Special-shaped outer rotor structure, motor assembly and generator device

Abstract

The utility model relates to the technical field of outer rotors, in particular to a special-shaped outer rotor structure, a motor assembly and a generator device, and the special-shaped outer rotor structure comprises an annular part, a plurality of rotor magnetic gathering iron cores, a plurality of first magnetic parts and a plurality of second magnetic parts. The rotor magnetism gathering iron core comprises a sector ring fitting part, and the circle center of the sector ring fitting part is overlapped with the circle center of the annular piece; the plurality of rotor magnetic gathering iron cores are distributed on the inner ring surface of the annular piece at equal intervals, a first gap exists between the outer ring surface of the sector ring fitting part and the inner ring surface of the annular piece, a second gap exists between the adjacent rotor magnetic gathering iron cores, and the plurality of second gaps are radially arranged around the circle center of the annular piece; the first gap and the two adjacent second gaps are communicated and combined to form a special-shaped magnetic steel groove. The special-shaped magnetic steel groove is used for installing the first magnetic piece and the second magnetic piece. According to the utility model, reasonable design of the magnetic members and the magnetic steel grooves can be ensured, air gaps are reduced, and magnetic field intensity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of outer rotors, in particular to a special-shaped outer rotor structure, a motor component and a generator device. Background Art

[0002] The outer rotor structure is a special motor structure in which the stator is located inside and the rotor is located outside. This structure allows the motor housing to rotate with the rotor, while the stator core in the middle is fixed. Compared with traditional inner rotor motors, outer rotor motors have some unique advantages and application scenarios. Outer rotor motors are widely used in various fields, such as industrial machinery, power tools, household appliances, etc. They can be used to drive equipment such as fans, pumps, compressors, and can also be used to achieve precise speed control and position control.

[0003] During the design of the outer rotor motor, if the design of the magnetic parts and the magnetic steel slots is unreasonable, such as the air gap is too large or the shape of the magnetic parts is not suitable, leakage flux may occur. Leakage flux means that the magnetic field energy is not fully utilized to generate torque, but leaks to the outside of the motor. This leads to lower efficiency of the motor because more electrical energy is converted into heat energy rather than mechanical energy. Furthermore, leakage flux weakens the magnetic field strength, resulting in a decrease in the torque and electromagnetic performance of the outer rotor motor. This may cause the outer rotor motor to perform poorly in applications that require high torque or precise control. Utility Model Content

[0004] The utility model aims to provide a special-shaped outer rotor structure, a motor assembly and a generator device, which can ensure the reasonable design of magnetic parts and magnetic steel slots, reduce air gaps and improve magnetic field strength.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A special-shaped outer rotor structure comprises an annular member, a plurality of rotor magnetic cores, a plurality of first magnetic members and a plurality of second magnetic members;

[0007] The rotor magnet core comprises a sector ring fitting portion, the center of which overlaps with the center of the annular member;

[0008] A plurality of the rotor magnet cores are distributed on the inner ring surface of the annular component at equal intervals, and a first gap exists between the outer ring surface of the fan ring fitting portion and the inner ring surface of the annular component, and a second gap exists between adjacent rotor magnet cores. The arrangement of the plurality of the second gaps is radially arranged with respect to the center of the annular component, and the first gap and two adjacent second gaps are connected and combined to form a special-shaped magnetic steel slot;

[0009] The special-shaped magnetic steel groove is used to install the first magnetic component and the second magnetic component;

[0010] The second magnetic member is installed in the first gap, and the second magnetic member is respectively installed in contact with the inner annular surface of the annular member and the outer annular surface of the sector ring contact portion;

[0011] The first magnetic component is installed in the second gap, and the first magnetic component is installed in a fit with the inner ring surface of the annular component, and the two sides of the first magnetic component are respectively installed in a fit with the side surfaces of two adjacent fan ring fitting parts.

[0012] Preferably, one end surface of the first magnetic member close to the annular member is an annular surface, the other end surface of the first magnetic member away from the annular member is a flat surface, and both side surfaces of the first magnetic member are flat surfaces;

[0013] The second magnetic part is a fan-shaped magnetic part. The fitting surface of the second magnetic part close to the ring part and the fitting surface close to the rotor magnetic core are both ring surfaces. The two end surfaces of the second magnetic part are fitted with the two side surfaces of the adjacent first magnetic part, and the center of the second magnetic part overlaps with the center of the ring part.

[0014] Preferably, one end surface of the first magnetic member close to the annular member is a conical surface, the other end surface of the first magnetic member away from the annular member is a flat surface, and both side surfaces of the first magnetic member are flat surfaces;

[0015] The second magnetic part is a fan-shaped annular magnetic part. The fitting surface of the second magnetic part close to the annular part and the fitting surface close to the rotor magnetic core are both annular surfaces. Both end surfaces of the second magnetic part are inclined surfaces, and both end surfaces of the second magnetic part are fitted with the two side surfaces of the adjacent first magnetic part. The center of the second magnetic part overlaps with the center of the annular part.

[0016] Preferably, one end surface of the first magnetic member close to the annular member is connected to one end surface of the second magnetic member, the first magnetic member and the second magnetic member are connected by a transition bevel, the transition bevel has an outer bevel of a main body and an inner bevel of a main body, one end surface of the rotor magnetic core close to the transition bevel is a first bevel, and the first bevel fits with the inner bevel of the main body;

[0017] The other end surface of the first magnetic member away from the annular member is a flat surface, and one end surface of the second magnetic member is a second inclined surface, and the second inclined surface is in contact with the outer inclined surface of the body.

[0018] Preferably, the first magnetic component and the second magnetic component are made of neodymium iron boron, and 2mm≤thickness H1 of the first magnetic component≤6mm, 2mm≤thickness H2 of the second magnetic component≤6mm, 2mm≤width W1 of the first magnetic component≤6mm, and 2mm≤width W2 of the second magnetic component≤6mm.

[0019] Preferably, the first magnetic component and the second magnetic component are ferrite, and 4mm≤thickness H1 of the first magnetic component≤10mm, 4mm≤thickness H2 of the second magnetic component≤10mm, 4mm≤width W1 of the first magnetic component≤10mm, 4mm≤width W2 of the first magnetic component≤10mm.

[0020] Preferably, the rotor magnet core further comprises two positioning hooks protruding from the inner annular surface of the fan ring fitting portion;

[0021] The two positioning hooks are used to hook the first magnetic member and fit with the first magnetic member.

[0022] Preferably, when a plurality of the first magnetic members are fitted and mounted on both sides of a plurality of the rotor magnet cores, a third gap exists between two positioning hooks of adjacent rotor magnet cores.

[0023] Preferably, the minimum spacing L of the third gap is ≥1 mm, and the length of the third gap is ≤80% of the thickness H1 of the first magnetic member.

[0024] A motor assembly comprises a central rotating shaft, an inner stator structure and a special-shaped outer rotor structure as described above;

[0025] The central rotating shaft and the inner stator structure are installed in the mounting hole of the special-shaped outer rotor structure, the inner stator structure and the special-shaped outer rotor structure are sequentially sleeved on the outer circumference of the central rotating shaft, and the special-shaped outer rotor structure rotates relative to the stator structure;

[0026] The inner stator structure includes a stator ring core and a plurality of stator teeth extending radially outward from the stator ring core, wherein the plurality of stator teeth are circumferentially distributed around the axis of the stator core, stator windings are wound around the stator teeth, and the stator teeth are in contact with the rotor magnetic core of the special-shaped outer rotor structure.

[0027] A generator device comprises a first housing, a second housing and a motor assembly as described above;

[0028] The first shell and the second shell are respectively installed on two sides of the motor assembly, and two ends of the central rotating shaft are respectively penetrated through the first shell and the second shell;

[0029] The annular member is provided with a first circular mounting hole;

[0030] The first shell and the second shell are provided with a second circular mounting hole corresponding to the first circular mounting hole, and the first circular mounting hole and the second circular mounting hole are used for correspondingly passing fasteners.

[0031] One of the above technical solutions has the following beneficial effects: according to the shape of the rotor magnet core, two first magnetic parts and one second magnetic part are placed in the special-shaped magnetic steel slots and are installed in a ∏ shape on the three sides of the rotor magnet core. Not only does there exist no air gap, but also a magnetic pole is formed according to the simulated distribution of the magnetic force in use. Since a first magnetic part is shared between adjacent magnetic poles, that is, both the N and S sides of the first magnetic part are used, magnetic force and coupling are provided for adjacent N or S magnetic poles; the rotor magnetic poles of the known outer rotor motor are N and S pole pairs, so the two first magnetic parts are coupled to form an N or S pole for use. The number of first magnetic parts in this outer rotor structure is a multiple of the rotor magnetic pole pairs and a multiple of the number of magnetic poles.

[0032] Through the above-mentioned setting, when the outer rotor structure is coordinated with the inner stator structure, the magnetic leakage inside and outside the outer rotor motor can be reduced or eliminated, the utilization effect of the first magnetic part and the second magnetic part can be enhanced, the magnetic concentration ability and anti-demagnetization ability can be improved, thereby improving the power density, increasing the torque, simplifying the production process, and reducing the motor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model in a special-shaped outer rotor structure;

[0034] Figure 2 It is a structural schematic diagram of the second embodiment of the utility model in a special-shaped outer rotor structure;

[0035] Figure 3 It is a structural schematic diagram of the third embodiment of the utility model in a special-shaped outer rotor structure;

[0036] Figure 4 It is a front view schematic diagram of the first embodiment of the utility model in a special-shaped outer rotor structure;

[0037] Figure 5 It is a parameter diagram of the first magnetic component in the first embodiment of a special-shaped outer rotor structure of the utility model;

[0038] Figure 6 It is a parameter diagram of the second magnetic member in the first embodiment of a special-shaped outer rotor structure of the utility model;

[0039] Figure 7 It is a structural schematic diagram of a motor component of the utility model;

[0040] Figure 8 It is an exploded schematic diagram of a motor component of the utility model;

[0041] Fig. 9 It is a structural schematic diagram of a generator device of the utility model;

[0042] Fig.10 It is an exploded schematic diagram of a generator device of the utility model;

[0043] In the accompanying drawings: an annular part 1, a first circular mounting hole 10, a rotor magnetic core 2, a trapezoidal fitting portion 21, a positioning hook 22, a first magnetic part 3, a second magnetic part 4, a special-shaped magnetic steel slot 5, a first gap 51, a second gap 52, a third gap 6, a transition bevel 7, a central rotating shaft 100, an inner stator structure 200, a special-shaped outer rotor structure 300, a motor assembly 400, a generator device 500, a first shell 600, a second shell 700, and a second circular mounting hole 800. DETAILED DESCRIPTION

[0044] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0047] In the description of the present invention, 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] like Figure 1-6 As shown, a special-shaped outer rotor structure includes an annular member 1, a plurality of rotor magnetic cores 2, a plurality of first magnetic members 3 and a plurality of second magnetic members 4;

[0049] The rotor magnet core 2 comprises a sector ring fitting portion 21, the center of which overlaps with the center of the ring member 1;

[0050] A plurality of the rotor magnet cores 2 are distributed on the inner ring surface of the ring member 1 at equal intervals, and a first gap 51 exists between the outer ring surface of the fan ring fitting portion 21 and the inner ring surface of the ring member 1, and a second gap 52 exists between adjacent rotor magnet cores 2. The arrangement of the plurality of the second gaps 52 is radially arranged with respect to the center of the ring member 1, and the first gap 51 and two adjacent second gaps 52 are connected and combined to form a special-shaped magnetic steel slot 5;

[0051] The special-shaped magnetic steel groove 5 is used to install the first magnetic component 3 and the second magnetic component 4;

[0052] The second magnetic member 4 is installed in the first gap 51, and the second magnetic member 4 is respectively installed in contact with the inner annular surface of the annular member 1 and the outer annular surface of the sector ring contact portion 21;

[0053] The first magnetic component 3 is installed in the second gap 52 , and the first magnetic component 3 is installed in abutment with the inner ring surface of the annular component 1 , and the two sides of the first magnetic component 3 are installed in abutment with the side surfaces of the two adjacent fan ring fitting parts 21 .

[0054] According to the shape of the rotor magnet core 2, two first magnetic parts 3 and one second magnetic part 4 are placed in the special-shaped magnetic steel slot 5 and are installed in a ∏ shape on the three sides of the rotor magnet core 2. Not only does there exist no air gap, but also a magnetic pole is formed according to the simulated distribution of the magnetic force in use. Since one first magnetic part 3 is shared between adjacent magnetic poles, that is, both the N and S sides of the first magnetic part 3 are used, magnetic force and coupling are provided for adjacent N or S magnetic poles; the rotor magnetic poles of the known outer rotor motor are N and S pole pairs, so the two first magnetic parts 3 are coupled to form one N or S pole for use. The number of first magnetic parts 3 in this outer rotor structure is twice the number of rotor magnetic poles and four times the number of magnetic poles.

[0055] Through the above-mentioned setting, when the outer rotor structure is coordinated with the inner stator structure, the magnetic leakage inside and outside the outer rotor motor can be reduced or eliminated, the utilization effect of the first magnetic part 3 and the second magnetic part 4 can be enhanced, the magnetic concentration ability and anti-demagnetization ability can be improved, thereby improving the power density, increasing the torque, simplifying the production process, and reducing the motor cost.

[0056] Further explanation, such as Figure 1 As shown, the utility model is further configured as follows: one end surface of the first magnetic member 3 close to the annular member 1 is an annular surface, the other end surface of the first magnetic member 3 away from the annular member 1 is a flat surface, and both side surfaces of the first magnetic member 3 are flat surfaces;

[0057] The second magnetic part 4 is a fan-shaped magnetic part. The fitting surface of the second magnetic part 4 close to the ring part 1 and the fitting surface close to the rotor magnetic core 2 are both annular surfaces. The two end surfaces of the second magnetic part 4 are fitted with the two side surfaces of the adjacent first magnetic part 3, and the center of the second magnetic part 4 overlaps with the center of the ring part 1.

[0058] Further explanation, such as Figure 2 As shown, the utility model is further configured as follows: one end surface of the first magnetic member 3 close to the annular member 1 is a conical surface, the other end surface of the first magnetic member 3 away from the annular member 1 is a flat surface, and both side surfaces of the first magnetic member 3 are flat surfaces;

[0059] The second magnetic part 4 is a fan-shaped magnetic part, and the fitting surface of the second magnetic part 4 close to the ring part 1 and the fitting surface close to the rotor magnetic core 2 are both annular surfaces. Both end surfaces of the second magnetic part 4 are inclined surfaces, and both end surfaces of the second magnetic part 4 are fitted with the two side surfaces of the adjacent first magnetic part 3, and the center of the second magnetic part 4 overlaps with the center of the ring part 1.

[0060] Further explanation, such as Figure 3 As shown, the utility model is further configured as follows: one end face of the first magnetic member 3 close to the annular member 1 is connected to one end face of the second magnetic member 4, the first magnetic member 3 and the second magnetic member 4 are connected by a transition bevel 7, the transition bevel 7 has an outer bevel of the main body and an inner bevel of the main body, one end face of the rotor magnet core 2 close to the transition bevel 7 is a first bevel, and the first bevel is in contact with the inner bevel of the main body;

[0061] The other end surface of the first magnetic member 3 away from the annular member 1 is a flat surface, and one end surface of the second magnetic member 4 is a second inclined surface, and the second inclined surface is in contact with the outer inclined surface of the body.

[0062] In order to reduce or eliminate magnetic leakage inside and outside the outer rotor motor, the utility model proposes three embodiments. The shape of the first magnetic part 3 and the first magnetic part 3 are designed according to the circular ring shape of the annular part 1 and the fan ring shape of the rotor magnetic core 2.

[0063] To further explain, the first magnetic component 3 and the second magnetic component 4 are made of neodymium iron boron, and 2mm≤the thickness H1 of the first magnetic component 3≤6mm, 2mm≤the thickness H2 of the second magnetic component 4≤6mm, 2mm≤the width W1 of the first magnetic component 3≤6mm, 2mm≤the width W2 of the second magnetic component 4≤6mm.

[0064] To further explain, the first magnetic component 3 and the second magnetic component 4 are ferrite, and 4mm≤the thickness H1 of the first magnetic component 3≤10mm, 4mm≤the thickness H2 of the second magnetic component 4≤10mm, 4mm≤the width W1 of the first magnetic component 3≤10mm, 4mm≤the width W2 of the first magnetic component 3≤10mm.

[0065] Based on the fit-fitting installation of the first magnetic component 3 and the second magnetic component 4 in the special-shaped magnetic steel groove 5, the overall space is fully utilized. Different thicknesses and thicknesses are set according to the performance of different materials without increasing the overall size, which can improve the magnetic gathering ability and anti-demagnetization ability while ensuring sufficient safety.

[0066] To further explain, the rotor magnet core 2 further includes two positioning hooks 22 protruding from the inner annular surface of the fan ring fitting portion 21;

[0067] The two positioning hooks 22 are used to hook the first magnetic member 3 and fit with the first magnetic member 3 .

[0068] To further explain, when a plurality of the first magnetic members 3 are fitted and installed on both sides of a plurality of the rotor magnet cores 2 , a third gap 6 exists between two positioning hooks 22 of adjacent rotor magnet cores 2 .

[0069] To further explain, the minimum spacing L of the third gap 6 is ≥1 mm, and the length of the third gap 6 is ≤80% of the thickness H1 of the first magnetic member 3 .

[0070] Through the above arrangement, the third gap 6 can not only reduce the leakage flux of the first magnetic parts 3 and the second magnetic parts 4, and improve the magnetic flux density of the outer rotor structure, thereby improving the torque of the motor assembly, but also reduce the weight of the outer rotor structure and improve the working efficiency of the motor assembly.

[0071] like Figure 7-8 As shown, a motor assembly 400 includes a central rotating shaft 100, an inner stator structure 200 and a special-shaped outer rotor structure 300 as described above;

[0072] The central rotating shaft 100 and the inner stator structure 200 are installed in the mounting hole of the special-shaped outer rotor structure 300. The inner stator structure 200 and the special-shaped outer rotor structure 300 are sequentially sleeved on the outer circumference of the central rotating shaft 100, and the special-shaped outer rotor structure 300 rotates relative to the stator structure.

[0073] The inner stator structure 200 includes a stator ring core 201 and a plurality of stator teeth 202 extending radially outward from the stator ring core 201. The plurality of stator teeth 202 are circumferentially distributed around the axis of the stator core. Stator windings are wound around the stator teeth 202. The stator teeth 202 are in contact with the rotor magnetic core 2 of the special-shaped outer rotor structure 300.

[0074] In order to ensure the normal operation and performance of the outer rotor structure motor assembly 400, the inner stator structure 200 is abutted against the special-shaped outer rotor structure 300, so that the first magnetic part 3 and the second magnetic part 4 are installed in close proximity with the special-shaped magnetic steel slot 5 without an air gap, thereby improving the magnetic concentration ability and anti-demagnetization ability.

[0075] like Figure 9-10 As shown, a generator device 500 includes a first housing 600, a second housing 700 and a motor assembly 400 as described above;

[0076] The first shell 600 and the second shell 700 are respectively installed on two sides of the motor assembly 400, and the two ends of the central rotating shaft 100 are respectively penetrated by the first shell 600 and the second shell 700;

[0077] The annular member 1 defines a first circular mounting hole 10;

[0078] The first shell 600 and the second shell 700 are provided with second circular mounting holes 800 corresponding to the first circular mounting holes. The first circular mounting holes and the second circular mounting holes 800 are used for correspondingly passing fasteners.

[0079] Through the above arrangement, not only the first housing 600 , the second housing 700 and the motor assembly 400 can be fastened and installed by fasteners, i.e. screws, but also unnecessary materials of the annular member 1 are reduced, thereby reducing the weight of the special-shaped outer rotor structure 300 .

[0080] Since the generator device 500 is provided with the motor assembly 400, the generator device 500 has the beneficial effects of the motor assembly 400, which will not be described in detail herein.

[0081] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A special-shaped outer rotor structure, characterized in that: It comprises an annular member (1), a plurality of rotor magnetic cores (2), a plurality of first magnetic members (3) and a plurality of second magnetic members (4); The rotor magnetic core (2) comprises a sector ring fitting portion (21), the center of the sector ring fitting portion (21) overlapping with the center of the ring member (1); A plurality of the rotor magnet cores (2) are distributed at equal intervals on the inner ring surface of the annular member (1), and a first gap (51) exists between the outer ring surface of the fan ring fitting portion (21) and the inner ring surface of the annular member (1), and a second gap (52) exists between adjacent rotor magnet cores (2), and a plurality of the second gaps (52) are arranged radially with respect to the center of the annular member (1), and the first gap (51) and two adjacent second gaps (52) are connected and combined to form a special-shaped magnetic steel slot (5); The special-shaped magnetic steel groove (5) is used to install the first magnetic component (3) and the second magnetic component (4); The second magnetic member (4) is installed in the first gap (51), and the second magnetic member (4) is respectively installed in contact with the inner annular surface of the annular member (1) and the outer annular surface of the sector ring contact portion (21); The first magnetic component (3) is installed in the second gap (52), and the first magnetic component (3) is installed in abutment with the inner ring surface of the annular component (1), and the two sides of the first magnetic component (3) are respectively installed in abutment with the side surfaces of two adjacent fan ring fitting parts (21).

2. The special-shaped outer rotor structure according to claim 1, characterized in that: One end surface of the first magnetic member (3) close to the annular member (1) is an annular surface, the other end surface of the first magnetic member (3) away from the annular member (1) is a flat surface, and both side surfaces of the first magnetic member (3) are flat surfaces; The second magnetic component (4) is a fan-shaped annular magnetic component. The fitting surface of the second magnetic component (4) close to the annular component (1) and the fitting surface close to the rotor magnetic core (2) are both annular surfaces. Both end surfaces of the second magnetic component (4) fit with the two side surfaces of the adjacent first magnetic component (3), and the center of the second magnetic component (4) overlaps with the center of the annular component (1).

3. The special-shaped outer rotor structure according to claim 1, characterized in that: One end surface of the first magnetic member (3) close to the annular member (1) is a conical surface, the other end surface of the first magnetic member (3) away from the annular member (1) is a flat surface, and both side surfaces of the first magnetic member (3) are flat surfaces; The second magnetic component (4) is a fan-shaped magnetic component. The fitting surface of the second magnetic component (4) close to the ring component (1) and the fitting surface close to the rotor magnetic core (2) are both ring-shaped surfaces. Both end surfaces of the second magnetic component (4) are inclined surfaces. Both end surfaces of the second magnetic component (4) fit with the two side surfaces of the adjacent first magnetic component (3). The center of the second magnetic component (4) overlaps with the center of the ring component (1).

4. The special-shaped outer rotor structure according to claim 1, characterized in that: One end surface of the first magnetic member (3) close to the annular member (1) is connected to one end surface of the second magnetic member (4); the first magnetic member (3) and the second magnetic member (4) are connected via a transition bevel (7); the transition bevel (7) has an outer bevel of a main body and an inner bevel of a main body; one end surface of the rotor magnetic core (2) close to the transition bevel (7) is a first bevel, and the first bevel is in contact with the inner bevel of the main body; The other end surface of the first magnetic member (3) away from the annular member (1) is a flat surface, and one end surface of the second magnetic member (4) is a second inclined surface, and the second inclined surface is in contact with the outer inclined surface of the main body.

5. A special-shaped outer rotor structure according to any one of claims 2 to 4, characterized in that: The first magnetic component (3) and the second magnetic component (4) are made of neodymium iron boron, and 2mm≤the thickness H1 of the first magnetic component (3)≤6mm, 2mm≤the thickness H2 of the second magnetic component (4)≤6mm, 2mm≤the width W1 of the first magnetic component (3)≤6mm, and 2mm≤the width W2 of the second magnetic component (4)≤6mm.

6. A special-shaped outer rotor structure according to any one of claims 2 to 4, characterized in that: The first magnetic component (3) and the second magnetic component (4) are ferrites, and 4 mm ≤ the thickness H1 of the first magnetic component (3) ≤ 10 mm, 4 mm ≤ the thickness H2 of the second magnetic component (4) ≤ 10 mm, 4 mm ≤ the width W1 of the first magnetic component (3) ≤ 10 mm, and 4 mm ≤ the width W2 of the first magnetic component (3) ≤ 10 mm.

7. The special-shaped outer rotor structure according to claim 1, characterized in that: The rotor magnet core (2) further comprises two positioning hooks (22) protruding from the inner annular surface of the fan ring fitting portion (21); The two positioning hooks (22) are used to hook the first magnetic part (3) and fit with the first magnetic part (3).

8. The special-shaped outer rotor structure according to claim 7, characterized in that: When a plurality of the first magnetic members (3) are fitted and installed on both sides of a plurality of the rotor magnet cores (2), a third gap (6) exists between two positioning hooks (22) of adjacent rotor magnet cores (2).

9. The special-shaped outer rotor structure according to claim 8, characterized in that: The minimum spacing L of the third gap (6) is ≥1 mm, and the length of the third gap (6) is ≤80% of the thickness H1 of the first magnetic member (3).

10. A motor assembly (400), characterized in that: It comprises a central rotating shaft (100), an inner stator structure (200), and a special-shaped outer rotor structure (300) as claimed in any one of claims 1 to 9; The central rotating shaft (100) and the inner stator structure (200) are installed in the installation hole of the special-shaped outer rotor structure (300); the inner stator structure (200) and the special-shaped outer rotor structure (300) are sequentially sleeved on the outer circumference of the central rotating shaft (100); and the special-shaped outer rotor structure (300) rotates relative to the stator structure; The inner stator structure (200) comprises a stator ring core (201) and a plurality of stator teeth (202) extending radially outward from the stator ring core (201); the plurality of stator teeth (202) are circumferentially distributed around the axis of the stator ring core; stator windings are wound around the stator teeth (202); and the stator teeth (202) are in contact with the rotor magnet core (2) of the special-shaped outer rotor structure (300).

11. A generator device (500), characterized in that: It comprises a first housing (600), a second housing (700) and a motor assembly (400) as claimed in claim 10; The first shell (600) and the second shell (700) are respectively mounted on two sides of the motor assembly (400), and two ends of the central rotating shaft (100) are respectively passed through the first shell (600) and the second shell (700); The annular member (1) is provided with a first circular mounting hole (10); The first shell (600) and the second shell (700) are provided with second circular mounting holes (800) corresponding to the first circular mounting holes, and the first circular mounting holes and the second circular mounting holes (800) are used for correspondingly passing fasteners.

Images