A stator including motor concentrated windings and winding method thereof

Abstract

The present invention discloses a stator including a concentrated winding of a motor and a winding method thereof, belonging to the technical field of motor stators, comprising a tooth head block (1) and a yoke block (2), wherein the tooth head blocks (1) are located on the same circumference, two adjacent tooth head blocks (1) are connected by a yoke block (2), tooth slot surfaces (6) are arranged on both sides of the tooth head blocks (1), and a lead slot (5) is arranged on the yoke block (2). The present invention can effectively avoid damage to the insulation layer when winding the coil, thereby improving product quality, and the coil is wound tightly, thereby improving the slot fill rate; the winding method of the present invention can make the surfaces of adjacent coil windings intersect with each other, thereby making full use of the space in the tooth slots, further improving the slot fill rate of the stator, and improving product quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor stators, and in particular relates to a stator including motor concentrated windings, a stator including motor concentrated windings applied to a stator, and a winding method for manufacturing a stator including motor concentrated windings. Background Art

[0002] The motor stator and rotor are important components of motors such as drive machines. The motor stator and rotor are usually composed of a tooth part and a yoke part, and a coil is arranged in the tooth part. In the prior art, generally, a stator or rotor punching is first made into an integral stamping, and the stator or rotor punching is fixed to each other by welding or other methods, and then the formed stator or rotor is wound and installed. In this way, when winding the coil, the gap in the stator is large and the slot fill rate is low.

[0003] In order to improve the slot filling rate of the stator or rotor, a Chinese invention patent with an application date of August 8, 2019 and an application number of 201910728716.6 discloses a stator core, a wound stator, a concentrated winding motor and a production method, wherein the stator core includes: a yoke structure and a plurality of tooth structures, the yoke structure is divided into a plurality of yoke structure segments having the same number as the tooth structures, each yoke structure segment is connected to each tooth structure by a mortise and tenon connection, and the plurality of yoke structure segments are connected end to end in sequence to form a circular yoke structure, and the plurality of tooth structures are located on the same circumference. The stator core, the wound stator and the concentrated winding motor are detachably installed by separating the tooth structure and the yoke structure of the wound stator, and the yoke structure is prepared by the existing stamping process, which reduces the process difficulty of the existing preparation of the one-piece stator core, reduces the amount of scrapped materials during preparation, and reduces the production cost.

[0004] However, in the above-mentioned stator core, wound stator, concentrated winding motor and production method, since the coil is directly wound on the stator core, the winding is not tight enough, and since insulating layers are provided on both sides of the stator core, the insulating layers are easily damaged during winding, affecting the quality of the motor. Summary of the invention

[0005] The problem to be solved by the present invention is that in the prior art, the coil is directly wound on the stator core, the winding is not tight enough, and the insulation layer is easily damaged during winding, which affects the quality of the motor. A stator including a motor concentrated winding is provided, which is easy to process, will not damage the teeth, and can increase the motor slot fill rate and improve product quality. At the same time, the present invention also provides a winding method for making a stator including a motor concentrated winding.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a stator including a concentrated winding of a motor, including a tooth head block for winding and placing a coil winding and a yoke block for locking and fixing adjacent tooth head blocks, the tooth head block is composed of tooth head punchings, and the yoke block is composed of yoke punchings. The tooth head blocks and the yoke blocks are arranged in a corresponding group, the tooth head blocks are located on the same circumference, and the tooth head blocks adjacent to each other are connected by a yoke block. Tooth groove surfaces are arranged on both sides of the tooth head blocks, and a splicing part is arranged on the tooth groove surface opposite to the yoke block. A winding part is arranged on the tooth groove surface for placing the coil winding, and a lead groove for leading out a wire is arranged on the inner side of the yoke block near the tooth head block.

[0007] As a further improvement measure of the present invention, in the above-mentioned stator including concentrated windings of a motor, the cross-section of the lead slot is set to be semicircular or square.

[0008] As a further improvement measure of the present invention, the above-mentioned stator including a concentrated winding of a motor, the tooth slot surfaces on both sides of the tooth head block are arranged to be inclined, the inner width of the tooth head block is greater than the outer width, and the locking surfaces on both sides of the yoke block are arranged to be inclined, and the locking surfaces cooperate with the splicing parts on the tooth slot surfaces.

[0009] As another improvement measure of the present invention, the above-mentioned stator includes a concentrated winding of a motor, the tooth slot surfaces on both sides of the tooth head block are parallel to each other, the inner width of the tooth head block is equal to the outer width, and the locking surfaces on both sides of the yoke block are arranged to be inclined, and the locking surfaces cooperate with the splicing parts on the tooth slot surfaces.

[0010] As a further improvement measure of the present invention, the above-mentioned stator including the concentrated winding of the motor is provided with a fixing groove on the splicing part, the groove width of the fixing groove is smaller than the internal width of the groove body, and the locking surfaces on both sides of the yoke assembly block are provided with fixing blocks, and the fixing blocks cooperate with the fixing groove.

[0011] As a further improvement measure of the present invention, the above-mentioned stator including the concentrated winding of the motor, the inner surface of the tooth head block is provided with a limiting surface, the limiting surface includes limiting surface one and limiting surface two, the limiting surface one and limiting surface two are arranged in an inclined shape and form an obtuse angle with the corresponding tooth groove surface respectively.

[0012] As another improvement measure of the present invention, in the above-mentioned stator including concentrated windings of a motor, a limiting surface is arranged on the inner surface of the tooth head block, and the limiting surface is arranged in an arc shape.

[0013] As a further improvement measure of the present invention, the above-mentioned stator including the concentrated winding of the motor is provided with a buckle point one on the tooth head punching sheet, and the adjacent tooth head punching sheets are fixedly connected by the buckle point one, and a buckle point two is provided on the yoke punching sheet, and the adjacent yoke punching sheets are fixedly connected by the buckle point two.

[0014] A winding method for manufacturing the above-mentioned stator including the concentrated winding of the motor, the winding method comprising the following steps:

[0015] Step 1, a mold making process; the mold includes a tooth head mold, the tooth head mold and the tooth head block winding part have the same size and shape, a capping mold is arranged at the end of the tooth head mold, a fixing piece is arranged between the tooth head mold and the capping mold, and a mold groove corresponding to the position of the lead groove is arranged on the capping mold;

[0016] Step 2, assembling the mold process; connecting the capping mold to the tooth head mold, and fixing the capping mold to the tooth head mold with a fixing member;

[0017] Step 3, winding coil winding process; install the mold on the winding machine, fix it, embed the lead wire at one end of the winding coil into the mold groove, rotate the mold, so that the wire is wound on the tooth head mold, and when rotating the mold, the mold is raised at the same time, so that the wire covers the surface of the tooth head mold from top to bottom in sequence. When the coil completely covers the surface of the tooth head mold, the mold is lowered, so that the wire continues to rotate on the outer layer of the coil that has been wound, so that the coil continues to cover the inner coil. This cycle is repeated, so that the wire is overlapped and wound on the surface of the tooth head mold, and the windings are arranged tightly.

[0018] Step 4: Cross-wire winding process: When the wire is wound to the last half circle, the wire is diagonally crossed over the coil to the top of the next layer, the position of the outlet end is changed, and the wire is cut off;

[0019] Step 5, demoulding process: loosen the fixing parts, separate the tooth head mold and the capping mold in the mold, and separate the coil wound on the tooth head mold from the tooth head mold;

[0020] Step 6, the coil fixing process: insert the coil wound in the tooth head mold into the tooth head block;

[0021] Step 7, stator splicing process: embed the lead wire into the lead wire slot of the yoke block, and use the yoke block to fix and connect two adjacent tooth head blocks to form a circular stator;

[0022] Step 8, wire management process: collect and merge the lead wires in all lead slots, collect and merge the tail ends of all coils, and merge them according to the phase line requirements of the stator conductors.

[0023] As a further improvement measure of the present invention, in the above-mentioned winding method, in the step 1, the shapes of the upper and lower ends of the tooth head mold also include the shapes of the insulating plates at the two ends of the tooth head assembly.

[0024] Compared with the prior art, the beneficial effects of the present invention are: 1. By arranging the tooth head block and the yoke block, the coil winding that has been wound into shape can be directly inserted into the tooth head block, and then the adjacent tooth head block can be fixed and locked by the yoke block, so that the insulation layer can be avoided from being damaged when winding the coil, thereby improving the product quality, and the above-mentioned coil is wound tightly, which can improve the slot fill rate; 2. By arranging the lead groove on the yoke block, the lead wire at one end of the coil winding is embedded in the lead groove, reducing the ineffective occupancy in the groove and improving the slot fill rate; 3. The winding method of the present invention is first wound on the mold, so that the coil is wound tightly and the slot fill rate can be improved; 4. The winding method of the present invention can make the adjacent coil winding surfaces intersect with each other, which can make full use of the space in the tooth slot and further improve the slot fill rate of the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a top view of the combined state of the tooth head block and the yoke block of the present invention.

[0026] Figure 2 It is a stereoscopic diagram of the combined state of the tooth head block and the yoke block of the present invention.

[0027] Figure 3 It is a top view of the tooth head puzzle of the present invention.

[0028] Figure 4 It is a three-dimensional diagram of the tooth head puzzle of the present invention.

[0029] Figure 5 It is a top view of the yoke puzzle of the present invention.

[0030] Figure 6 It is a three-dimensional view of the yoke puzzle of the present invention.

[0031] Figure 7 It is a top view of the capping mold of the present invention.

[0032] Figure 8 It is a three-dimensional diagram of the capping mold of the present invention.

[0033] Fig. 9 It is a top view of the tooth head mold of the present invention.

[0034] Fig.10 It is a stereoscopic diagram of the tooth head mold of the present invention.

[0035] Fig.11 It is a cross-sectional view of the combined state of the tooth head mold and the capping mold of the present invention.

[0036] Fig.12It is a cross-sectional view of the combined state of the coil, the tooth head block and the yoke block of the present invention.

[0037] Fig.13 It is a flow chart of the winding method.

[0038] Explanation of the accompanying numbers: 1-tooth head block; 2-yoke block; 3-joining part; 4-winding part; 5-lead groove; 6-tooth groove surface; 7-locking surface; 8-fixing groove; 9-fixing block; 10-protrusion one; 11-gap part one; 12-gap part two; 13-protrusion two; 14-buckle point one; 15-buckle point two; 16-tooth head mold; 17-capping mold; 18-mold groove; 19-through hole one; 20-through hole two; 21-groove body; 22-limiting surface one; 23 limiting surface two. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] like Figures 1 to 6 The stator with concentrated winding of the motor shown in the figure comprises a tooth head block 1 for winding and placing the coil winding and a yoke block 2 for locking and fixing the adjacent tooth head blocks 1. The tooth head block 1 is composed of a tooth head punching sheet, on which a buckle point 14 is arranged, and the upper and lower adjacent tooth head punching sheets are fixedly connected by the buckle point 14, that is, the protrusion of the buckle point 14 of the upper tooth head punching sheet is inserted into the groove of the buckle point 14 of the lower tooth head punching sheet, and is pressed and fixed, so that the connection is firm; similarly, the yoke block 2 is composed of a yoke punching sheet, on which a buckle point 2 15 is arranged, and the upper and lower adjacent yoke punching sheets are fixedly connected by the buckle point 2 15. The tooth head blocks 1 are arranged in 12 groups, and the yoke blocks 2 are correspondingly arranged in 12 groups. The tooth head blocks 1 are arranged in a circle on the same circumference, and two adjacent tooth head blocks 1 are connected by a yoke block 2. Tooth groove surfaces 6 are provided on both sides of the tooth head block 1. As a scheme, the tooth groove surfaces 6 on both sides of the tooth head block 1 are arranged to be inclined, and the inner width of the tooth head block 1 is greater than the outer width; as another scheme, the tooth groove surfaces 6 on both sides of the tooth head block 1 are parallel to each other, and the inner width of the tooth head block 1 is equal to the outer width; a splicing part 3 is provided on the tooth groove surface 6 at a position opposite to the yoke block 2 for connecting the yoke block 2, and locking surfaces 7 on both sides of the yoke block 2 are arranged to be inclined, and the locking surfaces 7 cooperate with the inclined surfaces of the splicing part 3 on the tooth groove surface 6; a winding part 4 is provided on the tooth groove surface 6 for placing the coil winding, for placing the coil winding.

[0041] In order to facilitate the connection, a fixing groove 8 is provided on the joint part 3, and the slot width of the fixing groove 8 is smaller than the internal width of the slot body. For example, the cross-sectional shape of the fixing groove 8 is set to be trapezoidal or arc-shaped, and the locking surfaces 7 on both sides of the yoke block 2 are provided with fixing blocks 9, and the fixing blocks 9 match the cross-sectional shape of the fixing groove 8. When in use, the fixing block 9 on one side of the yoke block 2 is aligned with the fixing groove 8 on the joint part 3, and inserted into the tooth head block 1 from top to bottom, so that the yoke block 2 and the tooth head block 1 can be fixed, and the fixing block 9 on the other side is aligned with the fixing groove 8 on the joint part 3 of the adjacent tooth head block 1, and inserted into the tooth head block 1 from top to bottom, so that the adjacent tooth head block 1 can be fixed by the yoke block 2. In this way, the tooth head blocks 1 can be connected to form a circular stator by the yoke block 2.

[0042] A wire lead-out groove 5 for lead-out of the wire is arranged on the inner side surface of the yoke block 2 near the tooth head block 1. The cross-section of the wire lead-out groove 5 is arranged to be semicircular or square to match different coils. The specific shape is determined according to the wire used in the motor. For example, a semicircular shape is used in the present embodiment. The lead-out wire of the wire is arranged in the wire lead-out groove 5. On the one hand, it plays a role in fixing the position of the lead-out wire of the wire. On the other hand, it makes the lead-out wire not occupy the space between the tooth head blocks 1, thereby improving the slot fill rate. At the same time, the yoke block 2 can play a role in limiting the position of the coil.

[0043] The inner surface of the yoke block 2 is provided with a limiting surface, which includes a limiting surface 1 22 and a limiting surface 23. The limiting surface 1 22 and the limiting surface 23 are set to be inclined, and the angle between the limiting surface 1 22 and the limiting surface 23 is an obtuse angle; of course, the limiting surface is set on the inner side of the yoke block 2, and the limiting surface can also be set to an arc shape; setting the limiting surface can play a role in fixing the coil winding. The outer surface of the yoke block 2 is set to an arc shape, so that the entire spliced ​​tooth head block 1 and the yoke block 2 form a circle.

[0044] like Fig.13 As shown, the present invention provides a winding method for manufacturing a stator including a concentrated winding of a motor, comprising step 1, a mold manufacturing process; step 2, a mold assembly process; step 3, a winding coil winding process; step 4, a cross-wire winding process; step 5, a demoulding process; step 6, a coil fixing process; step 7, a stator splicing process; step 8, a wire arrangement process; the specific method is to first manufacture a mold, such as Figure 1 , Figure 2 , Figures 7 to 12As shown, the mold includes a tooth head mold 16 and a capping mold 17. The tooth head mold 16 has the same size and shape as the winding part 4 in the tooth head block 1. The capping mold 17 is fixed at the end of the tooth head mold 16. A groove body 21 is provided at the capping mold 17 opposite to the tooth head mold 16. A through hole 20 is provided on the groove body 21. One end of the tooth head mold 16 is engaged in the groove body 21 of the capping mold 17. A through hole 19 is provided on the tooth head mold 16. An internal thread is provided in the through hole 19. The through hole 19 is opposite to the through hole 20. The screw is passed through the through hole 20 and the through hole 19 to fix the tooth head mold 16 and the capping mold 17. A mold groove 18 corresponding to the position of the lead groove 5 is provided on the capping mold 17 near the tooth head mold 16.

[0045] Then install the mold on the winding machine and fix it, embed the lead wire at one end of the winding coil into the mold groove 18, rotate the mold, and make the wire wind on the tooth head mold 16. When rotating the mold, the mold is raised at the same time, so that the wire covers the surface of the tooth head mold 16 from top to bottom. When the coil covers the surface of the tooth head mold 16, the first layer of coil is formed. At this time, the mold is lowered, and the wire continues to rotate on the outer layer of the first layer of coil that has been wound, so that the coil continues to cover the first layer of coil to form the second layer of coil. Then the mold is raised, and the wire continues to wind around the outside of the second layer of coil to form the third layer of coil. This cycle is repeated, so that the wire overlaps and winds on the surface of the tooth head mold 16, so that the winding is arranged tightly. When the wire is wound to the last half circle, the wire is diagonally crossed over the end of the coil to the top of the outermost layer, the position of the lead end is changed, and the wire is cut off.

[0046] Then loosen the fixing parts, separate the tooth head mold 16 and the cover mold 17 in the mold, separate the coil wound on the tooth head mold 16 from the tooth head mold 16; insert the coils wound in the tooth head mold 16 into the tooth head blocks 1 respectively; use the yoke block 2 to fix and connect the two adjacent tooth head blocks 1, and embed the lead wire into the lead wire slot 5 of the yoke block 2 to form a circular stator. The coil winding obtained by the above method has a convex part 10 formed on one side of the bottom coil of the tooth head block 1 and a gap part 11 formed on the other side, and a gap part 2 12 formed on one side of the upper coil and a convex part 2 13 formed on the other side. In this way, when two adjacent groups of tooth head blocks 1 are combined, a convex part 10 at the bottom of the adjacent coil is opposite to a gap part 11 at the bottom of the other coil, and a gap part 2 12 at the upper part of the adjacent coil is opposite to a convex part 2 13 at the upper part of the other coil. In this way, the space of the slot body between the tooth head blocks 1 can be fully utilized to improve the slot full rate.

[0047] Finally, all the lead wires in the lead slots 5 are collected and merged, and the tail ends of all the coils are collected and merged, and merged according to the phase line requirements of the stator conductors to form a complete stator.

[0048] By using the above method, thicker winding coils, whether round or square, can be wound more tightly without damaging the stator or the wire, thereby increasing the slot fill rate of the stator and improving the quality of the product.

[0049] The above describes the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this field, several modifications and improvements can be made without departing from the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A stator comprising concentrated windings of a motor, characterized in that: The stator comprises a tooth head block (1) for winding and placing a coil winding and a yoke block (2) for locking and fixing adjacent tooth head blocks (1), the tooth head block (1) is composed of tooth head punchings, the yoke block (2) is composed of yoke punchings, the tooth head blocks (1) and the yoke blocks (2) are arranged in 6-48 groups correspondingly, the tooth head blocks (1) are located on the same circumferential line, the adjacent tooth head blocks (1) are connected by the yoke blocks (2), and the The tooth head block (1) is provided with tooth groove surfaces (6) on both sides, a splicing portion (3) is provided on the tooth groove surface (6) at a position opposite to the yoke block (2), a winding portion (4) is provided on the tooth groove surface (6) at a position for placing the coil winding, and a lead groove (5) for leading out a wire is provided on the inner side surface of the yoke block (2) near the tooth head block (1); the tooth groove surfaces (6) on both sides of the tooth head block (1) are arranged in an inclined shape, and the inner side width of the tooth head block (1) is greater than the outer side width. width, the locking surfaces (7) on both sides of the yoke block (2) are arranged in an inclined shape, and the locking surfaces (7) cooperate with the splicing portion (3) on the tooth groove surface (6); or, the tooth groove surfaces (6) on both sides of the tooth head block (1) are parallel to each other, the inner width of the tooth head block (1) is equal to the outer width, the locking surfaces (7) on both sides of the yoke block (2) are arranged in an inclined shape, and the locking surfaces (7) cooperate with the splicing portion (3) on the tooth groove surface (6); the yoke block 2, a limiting surface is provided on the inner surface, the limiting surface includes a limiting surface 1 (22) and a limiting surface 2 (23), and the angle between the limiting surface 1 (22) and the limiting surface 2 (23) is an obtuse angle; or, a limiting surface is provided on the inner surface of the yoke block 2, and the limiting surface is arranged in an arc shape; a buckle point 1 (14) is provided on the tooth head punching sheet, and adjacent tooth head punching sheets are fixedly connected by the buckle point 1 (14); a buckle point 2 (15) is provided on the yoke punching sheet, and adjacent yoke punching sheets are fixedly connected by the buckle point 2 (15).

2. A stator comprising concentrated windings of a motor according to claim 1, characterized in that: The cross section of the lead groove (5) is configured to be semicircular or square.

3. A stator comprising concentrated windings of a motor according to claim 2, characterized in that: A fixing groove (8) is provided on the joint portion (3), the groove width of the fixing groove (8) being smaller than the internal width of the groove body, and fixing blocks (9) are provided on the locking surfaces (7) on both sides of the yoke block (2), and the fixing blocks (9) are matched with the fixing groove (8).

4. A winding method for manufacturing a stator including a concentrated winding of a motor as claimed in any one of claims 1 to 3, characterized in that: The winding method comprises the following steps: Step 1, a mold manufacturing process; the mold comprises a tooth head mold (16), the tooth head mold (16) and the winding portion (4) of the tooth head block (1) are of the same size and shape, a cover mold (17) is arranged at the end of the tooth head mold (16), a fixing piece is arranged between the tooth head mold (16) and the cover mold (17), and a mold groove (18) corresponding to the position of the lead groove (5) is arranged on the cover mold (17); Step 2, assembling the mold; connecting the capping mold (17) to the tooth head mold (16), and fixing the capping mold (17) to the tooth head mold (16) with a fixing member; Step 3, winding process of the winding coil; install the mold on the winding machine, fix it, embed the lead wire at one end of the winding coil into the mold groove (18), rotate the mold, so that the wire is wound on the tooth head mold (16), and when the mold is rotated, the mold is raised at the same time, so that the wire covers the surface of the tooth head mold (16) from top to bottom in sequence. When the coil completely covers the surface of the tooth head mold (16), the mold is lowered, so that the wire continues to rotate on the outer layer of the coil that has been wound, so that the coil continues to cover the inner layer coil, and so on. The cycle is repeated, so that the wire is overlapped and wound on the surface of the tooth head mold (16), and the windings are arranged tightly; Step 4: Cross-wire winding process: When the wire is wound to the last half circle, the wire is diagonally crossed over the end of the coil to the top of the next layer, the position of the outlet end is changed, and the wire is cut off; Step 5, demoulding process; loosen the fixing parts, separate the tooth head mold (16) and the cover mold (17) in the mold, and separate the coil wound on the tooth head mold (16) from the tooth head mold (16); Step six, the coil fixing process: inserting the coil wound in the tooth head mold (16) into the tooth head block (1); Step seven, stator splicing process: embed the lead wire into the lead wire slot (5) of the yoke block (2), and use the yoke block (2) to fix and connect two adjacent tooth head blocks (1) to form a circular stator; Step eight, the wire arrangement process; collect and merge the lead wires in all the lead slots (5), collect and merge the tail ends of all the coils, and merge them according to the phase line requirements of the stator conductors.

5. A winding method according to claim 4, characterized in that: In the above-mentioned step 1, the shapes of the upper and lower ends of the tooth head mold (16) also include the shapes of the insulating plates at the two ends of the tooth head assembly block (1).

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