CN214013963U - Stator, motor and household electrical appliance - Google Patents

Abstract

The utility model provides a stator, motor and household electrical appliances. The stator comprises a stator core, an insulating frame, a stator winding and an insulating piece, wherein the stator core comprises a plurality of stator teeth and a stator yoke part which is arranged separately from the plurality of stator teeth; the insulating frame is arranged on the plurality of stator teeth; the stator winding is arranged on the insulating frame, wherein the insulating frame and the stator winding are positioned on one side of the stator yoke part facing the plurality of stator teeth, and a gap is formed between the stator yoke part and the stator winding; an insulator is disposed in at least a portion of the gap. The utility model discloses a set up the insulating part in stator yoke portion and stator winding's at least some clearance, make the creepage distance between stator yoke portion and the stator winding increase, improved the insulating properties of stator.

Description

Stator, motor and household electrical appliance

Technical Field

The utility model relates to the technical field of electric machines, particularly, relate to a stator, a motor and a household electrical appliances.

Background

At present, in current stator structure, stator winding and other parts of motor set up adjacently, however, because the overall dimension restriction or the performance requirement of motor, stator winding and other parts of motor often are close, are difficult to satisfy the insulation demand, then need take corresponding design to increase the creepage distance between stator winding and other parts of motor.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

To this end, a first aspect of the present invention is to provide a stator.

A second aspect of the present invention is to provide an electric machine.

A third aspect of the present invention is to provide a household electrical appliance.

In view of this, according to a first aspect of the present invention, there is provided a stator including a stator core, an insulating frame, a stator winding, and an insulating member. The stator core comprises a plurality of stator teeth and a stator yoke part which can be separated from the plurality of stator teeth, the insulating frame is arranged on the plurality of stator teeth, and the stator winding is arranged on the insulating frame. Wherein the insulating frame and the stator winding are located on a side of the stator yoke facing the plurality of stator teeth, a gap is provided between the stator yoke and the stator winding, and the insulating member is provided in at least a part of the gap.

The utility model provides a stator includes stator core, stator core include a plurality of stator teeth and with the stator yoke portion of a plurality of stator tooth separable settings. Specifically, when the stator teeth and the stator yoke are in a separated state, the stator teeth are wound, the winding difficulty is small in the separated state of the stator teeth, the stator teeth are easy to assemble, and coils can be prevented from being stacked. After the stator winding is assembled, the stator teeth provided with the stator winding can be assembled on the stator yoke, so that the stator yoke and the stator teeth are relatively fixed. The number of stator teeth is plural, and preferably, the number of stator teeth is even.

Further, the stator further comprises an insulating frame disposed on the plurality of stator teeth. Specifically, a space exists between two adjacent stator teeth, and the insulating frame is disposed outside the stator teeth through the space between the two adjacent stator teeth. The insulating frame has an insulating function, and at least two adjacent stator teeth can realize insulating barrier through the insulating frame. Specifically, the insulating frame material may be made of a plastic with good insulating property and high strength, such as a plastic part formed by any one or any combination of a high temperature resistant epoxy molding compound, a heat resistant modified polyester powder plastic, and a compression plastic. The working of plastics is easily shaping, and insulating properties is good, and intensity is high to can realize good insulating effect and support effect.

Further, the stator also comprises a stator winding, and the stator winding is arranged on the insulating frame. The stator winding is composed of a linear conductor coated with an insulating coating, and the linear conductor coated with the insulating coating is wound in multiple layers and is installed on the insulating frame to form the stator winding. Specifically, different winding modes can be selected for the stator winding according to different performance requirements or assembly process requirements of the motor.

Further, the insulating frame and the stator winding are located on a side of the stator yoke facing the plurality of stator teeth with a gap therebetween. The insulating frame is arranged on the plurality of stator teeth, particularly on one side of the stator teeth close to the stator yoke, and correspondingly, the insulating frame is positioned on one side of the stator yoke facing the plurality of stator teeth. The stator winding is disposed on the insulating frame on a side of the stator yoke facing the plurality of stator teeth. It can be understood that the insulating frame and the stator winding are arranged on one side of the stator teeth close to the stator yoke, so that the distance between the stator winding and the center of the stator is increased, namely the radius of the circle formed by the stator winding is increased, the installation space of the stator winding is increased, and more stator windings can be installed in the stator. When stator yoke portion and a plurality of stator tooth assemble, because be provided with insulating frame and stator winding on a plurality of stator teeth, for avoiding stator yoke portion to take place to interfere with stator winding in assembling process, certain clearance has between stator yoke portion and the stator winding.

Further, the stator further includes an insulator. After the stator yoke part is assembled with the plurality of stator teeth, the stator winding is wound on the insulating frame, and the plurality of stator teeth are isolated from the stator winding in an insulating mode through the insulating frame. The stator winding is located between insulating frame and the stator yoke portion, and the insulating medium between stator winding and the stator yoke portion is the air in the insulating sheath of stator winding outsourcing and the clearance between stator winding and the stator yoke portion, can take place the air breakdown when stator winding and stator yoke portion apart from unsatisfied insulation requirement. In order to improve the insulating capacity between the stator winding and the stator yoke, an insulating part is arranged in at least one part of a gap between the stator winding and the stator yoke, so that the creepage distance between the stator winding and the stator yoke is increased, and the insulating capacity is improved.

It is worth mentioning that the gap formed between the stator yoke portion and the stator winding includes a gap with a larger size and a gap with a smaller size, and in order to enable the stator to meet the creepage distance requirement, the insulating member may be only arranged in the gap with the smaller size, thereby ensuring the insulating performance between the stator winding and the stator core. Of course, it will be appreciated that the insulator may also be provided in a larger sized gap in view of process requirements.

The stator assembly process is as follows:

firstly, an insulating frame is arranged on a stator core without a stator yoke, the insulating frame is arranged on one side, close to the stator yoke, of a stator tooth, and a stator tooth part provided with the insulating frame is formed.

The stator winding is wound on the stator tooth part provided with the insulating frame, various winding modes can be selected according to requirements, and the stator winding is arranged outside the insulating frame and close to the stator yoke part. The stator winding is mounted to form a stator tooth portion with the stator winding.

And (3) the stator tooth part provided with the stator winding is arranged in the stator yoke part, and the stator tooth part provided with the stator winding is in interference fit with the stator yoke part, so that the stator tooth part provided with the stator winding and the stator yoke part are relatively fixed to form the winding stator.

And (3) the insulating part is arranged in a partial gap between the stator yoke part and the wound stator in the wound stator, and two ends of the insulating part are respectively exposed out of two ends of the stator core along the axial direction after assembly, so that the stator is formed.

In one possible design, further, the gap includes a first gap and a second gap, a width of the first gap is greater than a width of the second gap, and at least a portion of the insulator is disposed within the second gap.

In this design, the gap includes a first gap and a second gap, and it is understood that the outer contour lines of the stator yoke and the stator winding may have an irregular shape, and the distances between the respective positions where the stator yoke and the stator winding are adjacent are different. The width of the first gap is greater than the width of the second gap, and at least a portion of the insulator is disposed within the second gap. It can be understood that the insulating capability of the first gap is superior to that of the second gap, the insulating capability of the first gap can meet the insulating requirement, and no air breakdown phenomenon occurs, while the width of the second gap is smaller than that of the first gap, the insulating capability of the second gap is poor, and the possibility of air breakdown occurs, so that the insulating piece is arranged at the second gap, the creepage distance between the stator yoke part and the stator winding at the second gap is increased, and the insulating capability of the second gap is improved.

In one possible design, the second gap is further equal to or less than 4 mm.

In this design, according to the requirement of national standard to creepage distance, the clearance between stator winding and the stator yoke portion is less than 4mm in the motor, then this clearance size can't satisfy between stator winding and the stator yoke portion to creepage distance's requirement, appears insulating unqualified problem easily, need take other design scheme so that it satisfies the requirement of national standard to creepage distance between stator winding and the stator yoke portion, improves insulating properties. That is, the insulator may be preferentially disposed in the second gap having a smaller size.

In one possible embodiment, the insulating element is arranged in the gap in the axial direction of the stator core.

In this design, the insulator is disposed in the gap so as to penetrate in the axial direction of the stator core, and specifically, the direction in which the insulator is inserted into the stator core is parallel to the axial direction of the stator core, and the insulator does not interfere with the stator core in the gap. Through making the insulating part run through the setting in the clearance to can ensure to satisfy the insulation requirement in the axial between stator winding and the stator yoke portion, two tip along stator core axial of insulating part all are higher than two terminal surfaces along axial of stator core. The creepage distance is the shortest path between two conductive parts measured along the insulating surface, and it can be understood that the larger the dimension of the two end surfaces of the insulating member in the axial direction higher than the stator core in the axial direction, the larger the creepage distance between the stator core and the stator winding.

In a possible design, further, the insulating member is any one or any combination of the following: at least one insulated arc segment and at least one insulated straight segment.

In this design, the insulation is any one or any combination of the following: at least one insulated arc segment and at least one insulated straight segment. Specifically, because the shapes of the stator winding and the stator yoke are irregular, the gap formed by the stator winding and the stator yoke is irregular, the insulating part is axially arranged in the gap formed by the stator winding and the stator yoke in a penetrating manner, and in order to avoid interference between the insulating part and the stator winding as well as between the insulating part and the stator yoke, the shape of the insulating part is matched with the shape of the gap. It is understood that the insulator is irregularly shaped and includes at least one insulating arc segment and at least one insulating straight segment. It is worth mentioning that the projection of the insulating member on the axial end face perpendicular to the stator core comprises at least one insulating arc segment and at least one insulating straight segment.

In a possible design, further, the stator further includes a positioning portion disposed on the insulating frame, and the insulating member is connected to the positioning portion in an adaptive manner.

In this design, the stator still includes location portion, and location portion sets up on insulating frame, insulating part and location portion adaptation are connected, and insulating part inserts in the clearance along stator core axial, and insulating part contacts with the location portion on the insulating frame at the insertion in-process, and location portion provides the guide for the direction of insertion of insulating part, avoids the insulating part crooked, and then inserts the direction mistake. When the insulating part is inserted to the preset position, the positioning part limits the insulating part, so that the insulating part is prevented from being inserted continuously, and the insulating part is installed at the correct position. The positioning part provides guiding and limiting functions for the insulating part, and ensures that the insulating part is assembled according to a correct path in the assembling process, so that the insulating part can be installed and fixed at a correct position of the stator.

In one possible design, the insulating frame further includes a first insulating frame and a second insulating frame, the second insulating frame being detachably disposed on the first insulating frame, the second insulating frame and the first insulating frame being disposed on a side of the plurality of stator teeth adjacent to the stator yoke.

In this design, insulating frame first insulation frame and second insulation frame, second insulation frame detachably set up on first insulation frame, specifically, second insulation frame and first insulation frame form hollow installation cavity after connecting, and a part of stator core is located the installation cavity. Further, first insulation frame and second insulation frame all are provided with connection structure, and specifically, connection structure can be for connector link, protruding and recess interference fit structure, screw connection structure, can realize the high-speed joint or the dismantlement between first insulation frame and the second insulation frame, make and connect reliable and stable between first insulation frame and the second insulation frame. Through designing insulating frame for first insulating frame and second insulating frame, make insulating frame's dismantlement or installation more convenient, improved stator core's assembly or maintenance efficiency.

Further, the second insulating frame and the first insulating frame are disposed on a side of the plurality of stator teeth close to the stator yoke. It can be understood that, the second insulating frame and the first insulating frame are arranged on the side of the stator teeth close to the stator yoke, the distance between the second insulating frame and the first insulating frame and the center of the stator can be increased, the stator winding is arranged on the insulating frame formed by the first insulating frame and the second insulating frame, namely, the radius of the circle formed by the stator winding is increased, the installation space of the stator winding is increased, and more stator windings can be installed in the stator.

In one possible design, further, adjacent two of the plurality of stator teeth form a stator slot. The stator further includes an insulating paper disposed in at least one of the plurality of stator slots.

In the design, two adjacent stator teeth in the plurality of stator teeth form a stator slot, the insulating frame penetrates through the interval between the two adjacent stator teeth and is arranged on the outer side of the stator teeth, the stator windings are wound on the insulating frame, understandably, two groups of stator windings can exist in the same stator slot at the same time, the two groups of stator windings are close to the two stator teeth forming the stator slot in a mode of deviating from each other, and the interval exists between the two groups of stator windings in the same stator slot. Further, the stator further includes an insulating paper disposed in at least one of the plurality of stator slots. Specifically, the insulation paper is arranged in a stator slot formed by two stator teeth which are close to each other, after the stator winding is wound, the insulation paper at the slot opening of the stator slot is bent towards the center of the stator slot, the insulation paper at the two sides of the slot opening of the stator slot is lapped with each other after being bent, so that the stator slot is closed, and the insulation isolation between the stator winding and a stator yoke part in the stator slot is realized.

In a possible design, further, the plurality of stator teeth include a plurality of straight teeth and a plurality of bent teeth, each straight tooth is disposed between two adjacent teeth of the plurality of bent teeth, wherein the straight teeth include first straight teeth, the plurality of bent teeth include first bent teeth, the first bent teeth are bent toward a direction close to the first straight teeth, the first straight teeth and the first bent teeth form first stator grooves, and the insulation paper is disposed in the first stator grooves.

In this design, the plurality of stator teeth includes a plurality of straight teeth and a plurality of bent teeth, each straight tooth disposed between adjacent ones of the plurality of bent teeth. Specifically, the straight teeth and the bent teeth have different structures, and different distances and different structures are formed between adjacent or similar stator teeth by arranging the straight teeth and the bent teeth with different structures. The stator winding is wound on the stator teeth, and the winding treatment can be carried out by selecting a proper distance or a proper structure according to the winding mode. Specifically, the usage of the stator windings is related to the spacing of the stator teeth, and the larger the spacing of the stator teeth, the larger the usage of the stator windings. The stator winding is wound on the stator teeth which are close to each other, so that the using amount of the stator winding can be saved. On the other hand, if the stator winding is easy to slip off from the stator teeth, the bent teeth can be selected for winding, the bent teeth have a certain limiting effect on the stator winding, and the stator winding can be prevented from slipping off from the stator teeth.

Further, each of the straight teeth is disposed between adjacent two of the plurality of bent teeth, and it is understood that the straight teeth and the bent teeth are alternately disposed at intervals on the stator yoke. Because the straight teeth and the bent teeth have different structures, the straight teeth and the bent teeth are alternately arranged on the stator yoke part, so that the stator teeth with various distances and various structures are regularly arranged, the stator winding can meet different winding requirements when being wound, and the stator winding can be regularly arranged.

Further, the straight-teeth include first straight-teeth, and a plurality of bent teeth include first bent tooth, and first bent tooth is buckled towards the direction that is close to first straight-teeth along the direction that deviates from the stator center, and first straight-teeth and first bent tooth form first stator groove, and understandably, the width of first stator groove is followed the direction that deviates from the stator center and is narrowed gradually. The insulating paper sets up in first stator groove, because notch department of first stator groove narrows down, is convenient for realize the insulating isolation between stator winding and the stator yoke portion through the insulating paper.

According to a second aspect of the present invention, there is provided an electrical machine comprising a stator provided by any of the above designs.

In particular, the motor is a single-phase asynchronous motor.

The utility model provides a motor, including the stator that any above-mentioned design provided, consequently have whole beneficial effect of this stator, no longer describe herein.

In one possible design, the motor further comprises an end cover, the end cover is provided with a mounting cavity, the stator is installed in the mounting cavity, and the insulating piece is in contact with the inner diameter of the end cover.

In the design, the motor further comprises end covers, the number of the end covers is at least two, and the at least two end covers are respectively arranged on two sides of the stator along the axial direction. The end covers are provided with assembly cavities, at least two end covers form a closed assembly cavity after assembly is completed, and the stator is installed in the assembly cavities. Furthermore, the insulating part is in contact with the inner diameter of the end cover, so that the stator winding and the end cover are isolated by the insulating part, and the creepage distance between the stator winding and the end cover is increased.

In a possible design, further, the height of the axial end of the insulator protruding from the axial end face of the stator core is 4mm or more.

In the design, the axial end part of the insulating part protrudes out of the axial end face of the stator core, and the distance between the end cover and the stator core when the end cover is assembled on the stator core is at least larger than the height of the axial end part of the insulating part protruding out of the axial end face of the stator core. Specifically, make the axial tip protrusion of insulating part in the high more than or equal to 4mm of stator core's axial terminal surface, can make the distance between end cover and the stator core more than or equal to 4mm, this distance can satisfy the requirement of national standard to creepage distance.

In one possible design, the end cap includes a first end cap and a second end cap removably coupled to the first end cap, the second end cap and the first end cap forming the assembly cavity.

In this design, the end caps include a first end cap and a second end cap removably coupled to the first end cap. The first end cover further comprises a first installation part, the second end cover further comprises a second installation part, and the first end cover and the second end cover are installed and detached between the second end cover and the first end cover through the first installation part and the second installation part, so that the second end cover is detachably connected with the first end cover. Further, the second end cover and the first end cover form an assembly cavity, and the stator is installed in the assembly cavity.

In a possible design, the end cover further includes a first positioning portion and a second positioning portion, the first positioning portion is disposed on the first end cover, the second positioning portion is disposed on the second end cover, and the first positioning portion and the second positioning portion are in adaptive connection.

In this design, the first end cover includes a first locating portion, the second end cover includes a second locating portion, and the first end cover and the second end cover achieve the location of the second end cover relative to the first end cover through the first locating portion and the second locating portion.

It should be noted that the first mounting portion and the first positioning portion may be integrated on the same structure, and in this case, the corresponding second mounting portion and the corresponding second positioning portion are also integrated on the same structure. Namely, the detachable connection and the positioning installation can be realized through one structure, so that the integral structure of the end cover can be simplified, and the production cost is reduced.

According to the utility model discloses a third aspect provides a household electrical appliance, including the motor that any above-mentioned design provided.

Specifically, the household appliances are fan heaters, exhaust fans and fans.

The utility model provides a household electrical appliances, including the motor that any above-mentioned design provided, consequently have the whole beneficial effect of this motor, no longer describe herein.

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

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural diagram of a top view of a portion of a stator core without a stator yoke mounted thereto and with an insulating frame in accordance with an embodiment of the present invention;

fig. 2 shows a top view of a stator without insulation installed in an embodiment in accordance with the invention;

fig. 3 shows a front view of a stator to which an insulator is to be mounted according to an embodiment of the invention;

fig. 4 shows a top view of a stator in an embodiment in accordance with the invention;

fig. 5 shows a front view of the stator in an embodiment according to the invention;

fig. 6 shows an exploded view of an electric machine to which an end cap is to be mounted in accordance with an embodiment of the invention;

fig. 7 shows a schematic structural view of the electric machine in an embodiment according to the invention;

fig. 8 shows a cross-sectional view along a-a of the electric machine according to an embodiment of the invention shown in fig. 7.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:

100 of the stator, and a stator,

110 of the stator core are provided with a plurality of stator cores,

111 stator teeth, 1111 first straight teeth, 1112 first bent teeth,

112 the yoke part of the stator, and,

113 stator slots, 1131 first stator slots,

120 insulating frame, 121 first insulating frame, 122 second insulating frame,

130 of the stator winding of the motor, and,

140 of the shape of the insulating member,

150 gap, 151 first gap, 152 second gap,

160 of an insulating paper, and a method for manufacturing the same,

200 of the motor, and the motor is arranged,

210 end cap, 211 assembly chamber, 212 first end cap, 213 second end cap.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A stator 100, a motor 200, and a home appliance provided according to some embodiments of the present invention are described below with reference to fig. 1 to 8.

Example one

According to a first aspect of the present invention, as shown in fig. 1 to 5, there is provided a stator 100 including a stator core 110, an insulation frame 120, a stator winding 130, and an insulator 140. The stator core 110 includes a plurality of stator teeth 111 and a stator yoke 112 provided separately from the plurality of stator teeth 111, an insulation frame 120 is provided on the plurality of stator teeth 111, and a stator winding 130 is provided on the insulation frame 120. Wherein the insulating frame 120 and the stator winding 130 are located at a side of the stator yoke portion 112 facing the plurality of stator teeth 111, the stator yoke portion 112 and the stator winding 130 have a gap 150 therebetween, and the insulating member 140 is disposed in at least a portion of the gap 150.

The utility model provides a stator 100 includes stator core 110, stator core 110 include a plurality of stator teeth 111 and with a plurality of stator teeth 111 separable set's stator yoke portion 112. Specifically, when the stator teeth 111 and the stator yoke 112 are in a separated state, the winding process is performed on the stator teeth 111, the winding difficulty is small in the separated state of the stator teeth 111, the assembly is easy, and the coils can be prevented from being stacked. After the stator winding 130 is assembled, the stator teeth 111 with the stator winding 130 mounted thereon may be assembled to the stator yoke 112 such that the stator yoke 112 and the stator teeth 111 are relatively fixed. The number of the stator teeth 111 is plural, and preferably, the number of the stator teeth 111 is even.

Further, the stator 100 further includes an insulation frame 120, and the insulation frame 120 is disposed on the plurality of stator teeth 111. Specifically, there is a space between two adjacent stator teeth 111, and the insulating frame 120 is disposed outside the stator teeth 111 through the space between the two adjacent stator teeth 111. The insulating frame 120 has an insulating function, and at least two adjacent stator teeth 111 can be insulated and isolated through the insulating frame 120. Specifically, the insulating frame 120 may be made of a plastic with good insulating property and high strength, such as a plastic part formed by any one or any combination of a high temperature resistant epoxy molding compound, a heat resistant modified polyester powder plastic, and a compression plastic. The working of plastics is easily shaping, and insulating properties is good, and intensity is high to can realize good insulating effect and support effect.

Further, the stator 100 further includes a stator winding 130, and the stator winding 130 is disposed on the insulation frame 120. The stator winding 130 is formed of a linear conductor coated with an insulating layer, and the linear conductor coated with an insulating layer is wound in multiple layers and mounted on the insulating frame 120 to form the stator winding 130. Specifically, different winding manners may be selected for the stator winding 130 according to different performance requirements or assembly process requirements of the motor 200.

Further, the insulating frame 120 and the stator winding 130 are located on a side of the stator yoke 112 facing the plurality of stator teeth 111, with a gap 150 between the stator yoke 112 and the stator winding 130. The insulating frame 120 is disposed on the plurality of stator teeth 111, and particularly, the insulating frame 120 is disposed on a side of the stator teeth 111 close to the stator yoke 112, and accordingly, the insulating frame 120 is located on a side of the stator yoke 112 facing the plurality of stator teeth 111. The stator winding 130 is provided on the insulating frame 120 on a side of the stator yoke 112 facing the plurality of stator teeth 111. It is understood that, by disposing the insulating frame 120 and the stator winding 130 on the side of the stator teeth 111 close to the stator yoke 112, the distance between the stator winding 130 and the center of the stator 100 can be increased, that is, the radius of the circle formed by the stator winding 130 is increased, the installation space of the stator winding 130 is increased, and more stator windings 130 can be installed in the stator. When the stator yoke 112 is assembled with the plurality of stator teeth 111, since the plurality of stator teeth 111 are provided with the insulating frame 120 and the stator winding 130, in order to prevent the stator yoke 112 from interfering with the stator winding 130 in the assembling process, a certain gap 150 is formed between the stator yoke 112 and the stator winding 130.

Further, the stator 100 further includes an insulator 140. After the stator yoke 112 is assembled with the plurality of stator teeth 111, the stator winding 130 is wound on the insulating frame 120, and the plurality of stator teeth 111 are insulated and isolated from the stator winding 130 by the insulating frame 120. The stator winding 130 is located between the insulating frame 120 and the stator yoke 112, the insulating medium between the stator winding 130 and the stator yoke 112 is the insulating sheath wrapped around the stator winding 130 and the air in the gap 150 between the stator winding 130 and the stator yoke 112, and when the distance between the stator winding 130 and the stator yoke 112 does not meet the insulating requirement, air breakdown occurs. In order to improve the insulating ability between the stator winding 130 and the stator yoke 112, an insulating member 140 is provided in at least a part of a gap 150 between the stator winding 130 and the stator yoke 112, so that the creepage distance between the stator winding 130 and the stator yoke 112 is increased, and the insulating ability is improved.

It is noted that the gap 150 formed between the stator yoke portion 112 and the stator winding 130 includes a gap having a large size and a gap having a small size, and in order to make the stator 100 satisfy the creepage distance requirement, the insulating member 140 may be disposed only in the gap having the small size, thereby ensuring the insulating performance between the stator winding 130 and the stator core 110. Of course, it is understood that the insulator 140 may be disposed within a larger sized gap in view of process requirements.

The assembly process of the stator 100 is as follows:

firstly, the insulating frame 120 is installed on the stator core 110 without the stator yoke 112, and the insulating frame 120 is arranged on one side of the stator teeth 111 close to the stator yoke 112 to form the stator teeth part with the insulating frame 120.

The stator winding 130 is wound on the stator tooth part provided with the insulating frame 120, the stator winding 130 can be wound in a plurality of winding modes according to requirements, and the stator winding 130 is arranged outside the insulating frame 120 and close to the stator yoke part 112. The stator windings 130 are mounted to form stator teeth in which the stator windings 130 are mounted.

The stator teeth with the stator windings 130 are installed in the stator yoke 112, and the stator teeth with the stator windings 130 and the stator yoke 112 are in interference fit, so that the stator teeth with the stator windings 130 and the stator yoke 112 are relatively fixed, and a wound stator is formed.

The insulator 140 is fitted into a partial gap 150 between the stator yoke 112 and the wound stator in the wound stator, and both ends of the insulator 140 are exposed to both ends of the stator core 110 in the axial direction after assembly, respectively, to constitute the stator.

Example two

On the basis of the first embodiment, as shown in fig. 1 to 5, the present embodiment specifically defines the structure of the stator 100. The gap 150 includes a first gap 151 and a second gap 152, the first gap 151 having a width greater than a width of the second gap 152, and at least a portion of the insulating member 140 being disposed within the second gap 152.

In this design, the gap 150 includes a first gap 151 and a second gap 152, and it is understood that the outer contour lines of the stator yokes 112 and the stator windings 130 may have irregular shapes, and the distances between the adjacent positions of the stator yokes 112 and the stator windings 130 are different. The width of the first gap 151 is greater than the width of the second gap 152, and at least a portion of the insulating member 140 is disposed within the second gap 152. It can be understood that the insulating capability of the first gap 151 is better than that of the second gap 152, the insulating capability of the first gap 151 can meet the insulating requirement, and no air breakdown occurs, while the width of the second gap 152 is smaller than that of the first gap 151, the insulating capability of the second gap 152 is poorer, and there is a possibility of air breakdown, so that the insulating member 140 is arranged at the second gap 152, the creepage distance between the stator yoke portion 112 and the stator winding 130 at the second gap 152 is increased, and the insulating capability of the second gap 152 is improved.

In one possible design, further, the second gap 152 is equal to or less than 4 mm.

In this design, according to the requirement of national standard to creepage distance, when gap 150 between stator winding 130 and stator yoke portion 112 is less than 4mm in motor 200, then the size of this gap 150 can't satisfy the requirement of creepage distance between stator winding 130 and stator yoke portion 112, insulating unqualified problem appears easily, need take other design scheme between stator winding 130 and stator yoke portion 112 so that it satisfies the requirement of national standard to creepage distance, improves insulating properties. That is, the insulating member 140 may be preferentially disposed in the second gap 152 having a smaller size.

In one possible design, further, the insulator 140 is disposed in the gap 150 throughout the axial direction of the stator core 110.

In this design, the insulator 140 is penetratingly disposed in the gap 150 in the axial direction of the stator core 110, and specifically, the direction in which the insulator 140 is inserted in the stator core 110 is parallel to the axial direction of the stator core 110, and the insulator 140 does not interfere with the stator core 110 in the gap 150. By disposing the insulator 140 in the gap 150, it is possible to ensure that the insulation between the stator winding 130 and the stator yoke portion 112 in the axial direction is satisfied, and both end portions of the insulator 140 in the axial direction of the stator core 110 are higher than both end surfaces of the stator core 110 in the axial direction. The creepage distance is the shortest path between two conductive parts measured along the insulating surface, and it is understood that the larger the dimension of the insulating member 140 in the axial direction higher than both end surfaces of the stator core 110 in the axial direction, the larger the creepage distance between the stator core 110 and the stator winding 130.

In one possible design, further, the insulating member 140 is any one or any combination of the following: at least one insulated arc segment and at least one insulated straight segment.

In this design, the insulation 140 is any one or any combination of the following: at least one insulated arc segment and at least one insulated straight segment. Specifically, since the outer shapes of the stator winding 130 and the stator yoke 112 are irregular shapes, the gap 150 formed by the stator winding 130 and the stator yoke 112 is irregular, the insulating member 140 is axially disposed through the gap 150 formed by the stator winding 130 and the stator yoke 112, and in order to avoid interference between the insulating member 140 and the stator winding 130 and the stator yoke 112, the outer shape of the insulating member 140 should be adapted to the shape of the gap 150. It is understood that the insulator 140 is irregularly shaped and includes at least one insulating arc segment and at least one insulating straight segment. It is worth noting that the projection of the insulating member 140 on the axial end surface perpendicular to the stator core 110 includes at least one insulating arc segment and at least one insulating straight segment.

In a possible design, further, the stator 100 further includes a positioning portion disposed on the insulation frame 120, and the insulation member 140 is fittingly connected to the positioning portion.

In this design, the stator 100 further includes a positioning portion, the positioning portion is disposed on the insulating frame 120, the insulating member 140 is in fit connection with the positioning portion, the insulating member 140 is inserted into the gap 150 along the axial direction of the stator core 110, the insulating member 140 contacts with the positioning portion on the insulating frame 120 during the insertion process, and the positioning portion provides a guide for the insertion direction of the insulating member 140, so as to prevent the insulating member 140 from being skewed and further prevent the insertion direction from being wrong. When the insulating member 140 is inserted to a preset position, the positioning portion limits the insulating member 140, and prevents the insulating member 140 from being inserted continuously, so that the insulating member 140 is installed at a correct position. The positioning part provides a guiding and limiting function for the insulating member 140, and ensures that the insulating member 140 is assembled in a correct path during the assembly process, so that the insulating member 140 can be installed and fixed in a correct position of the stator 100. Specifically, the positioning part is a buckle or a groove. A portion of the insulating member 140 may be connected with a snap, thereby achieving a position fixing of the insulating member 140. Of course, the insulating member 140 may also extend into the groove and be in interference fit with the groove, and the fixed assembly of the insulating member 140 may also be achieved.

It should be noted that the positioning portion and the insulating frame 120 are an integral structure. Because the mechanical properties of integral type structure are good, therefore can improve the joint strength between location portion and insulating frame 120, in addition, can make location portion and insulating frame 120 an organic whole, batch production to improve the machining efficiency of product, reduce the processing cost of product. In addition, the positioning part and the insulating frame 120 are designed into an integrated structure which is integrally formed, so that the integrity of the product is improved, the number of parts is reduced, the installation procedures are reduced, the installation efficiency is improved, and the product is more convenient and reliable to install.

In one possible design, further, the insulation frame 120 includes a first insulation frame 121 and a second insulation frame 122, the second insulation frame 122 is detachably disposed on the first insulation frame 121, and the second insulation frame 122 and the first insulation frame 121 are disposed on a side of the plurality of stator teeth 111 close to the stator yoke portion 112.

In this design, the insulation frame 120 includes a first insulation frame 121 and a second insulation frame 122, and the second insulation frame 122 is detachably disposed on the first insulation frame 121, specifically, the second insulation frame 122 and the first insulation frame 121 are connected to form a hollow installation cavity, and a portion of the stator core 110 is located in the installation cavity. Further, first insulating frame 121 and second insulating frame 122 all are provided with connection structure, and specifically, connection structure can be for connector link, protruding and recess interference fit structure, screw connection structure, can realize the high-speed joint or the dismantlement between first insulating frame 121 and the second insulating frame 122, make and connect reliable and stable between first insulating frame 121 and the second insulating frame 122. By designing the insulation frame 120 as the first insulation frame 121 and the second insulation frame 122, the insulation frame 120 is more convenient to detach or mount, and the assembly or maintenance efficiency of the stator core 110 is improved.

Further, the second insulating frame 122 and the first insulating frame 121 are disposed on a side of the plurality of stator teeth 111 close to the stator yoke 112. It is understood that, by disposing the second insulating frame 122 and the first insulating frame 121 on the side of the stator teeth 111 close to the stator yoke 112, the distance between the second insulating frame 122 and the first insulating frame 121 and the center of the stator 100 can be increased, and the stator winding 130 is disposed on the insulating frame 120 formed by the first insulating frame 121 and the second insulating frame 122, that is, the radius of the circle formed by the stator winding 130 is increased, and the installation space of the stator winding 130 is increased, so that more stator windings 130 can be installed in the stator 100.

In one possible design, further, two adjacent stator teeth 111 of the plurality of stator teeth 111 form a stator slot 113. The stator 100 further includes an insulating paper 160, and the insulating paper 160 is disposed in at least one of the plurality of stator slots 113.

In this design, two adjacent stator teeth 111 of the plurality of stator teeth 111 form a stator slot 113, the insulating frame 120 is disposed outside the stator teeth 111 through the space between the two adjacent stator teeth 111, and the stator winding 130 is wound on the insulating frame 120, it can be understood that two sets of stator windings 130 may exist in the same stator slot 113 at the same time, the two sets of stator windings 130 are close to the two stator teeth 111 forming the stator slot 113 away from each other, and a space exists between the two sets of stator windings 130 in the same stator slot 113. Further, the stator further includes an insulating paper 160, and the insulating paper 160 is disposed in at least one of the plurality of stator slots 113. Specifically, the insulating paper 160 is disposed in the stator slot 113 formed by two adjacent stator teeth 111, after the stator winding 130 is wound, the insulating paper 160 at the slot opening of the stator slot 113 is bent toward the center of the stator slot 113, and the insulating paper 160 at the two sides of the slot opening of the stator slot 113 is bent and overlapped with each other to close the stator slot 113, so that the insulating isolation between the stator winding 130 and the stator yoke 112 in the stator slot 113 is realized.

In one possible design, further, the plurality of stator teeth 111 includes a plurality of straight teeth and a plurality of bent teeth, each straight tooth is disposed between two adjacent ones of the plurality of bent teeth, wherein the straight teeth includes a first straight tooth 1111, the plurality of bent teeth includes a first bent tooth 1112, the first bent tooth 1112 is bent in a direction adjacent to the first straight tooth 1111, the first straight tooth 1111 and the first bent tooth 1112 form a first stator groove 1131, and the insulation paper 160 is disposed in the first stator groove 1131.

In this design, the plurality of stator teeth 111 includes a plurality of straight teeth and a plurality of bent teeth, each straight tooth disposed between adjacent ones of the plurality of bent teeth. Specifically, the straight teeth and the bent teeth have different structures, and different distances and different structures are formed between adjacent or adjacent stator teeth 111 by arranging the straight teeth and the bent teeth with different structures. The stator winding 130 is wound around the stator teeth 111, and the winding process may be performed by selecting an appropriate distance or an appropriate structure according to the winding manner. Specifically, the usage of the stator windings 130 is related to the pitch of the stator teeth 111, and the larger the pitch of the stator teeth 111, the larger the usage of the stator windings 130. The stator winding 130 is wound around the stator teeth 111 at a short distance, so that the amount of the stator winding 130 can be saved. On the other hand, if the stator winding 130 is easily slipped off from the stator teeth 111, the bent teeth can be selected for winding, and the bent teeth can play a certain limiting role on the stator winding 130, so that the stator winding 130 can be prevented from slipping off from the stator teeth 111.

Further, each of the straight teeth is disposed between adjacent two of the plurality of bent teeth, and it is understood that the straight teeth and the bent teeth are alternately disposed at intervals on the stator yoke portion 112. Because the straight teeth and the bent teeth have different structures, the straight teeth and the bent teeth are alternately arranged on the stator yoke part 112, so that the stator teeth 111 with various distances and structures can be regularly arranged, the stator winding 130 can meet different winding requirements during winding, and the stator winding 130 can be regularly arranged.

Further, the straight teeth include a first straight tooth 1111, the plurality of bent teeth include a first bent tooth 1112, the first bent tooth 1112 is bent in a direction away from the center of the stator 100 toward a direction close to the first straight tooth 1111, and the first straight tooth 1111 and the first bent tooth 1112 form a first stator groove 1131, and it is understood that the width of the first stator groove 1131 is gradually narrowed in a direction away from the center of the stator 100. The insulation paper 160 is disposed in the first stator slot 1131, and since the slot of the first stator slot 1131 is narrowed, insulation isolation between the stator winding 130 and the stator yoke 112 is facilitated by the insulation paper 160.

It will be appreciated that the first straight teeth 1111 and the first bent teeth 1112 are narrowed at the notches of the stator slots 113, and accordingly, the first bent teeth 1112 and the other adjacent stator teeth 111 are gradually opened and widened at the notches of the stator slots 113. Preferably, the stator winding 130 and the stator yoke 112 can be insulated and isolated by arranging the insulating member 140 in the stator slot 113 with the widened slot opening, and the stator winding 130 and the stator yoke 112 can be insulated and isolated by arranging the insulating paper 160 in the stator slot 113 with the narrowed slot opening.

EXAMPLE III

According to a second aspect of the present invention, as shown in fig. 6 to 8, there is provided a motor 200 comprising a stator 100 provided by any of the above-mentioned designs.

Specifically, the motor 200 is a single-phase asynchronous motor.

The utility model provides a motor 200, including the stator 100 that any above-mentioned design provided, consequently have all beneficial effects of this stator 100, no longer describe herein.

Example four

On the basis of the third embodiment, as shown in fig. 6 to 8, the present embodiment specifically defines the structure of the motor 200.

In one possible design, further, the motor 200 further includes an end cap 210, the end cap 210 having a fitting cavity 211, the stator 100 being mounted in the fitting cavity 211, wherein the insulation 140 is in contact with an inner diameter of the end cap 210.

In this design, the motor 200 further includes end covers 210, the number of the end covers 210 is at least two, and at least two end covers 210 are respectively disposed on two sides of the stator 100 in the axial direction. The end caps 210 have assembly cavities 211, at least two end caps 210 form a closed assembly cavity 211 after assembly, and the stator 100 is installed in the assembly cavity 211. Further, the insulation 140 is in contact with the inner diameter of the end cap 210, so that the insulation 140 isolates the stator winding 130 from the end cap 210, and the creepage distance between the stator winding 130 and the end cap 210 is increased. It is noted that the end cap 210 is a metal end cap.

In one possible design, further, the height of the axial end of the insulator 140 protruding from the axial end face of the stator core 110 is 4mm or more.

In this design, as shown in fig. 5, the axial end of the insulator 140 protrudes from the axial end face of the stator core 110, and the distance between the end cover 210 and the stator core 110 when the end cover 210 is assembled on the stator core 110 is at least greater than the height of the axial end of the insulator 140 protruding from the axial end face of the stator core 110. Specifically, the height h of the axial end of the insulating member 140 protruding from the axial end surface of the stator core 110 is greater than or equal to 4mm, so that the distance between the end cover 210 and the stator core 110 is greater than or equal to 4mm, and the distance can meet the requirement of the national standard on the creepage distance.

In one possible design, the endcap 210 includes a first endcap 212 and a second endcap 213, the second endcap 213 being removably coupled to the first endcap 212, the second endcap 213 and the first endcap 212 defining the assembly cavity 211.

In this design, the endcap includes a first endcap 212 and a second endcap 213, with the second endcap 213 being removably connected with the first endcap 212.

In one possible design, the end cap 210 further includes a first positioning portion and a second positioning portion, the first positioning portion is disposed on the first end cap 212, the second positioning portion is disposed on the second end cap 213, and the first positioning portion and the second positioning portion are fittingly connected.

In this design, the first end cap 212 includes a first detent, the second end cap 213 includes a second detent, and the first and second end caps 212, 213 achieve the positioning of the second end cap 213 relative to the first end cap 212 by the first and second detents.

EXAMPLE five

According to a third aspect of the present invention, there is provided a household electrical appliance comprising a motor 200 provided by any of the above designs.

Specifically, the household appliances are fan heaters, exhaust fans and fans.

The utility model provides a household electrical appliances, including the motor 200 that any above-mentioned design provided, consequently have this motor 200's whole beneficial effect, no longer describe herein.

EXAMPLE six

In a specific embodiment of the present invention, since the stator winding 130 wound on the stator core 110 and the gap 150 between the stator winding and the stator core 110 often do not satisfy the requirement of the national standard for creepage distance, the present embodiment adds the insulating member 140 between the stator winding 130 and the stator yoke portion 112. Specifically, the insulating member 140 is inserted between the gap 150 between the stator winding 130 and the stator yoke portion 112 of the stator core 110, so that the creepage distance of the stator 100 is satisfied.

Meanwhile, in the assembly process of the motor 200, it is ensured that the insulation 140 is completely contacted by the inner surface of the end cap 210, so that the insulation 140 can isolate the stator winding 130 from the end cap 210. Meanwhile, the height h of the insulating member 140 protruding out of the stator core 110 should be sufficient to ensure the creepage distance between the stator winding 130 and the end cap 210.

The utility model discloses can not carry out big adjustment to original scheme and can solve motor 200 creepage distance problem, simple structure, the manufacturability is good, has shortened development cycle, reduces development cost.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A stator, comprising:

a stator core including a plurality of stator teeth and a stator yoke portion provided separately from the plurality of stator teeth;

an insulating frame disposed on the plurality of stator teeth;

a stator winding provided on the insulating frame, wherein the insulating frame and the stator winding are located on a side of the stator yoke facing the plurality of stator teeth with a gap therebetween;

an insulator disposed in at least a portion of the gap.

2. The stator according to claim 1,

the insulating part penetrates through the gap along the axial direction of the stator core.

3. The stator according to claim 1,

the insulating part is any one or any combination of the following: at least one insulated arc segment and at least one insulated straight segment.

4. A stator according to any one of claims 1 to 3, further comprising:

and the positioning part is arranged on the insulating frame, and the insulating part is in adaptive connection with the positioning part.

5. A stator according to any one of claims 1 to 3, wherein the insulating frame comprises:

a first insulating frame;

and the second insulating frame is detachably arranged on the first insulating frame, and the second insulating frame and the first insulating frame are arranged on one side, close to the stator yoke, of the plurality of stator teeth.

6. The stator according to any one of claims 1 to 3,

adjacent two of the plurality of stator teeth form a stator slot;

the stator further includes:

an insulating paper disposed in at least one of the plurality of stator slots.

7. The stator according to claim 6,

a plurality of stator teeth include a plurality of straight-teeth and a plurality of dogtooths, and every straight-tooth setting is in a plurality of between adjacent two in the dogtooth, wherein, the straight-tooth includes first straight-tooth, and is a plurality of the dogtooth includes first dogtooth, first dogtooth is towards being close to the direction of first straight-tooth is buckled, first straight-tooth with first dogtooth forms first stator groove, insulating paper sets up in the first stator groove.

8. An electric machine, comprising: a stator as claimed in any one of claims 1 to 7.

9. The electric machine of claim 8, further comprising:

an end cap having a fitting cavity in which the stator is mounted, wherein,

the insulator is in contact with the end cap inner diameter.

10. The electric machine of claim 8 or 9, wherein the end cap comprises:

a first end cap;

and the second end cover is detachably connected with the first end cover, and the second end cover and the first end cover form the assembly cavity.

11. The electric machine of claim 10, wherein the end cap further comprises:

a first positioning portion provided at the first end cap;

and the second positioning part is arranged on the second end cover, and the first positioning part is in adaptive connection with the second positioning part.

12. An electric household appliance comprising a motor according to any one of claims 8 to 11.

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