Motor rotor welding fixture

Abstract

The invention relates to the technical field of motor rotor welding, and discloses a motor rotor welding fixture which comprises a base, a support is arranged on the base, a connecting rod is rotatably arranged on the support, two clamping plates are slidably arranged on the connecting rod, a driving mechanism for driving the two clamping plates to slide is arranged on the connecting rod, and a motor rotor is located between the two clamping plates. Compared with the prior art, the motor rotor fixing device has the advantages that the motor rotor fixing device is provided with the adjusting mechanism, when the motor rotor is placed in the inserting hole, the adjusting mechanism can drive the driving column on the frame body to move, and the motor rotor can be fixed on the motor rotor fixing device. And the synchronous assembly, the positioning assembly and the moving assembly are arranged, so that the axis of the end ring coincides with the axis of the motor rotor, the operation process is simple, and the positioning speed is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the motor rotor welding technical field, specifically pointing to a kind of motor rotor welding fixture. BACKGROUND

[0002] Motor rotor is the rotating part in motor, motor rotor is composed of shaft, core, bar and end ring, in the motor rotor processing process, bar needs to be inserted into the slot of core, then end ring is welded with bar.

[0003] Because multiple bars are arranged on motor rotor, so multiple points on end ring need to be welded, before welding, motor rotor needs to be fixed using fixture, by setting rotating mechanism on fixture, after one point is welded, it can be automatically switched to next welding point, in order to improve the accuracy of welding, motor rotor and end ring need to be positioned respectively, because the axis of fixture is fixed, so motor rotor and end ring need to be adjusted to make the axis of motor rotor and end ring coincide with the axis of fixture, it is more cumbersome, when motor rotor of different diameters is processed, the position of fixture needs to be adjusted to position axis, process is troublesome. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the above difficulties, and to provide a motor rotor welding fixture.

[0005] To solve the above technical problems, the technical scheme provided by the present application is as follows: a motor rotor welding fixture, comprising a base, a support is provided on the base, a connecting rod is rotatably provided on the support, two clamping plates are slidably provided on the connecting rod, a driving mechanism is provided on the connecting rod to drive the two clamping plates to slide, a motor rotor is located between the two clamping plates, an end ring is located on the motor rotor, bars are uniformly inserted into the motor rotor, a hole is provided on the clamping plate for the motor rotor to be inserted, a frame is slidably provided on the clamping plate at the hole, a driving column is rotatably provided on the frame, a rotating mechanism is provided on one side of the frame on the clamping plate to drive the driving column to rotate, an adjusting mechanism is provided on the clamping plate to make the driving column coincide with the axis of the motor rotor by driving the frame, a positioning mechanism is provided on one side of the clamping plate to position the end ring.

[0006] As an improvement, a plug-in column is movably inserted into the clamping plate, when the bottom of the plug-in column is tangent to the upper end surface of the hole, the driving column is coaxial with the hole, the plug-in column drives the frame to move up and down through the adjusting mechanism, the moving distance of the plug-in column is twice the moving distance of the frame.

[0007] As improvement, the adjusting mechanism comprises a groove on the clamping plate, a ring is arranged in the groove, a post is slidably arranged in the ring, two rotating rods one are hingedly arranged on the ring, two rotating rods two are hingedly arranged at one end of the post, the other end of the rotating rods one is hingedly connected with the rotating rods two, an extension rod one is arranged on the frame, a slide rod is arranged at the end of the extension rod one, and the hinged positions of the rotating rods one and the rotating rods two are slidably arranged on the slide rod.

[0008] As improvement, the rotating mechanism comprises a U-shaped plate arranged on one side of the clamping plate, a rotating shaft one is rotatably arranged on the U-shaped plate, a rotating shaft two is rotatably arranged on one side of the driving post, a transmission post one is hingedly connected with the rotating shaft one at one end, a transmission post two is movably inserted on the transmission post one, and one end of the transmission post two is hingedly connected with the rotating shaft two through a universal joint.

[0009] As improvement, the positioning mechanism comprises a synchronous assembly, a positioning assembly and a moving assembly, the synchronous assembly is fixedly arranged on the frame, so that the positioning assembly and the moving assembly keep coaxial, the positioning assembly positions the end ring to keep the center of the end ring coaxial with the center of the motor rotor, and the moving assembly drives the positioned end ring to abut against the guide bar, the synchronous assembly comprises an extension rod two arranged on the frame, a slide hole one matched with the extension rod two is arranged on the clamping plate, a limiting ring is arranged on the extension rod two, a rotating ring is rotatably arranged on the limiting ring, two fixed rods are arranged on the rotating ring, and the positioning assembly is assembled on the fixed rods.

[0010] As improvement, the positioning assembly comprises a square sleeve movably inserted on the fixed rods, a driving ring is fixedly arranged on one end of the square sleeve close to the clamping plate, the moving assembly drives the driving ring to move along the axis of the motor rotor, a fixed ring is arranged on the other end of the square sleeve away from the clamping plate, a plurality of sliding blocks are radially slidably arranged on the fixed ring, a positioning plate limiting the end ring is arranged on one end of the sliding blocks, the positioning plate slides to contact the end ring and makes the center of the end ring coaxial with the center of the motor rotor, a plurality of springs are arranged on the rotating ring, a connecting plate is arranged at one end of the springs, a connecting rope is arranged on the sliding blocks, and one end of the connecting rope is fixedly connected with the connecting plate through the driving ring and the rotating ring.

[0011] As improvement, the moving assembly comprises a reset spring arranged between the square sleeve and the fixed rods, a through hole is arranged on the square sleeve, a clamping plate is rotatably arranged in the through hole, a torsion spring is arranged between the clamping plate and the through hole, an arc-shaped clamping block is arranged on one end of the clamping plate, and a clamping groove matched with the arc-shaped clamping block is arranged on the fixed rod.

[0012] As improvement, the clamping plate is provided with a fixing mechanism limiting the frame, the fixing mechanism comprises a slide hole two on the extension rod one, and a butterfly bolt is threadedly connected on the clamping plate and located in the slide hole two.

[0013] As improvement, the end surface of the driving post in contact with the motor rotor is provided with a friction pattern.

[0014] Compared with the prior art, the motor rotor welding fixture has the advantages that: By setting the adjusting mechanism, when the motor rotor is put into the insertion hole, the adjusting mechanism can drive the driving column on the frame to move, so that the axis of the driving column coincides with the axis of the motor rotor, the operation process is simple, and the positioning speed is fast. By setting the rotating mechanism, the sliding of the driving column can be adapted, and the driving column in different positions can be driven to rotate. By setting the synchronous assembly, the positioning assembly and the moving assembly, when the adjusting mechanism makes the axis of the driving column coincide with the axis of the motor rotor, the synchronous assembly drives the end ring to move, so that the axis of the end ring pre-coincides with the axis of the motor rotor, the positioning assembly positions the end ring, so that the axis of the end ring coincides with the axis of the motor rotor, and the moving mechanism moves the positioned end ring to the guide bar, thereby facilitating subsequent welding. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the motor rotor welding fixture.

[0016] Figure 2 is an exploded view of the motor rotor welding fixture.

[0017] Figure 3 is a schematic view of the rotating mechanism of the motor rotor welding fixture.

[0018] Figure 4 is a schematic view of the adjusting mechanism of the motor rotor welding fixture.

[0019] Figure 5 is an exploded view of the positioning mechanism of the motor rotor welding fixture.

[0020] Figure 6 is a sectional view of the positioning mechanism of the motor rotor welding fixture.

[0021] Figure 7 is a perspective view of the motor rotor welding fixture Figure 6 of the present application.

[0022] Figure 8 is a schematic view of the fixing mechanism of the motor rotor welding fixture.

[0023] Figure 9 is a sectional view of the adjusting mechanism of the motor rotor welding fixture.

[0024] Figure 10 is a working principle diagram of the motor rotor welding fixture.

[0025] As shown in the figure: 1, base; 11, support; 12, connecting rod; 121, gear; 122, rack; 123, support plate; 124, electric push rod; 13, clamping plate; 14, drive mechanism; 141, sliding groove; 142, two-way screw; 15, motor rotor; 16, end ring; 17, guide bar; 2, jack; 3, frame; 4, drive column; 5, rotating mechanism; 51, U-shaped plate; 52, rotating shaft one; 53, rotating shaft two; 54, transmission column one; 55, transmission column two; 6, adjusting mechanism; 61, insertion column; 62, circular ring; 63, rotating rod one; 64, rotating rod two; 65, sliding rod; 66, extension rod one; 7, positioning mechanism; 71, synchronization assembly; 711, extension rod two; 712, sliding hole one; 713, limiting ring; 714, rotating ring; 715, fixed rod; 72, positioning assembly; 721, square sleeve; 722, drive ring; 723, fixed ring; 724, sliding block; 725, positioning plate; 726, spring; 727, connecting plate; 728, connecting rope; 73, moving assembly; 731, clamping plate; 732, arc-shaped clamping block; 733, through hole; 8, fixing mechanism; 81, sliding hole two; 82, butterfly bolt; 83, gasket. DETAILED DESCRIPTION

[0026] The application will be further described in detail below with reference to the accompanying drawings.

[0027] The multiple guide bars arranged on the motor rotor can cut the rotating magnetic field, and induce electromotive force and current in the guide bars. The multiple guide bars can increase the number of conductors participating in electromagnetic induction, thereby generating greater induced current. The end ring forms a closed loop, so that the induced current can pass through it.

[0028] In combination with the accompanying drawings, Figure 1 , the accompanying drawings, Figure 2 , the accompanying drawings, Figure 3 As shown in the figure, a motor rotor welding fixture includes a base 1, the base 1 is provided with a support 11, the support 11 is rotatably provided with a connecting rod 12, two clamping plates 13 are slidably arranged on the connecting rod 12, a drive mechanism 14 for driving the two clamping plates 13 to slide is arranged on the connecting rod 12, a motor rotor 15 is located between the two clamping plates 13, an end ring 16 is located on the motor rotor 15, and guide bars 17 are uniformly inserted into the motor rotor 15. The drive mechanism 14 includes a sliding groove 141 on the connecting rod 12, a two-way screw 142 is rotatably arranged in the sliding groove 141, the two clamping plates 13 are respectively slidably arranged at both ends of the sliding groove 141 and are threadedly connected with the two-way screw 142, and one end of the connecting rod 12 is provided with a motor for driving the two-way screw 142 to rotate. The clamping plate 13 is provided with a socket 2 for inserting the motor rotor 15. A frame 3 is slidably provided on the clamping plate 13 at the socket 2. A drive column 4 is rotatably provided on the frame 3. A rotating mechanism 5 for driving the drive column 4 to rotate is provided on one side of the frame 3. An adjustment mechanism 6 is provided on the clamping plate 13 to make the drive column 4 coincide with the axis of the motor rotor 15 by driving the frame 3. A positioning mechanism 7 for positioning the end ring 16 is provided on one side of the clamping plate 13.

[0029] The working principle of this invention is as follows: Two end rings 16 are placed at both ends of the motor rotor 15, and then the two ends of the motor rotor 15 are respectively placed in the two insertion holes 2 of the two clamping plates 13. At this time, the motor rotor 15 rests in the insertion holes 2, and the bottom of the motor rotor 15 is in contact with the inner wall of the insertion hole 2. Then, the adjustment mechanism 6 is turned, and the adjustment mechanism 6 drives the drive column 4 to move and make the axis of the drive column 4 coincide with the axis of the motor rotor 15. Then, the drive mechanism 14 is started, and the drive mechanism 14 drives the two clamping plates 13 to move, so that the drive column 4 is tightly attached to the end of the motor rotor 15. The connecting rod 12 is rotated to make it vertical, which facilitates welding. Then, the positioning mechanism 7 makes the axis of the end ring 16 coincide with the axis of the motor rotor 15, and at the same time, the end ring 16 is pushed to abut against the guide bar 17. Then, welding is performed. Welding can be done by a robotic arm or manually.

[0030] Combined with appendix Figure 2 Appendix Figure 3 As shown, in order to accommodate the frame 3 which can slide up and down while rotating, this application designs a rotating mechanism 5. The rotating mechanism 5 includes a U-shaped plate 51 disposed on one side of the clamping plate 13. A rotating shaft 52 is rotatably disposed on the U-shaped plate 51, and a rotating shaft 53 is rotatably disposed on one side of the drive column 4. One end of the rotating shaft 52 is hinged to a transmission column 54 via a universal joint. A transmission column 55 is movably inserted into the transmission column 54. One end of the transmission column 55 is hinged to the rotating shaft 53 via a universal joint. Through key connection, rotational power transmission can be carried out. The rotating shaft 52 and the rotating shaft 53 are inclined as a whole.

[0031] Working principle of rotating mechanism 5: Since the drive column 4 is movable, in order to drive the drive column 4 at different positions to rotate, a rotating shaft 1 52 is set on the U-shaped plate 51. The rotating shaft 1 52 can be driven by a motor. Then, a transmission column 1 54 is set at one end of the rotating shaft 1 52, and a rotating shaft 2 53 is set on one side of the drive column 4. Since the distance between the drive column 4 and the rotating shaft 1 52 changes after the drive column 4 moves, a transmission column 1 54 and a transmission column 2 55 are set. The adjustable length of the transmission column 1 54 and the transmission column 2 55 can adapt to the drive column 4 at different distances. A universal joint is set at the connection point, so that rotational transmission can be performed.

[0032] Combined with appendix Figure 2 Appendix Figure 3 Appendix Figure 4Appendix Figure 9 Appendix Figure 10 As shown, a plug 61 is movably inserted into the clamping plate 13. When the bottom of the plug 61 is tangent to the upper end face of the insertion hole 2, the driving column 4 is coaxial with the insertion hole 2. The plug 61 drives the frame 3 to move up and down through the adjustment mechanism 6. The moving distance of the plug 61 is twice the moving distance of the frame 3. To achieve a frame 3 moving distance that is half the moving distance of the insertion post 61, the adjustment mechanism 6 includes an insertion post 61 movably inserted into the clamping plate 13. One end of the insertion post 61 extends into the insertion hole 2. The clamping plate 13 is provided with a groove, and a ring 62 is fixedly provided in the groove. The insertion post 61 slides within the ring 62. Two rotating rods 63 are hinged to the ring 62. Two rotating rods 64 are hinged to one end of the insertion post 61. The other end of the rotating rods 63 is hinged to the rotating rods 64. The frame 3 is provided with an extension rod 66. The end of the extension rod 66 is provided with a sliding rod 65. The hinge joint of the rotating rods 63 and 64 is slidably disposed on the sliding rod 65.

[0033] Working principle: In the initial state, the insertion post 61 is positioned at the upper tangent of the insertion hole 2. The axis of the driving post 4 coincides with the axis of the insertion hole 2. The insertion post 61 experiences a certain resistance when moved to prevent it from falling automatically under gravity. The hinge position between the rotating rod 63 and the ring 62 is shown in the attached figure. Figure 9 As shown, the hinge point coincides with the end face of frame 3, ensuring that the axis of motor rotor 15 is precisely aligned with the axis of drive column 4. The hinge position of rotating rod 64 and insert column 61 is shown in the attached figure. Figure 9 As shown, the hinge point coincides with the upper end face of the insertion post 61. The length of the insertion post 61 is long enough to extend to the bottom end of the insertion hole 2. The shaft of the electronic rotor 15 is then placed into the insertion hole 2, as shown in the attached diagram. Figure 10 As shown, the diameter of the socket 2 is D1, the diameter of the motor rotor 15 shaft is D2, and the radii are R1 and R2 respectively. Therefore, the distance the drive column 4 needs to move is R1 - R2, i.e. Figure 10 When L is pressed down, the insertion post 61 moves down and fits against the surface of the motor rotor 15. At this time, the insertion post 61 moves down a distance of D1-D2. Since the driving post 4 moves down a distance of R1-R2, which is half of the distance D1-D2, in order to find that the driving post 4 moves down a distance that is half the distance of the insertion post 61, a rotating rod 63, a rotating rod 64, and a sliding rod 65 are set. The distance that the sliding rod 65 located at the hinge moves down is half the distance of the insertion post 61. Then, an extension rod 66 is set to connect with the sliding rod 65, so that the driving post 4 on the frame 3 moves down a distance of L, so that the axis of the driving post 4 coincides with the axis of the motor rotor 15. No matter what the diameter of the motor rotor 15 is, when the insertion post 61 abuts against the motor rotor 15, the driving shaft 4 and the motor rotor 15 can be made coaxial. Specifically, pressing down on the insertion post 61 causes it to move downwards, with one end of the insertion post 61 contacting the surface of the motor rotor 15. The downward movement of the insertion post 61 causes the rotating rod 64 to move downwards. Since the ring 62 remains stationary, the rotating rod 64 rotates as it moves downwards. The sliding rod 65 located at the ends of the rotating rod 63 and the rotating rod 64 also moves downwards. The sliding rod 65 causes the extension rod 66 to move downwards, which in turn causes the frame 3 to move downwards, thereby causing the drive post 4 to move downwards, so that the axis of the drive post 4 coincides with the axis of the motor rotor 15.

[0034] Combined with appendix Figure 2 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 As shown, the positioning mechanism 7 includes a synchronization component 71, a positioning component 72, and a moving component 73. The synchronization component 71 is fixedly mounted on the frame 3, thereby keeping the positioning component 72 and the moving component 73 coaxial. The positioning component 72 positions the end ring 16 to keep the center of the end ring 16 coaxial with the center of the motor rotor 15. The moving component 73 drives the positioned end ring 16 to abut against the guide bar 17. The synchronization component 71 includes an extension rod 711 mounted on the frame 3. The clamping plate 13 is provided with a sliding hole 712 that cooperates with the extension rod 711. The extension rod 711 is provided with a limiting ring 713. A rotating ring 714 is rotatably mounted on the limiting ring 713. Two fixing rods 715 are provided on the rotating ring 714. The positioning component 72 is assembled on the fixing rods 715.

[0035] Working principle of positioning mechanism 7: As shown above, the center of the frame 3 after it is lowered coincides with the axis of the motor rotor 15. In order to synchronize the positioning mechanism 7, an extension rod 711 is set on the frame 3. The moving distance of the extension rod 711 is also L. Thus, the axis of the limiting ring 713 coincides with the axis of the motor rotor 15, and the axis of the rotating ring 714 also coincides with the axis of the motor rotor 15. Since the motor rotor 15 rotates during welding, the limiting ring 713 and the rotating ring 714 are rotated, so that the rotating ring 714 can rotate with it.

[0036] Combined with appendix Figure 2 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7As shown, the positioning component 72 includes a square sleeve 721 movably inserted into the fixed rod 715. A drive ring 722 is fixedly provided on the square sleeve 721 near the clamping plate 13. The moving component 73 drives the drive ring 722 to move along the axis of the motor rotor 15. A fixed ring 723 is provided on the square sleeve 721 away from the clamping plate 13. A plurality of sliders 724 are radially slidable on the fixed ring 723. A positioning plate 725 is provided at one end of the slider 724 to limit the end ring 16. The positioning plate 725 slides and contacts the end ring 16, making the center of the end ring 16 coaxial with the center of the motor rotor 15. A plurality of springs 726 are provided on the rotating ring 714. A connecting plate 727 is provided at one end of the spring 726. A connecting rope 728 is provided on the slider 724. One end of the connecting rope 728 passes through the drive ring 722 and the rotating ring 714 and is fixedly connected to the connecting plate 727.

[0037] Working principle of positioning component 72: In the initial state, spring 726 is in a relaxed state. After the axis positioning is completed, the connecting rod 12 is made vertical to facilitate welding. Then, the end ring 16 is put on the positioning plate 725 located below. Before the motor rotor 15 is put into the insertion hole 2, the end ring 16 is already put on the motor rotor 15. Then, the moving component 73 drives the fixed ring 723 to move upward. As the distance between the fixed ring 723 and the rotating ring 714 increases, the connecting rope 728 is tightened, the spring 726 is compressed, and the slider 724 drives the positioning plate 725 to move. The positioning plate 725 abuts against the inner wall of the end ring 16. There are three sets of positioning plates 725, and the moving distance of the positioning plates 725 is the same. Thus, the axis of the end ring 16 coincides with the axis of the fixed ring 723, and thus coincides with the axis of the motor rotor 15. When the end ring 16 is in contact with the guide bar 17, the welding operation is performed.

[0038] Combined with appendix Figure 2 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 As shown, the moving component 73 includes a return spring disposed between the square sleeve 721 and the fixed rod 715. The square sleeve 721 is provided with a through hole, and a retaining plate 731 is rotatably disposed in the through hole 733. A torsion spring is provided between the retaining plate 731 and the through hole 733. One end of the retaining plate 731 is provided with an arc-shaped retaining block 732, and the fixed rod 715 is provided with a retaining groove that cooperates with the arc-shaped retaining block 732.

[0039] Working principle: In the initial state, the return spring is in a compressed state and the torsion spring is in a relaxed state. When the end ring 16 is put on the positioning plate 725, the locking plate 731 is moved and the locking plate 731 rotates. The arc-shaped locking block 732 at one end of the locking plate 731 moves away from the locking groove, thereby releasing the fixation between the square sleeve 721 and the fixing rod 715. The return spring pushes the square sleeve 721 to move, thereby driving the end ring 16 on the fixing ring 723 to move the guide rail 17.

[0040] Combined with appendixFigure 1 Appendix Figure 2 Appendix Figure 8 As shown, the clamping plate 13 is provided with a fixing mechanism 8 for limiting the frame 3. The fixing mechanism 8 includes a sliding hole 81 located on the extension rod 66. A wing bolt 82 is threaded onto the clamping plate 13. A washer 83 is sleeved on the wing bolt 82. The wing bolt 82 is located in the sliding hole 81.

[0041] Working principle: In order to ensure that the axis of the drive column 4 always coincides with the axis of the motor rotor 15, the extension rod 66 is fixed by setting the wing bolt 82, the washer 83 and the sliding hole 81, so that the frame 3 will not be displaced.

[0042] Combined with appendix Figure 1 Appendix Figure 2 As shown, one end of the connecting rod 12 is provided with a gear 121, and a rack 122 that meshes with the gear 121 is slidably provided on the bracket 11. A support plate 123 is provided on the bracket 11, and an electric push rod 124 that drives the rack 122 to slide is provided on the support plate 123.

[0043] Working principle: In order to facilitate the rotation of the connecting rod 12, a drive rack 122 and a gear 121 are provided. The rack 122 is driven to move by the electric push rod 124, and the rack 122 drives the gear 121 to rotate, thereby driving the connecting rod 12 to rotate.

[0044] In practical use, when the two ends of the motor rotor 15 are placed into the insertion holes 2, it is necessary to ensure that the ends of the motor rotor 15 pass through the insertion post 61. This is so that the axis of the drive post 4 can be adjusted by the adjustment mechanism 6. The insertion post 61 can abut against the motor rotor 15 when it descends. After the adjustment mechanism 6 adjusts the axis of the drive post 4 to be consistent with the axis of the motor rotor 15, the wing bolt 82 needs to be tightened to fix the frame 3 to prevent the frame 3 from shifting during the welding process. After the welding of the end ring 16 and the guide bar 17 is completed, the drive ring 722 is pressed to make it fit with the rotating ring 714. At this time, the arc-shaped locking block 732 re-enters the slot to fix the square sleeve 721 and the fixing rod 715.

[0045] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A motor rotor welding fixture, comprising a base (1), a bracket (11) provided on the base (1), a connecting rod (12) rotatably provided on the bracket (11), two clamping plates (13) slidably provided on the connecting rod (12), a driving mechanism (14) for driving the two clamping plates (13) to slide on the connecting rod (12), a motor rotor (15) located between the two clamping plates (13), an end ring (16) located on the motor rotor (15), and guide bars (17) evenly inserted on the motor rotor (15), characterized in that: The clamping plate (13) is provided with a socket (2) for inserting the motor rotor (15). A frame (3) is slidably provided on the clamping plate (13) at the socket (2). A drive column (4) is rotatably provided on the frame (3). A rotating mechanism (5) for driving the drive column (4) to rotate is provided on one side of the frame (3). An adjustment mechanism (6) is provided on the clamping plate (13) to make the drive column (4) coincide with the axis of the motor rotor (15) by driving the frame (3). A positioning mechanism (7) for positioning the end ring (16) is provided on one side of the clamping plate (13).

2. The motor rotor welding fixture according to claim 1, characterized in that: A plug (61) is movably inserted into the clamp (13). When the bottom of the plug (61) is tangent to the upper end face of the insertion hole (2), the driving column (4) is coaxial with the insertion hole (2). The plug (61) drives the frame (3) to move up and down through the adjustment mechanism (6). The moving distance of the plug (61) is twice the moving distance of the frame (3).

3. The motor rotor welding fixture according to claim 2, characterized in that: The adjustment mechanism (6) includes a groove on the clamp plate (13), a ring (62) is provided in the groove, the insert (61) slides in the ring (62), two rotating rods (63) are hinged on the ring (62), one end of the insert (61) is hinged to two rotating rods (64), the other end of the rotating rods (63) is hinged to the rotating rods (64), the frame (3) is provided with an extension rod (66), the end of the extension rod (66) is provided with a slide rod (65), and the hinge of the rotating rods (63) and the rotating rods (64) is slidably arranged on the slide rod (65).

4. The motor rotor welding fixture according to claim 1, characterized in that: The rotating mechanism (5) includes a U-shaped plate (51) disposed on one side of the clamping plate (13). A rotating shaft (52) is rotatably disposed on the U-shaped plate (51), and a rotating shaft (53) is rotatably disposed on one side of the drive column (4). A transmission column (54) is hinged to one end of the rotating shaft (52) via a universal joint. A transmission column (55) is movably inserted into the transmission column (54). One end of the transmission column (55) is hinged to the rotating shaft (53) via a universal joint.

5. The motor rotor welding fixture according to claim 1, characterized in that: The positioning mechanism (7) includes a synchronization component (71), a positioning component (72), and a moving component (73). The synchronization component (71) is fixedly mounted on the frame (3), so that the positioning component (72) and the moving component (73) remain coaxial. The positioning component (72) positions the end ring (16) to keep the center of the end ring (16) coaxial with the center of the motor rotor (15). The moving component (73) drives the positioned end ring (16) to abut against the guide bar (17). The synchronization component (71) includes an extension rod two (711) mounted on the frame (3). The clamping plate (13) is provided with a sliding hole one (712) that cooperates with the extension rod two (711). The extension rod two (711) is provided with a limiting ring (713). The limiting ring (713) is rotatably provided with a rotating ring (714). The rotating ring (714) is provided with two fixed rods (715). The positioning component (72) is mounted on the fixed rods (715).

6. A motor rotor welding fixture according to claim 5, characterized in that: The positioning component (72) includes a square sleeve (721) movably inserted into a fixed rod (715). A drive ring (722) is fixedly provided on the square sleeve (721) near the clamping plate (13). The moving component (73) drives the drive ring (722) to move along the axis of the motor rotor (15). A fixed ring (723) is provided on the square sleeve (721) away from the clamping plate (13). A plurality of sliders (724) are radially slidable on the fixed ring (723). One end of the slider (724) A positioning plate (725) is provided to limit the end ring (16). The positioning plate (725) slides to contact the end ring (16) and makes the center of the end ring (16) coaxial with the center of the motor rotor (15). Multiple springs (726) are provided on the rotating ring (714). A connecting plate (727) is provided at one end of the spring (726). A connecting rope (728) is provided on the slider (724). One end of the connecting rope (728) passes through the drive ring (722) and the rotating ring (714) and is fixedly connected to the connecting plate (727).

7. A motor rotor welding fixture according to claim 6, characterized in that: The moving component (73) includes a return spring disposed between a square sleeve (721) and a fixed rod (715). The square sleeve (721) is provided with a through hole (733), and a retaining plate (731) is rotatably disposed inside the through hole (733). A torsion spring is disposed between the retaining plate (731) and the through hole. An arc-shaped retaining block (732) is provided at one end of the retaining plate (731), and a retaining groove is provided on the fixed rod (715) to cooperate with the arc-shaped retaining block (732).

8. A motor rotor welding fixture according to claim 3, characterized in that: The clamping plate (13) is provided with a fixing mechanism (8) for limiting the frame (3). The fixing mechanism (8) includes a sliding hole (81) located on the extension rod (66). A wing bolt (82) is threaded on the clamping plate (13) and the wing bolt (82) is located in the sliding hole (81).

9. A motor rotor welding fixture according to claim 1, characterized in that: The end face of the drive column (4) that contacts the motor rotor (15) is provided with friction texture.

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