A hairpin wire bending forming device of an electric motor

Abstract

A kind of hairpin line bending forming device of motor, including fixed mechanism being provided in the length direction of machine table two sides, fixed mechanism is used to clamp terminal end;Clamp mechanism is arranged between two fixed mechanisms, clamp mechanism includes two clamping bending components being oppositely arranged in the width direction of machine table, clamping bending component has clamping part, clamping bending component is arranged with two adjacent fixed mechanisms, the clamping part of two clamping bending components is close to each other or away from each other, and the clamping part of two clamping parts is used to clamp the upper and lower two sections of middle part of terminal respectively;Two jacking mechanisms are provided, two jacking mechanisms are arranged in the width direction of machine table between clamp mechanism and fixed mechanism, and the output end of jacking mechanism is spaced apart with two jacking parts, and jacking part is arranged in the width direction of machine table.The two ends of terminal are clamped by fixed mechanism, the middle part of terminal is stretched away from each other by two clamping parts, the upper and lower two sections are staggered outward, jacking part is pushed upward to form arc transition, realizes step-by-step forming, and avoids stamping damage.

Description

Technical Field

[0001] This invention relates to the field of motor processing equipment technology, and in particular to a device for bending and forming the hairpin wire of a motor. Background Technology

[0002] In the bending and forming process of motor hairpin wires, it is usually necessary to bend the long, ring-shaped terminal into a predetermined three-dimensional shape, so that the upper and lower sections are misaligned in the vertical and horizontal directions, and the ends form a rounded transition, ultimately forming a hairpin wire. Existing forming methods mostly use one-time stamping dies or step-by-step manual bending. In one-time stamping, the upper and lower dies are directly pressed together, and the terminal surface is subjected to significant impact pressure and sliding friction instantaneously. This can easily leave indentations, scratches, or even micro-cracks on the copper substrate or surface plating, affecting the terminal's conductivity and corrosion resistance. While step-by-step manual bending can reduce surface damage, it suffers from poor operational consistency. It is difficult to maintain symmetry in the misalignment of the upper and lower terminal sections, and the position and radius of the end rounded transition can easily deviate from the design values, resulting in the formed terminal not being able to precisely fit with other motor components. Furthermore, manual bending is inefficient and cannot meet the needs of mass production. Summary of the Invention

[0003] To improve the production efficiency and quality of terminals, this application provides a device for bending and forming hairpin wires for motors.

[0004] The hairpin wire bending and forming device for an electric motor provided in this application adopts the following technical solution: A hairpin wire bending and forming device for an electric motor includes a fixing mechanism, which is provided on both sides of the machine platform along its length and is used to clamp the end of a terminal; a clamping mechanism, which is disposed between the two fixing mechanisms and includes two clamping bending components disposed opposite each other along the width of the machine platform. Each clamping bending component has a clamping portion and is disposed adjacent to the two fixing mechanisms. The clamping portions of the two clamping bending components are disposed close to or far from each other, and are respectively used to clamp the upper and lower sections of the middle part of the terminal; and a lifting mechanism, which has two lifting mechanisms, which are disposed on both sides of the machine platform and located between the clamping mechanism and the fixing mechanism. The output end of the lifting mechanism is provided with two lifting portions spaced apart along the width of the machine platform, and the lifting portions are raised and lowered.

[0005] By adopting the above technical solution, the fixing mechanism clamps the ends of the terminal on both sides of the machine tool along its length, constraining both ends of the terminal. The two clamping parts move closer or further apart, respectively clamping the two sections of the terminal's middle. Through the movement of moving away from each other, the two clamping parts stretch the middle of the terminal to both sides in the width direction, causing the upper and lower sections of the terminal's middle section to bend outwards and form a hairpin line. The lifting part pushes the terminal upwards towards the end area of ​​the fixing mechanism, causing the end of the terminal to bend upwards and form an arc transition. This achieves a step-by-step forming sequence of first fixing the two ends, then stretching the middle section, and finally lifting the end, avoiding damage to the terminal surface caused by a one-time stamping.

[0006] Optionally, the two clamping and bending components are respectively disposed on two movable plates, which are movably disposed on the machine base, and the two movable plates are disposed close to or far from each other.

[0007] By adopting the above technical solution, when the two movable plates move away from each other, the clamping and bending assembly mounted on the movable plates moves as a whole, with the clamping parts on both sides stretching the middle of the terminal outward. This overall movement of the movable plates avoids the complex structure of individually driving each clamping part; all clamping parts on the same side can be driven to move away or closer synchronously through a single movable plate. This ensures that the deformation of each segment of the terminal on the same side is the same during the stretching process.

[0008] Optionally, at least two sets of parallel swing arms are hinged between the bottom of the movable plate and the machine base, and the machine base is provided with a swing drive component, the output end of which is hinged to one of the sets of swing arms.

[0009] By adopting the above technical solution, the parallel-arranged swing arms, movable plate, and machine base form a parallelogram linkage mechanism. When the swing drive drives one set of swing arms to swing, the movable plate moves along an arc trajectory while maintaining a constant horizontal angle. As the movable plates move away from each other, the arc trajectory causes the movable plate to generate a downward displacement component relative to the machine base. This downward displacement component causes the clamping bending assembly held on the movable plate and the middle part of the clamped terminal to move downward synchronously. When the middle part of the terminal moves downward, the bottom of the terminal directly contacts and is pressed downward by the lifting part of the lifting mechanism. The lifting mechanism only begins to lift after the lifting part abuts against the bottom of the terminal, ensuring that the bottom of the terminal fits against the lifting part during the lifting process, reducing the possibility of the lifting part directly colliding with the bottom of the terminal and causing displacement.

[0010] Optionally, the two opposing clamping portions on both sides of the machine tool width direction are arranged in a 180° rotational symmetry along the axis of the machine tool length direction.

[0011] By adopting the above technical solution, the upper and lower sections of the terminal are at different heights in space, with the left clamping part holding one section and the right clamping part holding the other. When both clamping parts pull outwards simultaneously, the upper and lower terminal sections bear tensile forces at their respective clamped positions, and the points of application of these two tensile forces are located in the same vertical plane. If the two clamping parts are not aligned vertically, with one clamping part at a higher position and the other at a lower position, then the points of force applied when the upper and lower terminal sections are pulled will be misaligned vertically, and the tensile forces borne by the terminals will no longer be symmetrical, resulting in a twisted or skewed final shape of the hairpin wire. Rotational symmetry allows the clamping parts to be positioned on the same vertical plane, avoiding misalignment.

[0012] Optionally, the clamping part includes a reference platform, and a flipping clamp is rotatably provided on the edge of the reference platform away from the center of the machine tool. The side of the flipping clamp that abuts against the reference platform is provided with a clamping channel. The clamping channel is arranged along the length direction of the machine tool. The upper and lower sections of the middle part of the terminal are respectively arranged through the two clamping channels. The reference platform is provided with a flipping drive, and the flipping drive drives the flipping clamp to rotate.

[0013] By adopting the above technical solution, the rotational opening and closing action of the flipping fixture enables rapid clamping and release of the terminal. When the flipping fixture rotates towards and engages with the reference platform, the clamping channel and the upper surface of the reference platform together form a closed clamping space, confining the terminal within this space. The sidewalls of the clamping channel restrict the displacement of the terminal in the width and height directions, preventing the terminal from slipping laterally from the grippers during the stretching process.

[0014] Optionally, the flipping fixture includes a limiting block, which extends and retracts into the clamping channel along the width direction of the machine tool.

[0015] By adopting the above technical solution, when the limiting block extends, it enters the clamping channel from the side, further reducing the effective width of the clamping channel. After the middle of the terminal passes through the clamping channel, the limiting block extends and abuts against the side of the terminal, pressing the terminal against the other side wall of the channel, eliminating the gap between the terminal and the channel wall. The extension and retraction of the limiting block allows the same clamping channel to accommodate terminals with different width tolerances; for narrower terminals, the limiting block extends further; for wider terminals, the limiting block extends less. After the limiting block enters the clamping channel, the terminal cannot move along its width during the stretching process. Simultaneously, the lateral pressure provided by the limiting block increases the friction between the terminal and the clamping channel, further preventing axial slippage.

[0016] Optionally, the clamping and bending assembly includes a translational track, the clamping part is slidably disposed on the translational track, the translational tracks of the two clamping and bending assemblies are arranged in parallel, the translational track is arranged along the length direction of the machine table, a first bidirectional screw and a translational drive are provided on the translational track along the length direction of the machine table, the translational drive drives the first bidirectional screw to rotate, and each clamping and bending assembly has two clamping parts that are respectively threaded to the two ends of the first bidirectional screw with opposite screw directions.

[0017] By adopting the above technical solution, the translational track provides linear motion guidance for the clamping part, allowing the clamping part to adjust its position in the length direction. The two clamping parts on the same side can clamp two different positions of the same segment of the terminal respectively, distributing the tensile force to the two clamping points.

[0018] Optionally, the lifting mechanism includes two lifting components arranged along the width direction of the machine platform. Each lifting component includes a hydraulic cylinder arranged on the machine platform. The output end of the hydraulic cylinder is arranged upward and is provided with a mounting base. The lifting part is arranged on the mounting base.

[0019] By adopting the above technical solution, when the output end of the hydraulic cylinder extends upward, it drives the mounting base and the lifting part to move upward. Compared with the pneumatic cylinder, the hydraulic cylinder can provide greater lifting force and more stable movement speed, making it suitable for bending and shaping copper or aluminum terminals. The lifting part directly contacts the lower surface of the terminal end and pushes it upward, forming the required arc transition. The independence of the two lifting components allows the two hydraulic cylinders to output different lifting heights when the upper and lower terminals require different bending curvatures, achieving asymmetrical bending.

[0020] Optionally, the lower end of the hydraulic cylinder is rotatably connected to the machine base and the rotating shaft is arranged along the width direction of the machine base. A telescopic hydraulic rod is connected to the side of the hydraulic cylinder away from the middle of the machine base, and the other end of the telescopic hydraulic rod is connected to the machine base. The mounting base is rotatably connected to the output end of the hydraulic cylinder. An angle adjustment component is provided between the mounting base and the output end of the hydraulic cylinder. The angle adjustment component is used to adjust the angle between the mounting base and the output end of the hydraulic cylinder.

[0021] By adopting the above technical solution, the angle adjustment of the swing and tilt adjustment components of the telescopic hydraulic rod allows the lifting direction of the lifting part to change freely in space, no longer limited to vertical upward. This enables the lifting part to approach the end of the terminal at any angle, adapting to various bending shape requirements. When the end of the terminal needs to be lifted and simultaneously bent to one side, the tilted lifting direction can directly achieve this effect without the need for an additional lateral shaping mechanism.

[0022] Optionally, the machine tool includes a central platform and two movable platforms disposed on both sides of the central platform. The clamping mechanism is disposed on the central platform, and the lifting mechanism is disposed on the movable platforms. A second bidirectional screw is provided on the central platform. The two ends of the second bidirectional screw with opposite screw directions are respectively threaded to the two movable platforms. One end of the second bidirectional screw is connected to the output end of the platform driving component.

[0023] By adopting the above technical solution, when the platform drive unit drives the second bidirectional screw to rotate, the two moving platforms move closer or further apart under the influence of the second bidirectional screw, thereby adjusting the distance between the two lifting mechanisms to accommodate the bending positions required for terminals of different lengths. This ensures that the fixed positions at both ends of the terminal are always symmetrical about the center of the machine tool, eliminating the need to adjust the positions on both sides separately.

[0024] In summary, this application includes at least one of the following beneficial effects: 1. The two opposing clamping parts on both sides of the machine's width direction are arranged 180° rotationally symmetrically along the machine's length axis. This ensures that when the left and right clamping parts respectively clamp the upper and lower segments of the terminal, their vertical positions correspond to each other, and the points of application of the two tensile forces lie in the same vertical plane. This avoids terminal twisting or skewing caused by misaligned force points, ensures the straightness and symmetry of the hairpin wire shape after the upper and lower segments of the terminal are misaligned outward, and improves forming accuracy.

[0025] 2. At least two sets of parallel swing arms are hinged between the bottom of the movable plate and the machine base, forming a parallelogram linkage mechanism. When the swing drive drives the movable plates to move away from each other, the movable plates move along an arc trajectory and generate a downward displacement component, which drives the middle part of the terminal to move downward synchronously, so that the bottom of the terminal directly contacts the lifting part of the lifting mechanism and is pressed downward.

[0026] 3. The lower end of the hydraulic cylinder is rotatably connected to the machine base, and the telescopic hydraulic rod pushes the hydraulic cylinder to swing. At the same time, the mounting base is rotatably connected to the output end of the hydraulic cylinder and is equipped with an angle adjustment component, so that the lifting direction of the lifting part can be freely tilted and adjusted in space. When the end of the terminal needs to be bent upward and deflected laterally at the same time, the tilted lifting direction can directly achieve this compound action without the need to add a separate lateral shaping mechanism. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a hairpin wire bending and forming device for an electric motor according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the terminal structure in an embodiment of this application.

[0029] Figure 3This is a schematic diagram of the structure of a hairpin wire bending and forming device for an electric motor according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the clamping mechanism in the embodiments of this application.

[0031] Figure 5 This is a schematic diagram of the structure of the fixed gripper in an embodiment of this application.

[0032] Figure 6 This is a partial structural diagram of the clamping and bending component in an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the clamping part in an embodiment of this application.

[0034] Figure 8 This is a partial cross-sectional view of the clamping part in an embodiment of this application.

[0035] Figure 9 This is a side view of the clamping part in an embodiment of this application.

[0036] Figure 10 This is a schematic diagram of the lifting mechanism in the embodiments of this application.

[0037] Explanation of reference numerals in the attached figures: 1. Machine base; 11. Central platform; 12. Moving platform; 13. Second bidirectional screw; 14. Platform drive unit; 2. Fixing mechanism; 21. Bracket; 22. Lifting screw; 23. Lifting drive component; 24. Lifting slider; 25. Telescopic cylinder; 26. Fixed gripper; 261. Base; 262. Fixed gripper; 263. Movable gripper; 264. Fixed cylinder; 265. Connecting rod; 266. Pressing rod; 3. Clamping mechanism; 31. Clamping bending assembly; 311. Translation track; 312. First bidirectional screw; 313. Translation drive component; 314. Height adjustment slide rail; 315. Height adjustment screw; 316. Rotating handle; 32. Clamping part; 3201. Clamping channel; 321. Translation slider; 322. Reference platform; 323. Flipping fixture; 3231. Limiting block; 3232. First elastic element; 3233. Fixing block; 3234. Fixing drive component; 324. Flipping drive component; 3241. Rack; 3242. Gear; 325. Guide block; 326. Guide push block; 327. Second elastic element; 328. Eccentric disc; 33. Movable plate; 331. Swing arm; 332. Swing drive component; 4. Lifting mechanism; 41. Lifting part; 42. Hydraulic cylinder; 43. Mounting base; 431. Fixing screw; 432. Fixing plate; 44. Telescopic hydraulic rod; 45. Tilt adjustment assembly. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0039] This application discloses a device for bending and forming the hairpin wire of an electric motor. (Refer to...) Figure 1 and 2 The system includes: a machine base 1, on which a fixing mechanism 2, a clamping mechanism 3, and a lifting mechanism 4 are provided. The clamping mechanism 3 is located in the center of the machine base 1. The fixing mechanism 2 is provided on both sides of the machine base 1 along its length. The lifting mechanism 4 is provided on both sides of the machine base 1 along its length and is located between the fixing mechanism 2 and the clamping mechanism 3. The fixing mechanism 2 is used to clamp the end of the terminal. The clamping mechanism 3 includes two clamping bending components 31 arranged opposite each other in the width direction of the machine base 1. The clamping bending components 31 have clamping parts 32. The clamping bending components 31 are arranged adjacent to the two fixing mechanisms 2. The clamping parts 32 of the two clamping bending components 31 are arranged close to or far from each other. The two clamping parts 32 are respectively used to clamp the upper and lower sections of the middle part of the terminal. The output end of the lifting mechanism 4 is provided with two lifting parts 41. The two lifting parts 41 are arranged at intervals along the width direction of the machine base 1, corresponding to the upper and lower sections of the middle part of the terminal after being stretched and deformed by the clamping parts 32.

[0040] Fixing mechanism 2 clamps the end of the terminal on both sides along its length, fixing its position. Clamping mechanism 3, with two clamping parts 32 positioned opposite each other along its width, applies a horizontal tensile force to the middle of the terminal, causing the upper and lower sections to shift outwards. Lifting mechanism 4, with two lifting parts 41, pushes the end area upwards after stretching, forming an arc transition. The terminal deforms sequentially on the device, with the end always constrained, the middle shifting first, and the end bending later. Sequential processing of the terminal avoids stress concentration caused by the simultaneous action of tensile and bending forces, resulting in low residual stress inside the terminal and stable springback. Furthermore, the actions of the three mechanisms are automatically controlled by a program, requiring no manual intervention, resulting in a short molding cycle and good consistency in batch products.

[0041] In a preferred embodiment, refer to Figure 3 The machine tool 1 includes a central platform 11 and two movable platforms 12 located on either side of the central platform 11. A clamping mechanism 3 is mounted on the central platform 11, and a lifting mechanism 4 is mounted on the movable platforms 12. A second bidirectional screw 13 is mounted on the central platform 11, with its two ends, each with opposite screw directions, threadedly connected to one of the two movable platforms 12. One end of the second bidirectional screw 13 is connected to the output end of a platform drive component 14. When the platform drive component 14 drives the screw to rotate, the two movable platforms 12 move synchronously in opposite directions with equal displacement. This allows the position of the lifting mechanism 4 to be adjusted simultaneously and remains symmetrical about the center of the machine tool 1, eliminating the need for separate adjustments on both sides.

[0042] In a preferred embodiment, refer to Figure 4Two clamping and bending assemblies 31 are respectively mounted on two movable plates 33. Two sets of parallel swing arms 331 are hinged between the bottom of the movable plates 33 and the central platform 11. A swing drive 332 is mounted on the machine base 1, and the output end of the swing drive 332 is hinged to one of the swing arms 331. Specifically, the swing drive 332 is a cylinder assembly. In this embodiment, the output end of the swing drive 332 is positioned away from the center of the machine base 1. When the swing drive 332 drives the swing arms 331, the movable plates 33 move along an arc trajectory while remaining horizontal. The output end of the drive is positioned away from the center of the machine base 1, causing the arc trajectory to generate a downward displacement component when the movable plates 33 move away from each other, driving the middle part of the terminal downwards, so that the bottom of the terminal contacts the lifting part 41 in advance and is pressed downwards. This preload occurs before the lifting section 41 actively rises, eliminating the lifting travel and avoiding impact collisions during the lifting moment. The bottom of the terminal will not be offset or damaged by the impact.

[0043] In a preferred embodiment, referring to Figures 5, the fixing mechanism 2 includes a bracket 21 vertically mounted on the machine base 1. A lifting screw 22 is vertically mounted on the bracket 21, and a lifting drive component 23 is connected to the upper end of the lifting screw 22. Specifically, the lifting drive component 23 is a motor, and its output end is connected to the lifting screw 22. A lifting slider 24 is threadedly connected to the lifting screw 22, and the lifting slider 24 is slidably connected on the bracket 21. A telescopic cylinder 25 is mounted on the lifting slider 24, and the output end of the telescopic cylinder 25 is oriented towards the center of the machine base 1. A fixed gripper 26 is mounted on the output end of the telescopic cylinder 25. The fixed gripper 26 includes a base 261, and a vertically mounted fixed claw 262 extends from the base 261 towards the center of the machine base 1. A movable claw 263 is hinged to one side of the fixed claw 262, and the movable claw 263 rotates to abut against one side of the fixed claw 262. A fixed cylinder 264 is provided on the base 261 along the width direction of the machine tool 1. A connecting rod 265 is sleeved on the output end of the fixed cylinder 264. The middle part of the connecting rod 265 is rotatably mounted on the base 261. A pressing rod 266 is sleeved on the end of the connecting rod 265 away from the fixed cylinder 264. The pressing rod 266 passes through the movable claw 263 and is fixedly connected to the fixed claw 262. The fixed claw 26, which is raised and lowered, can compensate for displacement during the bending process by following the downward movement trend of the movable plate 33 when it swings, so that the height of the terminal end relative to the movable plate 33 remains unchanged. The fixed cylinder 264 pushes the connecting rod 265 to swing, so that the connecting rod 265 slides on the pressing rod 266 and pushes the movable claw 263 towards the fixed claw 262, thereby reducing the distance between the fixed claw 262 and the movable claw 263 and clamping the terminal. The connecting rod 265 mechanism amplifies the small thrust of the fixed cylinder 264 into a larger clamping force, and at the same time, the clamping force is evenly distributed on the surface of the terminal end, avoiding point contact indentations.

[0044] In a preferred embodiment, refer to Figure 4 The two opposing clamping parts 32 on both sides of the machine base 1 in the width direction are arranged 180° rotationally symmetrically along the length axis of the machine base 1. There is a height difference between the upper and lower sections of the terminal. The clamping parts 32 on both sides clamp the upper and lower ends of the terminal respectively, so that the points of application of the two tensile forces are located in the same vertical plane. The coplanarity of the tensile forces eliminates the additional torque, and the terminal will not twist or misalign due to asymmetrical force. The formed hairpin wire is symmetrical, straight, and without twisting.

[0045] In a preferred embodiment, refer to Figure 4 and 6 The clamping and bending assembly 31 includes a translation rail 311, with clamping parts 32 slidably mounted on the translation rail 311. The translation rails 311 of the two clamping and bending assemblies 31 are arranged parallel to each other, along the length of the machine base 1. A first bidirectional screw 312 and a translation drive 313 are provided on the translation rail 311 along the length of the machine base 1. The translation drive 313 drives the first bidirectional screw 312 to rotate. Two clamping parts 32 are provided on one side of the clamping and bending assembly 31, each including a translation slider 321. The translation sliders 321 of the two clamping parts 32 are respectively threaded to the two ends of the first bidirectional screw 312 with opposite screw directions. When the translation drive 313 drives the screw to rotate, the two clamping parts 32 move simultaneously in opposite directions, clamping two different positions of the same segment of the terminal. The two clamping points are stretched together, dispersing the tension and avoiding the concentration of bending stress caused by single-point clamping.

[0046] In a preferred embodiment, refer to Figure 6 The clamping and bending assembly 31 includes a height-adjusting slide rail 314 vertically mounted on a movable plate 33. A height-adjusting screw 315 is vertically rotatable on the slide rail 314. A rotating handle 316 is connected to the upper end of the height-adjusting screw 315. The height-adjusting screw 315 passes through a translation rail 311 and is threadedly connected to it. When the rotating handle 316 drives the height-adjusting screw 315 to rotate, the translation rail 311 moves up and down along the height-adjusting slide rail 314, thus changing the overall vertical height of the clamping part 32. The threaded engagement has a self-locking characteristic, preventing slippage due to vibration after adjustment. The arrangement of the height-adjusting slide rail 314 and the height-adjusting screw 315 allows the clamping part 32 to adapt to workpieces with different cross-sectional thicknesses or different terminal segment spacings.

[0047] In a preferred embodiment, refer to Figure 7The clamping part 32 includes a reference platform 322, which is connected to the translation slider 321. A flipping clamp 323 is rotatably mounted on the edge of the reference platform 322 away from the center of the machine tool 1. A clamping channel 3201 is recessed on the side of the flipping clamp 323 that abuts against the reference platform 322. The clamping channel 3201 is arranged along the length of the machine tool 1. The upper and lower sections of the terminal are respectively disposed through two clamping channels 3201. The reference platform 322 is provided with a flipping drive 324, which drives the flipping clamp 323 to rotate. Specifically, the flipping drive 324 is a cylinder assembly, and its output end is a rack 3241. The rack 3241 is meshed with a gear 3242, and the shaft of the gear 3242 is coaxially connected to the shaft of the flipping clamp 323. When the flipping fixture 323 rotates towards and engages with the reference platform 322, the clamping channel 3201 and the upper surface of the reference platform 322 together form a closed space, confining the center of the terminal within it. The sidewalls of the channel constrain the displacement of the terminal in the width and height directions, preventing lateral slippage during stretching. The flipping drive 324 uses a rack and pinion 3241 and a gear 3242 for transmission, converting the linear motion of the rack and pinion 3241 into the rotational motion of the flipping fixture 323. This results in small transmission backlash, precise angle control, and the ability to achieve large-angle flipping within a limited space, facilitating terminal insertion and removal.

[0048] In a preferred embodiment, refer to Figure 7 and 8 The flipping fixture 323 includes a limiting block 3231, which extends and retracts along the width of the machine tool 1 into the clamping channel 3201. Specifically, the limiting block 3231 is connected to a first elastic element 3232, which is a spring in this embodiment. The flipping fixture 323 has a receiving space for the spring, and the limiting block 3231 is slidably disposed within the receiving space. The two ends of the spring abut against the limiting block 3231 and the flipping fixture 323 respectively, applying elastic force to the limiting block 3231 in the direction of the clamping channel 3201. When the flipping fixture 323 is opened to insert a terminal, it can squeeze the limiting block 3231. After the flipping fixture 323 is closed, the limiting block 3231 will continuously apply pressure to the terminal, pressing the terminal against the other side wall of the clamping channel. The elastic limiting provides sufficient lateral restraint to prevent slippage without scratching the terminal surface due to over-rigid positioning.

[0049] In a preferred embodiment, refer to Figure 7 and 9The flipping fixture 323 also includes a fixing block 3233, which extends and retracts vertically into the clamping channel 3201. The fixing block 3233 is located on the side of the flipping fixture 323 facing away from the reference platform 322, and is connected to a fixing drive member 3234. In this embodiment, the fixing drive member 3234 is a cylinder assembly. A limiting block 3231 has a recessed clearance groove on its side facing the fixing block 3233, and the clearance groove is configured to match the shape of the fixing block 3233. Because the limiting block 3231 has a recessed clearance groove on its side facing the fixing block 3233, the fixing block 3233 can pass through the plane of the limiting block 3231 without interference when it extends downwards. The fixing block 3233 presses the terminal vertically, forming an orthogonal bidirectional constraint with the lateral pressing of the limiting block 3231, further restricting the degree of freedom of the terminal.

[0050] In a preferred embodiment, refer to Figure 6 and 7 The reference platform 322 extends towards the lifting mechanism 4. A guide block 325 is provided on the side of the flipping fixture 323 near the center of the machine base 1 and close to the lifting mechanism 4. The guide block 325 is located on the side of the clamping channel 3201 facing the lifting mechanism 4, and the side of the guide block 325 near the opening of the clamping channel 3201 is an arc surface. The arc surface of the guide block 325 provides guidance and protection to the inner side of the terminal when it is stretched and deformed to both sides, preventing the terminal from being subjected to force and causing friction and scratches with the sharp corners of the flipping fixture 323, thus preventing the formation of easily worn and broken corners.

[0051] In a preferred embodiment, refer to Figure 7 The flipping fixture 323 is provided with a guide push block 326, which is positioned on one side of the flipping fixture 323 corresponding to the guide block 325. A second elastic element 327 is provided on the side of the guide push block 326 away from the guide block 325. In this embodiment, the second elastic element 327 is a spring, and its other end is connected to the flipping fixture 323. Both the guide push block 326 and the limiting block 3231 have oblong holes extending along the length of the machine base 1. A pin passes through the oblong hole, with both ends of the pin protruding from the guide push block 326 and the limiting block 3231 respectively, and each end has a pin head. The pin binds the guide push block 326 and the limiting block 3231 together, so that the guide push block 326 will not detach from the limiting block 3231. Under the action of the second elastic member 327, the guide push block 326 continues to push towards the guide block 325. During the process of the terminal being stretched, a pushing force is continuously applied to the terminal. When the terminal starts to bend from straight, it is easy to deviate during the initial deformation and not fit the guide block 325, resulting in the bending position of the terminal not coinciding with the predetermined position.

[0052] In a preferred embodiment, refer to Figure 6 and 9The flipping clamp 323 has a rotating eccentric disc 328 on the side opposite to the lifting mechanism 4. The rotating shaft of the eccentric disc 328 is connected to a rotating motor installed in the flipping clamp 323. The rotating shaft of the eccentric disc 328 is eccentrically positioned, and the periphery of the eccentric disc 328 is positioned at the opening of the clamping channel 3201. When rotating, the eccentric disc 328 partially blocks the opening of the clamping channel 3201. When the motor drives the eccentric disc 328 to rotate, the amount of obstruction at the channel opening changes with the angle due to the eccentricity of the rotating shaft. When clamping is required, after the clamping part 32 clamps the terminal, the rotating motor drives the eccentric disc 328 to rotate to the obstruction position to partially obstruct the clamping channel 3201, applying pre-pressure to the terminal. After lifting is completed, the eccentric disc 328 rotates back to the initial position, releasing the terminal.

[0053] In a preferred embodiment, refer to Figure 10 The lifting mechanism 4 includes two lifting components arranged along the width direction of the machine base 1. Each lifting component includes a hydraulic cylinder 42 mounted on the machine base 1. The output end of the hydraulic cylinder 42 faces upward and is provided with a mounting base 43. A lifting part 41 is mounted on the mounting base 43. In this embodiment, the lifting part 41 is a block of wood formed by stacking multiple identical wooden boards, with the upper end of each board having an arc surface. A fixing screw 431 is provided on the mounting base 43, and a fixing plate 432 passes through the fixing screw 431. The fixing plate 432 presses the wooden board tightly onto the fixing base, and bolts are used to lock the fixing plate 432 onto the fixing screw 431. The upper ends of two adjacent lifting parts 41 are corresponding to two clamping parts 32. The flipping clamp 323 of the clamping part 32 is located on the upper side of the lifting part 41, which is higher than the flipping clamp 323 of the clamping part 32 located on the lower side. This is because the flip clamp 323 is located in the upper clamping part 32 to clamp the upper section of the terminal, and the flip clamp 323 is located in the lower clamping part 32 to clamp the lower section of the terminal. The two clamping parts 32 descend at the same angle, so the height of the two lifting parts 41 has the height difference between the upper and lower sections of the terminal. The wooden board has a certain degree of elasticity, and the contact between the wooden board and the terminal is non-rigid, so it is not easy to damage the surface. The fixing screw 431, fixing plate 432, and bolts press the wooden board together to prevent it from falling. The height difference between the two lifting parts 41 is equal to the height difference between the upper and lower sections of the terminal. Because the two clamping parts 32 descend at the same angle, the preset height difference allows the two lifting parts 41 to contact the bottom of the upper and lower sections at the same time, achieving synchronous lifting and avoiding uneven bending caused by one end lifting first and the other end being suspended. After the wooden board stacking structure wears out, only a single wooden board needs to be replaced, resulting in extremely low cost.

[0054] In a preferred embodiment, refer to Figure 10The lower end of the hydraulic cylinder 42 is rotatably connected to the machine base 1, and the rotating shaft is set along the width direction of the machine base 1. A telescopic hydraulic rod 44 is connected to the side of the hydraulic cylinder 42 away from the middle of the machine base 1. The other end of the telescopic hydraulic rod 44 is connected to the machine base 1, and the two ends of the telescopic hydraulic rod 44 are connected by a universal joint. The mounting base 43 is rotatably connected to the output end of the hydraulic cylinder 42 near the center of the machine base 1. An angle adjustment component 45 is provided between the mounting base 43 and the output end of the hydraulic cylinder 42. The angle adjustment component 45 is used to adjust the angle between the mounting base 43 and the output end of the hydraulic cylinder 42. In this embodiment, the angle adjustment component 45 is a combination of a screw and a bolt set at the bottom of the mounting base 43. The screw passes through the plate at the output end of the hydraulic cylinder 42, and the bolt is set at the bottom of the plate and threadedly connected to the screw. By rotating the bolt to adjust the length of the screw above the plate, the angle of the mounting base 43 relative to the plate is changed.

[0055] The lower end of the hydraulic cylinder 42 is rotatably connected to the machine base 1, and the telescopic hydraulic rod 44 connects the middle of the hydraulic cylinder 42 to the machine base 1. The telescopic hydraulic rod 44 stabilizes the hydraulic cylinder 42. When the moving platform 12 begins to move, if the hydraulic cylinder 42 shows a tendency to swing, the force of stretching or compressing the telescopic hydraulic rod 44 must be overcome first, thus making the angle change of the hydraulic cylinder 42 relative to the moving platform 12 relatively slow during the movement. The mounting base 43 is rotatably connected to the side of the hydraulic cylinder 42 output end near the center of the machine base 1, and the tilt angle adjustment component 45 adjusts the angle between the mounting base 43 and the output end. Rotating the bolt changes the extension length of the screw, thereby adjusting the tilt angle of the mounting base 43 relative to the output end plate. Through swinging and tilt angle adjustment, the lifting direction can be freely changed in space.

[0056] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for bending and forming the hairpin wire of an electric motor, characterized in that, include: Fixing mechanism (2), which is provided on both sides of the machine base (1) along its length, is used to clamp the end of the terminal; A clamping mechanism (3) is disposed between two fixed mechanisms (2). The clamping mechanism (3) includes two clamping bending components (31) disposed opposite to each other in the width direction of the machine tool (1). Each clamping bending component (31) has a clamping part (32). The clamping bending components (31) are disposed adjacent to the two fixed mechanisms (2). The clamping parts (32) of the two clamping bending components (31) are disposed close to or far from each other. The two clamping parts (32) are respectively used to clamp the upper and lower sections of the middle part of the terminal. Lifting mechanism (4), two lifting mechanisms (4) are provided, the two lifting mechanisms (4) are provided on both sides of the machine platform (1) and located between the clamping mechanism (3) and the fixing mechanism (2). The output end of the lifting mechanism (4) is provided with two lifting parts (41) spaced apart along the width direction of the machine platform (1). The lifting parts (41) are raised and lowered.

2. The hairpin wire bending and forming device for an electric motor according to claim 1, characterized in that: The two clamping and bending components (31) are respectively disposed on two movable plates (33), which are movably disposed on the machine base (1), and the two movable plates (33) are disposed close to or far from each other.

3. The hairpin wire bending and forming device for an electric motor according to claim 2, characterized in that: At least two sets of parallel swing arms (331) are hinged between the bottom of the movable plate (33) and the machine base (1). The machine base (1) is provided with a swing drive (332), and the output end of the swing drive (332) is hinged to one of the sets of swing arms (331).

4. The hairpin wire bending and forming device for an electric motor according to claim 1, characterized in that: The two clamping parts (32) on opposite sides of the width direction of the machine base (1) are arranged symmetrically at 180° along the axis of the length direction of the machine base (1).

5. The hairpin wire bending and forming device for an electric motor according to claim 4, characterized in that: The clamping part (32) includes a reference platform (322). The reference platform (322) is provided with a flipping clamp (323) on one side edge away from the center of the machine tool (1). The flipping clamp (323) is provided with a clamping channel (3201) on the side that abuts against the reference platform (322). The clamping channel (3201) is arranged along the length direction of the machine tool (1). The upper and lower sections of the middle part of the terminal are respectively arranged through the two clamping channels (3201). The reference platform (322) is provided with a flipping drive (324). The flipping drive (324) drives the flipping clamp (323) to rotate.

6. The hairpin wire bending and forming device for an electric motor according to claim 5, characterized in that: The flipping fixture (323) includes a limiting block (3231), which extends and retracts into the clamping channel (3201) along the width direction of the machine tool (1).

7. The hairpin wire bending and forming device for an electric motor according to claim 4, characterized in that: The clamping and bending assembly (31) includes a translation rail (311), and the clamping part (32) is slidably disposed on the translation rail (311). The translation rails (311) of the two clamping and bending assemblies (31) are arranged in parallel. The translation rail (311) is arranged along the length direction of the machine table (1). A first bidirectional screw (312) and a translation drive (313) are provided on the translation rail (311) along the length direction of the machine table (1). The translation drive (313) drives the first bidirectional screw (312) to rotate. Each clamping and bending assembly (31) has two clamping parts (32) that are respectively threaded to the two ends of the first bidirectional screw (312) with opposite screw directions.

8. The hairpin wire bending and forming device for an electric motor according to claim 1, characterized in that: The lifting mechanism (4) includes two lifting components arranged along the width direction of the machine base (1). The lifting components include a hydraulic cylinder (42) arranged on the machine base (1). The output end of the hydraulic cylinder (42) is arranged upward and is provided with a mounting base (43). The lifting part (41) is arranged on the mounting base (43).

9. The hairpin wire bending and forming device for an electric motor according to claim 8, characterized in that: The lower end of the hydraulic cylinder (42) is rotatably connected to the machine base (1), and the rotating shaft is set along the width direction of the machine base (1). A telescopic hydraulic rod (44) is connected to the side of the hydraulic cylinder (42) away from the middle of the machine base (1). The other end of the telescopic hydraulic rod (44) is connected to the machine base (1). The mounting base (43) is rotatably connected to the output end of the hydraulic cylinder (42). An angle adjustment component (45) is provided between the mounting base (43) and the output end of the hydraulic cylinder (42). The angle adjustment component (45) is used to adjust the angle between the mounting base (43) and the output end of the hydraulic cylinder (42).

10. The hairpin wire bending and forming device for an electric motor according to claim 1, characterized in that: The machine tool (1) includes a central platform (11) and two movable platforms (12) arranged on both sides of the central platform (11). The clamping mechanism (3) is arranged on the central platform (11), and the lifting mechanism (4) is arranged on the movable platforms (12). The central platform (11) is provided with a second bidirectional screw (13). The two ends of the second bidirectional screw (13) with opposite screw directions are respectively threaded to the two movable platforms (12). One end of the second bidirectional screw (13) is connected to the output end of the platform driving component (14).

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