Electric motor fan impeller and electric motor

Abstract

An electric motor fan impeller and an electric motor. The electric motor fan impeller comprises: a fan impeller disk, which is provided with a shaft hole in the middle; and a plurality of fan impeller blades, wherein the fan impeller blades are spirally arranged on the fan impeller disk in a first direction, the plurality of fan impeller blades are evenly distributed on the fan impeller disk, each fan impeller blade comprises a tail end close to the outer edge of the fan impeller disk and a front end close to the shaft hole, and in the spiral direction of the fan impeller blades, the thicknesses of the fan impeller blades gradually increase from the front end and the tail end to the middle. Under the same performance, the electric motor has a smaller size and lower noise, thereby achieving the purposes of high performance, miniaturization, a light weight and low noise of the electric motor.

Description

A motor fan blade and a motor Technical Field

[0001] This invention belongs to the field of motor technology, specifically relating to a motor fan blade and a motor. Background Technology

[0002] With the rapid development of small household appliance technology and the continuous improvement of people's living standards, vacuum cleaners have become one of the essential appliances in people's daily lives. Among them, handheld vacuum cleaners are favored by people because of their convenient cleaning, small space occupation and wide applicability. In order to increase the suction power, the motor speed of the vacuum cleaner will be very high, which will cause a lot of noise and cause harm to the operator. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a motor fan blade and a motor to solve the problems of difficulty in miniaturizing the motor of existing vacuum cleaners and high noise.

[0004] To achieve the above and other related objectives, the present invention provides a motor fan blade, comprising:

[0005] A fan blade disc, wherein a shaft hole is provided in the middle of the fan blade disc;

[0006] Multiple wind blades are spirally arranged on the wind blade disk along a first direction. The multiple wind blade disks are evenly distributed on the wind blade disk. Each wind blade includes a tail end near the outer edge of the wind blade disk and a front end near the shaft hole. In the spiral direction of the wind blade, the thickness of the wind blade gradually increases from the front end and the tail end towards the middle.

[0007] In one embodiment of the present invention, the wind blade has an arc-shaped structure, and the two sides of the wind blade along the first direction are the inner side and the outer side of the arc-shaped structure, and at the same position, the radius of curvature of the inner side is greater than that of the outer side.

[0008] In one embodiment of the present invention, the tangent of the outer edge of the fan blade at the tail end of the fan blade is arranged obliquely to the tail end of the fan blade.

[0009] In one embodiment of the present invention, along the second direction, the angle between the tangent and the tail end of the wind blade is between 98° and 105°, wherein the first direction is one of clockwise and counterclockwise, and the second direction is opposite to the first direction.

[0010] In one embodiment of the present invention, the front end of the wind blade forms an angle of 75° to 85° with the axis of the wind blade disk.

[0011] In one embodiment of the present invention, the angle between the tail end of the wind blade and the outer edge of the wind blade disk along the axial direction of the wind disk is between 140° and 160°.

[0012] In one embodiment of the present invention, the maximum outer diameter of the wind blade is greater than the outer diameter of the wind disk.

[0013] In one embodiment of the present invention, the maximum outer diameter of the tail end of the wind blade is 1.05 to 1.15 times the minimum outer diameter.

[0014] The present invention also proposes an electric motor, including a housing, a stator assembly and a rotor assembly disposed within the housing, and

[0015] The motor fan blade is connected to the rotating shaft of the rotor assembly. The motor fan blade includes a fan blade disk with a shaft hole in the middle.

[0016] Multiple wind blades are spirally arranged on the wind blade disk along a first direction. The multiple wind blade disks are evenly distributed on the wind blade disk. Each wind blade includes a tail end near the outer edge of the wind blade disk and a front end near the shaft hole. In the spiral direction of the wind blade, the thickness of the wind blade gradually increases from the front end and the tail end towards the middle.

[0017] In one embodiment of the present invention, the motor further includes:

[0018] A bearing housing is located at the end of the rotor assembly away from the housing, and a bearing mounting chamber is formed within the housing and / or the bearing housing, wherein an annular groove is provided on the side wall of the bearing mounting chamber;

[0019] An elastic element is installed in the annular groove and located between the bearing chamber and the bearing sleeved on the output shaft of the rotor assembly.

[0020] In one embodiment of the present invention, at least two annular grooves are provided on the side wall of the bearing mounting chamber.

[0021] In one embodiment of the present invention, the cross-section of the elastic element is circular, rectangular or elliptical.

[0022] In one embodiment of the present invention, the thickness of the elastic member is greater than the width of the annular groove along the axial direction of the elastic member.

[0023] In one embodiment of the present invention, the thickness of the elastic member is greater than the depth of the annular groove along the radial direction of the elastic member.

[0024] In one embodiment of the present invention, the inner diameter of the elastic element is smaller than the outer diameter of the bearing.

[0025] In one embodiment of the present invention, the cross-section of the annular groove is rectangular, trapezoidal or triangular.

[0026] In one embodiment of the present invention, a rubber pad is further provided between the end face of the bearing and the bottom surface of the bearing mounting chamber.

[0027] In one embodiment of the present invention, the surface of the elastic element has protrusions and / or ribs.

[0028] In one embodiment of the present invention, the stator core of the stator assembly includes:

[0029] Multiple continuous and equally divided yoke regions, with two adjacent yoke regions connected into a whole by a connecting region located on the outer circumference of the yoke region, and the connecting region having an arc structure;

[0030] The toothed region is provided on each yoke region, and a coil winding is wound on the toothed region. Multiple continuous and evenly divided yoke regions are bent along the connecting region to form a circular structure.

[0031] In one embodiment of the present invention, the arc contour lines of the connecting region near the inner side of the circular structure and the arc contour lines near the outer side of the circular structure are concentric arcs.

[0032] In one embodiment of the present invention, the arc contour line of the connecting region near the inner side of the circular structure is a superior arc, and the arc contour line near the outer side of the circular structure is a inferior arc.

[0033] In one embodiment of the present invention, the radius of the arc contour line of the connecting region near the inner side of the circular structure is smaller than the radius of the arc contour line near the outer side of the circular structure.

[0034] In one embodiment of the present invention, the two yoke regions located on both sides of a plurality of continuous and equally divided yoke regions are respectively a first yoke region and a second yoke region, wherein a first contour line of the first yoke region on the side away from the connecting region and a second contour line of the second yoke region on the side away from the connecting region are adapted to each other.

[0035] In one embodiment of the present invention, a groove is provided on the side of the first yoke region away from the connecting region, and a protrusion is provided on the side of the second yoke region away from the connecting region, the protrusion being adapted to the groove.

[0036] In one embodiment of the invention, an insulating frame is further included, the insulating frame surrounding the stator, and the coil winding is wound around the insulating frame.

[0037] In one embodiment of the present invention, a terminal for connecting the coil winding is further included, wherein the insulating frame, the terminal and the stator are integrally injection molded.

[0038] The present invention also proposes an electric tool, including a motor, the motor comprising a housing, a stator assembly and a rotor assembly disposed within the housing, and

[0039] The motor fan blade is connected to the rotating shaft of the rotor assembly. The motor fan blade includes a fan blade disk with a shaft hole in the middle.

[0040] Multiple wind blades are spirally arranged on the wind blade disk along a first direction. The multiple wind blade disks are evenly distributed on the wind blade disk. Each wind blade includes a tail end near the outer edge of the wind blade disk and a front end near the shaft hole. In the spiral direction of the wind blade, the thickness of the wind blade gradually increases from the front end and the tail end towards the middle.

[0041] The present invention also proposes a power tool, including a motor, said motor comprising:

[0042] The housing, the rotor assembly and stator assembly disposed within the housing, and the bearing bracket located at the end of the rotor assembly away from the housing;

[0043] A bearing mounting chamber is formed within the housing and / or the bearing bracket, and an annular groove is provided on the side wall of the bearing mounting chamber;

[0044] An elastic element, wherein the elastic element is installed within the annular groove;

[0045] The bearing is sleeved on the output shaft of the rotor assembly and located in the bearing mounting chamber, and the elastic element is located between the bearing chamber and the bearing.

[0046] The present invention also proposes an electric tool, including a motor, the motor comprising a rotor and a stator, the stator comprising:

[0047] The stator core includes multiple continuous and equally divided yoke regions, each yoke region having a tooth region.

[0048] Two adjacent yoke regions are connected into a whole by a connecting region, which is located on the outer circumference of the yoke region and has an arc structure.

[0049] A coil winding is wound on the toothed region, and multiple continuous and evenly divided yoke regions are bent along the connecting region to form a circular structure.

[0050] In one embodiment of the present invention, the power tool is one of a vacuum cleaner, a hair dryer, a pruning machine, and a chainsaw.

[0051] This invention proposes a motor fan blade and a motor, which have the following beneficial effects:

[0052] In this invention, the fan blade is designed as a turbine fan blade structure, with the fan blade having a structure that is thick in the middle and thin at both ends, which increases the strength of the blade and enables it to withstand higher speeds. By rationally designing the angle between the tail end of the fan blade and the fan blade disk, the angle at the air inlet of the fan blade, and the size of the fan blade, the cavity flow field is made smoother, improving efficiency. Under the same performance, the size is smaller and the noise is lower, achieving the goal of high performance, miniaturization, lightweight and low noise of the motor.

[0053] This invention creates grooves on the inner wall of the bearing housing and embeds elastic elements. The elastic elements are elastically contacted and fixed to the inner wall of the grooves. The rotor bearing is installed in the bearing housing, with the bottom of the bearing in contact with a rubber pad and the outer ring of the bearing elastically and tightly fitted to the elastic elements. The bearing is fixed by friction, so that the vibration generated by the motor during operation can be buffered by the elastic elements and rubber pads. This reduces the transmission of bearing vibration to the outside of the motor, effectively reducing motor noise. At the same time, since the bearing is not completely fixed during motor operation, it can be adjusted to the optimal position in the bearing housing, ensuring smooth motor operation.

[0054] This invention utilizes multiple continuous and evenly divided yoke regions of the stator, each with a toothed region. Adjacent yoke regions are connected into a single unit via a connecting region designed as an arc structure, located on the outer circumference of the yoke region. The stator has a straight-line structure. After the coil windings are wound in the toothed region of the straight-line stator, they are bent and welded along the connecting region to form a complete circular stator structure. This eliminates the wire tip size of the existing motor core structure, effectively reducing the core's size and weight, achieving motor miniaturization and weight reduction, and improving the motor's power density. At the same time, the arc structure of the connecting region makes it less prone to breakage and deformation during bending. Attached Figure Description

[0055] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0056] Figure 1 is a schematic diagram of the structure of a vacuum cleaner in one embodiment of the present invention.

[0057] Figure 2 is a schematic diagram of the unfolded structure of the stator in one embodiment of the present invention.

[0058] Figure 3 is a three-dimensional schematic diagram of the stator unfolded in one embodiment of the present invention.

[0059] Figure 4 is an enlarged view of point A in Figure 2.

[0060] Figure 5 is a schematic diagram of the stator and insulating frame in one embodiment of the present invention.

[0061] Figure 6 is a schematic diagram of stator winding in one embodiment of the present invention.

[0062] Figure 7 is a schematic diagram of the stator after bending in one embodiment of the present invention.

[0063] Figure 8 is a schematic diagram of the motor structure in one embodiment of the present invention.

[0064] Figure 9 is a cross-sectional structural diagram of the motor in one embodiment of the present invention.

[0065] Figure 10 is a schematic diagram of the structure of the motor housing in one embodiment of the present invention.

[0066] Figure 11 is a cross-sectional schematic diagram of the motor housing in one embodiment of the present invention.

[0067] Figure 12 is a schematic diagram of the shaft side structure of the motor fan in one embodiment of the present invention.

[0068] Figure 13 is a front view schematic diagram of the motor fan in one embodiment of the present invention.

[0069] Figure 14 is a schematic diagram of the included angle α between the motor and the fan in one embodiment of the present invention.

[0070] Figure 15 is a schematic diagram of the included angle β of the motor fan in one embodiment of the present invention.

[0071] Figure 16 is a schematic diagram of the motor fan in one embodiment of the present invention at another angle.

[0072] Figure 17 is a schematic diagram of the included angle γ of the motor fan in one embodiment of the present invention.

[0073] Figure 18 is a schematic diagram of the structure of the motor in one embodiment of the present invention.

[0074] Figure 19 is a cross-sectional schematic diagram of the motor in one embodiment of the present invention.

[0075] Labeling Explanation: 100, Motor; 10, Motor Fan Blade; 11, Fan Disc; 12, Fan Blade; 111, Shaft Hole; 121, Tail End; 122, Front End; 123, Inner Side; 124, Outer Side; 112, Large End; 113, Small End; 1221, First Side; 1222, Second Side; 1211, Third Side; 1212, Fourth Side; 20, Housing; 30, Bearing Bracket; 311, Output Shaft; 201, Bearing Mounting Chamber; 202, Annular Groove; 203, Rubber Ring; 204, Rubber Pad; 40, Stator Core ; 41. Yoke region; 42. Tooth region; 43. Connecting region; 44. Coil winding; 431. First arc contour line; 432. Second arc contour line; 411. First yoke region; 412. Second yoke region; 401. First contour line; 402. Second contour line; 403. Groove; 404. Protrusion; 45. Insulating frame; 46. Terminal; 200. Vacuum cleaner; 210. Housing; 220. Dust collection unit; 230. Suction generating unit; 240. Air duct unit; 250. Floor brush. Detailed Implementation

[0076] Please refer to Figures 1 to 19. This invention also proposes a power tool, which includes a motor 100 as described in the above embodiments. The power tool is one of a vacuum cleaner, a hair dryer, a pruning machine, and a chainsaw. For example, a vacuum cleaner 200 is described as follows: the vacuum cleaner 200 includes a housing 210, a dust collection unit 220 mounted on the housing 210, a suction generating unit 230, an air duct unit 240, and a floor brush 250. The housing 210 includes a body, a handle, and a base. The handle is located between the body and the base. The air duct unit 240 is used to cooperate with the air inlet and the floor brush 250. The suction generating unit 230 is connected to the side of the body away from the handle. The suction generating unit 230 includes a housing and a motor 100 disposed within the housing. The motor 100 includes a stator 40, a bearing mounting structure, and a motor fan blade 10 as described in the following embodiments.

[0077] Please refer to Figures 2 to 7. Existing motor cores are all complete circular structures. This structure requires consideration of the wire tip size during winding, necessitating space for the wire tip, thus limiting the size and making miniaturization and weight reduction difficult. Therefore, this invention proposes a stator, motor, and power tool that achieves motor miniaturization and weight reduction by modifying the stator core. Specifically, the motor includes a rotor and a stator. The rotor can rotate around a rotation axis. The stator includes a stator core 40, which includes multiple continuous and evenly divided yoke regions 41. Each yoke region 41 has a toothed region 42. Adjacent yoke regions 41 are connected as a whole by a connecting region 43. A coil winding 44 is wound on the toothed region 42. The stator core 40 includes a pre-forming state, in which the multiple yoke regions 41 are arranged in a straight line, and adjacent yoke regions 41 are connected by the connecting region 43, so that the multiple yoke regions 41... To facilitate the winding of the coil winding 43, the coil winding 44 is wound on the tooth region 42 in this state. After multiple continuous and evenly divided yoke regions 41 are bent along the connecting region 43, they form a circular structure. The two yoke regions 41 located on both sides in the straight arrangement are welded and fixed to form the formed state, which is the formed stator. In the formed state, the coil winding 44 is wound on the tooth region 42 without considering the wire nozzle size and without reserving the wire nozzle position. This can effectively reduce the outer size and weight of the iron core, realize the miniaturization and weight reduction of the motor, and improve the power density of the motor.

[0078] Referring to Figures 2 to 4, in this embodiment, the connecting region 43 is located on the outer circumference of the yoke region 41, and the connecting region 43 has an arc structure to facilitate bending and shaping of multiple yoke regions 41, and to prevent breakage and deformation during bending. In this embodiment, the first arc contour line 431 near the inner side of the circular structure and the second arc contour line 432 near the outer side of the circular structure of the connecting region 41 are concentric arcs. Further, the first arc contour line 431 near the inner side of the circular structure of the connecting region 43 is a dominant arc, for example, the first contour line is greater than or equal to three-quarters of an arc, and the second arc contour line 432 near the outer side of the circular structure is a minor arc, for example, the second contour line is less than or equal to one-quarter of an arc. Furthermore, the radius of the first arc contour line 431 near the inner side of the circular structure of the connecting region 43 is smaller than the radius of the second arc contour line 432 near the outer side of the circular structure, so that the yoke region 41 can be bent into a circular structure.

[0079] Please refer to Figures 2 and 3. In this embodiment, the first yoke region 411 and the second yoke region 412 are located on both sides of a plurality of continuous and evenly divided yoke regions 41. The first contour line 401 of the first yoke region 411 away from the connecting region 43 and the second contour line 402 of the second yoke region 412 away from the connecting region are adapted to each other so that when the plurality of yoke regions 41 are bent into a circle, the first contour line 401 and the second contour line 402 can better fit together for welding, which facilitates fixing and welding. In this embodiment, a groove 403 is provided on the side of the first yoke region 411 away from the connecting region 43, and a protrusion 404 is provided on the side of the second yoke region 412 away from the connecting region 43. The protrusion 404 is adapted to the groove 403. When the plurality of yoke regions 41 are bent into a circle, the protrusion 403 engages in the groove 403 and is welded and fixed to form the shape.

[0080] Please refer to Figures 2, 5 to 7. In this embodiment, the stator further includes an insulating frame 45 and a terminal 46 connecting the coil winding. The insulating frame 45 surrounds the stator, and the coil winding 44 is wound around the insulating frame 45. The insulating frame 45, the terminal 46 and the stator are integrally injection molded.

[0081] Please refer to Figures 2 to 7. In this embodiment, the stator forming process is as follows: multiple stator core laminations with yoke regions 41 arranged in a straight line can be formed by stamping or other methods. The stator core is formed by stacking multiple stator core laminations. The stator core is then injection molded as an insert. The insulating frame 45, the terminals 46, and the stator are integrally formed by injection molding. Then, a coil winding 44 is wound on the outside of the insulating frame 45 located in the tooth region 42. After winding, the multiple yoke regions 41 are bent along the connecting region 43 to form a circular structure. Finally, two yoke regions 41 located on both sides of the multiple yoke regions 41 are laser welded to form the formed stator core.

[0082] The above embodiment divides the stator into multiple continuous and evenly divided yoke regions, each with a toothed region. Adjacent yoke regions are connected into a whole by a connecting region designed as an arc structure, located on the outer circumference of the yoke region. The stator has a straight-line structure. After the coil winding is wound in the toothed region of the straight-line stator, it is bent and welded along the connecting region to form a complete circular stator structure. This eliminates the wire nozzle size of the existing motor core structure, effectively reducing the outer size and weight of the core, achieving motor miniaturization and weight reduction, and improving the power density of the motor. At the same time, the arc structure of the connecting region makes it less prone to breakage and deformation during bending.

[0083] Referring to Figures 8 to 11, it can also be understood that bearings in existing motors are basically glued to the bearing housing. This method completely fixes the bearing in place. If the bearing's concentricity is poor, it can easily increase operating noise. Simultaneously, the heat generated during operation can easily cause the glue to fail, leading to bearing detachment and loss of fixation, ultimately causing motor failure. Furthermore, this fixing method allows motor vibrations to be transmitted to the outside of the motor through the bearing housing, resulting in excessive motor noise. Therefore, this invention proposes a new method for fixing motor bearings, avoiding motor failure due to bearing fixation failure, while effectively reducing motor noise. Specifically, the motor 100 includes a housing 20, a rotor assembly and a stator assembly disposed within the housing 20, and a bearing bracket 30 located at the end of the rotor assembly away from the housing 20. Bearings are installed within the housing 20 and the bearing bracket 30, and the bearings are sleeved on the output shaft 311 of the rotor assembly.

[0084] Please refer to Figures 8 to 11. In this embodiment, a bearing mounting chamber 201 is formed within both the housing 20 and / or the bearing bracket 30. An annular groove 202 is formed on the side wall of this bearing chamber, and an elastic element 203 is embedded within the annular groove 202. A bearing is installed within the bearing chamber, and a rubber pad 204 is also arranged on the bottom surface of the bearing and the mounting chamber. The bearing is fixed by the compression action between itself and the elastic element 203. Furthermore, the elastic element 203 and the rubber pad 204 also provide a buffering effect, effectively reducing motor noise. In this embodiment, the elastic element 203 is a rubber ring or other elastic structure. It is understood that the installation and fixing methods of the bearing mounting chamber, the elastic element, and the second bearing in the bearing bracket are the same or similar. The following embodiment uses the bearing installation within the housing 20 as an example for explanation.

[0085] Please refer to Figures 8, 9, and 10. In this embodiment, a bearing mounting chamber 201 is formed within the housing 20. An annular groove 202 is provided on the side wall of the bearing mounting chamber 201. An elastic element 203 is fixedly installed within the annular groove 202. A first bearing 301 is sleeved on the output shaft 311 of the rotor assembly and located within the bearing mounting chamber 201. The outer side wall of the first bearing 301 is pressed and fixed with the elastic element 203. That is, the first bearing 301 is elastically pressed with the elastic element 203, thereby making the outer ring of the bearing tightly fit with the elastic element 203. The bearing is fixed by friction, so that the vibration generated by the motor during operation can be buffered by the elastic element 203, which can reduce the transmission of bearing vibration to the outside of the motor and effectively reduce motor noise. At the same time, since the bearing is not completely fixed during motor operation, it can be adjusted to the optimal position in the bearing chamber, ensuring smooth motor operation.

[0086] Please refer to Figures 9, 10 and 11. In this embodiment, at least two annular grooves 202 are provided on the side wall of the bearing mounting chamber 201. Each annular groove 202 is embedded with an elastic element 203 to increase the friction between the first bearing 301 and the elastic element 203 during installation, ensuring reliable installation. At the same time, the presence of multiple elastic elements 203 can further reduce the transmission of bearing vibration and effectively reduce motor noise.

[0087] Please refer to Figures 9, 10, and 11. In this embodiment, along the axial direction of the elastic member 203, the thickness of the elastic member 203 is greater than the width of the annular groove 202. This ensures that after the elastic member 203 is embedded in the annular groove 202, the elastic member 203, through its elastic deformation, compresses the sidewall of the annular groove 202, ensuring that the elastic member 203 can be securely installed within the annular groove 202, preventing it from falling out. In this embodiment, along the radial direction of the elastic member 203, the thickness of one side of the elastic member 203 is greater than the depth of the annular groove 202. This ensures that after the elastic member 203 is embedded in the annular groove 202, it at least partially protrudes from the annular groove 202, making contact with the first bearing 301 in the bearing mounting chamber 201. This ensures that the elastic member 203 can fix the first bearing 301 and provide vibration damping. In this embodiment, the inner diameter of the elastic element 203 is smaller than the outer diameter of the first bearing 301 to ensure that the bearing can exert a squeezing effect on the elastic element 203 after installation, thus ensuring the reliability of its installation and the effectiveness of vibration reduction. In this embodiment, the cross-sectional shape of the elastic element 203 can be any one or more of a circle, rectangle, and ellipse, and the cross-sectional shape of the annular groove 202 can be any one or more of a rectangle, trapezoid, and triangle. Of course, the cross-sectional shapes of the elastic element 203 and the annular groove 202 can also be set to other shapes.

[0088] Please refer to Figures 9, 10 and 11. In this embodiment, the surface of the elastic member 203 may also be provided with one or more of the following: protrusions, ribs, or other surface protrusion structures, in order to increase the friction between the elastic member 203 and the first bearing 301, ensure the reliability of its installation, increase the buffering capacity of the elastic member 203, and further reduce motor noise.

[0089] Please refer to Figures 9, 10 and 11. In this embodiment, a rubber pad 204 is also provided between the end face of the first bearing 301 and the bottom surface of the bearing mounting chamber 201. The rubber pad 204 can play a buffering role, further reducing the transmission of bearing vibration to the outside of the motor, thereby reducing motor noise.

[0090] The above embodiment involves creating grooves on the inner wall of the bearing housing and embedding elastic elements. The elastic elements are elastically contacted and fixed to the inner wall of the grooves. The rotor bearing is installed in the bearing housing, with the bottom of the bearing in contact with the rubber pad and the outer ring of the bearing elastically and tightly fitted to the elastic elements. The bearing is fixed by friction, so that the vibration generated by the motor during operation can be buffered by the elastic elements and rubber pads. This reduces the transmission of bearing vibration to the outside of the motor, effectively reducing motor noise. At the same time, since the bearing is not completely fixed during motor operation, it can be adjusted to the optimal position in the bearing housing, ensuring smooth motor operation.

[0091] Please refer to Figures 12 to 19. It can also be understood that the impeller is an important component of the motor. The motor drives the impeller to rotate at high speed, generating airflow. Most existing motors use centrifugal impellers. These impellers, while offering the same performance, suffer from drawbacks such as larger size, inability to withstand high speeds, low machining precision, and susceptibility to vibration and noise. Therefore, this invention provides a motor impeller to solve the problems of existing motors using centrifugal impellers, which result in larger size, inability to withstand high speeds, low machining precision, and susceptibility to vibration and noise while offering the same performance. In the following embodiments, the first direction described is either clockwise or counterclockwise, and the second direction is the opposite of the first direction. In the following embodiments, an example is given where the first direction is counterclockwise and the second direction is clockwise.

[0092] Please refer to Figures 12 to 17. The motor fan blade 10 includes a fan disc 11 and fan blades 12. The fan disc 11 is generally conical in shape, with a shaft hole 111 in the middle. The shaft hole 111 is used to connect with the motor shaft of the motor. A plurality of fan blades 12 are evenly distributed on the fan disc 11. The plurality of fan blades 12 are arranged around the shaft hole 111, and the fan blades 12 extend from the outer edge of the fan disc 11 toward the shaft hole 11 in a first direction and are arranged in a spiral.

[0093] Please refer to Figures 12 and 17. In this embodiment, the thickness of the wind blade 12 gradually increases from both ends towards the middle. Specifically, the wind blade 12 includes a tail end 121 and a front end 122. The tail end 121 is the end of the wind blade 121 near the outer edge of the wind disk 11, and the front end 122 is the end of the wind disk 11 near the shaft hole 111. In the helical direction of the wind blade 12, the thickness of the wind blade 12 gradually increases from the front end 122 and the tail end 121 towards the middle, which increases the blade strength to a certain extent, enabling it to withstand higher rotational speeds.

[0094] Please refer to Figures 12, 13, and 14. In this embodiment, the fan blade 12 has an arc-shaped structure. The two sides of the fan blade 12 along the first direction are the inner side 123 and the outer side 124 of the arc-shaped structure, respectively. Two adjacent fan blades 12 form an airflow channel. At the same position, the radius of curvature of the inner side 123 is greater than that of the outer side 124. For example, at the thickest part of the fan blade 12, the radius of curvature of the inner side 123 is greater than that of the outer side 124. Its cross-section is crescent-shaped. The curvature of the two sides of the fan blade 122 is not equal, that is, it adopts a non-parallel design, which allows the airflow to flow smoothly in the blade. Its flow rate is uniform, which can reduce noise and improve the efficiency of the fan blade. Under the same performance, the motor fan blade is smaller and the noise is lower, realizing the purpose of high performance, miniaturization, lightweight and low noise of the motor.

[0095] Please refer to Figures 12, 13, and 14. In this embodiment, the fan blade 12 and the fan disk 11 are arranged at an angle. Specifically, the tangent of the outer edge of the fan disk 11 at the tail end 121 of the fan blade 12 is arranged at an angle to the tail end 121 of the fan blade 12. For example, along the second direction, the tangent and the tail end 121 of the fan blade 12 are not perpendicular, that is, the tangent and the tail end 121 of the fan blade 12 form an angle α. The angle α is set between 98° and 105° to reduce the noise when the fan blade rotates.

[0096] Please refer to Figures 12, 13, 15, and 16. In this embodiment, the air inlet of the fan blade 12 is inclined to the axis of the fan disk 11, that is, the front end 122 of the fan blade 12 is inclined to the axis of the fan disk 11. Specifically, the conical fan disk 11 includes a large end 112 and a small end 113. The front end 122 of the fan blade 12 includes a first side 1221 and a second side 1222. The first side 1221 is adjacent to the fan disk 11. On the connected side, the second side 1222 is the side away from the fan blade disk 11. In the direction X from the small end 113 to the large end 112, the second side 1222 to the first side 1221 of the front end 122 are arranged obliquely so as to be inclined with the axis of the fan blade disk 11. The small included angle β formed between the front end 12 and the axis of the fan blade disk 11 is set between 75° and 85° to further reduce the noise when the fan blades rotate and improve the comfort of use.

[0097] Please refer to Figures 12, 13, 15, and 17. In this embodiment, along the axial direction of the fan blade disk 11, an angle γ is formed between the tail end 121 of the fan blade 12 and the outer edge of the fan blade disk 11. Specifically, the tail end 121 of the fan blade 12 includes a third side 1211 and a fourth side 1212. The third side 1211 is the side connected to the fan blade disk 11, and the fourth side 1212 is the side away from the fan blade disk 11. In the radial direction of the fan blade disk 11, the third side 1211 to the fourth side 1212 extend from the outer edge of the fan blade disk 11 away from the outer edge, so that an angle γ is formed between the tail end 121 and the outer edge of the fan blade disk 11. This angle γ is set between 140° and 160°. In this embodiment, the maximum outer diameter of the fan blade 12 is greater than the outer diameter of the fan disk 11. That is, the tail end 121 of the fan blade 12 protrudes outward relative to the outer edge of the fan disk 11, and the maximum outer diameter D1 of the tail end 121 of the fan blade 12 is 1.05 to 1.15 times its minimum outer diameter D2. The maximum outer diameter is located on the side of the tail end 121 of the fan blade 12 away from the fan disk 11, i.e., the fourth side 1212. The minimum outer diameter is located on the side of the tail end 121 of the fan blade 12 connected to the fan disk 11, i.e., the third side 1211, in order to further reduce the noise when the fan blade rotates.

[0098] Please refer to Figures 12 to 19. A fan shroud 21 is provided at one end of the housing 20. A stator assembly and a rotor assembly are provided inside the housing 20. A rotating shaft is provided in the middle of the rotor assembly. A motor fan 10 is provided inside the fan shroud 21. The shaft hole of the motor fan blade 10 is fixedly connected to the rotating shaft. The large end of the fan blade disk 11 in the motor fan blade 10 is close to the rotor assembly. The structure of the motor fan blade 10 is the same as or similar to that of the motor fan blade 10 described in the above embodiments. To avoid repetition, it will not be described again here.

[0099] This invention proposes a motor fan blade designed as a turbine fan blade structure. The fan blade has a structure that is thick in the middle and thin at both ends, which increases the strength of the blade and enables it to withstand higher speeds. By rationally designing the angle between the tail end of the fan blade and the fan blade disk, the angle at the air inlet of the fan blade, and the size of the fan blade, the cavity flow field is made smoother, improving efficiency. Under the same performance, it is smaller in size and lower in noise, achieving the goals of high performance, miniaturization, lightweight and low noise of the motor.

[0100] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A motor fan blade, characterized in that, include: A fan blade disc, wherein a shaft hole is provided in the middle of the fan blade disc; Multiple wind blades are spirally arranged on the wind blade disk along a first direction. The multiple wind blade disks are evenly distributed on the wind blade disk. Each wind blade includes a tail end near the outer edge of the wind blade disk and a front end near the shaft hole. In the spiral direction of the wind blade, the thickness of the wind blade gradually increases from the front end and the tail end towards the middle.

2. The motor fan blade according to claim 1, characterized in that, The wind blade has an arc-shaped structure, and the two sides of the wind blade along the first direction are the inner side and the outer side of the arc-shaped structure, and at the same position, the radius of curvature of the inner side is greater than that of the outer side.

3. The motor fan blade according to claim 1, characterized in that, The tangent of the outer edge of the wind turbine disc at the tail end of the wind blade is inclined to the tail end of the wind blade.

4. The motor fan blade according to claim 3, characterized in that, Along the second direction, the angle between the tangent and the tail end of the wind blade is between 98° and 105°, wherein the first direction is one of clockwise and counterclockwise, and the second direction is opposite to the first direction.

5. The motor fan blade according to claim 1, characterized in that, The front end of the wind blade forms an angle of 75° to 85° with the axis of the wind disk.

6. The motor fan blade according to claim 1, characterized in that, Along the axial direction of the wind turbine disk, the angle between the tail end of the wind blade and the outer edge of the wind turbine disk is between 140° and 160°.

7. The motor fan blade according to claim 6, characterized in that, The maximum outer diameter of the wind blade is greater than the outer diameter of the wind disk.

8. The motor fan blade according to claim 7, characterized in that, The maximum outer diameter of the tail end of the wind turbine blade is 1.05 to 1.15 times the minimum outer diameter.

9. An electric motor, characterized in that, Includes a housing, a stator assembly and a rotor assembly disposed within the housing, and The motor fan blade is connected to the rotating shaft of the rotor assembly. The motor fan blade includes a fan blade disk with a shaft hole in the middle. Multiple wind blades are spirally arranged on the wind blade disk along a first direction. The multiple wind blade disks are evenly distributed on the wind blade disk. Each wind blade includes a tail end near the outer edge of the wind blade disk and a front end near the shaft hole. In the spiral direction of the wind blade, the thickness of the wind blade gradually increases from the front end and the tail end towards the middle.

10. The motor according to claim 9, characterized in that, Also includes: A bearing housing is located at the end of the rotor assembly away from the housing, and a bearing mounting chamber is formed within the housing and / or the bearing housing, wherein an annular groove is provided on the side wall of the bearing mounting chamber; An elastic element is installed in the annular groove and located between the bearing chamber and the bearing sleeved on the output shaft of the rotor assembly.

11. The motor according to claim 10, characterized in that, Along the axial direction of the elastic element, the thickness of the elastic element is greater than the width of the annular groove; along the radial direction of the elastic element, the thickness of one side of the elastic element is greater than the depth of the annular groove, and the inner diameter of the elastic element is smaller than the outer diameter of the bearing.

12. The motor according to claim 10, characterized in that, A rubber pad is also provided between the end face of the bearing and the bottom surface of the bearing mounting chamber.

13. The motor according to claim 9, characterized in that, The stator core of the stator assembly includes: Multiple continuous and equally divided yoke regions, with two adjacent yoke regions connected into a whole by a connecting region located on the outer circumference of the yoke region, and the connecting region having an arc structure; The toothed region is provided on each yoke region, and a coil winding is wound on the toothed region. Multiple continuous and evenly divided yoke regions are bent along the connecting region to form a circular structure.

14. The motor according to claim 13, characterized in that, The arc contour lines of the connecting area near the inner side of the circular structure and near the outer side of the circular structure are concentric arcs.

15. The motor according to claim 13, characterized in that, The two yoke regions located on either side of a plurality of continuous and equally divided yoke regions are a first yoke region and a second yoke region, respectively. The first contour line of the first yoke region on the side away from the connecting region and the second contour line of the second yoke region on the side away from the connecting region are adapted to each other.

Images