Stator core and motor

Abstract

The utility model provides a stator iron core and a motor. The stator iron core comprises at least three iron core splicing blocks. Each iron core splicing block comprises a tooth part and a yoke part, the yoke parts of all the iron core splicing blocks enclose to form an outer circle of the stator iron core, each yoke part is provided with a first supporting side part and a second supporting side part, the side edge, far away from the tooth part, of each first supporting side part is provided with a protruding splicing part, and the side edge of each second supporting side part is provided with a second splicing part. A splicing groove is formed in one side, far away from the tooth part, of the yoke part; and the splicing parts have insertion angles and limiting angles relative to the splicing grooves of the adjacent iron core splicing blocks. According to the utility model, the stator iron core is formed by splicing the plurality of iron core splicing blocks, and the plurality of iron core splicing blocks can adopt the same structure, so that the die cost and the types of parts are reduced, and the adjacent iron core splicing blocks can only be embedded or disassembled at a specific angle and are not easy to loosen after being spliced; the splicing groove is not arranged at the abutting position of the two yoke parts, so that the phenomenon that the operation efficiency of the motor is affected due to the fact that a notch is formed between the two yoke parts is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a stator core and motor. BACKGROUND

[0002] Motor (commonly known as "motor") is the electromagnetic device that realizes electric energy conversion or transmission according to electromagnetic induction law, is divided into motor and generator. Motor usually is provided with stator and rotor, and rotor is the part of rotation in motor, and stator is the part of non-rotation when motor works.

[0003] Stator generally includes stator core, stator winding and other components. Stator core has multiple fixing columns, and stator winding is wound on the fixing column of stator core, and rotor is fixed on motor base through bearing or shaft sleeve, and rotor has silicon steel sheet, and the rotor of direct current motor also can be wound with coil, and when motor is in working condition, magnetic field is generated on stator and rotor due to the action of current in coil, to drive rotor to rotate. The main function of stator is to generate rotating magnetic field, and the main function of motor rotor is to be cut by magnetic line in rotating magnetic field and then output current.

[0004] In order to improve the utilization rate of stator core, the slot fill rate of enameled wire winding needs to be improved. The slot fill rate is greatly improved when the block structure stator is wound without wire nozzle entering the slot. At present, the block structure stator usually has multiple structures such as hinge type, pin shaft type, shaft type and the like. Among them, the stator core of the shaft hinge type is improved on the basis of the ordinary block core, the mortise and tenon structure is changed into the shaft structure, so that the two halves of the stator core can rotate around the shaft between each other, the winding process problem is solved, and the blocks can be spliced after winding. However, in order to splice after winding, two blocks with different structures are usually used at both ends of the chain, that is, three kinds of block molds need to be opened for a shaft type chain stator core of one specification, the mold cost is increased, and the material types are increased. Moreover, the shaft structure is located at the middle part of the stator yoke, so that a large gap is formed at one end of the block, the motor loss is increased, and the efficiency is reduced. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the defects and deficiencies in the prior art, and provides a stator core and motor.

[0006] One embodiment of the utility model provides a stator core, which comprises at least three core blocks.

[0007] The iron core blocks comprise tooth portions and yoke portions connected to each other, the yoke portions of all the iron core blocks enclose an outer circle of the stator core, the tooth portions are located on the inner side of the yoke portions towards the outer circle of the stator core, the yoke portions have first support side portions and second support side portions, the first support side portions are provided with protruding splicing portions away from the side edges of the tooth portions, the yoke portions are provided with splicing grooves away from the sides of the tooth portions, the splicing grooves are located at the edges of the second support side portions away from the tooth portions, the splicing grooves have insertion openings, the splicing portions of the iron core blocks extend into the splicing grooves of adjacent iron core blocks and are rotationally matched with the splicing grooves of adjacent iron core blocks.

[0008] Among them, the splicing portion has an insertion angle and a limiting angle relative to the splicing groove of the adjacent iron core block.

[0009] When the splicing portion is at the insertion angle relative to the splicing groove of the adjacent iron core block, the maximum width of the splicing portion relative to the insertion opening is less than or equal to the width of the insertion opening.

[0010] When the splicing portion is at the limiting angle relative to the splicing groove of the adjacent iron core block, the maximum width of the splicing portion relative to the insertion opening is greater than the width of the insertion opening, and the first support side portion and the second support side portion abut each other.

[0011] In some optional embodiments, a positioning groove is formed between the first support side portion and the splicing portion, and a positioning portion is formed between the splicing groove and the second support side portion.

[0012] When the splicing portion is at the limiting angle relative to the splicing groove of the adjacent iron core block, the positioning portion extends into the positioning groove.

[0013] In some optional embodiments, a first curved surface portion is arranged on the surface of the splicing portion, a second curved surface portion is arranged on the inner surface of the splicing groove, and the first curved surface portion and the second curved surface portion are both arranged around the rotation axis of the splicing portion.

[0014] In some optional embodiments, the angles corresponding to the first curved surface portion and the second curved surface portion are both greater than 180°, an avoiding gap connected to the second curved surface portion is formed on the splicing portion, the maximum vertical distance of the surface of the avoiding gap relative to the second curved surface portion is less than the width of the insertion opening, and the avoiding gap extends along the direction of the insertion opening.

[0015] In some optional embodiments, a third curved surface portion is arranged on the inner surface of the positioning groove, and a fourth curved surface portion is arranged on the surface of the positioning portion, and the third curved surface portion and the fourth curved surface portion abut when the splicing portion rotates to the positioning portion extending into the positioning groove.

[0016] In some optional embodiments, an inner surface of the positioning groove is provided with a third curved surface connected with the first curved surface, and a surface of the positioning portion is provided with a fourth curved surface connected with the second curved surface, and the third curved surface and the fourth curved surface abut after the splicing portion extends into the positioning groove.

[0017] In some optional embodiments, a first support plane is formed on the first support side portion, and a second support plane is formed on the second support side portion, and the first support side portion abuts with the second support plane of the second support side portion.

[0018] In some optional embodiments, an extension plane of the first support plane passes through a center of an outer circle of the stator core, and an extension plane of the second support plane passes through the center of the outer circle of the stator core.

[0019] In some optional embodiments, a clamping groove is arranged on a side of the yoke portion away from the tooth portion.

[0020] Another embodiment of the utility model provides a motor, which comprises the stator core as described above.

[0021] Compared with the prior art, the stator core of the utility model is formed by splicing a plurality of core blocks, which solves the winding process problem and can realize a high slot fill rate; the plurality of core blocks can be produced by using the same structure, thereby reducing the mold cost and the part types and greatly improving the motor production capacity and production efficiency; the splicing is simple and beneficial to reducing the loss between the blocks; the adjacent core blocks can only be embedded or disassembled at a specific angle and are not easy to loosen after splicing; since the splicing groove is not arranged on the first support side portion or the second support side portion, the adjacent core blocks are closely attached by the first support side portion or the second support side portion without gaps, the magnetic field can flow well between the adjacent core blocks, and the motor operation efficiency is beneficially avoided from being affected.

[0022] In order to more clearly understand the utility model, the specific embodiments of the utility model will be described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic view of a stator core of an embodiment of the utility model;

[0024] Figure 2 FIG. 2 is a structural schematic view of a core block of an embodiment of the utility model;

[0025] Figure 3Structure schematic view of two iron core splicing blocks of one embodiment of the present utility model in the structure of one of the iron core splicing blocks relative to the splicing groove of the other iron core splicing block is in the insertion angle;

[0026] Figure 4 Structure schematic view of two iron core splicing blocks of one embodiment of the present utility model in the structure of one of the iron core splicing blocks relative to the splicing groove of the other iron core splicing block is in the limiting angle;

[0027] Figure 5 First process schematic view of mutual splicing of the iron core splicing block of one embodiment of the present utility model;

[0028] Figure 6 Second process schematic view of mutual splicing of the iron core splicing block of one embodiment of the present utility model.

[0029] Explanation of reference signs:

[0030] 10, iron core splicing block;20, tooth part;30, yoke part;31, first support side part;311, splicing part;3111, first curved surface part;312, positioning groove;3121, third curved surface part;313, first support plane;314, avoiding notch;32, second support side part;321, splicing groove;3211, insertion port;3212, second curved surface part;322, positioning part;3221, fourth curved surface part;323, second support plane;33, clamping groove. Specific implementation

[0031] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "multiple" is 2 or more than 2, and the meaning of "several" is 1 or more than 1. In addition, unless otherwise specified, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0032] In the description of the utility model, need understanding, the term "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "straight", "horizontal", "top", "bottom", "internal", "external" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore can not be understood as a limitation on the utility model.

[0033] In the description of the utility model, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connecting", "fixing" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or interaction relationship of two elements inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0034] In the description of the utility model, the description of the terms "one embodiment", "some optional implementation" or "some optional embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] Please refer to Figure 1 , one embodiment of the utility model provides a stator core, comprising: at least three core blocks 10.

[0036] Please refer to Figure 2 , the core block 10 includes tooth portion 20 and yoke portion 30 connected with each other, the yoke portion 30 of all core blocks 10 is enclosed to form the outer circle of the stator core, the tooth portion 20 is located at the inner side of the yoke portion 30 towards the outer circle of the stator core, the yoke portion 30 has first support side 31 and second support side 32, the first support side 31 is provided with protruding splicing portion 311 away from the side edge of tooth portion 20, the yoke portion 30 is provided with splicing groove 321 away from the side of tooth portion 20, and splicing groove 321 is located at the edge of second support side 32 away from tooth portion 20. Splicing groove 321 has insertion port 3211, the splicing portion 311 of the core block 10 extends into the splicing groove 321 of the adjacent core block 10, and is rotationally matched with the splicing groove 321 of the adjacent core block 10.

[0037] Please refer to Figure 3 andFigure 3 Wherein, the splicing part 311 has an insertion angle and a limiting angle relative to the splicing groove 321 of the adjacent core block 10.

[0038] When the splicing part 311 is at the insertion angle relative to the splicing groove 321 of the adjacent core block 10, the maximum width of the splicing part 311 relative to the insertion port 3211 is less than or equal to the width of the insertion port 3211, at this time, the splicing part 311 of the core block 10 can only be inserted into the splicing groove 321 of the adjacent core block 10 through the insertion port 3211, or separated from the splicing groove 321 of the adjacent core block 10 through the insertion port 3211.

[0039] When the splicing part 311 is at the limiting angle relative to the splicing groove 321 of the adjacent core block 10, the maximum width of the splicing part 311 relative to the insertion port 3211 is greater than the width of the insertion port 3211, and the first support side 31 and the second support side 32 abut each other, at this time, the two core blocks 10 are spliced, and when all the core blocks 10 are spliced, the first support side 31 and the second support side 32 of any two adjacent core blocks 10 abut each other.

[0040] Please refer to Figures 3 to 6When the two iron core blocks 10 are spliced, one of the iron core blocks 10 is adjusted to an angle such that the splicing part 311 thereof is at an insertion angle relative to the splicing groove 321 of the other iron core block 10, and then the splicing part 311 is inserted into the splicing groove 321, and then the iron core block 10 is rotated such that the splicing part 311 is rotated relative to the splicing groove 321 until the splicing part 311 of one of the iron core blocks 10 is at a limiting angle relative to the splicing groove 321 of the other iron core block 10, at which time it is difficult for the splicing part 311 to be separated from the insertion opening 3211 due to the maximum width of the splicing part 311 relative to the insertion opening 3211 being greater than the width of the insertion opening 3211, thereby being able to stably limit the positions of the two iron core blocks 10. The above steps are repeated until all the iron core blocks 10 are spliced in sequence to form a chain of iron core blocks 10, at which time the iron core block 10 at the head and the iron core block 10 at the tail of the chain of iron core blocks 10 need to be spliced, and in the present embodiment, the splicing part 311 of the iron core block 10 at the head and the splicing groove 321 of the iron core block 10 at the tail are taken as an example to be spliced. Since the chain of iron core blocks 10 has formed a substantially circular shape as a whole at this time, it can be difficult for the splicing part 311 of the iron core block 10 at the head to be inserted into the splicing groove 321 of the iron core block 10 at the tail at the insertion angle, at which time the splicing part 311 of the iron core block 10 at the head is rotated as much as possible to approach the insertion angle relative to the splicing groove 321 of the iron core block 10 at the tail, and then the splicing part 311 of the iron core block 10 at the head is pressed into the splicing groove 321 of the iron core block 10 at the tail in a manner of interference fit, at which time the splicing part 311 is extruded into the splicing groove 321, and then the splicing part 311 of the iron core block 10 at the head and the splicing groove 321 of the iron core block 10 at the tail can be spliced. At this time, the splicing part 311 of any one of the iron core blocks 10 is at the limiting angle relative to the splicing groove 321 of the adjacent iron core block 10, and if the splicing part 311 of any one of the iron core blocks 10 needs to be separated from the splicing groove 321 of the adjacent iron core block 10, a large enough force needs to be applied to extrude the splicing part 311 out of the insertion opening 3211, and therefore the splicing part 311 can be well matched with the splicing groove 321 to stably splice all the iron core blocks 10.

[0041] Since the splicing groove 321 is not arranged at the first support side 31 and the second support side 32, and is not located at the abutting position between the two yoke parts 30, the gap between the two yoke parts 30 is avoided to affect the operating efficiency of the motor.

[0042] In some optional embodiments, a positioning groove 312 is formed between the first supporting side 31 and the splicing part 311, and a positioning part 322 is formed between the splicing groove 321 and the second supporting side 32; when the splicing part 311 is at a limiting angle relative to the splicing groove 321 of the adjacent core block 10, the positioning part 322 extends into the positioning groove 312, and the adjacent core blocks 10 are positioned relative to each other through the positioning part 322 and the positioning groove 312, which is beneficial to improve the structural stability.

[0043] In some optional embodiments, the surface of the splicing part 311 is provided with a first curved part 3111, and the inner surface of the splicing groove 321 is provided with a second curved part 3212; the first curved part 3111 and the second curved part 3212 are arranged around the rotation axis of the splicing part 311; when the splicing part 311 and the splicing groove 321 rotate relative to each other, the first curved part 3111 and the second curved part 3212 slide relative to each other, which is beneficial to improve the smoothness of the relative rotation of the splicing part 311 and the splicing groove 321, and makes the fit between the splicing part 311 and the splicing groove 321 higher, which is beneficial to improve the structural stability and the motor efficiency.

[0044] In some optional embodiments, the angles corresponding to the first curved part 3111 and the second curved part 3212 are both greater than 180°; the splicing part 311 is formed with an avoiding gap 314 connected to the second curved part 3212; the maximum perpendicular distance from the surface of the avoiding gap 314 to the second curved part 3212 is less than the width of the insertion port 3211; when the splicing part 311 is at an insertion angle relative to the splicing groove 321 of the adjacent core block 10, the avoiding gap 314 extends along the direction of the insertion port 3211, and at this time, the splicing part 311 is conveniently inserted through the insertion port 3211.

[0045] In some optional embodiments, the inner surface of the positioning groove 312 is provided with a third curved part 3121, and the surface of the positioning part 322 is provided with a fourth curved part 3221; after the splicing part 311 rotates to the positioning part 322 extending into the positioning groove 312, the third curved part 3121 and the fourth curved part 3221 abut, which is beneficial to reduce the friction between the positioning part 322 and the positioning groove 312, improve the fit between the positioning part 322 and the positioning groove 312, and improve the motor efficiency.

[0046] Since the core blocks 10 need to rotate relative to each other, in the present embodiment, the third curved part 3121 is connected with the first curved part 3111, which is beneficial to reduce the corners between the splicing part 311, the positioning groove 312 and the first supporting side 31; the fourth curved part 3221 is connected with the second curved part 3212, which is beneficial to reduce the corners between the splicing groove 321, the positioning part 322 and the second supporting side 32, and further makes the core blocks 10 not easy to knock, scratch and jam when rotating relative to each other.

[0047] In some optional embodiments, the first support side 31 is formed with a first support plane 314, the second support side 32 is formed with a second support plane 323, and the first support side 31 abuts against the second support plane 323 of the second support side 32, so that the yoke 30 of the adjacent core block 10 is more stable when abutting against each other.

[0048] In some optional embodiments, the extension plane of the first support plane 314 passes the center of the outer circle of the stator core, and the extension plane of the second support plane 323 passes the center of the outer circle of the stator core, so that the first support plane 314 and the second support plane 323 are not easy to interfere with each other when the two core blocks 10 are spliced, avoiding the situation that the splicing fails and is stuck, especially when the splicing part 311 of the core block 10 at the head is inserted into the splicing groove 321 of the core block 10 at the tail, the core block 10 at the head is limited in angle by the adjacent core block 10, and the core block 10 at the tail is also limited in angle by the adjacent core block 10, at this time, the stuck situation is more likely to occur, and the first support plane 314 and the second support plane 323 are not easy to interfere with each other, which is beneficial to make the splicing more smooth, and after the splicing is completed, the first support plane 314 and the second support plane 323 are more stable under stress.

[0049] In some optional embodiments, the yoke 30 is provided with a clamping groove 33 on the side away from the tooth 20. The yoke 30 can be provided with the clamping groove 33 and the avoiding notch 314 at the same time, of course, it can also be provided with the clamping groove 33 or the avoiding notch 314 alone. In assembly, the outer side of the stator core is usually provided with a limiting sleeve, a limiting ring or other limiting structure, so that the core blocks 10 are more closely attached to each other, in this embodiment, the limiting sleeve is sleeved outside the stator core, in order to avoid the rotation of the limiting sleeve relative to the stator core, the clamping block is arranged in the inside of the limiting sleeve, the clamping block is inserted into the clamping groove 33 and / or the avoiding notch 314, thereby improving the assembly stability between the stator core and the limiting sleeve, and avoiding the rotation of the stator core relative to the limiting sleeve. In addition, when the clamping block is inserted into the avoiding notch 314, the splicing part 311 can also be pressed in the splicing groove 321, thereby improving the splicing stability of the core blocks 10.

[0050] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A stator core characterized by, The application relates to a stator core, which comprises at least three core blocks. The core blocks comprise tooth portions and yoke portions connected with each other, the yoke portions of all the core blocks enclose an outer circle of the stator core, the tooth portions are located on the inner side of the yoke portions towards the outer circle of the stator core, the yoke portions have first support side portions and second support side portions, the first support side portions are provided with protruding joint portions away from the side edges of the tooth portions, the yoke portions are provided with joint grooves away from the tooth portions, the joint grooves are located at the edges of the second support side portions away from the tooth portions, the joint grooves have insertion openings, the joint portions of the core blocks are inserted into the joint grooves of adjacent core blocks and are rotationally matched with the joint grooves of the adjacent core blocks. The joint portions have an insertion angle and a limiting angle relative to the joint grooves of the adjacent core blocks. When the joint portions are at the insertion angle relative to the joint grooves of the adjacent core blocks, the maximum width of the joint portions relative to the insertion openings is less than or equal to the width of the insertion openings. When the joint portions are at the limiting angle relative to the joint grooves of the adjacent core blocks, the maximum width of the joint portions relative to the insertion openings is greater than the width of the insertion openings, and the first support side portions and the second support side portions abut each other. Positioning grooves are formed between the first support side portions and the joint portions, and positioning portions are formed between the joint grooves and the second support side portions.

2. A stator core according to claim 1, characterized in that: When the joint portions are at the limiting angle relative to the joint grooves of the adjacent core blocks, the positioning portions are inserted into the positioning grooves. The surfaces of the joint portions are provided with first curved portions, and the inner surfaces of the joint grooves are provided with second curved portions, the first curved portions and the second curved portions are arranged around the rotation axis of the joint portions.

3. A stator core according to claim 1, characterized in that: The angles corresponding to the first curved portions and the second curved portions are greater than 180 degrees, the joint portions are provided with avoiding notches connected to the second curved portions, the maximum vertical distance between the surfaces of the avoiding notches and the second curved portions is less than the width of the insertion openings, and the avoiding notches extend along the direction of the insertion openings when the joint portions are at the insertion angle relative to the joint grooves of the adjacent core blocks.

4. A stator core according to claim 3, characterized in that: The inner surfaces of the positioning grooves are provided with third curved portions, and the surfaces of the positioning portions are provided with fourth curved portions, the third curved portions and the fourth curved portions abut each other when the joint portions are rotated to the position where the positioning portions are inserted into the positioning grooves.

5. A stator core according to claim 2, characterized in that: First support planes are formed on the first support side portions, and second support planes are formed on the second support side portions, and the first support side portions abut the second support side portions through the first support planes and the second support planes.

6. A stator core according to any one of claims 1 to 5, characterized in that: The extension planes of the first support planes pass through the center of the outer circle of the stator core, and the extension planes of the second support planes pass through the center of the outer circle of the stator core.

7. A stator core according to claim 6, characterized in that: The yoke portions are provided with clamping grooves away from the tooth portions.

8. A stator core according to any one of claims 1 to 5, characterized in that: The application further relates to a stator core as claimed in any one of claims 1 to 8.

9. An electric machine characterized by ​ ​

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