A pre-bending die for a stator core end plate

Abstract

A pre-bending die for a stator core end plate includes an upper die assembly and a lower die assembly corresponding to each other. The upper die assembly includes an upper template and an upper forming die disposed on the upper template, the upper forming die being located on the bottom surface of the upper template. The lower die assembly includes a lower template and a lower forming die disposed on the lower template, the lower forming die being located on the top surface of the lower template and corresponding to the upper forming die. This utility model provides a pre-bending die for a stator core end plate, which can be used for pre-bending the stator core end plate.

Description

Technical Field

[0001] This utility model belongs to the technical field of motor stator core production, specifically relating to a... Background Technology

[0002] The stator core is one of the key components of a permanent magnet synchronous motor. It is made by stacking and welding several stator laminations. In order to prevent the internal edges of the stator core from warping and to avoid deformation and springing apart between the stator core laminations, the end plate needs to be pre-bent. The pre-bent end plate is pressed tightly to the end of the stator core and fixed to the end of the stator core by welding.

[0003] See Figure 1-2 , Figure 1 The image shows the stator core end plate 3 before processing. It is flat and includes a main body 31, a winding claw 32, and an inner hole 33. The winding claw 32 is located on the outside of the main body 31, and the inner hole 33 is located on the inside of the main body 31. Figure 2 The stator core end plate 3 after processing is shown. It includes a main body 31, a winding claw 32 and an inner hole 33. The winding claw 32 is bent downward and set on the outside of the main body 31, and the inner hole 33 is set on the inside of the main body 31. In order to perform pre-bending processing on the stator core end plate 3, a corresponding forming stamping die needs to be designed. Utility Model Content

[0004] The purpose of this utility model is to provide a pre-bending mold for stator core end plates, which can be used to pre-bend stator core end plates.

[0005] To achieve the above objectives, the technical solution provided by this utility model embodiment is as follows:

[0006] A pre-bending die for a stator core end plate includes an upper die assembly and a lower die assembly, which are corresponding to each other.

[0007] The upper mold assembly includes an upper template and an upper forming mold disposed on the upper template, the upper forming mold being located on the bottom surface of the upper template;

[0008] The lower mold assembly includes a lower template and a lower forming mold disposed on the lower template. The lower forming mold is located on the top surface of the lower template and corresponds to the upper forming mold.

[0009] When the upper mold assembly and the lower mold assembly are closed, the upper forming mold and the lower forming mold cooperate with each other to bend the winding claws of the stator core end plate.

[0010] The upper forming mold includes an upper pressing part and an upper bending part. The vertical projection of the upper pressing part is circular and horizontally arranged in the middle of the bottom surface of the upper forming mold. The vertical projection of the upper bending part is annular and surrounds the upper pressing part.

[0011] The lower forming mold includes a lower pressing part and a lower bending part. The vertical projection of the lower pressing part is circular and horizontally arranged in the middle of the top surface of the lower forming mold. The vertical projection of the lower bending part is annular and surrounds the lower pressing part.

[0012] When the upper mold assembly and the lower mold assembly are closed, the upper pressing part and the lower pressing part cooperate to press the stator core end plate tightly, and the upper bending part and the lower bending part cooperate to bend the winding claw of the stator core end plate.

[0013] When the upper forming die is a forming concave die and the lower forming die is a forming convex die, the upper bending part bends downward relative to the upper pressing part, and the lower bending part bends downward relative to the lower pressing part.

[0014] The included angle between the upper bending part and the upper pressing part is A, 170° < A < 175°, and the included angle between the lower bending part and the lower pressing part is B, 170° < B < 175°.

[0015] A guide structure is provided between the upper mold assembly and the lower mold assembly, and the upper forming mold is guided to move along the height direction of the lower forming mold through the guide structure;

[0016] The guiding structure includes a guide post disposed on one of the upper and lower forming molds and a guide hole disposed on the other of the upper and lower forming molds. The guide post and the guide hole are correspondingly disposed. When the guide post extends into the guide hole and moves back and forth along the length direction of the guide post, it guides the upper forming mold to move along the height direction of the lower forming mold.

[0017] The guiding structure consists of several groups, with several guide posts evenly arranged circumferentially on the upper forming mold and several guide holes evenly arranged circumferentially on the lower forming mold.

[0018] The lower mold assembly is provided with positioning components. There are several positioning components, which are evenly arranged circumferentially on the top surface of the lower forming mold. The diameter of the trajectory of each positioning component is equivalent to the inner diameter of the stator core end plate.

[0019] The upper mold assembly also includes an upper mold base and an upper mold handle. The upper mold base is disposed on the top surface of the upper mold plate, and the upper mold handle is disposed on the upper mold base.

[0020] An installation structure is provided between the upper mold shank and the upper mold base, and the upper mold shank is installed on the upper mold base through the installation structure;

[0021] The mounting structure includes a mounting part and a mounting flange on the upper mold shank, and a mounting hole and a mounting countersunk hole on the upper mold base. The mounting part and the mounting flange are located on the side wall of the upper mold shank, with the mounting flange located below the mounting part. The diameter of the mounting flange is larger than the diameter of the mounting part. The mounting hole is provided corresponding to the mounting part and penetrates the end face of the upper mold base. The mounting countersunk hole is provided corresponding to the mounting flange and is located on the bottom surface of the upper mold base. The mounting part is inserted into the mounting hole, and the mounting flange extends into the mounting countersunk hole, with both having an interference fit, so that the upper mold shank is mounted on the upper mold base.

[0022] The lower mold assembly also includes a lower mold base, which is disposed on the bottom surface of the lower mold plate.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model uses a pre-bending mold for stator core end plates that adopts the above technical solution, which can be used to pre-bend stator core end plates. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the unprocessed structure of the stator core end plate according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the processed structure of the stator core end plate according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of a pre-bending mold for a stator core end plate according to an embodiment of the present invention.

[0028] Figure 4 This is a cross-sectional view of a pre-bending mold for a stator core end plate according to an embodiment of the present invention.

[0029] Figure 5 This is a cross-sectional view of the molding die in one embodiment of the present invention.

[0030] Figure 6 This is a cross-sectional view of the molding die according to an embodiment of the present invention.

[0031] Figure 7 This is an exploded view of the upper mold assembly according to an embodiment of the present invention.

[0032] Figure 8 This is an exploded view of the lower mold assembly according to an embodiment of the present invention.

[0033] Figure 9 This is a schematic diagram of the working process of the pre-bending mold for the stator core end plate according to an embodiment of the present invention.

[0034] Figure 10 This is a schematic diagram of the working process of the pre-bending mold for the stator core end plate according to an embodiment of the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0036] See Figure 1-10 The pre-bending mold for the stator core end plate includes an upper mold assembly 1 and a lower mold assembly 2, which are corresponding to each other. In this embodiment, the upper mold assembly 1 includes an upper template 11, an upper forming mold 12, an upper mold base 13, and an upper mold handle 14. The upper forming mold 12 includes an upper pressing part 121 and an upper bending part 122, which are fastened to the bottom surface of the upper template 11. Specifically, the vertical projection of the upper pressing part 121 is circular and corresponds to the shape of the stator core end plate 3. The upper pressing part 121 is horizontally arranged in the middle of the bottom surface of the upper forming mold 12. The vertical projection of the upper bending part 122 is annular and corresponds to the shape of the stator core end plate 3, and is arranged around the periphery of the upper pressing part 121. The upper mold base 13 is fastened to the top surface of the upper template 11, and the upper mold handle 14 is fastened to the upper mold base 13. The lower mold assembly 2 includes a lower template 21, a lower forming mold 22, and a lower mold base 24. The lower forming mold 22 includes a lower pressing part 22. 1. The lower bending part 222 is fastened to the top surface of the lower template 21. The vertical projection of the lower pressing part 221 is circular and corresponds to the shape of the stator core end plate 3. The lower pressing part 221 is horizontally positioned in the middle of the top surface of the lower forming mold 22. The vertical projection of the lower bending part 222 is annular and corresponds to the shape of the stator core end plate 3, and is arranged around the periphery of the lower pressing part 221. The lower mold base 24 is fastened to the bottom surface of the lower template 21. When the upper mold assembly... When part 1 and lower mold assembly 2 are closed, the upper pressing part 121 and the lower pressing part 221 cooperate to press the stator core end plate 3 tightly to ensure that the middle part of the stator core end plate 3 is fixed. The upper bending part 122 and the lower bending part 222 cooperate to bend the winding claws 32 of the stator core end plate 3 to ensure that each winding claw 32 of the stator core end plate 3 can be bent. Through the above technical solution, the stator core end plate 3 can be pre-bent.

[0037] Furthermore, in this embodiment, when the upper forming die 12 is preferably a forming die and the lower forming die 22 is preferably a forming punch, the upper bending portion 122 bends downward relative to the upper pressing portion 121, and the lower bending portion 222 bends downward relative to the lower pressing portion 221. Through the above technical solution, the pre-bending requirements of the winding claw 32 of the stator core end plate 3 can be matched. The vertical cross-sectional angle between the upper bending portion 122 and the upper pressing portion 121 is A, which is preferably 173°, and the vertical cross-sectional angle between the lower bending portion 222 and the lower pressing portion 221 is B, which is preferably 173°. Through the above technical solution, the pre-bending angle of the winding claw 32 of the stator core end plate 3 can be controlled, ensuring that when the stator core end plate 3 is installed on the stator core, the stator core laminations can be pressed tightly and excessive deformation of the stator core end plate 3 can be avoided. This is understood by those skilled in the art.

[0038] Furthermore, a guide structure is provided between the upper mold assembly 1 and the lower mold assembly 2. The upper forming mold 12 is guided to move along the height direction of the lower forming mold 22 through the guide structure. Specifically, in this embodiment, the number of guide structures is preferably four sets, which include guide posts 123 and guide holes 223. The guide posts 123 are disposed on the upper forming mold 12 and extend downward from the upper forming mold 12. The four guide posts 123 are evenly arranged circumferentially on the upper forming mold 12. The guide holes 223 are disposed on the lower forming mold 22 and located on the top surface of the lower forming mold 22. The four guide holes 223 are evenly arranged circumferentially on the lower forming mold 22. 2. The guide post 123 and the guide hole 223 are correspondingly set, that is, the guide post 123 and the guide hole 223 are the same in shape and size and their positions are vertically corresponding. When the upper mold assembly 1 and the lower mold assembly 2 are closed, the guide post 123 extends into the guide hole 223 and moves back and forth along the length direction of the guide post 123, so that the upper forming mold 12 is guided to move along the height direction of the lower forming mold 22. Through the above technical solution, the alignment accuracy of the upper forming mold 12 and the lower forming mold 22 can be ensured when the mold is closed, and the deviation of the mold when bending the winding claw 32 of the stator core end plate 3 can be avoided. Those skilled in the art can understand this.

[0039] Furthermore, the lower mold assembly 2 is provided with positioning components 23. Specifically, in this embodiment, the positioning components 23 are preferably positioning pins, and the number of them is preferably four, which are evenly arranged circumferentially on the top surface of the lower forming mold 22. The diameter of the trajectory of each positioning component 23 is equivalent to the diameter of the inner hole 33 of the stator core end plate 3. When the stator core end plate 3 is placed on the lower forming mold 22, the side wall of the inner hole 33 of the stator core end plate 3 abuts against the side wall of each positioning component 23. Through the above technical solution, the positioning components 23 can quickly position the stator core end plate 3 on the lower forming mold 22 to prevent the stator core end plate 3 from shifting. This is understood by those skilled in the art.

[0040] Furthermore, an installation structure is provided between the upper mold shank 14 and the upper mold base 13. The upper mold shank 14 is installed on the upper mold base 13 through the installation structure. Specifically, in this embodiment, the installation structure includes a mounting part 141, a mounting flange 142, a mounting hole 131, and a mounting countersunk hole 132. The mounting part 141 and the mounting flange 142 are both disposed on the upper mold shank 14. The mounting part 141 and the mounting flange 142 are located on the side wall of the upper mold shank 14, and the mounting flange 142 is located below the mounting part 141. The diameter of the mounting flange 142 is larger than the diameter of the mounting part 141. The mounting hole 131 and the mounting flange 142 are connected to the upper mold base 13. The mounting holes 132 are all provided on the upper mold base 13. The mounting holes 131 are provided corresponding to the mounting parts 141 and penetrate through the end face of the upper mold base 13. The mounting holes 132 are corresponding to the mounting flanges 142 and are located on the bottom surface of the upper mold base 13. When the mounting parts 141 are inserted into the mounting holes 131 and the mounting flanges 142 extend into the mounting holes 132 and the two are interference-fitted, the upper mold shank 14 is installed on the upper mold base 13. Through the above technical solutions, the assembly structure of the mold is simpler, which facilitates the rapid assembly of the mold, reduces the number of assembly parts of the mold, and reduces the manufacturing cost of the mold. This is understandable to those skilled in the art.

[0041] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A pre-bending die for a stator core end plate, comprising an upper die assembly (1) and a lower die assembly (2) corresponding to each other, characterized in that: The upper mold assembly (1) includes an upper template (11) and an upper forming mold (12) disposed on the upper template (11), the upper forming mold (12) being located on the bottom surface of the upper template (11); The lower mold assembly (2) includes a lower template (21) and a lower forming mold (22) disposed on the lower template (21). The lower forming mold (22) is located on the top surface of the lower template (21) and corresponds to the upper forming mold (12). When the upper mold assembly (1) and the lower mold assembly (2) are closed, the upper forming mold (12) and the lower forming mold (22) cooperate with each other to bend the winding claw (32) of the stator core end plate (3).

2. The pre-bending die for the stator core end plate according to claim 1, characterized in that, The upper forming mold (12) includes an upper pressing part (121) and an upper bending part (122). The vertical projection of the upper pressing part (121) is circular and is horizontally arranged in the middle of the bottom surface of the upper forming mold (12). The vertical projection of the upper bending part (122) is annular and is arranged around the periphery of the upper pressing part (121). The lower forming mold (22) includes a lower pressing part (221) and a lower bending part (222). The vertical projection of the lower pressing part (221) is circular and is horizontally arranged in the middle of the top surface of the lower forming mold (22). The vertical projection of the lower bending part (222) is annular and is arranged around the lower pressing part (221). When the upper mold assembly (1) and the lower mold assembly (2) are closed, the upper pressing part (121) and the lower pressing part (221) cooperate with each other to press the stator core end plate (3), and the upper bending part (122) and the lower bending part (222) cooperate with each other to bend the winding claw (32) of the stator core end plate (3).

3. The pre-bending die for the stator core end plate according to claim 2, characterized in that, When the upper forming die (12) is a forming die and the lower forming die (22) is a forming punch, the upper bending part (122) bends downward relative to the upper pressing part (121), and the lower bending part (222) bends downward relative to the lower pressing part (221).

4. The pre-bending die for the stator core end plate according to claim 2, characterized in that, The included angle between the upper bending part (122) and the upper pressing part (121) is A, 170° < A < 175°, and the included angle between the lower bending part (222) and the lower pressing part (221) is B, 170° < B < 175°.

5. The pre-bending die for the stator core end plate according to claim 1, characterized in that, A guide structure is provided between the upper mold assembly (1) and the lower mold assembly (2), and the upper forming mold (12) is guided to move along the height direction of the lower forming mold (22) through the guide structure; The guiding structure includes a guide post (123) disposed on one of the upper molding mold (12) and the lower molding mold (22), and a guide hole (223) disposed on the other of the upper molding mold (12) and the lower molding mold (22). The guide post (123) and the guide hole (223) are disposed correspondingly. When the guide post (123) extends into the guide hole (223) and moves back and forth along the length direction of the guide post (123), the upper molding mold (12) is guided to move along the height direction of the lower molding mold (22).

6. The pre-bending die for the stator core end plate according to claim 4, characterized in that, The guide structure consists of several groups, with several guide posts (123) arranged circumferentially on the upper forming mold (12) and several guide holes (223) arranged circumferentially on the lower forming mold (22).

7. The pre-bending die for the stator core end plate according to claim 1, characterized in that, The lower mold assembly (2) is provided with positioning components (23). There are several positioning components (23) arranged evenly in the circumferential direction on the top surface of the lower forming mold (22). The diameter of the trajectory of each positioning component (23) is equivalent to the diameter of the inner hole (33) of the stator core end plate (3).

8. The pre-bending die for the stator core end plate according to any one of claims 1-6, characterized in that, The upper mold assembly (1) also includes an upper mold base (13) and an upper mold handle (14). The upper mold base (13) is disposed on the top surface of the upper template (11), and the upper mold handle (14) is disposed on the upper mold base (13).

9. The pre-bending die for the stator core end plate according to claim 8, characterized in that, An installation structure is provided between the upper mold handle (14) and the upper mold base (13), and the upper mold handle (14) is installed on the upper mold base (13) through the installation structure; The mounting structure includes a mounting part (141) and a mounting flange (142) disposed on the upper mold shank (14), and a mounting hole (131) and a mounting countersunk hole (132) disposed on the upper mold base (13). The mounting part (141) and the mounting flange (142) are located on the side wall of the upper mold shank (14), and the mounting flange (142) is located below the mounting part (141). The diameter of the mounting flange (142) is larger than the diameter of the mounting part (141). The mounting hole (131) is disposed corresponding to the mounting part (141) and penetrates the end face of the upper mold base (13). The mounting countersunk hole (132) is disposed corresponding to the mounting flange (142) and is located on the bottom surface of the upper mold base (13). The mounting part (141) is inserted into the mounting hole (131), and the mounting flange (142) extends into the mounting countersunk hole (132) and the two are interference-fitted, so that the upper mold shank (14) is mounted on the upper mold base (13).

10. The pre-bending die for the stator core end plate according to any one of claims 1-6, characterized in that, The lower mold assembly (2) also includes a lower mold base (24), which is disposed on the bottom surface of the lower mold plate (21).

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