CN111293795A

CN111293795A - Stator, manufacturing method of stator, motor and fan

Info

Publication number: CN111293795A
Application number: CN201811492261.4A
Authority: CN
Inventors: 高伟; 李剑雄; 朱守民; 曾留山
Original assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Priority date: 2018-12-06
Filing date: 2018-12-06
Publication date: 2020-06-16

Abstract

The invention discloses a stator, a manufacturing method of the stator, a motor and a fan, wherein the stator comprises: the mounting structure comprises a yoke part, a mounting hole is formed in the yoke part, at least two fixing grooves are formed in the wall of the mounting hole in a recessed mode, and the fixing grooves are arranged at intervals along the circumferential direction of the mounting hole; and the tooth part is arranged in the mounting hole, the tooth part is provided with a central shaft hole and at least two pole bodies, the pole bodies are arranged at intervals along the circumferential direction of the central shaft hole, each pole body deviates from one end of the central shaft hole and is provided with an abutting part, the width of the abutting part is B, the width of the pole body is B, and the relation between B and B is as follows: b is larger than B, and the abutting part is in interference abutting joint with the fixing groove. The technical scheme of the invention aims to facilitate coil winding on the premise of reducing cost, reduce pole body vibration at the weak position of the stator tooth part and reduce noise.

Description

Stator, manufacturing method of stator, motor and fan

Technical Field

The invention relates to the field of motors, in particular to a stator, a manufacturing method of the stator, a motor with the stator and a fan.

Background

The traditional motor stator for household appliances mostly adopts an integral iron core structure, and the winding mode is divided into a distributed winding and a concentrated winding; the winding is distributed, an insulation system adopts slot paper and slot wedges, and a coil is pressed into a stator by hanging the wound coil on a tool; some manufacturers adopt a concentrated winding form and adopt an insulation frame for insulation, and the winding is wound in an inner winding machine, but the winding speed is low, the production efficiency is low, and the comprehensive cost of the motor is higher. In recent years, because the motor stator of the traditional integral iron core structure is low in production efficiency, high in cost, low in automation degree and the like, a plurality of motor manufacturers change the motor stator into a splicing block form, an insulation system is changed into an insulation frame which is inserted up and down or directly injected by the stator, a winding mode is changed from inner winding to outer winding, the production efficiency is greatly improved, and the cost is reduced. Meanwhile, after the stator tooth part is pressed into the yoke part, when the inner notch of the stator tooth part is cut, because the contact area of the tooth part and the yoke part is small, pole shoes at weak positions of the cut part of the stator tooth part can vibrate due to the alternation of a magnetic field generated by a coil after the motor is electrified, and accordingly, large noise is generated.

Disclosure of Invention

The invention mainly aims to provide a stator, which is convenient for winding coils on the premise of reducing cost, reduces the pole body vibration at the weak position of a stator tooth part and reduces noise.

To achieve the above object, the present invention provides a stator including:

the mounting structure comprises a yoke part, a mounting hole is formed in the yoke part, at least two fixing grooves are formed in the wall of the mounting hole in a recessed mode, and the fixing grooves are arranged at intervals along the circumferential direction of the mounting hole; and

tooth portion, tooth portion install in the mounting hole, tooth portion is equipped with central shaft hole and at least two pole bodies, the pole body is followed the circumference interval in central shaft hole sets up, each the pole body deviates from the one end in central shaft hole is equipped with butt portion, butt portion's width is B, pole body's width is B, B does with the relation of B: b is larger than B, and the abutting part is in interference abutting joint with the fixing groove.

Optionally, the abutting portion includes two first abutting sections extending along the width direction of the pole body, the two first abutting sections are arranged on two sides of the pole body relatively, the distance between the ends of the two first abutting sections is B, and the first abutting sections are in interference connection with the fixing grooves.

Optionally, the abutting portion includes the first abutting section that extends along the width direction of the pole body, the first abutting section set up in one side of the pole body, the tip of the first abutting section to the pole body deviate from the side interval of the first abutting section is B, the first abutting section with the fixed slot interference connection.

Optionally, the abutting portion is further provided with a second abutting portion, the second abutting portion is located between the two first abutting portions and extends along the length direction of the pole body, and the second abutting portion is in interference abutting with the fixing groove.

Optionally, the fixing groove comprises a first fixing groove section and a second fixing groove section, the first fixing groove section comprises a first inner side wall and a second inner side wall connected to the first inner side wall, and the first inner side wall is recessed to form the second fixing groove section;

the first abutting section abuts against the second inner side wall, and the second abutting section abuts against the second fixed groove section.

Optionally, a distance from the second inner sidewall to the outer side face of the tooth portion is L, a thickness of the first abutting section is L, and a relationship between L and L is: l is more than L.

Optionally, the stator includes a plurality of tooth portions stacked on each other along an axial direction of the central shaft hole, an end portion of each pole body facing away from the second abutting section extends inward to form two pole shoes, the pole shoes jointly enclose the central shaft hole, the pole shoes of two adjacent pole bodies are arranged adjacent to each other, and the stator further includes a connecting member connecting the pole bodies.

Optionally, the tooth further comprises:

the two adjacent pole bodies jointly enclose to form a tooth socket;

the slot wedge is inserted into the tooth groove and is abutted against the groove wall of the tooth groove, and part of the slot wedge extends out of the tooth groove along the axial direction of the central shaft hole;

and the coil bypasses two adjacent slot wedges and passes through two adjacent tooth slots.

Optionally, the slot wedge includes a flange extending from an end of the slot wedge protruding out of the tooth slot and abutting an outer surface of the tooth portion.

Optionally, the slot wedge includes a first insulating portion and a second insulating portion abutting against the first insulating portion, the first insulating portion is disposed around the slot and abuts against a slot wall of the slot, and the second insulating portion blocks a gap formed by two adjacent first abutting sections.

The invention also provides a method of manufacturing a stator, the method comprising any of the above stators, the stator comprising:

The manufacturing method of the stator comprises the following steps:

aligning a tooth portion with a mounting hole of the yoke portion;

and pressing the tooth part and the yoke part, and enabling the abutting part to be in interference abutment with the fixed groove.

Optionally, the step of aligning the tooth portion with the mounting hole of the yoke further comprises:

the slot wedge is turned over to form a turned edge, and then the slot wedge is inserted into the tooth slot;

and winding the stator by the coil in an outer winding and continuous winding mode.

The present invention also provides a motor including a stator and a rotor rotatably coupled to a central shaft hole of the stator, the stator including:

The invention also provides a fan which comprises a motor, wherein the motor comprises a stator and a rotor which is rotationally connected with the central shaft hole of the stator.

According to the technical scheme, the yoke part and the tooth part which are detachably connected with each other are arranged, so that the coil can be wound in an outward winding mode when being wound, the production efficiency is improved by the outward winding mode, and the cost is reduced. And, the rethread sets up the fixed slot to the mounting hole of yoke portion to and set up the butt portion with the utmost point body of tooth, because the width B of butt portion is greater than the width B of utmost point body, and butt portion butt fixed slot, so increased the area of contact of utmost point body and mounting hole, and then increased the area of contact of tooth portion and yoke portion, make the fixed effect of tooth portion and yoke portion better. Therefore, pole shoe vibration caused by magnetic field alternation generated by the coil after being electrified can be effectively reduced, and noise is reduced. Therefore, the technical scheme of the invention can facilitate the winding of the coil on the premise of reducing the cost, reduce the vibration of the pole shoe at the weak position of the stator tooth part and reduce the noise.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or exemplary techniques of the present invention, the drawings needed to be used in the description of the embodiments or exemplary techniques will be briefly introduced 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 a schematic structural diagram of a stator according to an embodiment of the present invention;

FIG. 2 is an exploded view of one embodiment of a stator of the present invention;

FIG. 3 is a schematic structural diagram of a tooth portion of an embodiment of a stator of the present invention;

FIG. 4 is a schematic diagram of a structure of a stator with a tooth portion having coils removed according to an embodiment of the present invention;

FIG. 5 is a schematic view of a tooth removing slot wedge of an embodiment of a stator of the present invention;

FIG. 6 is an exploded view of a tooth of an embodiment of a stator of the present invention;

FIG. 7 is a structural diagram of a tooth portion without pole shoes according to an embodiment of a stator of the present invention;

FIG. 8 is a top view of a tooth of an embodiment of a stator of the present invention;

FIG. 9 is a top view of an embodiment of a yoke portion of a stator of the present invention;

FIG. 10 is a top view of another embodiment of a yoke portion of a stator of the present invention;

FIG. 11 is a schematic view of a first insulating portion of a stator according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of an embodiment of a second insulating portion of a stator according to the present invention;

FIG. 13 is a top view of an exemplary prior art outer wound stator;

FIG. 14 is a schematic structural view of an exemplary prior art outer wound stator;

FIG. 15 is a schematic structural view of an exemplary in-line wound stator;

fig. 16 is a flow chart of a method for manufacturing a stator according to the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Stator	331	Abutting part
10	Yoke part	3311	First abutting section
				11	Mounting hole	3313	Second abutting section
111	Fixing groove	333	Pole shoe
				1111	First fixed groove section	35	Tooth socket
1111a	Second inner side wall	50	Slot wedge
				1113	Second fixed groove section	51	First insulating part
113	Stop part	511	Flanging
				30	Toothed section	53	Second insulating part
31	Central shaft hole	70	Coil
				33	Pole body	90	Connecting piece

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are 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 addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory 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 present invention provides a stator 100.

Referring to fig. 1 to 12, a stator 100 according to an embodiment of the present invention includes:

a yoke 10, wherein the yoke 10 is formed with a mounting hole 11, the hole wall of the mounting hole 11 is concavely formed with at least two fixing grooves 111, and the fixing grooves 111 are arranged at intervals along the circumferential direction of the mounting hole 11; and

a tooth portion 30, the tooth portion 30 being mounted to the mounting hole 11, the tooth portion 30 being provided with a central axial hole 31 and at least two pole bodies 33, the pole bodies 33 being arranged at intervals along a circumferential direction of the central axial hole 31, an abutting portion 331 being provided at an end of each pole body 33 away from the central axial hole 31, a width of the abutting portion 331 being B, a width of the pole body 33 being B, and a relationship between B and B being: b > B, and the abutting portion 331 is in interference contact with the fixing groove 111.

According to the technical scheme, the yoke part 10 and the tooth part 30 which are detachably connected with each other are arranged, so that the coil 70 can be wound in an outward winding mode, the outward winding mode of the coil 70 improves the production efficiency, and the cost is reduced. Furthermore, by providing the fixing groove 111 in the mounting hole 11 of the yoke 10 and providing the abutment portion 331 in the pole body 33 of the tooth portion 30, since the width B of the abutment portion 331 is larger than the width B of the pole body 33 and the abutment portion 331 abuts against the fixing groove 111, the contact area between the pole body 33 and the mounting hole 11 is increased, the contact area between the tooth portion 30 and the yoke 10 is increased, and the fixing effect between the tooth portion 30 and the yoke 10 is improved. In this way, the pole piece 333 vibration caused by the alternating magnetic field generated by the coil 70 after being energized can be effectively reduced, thereby reducing noise. Thus, the technical scheme of the invention can facilitate the winding of the coil 70 on the premise of reducing the cost, reduce the vibration of the pole shoe 333 at the weak position of the tooth part 30 of the stator 100 and reduce the noise.

In an embodiment of the present application, the outer circumferential profile of the yoke portion 10 is square, which is simple in structure and easy to manufacture, but in a specific application, the outer circumferential profile of the yoke portion 10 may be other shapes, such as an arc shape or a ring shape or other polygons. And the yoke portion 10 and the tooth portion 30 can be made of silicon steel sheets, and the silicon steel sheets are good in magnetic conductivity and poor in electric conductivity. The motor is operated by generating magnetic force through the windings of the coil 70. However, since the alternating magnetic field generates a current in the core, if the core has a high conductivity, it generates heat corresponding to a closed short circuit, which is called eddy current. Too much eddy current can cause the core temperature of the motor stator 100 to rise significantly, which can burn the motor in severe cases.

Referring to fig. 10, in an embodiment of the present invention, the fixing groove 111 may have a stopper portion 113 extending from a notch of the fixing groove 111, an outer side of the abutting portion 331 abuts against an inner groove wall of the fixing groove 111, and an inner side of the abutting portion 331 abuts against the stopper portion 113, so that a contact area between the fixing groove 111 and the abutting portion 331 is further increased, connection stability between the yoke 10 and the tooth portion 30 is further improved, and noise caused by vibration of the pole piece 333 is reduced.

It is understood that the tooth portion 30 includes at least two pole bodies 33, thereby forming at least two slots 35, and the coil 70 can pass through the slots 35 and be wound on the upper portions of the pole bodies 33. Of course, the number of the pole bodies 33 may also be 3, 4 or 8, and the specific number of the pole bodies 33 may be set according to actual needs, and each pole body 33 is correspondingly provided with the fixing groove 111, so that the abutting portions 331 of the pole bodies 33 and the fixing grooves 111 are abutted and fixed one by one.

The pole body 33 extends in the radial direction of the central axis hole 31, and the width B of the contact portion 331 is: the abutment 331 is perpendicular to the longest distance in the extension direction of its belonging pole body 33. The width b of the pole body 33 is: the distance between the two sides of the pole body 33. The specific dimensions of the abutment 331 and the pole body 33 are not limited herein, since the motors of different powers may be of different sizes.

Referring to fig. 8, in an embodiment of the present application, the abutting portion 331 includes two first abutting sections 3311 extending along a width direction of the pole body 33, the two first abutting sections 3311 are oppositely disposed at two sides of the pole body 33, a distance between ends of the two first abutting sections 3311 is B, and the first abutting sections 3311 are in interference connection with the fixing groove 111. It is understood that the width direction is perpendicular to the radial direction of the central axis hole 31, and the arrangement of the two first abutting sections 3311 can increase the contact area between the abutting portion 331 and the fixing groove 111. Of course, other abutting portions 331 may be added to the first abutting portion 3311, so as to further increase the contact area between the first abutting portion 3311 and the fixing groove 111, for example, a saw tooth structure may be added to the side of the first abutting portion 3311 or the side of the first abutting portion 3311 may be arranged in an arc, which may better increase the contact area between the first abutting portion 3311 and the fixing groove 111. In this embodiment, the width B of the abutting portion 331 is the distance between the ends of the two first abutting sections 3311, and the two first abutting sections 3311 can stabilize the structure of the pole body 33, and the connecting stability between the tooth portion 30 and the yoke portion 10 can be better increased due to the uniform stress.

In an embodiment of the present application, the abutting portion 331 includes the first abutting section 3311 extending along the width direction of the pole body 33, the first abutting section 3311 is disposed on one side of the pole body 33, the end of the first abutting section 3311 to the side distance of the pole body 33 departing from the first abutting section 3311 is B, the first abutting section 3311 is in interference connection with the fixing groove 111. In this embodiment, the first abutting section 3311 on the pole body 33 is disposed such that B is larger than B, and the disposing of the first abutting section 3311 can also increase the contact area between the abutting section 331 and the fixing groove 111, and save the manufacturing cost of the first abutting section 3311, thereby facilitating the use of the user.

Referring to fig. 3 to 8, in an embodiment of the present invention, the abutting portion 331 further includes a second abutting portion 3313, the second abutting portion 3313 is located between the two first abutting portions 3311 and extends along the length direction of the pole body 33, and the second abutting portion 3313 is in interference abutment with the fixing groove 111. In the present embodiment, the second abutting section 3313 is provided to further increase the contact area between the abutting portion 331 and the fixing groove 111, thereby further increasing the connection stability of the tooth portion 30 and the yoke portion 10, preventing the pole piece 333 from vibrating, and reducing noise. And, other abutting portions 331 may be further added to the second abutting portion 3313, so as to further increase the contact area between the second abutting portion 3313 and the fixing groove 111, for example, a saw tooth structure may be added to the side of the second abutting portion 3313 or the side of the second abutting portion 3313 may be arranged in an arc, which may better increase the contact area between the second abutting portion 3313 and the fixing groove 111.

In an embodiment of the present application, the fixing groove 111 includes a first fixing groove section 1111 and a second fixing groove section 1111, the first fixing groove section 1111 includes a first inner sidewall and a second inner sidewall 1111a connected to the first inner sidewall, the first inner sidewall being concavely formed into the second fixing groove section 1111;

the first abutting section 3311 abuts against the second inner sidewall 1111a, and the second abutting section 3313 abuts against the second fixing groove section 1111.

It can be understood that the contour line formed by the axial projection of the first inner sidewall along the central axis hole 31 is matched with the arc line outside the first abutting section 3311, so that the two are in seamless abutting connection, and the fixing effect of the tooth portion 30 and the yoke portion 10 is improved. In this embodiment, the first inner side wall is completely penetrated, and it can be understood that the connection line of the second fixing section notch is the form when the first inner side wall is not penetrated. And, the second inside wall 1111a is the setting of expanding type, that is, the width of two second inside walls 1111a is greater than the length of first inside wall (the notch length of second fixed slot 111) on same horizontal plane to make the butt portion 331 butt effect of width broad better, thereby increase the stability of increasing tooth portion 30 and yoke portion 10. The inner wall surface of the second fixed slot segment 1111 may be an arc surface, so as to further increase the contact area between the second fixed slot segment 1111 and the second abutting segment 3313, thereby facilitating to increase the stability of the tooth portion 30 and the yoke portion 10.

Referring to fig. 8 and 9, in an embodiment of the present application, a distance from the second inner sidewall 1111a to an outer side surface of the tooth portion 30 is L, a thickness of the first abutting section 3311 is L, and a relationship between L and L is: l is more than L. Note that, the distance L specifically means: when the outer side surface of the tooth portion 30 is disposed in a plane, a perpendicular line perpendicular to the outer side surface is defined, and a length formed by intersecting the perpendicular line with the second inner side wall 1111a is a distance L; when the outer side surface of the tooth portion 30 is curved, a straight line is defined to extend along the radial direction of the curved surface, and the length formed by the straight line intersecting with the second inner side wall 1111a is also the distance L;

the thickness l specifically means: the first abutting section 3311 includes an inner side surface adjacent to the central axis hole 31 and an outer side surface adjacent to the yoke 10, a distance between the inner side surface and the outer side surface is a thickness of the first abutting section 3311, when the inner side surface or the outer side surface is a curved surface, a connecting line is formed along a radial extension of the curved surface of one of the inner side surface and the outer side surface, and a length of a line segment intersecting the other side surface is a thickness l. It can be understood that, when L > L, the yoke 10 is not deformed when being mounted in contact with the tooth 30, and the first contact section 3311 of the tooth 30 has a smaller thickness and therefore has a smaller strength and is easily bent, so that the first contact section 3311 can be in interference contact with the second inner sidewall 1111a, thereby improving the mounting stability of the tooth 30 and the yoke 10. And the thick thickness of the yoke 10 can reduce magnetic density and temperature rise, thereby contributing to the improvement of the performance of the stator 100.

Referring to fig. 2 to 7, in an embodiment of the present application, the stator 100 includes a plurality of teeth portions 30 stacked on each other along an axial direction of the central shaft hole 31, an end of each pole body 33 facing away from the second abutting section 3313 extends inward to form two pole shoes 333, the pole shoes 333 jointly enclose the central shaft hole 31, the pole shoes 333 of two adjacent pole bodies 33 are disposed adjacent to each other, and the stator 100 further includes a connecting member 90, wherein the connecting member 90 connects the pole bodies 33. The plurality of teeth 30 are stacked on each other to allow eddy current to flow in a narrow and long circuit, and the smaller cross section increases the resistance in the eddy current path, thereby reducing eddy current loss and reducing the amount of heat generated by the stator 100 during use.

Referring to fig. 2 to 8, in an embodiment of the present application, the tooth portion 30 further includes:

the tooth grooves 35 are formed by enclosing two adjacent pole bodies 33 together;

at least two slot wedges 50, one slot wedge 50 is inserted into one tooth slot 35 and is abutted against the slot wall of the tooth slot 35, and part of the slot wedge 50 extends out of the tooth slot 35 along the axial direction of the central shaft hole 31;

a coil 70, wherein the coil 70 passes around two adjacent slot wedges 50 and passes through two adjacent slots 35.

In an embodiment of the present application, the depth of the tooth slot 35 is 15mm-25mm, the tooth slot 35 has a slot opening close to the yoke 10 and a slot bottom far from the yoke 10, and the slot depth of the tooth slot 35 specifically refers to the distance between the slot opening and the slot bottom. If the depth of the gullet 35 is set too large, the winding efficiency is low; if the depth of the slot 35 is set to be relatively small, it may be difficult to completely wind the winding coil 70 on the tooth 30. Here, the slot depth of the tooth slot 35 is set to be between 15mm and 25mm, so that the slot depth of the tooth slot 35 can be shallow on the premise that the winding coil 70 is completely wound on the tooth portion 30, and the improvement of the winding efficiency is facilitated.

The slot wedge 50 is arranged for winding the coil 70 of the motor, the winding is arranged in a core slot of the generator, the slot wedge 50 is driven into the upper surface to fix the coil 70 winding so as to prevent the sliding of the coil 70 winding during operation,

referring to fig. 4, it can be understood that in order to maintain the effect of insulation of the wedge 50, the height H of the portion of the wedge 50 protruding out of the slot 35 is greater than the creepage distance L. The creepage distance L refers to the shortest distance between two conductive parts along the surface of the insulating material, which is measured along the insulating surface, and under different use conditions, the creepage distance L refers to the charged area where the insulating material exhibits a charging phenomenon due to the fact that the insulating material around the conductor is electrically polarized, i.e., the creepage distance L is the shortest distance between two conductive parts having a potential difference along the surface of the insulating material. And the end surfaces of the winding of the coil 70 and the stator 100 have a gap with a height H, so that the heat dissipation effect of the motor can be improved. Or the slot wedge 50 may be disposed in a shaft sleeve shape, and the shaft sleeve is sleeved in the slot 35, so that the heat dissipation effect of the motor can be improved.

Referring to fig. 11, in an embodiment of the present application, the slot wedge 50 includes a turned edge 511, and the turned edge 511 extends from an end of the slot wedge 50 protruding out of the tooth slot 35 and abuts against an outer surface of the tooth 30. The provision of the burring 511 can increase the contact area of the slot wedge 50 and the tooth portion 30, thereby enhancing the abutting fixation effect of the two.

In an embodiment of the present application, the slot wedge 50 includes a first insulating portion 51 and a second insulating portion 53 abutting against the first insulating portion 51, the first insulating portion 51 is disposed around the slot 35 and abuts against a slot wall of the slot 35, and the second insulating portion 53 blocks a gap formed by two adjacent first abutting sections 3311. When setting up first insulation portion 51 for the wire-wound effect of coil 70 winding is better, and because the position of each part of first insulation portion 51 butt utmost point body 33 for the stability of utmost point body 33 is better, and then can reduce the noise that pole piece 333 vibrates and produces, facilitates the use. And the gap (slot 35) formed by the second insulating part 53 blocking the two first abutting sections 3311 can make the structure of the slot wedge 50 more stable, so that the first insulating part 51 abuts against the position of each part of the pole body 33, and the stability of the pole body 33 is better.

Referring to fig. 16, the present application further provides a manufacturing method of the stator 100, where the manufacturing method of the stator 100 includes the following steps:

step S10: aligning the tooth portion 30 with the mounting hole 11 of the yoke 10; in this embodiment, can be through setting up positioning die, this positioning die is formed with the constant head tank and is located the reference column at constant head tank middle part, places yoke portion 10 in positioning die and the cell wall that makes yoke portion 10's surface butt constant head tank, can realize yoke portion 10 and tooth portion 30's location through pegging graft the reference column in tooth portion 30's central shaft hole 31 again. Before this step S10, a plurality of teeth 30 and yokes 10 are mounted to form a plurality of stacked teeth 30 and yokes 10, so that the motor can operate normally.

Step S20: the tooth portion 30 is press-fitted to the yoke portion 10, and the abutment portion 331 is brought into interference contact with the fixing groove 111.

Can be through compressing tightly in this embodiment, with tooth portion 30 pressfitting in yoke portion 10, this pressfitting face of compressing tightly personally submits plane setting to can make tooth portion 30 pressfitting in yoke portion 10 completely, make things convenient for the motor to install.

Further, before the step S10 of aligning the tooth 30 with the mounting hole 11 of the yoke 10, the method further includes:

the slot wedge 50 is turned over to form a flange 511, and then the slot wedge 50 is inserted into the tooth slot 35; in this embodiment, the wedge 50 may be formed into the burring 511 by stamping, thereby facilitating the installation and fixation of the wedge 50.

The stator 100 is wound by the outer winding of the coil 70.

The winding of the coil 70 is externally wound without cutting off a thread end and stopping to replace and install the stator 100, so that the production process of the stator 100 is effectively simplified, and the production efficiency of the stator 100 is greatly improved.

The present invention also proposes an electric motor comprising a stator 100 and a rotor rotatably coupled to said central shaft hole 31, the stator 100 comprising: a yoke 10, wherein the yoke 10 is formed with a mounting hole 11, the hole wall of the mounting hole 11 is concavely formed with at least two fixing grooves 111, and the fixing grooves 111 are arranged at intervals along the circumferential direction of the mounting hole 11; and the tooth part 30, the tooth part 30 is installed in the installation hole 11, the tooth part 30 is provided with a central shaft hole 31 and at least two pole bodies 33, the pole bodies 33 are arranged at intervals along the circumferential direction of the central shaft hole 31, one end of each pole body 33, which is far away from the central shaft hole 31, is provided with an abutting part 331, the width of the abutting part 331 is B, the width of the pole body 33 is B, and the relation between B and B is as follows: b > B, and the abutting portion 331 is in interference contact with the fixing groove 111. Since the motor adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and are not repeated herein.

The present invention further provides a fan, which includes a motor, and the specific structure of the motor refers to the above embodiments, and since the fan employs all technical solutions of all the above embodiments, the fan at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A stator, comprising:

2. The stator according to claim 1, wherein the abutting portion includes first abutting sections extending in a width direction of the pole body, the first abutting sections are disposed on opposite sides of the pole body, a distance between ends of the first abutting sections is B, and the first abutting sections are in interference connection with the fixing grooves.

3. The stator of claim 1, wherein the abutting portion comprises a first abutting section extending in a width direction of the pole body, the first abutting section is arranged on one side of the pole body, a distance from an end of the first abutting section to a side of the pole body, which is far away from the first abutting section, is B, and the first abutting section is in interference connection with the fixing groove.

4. The stator according to claim 2, wherein the abutting portion is further provided with a second abutting section which is located between the two first abutting sections and extends in the length direction of the pole body, and the second abutting section is in interference abutment with the fixing groove.

5. The stator of claim 4, wherein the fixing groove comprises a first fixing groove section and a second fixing groove section, the first fixing groove section comprising a first inner sidewall and a second inner sidewall connected to the first inner sidewall, the first inner sidewall being recessed to form the second fixing groove section;

6. The stator according to claim 5, wherein the distance from the second inner sidewall to the tooth outer side is L, the thickness of the first abutment section is L, and the relationship between L and L is: l is more than L.

7. The stator as claimed in claim 5, wherein the stator includes a plurality of said teeth stacked on each other along the axial direction of the central axial hole, the end of each said pole body facing away from the second abutting section extends inward to form two pole shoes, the plurality of said pole shoes jointly enclose the central axial hole, the pole shoes of two adjacent said pole bodies are disposed adjacent to each other, and the stator further includes a connecting member connecting the plurality of said pole bodies.

8. The stator according to any one of claims 2 to 7, wherein the tooth further comprises:

the two adjacent pole bodies jointly enclose to form a tooth socket;

9. The stator of claim 8 wherein said slot wedge includes a flange extending from an end of said slot wedge projecting beyond said tooth slot and abutting an outer surface of said tooth.

10. The stator according to claim 8, wherein the slot wedge includes a first insulating portion disposed around the slot and abutting against a slot wall of the slot, and a second insulating portion abutting against the first insulating portion, the second insulating portion closing a gap formed by two adjacent first abutting sections.

11. A method of manufacturing a stator according to any of claims 1 to 10, comprising the steps of:

aligning a tooth portion with a mounting hole of the yoke portion;

12. The method of claim 11, wherein the step of aligning the teeth with the mounting holes of the yoke further comprises:

13. An electric motor comprising a stator and a rotor rotatably coupled to said central shaft hole, said stator being manufactured by the method of manufacturing a stator according to claim 11 or 12.

14. A fan comprising the motor of claim 13.