CN223391163U - Motor rotor structure and drive motor - Google Patents

Abstract

The application relates to a motor rotor structure and a driving motor, and relates to the technical field of driving devices. The utility model provides a motor rotor structure, its includes rotor body and a plurality of first magnet, and rotor body has seted up a plurality of first fixed slots along radial, and first fixed slot sets up along the even interval of circumference of rotor body, and first magnet one-to-one card is located in the fixed slot, is provided with first magnetism isolating bridge between two adjacent first fixed slots, and first magnetism isolating bridge is located the one end that first fixed slot is close to rotor body central axis. The first magnet of the motor rotor structure provided by the application is radially arranged along the rotor body section, so that the utilization rate of the first magnet is improved, the dosage of the magnet is reduced, and the cost is reduced. Meanwhile, one end of the first fixed groove, which is close to the center of the rotor body, is provided with a first magnetism isolating bridge, the structure of the rotor body is optimized by fully utilizing space, the utilization rate of the permanent magnet is guaranteed, and the performance and the efficiency of the motor are further improved.

Description

Motor rotor structure and driving motor

Technical Field

The application relates to the technical field of driving devices, in particular to a motor rotor structure and a driving motor.

Background

The permanent magnet motor uses permanent magnets to provide excitation, so that the motor structure is simpler, the processing and assembly cost is reduced, and the motor is a common driving device on equipment such as three-wheeled electric vehicles, new energy automobiles and the like. The permanent magnet motor is mainly composed of a stator, a rotor, an end cover and other parts, wherein the rotor for fixing the permanent magnet is an important component part of the permanent magnet motor.

The existing three-wheel electric vehicle inner rotor motor generally adopts a built-in rectangular magnetic steel V-shaped arrangement mode, and the mode has small reluctance torque and magnetic flux, so that the magnetic steel consumption is large, and the cost is high. Therefore, improvements to existing rotor structures and arrangements of magnetic steels are needed.

Disclosure of utility model

The application aims to provide a motor rotor structure and a driving motor so as to solve the technical problems.

The embodiment of the utility model provides a motor rotor structure which comprises a rotor body and a plurality of first magnets, wherein the rotor body is provided with a plurality of first fixing grooves along the radial direction, the first fixing grooves are uniformly arranged at intervals along the circumferential direction of the rotor body, the first magnets are clamped in the fixing grooves in a one-to-one correspondence manner, a first magnetism isolating bridge is arranged between two adjacent first fixing grooves, and the first magnetism isolating bridge is positioned at one end of the first fixing groove close to the central axis of the rotor body.

Further, a spacing groove is formed in one end, close to the radial inner side of the rotor body, of the first fixing groove, and the first magnetism isolating bridge is located between two adjacent spacing grooves.

Further, the number of the spacing grooves is two, and the two spacing grooves are symmetrically arranged on two sides of the first fixing groove respectively.

Further, the extending direction of the spacing groove is inclined relative to the radial direction of the first fixing groove, and if the included angle between the spacing groove and the first fixing groove is alpha, 35 degrees < alpha <45 degrees.

Further, the first fixing groove comprises a plurality of sections of groove bodies which are sequentially arranged along the radial direction of the rotor body, two adjacent sections of groove bodies are separated, and a first magnet is arranged in each groove body.

Further, a plurality of second fixing grooves are formed in the peripheral wall of the rotor body at intervals, the second fixing grooves are respectively formed between two adjacent first fixing grooves, and second magnets are arranged in the second fixing grooves.

Further, one end of the first fixed groove, which is close to the second fixed groove, is provided with a second magnetism isolating bridge.

Further, the first magnet and the second magnet comprise one or more of rectangular magnetic steel and arc magnetic steel.

Further, one end of the first fixing groove, which is close to the first magnetism isolating bridge, is provided with a limiting protrusion, and the limiting protrusion is in propping limit with the first magnet.

On the other hand, the embodiment of the utility model also provides a driving motor, which comprises a shell, a stator and a motor rotor structure of any one of the above, wherein the stator and the motor rotor structure are arranged in the shell.

According to the motor rotor structure provided by the utility model, the rotor body is provided with the first fixing grooves at uniform intervals along the radial direction, and the first magnets are arranged in the first fixing grooves. The first magnet is radially arranged along the rotor body section, so that the utilization rate of the first magnet is improved, the dosage of the magnet is reduced, and the cost is reduced. Meanwhile, one end of the first fixed groove, which is close to the center of the rotor body, is provided with a first magnetism isolating bridge, the structure of the rotor body is optimized by fully utilizing space, the utilization rate of the permanent magnet is guaranteed, and the performance and the efficiency of the motor are further improved.

Additional features and advantages of the application will be set forth in the detailed description which follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of a rotor body according to an embodiment of the present application;

Fig. 2 is a perspective view of a rotor body according to an embodiment of the present application;

FIG. 3 is a second front view of the rotor body according to the embodiment of the present application;

FIG. 4 is a front view of a third embodiment of a rotor body;

FIG. 5 is a front view of a rotor body according to an embodiment of the present application;

Fig. 6 is an enlarged view of area a in fig. 5 according to an embodiment of the present application.

The icons are 100-rotor body, 200-first magnet, 101-first fixed slot, 102-first magnetism isolating bridge, 103-interval slot, 104-second fixed slot, 300-second magnet, 105-second magnetism isolating bridge and 106-limit protrusion.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put in use of the product of this application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, or may be directly connected, or may be indirectly connected through an intermediate medium, or may be in communication with the inside of two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 and 2, the present embodiment provides a motor rotor structure, which includes a rotor body 100 and a plurality of first magnets 200, wherein the rotor body 100 is radially provided with a plurality of first fixing slots 101, the first fixing slots 101 are spaced along a circumference Xiang Junyun of the rotor body 100, the first magnets 200 are clamped in the fixing slots in a one-to-one correspondence manner, a first magnetic isolation bridge 102 is disposed between two adjacent first fixing slots 101, and the first magnetic isolation bridge 102 is located at one end of the first fixing slot 101 close to a central axis of the rotor body 100.

In the present embodiment, the rotor body 100 may be manufactured by integral molding, or may be manufactured by lamination of punching sheets. The rotor body 100 is of a cylindrical structure as a whole, and the rotor body 100 is provided with a plurality of first fixing grooves 101 along the radial direction, and each first fixing groove 101 is provided with a first magnet 200. The plurality of first magnets 200 are circumferentially and uniformly spaced on the rotor body 100, so that the first magnets 200 have a spoke-like structure. The first magnets 200 are distributed in a spoke-shaped structure, so that the end parts of the first magnets 200 are opposite to the coils on the stator, the magnetic flux acting between the first magnets 200 and the stator is improved, the torque of the rotor body 100 is increased, and the normal operation of the rotor can be satisfied even if the size of the first magnets 200 is reduced. Compared with the existing rectangular magnetic steel V-shaped arrangement mode, the spoke-shaped arrangement mode is adopted in the embodiment to greatly improve the reluctance torque of the motor, so that the purpose of reducing the magnetic steel consumption is achieved, the utilization rate of the magnetic steel of the motor is improved, and the cost of the motor is reduced. Meanwhile, in order to prevent the leakage coefficient of the permanent magnet from being too large and the utilization rate of the permanent magnet from being too low, a first magnetism isolating bridge 102 is arranged between two adjacent first fixing grooves 101, and the first magnetism isolating bridge 102 is located at one end of the first fixing groove 101 close to the central axis of the rotor body 100. It will be appreciated that the first magnets 200 are distributed in a spoke shape, the closer to the central axis of the rotor body 100, the smaller the distance between the first magnets 200. In order to improve the utilization rate of the permanent magnet, a magnetism isolating bridge is arranged between the first magnets 200 to increase the utilization rate of the magnets, so that the use effect of the first magnets 200 is ensured.

In some possible embodiments, the first fixing groove 101 is provided with a spacing groove 103 near an end of the radially inner side of the rotor body 100, and the first magnetism isolating bridge 102 is located between two adjacent spacing grooves 103.

Referring to fig. 1, a first fixing slot 101 is provided with a spacing slot 103 at one end near the center of the rotor body 100, and the spacing slots 103 are provided at two sides of the first fixing slot 101. Because the first fixing grooves 101 are distributed in spoke-like manner, the closer to the center of the rotor body 100 is, the smaller the distance between two adjacent first fixing grooves 101 is, at this time, the two sides of the first fixing groove 101 are provided with the spacing grooves 103, and a narrower magnetic isolation bridge structure is formed between the two first fixing grooves 101, so that the magnetic flux at the position is saturated to play a role in limiting magnetic leakage. The spacing grooves 103 are matched with the spoke-shaped arranged first fixing grooves 101, so that the space is fully optimized, the first magnetism isolating bridge 102 is formed by utilizing the characteristic that the distance between two adjacent first fixing grooves 101 is smaller at the position closer to the center of the rotor body 100, the utilization rate of the first magnet 200 is ensured, the supporting strength of the rotor body 100 is not influenced too much, and the use effect and the service life of the rotor body 100 are ensured.

In some possible embodiments, the number of the spacing grooves 103 is two, and the two spacing grooves 103 are symmetrically disposed on two sides of the first fixing groove 101.

Referring to fig. 1, the number of the spacing grooves 103 is two, and the two spacing grooves 103 are symmetrically distributed on two sides of the first fixing groove 101, so that a first magnetic isolation bridge 102 structure can be formed between any first fixing groove 101 and the first fixing grooves 101 on two sides.

In some possible embodiments, the extending direction of the spacing groove 103 is inclined relative to the radial direction to which the first fixing groove 101 belongs, and if the included angle between the spacing groove 103 and the first fixing groove 101 is α, 35 ° < α <45 °.

Referring to fig. 1, two sides of the first fixing slot 101 are respectively provided with inclined spacing slots 103 at one end near the center of the rotor body 100, and a dovetail-shaped magnetic isolation bridge structure is formed between the spacing slots 103 at two sides, so that the magnetic isolation effect is ensured and the influence on the supporting strength of the rotor body 100 due to the arrangement of the spacing slots 103 is avoided. The spacing groove 103 is communicated with the first fixing groove 101, and an included angle is formed between the spacing groove 103 and the first fixing groove 101. The angle between the spacing groove 103 and the first fixed groove 101 is read as 35 ° to 45 °. It can be appreciated that when the included angle between the spacing groove 103 and the first fixing groove 101 is too small, a narrower magnetic isolation bridge structure cannot be formed between the two first fixing grooves 101, so that the effects of magnetic isolation and improvement of the magnet utilization rate cannot be achieved. Conversely, when the included angle between the spacing groove 103 and the first fixing groove 101 is too large, the connecting material between two adjacent first fixing grooves 101 is reduced, which affects the strong support and the service life of the whole rotor body 100. Therefore, the included angle between the spacing groove 103 and the first fixing groove 101 is preferably set to 40 °, so that a magnetic isolation bridge structure can be formed, the utilization rate of the magnet is ensured, and the supporting strength of the rotor body 100 is not affected.

In some possible embodiments, the first fixing groove 101 includes a plurality of sections of grooves sequentially arranged along the radial direction of the rotor body 100, two adjacent sections of grooves are spaced apart from each other, and a first magnet 200 is disposed in each groove.

Referring to fig. 3, the first fixing groove 101 is formed by sequentially arranging a plurality of sections of groove bodies, each groove body is provided with a first magnet 200, and the plurality of sections of magnets are combined to form the first magnet 200. The multi-stage first magnet 200 can be manufactured and installed separately, reducing manufacturing and installation difficulties. It should be noted that, in fig. 3, only a two-stage fixing groove structure is shown, and in some possible embodiments, the first fixing groove 101 may be configured as a 3-stage, 4-stage, or other multi-stage structure.

In some possible embodiments, a plurality of second fixing grooves 104 are spaced apart from each other on the peripheral wall of the rotor body 100, the second fixing grooves 104 are respectively formed between two adjacent first fixing grooves 101, and the second magnets 300 are disposed in the second fixing grooves 104.

Referring to fig. 4, a second fixing groove 104 is formed in the peripheral wall of the rotor body 100, and the second fixing groove 104 is located between two adjacent first fixing grooves 101, so as to increase magnetic flux at the mating position of the rotor body 100 and the stator, and improve the efficiency of the rotor. It will be appreciated that the further away the first fixing grooves 101 and the first magnets 200 are arranged in a spoke-like structure, the further the distance between the first fixing grooves 101 is from the center of the rotor body 100. At this time, the distance between two adjacent first magnets 200 may be too large due to the influence of the radius of the rotor and the width of the first magnets 200, which may affect the use effect of the rotor. At this time, the second magnet 300 may be added between two adjacent first magnets 200, thereby increasing magnetic flux at the mating position of the rotor and the stator, and ensuring the efficiency of the rotor. It should be noted that, the second magnet 300 may be fixed in the second fixing groove 104 by a bonding or a clamping method, and a specific connection method is not limited.

Referring to fig. 5 and 6, in some possible embodiments, a second magnetic isolation bridge 105 is disposed at an end of the first fixing groove 101 near the second fixing groove 104, so that the utilization ratio of the first magnet 200 and the second magnet 300 is further improved by reducing the material between the first fixing groove 101 and the second fixing groove 104, thereby forming a narrow magnetic isolation bridge structure.

In some possible embodiments, a limiting protrusion 106 is disposed at an end of the first fixing groove 101 near the first magnetism isolating bridge 102, and the limiting protrusion 106 abuts against the first magnet 200.

Referring to fig. 1, a limiting protrusion 106 is disposed at one end of the first fixing groove 101 near the center of the rotor body 100, and the width of the limiting protrusion 106 is smaller than that of the first fixing groove 101. The spacing protruding 106 and the one end butt of first magnet 200, the other end butt of first magnet 200 and the inside wall butt of fixed slot simultaneously to play the effect of fixed first magnet 200, need not to adopt other device auxiliary fixation during the installation, easy dismounting. The first magnet 200 is installed in the first fixing groove 101 through the limiting protrusion 106, the contact area between the first magnet 200 and the limiting protrusion 106 is reduced, the limiting protrusion 106 also plays a role of a magnetism isolating bridge, and the utilization rate of the first magnet 200 is guaranteed.

In some possible embodiments, the first magnet 200 and the second magnet 300 comprise one or more of rectangular magnetic steel, arc magnetic steel.

The first magnet 200 and the second magnet 300 can be set to a square structure or a tile-shaped arc structure according to actual production requirements, and in order to ensure stability during installation, limit grooves can be formed in the first magnet 200 and the second magnet 300, and the limit grooves are matched with positioning protrusions on the rotor body 100 to play a role in limiting, so that stability and using effects of the first magnet 200 and the second magnet 300 are ensured. The first magnet 200 and the second magnet 300 are all made of permanent magnet steel, are common permanent magnets in the market, and have good corrosion resistance and long service life.

The utility model also provides a driving motor which comprises a shell, a stator and a motor rotor structure of any one of the above, wherein the stator and the motor rotor structure are arranged in the shell.

The driving motor provided by the embodiment adopts the motor rotor structure provided by the embodiment, the cost is low, and the utilization rate of the permanent magnet of the rotor is high, so that the efficiency and the use effect of the driving motor are improved.

It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a motor rotor structure, its characterized in that includes rotor body (100) and a plurality of first magnet (200), a plurality of first fixed slots (101) have been seted up along radial rotor body (100), just first fixed slot (101) are followed the even interval in circumference of rotor body (100) sets up, first magnet (200) one-to-one card is located in the fixed slot, adjacent two be provided with first magnetism isolating bridge (102) between first fixed slot (101), first magnetism isolating bridge (102) are located first fixed slot (101) are close to the one end of rotor body (100) central axis.

2. The motor rotor structure according to claim 1, characterized in that the first fixing groove (101) is provided with a spacing groove (103) near one end of the radial inner side of the rotor body (100), and the first magnetism isolating bridge (102) is located between two adjacent spacing grooves (103).

3. The motor rotor structure according to claim 2, wherein the number of the spacing grooves (103) is two, and the two spacing grooves (103) are symmetrically disposed on both sides of the first fixing groove (101), respectively.

4. A rotor structure of an electric machine according to claim 3, characterized in that the direction of extension of the spacer groove (103) is inclined with respect to the radial direction to which the first fixing groove (101) belongs, and that the angle α between the spacer groove (103) and the first fixing groove (101) is 35 ° < α <45 °.

5. The motor rotor structure according to claim 1, wherein the first fixing groove (101) includes a plurality of groove bodies sequentially arranged in a radial direction of the rotor body (100), adjacent two groove bodies are spaced apart from each other, and the first magnet (200) is provided in each groove body.

6. The motor rotor structure according to any one of claims 1-5, wherein a plurality of second fixing grooves (104) are formed in the peripheral wall of the rotor body (100) at intervals, the second fixing grooves (104) are respectively formed between two adjacent first fixing grooves (101), and second magnets (300) are arranged in the second fixing grooves (104).

7. The motor rotor structure according to claim 6, characterized in that the end of the first fixing groove (101) close to the second fixing groove (104) is provided with a second magnetism isolating bridge (105).

8. The electric machine rotor structure of claim 6, characterized in that the first magnet (200) and the second magnet (300) comprise one or more of rectangular magnetic steel, arc magnetic steel.

9. The motor rotor structure according to claim 1, wherein a limit protrusion (106) is provided at an end of the first fixing groove (101) near the first magnetism isolating bridge (102), and the limit protrusion (106) abuts against the first magnet (200) to limit.

10. A drive motor comprising a housing, a stator and a motor rotor structure according to any one of claims 1-9, both the stator and the motor rotor structure being disposed inside the housing.