Thread end clamping device for stator winding welding

Abstract

The utility model discloses a thread end clamping device for stator winding welding. The thread end clamping device comprises a base, a clamping driving mechanism, a plurality of first chucks and a plurality of second chucks, wherein the first chucks are sequentially arranged in the circumferential direction of the base; the second chucks are sequentially arranged in the circumferential direction of the base; wherein the end portion of the stator winding is provided with a plurality of wire ends to be welded, the first chuck is slidably connected to the base in the radial direction of the base, and the first chuck is provided with an outer protruding portion which extends downwards and is used for abutting against the outer side wall of the corresponding wire end. The second clamping head is slidably connected to the base in the radial direction of the base, the second clamping head is provided with an inner protruding part which extends downwards and is used for abutting against the inner side wall of the corresponding thread end, and a clamping space for the corresponding thread end to stretch into is arranged between the inner protruding part and the corresponding outer protruding part. The clamping device can be used for clamping the wire end of the X-Pin structure, and the wire end of the X-Pin structure can be welded more conveniently.

Description

Technical Field

[0001] The utility model relates to a wire head clamping device for stator winding welding. Background Art

[0002] At present, in the stator assembly of a flat wire motor, there is a stator core and a stator winding connected to the stator core. The end of the stator winding has wire heads that need to be welded. The structures of the wire heads include I-pin, Hair-pin, and X-pin, etc. Compared with I-pin and Hair-pin, the wire head with X-pin structure has no straight segment, so it is shorter in length, which is beneficial to reducing the overall length dimension of the motor, saving the usage of flat wire, improving the motor efficiency, and realizing the miniaturization of the motor. Therefore, the wire head with X-pin structure is more and more widely used in the industry.

[0003] When welding the wire head, a fixture is needed to clamp the wire head, but the existing fixtures cannot clamp the wire head with X-pin structure. For example, a Chinese patent with the publication number CN217452650U discloses an integral fixture for laser welding of hairpin flat wires of a new energy vehicle motor. In this fixture, the straight segment on the wire head needs to extend into the first positioning groove and the second positioning groove to clamp the wire head. However, the wire head with X-Pin structure has no straight segment, so many existing fixtures cannot be used to clamp the wire head with X-Pin structure, which will lead to inconvenient welding of the wire head with X-Pin structure. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a wire head clamping device for stator winding welding, which can be used to clamp the wire head with X-Pin structure and make the welding of the wire head with X-Pin structure more convenient.

[0005] To solve the above technical problem, the technical solution of the utility model is: a wire head clamping device for stator winding welding, including a base, a clamping driving mechanism, a plurality of first clamping heads arranged in sequence along the circumference of the base, and a plurality of second clamping heads arranged in sequence along the circumference of the base;

[0006] The end of the stator winding has a plurality of wire heads to be welded;

[0007] The first clamping head is slidably connected to the base along the radial direction of the base, and the first clamping head is provided with an outer convex part extending downward and used for abutting against the outer side wall of the corresponding wire head;

[0008] The second chuck is slidably connected to the base along the radial direction of the base. An inner convex portion that extends downward and is used to abut against the inner side wall of the corresponding wire head is provided on the second chuck. A clamping space for the corresponding wire head to extend into is provided between the inner convex portion and the corresponding outer convex portion;

[0009] The clamping driving mechanism is connected to the first chuck and is used to drive the first chuck to move radially so that the outer convex portion abuts against the outer side wall of the corresponding wire head. The clamping driving mechanism is also connected to the second chuck and is used to drive the second chuck to move radially so that the inner convex portion abuts against the inner side wall of the corresponding wire head, thereby clamping the corresponding wire head by the outer convex portion and the inner convex portion.

[0010] A specific structure of the clamping driving mechanism is further provided. The clamping driving mechanism includes a first driving disk, a second driving disk and a driving component;

[0011] The first driving disk is rotatably connected to the base. A plurality of first driving grooves are provided in the first driving disk and are distributed in sequence along the circumferential direction;

[0012] A first driving pin is connected to the first chuck. The first driving pin is fitted in the corresponding first driving groove so that when the first driving disk rotates, the first driving pin and the first chuck are driven to move radially through the first driving groove;

[0013] The second driving disk is rotatably connected to the base. A plurality of second driving grooves are provided in the second driving disk and are distributed in sequence along the circumferential direction;

[0014] A second driving pin is connected to the second chuck. The second driving pin is fitted in the corresponding second driving groove so that when the second driving disk rotates, the second driving pin and the second chuck are driven to move radially through the second driving groove;

[0015] The first driving disk and the second driving disk are used to rotate in the same circumferential direction to drive the first chuck and the second chuck to move in the same radial direction along the base so as to adjust the positions of the first chuck and the second chuck in the radial direction;

[0016] The driving component is respectively connected to the first driving disk and the second driving disk. The driving component is used to drive the first driving disk and the second driving disk to rotate in opposite directions to drive the first chuck and the second chuck to move in opposite radial directions along the base so as to clamp or loosen the wire head.

[0017] A specific structure of the driving component is further provided. The driving component includes a first driving block, a second driving block and a driving screw;

[0018] The first driving block is rotatably connected to the first driving disk, and the second driving block is rotatably connected to the second driving disk;

[0019] One end of the driving screw is provided with a first thread portion, and the other end of the driving screw is provided with a second thread portion having a thread direction opposite to that of the first thread portion;

[0020] The first thread portion is threadedly connected to the first driving block, and the second thread portion is threadedly connected to the second driving block.

[0021] Furthermore, a first protruding portion is provided on the first driving disk, a second protruding portion is provided on the second driving disk, the first driving block is rotatably connected to the first protruding portion, and the second driving block is rotatably connected to the second protruding portion.

[0022] Furthermore, a first sliding groove corresponding to the first chuck one by one is provided in the base, and the first chuck is slidably arranged in the corresponding first sliding groove in the radial direction;

[0023] A second sliding groove corresponding to the second chuck one by one is further provided in the base, and the second chuck is slidably arranged in the corresponding second sliding groove in the radial direction.

[0024] Furthermore, a specific structure of the base is provided. The base includes a base body, a first cover plate and a second cover plate;

[0025] The base body includes a main body portion, a first convex ring portion connected to the outer peripheral portion of the main body portion and protruding upward, and a second convex ring portion connected to the outer peripheral portion of the main body portion and protruding downward;

[0026] The first sliding grooves are arranged on the upper end surface of the main body portion and are distributed in sequence along the circumferential direction, and the first chucks are slidably arranged in the corresponding first sliding grooves in the radial direction;

[0027] The second sliding grooves are arranged on the lower end surface of the main body portion and are distributed in sequence along the circumferential direction, and the second chucks are slidably arranged in the corresponding second sliding grooves in the radial direction;

[0028] The first driving disk is rotatably arranged inside the first convex ring portion and above the main body portion so that the first driving disk restricts the first chuck in the corresponding first sliding groove, and the outer side wall of the first driving disk is in contact and cooperation with the inner side wall of the first convex ring portion;

[0029] The second driving disk is rotatably arranged inside the second convex ring portion and below the main body portion so that the second driving disk restricts the second chuck in the corresponding second sliding groove, and the outer side wall of the second driving disk is in contact and cooperation with the inner side wall of the second convex ring portion;

[0030] The first cover plate is connected to the first convex ring portion, and the inner peripheral portion of the first cover plate is in contact and cooperation with the upper surface of the first driving disk to limit the first driving disk on the seat body;

[0031] The second cover plate is connected to the second convex ring portion, and the inner peripheral portion of the second cover plate is in contact and cooperation with the lower surface of the second driving disk to limit the second driving disk on the seat body;

[0032] A through hole is provided at the center of the main body portion, and both the outer convex portion and the inner convex portion are located in the through hole.

[0033] Furthermore, the stator winding is connected to the stator core, and a positioning and mating mechanism for assembling and connecting with the stator core is connected to the base. When the positioning and mating mechanism is assembled in place with the stator core, the wire end extends into the clamping space between the corresponding outer convex portion and the corresponding inner convex portion.

[0034] Furthermore, a specific structure of the positioning and mating mechanism is provided. The positioning and mating mechanism includes a plurality of positioning blocks connected to the base and arranged in sequence along the circumferential direction. The positioning block is provided with a positioning step portion for abutting against the end face of the stator core and a positioning abutting portion for abutting against the outer side wall of the stator core.

[0035] Furthermore, a specific structure of the first chuck and the second chuck is provided. The first chuck includes a first slider and a first clamping block; wherein, the first slider is slidably connected to the base along the radial direction of the base, the first clamping block is connected to one end of the first slider close to the center of the base, and the outer convex portion is arranged on the first clamping block;

[0036] The second chuck includes a second slider and a second clamping block; wherein, the second slider is slidably connected to the base along the radial direction of the base, the second clamping block is connected to one end of the second slider close to the center of the base, and the inner convex portion is arranged on the second clamping block.

[0037] Furthermore, a specific structure of the inner convex portion is provided. The inner convex portion includes a vertical extension portion connected to the second clamping block and extending downward, and a horizontal extension portion connected to the vertical extension portion and used for abutting against the inner side wall of the corresponding wire end.

[0038] After adopting the above technical solution, the wire ends on the stator winding adopt an X-Pin structure, and there is no straight section extending upward at the end of the wire end of the X-Pin structure. Among them, both the outer convex part and the inner convex part extend downward. When the base is assembled in place with the stator core, the outer convex part can extend downward to the outside of the wire end and the inner convex part can extend downward to the inside of the wire end. At this time, the wire end is located in the clamping space between the corresponding outer convex part and the corresponding inner convex part. Then, the clamping driving mechanism is used to drive the first chuck to move radially inward and drive the second chuck to move radially outward, so that the outer convex part on the first chuck abuts against the outer side wall of the corresponding wire end and the inner convex part on the second chuck abuts against the inner side wall of the corresponding wire end, so that the outer convex part and the inner convex part clamp the corresponding wire end. Therefore, by providing the downward-extending outer convex part and the downward-extending inner convex part, the wire end of the X-Pin structure without a straight section can be clamped. Clamping the wire end of the X-Pin structure first and then welding it can make the welding of the wire end of the X-Pin structure more convenient. Description of the Drawings

[0039] Figure 1 Schematic structural diagram of the wire end clamping device for stator winding welding of the present invention installed on the stator core;

[0040] Figure 2 Stereogram of the wire end clamping device for stator winding welding of the present invention;

[0041] Figure 3 Cross-sectional view of the wire end clamping device for stator winding welding of the present invention;

[0042] Figure 4 Exploded assembly view of the wire end clamping device for stator winding welding of the present invention;

[0043] Figure 5 Schematic structural diagram of the first chuck and the second chuck of the present invention;

[0044] Figure 6 Schematic structural diagram of the first chuck slidably fitted on the seat body of the present invention;

[0045] Figure 7 Top view of the assembly connection of the first driving disc, the first chuck and the seat body of the present invention;

[0046] Figure 8 Schematic structural diagram of the second chuck slidably fitted on the seat body of the present invention;

[0047] Figure 9 Bottom view of the assembly connection of the second driving disc, the second chuck and the seat body of the present invention. Detailed implementation mode

[0048] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the accompanying drawings.

[0049] As Figures 1 to 9 shown, a wire clamping device for stator winding welding, wherein, the end of the stator winding 100 has a plurality of wires 1 to be welded, and the wire clamping device for stator winding welding includes:

[0050] A base 2;

[0051] A plurality of first chucks 3 arranged in sequence along the circumferential direction of the base 2, the first chucks 3 are slidably connected to the base 2 along the radial direction of the base 2, and an outer convex portion 4 extending downward and used for abutting against the outer side wall of the corresponding wire 1 is arranged on the first chucks 3;

[0052] A plurality of second chucks 5 arranged in sequence along the circumferential direction of the base 2, the second chucks 5 are slidably connected to the base 2 along the radial direction of the base 2, and an inner convex portion 6 extending downward and used for abutting against the inner side wall of the corresponding wire 1 is arranged on the second chucks 5, and a clamping space 7 for the corresponding wire 1 to extend into is arranged between the inner convex portion 6 and the corresponding outer convex portion 4;

[0053] A clamping driving mechanism, the clamping driving mechanism is connected to the first chuck 3 and used for driving the first chuck 3 to move radially so that the outer convex portion 4 abuts against the outer side wall of the corresponding wire 1, the clamping driving mechanism is also connected to the second chuck 5 and used for driving the second chuck 5 to move radially so that the inner convex portion 6 abuts against the inner side wall of the corresponding wire 1, and further clamping the corresponding wire 1 by the outer convex portion 4 and the inner convex portion 6.

[0054] Specifically, the wire 1 on the stator winding 100 adopts an X-Pin structure, and the wire 1 with the X-Pin structure is as Figure 5As shown, there is no straight line segment extending upward at the end of the wire head 1. In this embodiment, both the outer convex portion 4 and the inner convex portion 6 extend downward. When the base 2 is assembled in place with the stator core 200, the outer convex portion 4 can extend downward to the outside of the wire head 1 and the inner convex portion 6 can extend downward to the inside of the wire head 1. At this time, the wire head 1 is located in the clamping space 7 between the corresponding outer convex portion 4 and the corresponding inner convex portion 6. Then, the clamping drive mechanism is used to drive the first chuck 3 to move radially inward and drive the second chuck 5 to move radially outward, so that the outer convex portion 4 on the first chuck 3 abuts against the outer side wall of the corresponding wire head 1 and the inner convex portion 6 on the second chuck 5 abuts against the inner side wall of the corresponding wire head 1, so that the outer convex portion 4 and the inner convex portion 6 clamp the corresponding wire head 1. Therefore, by providing the downward-extending outer convex portion 4 and the downward-extending inner convex portion 6, the wire head 1 of the X-Pin structure without a straight line segment can be clamped. Clamping the wire head 1 of the X-Pin structure first and then welding it can make the welding of the wire head 1 of the X-Pin structure more convenient.

[0055] In this embodiment, the number of the first chucks 3 is equal to the number of the second chucks 5, and the outer convex portions 4 on the first chucks 3 correspond to the inner convex portions 6 on the second chucks 5 one by one. Specifically, at least two turns of the wire heads 1 are provided on the stator winding 100, and the number of the wire heads 1 in each turn respectively corresponds to the first chuck 3 and the second chuck 5 one by one.

[0056] As Figure 5 shown, the wire head 1 to be welded is formed by the ends of two flat copper wires abutting against each other.

[0057] As Figures 1 to 9 shown, the clamping drive mechanism is, for example but not limited to, the following structure. It includes a first drive disk 8, a second drive disk 9 and a drive assembly;

[0058] The first drive disk 8 is rotatably connected to the base 2, and a plurality of first drive grooves 10 are provided in the first drive disk 8 and are sequentially distributed in the circumferential direction;

[0059] A first drive pin 11 is connected to the first chuck 3, and the first drive pin 11 is fitted in the corresponding first drive groove 10 so that when the first drive disk 8 rotates, the first drive pin 11 and the first chuck 3 are driven to move radially through the first drive groove 10;

[0060] The second drive disk 9 is rotatably connected to the base 2, and a plurality of second drive grooves 12 are provided in the second drive disk 9 and are sequentially distributed in the circumferential direction;

[0061] A second drive pin 13 is connected to the second chuck 5, and the second drive pin 13 is engaged in a corresponding second drive groove 12 so that when the second drive disk 9 rotates, the second drive pin 13 and the second chuck 5 are driven to move radially along the second drive groove 12;

[0062] The first drive disk 8 and the second drive disk 9 are used to rotate in the same circumferential direction, thereby driving the first chuck 3 and the second chuck 5 to move in the same radial direction along the base 2 so as to adjust the radial positions of the first chuck 3 and the second chuck 5;

[0063] The drive assembly is respectively connected to the first drive disk 8 and the second drive disk 9, and the drive assembly is used to drive the first drive disk 8 and the second drive disk 9 to rotate in opposite directions, thereby driving the first chuck 3 and the second chuck 5 to move in opposite radial directions along the base 2 so as to clamp or release the wire head 1; in this embodiment, the number of the first chucks 3 is twice that of the first drive grooves 10, so two first drive pins 11 are engaged in each first drive groove 10; the number of the second chucks 5 is twice that of the second drive grooves 12, so two second drive pins 13 are engaged in each second drive groove 12.

[0064] As Figures 1 to 4 shown, the drive assembly may include a first drive block 14, a second drive block 15 and a drive screw 16;

[0065] The first drive block 14 is rotatably connected to the first drive disk 8, and the second drive block 15 is rotatably connected to the second drive disk 9;

[0066] One end of the drive screw 16 is provided with a first thread portion, and the other end of the drive screw 16 is provided with a second thread portion having a thread direction opposite to that of the first thread portion;

[0067] The first thread portion is threadedly connected to the first drive block 14, and the second thread portion is threadedly connected to the second drive block 15; specifically, by rotating the drive screw 16, the first drive block 14 and the second drive block 15 can be driven to move towards or away from each other, thereby driving the first drive disk 8 and the second drive disk 9 to rotate in opposite directions, and further driving the first chuck 3 and the second chuck 5 to move in opposite radial directions along the base 2 so as to clamp or release the wire head 1.

[0068] As Figure 1 、 2As shown in FIGS. 3, 4, 7, and 9, a first protruding portion 17 is provided on the first driving disk 8, and a second protruding portion 18 is provided on the second driving disk 9. The first driving block 14 is rotatably connected to the first protruding portion 17, and the second driving block 15 is rotatably connected to the second protruding portion 18. In this embodiment, a handle 19 is connected to at least one of the first protruding portion 17 and the second protruding portion 18. Wherein, when the driving screw 16 remains stationary, the first driving disk 8 and the second driving disk 9 remain relatively stationary. At this time, the first driving disk 8 and the second driving disk 9 are driven to rotate in the same circumferential direction by the handle 19.

[0069] Specifically, when it is necessary to clamp the wire head 1 of the first inner circle, the first driving disk 8 and the second driving disk 9 are driven to rotate in the same direction by the handle 19, so as to drive the first clamping head 3 and the second clamping head 5 to move inward in the same radial direction along the base 2, so that the clamping space 7 between the inner convex portion 6 and the outer convex portion 4 is aligned with the wire head 1 of the first inner circle. Then, the base 2 is assembled onto the stator core 200. At this time, the wire head 1 of the first inner circle extends into the clamping space 7 between the inner convex portion 6 and the outer convex portion 4. Then, the first driving disk 8 and the second driving disk 9 are driven to rotate in the opposite direction by the driving assembly, so as to drive the first clamping head 3 and the second clamping head 5 to move in the opposite radial direction along the base 2, so as to clamp the wire head 1 of the first inner circle by the outer convex portion 4 and the inner convex portion 6. Similarly, when it is necessary to clamp the wire head 1 of the second inner circle, the first driving disk 8 and the second driving disk 9 are driven to rotate in the same direction by the handle 19, so as to drive the first clamping head 3 and the second clamping head 5 to move outward in the same radial direction along the base 2, so that the clamping space 7 between the inner convex portion 6 and the outer convex portion 4 is aligned with the wire head 1 of the second inner circle. Then, the base 2 is assembled onto the stator core 200. At this time, the wire head 1 of the second inner circle extends into the clamping space 7 between the inner convex portion 6 and the outer convex portion 4. Then, the first driving disk 8 and the second driving disk 9 are driven to rotate in the opposite direction by the driving assembly, so as to drive the first clamping head 3 and the second clamping head 5 to move in the opposite radial direction along the base 2, so as to clamp the wire head 1 of the second inner circle by the outer convex portion 4 and the inner convex portion 6. In the above manner, each turn of the wire head 1 can be clamped separately, so as to perform welding after clamping each turn of the wire head 1.

[0070] As Figures 1 to 9 shown, a first sliding groove 20 corresponding to the first clamping head 3 is provided in the base 2, and the first clamping head 3 is slidably arranged in the corresponding first sliding groove 20 in the radial direction.

[0071] The base 2 is further provided with second sliding grooves 21 corresponding to the second chucks 5 one by one, and the second chucks 5 are slidably arranged in the corresponding second sliding grooves 21 in the radial direction.

[0072] As Figures 1 to 9 shown, the base 2 may include a base body 22, a first cover plate 23 and a second cover plate 24;

[0073] The base body 22 includes a main body portion 25, a first convex ring portion 26 connected to the outer peripheral portion of the main body portion 25 and protruding upward, and a second convex ring portion 27 connected to the outer peripheral portion of the main body portion 25 and protruding downward;

[0074] The first sliding grooves 20 are arranged on the upper end surface of the main body portion 25 and are distributed in sequence along the circumferential direction, and the first chucks 3 are slidably arranged in the corresponding first sliding grooves 20 in the radial direction;

[0075] The second sliding grooves 21 are arranged on the lower end surface of the main body portion 25 and are distributed in sequence along the circumferential direction, and the second chucks 5 are slidably arranged in the corresponding second sliding grooves 21 in the radial direction;

[0076] The first driving disk 8 is rotatably arranged inside the first convex ring portion 26 and above the main body portion 25 so that the first driving disk 8 restricts the first chuck 3 in the corresponding first sliding groove 20, and the outer side wall of the first driving disk 8 is in contact and cooperation with the inner side wall of the first convex ring portion 26;

[0077] The second driving disk 9 is rotatably arranged inside the second convex ring portion 27 and below the main body portion 25 so that the second driving disk 9 restricts the second chuck 5 in the corresponding second sliding groove 21, and the outer side wall of the second driving disk 9 is in contact and cooperation with the inner side wall of the second convex ring portion 27;

[0078] The first cover plate 23 is connected to the first convex ring portion 26, and the inner peripheral portion of the first cover plate 23 is in contact and cooperation with the upper surface of the first driving disk 8 to restrict the first driving disk 8 on the base body 22;

[0079] The second cover plate 24 is connected to the second convex ring portion 27, and the inner peripheral portion of the second cover plate 24 is in contact and cooperation with the lower surface of the second driving disk 9 to restrict the second driving disk 9 on the base body 22;

[0080] A through hole 28 is provided at the center of the main body portion 25, and the outer protruding portion 4 and the inner protruding portion 6 are both located in the through hole 28; in this embodiment, a first notch groove 29 for the first protruding portion 17 to protrude is provided on the first convex ring portion 26, and a second notch groove 30 for the second protruding portion 18 to protrude is provided on the second convex ring portion 27.

[0081] As Figure 1 、 3 shown in FIG. 4, the stator winding 100 is connected to the stator core 200, and a positioning and mating mechanism for assembling and connecting with the stator core 200 is connected to the base 2. When the positioning and mating mechanism is assembled in place with the stator core 200, the wire head 1 extends into the clamping space 7 between the corresponding outer protrusion 4 and the corresponding inner protrusion 6.

[0082] As Figure 1 、 3 shown in FIG. 4, the positioning and mating mechanism includes a plurality of positioning blocks 31 connected to the base 2 and arranged in sequence along the circumferential direction. The positioning block 31 is provided with a positioning step portion 32 for abutting against the end face of the stator core 200 and a positioning abutting portion 33 for abutting against the outer side wall of the stator core 200; in this embodiment, the positioning block 31 is connected to the second cover plate 24, and there are 4 positioning blocks 31.

[0083] As Figure 5 shown in FIG., the first chuck 3 may include a first slider 34 and a first clamping block 35; wherein, the first slider 34 is slidably connected to the base 2 along the radial direction of the base 2, the first clamping block 35 is connected to one end of the first slider 34 close to the center of the base 2, and the outer protrusion 4 is arranged on the first clamping block 35;

[0084] The second chuck 5 may include a second slider 36 and a second clamping block 37; wherein, the second slider 36 is slidably connected to the base 2 along the radial direction of the base 2, the second clamping block 37 is connected to one end of the second slider 36 close to the center of the base 2, and the inner protrusion 6 is arranged on the second clamping block 37; in this embodiment, the first slider 34 is slidably fitted in the corresponding first chute 20, the second slider 36 is slidably fitted in the corresponding second chute 21, the first driving pin 11 is connected to the first slider 34, and the second driving pin 13 is connected to the second slider 36.

[0085] As Figure 5 shown in FIG., the inner protrusion 6 includes a vertical extension portion 38 connected to the second clamping block 37 and extending downward, and a horizontal extension portion 39 connected to the vertical extension portion 38 and used for abutting against the inner side wall of the corresponding wire head 1; specifically, the clamping space 7 is arranged between the horizontal extension portion 39 and the corresponding outer protrusion 4.

[0086] In summary, the lead 1 on the stator winding 100 adopts an X-Pin structure, and there is no straight line segment extending upward at the end of the lead 1 with the X-Pin structure. Among them, both the outer convex portion 4 and the inner convex portion 6 extend downward. When the base 2 is assembled in place with the stator core 200, the outer convex portion 4 can extend downward to the outside of the lead 1 and the inner convex portion 6 can extend downward to the inside of the lead 1. At this time, the lead 1 is located in the clamping space 7 between the corresponding outer convex portion 4 and the corresponding inner convex portion 6. Then, the clamping drive mechanism is used to drive the first chuck 3 to move inward in the radial direction and drive the second chuck 5 to move outward in the radial direction, so that the outer convex portion 4 on the first chuck 3 abuts against the outer side wall of the corresponding lead 1 and the inner convex portion 6 on the second chuck 5 abuts against the inner side wall of the corresponding lead 1, so that the outer convex portion 4 and the inner convex portion 6 clamp the corresponding lead 1. Therefore, by providing the downward-extending outer convex portion 4 and the downward-extending inner convex portion 6, the lead 1 with the X-Pin structure without a straight line segment can be clamped. Clamping the lead 1 with the X-Pin structure first and then performing welding can make the welding of the lead 1 with the X-Pin structure more convenient.

[0087] In the specific embodiments described above, the technical problems solved, technical solutions, and beneficial effects of the present invention have been further described in detail. It should be understood that the above description is only for the specific embodiments of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wire end clamping device for stator winding welding, wherein the end of the stator winding (100) has a plurality of wire ends (1) to be welded, characterized in that: include: Base (2); a plurality of first clamps (3) arranged in sequence along the circumference of the base (2), the first clamps (3) being slidably connected to the base (2) along the radial direction of the base (2), the first clamps (3) being provided with an outer protrusion (4) extending downward and used to abut against the outer side wall of the corresponding thread head (1); a plurality of second clamps (5) arranged in sequence along the circumference of the base (2); the second clamps (5) are slidably connected to the base (2) along the radial direction of the base (2); the second clamps (5) are provided with an inner protrusion (6) extending downward and used to abut against the inner side wall of the corresponding thread head (1); a clamping space (7) for the corresponding thread head (1) to extend into is provided between the inner protrusion (6) and the corresponding outer protrusion (4); A clamping drive mechanism, the clamping drive mechanism is connected to the first clamp (3) and is used to drive the first clamp (3) to move radially so that the outer protrusion (4) abuts against the corresponding outer side wall of the thread head (1); the clamping drive mechanism is also connected to the second clamp (5) and is used to drive the second clamp (5) to move radially so that the inner protrusion (6) abuts against the corresponding inner side wall of the thread head (1), thereby causing the outer protrusion (4) and the inner protrusion (6) to clamp the corresponding thread head (1).

2. The wire end clamping device for stator winding welding according to claim 1, characterized in that: The clamping drive mechanism comprises a first drive disk (8), a second drive disk (9) and a drive assembly; The first driving disk (8) is rotatably connected to the base (2), and the first driving disk (8) is provided with a plurality of first driving grooves (10) distributed sequentially along the circumferential direction; The first chuck (3) is connected with a first driving pin (11), and the first driving pin (11) is engaged in the corresponding first driving groove (10) so that when the first driving disk (8) rotates, the first driving pin (11) and the first chuck (3) are driven to move radially through the first driving groove (10); The second driving disk (9) is rotatably connected to the base (2), and the second driving disk (9) is provided with a plurality of second driving grooves (12) distributed sequentially along the circumferential direction; The second chuck (5) is connected with a second driving pin (13), and the second driving pin (13) is engaged in the corresponding second driving groove (12) so that when the second driving disk (9) rotates, the second driving pin (13) and the second chuck (5) are driven to move radially through the second driving groove (12); The first driving disk (8) and the second driving disk (9) are used to rotate in the same direction along the circumferential direction, thereby driving the first chuck (3) and the second chuck (5) to move in the same direction along the radial direction of the base (2) so as to adjust the radial positions of the first chuck (3) and the second chuck (5); The driving assembly is connected to the first driving disk (8) and the second driving disk (9) respectively, and is used to drive the first driving disk (8) and the second driving disk (9) to rotate in opposite directions, thereby driving the first clamp (3) and the second clamp (5) to move in opposite directions along the radial direction of the base (2) so as to clamp or loosen the thread end (1).

3. The wire end clamping device for stator winding welding according to claim 2, characterized in that: The driving assembly comprises a first driving block (14), a second driving block (15) and a driving screw (16); The first driving block (14) is rotatably connected to the first driving disk (8), and the second driving block (15) is rotatably connected to the second driving disk (9); One end of the driving screw (16) is provided with a first threaded portion, and the other end of the driving screw (16) is provided with a second threaded portion having a rotation direction opposite to that of the first threaded portion; The first threaded portion is threadedly connected to the first driving block (14), and the second threaded portion is threadedly connected to the second driving block (15).

4. The wire end clamping device for stator winding welding according to claim 3, characterized in that: The first driving disk (8) is provided with a first extending portion (17), the second driving disk (9) is provided with a second extending portion (18), the first driving block (14) is rotatably connected to the first extending portion (17), and the second driving block (15) is rotatably connected to the second extending portion (18).

5. The wire end clamping device for stator winding welding according to claim 2, characterized in that: The base (2) is provided with a first slide groove (20) corresponding to the first clamp (3) one by one, and the first clamp (3) is radially slidably arranged in the corresponding first slide groove (20); The base (2) is also provided with a second slide groove (21) corresponding one-to-one to the second clamp (5), and the second clamp (5) is radially slidably arranged in the corresponding second slide groove (21).

6. The wire end clamping device for stator winding welding according to claim 5, characterized in that: The base (2) comprises a base body (22), a first cover plate (23) and a second cover plate (24); The seat body (22) comprises a main body portion (25), a first convex ring portion (26) connected to the outer periphery of the main body portion (25) and protruding upward, and a second convex ring portion (27) connected to the outer periphery of the main body portion (25) and protruding downward. The first slide grooves (20) are arranged on the upper end surface of the main body (25) and are sequentially distributed along the circumferential direction, and the first chuck (3) is radially slidably arranged in the corresponding first slide grooves (20); The second slide grooves (21) are arranged on the lower end surface of the main body (25) and are sequentially distributed along the circumferential direction, and the second chuck (5) is radially slidably arranged in the corresponding second slide grooves (21); The first driving disk (8) is rotatably arranged on the inner side of the first convex ring portion (26) and is located above the main body portion (25) so that the first driving disk (8) can restrict the first clamp (3) in the corresponding first sliding groove (20), and the outer side wall of the first driving disk (8) is in contact with the inner side wall of the first convex ring portion (26); The second driving disk (9) is rotatably arranged on the inner side of the second convex ring portion (27) and is located below the main body portion (25) so that the second driving disk (9) can restrict the second clamp (5) in the corresponding second sliding groove (21), and the outer side wall of the second driving disk (9) is in contact with the inner side wall of the second convex ring portion (27); The first cover plate (23) is connected to the first convex ring portion (26), and the inner circumference of the first cover plate (23) contacts and cooperates with the upper surface of the first driving disk (8) to restrict the first driving disk (8) on the seat body (22); The second cover plate (24) is connected to the second convex ring portion (27), and the inner circumference of the second cover plate (24) contacts and cooperates with the lower surface of the second drive disk (9) to restrict the second drive disk (9) on the seat body (22); A through hole (28) is provided at the center of the main body (25), and the outer protrusion (4) and the inner protrusion (6) are both located in the through hole (28).

7. The wire end clamping device for stator winding welding according to claim 1, characterized in that: The stator winding (100) is connected to the stator core (200), and the base (2) is connected to a positioning and matching mechanism for assembly and connection with the stator core (200); when the positioning and matching mechanism is assembled with the stator core (200), the wire end (1) extends into the clamping space (7) between the corresponding outer protrusion (4) and the corresponding inner protrusion (6).

8. The wire end clamping device for stator winding welding according to claim 7, characterized in that: The positioning and matching mechanism comprises a plurality of positioning blocks (31) connected to the base (2) and arranged in sequence along the circumferential direction, wherein the positioning blocks (31) are provided with a positioning step portion (32) for abutting against an end face of the stator core (200) and a positioning abutting portion (33) for abutting against an outer side wall of the stator core (200).

9. The wire end clamping device for stator winding welding according to claim 1, characterized in that: The first clamping head (3) comprises a first sliding block (34) and a first clamping block (35); wherein the first sliding block (34) is connected to the base (2) in a radially sliding manner of the base (2); the first clamping block (35) is connected to an end of the first sliding block (34) close to the center of the base (2); and the outer protrusion (4) is provided on the first clamping block (35); The second clamp (5) comprises a second slider (36) and a second clamp block (37); wherein the second slider (36) is connected to the base (2) in a radially sliding manner along the base (2), the second clamp block (37) is connected to an end portion of the second slider (36) close to the center of the base (2), and the inner protrusion (6) is provided on the second clamp block (37).

10. The wire end clamping device for stator winding welding according to claim 9, characterized in that: The inner protrusion (6) comprises a vertical extension portion (38) connected to the second clamping block (37) and extending downward, and a lateral extension portion (39) connected to the vertical extension portion (38) and used to abut against the inner side wall of the corresponding thread head (1).

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