[0181] like Figure 4 , Figure 10 and Figure 13 As shown, the magnetic isolation grooves 13 are distributed on one or both sides of the magnetic adjustment teeth 11 along the axis, and the axial length of the magnetic adjustment teeth 11 is L; where 0.6≤L / J≤0.9. When L / J is less than 0.6, the axial length of the magnetic adjustment teeth 11 is too small, that is, the effective magnetic conduction area is too small, which easily causes magnetic saturation of the magnetic adjustment teeth 11 and increases magnetic leakage, affecting the magnetic field modulation effect; when L / J is greater than 0.9, the axial length of the magnetic adjustment teeth 11 is too large, the width of the magnetic isolation holes 12 and the magnetic isolation bridges on both sides is too small, the magnetic isolation effect is poor, the magnetic leakage increases, and the magnetic transmission efficiency and magnetic field modulation effect are affected.

[0182] like Figure 4 , Figure 10 and Figure 13 As shown, the magnetic isolation groove 13 has chamfers 132 at two corners near the connection of the magnetic isolation teeth. The chamfers 132 serve to strengthen the structural strength. The diameter of the chamfers 132 is v, where 0.3mm ≤ v ≤ 2mm. When v is less than 0.3mm, the area of ​​the chamfers 132 is small and cannot strengthen the magnetic bridge. When v is greater than 2mm, the area of ​​the chamfers 132 is large, resulting in greater magnetic leakage at the magnetic isolation bridge and reducing the magnetic transmission efficiency.

[0183] like Figure 4 , Figure 8 and Figure 9 As shown, on the side where the adjusting magnetic ring 1 connects to the mounting bracket 60, a first reinforcing rib (i.e., mounting ring 14) is provided, perpendicular to the adjusting teeth 11 of the adjusting magnetic ring 1 and parallel to the plane of the mounting bracket 60. The first reinforcing rib serves to strengthen the structural strength of the adjusting magnetic ring 1 and connect the adjusting magnetic ring 1 to the mounting bracket 60. The first reinforcing rib can be a circular ring structure, with an inner diameter of Z and an inner diameter of V for the adjusting magnetic ring 1, where Z = V; an outer diameter of Y and an outer diameter of X for the adjusting magnetic ring 1, where 6mm ≤ YX ≤ 20mm; when YX is less than 6mm, the width of the reinforcing rib is too small, and its effect on strengthening the structural strength is small, failing to provide a stable connection between the adjusting magnetic ring 1 and the mounting bracket 60; when YX is greater than 20mm, it occupies too much radial space, resulting in wasted space; the thickness of the first reinforcing rib is h1, where 0.5mm ≤ h1 ≤ 3mm. When h1 is less than 0.5mm, the structural strength of the reinforcing rib is low, easily causing deformation and sway; when h1 is greater than 3mm, it results in wasted axial space.

[0184] like Figure 4 , Figure 8 and Figure 9 As shown, on the other side of the axial direction of the adjusting magnetic ring 1, a second reinforcing rib (such as connecting ring 15) is provided. The second reinforcing rib serves to strengthen the structural strength. The second reinforcing rib is a circular ring structure with an outer diameter of A and an outer diameter of X for the adjusting magnetic ring 1, where A = X. The inner diameter of the second reinforcing rib is C, and the inner diameter of the adjusting magnetic ring 1 is V. 1mm ≤ VC ≤ 6mm. When VC is less than 1mm, the width of the reinforcing rib is too small and cannot strengthen the structural strength; when VC is greater than 6mm, the width of the reinforcing rib is too large, which can easily increase magnetic leakage and reduce magnetic transmission efficiency.

[0185] like Figure 4 , Figure 10 and Figure 13 As shown, the thickness of the second reinforcing rib is h2, 0.5mm≤h2mm≤3. When h2 is less than 0.5mm, the structural strength of the second reinforcing rib is low, and the magnetic ring 1 is prone to deformation and swaying, causing mechanical friction. When h2 is greater than 3mm, the leakage magnetic field increases, resulting in low magnetic transmission efficiency and wasting axial space.

[0186] like Figure 8 , Figure 9 , Figure 11 and Figure 14 As shown, the magnetic ring is axially magnetized, and the magnetized surface of the magnetic ring should be the axial plane of the circular magnetic ring. The effective magnetic conduction area of ​​the adjusting ring 1 should also be planar. The adjusting teeth 11, the magnetic isolation holes 12, and the magnetic isolation grooves 13 are evenly distributed on the adjusting ring 1, and the magnetic isolation groove 13 has a chamfer 132 at one end near the connection of the magnetic isolation teeth.

[0187] like Figure 8 , Figure 9 , Figure 11 and Figure 14 As shown, the inner diameter of the adjusting magnetic ring 1 is M, and the outer diameter is O. The inner diameter of the magnetic ring is E, and the outer diameter is F. Where 0.6 ≤ M / E ≤ 0.9, when M / E is greater than 0.9, the inner diameter of the adjusting magnetic ring 1 is close to the inner diameter of the magnetic ring, resulting in more magnetic leakage and reducing magnetic transmission efficiency; when M / E is less than 0.6, the inner diameter of the adjusting magnetic ring 1 is too small, resulting in waste of the magnetic conductive material. 1 ≤ O / F ≤ 1.5, when O / F is less than 1, the outer diameter of the adjusting magnetic ring 1 is smaller than the outer diameter of the magnetic ring, resulting in more magnetic leakage and reducing magnetic transmission efficiency; when O / F is greater than 1.5, the outer diameter of the adjusting magnetic ring 1 is too large, resulting in material waste and occupying radial space.

[0188] like Figure 11 and Figure 14As shown, the radial length of the magnetic isolation hole 12 is P, where 1mm≤(OM) / 2-P≤4mm. When (OM) / 2-P is less than 1mm, the width of the magnetic isolation bridge at the connection between the two sides of the magnetic isolation hole 12 is too small and the strength is too small, which can easily cause the structure of the magnetic adjustment ring 1 to deform and the magnetic adjustment ring 1 to generate interference friction noise with the magnetic ring. When (OM) / 2-P is greater than 4mm, the width of the magnetic isolation bridge is too large, which causes more magnetic leakage and reduces the magnetic transmission efficiency.

[0189] like Figure 8 , Figure 9 , Figure 11 and Figure 14 As shown, the maximum circumferential angle corresponding to the magnetic isolation hole 12 is i, 100° / Q≤i≤260° / Q. When i is less than 100° / Q, the width of the magnetic isolation hole 12 is too small, the magnetic isolation effect is poor, and the effect of the magnetic adjustment ring 1 on the magnetic circuit is not obvious. When i is greater than 260° / Q, the width of the magnetic isolation hole 12 is too large, which makes the width of the magnetic adjustment tooth 11 too small, which easily causes the magnetic adjustment tooth 11 to be magnetically saturated, and the magnetic adjustment effect and magnetic transmission efficiency are reduced.

[0190] like Figure 8 , Figure 9 , Figure 11 and Figure 14 As shown, the magnetic isolation grooves 13 are distributed on one or both sides of the magnetic adjustment teeth 11 in the radial direction. The maximum radial length of the magnetic adjustment teeth 11 is S, 0.6≤S / (OM) / 2≤0.9. When S / (OM) / 2 is less than 0.6, the radial length of the magnetic adjustment teeth 11 is too small, which can easily cause magnetic saturation of the magnetic adjustment teeth 11 and affect the magnetic adjustment effect. When S / (OM) / 2 is greater than 0.9, the radial length of the magnetic isolation grooves 13 is too small, the magnetic isolation effect is poor, and magnetic leakage can easily occur, affecting the magnetic transmission efficiency and the magnetic adjustment effect.

[0191] The magnetic shielding groove 13 has chamfers 132 at two corners near the connection of the magnetic shielding teeth. The chamfers 132 serve to strengthen the structural strength. The diameter of the chamfers 132 is w, where 0.3mm ≤ w ≤ 2mm. When w is less than 0.3mm, the area of ​​the chamfers 132 is small and does not effectively reinforce the magnetic bridge; when w is greater than 2mm, the area of ​​the chamfers 132 is large, resulting in greater magnetic leakage at the magnetic bridge and reducing the magnetic transmission efficiency.

[0192] The rotor is a permanent magnet with a certain magnetic properties. The rotor can be a one-piece circular magnetic ring (such as...). Figure 10 As shown), multiple sheet magnets can also be spliced ​​together to form a ring structure, such as... Figure 11 As shown), it can also be a structure in which multiple sheet magnets 4 are inserted into a circular magnetic ring 5 (as shown). Figure 12 (As shown).

[0193] If the magnetic ring is radially magnetized, the magnetized surface should be the radial curved surface of the annular magnetic ring, i.e., the magnetic ring is a cylinder. The height of the cylinder is H, and the outer diameter of the cylinder is D, where 0.5 ≤ D / H ≤ 5. When the volume of the magnetic ring is constant, if D / H is less than 0.5, the magnetic ring is elongated and thin, making it difficult to manufacture, easily broken, and its magnetic properties are reduced due to its small thickness. If D / H is greater than 5, the magnetic ring is sheet-like, and the magnetized surface area is too small, further reducing its magnetic properties.

[0194] If the magnetic rings are radially magnetized, the two magnetic rings should be nested in a nested position, with the inner curved surface of the larger diameter magnetic ring magnetized and the outer curved surface of the smaller diameter magnetic ring magnetized, and the two magnetized curved surfaces facing each other.

[0195] The adjusting magnetic ring 1 is fixed between the large magnetic ring and the small magnetic ring. The inner diameter of the large magnetic ring is D1, and the outer diameter of the small magnetic ring is D2. The thickness of the adjusting magnetic ring 1 is B. Where 0.5mm ≤ B ≤ 3mm, when B is less than 0.5mm, the adjusting magnetic ring 1 is too thin, its strength is too low, and it is prone to wobbling during operation. The adjusting magnetic ring 1 contacts the driving rotor 2 and / or the driven rotor 3, generating mechanical friction and noise. When B is greater than 3mm, the adjusting magnetic ring 1 suffers greater losses and occupies a larger air gap space between the magnetic rings, reducing magnetic transmission efficiency. Where 2mm ≤ (D1-D2) / 2-B ≤ 8mm, when (D1-D2) / 2-B is less than 2mm, the magnetic ring and the adjusting magnetic ring 1 are prone to friction and noise due to assembly errors or wobbling. When (D1-D2) / 2-B is greater than 8mm, the magnetic resistance between the magnetic rings is large, the transmission efficiency is low, and it may even lead to the driven shaft losing synchronization.

[0196] If the magnetic ring is axially magnetized, the magnetized surface of the ring should be the axial plane of the annular magnetic ring, with the axial planes of the two magnetic rings facing each other. The inner diameter of the magnetic ring is E, and the outer diameter is F, with a ratio of 0.4 ≤ E / F ≤ 0.7. When E / F is less than 0.4, the inner hole of the magnetic ring is small, and the radial thickness is large, resulting in a waste of permanent magnet or magnetically conductive material. When E / F is greater than 0.7, the radial thickness of the magnetic ring is thin, the structure is fragile, the processing is difficult, and the magnetic properties of the magnetic ring are low.

[0197] The distance between the adjusting magnetic ring 1 and the driving rotor 2 is G, where 0.5mm≤G≤4mm. When G is less than 0.5mm, the magnetic ring and the adjusting magnetic ring 1 are prone to interference and friction due to installation and processing errors, which can cause noise. When G is greater than 4mm, the magnetic transmission efficiency will be greatly reduced, which will affect the efficiency of the magnetic transmission and may even cause the driven shaft to lose synchronization.

[0198] The distance between the adjusting magnetic ring 1 and the driven rotor 3 is I, 0.5mm≤I≤4mm. When I is less than 0.5mm, the magnetic ring and the adjusting magnetic ring 1 are prone to interference and friction due to installation error and processing error, which will cause noise. When I is greater than 4mm, the magnetic transmission efficiency will be greatly reduced, which will affect the efficiency of the magnetic transmission and even cause the driven shaft to lose synchronization.

[0199] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0200] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0201] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fan, characterized by, include: A drive motor, including a first output shaft; The magnetic gear includes a driving rotor, a driven rotor, and a magnetic adjusting ring. The driving rotor and the driven rotor are located on opposite sides of the magnetic adjusting ring, and the driving rotor is mounted on the first output shaft. The driven rotor can rotate under the action of the driving rotor. The first fan blade is mounted on the first output shaft and can rotate under the action of the first output shaft; The second blade is connected to the driven rotor and can rotate with the driven rotor; The rotation center of the first output shaft and the rotation center of the driven rotor are parallel to each other.

2. The fan of claim 1, wherein, The driven rotor includes: The second output shaft is mounted on the first output shaft and can rotate relative to the first output shaft; the second fan blade is mounted on the second output shaft. When the first output shaft rotates, the second output shaft can rotate in the opposite direction relative to the first output shaft.

3. The fan of claim 2, wherein, Also includes: The drive motor further includes a motor body, at least a portion of the first output shaft is mounted in the motor body, and the first output shaft includes a first output end and a second output end extending from two opposite sides of the motor body. The first fan blade is mounted on the first output end, and the second output shaft and the active rotor are mounted on the second output end.

4. The fan of claim 2, wherein, The drive motor also includes a motor body, at least a portion of the first output shaft is mounted in the motor body, and the first output shaft includes a third output end extending from one side of the motor body; The first fan blade is mounted on the third output terminal, and at least a portion of the second output shaft is mounted on the outside of the third output terminal; At least a portion of the second fan blade is disposed radially outside the first fan blade.

5. The fan of claim 4, wherein, The rotational speed of the second fan blade is less than that of the first fan blade.

6. The fan of claim 2, wherein, Also includes: One or more bearings are mounted on the first output shaft, and the second output shaft is provided with a rotating hole, through which the second output shaft is sleeved onto one or more of the bearings.

7. The fan of claim 2, wherein, The second output shaft includes: A support sleeve is mounted on the first output shaft and is rotatable relative to the first output shaft. The mounting part is connected to the support sleeve. At least a portion of the active rotor and the mounting part are respectively located on opposite sides of the adjusting ring. The driven rotor is mounted on the mounting part at a position corresponding to the active rotor.

8. The fan of claim 1, wherein, Also includes: The drive motor and the adjusting magnetic ring are both mounted on the mounting bracket. The drive motor further includes a motor body, at least a portion of the first output shaft is mounted in the motor body, and at least a portion of the first output shaft extends out from the motor body; The motor body and the magnetic gear are located on the same side of the mounting bracket, or the motor body and the magnetic gear are located on opposite sides of the mounting bracket.

9. The fan of claim 2, wherein, The first output shaft includes: The first shaft segment, the second shaft segment, and the third shaft segment are connected to each other in sequence, and the diameters of the first shaft segment, the second shaft segment, and the third shaft segment increase sequentially. The active rotor is mounted on the second shaft segment, the second output shaft is mounted on the first shaft segment, and the third shaft segment is located within the motor body.

10. The fan according to claim 9, characterized in that, The first output shaft further includes a fourth shaft segment connected to the third shaft segment on the side away from the second shaft segment, and extending from the motor body on the side away from the second shaft segment. The fourth shaft segment is used to mount the first fan blade; and / or The difference between the diameter of the second shaft segment and the diameter of the first shaft segment is greater than or equal to 0.5 mm and less than or equal to 2 mm, and / or the difference between the diameter of the third shaft segment and the diameter of the second shaft segment is greater than or equal to 0.5 mm and less than or equal to 2 mm.

11. The fan of any one of claims 1 to 10, wherein, Also includes: The drive motor is mounted on the center grille. A first mesh cover and a second mesh cover are respectively fixed on both sides of the middle mesh cover along the axial direction of the first output shaft; The first fan blade is installed within the space enclosed by the first mesh cover and the middle mesh cover, and the magnetic gear and the second fan blade are installed within the space enclosed by the second mesh cover and the middle mesh cover.

12. The fan of any one of claims 1 to 10, wherein, The adjusting ring includes: Mounting ring; Multiple magnetic adjustment teeth are spaced apart on the mounting ring along the first circumferential direction, and a magnetic isolation hole is formed between two adjacent magnetic adjustment teeth. The mounting ring is located at one end of the multiple magnetic adjustment teeth along the length direction. A connecting ring is connected to one end of the plurality of magnetic adjustment teeth away from the mounting ring, and the connecting ring and the mounting ring are spaced apart along the length direction; The magnetic adjustment teeth are provided with magnetic isolation grooves at one or both ends along the length direction.

13. The fan according to claim 12, characterized in that, The magnetic adjustment teeth include two ends arranged along the length direction, and the magnetic isolation groove is provided with a chamfer. The chamfer is provided on the side of the magnetic isolation groove near the end. The magnetic isolation groove is provided with the chamfer at one or both ends distributed along the first circumferential direction.

14. The fan of any one of claims 1 to 10, wherein, The driving rotor has P1 poles, and the driven rotor has P2 poles, wherein: both P1 and P2 are even numbers, and P1 is less than P2, and / or 0.3 ≤ P2 / P1 ≤ 3; and / or The rotational speed of the first fan blade is n1, and the rotational speed of the second fan blade is n2, where 0.3 ≤ n2 / n1 ≤ 3.

15. The fan of any one of claims 1 to 10, wherein, Along the length direction of the adjusting teeth, the distance between the adjusting ring and the driving rotor and / or the driven rotor is G, where 0.5mm≤G≤4mm.

16. The fan according to any one of claims 1 to 10, characterized in that, The driving rotor and the driven rotor are respectively located on two radially opposite sides of the adjusting ring, or the driving rotor and the driven rotor are respectively located on two axially opposite sides of the adjusting ring; and / or The first and second fan blades are axial flow fan blades.

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