A rotor core stacking device for new energy vehicle motors

Abstract

This invention discloses a rotor core stacking device for new energy vehicle motors, relating to the field of rotor core stacking technology. The stacking device includes a lower mold, a column, an upper mold, mold one, mold two, mold three, a blanking mold, a blanking opening, a delivery slot, rotor core chips, rivets, riveting slots, a rotating assembly, a supporting assembly, an air blowing assembly, and a pushing assembly. The soft contact during the blanking process is achieved through the pushing force of the blanking mold and the reaction force of the spring at the bottom of the tray, preventing damage to the electric push rod. Simultaneously, the 45-degree rotation of each rotor core chip stacked prevents damage to the edges of the blanking mold over long-term operation, ensuring that any small burrs and scratches on the finished rotor core chips are concentrated in a vertical line. During the reciprocating motion of the upper mold, the folding airbag sprays gas to clean the surface of the rotor core chips, and the airflow also removes heat from the surface of the blanking mold.

Description

Technical Field

[0001] This invention relates to the field of rotor core stacking technology, specifically a rotor core stacking device for new energy vehicle motors. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the drive motor, as a core power component, directly affects the energy efficiency and reliability of the entire vehicle. The rotor core, as the magnetic circuit carrier and mechanical support structure of the motor, must meet stringent requirements such as high power density, low loss, and high-speed performance.

[0003] In the production process of motor rotor core, silicon steel plates with an insulating coating are used as raw materials. After being leveled, the silicon steel plates are conveyed by a conveying mechanism to the upper and lower dies of the stamping die, and then stamped to form rotor core chips. In order to achieve automation, the stamping die is usually equipped with an automatic stacking device to stack the stamped rotor core chips into a rotor core of a certain thickness, so as to facilitate subsequent assembly with parts such as the shaft. However, under long-term operation of the stamping die, minor wear can easily occur at a certain edge of the die, resulting in small burrs and scratches on the edges of the stamped rotor core. As the rotor cores are continuously stacked, the small burrs and scratches on the finished rotor core are concentrated in a vertical line. This causes unstable centrifugal force when the rotor core is assembled with other components into a complete motor, affecting the quality of the motor. Furthermore, burrs or other impurities generated during the stamping process can easily mix between the cores, affecting the quality of the finished product. In addition, under long-term operation of the die, a large amount of heat can easily accumulate at the die-cutting die. If the heat is too high, it will damage the insulating coating on the surface of the silicon steel sheet during the stamping process.

[0004] To address this, a rotor core stacking device for new energy vehicle motors is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a rotor core stacking device for electric motors in new energy vehicles, so as to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rotor core stacking device for new energy vehicle motors, the stacking device comprising a lower mold, a column, an upper mold, mold one, mold two, mold three, a blanking die, a blanking opening, a delivery slot, rotor core chips, rivets, riveting slots, a rotating assembly, a supporting assembly, an air blowing assembly, and a pushing assembly; the column is provided with four sets of components fixedly connected to the four corners of the lower mold; the upper mold is slidably connected to the column; mold one, mold two, mold three, and the blanking die are all fixedly connected to the bottom surface of the upper mold, and the blanking opening and the delivery slot are both opened at the right end near the lower mold; mold three stamps rivets and riveting slots on the rotor core chips; the rotating assembly is located below the delivery slot; the rotor core chips are stacked on the supporting assembly; the supporting assembly is located at the blanking opening and connected to the rotating assembly. The components are fixedly connected; the air blowing component is set at the punching die; the pushing component is set in the delivery slot and slidably connected to the lower die; the punched rotor iron chips are received by the receiving component, and when each group of rotor iron chips is punched down to the thickness of the supporting component, the rotating component will rotate forty-five degrees, and at the same time the supporting component will descend by the height of one rotor iron chip, so that the top of the rotor iron chips on the supporting component is flush with the top surface of the lower die. During the stacking of rotor iron chips on the top of the supporting component, the rivets and rivet slots will be inserted, thereby realizing the stacking of rotor iron chips. When eight rotor iron chips are stacked, the supporting component will descend below the delivery slot. At this time, the stacked rotor iron chips will detach from the supporting component and be located in the delivery slot. Then the pushing component will start to push the rotor iron chips out of the delivery slot, thereby completing the production and stacking of this part of the rotor iron core.

[0007] Preferably, the rotating assembly includes a fixed frame, a fixed platform, a worm gear, a worm, a drive motor, a support ring, and an electric push rod; the fixed frame is fixedly connected below the discharge slot, the fixed platform is fixedly connected to the bottom end of the fixed frame, the worm gear is rotatably connected to the fixed platform, the worm is rotatably connected to the fixed platform and meshes with the worm gear, the drive motor is fixedly connected to the edge of the fixed platform, and the output shaft of the drive motor is fixedly connected to the worm, the support ring is fixedly connected to the center of the worm gear, and the electric push rod is slidably connected to the support ring; when the drive motor is started, the output shaft of the drive motor will drive the worm to rotate, the worm will drive the worm gear to rotate, and simultaneously drive the electric push rod to rotate.

[0008] Preferably, the electric push rod is further provided with a drive groove and a vertical groove, and a guide post is fixedly connected to the fixing frame; the drive groove is spirally formed on the outer peripheral wall of the electric push rod, and the drive groove encircles the outside of the electric push rod one revolution. The distance from the top end of the drive groove to the bottom end is equal to the height of the finished rotor core after stacking. The top end of the vertical groove is connected to the drive groove. The guide post is fixedly connected to the fixing frame, and the end of the guide post is slidably connected to the drive groove and the vertical groove. When the drive motor drives the worm gear to rotate clockwise by 45 degrees, the electric push rod will rotate by the same angle, and under the action of the guide post and the drive groove, the electric push rod will descend by the thickness of one iron chip.

[0009] Preferably, the discharge slot is further provided with a passage opening through which the supporting component can pass, and the diameter of the passage opening is smaller than the diameter of the rotor iron chip; when the passage opening of the supporting component is located below the passage opening, since the diameter of the rotor iron chip is larger than the passage opening, the rotor iron chip will be blocked and detached from the supporting component.

[0010] Preferably, the supporting assembly includes a chassis, a fixed column, a tray, a spring, and a groove; the chassis is fixedly connected to the top of the electric push rod, the fixed column is fixedly connected to the chassis and has multiple sets arranged in a ring array on the upper surface of the chassis, the tray is slidably connected to the fixed column, and the spring is sleeved on the outside of the fixed column; in the initial state, the guide column is located at the bottom end of the drive groove, at which time the top of the tray is flush with the top surface of the lower die. When the first set of rotor iron chips is pressed down at the punching opening, the pushing force of the punching die and the reaction force of the spring will cause... The bottom rivet of the rotor iron chip is inserted into the groove on the tray. At this time, the rotor iron chip will be temporarily fixed on the tray. After the blanking die rises, the tray will be pushed back by the spring force. At this time, the motor will drive the worm gear to rotate forty-five degrees. At the same time, with the cooperation of the guide column drive groove, the push rod will descend by the thickness of the rotor iron chip. After descending, the top surface of the rotor iron chip on the tray will be flush with the top surface of the lower die. Then, the upper and lower parts of the silicon steel plate that need to be blanked will move to the bottom of the blanking die. The above movement is repeated to complete the stacking of the rotor iron chips.

[0011] Preferably, the number of grooves is the same as the number of rivets, with eight sets in total. The rotor iron chips are inserted into the grooves through the rivets. When the worm gear rotates forty-five degrees, the tray descends by the height of one rotor iron chip. The drive groove covers the outer circumference of the electric push rod in one circle, and the height of the top and bottom of the drive groove is equal to the height of the eight sets of rotor iron chips stacked together. Therefore, when the worm gear rotates 360 degrees clockwise, the guide post will be located at the top of the drive groove, and the vertical groove will be located on the right side of the top of the drive groove, not coinciding with the top position.

[0012] Preferably, the air blowing assembly includes an air jet nozzle, a folding airbag, and a connecting pipe; the air jet nozzle is fixedly connected inside the blanking die, and the bottom of the air jet nozzle is flush with the bottom of the blanking die; there are two sets of folding airbags, which are respectively fitted onto the two sets of columns on the right side, and the top of the folding airbag is fixedly connected to the upper die and the bottom is fixedly connected to the lower die; the connecting pipe is connected to the air jet nozzle and the folding airbag; during the reciprocating motion of the upper die, the upper die will drive the folding airbag to continuously complete the closing action, so that the folding airbag is filled with air when the upper die rises and ejects gas when the upper die and the lower die approach each other.

[0013] Preferably, the pushing component includes a chute, a pusher block, and a telescopic cylinder; the chute is opened in the delivery slot, the pusher block is slidably connected to the chute, and the telescopic cylinder is fixedly installed on the side wall of the lower mold, and the output end of the telescopic cylinder is fixedly connected to the pusher block; after the rotor iron chip is stacked and detached from the tray, the telescopic cylinder can drive the pusher block to push the stacked rotor iron chip finished product out of the delivery slot.

[0014] Preferably, a recessed notch is also provided on the inner bottom surface of the delivery slot, and the width of the recessed notch is greater than the distance between two rivets symmetrically positioned on the center line of the rotor iron chip; when the stacked rotor iron chips are pushed out of the delivery slot, the riveting groove of the bottom rotor iron chip will pass through the recessed notch, thereby preventing obstruction during movement.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. During the reciprocating motion of the upper die, the upper die will drive the folding airbag to continuously complete the retraction and folding action. As the upper die rises, the folding airbag will be filled with air and the gas will be ejected when the upper die and lower die approach each other. The ejected gas can clean the surface of the rotor iron chip, preventing small burrs or other impurities from falling on the surface of the rotor iron chip. This would prevent impurities from getting stuck between the rotor iron chips during stacking, affecting product quality. In addition, the airflow can carry away the heat from the surface of the punching die, preventing heat accumulation and temperature rise, which could damage the insulation layer on the surface of the silicon steel sheet.

[0017] 2. By using the thrust of the blanking die and the reaction force of the spring at the bottom of the tray, the bottom rivet of the rotor iron chip is inserted into the groove on the tray, achieving soft contact during the blanking process of the blanking die. This prevents the rigid contact caused by the traditional method of directly driving the tray with the blanking die through electric push rods or hydraulic cylinders, which would damage the electric push rods or hydraulic cylinders when the blanking die descends.

[0018] 3. By lowering the tray by one rotor chip thickness with each rotation of the worm gear, it is ensured that each set of rotor chips is flush with the top surface of the lower die after stacking. This allows the next set of rotor cores to be directly stacked with the stacked rotor chips with zero gap during stamping, improving the stacking precision and accuracy. Furthermore, the method of rotating 45 degrees after stacking one rotor chip at a time ensures the misalignment of the next set of rotor chips with the rotor chips below, while simultaneously ensuring the insertion of rivets and rivet slots. This prevents the small burrs and scratches on the rotor chips of the finished product from converging in a vertical line when the edge of the stamping die is damaged during long-term operation. Even if there is minor damage to the die that is not visible to the naked eye, the small burrs and scratches on the rotor chips can be evenly distributed along the outer circumference of the finished rotor core, thus preventing the rotor core from generating unstable centrifugal force during rotation after being assembled with other components into a complete motor. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the overall appearance of the present invention;

[0020] Figure 2 This is a diagram showing the overall use of the silicon steel plate and the device of the present invention.

[0021] Figure 3 This is a rear perspective view of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the rotating component of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the rotating component and the supporting component of the present invention;

[0024] Figure 6 This is a bottom view of the blanking die of the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the air blowing assembly of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the driving component of the present invention;

[0027] Figure 9 This is a schematic diagram of the rotor iron chip stacked according to the present invention.

[0028] In the diagram: 1. Upper mold; 2. Column; 3. Lower mold; 31. Mold 1; 32. Mold 2; 33. Mold 3; 34. Punching die; 35. Punching opening; 36. Delivery slot; 361. Through port; 362. Recessed notch; 4. Rotor iron chip; 41. Rivet; 42. Riveting groove; 5. Rotating assembly; 51. Fixing frame; 511. Guide column; 52. Fixing platform; 53. Worm gear; 54. Worm; 55. Drive motor; 56. Support ring; 57. Electric actuator; 571. Drive groove; 572. Vertical groove; 6. Support assembly; 61. Chassis; 62. Fixing column; 63. Pallet; 64. Spring; 65. Groove; 7. Air blowing assembly; 71. Air jet; 72. Folding airbag; 73. Connecting pipe; 8. Pushing assembly; 81. Slide; 82. Push block; 83. Telescopic cylinder. Detailed Implementation

[0029] 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.

[0030] Please see Figures 1 to 9 This invention provides a rotor core stacking device for new energy vehicle motors, the technical solution of which is as follows:

[0031] Reference Figures 1 to 3 as well as Figure 9A rotor core stacking device for a new energy vehicle motor is disclosed. The stacking device includes a lower mold 3, a column 2, an upper mold 1, a first mold 31, a second mold 32, a third mold 33, a blanking die 34, a blanking opening 35, a delivery slot 36, rotor core chips 4, rivets 41, riveting grooves 42, a rotating assembly 5, a supporting assembly 6, an air blowing assembly 7, and a pushing assembly 8. The column 2 has four sets of components fixedly connected to the four corners of the lower mold 3. The upper mold 1 is slidably connected to the column 2. The first mold 31, the second mold 32, the third mold 33, and the blanking die 34 are all fixedly connected to the bottom surface of the upper mold 1. The blanking opening 35 and the delivery slot 36... All 6 are located near the right end of the lower mold 3; the mold 33 stamps rivets 41 and rivet grooves 42 on the rotor iron chip 4; the rotating component 5 is located below the delivery slot 36; the rotor iron chip 4 is stacked on the supporting component 6; the supporting component 6 is located at the blanking opening 35 and is fixedly connected to the rotating component 5; the air blowing component 7 is located at the blanking die 34; the pushing component 8 is located inside the delivery slot 36 and is slidably connected to the lower mold 3; in use, the hydraulic system above the upper mold 1 will drive the upper mold 1 to move up and down along the column 2, stamping the silicon steel sheet on the lower mold 3 to form the rotor iron chip 4. When the silicon steel sheet passes through die 31, it will be punched into eight sets of annular array heat dissipation holes. When the silicon steel sheet passes through die 32, eight sets of annular array V-shaped magnetic grooves will be added around the heat dissipation holes. When it passes through die 33, eight sets of recessed riveting grooves 42 will be punched into the previous structure. The protruding part of the riveting groove 42 is the rivet 41. Then, when it passes through the blanking die 34, all the patterns punched in the previous die will be punched out of the silicon steel sheet to form rotor iron chips 4. The punched rotor iron chips 4 are received by the receiving component. After each set of rotor iron chips 4 is punched down and falls into the supporting component 6, the rotating component 5 will rotate forty degrees. At the same time, the supporting component 6 will descend by the thickness of one rotor iron chip 4, so that the top of the rotor iron chip 4 on the supporting component 6 is flush with the top surface of the lower mold 3. During the stacking of the rotor iron chips 4 on the top of the supporting component 6, the rivets 41 and the rivet grooves 42 will be inserted, thereby realizing the stacking of the rotor iron chips 4. When eight rotor iron chips 4 are stacked, the supporting component 6 will descend to below the delivery slot 36. At this time, the stacked rotor iron chips 4 will detach from the supporting component 6 and be located in the delivery slot 36. Then the pushing component 8 will be activated to push the rotor iron chips 4 out of the delivery slot 36, thereby completing the production and stacking of this part of the rotor iron core.

[0032] Reference Figure 4 and Figure 5The rotating assembly 5 includes a fixed frame 51, a fixed platform 52, a worm gear 53, a worm 54, a drive motor 55, a support ring 56, and an electric actuator 57. The fixed frame 51 is fixedly connected to the bottom of the delivery slot 36, the fixed platform 52 is fixedly connected to the bottom of the fixed frame 51, the worm gear 53 is rotatably connected to the fixed platform 52, the worm 54 is rotatably connected to the fixed platform 52 and meshes with the worm gear 53, the drive motor 55 is fixedly connected to the edge of the fixed platform 52, and the output shaft of the drive motor 55 is connected to the worm gear 54. The rod 54 is fixedly connected, and the support ring 56 is fixedly connected at the center of the worm gear 53. The electric actuator 57 is slidably connected to the support ring 56. When the drive motor 55 is started, the output shaft of the drive motor 55 will drive the worm 54 to rotate, the worm 54 will drive the worm gear 53 to rotate, and at the same time drive the electric actuator 57 to rotate. The circumferential surface of the electric actuator 57 is provided with multiple sets of vertically oriented grooves. The support ring 56 is fixedly connected with a protrusion that engages with the vertically oriented grooves, so that the electric actuator 57 can follow the rotation of the support ring 56.

[0033] Reference Figure 5 The electric push rod 57 is also provided with a drive groove 571 and a vertical groove 572, and a guide post 511 is fixedly connected to the fixing frame 51. The drive groove 571 is spirally formed on the outer peripheral wall of the electric push rod 57. The drive groove 571 is one circle around the outside of the electric push rod 57. The distance from the top end of the drive groove 571 to the bottom end is equal to the height of the finished rotor core after stacking. The vertical groove 572 is connected to the top end of the drive groove 571. The guide post 511 is fixedly connected to the fixing frame 51. The end of the guide post 511 is slidably connected to the drive groove 571 and the vertical groove 572. When the drive motor 55 drives the worm gear 53 to rotate clockwise by 45 degrees, the electric push rod 57 will rotate by the same angle. Under the action of the guide post 511 and the drive groove 571, the electric push rod 57 will drop by the thickness of one iron chip.

[0034] Reference Figure 1 , Figure 7 and Figure 8 The discharge slot 36 is also provided with a passage 361, through which the supporting component 6 can pass. The diameter of the passage 361 is smaller than the diameter of the rotor iron chip 4. When the supporting component 6 is located below the passage 361, the rotor iron chip 4 will be blocked and detached from the supporting component 6 because the diameter of the rotor iron chip 4 is larger than the passage 361.

[0035] Reference Figures 5 to 9The supporting component 6 includes a chassis 61, a fixing post 62, a tray 63, a spring 64, and a groove 65; the chassis 61 is fixedly connected to the top of the electric push rod 57, the fixing post 62 is fixedly connected to the chassis 61 and is provided with multiple sets arranged in a ring array on the upper surface of the chassis 61, the tray 63 is slidably connected to the fixing post 62, and the spring 64 is sleeved on the outside of the fixing post 62;In the initial state, the guide post 511 is located at the bottom end of the drive groove 571. At this time, the top of the tray 63 is flush with the top surface of the lower die 3. When the first set of rotor iron chips 4 is pressed down at the punching opening 35, the pushing force of the punching die 34 and the reaction force of the spring 64 will cause the bottom rivet 41 of the rotor iron chip 4 to be inserted into the groove 65 on the tray 63. At this time, the rotor iron chip 4 will be temporarily fixed on the tray 63. After the punching die 34 rises, the tray 63 will be reset by the pushing force of the spring 64. At this time, the motor will drive the worm gear 53 to rotate forty-five degrees. At the same time, with the cooperation of the guide post 511 and the drive groove 571, the push rod will descend by the thickness of one rotor iron chip 4, and then descend to make the tray The top surface of the upper rotor iron chip 4 is flush with the top surface of the lower die 3. Then, the upper and lower parts of the silicon steel plate that need to be punched will move to the lower part of the punching die 34. The above movement is repeated to complete the stacking of the rotor iron chips 4. During the stacking process, the rivets 41 of each group of rotor iron chips 4 will be inserted into the rivet slots 42 of the lower rotor iron chip 4 to complete the fixation. When the eight groups of rotor iron chips 4 are stacked, the guide post 511 will also be located at the top of the drive slot 571, but not yet in the vertical slot 572. At this time, the drive motor 55 can be driven to continue to rotate clockwise to make the guide post 511 enter the vertical slot 572. Then, the electric push rod 57 can be started to descend and drive the tray 63 to descend below the passage 361. Due to the rotor iron core The diameter of the chip 4 is larger than the through-hole 361, thus the rotor iron chip 4 will be blocked and detached from the support assembly 6 and located in the delivery slot 36. In this way, the punching die 34 achieves soft contact during the punching process, preventing the rigid contact caused by the traditional direct drive of the tray 63 to the punching die 34 via the electric push rod 57 or hydraulic cylinder, which would damage the electric push rod 57 or hydraulic cylinder when the punching die 34 descends. Furthermore, by lowering the tray 63 by the thickness of one rotor iron chip 4 with each rotation of the worm gear 53, it is ensured that each set of rotor iron chips 4 will be flush with the top surface of the lower die 3 after stacking. This allows the next set of rotor iron cores to be directly stacked with the stacked rotor iron chips 4 with zero gap during punching, improving efficiency. To ensure stacking precision and accuracy, and by rotating the rotor iron chip 4 by 45 degrees each time it is stacked, the misalignment of the next set of rotor iron chips 4 with the rotor iron chips 4 below can be achieved. This also ensures the insertion of the rivets 41 and the rivet slots 42. This prevents the small burrs and scratches on the finished rotor iron chip 4 from converging on a vertical line when the edge of the punching die 34 is damaged during long-term operation. Even if there is minor damage to the die that is not visible to the naked eye, the small burrs and scratches on the rotor iron chip 4 can be evenly distributed along the outer circumference of the finished rotor core, thus preventing unstable centrifugal force from being generated during rotation after the rotor core is assembled with other components into a complete motor.

[0036] Reference Figure 5 , Figure 8 and Figure 9The number of grooves 65 is the same as the number of rivets 41, both having eight sets. The rotor iron chip 4 is inserted into the groove 65 through the rivets 41. When the worm gear 54 rotates forty-five degrees, the tray 63 will drop by the height of one rotor iron chip 4. Since the drive groove 571 covers the outer circumference of the electric push rod 57 in one circle, and the height of the top and bottom of the drive groove 571 is equal to the height of the eight sets of rotor iron chips 4 stacked together, when the worm gear 53 rotates 360 degrees clockwise, the guide post 511 will be located at the top of the drive groove 571, and the vertical groove 572 will be located on the right side of the top of the drive groove 571, not coinciding with the top position.

[0037] Reference Figure 6 and Figure 7 The air blowing assembly 7 includes an air jet 71, a folding airbag 72, and a connecting pipe 73. The air jet 71 is fixedly connected inside the blanking die 34, and the bottom of the air jet 71 is flush with the bottom of the blanking die 34. There are two sets of folding airbags 72, which are respectively fitted on the two sets of columns 2 on the right side. The top of the folding airbag 72 is fixedly connected to the upper die 1, and the bottom is fixedly connected to the lower die 3. The connecting pipe 73 is connected to the air jet 71 and the folding airbag 72. During the reciprocating motion of the upper die 1, the upper die 1 will drive the folding airbag 72 to continuously complete the closing action, so that the folding airbag 72 is filled with air when the upper die 1 rises, and sprays out gas when the upper die 1 and the lower die 3 approach each other. The sprayed gas can clean the surface of the rotor iron chip 4, preventing small burrs or other impurities from falling on the surface of the rotor iron chip 4, so that impurities are trapped between the rotor iron chips 4 during stacking, which affects the product quality.

[0038] Reference Figure 8 The pushing component 8 includes a slide 81, a push block 82, and a telescopic cylinder 83. The slide 81 is opened in the delivery slot 36, the push block 82 is slidably connected to the slide 81, and the telescopic cylinder 83 is fixedly installed on the side wall of the lower mold 3, and the output end of the telescopic cylinder 83 is fixedly connected to the push block 82. After the eight sets of rotor iron chips 4 are stacked, the electric push rod 57 will drive the tray 63 to descend below the passage 361. Since the diameter of the rotor iron chip 4 is larger than the passage 361, the rotor iron chip 4 will be blocked and detached from the supporting component 6 and located in the delivery slot 36. Then the telescopic cylinder 83 can be activated to drive the push block 82 to push the stacked rotor iron chip 4 finished product out of the delivery slot 36.

[0039] Reference Figure 7 and Figure 8The inner bottom surface of the discharge slot 36 is also provided with a recessed notch 362. The width of the recessed notch 362 is greater than the distance between two rivets 41 that are symmetrical about the center line of the rotor iron chip 4. When the stacked rotor iron chip 4 is pushed out of the discharge slot 36, the riveting groove 42 of the bottom rotor iron chip 4 will pass through the recessed notch 362, thereby preventing it from being blocked during movement.

[0040] Working principle: During the operation, the hydraulic system above the upper mold 1 will drive the upper mold 1 to move up and down along the column 2 to stamp the silicon steel sheet on the lower mold 3 to form the rotor iron chip 4. When the silicon steel sheet passes through the first mold 31, it will be punched into eight sets of annular array heat dissipation holes. When the silicon steel sheet passes through the second mold 32, eight sets of annular array V-shaped magnetic steel grooves will be added to the outside of the heat dissipation holes. When it passes through the third mold 33, it will be punched into eight sets of recessed riveting grooves 42 on the previous basis. The protruding part of the riveting groove 42 is the rivet 41. Then, when it passes through the blanking mold 34, all the patterns punched in the previous blanking will be punched out of the silicon steel sheet to form the rotor iron chip 4. The blanked rotor iron chip 4 will be received by the tray 63.

[0041] In the initial state, the guide post 511 is located at the bottom end of the drive groove 571. At this time, the top of the tray 63 is flush with the top surface of the lower die 3. When the first set of rotor iron chips 4 is pressed down on the punching opening 35, the pushing force of the punching die 34 and the reaction force of the spring 64 will cause the bottom rivet 41 of the rotor iron chip 4 to be inserted into the groove 65 on the tray 63. At this time, the rotor iron chip 4 will be temporarily fixed on the tray 63. After the punching die 34 rises, the tray 63 will be reset by the pushing force of the spring 64. At this time, the motor will drive the worm gear 53 to rotate forty-five degrees. At the same time, with the cooperation of the guide post 511 and the drive groove 571, the push rod will descend by the thickness of one rotor iron chip 4. After descending, the top surface of the rotor iron chip 4 on the tray 63 will be flush with the top surface of the lower die 3. Then, the upper and lower parts of the silicon steel plate that need to be punched will move to the bottom of the punching die 34. The above movement is repeated to complete the stacking of the rotor iron chips 4.

[0042] During the stacking process, the rivets 41 of each set of rotor iron chips 4 will be inserted into the riveting slots 42 of the lower rotor iron chip 4 to complete the fixation. After the eight sets of rotor iron chips 4 are stacked, the guide post 511 will also be located at the top of the drive slot 571, but not yet in the vertical slot 572. At this time, the drive motor 55 can be driven to rotate clockwise to make the guide post 511 enter the vertical slot 572. Then, the electric push rod 57 can be activated to descend and drive the tray 63 to descend below the passage 361. Since the diameter of the rotor iron chip 4 is larger than the passage 361, the rotor iron chip 4 will be blocked and detach from the support assembly 6 to be located in the delivery slot 36. In this way, the punching die 34 achieves soft contact during the punching process, preventing the rigid contact of the tray 63 with the punching die 34 driven directly by the electric push rod 57 or hydraulic cylinder, which would damage the electric push rod 57 or hydraulic cylinder when the punching die 34 descends. Furthermore, the tray 63 descends with each rotation of the worm gear 53. The thickness of the rotor iron chip 4 ensures that each set of rotor iron chips 4 is flush with the top surface of the lower die 3 after stacking. This allows the next set of rotor iron cores to be directly stacked with the stacked rotor iron chips 4 with zero gap during stamping, improving the stacking precision and accuracy. Furthermore, the method of rotating the rotor iron chip 4 by 45 degrees each time one rotor iron chip 4 is stacked completes the misalignment between the next set of rotor iron chips 4 and the rotor iron chip 4 below, while simultaneously ensuring the insertion of the rivet 41 and the rivet groove 42. This prevents the small burrs and scratches on the rotor iron chip 4 of the finished product from converging on a vertical line when the edge of the stamping die 34 is damaged during long-term operation. Even if there is minor damage to the die that is not visible to the naked eye, the small burrs and scratches on the rotor iron chip 4 can be evenly distributed around the outer circumference of the finished rotor iron core, thereby preventing the rotor iron core from generating unstable centrifugal force when it is assembled with other components into a complete motor.

[0043] After the eight sets of rotor iron chips 4 are stacked, the electric push rod 57 will drive the tray 63 to descend below the passage 361. Since the diameter of the rotor iron chip 4 is larger than the passage 361, the rotor iron chip 4 will be blocked and detach from the support assembly 6 and be located in the delivery slot 36. Then, the telescopic cylinder 83 can be activated to drive the push block 82 to push the stacked rotor iron chip 4 finished product out of the delivery slot 36. When the stacked rotor iron chip 4 is pushed out of the delivery slot 36, the riveting groove 42 of the bottom rotor iron chip 4 will pass through the recessed notch 362, so it will not be blocked during the movement. When punching and stacking the next set of rotor iron chips 4, the electric push rod 57 can be activated to rise and move the bottom of the vertical groove 572 to abut against the guide post 511. Then, the worm gear 54 is rotated counterclockwise 360 ​​degrees to reset the tray 63 to the initial state and keep it flush with the top surface of the lower die 3. Then, the above actions are repeated to punch and stack the next set of rotor iron chips 4.

[0044] Furthermore, during the reciprocating motion of the upper mold 1, the upper mold 1 will drive the folding airbag 72 to continuously complete the retraction action, thereby causing the folding airbag 72 to fill with air when the upper mold 1 rises, and to spray out gas when the upper mold 1 and the lower mold 3 approach each other. The sprayed gas can clean the surface of the rotor iron chip 4, preventing small burrs or other impurities from falling on the surface of the rotor iron chip 4, thus preventing impurities from being trapped between the rotor iron chips 4 during stacking, which would affect product quality.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A rotor core stacking device for a new energy vehicle motor, characterized in that: The stacking device comprises a lower die (3), a column (2), an upper die (1), a die one (31), a die two (32), a die three (33), a punching die (34), a punching opening (35), a delivery slot (36), a rotor core piece (4), a rivet (41), a riveting groove (42), a rotating assembly (5), a supporting assembly (6), a blowing assembly (7), and a pushing assembly (8); the column (2) is provided with four groups of four corners fixedly connected to the lower die (3); the upper die (1) is in sliding connection with the column (2); the die one (31), the die two (32), the die three (33) and the punching die (34) are all fixedly connected to the bottom surface of the upper die (1), the punching opening (35) and the delivery slot (36) are both provided at the right end close to the lower die (3); the die three (33) punches the rivet (41) and the riveting groove (42) on the rotor core piece (4); the rotating assembly (5) is arranged below the delivery slot (36); the rotor core piece (4) is stacked on the supporting assembly (6); the supporting assembly (6) is arranged at the position of the punching opening (35) and is fixedly connected with the rotating assembly (5); the blowing assembly (7) is arranged at the punching die (34); the pushing assembly (8) is arranged in the delivery slot (36) and is in sliding connection with the lower die (3); The rotating assembly (5) comprises a fixed frame (51), a fixed table (52), a worm wheel (53), a worm (54), a driving motor (55), a supporting ring (56), and an electric push rod (57); the fixed frame (51) is fixedly connected below the delivery slot (36), the fixed table (52) is fixedly connected to the bottom end of the fixed frame (51), the worm wheel (53) is in rotary connection with the fixed table (52), the worm (54) is in rotary connection with the fixed table (52) and is in meshing connection with the worm wheel (53), the driving motor (55) is fixedly connected to the edge of the fixed table (52), and the output shaft of the driving motor (55) is fixedly connected with the worm (54), the supporting ring (56) is fixedly connected to the center of the worm wheel (53), and the electric push rod (57) is in sliding connection with the supporting ring (56); The electric push rod (57) is further provided with a driving groove (571) and a vertical groove (572), and the fixed frame (51) is further fixedly connected with a guide column (511); the driving groove (571) is spirally provided on the outer peripheral wall of the electric push rod (57), the driving groove (571) surrounds the electric push rod (57) by one turn on the outside, the distance between the top end and the bottom end of the driving groove (571) is equal to the height of the rotor core product after stacking, the vertical groove (572) is in communication with the top end of the driving groove (571), the guide column (511) is fixedly connected with the fixed frame (51), and the tail end of the guide column (511) is in sliding connection with the driving groove (571) and the vertical groove (572). The supporting assembly (6) comprises a chassis (61), a fixed column (62), a tray (63), a spring (64), and a groove (65); the chassis (61) is fixedly connected with the top end of the electric push rod (57), the fixed column (62) is fixedly connected on the chassis (61) and is provided with a plurality of groups of annular arrays distributed on the upper surface of the chassis (61), the tray (63) is slidingly connected with the fixed column (62), and the spring (64) is sleeved outside the fixed column (62).

2. The rotor core stacking device for a new energy vehicle motor according to claim 1, characterized in that: The through port (361) is provided in the delivery slot (36), the supporting assembly (6) can pass through the through port (361), and the diameter of the through port (361) is smaller than the diameter of the rotor core piece (4).

3. The rotor core stacking device for a new energy vehicle motor according to claim 2, characterized in that: The number of the grooves (65) is consistent with the number of the rivets (41), and eight groups of the grooves (65) are provided, and the rotor core piece (4) is inserted with the rivets (41) and the grooves (65).

4. The rotor core stacking device for a new energy vehicle motor according to claim 3, characterized in that: The blowing assembly (7) comprises a jet port (71), a folding air bag (72), and a connecting pipe (73); the jet port (71) is fixedly connected in the blanking die (34), the bottom of the jet port (71) is flush with the bottom of the blanking die (34), the folding air bag (72) is provided in two groups and is sleeved on the right two groups of the stand column (2), the top of the folding air bag (72) is fixedly connected with the upper die (1), the bottom is fixedly connected with the lower die (3), and the connecting pipe (73) is connected with the jet port (71) and the folding air bag (72).

5. The rotor core stacking device for a new energy vehicle motor according to claim 4, characterized in that: The pushing assembly (8) comprises a sliding groove (81), a push block (82), and a telescopic air cylinder (83); the sliding groove (81) is provided in the delivery slot (36), the push block (82) is slidingly connected with the sliding groove (81), and the telescopic air cylinder (83) is fixedly installed on the side wall of the lower die (3) and is fixedly connected with the push block (82) at the output end.

6. The rotor core stacking device for a new energy vehicle motor according to claim 5, characterized in that: The recessed notch (362) is provided on the inner bottom surface of the delivery slot (36), and the width of the recessed notch (362) is greater than the distance between the two rivets (41) symmetrically relative to the center line of the rotor core piece (4).

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