CN112838730A

CN112838730A - Disc type motor and two-wheeled electric vehicle

Info

Publication number: CN112838730A
Application number: CN202110208838.XA
Authority: CN
Inventors: 王永生; 姜亚军; 刘刚; 韦士富
Original assignee: Yadea Technology Group Co Ltd
Current assignee: Yadea Technology Group Co Ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-05-25

Abstract

The invention belongs to the technical field of vehicles and discloses a disc type motor and a two-wheeled electric vehicle. The disc motor includes a motor shaft; the stator mechanism is sleeved on the motor shaft; the rotor mechanism, the rotor mechanism includes radial rotor subassembly and two axial rotor subassemblies of connecting respectively in radial rotor subassembly, stator mechanism's cylindrical surface is located to radial rotor subassembly ring, stator mechanism's the radial direction setting is followed to radial rotor subassembly's the direction of magnetizing, two axial rotor subassemblies set up respectively in stator mechanism along stator mechanism axial direction's both sides, axial rotor subassembly's the direction of magnetizing sets up along stator mechanism's axial direction. The disc type motor forms a three-rotor structure, so that the disc type motor can provide larger torque under the same volume, and the torque density of the motor is improved. The stator mechanism is utilized to be matched with the three rotor assemblies, the weight of the whole disc type motor is reduced while the torque density is ensured, and the requirement of light weight is met.

Description

Disc type motor and two-wheeled electric vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a disk type motor and a two-wheeled electric vehicle.

Background

The hub motor of the existing two-wheeled electric vehicle works in a direct-drive mode, has the advantages of simple structure, reliable operation and the like, is integrated in a wheel, and is convenient to adapt to different frames. One type of the hub motor is a disc motor, and the disc motor is widely applied to the field of electric two-wheeled vehicles due to the advantages of small size, light weight, high efficiency, compact structure and the like.

The torque density of the disc type motor is the rated torque output on the motor shaft in unit volume, the existing disc type motor is generally in a single-rotor structure, and the torque density of the motor is low. The number of the rotors can be increased in order to improve the torque density, but each rotor needs a stator corresponding to the rotor, so that the occupied space of the disc motor is large, the whole weight is large, the requirement of the driving range of the whole vehicle is not facilitated, and the riding experience of a user is low.

Disclosure of Invention

The invention aims to provide a disk motor and a two-wheeled electric vehicle, which can meet the requirements of improving torque density and reducing the whole weight.

In order to achieve the purpose, the invention adopts the following technical scheme:

a disk motor comprising a motor shaft, further comprising:

the stator mechanism is sleeved on the motor shaft;

rotor mechanism, rotor mechanism include radial rotor subassembly and two connect respectively in radial rotor subassembly's axial rotor subassembly, radial rotor subassembly ring is located stator mechanism's excircle surface, radial rotor subassembly magnetize the direction and follow stator mechanism's radial direction sets up, two axial rotor subassembly set up respectively in stator mechanism follows stator mechanism axial direction's both sides, axial rotor subassembly magnetize the direction and follow stator mechanism's axial direction sets up.

Preferably, radial rotor subassembly includes rim, radial rotor core and a plurality of radial magnet steel, radial rotor core is the loop configuration, radial rotor core's outer wall set up in the rim and with the inner wall of rim is laminated mutually, radial rotor core's inner wall cover is located the outside of stator mechanism is a plurality of radial magnet steel is followed stator mechanism's circumference evenly sets up and set up in radial rotor core's inner wall with between the stator mechanism.

Preferably, the magnetic poles of two adjacent radial magnetic steels are opposite.

Preferably, every axial rotor subassembly all includes axial rotor core, a plurality of axial magnet steel, axial rotor core connect in radial rotor core axial rotor core's inboard is provided with a plurality of axial magnet steels, and is a plurality of axial magnet steel is followed stator mechanism's circumference direction evenly sets up.

Preferably, the magnetic poles of two adjacent axial magnetic steels are opposite.

Preferably, the number of the axial magnetic steels is the same as that of the radial magnetic steels, one of the radial magnetic steels and two of the radial magnetic steels are respectively and symmetrically arranged on the radial magnetic steels along the axial direction two sides of the stator mechanism to form a magnetic pole, and the magnetizing direction of the magnetic pole faces towards or is far away from the stator mechanism.

Preferably, the stator mechanism comprises a plurality of stator assemblies, and the plurality of stator assemblies are spliced to form an annular structure.

Preferably, each of the stator assemblies includes:

a stator core provided with stator slots;

the winding framework is arranged in the stator slot;

the winding coil is wound on the winding framework;

stator teeth disposed on a side of the stator core and connected to the motor shaft.

Preferably, the stator core comprises a plurality of stator punching sheets which are arranged in a stacked mode.

To achieve the purpose, the invention also provides a two-wheeled electric vehicle which comprises the disc type motor.

The invention has the beneficial effects that:

according to the disc type motor provided by the invention, the radial rotor assembly and the two axial rotor assemblies are arranged to form a three-rotor structure, so that the disc type motor can provide larger torque under the same volume, and the torque density of the motor is improved. Locate stator mechanism through radial rotor subassembly ring around, two axial rotor subassemblies set up respectively in stator mechanism along stator mechanism axial direction's both sides for each rotor subassembly of motor shares same stator mechanism, adopt every rotor to compare rather than corresponding stator mode alone with prior art, utilize a stator mechanism just can realize matcing with three rotor subassembly, when guaranteeing torque density, alleviate whole disk motor weight, satisfy lightweight demand. The magnetizing direction of the radial rotor assembly is arranged along the radial direction of the stator mechanism, and the magnetizing direction of the axial rotor assembly is arranged along the axial direction of the stator mechanism.

The invention also provides a two-wheeled electric vehicle which comprises the disc type motor, can meet the requirements of improving the torque density and the whole light weight, and improves the riding experience of a user by reducing the unsprung mass of the whole vehicle and improving the driving range of the whole vehicle.

Drawings

Fig. 1 is a schematic structural view of a disc motor of the present invention;

FIG. 2 is an exploded schematic view of the disc motor of the present invention;

fig. 3 is a sectional view of the disc motor of the present invention;

FIG. 4 is a schematic view of the disc motor of the present invention showing a stator mechanism;

fig. 5 is a schematic structural diagram of a stator punching sheet in the disc motor of the present invention.

In the figure:

1. a stator mechanism; 2. a rotor mechanism; 3. a motor shaft;

11. a stator core; 111. stator punching sheets; 1111. a stator slot; 12. a winding framework; 13. a winding coil; 14. stator teeth;

21. a radial rotor assembly; 22. an axial rotor assembly; 23. a rotor side cover;

211. a rim; 212. a radial rotor core; 213. radial magnetic steel;

221. an axial rotor core; 222. axial magnetic steel.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

The present embodiment provides a disc motor, as shown in fig. 1-2, the disc motor includes a motor shaft 3, a stator mechanism 1 and a rotor mechanism 2, the stator mechanism 1 is sleeved on the motor shaft 3, the rotor mechanism 2 is disposed outside the stator mechanism 1, the stator mechanism 1 and the rotor mechanism 2 are mutually matched, and under the action of the magnetic field on the current, a magnetoelectric power rotating torque is formed, so that the motor shaft 3 rotates, and the process of converting electric energy into mechanical energy is realized.

In order to solve the problem that the torque density of the motor is relatively low because the stators and the rotors of the existing motor are arranged in a one-to-one correspondence manner, as shown in fig. 2, the rotor mechanism 2 includes a radial rotor assembly 21 and two axial rotor assemblies 22, and the two axial rotor assemblies 22 are respectively connected to the radial rotor assembly 21 to form an integral structure. The outer circle surface of stator mechanism 1 is located to radial rotor subassembly 21 ring, and radial rotor subassembly 21's the direction of magnetizing sets up along stator mechanism 1's radial direction, and two axial rotor subassemblies 22 set up respectively in stator mechanism 1 along stator mechanism 1 axial direction's both sides, and axial rotor subassembly 22's the direction of magnetizing sets up along stator mechanism 1's axial direction.

The disc motor provided by the embodiment forms a three-rotor structure by arranging the radial rotor assembly 21 and the two axial rotor assemblies 22, so that the disc motor can provide larger torque under the same volume, and the torque density of the motor is improved. Locate stator mechanism 1 through radial rotor subassembly 21 ring around, two axial rotor subassemblies 22 set up respectively in stator mechanism 1 along stator mechanism 1 axial direction's both sides, make each rotor subassembly of motor share same stator mechanism 1, adopt every rotor to compare rather than corresponding stator mode alone with prior art, utilize a stator mechanism 1 just can realize matcing with three rotor subassembly, when guaranteeing torque density, alleviate whole disc motor weight, satisfy lightweight demand. The magnetizing direction of the radial rotor assembly 21 is arranged along the radial direction of the stator mechanism 1, and the magnetizing direction of the axial rotor assembly 22 is arranged along the axial direction of the stator mechanism 1.

Further, as shown in fig. 2-3, the radial rotor assembly 21 includes a rim 211, a radial rotor core 212, and a plurality of radial magnetic steels 213, where the rim 211 is of an annular structure, the radial rotor core 212 is of an annular structure, an outer wall of the radial rotor core 212 is disposed in the rim 211 and attached to an inner wall of the rim 211, and the rim 211 and the radial rotor core 212 are preferably connected by welding. The inner wall of the radial rotor core 212 is sleeved outside the stator mechanism 1, and the plurality of radial magnetic steels 213 are uniformly arranged along the circumferential direction of the stator mechanism 1 and are arranged between the inner wall of the radial rotor core 212 and the stator mechanism 1. Preferably, a plurality of radial magnetic steels 213 are adhered to the inner wall of radial rotor core 212, and radial magnetic steels 213 are magnetized in the radial direction of stator mechanism 1. With this arrangement, the magnetizing effect of the outer peripheral surface of the stator mechanism 1 is ensured to achieve the purpose of improving the torque density.

Specifically, the number of the radial magnetic steels 213 is thirty, and the magnetic poles of two adjacent radial magnetic steels 213 are opposite, that is, fifteen radial magnetic steels 213 are N-pole radial magnetic steels, fifteen radial magnetic steels 213 are S-pole radial magnetic steels, and the N-pole radial magnetic steels and the S-pole radial magnetic steels are arranged at intervals to ensure the reliability and stability of the magnetization along the radial direction of the stator mechanism 1.

Further, each axial rotor assembly 22 includes an axial rotor core 221, a plurality of axial magnetic steels 222, the axial rotor core 221 is connected to the radial rotor core 212, and the axial rotor core 221 is preferably connected to the radial rotor core 212 through a connecting member, so as to ensure stability of the overall structure. A plurality of axial magnetic steels 222 are arranged inside the axial rotor core 221, and the plurality of axial magnetic steels 222 are uniformly arranged along the circumferential direction of the stator mechanism 1, so that the magnetizing effect of the side surface of the stator mechanism 1 is ensured, and the purpose of improving the torque density is achieved. Because the two axial rotor assemblies 22 are respectively arranged on two sides of the stator mechanism 1 along the axial direction of the stator mechanism 1, two side surfaces of the stator mechanism 1 can obtain good magnetizing effect.

Specifically, the number of the axial magnetic steels 222 is sixty, the sixty axial magnetic steels 222 are divided into two groups and are respectively adhered to the axial rotor core 221, each group of thirty axial magnetic steels 222 are uniformly arranged, the magnetic poles of two adjacent axial magnetic steels 222 are opposite, that is, fifteen axial magnetic steels 222 are N-pole axial magnetic steels, fifteen axial magnetic steels 222 are S-pole axial magnetic steels, and the N-pole axial magnetic steels and the S-pole axial magnetic steels are arranged at intervals to ensure the reliability and stability of magnetization along the axial direction of the stator mechanism 1.

Therefore, a group of radial rotor iron cores and radial side magnetic steels, and a group of axial rotor iron cores and radial side magnetic steels form three rotors of the rotor mechanism 2, and a magnetic circuit structure of the three rotors is adopted, so that the disc type motor provides larger torque under the same volume, and the purpose of improving the torque density of the motor is achieved.

Preferably, the number of the axial magnetic steels 222 is the same as that of the radial magnetic steels 213, and one radial magnetic steel 213 and two axial magnetic steels 222 respectively symmetrically arranged on two sides of the radial magnetic steel 213 along the axial direction of the stator mechanism 1 form a magnetic pole, and the magnetizing direction of the magnetic pole faces to or is far away from the stator mechanism 1. The three magnetic steels of each magnetic pole are aligned along the center of the stator mechanism 1, the structure is neat, and the magnetizing effect is good. It will be appreciated that the two axial magnets 222 in each pole are oppositely poled to ensure a preferred magnetic field strength.

Further, rotor mechanism 2 still includes rotor side cover 23, and the quantity of rotor side cover 23 is two, and rotor side cover 23 passes through the mounting to be installed on radial rotor core 212, and the mounting specifically is the bolt, adopts bolted connection's mode, simple structure, installation and dismantlement convenience. The two rotor side covers 23 are respectively arranged on two sides of the stator mechanism 1 along the axial direction of the stator mechanism 1, and the two rotor side covers 23 and the radial rotor iron core 212 form an accommodating cavity which is used for accommodating the stator mechanism 1 and the rotor mechanism 2 except the radial rotor iron core 212. The rotor side cover 23 is arranged on the outer side of the stator mechanism 1, so that the protection effect is achieved, and the damage to the rotor side cover caused by external acting force is avoided.

Further, as shown in fig. 4, the stator mechanism 1 includes a plurality of stator assemblies, which are spliced to form an annular structure. The number of the stator assemblies is preferably three, the stator assemblies are of a fan-shaped structure with a central angle of 120 degrees, the mode of splicing the plurality of stator assemblies is adopted, the installation and the disassembly are convenient, and the installation and maintenance production cost is reduced.

Preferably, as shown in fig. 4 to 5, each stator assembly includes a stator core 11, a winding frame 12, a winding coil 13, and stator teeth 14, a stator slot 1111 is disposed on the stator core 11, the winding frame 12 is disposed in the stator slot 1111, the stator slot 1111 provides an installation space for the winding frame 12, the winding coil 13 is wound on the winding frame 12, and the winding frame 12 plays a role of supporting the winding coil 13. Stator teeth 14 are provided on the side of stator core 11 and connected to motor shaft 3. Be provided with the riveting hole on stator tooth 14, be provided with the connecting hole corresponding the riveting hole on stator core 11, riveting hole and connecting hole are worn to locate respectively by the rivet to guarantee stator tooth 14's fixed effect.

The winding coil 13 is wound on the yoke portion of the stator core 11, not the tooth portion of the stator core 11, and the winding coil 13 is perpendicular to the magnetizing directions of the radial magnetic steel 213 and the axial magnetic steel 222. This embodiment adopts the enameled wire coiling at the mode of 11 yokes of stator core, improves the utilization ratio of 11 yokes of stator core magnetic circuits, compares traditional disk motor, and stator weight is lighter.

It can be understood that the number of the stator slots 1111 and the number of the stator teeth 14 are both multiple, the number of the stator teeth 14 of each stator assembly in this embodiment is specifically twelve, the twenty-four stator teeth 14 of the entire stator mechanism 1 are divided into two groups, and the two groups are respectively disposed on two sides of the stator core 11.

Further, stator core 11 includes a plurality of stator punching sheets 111, and a plurality of stator punching sheets 111 are just to and stack the setting, form stator core 11, and monomer structure's stator punching sheet 111, light in weight adopts the punching press to form, and production simple process, low in production cost.

The embodiment also provides a two-wheeled electric vehicle, including above-mentioned disk motor, can compromise simultaneously and improve torque density and the whole lightweight demand, through reducing whole unsprung mass, improving whole car driving range, improve user's the experience of riding.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A disc motor comprising a motor shaft (3), characterized in that it further comprises:

the stator mechanism (1) is sleeved on the motor shaft (3);

rotor mechanism (2), rotor mechanism (2) including radial rotor subassembly (21) and two connect respectively in the axial rotor subassembly (22) of radial rotor subassembly (21), radial rotor subassembly (21) encircle to be located the excircle surface of stator mechanism (1), the direction of magnetizing of radial rotor subassembly (21) is followed the radial direction setting of stator mechanism (1), two axial rotor subassembly (22) set up respectively in stator mechanism (1) is followed the both sides of stator mechanism (1) axial direction, the direction of magnetizing of axial rotor subassembly (22) is followed the axial direction setting of stator mechanism (1).

2. The disc motor according to claim 1, wherein the radial rotor assembly (21) includes a rim (211), a radial rotor core (212), and a plurality of radial magnetic steels (213), the radial rotor core (212) is an annular structure, an outer wall of the radial rotor core (212) is disposed in the rim (211) and attached to an inner wall of the rim (211), the inner wall of the radial rotor core (212) is sleeved outside the stator mechanism (1), and the plurality of radial magnetic steels (213) are uniformly disposed along a circumferential direction of the stator mechanism (1) and disposed between the inner wall of the radial rotor core (212) and the stator mechanism (1).

3. A disc motor according to claim 2, wherein the poles of two adjacent radial magnetic steels (213) are opposite.

4. The disc motor according to claim 2, wherein each axial rotor assembly (22) comprises an axial rotor core (221), a plurality of axial magnetic steels (222), the axial rotor core (221) being connected to the radial rotor core (212), a plurality of axial magnetic steels (222) being arranged inside the axial rotor core (221), the plurality of axial magnetic steels (222) being uniformly arranged in a circumferential direction of the stator mechanism (1).

5. A disc motor according to claim 4, wherein the poles of two adjacent axial magnets (222) are opposite.

6. The disc motor according to claim 4, wherein the number of the axial magnetic steels (222) is the same as the number of the radial magnetic steels (213), and one radial magnetic steel (213) and two axial magnetic steels (222) symmetrically arranged on two sides of the radial magnetic steel (213) along the axial direction of the stator mechanism (1) respectively form a magnetic pole, and the magnetizing direction of the magnetic pole faces to or is away from the stator mechanism (1).

7. A disc motor according to claim 1, characterized in that the stator mechanism (1) comprises a plurality of stator components which are spliced to form an annular structure.

8. The disc motor of claim 7, wherein each of the stator assemblies comprises:

a stator core (11), wherein a stator slot (1111) is provided on the stator core (11);

a winding skeleton (12) disposed within the stator slots (1111);

a winding coil (13) wound around the winding frame (12);

stator teeth (14) provided on a side surface of the stator core (11) and connected to the motor shaft (3).

9. The disc motor according to claim 8, wherein the stator core (11) includes a plurality of stator lamination pieces (111) arranged in a stacked manner.

10. A two-wheeled electric vehicle comprising the disc motor according to any one of claims 1 to 9.