A device and bonding method for assisting motor main pole magnetic steel bonding

Abstract

The present invention discloses a device and bonding method for assisting the bonding of the main pole magnets of a motor. The device includes a positioning base, a limiting cover plate, and a butterfly head bolt. The positioning base includes a base plate and a base I and a base II with convex parts arranged at both ends of the base plate. The base I is a semi-open end, and its height is consistent with the height of the main pole to facilitate the sliding of the magnet. The base II is a closed end, and its height is consistent with the height after bonding the magnet, and is used to limit the magnet. The limiting cover plate includes a cover plate, and side plates with sliding grooves are provided on both sides of the inner plate surface of the cover plate, and a stopper III is also provided at one end. The limiting cover plate, the positioning base, the main pole, and the magnet are assembled together by the cooperation of the sliding groove and the convex part, and the fixation of the butterfly head bolt. The device can be used regardless of whether the magnet is magnetized first or later, can ensure the symmetry and consistency of the magnet bonding, has a low manufacturing cost, and can be used repeatedly.

Description

Technical Field

[0001] The present invention relates to the technical field of bonding main magnetic poles of DC motors, and in particular to a device and a bonding method for bonding auxiliary motor main pole magnetic steel. Background Art

[0002] Because of its good speed regulation performance, DC motors are still widely used in many occasions, such as providing power, being used as power supplies, and being used as exciters, etc., such as industrial machine tools, large equipment, and agricultural machinery such as tractors and harvesters. The stator part of a DC motor includes main magnetic poles, commutator poles, a frame, and end covers. Among them, the function of the main magnetic poles is to establish a main magnetic field. The magnetic field generated by the armature current interacts with the main magnetic field to generate electromagnetic torque, causing the motor to rotate and drive the load. Therefore, the uniformity of the main magnetic field has an important influence on the motor torque, speed stability, noise, efficiency, etc. The permanent magnet DC motor is formed by bonding the main magnetic poles to the magnets. In the production process, in addition to stabilizing the magnetic properties of the magnets, it is crucial to improve the symmetry and consistency of the bonding between the magnets and the main poles while ensuring the performance of the magnets.

[0003] To improve production efficiency, motor manufacturers currently use cyanoacrylates for manual bonding of magnets and main poles, with positioning typically performed visually. While this method is fast, it cannot guarantee the symmetry and consistency of the magnets after bonding. Some manufacturers, taking this into account, have adopted automated equipment for manufacturing. However, this approach carries high costs and ongoing maintenance, and requires long lead times, making it unsuitable for prototype or small-batch production. Furthermore, cyanoacrylates generally have a narrow operating temperature range and are unsuitable for environments with high or low temperature requirements. Summary of the Invention

[0004] The object of the present invention is to provide a device for assisting the bonding of the main pole magnetic steel of a motor, comprising a positioning base, a limiting cover plate and a butterfly head bolt.

[0005] The positioning base includes a base plate and a base I and a base II which are arranged on two ends of the base plate in opposite directions.

[0006] An inner cavity for placing the main pole is provided between the base I and the base II.

[0007] Both sides of the base I and the base II are provided with convex parts.

[0008] The base I is a semi-open end of the positioning base, including a support I and a stopper I; the base II is a closed end of the positioning base, including a support II and a stopper II.

[0009] The support I and support II have the same structure and are arranged at two ends of the bottom plate relative to each other to support the main pole.

[0010] The stopper I and the stopper II are block-shaped structures, used for fixing the main pole, and their top surfaces are both arc surfaces.

[0011] The radian of the camber of the stopper 1 is the same as the radian of the inner camber of the main pole shoe. When the main pole is located in the inner cavity, the height of the stopper 1 is the same as the height of the main pole so that the magnet can slide in.

[0012] The radian of the arc surface of the stopper II is the same as the radian of the inner arc surface of the magnetic steel. When the magnetic steel is bonded, the magnetic steel is located above the main pole, at this time, the height of the stopper II is the same as the height of the magnetic steel.

[0013] The limiting cover plate includes a stopper III, a side plate and a cover plate.

[0014] The inner surface of the cover plate is a curved surface, and its curvature is the same as that of the inner curved surface of the magnetic steel.

[0015] Side panels are provided on both sides of the inner surface of the cover plate.

[0016] The side plate is provided with a sliding groove which is slidably matched with the protrusion.

[0017] A stopper III is provided at one end of the inner plate surface of the cover plate, and the end provided with the stopper III is recorded as an open end, and the other end of the inner plate surface is recorded as a closed end.

[0018] When the main pole and the magnet are assembled, the limit cover is fixed to the positioning base by butterfly head bolts. At this time, the inner plate surface of the limit cover is in contact with the inner arc surface of the magnet.

[0019] Furthermore, the shapes of the support I and the support II are adapted to the outer contour of the main pole.

[0020] Furthermore, the height of the stopper II is greater than the height of the stopper I.

[0021] Furthermore, the bottom surface of the stopper III is a curved surface, and its curvature is the same as that of the top surface of the stopper I.

[0022] When the limiting cover plate and the positioning base are assembled together, the arc surface of the stopper III fits with the arc surface of the stopper I.

[0023] Furthermore, the stopper I and the stopper II are provided with threaded blind holes; the limit cover is provided with a waist-shaped hole;

[0024] The butterfly head bolt passes through the waist-shaped hole and the threaded blind hole to assemble the limiting cover plate on the positioning base.

[0025] Furthermore, the size of the positioning base is adapted to the size of the limiting cover.

[0026] Furthermore, the positioning base and the limiting cover are made of aluminum alloy.

[0027] Furthermore, the edges and working surfaces of the positioning base and the limiting cover are rounded.

[0028] Furthermore, when the main pole and the magnetic steel are bonded,

[0029] The cooperation between the convex part and the slide groove limits the circumferential movement of the main pole and the magnet;

[0030] The cooperation of stopper I, stopper II and stopper III limits the axial movement of the main pole and the magnet.

[0031] The base and the limit cover are fastened by butterfly head bolts to limit the longitudinal movement of the main pole and the magnetic steel on the vertical plane.

[0032] Another object of the present invention is to provide a bonding method based on a device for bonding auxiliary motor main pole magnetic steel, comprising the following steps:

[0033] 1) Apply release agent to the contact areas between the positioning base, limiting cover and main pole or magnetic steel;

[0034] 2) Place the main pole on support I and support II, and apply DG-02 modified epoxy resin adhesive on the inner arc surface of the main pole shoe and the outer arc surface of the magnetic steel;

[0035] 3) Slide several magnets from the semi-open end of the positioning base onto the inner arc surface of the main pole shoe in sequence, and adjust the position of the magnets so that they are aligned with the edge of the main pole;

[0036] At this time, due to the repulsive force between the magnets, the overall length of the magnet exceeds the length of the main pole;

[0037] 4) Slide the limit cover plate into the semi-open end of the positioning base so that the side plate, with the cooperation of the protrusion and the slide groove, can buckle the magnetic steel;

[0038] 5) Fix the positioning base, then push the limit cover from the semi-open end of the positioning base to the closed end of the positioning base. At this time, the magnet is also pushed into place. Then, fix the limit cover and the positioning base together with the butterfly head bolts;

[0039] 6) After assembly, place the main magnetic pole and the device in an oven, heat it to 80°C ± 5°C, keep it warm for 2-3 hours, and remove the main magnetic pole and the device after the oven cools to room temperature.

[0040] 7) Remove the butterfly head bolts and limit cover, take out the main magnetic pole, and clean the remaining glue on the surface of the main magnetic pole.

[0041] The technical effects of the present invention are undoubted, and the beneficial effects of the present invention are as follows:

[0042] 1. The device can be used regardless of whether the magnet is magnetized first or later. It has a low manufacturing cost, beautiful appearance, and can be used repeatedly.

[0043] 2. Workers can complete the assembly and bonding of the main magnetic poles by manual bonding or using simple tools, which ensures the symmetry and consistency of the magnetic steel bonding and reduces the equipment investment cost.

[0044] 3. Epoxy resin adhesive is used for bonding, and the low temperature 80℃ curing process effectively prevents the magnetic steel from demagnetizing at high temperature. It can be used in low and high temperature environments and can quickly achieve the bonding of samples and small batches of main pole magnetic steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Schematic diagram of the main pole magnetic steel bonding device;

[0046] Figure 2 for Figure 1 sectional view of

[0047] Figure 3 This is a schematic diagram of the positioning base;

[0048] Figure 4 Schematic diagram of the limiting cover;

[0049] Figure 5 Schematic diagram of the main pole;

[0050] Figure 6 Schematic diagram of magnetic steel;

[0051] Figure 7 Schematic diagram of bonding the magnet steel and the main pole to form the main magnetic pole.

[0052] In the figure: 1-positioning base; 101-base I; 1011-support I; 1012-stopper I; 102-base II; 1021-support II; 1022-stopper II; 103-threaded blind hole; 104-convex portion; 105-bottom plate; 2-limiting cover plate; 201-stopper III; 202-closed end; 203-waist-shaped hole; 204-slide groove; 205-side plate; 206-cover plate; 3-butterfly head bolt; 4-main pole; 5-magnet. DETAILED DESCRIPTION

[0053] The present invention will be further described below with reference to the following examples, but it should not be understood that the scope of the present invention is limited to the following examples. Without departing from the above technical ideas of the present invention, various substitutions and modifications can be made according to common technical knowledge and customary means in the art, and all should be included in the scope of protection of the present invention.

[0054] Example 1:

[0055] See also Figure 1 、 Figure 2 A device for assisting the bonding of the main pole magnetic steel of a motor includes a positioning base 1, a limiting cover plate 2 and a butterfly head bolt 3.

[0056] See also Figure 3 The positioning base 1 includes a base plate 105 and a base I101 and a base II102 arranged on two ends of the base plate 105.

[0057] An inner cavity for placing the main pole 4 is provided between the base I101 and the base II102.

[0058] Both sides of the base I101 and the base II102 are provided with protrusions 104.

[0059] The base I101 is a semi-open end of the positioning base 1, including a support I1011 and a stopper I1012, and the support I1011 is located on the inner side of the stopper I1012.

[0060] The base II102 is the closed end of the positioning base 1, including a support II1021 and a stopper II1022, and the support II1021 is located on the inner side of the stopper II1022.

[0061] See also Figure 3 , the support I1011 and the support II1021 are located between the stopper I1012 and the stopper II1022.

[0062] The support I 1011 and the support II 1021 have the same structure and are arranged at two ends of the bottom plate 105 relative to each other, located below the main pole 4, for supporting the main pole 4.

[0063] The stopper I1012 and the stopper II1022 are block-shaped structures, located at both ends of the main pole 4, and are used to fix the main pole 4. The top surfaces of the stopper I1012 and the stopper II1022 are both arc surfaces.

[0064] The curvature of the arc surface of the stopper I1012 is the same as the curvature of the inner arc surface of the pole shoe of the main pole 4.

[0065] See also Figure 7 The curvature of the inner arc surface of the main pole 4 pole shoe is the same as the curvature of the outer arc surface of the magnetic steel 5.

[0066] When the main pole 4 is located in the inner cavity, the height of the stopper I1012 is the same as that of the main pole 4 so that the magnet 5 can slide in.

[0067] The arc of the stopper II 1022 is the same as the arc of the inner arc of the magnet 5. When the magnet 5 is bonded, the magnet 5 is located above the main pole 4. At this time, the height of the stopper II 1022 is the same as that of the magnet 5, so as to limit the magnet from sliding into position.

[0068] See also Figure 4 The limiting cover plate 2 includes a stopper III 201 , a side plate 205 and a cover plate 206 .

[0069] The inner surface of the cover plate 206 is a curved surface, and its curvature is the same as that of the inner curved surface of the magnetic steel 5 .

[0070] Side panels 205 are provided on both sides of the inner surface of the cover plate 206 .

[0071] The side plate 205 is provided with a sliding groove 204 that slidably cooperates with the protrusion 104 .

[0072] A stopper III 201 is provided at one end of the inner plate surface of the cover plate 206 , and the end provided with the stopper III 201 is recorded as an open end, and the other end of the inner plate surface is recorded as a closed end 202 .

[0073] When the main pole 4 and the magnet 5 are assembled, the limit cover 2 is fixed to the positioning base 1 by the butterfly head bolt 3. At this time, the inner plate surface of the limit cover 2 is in contact with the inner arc surface of the magnet 5.

[0074] Example 2:

[0075] The main structure of this embodiment is the same as that of embodiment 1. Furthermore, the shapes of the support I 1011 and the support II 1021 are adapted to the outer contour of the main pole 4 .

[0076] The support I1011 or support II1021 is two symmetrical block-shaped structures with a hollow center, used to place and support the main pole 4. Figure 3 .

[0077] Example 3:

[0078] The main structure of this embodiment is the same as any one of Embodiments 1 to 2. Furthermore, the height of the stopper II 1022 is greater than the height of the stopper I 1012 .

[0079] Example 4:

[0080] The main structure of this embodiment is the same as any one of Embodiments 1 to 3. Furthermore, the bottom surface of the stopper III 201 is a curved surface, and its curvature is the same as that of the top surface of the stopper I 1012 .

[0081] When the limiting cover plate 2 and the positioning base 1 are assembled together, the arc surface of the stopper III201 fits with the arc surface of the stopper I1012.

[0082] Example 5:

[0083] The main structure of this embodiment is the same as any one of Embodiments 1 to 4. Furthermore, threaded blind holes 103 are provided on the stopper I 1012 and the stopper II 1022 .

[0084] The limiting cover plate 2 is provided with a waist-shaped hole 203 .

[0085] The butterfly head bolt 3 passes through the waist-shaped hole 203 and the threaded blind hole 103 to assemble the limiting cover plate 2 on the positioning base 1.

[0086] Example 6:

[0087] The main structure of this embodiment is the same as any one of Embodiments 1 to 5. Furthermore, the size of the positioning base 1 is adapted to the size of the limiting cover 2 .

[0088] Example 7:

[0089] The main structure of this embodiment is the same as any one of Embodiments 1 to 6. Furthermore, the positioning base 1 and the limiting cover plate 2 are made of aluminum alloy, which is easy to process, can prevent being adsorbed by magnetic steel, and has a certain strength.

[0090] Example 8:

[0091] The main structure of this embodiment is the same as any one of Embodiments 1 to 7. Furthermore, the edges and working surfaces of the positioning base 1 and the limiting cover 2 are rounded to avoid accidental damage to parts or workers during use.

[0092] Example 9:

[0093] The main structure of this embodiment is the same as any one of the embodiments 1 to 8. Furthermore, when the main pole 4 and the magnetic steel 5 are bonded,

[0094] The cooperation between the protrusion 104 and the slide groove 204 limits the circumferential movement of the main pole 4 and the magnetic steel 5 .

[0095] The axial movement of the main pole 4 and the magnetic steel 5 is restricted by the cooperation of the stopper I1012, the stopper II1022 and the stopper III201.

[0096] The base 1 and the limiting cover plate 2 are fixedly positioned by the butterfly head bolts 3, thereby limiting the longitudinal movement (ie, Z direction) of the main pole 4 and the magnetic steel 5 on the vertical plane.

[0097] The horizontal plane refers to a plane parallel to the surface of the bottom plate 105 , and the vertical plane refers to a plane perpendicular to the surface of the bottom plate 105 .

[0098] Example 10:

[0099] A bonding method for the device for bonding the main pole magnetic steel of an auxiliary motor according to embodiments 1 to 9 comprises the following steps:

[0100] 1) Apply release agent or silicone grease to the contact areas between the positioning base 1, the limiting cover 2 and the main pole 4 or the magnetic steel 5;

[0101] 2) Place the main pole 4 on the support I1011 and the support II1021, and apply DG-02 modified epoxy resin adhesive on the inner arc surface of the pole shoe of the main pole 4 and the outer arc surface of the magnetic steel 5;

[0102] 3) Slide several magnets 5 from the semi-open end of the positioning base 1 onto the inner arc surface of the pole shoe of the main pole 4, and adjust the position of the magnets 5 so that they are aligned with the edge of the main pole 4;

[0103] At this time, due to the repulsive force between the magnets, the overall length of the magnet 5 exceeds the length of the main pole 4;

[0104] 4) Slide the limiting cover plate 2 into the semi-open end of the positioning base 1 so that the side plate 205 engages the magnetic steel 5 with the cooperation of the protrusion 104 and the slide groove 204;

[0105] 5) Secure the positioning base 1, then push the limit cover 2 from the semi-open end of the positioning base 1 to the closed end of the positioning base 1. At this time, the magnet 5 is also pushed into place. Then, the limit cover 2 and the positioning base 1 are fixed together with the butterfly head bolts 3;

[0106] 6) After assembly, place the main magnetic pole and the device in an oven, heat it to 80°C ± 5°C, keep it warm for 2-3 hours, and remove the main magnetic pole and the device after the oven cools to room temperature.

[0107] 7) Remove the butterfly head bolt 3 and the limit cover 2, take out the main magnetic pole, and clean the remaining glue on the surface of the main magnetic pole.

[0108] Example 11:

[0109] The main structure of this embodiment is the same as any one of Embodiments 1 to 10. Furthermore, the present invention discloses a device and method for bonding auxiliary motor main pole magnetic steel, which is suitable for bonding block magnetic steel to the main pole in the main magnetic pole manufacturing process.

[0110] The device includes a main pole magnetic steel bonding device, including a positioning base 1, a limiting cover plate 2, and two butterfly head bolts 3; the method includes a method and steps for bonding the magnetic steel to the main pole using the device.

[0111] The main pole magnetic steel bonding device is as follows:

[0112] The positioning base 1 is shaped like a rectangular box, with the inner cavity shape consistent with the outer shape of the main pole body, and the inner cavity height is flush with the arc surface of the pole shoe, which is used for placing and fixing the main pole; the middle part in the axial direction is hollowed out to retain only the bottom and connect the bracket parts at both ends, which is convenient for holding the main pole to be placed; one end is a semi-open end, the height of which is consistent with the height of the main pole to facilitate the sliding in of the magnet, and the other end is a closed end, which is consistent with the height after the magnet is bonded, and is used to limit the position of the magnet; threaded blind holes 103 are opened on both end faces for assembly of butterfly head bolts 3; sliding grooves 204 are opened symmetrically along the axial direction, and the limiting cover plate moves along the sliding groove when opening and closing the cover.

[0113] The limiting cover plate 2 is shaped like a rectangular box cover, and the inner shape and height are consistent with the outer shape of the magnet, which is used to limit the magnet from tilting and deflecting in the tangential direction; one end is open and the other end is closed, which is used to limit the position of the magnet; along the axial direction, a waist-shaped hole 203 is opened in the middle for the butterfly head bolt 3 to pass through; along the axial direction, there are symmetrical slide grooves 204 that match the shape of the positioning base slide groove for movement.

[0114] The butterfly head bolts 3 are used to fasten the positioning base 1 and the limiting cover plate 2 .

[0115] The main pole magnetic steel bonding device is made of aluminum alloy, which is easy to process, can prevent being adsorbed by the magnetic steel, and has a certain strength.

[0116] The edges and working surfaces of the tooling are rounded to avoid accidental damage to parts or workers during use.

[0117] The device limits the position of the main pole magnet in the Y direction during bonding by cooperating the protrusion 104 and the slide groove 204 on the positioning base 1 and the limiting cover plate 2, limits the position of the main pole magnet in the Z direction during bonding by fastening the positioning base 1 and the limiting cover plate 2 by the butterfly head bolt 3, and limits the position of the main pole magnet in the X direction during bonding by the closed end of the positioning base 1 and the limiting cover plate 2, thereby ensuring the consistency of the bonding of the main pole magnet.

[0118] The bonding method of the main pole magnetic steel is as follows:

[0119] 1) Apply release agent or silicone grease to the parts of the main pole magnetic steel bonding device that are in contact with the main pole and magnetic steel.

[0120] 2) Place the main pole on the positioning base, apply an appropriate amount of DG-02 modified epoxy resin adhesive on the inner arc surface of the main pole and the bonding surface of the magnet respectively, and then slide the magnets into the inner arc of the main pole from the semi-open end of the positioning base 1 in sequence, and adjust the position of the magnets so that they are aligned with the edge of the main pole. However, due to the repulsive force between the magnets, the magnets will exceed the length of the main pole; slide the limit cover 2 from the semi-open end of the positioning base 1 so that the protrusion and the slide groove match each other, and the closed end buckles the magnet; fix the positioning base, and push the limit cover into the closed end of the positioning base manually or using a tool such as a universal horizontal clamp. At this time, the magnet will also be pushed into place, and then pass two butterfly head bolts 3 through the waist-shaped hole 203 and tighten them.

[0121] 3) After completion, place the main magnetic pole and the main pole magnetic steel bonding device into the oven, heat it to 80℃±5℃, and keep it warm for 2h~3h; then take it out after cooling to room temperature.

[0122] 4) Remove the butterfly head bolt 3, remove the main pole magnetic steel bonding device, and clean the remaining glue on the main pole surface.

[0123] Since the main pole magnet bonding device is coated with a release agent or silicone grease and will not be absorbed by the magnet, the magnet can be easily assembled and bonded. At the same time, the residual glue on the tooling can be removed with a cleaning agent without affecting the next use.

Claims

1. A device for assisting the bonding of main pole magnetic steel of a motor, characterized by: It comprises a positioning base (1), a limiting cover plate (2) and a butterfly head bolt (3); The positioning base (1) comprises a base plate (105) and a base I (101) and a base II (102) arranged on two ends of the base plate (105) relative to each other; An inner cavity for placing the main pole (4) is provided between the base I (101) and the base II (102); Both sides of the base I (101) and the base II (102) are provided with convex parts (104); The base I (101) is a semi-open end of the positioning base (1), including a support I (1011) and a stopper I (1012); the base II (102) is a closed end of the positioning base (1), including a support II (1021) and a stopper II (1022); The support I (1011) and the support II (1021) have the same structure and are arranged at two ends of the bottom plate (105) relative to each other, and are used to support the main pole (4); The stopper I (1012) and the stopper II (1022) are block-shaped structures, used for fixing the main pole (4), and their top surfaces are both arc surfaces; The radian of the arc surface of the stopper I (1012) is the same as the radian of the inner arc surface of the pole shoe of the main pole (4); when the main pole (4) is located in the inner cavity, the height of the stopper I (1012) is the same as the height of the main pole (4) so ​​that the magnetic steel (5) can slide in; The radian of the arc surface of the stopper II (1022) is the same as the radian of the inner arc surface of the magnetic steel (5); when the magnetic steel (5) is bonded, the magnetic steel (5) is located above the main pole (4), and at this time, the height of the stopper II (1022) is the same as the height of the magnetic steel (5), so as to limit the magnetic steel from sliding into position; The position-limiting cover plate (2) comprises a stopper III (201), a side plate (205) and a cover plate (206); The inner surface of the cover plate (206) is a curved surface, and its curvature is the same as that of the inner curved surface of the magnetic steel (5); Side panels (205) are provided on both sides of the inner surface of the cover plate (206); The side plate (205) is provided with a sliding groove (204) that slidably cooperates with the protrusion (104); A stopper III (201) is provided at one end of the inner plate surface of the cover plate (206), the end provided with the stopper III (201) is recorded as an open end, and the other end of the inner plate surface is recorded as a closed end (202); When the main pole (4) and the magnetic steel (5) are assembled, the limiting cover plate (2) is fixed to the positioning base (1) by the butterfly head bolt (3). At this time, the inner plate surface of the limiting cover plate (2) is in contact with the inner arc surface of the magnetic steel (5).

2. The device for assisting the bonding of the main pole magnetic steel of a motor according to claim 1, characterized in that: The shapes of the support I (1011) and the support II (1021) are adapted to the outer contour of the main pole (4).

3. The device for assisting in bonding the main pole magnetic steel of a motor according to claim 1, characterized in that: The height of the stopper II (1022) is greater than the height of the stopper I (1012).

4. The device for assisting in bonding the main pole magnetic steel of a motor according to claim 1, characterized in that: The bottom surface of the stopper III (201) is a curved surface, and its curvature is the same as that of the top surface of the stopper I (1012); When the limiting cover plate (2) and the positioning base (1) are assembled together, the arc surface of the stopper III (201) fits in with the arc surface of the stopper I (1012).

5. The device for assisting in bonding the main pole magnetic steel of a motor according to claim 1, characterized in that: The stopper I (1012) and the stopper II (1022) are provided with threaded blind holes (103); the limiting cover plate (2) is provided with a waist-shaped hole (203); The butterfly head bolt (3) passes through the waist-shaped hole (203) and the threaded blind hole (103) to assemble the limiting cover plate (2) on the positioning base (1).

6. The device for assisting in bonding the main pole magnetic steel of a motor according to claim 1, characterized in that: The size of the positioning base (1) is compatible with the size of the limiting cover plate (2).

7. The device for assisting in bonding the main pole magnetic steel of a motor according to claim 1, characterized in that: The positioning base (1) and the limiting cover plate (2) are made of aluminum alloy.

8. The device for assisting in bonding the main pole magnetic steel of a motor according to claim 1, characterized in that: The edges and working surfaces of the positioning base (1) and the limiting cover plate (2) are rounded.

9. The device for assisting in bonding the main pole magnetic steel of a motor according to claim 1, characterized in that: When the main pole (4) and the magnetic steel (5) are bonded, The circumferential movement of the main pole (4) and the magnetic steel (5) is restricted by the cooperation between the protrusion (104) and the slide groove (204); The axial movement of the main pole (4) and the magnetic steel (5) is restricted by the cooperation of the stopper I (1012), the stopper II (1022) and the stopper III (201); The positioning base (1) and the limiting cover plate (2) are fastened by butterfly head bolts (3), thereby limiting the longitudinal movement of the main pole (4) and the magnetic steel (5) on the vertical plane.

10. A bonding method for the device for bonding the main pole magnetic steel of an auxiliary motor according to any one of claims 1 to 9, characterized in that: The following steps are involved: 1) Apply a release agent to the contact areas between the positioning base (1), the limiting cover (2) and the main pole (4) or the magnetic steel (5); 2) placing the main pole (4) on the support I (1011) and the support II (1021), and applying DG-02 modified epoxy resin adhesive on the inner arc surface of the pole shoe of the main pole (4) and the outer arc surface of the magnetic steel (5); 3) Slide a plurality of magnets (5) from the semi-open end of the positioning base (1) onto the inner arc surface of the pole shoe of the main pole (4) in sequence, and adjust the position of the magnets (5) so that they are aligned with the edge of the main pole (4); At this time, under the repulsive force between the magnets, the overall length of the magnet (5) exceeds the length of the main pole (4); 4) Slide the limiting cover plate (2) from the semi-open end of the positioning base (1) so that the side plate (205) can buckle the magnetic steel (5) with the cooperation of the protrusion (104) and the slide groove (204); 5) Fix the positioning base (1), then push the limit cover (2) from the semi-open end of the positioning base (1) to the closed end of the positioning base (1). At this time, the magnet (5) is also pushed into place, and then the limit cover (2) and the positioning base (1) are fixed together by the butterfly head bolt (3); 6) After assembly, place the main magnetic pole and the device in an oven, heat it to 80°C ± 5°C, keep it warm for 2-3 hours, and remove the main magnetic pole and the device after the oven cools to room temperature; 7) Remove the butterfly head bolt (3) and the limit cover (2), take out the main magnetic pole, and clean the residual glue on the surface of the main magnetic pole.

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