CN114142635B - Stator core, stator and motor - Google Patents

Abstract

The invention relates to a stator core, a stator and a motor, wherein the stator core is designed into a split type outer part and an inner part, the inner part is designed into an inner cylinder and at least two winding blocks which are arranged in the inner cylinder at intervals, namely, the outer side of a formed winding groove is an opening, and the inner side of the formed winding groove is a closed opening. The method is beneficial to changing the traditional extrapolation winding technology, so that the continuous wave winding is not limited by the size limit of the iron core; and simultaneously, the slot filling rate and the end coil height are effectively improved. In addition, because first conflict face and the second conflict face that has the contained angle setting on the first location portion, third conflict face and the fourth conflict face that has the contained angle setting on the second location portion, consequently, first location portion and the cooperation of second location portion utilize two sets of conflict faces that become the contained angle setting, make it spacing more stable, can effectively avoid inner part and outer part cooperation shakiness and easily take place to become flexible, are favorable to improving the operating performance of motor.

Description

Stator core, stator and motor

Technical Field

The invention relates to the technical field of motors, in particular to a stator core, a stator and a motor.

Background

The existing flat wire continuous wave winding forming technology is generally that a cylindrical wave winding is placed in the inner diameter of a stator core; and then the cylindrical wave winding is pushed into the stator core slot from the inside to the inside of the slot. Because it is an extrapolation technique, it is universally applicable to large-sized cores.

CN105164901A discloses a method for manufacturing a stator for a rotating electric machine, which can smoothly perform the arrangement of the final coil arranged at the last of the teeth even if the circumferential width of the base end side portion of the teeth is increased.

For the small-size iron core of the A-level or B-level vehicle, the inner hole of the iron core is too small to be suitable for the flat continuous wave winding forming technology; at the same time, the slot fill factor and the end package height are also limited. For this purpose, an improvement of the winding external winding technique has been proposed, and a split core adapted thereto has been proposed. However, the split type iron core is limited by the defects of the traditional split type iron core structure design, so that the inner iron core and the outer iron core are not stably matched, the looseness is easy to occur, and the operation performance of the motor is seriously influenced.

Disclosure of Invention

Therefore, it is necessary to provide a stator core, a stator and a motor, which can improve the slot filling rate and the end portion coil height, and simultaneously, can stably position the stator core, and ensure the stable operation performance of the motor.

A stator core, comprising: the inner wall of the outer part is provided with a first positioning part in an extending mode along the axial direction of the cavity, the first positioning part is at least provided with a first collision surface and a second collision surface, and the first collision surface and the second collision surface form an included angle; the inner part is sleeved in the cavity and comprises an inner cylinder and a plurality of winding blocks arranged at intervals along the circumferential direction of the inner cylinder, a winding groove is formed between any two adjacent winding blocks and the inner cylinder, and one end, far away from the inner cylinder, of each winding groove is an opening; at least one end of the winding block, which is far away from the inner barrel, is provided with a second positioning part in positioning fit with the first positioning part, the second positioning part is provided with a third abutting surface abutting against the first abutting surface and a fourth abutting surface abutting against the second abutting surface, and the third abutting surface and the fourth abutting surface form an included angle.

The stator core is designed into a split type outer part and an inner part, the inner part is designed into an inner cylinder and at least two winding blocks arranged on the inner cylinder at intervals, namely, the outer side of a formed winding groove is an opening, and the inner side is a closed opening, so that a continuous wave winding can be inserted from one end of the winding block back to the inner cylinder in winding; or, directly winding on the winding block, etc.; after winding, the inner part is sleeved in the cavity, and the second positioning part is matched with the first positioning part in a positioning mode, so that the inner part is stably combined with the outer part. Therefore, the stator core is designed to be split, the inner side of the inner part is in a closed groove shape, and the traditional extrapolation winding technology is changed, so that the continuous wave winding forming is not limited by the size limit of the core; and simultaneously, the slot filling rate and the end coil height are effectively improved. In addition, because have the first conflict face and the second conflict face that become the contained angle setting on the first location portion, have the third conflict face and the fourth conflict face that become the contained angle setting on the second location portion, consequently, first location portion and the cooperation of second location portion utilize the conflict face that two sets of contained angles set up, make its spacing more stable, can effectively avoid inner part and outer part cooperation shakiness and easily take place to become flexible, are favorable to improving the operating performance of motor.

In one embodiment, one of the first positioning portion and the second positioning portion is a positioning protrusion, and the other is a positioning groove which is in positioning fit with the positioning protrusion.

In one embodiment, an intersection line of the first abutting surface and the second abutting surface defines a first positioning line, an intersection line of the third abutting surface and the fourth abutting surface defines a second positioning line, and the first positioning line and the second positioning line are in abutting fit.

In one embodiment, the outer member comprises at least two separate segments, all of the separate segments are sequentially spliced around to form the cavity, and the first positioning portion is arranged on one side surface of at least one of the separate segments facing the cavity.

In one embodiment, the stator core includes a connecting member, one of the two adjacent segment sections is provided with a first inserting portion, the other is provided with a second inserting portion which is inserted and matched with the first inserting portion, and any two adjacent segment sections are connected through the connecting member.

In one embodiment, one of the first insertion part and the second insertion part is a slot, and the other one of the first insertion part and the second insertion part is an insertion projection matched with the slot.

In one embodiment, between any two adjacent segment sections, a first groove extending in the axial direction of the cavity is formed in the insertion projection of one segment section, a second groove extending in the axial direction of the cavity is formed in the other segment section, the second groove is communicated with the insertion groove, the insertion projection is inserted into the insertion groove, the first groove is communicated with the second groove, and the connecting piece is pressed into the first groove and the second groove respectively.

In one embodiment, the number of the first positioning portions and the number of the second positioning portions are at least two, the at least two first positioning portions are arranged at intervals along the circumferential direction of the cavity, and the second positioning portions and the winding blocks are arranged in a one-to-one correspondence manner.

In one embodiment, the outer member includes at least two outer core segments, and the at least two outer core segments are sequentially spliced along an axial direction of the cavity.

In one embodiment, the inner member includes at least two inner core segments, and at least two inner core segments are sequentially spliced in an axial direction of the inner barrel.

In one embodiment, all the winding blocks are arranged on the inner cylinder along the direction around the axis of the inner cylinder and are bent towards the same direction.

In one embodiment, two opposite side surfaces of the winding block facing the winding grooves on two sides respectively define a first arc surface and a second arc surface, the first arc surface is convexly and convexly curved on the winding block, and the second arc surface is concavely and convexly curved on the winding block.

A stator comprising the stator core of any one of the above.

The stator adopts the stator core and is designed into a split type outer part and an inner part, the inner part is designed into an inner cylinder and at least two winding blocks arranged in the inner cylinder at intervals, namely, the outer side of a formed winding groove is an opening, and the inner side is a closed opening, so that a continuous wave winding can be inserted from one end of the winding block back to the inner cylinder in the winding process; or, directly winding on the winding block, etc.; after winding, the inner part is sleeved in the cavity, and the second positioning part is matched with the first positioning part in a positioning mode, so that the inner part is stably combined with the outer part. Therefore, the stator core is designed to be split, the inner side of the inner part is in a closed slot shape, and the traditional extrapolation winding technology is changed, so that the continuous wave winding forming is not limited by the size limitation of the core; and simultaneously, the slot filling rate and the end coil height are effectively improved. In addition, because first conflict face and the second conflict face that has the contained angle setting on the first location portion, third conflict face and the fourth conflict face that has the contained angle setting on the second location portion, consequently, first location portion and the cooperation of second location portion utilize two sets of conflict faces that become the contained angle setting, make it spacing more stable, can effectively avoid inner part and outer part cooperation shakiness and easily take place to become flexible, are favorable to improving the operating performance of motor.

An electrical machine comprising a stator as described above.

The motor adopts the stator core, and is designed into a split type outer part and an inner part, and the inner part is designed into an inner cylinder and at least two winding blocks arranged on the inner cylinder at intervals, namely, the outer side of a formed winding groove is an opening, and the inner side is a closed opening, so that a continuous wave winding can be inserted from one end of the winding block back to the inner cylinder in the winding process; or, directly winding on the winding block, etc.; after winding, the inner part is sleeved in the cavity, and the second positioning part is matched with the first positioning part in a positioning mode, so that the inner part is stably combined with the outer part. Therefore, the stator core is designed to be split, the inner side of the inner part is in a closed slot shape, and the traditional extrapolation winding technology is changed, so that the continuous wave winding forming is not limited by the size limitation of the core; and simultaneously, the slot filling rate and the end coil height are effectively improved. In addition, because first conflict face and the second conflict face that has the contained angle setting on the first location portion, third conflict face and the fourth conflict face that has the contained angle setting on the second location portion, consequently, first location portion and the cooperation of second location portion utilize two sets of conflict faces that become the contained angle setting, make it spacing more stable, can effectively avoid inner part and outer part cooperation shakiness and easily take place to become flexible, are favorable to improving the operating performance of motor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

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

FIG. 1 is a schematic view of a stator core structure according to an embodiment;

FIG. 2 is a schematic view of the inner member construction in accordance with one embodiment;

FIG. 3 is a schematic view of the outer member construction in accordance with one embodiment;

FIG. 4 is an exploded view of the outer member structure according to one embodiment;

FIG. 5 is a first diagram illustrating a split-block configuration according to an embodiment;

fig. 6 is a second schematic view of a split-section structure according to an embodiment.

100. A stator core; 110. an outer member; 111. a first positioning portion; 1111. a first abutting surface; 1112. a second interference surface; 1113. a first positioning line; 1114. positioning a groove; 112. a segmented section; 1121. a first insertion part; 1122. a second insertion part; 1123. inserting and connecting the bulges; 1124. a slot; 1125. a first groove; 1126. a second groove; 113. an outer core segment; 114. a cavity; 120. an inner member; 121. an inner barrel; 122. a winding block; 1221. a first arc surface; 1222. a second arc surface; 123. a second positioning portion; 1231. a third interference surface; 1232. a fourth interference surface; 1233. a second positioning line; 1234. positioning a projection; 125. a winding slot; 130. a connecting member.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In one embodiment, referring to fig. 1, fig. 2 and fig. 3, a stator core 100 includes: the outer part 110 is internally provided with a cavity 114, the inner wall of the outer part 110 is provided with a first positioning part 111 extending along the axial direction of the cavity 114, the first positioning part 111 is at least provided with a first collision surface 1111 and a second collision surface 1112, and the first collision surface 1111 and the second collision surface 1112 form an included angle; the inner member 120 is disposed in the cavity 114, the inner member 120 includes an inner tube 121 and a plurality of winding blocks 122 spaced along a circumferential direction of the inner tube 121, and a winding groove 125 is formed between any two adjacent winding blocks 122 and the inner tube 121. One end of the winding groove 125 far from the inner cylinder 121 is open. One end of the at least one winding block 122, which is away from the inner cylinder 121, is provided with a second positioning portion 123, which is in positioning fit with the first positioning portion 111, the second positioning portion 123 is provided with a third collision surface 1231, which collides with the first collision surface 1111, and a fourth collision surface 1232, which collides with the second collision surface 1112, and the third collision surface 1231 and the fourth collision surface 1232 form an included angle.

The stator core 100 is designed as the split type outer member 110 and the split type inner member 120, and the inner member 120 is designed as the inner tube 121 and at least two winding blocks 122 spaced apart from the inner tube 121, that is, the outer side of the formed winding groove 125 is open, and the inner side is closed, so that the continuous wave winding can be inserted from the winding block 122 to the end of the inner tube 121 during winding; or, winding directly on the winding block 122, etc.; after winding, the inner member 120 is sleeved in the cavity 114, and the second positioning portion 123 is positioned and matched with the first positioning portion 111, so that the inner member 120 and the outer member 110 are stably combined. Thus, the stator core 100 is designed to be split and the inner side of the inner part 120 is in a closed slot shape, so that the traditional extrapolation winding technology is changed, and the continuous wave winding forming is not limited by the size limitation of the core; and simultaneously, the slot filling rate and the end coil height are effectively improved. In addition, because the first positioning portion 111 is provided with the first abutting surface 1111 and the second abutting surface 1112 which are arranged at an included angle, and the second positioning portion 123 is provided with the third abutting surface 1231 and the fourth abutting surface 1232 which are arranged at an included angle, the first positioning portion 111 and the second positioning portion 123 are matched, and two sets of abutting surfaces which are arranged at an included angle are utilized, so that the spacing is more stable, the inner member 120 and the outer member 110 are effectively prevented from being unstably matched and easily loosened, and the running performance of the motor is favorably improved. Wherein, the groove full rate is: as the continuous wave winding is pushed into winding block 122, the continuous wave winding occupies all of the space between winding block 122 and winding block 122.

It should be noted that, in the present embodiment, the included angles between the first abutting surface 1111 and the second abutting surface 1112 and between the third abutting surface 1231 and the fourth abutting surface 1232 are designed respectively, so that when the first positioning portion 111 and the second positioning portion 123 are engaged, the two positioning portions all receive the abutting force at the included angle, thereby effectively limiting the left and right looseness of the two positioning portions, and ensuring the stable engagement between the first positioning portion 111 and the second positioning portion 123. In addition, the first collision surface 1111 and the second collision surface 1112 arranged at an included angle, and the third collision surface 1231 and the fourth collision surface 1232 arranged at an included angle enable the first positioning portion 111 and the second positioning portion 123 to be matched with each other more easily, and the requirement on the processing precision is not high. Such as: in an allowable machining error, if an included angle between the third interference surface 1231 and the fourth interference surface 1232 is slightly larger than an included angle between the first interference surface 1111 and the second interference surface 1112, the first positioning portion 111 can be stably engaged with the second positioning portion 123, and the like, so that stable engagement between the inner member 120 and the outer member 110 can be greatly ensured.

The included angle between the first collision surface 1111 and the second collision surface 1112, and the included angle between the third collision surface 1231 and the fourth collision surface 1232 are selected in various ways, and can be determined according to the actual product and the user's requirements.

In addition, the first collision surface 1111 and the second collision surface 1112 form an included angle therebetween, but the two collision surfaces do not necessarily intersect with each other, for example: the first collision surface 1111 and the second collision surface 1112 can be designed into a trapezoid structure with two waist edges. Meanwhile, the first abutting surface 1111 and the second abutting surface 1112 may be both planar surfaces or curved surfaces. When the first collision surface 1111 and the second collision surface 1112 are both curved surfaces, an included angle between the first collision surface 1111 and the second collision surface 1112 can be determined by taking tangent lines of the first collision surface and the second collision surface. Similarly, the third interference surface 1231 and the fourth interference surface 1232 form an included angle therebetween, but do not mean that the two surfaces intersect, for example: a trapezoidal two-waist structure can be designed between the third interference surface 1231 and the fourth interference surface 1232. Meanwhile, the third collision surface 1231 and the fourth collision surface 1232 may be both planar surfaces or curved surfaces. When the third collision surface 1231 and the fourth collision surface 1232 are both curved surfaces, the included angle between the third collision surface and the fourth collision surface can be determined by taking the tangent lines of the third collision surface and the fourth collision surface.

It should be noted that "circumferential direction of the inner cylinder 121" is understood as: around the axis of the inner cylinder 121. Since the winding block 122 is provided at an interval on the outer surface of the inner tube 121, the inside of the formed winding groove 125 is closed, that is, the winding groove 125 has a closed groove structure with respect to the inner tube 121. In addition, in the actual design, the inner cylinder 121 and the winding block 122 can be designed as an integral structure.

Further, referring to fig. 2 and fig. 3, one of the first positioning portion 111 and the second positioning portion 123 is a positioning protrusion 1234, and the other is a positioning groove 1114 positioned and engaged with the positioning protrusion 1234. Therefore, the first positioning portion 111 can be the positioning protrusion 1234, and the second positioning portion can be the positioning groove 1114; alternatively, the first positioning portion 111 can be the positioning slot 1114, and the second positioning can be the positioning protrusion 1234. Thus, the positioning protrusions 1234 and the positioning grooves 1114 are structurally matched, so that the first positioning portions 111 and the second positioning portions 123 are stably combined, and the structural stability of the stator core 100 is improved.

Further, referring to fig. 2 and fig. 3, the first positioning portion 111 is a positioning groove 1114, and the second positioning portion 123 is a positioning protrusion 1234. Meanwhile, the first collision surface 1111 and the second collision surface 1112 are respectively two opposite groove walls of the positioning groove 1114; the third interference surface 1231 and the fourth interference surface 1232 are respectively opposite sides of the positioning protrusion 1234.

It should be noted that the positioning groove 1114 may be designed to extend from one end surface of the outer member 110 to the other end surface of the outer member 110 along the axial direction of the cavity 114; of course, it may not extend to the other end surface of the outer member 110. So configured, when the inner member 120 is nested within the cavity 114, the inner member 120 may be inserted from one end of the outer member 110 to push the locating protrusions 1234 along the locating grooves 1114 into the outer member 110.

In one embodiment, referring to fig. 2 and fig. 3, an intersection line of the first collision surface 1111 and the second collision surface 1112 defines a first positioning line 1113. The intersection line of the third interference surface 1231 and the fourth interference surface 1232 is defined as a second positioning line 1233. The first alignment line 1113 is abutted against the second alignment line 1233. Therefore, when the first positioning portion 111 and the second positioning portion 123 are engaged, the first abutting surface 1111 and the second abutting surface 1112 are respectively abutted against the third abutting surface 1231 and the fourth abutting surface 1232, and the first positioning line 1113 is abutted against the second positioning line 1233, that is, the first positioning portion 111 and the second positioning portion 123 have at least three different directions for being stressed when engaged, so that the engagement between the two is more stable. In addition, in the present embodiment, the bottom of the first positioning portion 111 and the bottom of the second positioning portion 123 are designed to be in line contact, so that on the premise of ensuring stable combination of the two, the occupied space of the combining surface between the first positioning portion 111 and the second positioning portion 123 in the stator core 100 is reduced, the effective space of the winding is increased, and thus, the performance of the motor is improved.

Specifically, referring to fig. 2 and fig. 3, the first positioning portion 111 and the second positioning portion 123 are both in a tooth-shaped structure, such as: the first positioning portion 111 is a toothed positioning protrusion 1234, and the second positioning portion 123 is a toothed positioning slot 1114.

In one embodiment, referring to fig. 4, the outer member 110 includes at least two separate segments 112. All of the segment sections 112 are sequentially spliced around to form the cavity 114, i.e., the outer member 110 is of a circumferentially split multi-segment design. At least one of the segment sections 112 is provided with a first positioning portion 111 on a side facing the cavity 114. In positioning engagement, each of the segmented segments 112 may be individually engaged outside of inner member 120; the individual segment sections 112 are then joined together in a loop, which avoids the inner member 120 around which the windings are wound being pushed or inserted into the outer member 110. In addition, the outer member 110 is designed to be circumferentially split, so that the first positioning portion 111 in the outer member 110 can be conveniently machined, and the machining efficiency and the machining precision can be improved.

Alternatively, the connection between the split sections 112 and the split sections 112 may be, but is not limited to, bolting, snapping, riveting, pinning, etc.

Additionally, in other embodiments, the outer member 110 may also be a unitary structure, i.e., a circumferentially complete structure.

Further, referring to fig. 4, the stator core 100 includes a connecting member 130. Between any two adjacent segment sections 112, one of the segment sections 112 is provided with a first inserting part 1121, and the other is provided with a second inserting part 1122 inserted and matched with the first inserting part 1121, and any two adjacent segment sections 112 are connected through a connecting member 130. Therefore, the split sections 112 are matched with the split sections 112 in a manner of first inserting and then connecting. In the assembling process, the first inserting-connecting part 1121 and the second inserting-connecting part 1122 between the respective segment sections 112 are respectively matched, so that the respective segment sections 112 are preformed to have an annular structure; the two adjacent segment sections 112 are connected by the connecting members 130 to complete the splicing of the outer member 110.

Specifically, referring to fig. 5 and fig. 6, on the same divided section 112, a first inserting portion 1121 is disposed on one side of the divided section 112, and a second inserting portion 1122 is disposed on the other side.

In an embodiment, referring to fig. 5 and fig. 6, one of the first mating part 1121 and the second mating part 1122 is a slot 1124, and the other is a mating protrusion 1123 engaged with the slot 1124. That is, the first mating part 1121 may be a slot 1124, and the second mating part 1122 may be a mating protrusion 1123; alternatively, the first mating part 1121 may be a mating protrusion 1123, and the second mating part 1122 may be a slot 1124. In this way, the mating between the individual segment sections 112 is facilitated by the mating of the mating protrusion 1123 with the slot 1124.

Specifically, referring to fig. 5 and fig. 6, the first mating portion 1121 may be a slot 1124, and the second mating portion 1122 may be a mating protrusion 1123.

Further, referring to fig. 5 and 6, between any two adjacent segment sections 112, a first groove 1125 extending along the axial direction of the cavity 114 is disposed on the insertion protrusion 1123 of one segment section 112, and a second groove 1126 extending along the axial direction of the cavity 114 is disposed on the other segment section 112. The second recess 1126 communicates with the slot 1124. The insertion protrusion 1123 is inserted into the insertion groove 1124, and the first recess 1125 communicates with the second recess 1126. The connector 130 is pressed into the first and second recesses 1125 and 1126, respectively. It follows that, during the splicing process, the plugging protrusion 1123 of one segment 112 is inserted into the insertion slot 1124 of the other segment 112, so that the first groove 1125 on the plugging protrusion 1123 communicates with the second groove 1126 on the segment 112; next, the connecting member 130 is pressed into the first and second recesses 1125 and 1126, respectively, so that the connection between the adjacent two segment sections 112 is stabilized.

It should be noted that pressing the connecting member 130 into the first and second recesses 1125 and 1126, respectively, should be understood as: the connecting member 130 is in interference fit with the first recess 1125 and the second recess 1126 respectively, that is, when the connecting member 130 is pressed into the first recess 1125 and the second recess 1126, the connecting member 130 can be tightly combined with the groove wall of the first recess 1125 and the groove wall of the second recess 1126. Of course, in order to improve the combining strength between the connecting member 130 and the first and second grooves 1125 and 1126, the first and second grooves 1125 and 1126 may be designed to have a dovetail structure, and the connecting member 130 may be designed to have a dovetail structure.

It should also be noted that the axial extension of the first recess 1125 along the cavity 114 is understood as: the first recess 1125 extends in a direction coinciding with the axial trend of the cavity 114, such as: the first recess 1125 may extend parallel to the axial direction of the cavity 114, or may have a certain angle of intersection. Likewise, the axial extension of the second groove 1126 along the cavity 114 should be understood as: the extension direction of the second groove 1126 coincides with the axial trend of the cavity 114, such as: the second groove 1126 may extend in a direction parallel to the axial direction of the cavity 114, or may have an intersecting angle. To facilitate understanding of the axial direction of the cavity 114, taking fig. 3 as an example, the axial direction of the cavity 114 is the direction indicated by any arrow S in fig. 3.

In one embodiment, referring to fig. 2 and fig. 3, at least two first positioning portions 111 and two second positioning portions 123 are provided. At least two first positioning portions 111 are provided at intervals in the circumferential direction of the cavity 114. The second positioning portions 123 are provided in one-to-one correspondence with the winding blocks 122, so that the coupling between the inner member 120 and the outer member 110 is more stable.

In one embodiment, the outer member 110 includes at least two outer core segments 113. At least two outer iron core segments 113 are sequentially spliced along the axial direction of the cavity 114, so that the whole structure of the outer part 110 is broken into parts, the integral forming difficulty of the outer part 110 is simplified, and the forming efficiency and yield of the structure of the outer part 110 are improved.

Of course, in other embodiments, the outer member 110 may be a unitary structure, i.e., the outer member 110 may be a complete ring structure.

In one embodiment, the inner member 120 includes at least two inner core segments. At least two inner core segments are sequentially spliced along the axial direction of the inner cylinder 121. Similarly, the whole structure of the inner part 120 is broken into parts, the whole forming difficulty of the inner part 120 is simplified, and the forming efficiency and yield of the structure of the inner part 120 are improved.

Likewise, in other embodiments, the inner member 120 may also be a unitary structure, i.e., the inner member 120 is a complete ring-shaped structure.

In one embodiment, referring to fig. 2, all the winding blocks 122 are disposed on the inner cylinder 121 along a direction around the axis of the inner cylinder 121 and are bent toward the same direction. Therefore, the winding blocks 122 of the present embodiment are all arc-shaped structures, so that the winding is more conveniently pushed into the winding slots 125, which is beneficial to improving the assembly efficiency. The shape of the winding block 122 may be any non-linear arc-shaped structure.

Further, referring to fig. 2, two opposite side surfaces of the winding block 122 facing the winding slots 125 on two sides are defined as a first arc surface 1221 and a second arc surface 1222. The first cambered surface 1221 is convexly and convexly curved on the winding block 122. The second curved surface 1222 is concavely curved on the winding block 122. That is, the first arc surface 1221 is a convex arc surface, and the second arc surface 1222 is a concave arc surface, so that the winding is more easily pushed into the winding slot 125.

It should be noted that the arc curvatures of the first arc 1221 and the second arc 1222 may be equal or unequal. When the arc curvatures of the first arc surface 1221 and the second arc surface 1222 are equal, the winding slot 125 has an equal slot width structure.

In one embodiment, referring to fig. 1, a stator includes the stator core 100 in any of the above embodiments.

The stator described above, which uses the above stator core 100, is designed as the split type outer part 110 and the inner part 120, and the inner part 120 is designed as the inner tube 121 and at least two winding blocks 122 provided at intervals on the inner tube 121, that is, the outer side of the inner part 120 is an open slot structure, so that, in the winding, the continuous wave winding can be inserted from one end of the winding block 122 facing away from the inner tube 121; or, winding directly on the winding block 122, etc.; after winding, the inner member 120 is sleeved in the cavity 114, and the second positioning portion 123 is positioned and matched with the first positioning portion 111, so that the inner member 120 and the outer member 110 are stably combined. Thus, the stator core 100 is designed to be split and the outer side of the inner part 120 is in an open groove shape, so that the traditional extrapolation winding technology is changed, and the continuous wave winding forming is not limited by the size limitation of the core; and simultaneously, the slot filling rate and the end coil height are effectively improved. In addition, because the first positioning portion 111 has the first collision surface 1111 and the second collision surface 1112 which are arranged at an included angle, and the second positioning portion 123 has the third collision surface 1231 and the fourth collision surface 1232 which are arranged at an included angle, the first positioning portion 111 and the second positioning portion 123 cooperate with each other, and the two sets of collision surfaces which are arranged at an included angle are utilized to make the position limitation more stable, thereby effectively avoiding the problem that the inner part 120 and the outer part 110 are not stably cooperated and are easy to loosen, and being beneficial to improving the operation performance of the motor.

In one embodiment, please refer to fig. 1, an electric machine includes the stator in the above embodiments.

The motor is designed as the split type outer part 110 and the split type inner part 120 by using the above stator core 100, and the inner part 120 is designed as the inner cylinder 121 and at least two winding blocks 122 arranged at intervals on the inner cylinder 121, that is, the outer side of the inner part 120 is of an open slot structure, so that the continuous wave winding can be inserted from one end of the winding block 122 back to the inner cylinder 121 in the winding; or, winding directly on the winding block 122, etc.; after winding, the inner member 120 is sleeved in the cavity 114, and the second positioning portion 123 is positioned and matched with the first positioning portion 111, so that the inner member 120 and the outer member 110 are stably combined. Thus, the stator core 100 is designed to be split and the outer side of the inner part 120 is in an open groove shape, so that the traditional extrapolation winding technology is changed, and the continuous wave winding forming is not limited by the size limitation of the core; and simultaneously, the slot filling rate and the end coil height are effectively improved. In addition, because the first positioning portion 111 is provided with the first abutting surface 1111 and the second abutting surface 1112 which are arranged at an included angle, and the second positioning portion 123 is provided with the third abutting surface 1231 and the fourth abutting surface 1232 which are arranged at an included angle, the first positioning portion 111 and the second positioning portion 123 are matched, and two sets of abutting surfaces which are arranged at an included angle are utilized, so that the spacing is more stable, the inner member 120 and the outer member 110 are effectively prevented from being unstably matched and easily loosened, and the running performance of the motor is favorably improved.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (5)

1. A stator core, characterized in that the stator core comprises:

the outer part is internally provided with a cavity, a first positioning part is arranged on the inner wall of the outer part along the axial extension of the cavity, the first positioning part is a positioning groove, the positioning groove extends from one end surface of the outer part along the axial extension of the cavity and does not extend to the other end surface of the outer part, the first positioning part is at least provided with a first collision surface and a second collision surface, and the first collision surface and the second collision surface are arranged at an included angle;

the inner part is sleeved in the cavity and comprises an inner cylinder and a plurality of winding blocks arranged at intervals along the circumferential direction of the inner cylinder, a winding groove is formed between any two adjacent winding blocks and the inner cylinder, one end of the winding groove, far away from the inner cylinder, is an opening, and the inner side of the winding groove is a closed opening;

a second positioning portion which is in positioning fit with the first positioning portion is arranged at one end, away from the inner cylinder, of the at least one winding block, the second positioning portion is a positioning protrusion, the first positioning portion and the second positioning portion are both in a tooth-shaped structure, a third abutting surface abutting against the first abutting surface and a fourth abutting surface abutting against the second abutting surface are arranged on the second positioning portion, an included angle is formed between the third abutting surface and the fourth abutting surface and is larger than an included angle between the first abutting surface and the second abutting surface, an intersection line of the first abutting surface and the second abutting surface is defined as a first positioning line, an intersection line of the third abutting surface and the fourth abutting surface is defined as a second positioning line, and the first positioning line and the second positioning line are in abutting fit;

the outer part comprises at least two sub-body sections, all the sub-body sections are sequentially spliced in a surrounding manner to form the cavity, the stator core comprises a connecting piece, a first inserting part is arranged between any two adjacent sub-body sections, a second inserting part which is in inserting fit with the first inserting part is arranged on the other one of the two sub-body sections, any two adjacent sub-body sections are connected through the connecting piece, one of the first inserting part and the second inserting part is a slot, the other one of the first inserting part and the second inserting part is an inserting projection which is in inserting fit with the slot, a first groove which is arranged along the axial direction of the cavity is arranged on the inserting projection of one sub-body section between any two adjacent sub-body sections, a second groove which is arranged along the axial direction of the cavity is arranged on the other sub-body section, the second groove is communicated with the slot, and the inserting projection is inserted into the slot, the first groove is communicated with the second groove, the first groove and the second groove are in dovetail groove structures, the connecting piece is in a dovetail structure, the connecting piece is pressed into the first groove and the second groove respectively, and the connecting piece is in interference fit with the first groove and the second groove respectively;

all the winding blocks are arranged on the inner barrel along the direction around the axis of the inner barrel in a bending mode and face the same direction, the winding blocks are of arc-shaped structures, two opposite side faces, facing the winding grooves on two sides, of the winding blocks are defined as a first arc face and a second arc face respectively, the first arc face is a convex arc face, the winding blocks are arranged in a convex bending mode, the second arc face is a concave arc face, and the winding blocks are arranged in a concave bending mode;

in the winding process, a continuous wave winding is inserted from one end of a winding block back to the inner cylinder; after winding, the inner part is sleeved in the cavity, and the second positioning part is matched with the first positioning part in a positioning way.

2. The stator core as claimed in claim 1 wherein at least one of the segments has the first detent on a side facing the cavity.

3. The stator core according to any one of claims 1 to 2, wherein the number of the first positioning portions and the number of the second positioning portions are at least two, the at least two first positioning portions are arranged at intervals in the circumferential direction of the cavity, and the second positioning portions are arranged in one-to-one correspondence with the winding blocks;

the outer part comprises at least two outer iron core sections which are sequentially spliced along the axial direction of the cavity;

the inner part comprises at least two inner iron core sections which are sequentially spliced along the axial direction of the inner barrel.

4. A stator, characterized in that it comprises a stator core according to any one of claims 1-3.

5. An electrical machine, characterized in that it comprises a stator according to claim 4.

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