CN108521180B - Rotor of motor and motor with same - Google Patents

Abstract

The invention discloses a rotor of a motor and the motor with the same, the rotor of the motor comprises: the first main iron core and the second main iron core, the outer peripheral surface of the first main iron core is provided with a plurality of first inclined slots, and the outer peripheral surface of the second main iron core is provided with a plurality of second inclined slots; the cage winding comprises a first sub-part, a second sub-part and a connecting ring, wherein the first sub-part is matched with the first main iron core, the second sub-part is matched with the second main iron core, and the first sub-part is connected with the second sub-part through the connecting ring; the outer peripheral surface of the auxiliary iron core and two opposite end surfaces of the first main iron core and the second main iron core jointly define a ring groove for forming a connecting ring in the process of casting the cage winding. The rotor of the motor has the advantages of high working efficiency, good reliability and the like.

Description

Rotor of motor and motor with same

Technical Field

The invention relates to the technical field of motor manufacturing, in particular to a rotor of a motor and the motor with the rotor of the motor.

Background

In the motor in the related art, the connecting ring structure is arranged in the middle of the rotor, so that the rotor moment and electromagnetic performance of the motor can be improved to meet the working requirement of the motor, but the processing of the connecting ring structure is complex, so that the difficulty of the manufacturing process of the rotor is increased, the production efficiency is reduced, the mass production is difficult to realize, and the application of the motor is influenced.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the rotor of the motor, which has the advantages of high working efficiency, good reliability and the like.

The invention also provides a motor with the rotor of the motor.

To achieve the above object, an embodiment according to a first aspect of the present invention proposes a rotor of an electric machine, the rotor of the electric machine comprising: the first main iron core and the second main iron core, wherein the outer peripheral surface of the first main iron core is provided with a plurality of first inclined grooves, and the outer peripheral surface of the second main iron core is provided with a plurality of second inclined grooves; the cage winding comprises a first sub-part, a second sub-part and a connecting ring, wherein the first sub-part is matched with the first main iron core, the second sub-part is matched with the second main iron core, and the first sub-part and the second sub-part are connected through the connecting ring; at least one vice iron core, vice iron core centre gripping be in first main iron core with between the second main iron core with first main iron core with the second main iron core is spaced apart, the outer peripheral face of vice iron core and first main iron core with the opposite both ends face of second main iron core jointly prescribe a limit to be used for in the casting cage winding in-process form the annular of go-between, the go-between cooperates in the annular.

The rotor of the motor provided by the embodiment of the invention has the advantages of high working efficiency, good reliability and the like.

In addition, the rotor of the motor according to the above embodiment of the present invention may have the following additional technical features:

according to one embodiment of the present invention, the sub-cores are plural and stacked in the axial direction thereof.

According to one embodiment of the invention, the outer peripheral surface of each secondary core is provided with at least one positioning tooth, and the maximum number of positioning teeth through which a straight line parallel to the axis of the secondary core can pass is smaller than the number of secondary cores.

According to one embodiment of the invention, the projections of the positioning teeth on each adjacent two of the secondary cores in a plane parallel to the end faces of the secondary cores do not coincide.

According to one embodiment of the invention, the number of the auxiliary iron cores is two, and the projections of the positioning teeth on the two auxiliary iron cores in a plane parallel to the end surfaces of the auxiliary iron cores are not coincident.

According to another embodiment of the invention, the number of the auxiliary iron cores is three, and the projections of the positioning teeth on at most two auxiliary iron cores in a plane parallel to the end face of the auxiliary iron cores are coincident.

According to one embodiment of the invention, each positioning tooth is provided with at least one wire through hole communicated with the outer peripheral surface of the positioning tooth, and a part of the cage winding is matched in the wire through hole.

According to one embodiment of the invention, the number of wire vias on each of the positioning teeth is equal.

According to an embodiment of the present invention, the number of the first inclined grooves and the second inclined grooves is equal to or greater than the number of the wire passing holes.

According to one embodiment of the invention, the distance between the projections of each adjacent two of the positioning teeth is equal in a plane parallel to the end face of the secondary core.

According to an embodiment of the present invention, the number of the positioning teeth on each of the sub-cores is equal, and the distance between each adjacent two of the positioning teeth in the circumferential direction of each of the sub-cores is equal.

According to one embodiment of the present invention, the thickness of the secondary core is 3 mm or less.

According to one embodiment of the present invention, the diameter of the secondary core is equal to or smaller than the diameter of the slot bottom inscribed circle of the first chute and the second chute.

According to one embodiment of the invention, the first chute and the second chute are at the same minimum angle and are inclined at opposite angles to the axis of the secondary core.

According to an embodiment of the present invention, an end of the first chute toward the second main core is aligned with an end of the second chute toward the first main core in the axial direction of the sub core.

According to another embodiment of the present invention, an end of the first diagonal groove facing the second main core is offset from an end of the second diagonal groove facing the first main core in the axial direction of the sub core.

An embodiment according to a second aspect of the invention proposes an electric machine comprising a rotor of an electric machine according to an embodiment of the first aspect of the invention.

According to the motor disclosed by the embodiment of the invention, the rotor of the motor disclosed by the embodiment of the first aspect of the invention has the advantages of high working efficiency, good reliability and the like.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural view of a rotor of an electric motor according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a rotor of an electric motor according to an embodiment of the present invention.

Fig. 3 is an exploded view of a rotor of an electric machine according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of a rotor of an electric machine according to one embodiment of the invention.

Fig. 5 is a cross-sectional view of a rotor of an electric machine according to another embodiment of the present invention.

Fig. 6 is a cross-sectional view of a rotor of an electric machine according to another embodiment of the present invention.

Fig. 7 is a cross-sectional view of a rotor of an electric machine according to another embodiment of the present invention.

Fig. 8 is a schematic structural view of a sub-core of a rotor of an electric motor according to another embodiment of the present invention.

Fig. 9 is a schematic structural view of a sub-core of a rotor of an electric motor according to another embodiment of the present invention.

Fig. 10 is a schematic structural view of a sub-core of a rotor of an electric motor according to another embodiment of the present invention.

Fig. 11 is a schematic structural view of a sub-core of a rotor of an electric motor according to another embodiment of the present invention.

Fig. 12 is a partially exploded view of a rotor of an electric machine according to another embodiment of the present invention.

Fig. 13 is a partially exploded view of a rotor of an electric machine according to another embodiment of the present invention.

Fig. 14 is a partially exploded view of a rotor of an electric machine according to another embodiment of the present invention.

Fig. 15 is a partially exploded view of a rotor of an electric machine according to another embodiment of the present invention.

Reference numerals: the rotor 1 of the motor, the first main iron core 110, the first chute 111, the second main iron core 120, the second chute 121, the cage winding 200, the first sub-portion 210, the first end ring 211, the first diagonal rod 212, the second sub-portion 220, the second end ring 221, the second diagonal rod 222, the connecting ring 230, the auxiliary iron core 300, the positioning teeth 320, and the wire passing hole 321.

Detailed Description

Embodiments of the present invention 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 invention.

A rotor 1 of an electric machine according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 15, a rotor 1 of an electric motor according to an embodiment of the present invention includes a first main core 110, a second main core 120, a cage winding 200, and a sub-core 300.

The first main core 110 has a plurality of first inclined grooves 111 on its outer circumferential surface, and the second main core 120 has a plurality of second inclined grooves 121 on its outer circumferential surface. The cage winding 200 includes a first sub-portion 210, a second sub-portion 220, and a connection ring 230, the first sub-portion 210 being coupled to the first main core 110, the second sub-portion 220 being coupled to the second main core 120, the first sub-portion 210 and the second sub-portion 220 being connected by the connection ring 230. At least one sub-core 300 is clamped between the first and second main cores 110 and 120 to space the first and second main cores 110 and 120 apart, and outer circumferential surfaces of the sub-core 300 and opposite end surfaces of the first and second main cores 110 and 120 together define a ring groove for forming the connection ring 230 during casting of the cage winding 200, in which the connection ring 230 is fitted. It will be appreciated herein that the first and second diagonal slots 111, 121 may be filled with liquid metal during casting to form the first and second sub-portions 210, 220, with the first sub-portion 210 being formed to mate with the first main core 110 and the second sub-portion 220 being formed to mate with the second main core 120.

According to the rotor 1 of the motor of the embodiment of the present invention, the outer circumferential surface of the sub-core 300 and the opposite end surfaces of the first main core 110 and the second main core 120 together define the ring groove for forming the connection ring 230 during casting of the cage winding 200 by providing at least one sub-core 300. In this way, the casting forming of the connection ring 230 can be directly completed in the casting process of the cage winding 200, which is convenient for manufacturing and forming of the connection ring 230, is convenient for simplifying the production process of the connection ring 230, is convenient for simplifying the production and manufacturing process of the rotor 1, is convenient for improving the production efficiency of the rotor 1, and reduces the production cost of the rotor 1, thereby being convenient for improving the production efficiency of the motor and reducing the production cost of the motor.

Also, the ring groove structure is formed by the outer circumferential surface of the sub-core 300 and the opposite end surfaces of the first and second main cores 110 and 120, so that the connection ring 230 of a complete closed loop can be formed in the casting process. Because the connection ring 230 is a complete closed-loop structure, by arranging the connection ring 230, the moment and electromagnetic performance of the rotor 1 can be prevented from being reduced due to the arrangement of the first chute 111 and the second chute 121, the force performance characteristic of the motor can be conveniently ensured, the moment of the rotor 1 can be increased, the rotor 1 can smoothly work, and the electromagnetic performance of the rotor 1 can be conveniently improved, so that the working reliability and stability of the rotor 1 can be conveniently improved, and the overall working performance of the motor can be improved.

Therefore, the rotor 1 of the motor according to the embodiment of the present invention has advantages of high working efficiency, good reliability, and the like.

The rotor 1 of an electric machine according to an embodiment of the present invention is described below with reference to the accompanying drawings.

In some embodiments of the present invention, as shown in fig. 1 to 15, a rotor 1 of an electric machine according to an embodiment of the present invention includes a first main core 110, a second main core 120, a cage winding 200, and a sub-core 300.

Specifically, the sub-cores 300 are plural and stacked in the axial direction thereof. For example, as shown in fig. 12 to 15, the sub-cores 300 may be two or three. Thus, the thickness of the connection ring 230 can be changed by changing the number of the stacked sub-cores 300, so that different thickness requirements of the connection ring 230 can be satisfied, the connection ring 230 with different thickness can be formed, and the processing flexibility of the connection ring 230 can be improved.

More specifically, the thicknesses of the plurality of sub-cores 300 may be the same, which facilitates the manufacturing process of the sub-cores 300.

For example, the first main core 110, the second main core 120, and the sub-core 300 may be stamping parts formed by punching silicon steel strips, and the thicknesses of the first main core 110 and the second main core 120 may be the same. In the process, the first main core 110 having the first inclined groove 111 may be first punched, then the sub-core 300 is punched, the punching process of the plurality of sub-cores 300 is performed by rotating a certain angle, and finally the second main core 120 having the second inclined groove 121 is punched. Thus, the first main core 110, the second main core 120 and the auxiliary core 300 may be formed by one-time stamping, so that the production and processing of the rotor 1 are facilitated, and the production efficiency of the rotor 1 is improved.

Specifically, as shown in fig. 7 to 11, the outer circumferential surface of each sub-core 300 is provided with at least one positioning tooth 320, and the maximum number of positioning teeth 320 through which a straight line parallel to the axis of the sub-core 300 can pass is smaller than the number of sub-cores 300. That is, at least one positioning tooth 320 is not overlapped with other positioning teeth 320 at a certain position in the circumferential direction of the sub-core 300. So that during casting, liquid metal can pass through and fill the location of the positioning teeth 320 to form a complete closed loop connection ring 230. Therefore, the positioning teeth 320 can be utilized to position the set position of the auxiliary iron core 300, so that the positioning accuracy and reliability of the auxiliary iron core 300 can be improved, the connecting ring 230 can be ensured to be a complete closed loop, and the working efficiency of the motor can be further improved. Meanwhile, by arranging the positioning teeth 320, the contact area between the auxiliary iron core 300 and the first main iron core 110 and the second main iron core 120 can be increased, the binding force between the auxiliary iron core 300 and the main iron core is improved, and the structure of the rotor 1 is firmer and more reliable.

More specifically, as shown in fig. 12 to 15, the projections of the positioning teeth 320 on each adjacent two of the sub-cores 300 in a plane parallel to the end surfaces of the sub-cores 300 do not coincide. In this way, the two adjacent positioning teeth 320 are not overlapped, so that the stress distribution on the connecting ring 230 is more uniform, the influence on the use of the connecting ring 230 caused by the occurrence of a stress concentration area is avoided, the structural strength of the connecting ring 230 is conveniently improved, and the structural reliability and stability of the connecting ring 230 are improved.

According to one embodiment of the present invention, the number of the sub-cores 300 is two, and the projections of the positioning teeth 320 on the two sub-cores 300 in a plane parallel to the end surfaces of the sub-cores 300 are not coincident. This not only facilitates adjusting the thickness of the connection ring 230, but also may provide a more uniform stress distribution across the connection ring 230.

According to another embodiment of the present invention, the number of the sub-cores 300 is three, and the projections of the positioning teeth 320 on at most two sub-cores 300 in a plane parallel to the end surfaces of the sub-cores 300 coincide. This not only ensures that the connection ring 230 is formed as a complete closed loop, but also prevents the use of the connection ring 230 from being affected by the occurrence of stress concentration areas.

Alternatively, as shown in fig. 7 to 9, at least one wire passing hole 321 communicating with the outer circumferential surface of the positioning teeth 320 is provided on each positioning tooth 320, and a portion of the cage winding 200 is fitted into the wire passing hole 321. Thus, the wire passing holes 321 can play a role in positioning, so that the forming precision of the cage winding 200 is conveniently improved, and the structural accuracy of the rotor 1 is conveniently improved.

Specifically, the number of via holes 321 on each positioning tooth 320 is equal. This facilitates positioning of the structure of the rotor 1 by means of the wire vias 321, which facilitates improving the structural uniformity of the cage winding 200.

Alternatively, the number of the first inclined grooves 111 and the second inclined grooves 121 is equal to or greater than the number of the via holes 321. This facilitates the installation of the sub-core 300, and facilitates the assembly molding of the sub-core 300 with the first and second main cores 110 and 120.

For example, the cage winding 200 may be an aluminum casting, the first main core 110 is provided with a first chute 111, the second main core 120 is provided with a second chute 121, the wire passing hole 321 is axially aligned with the first chute 111 and the second chute 121, and the wire passing hole 321, the first chute 111, and the second chute 121 are integrally filled when the cage winding 200 is cast. In this way, the rotor coil can be cast in the via hole 321, which is convenient for the formation of the cage winding 200, and because the cage winding 200 can cut the magnetic force lines of the motor stator magnetic field to induce electromotive force and current, the charged conductor will generate motion in the magnetic field, so that the rotor 1 can rotate relative to the motor stator, and the electric energy is converted into the rotating mechanical energy of the motor.

Specifically, as shown in fig. 4 and 5, the distance between projections of each adjacent two positioning teeth 320 is equal in a plane parallel to the end face of the sub-core 300. Specifically, the number of the sub-cores 300 may be plural, each sub-core 300 may have a plurality of positioning teeth 320, and the shape of each positioning tooth 320 may be the same or different. For example, each of the sub-cores 300 has the same shape and is of a central symmetrical structure, and each adjacent two of the sub-cores 300 are rotated by the same angle when stacked. This facilitates improving the thickness uniformity of the connection ring 230, facilitating making the stress of the connection ring 230 more uniform, and further improving the structural reliability and stability of the connection ring 230.

More specifically, the number of the positioning teeth 320 on each sub-core 300 is equal, and the distance between each adjacent two of the positioning teeth 320 in the circumferential direction of each sub-core 300 is equal. This facilitates improving the machining efficiency of the sub-core 300, and facilitates improving the uniformity of the assembly of the sub-core 300, thereby facilitating improving the dynamic balance characteristics and the electromagnetic force direction uniformity of the rotor 1.

It will be appreciated by those skilled in the art that the thicknesses of the plurality of sub-cores 300 may also be different, and the shapes of the plurality of sub-cores 300 may also be different. Thus, unbalance amount generated in the production process of the rotor 1 is improved, structural stability of the rotor 1 is improved, and working performance of the rotor is further improved.

Alternatively, the outer diameters of the first and second main cores 110 and 120 may be equal, and the maximum outer diameter of the positioning teeth 320 of the sub-core 300 may be equal to the outer diameters of the first and second main cores 110 and 120. The positioning in the casting process is convenient, the casting forming of the rotor 1 is convenient, and the structural accuracy and reliability of the rotor 1 are convenient to ensure.

According to an embodiment of the present invention, the plurality of sub-cores 300 have the same thickness and shape, and the plurality of positioning teeth 320 on each sub-core 300 are uniformly distributed along the circumferential direction of the sub-core 300. This facilitates simplifying the process of the sub-core 300, facilitating making the performance balance of the rotor 1 better, and facilitating improving the dynamic balance characteristics and electromagnetic force directional uniformity of the rotor 1.

In some embodiments of the present invention, the shape of each positioning tooth 320 may be the same. For example, as shown in fig. 4, the sub-cores 300 are two, each sub-core 300 has four positioning teeth 320, the distance between projections of each adjacent two positioning teeth 320 is equal in a plane parallel to the end face of the sub-core 300, the shape of each positioning tooth 320 is the same, and each positioning tooth 320 has one wire passing hole 321.

As shown in fig. 7, the sub-core 300 has four positioning teeth 320, the distances between two adjacent positioning teeth 320 are equal, each positioning tooth 320 has the same shape, and each positioning tooth 320 has one wire passing hole 321.

As shown in fig. 5, the number of the sub-cores 300 is two, each sub-core 300 has six positioning teeth 320, each positioning tooth 320 is a rectangular tooth having the same shape, the distance between the projections of each adjacent two rectangular teeth is equal in a plane parallel to the end face of the sub-core 300, the width of the rectangular tooth is smaller than the distance between the adjacent two chute edges, and the rectangular tooth is located between the adjacent two chute edges.

As shown in fig. 11, the sub-core 300 has three positioning teeth 320, the distances between adjacent two positioning teeth 320 being equal, each positioning tooth 320 being a rectangular tooth of the same shape.

Of course, the positioning teeth 320 on each sub-core 300 may also be different. For example, as shown in fig. 6, the sub-cores 300 are two, each sub-core 300 has two positioning teeth 320, the distances between projections of the two positioning teeth 320 are different in a plane parallel to the end surfaces of the sub-cores 300, the shapes of the two positioning teeth 320 are also different, one of the two positioning teeth 320 of the sub-cores 300 has three via holes 321 and four via holes 321, respectively, and the two positioning teeth 320 of the other sub-core 300 has two via holes 321 and three via holes 321, respectively.

As shown in fig. 8, the sub-core 300 has two positioning teeth 320, the distances between the two positioning teeth 320 are equal, each positioning tooth 320 has a different shape, one positioning tooth 320 has two wire through holes 321, and the other positioning tooth 320 has three wire through holes 321.

As shown in fig. 9, the sub-core 300 has two positioning teeth 320, the distances between the two positioning teeth 320 are equal, each positioning tooth 320 has a different shape, one positioning tooth 320 has three wire through holes 321, and the other positioning tooth 320 has four wire through holes 321.

As shown in fig. 10, the sub-core 300 has two positioning teeth 320, the distances between the two positioning teeth 320 are equal, the two positioning teeth 320 are different in shape and each consist of a plurality of rectangular teeth, one of the positioning teeth 320 has four rectangular teeth, and the other positioning tooth 320 has five rectangular teeth.

This may increase the contact area by increasing the tooth structure of the positioning teeth 320 or reduce the cost by decreasing the tooth structure of the positioning teeth 320. Meanwhile, the smaller the number of the positioning teeth 320, the larger the tooth structure of the positioning teeth 320, the larger the contact area of the single tooth positioning teeth 320 with the first main iron core 110 or the second main iron core 120, the stronger the binding force between the sub iron core 300 and the main iron core, and thus the risk of the positioning teeth 320 tilting can be reduced.

Specifically, the number of the positioning teeth 320 uniformly distributed on the sub-core 300 is smaller than the number of the inclined grooves on the first and second main cores 110 and 120.

Alternatively, the thickness of the sub-core 300 is 3 mm or less. It should be understood herein that the thickness refers only to the thickness of the sub-core 300 itself, and does not include other structures additionally provided thereon. This allows the sub-core 300 to have a reasonable size, thereby allowing the connection ring 230 to have a reasonable thickness.

Specifically, the diameter of the sub-core 300 is equal to or smaller than the diameter of the groove bottom inscribed circle of the first and second inclined grooves 111 and 121. It should be understood herein that the "diameter of the sub-core 300" means a diameter excluding the positioning teeth 320. That is, the root diameter of the sub-core 300 is equal to or less than the root diameters of the first and second main cores 110 and 120, that is, the diameter of the portion of the sub-core 300 excluding the positioning teeth 320 is equal to or less than the diameter of a circle where the first and second main cores 110 and 120 are tangent to the bottoms of all the diagonal grooves. In other words, the sub-core 300 does not include the outer circumferential edge of the positioning teeth 320 not to exceed the groove bottom of the chute in the radial direction. Thus, the shielding of the auxiliary iron core 300 to the first chute 111 and the second chute 121 can be avoided, the formation of the cage winding 200 is further facilitated, the reliable rotation of the rotor 1 can be ensured during operation, and the auxiliary iron core 300, the first main iron core 110 and the second main iron core 120 can be conveniently completed by one-time punching of a high-punching die.

Alternatively, as shown in fig. 1 and 2, the first and second inclined grooves 111 and 121 have the same minimum angle with respect to the axis of the sub-core 300 and opposite inclination angles. Through setting up inclination opposite chute like this, can make rotor 1 produce two opposite and symmetrical axial force of direction after the circular telegram, make it can offset each other, be convenient for reduce rotor 1's additional torque, be convenient for reduce rotor 1's mechanical wear, be convenient for improve the working property of motor, be convenient for improve the efficiency of motor, be convenient for prolong the life of motor. Thus, the torque force of the rotor 1 can be improved so as to improve the working efficiency of the rotor 1, thereby improving the working efficiency of the motor, and the electromagnetic harmonic force of the rotor 1 can be reduced, thereby reducing the noise generated by the motor, improving the noise reduction capability of the motor and improving the use comfort of a user.

According to one embodiment of the present invention, as shown in fig. 1, an end of the first chute 111 facing the second main core 120 is aligned with an end of the second chute 121 facing the first main core 110 in the axial direction of the sub-core 300. Therefore, the resistance of filling the first chute 111 and the second chute 121 during casting forming can be reduced, so that the cage winding 200 can be smoothly cast and formed, and the structure of filling the first chute 111 and the second chute 121 can be more continuous and tidy during casting the cage winding 200, so that the structural strength of the cage winding 200 is improved, the structural strength of the rotor 1 is improved, and the structure of the rotor 1 is more stable and reliable.

And, by aligning the end of the first chute 111 facing the second main core 120 and the end of the second chute 121 facing the first main core 110 in the axial direction of the sub-core 300, the magnetic field distribution on the rotor 1 can be more uniform, and the rotor 1 can be rotated relative to the stator of the motor due to the interaction of the rotor 1 and the stator of the motor, thereby improving the stability and uniformity of the rotation of the rotor 1, facilitating the stable conversion of the electric energy into the mechanical energy of the rotation of the motor, and facilitating the improvement of the performance of the motor.

According to another embodiment of the present invention, an end of the first tapered groove 111 facing the second main core 120 is offset from an end of the second tapered groove 121 facing the first main core 110 in the axial direction of the sub-core 300. For example, the first inclined grooves 111 are uniformly distributed on the first main core 110, the second inclined grooves 121 are uniformly distributed on the second main core 120, the distance between two adjacent first inclined grooves 111 is equal to the distance between two adjacent second inclined grooves 121, and the distance by which one end of the first inclined groove 111 facing the second main core 120 is staggered from one end of the second inclined groove 121 facing the first main core 110 in the axial direction of the sub-core 300 is smaller than half the distance between two adjacent first inclined grooves 111. Thus, the precision requirement of the rotor 1 can be reduced, the processing, manufacturing and assembling of the first main iron core 110 and the second main iron core 120 are facilitated, the processing efficiency of the rotor 1 is improved, the production cost of the rotor 1 is reduced, the assembling efficiency of the rotor 1 is improved, and the assembling cost of the rotor 1 is reduced. Meanwhile, because the motor has manufacturing deviation or electromagnetic design defects, the first chute 111 and the second chute 121 are staggered, so that the influence of the manufacturing deviation or the electromagnetic design defects on the rotor 1 can be reduced, the working reliability of the rotor 1 is further convenient to ensure, the working efficiency of the rotor 1 is further convenient to improve, and the noise generated by the motor is further convenient to reduce.

Alternatively, as shown in fig. 3, the first sub-portion 210 of the cage winding 200 includes a first end ring 211 and a plurality of first diagonal rods 212, the second sub-portion 220 includes a second end ring 221 and a plurality of second diagonal rods 222, the first end ring 211, the second end ring 221 and the connection ring 230 are parallel, the first end ring 211 is connected to the connection ring 230 through the plurality of first diagonal rods 212, the second end ring 221 is connected to the connection ring 230 through the plurality of second diagonal rods 222, and the first end ring 211, the second end ring 221, the connection ring 230, the plurality of first diagonal rods 212 and the plurality of second diagonal rods 222 are integrally cast. Specifically, the first end ring 211 and the second end ring 221 have equal thicknesses, and the connection ring 230 has a thickness smaller than the thicknesses of the first end ring 211 and the second end ring 221.

An electric motor according to an embodiment of the present invention is described below. The motor according to the embodiment of the present invention includes the rotor 1 of the motor according to the above-described embodiment of the present invention.

The motor according to the embodiment of the invention has the advantages of high working efficiency, good reliability and the like by utilizing the rotor 1 of the motor according to the embodiment of the invention.

Other constructions and operation of the motor according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, 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 invention will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (17)

1. A rotor for an electric machine, comprising:

the first main iron core and the second main iron core, wherein the outer peripheral surface of the first main iron core is provided with a plurality of first inclined grooves, and the outer peripheral surface of the second main iron core is provided with a plurality of second inclined grooves;

the cage winding comprises a first sub-part, a second sub-part and a connecting ring, wherein the first sub-part is matched with the first main iron core, the second sub-part is matched with the second main iron core, and the first sub-part and the second sub-part are connected through the connecting ring;

at least one vice iron core, vice iron core centre gripping be in first main iron core with between the second main iron core with first main iron core with the second main iron core is spaced apart, the outer peripheral face of vice iron core and first main iron core with the opposite both ends face of second main iron core jointly prescribe a limit to be used for in the casting cage winding in-process form the annular of go-between, the go-between cooperates in the annular.

2. The rotor of an electric machine according to claim 1, wherein the sub-cores are plural and stacked in an axial direction thereof.

3. The rotor of claim 2, wherein each of the sub-cores is provided with at least one positioning tooth on an outer circumferential surface thereof, and a maximum number of positioning teeth through which a straight line parallel to an axis of the sub-core can pass is smaller than the number of sub-cores.

4. A rotor for an electric machine according to claim 3, characterized in that the projections of the positioning teeth on each adjacent two of the secondary cores in a plane parallel to the end faces of the secondary cores do not coincide.

5. A rotor of an electric machine as claimed in claim 3, characterized in that the number of secondary cores is two, the projections of the positioning teeth on both secondary cores in a plane parallel to the end faces of the secondary cores being misaligned.

6. A rotor of an electric machine as claimed in claim 3, characterized in that the number of secondary cores is three, and that at most two of the positioning teeth on the secondary cores coincide in projection in a plane parallel to the end faces of the secondary cores.

7. A rotor of an electric machine as claimed in claim 3, wherein each of said positioning teeth is provided with at least one wire passing hole communicating with an outer peripheral surface of said positioning teeth, a portion of said cage winding being fitted in said wire passing hole.

8. The rotor of claim 7, wherein the number of wire vias on each of the positioning teeth is equal.

9. The rotor of claim 7, wherein the number of the first chute and the second chute is equal to or greater than the number of the wire passing holes.

10. The rotor of an electric machine according to claim 4, wherein the distance between projections of each adjacent two of the positioning teeth is equal in a plane parallel to an end face of the sub-core.

11. The rotor of an electric machine according to claim 10, wherein the number of said positioning teeth on each of said sub-cores is equal, and the distance between each adjacent two of said positioning teeth in the circumferential direction of each of said sub-cores is equal.

12. The rotor of an electric machine according to claim 1, wherein the thickness of the secondary core is 3 mm or less.

13. The rotor of claim 1, wherein the diameter of the secondary core is equal to or less than the diameter of the slot bottom inscribed circle of the first and second slots.

14. The rotor of claim 1, wherein the first chute and the second chute are at the same minimum angle and are inclined at opposite angles to the axis of the secondary core.

15. The rotor of an electric machine of claim 1, wherein an end of the first angled slot facing the second main core is aligned with an end of the second angled slot facing the first main core in an axial direction of the secondary core.

16. The rotor of an electric machine according to claim 1, wherein an end of the first chute toward the second main core is offset from an end of the second chute toward the first main core in an axial direction of the sub core.

17. An electric machine comprising a rotor of an electric machine according to any one of claims 1-16.