CN217508375U - Motor rotor and motor - Google Patents

Abstract

The utility model discloses an electric motor rotor and motor, electric motor rotor includes: the two ends of the iron core assembly are respectively provided with two end rings, the iron core assembly comprises a plurality of iron core rings which are sequentially arranged along the axial direction of the iron core assembly, the end rings are abutted against the iron core rings which are arranged close to the end rings, each iron core ring is provided with a guide groove, and the guide grooves of all the iron core rings are sequentially communicated into a channel; the guide bar penetrates through the channel to penetrate through the iron core assembly, two ends of the guide bar are respectively connected with the two end rings, and bosses are formed on the guide bar at positions corresponding to the guide grooves; the end ring and the bosses arranged close to the end ring, and any two adjacent bosses are mutually connected and distributed in a staggered manner along the radial direction and/or the circumferential direction of the iron core assembly to form a stepped structure, and the stepped surface of the stepped structure is abutted against the end surface of the iron core ring on the same side of the stepped structure. The utility model discloses electric motor rotor's iron core subassembly and conducting bar and the butt face between the end links can produce frictional force, eliminate the conducting bar fracture risk for electric motor rotor can adapt to higher rotational speed operating mode.

Description

Motor rotor and motor

Technical Field

The utility model relates to a power spare technical field, in particular to electric motor rotor and motor.

Background

The squirrel-cage motor rotor is an important part in an asynchronous motor, has wide application in the industrial field, and gradually becomes an important choice of a main drive motor or an auxiliary drive motor along with the vigorous development of the new energy automobile industry and the continuous rising of the price of rare earth raw materials. Different from industrial asynchronous motors, the requirements on the rotating speed of the asynchronous motor of the new energy automobile are high, and the highest rotating speed can reach 16000rpm, even exceeds 18000 rpm. In addition, the new energy automobile motor has complex working conditions, is often in variable speed and variable load, and the motor rotor is subjected to high-speed centrifugal force impact. Under the action of high-speed centrifugal force, the conducting bar of the motor rotor can deform, particularly, the stress concentration phenomenon exists at the joint of the end ring and the conducting bar, and the risk of fracture failure exists.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing an electric motor rotor and motor, the conducting bar that aims at solving electric motor rotor among the prior art has the technical problem of fracture risk.

In order to achieve the above object, the utility model provides an electric motor rotor, electric motor rotor includes:

the two ends of the iron core assembly are respectively provided with two end rings, the iron core assembly comprises a plurality of iron core rings which are sequentially arranged along the axial direction of the iron core assembly, the end rings are abutted against the iron core rings which are arranged close to the end rings, each iron core ring is provided with a guide groove, and the guide grooves of all the iron core rings are sequentially communicated to form a channel;

the guide bar penetrates through the channel to penetrate through the iron core assembly, two ends of the guide bar are respectively connected with the two end rings, and a boss is formed on the guide bar at a position corresponding to each guide groove; the end ring with be close to its setting between the boss, and arbitrary adjacent two interconnect and follow between the boss the radial and/or the crisscross distribution of circumference of iron core subassembly form stair structure, stair structure's ladder surface with rather than the homonymy the terminal surface butt of iron core ring.

Preferably, any two adjacent guide grooves are partially overlapped along the radial direction and/or the circumferential direction of the iron core assembly, and the bosses are matched with the corresponding guide grooves in shape and are embedded in the corresponding guide grooves.

Preferably, the guide groove is a closed groove and is located near the outer edge of the core ring.

Preferably, the length direction of guide slot with the radial direction of iron core subassembly is unanimous, the width direction of guide slot with the circumference direction of iron core subassembly is unanimous, just the width size of guide slot is along being close to the direction of iron core ring inner edge is the convergent setting.

Preferably, any two adjacent guide slots are aligned at an end near the outer edge of the core ring, and the length of one of the guide slots is greater than that of the other guide slot.

Preferably, two ends of any two adjacent guide grooves are respectively aligned, and on the same radial line of the iron core assembly, the width of one of the guide grooves is larger than that of the other guide groove.

Preferably, each core ring is formed by sequentially stacking a plurality of punching sheets along the axial direction of the core assembly, each punching sheet is provided with a punched hole, and the plurality of punched holes of all the punching sheets are sequentially communicated to form the guide groove.

Preferably, in each iron core ring, the plurality of punched holes are arranged oppositely to form the straight strip-shaped guide groove consistent with the axial extension direction of the iron core assembly;

alternatively, the first and second liquid crystal display panels may be,

in each iron core ring, a plurality of punched holes are distributed in a staggered mode in sequence along the circumferential direction of the iron core assembly so as to form the arc-shaped guide groove extending along the circumferential direction of the iron core assembly.

Preferably, each iron core ring is provided with a plurality of guide grooves, the guide grooves are arranged at intervals along the circumferential direction of the iron core ring, the guide grooves on all the iron core rings are consistent in number and communicated with one another in a one-to-one correspondence manner to form a plurality of channels, and one guide bar penetrates through each channel.

The utility model discloses still provide a motor, the motor includes as above electric motor rotor.

In the technical scheme of the utility model, in the motor rotor, the position of each guide groove on the conducting bar forms a boss, a ladder structure is formed between the end ring and the boss arranged near the end ring and between any two adjacent bosses which are mutually connected and distributed along the radial direction and/or the circumferential direction of the iron core assembly in a staggered way, the ladder structure is provided with a ladder surface, the ladder surface can be abutted against the end surface of the iron core ring at the same side of the ladder surface, so that the conducting bar and the end ring are abutted against the end surfaces of a plurality of iron core rings, the mutual extrusion pre-tightening of the conducting bar and the end ring and the plurality of iron core rings is realized, and further the sectional type extrusion pre-tightening of the conducting bar and the end ring and the iron core assembly is realized, therefore, when the motor rotor rotates, the abutting surfaces between the iron core assembly and the conducting bar and the end ring can generate friction force for offsetting the centrifugal force, the friction force restrains the conducting bar and the end ring, and further overcomes the deformation of the conducting bar and the end ring under the action of the centrifugal force, the stress at the joint of the conducting bar and the end ring is reduced, the stress concentration phenomenon is avoided, the mechanical strength of the joint of the conducting bar and the end ring is further enhanced, the risk of breakage of the conducting bar is eliminated, and the motor rotor can adapt to the higher rotating speed working condition.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is an assembly schematic view of a motor rotor according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a motor rotor according to an embodiment of the present invention;

FIG. 3 is an enlarged view of area A of FIG. 2;

fig. 4 is a schematic cross-sectional view of an electric motor rotor according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of an iron core assembly in an electric motor rotor according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first punching sheet in a motor rotor according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a second punching sheet in an electric motor rotor according to an embodiment of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiments of the present invention, the directional indications are only used for explaining the relative position relationship between the components, the motion situation, etc. under a certain posture (as shown in the drawings), and if the certain posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an electric motor rotor 100.

As shown in fig. 1 to 5, in an embodiment, the motor rotor 100 includes an iron core assembly 10 and a conducting bar 30, wherein two end rings 20 are respectively disposed at two ends of the iron core assembly 10, the iron core assembly 10 includes a plurality of iron core rings 11 sequentially arranged along an axial direction thereof, the end rings 20 are abutted to the iron core rings 11 disposed close to the end rings, each iron core ring 11 is provided with a guiding groove 111, and the guiding grooves 111 of all the iron core rings 11 are sequentially communicated to form a channel 12; the guide bar 30 is arranged in the channel 12 in a penetrating way to penetrate through the iron core assembly 10, two ends of the guide bar 30 are respectively connected with the two end rings 20, and a boss 31 is formed on the guide bar 30 corresponding to the position of each guide groove 111; the end ring 20 and the bosses 31 arranged close to the end ring, and any two adjacent bosses 31 are connected with each other and distributed in a staggered manner along the radial direction and/or the circumferential direction of the iron core assembly 10 to form a stepped structure 40, and the stepped surface 41 of the stepped structure 40 is abutted with the end surface of the iron core ring 11 on the same side as the stepped structure.

Specifically, the axial direction of the core assembly 10 is the left-right direction, and the two end rings 20 are respectively disposed at the left and right ends of the core assembly 10. The iron core assembly 10 comprises a plurality of iron core rings 11 which are sequentially arranged from left to right, an end ring 20 at the left end is abutted with one iron core ring 11 at the leftmost end, and an end ring 20 at the right end is abutted with one iron core ring 11 at the rightmost end. Each core ring 11 is provided with a guide groove 111, the plurality of core rings 11 are provided with a plurality of guide grooves 111, and the plurality of guide grooves 111 on all the core rings 11 are sequentially communicated to form a channel 12. The guide bar 30 is inserted into the channel 12 along the left-right direction, the guide bar 30 penetrates through the iron core assembly 10, and the left end and the right end of the guide bar 30 are respectively connected with the two end rings 20, so that the assembly among the iron core assembly 10, the guide bar 30 and the end rings 20 is realized.

In this embodiment, the guide bar 30 is provided with a plurality of bosses 31 corresponding to the positions of the guide slots 111, and it can be understood that the number of the guide slots 111 is plural, the number of the bosses 31 is the same as the number of the guide slots 111, the number of the bosses 31 is plural, and the plurality of bosses 31 are sequentially arranged along the axial direction of the core assembly 10, that is, along the left-right direction. The left end ring 20 and the leftmost boss 31 are connected to each other to form a stepped structure 40, the right end ring 20 and the rightmost boss 31 are connected to each other to form the stepped structure 40, and any two adjacent bosses 31 are connected to each other to form the stepped structure 40. It is understood that the protrusion 31 may protrude from the guide bar 30 in the radial direction of the core assembly 10, may protrude from the guide bar 30 in the circumferential direction of the core assembly 10, or may protrude from the guide bar 30 in the radial direction of the core assembly 10 and protrude from the guide bar 30 in the circumferential direction of the core assembly 10. The protruding size and/or direction of any two adjacent bosses 31 are not uniform, so that a step structure 40 is formed in a staggered manner along the radial direction and/or the circumferential direction of the core assembly 10.

It can be understood that the stepped structure 40 has a stepped surface 41, and the stepped surface 41 can abut against the end surface of the core ring 11 on the same side of the stepped surface 41, so that the end surfaces of the guide bar 30 and the end ring 20 and the plurality of core rings 11 are abutted, thereby realizing mutual extrusion and pre-tightening of the guide bar 30 and the end ring 20 and the plurality of core rings 11, and further realizing sectional extrusion and pre-tightening of the guide bar 30 and the end ring 20 and the core assembly 10, so that when the motor rotor 100 rotates, the abutting surfaces between the core assembly 10 and the guide bar 30 and the end ring 20 will generate a friction force to counteract the centrifugal force, as shown by a linear arrow in fig. 4, the friction force restrains the guide bar 30 and the end ring 20, thereby overcoming the deformation of the guide bar 30 and the end ring 20 under the action of the centrifugal force, reducing the stress at the connection of the guide bar 30 and the end ring 20, avoiding the phenomenon of stress concentration, and further enhancing the mechanical strength at the connection of the guide bar 30 and the end ring 20, the risk of breaking the conducting bars 30 is eliminated, so that the motor rotor 100 can adapt to higher rotating speed working conditions.

The utility model discloses an among electric motor rotor 100, arbitrary two adjacent guide slots 111 overlap along the radial and/or circumference part of iron core subassembly 10, and boss 31 matches and inlays and locate in the guide slot 111 that corresponds with the shape of the guide slot 111 that corresponds. In an embodiment, as shown in fig. 2 to 5, any two adjacent guide slots 111 are overlapped along the radial portion of the core assembly 10, and since the bosses 31 are matched with the corresponding guide slots 111 in shape and are embedded in the corresponding guide slots 111, any two adjacent bosses 31 are overlapped along the radial portion of the core assembly 10, so that the two bosses 31 are distributed in a staggered manner to form the stepped surface 41 abutted to the end surface of each core ring 11, it can be understood that there is also an overlap between the end ring 20 and the boss 31 disposed close thereto to form the stepped surface 41 abutted to the end surface of the core ring 11 on the same side, thereby realizing the sectional type compression pretension of the guide bars 30 and the end ring 20 with the core assembly 10.

In another embodiment, any two adjacent guide grooves 111 are partially overlapped along the circumferential direction of the core assembly 10, so that any two adjacent bosses 31 are partially overlapped along the circumferential direction of the core assembly 10, thereby realizing two distribution staggered distributions to form the stepped surface 41 abutted to the end surface of each core ring 11, and there is also an overlap between the end ring 20 and the boss 31 disposed near thereto to form the stepped surface 41 abutted to the end surface of the core ring 11 on the same side, thereby realizing the sectional type extrusion pretension of the guide bars 30 and the end ring 20 with the core assembly 10.

In yet another embodiment, any two adjacent guide grooves 111 are partially overlapped in the radial direction and the circumferential direction of the core assembly 10, so that any two adjacent bosses 31 are partially overlapped in the radial direction and the circumferential direction of the core assembly 10, thereby realizing that the two bosses 31 are distributed in a staggered manner to form a stepped surface 41 abutted against the end surface of each core ring 11, and there is also an overlap between the end ring 20 and the boss 31 disposed near thereto to form a stepped surface 41 abutted against the end surface of the core ring 11 on the same side, thereby realizing the sectional type extrusion pretension of the guide bars 30 and the end ring 20 with the core assembly 10.

In one embodiment, the guide slots 111 are closed slots and are located near the outer edge of the core ring 11. The guide groove 111 is a closed groove, and performs all-round restraint on the outer edge of the guide bar 30, thereby improving the assembly stability of the guide bar 30 and the iron core assembly 10. In addition, the guide groove 111 is a closed groove, so that the magnetic field harmonic of the motor rotor 100 is smaller, the NVH performance is better, and the using effect of the motor is improved. In addition, the conducting bar 30 embedded in the guiding groove 111 is close to the outer edge of the core ring 11, so that the linear velocity of the motor rotor 100 can be improved, and the high-speed motion of the motor rotor 100 can be realized.

Further, the length direction of guide slot 111 is the same with the radial direction of iron core subassembly 10, the width direction of guide slot 111 is the same with the circumference direction of iron core subassembly 10, and the width size of guide slot 111 is the convergent setting along the direction of being close to iron core ring 11 inner edge, namely, the width of guide slot 111 reduces gradually along the direction of being close to iron core subassembly 10 axle center, the cross sectional shape of conducting bar 30 then matches with the shape of guide slot 111, then the width of the cross section of conducting bar 30 reduces gradually along the direction of being close to iron core subassembly 10 axle center, can guarantee the abundant contact between conducting bar 30 and the iron core ring 11, and contact reliability and stability are higher, strengthen the joint strength between conducting bar 30 and the iron core subassembly 10, in addition, still, the magnetic flux line distribution of motor rotor 100 is more smooth, avoid the local magnetic flux saturation condition.

As shown in fig. 4 and 5, in one embodiment, any two adjacent guide grooves 111 are aligned at an end near the outer edge of the core ring 11, and one of the guide grooves 111 has a length greater than that of the other guide groove 111, so that the outer edges of the bars 30 inserted into the plurality of guide grooves 111 are flush, and the inner edges thereof are uneven, forming a plurality of step structures 40. It is understood that the bosses 31 are formed at the inner edge of the bar conductors 30, and the protruding lengths of any adjacent two bosses 31 in the radial direction of the core assembly 10 are not uniform. Further, the protruding lengths of the two bosses 31 distributed on the left and right sides of any one of the bosses 31 may be uniform, so that the inner edge of the conducting bar 30 forms an alternate concave-convex shape along the axial direction of the core assembly 10.

In another embodiment, two ends of any two adjacent guide grooves 111 are aligned respectively, and on the same radial line of the core assembly 10, the width of one guide groove 111 is greater than that of the other guide groove 111, so that the outer edges and the inner edges of the guide bars 30 penetrating through the plurality of guide grooves 111 are flush, and two sides of the width direction thereof are uneven, thereby forming a plurality of step structures 40. It is understood that the bosses 31 are formed on both sides of the bar 30 in the width direction, and the width of any adjacent two bosses 31 is not uniform. Further, the widths of the two bosses 31 distributed on the left and right sides of any boss 31 may be the same, so that the two sides of the width direction of the conducting bar 30 form an alternate concave-convex shape along the axial direction of the core assembly 10.

In still another embodiment, the inner and outer edges in the length direction of the bar 30 and both ends in the width direction thereof may be formed in an alternating concavo-convex shape. The shape of the conducting bar 30 of the present invention can be flexibly set according to the actual situation, and is not limited herein.

As shown in fig. 6 and 7, in an embodiment, each core ring 11 is formed by sequentially stacking a plurality of punching sheets 112 in an axial direction of the core assembly 10, each punching sheet 112 is provided with a punching hole 1121, and the plurality of punching holes 1121 of all the punching sheets 112 are sequentially communicated to form the guide groove 111. Specifically, the core ring 11 is formed by stamping and stacking a plurality of silicon steel sheets, so that the resistance of the core ring 11 is increased, the eddy current of the core ring 11 is reduced, and the motor efficiency is improved. The punching sheets 112 have a plurality of punched holes 1121, and the punched holes 1121 are sequentially communicated along the axial direction of the core assembly 10 to form a guide groove 111, which is beneficial to realizing the assembly with the guide bar 30.

In one embodiment, in each core ring 11, a plurality of punched holes 1121 are arranged to face each other to form a guide groove 111 having a straight bar shape in accordance with the axial extension direction of the core assembly 10. It is understood that the circular corners of the plurality of punched holes 1121 are the same so as to form the straight-bar-shaped bosses 31, and the plurality of bosses 31 are sequentially connected to the straight-bar-shaped lead 30 so as to facilitate the manufacturing of the lead 30.

In another embodiment, in each core ring 11, the plurality of punched holes 1121 are sequentially staggered in the circumferential direction of the core assembly 10 to form an arc-shaped guide groove 111 extending in the circumferential direction of the core assembly 10. It can understand, the central angle of a plurality of punches a hole 1121 can be the gradual change setting for a plurality of punches a hole 1121 along the crisscross distribution in proper order of the circumference of iron core subassembly 10, form the curved guide slot 111 that is along the circumference extension of iron core subassembly 10, and then form along the curved boss 31 that is along the circumference extension of iron core subassembly 10, a plurality of bosses 31 connect gradually for being spiral around establishing the conducting bar 30 in iron core subassembly 10, do benefit to the start-up torque and the smoothness nature that improve the motor.

In an embodiment, each core ring 11 is provided with a plurality of guide grooves 111, the plurality of guide grooves 111 are arranged at intervals along the circumferential direction of the core ring 11, the number of the guide grooves 111 on all the core rings 11 is consistent and the plurality of channels 12 are communicated in a one-to-one correspondence manner, and one guide bar 30 penetrates through each channel 12. It is understood that the number of the bars 30 is plural, and the plural bars 30 are arranged at intervals along the circumference of the core assembly 10 to form the squirrel cage motor rotor 100 of the high speed asynchronous.

As shown in fig. 1 to 7, among the plurality of core rings 11, a plurality of core rings 11 are first core rings 11a, the remaining core rings are second core rings 11b, the plurality of first core rings 11a are spaced apart along the axial direction of the core assembly 10, a second core ring 11b is disposed between any two adjacent first core rings 11a, the guide groove 111 of the first core ring 11a is a first guide groove 111a, the guide groove 111 of the second core ring 11b is a second guide groove 111b, and the first guide groove 111a of the first core ring 11a and the second guide groove 111b of the second core ring 11b are identical in number, distribution and shape, and are not identical only in length. Specifically, the ends of the first guide groove 111a and the second guide groove 111b near the outer edge of the core ring 11 are aligned, the length of the second guide groove 111b is greater than that of the first guide groove 111a, the boss 31 corresponding to the first guide groove 111a is the first boss 31a, the boss 31 corresponding to the second guide groove 111b is the second boss 31b, and the protruding length of the second boss 31b is greater than that of the first boss 31a, so that the inner edge of the guide bar 30 forms a plurality of stepped structures 40. The punching sheet of the first iron core ring 11a is a first punching sheet 112a, the punching sheet arranged on the first punching sheet 112a is a first punching sheet 1121a, the punching sheet of the second iron core ring 11b is a second punching sheet 112b, and the punching sheet arranged on the second punching sheet 112b is a second punching sheet 1122 b.

In the electric motor rotor 100 of the present invention, the conducting bars 30 may be fixed to the end rings 20 by welding or integral casting. The bars 30 and end rings 20 may be copper or aluminum to form a copper motor rotor 100 or an aluminum motor rotor 100. The copper motor rotor 100 has high conductivity and excellent electromagnetic performance, the aluminum motor rotor 100 has the advantages of small casting process difficulty and low cost, and the aluminum motor rotor 100 has low porosity, good dynamic balance effect and high manufacturing yield.

The utility model discloses still provide a motor, the motor includes as above electric motor rotor 100. The specific structure of the motor rotor 100 in the motor refers to the above embodiments, and since the motor adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims (10)

1. An electric machine rotor, comprising:

the two ends of the iron core assembly are respectively provided with two end rings, the iron core assembly comprises a plurality of iron core rings which are sequentially arranged along the axial direction of the iron core assembly, the end rings are abutted against the iron core rings which are arranged close to the end rings, each iron core ring is provided with a guide groove, and the guide grooves of all the iron core rings are sequentially communicated to form a channel;

the guide bar penetrates through the channel to penetrate through the iron core assembly, two ends of the guide bar are respectively connected with the two end rings, and a boss is formed on the guide bar at a position corresponding to each guide groove; the end ring with be close to its setting between the boss, and arbitrary adjacent two interconnect and follow between the boss the radial and/or the crisscross distribution of circumference of iron core subassembly form stair structure, stair structure's ladder surface with rather than the homonymy the terminal surface butt of iron core ring.

2. The electric machine rotor as claimed in claim 1, wherein any two adjacent guide grooves partially overlap in a radial direction and/or a circumferential direction of the core assembly, and the bosses are matched with the corresponding guide grooves in shape and are embedded in the corresponding guide grooves.

3. The electric machine rotor as recited in claim 2, wherein the guide slots are closed slots and are located proximate an outer edge of the core ring.

4. The electric machine rotor as recited in claim 3, wherein a length direction of the guide groove coincides with a radial direction of the core assembly, a width direction of the guide groove coincides with a circumferential direction of the core assembly, and a width dimension of the guide groove is tapered in a direction approaching an inner edge of the core ring.

5. An electric motor rotor as recited in claim 4, wherein any adjacent two of said channels are aligned proximate an end of said core ring outer edge, and wherein one of said channels has a greater length than the other of said channels.

6. The electric machine rotor as recited in claim 4, wherein two ends of any adjacent two of the guide slots are aligned respectively and on a same radial line of the core assembly, wherein a width of one of the guide slots is greater than a width of the other of the guide slots.

7. The electric machine rotor as claimed in any one of claims 1 to 6, wherein each of the core rings is formed by sequentially laminating a plurality of punched sheets in an axial direction of the core assembly, each of the punched sheets is provided with a punched hole, and the plurality of punched holes of all the punched sheets are sequentially communicated to form the guide groove.

8. The electric motor rotor as claimed in claim 7, wherein a plurality of said punched holes are arranged in opposed relation in each of said core rings to form said guide grooves in a straight bar shape in accordance with an axial extension direction of said core assembly;

alternatively, the first and second electrodes may be,

in each iron core ring, a plurality of punched holes are distributed in a staggered mode in sequence along the circumferential direction of the iron core assembly so as to form the arc-shaped guide groove extending along the circumferential direction of the iron core assembly.

9. The electric motor rotor as claimed in any one of claims 1 to 6, wherein each of the core rings is provided with a plurality of the guide grooves, the plurality of guide grooves are arranged at intervals along the circumferential direction of the core ring, the guide grooves on all the core rings are consistent in number and are communicated with one another in a one-to-one correspondence manner to form a plurality of the channels, and one guide bar is inserted into each of the channels.

10. An electrical machine, characterized in that the electrical machine comprises an electrical machine rotor according to any of claims 1-9.

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