An automatic welding device for stator cores of brushed motors

Abstract

This invention relates to the field of welding equipment technology, and more particularly to an automatic welding device for brushed motor stator cores, comprising: a frame, a feeding rack, a clamping seat, and a laser emitter; a support platform is mounted on the frame, the clamping seat is slidably connected to the support platform, and a surrounding clamping mechanism is provided on the support platform. The surrounding clamping mechanism is sleeved on the outside of a stack of stator cores and contacts the stator cores, generating a radial thrust on the welding part of the stator cores to suppress thermal deformation of the welding part of the stator cores during laser welding; this invention places the brushed motor stator cores into a fixed frame, and a sliding block on the fixed frame pushes a contact block, causing the contact block to compress the two sides of the welding part of the brushed motor stator cores. This compression suppresses outward deformation of the area around the welding part of the brushed motor stator cores, while the contact block increases heat dissipation of the brushed motor stator cores, reducing thermal deformation of the brushed motor stator cores.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to an automatic welding device for the stator core of a brushed motor. Background Technology

[0002] The control motor used in the car steering wheel is the core power and control unit of the vehicle steering system. It is widely used in electric power steering (EPS) and steer-by-wire systems. Its performance directly determines the steering accuracy, driving stability and driving safety. The control motor used in the car steering wheel mainly undertakes the core function of converting the driver's steering intention into precise mechanical movements.

[0003] As a key carrier of the magnetic circuit, the welding quality of the stator core of a brushed motor directly determines the stability of the motor's magnetic field, its operating accuracy, and its service life. The stator core is usually made of multiple silicon steel sheets stacked together, and welding is required to fix the core to the mounting structure, ensuring assembly strength and magnetic circuit integrity.

[0004] In the existing technology, when welding stator cores, the stator cores are stacked together, and then pressure is applied to the top and bottom ends of the stack of stator cores to ensure that the stator cores are tightly attached. Then, the laser beam moves up and down to weld the stator cores.

[0005] During the laser welding of stator cores, the high temperature generated during welding is transferred to the area around the stator core, causing deformation of the stator core around the welding area. This affects the welding effect of the stator core and thus creates limitations.

[0006] Therefore, we propose an automatic welding device for the stator core of a brushed motor. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the present invention provides an automatic welding device for the stator core of a brushed motor, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automatic welding device for the stator core of a brushed motor, comprising:

[0009] Frame, support platform, unloading rack, clamping base, and laser emitter;

[0010] The support platform is mounted on the frame, the clamping seat is slidably connected to the support platform, a clamping electric push rod is connected between the clamping seat and the support platform, a welding block is mounted on the frame, a welding seat is slidably connected to the welding block, a welding motor is fixedly connected to the welding block, a lead screw that is threadedly engaged with the welding seat is fixedly connected to the output end of the welding motor, and the laser emitter is mounted on the welding seat.

[0011] The support platform is provided with a surrounding clamping mechanism, which is sleeved on the outside of a stack of stator cores and in contact with the stator cores. The surrounding clamping mechanism generates radial thrust on the welding part of the stator cores, suppressing thermal deformation of the welding part of the stator cores during laser welding.

[0012] Preferably, the surrounding clamping mechanism includes a fixed frame, a contact block, and a sliding block. The fixed frame is mounted on the support platform. The fixed frame has a sliding groove and a through groove. A pair of sliding grooves are located on both sides of the through groove and are arranged in a figure-eight shape. The sliding block is slidably connected in the sliding groove. The contact block is mounted on the sliding block. A pressing screw is threaded onto the fixed frame and is rotatably connected to the sliding block.

[0013] By placing the brushed motor stator core into a fixed frame, the sliding block on the fixed frame pushes the contact block, causing the contact block to press against the two sides of the welded area of ​​the brushed motor stator core. This pressing suppresses the outward deformation of the area around the welded area of ​​the brushed motor stator core. At the same time, the contact block increases heat dissipation of the brushed motor stator core, reducing thermal deformation of the brushed motor stator core.

[0014] Preferably, the surrounding clamping mechanism further includes an mounting cylinder and a rotating sleeve. The mounting cylinder is slidably connected to the support platform. A lifting electric push rod is connected between the mounting cylinder and the support platform. A telescopic block is slidably connected to the mounting cylinder. A telescopic electric push rod is connected between the telescopic block and the mounting cylinder. The rotating sleeve is mounted on the telescopic block. A rotating motor is fixedly connected to the telescopic block.

[0015] Preferably, a connecting block is rotatably connected to the telescopic block, the connecting block is rotatably connected to the rotating sleeve, and a pressure sensor is connected between the connecting block and the rotating sleeve.

[0016] By setting an upper and lower sliding connection on the support block, the telescopic block on the mounting cylinder pushes the rotating sleeve to fit on the extrusion screw. The rotating motor drives the rotating sleeve to rotate, twisting the extrusion screw. A pressure sensor is set between the connecting block and the rotating sleeve to detect the magnitude of the force of twisting the extrusion screw, thereby preventing the contact block from excessively extruding the stator core of the brushed motor.

[0017] Preferably, the contact block is slidably connected to the sliding block, and the contact block and the sliding block are connected by bolts.

[0018] Preferably, conveyor belts are provided on both sides of the frame.

[0019] Preferably, a push block is slidably connected to the support platform, a lowering block is slidably connected to the push block, a push motor is fixedly connected to the support platform, a lead screw that is threadedly engaged with the push block is fixedly connected to the output end of the push motor, and a lowering electric push rod is connected between the lowering block and the push block.

[0020] The beneficial effects of this invention are:

[0021] 1. The present invention places the stator core of a brushed motor into a fixed frame, and the sliding block on the fixed frame pushes the contact block, so that the contact block squeezes the two sides of the welding part of the stator core of the brushed motor. The squeezing suppresses the outward deformation of the area around the welding part of the stator core of the brushed motor. At the same time, the contact block increases the heat dissipation of the stator core of the brushed motor and reduces the thermal deformation of the stator core of the brushed motor.

[0022] 2. The present invention provides an installation cylinder that slides vertically on a support block. A telescopic block on the installation cylinder pushes a rotating sleeve onto the extrusion screw. A rotating motor drives the rotating sleeve to rotate, twisting the extrusion screw. A pressure sensor is installed between the connecting block and the rotating sleeve to detect the magnitude of the force of twisting the extrusion screw, thereby preventing the contact block from excessively compressing the stator core of the brushed motor. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of the mounting cylinder and the fixing frame in this invention;

[0026] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0027] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0028] Figure 6 This is a partial sectional view of the mounting cylinder and support platform in this invention;

[0029] Figure 7 for Figure 6 Enlarged view of point D in the middle.

[0030] In the diagram: 1. Frame; 11. Support platform; 12. Unloading rack; 13. Clamping seat; 14. Laser emitter; 15. Clamping electric push rod; 16. Welding block; 17. Welding seat; 18. Welding motor; 21. Fixing frame; 22. Contact block; 23. Sliding block; 24. Sliding groove; 25. Through groove; 26. Extrusion screw; 27. Mounting cylinder; 28. Rotating sleeve; 3. Lifting electric push rod; 31. Telescopic block; 32. Telescopic electric push rod; 33. Rotating motor; 34. Connecting block; 35. Pressure sensor; 36. Conveyor belt; 37. Pushing block; 38. Lowering block; 39. Pushing motor; 4. Lowering electric push rod. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1: Refer to the appendix of the instruction manual. Figures 1 to 7 An automatic welding device for the stator core of a brushed motor, comprising:

[0033] The machine frame 1, support platform 11, unloading rack 12, clamping seat 13, and laser emitter 14;

[0034] The support platform 11 is mounted on the frame 1. The clamping seat 13 is slidably connected to the support platform 11. A clamping electric push rod 15 is connected between the clamping seat 13 and the support platform 11. A welding block 16 is mounted on the frame 1. A welding seat 17 is slidably connected to the welding block 16. A welding motor 18 is fixedly connected to the welding block 16. A lead screw that is threadedly engaged with the welding seat 17 is fixedly connected to the output end of the welding motor 18. The laser emitter 14 is mounted on the welding seat 17.

[0035] The support platform 11 is provided with a surrounding clamping mechanism, which is sleeved on the outside of a stack of stator cores and in contact with the stator cores. It generates radial thrust on the welding part of the stator cores to suppress thermal deformation of the welding part of the stator cores during laser welding.

[0036] In this invention, the surrounding clamping mechanism includes a fixed frame 21, a contact block 22, and a sliding block 23. The fixed frame 21 is mounted on the support platform 11. The fixed frame 21 has a sliding groove 24 and a through groove 25. A pair of sliding grooves 24 are located on both sides of the through groove 25 and are arranged in a V-shape. The sliding block 23 is slidably connected in the sliding groove 24. The contact block 22 is mounted on the sliding block 23. A pressing screw 26 is threadedly connected to the fixed frame 21, and the pressing screw 26 is rotatably connected to the sliding block 23.

[0037] In this invention, after the brushed motor stator cores are stacked together and placed in the fixed frame 21, the brushed motor stator cores and the fixed frame 21 are placed together on the support platform 11. Then, the pressing screw 26 is rotated, which pushes the sliding block 23 and the contact block 22 to move towards the brushed motor stator core, and the contact block 22 presses the brushed motor stator core. The contact blocks 22 located on both sides of the through slot 25 press the two sides of the part to be welded on the brushed motor stator core. Then, the clamping electric push rod 15 pushes the clamping seat 13 downward, so that the clamping block on the clamping seat 13 extends into the fixed frame 21, pressing the brushed motor stator core. Then, the welding motor 18 drives the motor to start welding. The corresponding lead screw rotates, causing the welding seat 17 to lift the laser emitter 14 slightly upward. The laser emitter 14 emits a high-energy laser beam that irradiates the stator core of the brushed motor. The high-energy laser beam is located between the two contact blocks 22. The high-energy laser beam melts the stator core of the brushed motor and causes the adjacent brushed motor stator cores to fuse together. The contact blocks 22 press against the two sides of the laser welding part on the stator core of the brushed motor, suppressing the deformation of the two sides of the welding part on the stator core of the brushed motor. At the same time, the contact blocks 22 are in contact with the two sides of the welding part of the stator core of the brushed motor, which can increase the heat dissipation of the stator core of the brushed motor and reduce the thermal deformation of the stator core of the brushed motor.

[0038] The present invention places the stator core of a brushed motor into a fixed frame 21. The sliding block 23 on the fixed frame 21 pushes the contact block 22, so that the contact block 22 squeezes the two sides of the welding part of the brushed motor stator core. The squeezing suppresses the outward deformation of the area around the welding part of the brushed motor stator core. At the same time, the contact block 22 increases the heat dissipation of the brushed motor stator core and reduces the thermal deformation of the brushed motor stator core.

[0039] Example 2: Based on Example 1, refer to the appendix of the instruction manual. Figures 1 to 7In this invention, the surrounding clamping mechanism further includes an mounting cylinder 27 and a rotating sleeve 28. The mounting cylinder 27 is slidably connected to the support platform 11. A lifting electric push rod 3 is connected between the mounting cylinder 27 and the support platform 11. A telescopic block 31 is slidably connected to the mounting cylinder 27. A telescopic electric push rod 32 is connected between the telescopic block 31 and the mounting cylinder 27. The rotating sleeve 28 is mounted on the telescopic block 31. A rotating motor 33 is fixedly connected to the telescopic block 31.

[0040] In this invention, a connecting block 34 is rotatably connected to the telescopic block 31, the connecting block 34 is rotatably connected to the rotating sleeve 28, and a pressure sensor 35 is connected between the connecting block 34 and the rotating sleeve 28.

[0041] In this invention, the mounting cylinder 27 is slidably connected to the support platform 11. The lifting electric push rod 3 pushes the mounting cylinder 27 upward, so that the rotating sleeve 28 on the mounting cylinder 27 is at the same height as the extrusion screw 26. Then, the telescopic electric push rod 32 pushes the telescopic block 31 and the rotating sleeve 28 outward, so that the rotating sleeve 28 is sleeved on the outside of the extrusion screw 26. Then, the rotating motor 33 drives the rotating sleeve 28 and the extrusion screw 26 to rotate, thereby driving the sliding block 23 and the contact block 22 to move. Then, the telescopic block 31 retracts into the mounting cylinder 27, and the mounting cylinder 27 returns to its original position downward.

[0042] In this invention, the rotating motor 33 drives the rotating sleeve 28 to rotate through the connecting block 34. During the rotation of the extrusion screw 26, the pressure sensor 35 can detect the magnitude of the force when the extrusion screw 26 rotates. When the magnitude of the force exceeds the preset value, the rotating motor 33 stops rotating, thereby preventing the contact block 22 from excessively extruding the stator core of the brushed motor.

[0043] This invention provides a mounting cylinder 27 that slides vertically on a support block. A telescopic block 31 on the mounting cylinder 27 pushes a rotating sleeve 28 onto a pressing screw 26. A rotating motor 33 drives the rotating sleeve 28 to rotate, twisting the pressing screw 26. A pressure sensor 35 is placed between the connecting block 34 and the rotating sleeve 28 to detect the magnitude of the force that twists the pressing screw 26, thereby preventing the contact block 22 from excessively compressing the brushed motor stator core.

[0044] In this invention, the contact block 22 is slidably connected to the sliding block 23, and the contact block 22 and the sliding block 23 are connected by bolts.

[0045] In this invention, conveyor belts 36 are provided on both sides of the frame 1.

[0046] In this invention, a push block 37 is slidably connected to the support platform 11, a descending block 38 is slidably connected to the push block 37, a push motor 39 is fixedly connected to the support platform 11, a lead screw that is threadedly engaged with the push block 37 is fixedly connected to the output end of the push motor 39, and a descending electric push rod 4 is connected between the descending block 38 and the push block 37.

[0047] In this invention, the sliding block 23 and the contact block 22 are slidably connected. The length of the contact block 22 extending out of the sliding block 23 can be adjusted by loosening the bolts on the sliding block 23. Thus, when the two sides of the welding part of the brush motor stator core are stepped, the two contact blocks 22 with different lengths can contact it. This makes the invention applicable to brush motor stator cores with stepped edge shapes, thus expanding the scope of application of the invention.

[0048] In this invention, conveyor belts 36 are set on both sides of the frame 1, and the fixed frame 21 is placed on the conveyor belts 36. After the fixed frame 21 is conveyed to the bottom of the unloading rack 12, the brushed motor stator core falls into the fixed frame 21 through the conveyor rack. Then the conveyor belt 36 conveys the fixed frame 21 to the side of the support platform 11. The descending block 38 moves downward under the push of the descending electric push rod 4, and the push motor 39 drives the corresponding lead screw to rotate, so that the push block 37 moves with the descending block 38. Thus, the descending block 38 pushes the fixed frame 21 and the brushed motor stator core onto the support platform 11 for welding. After welding, the fixed frame 21 and the brushed motor stator core move to the right conveyor belt 36 under the push of the left fixed frame 21 and the brushed motor stator core, thus realizing continuous welding.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for the stator core of a brushed motor, characterized in that: include: The frame (1), support platform (11), unloading rack (12), clamping seat (13) and laser emitter (14). The support platform (11) is mounted on the frame (1), the clamping seat (13) is slidably connected to the support platform (11), a clamping electric push rod (15) is connected between the clamping seat (13) and the support platform (11), a welding block (16) is mounted on the frame (1), a welding seat (17) is slidably connected to the welding block (16), a welding motor (18) is fixedly connected to the welding block (16), a lead screw that is threadedly engaged with the welding seat (17) is fixedly connected to the output end of the welding motor (18), and a laser emitter (14) is mounted on the welding seat (17). The support platform (11) is provided with a surrounding clamping mechanism. The surrounding clamping mechanism is sleeved on the outside of a stack of stator cores and contacts the stator cores. It generates radial thrust on the welding part of the stator cores to suppress thermal deformation of the welding part of the stator cores during laser welding. The surrounding clamping mechanism includes a fixed frame (21), a contact block (22), and a sliding block (23). The fixed frame (21) is mounted on the support platform (11). The fixed frame (21) has a sliding groove (24) and a through groove (25). A pair of sliding grooves (24) are located on both sides of the through groove (25). The pair of sliding grooves (24) are arranged in a figure-eight shape. The sliding block (23) is slidably connected in the sliding groove (24). The contact block (22) is mounted on the sliding block (23). A pressing screw (26) is threadedly connected to the fixed frame (21). The pressing screw (26) is rotatably connected to the sliding block (23). The surrounding clamping mechanism also includes an mounting cylinder (27) and a rotating sleeve (28). The mounting cylinder (27) is slidably connected to the support platform (11). A lifting electric push rod (3) is connected between the mounting cylinder (27) and the support platform (11). A telescopic block (31) is slidably connected to the mounting cylinder (27). A telescopic electric push rod (32) is connected between the telescopic block (31) and the mounting cylinder (27). The rotating sleeve (28) is mounted on the telescopic block (31). A rotating motor (33) is fixedly connected to the telescopic block (31). A connecting block (34) is rotatably connected to the telescopic block (31), and the connecting block (34) is rotatably connected to the rotating sleeve (28). A pressure sensor (35) is connected between the connecting block (34) and the rotating sleeve (28).

2. The automatic welding device for the stator core of a brushed motor according to claim 1, characterized in that: The contact block (22) is slidably connected to the sliding block (23), and the contact block (22) and the sliding block (23) are connected by bolts.

3. An automatic welding device for the stator core of a brushed motor according to claim 2, characterized in that: Conveyor belts (36) are provided on both sides of the frame (1).

4. An automatic welding device for the stator core of a brushed motor according to claim 3, characterized in that: A push block (37) is slidably connected to the support platform (11), a descending block (38) is slidably connected to the push block (37), a push motor (39) is fixedly connected to the support platform (11), a lead screw that is threadedly connected to the push block (37) is fixedly connected to the output end of the push motor (39), and a descending electric push rod (4) is connected between the descending block (38) and the push block (37).

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