Stator copper wire end cutting and flattening tool for flat wire motor

Abstract

The utility model discloses a kind of flat wire motor stator copper wire end part cutting flat tool, including telescopic cylinder, the end surface of telescopic cylinder is fixedly installed with connecting frame, connecting frame is fixedly installed with tool rest in, cutting knife sliding slot is horizontally opened in tool rest inside, cutting knife is slidably installed in cutting knife sliding slot, copper wire notch is opened in the lower surface of tool rest, copper wire notch is connected with cutting knife sliding slot, the side surface of cutting knife sliding slot is horizontally opened with strip sliding hole, and cutting knife sliding slot is connected with outside through strip sliding hole;The one end of piston rod of telescopic cylinder is connected with driving part, the other end of driving part passes through strip sliding hole and is connected with cutting knife, for driving cutting knife to slide in cutting knife sliding slot.The utility model overcomes the deficiency of prior art, can effectively guarantee that all skirting after cutting flat height consistency is exposed, in turn effectively avoid the height difference between copper wire, and then guarantee the consistency of welding quality.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to a cutting device for copper wire, specifically a tooling for cutting the ends of copper wires in the stator of a flat wire motor for small-batch trial production. Background Technology

[0002] In recent years, drive motors for new energy vehicles have rapidly developed towards higher power density, higher efficiency, higher speed, and platformization. Flat wire winding motors, with their significant advantages in efficiency, heat dissipation, and performance, are gradually replacing round wire winding motors and becoming the development trend of drive motors for new energy vehicles. Currently, the standard manufacturing process for flat wire motor stators is: wire forming → wire insertion → flaring → twisting → flattening → installing welding fixtures → end welding. However, with the increase in the number of motor layers (from 2 / 4 layers to 8 layers), the number of copper wire leads at the ends is increasing exponentially.

[0003] Taking a 48-slot, 8-layer flat wire stator as an example, there are 192 groups of copper wires, or 384 leads. Due to the influence of wire forming accuracy and twisting process parameters, the position of the copper wire leads after twisting deviates from the theoretical state of the digital model. Significant positional deviations make it difficult to insert the copper wires into the holes of the welding fixture, causing installation difficulties and, in severe cases, leading to wire pressing or even product scrap. Generally, after wire forming and before cutting, the copper wire leads have sharp corners for guidance, making them easier to insert into the welding fixture holes. If the copper wire leads are cut flat, the sharp corners are lost, further complicating the installation of the welding fixture. Simultaneously, the positional deviation of the copper wire leads, combined with being cut flat in a free state, results in height differences between each group of leads even after the welding fixture is clamped, easily leading to poor welding. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tooling for flattening the ends of copper wires in a flat-wire motor stator. This tooling overcomes the deficiencies of existing technologies, is reasonably designed, and can effectively ensure that all wire leads are exposed at a consistent height after flattening, thereby effectively avoiding height differences between copper wires and ensuring consistent welding quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flattening fixture for the end of copper wire in a flat-wire motor stator includes a telescopic cylinder. A connecting frame is fixedly mounted on the end face of the telescopic cylinder. A tool holder is fixedly mounted inside the connecting frame. A cutting groove is horizontally opened inside the tool holder. A cutting blade is slidably mounted in the cutting groove. A copper wire slot is opened on the lower surface of the tool holder. The copper wire slot is connected to the cutting groove. A strip-shaped sliding hole is horizontally opened on the side of the cutting groove. The cutting groove is connected to the outside through the strip-shaped sliding hole.

[0007] The piston rod of the telescopic cylinder is connected to one end of the driving component, and the other end of the driving component passes through the strip-shaped sliding hole and is connected to the cutter, which is used to drive the cutter to slide in the cutter sliding groove.

[0008] Preferably, the driving component includes a hinge seat, a first connecting plate, and a second connecting plate. The hinge seat is fixedly connected to the piston rod end of the telescopic cylinder. A first pin is fixedly installed between the two ear plates on both sides of the hinge seat. A waist-shaped slot is formed on the surface of the first connecting plate. The first pin passes through the waist-shaped slot and is slidably connected to the waist-shaped slot. The lower end of the first connecting plate is hinged to the blade holder through a second pin. A third pin passes through the middle of the cutter. Both ends of the third pin pass through a strip-shaped sliding hole and are connected to one end of the second connecting plate. The third pin slides along the axial direction of the strip-shaped sliding hole. The other end of the second connecting plate is hinged to the middle of the first connecting plate through a fourth pin.

[0009] Preferably, the connecting frame includes a first side plate and a second side plate, and the tool holder is fixedly connected between the first side plate and the second side plate.

[0010] Preferably, a connecting rod is fixedly connected between the first side plate and the second side plate.

[0011] Preferably, the connecting frame is covered with a protective frame, which is fixedly connected to the front and rear sides and the top side of the first side plate and the second side plate, respectively.

[0012] Preferably, the sidewall of the copper wire slot is chamfered.

[0013] Preferably, multiple copper wire slots are provided, and the multiple copper wire slots are evenly distributed side by side at the bottom of the tool holder; a partition rib is provided between two adjacent copper wire slots.

[0014] Preferably, a copper slag outlet is provided at the left end of the lower surface of the blade holder, and the end of the cutting blade groove is connected to the outside through the copper slag outlet.

[0015] Preferably, the tool holder has recesses on both sides of its side walls, and the recesses are located on both sides of the copper wire groove opening.

[0016] This utility model provides a tooling for flattening the ends of copper wires in a flat-wire motor stator, offering the following advantages: By first fitting the overall welding fixture onto the stator product and then flattening the copper wire ends, the welding fixture can be fitted while preserving the sharp corners of the copper wires. This utilizes the self-guiding effect of the copper wire's sharp corners to facilitate the entry of the wire leads into the holes of the welding fixture, effectively reducing the installation difficulty of the welding fixture and increasing its compatibility with the positional accuracy of the wire leads. Furthermore, by ensuring zero-gap contact between the bottom surface of the tool holder and the upper surface of the welding fixture, the exposed height of all wire leads after flattening is effectively guaranteed, thus effectively avoiding height differences between copper wires and ensuring consistent welding quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of this utility model or the prior art will be briefly introduced below.

[0018] Figure 1 A schematic diagram of the structure of this utility model;

[0019] Figure 2 A schematic diagram of the tool holder's movement principle in this utility model;

[0020] Figure 3 Schematic diagram of the tool holder in this utility model Figure 1 ;

[0021] Figure 4 Schematic diagram of the tool holder in this utility model Figure 2 ;

[0022] Figure 5 A cross-sectional view of the tool holder in this utility model;

[0023] Figure 6 A schematic diagram of the structure of this utility model in its initial state;

[0024] Figure 7 A schematic diagram of the structure of this utility model in its working position;

[0025] Figure 8 A schematic diagram of the structure of this utility model assembled with a welding fixture;

[0026] Explanation of the labels in the diagram:

[0027] 1. Telescopic cylinder; 2. Connecting frame; 3. Tool holder; 4. Cutting blade groove; 5. Cutting blade; 6. Copper wire groove; 7. Strip-shaped sliding hole; 8. Hinge seat; 9. First connecting plate; 10. Second connecting plate; 11. First pin; 12. Waist-shaped slot; 13. Second pin; 14. Third pin; 15. Fourth pin; 16. Rib; 17. Copper slag outlet; 18. Notch; 19. Manual valve; 20. Copper wire; 21. First side plate; 22. Second side plate; 23. Connecting rod; 24. Protective frame; 31. Welding fixture. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0029] Example 1, as Figure 1-8As shown, a flattening fixture for the end of copper wire in a flat wire motor stator includes a telescopic cylinder 1. A connecting frame 2 is fixedly installed on the left end face of the telescopic cylinder 1. A blade holder 3 is fixedly installed inside the connecting frame 2. A cutting groove 4 is horizontally opened inside the blade holder 3. A cutting blade 5 is slidably installed inside the cutting groove 4. A copper wire slot 6 is opened on the lower surface of the blade holder 3. The copper wire slot 6 is connected to the cutting groove 4. A strip-shaped sliding hole 7 is horizontally opened on the side of the cutting groove 4. The cutting groove 4 is connected to the outside through the strip-shaped sliding hole 7.

[0030] The piston rod of the telescopic cylinder 1 is connected to one end of the drive component, and the other end of the drive component passes through the strip-shaped sliding hole 7 and is connected to the cutter 5, which is used to drive the cutter 5 to slide in the cutter slide groove 4.

[0031] In this embodiment, the driving component includes a hinge seat 8, a first connecting plate 9, and a second connecting plate 10. The hinge seat 8 is fixedly connected to the piston rod end of the telescopic cylinder 1. A first pin 11 is fixedly installed between the two ear plates on both sides of the hinge seat 8. A waist-shaped slot 12 is opened on the surface of the first connecting plate 9. The first pin 11 passes through the waist-shaped slot 12 and is slidably connected to the waist-shaped slot 12. The lower end of the first connecting plate 9 is hinged to the knife holder 3 through a second pin 13. A third pin 14 passes through the middle of the cutter 5. The two ends of the third pin 14 pass through the strip-shaped sliding hole 7 and are connected to one end of the second connecting plate 10. The third pin 14 slides along the axial direction of the strip-shaped sliding hole 7. The other end of the second connecting plate 10 is hinged to the middle of the first connecting plate 9 through a fourth pin 15.

[0032] Working principle:

[0033] In use, first, install the entire welding fixture 31 onto the stator product and tighten the welding fixture 31 to clamp the copper wire. Then, tightly fit the tool holder 3 against the upper surface of the welding fixture 31, so that the end of the copper wire 20 of the stator product passes through the copper wire groove 6 on the lower surface of the tool holder 3 and enters the cutting groove 4. Figure 8As shown. Then press the manual valve 19 of the telescopic cylinder 1 to allow compressed air to enter the cylinder body of the telescopic cylinder 1, thereby driving the piston rod of the telescopic cylinder 1 to extend, which in turn drives the hinge seat 8 to move to the left. Then, through the sliding action of the first pin 11 in the waist-shaped slot 12, the first connecting plate 9 can be forced to rotate around the second pin 13. Since one end of the second connecting plate 10 is connected to the middle of the first connecting plate 9 through the fourth pin 15, the rotation of the first connecting plate 9 can drive the second connecting plate 10 to move to the left. Since the second connecting plate 10 is connected to the cutter 5 through the third pin 14, and the third pin 14 is constrained by the strip-shaped sliding hole 7, the transmission action of the second connecting plate 10 can drive the cutter 5 to slide horizontally in the cutter slide groove 4. Then, the cutting edge of the cutter 5 can be used to cut the copper wire end of the stator product flat, ensuring that the copper wire end is flat and smooth. Then, the manual valve 19 is released, causing the compressed air in the cylinder of the telescopic cylinder 1 to be discharged, and the piston rod to retract. This, in turn, pulls the first connecting plate 9 to rotate in the opposite direction via the hinge seat 8, which in turn drives the second connecting plate 10 and the cutter 5 to move in the opposite direction to return to their initial positions. The cutting fixture is then placed at the next copper wire end to be processed, and the above operation is repeated until all copper wire ends are cut flat. This ensures efficient and consistent processing of the copper wire ends throughout the stator product, avoids height differences between copper wires, and improves product quality and production efficiency.

[0034] In this invention, since the overall welding fixture 31 is first fitted onto the stator product before the copper wire ends are cut flat, the welding fixture can be fitted while retaining the sharp corners of the copper wire. This allows the self-guiding effect of the copper wire's sharp corners to facilitate the entry of the copper wire leads into the welding fixture's holes, effectively reducing the installation difficulty of the welding fixture 31 and increasing its compatibility with lead position accuracy. Furthermore, by ensuring zero-gap contact between the bottom surface of the tool holder 3 and the upper surface of the welding fixture, and by cutting the copper wire leads while the copper wire is clamped by the welding fixture, and maintaining this clamped state after cutting, the height of all exposed leads after cutting is effectively consistent, thus avoiding height differences between copper wires and ensuring consistent welding quality.

[0035] Furthermore, since the wall thickness of the copper wire slot 6 determines the cutting length of the copper wire end, which in turn determines the cutting height of the stator product welding end, in this embodiment, the two ends of the tool holder 3 are connected to the connecting frame 2 by bolts. Therefore, different stator products can be matched by changing the tool holder 3 and the cutter 5 to meet the copper wire end face cutting requirements of different stator products.

[0036] In Embodiment Two, as a further preferred embodiment of Embodiment One, the connecting frame 2 includes a first side plate 21 and a second side plate 22. The blade holder 3 is fixedly connected between the first side plate 21 and the second side plate 22. A connecting rod 23 is also fixedly connected between the first side plate 21 and the second side plate 22. A protective frame 24 is provided on the outside of the connecting frame 2, and the protective frame 24 is fixedly connected to the front, rear, and top sides of the first side plate 21 and the second side plate 22, respectively. The connecting rod 23 effectively ensures the structural stability of the entire connecting frame 2, preventing deformation or displacement during operation, thereby effectively ensuring the precise cutting of the copper wire end by the cutter 5. The protective frame 24 further enhances operational safety and avoids accidental injury.

[0037] In Example 3, as a further preferred embodiment of Example 1, a chamfer is provided at the lower end of the sidewall of the copper wire slot 6. By providing the chamfer, the end of the copper wire can be inserted into the copper wire slot 6 more smoothly, reducing resistance during insertion and improving ease of operation. At the same time, the chamfer design can effectively prevent damage to the end of the copper wire caused by friction during insertion, further ensuring the flatness and integrity of the end of the copper wire and ensuring welding quality.

[0038] Example 4, as Figure 4 As shown, in a further preferred embodiment, multiple copper wire slots 6 are provided, evenly arranged side-by-side at the bottom of the cutter holder 3; a partition rib 16 is provided between two adjacent copper wire slots 6. The number of copper wire slots 6 is set according to the number of copper wires in the stator product, such as 3 copper wire slots 6 for a 6-layer wire product and 4 copper wire slots 6 for an 8-layer wire product. The partition rib 16 is provided between two adjacent copper wire slots 6 to act as a rigid support for the copper wire, thereby enabling top-cutting in conjunction with the linear advance of the cutter 5, causing the copper wire to fracture under pure compressive stress, avoiding deformation of the copper wire due to shear stress, and effectively ensuring a smoother cut at the end of the copper wire.

[0039] Example 5, as Figure 4 As shown, in a further preferred embodiment, a copper slag discharge outlet 17 is provided at the left end of the lower surface of the cutter holder 3, and the end of the cutter slide 4 is connected to the outside through the copper slag discharge outlet 17. Thus, when the cutter 5 advances along a horizontal straight line, while cutting the copper wire end flat, the copper slag generated during cutting can also be smoothly pushed to the copper slag discharge outlet 17, so that the cut copper slag can be discharged in a timely manner, preventing the accumulation of copper slag from affecting cutting accuracy and equipment operating efficiency, and ensuring the continuity and stability of the cutting process.

[0040] Example 6, as Figure 3-4As shown, as a further preferred embodiment, the tool holder 3 has recesses 18 on both sides of its side walls, with the recesses 18 located on both sides of the copper wire slots 6. By providing recesses 18 on both side walls of the tool holder 3, when the tool holder 3 is pressed tightly against the upper surface of the welding fixture, the recesses 18 can avoid interference between adjacent slot wires, ensuring that each copper wire slot 6 can be cut independently and accurately, further improving welding quality and efficiency.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tooling for flattening the ends of copper wires in a flat-wire motor stator, characterized in that: The device includes a telescopic cylinder (1), a connecting frame (2) is fixedly installed on the end face of the telescopic cylinder (1), a knife holder (3) is fixedly installed inside the connecting frame (2), a cutting groove (4) is horizontally opened inside the knife holder (3), a cutting knife (5) is slidably installed inside the cutting groove (4), a copper wire slot (6) is opened on the lower surface of the knife holder (3), the copper wire slot (6) is connected to the cutting groove (4), a strip-shaped sliding hole (7) is horizontally opened on the side of the cutting groove (4), and the cutting groove (4) is connected to the outside through the strip-shaped sliding hole (7); The piston rod of the telescopic cylinder (1) is connected to one end of the drive component, and the other end of the drive component passes through the strip-shaped sliding hole (7) and is connected to the cutter (5) to drive the cutter (5) to slide in the cutter slide groove (4).

2. The flat wire stator copper wire end cutting fixture according to claim 1, characterized in that: The driving component includes a hinge seat (8), a first connecting plate (9), and a second connecting plate (10). The hinge seat (8) is fixedly connected to the piston rod end of the telescopic cylinder (1). A first pin (11) is fixedly installed between the two ear plates on both sides of the hinge seat (8). A waist-shaped slot (12) is opened on the surface of the first connecting plate (9). The first pin (11) passes through the waist-shaped slot (12) and is slidably connected to the waist-shaped slot (12). The lower end of the first connecting plate (9) is hinged to the knife holder (3) through a second pin (13). A third pin (14) passes through the middle of the cutter (5). The two ends of the third pin (14) pass through the strip-shaped sliding hole (7) and are connected to one end of the second connecting plate (10). The third pin (14) slides along the axial direction of the strip-shaped sliding hole (7). The other end of the second connecting plate (10) is hinged to the middle of the first connecting plate (9) through a fourth pin (15).

3. The flat wire stator copper wire end cutting tool according to claim 1, characterized in that: The connecting frame (2) includes a first side plate (21) and a second side plate (22), and the knife holder (3) is fixedly connected between the first side plate (21) and the second side plate (22).

4. The flat wire stator copper wire end cutting tool according to claim 3, characterized in that: A connecting rod (23) is also fixedly connected between the first side plate (21) and the second side plate (22).

5. The flat wire stator copper wire end cutting fixture according to claim 3, characterized in that: The connecting frame (2) is covered with a protective frame (24), which is fixedly connected to the front and rear sides and the top side of the first side plate (21) and the second side plate (22).

6. The flat wire stator copper wire end cutting tool according to claim 1, characterized in that: The copper wire slot (6) has a chamfered sidewall.

7. The flat wire stator copper wire end cutting tool according to claim 1, characterized in that: The copper wire slots (6) are provided in multiple ways, and the multiple copper wire slots (6) are evenly distributed side by side at the bottom of the tool holder (3); a partition rib (16) is provided between two adjacent copper wire slots (6).

8. The flat wire stator copper wire end cutting tool according to claim 1, characterized in that: The lower surface of the blade holder (3) has a copper slag outlet (17) at the left end, and the end of the cutter groove (4) is connected to the outside through the copper slag outlet (17).

9. The tooling for flattening the ends of copper wires in a flat-wire motor according to claim 1, characterized in that: The tool holder (3) has notches (18) on both sides of its side walls, and the notches (18) are located on both sides of the copper wire groove (6).

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