Stator lamination, motor stator, method of winding and motor

Abstract

The application provides a kind of stator lamination, motor stator, winding method and motor, it is related to the technical field of motor, the stator lamination includes first stator lamination and second stator lamination, and the first stator lamination and the second stator lamination extend along the first direction;The first stator lamination includes first linear yoke part and a plurality of first linear tooth parts spaced apart along the first direction of the first linear yoke part;The second stator lamination includes second linear yoke part and a plurality of second linear tooth parts spaced apart along the first direction of the second linear yoke part.The stator lamination provided by the application includes two rows of opposite first stator lamination and second stator lamination splicing to form, so as to improve the utilization rate of core material, reduce the production cost.

Description

Technical Field

[0001] This invention relates to the technical field of electric motors, and in particular to a stator lamination, a motor stator, a winding method, and an electric motor. Background Technology

[0002] The stator of the external rotor motor used in existing two-wheeled electric vehicles adopts a winding and stamping form, which results in low utilization of iron core material. This type of iron core is wound using a flying fork winding machine, resulting in low stator winding slot fill factor and slightly low motor efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide stator laminations, motor stators, winding methods, and motors to alleviate the technical problem of low utilization rate of core materials.

[0004] The present invention provides a stator lamination, including a first stator lamination and a second stator lamination, wherein both the first stator lamination and the second stator lamination extend along a first direction; The first stator lamination includes a first linear yoke portion and a plurality of first linear teeth portions spaced apart along a first direction of the first linear yoke portion; The second stator lamination includes a second straight yoke portion and a plurality of second straight teeth portions spaced apart along a first direction of the second straight yoke portion; Furthermore, the first straight yoke and the second straight yoke are arranged in parallel, and the first straight tooth and the second straight tooth are arranged in parallel and alternately; Two first toothed shoe portions are provided at one end of the first straight tooth portion away from the first straight yoke portion, and the two first toothed shoe portions are located at both ends of the first straight tooth portion in a first direction. Two second toothed shoe portions are provided at one end of the second straight tooth portion away from the second straight yoke portion, and the two second toothed shoe portions are located at both ends of the second straight tooth portion in the first direction; The first stator lamination and the second stator lamination can be separated from each other, and one or more first stator laminations and / or one or more second stator laminations can be spliced ​​together to form a stator lamination; multiple stator laminations can be stacked to form a stator core; The first direction is the length direction of the stator lamination.

[0005] In an optional embodiment, a first winding groove is formed between adjacent first straight teeth, and a second winding groove is formed between adjacent second straight teeth. A portion of the first straight teeth is disposed in the second winding groove, and a portion of the second straight teeth is disposed in the first winding groove. In an optional embodiment, the first stator lamination and the second stator lamination are the same size and shape.

[0006] In an optional embodiment, a first upper welding side is provided on the side of the first toothed shoe portion away from the adjacent first toothed shoe portion; and a first lower welding side matching the first upper welding side is provided on the first straight tooth portion.

[0007] In an optional embodiment, a second upper welding side is provided on the side of the second toothed shoe portion away from the adjacent second toothed shoe portion; a second lower welding side matching the second upper welding side is provided on the second straight tooth portion.

[0008] In an optional embodiment, both the first straight yoke and the second straight yoke are provided with a stacked protrusion structure.

[0009] The stator laminations provided by this invention are formed by splicing together two rows of opposing first stator laminations and second stator laminations, which helps to improve the utilization rate of core materials and reduce production costs.

[0010] The present invention provides a motor stator, including a stator core, wherein the stator core includes a plurality of stator laminations; the stator laminations are formed by splicing together one or more first stator laminations of any one of the foregoing embodiments and / or one or more second stator laminations of any one of the foregoing embodiments. Multiple first straight teeth and / or multiple second straight teeth are stacked to form a winding tooth, and multiple first toothed shoe portions and / or multiple second toothed shoe portions are stacked to form a press-fit structure.

[0011] This invention provides a method for winding a motor stator as described in the foregoing embodiments, comprising the following steps: S1: Place the stator core on the winding fixture, the positioning fixture rises and inserts into the winding teeth of the stator core, and the positioning fixture is located on the side of the winding teeth away from the pressing structure. S2: The insulating frame is fitted onto the winding teeth and abuts against the positioning fixture, with the pressing structure located inside the insulating frame; S3: The coil winding is formed by winding outside the insulating frame. The positioning fixture is lowered and the insulating frame is pressed into the winding teeth by the pressing fixture, so that the pressing structure extends out from inside the insulating frame. S4: Bend the crimped structure and bring it into contact with the insulating frame.

[0012] The present invention provides a method for winding a motor stator according to the foregoing embodiments, and further includes step S5: welding the crimping structure to the winding teeth.

[0013] The present invention provides an electric motor, including the motor stator described in the foregoing embodiments. Attached Figure Description To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 A schematic diagram showing the positional relationship between the first stator lamination and the second stator lamination provided in an embodiment of the present invention; Figure 2 for Figure 1 A partial enlarged view of A in the schematic diagram showing the positional relationship between the first stator lamination and the second stator lamination; Figure 3 This is a schematic diagram of the stator core of a motor stator provided in an embodiment of the present invention; Figure 4 A schematic diagram showing the positional relationship between the stator core and the positioning fixture in the motor stator winding method provided in an embodiment of the present invention; Figure 5 for Figure 4 A partial enlarged view of B in the schematic diagram of the positional relationship between the stator core and the positioning fixture in the winding method of the motor stator shown; Figure 6 A schematic diagram showing the positional relationship between the insulation frame and the positioning fixture in the motor stator winding method provided in this embodiment of the invention; Figure 7 A schematic diagram showing the positional relationship between the insulation frame and the pressing fixture in the motor stator winding method provided in an embodiment of the present invention; Figure 8 This is a schematic diagram showing the positional relationship between the crimping structure and the insulating frame in the winding method for the motor stator provided in an embodiment of the present invention.

[0015] Icons: 101-First straight yoke; 102-First straight tooth; 1021-First lower welding side; 103-First toothed shoe; 1031-First upper welding side; 104-First winding slot; 201-Second straight yoke; 202-Second straight tooth; 2021-Second lower welding side; 203-Second toothed shoe; 2031-Second upper welding side; 204-Second winding slot; 300-Stator core; 400-Winding tooth; 500-Crimping structure; 600-Insulation frame; 700-Positioning fixture; 800-Crimping fixture; 900-Coil winding. Detailed Implementation

[0016] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0017] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0020] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0021] Example Reference Figures 1-8 The present invention provides a stator lamination, including a first stator lamination and a second stator lamination, wherein both the first stator lamination and the second stator lamination extend along a first direction; The first stator lamination includes a first straight yoke portion 101 and a plurality of first straight teeth portions 102 spaced apart along a first direction of the first straight yoke portion 101; The second stator lamination includes a second straight yoke 201 and a plurality of second straight teeth 202 spaced apart along a first direction of the second straight yoke 201; Furthermore, the first straight yoke 101 and the second straight yoke 201 are arranged in parallel, and the first straight tooth 102 and the second straight tooth 202 are arranged in parallel and alternately. Two first toothed shoe portions 103 are provided at one end of the first straight toothed portion 102 away from the first straight yoke portion 101, and the two first toothed shoe portions 103 are provided at both ends of the first straight toothed portion 102 in the first direction. Two second toothed shoe portions 203 are provided at one end of the second straight toothed portion 202 away from the second straight yoke portion 201, and the two second toothed shoe portions 203 are provided at both ends of the second straight toothed portion 202 in the first direction. The first stator lamination and the second stator lamination can be separated from each other, and one or more first stator laminations and / or one or more second stator laminations can be spliced ​​together to form a stator lamination; multiple stator laminations can be stacked to form a stator core; The first direction is the length direction of the stator lamination.

[0022] In some embodiments, the raw material for the stator lamination is silicon steel sheet, with a thickness generally of 0.2mm-0.5mm. The core material coil is assembled on an uncoiler, and the core material passes through a leveling machine and enters an automatic feeding device for automatic feeding. The strip-shaped core material enters the mold and is then continuously punched, punched, formed, finished, trimmed, automatically stacked core laminations, stacked laminations with twisting and unloading, and stacked laminations with rotating, etc., until the finished core parts are conveyed out of the mold.

[0023] Stator laminations are directly punched from strip-shaped iron core material. After separation, stator laminations can form first stator laminations and second stator laminations. Generally, the sizes of the first stator laminations and second stator laminations are completely formed, but the sizes of the first stator laminations and second stator laminations can be different.

[0024] When the first stator lamination and the second stator lamination are exactly the same size, the first stator lamination or the second stator lamination are spliced ​​end to end to form a stator lamination; or one or more first stator laminations and one or more second stator laminations are spliced ​​end to end to form a stator lamination; the stator lamination may include only one first stator lamination, or it may include multiple first stator laminations, or it may include only one second stator lamination, or it may include multiple second stator laminations.

[0025] Reference Figure 2 In an optional embodiment, a first winding groove 104 is formed between adjacent first straight tooth portions 102, and a second winding groove 204 is formed between adjacent second straight tooth portions 202. A portion of the first straight tooth 102 is disposed in the second winding groove 204, and a portion of the second straight tooth 202 is disposed in the first winding groove 104.

[0026] The first straight tooth 102 of the first stator lamination is located in the second winding groove 204 of the second stator lamination, and the second straight tooth 202 of the second stator lamination is located in the first winding groove 104 of the first stator lamination; this can make full use of the core material and reduce the production cost of the stator core.

[0027] In an optional embodiment, the first stator lamination and the second stator lamination are the same size and shape.

[0028] To reduce the difficulty of assembling the stator core, the first and second stator laminations are made to be the same size and shape. This avoids confusion between the first and second stator laminations during the classification process, which would affect the efficiency of the subsequent stator core assembly.

[0029] After the first and second stator laminations of the same size and shape are separated, they can be used together to improve the assembly efficiency of the stator core.

[0030] In an optional embodiment, a first upper welding side 1031 is provided on the side of the first toothed shoe portion 103 away from the adjacent first toothed shoe portion 103; and a first lower welding side 1021 matching the first upper welding side 1031 is provided on the first straight tooth portion 102.

[0031] In an optional embodiment, a second upper welding side 2031 is provided on the side of the second toothed shoe portion 203 away from the adjacent second toothed shoe portion 203; a second lower welding side 2021 matching the second upper welding side 2031 is provided on the second straight tooth portion 202.

[0032] In some embodiments, the first upper welding side 1031 of the first toothed shoe portion 103 and the first lower welding side 1021 of the first straight tooth portion 102 can be welded together, thereby making the first toothed shoe portion 103 and the first straight tooth portion 102 firmly connected, so that the first toothed shoe portion 103 can firmly abut against the insulating frame 600.

[0033] In an optional embodiment, both the first straight yoke 101 and the second straight yoke 201 are provided with a stacked protrusion structure.

[0034] To facilitate the stacking of the first stator laminations, the stacking of the first stator laminations and the stacking of the second stator laminations, and the stacking of the first stator laminations and the second stator laminations, a lamination protrusion structure is provided on the first straight yoke portion 101 of the first stator lamination and the second straight straight yoke portion 201 of the second stator lamination. By providing the lamination protrusion structure, the stator laminations are pre-positioned during the stacking process, which is beneficial to the compactness and reliability of the stacked stator laminations.

[0035] The stator laminations provided by this invention are formed by splicing together two rows of opposing first stator laminations and second stator laminations, which helps to improve the utilization rate of core materials and reduce production costs.

[0036] The present invention provides a motor stator, including a stator core 300, wherein the stator core 300 includes a plurality of stator laminations; the stator laminations are formed by splicing together one or more first stator laminations of any one of the foregoing embodiments and / or one or more second stator laminations of any one of the foregoing embodiments. Multiple first straight tooth portions 102 and / or multiple second straight tooth portions 202 are stacked to form a winding tooth 400, and multiple first tooth shoe portions 103 and / or multiple second tooth shoe portions 203 are stacked to form a crimping structure 500.

[0037] Reference Figures 4-8 The present invention provides a method for winding a motor stator as described in the foregoing embodiments, comprising the following steps: S1: Place the stator core on the winding fixture, the positioning fixture 700 rises and inserts into the winding teeth 400 of the stator core, and the positioning fixture 700 is located on the side of the winding teeth 400 away from the pressing structure 500. S2: The insulating frame 600 is fitted onto the winding tooth 400 and abuts against the positioning fixture 700, and the pressing structure 500 is located inside the insulating frame 600; S3: A coil winding 900 is formed by winding outside the insulating frame 600. The positioning fixture 700 is lowered, and the insulating frame 600 is pressed into the winding teeth 400 by the pressing fixture 800, so that the pressing structure 500 extends out from inside the insulating frame 600. S4: Bend the crimped structure 500 and abut it against the insulating frame 600.

[0038] The present invention provides a method for winding a motor stator according to the foregoing embodiments, and further includes step S5: welding the crimping structure 500 to the winding teeth 400.

[0039] In some embodiments, the stator core is placed on a winding fixture, and an insulating frame 600 is fitted onto the winding teeth 400; a fan-shaped area is formed between two adjacent winding teeth 400. When the insulating frame 600 is fitted onto the winding teeth 400, the further away the insulating frame 600 is from the center of the stator core, the larger the gap between two adjacent insulating frames 600.

[0040] The positioning fixture 700 fixes the insulating frame 600 and leaves a certain distance between it and the bottom of the winding tooth 400. At this time, the winding machine winds the wire on the insulating frame 600 to form a coil winding 900. In this way, the winding area is closer to the outer diameter, which can make the winding slot fill factor higher.

[0041] After the winding is completed, the positioning fixture 700 descends and is pulled out of the stator core. At this time, the pressing fixture 800 presses the insulation frame 600 into the winding teeth 400 and causes the pressing structure 500 to extend out from the insulation frame 600.

[0042] The press-fit structure 500 is bent so that the first upper welding side 1031 of the first toothed shoe portion 103 abuts against the first lower welding side 1021 of the first straight toothed portion 102; each of the two sides of the first straight toothed portion 102 has a first lower welding side 1021, and the first upper welding side 1031 of the two first toothed shoe portions 103 abuts against a first lower welding side 1021; similarly, the second upper welding side 2031 of the second stator lamination in the electronic core abuts against the second lower welding side 2021; This allows the crimping structure 500 to be bent and abut against the insulating frame 600, preventing the insulating frame 600 from detaching from the winding teeth 400. To ensure a firm connection between the crimping structure 500 and the winding teeth 400, and to maintain contact between the crimping structure 500 and the insulating frame 600, the crimping structure 500 is welded to the winding teeth 400, forming a shoulder on the crimping structure 500.

[0043] The slot shoulders of this stator core are formed by pressing and bending the structure by 500 degrees. This method can be used for different types of stator core slots, such as straight tooth slots, pear-shaped slots, and parallel slots. Auxiliary slots can also be opened on the surface of the stator core, and weight-reducing holes can be opened inside.

[0044] By adopting this motor stator winding method, the motor winding slot fill factor can be improved, motor efficiency can be increased, and motor heat generation can be reduced.

[0045] The present invention provides an electric motor, including the motor stator described in the foregoing embodiments. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stator lamination, characterized in that, It includes a first stator lamination and a second stator lamination, and both the first stator lamination and the second stator lamination extend along a first direction; The first stator lamination includes a first straight yoke (101) and a plurality of first straight teeth (102) spaced apart along a first direction of the first straight yoke (101). The second stator lamination includes a second straight yoke (201) and a plurality of second straight teeth (202) spaced apart along a first direction of the second straight yoke (201). Furthermore, the first straight yoke (101) and the second straight yoke (201) are arranged in parallel, and the first straight tooth (102) and the second straight tooth (202) are arranged in parallel and alternately; Two first toothed shoe portions (103) are provided at one end of the first straight toothed portion (102) away from the first straight yoke portion (101), and the two first toothed shoe portions (103) are provided at both ends of the first straight toothed portion (102) in a first direction; Two second toothed shoe portions (203) are provided at one end of the second straight toothed portion (202) away from the second straight yoke portion (201), and the two second toothed shoe portions (203) are provided at both ends of the second straight toothed portion (202) in the first direction; The first stator lamination and the second stator lamination can be separated from each other, and one or more first stator laminations and / or one or more second stator laminations can be spliced ​​together to form a stator lamination; multiple stator laminations can be stacked to form a stator core; The first direction is the length direction of the stator lamination.

2. The stator lamination according to claim 1, characterized in that, A first winding groove (104) is formed between adjacent first straight teeth (102), and a second winding groove (204) is formed between adjacent second straight teeth (202). A portion of the first straight tooth (102) is disposed in the second winding groove (204), and a portion of the second straight tooth (202) is disposed in the first winding groove (104).

3. The stator lamination according to claim 1, characterized in that, The first stator lamination and the second stator lamination are the same size and shape.

4. The stator lamination according to claim 1, characterized in that, A first upper welding side (1031) is provided on the side of the first toothed shoe portion (103) away from the adjacent first toothed shoe portion (103); a first lower welding side (1021) matching the first upper welding side (1031) is provided on the first straight tooth portion (102).

5. The stator lamination according to claim 1, characterized in that, A second upper welding side (2031) is provided on the side of the second toothed shoe portion (203) away from the adjacent second toothed shoe portion (203); a second lower welding side (2021) matching the second upper welding side (2031) is provided on the second straight toothed portion (202).

6. The stator lamination according to claim 1, characterized in that, Both the first straight yoke (101) and the second straight yoke (201) are provided with a stacked protrusion structure.

7. A motor stator, characterized in that, Includes a stator core, wherein the stator core (300) comprises a plurality of stator laminations; the stator laminations are formed by splicing together one or more first stator laminations according to any one of claims 1-6 and / or one or more second stator laminations according to any one of claims 1-6; Multiple first straight teeth (102) and / or multiple second straight teeth (202) are stacked to form a winding tooth (400), and multiple first toothed shoe portions (103) and / or multiple second toothed shoe portions (203) are stacked to form a crimping structure (500).

8. A method for winding a motor stator as described in claim 7, characterized in that, Includes the following steps: S1: Place the stator core on the winding fixture, the positioning fixture (700) rises and inserts into the winding teeth (400) of the stator core, and the positioning fixture (700) is located on the side of the winding teeth (400) away from the pressing structure (500). S2: The insulating frame (600) is fitted onto the winding teeth (400) and abuts against the positioning fixture (700), and the pressing structure (500) is located inside the insulating frame (600); S3: A coil winding (900) is formed by winding outside the insulating frame (600). The positioning fixture (700) is lowered, and the insulating frame (600) is pressed into the winding teeth (400) by the pressing fixture (800), so that the pressing structure (500) extends out from inside the insulating frame (600). S4: Bend the crimped structure (500) and abut it against the insulating frame (600).

9. The method for winding a motor stator according to claim 8, characterized in that, It also includes step S5: welding the crimping structure (500) to the winding teeth (400).

10. An electric motor, characterized in that, Includes the motor stator as described in claim 7.

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