A structural process for preventing cracking of stator potting glue of limited-angle torque motor

Abstract

The present invention relates to a structural process for preventing cracking of a stator potting glue of a limited-angle torque motor. In an initial state, the stator includes a stator assembly and epoxy resin glue. The stator assembly includes a stator housing, a stator winding assembly, an iron core positioning pin, a bonding pin, an inner sleeve, and a connecting screw. The stator assembly is potted with epoxy resin glue, and a processed stator is formed after fine processing. The potting glue of the present invention has a fully enclosed structure, effectively controls the thickness of the glue layer, solves the problem of cracking of the stator potting epoxy resin glue, and improves product quality and reliability.

Description

Technical Field

[0001] The invention relates to the technical field of micro motor technology, and in particular to a structural process for preventing cracking of a stator potting glue of a limited-angle torque motor. Background Art

[0002] The stator of a limited angle torque motor generally consists of an annular iron core, on which an annular winding is wound to form a stator winding assembly, which is then assembled with the stator housing through the positioning block on the annular iron core. In order to strengthen the structure of the stator winding assembly and prevent foreign matter from entering the motor stator, the process technology measures of stator potting epoxy resin glue are generally adopted. After potting is completed, it is combined and processed to form a stator.

[0003] The stator potting glue of limited-angle torque motor is generally composed of raw materials such as epoxy resin glue, curing agent, additives, etc., and is cured at high temperature. Thermal internal stress is generated during the heating and curing of the epoxy resin glue and the subsequent cooling process. As the glue cools and shrinks, various mechanical stresses depending on the product structure will be generated. When the combined effect of internal stress and mechanical stress exceeds the strength limit of the epoxy resin glue under the corresponding state, it can cause irreversible deformation of the glue and form cracks. Generally, active toughening agents are added to the glue for toughening modification to improve the fracture toughness of the epoxy resin glue and prevent cracking, but it is still difficult to achieve fundamental changes. The more glue, the thicker the glue layer and the simpler the structure, the easier it is for the glue layer to crack. Practice has shown that large areas of blocky colloids and too much and too thick potting glue can easily cause epoxy resin colloids to crack.

[0004] In the existing technology, the cross-section of the stator shell that cooperates with the stator winding assembly is an inverted U-shaped structure. Epoxy resin glue is poured from the open side. The initial glue layer thickness is large and difficult to control, which introduces large thermal stress. Subsequent mechanical processing introduces stress again, and radial cracks are prone to occur on the end face of the glue layer. At the same time, the inner wall of the inverted U-shaped structure of the stator shell is relatively thin, and circumferential cracks and inward bulges are prone to occur at the connection with the end face glue layer. The cracking of the glue layer will lead to the generation of excess glue particles, the reduction of the radial gap between the stator and rotor of the motor, and the internal damage of the stator armature winding. These problems seriously affect the reliability and service life of the motor. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a structural process for preventing the stator potting glue of a limited angle torque motor from cracking. The potting glue has a fully enclosed structure, effectively controls the thickness of the glue layer, solves the problem of cracking of the stator potting epoxy resin glue, and improves product quality and reliability.

[0006] The present invention solves the technical problem by the following technical solutions:

[0007] A structural process for preventing cracking of a stator potting glue of a limited-angle torque motor comprises the following steps:

[0008] S1. Stator in initial processing state:

[0009] The stator includes a stator assembly and epoxy resin glue. The stator assembly includes a stator housing, a stator winding assembly, a core positioning pin, a bonding pin, an inner sleeve, and a connecting screw. The stator winding assembly includes a core positioning block uniformly distributed in the circumferential direction, a stator armature winding, and a stator core. The stator winding assembly is circumferentially matched with the stator housing through the core positioning block. The inner circle of the outer side of the stator housing is matched with the outer circle of the core positioning block. The end face of the stator housing is provided with a plurality of stator housing through holes and stator housing countersunk through holes uniformly distributed. The other end face is provided with a plurality of stator housing screw holes uniformly distributed. The end face of the core positioning block is provided with a plurality of core positioning block through holes uniformly distributed. The core positioning pin penetrates into the stator housing through hole and the core positioning block through hole. The stator winding assembly is fixed and positioned in the circumferential direction in the stator housing.

[0010] The cross-section of the inner sleeve is an inverted L-shape, with a flange in the middle. The inner outer circle of the stator shell cooperates with the flange of the inner sleeve, and a number of flange through holes are arranged on the flange surface. The connecting screws pass through the flange through holes and the screw holes of the stator shell to connect the inner sleeve to the stator shell. A number of glue injection holes are arranged on the outer end face of the inner sleeve, and a circumferential first groove is arranged on the other end face of the inner sleeve. The chamfered end of the bonding pin is inserted into the first groove of the inner sleeve through the countersunk through hole of the stator shell. A 90° V-shaped second groove is arranged on the end face of the inner sleeve facing the stator armature winding. The outer outer circle of the inner sleeve, the inner outer circle of the inner sleeve, and the inner inner circle of the inner sleeve respectively cooperate with the outer inner circle of the stator shell, the inner circle of the core positioning block, and the inner outer circle of the stator shell, and the inner sleeve is placed in the stator shell.

[0011] S2. Assemble the stator in the initial state and add epoxy resin glue:

[0012] The manufactured stator winding assembly is coaxially installed in the stator housing. The inner circle of the outer side of the stator housing matches the outer circle of the core positioning block. The end face of the core positioning block is close to the end face of the stator housing. The through holes of the core positioning block and the through holes of the stator housing are coated with epoxy resin glue and the core positioning pins are inserted for positioning.

[0013] The outer circle of the inner sleeve matches with the inner circle of the stator housing, the inner circle of the inner sleeve matches with the inner circle of the core positioning block, the inner circle of the inner sleeve matches with the inner outer circle of the stator housing, the inner sleeve is pressed to the bottom, the chamfered end of the bonding pin is inserted into the first groove of the inner sleeve through the countersunk through hole of the stator housing, the flange through hole of the inner sleeve is aligned with the screw hole of the stator housing, and the connecting screw is screwed in to tighten;

[0014] After the inner sleeve is installed, the countersunk through hole of the stator housing faces upwards, and the bonding pin is inserted into the countersunk through hole of the stator housing and pressed to the bottom. The prepared epoxy resin glue is added along the countersunk through hole of the stator housing. The bubbles are removed during the process of adding the epoxy resin glue. After the countersunk through hole of the stator housing is filled, it is cured as required;

[0015] Make a glue pouring mold, and pour epoxy resin glue into the stator assembly through the glue pouring holes on the end face of the inner sleeve. The glue pouring holes also serve as glue risers. The amount of glue poured is guaranteed to fill the gaps inside the stator assembly. Curing is carried out according to the process requirements of the epoxy resin glue. After curing, remove the excess glue on the surface.

[0016] S3, stator in initial state after finishing and assembly:

[0017] The center hole of the stator shell, one side end face of the stator shell or one side end face of the inner sleeve are used as the initial reference for combined processing to the required size and shape. Specifically, the processing is as follows: the center hole of the stator shell is used for positioning, and the left end face of the stator assembly after potting is processed, including processing the stator shell, the core positioning pin and the bonding pin, that is, processing to the required size and shape of the stator; the left end face of the stator assembly is used for positioning, and the right end face of the stator assembly, the center hole of the stator shell, the inner and outer circles and the end face are processed, including processing the inner sleeve, the connecting screws and the stator shell, that is, the required sizes and shapes of the stator are achieved, wherein the connecting screws are removed by the above machining process, and the inner sleeve, the core positioning pin and the bonding pin are partially removed by the above machining process, and the stator winding assembly 7 and the processed stator shell, the core positioning pin, the bonding pin, the inner sleeve and the epoxy resin glue form the processed stator;

[0018] The cross section of the processed inner sleeve in the stator is an inverted Z-shape, the end surface of which closes the end surface of the stator armature winding of the stator winding assembly, and the circumferential surface of which closes the circumference of the stator winding assembly.

[0019] The advantages and positive effects of the present invention are:

[0020] 1. The present invention provides a structural process for preventing cracking of a stator potting glue of a limited-angle torque motor. An inner sleeve is used to isolate one end face and an inner circumferential surface of a stator armature winding from the external environment, while the other end face and the outer circumferential surface are isolated by a stator housing. The entire stator armature winding is enclosed by the stator housing and the inner sleeve, thereby playing an effective protective role.

[0021] 2. The present invention provides a structural process for preventing cracking of a stator potting glue of a limited angular torque motor. The circumferential wall thickness of the inner sleeve can be controlled to about 0.3 mm, which is equivalent to the inner wall thickness of the stator shell of a conventional potting glue stator. The thickness of the closed winding end can be controlled to 0.2 mm to 0.5 mm, which is generally smaller than the thickness of the conventional potting end glue layer. Therefore, relative to conventional potting solutions, the inner sleeve of the present invention does not occupy too much of the air gap size between the stator and rotor, and does not occupy too much of the axial size of the motor stator, thereby ensuring that the performance indicators of the motor do not decrease.

[0022] 3. The present invention provides a structural process for preventing cracking of the stator potting glue of a limited-angle torque motor. The inner sleeve is fastened to the bonding pin, bonding glue and potting glue through the circumferential first groove thereon; the inner sleeve and the core positioning block and the stator armature winding are filled with epoxy resin glue and fastened together. The inner sleeve is firmly connected to the stator armature and the stator winding assembly without cracking or falling off.

[0023] 4. The present invention provides a structural process for preventing cracking of the stator potting glue of a limited-angle torque motor. The end face of the inner sleeve is provided with a plurality of potting holes to realize epoxy resin potting. After the stator is assembled and processed, the potting glue is retained in the potting holes, which are convexly connected to the inner sleeve and the internal potting glue as a whole. The potting glue through hole is designed to be Φ3mm ~ Φ4mm and will not cause cracking of the colloid in the hole.

[0024] 5. The present invention provides a structural process for preventing cracking of the stator potting glue of a limited-angle torque motor. By designing the height of the inner sleeve and the axial thickness of the stator armature winding, the height difference between the two, that is, the actual thickness of the epoxy resin glue on the end face of the stator armature winding, can be controlled at about 0.3 mm, which significantly reduces the amount of glue poured on the end face of the stator armature winding and reduces thermal stress. At the same time, during the combined processing, the glue layer is not processed over a large area, but the inner sleeve structural part is processed, thereby removing the processing stress. The significant reduction in stress solves the problem of colloid cracking.

[0025] 6. The present invention provides a structural process for preventing the stator potting glue of a limited-angle torque motor from cracking. A 90° V-shaped second groove is designed on the side of the inner sleeve facing the stator armature winding to strengthen the connection between the inner sleeve and the potting glue, disperse the stress, and prevent the potting glue from cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a left-side structural schematic diagram of the stator in the initial state of the present invention;

[0027] Figure 2 This is a schematic diagram of the stator structure from the right side in the initial state of the present invention;

[0028] Figure 3 for Figure 2 Schematic diagram of the cross-section structure of the AA stator;

[0029] Figure 4 This is a left-side structural schematic diagram of the stator after processing according to the present invention;

[0030] Figure 5 This is a schematic diagram of the right side structure of the stator after processing according to the present invention;

[0031] Figure 6 for Figure 5 Schematic diagram of the stator cross-section structure after BB processing;

[0032] Figure 7 This is a schematic diagram of the inner liner structure in the initial state of the present invention;

[0033] Figure 8 for Figure 7 Schematic diagram of the cross-section structure of the CC inner bushing;

[0034] Fig. 9 for Figure 8 Enlarged view of the first groove in the middle E part;

[0035] Fig.10 for Figure 8 Enlarged view of the second groove in the middle F section;

[0036] Fig.11 This is a schematic diagram of the structure of the stator winding assembly in the initial state of the present invention;

[0037] Fig.12 for Fig.11 Schematic diagram of the cross-sectional structure of the DD stator winding assembly;

[0038] Fig.13 This is a schematic diagram of the stator housing structure in the initial state of the present invention;

[0039] Fig.14 This is a schematic diagram of the cross-sectional structure of the stator housing in the initial state of the present invention;

[0040] Fig.15 This is a schematic diagram of the bonding pin structure in the initial state of the present invention.

[0041] In the figure:

[0042] 1. Stator housing; 2. Core locating pin; 3. Adhesive pin; 4. Inner sleeve; 5. Epoxy resin glue; 6. Connecting screws; 7. Stator winding assembly; 7-1. Core locating block; 7-2. Stator armature winding; 7-3 Stator core; 8. Inner circle of stator housing outside; 9. Inner circle of stator housing inside; 10. Stator housing through hole; 11. Stator housing screw hole; 12. Core locating block outer circle; 13. Core locating block inner circle; 14. Core locating block through hole; 15. Outer circle of inner sleeve outside; 16. Inner outer circle of inner sleeve; 17. Inner circle of inner sleeve inside; 18. Flange; 19. Flange through hole; 20. First groove; 21. Second groove; 22. Glue injection hole; 23. Stator housing countersunk through hole. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0044] A structural process for preventing cracking of a stator potting glue of a limited-angle torque motor comprises the following steps:

[0045] S1. Stator in initial processing state:

[0046] The stator includes a stator assembly and epoxy resin glue 5, the stator assembly includes a stator housing 1, a stator winding assembly 7, a core positioning pin 2, a bonding pin 3, an inner sleeve 4, and a connecting screw 6. The stator winding assembly 7 includes a core positioning block 7-1 evenly distributed in the circumferential direction, a stator armature winding 7-2, and a stator core 7-3. The stator winding assembly 7 is circumferentially matched with the stator housing 1 through the core positioning block 7-1, and is placed in the stator housing 1 until the positioning surface is tightly attached. The inner circle 8 of the outer side of the stator housing is matched with the outer circle 12 of the core positioning block. The outer circle 12 and the end face of the core positioning block play a role in the stator housing. The stator body 1 has the function of circumferential and axial cooperation. The output shaft extension is at the center of the stator housing 1, which is used for the installation of shaft bearings after the stator assembly processing. The end face of the stator housing 1 is provided with a number of stator housing through holes 10 and stator housing countersunk through holes 23 that are evenly distributed, and the other end face is provided with a number of stator housing screw holes 11 that are evenly distributed. The end face of the core positioning block 7-1 is provided with a number of core positioning block through holes 14 that are evenly distributed. The core positioning pin 2 penetrates the stator housing through hole 10 and the core positioning block through hole 14, thereby realizing the circumferential position fixation and positioning of the stator winding assembly 7 in the stator housing 1.

[0047] The cross section of the inner sleeve 4 is an inverted L-shaped, with a flange 18 in the middle. The inner outer circle 9 of the stator housing cooperates with the flange 18 of the inner sleeve 4. The flange 18 is provided with a plurality of flange through holes 19. The connecting screws 6 pass through the flange through holes 19 and the stator housing screw holes 11 to connect the inner sleeve 4 to the stator housing 1. A plurality of glue injection holes 22 are arranged on the outer end face of the inner sleeve 4 to play the role of injecting epoxy resin glue 5. A circumferential first groove 20 is arranged on the other end face of the inner sleeve 4. The depth of the first groove 20 is 0.1mm to 0.25mm; the chamfered end of the bonding pin 3 passes through the stator The countersunk through hole 23 of the shell is inserted into the first groove 20 of the inner sleeve 4; the chamfer of the bonding pin 3 is a space for retaining the colloid, and the bonding pin 3 is firmly bonded to the inner sleeve 4 by using the epoxy resin glue 5; a 90° V-shaped second groove 21 is arranged on the end face of the inner sleeve 4 facing the stator armature winding 7-2, and the groove depth is 0.1mm~0.2mm, the outer circle 15 of the outer sleeve, the inner circle 16 of the inner sleeve, and the inner circle 17 of the inner sleeve are respectively matched with the outer circle 8 of the stator shell, the inner circle 13 of the core positioning block, and the inner circle 9 of the stator shell, and the inner sleeve 4 is placed in the stator shell 1.

[0048] As a preferred solution, the chamfer of the bonding pin 3 is made into a larger chamfer type, so as to accommodate more epoxy resin glue 5 and firmly bond the stator housing 1 and the inner sleeve 4.

[0049] As a preferred solution, the glue filling hole 22 of the inner sleeve 4 is set to Φ3mm~Φ4mm. If the glue filling hole 22 is too small, it is not conducive to potting and vacuuming, and bubbles may exist in the potting glue inside the stator assembly; if the glue filling hole 22 is too large, then after machining is completed, the epoxy resin glue 5 layer at the glue filling hole 22 may also crack.

[0050] S2. Assemble the stator in the initial state and add epoxy resin glue 5:

[0051] The manufactured stator winding assembly 7 is coaxially installed in the stator housing 1, the inner circle 8 of the outer side of the stator housing matches with the outer circle 12 of the core positioning block, the end face of the core positioning block 7-1 is close to the end face of the stator housing 1, and the core positioning block through hole 14 and the stator housing through hole 10 are coated with epoxy resin glue 5 and the core positioning pin 2 is inserted for positioning.

[0052] The outer circle 15 of the inner sleeve matches with the outer circle 8 of the stator housing, the inner circle 16 of the inner sleeve matches with the inner circle 13 of the core positioning block, the inner circle 17 of the inner sleeve matches with the inner circle 9 of the stator housing, the inner sleeve 4 is pressed to the bottom, and the chamfered end of the bonding pin 3 is inserted into the first groove 20 of the inner sleeve 4 through the countersunk through hole 23 of the stator housing; the flange through hole 19 of the inner sleeve 4 is aligned with the screw hole 11 of the stator housing, and the connecting screw 6 is screwed in to tighten it.

[0053] After the inner sleeve 4 is installed, one side of the countersunk through hole 23 of the stator housing faces upward, and the adhesive pin 3 is inserted into the countersunk through hole 23 of the stator housing and pressed to the bottom. The prepared epoxy resin glue 5 is added along the countersunk through hole 23 of the stator housing. Bubbles are removed during the process of adding the epoxy resin glue 5. After the countersunk through hole 23 of the stator housing is filled, it is cured as required.

[0054] Make a glue pouring mold, and fill the stator assembly with epoxy resin glue 5 through the glue pouring hole 22 on the end face of the inner sleeve 4. The glue pouring hole 22 also serves as a glue riser. The amount of glue poured is sufficient to fill the gap inside the stator assembly, and it should not be too much. Curing is carried out according to the process requirements of the epoxy resin glue 5. After curing, remove the excess glue on the surface.

[0055] S3, stator in initial state after finishing and assembly:

[0056] The center hole of the stator housing 1, one side end face of the stator housing 1 or one side end face of the inner sleeve 4 are used as the initial reference for combined processing to the required size and shape. Specifically, the processing is as follows: the center hole of the stator housing 1 is used for positioning, and the left end face of the stator assembly after potting is processed, including processing the stator housing 1, the core positioning pin 2 and the bonding pin 3, that is, processing to the required size and shape of the stator; the left end face of the stator assembly is used for positioning, and the right end face of the stator assembly, the center hole of the stator housing 1, the inner and outer circles and the end face are processed, including processing the inner sleeve 4, the connecting screw 6, and the stator housing 1, that is, the required sizes and shapes of the stator are achieved, wherein the connecting screw 6 is removed by the above machining process flow, and the inner sleeve 4, the core positioning pin 2 and the bonding pin 3 are partially removed by the above machining process flow, and the stator winding assembly 7 and the processed stator housing 1, the core positioning pin 2, the bonding pin 3, the inner sleeve 4, the epoxy resin glue 5 are formed to form the processed stator, such as Figure 2 shown.

[0057] The cross-section of the processed inner sleeve 4 in the stator is an inverted Z-shape, and its end face closes the end face of the stator armature winding 7-2 of the stator winding assembly 7, and its circumferential surface closes the circumference of the stator winding assembly 7; the inner sleeve 4 is connected to the stator housing 1 at two points, one is that the connecting screw 6 passes through the flange through hole 19 of the inner sleeve 4 and the screw hole 11 of the stator housing to connect the inner sleeve 4 to the stator housing 1; the second is that a circumferential first groove 20 is provided on the end face of the inner sleeve 4, and the bonding pin 3 passes through the countersunk through hole 23 of the stator housing, close to the bottom of the first groove 20, and the gap is filled with epoxy resin glue 5, and the connection is achieved after curing; a plurality of glue injection holes 22 are provided on one side end face of the inner sleeve 4 for injecting epoxy resin glue 5.

[0058] Working principle of the present invention:

[0059] The inner sleeve 4 is installed in the stator winding assembly 7 and the stator housing 1, and the end face and inner circumference of the stator armature winding 7-2 are covered by the inner sleeve 4. The height dimension h1 of the stator winding assembly 7 is theoretically designed, and the height dimension h2 of the inner sleeve 4 is designed, Δ=h2-h1, and Δ is taken in the range of 0.2mm~0.4mm. On the one hand, the insulation between the inner sleeve 4 and the stator armature winding 7-2 is guaranteed, and on the other hand, the thickness of the epoxy resin glue 5 filled on the end face of the stator armature winding 7-2 can be controlled to a minimum value, which is much lower than the conventional 1.5mm or more. Since the amount of glue used is significantly reduced, the stress can be significantly reduced, thereby preventing the glue layer from cracking. The colloid potted into the end face of the stator armature winding 7-2 penetrates into the gap between the winding wire packages. The 90° V-shaped second groove 21 structure on the inner sleeve 4 is conducive to the connection between the colloid and the stator armature winding 7-2 and the inner sleeve 4. At the same time, a plurality of suitable glue holes 22 are processed. The shape of the colloid at the end face after potting is complex and embedded in a distributed shape, which effectively disperses the internal stress and prevents the cracking of the glue layer. The large chamfer structure of the bonding pin 3 and the first groove 20 structure of the inner sleeve 4, assisted by the epoxy resin glue 5 bonding, tightly connect the inner sleeve 4 and the stator housing 1 as a whole, prevent the inner sleeve 4 from falling off and cracking between the stator housing 1, and ensure the implementation of the inner sleeve 4 structure.

[0060] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A structural process for preventing cracking of stator potting glue of a limited-angle torque motor, characterized in that: The following steps are involved: S1. Stator in initial processing state: The stator comprises a stator assembly and epoxy resin glue (5), wherein the stator assembly comprises a stator housing (1), a stator winding assembly (7), an iron core positioning pin (2), an adhesive pin (3), an inner sleeve (4), and a connecting screw (6), wherein the stator winding assembly (7) comprises an iron core positioning block (7-1) evenly distributed in the circumferential direction, a stator armature winding (7-2), and a stator iron core (7-3), wherein the stator winding assembly (7) is circumferentially matched with the stator housing (1) through the iron core positioning block (7-1), and the inner circle (8) of the outer side of the stator housing is connected to the iron core. The outer circle (12) of the positioning block is matched, the end face of the stator housing (1) is provided with a plurality of stator housing through holes (10) and stator housing countersunk through holes (23) that are evenly distributed, the other end face is provided with a plurality of stator housing screw holes (11) that are evenly distributed, the end face of the iron core positioning block (7-1) is provided with a plurality of iron core positioning block through holes (14) that are evenly distributed, the iron core positioning pin (2) penetrates the stator housing through hole (10) and the iron core positioning block through hole (14), and the stator winding assembly (7) is fixed and positioned in the circumferential direction in the stator housing (1); The inner sleeve (4) has an inverted L-shaped cross section and is provided with a flange (18) in the middle. The inner outer circle (9) of the stator housing matches the flange (18) of the inner sleeve (4). The flange (18) is provided with a plurality of flange through holes (19). The connecting screws (6) pass through the flange through holes (19) and the stator housing screw holes (11) to connect the inner sleeve (4) to the stator housing (1). The outer end surface of the inner sleeve (4) is provided with a plurality of glue injection holes (22). The other end surface of the inner sleeve (4) is provided with a circumferential first groove (20). The bonding pin (3 ) is inserted into the first groove (20) of the inner sleeve (4) through the countersunk through hole (23) of the stator housing; a 90° V-shaped second groove (21) is arranged on the end surface of the inner sleeve (4) facing the stator armature winding (7-2); the outer circle (15) of the inner sleeve, the inner circle (16) of the inner sleeve, and the inner circle (17) of the inner sleeve are respectively matched with the outer circle (8) of the stator housing, the inner circle (13) of the core positioning block, and the inner circle (9) of the stator housing; and the inner sleeve (4) is placed in the stator housing (1); S2. Assemble the stator in the initial state and add epoxy resin glue (5): The manufactured stator winding assembly (7) is coaxially installed in the stator housing (1), the inner circle (8) of the outer side of the stator housing matches with the outer circle (12) of the core positioning block, the end face of the core positioning block (7-1) is tightly attached to the end face of the stator housing (1), and the core positioning block through hole (14) and the stator housing through hole (10) are coated with epoxy resin glue (5) and the core positioning pin (2) is inserted for positioning; The outer circle (15) of the inner sleeve is matched with the inner circle (8) of the outer side of the stator housing, the inner circle (16) of the inner sleeve is matched with the inner circle (13) of the core positioning block, the inner circle (17) of the inner sleeve is matched with the inner circle (9) of the stator housing, the inner sleeve (4) is pressed to the bottom, the chamfered end of the bonding pin (3) is inserted into the first groove (20) of the inner sleeve (4) through the countersunk through hole (23) of the stator housing, the flange through hole (19) of the inner sleeve (4) is aligned with the screw hole (11) of the stator housing, and the connecting screw (6) is screwed in to tighten; After the inner sleeve (4) is installed, one side of the countersunk through hole (23) of the stator housing faces upward, and the bonding pin (3) is inserted into the countersunk through hole (23) of the stator housing and pressed to the bottom, and the prepared epoxy resin glue (5) is added along the countersunk through hole (23) of the stator housing. During the process of adding the epoxy resin glue (5), air bubbles are removed. After the countersunk through hole (23) of the stator housing is filled, it is cured as required; A glue injection mold is prepared, and the epoxy resin glue (5) is injected into the stator component through the glue injection hole (22) on the end surface of the inner sleeve (4), the glue injection hole (22) also serves as a glue riser, and the amount of glue injected is guaranteed to fill the gap inside the stator component. The epoxy resin glue (5) is cured according to the process requirements, and after curing, the residual glue on the surface is removed; S3, stator in initial state after finishing and assembly: The center hole of the stator housing (1), one end face of the stator housing (1) or one end face of the inner sleeve (4) are used as initial references for combined processing to achieve the required size and shape. Specifically, the processing is as follows: the center hole of the stator housing (1) is used for positioning, and the left end face of the encapsulated stator assembly is processed, including processing the stator housing (1), the core positioning pin (2) and the bonding pin (3), that is, processing to the required size and shape of the stator; the left end face of the stator assembly is used for positioning, and the right end face of the stator assembly, the center hole of the stator housing (1), and the bonding pin (3) are processed. The inner and outer circles and end faces are processed, including the inner sleeve (4), the connecting screws (6), and the stator housing (1), so as to achieve the dimensions and shapes required by the stator, wherein the connecting screws (6) are removed by processing in the above processing process, and the inner sleeve (4), the core positioning pins (2), and the bonding pins (3) are partially removed by processing in the above processing process, and the stator winding assembly (7) and the processed stator housing (1), the core positioning pins (2), the bonding pins (3), the inner sleeve (4), and the epoxy resin glue (5) form a processed stator; The cross section of the processed inner sleeve (4) in the stator is an inverted Z-shape, its end face seals the end face of the stator armature winding (7-2) of the stator winding assembly (7), and its circumferential surface seals the circumference of the stator winding assembly (7).

Images