CN111224491A

CN111224491A - Insulating frame strip of motor stator, motor stator and motor

Info

Publication number: CN111224491A
Application number: CN201811420282.5A
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: 2018-11-26
Filing date: 2018-11-26
Publication date: 2020-06-02

Abstract

The invention relates to the technical field of motor stators, and provides an insulating frame strip of a motor stator, the motor stator and a motor. Wherein motor stator's insulating frame strip includes the frame strip body, is formed with the wire winding that extends along frame strip body length direction at the first side of frame strip body and leads to the groove, and the second side is formed with the spacing piece, and frame strip body and spacing piece structure do: when the frame strip body is installed to the tooth's socket of piecemeal iron core, along the axial of piecemeal iron core, form spacing cooperation between locating part and the piecemeal iron core, frame strip body both ends are the relative piecemeal iron core both ends terminal surface protrusion. This kind of insulating frame strip can be so that form the wind channel between winding and piecemeal iron core, and the plastic frame who inserts about the adoption that exists among the solution prior art is insulated, and stator winding is wrapped up by insulating frame, the poor problem of piecemeal motor heat dissipation condition. In addition, the insulating frame strip has a simple structure, and a die for preparing the insulating frame strip can be greatly simplified, so that the preparation difficulty and the preparation cost are reduced.

Description

Insulating frame strip of motor stator, motor stator and motor

Technical Field

The invention relates to the technical field of motor stators, in particular to an insulating frame strip of a motor stator, the motor stator and a motor.

Background

The block motor is greatly used and popularized in a small-power motor for household appliances due to good manufacturability and production efficiency; however, the motor stator of the existing block motor basically adopts an insulation frame made of plastic materials and inserted up and down. Referring to fig. 1 and 2, the segmented core of the motor stator includes a plurality of segmented cores that are matched with each other along a circumferential direction of the electronic stator. Referring to fig. 3 and 4, the upper frame and the lower frame are mounted to the tooth grooves through both ends of the block cores. Fig. 5 shows an assembly diagram of a stator of an electric machine, which includes a segmented core, an insulating frame, and a winding. Because the winding of stator is wrapped up by insulating frame, the block motor heat dissipation condition is poor, even increase radiator fan on the rotor, also there is not obvious effect, leads to the block motor cost on the high side like this, is difficult to further promote.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

One of the objects of the invention is: the utility model provides a motor stator's insulating frame strip, when the plastic frame who inserts about the adoption that exists among the prior art comes the insulation, the winding is wrapped up by insulating frame, and then leads to the poor technical problem of piecemeal motor heat dissipation condition.

In order to achieve the purpose, the invention provides an insulating frame strip of a motor stator, which comprises a frame strip body, wherein a winding through groove extending along the length direction of the frame strip body is formed on the first side of the frame strip body, a limiting piece is formed on the second side of the frame strip body, and the frame strip body and the limiting piece are structured as follows: when the frame strip body is installed to the tooth socket of the blocking iron core, along the axial direction of the blocking iron core, a limiting fit is formed between the limiting part and the blocking iron core, and the two ends of the frame strip body are opposite to the end faces of the two ends of the blocking iron core.

According to an embodiment of the present invention, the limiting members are limiting steps formed at two ends of the frame strip body, and the limiting steps and end surfaces of two ends of the segmented iron core form a limiting fit.

According to an embodiment of the present invention, the limiting member is a limiting protrusion, and the limiting protrusion forms a limiting fit with the limiting groove on the segmented core.

According to an embodiment of the present invention, the second side of the frame strip body is further formed with a first clamping portion, and the first clamping portion is configured to: when the frame strip body is installed to the tooth's socket of piecemeal iron core, second joint portion looks block on first joint and the piecemeal iron core.

According to an embodiment of the invention, the first clamping portion is a clamping strip or a groove with a length direction parallel to the winding through groove.

The technical scheme of the invention has the following advantages: the insulating frame strip of the motor stator enables an air channel to be formed between the winding and the block iron core, and solves the problems that in the prior art, the plastic frame which is inserted up and down is adopted for insulation, the stator winding is wrapped by the insulating frame, and the block motor is poor in heat dissipation condition. In addition, the insulating frame strip has a simple structure, and a die for preparing the insulating frame strip can be greatly simplified, so that the preparation difficulty and the preparation cost are reduced.

Another object of the invention is: the utility model provides a motor stator, includes a plurality of piecemeal iron cores that set up along circumference, every the piecemeal iron core includes yoke portion and tooth portion, the tooth portion includes tooth portion body and pole shoe, be formed with two tooth spaces between yoke portion and the tooth portion, two the tooth space distribute in tooth portion body both sides, every all install above-mentioned motor stator's insulated frame strip in the tooth space, two install the winding between the insulated frame strip, the winding with be formed with the wind channel between the both ends face of iron core.

According to one embodiment of the invention, the yoke part and the pole shoe of the segmented iron core are provided with second clamping parts.

According to one embodiment of the invention, two tooth slots are symmetrically distributed on both sides of the tooth body.

Another object of the invention is: a motor is provided, which comprises the motor stator and a motor rotor rotatably arranged in the motor stator.

According to one embodiment of the invention, the rotor is provided with fan blades at positions corresponding to the air duct.

Drawings

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

FIG. 1 is an assembled schematic view of a prior art segmented core;

FIG. 2 is a schematic structural view of a prior art segmented core;

FIG. 3 is a schematic view of the assembly process of the prior art insulating frame and the segmented core;

FIG. 4 is a schematic view of the assembly of a prior art insulating frame and a segmented core;

FIG. 5 is a schematic view of a prior art motor stator configuration;

FIG. 6 is a schematic view showing the assembly of a segmented core according to the first embodiment;

fig. 7 is a schematic view illustrating an assembling process of the segmented iron core and the insulative frame strips according to the first embodiment;

fig. 8 is a schematic view of the assembly of the segmented iron core, the insulating frame strips and the winding according to the first embodiment;

fig. 9 is a schematic structural view of an insulative frame strip according to the first embodiment;

fig. 10 is a schematic structural view of an insulating frame strip according to the first embodiment

Fig. 11 is a schematic structural view of a segmented core according to the first embodiment;

fig. 12 is a schematic view of the assembly between the segmented iron core and the insulating frame strips according to the first embodiment;

fig. 13 is a schematic perspective view of a motor according to the first embodiment;

fig. 14 is a schematic sectional view of a motor according to the first embodiment;

in the figure: 1. partitioning the iron core; 101. a yoke portion; 102. a tooth body; 103. a pole shoe; 104. a tooth socket; 2. an insulating frame; 201. an upper frame; 202. a lower frame; 3. a winding; 4. clamping the strip; 5. an insulating frame strip; 6. a groove; 7. a limiting step; 8. a winding through groove; 9. a motor rotor; 10. a fan blade; 11. an air duct.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. 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 description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships that, without particular explanation, are based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 6, the segmented core 1 includes a yoke portion 101 and a tooth portion. Wherein the tooth comprises a tooth body 102 and a pole shoe 103. Slots 104 are formed between the yoke 101 and the teeth, and the insulating frame strip 5 is fixed in the slots 104. Two tooth grooves 104 are disposed on two sides of the tooth portion body 102, so that the two tooth grooves 104 are generally symmetrically disposed on two sides of the tooth portion body 102, and when the two insulative frame strips 5 are respectively fixed to the tooth grooves 104 on two sides of the tooth portion body 102, the winding 3 can be wound between the two insulative frame strips 5. Thus, the two insulating frame strips 5 serve as the insulating frame 2 in the conventional art. Since the two sides of the insulated frame strip 5 of the tooth portion 102 can adopt the same structure, the insulated frame strip 5 of the first embodiment requires fewer production modules compared to the conventional insulated frame 2 (including the upper frame 201 and the lower frame 202 with different structures).

Please refer to fig. 7 for the cooperation between the insulated frame strips 5 and the segmented iron cores 1 of the stator of the motor according to the first embodiment. It can be seen from fig. 7 that the first side of the frame strip body is formed with a winding through slot 8 extending along the length direction of the frame strip body, and the second side is formed with a stopper. The second side of the frame strip body refers to a side which is assembled with the tooth slot 104, that is, a side which is contacted with the tooth slot 104; and the first side of the frame strip body refers to the other side opposite to the second side.

The assembly relationship between the frame strip body and the segmented iron core 1 and the assembly relationship between the frame strip body and the winding 3 are shown in fig. 8.

Wherein, the locating part structure of frame strip body and second side does: when the frame strip body is installed to the tooth socket 104 of the segmented iron core 1, along the axial direction of the segmented iron core 1 (i.e. arrow direction in fig. 8), the limiting piece and the segmented iron core 1 form a limiting fit, and two ends of the frame strip body protrude from two end faces of the segmented iron core 1. Because spacing cooperation is formed between spacing piece and the piecemeal iron core 1 on the axial along piecemeal iron core 1, and then can prevent along the axial of piecemeal iron core 1, the frame strip body is drunkenness from top to bottom along tooth's socket 104. In addition, because frame strip body both ends are 1 both ends terminal surface protrusion of piecemeal iron core relatively, and then after winding 3 installed, form wind channel 11 between winding 3 and piecemeal iron core 1, solve the adoption that exists among the prior art and come the insulation to the plastic frame who inserts from top to bottom, stator winding 3 is wrapped up by insulating frame 2, the poor problem of piecemeal motor heat dissipation condition.

Wherein, the protruding part of 1 both ends terminal surface of piecemeal iron core is relatively divided at frame strip body both ends can design according to the product creepage distance requirement. And the end faces of both ends of the segmented core 1 are referred to as the upper end face and the shielded lower end face in fig. 7 and 8.

In fig. 9 and 10, the limiting members are limiting steps 7 formed at two ends of the frame strip body. Furthermore, when the frame strip body is mounted to the tooth slot 104, the limiting step 7 forms a limiting fit with the end faces of the two ends of the segmented iron core 1, please refer to fig. 8.

Further, can be formed with first joint portion at the second side of frame strip body, first joint portion structure is: when the frame strip body is installed to the tooth's socket 104 of blocking iron core 1, the second joint portion looks block on first joint and the blocking iron core 1. Furthermore, through set up first joint portion on the frame strip body, can further guarantee the block between frame strip body and the piecemeal iron core 1.

Referring to fig. 11 and 12, the first clamping portion is a clamping strip 4 or a groove 6 with a length direction parallel to the winding through slot 8. Furthermore, the first engaging portion can prevent the frame strip body from being withdrawn from the slot 104 along the opening direction of the slot 104. Of course, the structure and distribution of the first clamping portion are not limited by the examples herein, as long as a reliable fit can be formed between the first clamping portion and the segmented iron core 1.

When the first clamping portion is the groove 6, please refer to fig. 11 and 12, the second clamping portion on the segmented iron core 1 is the clamping strip 4 correspondingly disposed. Furthermore, the insulated frame strip 5 is extruded into the tooth slot 104, and the clamping strip 4 on the segmented iron core 1 enters the groove 6 on the frame strip body.

In fig. 11, the clamping strips 4 on the segmented iron core 1 are arranged at the positions of the yoke portion 101 and the pole shoe 103, which are equivalently arranged on two corresponding side walls of the tooth slots 104, so that the insulating frame strips 5 can be reliably clamped between the yoke portion 101 and the pole shoe 103.

It should be mentioned that, when the first engaging portion is the groove 6 and the second engaging portion is the engaging strip 4, the extending direction and the distribution position of the groove 6 and the engaging strip 4 are not limited by the above examples. For example, the groove 6 and the clip strip 4 may be perpendicular to the extending direction of the winding through slot 8, or may form any angle with the extending direction of the winding through slot 8.

In the first embodiment, a motor stator is further provided, please refer to fig. 13 and 14 (fig. 13 and 14 also show a motor rotor 9), which includes a plurality of segmented cores 1 arranged along the circumferential direction. Each of the segmented cores 1 includes a yoke portion 101 and a tooth portion including a tooth portion body 102 and a pole shoe 103. Two tooth slots 104 are formed between the yoke 101 and the tooth, and the two tooth slots 104 are distributed on both sides of the tooth body 102. Each tooth slot 104 is provided with an insulating frame strip 5 of the motor stator, a winding 3 is arranged between the two insulating frame strips 5, and an air duct 11 is formed between the winding 3 and two end faces of the iron core. The arrows in fig. 13 and 14 indicate the position of the air duct 11 and the direction of the air flow in the air duct 11.

Further, the first embodiment further provides a motor, please refer to fig. 13 and fig. 14, including the above-mentioned motor stator, and a motor rotor 9 rotatably disposed in the motor stator. The motor can be a direct current motor or an alternating current motor.

In the first embodiment, a fan blade 10 is installed on the motor rotor 9 at a position corresponding to the air duct 11. Because the air ducts 11 are formed at the two ends of the block iron core 1, the two ends of the motor rotor 9, which are located at the block iron core 1, can be provided with the fan blades 10. And then when the rotor rotates, the fan blades 10 are driven to rotate and generate air flow, the direction of the air flow refers to the arrow direction in fig. 13 and 14, and the air flow passes through the air duct 11 between the winding 3 and the segmented iron core 1 to take away the heat of the motor winding 3. Practical comparative tests show that the motor of the first embodiment can reduce the temperature rise by 10K-15K.

The structural form and the number of the fan blades 10 are not limited, and the fan blades 10 can contribute to heat dissipation of the winding 3 only in the rotating process of the motor rotor 9.

In fig. 13 and 14, the height of the fan blade 10 is substantially equal to the height of the air duct 11, so that the fan blade 10 rotates to drive air to completely pass through the air duct 11.

Example two

The difference from the first embodiment lies in that, in the second embodiment, the limiting member is a limiting protrusion. The insulating frame strip of the motor stator in the second embodiment has the same structure as that in the first embodiment, and thus, the description thereof is omitted.

A limiting groove is formed in the blocking iron core, and then the limiting protrusions on the second side of the frame strip body are installed in the limiting groove, so that the limiting protrusions and the limiting grooves of the blocking iron core are matched in a limiting mode along the axial direction of the blocking iron core, and the insulating frame strip is prevented from moving up and down along the axial direction of the blocking iron core.

Of course, when the limiting member is a limiting protrusion, the matching between the blocking iron core and the limiting protrusion is not necessarily a limiting groove, and may be another limiting protrusion or a limiting step.

When the locating part adopts spacing protruding, the simple structure of insulating frame strip, the cost of manufacture is low.

It is worth mentioning that, when the locating part is spacing protruding and correspond on the piecemeal iron core to set up with spacing protruding complex spacing groove, then this spacing arch and spacing groove except can preventing the insulating frame strip along piecemeal iron core axial float, also can be used for realizing the chucking between insulating frame strip and the piecemeal iron core, prevent the relative movement of insulating frame strip and other directions of piecemeal iron core. That is, the limiting projection and the limiting groove in the second embodiment are the same as the limiting step 7 in the first embodiment to combine the first engaging portion and the second engaging portion.

Wherein, the quantity, the structure and the distribution position of the limiting bulges and the limiting grooves are not limited. Similarly, when the structure matched with the limiting protrusion on the segmented iron core is a structure outside the limiting groove, the number, structure and distribution position of the limiting protrusion and the structure matched with the limiting protrusion are not limited.

Of course, the limiting member is not limited by the above examples, and any structure for achieving the limiting disclosed in the prior art is included in the scope of the limiting member in the present application.

The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims

1. The utility model provides an insulating frame strip of motor stator which characterized in that, includes the frame strip body the first side of frame strip body is formed with along the wire winding logical groove that frame strip body length direction extends, and the second side is formed with the spacing piece, frame strip body and spacing piece structure are: when the frame strip body is installed to the tooth socket of the blocking iron core, along the axial direction of the blocking iron core, a limiting fit is formed between the limiting part and the blocking iron core, and the two ends of the frame strip body are opposite to the end faces of the two ends of the blocking iron core.

2. The insulating frame strip for motor stators of claim 1, wherein the position-limiting members are position-limiting steps formed at both ends of the frame strip body, and the position-limiting steps form a position-limiting fit with both end faces of the segmented iron core.

3. The insulating frame strip for motor stators as claimed in claim 1, wherein the position-limiting member is a position-limiting protrusion, and the position-limiting protrusion forms a position-limiting fit with the position-limiting groove on the segmented core.

4. The insulating frame strip for the stator of the motor according to any one of claims 1 to 3, wherein a first engaging portion is further formed on the second side of the frame strip body, and the first engaging portion is configured to: when the frame strip body is installed to the tooth's socket of piecemeal iron core, second joint portion looks block on first joint and the piecemeal iron core.

5. The insulating frame strip of the motor stator according to claim 4, wherein the first clamping portion is a clamping strip or a groove with a length direction parallel to the winding through groove.

6. A motor stator is characterized by comprising a plurality of block iron cores arranged along the circumferential direction, wherein each block iron core comprises a yoke part and a tooth part, each tooth part comprises a tooth part body and a pole shoe, two tooth grooves are formed between the yoke part and the tooth part and distributed on two sides of the tooth part body, insulating frame strips of the motor stator as claimed in any one of claims 1 to 5 are installed in each tooth groove, a winding is installed between the two insulating frame strips, and an air duct is formed between the winding and two end faces of each iron core.

7. The motor stator as claimed in claim 6, wherein the yoke part and the pole shoe of the segmented core are formed with second catching parts.

8. The motor stator of claim 6, wherein two of said tooth slots are symmetrically disposed on either side of said tooth body.

9. An electrical machine comprising a machine stator according to any one of claims 6 to 8, and a machine rotor rotatably disposed within the machine stator.

10. The motor of claim 9, wherein fan blades are mounted on the rotor at positions corresponding to the air ducts.