Neodymium iron boron permanent magnet brushless motor

Abstract

The neodymium iron boron permanent magnet brushless motor comprises a plurality of air guide assemblies arranged at the end of a motor body corresponding to a main shaft, a plurality of circulation grooves are formed in the outer side of the motor body in the y-axis direction, the air outlet direction of the air guide assemblies is arranged in the y-axis direction, and the air guide assemblies correspond to the circulation grooves. The projection of the circulation groove in the y-axis direction is located on the air guide assembly, the main shaft is connected with the air guide assembly, and the main shaft is used for driving the air guide assembly to operate so that air can circulate in the circulation groove; the air guide assembly comprises fan blades and a connecting unit, the main shaft, the connecting unit and the fan blades are sequentially connected, and the fan blades are driven by the connecting unit to reciprocate corresponding to the circulating groove in the y-axis direction and rotate to discharge air. Through cooperation of fan blade rotation and fan blade reciprocating motion, the effect of promoting air circulation can be achieved, the airflow speed is remarkably increased, heat exchange is accelerated, the heat dissipation rate of the motor is accordingly increased, and then the situation that the neodymium iron boron permanent magnets in the motor are irreversible demagnetized due to high temperature, and the magnetic performance is attenuated is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of brushless motors, and particularly to a neodymium iron boron permanent magnet brushless motor. Background Art

[0002] The neodymium iron boron permanent magnet brushless motor is a highly efficient electric motor widely used in industrial and consumer electronic devices. Its core feature is the use of an iron-based boron alloy as the permanent magnet. This material has excellent magnetic properties, can provide a strong magnetic field, enabling the motor to have a high power density and high efficiency. The design of the brushless motor eliminates the traditional brushes and commutators, and uses an electronic control system to regulate the current, thereby achieving smooth rotation, reducing wear, and extending the service life.

[0003] In the current structure of the neodymium iron boron permanent magnet brushless motor, usually the neodymium iron boron permanent magnet is directly embedded in the motor rotor core, and energy conversion is achieved through the electromagnetic coupling of the stator winding. However, when the motor operates under high load for a long time or in a high-temperature environment, the neodymium iron boron permanent magnet is prone to reach the critical demagnetization temperature due to heat accumulation, resulting in magnetic performance attenuation, thereby causing irreversible flux loss. When the temperature of the neodymium iron boron permanent magnet approaches or exceeds its Curie point, its lattice structure undergoes a phase change, the magnetic domain arrangement becomes disordered, and the coercivity (Hc) and remanence (Br) decrease significantly, directly affecting the motor output torque and efficiency. After the neodymium iron boron permanent magnet demagnetizes, the air gap magnetic field of the motor is distorted, triggering a vicious cycle of increased harmonic losses and increased temperature rise, further accelerating the magnetic performance attenuation, thus reducing the motor efficiency.

[0004] Therefore, a neodymium iron boron permanent magnet brushless motor is proposed to solve the technical problem that the neodymium iron boron permanent magnet brushless motor is prone to magnetic performance attenuation in the above-mentioned high-load operation or high-temperature environment. Summary of the Invention

[0005] The purpose of the present invention is to provide a neodymium iron boron permanent magnet brushless motor to solve the problem that the neodymium iron boron permanent magnet brushless motor is prone to magnetic performance attenuation in high-load operation or high-temperature environment.

[0006] To achieve this purpose, the present invention adopts the following technical solutions: A neodymium iron boron permanent magnet brushless motor includes a plurality of air guiding components arranged at the end of the motor body corresponding to the main shaft. A plurality of flow-through grooves are opened on the outer side of the motor body along the y-axis direction. The air outlet direction of the air guiding components is arranged along the y-axis direction and corresponds to the flow-through grooves. The projection of the flow-through grooves in the y-axis direction is located on the air guiding components. The main shaft is connected to the air guiding components, and the main shaft is used to drive the air guiding components to operate so that air circulates in the flow-through grooves; The air guiding components include fan blades and a connecting unit. The main shaft, the connecting unit, and the fan blades are connected in sequence. The fan blades are driven by the connecting unit to reciprocate along the y-axis direction corresponding to the flow-through grooves and rotate to blow out air.

[0007] Preferably, the connecting unit includes a support column, a connecting rod and a sleeve body. The connecting rod is vertically fixed on the outer periphery of the sleeve body. A guiding groove is formed at a position on the outer periphery of the main shaft close to the end of the motor body. One end of the connecting rod away from the sleeve body is slidably connected in the guiding groove. The support column is fixed on the end of the motor body corresponding to the main shaft along the y-axis direction. The sleeve body is sleeved on the support column. The connecting rod slides in the guiding groove, causing the sleeve body to make a reciprocating movement on the support column. The fan blade is arranged on the sleeve body. The fan blade rotates along with the reciprocating movement of the sleeve body, enabling the air in the flow channel to circulate. And when the rotating sleeve moves towards the flow channel, the fan blade rotates to blow air into the flow channel.

[0008] Preferably, the sleeve body includes a rotating sleeve, a moving sleeve and a slider. The rotating sleeve is rotatably connected in the moving sleeve and is sleeved on the support column. The connecting rod is vertically fixed on the outer periphery of the moving sleeve. The connecting rod slides in the guiding groove, causing the rotating sleeve to make a reciprocating movement on the support column through the moving sleeve. The slider is vertically fixed on the inner wall of the rotating sleeve. A spiral groove is formed on the outer periphery of the support column. One end of the slider away from the rotating sleeve is slidably connected in the spiral groove. The rotating sleeve rotates during the reciprocating movement through the slider after the reciprocating movement. The fan blade is fixed on the rotating sleeve. Preferably, the spiral groove is centrally distributed on the support column, and there is a reserved space at both ends of the spiral groove and both ends of the support column. The spiral groove is of the same length as the guiding groove. The outer diameter of the connecting rod is adapted to the width of the inner cavity of the guiding groove. The outer diameter of the slider is adapted to the width of the inner cavity of the spiral groove.

[0009] Preferably, a cover body is fixed on the end of the motor body corresponding to the main shaft. The air guiding assembly is located inside the cover body. The cover body is a cylinder with a hollow interior and missing on one side close to the motor body. The internal space of the cover body is communicated with the internal space of the flow channel. The cover body includes a support member and a support plate. The support plate is fixed inside the support member, and a number of round holes are formed on the support plate. One end of the support column away from the end of the motor body corresponding to the main shaft is connected to the support plate.

[0010] Preferably, the support plate, the fan blade and the flow channel are distributed along the y-axis direction. When the rotating sleeve moves towards the flow channel, the fan blade rotates to blow air towards the flow channel; when the rotating sleeve moves towards the round holes, the fan blade rotates to blow air towards the round holes.

[0011] Preferably, a guiding surface inclined towards the flow channel is formed at a position on the motor body corresponding to the end of the main shaft and close to the flow channel.

[0012] Preferably, the inner wall of the flow channel is inclined inwards, and the inclination angle is 5 - 15°.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention discloses a brushless motor with a neodymium iron boron permanent magnet, which allows air to circulate in a circulation slot by rotating fan blades, and with the cooperation of the reciprocating movement of the fan blades, can promote the circulation of air and significantly increase the air flow rate. During the movement, the fan blades directly push the air into the narrow circulation slot, increasing the air flow rate passing through the slot per unit time, accelerating the heat exchange, thereby increasing the heat dissipation rate of the motor and the cooling effect, thereby avoiding the irreversible demagnetization of the neodymium iron boron permanent magnet in the motor due to high temperature, which causes the magnetic properties to decay.

[0014] 2. The present invention provides a NdFeB permanent magnet brushless motor, which, through structures such as guide grooves, connecting rods, slider spiral grooves and rotating sleeves, can allow the fan blades to rotate and discharge air while cooperating with reciprocating movements to form two-way alternating air discharge. When the fan blades move toward the flow groove, they push air into the groove for heat dissipation; when they move in the opposite direction, they draw external air into the flow groove to form a continuous circulating airflow. In this way, the air circulation efficiency is significantly improved, and local heat accumulation caused by unidirectional airflow is avoided. The two-way air discharge method breaks the airflow stability and enhances the uniformity of heat dissipation. At the same time, the reciprocating motion of the fan blades further increases air disturbance and reduces flow resistance.

[0015] 3. The present invention is a brushless NdFeB permanent magnet motor, which directly drives the wind guide assembly through the main shaft, without the need for an independent motor or external power source. The main shaft rotates to drive the connecting unit to link the fan blades. This method reduces energy loss and avoids the use of additional power sources to occupy space, making the motor structure more compact, particularly suitable for industrial equipment or precision electronic equipment with limited space, while reducing system complexity and improving reliability. The linkage design of the main shaft and the heat dissipation system reflects the advantages of mechatronics, taking into account the needs of efficient heat dissipation and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0018] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the disassembled structure of the motor body and the cover body in the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at position A in; Figure 4 Schematic diagram of the sectional structure of the flow channel in the present invention; Figure 5 Schematic diagram of the rear view structure of the cover body in the present invention; Figure 6 Schematic diagram of the overall structure of the air guiding component in the present invention; Figure 7 Schematic diagram of the connection structure between the guiding groove and the connecting rod in the present invention; Figure 8 Schematic diagram of the disassembled structure of the rotating sleeve and the moving sleeve in the present invention; Figure 9 Schematic diagram of the internal structure of the rotating sleeve in the present invention; Figure 10 For the present invention Figure 9 Schematic diagram of the enlarged structure of B in; Figure 11 Schematic diagram of the disassembled structure of the support member and the support plate in the present invention; Figure 12 Front view structure schematic diagram of the support plate in the present invention.

[0019] Illustration: 1. Motor body; 11. Flow channel; 12. Guiding surface; 2. Main shaft; 21. Guiding groove; 3. Air guiding component; 31. Fan blade; 32. Connection unit; 321. Support column; 322. Rotating sleeve; 323. Slide block; 324. Moving sleeve; 325. Connecting rod; 326. Spiral groove; 4. Cover body; 41. Support member; 42. Support plate; 43. Round hole. Detailed implementation manners

[0020] In order to make the invention objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present.

[0022] Embodiment 1: Please refer to Figures 1-12 , a neodymium iron boron permanent magnet brushless motor in this embodiment includes a plurality of air guiding components 3 arranged at the end of the motor body 1 corresponding to the main shaft 2. A plurality of flow channels 11 are opened on the outer side of the motor body 1 along the y-axis direction. The air outlet direction of the air guiding component 3 is arranged along the y-axis direction and corresponds to the flow channels 11. The projection of the flow channels 11 in the y-axis direction is located on the air guiding component 3. The main shaft 2 is connected to the air guiding component 3, and the main shaft 2 is used to drive the air guiding component 3 to operate so that air circulates in the flow channels 11; the air guiding component 3 includes a fan blade 31 and a connecting unit 32. The main shaft 2, the connecting unit 32, and the fan blade 31 are connected in sequence. The fan blade 31 reciprocates along the y-axis direction corresponding to the flow channels 11 under the drive of the connecting unit 32 and rotates to blow out air.

[0023] During application, after the motor body 1 operates, its main shaft 2 will rotate. When the main shaft 2 rotates, it will cause the air guiding component 3 to work. After working, the air guiding component 3 blows out air and makes the air flow into the flow channels 11. When the air circulates in the flow channels 11, it can take away the heat generated during the operation of the motor body 1 and the heat accumulated on the motor body 1 due to the high-temperature environment, thereby cooling the motor body 1 to avoid the situation that the magnetic performance of the neodymium iron boron permanent magnet decays due to the too high temperature of the motor body 1, which affects the use performance of the motor body 1. Moreover, during the process of the air guiding component 3 blowing out air, under the action of the connecting unit 32, the fan blade 31 can also reciprocate in the direction of the flow channels 11 while rotating. Under the reciprocating movement of the fan blade 31, when the air flows into the flow channels 11, it can further push the air to increase the air flow rate, so that more heat can be taken away during the process of the air circulating in the flow channels 11, thereby improving the cooling effect on the motor body 1; specifically, when the main shaft 2 rotates to make the fan blade 31 rotate through the connecting unit 32 and move in the direction of the flow channels 11, the connecting unit 32 makes the fan blade 31 move to form a thrust. Through the formed thrust and the rotation of the fan blade 31, the air is further pushed, and the air flow rate is increased.

[0024] It should be noted that when the neodymium iron boron permanent magnet in the brushless motor of the neodymium iron boron permanent magnet works, after its own temperature exceeds the maximum temperature, irreversible demagnetization will occur, resulting in the attenuation of magnetic properties; the principle and conditions for the irreversible demagnetization of the neodymium iron boron permanent magnet are well known to those skilled in the art, and will not be described in this embodiment.

[0025] In addition, by running the rotation of the main shaft 2 through the operation of the motor body 1 to drive the operation of the air guiding component 3, there is no need to provide an additional power source for the air guiding component 3, avoiding the energy loss of the additional power source, reducing the overall energy consumption, and there is no need to provide a placement space for the additional power source, saving space, so as to facilitate the application of the motor body 1 in occasions with limited space.

[0026] Embodiment 2: The basic content is the same as that of Embodiment 1, the difference is: Please refer to Figures 5-12 , the connecting unit 32 in this embodiment includes a support column 321, a connecting rod 325 and a sleeve. The connecting rod 325 is vertically fixed on the outer periphery of the sleeve. A guiding groove 21 is formed at a position on the outer periphery of the main shaft 2 close to the end of the motor body 1. One end of the connecting rod 325 away from the sleeve is slidably connected in the guiding groove 21. The support column 321 is fixed on the end of the motor body 1 corresponding to the main shaft 2 along the y-axis direction. The sleeve is sleeved on the support column 321. The connecting rod 325 slides in the guiding groove 21, so that the sleeve makes a reciprocating movement on the support column 321. The fan blade 31 is arranged on the sleeve. The fan blade 31 rotates with the reciprocating movement of the sleeve, so that the air in the flow channel 11 circulates, and when the rotating sleeve 322 moves towards the flow channel 11, the fan blade 31 rotates and blows air into the flow channel 11.

[0027] During application, after the main shaft 2 rotates, the connecting rod 325 will reciprocate along the y-axis direction through the guiding groove 21. After the connecting rod 325 moves, the sleeve will reciprocate and rotate on the support column 321. The fan blade 31 rotates and blows air under the rotation of the sleeve, so as to make the air in the flow channel 11 circulate and cool the motor body 1.

[0028] It should be noted that the shape of the guiding groove 21 is similar to the shape of the groove on the reciprocating lead screw (the specific structure of the reciprocating lead screw can refer to the reciprocating lead screw disclosed in Chinese Patent Publication No.: CN210335517U). After the main shaft 2 rotates, through the cooperation of the guiding groove 21 and the connecting rod 325, the sleeve can reciprocate and rotate on the support column 321, so that the fan blade 31 rotates and blows air.

[0029] Specifically, the sleeve body includes a rotating sleeve 322, a moving sleeve 324 and a slider 323. The rotating sleeve 322 is rotatably connected inside the moving sleeve 324, and the rotating sleeve 322 is sleeved on the support column 321. The connecting rod 325 is vertically fixed on the outer periphery of the moving sleeve 324. The connecting rod 325 slides in the guiding groove 21. By means of the moving sleeve 324, the rotating sleeve 322 makes a reciprocating movement on the support column 321. The slider 323 is vertically fixed on the inner wall of the rotating sleeve 322. A spiral groove 326 is formed on the outer periphery of the support column 321. One end of the slider 323 away from the rotating sleeve 322 is slidably connected in the spiral groove 326. After the reciprocating movement of the rotating sleeve 322, the rotating sleeve 322 rotates during the reciprocating movement through the slider 323. The fan blade 31 is fixed on the rotating sleeve 322.

[0030] During application, after the connecting rod 325 moves, the rotating sleeve 322 will make a reciprocating movement on the support column 321 through the moving sleeve 324. Along with the movement of the rotating sleeve 322, the slider 323 will also move in the spiral groove 326, so that the rotating sleeve 322 rotates during the movement, and the rotating rotating sleeve 322 drives the fan blade 31 to rotate to make the air in the flow-through groove 11 flow.

[0031] It should be noted that, with the cooperation of the guiding groove 21 and the connecting rod 325, the moving sleeve 324 and the rotating sleeve 322 can move on the support column 321, and the two are limited by the support column 321. At the same time, the spiral groove 326 is formed on the support column 321 along the circumferential direction of the support column 321. When the rotating sleeve 322 moves, the rotating sleeve 322 will rotate through the cooperation of the spiral groove 326 and the slider 323, so as to realize the rotation of the fan blade 31. Specifically, through the rotation of the main shaft 2, with the cooperation of the guiding groove 21 and the connecting rod 325, the moving sleeve 324 and the rotating sleeve 322 make a reciprocating movement. The rotating sleeve 322 during the reciprocating movement rotates under the action of the slider 323 and the spiral groove 326, and the rotating sleeve 322 drives the fan blade 31 to rotate, so that the fan blade 31 rotates to blow air. The specific structural shape of the reciprocating lead screw is well known to those skilled in the art, and will not be described in this embodiment.

[0032] It should also be noted that when the main shaft 2 rotates and through the cooperation of the guiding groove 21 and the connecting rod 325, when the moving sleeve 324 and the rotating sleeve 322 move towards the flow-through groove 11, the fan blade 31 rotates to blow air into the flow-through groove 11, so that the air enters the flow-through groove 11. At the same time, when the moving sleeve 324 and the rotating sleeve 322 move away from the flow-through groove 11, the fan blade 31 blows air away from the flow-through groove 11, so that the air around the flow-through groove 11 can enter the flow-through groove 11 and be discharged from the flow-through groove 11. Through the reciprocating movement of the rotating sleeve 322, the rotating fan blade 31 can realize the alternate air blowing in two opposite directions.

[0033] It can be known that the fan blades 31 and the movable sleeve 324 are integrated on the rotating sleeve 322. Through the cooperation of the guide groove 21 and the connecting rod 325, and the cooperation of the slider 323 and the threaded groove, the fan blades 31 are rotated to discharge air and reciprocate. In this way, the rotation and reciprocating movement of the fan blades 31 are linked, the structure is simplified, the structure is made more compact, and the air circulation effect is significantly improved; at the same time, after the slider 323 moves in the spiral groove 326 to realize one rotation, the rotating sleeve 322 and the fan blades 31 rotate synchronously for one circle. In addition, when the slider 323 moves from one end of the spiral groove 326 to the other end and performs a reciprocating cycle, the fan blades 31 can realize forward air discharge and back air discharge, and the amount of air blown during the forward air discharge and back air discharge can allow the air to take away enough heat when circulating in the circulation groove 11, so as to avoid mutual interference between the forward air discharge and the back air discharge.

[0034] It should be noted that, by using the above-mentioned method, the rotating fan blades 31 can alternately discharge air in two back-to-back directions to achieve two-way air discharge, which can significantly improve air flowability. The two-way air discharge can make the air more evenly distributed in the circulation slot 11, avoiding local air stagnation that occurs during one-way air discharge. The reverse air discharge through the rotation of the fan blades 31 can effectively drive the outside air into the circulation slot 11, enhance the air circulation and ventilation efficiency, and effectively improve the heat dissipation rate, thereby achieving a better cooling effect. In addition, the two-way air discharge helps to break the stability of the original airflow, avoid the formation of dead corners, and ensure the continuous renewal of the air in the circulation slot 11. Through continuous air exchange and circulation, the airflow in the circulation slot 11 can be optimized, thereby improving the air circulation effect. Therefore, the above-mentioned method can significantly enhance the efficiency of air flow and ensure that the air will not be blocked due to flow in a single direction.

[0035] It should also be noted that during the reciprocating movement of the rotating sleeve 322, the rotating fan blades 31 are allowed to alternately discharge air in two back-to-back directions, which can further improve the efficiency of air circulation. After the fan blades 31 perform reciprocating motion, the air can form a continuous circulation in the circulation slot 11, avoiding air stagnation and uneven distribution. The two-way air discharge of the fan blades 31 provides two airflow directions during the movement of the fan blades 31, further promoting air exchange and renewal. As the fan blades 31 continue to move back and forth, the outside air is guided into the circulation slot 11 to promote the internal air flow. The reciprocating action of the fan blades 31 increases the power of air circulation, and the reverse air discharge helps to break the unidirectionality of the airflow, thereby improving the permeability and ventilation efficiency of the air in a complex environment. By allowing the reciprocating fan blades 31 to alternately discharge air in two back-to-back directions to allow the air to circulate in the circulation slot 11, not only the stability of the air flow is increased, but also the air circulation effect can be effectively improved.

[0036] Further, the spiral groove 326 is centrally distributed on the support column 321, and there is a reserved space at both ends of the spiral groove 326 and the support column 321. The spiral groove 326 is of the same length as the guiding groove 21. The outer diameter of the connecting rod 325 is adapted to the width of the inner cavity of the guiding groove 21, and the outer diameter of the slider 323 is adapted to the width of the inner cavity of the spiral groove 326.

[0037] It should be noted that the central distribution of the spiral groove 326 can make the force on the rotating sleeve 322 uniform, making the slider 323 slide more stably in the spiral groove 326, so that the spiral sleeve rotates more stably. In addition, when the rotating sleeve 322 rotates and moves, under the action of the reserved space, it can prevent the slider 323 from jamming when moving to the extreme position, improve reliability, reduce mechanical shock and mechanical wear, extend the service life, and at the same time improve the smoothness of the reciprocating movement of the slider 323, thereby ensuring the smoothness of the rotating sleeve 322 during rotation; at the same time, with the adaptation of the connecting rod 325 to the guiding groove 21 and the adaptation of the slider 323 to the spiral groove 326, the movement accuracy and stability are improved, and the movement of the moving sleeve 324 and the rotating sleeve 322 is prevented from being affected by shaking.

[0038] In addition, a cover body 4 is fixed on the end of the motor body 1 corresponding to the main shaft 2. The air guiding assembly 3 is located in the cover body 4. The cover body 4 is a hollow cylinder with one side missing near the motor body 1. The internal space of the cover body 4 is communicated with the internal space of the flow-through groove 11. The cover body 4 includes a support member 41 and a support plate 42. The support plate 42 is fixed in the support member 41, and a plurality of round holes 43 are formed on the support plate 42. One end of the support column 321 away from the end of the motor body 1 corresponding to the main shaft 2 is connected to the support plate 42.

[0039] It should be noted that by arranging the fan blade 31 and the connecting unit 32 in the cover body 4, the fan blade 31 can be effectively protected to protect the rotating and moving fan blade 31, so as to avoid interference from the outside during the operation of the fan blade 31, enable the fan blade 31 to blow air stably, and enable the air to flow stably in the flow-through groove 11, thereby improving the stability of cooling the motor body 1. Moreover, the flow-through groove 11 provided on the motor body 1 is within the coverage range of the cover body 4. When the fan blade 31 blows air to make the air flow, the flow direction of the air can also be restricted, so that the air can stably enter the flow-through groove 11 to ensure the air flow effect and ensure the cooling of the motor body 1 by the fan blade 31.

[0040] In addition, fixing the support column 321 between the support member 41 and the end of the motor body 1 corresponding to the main shaft 2 can also improve the stability of the moving sleeve 324 and the rotating sleeve 322 when moving on the support column 321, and further ensure the stability of the air blown by the fan blade 31.

[0041] Further, the support plate 42, the fan blade 31, and the flow channel 11 are distributed in the y-axis direction. When the rotating sleeve 322 moves towards the flow channel 11, the fan blade 31 rotates to blow air towards the flow channel 11; when the rotating sleeve 322 moves towards the round hole 43, the fan blade 31 rotates to blow air towards the round hole 43.

[0042] Specifically, when the fan blade 31 rotates to blow air into the flow channel 11, external air enters the housing 4 through the round hole 43, and the rotating fan blade 31 pushes the air into the flow channel 11, enabling the air to flow within the flow channel 11. When the fan blade 31 rotates to blow air away from the flow channel 11, external air first enters the flow channel 11, and under the action of the fan blade 31, the air entering the flow channel 11 then enters the housing 4 and is finally discharged by the rotating fan blade 31 through the round hole 43.

[0043] In another specific embodiment, filter meshes are provided both in the round hole 43 and the flow channel 11.

[0044] It should be noted that by providing the filter meshes, dust attachment in the flow channel 11 can be avoided, which may affect the heat transfer effect, ensuring that the air can better carry away heat during circulation. Moreover, through the alternating bidirectional air blowing of the fan blade 31, the dust attached to the filter meshes can be cleaned through air circulation, thereby improving the air circulation effect.

[0045] Embodiment 3: The basic content is the same as that of Embodiment 1, except that: Please refer to Figures 3-4 , at the position of the motor body 1 corresponding to the end of the main shaft 2 and close to the flow channel 11, a guiding surface 12 inclined towards the flow channel 11 is formed.

[0046] It can be known that by providing the guiding surface 12, the air can be guided when it enters the flow channel 11, enabling more air to enter the flow channel 11, increasing the air flow rate in the flow channel 11, thereby enhancing the heat dissipation rate of the motor body 1 and significantly improving the cooling effect.

[0047] The inner wall of the flow channel 11 is inclined inwards, and the inclination angle is 5 - 15°; preferably, the inclination angle of the inner wall of the flow channel 11 is 10°.

[0048] It should be noted that by inclining the inner wall of the flow channel 11, the eddy current and turbulence of the air during circulation in the flow channel 11 can be reduced to improve the flow efficiency. At the same time, the inclined inner wall can also reduce the shear force between the air flow and the channel wall, reduce the influence of the boundary layer, decrease the flow resistance, optimize the air flow effect, and further enhance the heat dissipation rate of the motor body 1 and strengthen the cooling effect.

[0049] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A brushless motor with a neodymium iron boron permanent magnet, characterized in that, It includes a number of air guiding components (3) arranged at the end of the motor body (1) corresponding to the main shaft (2). A number of flow-through grooves (11) are provided on the outer side of the motor body (1) along the y-axis direction. The air outlet direction of the air guiding component (3) is arranged along the y-axis direction and corresponds to the flow-through grooves (11). The projection of the flow-through grooves (11) in the y-axis direction is located on the air guiding component (3). The main shaft (2) is connected to the air guiding component (3), and the main shaft (2) is used to drive the air guiding component (3) to operate so that air circulates in the flow-through grooves (11). The air guiding component (3) includes a fan blade (31) and a connecting unit (32). The main shaft (2), the connecting unit (32), and the fan blade (31) are connected in sequence. The fan blade (31) reciprocally moves along the y-axis direction corresponding to the flow-through grooves (11) driven by the connecting unit (32) and rotates to discharge air.

2. The brushless motor with a neodymium iron boron permanent magnet according to claim 1, characterized in that, The connecting unit (32) includes a support column (321), a connecting rod (325), and a sleeve. The connecting rod (325) is vertically fixed on the outer periphery of the sleeve. A guiding groove (21) is provided at a position on the outer periphery of the main shaft (2) near the end of the motor body (1). The end of the connecting rod (325) away from the sleeve is slidably connected in the guiding groove (21). The support column (321) is fixed on the end of the motor body (1) corresponding to the main shaft (2) along the y-axis direction. The sleeve is sleeved on the support column (321). The connecting rod (325) slides in the guiding groove (21) to make the sleeve reciprocally move on the support column (321). The fan blade (31) is arranged on the sleeve. The fan blade (31) reciprocally moves and rotates with the sleeve, so that the air in the flow-through grooves (11) circulates. And when the rotating sleeve (322) moves towards the flow-through grooves (11), the fan blade (31) rotates to discharge air into the flow-through grooves (11).

3. The NdFeB permanent magnet brushless motor according to claim 2, characterized in that, The sleeve includes a rotating sleeve (322), a moving sleeve (324), and a slider (323). The rotating sleeve (322) is rotatably connected in the moving sleeve (324), and the rotating sleeve (322) is sleeved on the support column (321). The connecting rod (325) is vertically fixed on the outer periphery of the moving sleeve (324). The connecting rod (325) slides in the guiding groove (21) to make the rotating sleeve (322) reciprocally move on the support column (321) through the moving sleeve (324). The slider (323) is vertically fixed on the inner wall of the rotating sleeve (322). A spiral groove (326) is provided on the outer periphery of the support column (321). The end of the slider (323) away from the rotating sleeve (322) is slidably connected in the spiral groove (326). The rotating sleeve (322) rotates during the reciprocating movement through the slider (323) after the reciprocating movement. The fan blade (31) is fixed on the rotating sleeve (322).

4. The neodymium iron boron permanent magnet brushless motor according to claim 3, characterized in that, The spiral groove (326) is centrally distributed on the support column (321), and there is a reserved space at both ends of the spiral groove (326) and the support column (321). The spiral groove (326) is of the same length as the guide groove (21). The outer diameter of the connecting rod (325) is adapted to the width of the inner cavity of the guide groove (21), and the outer diameter of the slider (323) is adapted to the width of the inner cavity of the spiral groove (326).

5. The brushless motor with a neodymium iron boron permanent magnet according to claim 2, characterized in that, A cover body (4) is fixed on the end of the motor body (1) corresponding to the main shaft (2). The air guide assembly (3) is located inside the cover body (4). The cover body (4) is a hollow cylinder with one side missing near the motor body (1). The internal space of the cover body (4) is communicated with the internal space of the flow-through groove (11). The cover body (4) includes a support member (41) and a support plate (42). The support plate (42) is fixed inside the support member (41), and a plurality of round holes (43) are formed on the support plate (42). One end of the support column (321) far from the end of the motor body (1) corresponding to the main shaft (2) is connected to the support plate (42).

6. The NdFeB permanent magnet brushless motor according to claim 5, characterized in that, The support plate (42), the fan blade (31), and the flow-through groove (11) are distributed along the y-axis direction. When the rotating sleeve (322) moves towards the flow-through groove (11), the fan blade (31) rotates to blow air towards the flow-through groove (11). When the rotating sleeve (322) moves towards the round hole (43), the fan blade (31) rotates to blow air towards the round hole (43).

7. The brushless motor with a neodymium iron boron permanent magnet according to claim 1, characterized in that, A guiding surface (12) inclined towards the flow-through groove (11) is formed at the position of the motor body (1) corresponding to the end of the main shaft (2) and near the flow-through groove (11).

8. The brushless motor with a neodymium iron boron permanent magnet according to claim 1, wherein, The inner wall of the flow-through groove (11) inclines inwards, and the inclination angle is 5 - 15°.

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