A general positioning press-fitting die for an inner-wound rotor and a method of use

Abstract

A universal positioning and pressing mold for internally wound stators and its usage method are disclosed. The pressing mold includes: a base plate, a positioning block, a spring, a main spindle, a secondary spindle, an upper positioning mold, and a lower positioning mold. The method includes: 1) fixing the base plate on a workbench; 2) welding the positioning block to the bottom of the through hole II of the main spindle; 3) inserting the inner positioning section of the secondary spindle into the spring, and inserting it into the through hole II of the main spindle with the spring facing downwards; 4) fixing the baffle of the main spindle into the through hole I of the base plate; 5) passing the lower positioning mold sequentially through the secondary spindle and the main spindle, and fixing it on the base plate; 6) inserting the lower workpiece; 7) inserting the upper workpiece; 8) inserting the upper positioning mold through the secondary spindle and assembling it onto the upper workpiece; 9) adjusting the parameters of the pressure equipment, starting the pressure equipment, and the secondary spindle, upper positioning mold, and upper workpiece move downwards synchronously to complete the workpiece pressing. This invention is applicable to the positioning and pressing operation of stator winding cores and housings, and is not limited to the use of auxiliary press equipment.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a universal positioning and pressing mold for an inner winding stator and its usage method. Background Technology

[0002] With the continuous development of motor technology and the increasing demands for motor performance across industries, the research and application of internally wound stators have become increasingly widespread. In the process of industrial automation, the requirements for motor precision, efficiency, and reliability are constantly rising. Simultaneously, the trends of energy conservation and environmental protection are prompting research into more efficient motor structures, primarily reflected in brushless DC motors, stepper motors, and AC servo motors. To achieve stronger motor performance within a limited space, the area of ​​the wire slots is typically increased to improve slot fill factor. This limits the pressing space, leading to increased pressing difficulty. Conventional pressing methods struggle to guarantee pressing quality and consistency, and can easily result in the risk of stator scrapping.

[0003] Currently, a pressing tool is used for the internal stator pressing process. After the machine housing is preheated to a certain temperature, the stator winding core is placed vertically upwards by the operator at the guide opening (approximately C2) of the machine housing. Then, the stator winding core is pressed into the machine housing by the force of the pressing equipment. The pressing tool used in the existing technology mainly transmits the pressure of the equipment to the force-bearing surface of the stator winding core, making it difficult to achieve its positioning function. It mainly relies on manual alignment, and slight carelessness can easily cause misalignment during the pressing process, resulting in the stator winding core jamming with the machine housing and causing the stator to be scrapped. Secondly, the pressure-bearing area of ​​the stator winding core is relatively small, usually only a ring area with a width of 1-2mm. As a result, the pressing tool is usually designed to be thin, resulting in a small force-bearing area. Under large forces, the pressing tool is easily damaged, leading to the stator not being properly pressed into place and thus being scrapped. In summary, existing technologies have drawbacks such as significant human error, low operational efficiency, poor consistency, and high risk of obsolescence, while also posing personal safety hazards. Summary of the Invention

[0004] The purpose of this invention is to provide a universal positioning press-fit mold for inner winding stators and its usage method.

[0005] The technical solution adopted to achieve the technical objective of this invention is as follows: a universal positioning and pressing mold for an inner winding stator, comprising: a base plate, a positioning block, a spring, a main spindle, a secondary spindle, an upper positioning mold, and a lower positioning mold.

[0006] The bottom plate has a through hole I at the center of its surface, and a through groove on one side of the through hole I.

[0007] The main spindle has a through hole II along its axis at its center, and the diameter of the through hole II is adapted to that of the positioning block.

[0008] The bottom of the main spindle is provided with a baffle.

[0009] The baffle is adapted to the through hole I of the base plate and is installed or removed by the guiding action of the through groove.

[0010] The secondary mandrel includes an inner positioning section and an axial positioning section.

[0011] The diameter of the inner positioning section is smaller than the inner diameter of the spring.

[0012] The axial positioning section is adapted to the through hole II of the main spindle.

[0013] The upper positioning mold and the lower positioning mold are arranged at intervals, and groove I and groove II are respectively provided on opposite sides.

[0014] The groove I is used to avoid the vulnerable upper part of the workpiece.

[0015] The groove II is used to avoid the vulnerable lower part of the upper workpiece.

[0016] The groove I of the upper positioning mold is provided with a through hole III, and the diameter of the through hole III is adapted to the axial positioning section of the secondary mandrel.

[0017] The sidewall of the groove I is provided with several wire outlet slots.

[0018] The groove II of the lower positioning mold has a through hole IV at its center, and the through hole IV is adapted to the outer diameter of the main spindle.

[0019] The lower positioning mold has a positioning groove on one side opposite to the upper positioning mold for positioning the lower workpiece.

[0020] The positioning block is welded into the through hole II of the main spindle.

[0021] The baffle of the main spindle is installed in the through hole I of the base plate, and the main spindle passes through the through hole IV of the lower positioning mold.

[0022] The lower workpiece is installed on the positioning groove of the lower positioning mold.

[0023] One end of the spring is fitted onto the inner positioning section of the secondary spindle, and the other end extends into the through hole II of the main spindle to abut against the positioning block.

[0024] The upper end of the upper workpiece abuts against the upper positioning mold, and the lower end is placed inside the lower workpiece.

[0025] After the axial positioning section of the secondary mandrel passes through the upper workpiece, it extends out of the through hole III of the upper positioning mold.

[0026] Using a pressure device, the upper workpiece is pressed down from the top of the upper positioning mold, and the upper workpiece is pressed into the lower workpiece through the compression spring, thus completing the press-fitting of the workpiece.

[0027] Furthermore, the upper workpiece includes a stator winding core.

[0028] Furthermore, the stator winding core leads out from the lead-out slot of the upper positioning mold.

[0029] Furthermore, the lower workpiece includes a housing.

[0030] Furthermore, the base plate has several screw holes I on its surface.

[0031] The base plate is fixed to the workbench by screw hole I.

[0032] Furthermore, the base plate has several screw holes II on its surface.

[0033] The positioning and pressing mold also includes a handle.

[0034] The handle is mounted on the screw hole II in the base plate by mounting screw a.

[0035] Furthermore, the upper positioning mold is provided with a stop for positioning the upper workpiece.

[0036] Furthermore, the upper positioning mold and the lower positioning mold can be changed according to the actual needs of the press-fitted workpiece.

[0037] A method for press-fitting a workpiece using the above-mentioned positioning and pressing die includes the following steps:

[0038] 1) Fix the base plate on the workbench and attach the handle to the base plate.

[0039] 2) Insert the positioning block into the bottom of the through hole II of the main spindle and weld it firmly.

[0040] 3) Insert the inner positioning section of the secondary spindle into the spring, and insert it into the through hole II of the main spindle with the spring facing down.

[0041] 4) Place the baffle of the main spindle in the through groove of the base plate and fix it horizontally into the through hole I of the base plate.

[0042] 5) Pass the lower positioning mold through the secondary mandrel and the main mandrel in sequence and fix it on the base plate.

[0043] 6) Insert the lower workpiece so that the bottom of the lower workpiece is mounted on the positioning groove of the lower positioning mold.

[0044] 7) Insert the upper workpiece so that the bottom of the upper workpiece connects with the top of the lower workpiece.

[0045] 8) Pass the upper positioning mold through the secondary mandrel and assemble it on the upper workpiece, with the lower end of the upper positioning mold abutting against the upper workpiece.

[0046] 9) Adjust the parameters of the pressure equipment, start the pressure equipment, and the auxiliary mandrel, upper positioning mold and upper workpiece move down synchronously to complete the workpiece pressing.

[0047] Furthermore, the parameters of the pressure device include the pressing depth and the pressure magnitude.

[0048] The technical effects of this invention are undeniable. This invention provides a universal positioning and pressing mold for internal stators to replace traditional manual pressing and simultaneously ensure pressing quality, efficiency and consistency. It is mainly applicable to the positioning and pressing operation of stator winding cores and housings, and is not limited to the use of auxiliary pressing equipment.

[0049] This invention employs a universal positioning press-fitting mold to ensure flexible mechanical positioning during the stator press-fitting process. It enables rapid positioning, accurate and stable pressing, and facilitates rapid changeover. This method is convenient and efficient, greatly minimizing human error and ensuring the press-fitting quality and consistency of the stator winding core and housing, thereby improving product qualification rates and reducing personal safety risks to some extent. This universal positioning press-fitting mold is flexible in its application environment and can be used with hand-operated presses, cylinder presses, servo presses, and other equipment, making it suitable for enterprises with diverse product types and small batch production needs.

[0050] The press-fitting process using the universal positioning and pressing mold for inner-wound stators provided by this invention requires no manual assistance, avoiding the risk of mechanical damage. It is also more convenient and simple to operate, with accurate positioning, avoiding human error. Thus, it truly improves the pressing efficiency of inner-wound stators while ensuring pressing quality and consistency.

[0051] This invention features a novel, simple, and aesthetically pleasing structure with flexible adjustment to ensure accurate workpiece positioning. It also boasts excellent compatibility and interchangeability, enabling rapid model changeover. Furthermore, this invention meets the requirements for safe production and multi-variety, small-batch production, simultaneously ensuring the efficiency, quality, and consistency of the internal winding stator press-fitting process. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the internal winding stator press-fitting process.

[0053] Figure 2 This is a schematic diagram of the base plate; Figure 2 (a) is a top view of the base plate; Figure 2 (b) is the front view of the base plate;

[0054] Figure 3 This is a schematic diagram of the positioning block; Figure 3 (a) is a front view of the positioning block; Figure 3 (b) is a side view of the positioning block;

[0055] Figure 4 Schematic diagram of the main spindle; Figure 4 (a) Side view of the main mandrel; Figure 4 (b) is a sectional view of the main mandrel;

[0056] Figure 5 This is a schematic diagram of the secondary mandrel; Figure 5 (a) is a side view of the secondary mandrel; Figure 5 (b) is a front view of the secondary mandrel;

[0057] Figure 6 This is a schematic diagram of the upper positioning module; Figure 6 (a) is the front view of the upper positioning model; Figure 6 (b) is a cross-sectional view of the upper positioning mold;

[0058] Figure 7 This is a schematic diagram of the lower positioning mold; Figure 7 (a) is the front view of the lower positioning module; Figure 7 (b) is a cross-sectional view of the lower positioning mold;

[0059] Figure 8 Front view of the assembly of the universal positioning press-fit mold for the inner winding stator;

[0060] Figure 9 Bottom view of the assembly of the universal positioning press-fit mold for the inner winding stator;

[0061] In the figure, the components are: base plate 101, through hole I 1011, through groove 1012, screw hole I 1013, screw hole II 1014, positioning block 102, spring 103, main spindle 104, through hole II 1041, baffle 1042, secondary spindle 105, inner positioning section 1051, axial positioning section 1052, handle 106, mounting screw a 107, mounting screw b 108, upper positioning mold 109, groove I 1091, through hole III 1092, wire outlet groove 1093, lower positioning mold 110, groove II 1101, through hole IV 1102, positioning groove 1103, stator winding core 2, housing 3, pressure equipment 4, and wire outlet 5. Detailed Implementation

[0062] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0063] Example 1:

[0064] See Figures 1 to 9 A universal positioning and pressing mold for an inner winding stator includes: a base plate 101, a positioning block 102, a spring 103, a main spindle 104, a secondary spindle 105, an upper positioning mold 109, and a lower positioning mold 110.

[0065] The bottom plate 101 has a through hole I1011 at the center of its surface, and a through groove 1012 on one side of the through hole I1011.

[0066] The main spindle 104 has a through hole II1041 along its axis at its center, and the through hole II1041 is adapted to the diameter of the positioning block 102.

[0067] The bottom of the main spindle 104 is provided with a baffle 1042.

[0068] The baffle 1042 is adapted to the through hole I1011 of the base plate 101 and is installed or removed by the guiding action of the through groove 1012.

[0069] The secondary mandrel 105 includes an inner positioning section 1051 and an axial positioning section 1052.

[0070] The diameter of the inner positioning section 1051 is smaller than the inner diameter of the spring 103.

[0071] The axial positioning section 1052 is adapted to the through hole II1041 of the main spindle 104.

[0072] The upper positioning mold 109 and the lower positioning mold 110 are arranged at intervals, and grooves I1091 and II1101 are respectively provided on opposite sides.

[0073] The groove I1091 is used to avoid the vulnerable upper part of the workpiece.

[0074] The groove II1101 is used to avoid the vulnerable lower part of the upper workpiece.

[0075] The upper positioning mold 109 has a through hole III1092 at the center of the groove I1091, and the diameter of the through hole III1092 is adapted to the diameter of the axial positioning section 1052 of the secondary mandrel 105.

[0076] The sidewall of the groove I1091 is provided with several cable outlet grooves 1093.

[0077] The groove II1101 of the lower positioning mold 110 has a through hole IV1102 at its center, and the through hole IV1102 is adapted to the outer diameter of the main spindle 104.

[0078] The lower positioning mold 110 has a positioning groove 1103 on one side opposite to the upper positioning mold 109 for positioning the lower workpiece.

[0079] The positioning block 102 is welded into the through hole II1041 of the main spindle 104.

[0080] The baffle 1042 of the main spindle 104 is installed in the through hole I1011 of the base plate 101, and the main spindle 104 passes through the through hole IV1102 of the lower positioning mold 110.

[0081] The lower workpiece is installed on the positioning groove 1103 of the lower positioning mold 110.

[0082] One end of the spring 103 is fitted onto the inner positioning section 1051 of the auxiliary spindle 105, and the other end extends into the through hole II 1041 of the main spindle 104 to abut against the positioning block 102.

[0083] The upper end of the upper workpiece abuts against the upper positioning mold 109, and the lower end is placed inside the lower workpiece.

[0084] After the axial positioning section 1052 of the secondary mandrel 105 passes through the upper workpiece, it extends out of the through hole III1092 of the upper positioning mold 109.

[0085] The pressure device 4 is used to press down from the top of the upper positioning mold 109, and the upper workpiece is pressed into the lower workpiece through the compression spring 103, thus completing the press-fitting of the workpiece.

[0086] Example 2:

[0087] A universal positioning and pressing mold for an inner winding stator, the main technical contents of which are described in Embodiment 1, further wherein the upper workpiece includes a stator winding core 2.

[0088] Example 3:

[0089] A universal positioning and pressing mold for an inner winding stator, the main technical contents of which are described in any one of Embodiments 1 to 2, further wherein the lead wire 5 of the stator winding core 2 is led out from the lead wire slot 1093 of the upper positioning mold 109.

[0090] Example 4:

[0091] A universal positioning press-fitting mold for an inner winding stator, the main technical contents of which are described in any one of Embodiments 1 to 3, further wherein the lower workpiece includes a housing 3.

[0092] Example 5:

[0093] A universal positioning and pressing mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 1 to 4, further wherein the base plate 101 is provided with a plurality of screw holes I1013 on its surface.

[0094] The base plate 101 is fixed to the workbench by screw holes I1013 and mounting screws b108.

[0095] Example 6:

[0096] A universal positioning press-fit mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 1 to 5, further wherein the base plate 101 is provided with a plurality of screw holes II1014 on its surface.

[0097] The positioning and pressing mold also includes a handle 106.

[0098] The handle 106 is mounted on the screw hole II1014 of the base plate 101 by mounting screw a107.

[0099] Example 7:

[0100] A universal positioning and pressing mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 1 to 6, further wherein the upper positioning mold 109 is provided with a stop for positioning the upper workpiece.

[0101] Example 8:

[0102] A universal positioning and pressing mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 1 to 7. Furthermore, the upper positioning mold 109 and the lower positioning mold 110 can be changed according to the actual pressing requirements of the workpiece.

[0103] Example 9:

[0104] A method for press-fitting a workpiece using the positioning and pressing die described in any one of Examples 1-8 includes the following steps:

[0105] 1) Fix the base plate on the workbench and attach the handle to the base plate.

[0106] 2) Insert the positioning block into the bottom of the through hole II of the main spindle and weld it firmly.

[0107] 3) Insert the inner positioning section of the secondary spindle into the spring, and insert it into the through hole II of the main spindle with the spring facing down.

[0108] 4) Place the baffle of the main spindle in the through groove of the base plate and fix it horizontally into the through hole I of the base plate.

[0109] 5) Pass the lower positioning mold through the secondary mandrel and the main mandrel in sequence and fix it on the base plate.

[0110] 6) Insert the lower workpiece so that the bottom of the lower workpiece is mounted on the positioning groove of the lower positioning mold.

[0111] 7) Insert the upper workpiece so that the bottom of the upper workpiece connects with the top of the lower workpiece.

[0112] 8) Pass the upper positioning mold through the secondary mandrel and assemble it on the upper workpiece, with the lower end of the upper positioning mold abutting against the upper workpiece.

[0113] 9) Adjust the parameters of the pressure equipment, start the pressure equipment, and the auxiliary mandrel, upper positioning mold and upper workpiece move down synchronously to complete the workpiece pressing.

[0114] Example 10:

[0115] A universal positioning and pressing method for an internally wound stator is described in Example 9. Further, the parameters of the pressure device include pressing depth and pressure magnitude.

[0116] Example 11:

[0117] See Figures 1 to 9 A universal positioning and pressing mold for an inner winding stator includes: a base plate 101, a positioning block 102, a spring 103, a main spindle 104, a secondary spindle 105, an upper positioning mold 109, and a lower positioning mold 110.

[0118] The bottom plate 101 has a through hole I1011 at the center of its surface, and a through groove 1012 on one side of the through hole I1011.

[0119] The main spindle 104 has a through hole II1041 along its axis at its center, and the through hole II1041 is adapted to the diameter of the positioning block 102.

[0120] The bottom of the main spindle 104 is provided with a baffle 1042.

[0121] The baffle 1042 is adapted to the through hole I1011 of the base plate 101 and is installed or removed by the guiding action of the through groove 1012.

[0122] The secondary mandrel 105 includes an inner positioning section 1051 and an axial positioning section 1052.

[0123] The diameter of the inner positioning section 1051 is smaller than the inner diameter of the spring 103.

[0124] The axial positioning section 1052 is adapted to the through hole II1041 of the main spindle 104.

[0125] The axial positioning section 1052 has high requirements for surface roughness and precision.

[0126] The upper positioning mold 109 and the lower positioning mold 110 are arranged at intervals, and grooves I1091 and II1101 are respectively provided on opposite sides.

[0127] The groove I1091 is used to avoid the vulnerable upper part of the upper workpiece (such as the enameled wire at the upper end of the stator winding core).

[0128] The groove II1101 is used to avoid the vulnerable lower part of the upper workpiece (such as the enameled wire at the lower end of the stator winding core).

[0129] The upper positioning mold 109 has a through hole III1092 at the center of the groove I1091, and the diameter of the through hole III1092 is adapted to the diameter of the axial positioning section 1052 of the secondary mandrel 105.

[0130] The sidewall of the groove I1091 is provided with several cable outlet grooves 1093.

[0131] The groove II1101 of the lower positioning mold 110 has a through hole IV1102 at its center, and the through hole IV1102 is adapted to the outer diameter of the main spindle 104.

[0132] The lower positioning mold 110 has a positioning groove 1103 on one side opposite to the upper positioning mold 109 for positioning the lower workpiece.

[0133] The positioning block 102 is welded into the through hole II1041 of the main spindle 104.

[0134] The baffle 1042 of the main spindle 104 is installed in the through hole I1011 of the base plate 101, and the main spindle 104 passes through the through hole IV1102 of the lower positioning mold 110.

[0135] The lower workpiece is installed on the positioning groove 1103 of the lower positioning mold 110.

[0136] One end of the spring 103 is fitted onto the inner positioning section 1051 of the auxiliary spindle 105, and the other end extends into the through hole II 1041 of the main spindle 104 to abut against the positioning block 102.

[0137] The upper end of the upper workpiece abuts against the upper positioning mold 109, and the lower end is placed inside the lower workpiece.

[0138] After the axial positioning section 1052 of the secondary mandrel 105 passes through the upper workpiece, it extends out of the through hole III1092 of the upper positioning mold 109.

[0139] The pressure device 4 is used to press down from the top of the upper positioning mold 109, and the upper workpiece is pressed into the lower workpiece through the compression spring 103, thus completing the press-fitting of the workpiece.

[0140] Example 12:

[0141] A universal positioning and pressing mold for an inner winding stator, the main technical contents of which are described in Embodiment 11, further wherein the upper workpiece includes a stator winding core 2.

[0142] Example 13:

[0143] A universal positioning and pressing mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 11 to 12, further wherein the outgoing wire 5 of the stator winding core 2 (such as the three-phase outgoing wire of the stator winding core) is led out from the outgoing wire slot 1093 of the upper positioning mold 109.

[0144] Example 14:

[0145] A universal positioning press-fitting mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 11 to 13, further wherein the lower workpiece includes a housing 3.

[0146] Example 15:

[0147] A universal positioning press-fit mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 11 to 14, further wherein the base plate 101 is provided with four screw holes I1013 on its surface.

[0148] The base plate 101 is fixed to the workbench by four mounting screws b108 through screw holes I1013.

[0149] Example 16:

[0150] A universal positioning press-fit mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 11 to 15, further wherein the base plate 101 is provided with four screw holes II1014 on its surface.

[0151] The positioning and pressing mold also includes two handles 106.

[0152] The handle 106 is mounted on the screw hole II1014 of the base plate 101 by four mounting screws a107.

[0153] Example 17:

[0154] A universal positioning press-fitting mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 11 to 16, further wherein the upper positioning mold 109 is provided with a stop for positioning the upper workpiece.

[0155] Example 18:

[0156] A universal positioning and pressing mold for an inner winding stator, the main technical contents of which are described in any one of embodiments 11 to 17. Furthermore, the upper positioning mold 109 and the lower positioning mold 110 can be changed according to the actual pressing requirements of the workpiece.

[0157] Example 19:

[0158] A method for press-fitting a workpiece using the positioning and pressing die described in any one of Examples 11-18 includes the following steps:

[0159] 1) Fix the base plate on the workbench and attach the handle to the base plate.

[0160] 2) Insert the positioning block into the bottom of the through hole II of the main spindle and weld it firmly.

[0161] 3) Insert the inner positioning section of the secondary spindle into the spring, and insert it into the through hole II of the main spindle with the spring facing down.

[0162] 4) Place the baffle of the main spindle in the through groove of the base plate and fix it horizontally into the through hole I of the base plate.

[0163] 5) Pass the lower positioning mold through the secondary mandrel and the main mandrel in sequence and fix it on the base plate.

[0164] 6) Insert the lower workpiece so that the bottom of the lower workpiece is mounted on the positioning groove of the lower positioning mold.

[0165] 7) Insert the upper workpiece so that the bottom of the upper workpiece connects with the top of the lower workpiece.

[0166] 8) Pass the upper positioning mold through the secondary mandrel and assemble it on the upper workpiece, with the lower end of the upper positioning mold abutting against the upper workpiece.

[0167] 9) Adjust the parameters of the pressure equipment, start the pressure equipment, and the auxiliary mandrel, upper positioning mold and upper workpiece move down synchronously to complete the workpiece pressing.

[0168] Example 20:

[0169] A universal positioning and pressing method for an internally wound stator is described in Example 19. Further, the parameters of the pressure device include pressing depth and pressure magnitude.

[0170] Example 21:

[0171] See Figures 1 to 9 A universal positioning and pressing mold for an inner-wound stator, and its usage method, the main technical contents of which include:

[0172] A universal positioning and pressing mold for internally wound stators and its usage method are disclosed. This mold is primarily applicable to the rapid positioning and pressing operations of stator winding cores onto the housing, and also meets the requirements for rapid model changeover. The universal positioning and pressing mold for internally wound stators includes a base plate 101, a positioning block 102, a spring 103, a main spindle 104, a secondary spindle 105, two handles 106, four mounting screws a107, four mounting screws b108, an upper positioning mold 109, and a lower positioning mold 110.

[0173] 1. The general positioning and pressing mold for the inner winding stator is as follows:

[0174] 1) Base plate 101: It serves as a mother plate placed on the workbench, providing positioning support and connection for other components; four through holes (including countersunk holes) are evenly drilled on its surface to accommodate mounting screws b108 for fastening to the workbench; four threaded holes are evenly drilled on its surface to accommodate mounting screws a107 for fastening to the two handles 106; one through groove (arc + flared shape) is provided, with the arc part matching the arc surface of the main spindle 104, and the flared shape providing guidance for the horizontal installation or disassembly of the main spindle 104.

[0175] 2) Positioning block 102: It is cylindrical, inserted into the inner hole of the main spindle 104 for positioning, and then welded closed.

[0176] 3) Spring 103: A common standard part, installed inside the main spindle 104, used to support the elastic movement of the secondary spindle 105.

[0177] 4) Main spindle 104: The whole is "T" shaped, with high outer circle precision, mainly used for lower positioning with the housing; the step is waist-shaped, and its arc surface is mainly used to cooperate with the arc surface of the through groove of the base plate 101 for positioning. Its opposite side dimension is slightly smaller than the minimum width of the trumpet shape of the base plate 101, mainly to facilitate the horizontal installation or removal of the main spindle 104; the internal through hole has high requirements for roughness and precision, mainly used for axial elastic positioning with the secondary spindle 105.

[0178] 5) Sub-spindle 105: It is cylindrical and divided into two sections. The smaller diameter section is slightly smaller than the inner diameter of the spring 103, mainly to be able to be embedded in the spring 103 for positioning. The larger diameter section has higher requirements for roughness and precision, and is mainly used for axial elastic positioning with the inner hole of the main spindle 104.

[0179] 6) Handle 106: This is a common standard part, which facilitates the holding and handling of the press mold as a whole, and is fastened to the base plate 101 with the mounting screw a107.

[0180] 7) Mounting screws a107 and b108: These are common standard parts, used for mounting and fixing.

[0181] 8) Upper positioning mold 109: Primarily "hat-shaped," used for positioning the upper workpiece (such as the stator winding core). A through hole is drilled in the center for axial positioning with the auxiliary mandrel 105. A groove is machined at the bottom to avoid vulnerable parts of the workpiece (such as the enameled wire at the upper end of the stator winding core). Three grooves are milled on the side for vulnerable parts of the workpiece (such as the three-phase leads of the stator winding core) to be led out. A stop is machined at the bottom for positioning with the workpiece (such as the load-bearing ring surface of the stator winding core).

[0182] 9) Lower positioning mold 110: Used for positioning with the lower workpiece (such as the machine housing). A through hole is drilled in the center for axial positioning with the main spindle 104. The upper part is machined with a pin groove to avoid vulnerable parts of the workpiece (such as the enameled wire at the lower end of the stator winding core). The top part is machined with a pin stop for positioning with the workpiece (such as the load-bearing ring surface of the machine housing).

[0183] 2. The method of use for pressing the inner winding stator is as follows:

[0184] 1) Place the base plate 101 stably on the worktable of the hand-operated press, cylinder press or servo press, and tighten it with 4 mounting screws b108;

[0185] 2) Secure the two handles 106 to the base plate 101 using the four mounting screws a107;

[0186] 3) Insert the positioning block 102 into the bottom inner hole of the main spindle 104 for positioning (leaving an appropriate welding depth), and weld it firmly from the bottom end;

[0187] 4) Insert the small-diameter end of the secondary spindle 105 into the spring 103 for positioning, and then insert the whole assembly into the main spindle 104 with the spring 103 facing down.

[0188] 5) Place the assembly components (hereinafter referred to as "center positioning mold") from steps 3) to 4) above in a suitable position on the base plate 101 and place them stably;

[0189] 6) Position the lower positioning mold 110 by passing it from top to bottom through the auxiliary mandrel 105 and engaging it with the main mandrel 104;

[0190] 7) Insert the lower workpiece (such as the machine housing) from top to bottom so that the lower part is positioned with the stop of the lower positioning mold 110. Insert the upper workpiece (such as the stator winding core) from top to bottom and connect it with the upper part of the lower workpiece (such as the machine housing).

[0191] 8) Assemble and position the upper positioning mold 109 with the secondary mandrel 105 from top to bottom, so that the lower part is positioned with the upper workpiece (such as the stator winding core) stop, and at the same time, the vulnerable parts of the upper workpiece (such as the three-phase lead wires of the stator winding core) are led out from the opening slot.

[0192] 9) Assemble the whole assembly in steps 5) to 8) above with the opposite straight side of the waist-shaped step of the main spindle 104 facing the through groove of the base plate 101. Then rotate the main spindle 104 clockwise by 90° so that its two arc surfaces match.

[0193] 10) Adjust the parameters of the pressure equipment according to the technical requirements. Under safe environmental conditions, start the pressure equipment, that is, the pressure head moves downward. The auxiliary mandrel 105, the upper positioning mold 109 and the upper workpiece (such as the stator winding core) move downward in sync, and the stator press-fitting is completed.

[0194] 3. Other instructions

[0195] The middle positioning mold (mentioned in items 2 and 5 above) is a general-purpose mold, and the upper positioning mold 109 and the lower positioning mold 110 can be quickly changed according to the actual needs of the press-fitted workpiece (inner winding stator).

[0196] The use of this universal positioning and pressing die for internally wound stators eliminates the need for manual assistance during the pressing process, avoiding the risk of mechanical damage. It also makes operation more convenient and simple, and ensures accurate positioning, avoiding human error. This truly improves the pressing efficiency of internally wound stators while ensuring pressing quality and consistency.

Claims

1. A universal positioning press-fit mold for an inner winding stator, characterized in that, include: Base plate (101), positioning block (102), spring (103), main spindle (104), auxiliary spindle (105), upper positioning mold (109), lower positioning mold (110); The bottom plate (101) has a through hole I (1011) at the center of its surface, and a through groove (1012) is provided on one side of the through hole I (1011). The main spindle (104) has a through hole II (1041) along its axis at its center, and the diameter of the through hole II (1041) is adapted to that of the positioning block (102). The bottom of the main spindle (104) is provided with a baffle (1042); The baffle (1042) is adapted to the through hole I (1011) of the base plate (101) and is installed or removed by the guiding action of the through groove (1012); The secondary mandrel (105) includes an inner positioning section (1051) and an axial positioning section (1052); The diameter of the inner positioning section (1051) is smaller than the inner diameter of the spring (103); The axial positioning section (1052) is adapted to the through hole II (1041) of the main spindle (104); The upper positioning mold (109) and the lower positioning mold (110) are arranged at intervals, and groove I (1091) and groove II (1101) are respectively provided on opposite sides; The groove I (1091) is used to avoid the vulnerable upper part of the upper workpiece; The groove II (1101) is used to avoid the vulnerable lower part of the upper workpiece; The upper positioning mold (109) has a through hole III (1092) at the center of the groove I (1091), and the diameter of the through hole III (1092) is adapted to the diameter of the axial positioning section (1052) of the secondary mandrel (105). The sidewall of the groove I (1091) is provided with several wire outlet grooves (1093); The groove II (1101) of the lower positioning mold (110) is provided with a through hole IV (1102) at its center, and the through hole IV (1102) is adapted to the outer diameter of the main spindle (104); The lower positioning mold (110) has a positioning groove (1103) on one side opposite to the upper positioning mold (109) for positioning the lower workpiece; The positioning block (102) is welded into the through hole II (1041) of the main spindle (104); The baffle (1042) of the main spindle (104) is installed in the through hole I (1011) of the base plate (101), and the main spindle (104) passes through the through hole IV (1102) of the lower positioning mold (110). The lower workpiece is installed on the positioning groove (1103) of the lower positioning mold (110); One end of the spring (103) is fitted onto the inner positioning section (1051) of the auxiliary spindle (105), and the other end extends into the through hole II (1041) of the main spindle (104) to abut against the positioning block (102); The upper end of the upper workpiece abuts against the upper positioning mold (109), and the lower end is placed inside the lower workpiece; After the axial positioning section (1052) of the secondary mandrel (105) passes through the upper workpiece, it extends out of the through hole III (1092) of the upper positioning mold (109); Using a pressure device (4), the upper workpiece is pressed down from the top of the upper positioning mold (109) and the lower workpiece is pressed in through the compression spring (103), thus completing the press-fitting of the workpiece.

2. The universal positioning press-fitting mold for an inner winding stator according to claim 1, characterized in that, The upper workpiece includes the stator winding core (2).

3. The universal positioning press-fitting mold for an inner winding stator according to claim 2, characterized in that, The stator winding core (2) leads out the lead wire (5) from the lead wire slot (1093) of the upper positioning mold (109).

4. The universal positioning press-fitting mold for an inner winding stator according to claim 1, characterized in that, The lower workpiece includes a housing (3).

5. The universal positioning press-fitting mold for an inner winding stator according to claim 1, characterized in that, The base plate (101) has several screw holes I (1013) on its surface; The screw hole I (1013) of the base plate (101) is fixed to the workbench by mounting screw b (108).

6. The universal positioning press-fitting mold for an inner winding stator according to claim 1, characterized in that, The base plate (101) has several screw holes II (1014) on its surface; The positioning and pressing mold also includes a handle (106); The handle (106) is mounted on the screw hole II (1014) of the base plate (101) by mounting screw a (107).

7. The universal positioning press-fitting mold for an inner winding stator according to claim 1, characterized in that, The upper positioning mold (109) is provided with a stop for positioning the upper workpiece.

8. The universal positioning press-fit mold for an inner winding stator according to claim 1, characterized in that, The upper positioning mold (109) and lower positioning mold (110) can be changed according to the actual needs of the press-fitted workpiece.

9. A method for press-fitting a workpiece using the positioning and pressing die according to any one of claims 1-8, characterized in that, Includes the following steps: 1) Fix the base plate to the workbench and attach the handle to the base plate; 2) Insert the positioning block into the bottom of the through hole II of the main spindle and weld it securely; 3) Insert the inner positioning section of the auxiliary mandrel into the spring, and insert it into the through hole II of the main mandrel with the spring facing down; 4) Place the baffle of the main spindle in the through groove of the base plate and horizontally insert it into the through hole I of the base plate for fixation; 5) Pass the lower positioning mold through the secondary mandrel and the main mandrel in sequence, and fix it on the base plate; 6) Insert the lower workpiece so that the bottom of the lower workpiece is mounted on the positioning groove of the lower positioning mold; 7) Insert the upper workpiece so that the bottom of the upper workpiece connects with the top of the lower workpiece; 8) Pass the upper positioning mold through the secondary mandrel and assemble it on the upper workpiece, with the lower end of the upper positioning mold abutting against the upper workpiece; 9) Adjust the parameters of the pressure equipment, start the pressure equipment, and the auxiliary mandrel, upper positioning mold and upper workpiece move down synchronously to complete the workpiece pressing.

10. A method for press-fitting a workpiece using the positioning and pressing mold according to claim 9, characterized in that, The parameters of the pressure device include the pressing depth and the pressure magnitude.

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