Magnetic adsorption tool for stator winding

Abstract

The utility model discloses a magnetic adsorption tool for stator winding, which comprises two magnetizers, a non-magnetic base, a permanent magnet, a non-magnetic cover plate and a knob, and is characterized in that the two magnetizers are respectively provided with arc-shaped contact surfaces with the same radius; two baffles are arranged in the non-magnetic-conductive base and connected with the ends of the two magnetizers respectively, and a complete cylindrical cavity is defined by the arc-shaped contact face and the baffles. One radial side of the mounting groove is opened to form a stator mounting surface; the permanent magnet is provided with a magnetic conducting surface matched with the arc-shaped contact surface; the magnetizer and the permanent magnet are limited in the mounting groove by the non-magnetic cover plate; the knob is fixed to the end of the permanent magnet. The thicknesses of the two baffles are both smaller than the thickness of the permanent magnet, so that the magnetic conduction face is always in contact with the arc-shaped contact face in the rotating process of the permanent magnet. According to the utility model, the stator iron core is adsorbed and fixed by the magnetic field, the structure is simple, the winding tension of the enameled wire is met, and the tiny iron core can be conveniently placed.

Description

Technical Field

[0001] This utility model relates to the field of stator winding technology, and in particular to a magnetic adsorption tool for stator winding, mainly used for split-connection winding stator structures. Background Technology

[0002] Currently, many motor structures, such as servo motors and frameless motors, adopt a split stator splicing structure. The stator is usually manufactured by winding individual split stators separately, and then splicing the stators together and grouping the windings for connection.

[0003] For some micro motors, the stator core is small and difficult to clamp, and the enameled wire winding usually requires a certain tension. There are certain strength requirements for assembling the tooling with the separate stator core. Most existing stator fixing devices are mechanical clamping methods, which have problems such as complex structure, limited clamping positions, and inconvenient assembly and disassembly. For example, the stator fixing device disclosed in application number CN201020254279.3 requires first installing the two limiting plates of the clamping head to the stator before activating the cylinder, making assembly and disassembly inconvenient. Furthermore, the entire device needs to surround the lower half of the stator, which may affect the winding operation. For example, the stator fixing mechanism disclosed in application number CN202420361061.X uses the expansion or contraction of the air cushion to control the clamping plates to clamp or loosen the stator. In this case, the angle of the stator placement and the compatibility between the clamping plates and the stator are required to be high, otherwise the stator cannot be stably clamped. Moreover, this mechanism is not suitable for stator winding in micro motors. Since the clamping plates are surrounded by the stator, when the stator size is small, the working space of the winding machine will be very small, making it difficult to achieve stator winding.

[0004] Therefore, it is necessary to design a stator fixing fixture that is suitable for stator winding of micro motors, has a simple structure, and is easy to assemble and disassemble. Utility Model Content

[0005] To address the technical problems of existing stator fixing devices being complex in structure, inconvenient to assemble and disassemble, and unsuitable for the stable fixing of small stator cores, this utility model provides a magnetic adsorption fixture for stator winding to solve the above problems.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a magnetic adsorption fixture for stator winding, comprising two magnetic conductors, a non-magnetic base, a permanent magnet, a non-magnetic cover plate, and a knob. The two magnetic conductors each have an arc-shaped contact surface with equal radius. The non-magnetic base has a mounting groove for accommodating the two magnetic conductors. Two baffles are symmetrically arranged in the mounting groove, and the two baffles are respectively connected to the ends of the two magnetic conductors. The arc-shaped contact surface and the baffles form a complete cylindrical cavity. The radial side of the mounting groove opens to form a stator mounting surface. The permanent magnet is located in the cylindrical cavity and has a magnetically conductive surface that mates with the arc-shaped contact surface. The non-magnetic cover plate covers the end face of the non-magnetic base along the axial direction of the magnetic conductors, and the non-magnetic cover plate confines the magnetic conductors and the permanent magnet within the mounting groove. The knob is fixed to the end of the permanent magnet.

[0007] The thickness of both baffles is less than the thickness of the permanent magnet, so that the magnetic conductive surface of the permanent magnet is always in contact with the arc-shaped contact surface during the rotation of the permanent magnet.

[0008] Furthermore, the magnetic conductor is fixed to the non-magnetic base.

[0009] Furthermore, the non-magnetic base includes a base plate and a U-shaped plate fixed to the base plate to form a mounting groove. The U-shaped opening of the U-shaped plate forms a stator mounting surface. Both baffles are connected to the base plate, and two magnetic conductors are respectively filled between the two baffles and the U-shaped plate.

[0010] Furthermore, the knob includes a positioning disc and a handle. The center of the non-magnetic cover plate has a positioning hole that mates with the positioning disc. The distance between the two magnetic surfaces is greater than the diameter of the positioning hole. The handle extends radially out of the positioning disc. One end of the non-magnetic cover plate is attached to the non-magnetic base, and the handle is locked at the other end of the non-magnetic cover plate.

[0011] Furthermore, the surfaces of the non-magnetic base, the magnetic conductor, and the non-magnetic cover plate facing the stator mounting end are all flat, while the remaining outer surfaces are all arc-shaped.

[0012] Furthermore, the non-magnetic cover plate has a serrated edge on the side facing the stator mounting surface that mates with the end face of the iron core.

[0013] Furthermore, the base plate protrudes from the U-shaped opening of the U-shaped plate and forms a positioning surface that abuts against the stator.

[0014] Furthermore, one end of the non-magnetic cover plate that engages with the handle has a first stepped surface parallel to the stator mounting surface and a second stepped surface perpendicular to the stator mounting surface. The handle rotates on the plate surface between the first and second stepped surfaces. The extension direction of the handle is the same as the arrangement direction of the two magnetic surfaces. When the handle abuts against the first stepped surface, the fixture can attract the stator. When the handle abuts against the second stepped surface, the fixture has no attraction force on the stator.

[0015] Furthermore, the non-magnetic cover plate has a notch on the plate surface connected to the second step surface that communicates with the positioning hole, and the handle extends beyond the positioning disc by a size smaller than the size of the notch, so that the handle can pass through the notch when it abuts against the second step surface.

[0016] Furthermore, the end face of the non-magnetic cover plate facing away from the non-magnetic base includes a first plane and a second plane located in different planes, and the thickness of the non-magnetic cover plate located on the first plane is less than the thickness of the non-magnetic cover plate located on the second plane. When the handle is rotated in the first plane, the connection between the first plane and the second plane forms a first step surface and a second step surface.

[0017] The beneficial effects of the utility model are:

[0018] (1) This utility model uses magnetic field to adsorb and fix the stator core. It has a simple structure and is conducive to the placement of small cores while meeting the winding tension of enameled wire.

[0019] (2) The tooling components described in this utility model do not need to be fixed by welding or other processes. The tooling can be assembled by structural limiting, which makes it easy to disassemble.

[0020] (3) The present invention has a notch for the handle to pass through on the non-magnetic cover plate. After the stator winding is completed, the non-magnetic cover plate can be removed to facilitate the removal of the stator. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is an exploded view of a specific embodiment of the magnetic adsorption tooling for stator winding described in this utility model;

[0023] Figure 2 This is a front view of the stator winding magnetic adsorption fixture described in this utility model in the locked state;

[0024] Figure 3 This is an internal sectional view of the magnetic adsorption fixture for stator winding described in this utility model when it is in the locked state;

[0025] Figure 4 This is a magnetic field distribution diagram of the stator winding magnetic adsorption fixture described in this utility model when it is in the locked state;

[0026] Figure 5 This is a front view of the stator winding magnetic adsorption fixture of this utility model in the released state;

[0027] Figure 6This is an internal cross-sectional view of the stator winding magnetic adsorption fixture described in this utility model when it is in the released state;

[0028] Figure 7 This is a magnetic field distribution diagram of the stator winding magnetic adsorption fixture described in this utility model when it is in the released state;

[0029] Figure 8 This is a state diagram of the stator core being attracted by the magnetic adsorption tooling for stator winding described in this utility model;

[0030] Figure 9 This is a schematic diagram of the assembly of the non-magnetic base and the magnetic body in this utility model;

[0031] Figure 10 This is a perspective view of the non-magnetic base in this utility model;

[0032] Figure 11 This is a front view of the non-magnetic cover plate in this utility model;

[0033] Figure 12 This is a perspective view of the non-magnetic cover plate in this utility model;

[0034] Figure 13 This is a perspective view of the knob in this utility model;

[0035] Figure 14 This is a schematic diagram showing the arrangement of the two magnetic conductors in this utility model.

[0036] In the diagram, 1 is a magnetic conductor, 101 is an arc-shaped contact surface, 2 is a non-magnetic base, 201 is a base plate, 202 is a U-shaped plate, 3 is a permanent magnet, 301 is a magnetic surface, 4 is a non-magnetic cover plate, 401 is a serrated edge, 402 is a positioning hole, 403 is a first step surface, 404 is a second step surface, 405 is a first plane, 406 is a second plane, 407 is a notch, 5 is a knob, 501 is a positioning disc, 502 is a handle, 6 is a mounting groove, 7 is a baffle, 8 is a cylindrical cavity, 9 is a stator mounting surface, 10 is a positioning surface, and 11 is a stator core. Detailed Implementation

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] Example 1

[0039] like Figures 1-9As shown, a magnetic adsorption fixture for stator winding includes two magnetic conductors 1, a non-magnetic base 2, a permanent magnet 3, a non-magnetic cover plate 4, and a knob 5. The two magnetic conductors 1 each have an arc-shaped contact surface 101 with equal radius (e.g., ...). Figure 14 (As shown); the non-magnetic base 2 has a mounting groove 6 to accommodate two magnetic bodies 1. Two baffles 7 are symmetrically arranged within the mounting groove 6, dividing it into two mounting areas. The two magnetic bodies 1 are located in one of these areas, with their ends joined by the baffles 7. The arc-shaped contact surface 101 and the baffles 7 form a complete cylindrical cavity 8. The baffles 7 ensure that the connection point between the two magnetic bodies 1 has a non-magnetic area. The mounting groove 6 has an opening on one radial side. A stator mounting surface 9 is formed. When the stator is fixed by the tooling, the stator mounting surface 9 is in contact with the stator core 11. Therefore, the mounting surface shapes of the stator mounting surface 9 and the stator core 11 are the same. The permanent magnet 3 is located inside the cylindrical cavity 8. The permanent magnet 3 has a magnetically conductive surface 301 that mates with the arc-shaped contact surface 101. The non-magnetically conductive cover plate 4 covers the end face of the non-magnetically conductive base 2 along the axial direction of the magnetically conductive body 1. The non-magnetically conductive cover plate 4 confines the magnetically conductive body 1 and the permanent magnet 3 within the mounting groove 6. The knob 5 is fixed to the end of the permanent magnet 3. The thickness of both baffles 7 is less than the thickness of the permanent magnet 3, so that the magnetically conductive surface 301 is always in contact with the arc-shaped contact surface 101 during the rotation of the permanent magnet 3.

[0040] Magnetic field lines originate from the N pole outside the permanent magnet 3. The magnetic field lines always follow the path of least magnetic resistance (maximum magnetic permeability) and return to the S pole to form a closed magnetic circuit.

[0041] Since the contact surface between the magnetic conductor 1 and the magnetic conductive surface 301 of the permanent magnet 3 is a cylindrical surface, and the arc-shaped magnetic conductive surfaces 301 on both sides of the permanent magnet 3 are attached to the cylindrical cavity 8, the permanent magnet 3 can rotate inside the cylindrical cavity 8. The knob 5 is exposed through the hole in the center of the non-magnetic cover plate 4, and the operator can rotate the knob 5 to control the rotation of the permanent magnet 3.

[0042] When the tooling is in the released state, such as Figure 6 As shown, the magnetic conductive surface 301 of the permanent magnet 3 faces the baffle 7. Since the thickness of the baffle 7 is less than the thickness of the permanent magnet 3, a portion of the magnetic conductive surface 301 can still contact the arc-shaped contact surface 101 of the two magnetic conductors 1, such as... Figure 7 As shown, at this time, the magnetic lines of force emitted by the permanent magnet 3 can be closed by the two magnetic conductors 1 in contact with it. No magnetic lines of force will pass through the stator core 11, so the tooling will not generate an attractive force on the stator core 11, and the stator core 11 can be taken out smoothly.

[0043] When the tooling is in the locked state, such as Figure 3 and Figure 8 As shown, the magnetically conductive surface 301 is completely in contact with the arc-shaped contact surface 101, while there is no transition of the magnetically conductive surface 301 at the baffle 7, as... Figure 4 As shown, the stator core 11 is usually made of a material with high magnetic permeability. Since the two baffles 7 are made of non-magnetic material, most of the magnetic lines of force will pass through the stator core 11 to form a closed magnetic circuit, thereby generating a certain attraction force on the stator core 11.

[0044] The mounting surface of the stator core 11 is a plane. Therefore, the surfaces of the non-magnetic base 2, the magnetic conductor 1, and the non-magnetic cover plate 4 facing the stator mounting end are all planes, while the remaining outer surfaces are preferably arc-shaped. This allows them to bend in the same direction as the internal cylindrical cavity 8, while also reducing external sharp edges.

[0045] Non-magnetic base 2:

[0046] like Figure 9 and Figure 10 As shown, the non-magnetic base 2 includes a base plate 201 and a U-shaped plate 202 fixed to the base plate 201 to form a mounting groove 6. The U-shaped opening of the U-shaped plate 202 forms a stator mounting surface 9. Both baffles 7 are connected to the base plate 201, and two magnetic conductors 1 are respectively filled between the two baffles 7 and the U-shaped plate 202. Figure 10 As shown, the two baffles 7 are located at the bottom and opening of the U-shaped plate 202, respectively, and are arranged at the center of symmetry of the U-shaped plate 202. The magnetic conductor 1 is arranged on both sides of the two baffles 7. The outer peripheral surface of the magnetic conductor 1 is in contact with the inner peripheral surface of the U-shaped plate 202, and the two ends of the magnetic conductor 1 are connected to the two baffles 7 respectively.

[0047] During assembly, first insert the two magnetic conductors 1 into the non-magnetic base 2. The magnetic conductors 1 can be fixed to the non-magnetic base 2 by adhesive bonding or pressed between the non-magnetic cover plate 4 and the non-magnetic base 2 for fixation. The base plate 201 of the non-magnetic base 2 has two protruding baffles 7. The two magnetic conductors 1 are respectively installed on both sides of the two baffles 7. The magnetic conductors 1 on both sides are joined to form a cylindrical cavity 8. The permanent magnet 3 is installed in the cylindrical cavity 8 formed by the two magnetic conductors 1. The permanent magnet 3 and the knob 5 are fixed together, which can be connected by adhesive bonding. Finally, the non-magnetic cover plate 4 is added, which can be directly fixed to the non-magnetic base 2.

[0048] To ensure stable installation of the stator core 11, a positioning structure needs to be set on the tooling. The non-magnetic cover plate 4 has a serrated edge 401 on the side facing the stator mounting surface 9 that mates with the end face of the core (e.g., Figure 8 and Figure 11 As shown). In a further configuration, the base plate 201 protrudes from the U-shaped opening of the U-shaped plate 202 and forms a positioning surface 10 that abuts against the stator (as shown). Figure 9(As shown). During installation, one end of the stator core 11 is inserted into the serrated edge 401 and is limited by the serrated edge 401 on the non-magnetic cover plate 4. One end of the stator core 11 abuts against the positioning surface 10 and is longitudinally limited by the positioning surface 10. The longitudinal direction refers to the direction parallel to the center of the cylindrical cavity 8.

[0049] Example 2

[0050] In Embodiment 1, the non-magnetic cover plate 4 can be directly fixed to the end of the non-magnetic base 2. In this embodiment, the non-magnetic cover plate 4 is pressed and fixed onto the non-magnetic base 2 by the knob 5. The specific structure is as follows: Figure 12 and Figure 13 As shown, the knob 5 includes a positioning disc 501 and a handle 502. The center of the non-magnetic cover plate 4 has a positioning hole 402 that mates with the positioning disc 501. The distance between the two magnetic surfaces 301 is greater than the diameter of the positioning hole 402. The handle 502 extends radially out of the positioning disc 501. One end of the non-magnetic cover plate 4 is attached to the non-magnetic base 2, and the handle 502 is locked at the other end of the non-magnetic cover plate 4.

[0051] Since the permanent magnet 3 and the cylindrical cavity 8 are coaxial, the cooperation between the positioning hole 402 and the positioning disk 501 (the positioning disk 501 is fixed to the permanent magnet 3) can keep the center of the non-magnetic cover plate 4 fixed, and the radial extension of the handle 502 can limit the axial movement of the non-magnetic cover plate 4.

[0052] Example 3

[0053] Since the magnetic conductive surface 301 of the permanent magnet 3 needs to be directly aligned with the baffle 7 to achieve the release state, and the permanent magnet 3 is located inside the fixture and is inconvenient to observe, it is necessary to set a mark indicating the release state or locking state on the outside of the fixture. This embodiment makes the following improvements based on the above embodiment:

[0054] like Figure 12 As shown, one end of the non-magnetic cover plate 4 that engages with the handle 502 has a first stepped surface 403 parallel to the stator mounting surface 9 and a second stepped surface 404 perpendicular to the stator mounting surface 9. The handle 502 rotates on the plate surface between the first stepped surface 403 and the second stepped surface 404. The extension direction of the handle 502 is the same as the arrangement direction of the two magnetic surfaces 301. When the handle 502 abuts against the first stepped surface 403, the fixture can attract the stator. When the handle 502 abuts against the second stepped surface 404, the fixture has no attraction force on the stator.

[0055] The first step surface 403 and the second step surface 404 are used to limit the rotation angle of the knob 5 (together with the permanent magnet 3), as well as the locked and released positions. Figure 2 and Figure 8As shown, the locking position is parallel to the serrated edge 401, that is, the first step surface 403 is the locking position. The magnetic field is strongest when the magnetic lines of force pass through the stator core 11, and the attraction to the stator core 11 is also the strongest. If it deviates, the attraction is weaker or even non-existent, and the stator core 11 cannot be fixed to the fixture; Figure 5 As shown, the release position is located in the direction perpendicular to the sawtooth edge 401, that is, the second step surface 404 is the release position, ensuring that the magnetic lines of force do not pass through the stator core 11 during release, and there is no attraction on the stator core 11, so that it can be removed smoothly.

[0056] The permanent magnet 3 has an waist-shaped structure, and the magnetic conductive surfaces 301 on both sides are arc-shaped. The orientation of the permanent magnet 3, that is, the orientation of the N and S poles, is consistent with the long side of the handle 502 on the knob 5. This makes it easier for the user to judge the position of the permanent magnet 3 (magnetic field) based on the position of the handle 502, thus making the operation simpler.

[0057] The first step surface 403 and the second step surface 404 divide the end of the non-magnetic cover plate 4 into two regions. One region is the range of rotation of the handle 502 and is in contact with the handle 502. The other region is not in contact with the handle 502. In order to avoid axial movement of the permanent magnet 3, the surface of the non-magnetic cover plate 4 that is in contact with the handle 502 is preferably a plane, while the region that is not in contact with the handle 502 can be arbitrarily set.

[0058] For ease of processing, in a preferred embodiment, the end face of the non-magnetic cover plate 4 facing away from the non-magnetic base 2 includes a first plane 405 and a second plane 406 located on different planes, and the thickness of the non-magnetic cover plate 4 located on the first plane 405 is less than the thickness of the non-magnetic cover plate 4 located on the second plane 406. The handle 502 rotates within the first plane 405, and the connection between the first plane 405 and the second plane 406 forms a first step surface 403 and a second step surface 404.

[0059] Example 4

[0060] The above embodiments do not consider the disassembly of the tooling. After the tooling is assembled, only the magnetic conductor 1 and the permanent magnet 3 are detachable components. However, there is a certain attraction between the magnetic conductor 1 and the permanent magnet 3. Without removing the non-magnetic cover plate 4, it is difficult to remove the magnetic conductor 1 from the stator mounting surface 9. Therefore, this embodiment further improves upon embodiment three, enabling the non-magnetic cover plate 4 to be removed when the tooling is in the released state. The specific structure is as follows:

[0061] like Figure 11As shown, the non-magnetic cover plate 4 has a notch 407 on its surface where it connects to the second stepped surface 404, which communicates with the positioning hole 402. The handle 502 extends beyond the positioning disc 501 by a size smaller than the notch 407, so that the handle 502 can pass through the notch 407 when it abuts against the second stepped surface 404. When the handle 502 is in the released position (at the notch 407), the non-magnetic cover plate 4 can be disengaged (e.g., ...). Figure 5 As shown), when the handle 502 rotates away from the notch 407, the handle 502 abuts against the first plane 405, making it impossible for the non-magnetic cover plate 4 to come out.

[0062] In the description of this utility model, it should be understood that the terms "center", "left", "right", "bottom", "inner", "outer", "axial", "radial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0063] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0064] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0065] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A magnetic adsorption fixture for stator winding, characterized in that, include: Two magnetic conductors (1), each of the two magnetic conductors (1) having an arc-shaped contact surface (101) with equal radius. A non-magnetic base (2) has a mounting groove (6) for accommodating two magnetic bodies (1). Two baffles (7) are symmetrically arranged in the mounting groove (6). The two baffles (7) are respectively connected to the ends of the two magnetic bodies (1). The arc-shaped contact surface (101) and the baffles (7) form a complete cylindrical cavity (8). The radial side of the mounting groove (6) opens to form a stator mounting surface (9). A permanent magnet (3) is located inside the cylindrical cavity (8), and the permanent magnet (3) has a magnetically conductive surface (301) that cooperates with the arc-shaped contact surface (101). The non-magnetic cover plate (4) covers the end face of the non-magnetic base (2) along the axial direction of the magnetic body (1), and the non-magnetic cover plate (4) confines the magnetic body (1) and the permanent magnet (3) within the mounting groove (6); The knob (5) is fixed to the end of the permanent magnet (3); The thickness of both baffles (7) is less than the thickness of the permanent magnet (3), so that the magnetic conductive surface (301) of the permanent magnet (3) is always in contact with the arc-shaped contact surface (101) during the rotation of the permanent magnet (3).

2. The magnetic adsorption fixture for stator winding according to claim 1, characterized in that: The non-magnetic base (2) includes a base plate (201) and a U-shaped plate (202) fixed to the base plate (201) to form an installation groove (6). The U-shaped opening of the U-shaped plate (202) forms a stator mounting surface (9). Both baffles (7) are connected to the base plate (201). Two magnetic conductors (1) are respectively filled between the two baffles (7) and the U-shaped plate (202).

3. The magnetic adsorption fixture for stator winding according to claim 1, characterized in that: The knob (5) includes a positioning disc (501) and a handle (502). The center of the non-magnetic cover plate (4) has a positioning hole (402) that mates with the positioning disc (501). The distance between the two magnetic surfaces (301) is greater than the diameter of the positioning hole (402). The handle (502) extends radially out of the positioning disc (501). One end of the non-magnetic cover plate (4) is attached to the non-magnetic base (2), and the handle (502) is locked at the other end of the non-magnetic cover plate (4).

4. The magnetic adsorption fixture for stator winding according to claim 2, characterized in that: The surfaces of the non-magnetic base (2), the magnetic conductor (1), and the non-magnetic cover plate (4) facing the stator mounting end are all flat, while the rest of the outer surfaces are arc-shaped.

5. The magnetic adsorption fixture for stator winding according to claim 4, characterized in that: The non-magnetic cover plate (4) has a serrated edge (401) on the side facing the stator mounting surface (9) that matches the end face of the stator core (11).

6. The magnetic adsorption fixture for stator winding according to claim 5, characterized in that: The base plate (201) protrudes from the U-shaped opening of the U-shaped plate (202) and forms a positioning surface (10) that abuts against the stator core (11).

7. The magnetic adsorption fixture for stator winding according to claim 1, characterized in that: The magnetic conductor (1) is fixed to the non-magnetic base (2).

8. The magnetic adsorption fixture for stator winding according to claim 7, characterized in that: The non-magnetic cover plate (4) has a first step surface (403) parallel to the stator mounting surface (9) and a second step surface (404) perpendicular to the stator mounting surface (9) at one end of the handle (502). The handle (502) rotates on the plate surface between the first step surface (403) and the second step surface (404). The extension direction of the handle (502) is the same as the arrangement direction of the two magnetic surfaces (301). When the handle (502) abuts against the first step surface (403), the tooling can attract the stator core (11). When the handle (502) abuts against the second step surface (404), the tooling has no attraction to the stator core (11).

9. The magnetic adsorption fixture for stator winding according to claim 8, characterized in that: The non-magnetic cover plate (4) has a notch (407) on the plate surface connected to the second step surface (404) that communicates with the positioning hole (402). The handle (502) extends beyond the positioning disk (501) by a size smaller than the notch (407) so that the handle (502) can pass through the notch (407) when it abuts against the second step surface (404).

10. The magnetic adsorption fixture for stator winding according to claim 8, characterized in that: The end face of the non-magnetic cover plate (4) facing away from the non-magnetic base (2) includes a first plane (405) and a second plane (406) in different planes. The thickness of the non-magnetic cover plate (4) where the first plane (405) is located is less than the thickness of the non-magnetic cover plate (4) where the second plane (406) is located. The handle (502) rotates in the first plane (405). The connection between the first plane (405) and the second plane (406) forms a first step surface (403) and a second step surface (404).

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