Low-stress neodymium iron boron permanent magnet assembling device and preparation method

Abstract

The invention discloses a low-stress neodymium-iron-boron permanent magnet assembling device and a preparation method, and belongs to the technical field of neodymium-iron-boron permanent magnet assembly.The low-stress neodymium-iron-boron permanent magnet assembling device comprises a base, mounting plates are arranged at the two ends of the top of the base in a sliding mode, and a distance adjusting mechanism for controlling the two mounting plates in a sliding mode is arranged on the base. The rotor is transversely placed at the top of the supporting mechanism, the magnet inserting mechanisms are arranged at the two ends of the top of the base correspondingly and located on the two sides of the base correspondingly, and then the angle adjusting mechanism between the tops of the side supports is utilized, so that when the device inserts a magnet into a V-shaped radial notch, the magnet inserting efficiency is improved; according to the invention, the inclination angle of the magnet insertion mechanism can be adjusted according to the angle of the V-shaped groove, so that during assembly, the two sides of the V-shaped groove can be simultaneously inserted from the two ends of the rotor, then the rotor is controlled by the rotating mechanism to rotate around the shaft, the magnet on the rotor is rapidly assembled, the assembly speed is improved, and the practicability is higher.

Description

Technical Field

[0001] The present invention relates to an NdFeB permanent magnet assembly device, in particular to a low-stress NdFeB permanent magnet assembly device and a preparation method. The present invention also relates to a preparation method, in particular to a low-stress NdFeB permanent magnet preparation method, and belongs to the technical field of NdFeB permanent magnet assembly. Background Art

[0002] According to the different installation positions of the permanent magnets in the rotor core, permanent magnet synchronous motors can be divided into two types: surface-mounted and built-in structures. The permanent magnets in the built-in structure are directly installed in the permanent magnet slots without the need for additional fixing measures. The arrangement of the permanent magnets in the slots is divided into radial, tangential, U-shaped hybrid and V-shaped radial. At present, in the process of assembling radial NdFeB permanent magnets, the magnets are evenly distributed in a circular array on the outside of the rotor, and then synchronously transported and pressed into the inside of the core. However, due to the opening method of the V-shaped radial slots, the magnets cannot be evenly distributed along the circumference of the rotor for rapid assembly. It is necessary to first plug in the same-pole magnets on one side at one station, and then move to another station to install the opposite pole on the other side. The assembly process is relatively cumbersome, which reduces the efficiency of assembly.

[0003] Therefore, a low-stress NdFeB permanent magnet assembly device and preparation method are designed to optimize the above problems. Summary of the Invention

[0004] The main purpose of the present invention is to provide a low-stress NdFeB permanent magnet assembly device and preparation method, by placing the rotor horizontally on the top of the support mechanism, and arranging a magnet insertion mechanism consisting of a support plate, a storage straight cylinder, a push-out port, a third cylinder, and a push plate at both ends of the top of the base, and the magnet insertion mechanism is respectively located on both sides of the base, and then using the angle adjustment mechanism between the tops of the side brackets, when the device inserts the magnet into the V-shaped radial slot, the inclination angle of the magnet insertion mechanism can be adjusted according to the angle of the V-shaped slot, and then during assembly, the two sides of the V-shaped slot can be plugged in simultaneously from both ends of the rotor, and then the rotating mechanism is used to control the rotor to rotate around the axis, and the magnets on the rotor are quickly assembled, thereby improving the assembly speed and being practical. The device has higher flexibility, and a spacing adjustment mechanism consisting of a strip groove, a slider, a screw and a first motor is provided on the top of the base to correct the horizontal spacing of the magnet insertion mechanism, and then the side bracket consisting of a lower vertical plate, an upper vertical plate, a groove, a second cylinder and a limit rod is used to adjust the vertical height of the magnet insertion mechanism, so that the device can assemble magnets on rotors of different specifications, and has higher applicability. Through the support mechanism consisting of a support plate, a transverse guide groove, a V-shaped guide groove and a notch groove, when the rotor is lowered horizontally from the notch groove, the rotor can automatically roll to the inside of the V-shaped guide groove for support. When the rotor is taken out, it is only necessary to use the pushing mechanism consisting of the first cylinder, the connecting rod and the triangular block to push the rotor to the inside of the notch groove, which makes it more convenient to take and put the rotor.

[0005] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] A low-stress NdFeB permanent magnet assembly device comprises a base;

[0007] Mounting plates are slidably mounted on both ends of the top of the base, and a spacing adjustment mechanism for slidingly controlling the two sets of mounting plates is provided on the base;

[0008] A support mechanism for supporting the rotor shaft is vertically provided at one end of the top of the mounting plate near the middle of the base;

[0009] The sides of the support mechanism are all equipped with a rotating mechanism that drives the rotor to rotate at a constant speed;

[0010] A mechanism for pushing the rotor toward the front end is provided at the middle position of the top of the base;

[0011] Both ends of the top of the base are equipped with magnet insertion mechanisms, and two sets of magnet insertion mechanisms are located on both sides of the base;

[0012] A side bracket for controlling the lifting and lowering of the magnet insertion mechanism is provided at one end of the top of the mounting plate away from the ejection mechanism;

[0013] An angle adjustment mechanism is provided between the tops of the two sets of side brackets to control the rotation angles of the two sets of magnet insertion mechanisms.

[0014] Preferably: the spacing adjustment mechanism includes a strip groove, a slider, a screw and a first motor, the strip grooves are opened at both ends of the top of the base, and the strip grooves are parallel to the length direction of the base, sliders are slidably provided inside the strip grooves, the tops of the two groups of sliders are respectively fixedly connected to the mounting plates, a screw is rotatably installed inside the base along the length direction, the two ends of the screw are respectively rotatably connected to the slider, the first motor is installed at one end of the base, and the output end of the first motor is fixedly connected to the slider.

[0015] Preferably: the supporting mechanism includes a supporting plate, a transverse guide groove, a V-shaped guide groove and a notch groove, the supporting plate is vertically fixed on the top of the mounting plate, and a protrusion is provided on the front side of the top of the supporting plate, a transverse guide groove is provided on the top of the supporting plate along the width direction, a V-shaped guide groove is provided on the inner bottom of the transverse guide groove, and a notch groove is provided on the top of the front side of the transverse guide groove.

[0016] Preferably: the pushing mechanism includes a first cylinder, a connecting rod and a triangular block, the first cylinder is arranged in the middle position of the base parallel to the width direction of the base, the output end of the first cylinder is installed with a connecting rod, and triangular blocks are fixed at both ends of the connecting rod, and the inclined surface of the triangular block faces the front side of the base.

[0017] Preferably: the rotating mechanism includes a mounting box, a second motor, a worm, a worm wheel, a shaft and a roller, the mounting box is fixed to the side of the support plate, the front end of the mounting box is installed with the second motor, the output end of the second motor is installed with a worm, the worm is parallel to the length direction of the mounting box, both ends inside the mounting box are rotatably installed with worm wheels that engage with the worm, the sides of the worm wheel are installed with shafts, the shafts are rotatably connected to the mounting box through bearings and extend to the inside of the support plate, rollers are fixed on the shafts, the tops of the rollers protrude from the inner side of the V-shaped guide groove, and the rollers are rotatably connected to the support plate.

[0018] Preferably: the side bracket includes a lower vertical plate, an upper vertical plate and a second cylinder, the lower vertical plate is vertically fixed on the top of the mounting plate, the upper vertical plate is vertically slidably provided on the inner side of the lower vertical plate, the second cylinder is vertically installed on the top end of the lower vertical plate, and the output end of the second cylinder is connected to the upper vertical plate.

[0019] Preferably, grooves are provided on the mating sides of the lower vertical plate and the upper vertical plate, a limiting rod is fixed at the bottom of the groove on the lower vertical plate, and the limiting rod is vertically slidably connected to the upper vertical plate.

[0020] Preferably: the magnet insertion mechanism includes a support plate, a storage cylinder, an ejection port, a third cylinder, a push plate and a metal block. The end face of the support plate is rotatably installed on the inner side of the upper vertical plate through a rotating shaft. The top of the support plate is installed with a third cylinder along the length direction. The output end of the third cylinder is horizontally installed with a push plate. The top of the support plate away from the upper vertical plate is vertically fixed with a storage cylinder. The bottom end of the storage cylinder is provided with an ejection port that cooperates with the push plate. The bottom end of the storage cylinder is fixed with a metal block, and the magnet is magnetically attracted to the top of the metal block.

[0021] The cam is fixedly provided with a first end in the middle position of the top of the second horizontal plate, and a second end in the middle position of the second horizontal plate.

[0022] The present invention also provides a method for preparing a low-stress NdFeB permanent magnet, comprising the following steps:

[0023] Step 1: Pass the rotor shaft through the center of the rotor and secure it. Use the spacing adjustment mechanism to adjust the spacing between the two sets of support mechanisms according to the thickness of the rotor, ensuring that the spacing between the support mechanisms is the same as the thickness of the rotor. Then, place the rotor shaft horizontally on top of the two sets of support mechanisms, with the rotor located between the two sets of support mechanisms.

[0024] Step 2: Adjust the vertical height of the side bracket and the angle of the magnet insertion mechanism using the angle adjustment mechanism. Align the insertion openings on the magnet insertion mechanism with different sides of the V-grooves at both ends of the rotor. Use the two sets of magnet insertion mechanisms to insert magnets of different magnetic poles, respectively, to ensure that the magnetic poles on both sides of the V-grooves are opposite.

[0025] Step 3: Use the magnet insertion mechanism to insert the magnet in a straight line. After a single magnet is inserted, use the rotation mechanism to control the rotation of the rotor to change the insertion position. After the magnet is inserted, start the ejection mechanism to push the rotor out from the inside of the support mechanism, remove the rotor, repeat the above steps, and assemble the magnet again.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a low-stress NdFeB permanent magnet assembly device and preparation method. The device is constructed by placing a rotor horizontally on top of a support mechanism, and providing a magnet insertion mechanism consisting of a support plate, a storage cylinder, a push-out port, a third cylinder, and a push plate at both ends of the top of the base. The magnet insertion mechanism is located on both sides of the base, and an angle adjustment mechanism is used between the tops of the side brackets. When the device inserts the magnet into the V-shaped radial slot, the inclination angle of the magnet insertion mechanism can be adjusted according to the angle of the V-shaped slot. During assembly, both sides of the V-shaped slot can be plugged in simultaneously from both ends of the rotor. The rotor is then controlled to rotate around the axis by a rotating mechanism, and the magnets on the rotor are quickly assembled, thereby improving the assembly speed and enhancing practicality.

[0028] By setting a spacing adjustment mechanism consisting of a strip groove, a slider, a screw, and a first motor on the top of the base, the horizontal spacing of the magnet insertion mechanism is corrected. In combination with a side bracket consisting of a lower vertical plate, an upper vertical plate, a groove, a second cylinder, and a limit rod, the vertical height of the magnet insertion mechanism is adjusted, so that the device can assemble magnets on rotors of different specifications, and has greater applicability;

[0029] Through the support mechanism composed of the support plate, the transverse guide groove, the V-shaped guide groove, and the notch groove, when the rotor is lowered horizontally from the notch groove, the rotor can automatically roll into the inside of the V-shaped guide groove for support. When the rotor is taken out, it is only necessary to use the pushing mechanism composed of the first cylinder, the connecting rod, and the triangular block to push the rotor into the inside of the notch groove, making the rotor more convenient to take and place. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a front view of a preferred embodiment of a low-stress NdFeB permanent magnet assembly device and preparation method of the present invention;

[0031] Figure 2 It is a partial cross-sectional view of a preferred embodiment of a low-stress NdFeB permanent magnet assembly device and preparation method of the present invention;

[0032] Figure 3 This is a front view of a support mechanism of a preferred embodiment of a low-stress NdFeB permanent magnet assembly device and preparation method of the present invention;

[0033] Figure 4 A side view of a support mechanism of a preferred embodiment of a low-stress NdFeB permanent magnet assembly device and preparation method of the present invention;

[0034] Figure 5 A diagram of a rotating mechanism of a preferred embodiment of a low-stress NdFeB permanent magnet assembly device and preparation method of the present invention;

[0035] Figure 6 This is a diagram of an ejection mechanism of a preferred embodiment of a low-stress NdFeB permanent magnet assembly device and preparation method of the present invention;

[0036] Figure 7 This is a structural diagram of a side bracket of a preferred embodiment of a low-stress NdFeB permanent magnet assembly device and preparation method of the present invention;

[0037] Figure 8 This is a diagram of the angle adjustment mechanism of a preferred embodiment of a low-stress NdFeB permanent magnet assembly device and preparation method of the present invention.

[0038] In the figure: 1. Base; 2. Mounting plate;

[0039] 3. Spacing adjustment mechanism; 301. Strip groove; 302. Slider; 303. Screw; 304. First motor;

[0040] 4. Support mechanism; 401. Support plate; 402. Horizontal guide groove; 403. V-shaped guide groove; 404. Notch groove;

[0041] 5. Rotating mechanism; 501. Mounting box; 502. Second motor; 503. Worm; 504. Worm gear; 505. Shaft; 506. Roller;

[0042] 6. Push-out mechanism; 601. First cylinder; 602. Connecting rod; 603. Triangular block;

[0043] 7. Side bracket; 701. Lower vertical plate; 702. Upper vertical plate; 703. Groove; 704. Second cylinder; 705. Limit rod;

[0044] 8. Support plate; 9. Storage cylinder; 10. Push-out port; 11. Third cylinder; 12. Push plate;

[0045] 13. Angle adjustment mechanism; 1301. First horizontal plate; 1302. Second horizontal plate; 1303. Limiting plate; 1304. First through slot; 1305. Second through slot; 1306. First slide rod; 1307. Push rod; 1308. Fourth cylinder; 1309. Second slide rod; 1310. Spring;

[0046] 14. Metal block. DETAILED DESCRIPTION

[0047] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is described in further detail below with reference to embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0048] like Figures 1-8As shown, this embodiment provides a low-stress NdFeB permanent magnet assembly device, including a base 1;

[0049] Mounting plates 2 are slidably mounted on both ends of the top of the base 1, and a spacing adjustment mechanism 3 for slidingly controlling the two sets of mounting plates 2 is provided on the base 1;

[0050] A support mechanism 4 for supporting the rotor shaft is vertically provided at one end of the top of the mounting plate 2 near the middle of the base 1;

[0051] The sides of the support mechanism 4 are each provided with a rotating mechanism 5 that drives the rotor to rotate at a constant speed;

[0052] A pushing mechanism 6 for pushing the rotor toward the front end is provided at the middle position of the top of the base 1;

[0053] Both ends of the top of the base 1 are provided with magnet insertion mechanisms, and two sets of magnet insertion mechanisms are located on both sides of the base 1 respectively;

[0054] The top end of the mounting plate 2 away from the ejection mechanism 6 is provided with a side bracket 7 for controlling the lifting and lowering of the magnet insertion mechanism;

[0055] An angle adjustment mechanism 13 is provided between the tops of the two sets of side brackets 7 to control the rotation angles of the two sets of magnet insertion mechanisms.

[0056] The overall working principle: the rotor shaft passes through the center of the rotor and is fixed. The spacing of the two sets of support mechanisms 4 is adjusted by the spacing adjustment mechanism 3 according to the thickness of the rotor to ensure that the spacing of the support mechanisms 4 is the same as the thickness of the rotor. The rotor shaft is then placed horizontally on the top of the two sets of support mechanisms 4, and the rotor is located between the two sets of support mechanisms 4. The vertical height of the side bracket 7 is adjusted, and the angle of the magnet insertion mechanism is adjusted by the angle adjustment mechanism 13. The insertion ports on the magnet insertion mechanism correspond to different sides of the V-grooves at both ends of the rotor. The two sets of magnet insertion mechanisms insert magnets of different poles respectively to ensure that the poles on both sides of the V-grooves are opposite. The magnet insertion mechanism is used to insert the magnet in a straight line, and after a single magnet is inserted, the rotation of the rotor is controlled by the rotation mechanism 5 to change the insertion position. After the magnet is inserted, the ejection mechanism 6 is started to push the rotor out from the inside of the support mechanism 4, remove the rotor, repeat the above steps, and assemble the magnet again.

[0057] In this embodiment, the spacing adjustment mechanism 3 includes a strip groove 301, a slider 302, a screw 303 and a first motor 304. The strip groove 301 is opened at both ends of the top of the base 1, and the strip groove 301 is parallel to the length direction of the base 1. Sliders 302 are slidably provided inside the strip groove 301. The tops of the two groups of sliders 302 are respectively fixedly connected to the mounting plate 2. The inside of the base 1 is rotatably installed with a screw 303 along the length direction. The two ends of the screw 303 are respectively rotatably connected to the slider 302. A first motor 304 is installed at one end of the base 1, and the output end of the first motor 304 is fixedly connected to the slider 302.

[0058] Local working principle: After the first motor 304 is started, the output end drives the screw 303 to rotate along the length direction of the base 1. Since the two ends of the screw 303 are respectively connected to the sliders 302 on both sides through threads, and the sliders 302 are limited by the strip grooves 301 and can only slide along the length direction of the base 1, the rotation of the screw 303 is converted into linear motion of the sliders 302. The tops of the two groups of sliders 302 are fixed with mounting plates 2 respectively. When the screw 303 rotates forward, the sliders 302 on both sides move synchronously toward the center of the base 1, reducing the distance between the mounting plates 2. When reversed, they move toward both ends to expand the distance. By controlling the number of rotations of the first motor 304, the spacing of the support mechanism 4 can be accurately adjusted to match the thickness of the rotor.

[0059] In this embodiment, the support mechanism 4 includes a support plate 401, a transverse guide groove 402, a V-shaped guide groove 403 and a notch groove 404. The support plate 401 is vertically fixed on the top of the mounting plate 2, and a protrusion is provided on the front side of the top of the support plate 401. The top of the support plate 401 is provided with a transverse guide groove 402 along the width direction, and the inner bottom of the transverse guide groove 402 is provided with a V-shaped guide groove 403. The angle of the V-shaped guide groove 403 is 90°, and the groove bottom radius is 2mm. It is suitable for a rotor shaft with a diameter of 10-30mm and can be stamped by a mold in one time. A notch groove 404 is provided on the top of the front side of the transverse guide groove 402. The width of the notch groove 404 is 1.5 times the diameter of the rotor shaft and the depth is 10mm. A 15° chamfer is set at the front end to facilitate the rotor to slide out.

[0060] Local working principle: When the rotor shaft is placed in the transverse guide groove 402, the rotor will automatically roll into the V-shaped guide groove 403 because the bottom of the V-shaped guide groove 403 is a V-shaped structure. The protrusions on the top of the support plates 401 on both sides limit the axial displacement of the rotor to achieve stable support. The notch groove 404 is located in front of the transverse guide groove 402. When the rotor needs to be taken out, the ejection mechanism 6 pushes the rotor to the notch groove 404 for easy manual removal.

[0061] In this embodiment, the ejection mechanism 6 includes a first cylinder 601, a connecting rod 602 and a triangular block 603. The first cylinder 601 is arranged in the middle position of the base 1 parallel to the width direction of the base 1. The output end of the first cylinder 601 is installed with a connecting rod 602. Triangular blocks 603 are fixed at both ends of the connecting rod 602. The inclined surface of the triangular block 603 faces the front side of the base 1. The inclined surface angle of the triangular block 603 is 30°. The material is 45# steel and the surface is quenched to avoid wear during ejection.

[0062] Local working principle: When the piston rod of the first cylinder 601 is extended, it drives the connecting rod 602 to move forward, and the inclined surfaces of the triangular blocks 603 at both ends push the bottom of the rotor. Since the inclined surfaces of the triangular blocks 603 are facing the front side of the base 1, the thrust is decomposed into an upward component along the inclined surfaces, causing the rotor to lift from the V-shaped guide groove 403 and slide into the notch groove 404, achieving damage-free ejection.

[0063] In this embodiment, the rotating mechanism 5 includes a mounting box 501, a second motor 502, a worm 503, a worm wheel 504, a shaft 505 and a roller 506. The mounting box 501 is fixed to the side of the support plate 401. The front end of the mounting box 501 is installed with the second motor 502, and the output end of the second motor 502 is installed with the worm 503. The worm 503 is parallel to the length direction of the mounting box 501. Both ends of the interior of the mounting box 501 are rotatably installed with worm wheels 504 that engage with the worm 503. The sides of the worm wheel 504 are installed with shafts 505. The shafts 505 are rotatably connected to the mounting box 501 through bearings and extend to the inside of the support plate 401. Rollers 506 are fixed on the shafts 505. The tops of the rollers 506 protrude from the inner side of the V-shaped guide groove 403. The rollers 506 are rotatably connected to the support plate 401.

[0064] Local working principle: The second motor 502 drives the worm 503 to rotate, and the worm 503 engages with the worm wheels 504 on both sides to transmit the rotational motion to the shaft 505. The shaft 505 passes through the support plate 401 and fixes the roller 506. The roller 506 protrudes from the inner side of the V-shaped guide groove 403 and directly contacts the rotor shaft to control the rotation of the rotor. The worm wheel 504 and worm 503 transmission are self-locking, which can ensure that the roller 506 rotates at a uniform speed to prevent the rotor from slipping. When the second motor 502 rotates forward and reverse, the roller 506 drives the rotor shaft to rotate in the V-shaped guide groove 403, thereby realizing precise switching of the magnet insertion position.

[0065] In this embodiment, the side bracket 7 includes a lower vertical plate 701, an upper vertical plate 702 and a second cylinder 704. The lower vertical plate 701 is vertically fixed on the top of the mounting plate 2. The upper vertical plate 702 is vertically slidably provided on the inner side of the lower vertical plate 701. The second cylinder 704 is vertically installed on the top of the lower vertical plate 701. The output end of the second cylinder 704 is connected to the upper vertical plate 702.

[0066] Partial working principle: When the piston rod of the second cylinder 704 is extended and retracted, it pushes the upper vertical plate 702 to slide vertically along the height direction of the lower vertical plate 701. By adjusting the height of the upper vertical plate 702, the storage cylinder 9 of the magnet insertion mechanism can be aligned with the vertical height of the rotor V-groove, and the ejection port 10 can be aligned with the V-groove.

[0067] In this embodiment, a groove 703 is formed on the mating sides of the lower vertical plate 701 and the upper vertical plate 702 . A limiting rod 705 is fixed at the bottom of the groove 703 on the lower vertical plate 701 . The limiting rod 705 is vertically slidably connected to the upper vertical plate 702 .

[0068] Partial working principle: When the piston rod of the second cylinder 704 is extended and retracted, it pushes the upper vertical plate 702 to slide up and down along the groove 703 on the inner side of the lower vertical plate 701. The limiting rod 705 ensures that the sliding direction is vertical to avoid deviation.

[0069] In this embodiment, the magnet insertion mechanism includes a support plate 8, a storage cylinder 9, an ejection port 10, a third cylinder 11, a push plate 12 and a metal block 14. The end face of the support plate 8 is rotatably installed on the inner side of the upper vertical plate 702 through a rotating shaft. The top of the support plate 8 is installed with a third cylinder 11 along the length direction, and the output end of the third cylinder 11 is horizontally installed with a push plate 12. The storage cylinder 9 is vertically fixed at one end of the top of the support plate 8 away from the upper vertical plate 702. The bottom end of the storage cylinder 9 is provided with an ejection port 10 that cooperates with the push plate 12. The bottom end of the storage cylinder 9 is fixed with a metal block 14, and the magnet is magnetically attracted to the top of the metal block 14. The metal block 14 is a neodymium iron boron permanent magnet, brand N35, surface galvanized, and has a residual magnetism ≥1.2T to ensure that the magnet is firmly adsorbed.

[0070] Local working principle: The metal block 14 at the bottom end of the storage cylinder 9 fixes the magnet by magnetic attraction, and the third cylinder 11 drives the push plate 12 to push the magnet out of the push port 10 to achieve linear insertion. The end face of the support plate 8 is installed on the inner side of the upper vertical plate 702 through a rotating shaft. The angle adjustment mechanism 13 can be used to adjust the insertion angle of the magnet to match the inclination direction of the V-groove.

[0071] In this embodiment, the angle adjustment mechanism 13 includes a first transverse plate 1301, a second transverse plate 1302, a limiting plate 1303, a first through slot 1304, a second through slot 1305, a first slide rod 1306, a push rod 1307, a fourth cylinder 1308, a second slide rod 1309 and a spring 1310. The first transverse plate 1301 is fixed at the middle position of the top of the upper vertical plate 702. A second transverse plate 1302 is provided between the first transverse plates 1301. The limiting plates 1303 are fixed on both sides of the second transverse plate 1302. The inner side of the limiting plate 1303 is in contact with the outer side of the first transverse plate 1301. A first through slot 1304 is provided between the two ends of the second transverse plate 1302 and the inner end of the first transverse plate 1301. A second through slot 1300 connected to the first through slot 1304 is provided between the two sides of the first transverse plate 1301. 5. A first slide rod 1306 is vertically slidably provided in the first through slot 1304 inside the first transverse plate 1301, and a second slide rod 1309 is vertically slidably provided in the first through slot 1304 inside the second transverse plate 1302. The second slide rods 1309 are horizontally slidably connected to the first slide rods 1306 respectively. A fourth cylinder 1308 is vertically installed at the middle position of the top of the second transverse plate 1302, and the output end of the fourth cylinder 1308 is connected to the second slide rod 1309. A spring 1310 is provided between the first transverse plate 1301 and the second transverse plate 1302. The spring 1310 is a cylindrical helical compression spring with a steel wire diameter of 2 mm and a free length of 50 mm. The storage cylinder 9 is respectively located on different sides of the two groups of first transverse plates 1301. A push rod 1307 is provided between the outer side of the first slide rod 1306 and the side of the storage cylinder 9.

[0072] When the distance between the mounting plates 2 is increased, the spring 1310 will be stretched, and the spring 1310 can ensure that the second horizontal plate 1302 is located between the first horizontal plate 1301. When the distance between the mounting plates 2 is decreased, the spring 1310 will pull and reset the horizontal plates, and the limit plate 1303 limits the linear sliding between the second horizontal plate 1302 and the first horizontal plate 1301 to ensure the angle adjustment accuracy.

[0073] like Figures 1-8 As shown, this embodiment provides a method for preparing a low-stress NdFeB permanent magnet, and the process is as follows:

[0074] Step 1: Pass the rotor shaft through the center of the rotor and secure it. Adjust the spacing between the two sets of support mechanisms 4 using the spacing adjustment mechanism 3 according to the thickness of the rotor, ensuring that the spacing between the support mechanisms 4 is the same as the thickness of the rotor. Then, place the rotor shaft horizontally on top of the two sets of support mechanisms 4, with the rotor located between the two sets of support mechanisms 4.

[0075] Step 2: Adjust the vertical height of the side bracket 7 and adjust the angle of the magnet insertion mechanism through the angle adjustment mechanism 13. Align the insertion openings on the magnet insertion mechanism with different sides of the V-shaped groove at both ends of the rotor. Use two sets of magnet insertion mechanisms to insert magnets of different magnetic poles, respectively, to ensure that the magnetic poles on both sides of the V-shaped groove are opposite.

[0076] Step 3: Use the magnet insertion mechanism to insert the magnet in a straight line. After a single magnet is inserted, use the rotating mechanism 5 to control the rotation of the rotor to change the insertion position. After the magnet is inserted, start the pushing mechanism 6 to push the rotor out from the inside of the support mechanism 4, remove the rotor, repeat the above steps, and assemble the magnet again.

[0077] The above is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which fall within the scope of protection of the present invention.

Claims

1. A low-stress NdFeB permanent magnet assembly device, comprising a base (1); Its characteristics are: Mounting plates (2) are slidably provided at both ends of the top of the base (1), and a spacing adjustment mechanism (3) for slidingly controlling the two sets of mounting plates (2) is provided on the base (1); A support mechanism (4) for supporting the rotor shaft is vertically provided at one end of the top of the mounting plate (2) near the middle of the base (1); The sides of the support mechanism (4) are each provided with a rotating mechanism (5) for driving the rotor to rotate at a constant speed; A mechanism (6) for pushing the rotor toward the front end is provided at the middle position of the top of the base (1); Both ends of the top of the base (1) are provided with magnet insertion mechanisms, and the two sets of magnet insertion mechanisms are respectively located on both sides of the base (1); A side bracket (7) for controlling the lifting and lowering of the magnet insertion mechanism is provided at one end of the top of the mounting plate (2) away from the ejection mechanism (6); An angle adjustment mechanism (13) is provided between the tops of the two groups of side brackets (7) for controlling the rotation angles of the two groups of magnet insertion mechanisms.

2. The low stress NdFeB permanent magnet assembly device according to claim 1, characterized in that: The spacing adjustment mechanism (3) comprises a strip groove (301), a slider (302), a screw (303) and a first motor (304). The strip groove (301) is provided at both ends of the top of the base (1), and the strip groove (301) is parallel to the length direction of the base (1). Sliders (302) are slidably provided inside the strip groove (301). The tops of the two groups of sliders (302) are respectively fixedly connected to the mounting plate (2). A screw (303) is rotatably installed inside the base (1) along the length direction. The two ends of the screw (303) are respectively rotatably connected to the slider (302). The first motor (304) is installed at one end of the base (1), and the output end of the first motor (304) is fixedly connected to the slider (302).

3. The low stress NdFeB permanent magnet assembly device according to claim 1, characterized in that: The support mechanism (4) comprises a support plate (401), a transverse guide groove (402), a V-shaped guide groove (403) and a notch groove (404); the support plate (401) is vertically fixed on the top of the mounting plate (2); a protrusion is provided on the front side of the top of the support plate (401); a transverse guide groove (402) is provided on the top of the support plate (401) along the width direction; a V-shaped guide groove (403) is provided on the inner bottom of the transverse guide groove (402); and a notch groove (404) is provided on the top of the front side of the transverse guide groove (402).

4. The low stress NdFeB permanent magnet assembly device according to claim 3, characterized in that: The ejection mechanism (6) comprises a first cylinder (601), a connecting rod (602) and a triangular block (603). The first cylinder (601) is arranged at the middle position of the base (1) parallel to the width direction of the base (1). The output end of the first cylinder (601) is installed with a connecting rod (602). Both ends of the connecting rod (602) are fixed with triangular blocks (603). The inclined surface of the triangular block (603) faces the front side of the base (1).

5. The low stress NdFeB permanent magnet assembly device according to claim 3, characterized in that: The rotating mechanism (5) includes a mounting box (501), a second motor (502), a worm (503), a worm wheel (504), a shaft (505) and a roller (506). The mounting box (501) is fixed to the side of the support plate (401). The front end of the mounting box (501) is mounted with the second motor (502). The output end of the second motor (502) is mounted with a worm (503). The worm (503) is parallel to the length direction of the mounting box (501). The mounting box (501) ) are rotatably mounted at both ends of the interior thereof with worm wheels (504) meshing with the worm gear (503), and shafts (505) are mounted on the sides of the worm wheels (504). The shafts (505) are rotatably connected to the bearing mounting box (501) and extend to the interior of the support plate (401). Rollers (506) are fixed on the shafts (505), and the tops of the rollers (506) protrude from the inner sides of the V-shaped guide grooves (403). The rollers (506) are rotatably connected to the support plate (401).

6. The low stress NdFeB permanent magnet assembly device according to claim 1, characterized in that: The side bracket (7) comprises a lower vertical plate (701), an upper vertical plate (702) and a second cylinder (704); the lower vertical plate (701) is vertically fixed on the top of the mounting plate (2); the upper vertical plate (702) is vertically slidably provided on the inner side of the lower vertical plate (701); the second cylinder (704) is vertically installed on the top end of the lower vertical plate (701); and the output end of the second cylinder (704) is connected to the upper vertical plate (702).

7. The low stress NdFeB permanent magnet assembly device according to claim 6, characterized in that: The mating sides of the lower vertical plate (701) and the upper vertical plate (702) are both provided with grooves (703), and a limiting rod (705) is fixed at the bottom of the groove (703) on the lower vertical plate (701), and the limiting rod (705) and the upper vertical plate (702) are vertically slidably connected.

8. The low stress NdFeB permanent magnet assembly device according to claim 6, characterized in that: The magnet insertion mechanism comprises a supporting plate (8), a storage cylinder (9), an ejection port (10), a third cylinder (11), a push plate (12) and a metal block (14). The end face of the supporting plate (8) is rotatably mounted on the inner side of the upper vertical plate (702) via a rotating shaft. The top of the supporting plate (8) is mounted with the third cylinder (11) along the length direction. The output end of the third cylinder (11) is horizontally mounted with the push plate (12). The top of the supporting plate (8) away from the upper vertical plate (702) is vertically fixed with the storage cylinder (9). The bottom end of the storage cylinder (9) is provided with an ejection port (10) matched with the push plate (12). The bottom end of the storage cylinder (9) is fixed with a metal block (14), and the magnet is magnetically attracted to the top of the metal block (14).

9. The low stress NdFeB permanent magnet assembly device according to claim 8, characterized in that: The angle adjustment mechanism (13) includes a first horizontal plate (1301), a second horizontal plate (1302), a limiting plate (1303), a first through slot (1304), a second through slot (1305), a first slide rod (1306), a push rod (1307), a fourth cylinder (1308), a second slide rod (1309) and a spring (1310). The first horizontal plate (1301) is fixed at the middle position of the top of the upper vertical plate (702). A second transverse plate (1302) is provided between the first transverse plate (1301), and a limiting plate (1303) is fixed on both sides of the second transverse plate (1302). The inner side of the limiting plate (1303) is in contact with the outer side of the first transverse plate (1301). A first through groove (1304) is provided between the two ends of the second transverse plate (1302) and the inner end of the first transverse plate (1301). A through groove (1304) is provided between the two sides of the first transverse plate (1301). (1304) is connected to the second through slot (1305), a first slide rod (1306) is vertically slidably provided in the first through slot (1304) inside the first transverse plate (1301), a second slide rod (1309) is vertically slidably provided in the first through slot (1304) inside the second transverse plate (1302), the second slide rod (1309) is horizontally slidably connected to the first slide rod (1306), and the top of the second transverse plate (1302) is provided with a first slide rod (1306). A fourth cylinder (1308) is vertically installed at the middle position of the first horizontal plate (1301), the output end of the fourth cylinder (1308) is connected to the second slide rod (1309), a spring (1310) is provided between the first horizontal plate (1301) and the second horizontal plate (1302), the storage cylinder (9) is located on different sides of the two groups of first horizontal plates (1301), and a push rod (1307) is provided between the outer side of the first slide rod (1306) and the side of the storage cylinder (9).

10. A method for preparing a low-stress NdFeB permanent magnet, based on a low-stress NdFeB permanent magnet assembly device according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: The rotor shaft passes through the center of the rotor and is fixed. The spacing between the two sets of support mechanisms (4) is adjusted using the spacing adjustment mechanism (3) according to the thickness of the rotor to ensure that the spacing between the support mechanisms (4) is the same as the thickness of the rotor. The rotor shaft is then placed horizontally on top of the two sets of support mechanisms (4), with the rotor located between the two sets of support mechanisms (4); Step 2: Adjust the vertical height of the side bracket (7) and adjust the angle of the magnet insertion mechanism through the angle adjustment mechanism (13), and make the insertion openings on the magnet insertion mechanism correspond to different sides of the V-shaped groove at both ends of the rotor. The two sets of magnet insertion mechanisms are used to insert magnets of different magnetic poles respectively to ensure that the magnetic poles on both sides of the V-shaped groove are opposite; Step 3: Use the magnet insertion mechanism to insert the magnets linearly. After a single magnet is inserted, use the rotation mechanism (5) to control the rotation of the rotor to change the insertion position. After the magnet is inserted, start the ejection mechanism (6) to eject the rotor from the inside of the support mechanism (4), remove the rotor, repeat the above steps, and assemble the magnet again.

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