Wiring device, stator, motor and stator production method

Abstract

The invention provides a wiring device, a stator, a motor and a production method of the stator, the wiring device comprises a wiring terminal and a terminal seat, the terminal seat is provided with a slot, the wiring terminal is inserted into the terminal seat, the wiring terminal comprises a puncturing part and a connecting part, the puncturing part comprises at least two layers of metal sheets, and the metal sheets are arranged in the slot. First clamping parts are arranged on the two sides of the first-layer metal sheet, second clamping parts are arranged on the two sides of the second-layer metal sheet, the second-layer metal sheet is provided with a deformation groove, and the deformation groove is located between the two second clamping parts; and a limiting groove opposite to the second clamping part is formed in the slot, so that the technical problems of low connection efficiency and infirm fixation between the wiring terminal and the terminal seat in the prior art can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a wiring device, a stator, a motor and a production method of the stator. Background Art

[0002] The stator windings of existing motors are typically connected to an external power supply line via a terminal block. The stator windings are then clipped into the terminal block, electrically connected to the terminal block, and the external power supply line is then electrically connected to the terminal block, thus achieving electrical connection between the stator windings and the external power supply. Furthermore, a terminal block is provided on the stator's insulating frame, and the terminal block is fixed to the terminal block to secure the terminal block. Existing terminal blocks are inserted into the terminal block using an interference fit, which makes the insertion process difficult and inefficient. Improving the efficiency of the fixation between the terminal block and the terminal block is a pressing technical solution. Summary of the Invention

[0003] The present invention provides a wiring device, a stator, a motor and a production method of the stator, which can solve the technical problems of low connection efficiency and loose fixation between wiring terminals and terminal blocks in the prior art.

[0004] A first aspect of the present invention provides a wiring device, comprising a wiring terminal and a terminal seat, wherein the terminal seat is provided with a slot, and the wiring terminal is inserted into the terminal seat, the wiring terminal comprises a piercing portion and a connecting portion, the piercing portion comprises at least two layers of metal sheets, a first clamping portion is provided on both sides of the first layer of metal sheet, a second clamping portion is provided on both sides of the second layer of metal sheet, the second layer of metal sheet is provided with a deformation groove, and the deformation groove is located between the two second clamping portions; a limiting groove opposite to the second clamping portion is provided in the slot.

[0005] In some embodiments, the puncture portion is provided with a puncture section extending along the first direction, and the puncture section is used to puncture and fix the wire; the terminal seat is provided with a limiting section extending along the first direction and corresponding to the puncture section, and the minimum width of the limiting section is greater than the outer diameter of the wire.

[0006] In some embodiments, the puncture portion further includes a guide segment, the first end of the guide segment is an insertion opening for the wire, the second end of the guide segment is connected to the puncture segment, the first end of the guide segment is facing in a second direction, and the second direction is not parallel to the first direction.

[0007] In some embodiments, the wiring device includes an insulating cover, which is sleeved on the terminal seat; the insulating cover is provided with a clearance groove extending along the first direction, and the clearance groove is opposite to the puncture section.

[0008] In some embodiments, a socket is provided on the insulating cover, and the connecting portion is inserted into the socket and passes through the insulating cover.

[0009] In some embodiments, the terminal is formed by bending a single metal sheet, the connecting portion and the first layer of metal sheet are the same metal plate surface, and the connecting portion is connected to the first end of the first layer of metal sheet; the first end of the second layer of metal sheet is connected to the second end of the first layer of metal sheet via a first connecting section, and the second end of the second layer of metal sheet is not connected to the first layer of metal sheet or to the connecting portion; the puncture section and the guide section both pass through the first layer of metal sheet and the second layer of metal sheet.

[0010] In some embodiments, the wiring device also includes a third layer of metal sheet, which is located between the first layer of metal sheet and the second layer of metal sheet, and is connected to the second end of the second layer of metal sheet via the third connecting section; the puncturing section and the guide section also pass through the third layer of metal sheet.

[0011] In some embodiments, the maximum distance between the two first clamping portions is L1, the maximum distance between the sides of the slot opposite to the two sides of the first metal sheet is L2, and 0.9L1<L2<L1.

[0012] In some embodiments, a first positioning portion is provided at the bottom of the slot, and a second positioning portion is provided at the connection terminal, and the second positioning portion matches the first positioning portion.

[0013] In a second aspect, the present invention further provides a stator, comprising an upper insulating frame and the wiring device; the terminal seat is arranged on the upper insulating frame.

[0014] In a third aspect, the present invention further provides a motor comprising the stator.

[0015] In a fourth aspect, the present invention provides a method for producing the stator, comprising first inserting a terminal into a slot of the terminal block, and then inserting a wire into the piercing section of the terminal.

[0016] The present invention provides a first clamping portion and a second clamping portion on the piercing portion of the terminal block, wherein the first clamping portion is provided on the first layer of metal sheet, and the second clamping portion is provided on the second layer of metal sheet, wherein a deformation groove is provided between the second clamping portions. When the piercing portion is inserted into the terminal block, the second clamping portion is used to determine whether the terminal block is properly installed, and the first clamping portion is used to ensure that the terminal block is firmly fixed in the terminal block, thereby improving the degree of fixation of the terminal block in the terminal block. Since only the first clamping portion and the second clamping portion are pressed against the inner wall surface of the slot between the terminal block and the slot, the difficulty of inserting the terminal block into the terminal block is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. Those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0018] Figure 1 is an oblique view of a terminal block according to an embodiment of the present invention; Figure 2 is a side view of a terminal block according to an embodiment of the present invention; Figure 3 is a schematic diagram of an insulating cover according to an embodiment of the present invention; Figure 4 is a schematic diagram of an upper insulating skeleton according to an embodiment of the present invention; Figure 5 This is an embodiment of the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 Schematic diagram of an upper insulating frame, a lower insulating frame and an iron core assembled together according to an embodiment of the present invention; Figure 7 This is an embodiment of the present invention Figure 6 Radial schematic diagram of ; Figure 8 This is an embodiment of the present invention Figure 7 Enlarged view of point B in the middle; Figure 9 is a schematic diagram of a lower insulating frame according to an embodiment of the present invention; Figure 10 Schematic diagram of an iron core, an upper insulating frame, a lower insulating frame, a wiring terminal and an insulating cover assembled together according to an embodiment of the present invention; Figure 11 This is a schematic diagram of an iron core, an upper insulating frame, a lower insulating frame, a wiring terminal, and an insulating cover assembled together after injection molding according to an embodiment of the present invention; Figure 12 is a schematic diagram of an end cover according to an embodiment of the present invention; Figure 13 This is an embodiment of the present invention Figure 11 Radial cross-sectional view; Figure 14 This is an embodiment of the present invention Figure 13 Enlarged view of point C in the middle.

[0019] The accompanying drawings are: 1. Wiring terminal; 101. Puncture portion; 102. Connecting portion; 1011. First layer of metal sheet; 1012. Second layer of metal sheet; 1013. Third layer of metal sheet; 1021. First clamping portion; 1022. Second clamping portion; 103. Puncture section; 104. Guide section; 1014. Deformation groove; 2. Terminal block; 201. Slot; 2011. Limiting groove; 202. Limiting section; 203. Window; 3. Insulating cover; 301. Giving groove; 302. Jack; 401. First positioning portion; 402. Second positioning portion; 5. End cover; 601. Upper insulating frame; 602. Lower insulating frame. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0022] For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "upper" may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in a drawing is inverted, a device described as "above" or "on top of" another device or structure would then be positioned as "below" or "below" the other device or structure. Thus, the exemplary term "above" can include both the "above" and "below" orientations. The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0023] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0024] See also Figure 1-14 As shown, the present invention provides a wiring device, including a wiring terminal 1 and a terminal base 2, the terminal base 2 is provided with a slot 201, the wiring terminal 1 is inserted into the terminal base 2, the wiring terminal 1 includes a puncture portion 101 and a connecting portion 102, the puncture portion 101 includes at least two layers of metal sheets, the first layer of metal sheet 1011 is provided with a first clamping portion 1021 on both sides, the second layer of metal sheet 1012 is provided with a second clamping portion 1022 on both sides, the second layer of metal sheet 1012 is provided with a deformation groove 1014, and the deformation groove 1014 is located between the two second clamping portions 1022; a limiting groove 2011 opposite to the second clamping portion 1022 is provided in the slot 201.

[0025] By providing the deformation groove 1014 and the limiting groove 2011, when the terminal block 1 is inserted into the terminal block 2, the second clamping portion 1022 squeezes the deformation groove 1014 to prevent the second clamping portion 1022 from being squeezed against the inner wall of the slot 201 by excessive pressure, thereby preventing smooth insertion. The second clamping portion 1022 cooperates with the limiting groove 2011 to position the terminal block 1 in a predetermined position within the terminal block 2 and to provide a certain degree of fixation. The first clamping portion 1021 squeezes against the inner wall of the slot 201 within the slot 201, thereby more firmly connecting the terminal block 1 and the terminal block 2 together without shaking. When the second clamping portion 1022 enters the limiting groove 2011, the terminal block 1 is inserted into place. Since only the first clamping portion 1021 and the second clamping portion 1022 squeeze against the inner wall of the slot 201 between the terminal block 1 and the slot 201, this reduces the difficulty of inserting the terminal block 1 into the terminal block 2 and improves the connection efficiency between the terminal block 1 and the terminal block 2.

[0026] Preferably, the maximum distance between the two first clamping portions 1021 is L1, the maximum distance between the sides of the slot 201 opposite to the two sides of the first metal sheet 1011 is L2, and 0.9L1<L2<L1.

[0027] By 0.9L1<L2<L1, the first clamping portion 1021 can be more easily inserted into the slot 201, while ensuring that the first clamping portion 1021 is firmly fixed to the terminal base 2, and avoiding excessive deformation and damage of the first clamping portion 1021.

[0028] Furthermore, the first clamping portion 1021 is a right triangle, and the inclined surface of the first clamping portion 1021 faces the bottom of the slot 201 , so that the first clamping portion 1021 can easily enter the slot 201 .

[0029] Preferably, Figure 8 As shown, the puncture portion 101 is provided with a puncture section 103 extending along the first direction, and the puncture section 103 is used to puncture and fix the wire; the terminal seat 2 is provided with a limiting section 202 extending along the first direction and corresponding to the puncture section 103, and the minimum width of the limiting section 202 is greater than the outer diameter of the wire.

[0030] The terminal block 1 in this application is first inserted into the slot 201 of the terminal block 2, and then the wire is placed into the piercing section 103, and a limit section 202 is set on the terminal; Figure 8As shown, on the one hand, since the limiting section 202 is opposite to the puncture section 103, the limiting section 202 forms a limiting effect on the wire, so that when the wire is placed in the puncture section 103, it can be uniformly stressed on both sides of the puncture section 103, thereby preventing the wire and one side of the puncture section 103 from being subjected to excessive force, causing the inner core (conductive part) of the wire to be damaged by excessive pressure from the puncture section 103, thereby reducing the structural strength of the wire; on the other hand, after the puncture section 103 is fixed, the wire is blocked by the limiting section 202 when shaking, and a small angle is not formed between the wire and the puncture part 101. The angle between the wire adjacent to the puncture part 101 and located outside the puncture part 101 and the wire inside the puncture part 101 is larger, that is, the wire outside the puncture part 101 is relatively less bent than the wire inside the puncture part 101, which avoids the puncture section 103 from generating a large shear force on the wire, thereby improving the strength of the wire in the puncture section 103.

[0031] Preferably, Figure 1-2 As shown, the puncture portion 101 further includes a guide segment 104, the first end of the guide segment 104 is an opening for the wire to be inserted, the second end of the guide segment 104 is connected to the puncture segment 103, and the first end of the guide segment 104 is oriented in a second direction, which is not parallel to the first direction.

[0032] By setting the guide section 104, one end of the guide section 104 is connected to the puncture section 103, and the other section is a snap-in opening, and the direction of the opening of the wire end is not parallel to the first direction; on the one hand, it is more convenient and quick for the wire to enter the puncture section 103 through the guide section 104; on the other hand, when the wire falls off from the puncture section 103, it needs to pass through the guide section 104. The opening direction of the guide section 104 is different from the extension direction of the puncture section 103, which has a certain blocking effect on the sliding of the wire and is conducive to the stable connection of the wire.

[0033] Preferably, Figure 3 、 Figure 14 As shown, the wiring device includes an insulating cover 3, which is sleeved on the terminal base 2; the insulating cover 3 is provided with a clearance groove 301 extending along the first direction, and the clearance groove 301 is opposite to the piercing section 103.

[0034] By providing the insulating cover 3, on the one hand, the insulating cover 3 covers the terminal seat 2 to protect the punctured wire; on the other hand, the yield groove 301 on the insulating cover 3 extends along the first direction. Since the opening direction of the guide section 104 is different from the first direction, even if the wire shakes in the puncture section 103, the force acting on the wire does not extend along the first direction under the joint restriction of the guide section 104 and the limit section 202. In this way, the force acting on the insulating cover 3 by the wire is not along the first direction, so that the shaking of the wire has less effect on the insulating cover 3, avoiding the insulation cover 3 from falling off under the action of the wire, and ultimately facilitating the stable connection of the wire on the terminal 1.

[0035] The insulating cover 3 can provide good insulation protection for the connecting terminal 1 and improve the reliability and stability of the connecting terminal 1 in use.

[0036] Furthermore, a window 203 is provided on the terminal. When inserting the connecting terminal 1 , it is also possible to check through the window 203 whether the connecting terminal 1 is inserted into place.

[0037] Preferably, Figure 3 、 Figure 7 and Figure 8 As shown, the insulating cover 3 is provided with an insertion hole 302 , and the connecting portion 102 is inserted into the insertion hole 302 and passes through the insulating cover 3 .

[0038] By providing the insertion hole 302 , the connection portion 102 passes through the insulating cover 3 , which facilitates the connection between the connection portion 102 and an external cable.

[0039] Preferably, Figure 1 、 Figure 2 and Figure 14 As shown, the terminal 1 is formed by bending a single metal sheet, the connecting portion 102 and the first layer of metal sheet 1011 are the same metal plate surface, and the connecting portion 102 is connected to the first end of the first layer of metal sheet 1011; the first end of the second layer of metal sheet 1012 is connected to the second end of the first layer of metal sheet 1011 via the first connecting section, and the second end of the second layer of metal sheet 1012 is not connected to the first layer of metal sheet 1011, nor is it connected to the connecting portion 102; the piercing section 103 and the guide section 104 both pass through the first layer of metal sheet 1011 and the second layer of metal sheet 1012.

[0040] The terminal block 1 is formed by bending a single metal sheet, which is very clever. Figure 1 、 Figure 2As shown, since the second-layer metal sheet 1012 is not connected to the first-layer metal sheet 1011 or the connecting portion 102, the second-layer metal sheet 1012 is in a suspended state, and one end of the second-layer metal sheet 1012 is suspended, so that when the terminal 1 is inserted into the slot 201, the second-layer metal sheet 1012 as a whole will be deformed; and since the second-layer metal sheet 1012 is provided with a second clamping portion 1022, and a deformation groove 1014 is provided between the second clamping portion 1022, when the second clamping portion 1022 is squeezed by the inner wall of the slot 201, it can not only be deformed due to the deformation groove 1014, but also due to the overall deformation of the second-layer metal sheet 1012. In this way, the second clamping portion 1022 can more easily enter the slot 201, which is beneficial to improving the efficiency of inserting the terminal 1 into the slot 201.

[0041] The piercing section 103 and the guide section 104 both pass through the first layer of metal sheet 1011 and the second layer of metal sheet 1012. When the wire is inserted, the wire is pierced and clamped by the first layer of metal sheet 1011 and the second layer of metal sheet 1012 at the same time. This allows one guide to be electrically connected to the terminal 1 at four points at the same time. In this way, the wire will not be broken due to the lack of electrical connection at a single point or several points (no more than 3) and thus the stability of the electrical connection between the wire and the terminal 1 is improved.

[0042] Preferably, Figure 3 、 Figure 7 and Figure 8 As shown, the wiring device also includes a third layer of metal sheet 1013, which is located between the first layer of metal sheet 1011 and the second layer of metal sheet 1012, and the third layer of metal sheet 1013 is connected to the second end of the second layer of metal sheet 1012 via the second connecting section; the piercing section 103 and the guide section 104 also pass through the third layer of metal sheet 1013.

[0043] By providing a third layer of metal sheet 1013, the piercing section 103 and the guide section 104 also pass through the third layer of metal sheet 1013, thereby increasing the number of electrical connections between the wire and the terminal 1. A wire has two contacts with a metal sheet (electrical contact after piercing the insulating layer). With three layers of metal sheets, a wire can have six electrical connections with the terminal 1, further improving the stability of the electrical connection between the wire and the terminal 1.

[0044] Furthermore, the number of bending times of the metal sheet can be further increased to increase the number of electrical connections between the wire and the terminal block 1 .

[0045] Multiple wires can be placed in the same puncture section 103 at the same time, thereby realizing parallel connection of multiple wires.

[0046] Preferably, Figure 8 As shown, a first positioning portion 401 is provided at the bottom of the slot 201 , and a second positioning portion 402 is provided on the connection terminal 1 , and the second positioning portion 402 matches the first positioning portion 401 .

[0047] By providing the first positioning portion 401 and the second positioning portion 402 , the stability and accuracy of fixing the connection terminal 1 in the slot 201 are improved.

[0048] The present invention further provides a stator, comprising an upper insulating frame 601 and a wiring device; the terminal seat 2 is arranged on the upper insulating frame 601 .

[0049] The stator provided with the wiring device has a simple and firm connection for the winding lead wires, thereby improving production efficiency and operation stability.

[0050] Because the stator winding uses enameled wire, the existing technology requires stripping the paint before welding to make electrical connections, which is a complicated process and may cause cold solder joints. By adopting the above-mentioned wiring device, the stripping and welding are unnecessary, the process is simplified, and costs are reduced.

[0051] The stator comprises a terminal block 1, an insulating sheath, an upper insulating frame 601, and a lower insulating frame 602. After the windings are connected and installed, the excess enameled wire is trimmed, and the end cap 5 is placed in the injection mold before the entire assembly is injection molded. After injection molding, the connection portion 102 of the terminal block 1 is located outside the molding compound for wiring. The stator employing the terminal block 1 has a smaller overall size and a more stable electrical connection to the outside. Both the upper insulating frame 601 and the lower insulating frame 602 are positioned and connected to the core via positioning posts.

[0052] The present invention provides a motor including the above-mentioned stator.

[0053] The use of this stator significantly improves the production efficiency of the motor, makes it more stable during transportation, and secures the stator winding more firmly and stably during use. This makes the motor safer and more stable, significantly extends its service life, reduces safety risks, and is less susceptible to adverse external environments.

[0054] Specifically, when the motor is a brushless DC motor and adopts a Y-type wiring method, the three-phase winding lead wires and the common end are electrically connected through the above-mentioned terminal 1. The wires of two or more windings can be inserted into the same piercing section 103 to achieve parallel connection. The common end can also be electrically connected through the terminal 1.

[0055] The present invention provides a method for producing the stator, which includes first inserting the terminal 1 into the slot 201 of the terminal block 2 , and then inserting the wire into the piercing section 103 of the terminal 1 .

[0056] In the prior art, the wire is first inserted into the piercing section 103, and then the terminal block 1 is fixed to the terminal block 2. During the process of fixing the terminal block 1, the wire is prone to shaking on the terminal block 1. When the guide is pulled by other objects, it may even fall out of the piercing section 103, which will increase the defective rate of the stator. In the present application, when wiring, the terminal block 1 is first inserted into the terminal block 2, and then the wire is inserted into the piercing section 103 of the terminal block 1. This ensures that after the wire is inserted into the terminal block 1, it will not fall out due to further movement of the terminal block 1.

[0057] The overall production process of the stator includes: first, the upper insulating frame 601 and the lower insulating frame 602 are plugged into and mounted on the iron core of the stator, and the mounting positions on the upper insulating frame 601 and the lower insulating frame 602 are aligned with the limiting groove 2011 of the stator iron core, and the winding is wound according to the conventional process to produce a wound stator; the terminal 1 is installed in the terminal seat 2 on the upper insulating frame 601, and the second clamping portion 1022 on the terminal 1 is checked through the window 203 of the terminal seat 2 set on the upper insulating frame 601 to see whether it is in place, and at the same time, the first clamping portion 1021 on the terminal 1 is deformed during the process of inserting the terminal 1 into the slot 201 of the terminal seat 2, thereby achieving the effect of fixing the terminal 1, and after determining that it is in place, the wound enameled wire is clamped into the piercing section 103 along the guide section 104. During the clamping process, the terminal 1 achieves the effect of stripping the paint skin of the enameled wire and piercing and fixing it; further, the piercing section 103 and the guide section 104 are set to a left-right symmetrical structure (such as Figure 8 As shown), the two sides can pierce and fix multiple enameled wires without interfering with each other. After completing the above steps, cut off the excess enameled wires, install the insulating cover 3 in the wiring structure, cover and insulate the terminal block 2 and the terminal block 1 while avoiding the enameled wires; after the insulating cover 3 is installed in place, it also plays a role in fixing the enameled wires to prevent them from loosening. Finally, the whole is subjected to the injection molding process. After the injection molding is completed, the insulating cover 3 is completely wrapped in the plastic packaging material, and only the connecting part 102 of the terminal block 1 is exposed to the injection molded stator. The terminal block 1 can meet the requirements of multiple enameled wires being turned on at the same time and the conduction effect is completely consistent. Even a single enameled wire can be used, and the wiring method is consistent. There is no need to replace the adapter tooling or materials, which saves labor time and meets the needs of various types of wiring. At the same time, the piercing part 101 of the entire terminal block 1 is covered in the plastic packaging material after the injection molding is completed. It has a long service life and can better resist the harsh external environment.

[0058] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A wiring device, comprising a wiring terminal (1) and a terminal base (2), wherein the terminal base (2) is provided with a slot (201), and the wiring terminal (1) is inserted into the terminal base (2), characterized in that: The connecting terminal (1) comprises a puncturing portion (101) and a connecting portion (102); the puncturing portion (101) comprises at least two layers of metal sheets; first clamping portions (1021) are provided on both sides of the first layer of metal sheets (1011); second clamping portions (1022) are provided on both sides of the second layer of metal sheets (1012); the second layer of metal sheets (1012) is provided with a deformation groove (1014); the deformation groove (1014) is located between the two second clamping portions (1022); and a limiting groove (2011) is provided in the slot (201) and is opposite to the second clamping portion (1022).

2. The wiring device according to claim 1, characterized in that The puncturing portion (101) is provided with a puncturing section (103) extending along a first direction, and the puncturing section (103) is used to puncture and fix the wire; the terminal seat (2) is provided with a limiting section (202) extending along the first direction and corresponding to the puncturing section (103), and the minimum width of the limiting section (202) is greater than the outer diameter of the wire.

3. The wiring device according to claim 2, characterized in that The puncturing portion (101) further comprises a guide section (104), wherein a first end of the guide section (104) is an insertion opening for the wire, a second end of the guide section (104) is in communication with the puncturing section (103), and the first end of the guide section (104) faces a second direction, which is non-parallel to the first direction.

4. The wiring device according to claim 3, characterized in that The wiring device comprises an insulating cover (3), which is sleeved on the terminal seat (2); the insulating cover (3) is provided with a clearance groove (301) extending along the first direction, and the clearance groove (301) is opposite to the puncturing section (103).

5. The wiring device according to claim 4, characterized in that: The insulating cover (3) is provided with a socket (302), and the connecting portion (102) is inserted into the socket (302) and passes through the insulating cover (3).

6. The wiring device according to claim 2, wherein: The connection terminal (1) is formed by bending a single metal sheet; the connecting portion (102) and the first layer of metal sheet (1011) are the same metal plate surface; the connecting portion (102) is connected to the first end of the first layer of metal sheet (1011); the first end of the second layer of metal sheet (1012) is connected to the second end of the first layer of metal sheet (1011) via a first connecting section; the second end of the second layer of metal sheet (1012) is not connected to the first layer of metal sheet (1011) nor to the connecting portion (102); the piercing section (103) and the guiding section (104) both pass through the first layer of metal sheet (1011) and the second layer of metal sheet (1012).

7. The wiring device according to claim 6, characterized in that The wiring device further comprises a third layer of metal sheet (1013), the third layer of metal sheet (1013) being located between the first layer of metal sheet (1011) and the second layer of metal sheet (1012), the third layer of metal sheet (1013) being connected to the second end of the second layer of metal sheet (1012) via the second connecting section; the piercing section (103) and the guiding section (104) also pass through the third layer of metal sheet (1013).

8. The wiring device according to claim 1, wherein: The maximum distance between the two first clamping portions (1021) is L1, and the maximum distance between the sides of the slot (201) opposite to the two sides of the first layer of metal sheet (1011) is L2, 0.9L1<L2<L1.

9. The wiring device according to any one of claims 1 to 8, characterized in that: The bottom of the slot (201) is provided with a first positioning portion (401), and the connection terminal (1) is provided with a second positioning portion (402), and the second positioning portion (402) matches the first positioning portion (401).

10. A stator, characterized in that: It comprises an upper insulating frame (601) and the wiring device according to any one of claims 1 to 9; the terminal seat (2) is arranged on the upper insulating frame (601).

11. A motor, characterized in that: Comprising the stator according to claim 10.

12. A method for producing the stator according to claim 10, characterized in that: First, the wiring terminal (1) is inserted into the slot (201) of the terminal seat (2), and then the wire is clamped into the piercing section (103) of the wiring terminal (1).

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