Permanent magnet outer rotor motor and fan

Abstract

The permanent magnet outer rotor motor comprises a stator assembly and a rotor assembly, the stator assembly comprises a stator, the stator is fixedly provided with a shaft body, the shaft body is inserted into the stator, the outer wall of the stator is provided with a stator iron core, the stator iron core is wound with a coil, the rotor assembly comprises a rotating sleeve, and the rotating sleeve can rotate around the axis of the rotating sleeve. A first end cover is installed at the upper end of the rotating sleeve, a second end cover is installed at the lower end of the rotating sleeve, the lower end of the shaft body penetrates through the second end cover, the lower end of the shaft body is fixedly connected with a base disc, the base disc is located below the second end cover, and the shaft body is inserted into the base disc and fixed. The permanent magnet outer rotor motor and the fan provided by the utility model are small in size, light in weight, simple in overall structure and convenient to install and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a permanent magnet outer rotor motor and a fan. Background Art

[0002] At present, the inner rotor asynchronous motors on the market are relatively large in size and weight. A cooling fan with a larger diameter requires a relatively low speed of the motor it drives. When using an inner rotor asynchronous motor, a reduction mechanism needs to be added to the rotor to reduce the speed of the fan blades. Therefore, the overall size and weight are relatively large, the installation is complicated, the maintenance is inconvenient, and the installation space is also limited. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a permanent magnet outer rotor motor and a fan with small size, light weight, simple overall structure and convenient installation and maintenance.

[0004] The utility model discloses a permanent magnet outer rotor motor, comprising a stator assembly and a rotor assembly. The stator assembly comprises a stator, a shaft body is fixedly mounted on the stator, the shaft body is inserted into the stator, a stator core is mounted on the outer wall of the stator, a coil is wound around the stator core, the rotor assembly comprises a rotating sleeve, the rotating sleeve can rotate around its own axis, the stator core is located on the radial inner side of the rotating sleeve, a plurality of magnetic steels are mounted on the inner wall of the rotating sleeve, an air gap is formed between the magnetic steels and the stator core, a first end cover is mounted on the upper end of the rotating sleeve, a second end cover is mounted on the lower end of the rotating sleeve, the lower end of the shaft body passes through the second end cover, the lower end of the shaft body is fixedly connected to a base plate, the base plate is located below the second end cover, and the shaft body is inserted into the base plate and fixed.

[0005] Furthermore, the base plate includes a sleeve body, the inner wall surface of the sleeve body is a conical surface, the shaft body is provided with a conical portion, the conical portion is inserted into the sleeve body, the outer wall surface of the conical portion abuts against the inner wall surface of the sleeve body, and the minimum outer diameter of the conical portion is greater than the minimum inner diameter of the inner wall surface of the sleeve body.

[0006] Furthermore, the sleeve body includes a sleeve body wall surface located at the bottom, the sleeve body wall surface is located below the cone portion, and the cone portion and the sleeve body wall surface are connected via a fastening component.

[0007] The utility model also discloses a fan, including a permanent magnet outer rotor motor, a first end cover radially outer end is provided with a plurality of first slot bodies, a cover plate is connected above the first end cover, the cover plate is provided with second slot bodies corresponding to the first slot bodies one by one, the first slot bodies and the corresponding second slot bodies are arranged opposite to each other up and down, a fan blade assembly is installed between the first end cover and the cover plate, the fan blade assembly includes a shaft rod, the shaft rod is fixedly connected with fan blades, the shaft rod is inserted between the first slot body and the corresponding second slot body and is fixed.

[0008] Furthermore, the first groove body penetrates the first end cover in a radially outward direction of the first end cover, and the second groove body penetrates the cover plate in a radially outward direction of the cover plate.

[0009] Furthermore, the first groove body is an arc-shaped groove, and the axis of the first groove body is arranged radially along the first end cover; the second groove body is an arc-shaped groove, and the axis of the second groove body is arranged radially along the cover plate.

[0010] Furthermore, at least one first protrusion is provided on the inner wall of the first slot body, and the first protrusion is arc-shaped and the arc-shaped surface is perpendicular to the axis of the first slot body.

[0011] Furthermore, at least one second protrusion is provided on the inner wall of the second slot body, and the second protrusion is arc-shaped and the arc-shaped surface is perpendicular to the axis of the second slot body.

[0012] Furthermore, the first end cover is provided with mounting holes, and the mounting holes are located on both axial sides of the first slot body.

[0013] Furthermore, a groove is provided around the shaft rod, and both the first protrusion and the second protrusion can be inserted into the groove.

[0014] Beneficial effects of the utility model:

[0015] 1. The motor in the present invention is an outer rotor permanent magnet motor, which uses the characteristics of low speed and large torque of the outer rotor motor to drive a large diameter fan. There is no need to install a reduction mechanism. It has the advantages of small size, light weight, high efficiency, stepless speed regulation, simple overall structure, and easy installation and maintenance.

[0016] 2. Tighten the sleeve wall and the cone through the fastening components to prevent the shaft from loosening in the axial direction. At the same time, the inner wall of the sleeve forms a limit clamp on the outer periphery of the cone, making the installation structure of the entire cone more stable and improving the stability and safety of the entire fan during operation. And when the locating pin is inserted, the inner wall of the sleeve forms a limit on the outer periphery of the cone, making it easier for the locating pin to align with the locating hole of the cone to facilitate installation.

[0017] 3. Adjust the wind force by adjusting the inclination angle between the fan blade surface and the fan blade rotating surface to meet actual needs. When adjusting, loosen the shaft rod and rotate the shaft rod along the axis of the shaft rod to change the inclination angle between the fan blade surface and the fan blade rotating surface, thereby achieving wind force adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial stereogram of an embodiment;

[0019] Figure 2 This is a three-dimensional diagram of the installation of the fan blade assembly in the embodiment;

[0020] Figure 3 is a three-dimensional diagram of the first end cover and the cover plate in the embodiment;

[0021] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0022] Figure 5 It is a cross-sectional view of the installation of the shaft rod in the embodiment;

[0023] Figure 6 A partial cross-sectional view of an embodiment;

[0024] Figure 7 for Figure 6 P-direction view of the middle base plate;

[0025] Figure 8 is a partial cross-sectional view of the first end cover in the embodiment;

[0026] Fig. 9 for Figure 8 Q-direction view of the first end cap.

[0027] Figure markings: stator assembly 1, shaft body 11, cone 111, stator 12, stator core 121, rotor assembly 2, rotating sleeve 21, first end cover 211, first groove body 2111, first protrusion 2112, mounting hole 2113, second end cover 212, cover plate 22, second groove body 221, second protrusion 222, base plate 3, sleeve body 31, sleeve body wall 311, fastening component 4, locating pin 5, first bearing 6, second bearing 7, fan blade assembly 8, shaft rod 81, groove 811, fan blade 82, magnetic steel 9. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] like Figure 6 As shown, a permanent magnet outer rotor motor and fan include a stator assembly 1 and a rotor assembly 2. The rotor assembly 2 can rotate around its own axis. The rotor assembly 2 includes a rotating sleeve 21. The rotating sleeve 21 is a ring sleeve structure. The upper end of the rotating sleeve 21 is installed with a first end cover 211, and the lower end of the rotating sleeve 21 is installed with a second end cover 212. The first end cover 211 is installed with a shaft body 11. The upper end of the shaft body 11 is inserted into the first end cover 211 and connected to the first end cover 211 through a first bearing 6. The first bearing 6 is a double-row angular contact bearing that can withstand radial force and axial force. The lower end of the shaft body 11 passes through the second end cover 212 and extends downward from the second end cover 212. The shaft body 11 and the second end cover 212 are connected through a second bearing 7. The second bearing 7 is a deep groove ball bearing that mainly bears radial loads.

[0030] like Figure 6As shown, the stator assembly 1 includes a stator 12, a shaft 11 is inserted into the stator 12 and fixedly connected, a stator core 121 is installed on the outer wall of the stator 12, the stator core 121 is an annular structure, the stator core 121 is inserted into the stator 12 and fixedly connected, a plurality of punching slots are evenly distributed on the outer periphery of the stator core 121, the punching slots penetrate the stator core 121 axially along the stator core 121, and the stator core 121 is wound with coils, which are wound around the punching slots. The stator core 121 is located radially inside the rotating sleeve 21, and a plurality of magnetic steels 9 are installed on the inner wall of the rotating sleeve 21, the magnetic steels 9 are permanent magnets, and the magnetic steels 9 are evenly distributed along the inner wall of the rotating sleeve 21 in the circumferential direction, and an air gap is formed between the magnetic steels 9 and the stator core 121, and the magnetic field generated by the magnetic steels 9 interacts with the magnetic field generated by the coil of the stator core 121 after power is supplied, so that the rotor assembly 2 and the stator 12 generate relative rotation.

[0031] like Figure 6 As shown, the shaft body 11 is fixedly connected to the base plate 3, and the shaft body 11 is inserted into the base plate 3 and fixed.

[0032] Specifically, the base plate 3 is a fixing part, and the base plate 3 is fixed to other parts of the fan. The base plate 3 includes a sleeve 31 located radially inward. The sleeve 31 is a cylindrical structure, and the upper end of the sleeve 31 is open. The inner wall surface of the sleeve 31 is a conical surface, and the inner diameter of the upper end is greater than the inner diameter of the lower end. A cone 111 is provided at the bottom of the shaft body 11. The outer diameter of the upper end of the cone 111 is greater than the outer diameter of the lower end. The cone 111 is inserted into the sleeve 31, and the outer wall surface of the cone 111 can abut against the inner wall surface of the sleeve 31. The minimum outer diameter of the cone 111 is greater than the minimum inner diameter of the inner wall surface of the sleeve 31 to prevent the cone 111 from being directly inserted into the bottom of the inner wall of the sleeve 31, and no abutment is generated between the inner wall of the sleeve 31 and the cone 111.

[0033] like Figure 6 As shown, the casing 31 includes a casing wall 311 at the bottom, and the casing wall 311 is located below the cone 111. Figure 7 The cone 111 and the sleeve wall 311 are positioned by a positioning pin 5, which passes through the sleeve wall 311 and is inserted into the bottom surface of the cone 111. After the cone 111 and the sleeve wall 311 are positioned, they are connected by a fastening component 4, which is a screw. The sleeve wall 311 and the cone 111 are tightened to each other by the fastening component 4 to prevent the shaft 11 from loosening in the axial direction. At the same time, the inner wall of the sleeve 31 forms a limit clamping against the outer periphery of the cone 111, making the installation structure of the entire cone 111 more stable, and improving the stability and safety of the entire fan during operation. And when the positioning pin 5 is inserted, since the inner wall of the sleeve 31 forms a limit against the outer periphery of the cone 111, it is easier for the positioning pin 5 to align with the positioning hole of the cone 111 to facilitate installation.

[0034] like Figure 6 As shown, a cover plate 22 is connected above the first end cover 211, and Figure 1 , Figure 2 A fan blade assembly 8 is installed between the first end cover 211 and the cover plate 22. The fan blade assembly 8 includes a shaft rod 81, and the shaft rod 81 is fixedly connected with a fan blade 82. When the first end cover 211 rotates, the cover plate 22 and the fan blade assembly 8 are driven to rotate, so that the fan blade 82 rotates and generates wind force.

[0035] like Figure 3 , Figure 4 , Figure 8 As shown, four first slots 2111 are provided at the radial outer end of the first end cover 211, and the first slots 2111 are evenly distributed along the circumference of the first end cover 211. The first slots 2111 penetrate the first end cover 211 radially outwardly from the first end cover 211. The first slots 2111 are arc-shaped slots with an arc angle less than 180 degrees, and the axis of the first slots 2111 is radially arranged along the first end cover 211. Two first protrusions 2112 are provided on the inner wall of the first slot 2111, and the first protrusions 2112 protrude radially inward along the inner wall of the first slot 2111. The inner walls of the two first slots 2111 are spaced apart and arranged along the axis of the first slot 2111, and the first protrusions 2112 are arc-shaped and the arc surface is perpendicular to the axis of the first slot 2111.

[0036] like Figure 3 , Figure 4 As shown, the cover plate 22 is provided with a second slot body 221 corresponding to the first slot body 2111 one by one, the first slot body 2111 and the corresponding second slot body 221 are arranged opposite to each other up and down, the second slot body 221 penetrates the cover plate 22 in the radial outward direction of the cover plate 22, the second slot body 221 is an arc-shaped slot and the arc angle is less than 180 degrees, and the axis of the second slot body 221 is arranged radially along the cover plate 22. Two second protrusions 222 are provided on the inner wall of the second slot body 221, the second protrusion 222 protrudes radially inward along the inner wall of the second slot body 221, the second protrusion 222 is arc-shaped and the arc surface is perpendicular to the axis of the second slot body 221, and the two second protrusions 222 are spaced apart along the axis direction of the second slot body 221.

[0037] like Figure 5 As shown, the shaft rod 81 is inserted between the first slot body 2111 and the corresponding second slot body 221 and fixed. Specifically, the shaft rod 81 is provided with two grooves 811 in the circumferential direction, and the grooves 811 are recessed inward along the outer wall of the shaft rod 81. The two grooves 811 are spaced apart along the axial direction of the shaft rod 81. The first protrusion 2112 and the second protrusion 222 can both be inserted into the grooves 811. The first protrusion 2112 and the second protrusion 222 limit the grooves 811, so that the shaft rod 81 cannot move axially. This improves the structural stability of the blade assembly 8.

[0038] like Fig. 9 As shown, the first end cover 211 is provided with mounting holes 2113, and the mounting holes 2113 are located on both sides of the axial direction of the first slot body 2111. Figure 1When the shaft rod 81 is inserted into the first groove body 2111 and the corresponding second groove body 221, the first protrusion 2112 and the second protrusion 222 are inserted into the groove 811, and the first end cover 211 and the cover plate 22 are pressed up and down by screws to install the shaft rod 81 in place.

[0039] During specific use, according to the required working conditions, the inclination angle between the blade surface of fan blade 82 and the rotating surface of fan blade 82 can be adjusted to adjust the wind force to meet actual needs. During adjustment, the shaft rod 81 is loosened and the shaft rod 81 is rotated along the axis of the shaft rod 81 to change the inclination angle between the blade surface of fan blade 82 and the rotating surface of fan blade 82, thereby achieving wind force adjustment.

[0040] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A permanent magnet outer rotor motor, characterized in that: The invention comprises a stator assembly (1) and a rotor assembly (2), wherein the stator assembly (1) comprises a stator (12), wherein the stator (12) is fixedly mounted with a shaft (11), wherein the shaft (11) is inserted into the stator (12), wherein a stator core (121) is mounted on the outer wall of the stator (12), wherein a coil is wound around the stator core (121), wherein the rotor assembly (2) comprises a rotating sleeve (21), wherein the rotating sleeve (21) is capable of rotating around its own axis, wherein the stator core (121) is located radially inward of the rotating sleeve (21), and wherein the stator core (121) is located radially inward of the rotating sleeve (21). A plurality of magnetic steels (9) are installed on the inner wall of the rotating sleeve (21), an air gap is formed between the magnetic steels (9) and the stator core (121), a first end cover (211) is installed on the upper end of the rotating sleeve (21), a second end cover (212) is installed on the lower end of the rotating sleeve (21), the lower end of the shaft body (11) passes through the second end cover (212), the lower end of the shaft body (11) is fixedly connected to a base plate (3), the base plate (3) is located below the second end cover (212), and the shaft body (11) is inserted into the base plate (3) and fixed.

2. A permanent magnet outer rotor motor according to claim 1, characterized in that: The base plate (3) comprises a sleeve (31), the inner wall surface of the sleeve (31) is a conical surface, the shaft body (11) is provided with a conical portion (111), the conical portion (111) is inserted into the sleeve (31), the outer wall surface of the conical portion (111) abuts against the inner wall surface of the sleeve (31), and the minimum outer diameter of the conical portion (111) is greater than the minimum inner diameter of the inner wall surface of the sleeve (31).

3. A permanent magnet outer rotor motor according to claim 2, characterized in that: The sleeve (31) comprises a sleeve wall (311) located at the bottom, the sleeve wall (311) is located below the cone (111), and the cone (111) and the sleeve wall (311) are connected via a fastening component (4).

4. A fan, comprising a permanent magnet outer rotor motor according to any one of claims 1 to 3, characterized in that: A plurality of first slot bodies (2111) are provided at the radial outer end of the first end cover (211); a cover plate (22) is connected above the first end cover (211); the cover plate (22) is provided with second slot bodies (221) corresponding to the first slot bodies (2111) one by one; the first slot bodies (2111) and the corresponding second slot bodies (221) are arranged opposite to each other up and down; a fan blade assembly (8) is installed between the first end cover (211) and the cover plate (22); the fan blade assembly (8) includes a shaft rod (81); the shaft rod (81) is fixedly connected with a fan blade (82); the shaft rod (81) is inserted between the first slot body (2111) and the corresponding second slot body (221) and fixed.

5. A fan according to claim 4, characterized in that: The first groove body (2111) penetrates the first end cover (211) in a radially outward direction along the first end cover (211), and the second groove body (221) penetrates the cover plate (22) in a radially outward direction along the cover plate (22).

6. The fan according to claim 4, characterized in that: The first groove body (2111) is an arc-shaped groove, and the axis of the first groove body (2111) is arranged radially along the first end cover (211); the second groove body (221) is an arc-shaped groove, and the axis of the second groove body (221) is arranged radially along the cover plate (22).

7. A fan according to claim 4, characterized in that: At least one first protrusion (2112) is provided on the inner wall of the first groove body (2111); the first protrusion (2112) is arc-shaped and the arc-shaped surface is perpendicular to the axis of the first groove body (2111).

8. A fan according to claim 7, characterized in that: At least one second protrusion (222) is provided on the inner wall of the second groove body (221); the second protrusion (222) is arc-shaped and the arc-shaped surface is perpendicular to the axis of the second groove body (221).

9. A fan according to claim 4, characterized in that: The first end cover (211) is provided with mounting holes (2113), and the mounting holes (2113) are located on both axial sides of the first slot body (2111).

10. The fan according to claim 8, characterized in that: The shaft rod (81) is provided with a groove (811) in the circumferential direction, and the first protrusion (2112) and the second protrusion (222) can both be inserted into the groove (811).

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