Transmission mechanism, counter-rotating control method, fan head structure and fan assembly

Abstract

The embodiment of the invention provides a transmission mechanism, a counter-rotating control method, a fan head structure and a fan assembly.The transmission mechanism comprises a driving rotor, at least one first magnet is arranged on the driving rotor, and the driving rotor is used for being connected with a driving working part; the driven rotor is provided with at least one second magnet, and the driven rotor is used for being connected with the driven working part; the modulation ring is arranged between the driving rotor and the driven rotor, and the modulation ring comprises magnetic conductive parts which are arranged at intervals in the circumferential direction; wherein the axis of the driving rotor, the axis of the modulation ring and the axis of the driven rotor are collinear, and the modulation ring is used for driving the driven rotor to rotate under the condition that the driving rotor rotates. According to the technical scheme, under the action of the modulation ring, counter rotation of the driven rotor can be achieved under the condition that the driving rotor rotates.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a transmission mechanism, a counter-rotation control method, a fan head structure and a fan assembly. Background Art

[0002] At present, most household fans use one or more fan blades driven by a motor to achieve air supply. When multiple fan blades are used, the multiple fan blades are designed to be nested inside and outside. Multiple fan blades are directly driven by a motor to rotate in the same direction, resulting in poor air dispersion effect. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, an embodiment of a first aspect of the present invention provides a transmission mechanism.

[0005] An embodiment of the second aspect of the present invention provides a counter-rotation control method.

[0006] An embodiment of the third aspect of the present invention provides a fan head structure.

[0007] An embodiment of a fourth aspect of the present invention provides a fan assembly.

[0008] To achieve the above-mentioned objectives, an embodiment of a first aspect of the present invention provides a transmission mechanism, comprising: a driving rotor, on which at least one first magnet is provided, and the driving rotor is used to connect to an active working part; a driven rotor, on which at least one second magnet is provided, and the driven rotor is used to connect to a driven working part; a modulation ring, disposed between the driving rotor and the driven rotor, the modulation ring comprising magnetic conductive portions spaced apart along the circumferential direction; wherein the axis of the driving rotor, the axis of the modulation ring, and the axis of the driven rotor are collinear, and the modulation ring is used to drive the driven rotor to rotate when the driving rotor rotates.

[0009] The transmission mechanism proposed in the present invention includes a driving rotor, a driven rotor, and a modulation ring. The driving rotor and the driven rotor are respectively used to connect the active working part and the driven working part, so that when the driving rotor rotates, the active working part is driven to rotate synchronously. Similarly, when the driven rotor rotates, the driven working part is driven to rotate synchronously. The driving rotor and the driven rotor are each provided with one or more magnetic single structures, namely, a first magnet located on the driving rotor and a second magnet located on the driven rotor. The number of the first magnet and the second magnet can be one or more, and their shapes can be flexibly adjusted according to specific design requirements.

[0010] It should be emphasized that the present application sets a modulation ring between the active rotor and the driven rotor, and the three are coaxially arranged. The modulation ring is used to rotate when the active rotor rotates. Since there is a magnetic conductive part on the modulation ring that can conduct magnetism, when the N pole of the first magnet on the active rotor emits magnetic lines of force, according to the principle of minimum magnetic resistance, it will pass through the magnetic conductive part on the modulation ring and attract the S pole of the second magnet on the driven rotor to move toward the magnetic conductive part, thereby achieving counter-rotation, that is, under the action of the modulation ring, the counter-rotation of the driven rotor is realized when the active rotor rotates.

[0011] When both the active working part and the driven working part are fan blades, the fan blades located on the inner side can disperse the wind, making the wind outlet area larger and the wind feeling softer. Of course, the active working part and the driven working part can also be blades to achieve better chopping effect.

[0012] It can be understood that the rotors in the transmission mechanism of the present application, that is, the active rotor and the driven rotor can be directly connected to the load, thereby eliminating the drive shaft of the traditional motor, forming a coreless motor, and changing the setting method of the motor and the load, so that the motor does not need to be set axially with the load, thereby reducing the size of the motor in the axial direction, effectively reducing the space occupied, and facilitating a lightweight and miniaturized design.

[0013] The rotor structure as a whole may be in the shape of a circular ring, a square ring, an elliptical ring or other closed rings.

[0014] In the above technical solution, there is a first air gap between the active rotor and the modulation ring, and there is a second air gap between the driven rotor and the modulation ring.

[0015] In this technical solution, by setting intervals between the modulation ring and the active rotor and the driven rotor, direct contact between the active rotor and the modulation ring can be avoided. When the three are coaxial, when the active rotor rotates, the magnetic lines of force emitted by the N pole of the first magnet can pass through the magnetic conductive part on the modulation ring, attracting the S pole of the second magnet on the driven rotor to move toward the magnetic conductive part. The entire movement process is relatively smooth, and no additional friction is generated, thereby ensuring rotation efficiency.

[0016] The position of the first air gap is determined by the relative positions of the active rotor and the modulation ring. For example, if the active rotor and the modulation ring are radially nested, the first air gap is the radial clearance between them. Similarly, the position of the second air gap is determined by the relative positions of the driven rotor and the modulation ring.

[0017] By arranging the two rotors and the modulation ring at intervals, under the action of the first air gap and the second air gap, the interference of the magnetic field can be reduced and the efficiency of the motor can be improved.

[0018] In the above technical solution, one of the driving rotor and the driven rotor is arranged on the radial inner side of the modulation ring, and the other is arranged on the radial outer side of the modulation ring.

[0019] In this technical solution, the active rotor and the driven rotor are respectively located on the radial inner and outer sides of the modulation ring, that is, the modulation ring is located in the middle position between the two in the radial direction, wherein the active rotor can be set on the inner side of the modulation ring and the driven rotor is set on the outer side of the modulation ring, or the active rotor can be set on the outer side of the modulation ring and the driven rotor is set on the inner side of the modulation ring. However, no matter which arrangement is adopted, the relative position relationship between the active rotor and the driven rotor in this solution is fixed, specifically a radial nested arrangement. This solution utilizes the inner and outer nested structure of the rotor to ensure the air outlet area and wind feeling without increasing the axial length. Specifically, the one located on the outer side of the active rotor and the driven rotor is an outer rotor, which is mainly used to provide air volume when rotating, and the one located on the inner side of the active rotor and the driven rotor is an inner rotor, which drives the corresponding fan blades to rotate when rotating. In addition to the normal air outlet, it also has a certain wind dispersion effect, thereby increasing the air outlet area and improving the softness of the air outlet. For the inner rotor and the outer rotor, there is no mechanical gear for transmission between the two, so there will be no mechanical friction and collision, which can effectively reduce the noise generated by the transmission. In addition, the load fan blades driven by the inner rotor and the load fan blades driven by the outer rotor will form a counter-rotating relationship. The fan blades corresponding to the inner rotor can disperse the wind, making the air outlet area larger and the wind feeling softer.

[0020] In the above technical solution, the modulation ring specifically includes: a support plate, which is provided with a plurality of openings; a plurality of magnetic conductive parts are arranged at intervals along the circumference of the support plate, and the magnetic conductive parts extend along the axial direction of the active rotor; wherein a non-magnetic conductive part is formed between two adjacent magnetic conductive parts.

[0021] In this technical solution, the modulation ring consists of two parts: a support plate and a magnetic conductive portion. The support plate primarily supports and ensures air flow. Specifically, multiple openings are provided on the support plate to allow air to pass through the structure, thereby satisfying air flow. Furthermore, the magnetic conductive portions are evenly distributed around the support plate. Under the action of these conductive portions, when the driving rotor rotates, the driven rotor also rotates as the harmonic magnetic gear moves away, achieving counter-rotation and speed regulation.

[0022] In this solution, the magnetic conductive portion extends axially, and one end is connected to the edge of the support plate. Such a connection can help fix the magnetic conductive portion on the support plate.

[0023] It should be added that there are many ways to install the magnetic conductive part, such as setting a non-magnetic conductive body between the main body and the magnetic conductive body, or setting a magnetic conductive body between the non-magnetic conductive body and the main body. The non-magnetic conductive part can be air or plastic or other materials that do not have magnetic conductivity.

[0024] It can be understood that in this solution, there is a certain angle between the magnetic conductive portion and the support plate, the support plate extends in the radial direction, and the magnetic conductive portion extends in the axial direction.

[0025] In summary, the description of this modulation ring includes two parts: a support plate and a magnetic conductive portion. It aims to influence the airflow and / or magnetic field distribution within the motor through the arrangement of the openings and the magnetic conductive portion, thereby achieving more effective rotor motion control or improving motor performance.

[0026] In the above technical solution, the driving rotor and the driven rotor are respectively arranged on both axial sides of the modulation ring.

[0027] The driving rotor and the driven rotor are respectively located on both axial sides of the modulation ring, that is, the modulation ring is located in the middle position between the two in the axial direction, wherein the driving rotor can be arranged on the axial front side of the modulation ring, and the driven rotor is arranged on the axial rear side of the modulation ring, or the driving rotor can be arranged on the axial rear side of the modulation ring, and the driven rotor is arranged on the axial front side of the modulation ring. However, no matter which arrangement is adopted, the relative position relationship between the driving rotor and the driven rotor in this scheme is fixed, and it is an axial stacked arrangement. The axial arrangement can reduce the radial size of the entire device.

[0028] In the above technical solution, the modulation ring includes: a support plate; a plurality of magnetic conductive portions arranged at intervals along the circumference of the support plate, and each magnetic conductive portion extends radially outward along the active rotor on the support plate; wherein a non-magnetic conductive portion is formed between two adjacent magnetic conductive portions.

[0029] The modulation ring consists of two parts: a support plate and a magnetic conductive part. The support plate mainly plays the role of supporting and ensuring air flow. Specifically, the magnetic conductive part is evenly distributed around the support plate. Under the action of the magnetic conductive part, when the active rotor rotates, the driven rotor will also rotate according to the distance between the harmonic magnetic gears, and the effect of counter-rotation and speed regulation will be achieved during rotation.

[0030] In this solution, the magnetic conductive portion extends radially, that is, the magnetic conductive portion and the support plate are stacked or overlapped.

[0031] It should be added that there are many ways to install the magnetic conductive part, such as setting a non-magnetic conductive body between the main body and the magnetic conductive body, or setting a magnetic conductive body between the non-magnetic conductive body and the main body. The non-magnetic conductive part can be air or plastic or other materials that do not have magnetic conductivity.

[0032] The above technical solution includes: a stator structure, which is coaxially arranged with the active rotor, and the stator structure includes a stator core for driving the active rotor to rotate.

[0033] By providing a stator structure coaxially disposed with the active rotor, a magnetic field can be generated that envelops the active rotor. The stator structure is disposed on the outer periphery of the rotor structure and is typically surrounded by a set of windings. The stator structure is used to generate a magnetic field that interacts with the magnetic field of the active rotor to generate a rotational force. The stator structure includes at least one stator core disposed circumferentially of the active rotor, which changes the structure of the stator in conventional motors. This means that there is no need to form a closed annular structure or a symmetrical structure circumferentially within or outside the active rotor. Instead, at least one stator core only needs to be disposed correspondingly to the rotor structure. This means that the stator structure is disposed circumferentially of the rotor structure to drive the rotor structure to rotate, thereby driving the movement of a load directly connected to the rotor structure. Furthermore, the location of the stator structure can further reduce the overall size and weight of the motor, particularly reducing the space occupied by the motor in the axial direction. For example, when the motor of the present invention is used in a fan, the motor mounting position behind the blades can be eliminated, which facilitates flattening the fan, reduces the weight of the fan head and the effect of eccentricity, reduces unnecessary counterweights, and improves overall stability.

[0034] It can be understood that the stator structure is a key part of the motor that generates a magnetic field. When current is passed through, the windings in the stator core generate a magnetic field, which interacts with the magnetic field of the active rotor, thereby generating a rotational force to drive the rotation of the motor. It should also be emphasized that the stator structure is arranged on one side of the rotor structure according to the setting position of the rotor, so that the motor as a whole forms an eccentric structure. The setting position of the stator structure is more flexible, making the motor suitable for loads of various structures. Optionally, the stator structure can be arranged on the outside or inside of the rotor in the circumferential direction, or on one side of the rotor in the axial direction, or at other positions according to the specific structure of the load.

[0035] The above technical solution further includes: a driving area, which includes at least one stator core and a portion of the first magnet in the active rotor that is opposite to the stator structure.

[0036] In this solution, part of the stator structure will generate a magnetic field that drives the rotation of part of the active rotor. Specifically, after power is applied to at least one stator core, a part of the active rotor will be covered, including one or more first magnets. Under the action of the magnetic field, part of the first magnets will drive the entire active rotor to rotate. Then, under the action of the modulation ring, the second magnets will also be driven to rotate in the opposite direction, so that the driven rotor and the active rotor rotate in opposite directions.

[0037] It can be understood that the position of the stator structure remains unchanged. When the active rotor rotates, the first magnet in the active rotor facing the stator structure changes, but the area facing the stator structure remains unchanged.

[0038] In the above technical solution, the stator structure has a first curved surface, which faces the active rotor. The first curved surface is arc-shaped, the active rotor is annular, and the curvature of at least part of the first curved surface is the same as that of the active rotor.

[0039] In this solution, the stator structure is not a complete closed figure, but rather an arc shape. When the active rotor is in the shape of a circular ring, the curvatures of the two are limited, that is, the surface of the stator structure facing the active rotor is a first curved surface, and the curvature of this curved surface is the same as the curvature of the active rotor. This ensures that the distance between the stator core and any first magnet remains constant, so that the driving force generated by the magnetic field on the first magnet is the same, thereby ensuring balance during rotation.

[0040] Furthermore, by limiting the active rotor to be annular, the stator structure has a first curved surface that is arc-shaped and faces the active rotor, and the curvature of at least a portion of the first curved surface is the same as that of the active rotor, so that at least a portion of the first curved surface is equidistant from the active rotor, thereby maintaining a balanced driving force generated by at least a portion of the stator structure on the active rotor, which is beneficial to improving the stability of the active rotor during rotation.

[0041] It can be understood that at least a portion of the arc surface of the first curved surface is parallel to the arc surface of the active rotor.

[0042] Optionally, the first curved surface is in an arc shape, the active rotor is in a circular ring shape, and the curvature of the first curved surface is the same as the curvature of the active rotor.

[0043] In this technical solution, by defining the active rotor as an annular ring, the first curved surface as an arc, and the curvature of the first curved surface being the same as that of the active rotor, the stator structure is arranged equidistantly from the active rotor. This ensures that the driving force exerted by the stator structure on the active rotor remains constant during the active rotor's rotation, further improving the stability of the active rotor's rotation. It is understood that changes in the magnitude of the driving force exerted by the stator structure on the active rotor can easily cause changes in the active rotor's rotational speed, affecting the active rotor's rotational stability.

[0044] The arc surface of the first curved surface is always parallel to the arc surface of the active rotor.

[0045] In the above technical solution, the first curved surface is in an arc shape, the active rotor is in a circular ring shape, and the curvature of the first curved surface is the same as that of the active rotor.

[0046] By limiting the active rotor to be annular, the stator structure has an arc-shaped first curved surface facing the active rotor, and the curvature of at least a portion of the first curved surface is the same as the curvature of the active rotor, so that at least a portion of the first curved surface and the active rotor are equidistant, thereby maintaining a balanced driving force generated by at least a portion of the stator structure on the active rotor, which is beneficial to improving the stability of the active rotor during rotation.

[0047] It can be understood that at least a portion of the arc surface of the first curved surface is parallel to the arc surface of the active rotor.

[0048] In the above technical solution, there are multiple stator cores, each of which is provided with at least one stator tooth, and the multiple stator cores are arranged along the circumference of the active rotor.

[0049] In this solution, one or more stator teeth are provided on the stator core. By limiting the setting of multiple stator cores, a magnetic field force on the active rotor can be formed through two stator teeth, driving the active rotor to rotate, and then driving the load to operate.

[0050] The stator structure includes at least two stator teeth, and the at least two stator teeth can be arranged on one stator core, or on multiple stator cores, that is, the number of stator cores is one or more, and the total number of stator teeth on all stator cores is at least two.

[0051] Furthermore, the number of stator teeth is at least two, and the stator windings on any two stator teeth are energized sequentially with the same polarity; or the number of stator teeth is at least two, and the stator windings on any two stator teeth are energized simultaneously with different polarities, and the magnetic poles of the stator windings on any two stator teeth alternate.

[0052] The stator core is provided with stator teeth. By limiting the number of stator teeth on the stator core to at least two, and by sequentially energizing the stator windings on any two stator teeth with the same polarity, the rotor structure can be sequentially acted upon by the stator windings on the two stator teeth, generating forces in the same direction, causing the rotor structure to continuously rotate in the same direction. Furthermore, the stator windings on any two stator teeth can be energized simultaneously with different polarities, and by alternating the magnetic poles of the stator windings on any two stator teeth, a continuous force in the same direction is generated on the rotor structure, driving the rotor structure to continuously rotate in the same direction. It should be noted that the stator teeth are positioned toward the rotor structure so that the magnetic field generated by the stator windings after energization can drive the rotor, thereby driving the rotor structure to rotate the load.

[0053] It can be understood that the at least two stator teeth can be provided on the same stator core or on different stator cores.

[0054] In the above technical solution, the active rotor has a first number of pole pairs, the driven rotor has a second number of pole pairs, and the number of magnetic conductive parts is a third number; wherein the first number of pole pairs is different from the second number of pole pairs, and the third number is the sum of the first number of pole pairs and the second number of pole pairs.

[0055] In this technical solution, the number of pole pairs corresponding to the active rotor is the first pole pair number, and the number of pole pairs corresponding to the driven rotor is the second pole pair number. The number of magnetic conductive parts is determined based on the first and second pole pair numbers. That is, the active rotor and the driven rotor each have different pole pair numbers, and the number of magnetic conductive parts is the sum of these two pole pair numbers. This design creates a specific magnetic field structure. With the modulation ring stationary, the external motor drives the active rotor or the driven rotor to rotate synchronously. Under the action of the magnetic conductive parts, the active rotor and the driven rotor will produce counter-rotation and speed regulation.

[0056] It can be understood that the number of pole pairs is inversely proportional to the rotational speed. For example, if the first number of pole pairs is greater than the second number of pole pairs, the rotational speed of the driving rotor is less than the rotational speed of the driven rotor.

[0057] In the above technical solution, the number of the first pole pairs ranges from 2 to 16, and the number of the second pole pairs ranges from 2 to 16.

[0058] In this technical solution, the stability of the counter-rotation is improved by limiting the specific number of the first pole pairs and the second pole pairs to 2 to 16. It can be understood that if the number of pole pairs is less than 2, the corresponding rotor will have too few steps during rotation, which will cause jitter. If the number is greater than 16, the number of permanent magnets used is too large, the cost is higher, and the assembly is more complicated, which reduces the assembly efficiency.

[0059] In the above technical solution, the driving rotor has a first angular velocity, the driven rotor has a second angular velocity, and the sum of the ratio of the first pole pair number to the second pole pair number and the ratio of the second angular velocity to the first angular velocity is 0.

[0060] When the active rotor rotates, the driven rotor will rotate in the opposite direction under the action of the modulation ring. The angular velocities of the active rotor and the driven rotor are the first angular velocity and the second angular velocity, respectively. By limiting the ratio of the first pole pair number to the second pole pair number to the negative reciprocal of the first angular velocity and the second angular velocity, that is, the sum of the ratio of the first pole pair number to the second pole pair number and the ratio of the second angular velocity to the first angular velocity is 0, the principle of harmonic magnetic gears is satisfied, thereby achieving the effects of counter-rotation and speed regulation.

[0061] The above technical solution further includes: a rotor shaft, a driving rotor and a driven rotor connected to the rotor shaft through bearings; wherein the rotational speed of the driving rotor is different from the rotational speed of the driven rotor to achieve a counter-rotating differential.

[0062] By providing a rotor shaft that carries the active rotor and the driven rotor, and connecting the two rotors to the rotor shaft, the resistance during rotation can be reduced. It should be noted that the active rotor and the driven rotor can be arranged at intervals in the axial direction of the rotor shaft, and the active rotor and the driven rotor are respectively arranged on the rotor shaft through the bearings of the rotor shaft. Alternatively, the active rotor and the driven rotor can be arranged at intervals in the radial direction of the rotor shaft, that is, the two are nested inside and outside. In this case, the inner rotor located on the inner side is arranged on the rotor shaft through bearings, and the outer rotor can be indirectly connected to the rotor shaft through bearings located outside the inner rotor.

[0063] In the above technical solution, the driving rotor and / or the driven rotor are magnetic rings; and / or the driving rotor and / or the driven rotor are split independent structures.

[0064] At least one of the active rotor and the driven rotor can be in the shape of a magnetic ring, or a split independent structure. When the split independent structure is adopted, the number of the first magnet and the second magnet is one or more. Depending on the length of the magnet along the circumferential direction, the time it is affected by the magnetic force will also change. Specifically, the longer the length of the magnet, the longer the time it is affected by the magnetic force of the stator structure. Even if the rotor only includes one magnet, as long as the length of the magnet along the circumferential direction is long enough, it can still achieve continuous rotation under the action of the stator structure.

[0065] Furthermore, the rotor is a magnetic ring, which reduces the weight of individual magnets and contributes to the lightweighting of the motor. Furthermore, the magnetic sheets facilitate installation on the load. The ring structure formed by the magnetic sheets maintains balanced force during rotor rotation without excessively increasing the radial or axial thickness of the load, nor affecting its overall shape or structure.

[0066] In the above technical solution, the first magnet and / or the second magnet are arranged continuously along the circumferential direction; or the first magnet and / or the second magnet are arranged evenly along the circumferential direction, and there is a circumferential gap between any two adjacent first magnets and / or between any two adjacent second magnets; or the active rotor and / or the driven rotor are an integrated structure.

[0067] By continuously arranging the first magnet and / or the second magnet along the circumferential direction, the rotor structure forms an annular belt structure, so that the rotor is subjected to a balanced magnetic force during rotation, which is conducive to maintaining the stability of the rotor during rotation.

[0068] By evenly arranging the first magnet and / or the second magnet along the circumferential direction, and with a circumferential gap between any two adjacent magnets, the rotor forms a discontinuous structure, and multiple magnets are arranged at intervals along the circumferential direction, so that the magnitude and direction of the magnetic force acting on each magnet are the same, thereby maintaining the stability of the rotor during rotation.

[0069] By arranging the driving rotor and / or the driven rotor as an integrated structure, the installation and positioning of the rotors are facilitated, the gaps between the multiple magnets and the resulting shaking are reduced, and the possibility of the magnets moving is reduced.

[0070] An embodiment of the second aspect of the present invention provides a counter-rotation control method for any of the above-mentioned transmission mechanisms, the counter-rotation control method comprising: controlling the rotation of the active rotor; and under the action of the magnetic conductive parts arranged at intervals on the modulation ring, the driven rotor rotates together with the active rotor.

[0071] This solution provides a method for controlling a transmission mechanism, namely a counter-rotation control method. While the modulation ring is controlled to be stationary, the active rotor can be driven to rotate using an external motor or manually. Since the modulation ring has a magnetic conductive portion that can conduct magnetism, the N pole of the first magnet of the active rotor will emit magnetic lines of force. According to the principle of minimum magnetic resistance, these lines of force will pass through the magnetic conductive portion of the modulation ring and attract the S pole magnetic conductive portion of the second magnet on the driven rotor to move, thereby achieving counter-rotation.

[0072] Furthermore, the rotational speed of the active rotor is different from that of the driven rotor to achieve counter-rotational differential speed, thereby spreading the air outlet range when the air volume is large.

[0073] It can be understood that according to the principle of harmonic magnetic gears, the rotational speeds of the driving rotor and the driven rotor are different in order to achieve a counter-rotating effect.

[0074] An embodiment of the third aspect of the present invention provides a fan head structure, comprising: the transmission mechanism of the first aspect mentioned above; a first fan blade, connected to the active rotor of the transmission mechanism through an active connection part; and a second fan blade, connected to the driven rotor of the transmission mechanism through a driven connection part.

[0075] The fan head structure proposed in the present invention includes a transmission mechanism and fan blades. The fan blades are divided into first fan blades and second fan blades. The first fan blades are connected to the active rotor through an active connection part, and the second fan blades are connected to the driven rotor through a driven connection part. The active rotor will drive the first fan blade to rotate under the action of the stator structure, and then drive the second fan blade to rotate under the action of the modulation ring, thereby finally realizing the operation of the fan head structure.

[0076] Since the fan head structure includes a transmission mechanism, it has the beneficial effects of any transmission mechanism in the above-mentioned first embodiment, which will not be repeated here.

[0077] In the above technical solution, the first fan blade is located radially outside the second fan blade; and / or the diameter of the first fan blade is a first size, the diameter of the second fan blade is a second size, and the ratio of the first size to the second size is 0.3 to 0.8.

[0078] In this solution, the first blade can be located on the outside and the second blade on the inside. Of course, the sizes of the two blades can also be restricted, that is, the diameter of the second blade is the second size ΦD, and the diameter of the first blade is the first size Φd. The main function of the second blade is to provide air volume, while the first blade, in addition to providing air volume, also has a wind dispersion effect. After fluid simulation analysis and experimental testing, the best air output effect is achieved when 0.3≤d / D≤0.8. When d / D<0.3, the air output of the first blade is small and the wind dispersion effect is poor; and when d / D>0.8, the effective working area of ​​the second blade is reduced, and the air volume is insufficient. Because the two blades are nested inside and outside, the axial length is not increased, so the head is thinner and easier to store.

[0079] Furthermore, the rotational speeds of the first fan blade and the second fan blade are different to achieve counter-rotational differential speed, thereby spreading the air outlet range when a large air volume is output.

[0080] An embodiment of the fourth aspect of the present invention provides a fan assembly, comprising any one of the above-mentioned fan head structures; and a fan cover assembly for accommodating the fan head structure.

[0081] The fan assembly proposed in this solution includes a fan head structure and a wind cover assembly. The wind cover assembly can protect the fan head structure and also improve the safety of the equipment.

[0082] In the above technical solution, the wind cover assembly includes: a first wind cover and a second wind cover that are detachably connected. After the second wind cover is connected to the first wind cover, a accommodating cavity is formed inside that can accommodate at least the first fan blade, the second fan blade and part of the transmission mechanism, wherein the stator structure of the transmission mechanism is arranged outside the accommodating cavity.

[0083] The fan cover assembly includes a first fan cover and a second fan cover. The first fan cover and the second fan cover are detachably connected to form a receiving cavity inside. The rotor and the fan blades are received in the receiving cavity. The stator structure can be correspondingly arranged in multiple positions. When the stator structure is arranged in the receiving cavity, the motor as a whole can be placed in the receiving cavity. The first fan cover and the second fan cover protect the motor and the fan blades to prevent interference with external objects during the process of the motor driving the fan blades to rotate. When the stator structure is arranged outside the receiving cavity, it is beneficial to reduce space occupation and facilitate the disassembly and assembly of the stator structure. When the stator structure includes multiple stator cores, the stator cores can also be arranged inside and outside the receiving cavity at the same time. In addition, the first fan cover and the second fan cover are detachable to facilitate maintenance or cleaning of the motor and the fan blades.

[0084] The above technical solution also includes: a base, the stator structure is arranged on the base, and the base is detachably connected to the wind cover assembly.

[0085] The base, which is detachably connected to the fan blades, facilitates the use of the fan head structure and facilitates cleaning and maintenance of the fan blades. The stator structure is mounted on the base, meaning it can be removed independently of the rotor structure, making it easier to clean and maintain the stator and rotor structures separately. It is understandable that the stator and rotor of conventional motors are usually installed as one piece, making it difficult to clean the interior of the motor. Dust and other impurities adhering to the interior can easily affect the normal operation of the motor.

[0086] In the above technical solution, the base includes: a seat rod, one end of which is provided with a placement surface; a support frame connected to the end of the seat rod away from the placement surface, the shape of the support frame is adapted to the shape of the stator structure, and the wind cover assembly is detachably connected to the support frame.

[0087] In this solution, the base includes a seat post and a support frame. The seat post, serving as the base of the entire base, directly contacts a supporting surface such as a table or the ground via a placement surface at one end, typically the ground surface of the base. The support frame is located at the other end. The hood assembly is assembled with the support frame to secure its position relative to the ground, thereby achieving airflow in a specific direction. The support frame can be U-shaped, with the stator structure adapted to the shape of the support frame. At least a portion of the hood assembly is located within the support frame, allowing assembly to be accomplished using the support frame.

[0088] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figure 1 A schematic structural diagram of a transmission mechanism according to an embodiment of the present invention is shown;

[0090] Figure 2 A schematic structural diagram of a transmission mechanism according to an embodiment of the present invention is shown;

[0091] Figure 3 A schematic structural diagram of a fan head structure according to an embodiment of the present invention is shown;

[0092] Figure 4 A schematic structural diagram of a fan head structure according to an embodiment of the present invention is shown;

[0093] Figure 5 A schematic structural diagram of a transmission mechanism according to an embodiment of the present invention is shown;

[0094] Figure 6 A schematic structural diagram of a transmission mechanism according to an embodiment of the present invention is shown;

[0095] Figure 7 A schematic structural diagram of a fan assembly according to an embodiment of the present invention is shown;

[0096] Figure 8 A schematic structural diagram of a fan assembly according to an embodiment of the present invention is shown;

[0097] Figure 9 A schematic structural diagram of a fan assembly according to an embodiment of the present invention is shown;

[0098] Figure 10 A schematic structural diagram of a fan assembly according to an embodiment of the present invention is shown;

[0099] Figure 11 A schematic structural diagram of a first magnet according to an embodiment of the present invention is shown.

[0100] in, Figures 1 to 11 The corresponding relationship between the reference numerals and component names is as follows:

[0101] 100: Transmission mechanism; 102: Rotor structure; 1022: Rotor shaft; 1024: Driving rotor; 1026: Driven rotor; 104: Stator structure; 1042: Stator core; 106: Modulation ring; 1062: Support plate; 1063: Opening; 1064: Magnetic conductive portion; 108: Driving motor; 1102: First motor; 1104: Second motor; 112: Bearing; 1142: First magnet; 1144: Second magnet; L1: First air gap; L2: Second air gap;

[0102] 200: Fan assembly; 201: Fan head structure; 2022: First fan blade; 2024: Second fan blade; 2042: First wind shield; 2044: Second wind shield; 206: Base; 2062: Seat post; 2064: Support frame. DETAILED DESCRIPTION

[0103] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0104] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0105] Refer to the following Figures 1 to 11 Some embodiments according to the present invention are described.

[0106] like Figure 1 、 Figure 2As shown, a transmission mechanism 100 proposed in this embodiment includes a driving rotor 1024, a driven rotor 1026, and a modulation ring 106. The driving rotor 1024 and the driven rotor 1026 are respectively used to connect the active working part and the driven working part, so that when the driving rotor 1024 rotates, the active working part is driven to rotate synchronously. Similarly, when the driven rotor 1026 rotates, the driven working part is driven to rotate synchronously. Specifically, the driving rotor 1024 and the driven rotor 1026 are each provided with one or more magnetic single structures, namely, a first magnet 1142 located on the driving rotor 1024 and a second magnet 1144 located on the driven rotor 1026. The number of the first magnet 1142 and the second magnet 1144 can be one or more, and their shapes can be flexibly adjusted according to specific design requirements.

[0107] It needs to be emphasized that Figure 6 As shown, the present application provides a modulation ring 106 between the active rotor 1024 and the driven rotor 1026, and the three are coaxially arranged. The modulation ring 106 is used for when the active rotor 1024 rotates. Since there is a magnetic conductive portion 1064 on the modulation ring 106 that can conduct magnetism, when the N pole of the first magnet 1142 on the active rotor 1024 emits magnetic lines of force, according to the principle of minimum magnetic resistance, the magnetic conductive portion 1064 on the modulation ring 106 will be attracted to move the S pole of the second magnet 1144 on the driven rotor 1026, thereby achieving counter-rotation. That is, under the action of the modulation ring 106, the counter-rotation of the driven rotor 1026 is achieved when the active rotor 1024 rotates.

[0108] When both the active working part and the driven working part are fan blades, the fan blades located on the inner side can disperse the wind, making the wind outlet area larger and the wind feeling softer. Of course, the active working part and the driven working part can also be blades to achieve better chopping effect.

[0109] It can be understood that the rotors in the transmission mechanism 100 of the present application, namely the active rotor 1024 and the driven rotor 1026, can be directly connected to the load, thereby eliminating the drive shaft of the traditional motor, forming a coreless motor, and changing the setting method of the motor and the load, so that the motor does not need to be set axially with the load, thereby reducing the size of the motor in the axial direction, effectively reducing the space occupied, and facilitating a lightweight and miniaturized design.

[0110] The rotor structure 102 as a whole may be in the shape of a circular ring, a square ring, an elliptical ring or other closed rings.

[0111] The modulation ring 106 and the active rotor 1024 and the driven rotor 1026 are spaced apart to prevent direct contact between the active rotor 1024 and the modulation ring 106. When the three are coaxial, when the active rotor 1024 rotates, the magnetic lines of force emitted by the N pole of the first magnet 1142 can pass through the magnetic conductive portion 1064 on the modulation ring 106, attracting the S pole of the second magnet 1144 on the driven rotor 1026 to move. The entire movement process is relatively smooth without generating additional friction, thereby ensuring rotation efficiency.

[0112] Among them, Figure 1 As shown, the position of the first air gap L1 is determined by the relative positions of the driving rotor 1024 and the modulation ring 106. For example, if the driving rotor 1024 and the modulation ring 106 are radially nested, the first air gap is the radial clearance between them. Similarly, the position of the second air gap L2 is determined by the relative positions of the driven rotor 1026 and the modulation ring 106.

[0113] By arranging the two rotors and the modulation ring 106 at intervals, under the action of the first air gap and the second air gap, the interference of the magnetic field can be reduced and the efficiency of the motor can be improved.

[0114] Regarding the relative positions of the active rotor 1024, the driven rotor 1026, and the modulation ring 106, in one embodiment, as shown in FIG. Figure 6As shown, the active rotor 1024 and the driven rotor 1026 are respectively located on the radial inner and outer sides of the modulation ring 106, that is, the modulation ring 106 is located in the middle position between the two in the radial direction, wherein the active rotor 1024 can be arranged on the inner side of the modulation ring 106, and the driven rotor 1026 is arranged on the outer side of the modulation ring 106, or the active rotor 1024 can be arranged on the outer side of the modulation ring 106, and the driven rotor 1026 is arranged on the inner side of the modulation ring 106. However, no matter which arrangement is adopted, the relative position relationship between the active rotor 1024 and the driven rotor 1026 in this solution is determined, specifically a radial nested arrangement. This solution utilizes the inner and outer nested structure of the rotor to ensure the wind outlet area and wind feeling without increasing the axial length. Specifically, the outermost of the active rotor 1024 and the driven rotor 1026 is the outer rotor, which is primarily used to provide air volume when rotating. The innermost of the active rotor 1024 and the driven rotor 1026 is the inner rotor, which drives the corresponding fan blades to rotate when rotating. In addition to normal air discharge, it also has a certain wind dispersion effect, thereby increasing the air discharge area and improving the softness of the air discharge. For the inner and outer rotors, there are no mechanical gears for transmission between the two, so there is no mechanical friction and collision, which can effectively reduce the noise generated by the transmission. In addition, the load fan blades driven by the inner rotor and the load fan blades driven by the outer rotor form a counter-rotating relationship. The fan blades corresponding to the inner rotor can disperse the wind, making the air discharge area larger and the wind feel softer.

[0115] Regarding the relative positions of the active rotor 1024, the driven rotor 1026 and the modulation ring 106, in another specific embodiment, as shown in FIG. Figure 10 As shown, the driving rotor 1024 and the driven rotor 1026 are respectively located on both axial sides of the modulation ring 106, that is, the modulation ring 106 is located in the middle position between the two in the axial direction, wherein the driving rotor 1024 can be arranged on the axial front side of the modulation ring 106, and the driven rotor 1026 is arranged on the axial rear side of the modulation ring 106, or the driving rotor 1024 can be arranged on the axial rear side of the modulation ring 106, and the driven rotor 1026 is arranged on the axial front side of the modulation ring 106. However, regardless of the arrangement adopted, the relative positional relationship between the driving rotor 1024 and the driven rotor 1026 in this solution is fixed, and they are axially stacked. The axial arrangement can reduce the radial size of the entire device.

[0116] Regarding the specific structure of the modulation ring 106, in one embodiment, the modulation ring 106 comprises a support plate 1062 and a magnetic conductive portion 1064. The support plate 1062 primarily supports and ensures air flow. Specifically, the support plate 1062 is provided with a plurality of openings 1063 for allowing air to pass through the structure, thereby ensuring air flow through the openings 1063. Furthermore, the magnetic conductive portions 1064 are evenly distributed around the support plate 1062. Under the action of the magnetic conductive portions 1064, when the driving rotor 1024 rotates, the driven rotor 1026 also rotates as the harmonic magnetic gears move away, achieving counter-rotation and speed regulation.

[0117] In this solution, the magnetic conductive portion 1064 extends axially, and one end is connected to the edge of the support plate 1062 . Such a connection can help fix the magnetic conductive portion 1064 on the support plate 1062 .

[0118] It should be added that the magnetic conductive part 1064 can be installed in many ways, such as the magnetic conductive part 1064 can be separated from the main body by a non-magnetic material, or the non-magnetic material can be separated from the main body by a magnetic conductive material. The non-magnetic conductive part 1064 can be air or plastic or other materials that do not have magnetic conductivity.

[0119] It can be understood that in this solution, there is a certain angle between the magnetic conductive portion 1064 and the support plate 1062 , the support plate 1062 extends in the radial direction, and the magnetic conductive portion 1064 extends in the axial direction.

[0120] In summary, the description of this modulation ring 106 includes two parts: the support plate 1062 and the magnetic conductive portion 1064. It is intended to influence the airflow and / or magnetic field distribution in the motor through the arrangement of the opening 1063 and the magnetic conductive portion 1064, so as to achieve more effective rotor motion control or improve motor performance.

[0121] Regarding the specific structure of the modulation ring 106, in another embodiment, the modulation ring 106 includes two parts: a support plate 1062 and a magnetic conductive portion 1064. The support plate 1062 mainly plays the role of supporting and ensuring air flow. Specifically, the magnetic conductive portion 1064 is evenly distributed around the support plate 1062. Under the action of the magnetic conductive portion 1064, when the active rotor 1024 rotates, the driven rotor 1026 also rotates according to the distance between the harmonic magnetic gears, and the rotation and speed regulation effects are achieved during the rotation.

[0122] In this solution, the magnetic conductive portion 1064 extends radially, that is, the magnetic conductive portion 1064 and the support plate 1062 are stacked or overlapped.

[0123] It should be added that the magnetic conductive part 1064 can be installed in many ways, such as the magnetic conductive part 1064 can be separated from the main body by a non-magnetic material, or the non-magnetic material can be separated from the main body by a magnetic conductive material. The non-magnetic conductive part 1064 can be air or plastic or other materials that do not have magnetic conductivity.

[0124] In one embodiment, a stator structure 104 is optionally provided coaxially with the active rotor 1024 to generate a magnetic field that surrounds the active rotor 1024. The stator structure 104 is provided on the outer periphery of the rotor structure 102 and is generally surrounded by a set of windings to generate a magnetic field that interacts with the magnetic field of the active rotor 1024 to generate a rotational force. Figure 5 As shown, the stator structure 104 includes at least one stator core 1042 arranged in the circumferential direction of the active rotor 1024, which changes the structure of the stator in the existing traditional motor, that is, there is no need to form a closed ring structure or a symmetrical structure in the circumferential direction inside or outside the active rotor 1024. It is only necessary to arrange at least one stator core 1042 corresponding to the rotor structure 102, that is, the stator structure 104 is arranged along the circumferential direction of the rotor structure 102 to drive the rotor structure 102 to rotate, thereby driving the load directly connected to the rotor structure 102 to move; at the same time, the setting position of the stator structure 104 can further reduce the overall volume and weight of the motor, especially the space occupied by the motor in the axial direction. For example, when the motor of the present invention is used in a fan, the motor mounting position behind the fan blades can be eliminated, which is conducive to achieving the flattening of the fan, reducing the weight of the fan head part and the eccentricity effect, reducing unnecessary counterweight settings, and improving the overall stability.

[0125] It can be understood that the stator structure 104 is a key part of the motor that generates a magnetic field. When current is passed through, the windings in the stator core 1042 generate a magnetic field, which interacts with the magnetic field of the active rotor 1024, thereby generating a rotational force to drive the rotation of the motor 108. It should also be emphasized that the stator structure 104 is arranged on one side of the rotor structure 102 according to the setting position of the rotor, so that the motor as a whole forms an eccentric structure. The setting position of the stator structure 104 is more flexible, making the motor suitable for loads of various structures. Optionally, the stator structure 104 can be arranged on the outside or inside of the rotor in the circumferential direction, or on one side of the rotor shaft 1022 in the axial direction, or at other positions according to the specific structure of the load.

[0126] Furthermore, part of the stator structure 104 generates a magnetic field that drives the rotation of part of the active rotor 1024. Specifically, after power is supplied to at least one stator core 1042, a part of the active rotor 1024, including one or more first magnets 1142, will be enclosed. Under the action of the magnetic field, part of the first magnets 1142 will drive the entire active rotor 1024 to rotate. Then, under the action of the modulation ring 106, the second magnets 1144 will be driven to rotate in the opposite direction, causing the driven rotor 1026 to rotate in a counter-rotating manner with the active rotor 1024.

[0127] It can be understood that the position of the stator structure 104 remains unchanged. When the active rotor 1024 rotates, the first magnet 1142 in the active rotor 1024 facing the stator structure 104 changes, but the area facing the stator structure 104 remains unchanged.

[0128] In one embodiment, the shapes of the stator structure 104 and the active rotor 1024 are limited. The stator structure 104 is not a complete closed figure, but rather an arc shape. When the active rotor 1024 is annular, the curvatures of the two are limited. That is, the surface of the stator structure 104 facing the active rotor 1024 is a first curved surface, and the curvature of this curved surface is the same as the curvature of the active rotor 1024. This ensures that the distance between the stator core 1042 and any first magnet 1142 remains constant, so that the driving force generated by the magnetic field on the first magnet 1142 is the same, thereby ensuring balance during rotation.

[0129] Furthermore, by limiting the active rotor 1024 to be annular, the stator structure 104 has a first curved surface that is arc-shaped and faces the active rotor 1024, and the curvature of at least a portion of the first curved surface is the same as that of the active rotor 1024, so that at least a portion of the first curved surface and the active rotor 1024 are equidistant from each other. This ensures that the driving force generated by at least a portion of the stator structure 104 on the active rotor 1024 remains balanced, which helps to improve the stability of the active rotor 1024 during rotation.

[0130] It can be understood that at least a portion of the arc surface of the first curved surface is parallel to the arc surface of the active rotor 1024 .

[0131] Optionally, the first curved surface is in an arc shape, the active rotor 1024 is in a circular ring shape, and the curvature of the first curved surface is the same as the curvature of the active rotor 1024 .

[0132] By defining the active rotor 1024 as an annular ring, the first curved surface as an arc, and the curvature of the first curved surface being the same as that of the active rotor 1024, the stator structure 104 and the active rotor 1024 are arranged at equal distances from each other. This ensures that the driving force exerted by the stator structure 104 on the active rotor 1024 remains constant during the rotation of the active rotor 1024, further improving the rotational stability of the active rotor 1024. It will be appreciated that changes in the magnitude of the driving force exerted by the stator structure 104 on the active rotor 1024 can easily cause changes in the rotational speed of the active rotor 1024, thereby affecting the rotational stability of the active rotor 1024.

[0133] The arc surface of the first curved surface is always parallel to the arc surface of the active rotor 1024 .

[0134] By limiting the active rotor 1024 to a circular ring shape, the stator structure 104 has an arc-shaped first curved surface facing the active rotor 1024, and the curvature of at least a portion of the first curved surface is the same as the curvature of the active rotor 1024, so that at least a portion of the first curved surface and the active rotor 1024 are equidistant from each other. This ensures that the driving force generated by at least a portion of the stator structure 104 on the active rotor 1024 remains balanced, which helps to improve the stability of the active rotor 1024 during rotation.

[0135] It can be understood that at least a portion of the arc surface of the first curved surface is parallel to the arc surface of the active rotor 1024 .

[0136] The stator core 1042 is provided with one or more stator teeth. By limiting the provision of multiple stator cores 1042 , a magnetic field force on the active rotor 1024 can be formed through two stator teeth, driving the active rotor 1024 to rotate, thereby driving the load to operate.

[0137] The stator structure 104 includes at least two stator teeth. The at least two stator teeth can be arranged on one stator core 1042 or on multiple stator cores 1042. That is, the number of stator cores 1042 is one or more, and the total number of stator teeth on all stator cores 1042 is at least two.

[0138] Furthermore, the number of stator teeth is at least two, and the stator windings on any two stator teeth are energized sequentially with the same polarity; or the number of stator teeth is at least two, and the stator windings on any two stator teeth are energized simultaneously with different polarities, and the magnetic poles of the stator windings on any two stator teeth alternate.

[0139] Stator core 1042 is provided with stator teeth. By limiting the number of stator teeth on stator core 1042 to at least two, and by sequentially energizing the stator windings on any two stator teeth with the same polarity, rotor structure 102 can be sequentially acted upon by the stator windings on the two stator teeth, generating forces in the same direction, causing rotor structure 102 to continuously rotate in the same direction. Furthermore, stator windings on any two stator teeth can be energized simultaneously with different polarities. By alternating the magnetic poles of the stator windings on any two stator teeth, a continuous force in the same direction is generated on rotor structure 102, driving rotor structure 102 to continuously rotate in the same direction. It should be noted that the stator teeth are positioned toward rotor structure 102 so that the magnetic field generated by the stator windings upon energization can drive the rotor, thereby driving rotor structure 102 to rotate the load.

[0140] It can be understood that at least two stator teeth can be provided on the same stator core 1042 or on different stator cores 1042 .

[0141] In some embodiments, the number of pole pairs corresponding to the driving rotor 1024 is optionally a first number of pole pairs, and the number of pole pairs corresponding to the driven rotor 1026 is optionally a second number of pole pairs. The number of magnetic conductive portions 1064 is determined based on the first and second numbers of pole pairs. In other words, the driving rotor 1024 and the driven rotor 1026 each have different numbers of pole pairs, and the number of magnetic conductive portions 1064 is the sum of these numbers of pole pairs. This design creates a specific magnetic field structure. When the modulation ring 106 is stationary, an external motor drives the driving rotor 1024 or the driven rotor 1026 to rotate synchronously. Under the action of the magnetic conductive portions 1064, the driving rotor 1024 and the driven rotor 1026 produce counter-rotation and speed regulation.

[0142] It can be understood that the number of pole pairs is inversely proportional to the rotational speed. For example, if the first pole pair number is greater than the second pole pair number, the rotational speed of the driving rotor 1024 is less than the rotational speed of the driven rotor 1026 .

[0143] Furthermore, the specific numbers of the first pole pairs and the second pole pairs are limited to 2 to 16, so as to improve the stability of the counter-rotation. It can be understood that if the number of pole pairs is less than 2, the corresponding rotor will have too few steps during rotation, which will cause jitter. If the number is greater than 16, the number of permanent magnets used is too large, the cost is higher, and the assembly is more complicated, which reduces the assembly efficiency.

[0144] When the active rotor 1024 rotates, the driven rotor 1026 will rotate in opposite directions under the action of the modulation ring 106. The angular velocities of the active rotor 1024 and the driven rotor 1026 are respectively the first angular velocity and the second angular velocity. By limiting the ratio of the first pole pair number to the second pole pair number to the negative inverse of the first angular velocity and the second angular velocity, that is, the sum of the ratio of the first pole pair number to the second pole pair number and the ratio of the second angular velocity to the first angular velocity is 0, so as to meet the principle of harmonic magnetic gears, thereby achieving the effects of counter-rotation and speed regulation.

[0145] In one embodiment, optionally, a rotor shaft 1022 carrying a driving rotor 1024 and a driven rotor 1026 is provided, and the two rotors are connected to the rotor shaft 1022, thereby reducing the resistance during the rotation process. It should be noted that the driving rotor 1024 and the driven rotor 1026 can be spaced apart in the axial direction of the rotor shaft 1022, such as Figure 3 As shown, the driving rotor 1024 and the driven rotor 1026 are respectively arranged on the rotor shaft 1022 through the bearings 112 of the rotor shaft 1022. Alternatively, the driving rotor 1024 and the driven rotor 1026 can be arranged at intervals in the radial direction of the rotor shaft 1022, that is, the two are nested inside and outside. In this case, the inner rotor located on the inner side is arranged on the rotor shaft 1022 through the bearings 112, and the outer rotor can be indirectly connected to the rotor shaft 1022 through the bearings 112 located outside the inner rotor.

[0146] In one embodiment, optionally, at least one of the active rotor 1024 and the driven rotor 1026 may be in the shape of a magnetic ring, such as Figure 11 As shown, Figure 11 The first magnet 1142 of the active rotor 1024 is in the shape of a magnetic ring. Alternatively, at least one of the two rotors may be a split, independent structure. In this case, the number of the first magnet 1142 and the second magnet 1144 may be one or more. The time the magnet is acted upon by the magnetic force varies depending on the circumferential length of the magnet. Specifically, the longer the magnet, the longer the time it is acted upon by the magnetic force of the stator structure 104. Even if the rotor includes only one magnet, as long as the circumferential length of the magnet is sufficiently long, it can still achieve continuous rotation under the action of the stator structure 104.

[0147] Furthermore, the rotor is a magnetic ring, which reduces the weight of individual magnets and contributes to the lightweighting of the motor. Furthermore, the magnetic sheets facilitate installation on the load. The ring structure formed by the magnetic sheets maintains balanced force during rotor rotation without excessively increasing the radial or axial thickness of the load, nor affecting its overall shape or structure.

[0148] In one embodiment, the first magnet 1142 and / or the second magnet 1144 are optionally arranged continuously along the circumferential direction so that the rotor structure 102 forms an annular belt structure, so that the rotor is subjected to a balanced magnetic force during rotation, which is conducive to maintaining the stability of the rotor during rotation.

[0149] In one embodiment, optionally, the first magnet 1142 and / or the second magnet 1144 are evenly arranged along the circumference, and there is a circumferential gap between any two adjacent magnets, so that the rotor forms an intermittent structure, and multiple magnets are arranged at intervals along the circumference, so that the magnitude and direction of the magnetic force acting on each magnet are the same, thereby maintaining the stability of the rotor during rotation.

[0150] In one embodiment, the active rotor 1024 and / or the driven rotor 1026 are optionally provided as an integral structure to facilitate installation and positioning of the rotors, reduce gaps between multiple magnets and the resulting shaking, and help reduce the possibility of magnet movement.

[0151] This embodiment provides a method for controlling the transmission mechanism 100 , including: controlling the active rotor 1024 to rotate; and causing the driven rotor 1026 to rotate along with the active rotor 1024 under the action of the magnetic conductive portions 1064 spaced apart on the modulation ring 106 .

[0152] While the modulation ring 106 is controlled to be stationary, the active rotor 1024 can be driven to rotate by an external motor or manually. Since the modulation ring 106 has a magnetic conductive portion 1064 capable of conducting magnetism, the N pole of the first magnet 1142 of the active rotor 1024 will emit magnetic lines of force. According to the principle of minimum magnetic resistance, these lines of force will pass through the magnetic conductive portion 1064 of the modulation ring 106 and attract the S pole of the second magnet 1144 of the driven rotor 1026 to move toward the magnetic conductive portion 1064, thereby achieving counter-rotation.

[0153] Furthermore, the rotational speed of the active rotor 1024 is different from the rotational speed of the driven rotor 1026 to achieve a counter-rotational differential speed, thereby diversifying the air outlet range when the air volume is large.

[0154] It can be understood that according to the principle of harmonic magnetic gears, the rotational speeds of the driving rotor 1024 and the driven rotor 1026 are different so as to achieve a counter-rotating effect.

[0155] like Figure 5 and Figure 7As shown, this embodiment provides a fan head structure 201, including a transmission mechanism 100 and fan blades, the fan blades are divided into a first fan blade 2022 and a second fan blade 2024, the first fan blade 2022 is connected to the active rotor 1024 through an active connection part, and the second fan blade 2024 is connected to the driven rotor 1026 through a driven connection part. The active rotor 1024 will drive the first fan blade 2022 to rotate under the action of the stator structure 104, and then drive the second fan blade 2024 to rotate under the action of the modulation ring 106, thereby realizing the operation of the fan head structure.

[0156] Since the fan head structure includes the transmission mechanism 100, it has the beneficial effects of any transmission mechanism 100 in the above-mentioned first embodiment, which will not be described in detail here.

[0157] In some embodiments, as Figure 4 As shown, the first fan blade 2022 is located radially outside the second fan blade 2024; and / or the diameter of the first fan blade 2022 is a first size, the diameter of the second fan blade 2024 is a second size, and the ratio of the first size to the second size is 0.3 to 0.8. The first fan blade 2022 can be located on the outside, and the second fan blade 2024 can be located on the inside. Of course, the sizes of the two fan blades can also be restricted, that is, the diameter of the second fan blade 2024 is the second size ΦD, and the diameter of the first fan blade 2022 is the first size Φd. The main function of the second fan blade 2024 is to provide air volume, and the first fan blade 2022, in addition to providing air volume, also has a wind dispersion effect. After fluid simulation analysis and experimental testing, when 0.3≤d / D≤0.8, the wind output effect is the best. When d / D<0.3, the air output of the first fan blade 2022 is small and the wind dispersion effect is not good; and when d / D>0.8, the effective working area of ​​the second fan blade 2024 is reduced, and the air volume is insufficient. Since the two fan blades are an internal and external nested structure, the axial length will not be increased, so the head is thinner and easier to store.

[0158] Furthermore, the rotational speeds of the first blade 2022 and the second blade 2024 are different to achieve counter-rotational differential speed, thereby spreading the air outlet range when a large air volume is output.

[0159] like Figure 7 As shown, this embodiment provides a fan assembly 200, including a fan head structure and a wind cover assembly. The wind cover assembly can protect the fan head structure and also improve the safety of the equipment.

[0160] The fan cover assembly includes a first fan cover 2042 and a second fan cover 2044. The first fan cover 2042 and the second fan cover 2044 are detachably connected to form a receiving cavity inside. The rotor and the fan blades are received in the receiving cavity. The stator structure 104 can be correspondingly arranged in multiple positions. When the stator structure 104 is arranged in the receiving cavity, the motor can be placed in the receiving cavity as a whole. The first fan cover 2042 and the second fan cover 2044 protect the motor and the fan blades to prevent interference with external objects during the process of the motor driving the fan blades to rotate. When the stator structure 104 is arranged outside the receiving cavity, it is beneficial to reduce space occupation and facilitate the disassembly and assembly of the stator structure 104. When the stator structure 104 includes multiple stator cores 1042, the stator cores 1042 can also be arranged inside and outside the receiving cavity at the same time. In addition, the first fan cover 2042 and the second fan cover 2044 are detachable to facilitate maintenance or cleaning of the motor and the fan blades.

[0161] In some embodiments, a base 206 is provided that is detachably connected to the fan blades to facilitate use of the fan head structure and cleaning and maintenance of the fan blades. The stator structure 104 is provided on the base 206, meaning that the stator structure 104 can be removed independently of the rotor structure 102, facilitating separate cleaning and maintenance of the stator structure 104 and the rotor structure 102. It is understood that the stator and rotor of a conventional motor are typically integrally mounted, making it difficult to clean the interior of the motor. Dust and other impurities adhering to the interior can easily affect the normal operation of the motor.

[0162] The base 206 includes a seat post 2062 and a support frame 2064. The seat post 2062 serves as the bottom of the entire base 206 and directly contacts a supporting surface such as a table or the ground via a placement surface at one end thereof. The placement surface is generally the ground surface of the base 206. The support frame 2064 is disposed at the other end. The fan shield assembly can be fixed relative to the ground by assembly with the support frame 2064, thereby achieving airflow in a specific direction. The support frame 2064 can be U-shaped, with the stator structure 104 adapted to the shape of the support frame 2064. At least a portion of the fan shield assembly will be located within the support frame 2064, allowing assembly to be achieved using the support frame 2064.

[0163] In one embodiment, optionally, Figure 8 As shown, the inner rotor is directly driven by the drive motor 108. At this time, the modulation ring 106 transmits power to the outer rotor, thereby achieving a differential rotation effect between the inner and outer rotors. It can be understood that because the drive motor 108 directly transmits power to the inner rotor, the inner rotor rotates at a higher speed, while the outer rotor rotates at a slower speed relative to the inner rotor.

[0164] In one embodiment, optionally, Figure 9As shown, the inner rotor and the outer rotor are independently driven by motors, that is, the inner rotor is driven by the first motor 1102, and the outer rotor is driven by the second motor 1104. In this solution, the modulation ring 106 is not provided, which is equivalent to directly controlling the rotation speed of each of the inner rotor and the outer rotor, thereby meeting the design requirements of counter-rotation.

[0165] In a specific embodiment, a fan head structure 201 is proposed, which includes a motor, a stator assembly, a support assembly, a front mesh cover, a counter-rotating fan blade assembly and a rear mesh cover, wherein the counter-rotating fan blade assembly is composed of a first fan blade 2022, a modulation ring (i.e., the modulation ring 106) and a second fan blade 2024 and is nested in sequence, the rotor shaft 1022 is fastened to the modulation ring, the first fan blade 2022 and the second fan blade 2024 are respectively sleeved on the rotor shaft 1022 through a number of bearings 112, the counter-rotating fan blade assembly is installed on the front mesh cover (i.e., the first wind cover 2042) and the rear mesh cover (i.e., the second wind cover 2044) through the rotor shaft 1022 to form a head assembly; the stator assembly and the head assembly are installed on the support assembly.

[0166] The diameter of second blade 2024 is ΦD, and the diameter of first blade 2022 is Φd. Second blade 2024 primarily provides airflow, while first blade 2022 also disperses the air. Fluid simulation analysis and experimental testing show that the airflow is optimal when 0.3 ≤ d / D ≤ 0.8. When d / D < 0.3, first blade 2022 produces a low airflow and poor dispersion. When d / D > 0.8, the effective working area of ​​second blade 2024 decreases, resulting in insufficient airflow. Because the two blades are nested, this does not increase the axial length, resulting in a thinner and more compact head.

[0167] The inner rotor, modulation ring and outer rotor are nested in sequence and separated by air gaps, which are L1 and L2 respectively. There are several circumferentially evenly distributed permanent magnets or magnetic rings on the inner rotor and the outer rotor. The number of pole pairs of the inner rotor is P. in , the number of pole pairs of the outer rotor is P out The modulation ring is designed with a magnetic conductive portion 1064 (tooth portion) on the coupling surface with the inner rotor and the outer rotor. The magnetic conductive portion 1064 (tooth portion) is evenly distributed along the circumference. The number of teeth in the magnetic conductive portion 1064 is PS, and the magnetic conductive teeth are separated by air or non-magnetic material.

[0168] The number of pole pairs of the inner and outer rotors and the design of the modulation ring magnetic part 1064 are P S =P in +P out When the modulation ring is fixed and the external motor drives the inner rotor or outer rotor to rotate synchronously, since there is a magnetic conductive portion 1064 on the modulation ring, it is assumed that the angular velocity of the inner rotor is expressed as ω i , the outer rotor angular velocity is expressed as ω o, according to the principle of harmonic magnetic gear, it will follow ω i =-ω o ×P out / P in , so as to achieve the effect of counter-rotation and speed regulation. In order to improve the stability of counter-rotation, the pole pairs of the inner and outer rotors are designed to be 2≤P in ≤16,2≤P out ≤16, when the number of pole pairs is <2, the number of steps of the rotor during rotation is too small, which easily causes jitter. When the number of pole pairs is >16, more permanent magnets are used, which is costly.

[0169] Furthermore, the modulation ring can be driven by an external motor to rotate synchronously, and the first blade 2022 and the second blade 2024 will also follow the above principle, thereby achieving the effect of counter-rotation and speed regulation.

[0170] Furthermore, in combination with the inner and outer nested fan blades, the inner rotor and outer rotor of the magnetic gear drive are respectively combined with the inner and second fan blades 2024 of the inner and outer nested fan blades, and a modulation ring is added in the middle. In this way, the inner second fan blade 2024 can achieve counter-rotation and speed regulation, and the first fan blade 2022 can disperse the wind, making the wind outlet area larger and the user feel better.

[0171] The outer ring of the second fan blade 2024 is embedded with magnets with N and S alternating circumferential arrangements with a pole pair number of P. The stator is designed as a non-closed semi-enclosed structure. The stator has at least 2 coils (2 require steering auxiliary devices, more than 3 do not, and a multiple of 3 is optimal). The stator assembly and the fan assembly 200 (counter-rotating blade assembly) are eccentrically arranged.

[0172] In general, the principle of this solution is as follows: the first fan blade 2022 and the second fan blade 2024 are nested. The second fan blade 2024 mainly provides air volume, while the first fan blade 2022 (in addition to providing air volume, also has the effect of dispersing wind, making the air outlet area larger and the air outlet softer. The two fan blades are nested inside and outside, which does not increase the axial length L, so the head is thinner and easier to store; the number of inner and outer rotor poles and the design of the modulation ring magnetic part 1064 P S =P in +P out When the modulation ring is fixed and the external motor drives the inner rotor or outer rotor to rotate synchronously, since there is a magnetic conductive portion 1064 on the modulation ring, it is assumed that the angular velocity of the inner rotor is expressed as ω i , the outer rotor angular velocity is expressed as ω o When the magnetic lines of force emitted by the N pole of the outer rotor magnet pass through the magnetic conductive portion 1064 on the modulation ring according to the principle of minimum magnetic resistance, they attract the S pole of the inner rotor to move the magnetic conductive portion 1064, thereby achieving counter-rotation. According to the principle of harmonic magnetic gear, i =-ω o ×P out / Pin , thereby achieving the effect of counter-rotation and speed regulation.

[0173] The motor (composed of a stator assembly and fan blades) has a stator and rotor separated design. The motor stator and fan blades are eccentrically installed. There are only n (n is an integer greater than 2) windings on the stator, and the rotor is arranged on the fan head structure 201 (fan blades). When the sequence of the stator circuit opening / closing time is controlled, a tangential interaction force can be generated on the rotor on the fan head structure 201, thereby causing the fan head structure 201 to operate. In addition, since the stator is a non-enclosed design, the head can be separated from the base, and the head part is not electrified, so the user can disassemble and clean it, and it is convenient to store and safer.

[0174] The following effects can be achieved: there is no mechanical gear transmission between the inner and outer rotors, and no mechanical friction and collision will be generated, thereby effectively reducing the noise generated by the transmission; the second inner fan blade 2024 rotates in opposite directions, and the first fan blade 2022 can disperse the wind, making the wind outlet area larger and the wind feeling softer; the stator and rotor are separated by magnetic drive, the stator is fixedly installed on the base, and the rotor is combined with the fan blades, so that the head and the base can be detachable, and the wind and electricity are separated, which is convenient for users to disassemble, clean and store, and is safer.

[0175] Furthermore, the motor can drive the first blade 2022, which is then transmitted to the second blade 2024 via a magnetic gear, achieving a differential counter-rotation effect. Alternatively, the intermediate modulation ring can be eliminated, and dual motors can be used to drive the first blade 2022 and the second blade 2024, respectively. Alternatively, an axial magnetic gear transmission can be used. Alternatively, the magnets can be replaced with magnetic rings.

[0176] According to the transmission mechanism, counter-rotation control method, fan head structure and fan assembly provided by the present invention, under the action of the modulation ring, the counter-rotation of the driven rotor is achieved when the active rotor rotates.

[0177] In the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0178] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0179] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0180] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A transmission mechanism, characterized in that: include: An active rotor, wherein at least one first magnet is provided on the active rotor and the active rotor is used to connect to the active working part; A driven rotor, wherein at least one second magnet is provided on the driven rotor and the driven rotor is used to connect to the driven working part; a modulation ring, disposed between the driving rotor and the driven rotor, the modulation ring comprising magnetic conductive portions spaced apart along the circumferential direction; The axis of the active rotor, the axis of the modulation ring and the axis of the driven rotor are collinear, and the modulation ring is used to drive the driven rotor to rotate when the active rotor rotates.

2. The transmission mechanism according to claim 1, characterized in that: There is a first air gap between the driving rotor and the modulation ring, and a second air gap between the driven rotor and the modulation ring.

3. The transmission mechanism according to claim 2, characterized in that: One of the driving rotor and the driven rotor is arranged radially inward of the modulation ring, and the other is arranged radially outward of the modulation ring.

4. The transmission mechanism according to claim 3, characterized in that: The modulation ring comprises: A support plate, wherein a plurality of openings are provided on the support plate; The plurality of magnetic conductive portions are spaced apart along the circumference of the support plate, and the magnetic conductive portions extend along the axial direction of the active rotor; Wherein, a non-magnetic conductive portion is formed between two adjacent magnetic conductive portions.

5. The transmission mechanism according to claim 2, characterized in that: The driving rotor and the driven rotor are respectively arranged on two axial sides of the modulation ring.

6. The transmission mechanism according to claim 5, characterized in that: The modulation ring comprises: Support plate; The plurality of magnetic conductive portions are spaced apart along the circumference of the support plate, and each of the magnetic conductive portions extends outwardly along the radial direction of the active rotor on the support plate; Wherein, a non-magnetic conductive portion is formed between two adjacent magnetic conductive portions.

7. The transmission mechanism according to claim 1, characterized in that: include: The stator structure is coaxially arranged with the active rotor, and the stator structure includes a stator core for driving the active rotor to rotate.

8. The transmission mechanism according to claim 7, characterized in that: Also includes: The driving area includes at least one stator core and a portion of the first magnet in the active rotor facing the stator structure.

9. The transmission mechanism according to claim 8, characterized in that: The stator structure has a first curved surface facing the active rotor. The first curved surface is arc-shaped. The active rotor is annular. The curvature of at least part of the first curved surface is the same as that of the active rotor.

10. The transmission mechanism according to claim 7, characterized in that: There are multiple stator cores, each of which is provided with at least one stator tooth, and the multiple stator cores are arranged along the circumference of the active rotor.

11. The transmission mechanism according to claim 1, characterized in that: The driving rotor has a first number of pole pairs, the driven rotor has a second number of pole pairs, and the number of the magnetic conductive parts is a third number; The first number of pole pairs is different from the second number of pole pairs, and the third number is the sum of the first number of pole pairs and the second number of pole pairs.

12. The transmission mechanism according to claim 11, characterized in that: The number of the first pole pairs ranges from 2 to 16, and the number of the second pole pairs ranges from 2 to 16.

13. The transmission mechanism according to claim 11, characterized in that: The driving rotor has a first angular velocity, the driven rotor has a second angular velocity, and a sum of a ratio of the first pole pair number to the second pole pair number and a ratio of the second angular velocity to the first angular velocity is zero.

14. The transmission mechanism according to claim 1, wherein: Also includes: a rotor shaft, the driving rotor and the driven rotor being connected to the rotor shaft via bearings; The rotational speed of the driving rotor is different from the rotational speed of the driven rotor to achieve counter-rotation differential.

15. The transmission mechanism according to claim 1, characterized in that: The active rotor and / or the driven rotor are magnetic rings; and / or The active rotor and / or the driven rotor are / is a split independent structure.

16. The transmission mechanism according to claim 1, characterized in that: The first magnet and / or the second magnet are arranged continuously along the circumferential direction; or The first magnets and / or the second magnets are uniformly arranged along the circumferential direction, and a circumferential gap exists between any two adjacent first magnets and / or between any two adjacent second magnets; or The driving rotor and / or the driven rotor are / is an integrated structure.

17. A counter-rotation control method, characterized in that: For the transmission mechanism according to any one of claims 1 to 16, the counter-rotation control method comprises: controlling the rotation of the active rotor; Under the action of the magnetic conductive parts arranged at intervals on the modulation ring, the driven rotor rotates together with the driving rotor.

18. The counter-rotation control method according to claim 17, characterized in that: The rotational speed of the driving rotor is different from the rotational speed of the driven rotor to achieve counter-rotation differential.

19. A fan head structure, characterized in that: include: The transmission mechanism according to any one of claims 1 to 16; a first fan blade connected to the active rotor of the transmission mechanism via an active connection portion; The second fan blade is connected to the driven rotor of the transmission mechanism through a driven connecting portion.

20. The fan head structure according to claim 19, characterized in that: The driving rotor has a first number of pole pairs, and the driven rotor has a second number of pole pairs, wherein the first number of pole pairs is different from the second number of pole pairs; Among them, if the first pole pair number is greater than the second pole pair number, the rotational speed of the first fan blade is less than the rotational speed of the second fan blade; if the first pole pair number is less than the second pole pair number, the rotational speed of the first fan blade is greater than the rotational speed of the second fan blade.

21. The fan head structure according to claim 19, characterized in that: The first blade is located radially outward of the second blade; and / or The diameter of the first fan blade is a first size, the diameter of the second fan blade is a second size, and the ratio of the first size to the second size is 0.3 to 0.

8.

22. The fan head structure according to claim 19, characterized in that: The first blade and the second blade have different rotational speeds to achieve counter-rotational differential speed.

23. A fan assembly, characterized in that: include: The fan head structure according to any one of claims 19 to 22; The fan cover assembly is used to accommodate the fan head structure.

24. The fan assembly according to claim 23, wherein The wind shield assembly comprises: A first wind shield and a second wind shield are detachably connected, wherein the second wind shield forms an accommodating cavity for accommodating at least the first fan blade, the second fan blade and part of the transmission mechanism when the second wind shield is connected to the first wind shield. Wherein, the stator structure of the transmission mechanism is arranged outside the accommodating cavity.

25. The fan assembly according to claim 23, wherein Also includes: A base, the stator structure of the fan head structure is arranged on the base, and the base is detachably connected to the wind cover assembly.

26. The fan assembly according to claim 25, wherein The base comprises: A seat post, wherein one end of the seat post is provided with a placement surface; A support frame is connected to an end of the seat rod away from the placement surface. The shape of the support frame is adapted to the shape of the stator structure. The wind shield assembly is detachably connected to the support frame.

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