A hollow motor winding cup shaping tool

Abstract

The present invention provides a hollow motor winding cup shaping tool to solve the problems of existing shaping methods such as difficulty in ensuring winding roundness, large dimensional discreteness, and insufficient control over winding shape and precision. The tool comprises a cup barrel, a tapered rod, a cover plate, and a plurality of wedge blocks. The cup barrel is cylindrical, open at the upper end, and a first through hole is coaxially arranged on the bottom plate at the lower end. The plurality of wedge blocks are assembled to form a shaping structure. A space for placing the winding cup to be shaped is reserved between the outer wall of the shaping structure and the inner wall of the cup barrel. The cover plate is mounted on the upper end of the cup barrel and is coaxially provided with a second through hole. The tapered rod comprises a first rod body, a second rod body, and a third rod body coaxially connected in sequence from top to bottom. The first rod body is cylindrical and fits in the second through hole. The second rod body is truncated cone-shaped and fits in the truncated cone-shaped hole. The third rod body is cylindrical and fits in the first through hole. The large end diameter of the second rod body is equal to the diameter of the first rod body, and the small end diameter is larger than the diameter of the third rod body. A stopper is formed between the second and third rod bodies.

Description

Technical Field

[0001] The invention belongs to the technical field of hollow cup motors, and in particular relates to a hollow motor winding cup shaping tool. Background Art

[0002] Coreless motors feature low moment of inertia, fast response, and a compact design. Their performance depends significantly on the manufacturing process of their winding cups. Controlling the winding shape of the cups during coreless motor production significantly impacts motor assembly, performance, and product consistency. Increasing the winding slot fill factor while maintaining the same winding wall thickness and precisely controlling the cup shape are crucial for improving motor performance. Accurately controlling winding dimensions reduces the motor's air gap, prevents bore scraping, and increases power density. Therefore, shaping the cups is essential during coreless motor production.

[0003] At present, the hollow motor winding cup is generally shaped by rolling. However, the roundness of the winding formed by this method is difficult to guarantee, the size is highly discrete, and the control over the winding shape and precision is insufficient. During winding assembly, a large amount of filling glue needs to be filled between the iron core and the winding cup, occupying the effective air gap of the motor. As a result, the motor performance cannot be optimized and product consistency cannot be guaranteed.

[0004] In view of this, the present invention believes that it is necessary to explore a hollow motor winding cup shaping tool that can effectively improve the winding size accuracy and efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problems of the existing shaping method, such as difficulty in ensuring the roundness of the winding, large dimensional discreteness, and insufficient control over the winding shape and precision, and to provide a hollow motor winding cup shaping tool.

[0006] To achieve the above objectives, the technical solutions provided by the present invention are:

[0007] A hollow motor winding cup shaping tool, which is special in that it includes a cup barrel, a cone rod, a cover plate and multiple wedge blocks;

[0008] The cup barrel is cylindrical, with an open upper end and a first through hole coaxially arranged on the bottom plate of the lower end;

[0009] The cover plate is mounted on the upper end of the cup barrel, and a second through hole is provided on the cover plate coaxially with the first through hole;

[0010] The plurality of wedge-shaped blocks are sequentially arranged in the cup barrel along the circumferential direction to form a shaping structure, and a shaping hole is coaxially left in the middle thereof;

[0011] A space for placing the winding cup to be shaped is reserved between the outer wall of the shaping structure and the inner wall of the cup tube;

[0012] The tapered rod comprises, from top to bottom, a first rod, a second rod, and a third rod coaxially connected in sequence; the first rod is cylindrical and adapted to the radial size of the second through hole; the second rod is truncated cone-shaped; the third rod is cylindrical and adapted to the radial size of the first through hole; the diameter of the large end of the second rod is equal to that of the first rod, and the diameter of the small end is larger than that of the third rod; a stopper is formed between the second and third rods;

[0013] The roughness of the inner wall of the cup barrel, the inner wall of the wedge block, the outer wall of the wedge block, and the wall of the tapered rod is less than Ra1.6;

[0014] The inner diameter of the cup barrel is 0.1-0.2 mm smaller than the target outer diameter of the winding cup;

[0015] The outer diameter of the wedge block is 0.1-0.2 mm larger than the target inner diameter of the winding cup.

[0016] The coaxiality of the cup tube, cover plate, cone rod, first through hole, second through hole and wedge block is less than ;

[0017] The cylindricality of the cup is less than ;

[0018] The conical rod passes through the second through hole of the bottom plate at the lower end of the cup barrel and the first through hole of the cover plate to ensure the coaxiality of the conical rod and the cup barrel; during shaping, the second rod body and the third rod body of the conical rod pass through the second through hole and are inserted into the shaping hole in the middle of the shaping structure; when the conical rod is subjected to a downward force, multiple wedge blocks can be gradually and synchronously expanded outward, so that the space size for placing the winding cup to be shaped is gradually reduced; when the limit platform of the conical rod is pressed against the bottom plate at the lower end of the cup barrel, the shaping structure is deformed into a structure coaxially arranged in the cup barrel, with a cylindrical outer shape and an inverted frustum-shaped hole inside. At this time, there is a gap between adjacent wedge blocks, and the space size for placing the winding cup to be shaped can make the winding cup of the hollow motor to be shaped meet the shaping requirements.

[0019] Furthermore, the inner wall of the upper end of the cup barrel is provided with a step along the circumferential direction, and the upper end surface is provided with a plurality of mounting holes along the circumferential direction;

[0020] The cover plate includes a main body and a support body;

[0021] The main body is a circular plate, the outer diameter of which is equal to the outer diameter of the cup barrel, and the second through hole is coaxially arranged in the middle thereof; a mounting through hole is arranged on the main body at a position corresponding to the mounting hole;

[0022] The support body is an annular protrusion coaxially arranged at the bottom of the main body, and the annular protrusion is adapted to the step at the upper end of the cup barrel;

[0023] The locking screws are used to mount the cover plate on the cup barrel through the mounting through holes and the mounting holes.

[0024] Furthermore, the cross section of the wedge-shaped block is fan-shaped;

[0025] Multiple wedge blocks are made by dividing a structure with a frustum-shaped hole inside and a cylindrical outer portion evenly along the circumference, and reducing the sector angle, for example, by 1-2 degrees; this is to ensure that the wedge blocks can be smoothly installed into the inner circle of the winding cup of the hollow motor to be shaped before the winding cup is shaped.

[0026] Furthermore, there are six wedge blocks, and the sector angle of each wedge block is 59°.

[0027] Furthermore, in order to ensure minimal deformation during extrusion, the entire shaping tooling is made of 2Cr13, which has a higher hardness.

[0028] In addition, the present invention also provides a method for shaping the winding using the hollow motor winding cup shaping tool, which is special in that it includes the following steps:

[0029] 1) placing the hollow motor winding cup to be shaped coaxially in the cup barrel;

[0030] 2) Place multiple wedge-shaped blocks into the winding cup along the circumferential direction and assemble them into a shaped structure;

[0031] 3) Install the cover on the upper end of the cup tube;

[0032] 4) Insert the tapered rod through the second through hole of the cover plate into the truncated cone-shaped hole of the shaping structure, and apply external force to press down until the limit platform of the tapered rod touches the bottom plate of the lower end of the cup tube. At this time, the winding cup of the hollow motor to be shaped is in place;

[0033] During this process, the wedge-shaped structure is expanded as the cone rod is pressed downward, squeezing the hollow motor winding cup and shaping the winding until the cone rod limiter touches the bottom plate of the cup barrel (at this time, the third rod of the cone rod fits into the first through hole of the cup barrel, and the stepped surface of the third and second rods happens to contact the upper surface of the bottom plate of the cup barrel), and the shaping is in place;

[0034] 5) Heat the cup barrel to ensure that the hollow motor winding cup is solidified after shaping;

[0035] 6) Remove the cover from the upper end of the cup tube;

[0036] 7) Push the cone rod out through the first through hole of the bottom plate at the lower end of the cup tube and remove the cone rod;

[0037] 8) After the wedge structure is loosened, remove each wedge;

[0038] 9) Take out the hollow motor winding cup after shaping to complete the shaping operation.

[0039] Furthermore, the method for making the hollow motor winding cup to be shaped in step 1) is as follows:

[0040] S1. Winding the winding sheets one by one

[0041] According to the technical indicators of a single winding sheet, self-adhesive wire is used to tightly wind it on the winding tooling, and after winding, it is heated and solidified to obtain a diamond-shaped winding sheet;

[0042] According to the above method, a plurality of winding sheets are wound;

[0043] S2. Preparation of hollow motor winding cup to be shaped

[0044] Select the appropriate number of winding sheets according to the size requirements of the hollow motor winding cup;

[0045] The selected winding sheets are stacked in sequence, connected and solidified in an offset manner, that is, all the winding sheets are stacked in sequence along the same symmetry axis, and the other symmetry axes of adjacent winding sheets are spaced a distance apart;

[0046] Use a cylindrical rod to initially roll the spliced ​​winding sheets into a round shape to form the hollow motor winding cup to be shaped.

[0047] In addition, the present invention also provides a design method for the hollow motor winding cup shaping tooling, which is characterized in that the design and processing are in accordance with the following requirements:

[0048] Determine the size of the tapered rod;

[0049] According to the target outer diameter of the hollow motor winding cup, the inner diameter of the cup barrel is determined, and the inner diameter is 0.1-0.2mm smaller than the target outer diameter; according to the size of the tapered rod, a first through hole is opened on the bottom plate of the lower end of the cup barrel;

[0050] According to the size of the cone rod, a second through hole is opened on the cover plate;

[0051] The outer diameter of the reshaped structure is determined based on the target inner diameter of the hollow motor winding cup, which is 0.1-0.2mm larger than the target inner diameter. The size of the inverted frustum-shaped hole inside the reshaped structure is determined based on the size of the tapered rod. The reshaped structure is then divided into multiple pieces along the circumference, and the sector angle of each piece is reduced so that all wedge-shaped pieces can fit into the unreshaped winding cup. The degree of reduction depends on the initial rolled winding cup. If the initial rolled winding cup is relatively regular, the degree of reduction can be less. If the initial rolled winding cup has a poor shape and a thicker wall, the degree of reduction needs to be greater to meet the placement requirements.

[0052] During the above design and processing, it is necessary to ensure that the roughness of the inner wall of the cup barrel, the inner wall of the wedge block, the outer wall of the wedge block, and the wall of the tapered rod is less than Ra1.6; the coaxiality of the cup barrel, the cover plate, the tapered rod, the first through hole, the second through hole, and the wedge block is less than The cylindricality of the cup tube is less than .

[0053] The advantages of the present invention are:

[0054] 1. The present invention provides a hollow motor winding cup shaping tool that can effectively improve the roundness of the winding cup and the coaxiality of the inner and outer circles of the winding cup. The shaping structure and the cup barrel are precisely designed according to the shaping target, and the overall roundness of the hollow motor winding cup is ensured by the cooperation between the outer circle of the shaping structure and the inner circle of the cup barrel; at the same time, the coaxiality of the cone rod and the cup barrel is ensured by the radial joint limitation of the second through hole at the bottom end of the cup barrel and the first through hole of the cover plate, thereby ensuring the coaxiality of the inner and outer circles of the hollow motor winding cup; the overall cylindricity of the winding cup is ensured to be within 0.1mm, and the coaxiality of the inner and outer circles is less than φ0.05mm. The winding roundness and wall thickness can be precisely controlled, and the winding cup wall thickness control accuracy is no more than 0.05mm, thereby improving the consistency and power density of the hollow motor winding cup.

[0055] 2. The present invention can accurately control the inner diameter, outer diameter and roundness of the winding cup through the precise design and processing of the shaping tooling, ensuring small size discreteness.

[0056] 3. The present invention ensures that the winding will not be over-shaped and cause insulation damage to the enameled wire through the limiting design of the cone rod and the cup barrel.

[0057] 4. The present invention has an ingenious design, a simple and clear structure, and is easy to disassemble and use. The design of the second through hole in the bottom plate at the lower end of the cup barrel not only ensures coaxiality with the first through hole in the cover plate, but also facilitates demoulding after shaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 This is a schematic structural diagram of the hollow motor winding cup shaping tooling of the present invention;

[0059] Figure 2 for Figure 1 AA cross-sectional view and enlarged view; among them, (a) is Figure 1 AA cross-section of (b), the enlarged view of point F in (a);

[0060] Figure 3 This is a schematic diagram of the structure of the cup barrel in the hollow motor winding cup shaping tooling of the present invention (unit: mm);

[0061] Figure 4 Schematic diagram of the structure of the wedge block in the hollow motor winding cup shaping tool of the present invention; wherein (a) is a top view, (b) is a BB cross-sectional view of (a), and (c) is an axonometric view (unit: mm);

[0062] Figure 5This is a schematic diagram of the structure of the tapered rod in the hollow motor winding cup shaping tooling of the present invention (unit: mm);

[0063] Figure 6 This is a structural diagram of the cover plate in the hollow motor winding cup shaping tooling of the present invention (unit: mm);

[0064] Figure 7 The dimensions of the hollow motor winding cup in the embodiment (unit: mm);

[0065] Figure 8 The following are the outline requirements and actual pictures of a single winding sheet in the embodiment; (a) is the dimensional requirements drawing, and (b) is the actual picture (unit: mm);

[0066] Figure 9 This is a diagram of the winding sheet splicing of an embodiment;

[0067] Figure 10 This is the effect diagram of shaping the hollow motor winding cup using the existing rolling method;

[0068] Figure 11 This is a diagram showing the effect of using the tooling of the present invention to shape the winding cup of a hollow motor;

[0069] The reference numerals are as follows:

[0070] 1-cover plate; 2-locking screw; 3-cup tube; 4-wedge block; 5-cone rod; 6-hollow motor winding cup; 7-first through hole. DETAILED DESCRIPTION

[0071] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments:

[0072] like Figure 1-2 As shown, the hollow motor winding cup shaping tooling includes a cup tube, a cone rod, a cover plate and six wedge blocks.

[0073] like Figure 3 As shown, the cup barrel is cylindrical, with an open upper end and a first through hole coaxially provided on the bottom plate of the lower end; a step is provided on the inner wall of the upper end of the cup barrel along the circumferential direction, and four mounting holes are provided on the upper end surface along the circumferential direction;

[0074] like Figure 6 As shown, the cover plate includes a main body and a support body; the main body is a circular plate, the outer diameter of which is equal to the outer diameter of the cup barrel, and a second through hole is coaxially arranged in the middle; mounting through holes are arranged at positions corresponding to the four mounting holes on the main body; the support body is an annular protrusion coaxially arranged at the bottom of the main body, and the annular protrusion is adapted to the step at the upper end of the cup barrel; the locking screw installs the cover plate on the upper end of the cup barrel through the mounting through hole and the mounting hole.

[0075] like Figure 4As shown, the six wedges are made by dividing a cylindrical structure with a truncated cone hole inside and a cylindrical outer portion evenly along the circumference, reducing the sector angle by 1°, meaning that each wedge has a sector angle of 59°. The wedges are sequentially arranged circumferentially within the cup barrel to form a shaped structure, with a coaxial shaping hole at the center.

[0076] like Figure 5 As shown, the tapered rod comprises a first rod body, a second rod body, and a third rod body coaxially connected in sequence from top to bottom; the first rod body is cylindrical and adapted to the radial size of the second through hole; the second rod body is truncated cone-shaped; the third rod body is cylindrical and adapted to the radial size of the first through hole; the diameter of the large end of the second rod body is equal to the diameter of the first rod body, and the diameter of the small end is larger than the diameter of the third rod body; a stopper is formed between the second and third rod bodies;

[0077] The conical rod passes through the second through hole of the bottom plate at the lower end of the cup barrel and the first through hole of the cover plate to ensure the coaxiality of the conical rod and the cup barrel; during shaping, the second rod body and the third rod body of the conical rod pass through the second through hole and are inserted into the shaping hole in the middle of the shaping structure; when the conical rod is subjected to a downward force, multiple wedge blocks can be gradually and synchronously expanded outward, so that the space size for placing the winding cup to be shaped is gradually reduced; when the limit platform of the conical rod is pressed against the bottom plate at the lower end of the cup barrel, the shaping structure is deformed into a structure coaxially arranged in the cup barrel, with a cylindrical outer shape and an inverted frustum-shaped hole inside. At this time, there is a gap between adjacent wedge blocks, and the space size for placing the winding cup to be shaped can make the winding cup of the hollow motor to be shaped meet the shaping requirements.

[0078] The hollow motor winding cup shaping tooling is made of a material with relatively high hardness to ensure minimal deformation during extrusion. It is designed and processed according to the following requirements:

[0079] Determine the size of the tapered rod, such as Figure 5 As shown in;

[0080] According to the shaping target of hollow motor winding cup (such as Figure 7 As shown in the figure, the inner diameter of the cup is determined. The inner diameter is smaller than the target outer diameter. Since the winding has a certain elasticity, the inner diameter of the cup is designed to be slightly smaller than the outer diameter of the target hollow motor winding cup to ensure that the outer diameter meets the requirements after the winding rebounds. According to the size of the tapered rod, a first through hole is opened on the bottom plate of the lower end of the cup. The specific dimensions are as follows: Figure 3 As shown in;

[0081] According to the size of the cone rod, a second through hole is opened on the cover plate, such as Figure 6 As shown;

[0082] According to the target inner diameter of the hollow motor winding cup, the outer diameter of the shaping structure is determined; according to the size of the tapered rod, the size of the inverted frustum-shaped hole inside the shaping structure is determined; then the shaping structure is divided into 6 pieces along the circumference, and the sector angle of each piece is reduced by 1°. The specific size is as follows Figure 4 As shown, it can be seen that the angle of the wedge block is appropriately smaller than the average angle of the circumference. For example, in this solution, 6 wedge blocks are used, and the angle of each block is 1° smaller than the average angle of the circumference of 60°, that is, 59°. This is mainly to ensure that the wedge block can be smoothly installed in the inner circle of the hollow cup winding before the winding cup is shaped. Then, under the downward pressure of the tapered rod, it gradually expands into a structure coaxially arranged in the cup tube, with a cylindrical outer shape and an inverted frustum-shaped hole inside.

[0083] During the above design and processing, it is necessary to ensure that the roughness of the inner wall of the cup barrel, the inner wall of the wedge block, the outer wall of the wedge block, and the wall of the tapered rod is Ra1.6; the coaxiality of the cup barrel, the cover plate, the tapered rod, the first through hole, and the second through hole is ; The cylindricity of the cup tube is , thereby ensuring the coaxiality and cylindricity of the inner and outer circles of the hollow motor winding cup.

[0084] The following describes in detail the shaping process using the shaping tool of the present invention, taking the production process of a certain type of slotless brushless motor winding cup as an example, which includes the following steps:

[0085] 1) Prefabricated hollow motor winding cup to be shaped

[0086] 1.1 According to the technical indicators of a single winding sheet, such as Figure 8 As shown in (a), the self-adhesive wire is tightly wound on the winding tool. After the winding is completed, the temperature is increased and solidified to obtain a diamond-shaped winding sheet. The actual object is as shown in Figure 8 As shown in (b);

[0087] According to the above method, a plurality of winding sheets are wound one by one;

[0088] 1.2 Preparation of hollow motor winding cup to be shaped

[0089] According to the hollow motor winding cup size requirements, such as Figure 4 As shown, 12 winding sheets are selected;

[0090] Place the 12 winding sheets in Figure 9 The positional relationship shown is staggered and stacked in sequence, connected and solidified, and a cylindrical iron rod is used to preliminarily roll the spliced ​​winding sheets to form a hollow motor winding cup to be shaped.

[0091] 2) placing the hollow motor winding cup to be shaped obtained in step 1) coaxially in the cup barrel of the shaping tool;

[0092] 3) Place six wedge-shaped blocks into the winding cup along the circumferential direction to assemble into a shaped structure;

[0093] 4) Install the cover on the upper end of the cup barrel with the locking screws;

[0094] 5) Insert the tapered rod through the second through hole of the cover plate into the truncated cone-shaped hole of the shaping structure. Use a press to press down to ensure that the third rod of the tapered rod is inserted into the first through hole of the bottom plate at the lower end of the cup tube until the limit plate of the tapered rod is pressed against the bottom plate at the lower end of the cup tube. At this time, the shaping of the hollow motor winding cup is in place.

[0095] 6) Heat the cup barrel to ensure that the hollow motor winding cup is solidified after shaping;

[0096] 7) Remove the cover from the upper end of the cup tube;

[0097] 8) Use a small rod to push the cone rod out of the cup tube through the first through hole of the bottom plate at the lower end of the cup tube and remove it;

[0098] 9) After the wedge structure is loosened, remove each wedge;

[0099] 10) Take out the hollow motor winding cup after shaping to complete the shaping operation.

[0100] The hollow motor winding cup (such as Figure 11 As shown) and the hollow motor winding cup shaped by the existing rolling method (as shown Figure 10 As shown), the winding is obviously more compact and standardized, and the roundness is better; thus, the motor produced by the hollow motor winding cup shaped by the shaping tool of the present invention has better performance.

[0101] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should all be included in the scope of protection of the present invention.

Claims

1. A hollow motor winding cup shaping tool, characterized by: It includes a cup tube, a cone rod, a cover plate and a plurality of wedge blocks; The cup barrel is cylindrical, with an open upper end and a first through hole coaxially arranged on the bottom plate of the lower end; The cover plate is mounted on the upper end of the cup barrel, and a second through hole is provided on the cover plate coaxially with the first through hole; The plurality of wedge-shaped blocks are sequentially arranged in the cup barrel along the circumferential direction to form a shaping structure, and a shaping hole is coaxially left in the middle thereof; A space for placing the winding cup to be shaped is reserved between the outer wall of the shaping structure and the inner wall of the cup tube; The tapered rod comprises, from top to bottom, a first rod, a second rod, and a third rod coaxially connected in sequence; the first rod is cylindrical and adapted to the radial size of the second through hole; the second rod is truncated cone-shaped; the third rod is cylindrical and adapted to the radial size of the first through hole; the diameter of the large end of the second rod is equal to that of the first rod, and the diameter of the small end is larger than that of the third rod; a stopper is formed between the second and third rods; The roughness of the inner wall of the cup barrel and the outer wall of the wedge block is less than Ra1.6; The inner diameter of the cup barrel is 0.1-0.2 mm smaller than the target outer diameter of the winding cup; The outer diameter of the wedge block is 0.1-0.2 mm larger than the target inner diameter of the winding cup; The coaxiality of the cup tube, cover plate, cone rod, first through hole and second through hole is less than ; The cylindricality of the cup is less than ; During shaping, the second rod body and the third rod body of the tapered rod pass through the second through hole and are inserted into the shaping hole in the middle of the shaping structure; when the tapered rod is subjected to a downward force, the multiple wedge blocks can gradually and synchronously expand outward, so that the space size for placing the winding cup to be shaped is gradually reduced; when the limit platform of the tapered rod is pressed tightly against the bottom plate at the lower end of the cup barrel, the shaping structure is deformed into a structure coaxially arranged in the cup barrel, with a cylindrical outer shape and an inverted frustum-shaped hole inside. At this time, there is a gap between adjacent wedge blocks, and the space size for placing the winding cup to be shaped can make the winding cup to be shaped meet the shaping requirements.

2. The hollow motor winding cup shaping tool according to claim 1, characterized in that: The inner wall of the upper end of the cup barrel is provided with a step along the circumferential direction, and the upper end surface is provided with a plurality of mounting holes along the circumferential direction; The cover plate includes a main body and a support body; The main body is a circular plate, the outer diameter of which is equal to the outer diameter of the cup barrel, and the second through hole is coaxially arranged in the middle thereof; a mounting through hole is arranged on the main body at a position corresponding to the mounting hole; The support body is an annular protrusion coaxially arranged at the bottom of the main body, and the annular protrusion is adapted to the step at the upper end of the cup barrel; The locking screws are used to mount the cover plate on the cup barrel through the mounting through holes and the mounting holes.

3. The hollow motor winding cup shaping tool according to claim 2, characterized in that: The cross section of the wedge-shaped block is fan-shaped; The multiple wedge blocks are made by evenly dividing a structure with a truncated cone-shaped hole inside and a cylindrical outer portion along the circumferential direction and reducing the sector angle.

4. The hollow motor winding cup shaping tool according to claim 3, characterized in that: There are six wedge blocks, and the sector angle of each wedge block is 59 degrees.

5. The hollow motor winding cup shaping tool according to claim 4, characterized in that: Its material is 2Cr13.

6. A method for shaping windings using the hollow motor winding cup shaping tool according to claim 1, characterized in that: The following steps are involved: 1) placing the hollow motor winding cup to be shaped coaxially in the cup barrel; 2) Place multiple wedge-shaped blocks into the winding cup along the circumferential direction and assemble them into a shaped structure; 3) Install the cover on the upper end of the cup tube; 4) Insert the tapered rod through the second through hole of the cover plate into the truncated cone-shaped hole of the shaping structure, and apply external force to press down until the limit platform of the tapered rod touches the bottom plate of the lower end of the cup tube. At this time, the winding cup of the hollow motor to be shaped is in place; 5) Heat the cup barrel to ensure that the hollow motor winding cup is solidified after shaping; 6) Remove the cover from the upper end of the cup tube; 7) Push the cone rod out through the first through hole of the bottom plate at the lower end of the cup tube and remove the cone rod; 8) After the wedge structure is loosened, remove each wedge; 9) Take out the hollow motor winding cup after shaping to complete the shaping operation.

7. The method for shaping windings using the hollow motor winding cup shaping tool according to claim 6, characterized in that: The method for making the hollow motor winding cup to be shaped in step 1) is as follows: S1. Winding the winding sheets one by one According to the technical indicators of a single winding sheet, self-adhesive wire is used to tightly wind it on the winding tooling, and after winding, it is heated and solidified to obtain a diamond-shaped winding sheet; According to the above method, a plurality of winding sheets are wound; S2. Preparation of hollow motor winding cup to be shaped Select the appropriate number of winding sheets according to the size requirements of the hollow motor winding cup; The selected winding sheets are stacked in sequence, connected and cured; Use a cylindrical rod to initially roll the spliced ​​winding sheets into a round shape to form the hollow motor winding cup to be shaped.

8. The design method of the hollow motor winding cup shaping tool according to any one of claims 1 to 5, characterized in that: Design and processing according to the following requirements: Determine the size of the tapered rod; According to the target outer diameter of the hollow motor winding cup, the inner diameter of the cup barrel is determined, and the inner diameter is 0.1-0.2mm smaller than the target outer diameter; according to the size of the tapered rod, a first through hole is opened on the bottom plate of the lower end of the cup barrel; According to the size of the cone rod, a second through hole is opened on the cover plate; The outer diameter of the reshaped structure is determined based on the target inner diameter of the hollow motor winding cup, which is 0.1-0.2mm larger than the target inner diameter. The size of the inverted frustum-shaped hole inside the reshaped structure is determined based on the size of the tapered rod. The reshaped structure is then divided into multiple pieces along the circumference, and the sector angle of each piece is reduced so that all wedge-shaped pieces can fit into the winding cup before reshaping. During the above design and processing, it is necessary to ensure that the roughness of the inner wall of the cup barrel and the outer wall of the wedge block is less than Ra1.6; the coaxiality of the cup barrel, cover plate, cone rod, first through hole and second through hole is less than The cylindricality of the cup tube is less than .

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