CN220775485U

CN220775485U - Rotor structure and motor

Info

Publication number: CN220775485U
Application number: CN202322525670.2U
Authority: CN
Inventors: 周荣明; 曹阳; 刘振国
Original assignee: Nanjing Chervon Automobile Precision Technology Co ltd
Current assignee: Nanjing Chervon Automobile Precision Technology Co ltd
Priority date: 2023-09-18
Filing date: 2023-09-18
Publication date: 2024-04-12
Anticipated expiration: 2033-09-18

Abstract

The utility model relates to the technical field of motors, and particularly discloses a rotor structure and a motor, wherein the rotor structure comprises a rotor iron core, magnetic steel and magnetic isolation strips, the rotor iron core is formed by laminating a plurality of rotor punching sheets, a plurality of V-shaped magnetic steel grooves are arranged on the rotor iron core around the circumference of the rotor iron core, the openings of the V-shaped magnetic steel grooves face the outer peripheral surface of the rotor iron core, the plurality of magnetic isolation grooves are positioned between the V-shaped magnetic steel grooves and the outer peripheral surface of the rotor iron core, and each magnetic isolation groove is respectively opposite to the adjacent end parts of two adjacent V-shaped magnetic steel grooves; the plurality of magnetic steels are inserted into the plurality of V-shaped magnetic steel grooves in a one-to-one correspondence manner; the magnetism isolating strips are provided with a plurality of magnetism isolating strips, are inserted in the magnetism isolating grooves in a one-to-one correspondence manner and are abutted with the inner walls of the corresponding magnetism isolating grooves. The rotor core and the magnetism isolating strip are divided into two parts, the magnetism isolating groove is formed in the rotor core, the magnetism isolating strip is inserted into the magnetism isolating groove, on one hand, the magnetism isolating effect on the magnetic steel is achieved, and on the other hand, the integral strength of the rotor core is improved, so that the rotor core can be suitable for a motor rotating at a high speed.

Description

Rotor structure and motor

Technical Field

The utility model relates to the technical field of motors, in particular to a rotor structure and a motor.

Background

In recent years, due to the rapid development of new energy automobiles, the power density requirement on new energy driving motors is higher and higher, wherein a high-speed motor is an important development direction.

With the increase of the motor rotation speed, the strength of the rotor in the conventional structure is difficult to bear such a huge centrifugal force. In order to improve the strength of the rotor, as shown in fig. 1, it is currently common practice to insert permanent magnets into the integral rotor sheet to ensure the strength by increasing the thickness h1, h2 of the magnetic bridge. However, increasing the thickness of the magnetic bridge increases the leakage between the magnetic steels, resulting in a decrease in motor performance.

Therefore, a rotor structure is needed, which can increase the overall strength of the rotor while ensuring the performance of the motor.

Disclosure of Invention

The utility model aims at: the rotor structure and the motor are provided to solve the problem that the performance of the motor is reduced due to the fact that the strength of the rotor is guaranteed by increasing the thickness of the magnetic bridge, but the magnetic leakage between the magnetic steels is increased due to the fact that the thickness of the magnetic bridge is increased.

In one aspect, the present utility model provides a rotor structure comprising:

the rotor core is formed by laminating a plurality of rotor punching sheets, a plurality of V-shaped magnetic steel grooves are formed in the circumference of the rotor core, the openings of the V-shaped magnetic steel grooves face the outer circumferential surface of the rotor core, a plurality of magnetism isolating grooves are positioned between the V-shaped magnetic steel grooves and the outer circumferential surface of the rotor core, and each magnetism isolating groove is opposite to the adjacent end parts of two adjacent V-shaped magnetic steel grooves respectively;

the magnetic steels are arranged in a plurality of V-shaped magnetic steel grooves in a one-to-one correspondence manner;

the magnetic isolation strips are arranged in a plurality, are inserted in the magnetic isolation grooves in a one-to-one correspondence manner and are abutted against the inner walls of the corresponding magnetic isolation grooves.

As the preferable technical scheme of the rotor structure, the magnetism isolating groove is a groove concavely arranged on the outer peripheral surface of the rotor core.

As a preferred technical scheme of the rotor structure, the magnetism isolating grooves comprise first wedge-shaped grooves, and the first wedge-shaped grooves are opposite to adjacent ends of two adjacent V-shaped magnetic steel grooves;

the magnetic isolation strip comprises a first wedge-shaped plate, the first wedge-shaped plate is inserted into the first wedge-shaped groove, and the first wedge-shaped plate is clamped with the rotor core along the radial direction of the rotor core.

As a preferable technical scheme of the rotor structure, the magnetism isolating slot further comprises a second wedge-shaped slot, and the slot wall of the first wedge-shaped slot is concavely provided with the second wedge-shaped slot;

the magnetic isolation strip further comprises a second wedge-shaped plate fixedly connected with the first wedge-shaped plate, the first wedge-shaped plate is inserted into the first wedge-shaped groove, the second wedge-shaped plate is inserted into the second wedge-shaped groove, and the second wedge-shaped plate is clamped with the rotor core along the radial direction of the rotor core.

As a preferred technical solution of the rotor structure, the first wedge plate is flush with the outer peripheral wall of the rotor core.

As a preferable technical scheme of the rotor structure, the magnetism isolating strip is an integrated part.

As the preferred technical scheme of rotor structure, V-arrangement magnet steel groove is including being V-arrangement first magnet steel groove and second magnet steel groove, the magnet steel includes first magnet steel and second magnet steel, first magnet steel inserts and locates first magnet steel groove, second magnet steel inserts and locates second magnet steel groove.

As the preferred technical scheme of rotor structure, the both ends of first magnet steel with the cell wall of first magnet steel groove encloses to establish two air tanks, the both ends of second magnet steel with the cell wall of second magnet steel groove encloses to establish two air tanks.

As a preferable mode of the rotor structure, the rotor core is provided with a plurality of lightening holes around a circumferential equiangular degree thereof.

In another aspect, the present utility model provides a motor, including a motor casing and a rotor structure in any of the above aspects, where the rotor structure is inserted into the motor casing and is disposed coaxially with the motor casing.

The beneficial effects of the utility model are as follows:

the utility model provides a rotor structure and a motor, wherein the rotor structure comprises a rotor iron core, magnetic steel and magnetic isolation strips, the rotor iron core is formed by laminating a plurality of rotor punching sheets, a plurality of V-shaped magnetic steel grooves are formed in the rotor iron core around the circumference of the rotor iron core, the openings of the V-shaped magnetic steel grooves face the outer circumferential surface of the rotor iron core, the plurality of magnetic isolation grooves are positioned between the V-shaped magnetic steel grooves and the outer circumferential surface of the rotor iron core, and each magnetic isolation groove is respectively opposite to the adjacent ends of two adjacent V-shaped magnetic steel grooves; the plurality of magnetic steels are inserted into the plurality of V-shaped magnetic steel grooves in a one-to-one correspondence manner; the magnetism isolating strips are provided with a plurality of magnetism isolating strips, are inserted in the magnetism isolating grooves in a one-to-one correspondence manner and are abutted with the inner walls of the corresponding magnetism isolating grooves. The rotor core is laminated by a plurality of rotor punching and forms, still is provided with hole class structure such as V-arrangement magnet steel groove on the rotor core, and then leads to rotor core's intensity not high, can't bear the centrifugal force that high-speed rotation brought, and for this reason, this application is divided into two parts with rotor core and magnetism isolating strip, has set up magnetism isolating groove on rotor core, and magnetism isolating strip inserts and locates magnetism isolating inslot, plays the effect to magnet steel magnetism isolating on the one hand, has promoted rotor core holistic intensity on the other hand, makes it can be applicable to high-speed pivoted motor.

Drawings

FIG. 1 is a schematic diagram of a prior art rotor structure;

FIG. 2 is a schematic diagram of a rotor structure according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a rotor structure according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic structural view of a rotor punching sheet according to an embodiment of the present utility model.

In the figure:

1. a rotor core; 11. rotor punching; 12. v-shaped magnetic steel groove; 121. a first magnetic steel groove; 122. a second magnetic steel groove; 123. an air tank; 13. a magnetism isolating groove; 131. a first wedge-shaped groove; 132. a second wedge-shaped groove; 14. a lightening hole;

2. magnetic steel; 21. a first magnetic steel; 22. a second magnetic steel;

3. a magnetic isolation strip; 31. a first wedge plate; 32. and a second wedge plate.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 2 to 5, the present embodiment provides a rotor structure including a rotor core 1, magnetic steels 2, and magnetic shielding strips 3, the rotor core 1 being laminated by a plurality of rotor punching sheets 11, the rotor core 1 being provided with a plurality of V-shaped magnetic steel grooves 12 around its circumference, the openings of the V-shaped magnetic steel grooves 12 being directed toward the outer peripheral surface of the rotor core 1, a plurality of magnetic shielding grooves 13 being located between the V-shaped magnetic steel grooves 12 and the outer peripheral surface of the rotor core 1, each magnetic shielding groove 13 being respectively opposed to adjacent ends of two adjacent V-shaped magnetic steel grooves 12; the plurality of magnetic steels 2 are arranged, and the plurality of magnetic steels 2 are inserted into the plurality of V-shaped magnetic steel grooves 12 in a one-to-one correspondence manner; the magnetism isolating strips 3 are provided with a plurality of magnetism isolating strips 3, and the magnetism isolating strips 3 are inserted in the magnetism isolating grooves 13 in a one-to-one correspondence manner and are abutted against the inner walls of the corresponding magnetism isolating grooves 13. The rotor core 1 is laminated by a plurality of rotor punching 11 and forms, still is provided with hole class structure such as V-arrangement magnet steel groove 12 on the rotor core 1, and then leads to the intensity of rotor core 1 not high, can't bear the centrifugal force that high-speed rotation brought, and for this reason, this application is divided into two parts with rotor core 1 and magnetism isolating stripe 3, has set up magnetism isolating groove 13 on rotor core 1, and magnetism isolating stripe 3 inserts and locates magnetism isolating groove 13, plays on the one hand to magnet steel 2 and separates the effect, on the other hand has promoted rotor core 1 holistic intensity, makes it can be applicable to high-speed pivoted motor.

Specifically, the magnetic isolation plate is made of non-magnetic conductive materials, specifically stainless steel, aluminum alloy and the like.

Alternatively, the magnetism isolating groove 13 is a groove concavely provided on the outer peripheral surface of the rotor core 1. In this embodiment, the magnetism isolating slot 13 extends along the axial direction of the stator core, and the magnetism isolating slot 13 is a groove concavely formed on the outer peripheral surface of the rotor core 1, so that the thickness of the magnetism isolating strip 3 can be controlled not to be too thick, and a better magnetism isolating effect can be ensured. In other embodiments, the magnetism isolating slot 13 may be a jack concavely formed on the rotor core 1 along the axis of the rotor core 1.

Alternatively, the magnetism isolating groove 13 includes a first wedge-shaped groove 131, and the first wedge-shaped groove 131 is opposite to adjacent ends of the adjacent two V-shaped magnetic steel grooves 12; the magnetic shielding strip 3 comprises a first wedge-shaped plate 31, the first wedge-shaped plate 31 is inserted into the first wedge-shaped groove 131, and the first wedge-shaped plate 31 is clamped with the rotor core 1 along the radial direction of the rotor core 1. In the present embodiment, the first wedge plate 31 has a magnetism isolating effect at a position opposite to the adjacent ends of the adjacent two V-shaped magnetic steel grooves 12. The first wedge plate 31 and the first wedge groove 131 are both of inverted trapezoid structures, and thus the first wedge plate 31 can be prevented from being pulled out of the first wedge groove 131 in the radial direction of the rotor core 1.

Alternatively, the first wedge plate 31 abuts against the groove wall of the first wedge groove 131, preventing the first wedge plate 31 from coming out of the first wedge groove 131 in the axial direction of the rotor core 1.

Optionally, the magnetism isolating slot 13 further includes a second wedge slot 132, and the slot wall of the first wedge slot 131 is concavely provided with the second wedge slot 132; the magnetic shielding strip 3 further comprises a second wedge plate 32 fixedly connected with the first wedge plate 31, the first wedge plate 31 is inserted into the first wedge groove 131, so that the second wedge plate 32 is inserted into the second wedge groove 132, and the second wedge plate 32 is clamped with the rotor core 1 along the radial direction of the rotor core 1. In this embodiment, the second wedge-shaped groove 132 and the second wedge-shaped plate 32 are both in inverted trapezoid structures, so that the second wedge-shaped plate 32 is clamped with the rotor core 1 along the radial direction of the rotor core 1. The magnetic shield bridge is further prevented from coming out of the magnetic shield grooves 13 of the rotor core 1 in the radial direction of the rotor core 1. The first wedge plate 31 and the second wedge groove 132 form a T-shaped structure, so that the overall strength of the magnetic isolation bridge is improved, and the overall strength of the rotor core 1 is improved.

Alternatively, the first wedge plate 31 is flush with the outer peripheral wall of the rotor core 1. In this embodiment, the wind resistance of the rotor structure during the whole rotation can be reduced.

Alternatively, the magnetism barrier strip 3 is an integral piece. In this embodiment, the overall strength of the magnetism insulator 3 can be further improved. The magnetism isolating bridge can be integrally formed through casting process, forging process or machining process.

Optionally, the V-shaped magnetic steel groove 12 includes a first magnetic steel groove 121 and a second magnetic steel groove 122 that are V-shaped, the magnetic steel 2 includes a first magnetic steel 21 and a second magnetic steel 22, the first magnetic steel 21 is inserted into the first magnetic steel groove 121, and the second magnetic steel 22 is inserted into the second magnetic steel groove 122. In this embodiment, the first magnetic steel groove 121 and the second magnetic steel groove 122 are disposed independently, and the region between the first magnetic steel groove 121 and the second magnetic steel groove 122 is used as a magnetism isolating region, so as to achieve magnetism isolating effect.

Alternatively, two air grooves 123 are defined by two ends of the first magnetic steel 21 and the groove wall of the first magnetic steel groove 121, and two air grooves 123 are defined by two ends of the second magnetic steel 22 and the groove wall of the second magnetic steel groove 122. In this embodiment, the air groove 123 may play a role in heat dissipation.

As a preferred embodiment of the rotor structure, the rotor core 1 is provided with a plurality of lightening holes 14 at equal angles around the circumference thereof. In this embodiment, the weight reducing holes 14 can reduce the weight of the rotor structure, reduce the centrifugal force, and perform a rapid heat dissipation function.

The embodiment also provides a motor, including the rotor structure in motor casing and the above-mentioned scheme, rotor structure inserts and locates the motor casing and set up with the motor casing coaxial line.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Rotor structure, its characterized in that includes:

the rotor core (1) is formed by laminating a plurality of rotor punching sheets (11), a plurality of V-shaped magnetic steel grooves (12) are formed in the rotor core (1) around the circumference of the rotor core, the openings of the V-shaped magnetic steel grooves (12) face the outer circumferential surface of the rotor core (1), a plurality of magnetism isolating grooves (13) are positioned between the V-shaped magnetic steel grooves (12) and the outer circumferential surface of the rotor core (1), and each magnetism isolating groove (13) is opposite to the adjacent ends of two adjacent V-shaped magnetic steel grooves (12) respectively;

the magnetic steels (2) are arranged in a plurality, and the magnetic steels (2) are inserted into the V-shaped magnetic steel grooves (12) in a one-to-one correspondence manner;

the magnetic isolation strips (3) are arranged in a plurality, the magnetic isolation strips (3) are inserted in the magnetic isolation grooves (13) in a one-to-one correspondence mode and are abutted to the inner walls of the corresponding magnetic isolation grooves (13).

2. The rotor structure according to claim 1, wherein the magnetism isolating grooves (13) are grooves concavely provided on the outer peripheral surface of the rotor core (1).

3. The rotor structure according to claim 2, characterized in that the magnetism isolating grooves (13) comprise first wedge-shaped grooves (131), the first wedge-shaped grooves (131) being opposite to adjacent ends of adjacent two V-shaped magnetic steel grooves (12);

the magnetic isolation strip (3) comprises a first wedge-shaped plate (31), the first wedge-shaped plate (31) is inserted into the first wedge-shaped groove (131), and the first wedge-shaped plate (31) is clamped with the rotor core (1) along the radial direction of the rotor core (1).

4. A rotor structure according to claim 3, characterized in that the magnetic isolation groove (13) further comprises a second wedge-shaped groove (132), the groove wall of the first wedge-shaped groove (131) being concavely provided with the second wedge-shaped groove (132);

the magnetic shielding strip (3) further comprises a second wedge plate (32) fixedly connected with the first wedge plate (31), the first wedge plate (31) is inserted into the first wedge groove (131), the second wedge plate (32) is inserted into the second wedge groove (132), and the second wedge plate (32) is radially connected with the rotor core (1) in a clamping mode along the rotor core (1).

5. A rotor structure according to claim 3, characterized in that the first wedge plate (31) is flush with the outer circumferential wall of the rotor core (1).

6. Rotor structure according to claim 4, characterized in that the magnetic barrier strips (3) are integrally formed.

7. The rotor structure according to any one of claims 1-6, wherein the V-shaped magnetic steel groove (12) comprises a first magnetic steel groove (121) and a second magnetic steel groove (122) which are V-shaped, the magnetic steel (2) comprises a first magnetic steel (21) and a second magnetic steel (22), the first magnetic steel (21) is inserted into the first magnetic steel groove (121), and the second magnetic steel (22) is inserted into the second magnetic steel groove (122).

8. The rotor structure according to claim 7, wherein two air grooves (123) are defined by two ends of the first magnetic steel (21) and a groove wall of the first magnetic steel groove (121), and two air grooves (123) are defined by two ends of the second magnetic steel (22) and a groove wall of the second magnetic steel groove (122).

9. A rotor structure according to any one of claims 1-6, characterized in that the rotor core (1) is provided with a plurality of lightening holes (14) equiangularly around its circumference.

10. An electric motor comprising a motor housing and a rotor structure according to any one of claims 1-9, said rotor structure being inserted into and arranged coaxially with said motor housing.