Automatic insulation paper inserting machine for motor stator

Abstract

The present invention belongs to the technical field of motor stator and insulating paper assembly and processing, and proposes an automatic insulating paper insertion machine for a motor stator, comprising a machine body; a paper feeding device, the paper feeding device being used to feed insulating paper; a folding device, the folding device being used to fold the insulating paper so as to subsequently shape the insulating paper; a forming die mechanism, the forming die mechanism being used to finally shape the insulating paper processed by the folding device; a stator mechanism, the stator mechanism being used to load and position the stator; and a paper pushing mechanism, the paper pushing mechanism being used to push the insulating paper shaped by the forming die mechanism into a slot of the stator. The paper feeding device, the folding device, the forming die mechanism, the stator mechanism, and the paper pushing mechanism are all arranged on the machine body to meet the requirements of automatically folding and shaping the insulating paper and inserting it into the slot of the stator, thereby improving the production efficiency of the stator and insulating paper assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of motor stator and insulation paper assembly and processing, and particularly relates to an automatic insulation paper inserting machine for a motor stator. Background Art

[0002] The stator is a crucial component of a motor. Its core function is to generate a rotating magnetic field through electromagnetic induction, thereby driving the rotor. The stator typically consists of an iron core and windings, which are insulated by insulating materials (such as insulating paper) to prevent short circuits and electrical failures.

[0003] Traditionally, the insertion of insulation paper into stator windings relies primarily on manual labor, which is not only inefficient but also prone to quality instability due to human error. Workers need to manually cut the insulation paper according to the stator size and design requirements and insert it into the stator slots. This operation method has the following problems:

[0004] Low efficiency of manual operation: Manual operation is slow and cannot meet the needs of large-scale production.

[0005] Poor consistency of insulation paper produced by manual operation: Different workers' operating habits and technical levels may lead to inconsistencies in the insertion position and depth of insulation paper, affecting product quality.

[0006] High labor cost: Manual operation requires a lot of labor, which increases production costs.

[0007] Safety hazards: The cutting and inserting process of insulating paper may generate dust or sharp edges, posing a threat to workers' health.

[0008] With the rapid development of industrial automation, automatic insulation paper inserting machines have emerged and become important equipment in the motor manufacturing field. Summary of the Invention

[0009] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an automatic insulation paper inserting machine for a motor stator.

[0010] In order to achieve the above object, the technical solution provided by the present invention is:

[0011] An automatic insulating paper inserting machine for a motor stator, comprising:

[0012] body;

[0013] A paper feeding device, the paper feeding device is used to feed insulating paper;

[0014] A folding device, which is used to fold the insulation paper so that the insulation paper can be subsequently shaped;

[0015] A forming die mechanism, the forming die mechanism being used to perform final shaping on the insulating paper processed by the folding device;

[0016] A stator mechanism, which is used to load and position the stator;

[0017] A paper pushing mechanism, which is used to push the insulating paper shaped by the forming die mechanism into the slots of the stator;

[0018] The paper feeding device, the folding device, the forming die mechanism, the stator mechanism and the paper pushing mechanism are all arranged on the machine body.

[0019] In a further embodiment of the present invention, the molding die mechanism includes:

[0020] An intermediate forming die, the intermediate forming die being used to receive the insulating paper conveyed to the intermediate forming die, and the intermediate forming die being fixedly arranged on the forming die mechanism of the machine body;

[0021] A side forming die, the side forming die being located on the side of the middle forming die and being used to press against the side of the middle forming die to shape the side of the insulating paper;

[0022] A lower forming die, located below the middle forming die, is used to press against the lower portion of the middle forming die to shape the lower portion of the insulating paper;

[0023] An upper forming die, located above the middle forming die, is used to press against the upper portion of the middle forming die to shape the upper portion of the insulating paper;

[0024] In a further embodiment of the present invention, the side forming mold, the lower forming mold and the upper forming mold are respectively connected to a forming drive device, so that the side forming mold can move back and forth in the horizontal direction to press toward the middle forming mold or away from the middle forming mold, and the lower forming mold and the upper forming mold can move back and forth up and down to press toward the middle forming mold or away from the middle forming mold.

[0025] In a further embodiment of the present invention, the upper forming die is provided with an upper groove opposite to the intermediate forming die, and the inner top surface of the upper groove and the upper portion of the intermediate forming die opposite to the upper groove are respectively provided with arc-shaped surface portions that cooperate with each other;

[0026] In a further embodiment of the present invention, the side portion of the intermediate forming mold and the side portion of the side forming mold corresponding to the side portion of the intermediate forming mold are respectively provided with first inclined surfaces that cooperate with each other, and the horizontal distance of the inclined surfaces from the vertical bisector of the intermediate forming mold gradually decreases from top to bottom;

[0027] In a further embodiment of the present invention, a shaping groove is provided at the bottom of the intermediate forming mold, and a boss is provided at the top of the lower forming mold corresponding to the shaping groove. When the lower forming mold moves upward, the boss extends into the shaping groove. The two sides of the lower opening of the shaping groove of the intermediate forming mold and the outer periphery of the lower part of the boss on the lower forming mold are respectively provided with second inclined surfaces that match each other. The horizontal distance of the second inclined surface from the vertical bisector of the intermediate forming mold gradually increases from top to bottom.

[0028] In a further embodiment of the present invention, the paper pushing mechanism includes a guide seat, a movable seat, a paper pushing rod and a paper pushing driving device;

[0029] The guide seat is arranged on the machine body, the movable seat is movably arranged on the guide seat, the paper pushing rod is fixedly arranged on the movable seat, the output shaft of the paper pushing driving device is transmission-connected with the movable seat, and when the paper pushing driving device drives the movable seat and the paper pushing rod to move toward the forming die mechanism, the movable seat drives the paper pushing rod to slide on the guide seat, and the paper pushing rod pushes the insulating paper on the middle forming die into the slot of the stator;

[0030] In a further embodiment of the present invention, the forming mold mechanism is provided with a first air-avoiding groove for the paper push rod to pass through, and the middle forming mold, the upper forming mold and the side forming mold are respectively provided with a first air-avoiding groove.

[0031] In a further embodiment of the present invention, the stator mechanism includes an indexing die plate and a die plate driving device for driving the indexing die plate to rotate;

[0032] In a further embodiment of the present invention, the indexing die is provided with a positioning platform for mounting the stator and a plurality of paper insertion guide modules located on the periphery of the positioning platform and evenly spaced along the circumferential direction. The stator is mounted on the positioning platform, and the plurality of paper insertion guide modules correspond one-to-one to the slots on the stator, and the paper insertion guide modules extend into the corresponding stator slots.

[0033] In a further embodiment of the present invention, the stator mechanism includes a guide wheel assembly for positioning the indexing die plate;

[0034] In a further embodiment of the present invention, the guide wheel assembly includes three guide wheels rotatably mounted on the machine body, the guide wheels being arranged circumferentially and spaced apart on the periphery of the indexing die plate to support and define the vertical and lateral positions of the indexing die plate, the guide wheels having an annular groove formed on their sides, and the edge of the indexing die plate being disposed within the annular groove;

[0035] In a further embodiment of the present invention, the guide wheel assembly further comprises an adjustment frame for rapid assembly and disassembly of the indexing die plate, at least one of the guide wheels is provided with an adjustment frame, and the guide wheel is rotatably mounted on the adjustment frame, the adjustment frame being movably mounted on the machine body so that when the adjustment frame is moved, the guide wheel can be moved away from or closer to the indexing die plate, and a locking assembly for locking and releasing the adjustment frame is provided on the machine body so that the adjustment frame is locked to the machine body, and the locking assembly releases the force of locking the adjustment frame to enable the adjustment frame to move on the machine body;

[0036] In a further embodiment of the present invention, a driven gear is provided on the indexing die plate, and the die plate driving device includes a die plate driving motor and a gear set connected to an output end of the die plate driving motor, and the gear set is drivingly connected to the driven gear on the indexing die plate;

[0037] In a further embodiment of the present invention, the die plate driving motor drives the indexing die plate and the stator on the indexing die plate to rotate. Every time the stator rotates to a corresponding position angle, the paper pushing mechanism inserts the shaped insulating paper into the corresponding slot of the stator.

[0038] In a further embodiment of the present invention, the stator mechanism further comprises a movable positioning assembly for positioning the stator;

[0039] In a further embodiment of the present invention, the movable positioning assembly includes a swing arm cylinder, a transmission swing arm, and a positioning swing arm provided on the machine body, the swing arm cylinder is provided with a swing arm cylinder telescopic rod, a first end of the transmission swing arm is hinged to an end of the swing arm cylinder telescopic rod away from the swing arm cylinder, and the first end of the positioning swing arm is connected to the second end of the transmission swing arm;

[0040] In a further embodiment of the present invention, the first end of the positioning swing arm and the second end of the transmission swing arm are locked and connected via a shaft and operate synchronously. The shaft is rotatably mounted on the machine body. The positioning swing arm is provided with a gland for pressing tightly against the end of the stator and a positioning cylinder for driving the gland to move. The shaft is located outside the guide wheel. A first distance between the axis of the shaft and the center of the gland is L1, and a second distance between the axis of the shaft and the center of the positioning platform is L2, where L1=L2.

[0041] In a further embodiment of the present invention, a buffer cylinder is provided on the machine body below the corresponding transmission swing arm, and the buffer cylinder is provided with a buffer cylinder telescopic rod acting on the side of the transmission swing arm;

[0042] In a further solution of the present invention, the stator is installed on the positioning table of the dividing mold, the swing arm cylinder drives the transmission swing arm to drive the positioning swing arm to swing close to the dividing mold, the positioning swing arm swings to the corresponding position angle, and the positioning cylinder drives the pressure cover to be positioned on the outside of the stator so that the stator is positioned on the positioning table for installing the dividing mold; after the stator completes the insertion of the insulating paper, the positioning cylinder drives the pressure cover to reset, and the swing arm cylinder drives the transmission swing arm to drive the positioning swing arm to swing away from the dividing mold and reset, so as to remove the stator from the positioning table of the dividing mold.

[0043] In a further embodiment of the present invention, the paper feeding device includes a paper feeding driving wheel, a paper feeding driven wheel located above the paper feeding driving wheel, and a paper feeding driving device for driving the paper feeding driving wheel to operate. The paper feeding driving wheel and the paper feeding driven wheel are provided with gear parts that cooperate with each other. The gear part of the paper feeding driving wheel is transmission-connected to the output end of the paper feeding driving device, and a channel for conveying insulating paper is formed between the paper feeding driving wheel and the paper feeding driven wheel.

[0044] In a further embodiment of the present invention, the hemming device includes a pre-indentation hemming mechanism;

[0045] In a further embodiment of the present invention, the pre-indentation and folding mechanism comprises a paper feeding guide wheel, an indentation roller group, a pre-folding roller group and a folding pressing wheel group which are arranged in sequence;

[0046] In a further embodiment of the present invention, the creasing roller assembly includes an upper creasing roller and a lower creasing roller cooperating with the upper creasing roller, a creasing knife is provided on the side of the upper creasing roller, and a creasing groove is provided on the side of the lower creasing roller, the creasing knife and the creasing groove are arranged opposite to and cooperate with each other, and both the creasing knife and the creasing groove are extended along the circumference of the lower creasing roller;

[0047] In a further embodiment of the present invention, the pre-folding roller assembly includes an upper pre-folding roller and a lower pre-folding roller cooperating with the upper pre-folding roller, the upper pre-folding roller is provided with an upper bevel portion corresponding to the side edge of the insulating paper, and the lower pre-folding roller is provided with a lower bevel portion cooperating with the upper bevel portion, and both the upper bevel portion and the lower bevel portion extend in the circumferential direction;

[0048] In a further embodiment of the present invention, the folding and pressing wheel assembly includes an upper folding and pressing wheel and a lower folding and pressing wheel. The upper folding and pressing wheel is provided with a rolling cone at the side edge corresponding to the insulating paper. The lower folding and pressing wheel is provided with a clearance portion corresponding to the rolling cone. The rolling cone is partially located in the clearance portion. A folding interval is formed between the inner end surface of the rolling cone and the lower folding and pressing wheel.

[0049] In a further embodiment of the present invention, the pre-folding roller assembly and the folding and pressing wheel assembly are both provided with grooves for avoiding indentations on the insulating paper.

[0050] In a further embodiment of the present invention, the folding device further includes a secondary folding mechanism;

[0051] In a further embodiment of the present invention, the secondary folding mechanism includes a folding positioning die, a folding pressing block provided on the side of the folding positioning die, and a folding driving device connected to the folding pressing block and used to drive the folding pressing block to press toward the folding positioning die, and a folding heater is provided on the folding pressing block;

[0052] In a further embodiment of the present invention, the automatic insulating paper inserting machine further comprises a corner cutting mechanism and a paper holder for loading a whole roll of insulating paper;

[0053] In a further embodiment of the present invention, the corner cutting mechanism includes a corner cutting sliding seat, a corner cutting knife provided on the corner cutting sliding seat, a paper scrap discharge pipe provided on the corner cutting sliding seat and located below the corner cutting knife, and a corner cutting drive device for driving the corner cutting sliding seat to operate. When the corner cutting drive device operates, it drives the corner cutting knife to cut the end portion of the side surface of the insulating paper.

[0054] In a further embodiment of the present invention, the paper feeding device includes an upper conveying wheel and a lower conveying wheel located on the rear side of the paper support, and a first paper feeding device for conveying insulating paper is formed between the upper conveying wheel and the lower conveying wheel;

[0055] In a further embodiment of the present invention, the paper feeding device includes a paper feeding driving wheel and a paper feeding driven wheel located above the paper feeding driving wheel, and a second paper feeding device for feeding insulating paper is formed between the paper feeding driving wheel and the paper feeding driven wheel;

[0056] In a further embodiment of the present invention, an upper conveying guide wheel is provided above the upper conveying wheel, a lower conveying guide wheel is provided outside the upper conveying guide wheel, and the lower conveying guide wheel is located below the upper conveying guide wheel. A conveying buffer section is formed between the upper conveying guide wheel and the lower conveying guide wheel for conveying connection with the folding device and the second conveying gap.

[0057] In a further embodiment of the present invention, the paper support, the first paper feeding device, the conveying buffer section, the folding device, the second paper feeding device, the paper pushing mechanism, the forming mold mechanism and the stator mechanism are arranged in sequence;

[0058] In a further embodiment of the present invention, a paper cutting mechanism is provided on one side of the paper pushing mechanism, and a preheating device is provided between the conveying buffer section and the folding device. The insulating paper passes through the first paper feeding device, the conveying buffer section, the preheating device, the folding device, and the second paper feeding device in sequence and enters the forming mold mechanism. The paper pushing mechanism pushes the shaped insulating paper into the stator located in the stator mechanism.

[0059] The beneficial effects of the present invention are as follows:

[0060] 1. Improve production efficiency. The automatic insulation paper inserting machine can complete the cutting, folding, and inserting of insulation paper at a speed far higher than manual operation, significantly shortening the production cycle. The equipment can operate 24 hours a day, avoiding the fatigue and intermittent problems of manual operation, and greatly improving production efficiency.

[0061] 2. Improve product quality. The automatic insulation paper inserter precisely inserts insulation paper into the stator slots, ensuring consistent placement and depth of each piece. Automated operation eliminates manual errors caused by technical differences or fatigue, significantly reducing product defect rates. The equipment strictly adheres to preset parameters, ensuring highly consistent insulation paper insertion quality for every stator.

[0062] 3. Reduce production costs and labor costs: Automated equipment reduces reliance on manual operations and reduces labor costs. Reduce material waste: Through precise cutting and optimized design, the equipment can maximize the use of insulation paper materials and reduce waste.

[0063] 4. Reduce rework rate: The high-quality production process reduces rework and scrap caused by unqualified insulation paper insertion, further saving costs.

[0064] 5. To enhance production flexibility and enable rapid changeovers, the automatic insulation paper inserter is equipped with an adjustment frame for quick assembly and disassembly of the indexing die, enabling rapid adaptation to the production needs of different stator models. Damaged indexing dies can also be replaced. Multi-specification compatibility: By replacing indexing dies of varying specifications and models and guide wheels with varying outer diameters, the machine can handle stators of varying sizes and shapes, meeting diverse production needs.

[0065] 6. Improved working environment and reduced manual operation risks: Automated equipment reduces workers' exposure to sharp edges and dust, lowering the risk of workplace injuries. Improved environmental friendliness: Equipment is often equipped with dust collection and waste disposal systems, such as a paper scrap discharge pipe and a collection box connected to the pipe, reducing environmental pollution during the production process.

[0066] 7. Reduce labor intensity: Workers are freed from heavy manual operations and turn to equipment monitoring and maintenance, making the working environment more comfortable.

[0067] 8. Achieving intelligence and data-driven growth through real-time monitoring and feedback. Equipped with sensors and a visual system, the equipment monitors the quality of insulation paper insertion in real time and provides prompt feedback on any anomalies. Through data collection and analysis, companies can optimize production processes and improve production management.

[0068] The beneficial technical benefits of the automatic insulation paper inserting machine are reflected in production efficiency, product quality, cost control, production flexibility, improved working environment, and intelligent level. It not only solves many pain points in traditional manual operations but also provides strong technical support for the automation, intelligentization, and sustainable development of the motor manufacturing industry. With the continuous advancement of technology, the automatic insulation paper inserting machine will play an even more important role in the future, driving the entire industry to a higher level. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 This is a schematic structural diagram of an automatic insulating paper inserting machine in one embodiment of the present invention.

[0070] Figure 2 This is a schematic diagram of another structural position of the automatic insulating paper inserting machine in one embodiment of the present invention.

[0071] Figure 3 Schematic diagram of the structure of the paper pushing mechanism in one embodiment of the present invention.

[0072] Figure 4 FIG. 2 is a schematic diagram of another structural orientation of the paper pushing mechanism in one embodiment of the present invention.

[0073] Figure 5 Schematic diagram of the structure of the forming mold mechanism in one embodiment of the present invention.

[0074] Figure 6 This is a schematic diagram of another structural orientation of the forming mold mechanism in one embodiment of the present invention.

[0075] Figure 7 for Figure 6 A partial enlarged view.

[0076] Figure 8 Schematic diagram of the structure of the stator mechanism in one embodiment of the present invention.

[0077] Figure 9 Schematic diagram of another orientation structure of the stator mechanism in one embodiment of the present invention.

[0078] Figure 10 The figure is a schematic structural diagram of a paper feeding driving wheel and a paper feeding driven wheel according to an embodiment of the present invention.

[0079] Figure 11 This is a schematic structural diagram of another orientation of the paper feeding driving wheel and the paper feeding driven wheel according to an embodiment of the present invention.

[0080] Figure 12 It is a schematic diagram of the three-dimensional structure of a folding device according to an embodiment of the present invention.

[0081] Figure 13 It is a schematic plan view of the structure of a folding device according to an embodiment of the present invention.

[0082] Figure 14 This is a schematic planar structural diagram of another orientation of the folding device according to an embodiment of the present invention.

[0083] Figure 15 The figure is a schematic structural diagram of a pre-folding roller assembly according to an embodiment of the present invention.

[0084] Figure 16 It is a structural schematic diagram of a secondary folding mechanism according to an embodiment of the present invention.

[0085] Figure 17 Schematic diagram of the structure of the angle cutting mechanism according to one embodiment of the present invention.

[0086] Figure 18 This is a schematic diagram of another structural orientation of the angle cutting mechanism according to an embodiment of the present invention.

[0087] Figure 19 The figure is a schematic three-dimensional structural diagram of the paper pushing action of the paper pushing mechanism according to an embodiment of the present invention.

[0088] Figure 20 Schematic diagram of the cross-sectional structure of the paper pushing mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0089] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0090] like Figures 1-20 As shown,

[0091] An automatic insulating paper inserting machine for a motor stator, comprising:

[0092] Body 1;

[0093] A paper feeding device 2, the paper feeding device 2 is used to feed insulating paper 9;

[0094] A folding device 3, which is used to fold the insulating paper 9 so as to subsequently shape the insulating paper 9;

[0095] A forming die mechanism 4, which is used to perform final shaping on the insulating paper 9 processed by the folding device 3;

[0096] A stator mechanism 5, which is used to load and position the stator;

[0097] A paper pushing mechanism 6 is used to push the insulating paper 9 shaped by the forming die mechanism 4 into the slots of the stator;

[0098] The paper feeding device 2 , the folding device 3 , the forming die mechanism 4 , the stator mechanism 5 , and the paper pushing mechanism 6 are all arranged on the machine body 1 .

[0099] The forming die mechanism 4 includes:

[0100] An intermediate forming die 41, wherein the intermediate forming die 41 is used to receive the insulating paper 9 conveyed to the intermediate forming die 41, and the intermediate forming die 41 is fixedly arranged on the forming die mechanism 4 of the machine body 1;

[0101] The side forming mold 42 is located on the side of the middle forming mold 41 and is used to press against the side of the middle forming mold 41 to shape the side of the insulating paper 9;

[0102] A lower forming die 43 is located below the middle forming die 41 and is used to press against the lower portion of the middle forming die 41 to shape the lower portion of the insulating paper 9;

[0103] An upper forming die 44 is located above the middle forming die 41 and is used to press against the upper portion of the middle forming die 41 to shape the upper portion of the insulating paper 9;

[0104] The side forming mold 42, the lower forming mold 43, and the upper forming mold 44 are respectively connected to a forming drive device 46, so that the side forming mold 42 can move back and forth in the horizontal direction to press toward the middle forming mold 41 or away from the middle forming mold 41, and the lower forming mold 43 and the upper forming mold 44 can move back and forth up and down to press toward the middle forming mold 41 or away from the middle forming mold 41.

[0105] The upper forming die 44 is provided with an upper groove 441 opposite to the middle forming die 41 , and the inner top surface of the upper groove 441 and the upper portion of the middle forming die 41 opposite to the upper groove 441 are respectively provided with arc-shaped surface portions 411 that cooperate with each other;

[0106] The side of the middle forming mold 41 and the side of the side forming mold 42 corresponding to the side of the middle forming mold 41 are respectively provided with a first inclined surface 412 that matches each other, and the horizontal distance of the inclined surface from the vertical bisector of the middle forming mold 41 gradually decreases from top to bottom;

[0107] A shaping groove 413 is provided at the bottom of the intermediate forming die 41, and a boss 431 is provided at the top of the lower forming die 43 corresponding to the shaping groove 413. When the lower forming die 43 moves upward, the boss 431 extends into the shaping groove 413. Second inclined surfaces 414 that cooperate with each other are respectively provided on both sides of the lower opening of the shaping groove 413 of the intermediate forming die 41 and on the outer periphery of the lower part of the boss on the lower forming die 43. The horizontal distance of the second inclined surface 414 from the vertical bisector of the intermediate forming die 41 gradually increases from top to bottom.

[0108] In one embodiment of the present invention, the molding drive device 46 includes a side molding die driving cylinder 461 that is transmission-connected to the side molding die 42, side molding dies 42 are provided on the left and right sides of the middle molding die 41, and a side molding die driving cylinder 461 that is transmission-connected to the side molding die 42, and the molding drive device 46 includes an upper molding die driving cylinder 462 that is transmission-connected to the upper molding die 44, and a lower molding die driving cylinder 463 that is transmission-connected to the lower molding die 43.

[0109] The paper pushing mechanism 6 includes a guide seat 61, a movable seat 62, a paper pushing rod 63 and a paper pushing driving device 64;

[0110] The guide seat 61 is provided on the machine body 1, the movable seat 62 is movably provided on the guide seat 61, the paper pushing rod 63 is fixedly provided on the movable seat 62, and the output shaft of the paper pushing driving device 64 is transmission-connected with the movable seat 62. When the paper pushing driving device 64 drives the movable seat 62 and the paper pushing rod 63 to move toward the forming die mechanism 4, the movable seat 62 drives the paper pushing rod 63 to slide on the guide seat 61, and the paper pushing rod 63 pushes the insulating paper 9 on the intermediate forming die 41 into the slot of the stator;

[0111] The forming die mechanism 4 is provided with a first avoidance groove 45 for the paper push rod 63 to pass through, and the middle forming die 41 , the upper forming die 44 and the side forming die 42 are respectively provided with a first avoidance groove 45 .

[0112] The stator mechanism 5 includes an indexing die plate 51 and a die plate driving device for driving the indexing die plate 51 to rotate;

[0113] The indexing die plate 51 is provided with a positioning platform 511 for mounting the stator and a plurality of paper insertion guide modules 512 located on the periphery of the positioning platform 511 and evenly spaced along the circumference. The stator is mounted on the positioning platform 511, and the plurality of paper insertion guide modules 512 correspond one-to-one to the slots on the stator. The paper insertion guide modules 512 extend into the corresponding stator slots.

[0114] The stator mechanism 5 includes a guide wheel assembly for positioning the indexing die plate 51;

[0115] The guide wheel assembly includes three guide wheels 52 rotatably mounted on the machine body 1 and arranged circumferentially and spaced apart around the periphery of the indexing die plate 51 to support and define the vertical and horizontal positions of the indexing die plate 51. An annular groove 521 is provided on the side of the guide wheel 52, and the edge of the indexing die plate 51 is disposed within the annular groove 521.

[0116] The guide wheel assembly also includes an adjustment frame 53 for quickly disassembling and assembling the indexing die plate 51. At least one of the guide wheels 52 is equipped with an adjustment frame 53, and the guide wheel 52 is rotatably mounted on the adjustment frame 53. The adjustment frame 53 is movably mounted on the machine body 1 so that when the adjustment frame 53 is moved, the guide wheel 52 can be moved away from or closer to the indexing die plate 51. The machine body 1 is provided with a locking assembly 56 for locking and releasing the adjustment frame 53, so that the adjustment frame 53 is locked on the machine body 1. The locking assembly 56 releases the force of locking the adjustment frame 53 to enable the adjustment frame 53 to move on the machine body 1.

[0117] In one embodiment of the present invention, when the indexing die plate 51 rotates, the edge of the indexing die plate 51 is positioned in three circumferentially distributed annular grooves 521 to prevent the indexing die plate 51 from swinging left and right when rotating.

[0118] In one embodiment of the present invention, one end of the adjustment frame 53 is rotatably set on the body 1 through a rotating shaft, and the other end of the adjustment frame 53 is provided with an inverted U-shaped groove. The locking assembly 56 includes a locking screw and a locking nut. The locking screw is inserted into the U-shaped groove and the fixed plate of the body 1, and the locking screw and the locking nut cooperate to lock the adjustment frame 53. When the dividing die 51 needs to be removed, the locking screw is rotated, and the adjustment frame 53 can be moved on the body 1. The U-shaped groove of the adjustment frame 53 is disengaged from the locking screw, and the guide wheel 52 is away from the dividing die 51. In this way, the dividing die 51 can be removed and replaced. When stators with different outer diameters need to be installed, since the outer diameters of the dividing die 51 are different, guide wheels 52 with different outer diameters can be replaced.

[0119] The indexing die plate 51 is provided with a driven gear 513, and the die plate driving device includes a die plate driving motor 54 and a gear set 55 connected to the output end of the die plate driving motor 54. The gear set 55 is in driving connection with the driven gear 513 on the indexing die plate 51;

[0120] The die plate driving motor 54 drives the indexing die plate 51 and the stator on the indexing die plate 51 to rotate. Every time the stator rotates to a corresponding position angle, the paper pushing mechanism 6 inserts the shaped insulating paper 9 into the corresponding slot of the stator.

[0121] In one embodiment of the present invention, the die plate driving motor 54 drives the indexing die plate 51 through gears to rotate each time at a corresponding angle. The slot of the stator corresponds to the middle forming die 41 of the forming die mechanism 4. When the paper pushing drive device 64 drives the paper pushing rod 63 to move toward the forming die mechanism 4, the paper pushing rod 63 pushes the insulating paper 9 on the middle forming die 41 into the slot of the stator. After the insulating paper 9 is shaped, the side forming die driving cylinder 461 drives the side forming die 42 away from the middle forming die 41, and the upper forming die driving cylinder 462 drives the upper forming die 44 away Leaving the middle forming die 41, the lower forming die driving cylinder 463 drives the lower forming die 43 away from the middle forming die 41, and the shaped insulating paper 9 is positioned on the middle forming die 41, waiting to be pushed by the paper pushing mechanism 6. Since the paper pushing rod 63 of the paper pushing mechanism 6 ensures that the insulating paper 9 is inserted into the slot of the stator, the middle forming die 41, the upper forming die 44, and the side forming die 42 are respectively provided with a first avoidance groove 45. The paper pushing rod 63 extends out of the corresponding first avoidance groove 45 and pushes the insulating paper 9 along the corresponding paper insertion guide module 512 to be inserted into the slot of the stator.

[0122] In one embodiment of the present invention, the paper pushing mechanism 6 is provided with a paper pushing rod 63 corresponding to each first avoiding groove 45 .

[0123] The stator mechanism 5 further includes a movable positioning assembly 10 for positioning the stator;

[0124] The movable positioning assembly includes a swing arm cylinder 101, a transmission swing arm 103 and a positioning swing arm 104 provided on the body 1. The swing arm cylinder 101 is provided with a swing arm cylinder telescopic rod 102. The first end of the transmission swing arm 103 is hinged to the end of the swing arm cylinder telescopic rod 102 away from the swing arm cylinder 101. The first end of the positioning swing arm 104 is connected to the second end of the transmission swing arm 103.

[0125] The first end of the positioning swing arm 104 and the second end of the transmission swing arm 103 are locked and connected by a shaft 107 and operate synchronously. The shaft 107 is rotatably set on the body 1. The positioning swing arm 104 is provided with a pressure cover 105 for pressing tightly on the end of the stator and a positioning cylinder 106 for driving the pressure cover 105 to move. The shaft 107 is located outside the guide wheel 52. The first distance between the axis of the shaft 107 and the center of the pressure cover 105 is L1, and the second distance between the axis of the shaft 107 and the center of the positioning platform 511 is L2. L1=L2, ensuring that after the positioning swing arm 104 swings, the pressure cover 105 can be aligned with the stator.

[0126] A buffer cylinder 108 is provided on the body 1 below the corresponding transmission swing arm 103. The buffer cylinder 108 is provided with a buffer cylinder telescopic rod 109 acting on the side of the transmission swing arm 103. The buffer cylinder 108 can prevent the positioning swing arm 104 from swinging down quickly when the transmission swing arm 103 swings upward. When the transmission swing arm 103 swings upward to the corresponding position, the buffer cylinder telescopic rod 109 of the buffer cylinder 108 supports the transmission swing arm 103 to prevent the transmission swing arm 103 from falling accidentally, thereby improving operational safety during the process of taking and placing the stator on the dividing die plate 51.

[0127] The stator is installed on the positioning platform 511 of the indexing die 51, and the swing arm cylinder 101 drives the transmission swing arm 103 to drive the positioning swing arm 104 to swing close to the indexing die 51. The positioning swing arm 104 swings to the corresponding position angle, and the positioning cylinder 106 drives the pressure cover 105 to be positioned on the outside of the stator so that the stator is positioned on the positioning platform 511 on which the indexing die 51 is installed; after the stator completes the insertion of the insulating paper 9, the positioning cylinder 106 drives the pressure cover 105 to reset, and the swing arm cylinder 101 drives the transmission swing arm 103 to drive the positioning swing arm 104 to swing away from the indexing die 51 and reset, so as to remove the stator from the positioning platform 511 of the indexing die 51.

[0128] The paper feeding device 2 includes a paper feeding driving wheel 21, a paper feeding driven wheel 22 located above the paper feeding driving wheel 21, and a paper feeding driving device 24 for driving the paper feeding driving wheel 21 to operate. The paper feeding driving wheel 21 and the paper feeding driven wheel 22 are provided with gear portions 23 that cooperate with each other. The gear portion 23 of the paper feeding driving wheel 21 is transmission-connected to the output end of the paper feeding driving device 24. A channel for conveying insulating paper 9 is formed between the paper feeding driving wheel 21 and the paper feeding driven wheel 22.

[0129] The folding device 3 includes a pre-indentation folding mechanism 31;

[0130] The pre-indentation and folding mechanism 31 includes a paper feeding guide wheel 311, an indentation roller group 312, a pre-folding roller group 313 and a folding pressing wheel group 314 arranged in sequence;

[0131] The creasing roller assembly 312 includes an upper creasing roller 312A and a lower creasing roller 312B that cooperates with the upper creasing roller 312A. A creasing blade 3121 is provided on the side of the upper creasing roller 312A, and a creasing groove 3122 is provided on the side of the lower creasing roller 312B. The creasing blade 3121 and the creasing groove 3122 are arranged opposite to and cooperate with each other. Both the creasing blade 3121 and the creasing groove 3122 extend circumferentially along the lower creasing roller 312B.

[0132] The pre-folding roller assembly 313 includes an upper pre-folding roller 313A and a lower pre-folding roller 313B that cooperates with the upper pre-folding roller 313A. The upper pre-folding roller 313A is provided with an upper inclined portion 3131 corresponding to the side edge of the insulating paper 9, and the lower pre-folding roller 313B is provided with a lower inclined portion 3132 that cooperates with the upper inclined portion 3131. Both the upper inclined portion 3131 and the lower inclined portion 3132 extend in the circumferential direction.

[0133] The folding and pressing wheel group 314 includes an upper folding and pressing wheel 314A and a lower folding and pressing wheel 314B. The upper folding and pressing wheel 314A is provided with a rolling cone 3141 at the side edge corresponding to the insulating paper 9. The lower folding and pressing wheel 314B is provided with a clearance portion 3142 corresponding to the rolling cone 3141. The rolling cone 3141 is partially located in the clearance portion 3142. The inner end surface of the rolling cone 3141 and the lower folding and pressing wheel 314B constitute a folding interval.

[0134] The pre-folding roller assembly 313 and the folding pressing wheel assembly 314 are both provided with slots 315 for avoiding indentations on the insulating paper 9 .

[0135] The folding device 3 further includes a secondary folding mechanism 32;

[0136] The secondary folding mechanism 32 includes a folding positioning die 321, a folding pressing block 322 provided on the side of the folding positioning die 321, and a folding driving device 323 connected to the folding pressing block 322 and used to drive the folding pressing block 322 to press against the folding positioning die 321. A folding heater 324 is provided on the folding pressing block 322.

[0137] In an embodiment of the present invention, the folded heater 324 is a heating tube, and the folded pressing block 322 is provided with a plug-in cavity for inserting the heating tube. The electrical connection terminal of the heating tube is located on the outside of the folded pressing block 322. When the heating tube generates heat, it transfers heat to the folded pressing block 322.

[0138] By providing the pre-folding roller group 313 and the secondary folding mechanism 32, it is convenient to shape the folded insulating paper 9, so that the shaped insulating paper 9 can maintain the shaped state, and is not prone to reset deformation, thereby improving the consistency of the insulating paper 9 and the stator assembly.

[0139] The automatic insulating paper inserting machine further comprises a corner cutting mechanism 7 and a paper support 8 for loading a whole roll of insulating paper 9;

[0140] In the embodiment of the present invention, a rotor shaft is provided on the paper support 8 for inserting a whole roll of insulating paper 9. When the insulating paper 9 is being transported, the rotor shaft drives the whole roll of insulating paper 9 to rotate.

[0141] The corner cutting mechanism 7 includes a corner cutting sliding seat 71, a corner cutting knife 72 provided on the corner cutting sliding seat 71, a paper scrap discharge pipe 73 provided on the corner cutting sliding seat 71 and located below the corner cutting knife 72, and a corner cutting drive device 74 for driving the corner cutting sliding seat 71 to operate. When the corner cutting drive device 74 is in operation, it drives the corner cutting knife 72 to cut the end portion of the side surface of the insulating paper 9;

[0142] The paper feeding device 2 includes an upper conveying wheel 26 and a lower conveying wheel 27 located on the rear side of the paper support 8, and a first paper feeding device for conveying the insulating paper 9 is formed between the upper conveying wheel 26 and the lower conveying wheel 27;

[0143] The paper feeding device 2 includes a paper feeding driving wheel 21 and a paper feeding driven wheel 22 located above the paper feeding driving wheel 21. A second paper feeding device for conveying insulating paper 9 is formed between the paper feeding driving wheel 21 and the paper feeding driven wheel 22.

[0144] An upper conveying guide wheel is provided above the upper conveying wheel 26, and a lower conveying guide wheel 28 is provided outside the upper conveying guide wheel. The lower conveying guide wheel 28 is located below the upper conveying guide wheel. A conveying buffer section is formed between the upper conveying guide wheel and the lower conveying guide wheel 28 for conveying connection with the folding device 3 and the second conveying gap;

[0145] The paper support 8, the first paper feeding device, the conveying buffer section, the folding device 3, the second paper feeding device, the paper pushing mechanism 6, the forming mold mechanism 4 and the stator mechanism 5 are arranged in sequence;

[0146] The conveying buffer section plays a buffering role. When the insulating paper 9 is conveyed too fast, part of the insulating paper 9 stays on the conveying buffer section. When the insulating paper 9 is shaped and inserted into the slot of the stator, the insulating paper 9 in the conveying buffer section continues to be conveyed forward, ensuring the continuous operation of the equipment.

[0147] A paper cutting mechanism 25 is provided on one side of the paper pushing mechanism 6, and a preheating device 11 is provided between the conveying buffer section and the folding device 3. The insulating paper 9 passes through the first paper feeding device, the conveying buffer section, the preheating device 11, the folding device 3, and the second paper feeding device in sequence and enters the forming mold mechanism 4. The paper pushing mechanism 6 pushes the shaped insulating paper 9 into the stator located on the stator mechanism 5.

[0148] In the embodiment of the present invention, the preheating device 11 includes a preheating block and a heating tube arranged in the preheating block.

[0149] The working process of the present invention is as follows:

[0150] The insulating paper 9 enters the pre-indentation and folding mechanism 31 under the action of the first paper feeding device for the first indentation. The insulating paper 9 then enters the secondary folding mechanism 32. After the folding is completed, the insulating paper 9 enters the forming die mechanism 4 under the action of the second paper feeding device. Since the insulating paper 9 needs to be separated from the conveyed insulating paper 9, a paper cutting mechanism 25 is required. This is the only way to feed the insulating paper 9 of the corresponding length onto the forming die mechanism 4. When the indexing die plate 51 rotates to the corresponding position angle, the paper pushing mechanism 6 inserts the shaped insulating paper 9 into the slot of the stator. After the insertion is completed, the indexing die plate 51 rotates to the next corresponding position angle, thereby inserting the insulating paper 9 into each slot of the stator.

[0151] In this embodiment, the paper cutting mechanism 25 includes a cutter and a cutter cylinder transmission-connected to the cutter.

[0152] The above is a preferred embodiment of the present invention, which shows and describes 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 above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. An automatic insulation paper inserting machine for a motor stator, characterized in that: include: Body (1); A paper feeding device (2), the paper feeding device (2) being used to feed insulating paper (9); A folding device (3), the folding device (3) is used to fold the insulating paper (9) so as to subsequently shape the insulating paper (9); A forming die mechanism (4), the forming die mechanism (4) being used to perform final shaping on the insulating paper (9) processed by the folding device (3); A stator mechanism (5), the stator mechanism (5) being used to load and position the stator; A paper pushing mechanism (6), the paper pushing mechanism (6) is used to push the insulating paper (9) shaped by the forming die mechanism (4) into the slot of the stator; The paper feeding device (2), the folding device (3), the forming die mechanism (4), the stator mechanism (5), and the paper pushing mechanism (6) are all arranged on the machine body (1); The stator mechanism (5) comprises a movable positioning assembly (10) for positioning the stator; The movable positioning assembly comprises a swing arm cylinder (101), a transmission swing arm (103) and a positioning swing arm (104) arranged on the body (1); a swing arm cylinder telescopic rod (102) is provided on the swing arm cylinder (101); a first end of the transmission swing arm (103) is hinged to an end of the swing arm cylinder telescopic rod (102) away from the swing arm cylinder (101); and a first end of the positioning swing arm (104) is connected to a second end of the transmission swing arm (103); The stator mechanism (5) further comprises a dividing die plate (51) and a die plate driving device for driving the dividing die plate (51) to rotate; The stator mechanism (5) includes a guide wheel assembly for positioning the indexing die plate (51); The guide wheel assembly includes a guide wheel (52) rotatably arranged on the machine body (1); The first end of the positioning swing arm (104) and the second end of the transmission swing arm (103) are locked and connected via a shaft (107) and operate synchronously. The shaft (107) is rotatably arranged on the machine body (1). The positioning swing arm (104) is provided with a pressure cover (105) for pressing tightly against the end of the stator and a positioning cylinder (106) for driving the pressure cover (105) to move. The shaft (107) is located outside the guide wheel (52). A first distance between the axis of the shaft (107) and the center of the pressure cover (105) is L1. A second distance between the axis of the shaft (107) and the center of the positioning platform (511) is L2, and L1=L2. A buffer cylinder (108) is provided on the machine body (1) below the corresponding transmission swing arm (103), and the buffer cylinder (108) is provided with a buffer cylinder telescopic rod (109) acting on the side of the transmission swing arm (103); The stator is mounted on the positioning platform (511) of the indexing die plate (51), the swing arm cylinder (101) drives the transmission swing arm (103) to drive the positioning swing arm (104) to swing in the direction close to the indexing die plate (51), the positioning swing arm (104) swings to a corresponding position angle, and the positioning cylinder (106) drives the pressure cover (105) to be positioned on the outer side of the stator, so that the stator is positioned on the positioning platform (511) on which the indexing die plate (51) is installed; after the stator completes the insertion of the insulating paper (9), the positioning cylinder (106) drives the pressure cover (105) to reset, and the swing arm cylinder (101) drives the transmission swing arm (103) to drive the positioning swing arm (104) to swing away from the indexing die plate (51) and reset, so as to remove the stator from the positioning platform (511) of the indexing die plate (51).

2. The automatic insulation paper inserting machine for motor stators according to claim 1, characterized in that: The forming die mechanism (4) comprises: An intermediate forming mold (41), the intermediate forming mold (41) being used to receive the insulating paper (9) conveyed to the intermediate forming mold (41), the intermediate forming mold (41) being fixedly arranged on the forming mold mechanism (4) of the machine body (1); A side forming die (42), the side forming die (42) being located on the side of the middle forming die (41), and the side forming die (42) being used to press against the side of the middle forming die (41) to shape the side of the insulating paper (9); A lower forming die (43), the lower forming die (43) being located below the middle forming die (41), and the lower forming die (43) being used to press against the lower portion of the middle forming die (41) to shape the lower portion of the insulating paper (9); An upper forming die (44), the upper forming die (44) being located above the middle forming die (41), and the upper forming die (44) being used to press against the upper portion of the middle forming die (41) to shape the upper portion of the insulating paper (9); The side forming mold (42), the lower forming mold (43), and the upper forming mold (44) are respectively connected to a forming drive device (46), so that the side forming mold (42) can move back and forth in the horizontal direction to press toward the middle forming mold (41) or away from the middle forming mold (41), and the lower forming mold (43) and the upper forming mold (44) can move back and forth up and down to press toward the middle forming mold (41) or away from the middle forming mold (41).

3. The automatic insulation paper inserting machine for motor stators according to claim 2, characterized in that: The upper forming die (44) is provided with an upper groove (441) opposite to the middle forming die (41), and the inner top surface of the upper groove (441) and the upper portion of the middle forming die (41) opposite to the upper groove (441) are respectively provided with arc-shaped surface portions (411) that cooperate with each other; The side of the middle forming mold (41) and the side of the side forming mold (42) corresponding to the side of the middle forming mold (41) are respectively provided with mutually matching first inclined surfaces (412), and the horizontal distance of the inclined surfaces from the vertical bisector of the middle forming mold (41) gradually decreases from top to bottom; The bottom of the intermediate forming die (41) is provided with a shaping groove (413), and the top of the lower forming die (43) is provided with a boss (431) corresponding to the shaping groove (413). When the lower forming die (43) moves upward, the boss (431) extends into the shaping groove (413). Both sides of the lower opening of the shaping groove (413) of the intermediate forming die (41) and the outer periphery of the lower part of the boss on the lower forming die (43) are respectively provided with second inclined surfaces (414) that match each other. The horizontal distance of the second inclined surface (414) from the vertical bisector of the intermediate forming die (41) gradually increases from top to bottom.

4. The automatic insulation paper inserting machine for motor stators according to claim 2, characterized in that: The paper pushing mechanism (6) includes a guide seat (61), a movable seat (62), a paper pushing rod (63) and a paper pushing driving device (64); The guide seat (61) is arranged on the machine body (1), the movable seat (62) is movably arranged on the guide seat (61), the paper pushing rod (63) is fixedly arranged on the movable seat (62), the output shaft of the paper pushing driving device (64) is transmission-connected with the movable seat (62), and when the paper pushing driving device (64) drives the movable seat (62) and the paper pushing rod (63) to move toward the forming mold mechanism (4), the movable seat (62) drives the paper pushing rod (63) to slide on the guide seat (61), and the paper pushing rod (63) pushes the insulating paper (9) on the intermediate forming mold (41) into the slot of the stator; The forming die mechanism (4) is provided with a first air-avoiding groove (45) for the paper push rod (63) to pass through, and the middle forming die (41), the upper forming die (44), and the side forming die (42) are each provided with a first air-avoiding groove (45).

5. The automatic insulation paper inserting machine for motor stators according to claim 1, characterized in that: The indexing die plate (51) is provided with a plurality of paper insertion guide modules (512) located on the periphery of the positioning platform (511) and evenly spaced along the circumferential direction. The stator is mounted on the positioning platform (511). The plurality of paper insertion guide modules (512) correspond one-to-one to the slots on the stator, and the paper insertion guide modules (512) extend into the corresponding slots of the stator.

6. The automatic insulation paper inserting machine for motor stators according to claim 5, characterized in that: The guide wheels (52) are three in number and are arranged at intervals along the circumferential direction on the periphery of the indexing die plate (51) to support and define the vertical position and the horizontal position of the indexing die plate (51). An annular groove (521) is provided on the side of the guide wheel (52), and the edge of the indexing die plate (51) is arranged in the annular groove (521); The guide wheel assembly further includes an adjustment frame (53) for quickly disassembling and assembling the indexing die plate (51), at least one of the guide wheels (52) is provided with an adjustment frame (53), and the guide wheel (52) is rotatably arranged on the adjustment frame (53), the adjustment frame (53) is movably arranged on the machine body (1) so that when the adjustment frame (53) is moved, the guide wheel (52) can be moved away from the indexing die plate (51) or close to the indexing die plate (51), and a locking component (56) for locking and releasing the adjustment frame (53) is provided on the machine body (1) so that the adjustment frame (53) is locked on the machine body (1), and the locking component (56) releases the force of locking the adjustment frame (53) to realize the movement of the adjustment frame (53) on the machine body (1); The indexing die plate (51) is provided with a driven gear (513), and the die plate driving device includes a die plate driving motor (54), a gear set (55) connected to the output end of the die plate driving motor (54), and the gear set (55) is drivingly connected to the driven gear (513) on the indexing die plate (51); The die plate driving motor (54) drives the indexing die plate (51) and the stator located on the indexing die plate (51) to rotate. Each time the stator rotates to a corresponding position angle, the paper pushing mechanism (6) inserts the shaped insulating paper (9) into the corresponding slot of the stator.

7. The automatic insulation paper inserting machine for motor stators according to claim 1, characterized in that: The paper feeding device (2) comprises a paper feeding driving wheel (21) all arranged on the machine body (1), a paper feeding driven wheel (22) located above the paper feeding driving wheel (21), and a paper feeding driving device (24) for driving the paper feeding driving wheel (21) to operate. The paper feeding driving wheel (21) and the paper feeding driven wheel (22) are provided with gear parts (23) that cooperate with each other. The gear part (23) of the paper feeding driving wheel (21) is transmission-connected to the output end of the paper feeding driving device (24). A channel for conveying insulating paper (9) is formed between the paper feeding driving wheel (21) and the paper feeding driven wheel (22).

8. The automatic insulation paper inserting machine for motor stators according to claim 1, characterized in that: The folding device (3) comprises a pre-indentation folding mechanism (31); The pre-indentation and folding mechanism (31) comprises a paper feeding guide wheel (311), an indentation roller group (312), a pre-folding roller group (313), and a folding pressing wheel group (314) arranged in sequence; The indentation roller assembly (312) comprises an upper indentation roller (312A) and a lower indentation roller (312B) cooperating with the upper indentation roller (312A); an indentation knife (3121) is provided on the side of the upper indentation roller (312A); an indentation groove (3122) is provided on the side of the lower indentation roller (312B); the indentation knife (3121) and the indentation groove (3122) are arranged opposite to and cooperate with each other; both the indentation knife (3121) and the indentation groove (3122) are arranged to extend circumferentially along the lower indentation roller (312B); The pre-folding roller assembly (313) comprises an upper pre-folding roller (313A) and a lower pre-folding roller (313B) cooperating with the upper pre-folding roller (313A); an upper bevel portion (3131) is provided on the upper pre-folding roller (313A) at a side edge corresponding to the insulating paper (9); and a lower bevel portion (3132) is provided on the lower pre-folding roller (313B) cooperating with the upper bevel portion (3131); both the upper bevel portion (3131) and the lower bevel portion (3132) extend in the circumferential direction. The folding and pressing wheel assembly (314) comprises an upper folding and pressing wheel (314A) and a lower folding and pressing wheel (314B), wherein the upper folding and pressing wheel (314A) is provided with a rolling cone (3141) at the side edge corresponding to the insulating paper (9), and the lower folding and pressing wheel (314B) is provided with a clearance portion (3142) corresponding to the rolling cone (3141), wherein the rolling cone (3141) is partially located within the clearance portion (3142), and a folding interval is formed between the inner end surface of the rolling cone (3141) and the lower folding and pressing wheel (314B); The pre-folding roller assembly (313) and the folding pressing wheel assembly (314) are both provided with slots (315) for avoiding indentations on the insulating paper (9).

9. The automatic insulation paper inserting machine for motor stators according to claim 8, characterized in that: The folding device (3) further includes a secondary folding mechanism (32); The secondary folding mechanism (32) comprises a folding positioning die (321), a folding pressing block (322) arranged on the side of the folding positioning die (321), and a folding driving device (323) connected to the folding pressing block (322) and used to drive the folding pressing block (322) to press toward the folding positioning die (321), and a folding heater (324) is provided on the folding pressing block (322); The automatic insulating paper inserting machine further includes a corner cutting mechanism (7) and a paper support (8) for loading a whole roll of insulating paper (9); The corner cutting mechanism (7) comprises a corner cutting sliding seat (71), a corner cutting knife (72) arranged on the corner cutting sliding seat (71), a paper scrap discharge pipe (73) arranged on the corner cutting sliding seat (71) and located below the corner cutting knife (72), and a corner cutting drive device (74) for driving the corner cutting sliding seat (71) to operate. When the corner cutting drive device (74) operates, it drives the corner cutting knife (72) to cut the end portion of the side surface of the insulating paper (9); The paper feeding device (2) comprises an upper conveying wheel (26) and a lower conveying wheel (27) on the rear side of the paper support (8), wherein a first paper feeding device for conveying insulating paper (9) is formed between the upper conveying wheel (26) and the lower conveying wheel (27); The paper feeding device (2) comprises a paper feeding driving wheel (21) and a paper feeding driven wheel (22) located above the paper feeding driving wheel (21), wherein a second paper feeding device for conveying insulating paper (9) is formed between the paper feeding driving wheel (21) and the paper feeding driven wheel (22); An upper conveying guide wheel is provided above the upper conveying wheel (26), a lower conveying guide wheel (28) is provided outside the upper conveying guide wheel, and the lower conveying guide wheel (28) is located below the upper conveying guide wheel. A conveying buffer section is formed between the upper conveying guide wheel and the lower conveying guide wheel (28) for conveying connection with the folding device (3) and the second conveying gap; The paper support (8), the first paper feeding device, the conveying buffer section, the folding device (3), the second paper feeding device, the paper pushing mechanism (6), the forming die mechanism (4) and the stator mechanism (5) are arranged in sequence; A paper cutting mechanism (25) is provided on one side of the paper pushing mechanism (6), and a preheating device (11) is provided between the conveying buffer section and the folding device (3). The insulating paper (9) passes through the first paper feeding device, the conveying buffer section, the preheating device (11), the folding device (3), and the second paper feeding device in sequence and enters the forming die mechanism (4). The paper pushing mechanism (6) pushes the shaped insulating paper (9) and inserts it into the stator located on the stator mechanism (5).

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