CN211089261U

CN211089261U - Rotor structure and motor

Info

Publication number: CN211089261U
Application number: CN201922277258.7U
Authority: CN
Inventors: 王鑫
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-07-24
Anticipated expiration: 2029-12-16

Abstract

The utility model relates to an electrical equipment technical field, and specifically disclose a rotor structure and motor, wherein, rotor structure includes magnetic conduction yoke and permanent magnet, the magnetic conduction yoke is the annular structure, the magnetic conduction yoke passes through the mounting with the permanent magnet and is connected, the mounting includes that connecting portion and interval set up first spacing portion and the spacing portion of second on connecting portion, the outer wall annular of magnetic conduction yoke sets up two at least fixed slots, at least one cell wall indent of fixed slot is equipped with the spacing groove, fixed slot and spacing groove all communicate the same terminal surface of magnetic conduction yoke axis direction, spacing inslot is located to first spacing portion card, connecting portion are located between two adjacent permanent magnets, the spacing portion of second supports tightly respectively and keeps away from one side of magnetic conduction yoke at two adjacent permanent magnets. Through the setting have the mounting of two spacing portions, can cooperate fixed slot and spacing groove on the magnetic conduction yoke to fix the permanent magnet, make the permanent magnet clamp tightly between the outer wall of magnetic conduction yoke and the spacing portion of second, equipment easy operation, it is fixed effectual.

Description

Rotor structure and motor

Technical Field

The utility model relates to an electrical equipment technical field especially relates to a rotor structure and contain motor of this rotor structure.

Background

The surface-mounted permanent magnet synchronous motor (SPMSM) driving system has the advantages of quick response, convenience in control, high efficiency and the like, and is widely applied to the field of electric transmission of household appliances, electric automobiles and the like. The rotor structure of the surface-mounted permanent magnet synchronous motor comprises a magnetic conduction magnetic yoke and a plurality of permanent magnets which are annularly arranged on the outer peripheral wall or the inner peripheral wall of the magnetic conduction magnetic yoke, and the permanent magnets are adhered to the magnetic conduction magnetic yoke by adopting adhesive. This structure has the following drawbacks: the adhesive is easy to age and lose efficacy after long-time work, so that the permanent magnet falls off, the process requirement in the permanent magnet bonding process is high, the condition of poor bonding effect is easy to occur, and the permanent magnet falls off.

In order to solve the problems, the conventional means is to provide a rotor sheath, the rotor sheath is used for improving the connection reliability of the permanent magnet and the magnetic conduction magnet yoke, but the rotor sheath is mostly fixed outside the permanent magnet in a hot-assembling mode, so that the permanent magnet is partially demagnetized, the assembling process of the rotor sheath is complex, and the processing difficulty is high.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: provided are a rotor structure and a motor, which are low in assembly difficulty and in which permanent magnets are not easily detached after assembly.

To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:

the first aspect provides a rotor structure, including magnetic conduction yoke and permanent magnet, the magnetic conduction yoke is the annular structure, the magnetic conduction yoke with the permanent magnet passes through the mounting and connects, the mounting includes that connecting portion and interval set up first spacing portion and the spacing portion of second on the connecting portion, the outer wall ring shape of magnetic conduction yoke sets up two at least fixed slots, the quantity of fixed slot with the quantity of permanent magnet is unanimous, at least one cell wall indent of fixed slot is equipped with the spacing groove, the fixed slot with the spacing groove all communicates the same terminal surface of magnetic conduction yoke axis direction, first spacing portion card is located spacing inslot, connecting portion are located adjacent two between the permanent magnet, the spacing portion of second supports tightly respectively two adjacent permanent magnet is kept away from one side of magnetic conduction yoke.

As a preferred scheme of the rotor structure, the permanent magnet has a first side surface abutting against the magnetic yoke and a second side surface abutting against the second limiting portion, the first side surface and the second side surface are both arc-shaped, the center of circle of the first side surface coincides with the axis of the magnetic yoke, and the center of circle of the second side surface is spaced from the center of circle of the first side surface.

As a preferable scheme of the rotor structure, the distance between the circle center of the first side surface and the circle center of the second side surface is 10-30 mm.

As a preferable scheme of the rotor structure, the fixing groove and the limiting groove both penetrate through the magnetic yoke along the axial direction of the magnetic yoke.

As a preferred scheme of the rotor structure, the two opposite groove walls of the fixing groove are provided with the limiting grooves, and the first limiting parts are clamped in the limiting grooves.

As a preferable configuration of the rotor structure, the first position-limiting portion is disposed at the first end of the connecting portion, the position-limiting groove is adjacent to a groove bottom of the fixing groove, and one groove wall of the position-limiting groove coincides with the groove bottom of the fixing groove.

As a preferable scheme of the rotor structure, the second limiting portion is disposed at a second end of the connecting portion, the connecting portion is disposed at a non-end position of the second limiting portion, and two ends of the second limiting portion respectively abut against one side of each of the two adjacent permanent magnets, which is away from the magnetic conductive yoke.

As a preferable scheme of the rotor structure, one side surface of the second limiting part close to the permanent magnet is attached to the second side surface of the permanent magnet.

As a preferable scheme of the rotor structure, the fixing piece is made of a non-magnetic material.

As a preferable scheme of the rotor structure, an anti-conductive isolation layer is arranged outside the fixing piece.

As a preferable scheme of the rotor structure, an adhesive layer is arranged outside the fixing piece.

As a preferable scheme of the rotor structure, the adhesive layer is epoxy adhesive or anaerobic adhesive.

In a second aspect, an electrical machine is provided comprising the rotor structure.

The utility model discloses beneficial effect does: through the setting have the mounting of two spacing portions, can cooperate fixed slot and spacing groove on the magnetic conduction yoke to fix the permanent magnet, make the permanent magnet press from both sides tightly between the outer wall of magnetic conduction yoke and the spacing portion of second, equipment easy operation, and fixed effectual need not to set up the adhesive between permanent magnet and magnetic conduction yoke, also need not to set up the rotor sheath, reduced the risk that the permanent magnet drops effectively, also guaranteed simultaneously that the permanent magnet does not lose magnetism.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic cross-sectional view of a rotor structure according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the magnetic yoke according to the embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

Fig. 4 is a schematic structural diagram of a permanent magnet according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a fixing member according to an embodiment of the present invention.

In the figure:

1. a magnetic conductive yoke; 11. fixing grooves; 12. a limiting groove;

2. a permanent magnet; 21. a first side surface; 22. a second side surface;

3. a fixing member; 31. a connecting portion; 32. a first limiting part; 33. a second limiting part.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to 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, detachably 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

As shown in fig. 1 to 5, the rotor structure according to the embodiment of the present invention is applied in the field of motors, especially permanent magnet motors. Rotor structure includes magnetic conduction yoke 1 and permanent magnet 2, magnetic conduction yoke 1 is the annular structure, magnetic conduction yoke 1 passes through mounting 3 with permanent magnet 2 and is connected, mounting 3 includes connecting portion 31 and the spacing first spacing portion 32 and the spacing portion 33 of second that sets up on connecting portion 31, the outer wall annular of magnetic conduction yoke 1 sets up two at least fixed slots 11, the quantity of fixed slot 11 is unanimous with the quantity of permanent magnet 2, at least one cell wall indent of fixed slot 11 is equipped with spacing groove 12, fixed slot 11 and spacing groove 12 all communicate the same terminal surface of 1 axis direction of magnetic conduction yoke, spacing inslot 12 is located in first spacing portion 32 card, connecting portion 31 is located between two adjacent permanent magnets 2, spacing portion 33 of second supports tightly respectively in two adjacent permanent magnets 2 one side of keeping away from magnetic conduction yoke 1.

During the installation, laminate two permanent magnets 2 on the outer wall of magnetic conduction yoke 1 earlier, make to have the clearance between two permanent magnets 2, the clearance is just to fixed slot 11, then the part that is equipped with first spacing portion 32 with mounting 3 is inserted by the terminal surface of magnetic conduction yoke 1 intercommunication fixed slot 11, make first spacing portion 32 insert the spacing inslot 12 of fixed slot 11, and make permanent magnet 2 be close to the tip in clearance insert between spacing portion 33 of second and the magnetic conduction yoke 1, then promote mounting 3 and remove in fixed slot 11 along the axis direction of magnetic conduction yoke 1 again, until permanent magnet 2 by the chucking on magnetic conduction yoke 1, then other mounting 3 is assembled again, until all permanent magnets 2 are all fixed. The permanent magnet 2 can be fixed by arranging the fixing piece 3 with two limiting parts and matching with the fixing groove 11 and the limiting groove 12 on the magnetic conduction magnetic yoke 1, so that the permanent magnet 2 is clamped between the outer wall of the magnetic conduction magnetic yoke 1 and the second limiting part 33, the assembling operation is simple, and the fixing effect is good; further, no adhesive or a small amount of adhesive is needed to be arranged between the permanent magnet 2 and the magnetic conduction magnetic yoke 1, and a rotor sheath is not needed to be arranged, so that the risk of falling off of the permanent magnet 2 is effectively reduced, and the permanent magnet 2 is not lost due to the fact that the step of heating and assembling the rotor sheath is omitted.

The fixed slot 11 and the spacing groove 12 of seting up on the magnetic conduction yoke 1 can only communicate a terminal surface of 1 axis direction of magnetic conduction yoke, also can directly run through whole magnetic conduction yoke 1 along the axis direction, when only communicating a terminal surface of 1 axis direction of magnetic conduction yoke, can also carry on spacingly to the shift position of mounting 3, reduce the assembly degree of difficulty, and when fixed slot 11 and spacing groove 12 run through whole magnetic conduction yoke 1, can reduce the degree of difficulty of processing fixed slot 11 and spacing groove 12 on magnetic conduction yoke 1.

In this embodiment, the magnetic yoke 1 is made of metal materials with good magnetic conductivity, such as electrical pure iron, 10# steel, silicon steel sheets, etc., and the fixing member 3 is made of non-magnetic materials, which may be non-magnetic metal materials or non-magnetic non-metal materials, and the non-magnetic metal materials may be 304, 316L, etc.

The quantity of permanent magnet 2 is selected according to the number of pole pairs of motor the utility model discloses a specific embodiment, the outer wall annular interval of magnetic conduction yoke 1 has 22 permanent magnets 2, correspondingly ground, sets up the quantity of fixed slot 11 on magnetic conduction yoke 1 also for 22.

In an embodiment, two opposite groove walls of the fixing groove 11 are respectively provided with a limiting groove 12, and a first limiting portion 32 is clamped in each limiting groove 12. The arrangement of the two limit grooves 12 can increase the connection stability of one end of the fixing member 3 inserted into the fixing groove 11, thereby ensuring the fixing stability of the permanent magnet 2.

In this embodiment, the first position-limiting portion 32 may be disposed at the first end of the connecting portion 31, and correspondingly, the position-limiting groove 12 is opened at a position of the fixing groove 11 adjacent to the groove bottom, and one of the groove walls of the position-limiting groove 12 coincides with the groove bottom of the fixing groove 11.

Of course, in other embodiments, the first position-limiting portion 32 may also be disposed at a non-end position of the connecting portion 31, that is, the first position-limiting portion 32 is adjacent to the first end of the connecting portion 31, and the position-limiting groove 12 is opened on a groove wall of the fixing groove 11 and is spaced from a groove bottom of the fixing groove 11.

The first limiting portions 32 may be two or only one, when the first limiting portions 32 are two, the two first limiting portions 32 are respectively disposed on two opposite sides of the connecting portion 31, and when the first limiting portion 32 is one, the first end of the connecting portion 31 is connected to a non-end portion of the first limiting portion 32 (optimally, the first end of the connecting portion is connected to a middle portion of the first limiting portion 32), or a through hole is formed in the non-end portion of the first limiting portion 32, and the first end of the connecting portion 31 passes through the through hole and then is connected to the first limiting portion 32.

The second stopper portion 33 is provided at the second end of the connecting portion 31, the first end of the connecting portion 31 and the second end of the connecting portion 31 are both ends in the longitudinal direction of the connecting portion 31 (i.e., the radial direction of the magnetic conductive yoke 1 shown in the figure), the connecting portion 31 is provided at a non-end portion position of the second stopper portion 33, and both ends of the second stopper portion 33 are respectively in contact with the sides of the adjacent two permanent magnets 2 away from the magnetic conductive yoke 1.

Preferably, the second end of the connecting portion 31 is connected to the middle of the second stopper portion 33.

In a specific embodiment of the present invention, the connecting portion 31, the first position-limiting portion 32 and the second position-limiting portion 33 are formed by a metal integrated machine. The fixing member 3 is integrally formed, and therefore, the strength is high, and the assembling process of the connecting portion 31, the first stopper portion 32, and the second stopper portion 33 can be omitted.

In other embodiments, the connecting portion 31, the first position-limiting portion 32 and the second position-limiting portion 33 may also be connected into a whole by welding.

In an embodiment, the permanent magnet 2 has a first side surface 21 abutting against the magnetic yoke 1 and a second side surface 22 abutting against the second limiting portion 33, the first side surface 21 and the second side surface 22 are both arc-shaped, the center of circle of the first side surface 21 coincides with the axis of the magnetic yoke 1, and the center of circle of the second side surface 22 and the center of circle of the first side surface 21 are arranged at intervals. The circle center of the first side surface 21 is overlapped with the axis of the magnetic conduction magnetic yoke 1, so that the first side surface 21 of the permanent magnet 2 can be completely attached to the outer wall of the magnetic conduction magnetic yoke 1, no gap exists between the permanent magnet 2 and the magnetic conduction magnetic yoke 1, and the stability of the fixed permanent magnet 2 is improved; the first side surface 21 and the second side surface 22 of the permanent magnet 2 are arranged to be eccentric structures (namely, the centers of the circles of the first side surface and the second side surface are not concentric), so that magnetic density harmonics in an air gap can be reduced, an installation space is reserved for the fixing piece 3, and the second side surface 22 protruding out of the permanent magnet 2 is prevented from being too much in the middle of the second limiting portion 33.

In the embodiment, the center of the first side surface 21 is spaced from the center of the second side surface 22 by 10mm to 30 mm.

As shown in fig. 1 and 5, in order to reduce the outward protruding size of the second limiting portion 33, the second limiting portion 33 is set to be a structure with two sharp ends, thin and thick middle portions, that is, one side surface of the second limiting portion 33 attached to the permanent magnet 2 is intersected with two ends of one side surface deviating from the permanent magnet 2 in the length direction, and the thicker portion of the middle portion of the second limiting portion 33 is formed with a containing area due to the eccentric arrangement of the permanent magnet 2, so that the middle portion of the second limiting portion 33 is contained as much as possible, and the sharp thin portions at two ends of the second limiting portion 33 are attached to the second side surface 22 of the permanent magnet 2, which can also reduce the resistance of the rotor structure during rotation.

One side surface of the second limiting part 33 close to the permanent magnet 2 is attached to the second side surface 22 of the permanent magnet 2. The attaching mode can avoid generating a gap between the second limiting part 33 and the second side surface 22 of the permanent magnet 2, and the stability of the fixing piece 3 in fixing the permanent magnet 2 is improved.

In one embodiment, an adhesive layer is disposed outside the fixing member 3. Through setting up the viscose layer, can increase the joint strength of mounting 3 and magnetic conduction yoke 1 and permanent magnet 2 on the one hand, prevent that mounting 3 from taking place relative displacement when rotor structure rotates, on the other hand can also utilize this viscose layer to form the isolation, prevents that mounting 3 is electrically conductive.

In order to enhance the sticking effect, an adhesive layer can be brushed in the fixing groove 11 and the limiting groove 12.

In this embodiment, the adhesive layer is epoxy adhesive or anaerobic adhesive.

In other embodiments, an anti-conductive isolation layer may be disposed outside the fixing member 3, and the fixing member 3 may be isolated by the anti-conductive isolation layer.

The embodiment of the utility model provides a still provide a motor, including the rotor structure of as above arbitrary embodiment, the concrete structure of rotor structure here is no longer repeated.

In the description herein, it is to be understood that the terms "upper" and the like are used in a descriptive sense and based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, configuration and operation in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment 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.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides a rotor structure, includes magnetic conduction yoke and permanent magnet, the magnetic conduction yoke is annular structure, its characterized in that, the magnetic conduction yoke with the permanent magnet passes through the mounting and connects, the mounting includes that connecting portion and interval set up first spacing portion and the spacing portion of second on the connecting portion, the outer wall annular of magnetic conduction yoke sets up two at least fixed slots, the quantity of fixed slot with the quantity of permanent magnet is unanimous, at least one cell wall indent of fixed slot is equipped with the spacing groove, the fixed slot with the spacing groove all communicates the same terminal surface of magnetic conduction yoke axis direction, first spacing portion card is located spacing inslot, connecting portion are located adjacent two between the permanent magnet, the spacing portion of second supports tightly respectively two the permanent magnet is kept away from one side of magnetic conduction yoke.

2. The rotor structure according to claim 1, wherein the permanent magnet has a first side surface abutting against the magnetic yoke and a second side surface abutting against the second limiting portion, the first side surface and the second side surface are both arc-shaped, a center of the first side surface coincides with an axis of the magnetic yoke, and a center of the second side surface is spaced from a center of the first side surface.

3. The rotor structure of claim 2, wherein the center of the first side surface is spaced 10mm to 30mm from the center of the second side surface.

4. The rotor structure of claim 1, wherein the fixing groove and the limiting groove penetrate the magnetic yoke in an axial direction of the magnetic yoke.

5. The rotor structure of claim 1, wherein the two opposite groove walls of the fixing groove are provided with the limiting grooves, and the first limiting portion is clamped in each limiting groove.

6. The rotor structure of claim 1 or 5, wherein the first limiting portion is disposed at the first end of the connecting portion, the limiting groove is adjacent to a groove bottom of the fixing groove, and one of groove walls of the limiting groove coincides with the groove bottom of the fixing groove.

7. The rotor structure according to claim 1, wherein the second position-limiting portion is disposed at a second end of the connecting portion, the connecting portion is disposed at a non-end position of the second position-limiting portion, and two ends of the second position-limiting portion respectively abut against sides of two adjacent permanent magnets away from the magnetic yoke.

8. The rotor structure of claim 7, wherein a side surface of the second limiting portion close to the permanent magnet is attached to a second side surface of the permanent magnet.

9. The rotor structure of claim 1, wherein the stator is made of a non-magnetically conductive material.

10. The rotor structure of claim 1, wherein the fixture is externally provided with an electrically-conductive-proof isolation layer.

11. The rotor structure of claim 1, wherein an adhesive layer is disposed outside the fixing member.

12. The rotor structure of claim 11, wherein the adhesive layer is epoxy adhesive or anaerobic adhesive.

13. An electrical machine comprising a rotor structure according to any one of claims 1 to 12.