CN214205110U

CN214205110U - Axial flux hub motor

Info

Publication number: CN214205110U
Application number: CN202120064851.8U
Authority: CN
Inventors: 王加许; 唐敏; 王健; 丁伟
Original assignee: Jinyuxing Electromechanical Technology Zhejiang Co ltd
Current assignee: Jinyuxing Electromechanical Technology Zhejiang Co ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-09-14
Anticipated expiration: 2031-01-11

Abstract

The utility model relates to an axial magnetic flux in-wheel motor, including wheel hub, rotor, stator and center pin, the center pin passes wheel hub, rotor and stator, the stator with center pin fixed connection, rotor and wheel hub can round the center pin is rotatory, the rotor includes a plurality of magnet steel, the stator includes locating plate and a plurality of stator core, stator core is located on the locating plate, the winding has the winding on the stator core. The positioning plate is provided with a mounting opening, and one end of the stator core is positioned in the mounting opening. Compared with the prior art, the utility model is provided with a plurality of stator cores, has better magnetic conductivity and good ventilation and cooling effects; and each stator core is independently arranged on the positioning plate, so that the stator core is convenient to disassemble and maintain, and the maintenance cost is reduced.

Description

Axial flux hub motor

Technical Field

The utility model relates to an axial magnetic flux in-wheel motor belongs to in-wheel motor technical field.

Background

The hub motor is used as a core component in the electric vehicle, and the working performance of the hub motor directly influences the performance of the electric vehicle. Most of electric vehicle hub motors adopt a traditional radial magnetic field outer rotor structure, and the requirement of an electric vehicle on the endurance mileage is difficult to meet.

Various improvements have been made to solve the above problems, and patents have been filed, for example, chinese patent literature discloses a spindle-free axial flux hub motor [ application number: 202010002588. X; application publication No.: CN111009996A ], comprising a hub, a rotor, a stator and a central shaft, wherein the stator comprises a stator bracket and a stator disc fixedly connected outside the stator bracket, and the stator disc is formed by winding through pouring sealant and encapsulation. The hub motor with the structure cancels the stator core, the winding is molded by pouring and sealing glue, the magnetic conductivity is poor, the equivalent air gap length of the motor is increased, and compared with an iron core motor under the same condition, the using amount of the permanent magnet material is increased, and the cost is higher.

In the existing axial flux hub motor with the iron core, the stator iron core and the positioning plate are usually integrally formed, and winding is troublesome; and when the maintenance, need dismantle and change whole stator part, overhaul with the degree of difficulty of maintaining high, cost of maintenance is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the shortcoming of prior art, provide a magnetic conductivity better, dismantle the more convenient axial magnetic flow in-wheel motor of maintenance.

For realizing the purpose the utility model adopts the technical proposal that:

the utility model provides an axial magnetic flux in-wheel motor, includes wheel hub, rotor, stator and center pin, the center pin passes wheel hub, rotor and stator, the stator with center pin fixed connection, rotor and wheel hub can round the center pin is rotatory, the rotor includes a plurality of pieces of magnet steel, the stator includes locating plate and a plurality of stator core, stator core is located on the locating plate, the winding has the winding on the stator core.

As a further optimization of the above technical solution: the positioning plate is provided with a mounting opening, and one end of the stator core is positioned in the mounting opening.

As a further optimization of the above technical solution: stator core includes installation department, magnetic conduction portion and connection the installation department with the connecting portion of magnetic conduction portion, the winding is in on the connecting portion, the installation department with form the location step between the connecting portion, the installation department is located in the installation mouth, the location step with a side of locating plate is hugged closely.

As a further optimization of the above technical solution: the both ends of installation department are equipped with the lug, the both ends system of installing port has the draw-in groove, the lug is located in the draw-in groove.

As a further optimization of the above technical solution: the magnetic conduction portion is close to one side face of the rotor is provided with an auxiliary groove and a sensor mounting groove, the auxiliary groove is communicated with the sensor mounting groove, and a position sensor is mounted in the sensor mounting groove.

As a further optimization of the above technical solution: the two end covers are respectively fixedly covered on the opening parts on the two sides of the hub so as to form an accommodating cavity together with the hub, the stator and the rotor are arranged in the accommodating cavity, the two ends of the central shaft penetrate through the two end covers, and the end covers can rotate around the central shaft.

As a further optimization of the above technical solution: the magnetic steel is fixed on one of the end covers.

As a further optimization of the above technical solution: and a bearing and an oil seal matched with the end cover are sleeved on the central shaft.

As a further optimization of the above technical solution: the central shaft is connected with the positioning plate through a flat key.

Compared with the prior art, the utility model is provided with a plurality of stator cores, has better magnetic conductivity and good ventilation and cooling effects; and each stator core is independently arranged on the positioning plate, so that the stator core is convenient to disassemble and maintain, and the maintenance cost is reduced.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic diagram of the explosion structure of the present invention.

Fig. 3 is a schematic perspective view of a middle part of the structure of the present invention.

Fig. 4 is a schematic perspective view of the stator core of the present invention.

Fig. 5 is a schematic structural view of the middle positioning plate of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description. As shown in fig. 1 to 5, an axial flux hub motor includes a hub 1, a rotor 2, a stator 3 and a central shaft 4, wherein the central shaft 4 passes through the hub 1, the rotor 2 and the stator 3, the stator 3 is fixedly connected with the central shaft 4, and the rotor 2 and the hub 1 can rotate around the central shaft 4. Rotor 2 includes a plurality of pieces of magnet steel 21, stator 3 includes stator core 31 and locating plate 32, stator core 31 is located on the locating plate 32, the winding 33 has been twined on the stator core 31. The stator core is made of common silicon steel sheets, and a plurality of silicon steel sheets are laminated to form the stator core. The silicon steel sheet laminating direction is vertical to the axial direction. The stator core has the advantages of good magnetic conductivity, good ventilation and cooling effects and the like.

In the above technical scheme: the stator core 31 includes a mounting portion 311, a magnetic conductive portion 312, and a connecting portion 313 connecting the mounting portion 311 and the magnetic conductive portion 312, and the winding 33 is wound around the connecting portion 313. As shown in fig. 4, a positioning step 314 is formed between the mounting portion 311 and the connecting portion 313, and two ends of the mounting portion 311 are provided with protrusions 315. As shown in fig. 5, the positioning plate 32 is formed with a plurality of mounting holes 321, and two ends of the mounting holes 321 are formed with slots 322. The mounting portion 311 is located in the mounting opening 321, the protrusion 315 is located in the slot 322, and the positioning step 314 is tightly attached to a side surface of the positioning plate 32. In this embodiment, the mounting opening 321 is a mounting hole, and in actual production, the mounting opening 321 may also be a mounting groove. The installation mode of the stator core 31 enables each stator core 31 to be independently installed on the positioning plate 32, and other fasteners are not needed for installation, so that the stator core is convenient to detach and maintain.

In the above technical scheme: as shown in fig. 4, an auxiliary groove 316 and a sensor mounting groove 317 are formed on a side surface of the magnetic conductive part 312 near the rotor 2, and the auxiliary groove 316 is communicated with the sensor mounting groove 317. A position sensor 6 is installed in the sensor installation groove 317. The position sensor 6 is directly mounted on the stator core 31, and no additional part for mounting the position sensor 6 is required to be arranged on the central shaft 4, so that the number of parts is small, and the mounting is convenient. And position sensor 6 direct detection magnet steel 21, the correct position of response rotor 2 through magnet steel 21 avoids the detection precision that the position deviation that exists between external position sensor 6 and the magnet steel 21 leads to reduce, improves and detects the precision. In this embodiment, the position sensor 6 is a sensor, such as a hall sensor, and in actual production, the position sensor 6 may be an encoder. The auxiliary groove 316 is arranged to reduce cogging torque, the cogging torque is torque generated by interaction between the magnetic steel 21 and the stator core 31 when the winding 33 is not electrified, the cogging torque can cause the motor to generate vibration and noise, the rotating speed is fluctuated, the motor cannot run stably, the performance of the motor is influenced, and the auxiliary groove 316 reduces the cogging torque, so that the use comfort and the use stability of the electric vehicle are improved.

In the above technical scheme: as shown in fig. 1 and 2, the hub further includes two end covers 5, the two end covers 5 are respectively and fixedly covered at the openings on the two sides of the hub 1, so as to form an accommodating cavity together with the hub 1, and the stator 3 and the rotor 2 are both arranged in the accommodating cavity. A plurality of magnet steel 21 are along the fixed medial surface that sets up in one of them end cover 5 of circumference, need not additionally to set up the spare part that is used for installing magnet steel 21 on center pin 4, spare part is few, simple to operate. The central shaft 4 is passed through two end caps 5 at both ends and the end caps 5 are rotatable about the central shaft 4.

In the above technical scheme: as shown in fig. 2, a bearing 7 and an oil seal 8 which are matched with the end cover 5 are sleeved on the central shaft 4, that is, two bearings 7 and two oil seals 8 are arranged. The bearing 7 guides the rotation of the end cap 5, and the oil seal 8 prevents the leakage of the lubricant oil in the motor.

In the above technical scheme: the central shaft 4 is connected with the positioning plate 32 through a flat key, so that the positioning plate 32 is prevented from rotating relative to the central shaft 4, and the disassembly is convenient.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, all should fall into the protection scope of the utility model, the technical scheme that the design of this technical field technical personnel according to the utility model can be obtained through logic analysis, reasoning or limited experiment on prior art's basis, all should fall into.

Claims

1. An axial flux hub motor comprises a hub (1), a rotor (2), a stator (3) and a central shaft (4), wherein the central shaft (4) penetrates through the hub (1), the rotor (2) and the stator (3), the stator (3) is fixedly connected with the central shaft (4), the rotor (2) and the hub (1) can rotate around the central shaft (4), the axial flux hub motor is characterized in that the rotor (2) comprises a plurality of pieces of magnetic steel (21), the stator (3) comprises a positioning plate (32) and a plurality of stator cores (31), the stator cores (31) are positioned on the positioning plate (32), and windings (33) are wound on the stator cores (31);

and a mounting opening (321) is formed in the positioning plate (32), and one end of the stator core (31) is positioned in the mounting opening (321).

2. The axial flux in-wheel motor of claim 1, wherein the stator core (31) comprises a mounting portion (311), a magnetic conductive portion (312), and a connecting portion (313) connecting the mounting portion (311) and the magnetic conductive portion (312), the winding (33) is wound around the connecting portion (313), a positioning step (314) is formed between the mounting portion (311) and the connecting portion (313), the mounting portion (311) is located in the mounting opening (321), and the positioning step (314) is tightly attached to one side of the positioning plate (32).

3. An axial flux in-wheel motor according to claim 2, wherein the two ends of the mounting portion (311) are provided with protrusions (315), the two ends of the mounting opening (321) are provided with clamping grooves (322), and the protrusions (315) are located in the clamping grooves (322).

4. An axial flux in-wheel motor according to claim 2, wherein a side of said magnetic conductive part (312) near said rotor (2) is formed with an auxiliary groove (316) and a sensor mounting groove (317), said auxiliary groove (316) is connected to said sensor mounting groove (317), and said sensor mounting groove (317) is mounted with a position sensor (6).

5. The axial flux hub motor of claim 1, further comprising two end covers (5), wherein the two end covers (5) are respectively fixed and arranged at openings at two sides of the hub (1) to form a containing cavity together with the hub (1), the stator (3) and the rotor (2) are arranged in the containing cavity, two ends of the central shaft (4) penetrate through the two end covers (5), and the end covers (5) can rotate around the central shaft (4).

6. An axial flux in-wheel motor according to claim 5, characterized in that said magnetic steel (21) is fixed to one of said end covers (5).

7. An axial flux in-wheel motor according to claim 5, characterized in that the central shaft (4) is sleeved with a bearing (7) and an oil seal (8) which are matched with the end cover (5).

8. An axial flux in-wheel motor according to claim 1, characterized in that the central shaft (4) and the positioning plate (32) are connected by a flat key.