Novel outer rotor permanent magnet direct current brushless motor

Abstract

The utility model relates to a novel outer rotor permanent magnet direct current brushless motor, which belongs to the technical field of permanent magnet direct current brushless, and comprises an outer rotor, a stator, a flange plate, a motor shaft and an upper cover, the motor shaft is die-cast on the center of the flange plate, and the motor shaft penetrates through the stator to be connected with the flange plate. The provided power rotating speed range is wide, compared with other brushless motor structures, the flange plate of the brushless motor is simple in structure, comprehensive in function, easy in manufacturing process implementation, waterproof and breathable, and capable of obviously reducing high temperature generated by operation of a controller and reducing internal air pressure. And as the flange plate is provided with the outer ring exhaust heat dissipation ribs, high-temperature heat generated in the operation process of the brushless motor can be effectively and timely discharged, the effects of ventilation, exhaust and heat dissipation are achieved, and the normal working effect of the motor is protected.

Description

Technical Field

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

[0002] With the increasing production of passenger cars and commercial vehicles, especially the positive growth in the production and sales of new energy vehicles, the demand for engine cooling fan assemblies has naturally increased. In particular, with the widespread growth and application of new energy vehicles, the demand for brushless cooling fans for heat dissipation of new energy vehicle battery packs has also grown rapidly, but at the same time, the requirements for brushless DC cooling fans have also increased a lot. The outer rotor permanent magnet DC motor is an important product of the cooling fan system and is the core product of the power system. The structural type, performance characteristics, and process of the brushless DC motor product determine whether the heat dissipation effect of the automobile engine and the new energy battery pack meets the standards.

[0003] The outer rotor permanent magnet brushless DC motors currently on the market (especially permanent magnet brushless DC motors used in automotive cooling fan systems) have complex motor structures and low working efficiency; the motors have a limited working range, a small power range, many production process steps, and high costs, which are not conducive to the heat dissipation needs of high-power engines, especially the heat dissipation needs of battery packs of new energy vehicles. Utility Model Content

[0004] The utility model aims to solve the above technical problems and provides a novel outer rotor permanent magnet DC brushless motor.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] A novel outer rotor permanent magnet DC brushless motor comprises an outer rotor, a stator, a flange, a motor shaft and an upper cover, wherein the motor shaft is die-cast on the center of the flange and the motor shaft passes through the stator to connect the flange;

[0007] The flange and the upper cover are connected by rivets;

[0008] The stator comprises a plastic insulating base frame and a plastic insulating upper frame connected to the outside of the plastic insulating base frame, three-phase plastic copper sheets and stator silicon steel sheets are installed on the plastic insulating base frame and the plastic insulating upper frame, and winding enameled round copper wires are arranged on the outside of the stator silicon steel sheets and the plastic insulating upper frame;

[0009] The side of the flange close to the stator is equipped with a threaded hole boss and a waterproof exhaust fixing valve for fixing the stator.

[0010] The stator is connected to a flange plate, and a plurality of magnetic tiles are installed on the inner wall of the outer rotor.

[0011] Preferably, a bearing is installed in the outer rotor, and the motor shaft is connected to the bearing.

[0012] Preferably, the stator silicon steel sheets are engraved with digital markings indicating the number of teeth and slots.

[0013] Preferably, a square hole and a positioning block for positioning and fixing the three-phase line outlet are provided on the side of the flange close to the stator, a heat dissipation cylinder and heat dissipation ribs for heat dissipation are installed on the side of the flange close to the stator, and an outer ring of the flange is installed with outer ring exhaust heat dissipation ribs.

[0014] Preferably, a mounting sheet used in conjunction with the threaded hole boss is installed on the inner side of the three-phase line plastic copper sheet.

[0015] Preferably, a controller positioning boss is installed on the side of the flange away from the stator.

[0016] After adopting the above structure, the utility model has the following advantages:

[0017] The utility model has a reasonable design structure, convenient production process, wide practicality, and a wide range of power speed. Compared with other brushless motor structures, the flange of the brushless motor of the utility model has a simple structure, comprehensive functions, and easy manufacturing process. It has the function of waterproof and breathable, and can significantly reduce the high temperature generated by the operation of the controller, reduce the internal air pressure, and prevent external water vapor from entering the internal cavity of the flange. Since the flange is designed with outer ring exhaust and heat dissipation ribs, the high-temperature heat generated during the operation of the brushless motor can be effectively discharged in time, which has the effect of ventilation, exhaust and heat dissipation, and protects the normal operation of the motor.

[0018] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is an exploded view of the utility model;

[0021] Figure 2 It is a first structural schematic diagram of the stator of the utility model;

[0022] Figure 3 It is a second structural schematic diagram of the stator of the utility model;

[0023] Figure 4 This is a first structural schematic diagram of the flange of the utility model;

[0024] Figure 5 This is a second structural schematic diagram of the flange of the utility model;

[0025] Figure 6 It is a schematic diagram of the structure of the outer rotor of the utility model;

[0026] Figure 7 It is a cross-sectional view of the outer rotor of the utility model.

[0027] As shown in the figure: 1. Outer rotor; 2. Stator; 201. Plastic insulation base frame; 202. Plastic insulation upper frame; 203. Three-phase plastic copper sheet; 204. Stator silicon steel sheet; 205. Winding enameled round copper wire; 206. Mounting plate; 3. Flange; 301. Threaded hole boss; 302. Waterproof exhaust fixing valve; 303. Square hole; 304. Positioning block; 305. Heat dissipation cylinder; 306. Heat dissipation rib; 307. Outer ring exhaust heat dissipation rib; 4. Motor shaft; 5. Upper cover; 6. Rivet; 7. Magnetic tile; 8. Bearing; 9. Controller positioning boss; 10. Controller; 11. Connector harness fixing cavity; 12. Wire harness; 13. Threaded column. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The utility model is further described in detail below in conjunction with the full text.

[0031] Combined with Figure 1-Figure 7A new type of outer rotor permanent magnet DC brushless motor includes an outer rotor 1, a stator 2, a flange 3, a motor shaft 4 and an upper cover 5. The motor shaft 4 is die-cast on the center of the flange 3 and the motor shaft 4 passes through the stator 2 to connect the flange 3. Specifically, a controller positioning boss 9 is installed on the side of the flange 3 away from the stator 2, and the controller 10 is installed on the controller positioning boss 9. A connector harness fixing cavity 11 is installed on the flange 3, and the harness 12 can pass through the connector harness fixing cavity 11 to connect the connector. The new brushless motor has a reasonable design structure and convenient process production. It can be satisfied by existing production equipment. It has excellent brushless performance and is widely used. It provides a wide range of power speeds, a smaller current than that of the same industry, and high work efficiency.

[0032] When the utility model is implemented, Figure 1 and Figure 5 As shown, the flange 3 and the upper cover 5 are connected by rivets 6; threaded columns 13 are installed on the flange 3 and the upper cover 5, and the rivets 6 are installed in the threaded columns 13 of the flange 3 and the upper cover 5 to achieve fixation.

[0033] When the utility model is implemented, Figure 1 , Figure 2 and Figure 3 As shown, the stator 2 includes a plastic insulating base frame 201 and a plastic insulating upper frame 202 connected to the outside of the plastic insulating base frame 201, and three-phase plastic copper sheets 203 and stator silicon steel sheets 204 are installed on the plastic insulating base frame 201 and the plastic insulating upper frame 202. The stator silicon steel sheets 204 and the plastic insulating upper frame 202 are provided with winding enameled round copper wires 205 on the outside. The stator silicon steel sheets 204 are engraved with digital markings of the number of teeth and the number of slots. Specifically, the stator 2 is composed of a single piece of stator silicon steel sheets 204 with a thickness of 0.5 mm, which are neatly and orderly stacked together. , plastic insulating base frame 201, plastic insulating upper frame 202, three-phase plastic copper sheet 203, winding enameled round copper wire 205 are connected together, and the new brushless motor stator assembly composed of the above parts is an important component of the brushless motor. Through the digital markings of the number of teeth and slots on the stator silicon steel sheet 204, the new brushless motor stator can be accurately positioned and assembled during the assembly of semi-finished products. The structure is simple and the production process is easy to operate. It can be mass-produced under the conditions of existing production equipment and can meet the production process of large quantities.

[0034] When the utility model is implemented, as 1, Figure 4 and Figure 5As shown, a threaded hole boss 301 and a waterproof exhaust fixing valve 302 for fixing the stator 2 are installed on the side of the flange 3 close to the stator 2, a square hole 303 and a positioning block 304 for positioning and fixing the three-phase line outlet are provided on the side of the flange 3 close to the stator 2, a heat dissipation cylinder 305 and a heat dissipation rib 306 for heat dissipation are installed on the side of the flange 3 close to the stator 2, and an outer ring exhaust heat dissipation rib 307 is installed on the outer ring of the flange 3. Specifically, the flange 3 is made of aluminum alloy material by die-casting, and the motor shaft 4 is die-cast on the central inner circle of the flange 3. The new brushless motor flange assembly, the flange body is made of aluminum alloy material by die-casting, and the motor shaft is die-cast on the flange The inner circle of the disk center, compared with other brushless motor structures, the brushless motor flange 3 of the utility model has a simple structure, comprehensive functions and easy manufacturing process. The brushless motor flange 3 of the utility model is installed and fixed with electronic components and controller components. At the same time, the waterproof exhaust fixed valve 302 has the function of a waterproof and breathable cavity, which can significantly reduce the high temperature generated by the operation of the controller, reduce the internal air pressure, and prevent external water vapor from entering the internal cavity of the flange 3. Since the flange 3 is designed with an outer ring exhaust heat dissipation rib 307, the high-temperature heat generated during the operation of the brushless motor can be effectively discharged in time, which has the effect of ventilation, exhaust and heat dissipation, and protects the normal working function of the motor.

[0035] When the utility model is implemented, Figure 1 , Figure 6 and Figure 7 As shown, a bearing 8 is installed in the outer rotor 1, the motor shaft 4 is connected to the bearing 8, the stator 2 is connected to the flange 3, and a plurality of magnetic tiles 7 are installed on the inner wall of the outer rotor 1. Specifically, the outer rotor 1 is composed of 5 tile-shaped ferrites (magnetic tiles 7) which are fixed by adhesive on the inner circular surface of the casing made of a carbon steel plate with a thickness of 2.5 mm. The outer rotor 1 contains a bearing 8, which can be a ball bearing. When the ball bearing is installed, it also includes commonly used components such as a plastic bearing retaining ring, a locking ring, and an O-ring, which can ensure the normal operation of the ball bearing, provide a mechanical structure function for installing and fixing the fan, and also provide a rotating function. When the brushless motor is powered on, it drives the external product to generate effective mechanical energy.

[0036] A mounting sheet 206 that cooperates with the threaded hole boss 301 is mounted on the inner side of the three-phase wire plastic copper sheet 203 .

[0037] The working principle of this utility model:

[0038] The utility model is connected by fixing the upper cover and the flange with rivets, the stator and the flange are connected, the motor shaft on the flange passes through the stator and is connected to the bearing in the outer rotor, the stator is energized and the magnetic tile generates a magnetic field, which drives the outer rotor to rotate. The new brushless motor has a reasonable design structure and convenient process production, which can be met by existing production equipment. It has excellent brushless performance, is widely used, and provides a wide range of power speed. Compared with other brushless motor structures, the flange of the brushless motor of the utility model has a simple structure, comprehensive functions, and easy manufacturing process. It has the functions of waterproof and breathable, which can significantly reduce the high temperature generated by the operation of the controller, reduce the internal air pressure, and prevent external water vapor from entering the internal cavity of the flange. Since the flange is designed with outer ring exhaust and heat dissipation ribs, it can effectively discharge the high temperature heat generated during the operation of the brushless motor in time, achieve the effect of ventilation, exhaust and heat dissipation, and protect the normal operation of the motor.

[0039] The above describes the utility model and its implementation methods, which is not restrictive. What is shown in the full text is only one of the implementation methods of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A novel outer rotor permanent magnet DC brushless motor, comprising an outer rotor (1), a stator (2), a flange (3), a motor shaft (4) and an upper cover (5), characterized in that: The motor shaft (4) is die-cast on the center of the flange (3) and the motor shaft (4) passes through the stator (2) and is connected to the flange (3); The flange (3) and the upper cover (5) are connected via rivets (6); The stator (2) comprises a plastic insulating base frame (201) and a plastic insulating upper frame (202) connected to the outside of the plastic insulating base frame (201), three-phase plastic copper sheets (203) and stator silicon steel sheets (204) are installed on the plastic insulating base frame (201) and the plastic insulating upper frame (202), and winding enameled round copper wires (205) are provided on the outside of the stator silicon steel sheets (204) and the plastic insulating upper frame (202); A threaded hole boss (301) for fixing the stator (2) and a waterproof exhaust fixing valve (302) are installed on one side of the flange (3) close to the stator (2). The stator (2) is connected to a flange (3), and a plurality of magnetic tiles (7) are installed on the inner wall of the outer rotor (1).

2. According to claim 1, a novel outer rotor permanent magnet DC brushless motor is characterized in that: A bearing (8) is installed inside the outer rotor (1), and the motor shaft (4) is connected to the bearing (8).

3. According to the novel outer rotor permanent magnet DC brushless motor of claim 1, it is characterized in that: The stator silicon steel sheet (204) is engraved with digital markings of the number of teeth and the number of slots.

4. According to the novel outer rotor permanent magnet DC brushless motor of claim 1, it is characterized in that: A square hole (303) and a positioning block (304) for positioning and fixing the three-phase outlet line are provided on a side of the flange (3) close to the stator (2); a heat dissipation cylinder (305) and heat dissipation ribs (306) for heat dissipation are installed on a side of the flange (3) close to the stator (2); and an outer ring exhaust heat dissipation rib (307) is installed on the outer ring of the flange (3).

5. According to the novel outer rotor permanent magnet DC brushless motor of claim 1, it is characterized by: A mounting sheet (206) used in conjunction with the threaded hole boss (301) is mounted on the inner side of the three-phase wire plastic copper sheet (203).

6. According to the novel outer rotor permanent magnet DC brushless motor of claim 1, it is characterized by: A controller positioning boss (9) is installed on the side of the flange (3) away from the stator (2).

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