Rotor assembly and motor

Abstract

The present invention provides a rotor assembly and motor, wherein the rotor assembly comprises: an inner core capable of being sleeved on a rotor shaft; and multiple outer cores arranged along the circumference of the inner core on the outer peripheral wall of the inner core, with a first bracket disposed between adjacent outer cores. A magnetic steel is detachably disposed within the first bracket, and the inner and outer cores form the rotor core. This overcomes the drawback of prior art techniques in which the magnetic steel is bonded using glue, requiring a wait for complete bonding before proceeding to the next step of rotor plastic coating. This waiting process wastes significant production time and reduces production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a rotor assembly and a motor. Background Art

[0002] See also Figure 1 As shown, the traditional embedded rotor structure is to use glue to stick the magnet 1 into the magnet slot of the rotor core 2, and then the rotor with the magnet pasted is wrapped with plastic 3 to form a plastic-coated rotor. When the magnet 1 is bonded to the inside of the rotor core 2, the traditional embedded rotor structure needs to wait for the glue to be completely bonded before the next step of rotor wrapping 3 can be carried out. This waiting process is likely to waste a lot of production time, resulting in reduced production efficiency. The magnet 1 is bonded with glue. If it is found that the magnetization of the rotor magnet 1 is abnormal during inspection, it is difficult to rework the rotor, which wastes a lot of repair time. Summary of the Invention

[0003] Therefore, the present invention provides a rotor assembly and a motor that can overcome the defects in the prior art in that the magnetic steel is bonded by glue, and the next step of rotor plastic coating can only be carried out after the glue is completely bonded. The waiting process wastes a lot of production time, resulting in reduced production efficiency.

[0004] In order to solve the above problems, the present invention provides a rotor assembly, comprising:

[0005] An inner iron core, wherein the inner iron core can be sleeved on the rotor shaft;

[0006] An outer iron core is arranged along the circumference of the inner iron core. Multiple outer iron cores are arranged on the outer peripheral wall of the inner iron core. A first bracket is arranged between two adjacent outer iron cores. A magnetic steel is detachably arranged in the first bracket. The inner iron core and the outer iron core constitute the rotor iron core.

[0007] In some embodiments, the inner iron core includes a first section and a second section. Along the circumference of the inner iron core, the outer iron core is arranged on the outer peripheral wall of the first section and the outer peripheral wall of the second section. The first bracket is arranged between two adjacent outer iron cores on the first section, and the second bracket is arranged between two adjacent outer iron cores on the second section. The second bracket has the same structure as the first bracket. Taking the cross-section of the inner iron core as the projection plane, within the projection plane, there is a first connecting line between the center point of the second bracket and the center of the inner iron core, and there is a second connecting line between the center point of the first bracket and the center of the inner iron core. An angle α is formed between the first connecting line and the second connecting line.

[0008] In some embodiments, the first bracket includes a fixing member and a main body, the fixing member is arranged on the inner iron core, the main body is arranged on the fixing member, the main body has a third card slot, along the axial direction of the inner iron core, the third card slot passes through the main body, the magnetic steel can be clamped in the third card slot, a first card slot is formed between two adjacent main bodies, and the outer iron core is located in the first card slot.

[0009] In some embodiments, rotor end covers are provided at both ends of the rotor core, and a first clamp is provided on the end surface of the main body facing away from the inner core. Along the axial direction of the inner core, the first clamp at least partially extends out of the main body and can clamp the rotor end cover.

[0010] In some embodiments, along the axial direction of the rotor core, the fixing member at least partially extends out of the rotor core, and the portion of the fixing member extending out of the rotor core can be connected to the rotor end cover. The fixing member has a groove on the side facing the inner core, and along the axial direction of the inner core, a protrusion is provided on the inner core, the protrusion corresponds to the groove, and the protrusion is plugged into the groove.

[0011] In some embodiments, a fixing plate is provided on the first clamping member, and both sides of the fixing plate can extend out of the first clamping member and form a gap between the fixing plate and the main body. Along the circumference of the rotor core, both sides of the outer core have circumferential extension portions, and the circumferential extension portions are located on the outer core relative to the inner core, close to the end surface of the outer core facing away from the inner core, and the circumferential extension portions can be stuck in the gap.

[0012] In some embodiments, the rotor end cover includes a cover body, the cross-section of the cover body is annular, and a plurality of seventh slots are provided on the outer peripheral wall of the cover body along the circumference of the cover body. The first clamping member can be clamped to the cover body through the seventh slots. Along the axial direction of the rotor core, the height of the fixing plate is not greater than the height of the main body. A second slot is provided between the fixing plate and the first clamping member. A fastening ring is provided on the rotor core, and the fixing ring is clamped in the second slot. The fastening ring is connected to the outer peripheral wall of the cover body by a threaded connection.

[0013] In some embodiments, a plurality of fifth slots are provided on the end surface of the cover body facing the rotor core. The fifth slots are arranged along the axial direction of the cover body, and the fifth slots correspond to the magnetic steels one by one.

[0014] In some embodiments, the rotor core has multiple heat dissipation structures along the axial direction of the rotor core, the cover body is provided with multiple heat dissipation holes, and at least some of the heat dissipation holes in the cover body correspond one-to-one to the heat dissipation structures of the rotor core.

[0015] In some embodiments, the end surface of the cover body facing the rotor core matches the rotor core, and a retaining ring is provided on the inner peripheral wall of the cover body, and the retaining ring can abut against the inner core.

[0016] In some embodiments, fastening rings are provided at both ends of the rotor core, and the fastening rings are connected to the inner circumferential wall of the cover body. Along the circumference of the cover body, a plurality of fastening plates are provided on the inner circumferential wall of the cover body, and a plurality of second clips are provided on the outer circumferential wall of the fastening ring, and the second clips correspond one-to-one to the fastening plates.

[0017] In some embodiments, an eighth slot is provided on the side wall of the fastening ring facing the rotor core. The eighth slot is annular and is located on the fastening ring close to the inner peripheral wall relative to the outer peripheral wall. The eighth slot matches the inner core.

[0018] In some embodiments, a plurality of ninth slots are provided on a side wall of the fastening ring at one end of the rotor core facing away from the rotor core along the circumference of the fastening ring.

[0019] In some embodiments, a mounting plate is provided on the outer peripheral wall of the fastening ring at the other end of the rotor core, and a plurality of blades are provided on the mounting plate along the circumference of the fastening ring. The blades are at least partially located outside the mounting plate, and the blades are located outside the cover body.

[0020] The present invention also provides a motor, comprising the rotor assembly described in any one of the preceding items.

[0021] The present invention provides a rotor assembly and a motor, wherein the rotor core consists of an inner core and an outer core, the outer core is arranged on the outer peripheral wall of the inner core along the circumference of the inner core, a first bracket is arranged between two adjacent outer cores, a magnet is detachably arranged in the first bracket, and the first bracket and the outer core are cooperatively connected to each other, replacing the installation method in the prior art in which the magnet needs to be glued to the rotor core, reducing the glue drying and solidification time required for bonding the magnet to the rotor core, improving production efficiency, and making the installation and disassembly of the rotor easier, thereby facilitating the rework and repair of the motor rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a rotor in the prior art;

[0023] Figure 2 Schematic diagram of the structure of the rotor assembly according to an embodiment of the present invention;

[0024] Figure 3 A top view of a rotor assembly according to an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of the structure of the rotor core in the rotor assembly according to an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of the structure of the magnetic steel in the rotor assembly according to an embodiment of the present invention;

[0027] Figure 6 1. It is an assembly diagram of the magnetic steel in the rotor assembly according to an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the structure of the cover body in the rotor assembly according to an embodiment of the present invention;

[0029] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0030] Figure 9 A top view of a cover body in a rotor assembly according to an embodiment of the present invention;

[0031] Figure 10 for Figure 9 Enlarged view of point B in the middle;

[0032] Figure 11 Schematic diagram of the structure of the fastening ring in the rotor assembly according to an embodiment of the present invention;

[0033] Figure 12 This is a diagram of the rotor assembly with its cover closed according to an embodiment of the present invention;

[0034] Figure 13 A front view of a fastening ring in a rotor assembly according to an embodiment of the present invention;

[0035] Figure 14 A rear view of a fastening ring in a rotor assembly according to an embodiment of the present invention;

[0036] Figure 15 This is an assembly diagram of blades in a rotor assembly according to an embodiment of the present invention;

[0037] Figure 16 This is a front view of a blade in a rotor assembly according to an embodiment of the present invention;

[0038] Figure 17 is an assembly diagram of a fastening ring in a rotor assembly according to an embodiment of the present invention;

[0039] Figure 18 for Figure 17 Enlarged view of point C in the middle;

[0040] Figure 19 An exploded view of a rotor assembly according to an embodiment of the present invention;

[0041] Figure 20 A schematic structural diagram of a bearing in a motor according to another embodiment of the present invention;

[0042] Figure 21 A schematic structural diagram of a retaining spring in a motor according to another embodiment of the present invention;

[0043] Figure 22 A schematic diagram of the rotor structure of a motor according to another embodiment of the present invention;

[0044] Figure 23 This is a schematic structural diagram of a stator in a motor according to another embodiment of the present invention;

[0045] Figure 24 A top view of a stator in a motor according to another embodiment of the present invention;

[0046] Figure 25 A schematic structural diagram of a control board in a motor according to another embodiment of the present invention;

[0047] Figure 26 This is a schematic structural diagram of the assembled rotor and stator of a motor according to another embodiment of the present invention;

[0048] Figure 27 A schematic diagram of an end cover of a stator in a motor according to another embodiment of the present invention;

[0049] Figure 28 A bottom view of an end cover of a stator in a motor according to another embodiment of the present invention;

[0050] Figure 29 A schematic structural diagram of a motor according to another embodiment of the present invention;

[0051] Figure 30 An exploded view of a motor according to another embodiment of the present invention;

[0052] Figure 31 A schematic structural diagram of a rotor assembly according to another embodiment of the present invention;

[0053] Figure 32 for Figure 31 Enlarged view of point D in the middle.

[0054] The reference numerals indicate:

[0055] 1. Magnet; 2. Rotor core; 201. Inner core; 202. Outer core; 3. Plastic wrap; 4. First bracket; 5. Fixing element; 6. First slot; 7. First clamp; 8. Second slot; 9. Second bracket; 10. Third slot; 11. Fourth slot; 12. Fifth slot; 13. Positioning hole; 14. Sixth slot; 15. Cover; 16. Fastening tab; 17. Fastening ring; 18. Heat dissipation hole; 19. , seventh slot; 20, eighth slot; 21, second clip; 22, ninth slot; 23, blade; 24, fastening ring; 25, bearing; 26, retaining ring; 27, rotor shaft; 28, pin; 29, third bracket; 30, first placement position; 31, wire outlet; 32, tenth slot; 33, second placement position; 34, power cord; 35, pin hole; 36, control board; 37, mounting column; 38, bearing chamber. DETAILED DESCRIPTION

[0056] See also Figures 2 to 32 As shown, according to an embodiment of the present invention, a rotor assembly is provided, comprising: an inner core 201, the inner core 201 being sleeved on a rotor shaft 27; an outer core 202, a plurality of outer cores 202 being arranged on an outer peripheral wall of the inner core 201 along the circumference of the inner core 201, a first bracket 4 being arranged between two adjacent outer cores 202, a magnetic steel 1 being detachably arranged in the first bracket 4, see Figure 4 As shown, the inner iron core 201 and the outer iron core 202 form the rotor iron core 2. In this technical solution, see Figure 2 and Figure 5 As shown, the rotor core 2 is composed of an inner core 201 and an outer core 202. The outer core 202 is arranged on the outer peripheral wall of the inner core 201 along the circumference of the inner core 201. A first bracket 4 is arranged between two adjacent outer cores 202. The first bracket 4 is detachably provided with a magnetic steel 1. The first bracket 4 and the outer core 202 are connected to each other in cooperation with each other, replacing the installation method in the prior art in which the magnetic steel needs to be glued to the rotor core, reducing the glue drying and solidification time required for bonding the magnetic steel to the rotor core, improving production efficiency, and making the installation and disassembly of the rotor easier, which is convenient for rework and maintenance of the motor rotor; preferably, the first bracket 4 is stuck between the two outer cores, and the end surface of the first bracket 4 facing away from the inner core 201 and the end surface of the outer core 202 facing away from the inner core 201 form a circle to form a complete rotor structure, see Figure 31 and 32 As shown, the embedded rotor assembly structure can be changed to a surface-mounted structure. By utilizing the gap design between the magnetic steel and the rotor core in the surface-mounted rotor and the rotor bracket, upper end cover, lower end cover, fastening ring and other structures, a surface-mounted rotor skewed pole assembly can be realized, which can also effectively improve the motor performance. The present invention is a rotor assembly and a motor production method thereof, which mainly consists of Figure 15 Rotor assembly and Figure 16 Plastic coated stator, Figure 17 Control panel, Figure 19 The end cover is combined. Figure 15 The rotor support assembly in the present invention is the focus of the present invention. Figure 13 The rotor bracket assembly replaces the traditional overmolded inline rotor. It assembles the upper and lower rotor cores and magnets together, reducing the time required to glue the magnets to the core and then overmold the rotor, thus improving production efficiency. The rotor assembly also allows for rotor pole skew, reducing cogging torque, harmonic noise, and improving motor performance.

[0057] In some embodiments, see Figure 6As shown, the inner core 201 includes a first section and a second section. Along the circumference of the inner core 201, the outer core 202 is arranged on the outer circumferential wall of the first section and the outer circumferential wall of the second section. The first bracket 4 is arranged between two adjacent outer cores 202 on the first section, and a second bracket 9 is arranged between two adjacent outer cores 202 on the second section. The second bracket 9 has the same structure as the first bracket 4. Taking the cross section of the inner core 201 as the projection plane, within the projection plane, there is a first connecting line between the center point of the second bracket 9 and the center of the inner core 201, and there is a second connecting line between the center point of the first bracket 4 and the center of the inner core 201. An angle α is formed between the first connecting line and the second connecting line. In this technical solution, the second bracket 9 has the same structure as the first bracket 4, so that the magnetic field strength generated in the first section is consistent with that in the second section. Specifically, the end faces of the second bracket 9 and the first bracket 4 facing each other are located in the same plane, or the end faces of the second bracket 9 and the first bracket 4 facing each other are at least partially connected. The second bracket 9 and the first bracket 4 are staggered with each other so that the magnetic steel 1 in the second bracket 9 forms an angle with the magnetic steel 1 in the first bracket 4, also known as a skew slot, which can reduce the cogging torque of the motor. The cross section of the inner iron core 201 is used as the projection surface. There is a first connecting line between the center point of the second bracket 9 and the center of the inner iron core 201, and there is a second connecting line between the center point of the first bracket 4 and the center of the inner iron core 201. An angle α is formed between the first connecting line and the second connecting line, so that the rotor forms a skew pole structure. Preferably, 0°≤α≤10°, which reduces the motor cogging torque, reduces harmonics, has a better back electromotive force waveform, and enhances the motor performance. The second bracket 9 and the first bracket 4 can be integrally formed to ensure the strength of the bracket, facilitate production, and reduce the weight of the bracket, thereby making the motor lightweight, reducing the installation process and reducing costs. The rotor bracket is formed by integrating two identical structures, the second bracket 9 and the first bracket 4, and staggered at an angle α (0°≤α≤10°) (the specific angle needs to be designed according to the motor performance requirements), wherein the second bracket 9 and the first bracket 4 are each provided with 10 evenly distributed first clamps 7, which are respectively used to clamp the upper and lower rotor end covers; and a first clamping groove 6 and a third clamping groove 10, which are respectively used to fix the rotor core and the magnet; and a fixing member 5 with an internal thread, which is used to connect with the rotor end cover connecting clamping groove, and the threads of the fixing member 5 and the rotor connecting clamping groove can cooperate with each other to form a complete thread structure; the thread structure of the fixing member 5 of the second bracket 9 and the first bracket 4 of the rotor adopts an opposite thread structure, for example: if the thread of the first bracket 4 is clockwise, the thread of the second bracket 9 is counterclockwise, and the thread direction of the second bracket 9 and the first bracket 4 is opposite to the direction of rotation of the rotor; the second bracket 9 and the first bracket 4 are provided with a fastening ring clamping groove for installing a fastening ring to prevent the first clamp 7 from being deformed due to centrifugal force during the rotation of the motor.The first clamping member 7 is in the shape of a barbed hook, and the upper and lower rotor end covers are fastened to the bracket using the barbed hook-shaped buckles, and an inverted L-shaped structure can be adopted.

[0058] In some embodiments, the first bracket 4 includes a fixing member 5 and a main body, the fixing member 5 is arranged on the inner iron core 201, the main body is arranged on the fixing member 5, the main body has a third card slot 10, along the axial direction of the inner iron core 201, the third card slot 10 passes through the main body, the third card slot 10 can be clamped in the third card slot 10, a first card slot 6 is formed between two adjacent main bodies, and the outer iron core 202 is located in the first card slot 6. In this technical solution, the magnet 1 is clamped by the third clamping slot 10, and a first clamping slot 6 is formed between two adjacent main bodies. The outer iron core 202 is located in the first clamping slot 6, so that the main body and the outer iron core 202 are clamped with each other, which is convenient for fixing and disassembling the magnet 1 and the rotor core 2, replacing the traditional plastic-coated rotor. Specifically, in the cross section of the inner iron core 201, the width of the end of the outer iron core 202 facing the inner iron core 201 is smaller than the width of the end of the outer iron core 202 facing away from the inner iron core 201. Correspondingly, the width of the end of the main body facing the inner iron core 201 is smaller than the width of the end of the main body facing away from the inner iron core 201, so as to meet the setting requirements. Preferably, 10 first brackets 4 and 10 second brackets 9 are used in this solution to meet the magnetic force requirements of the rotor.

[0059] In some embodiments, rotor end caps are provided at both ends of the rotor core 2. A first latch 7 is provided on the end surface of the main body facing away from the inner core 201. The first latch 7 at least partially extends out of the main body in the axial direction of the inner core 201 and is capable of engaging with the rotor end caps. In this technical solution, the rotor end caps are used to limit the rotor core 2 in the axial direction. The first latch 7 is provided on the end surface of the main body facing away from the inner core 201. The first latch 7 engages with the rotor end caps, thereby fixing the first bracket 4, the rotor core 2, and the rotor end caps as a whole, ensuring the stability of the rotor assembly.

[0060] In some embodiments, along the axial direction of the rotor core 2, the fixing member 5 at least partially extends out of the rotor core 2, and the portion of the fixing member 5 extending out of the rotor core 2 can be connected to the rotor end cover, and the fixing member 5 has a groove on the side facing the inner core 201, and along the axial direction of the inner core 201, a protrusion is provided on the inner core 201, and the protrusion corresponds to the groove, and the protrusion is plugged into the groove. In this technical solution, the second protrusions are arranged at intervals in the axial direction of the inner iron core 201, and the fixing part 5 is provided with an internal thread on the side facing the inner iron core 201. The rotor end cover can be threadedly connected to the fixing part 5. Along the axial direction of the inner iron core 201, a protrusion is provided on the inner iron core 201, and the protrusion corresponds to the groove. The protrusion is plugged into the groove. Through the cooperation of the protrusion and the groove, the fixing part 5 is made to cooperate with the inner iron core 201, and the fixing part 5 is further connected to ensure the stability of the first bracket 4. Preferably, the height of the rotor end cover matches the length of the part of the fixing part 5 extending out of the rotor core 2, so that the rotor end cover has a better limiting effect on the rotor core.

[0061] In some embodiments, a fixing plate is provided on the first clamping member 7, and both sides of the fixing plate can extend out of the first clamping member 7 and form a gap between the fixing plate and the main body. Along the circumference of the rotor core 2, both sides of the outer core 202 have circumferential extensions, and the circumferential extensions are located on the end surface of the outer core 202 facing away from the inner core 201 relative to the inner core 201, and the circumferential extensions can be stuck in the gap. In this technical solution, see Figure 12 As shown, both sides of the fixing plate can extend out of the first clamping member 7. Specifically, the width of the fixing plate is greater than the width of the first clamping member 7, so that a gap is formed between the fixing plate and the main body. Along the circumference of the rotor core 2, both sides of the outer core 202 have circumferential extensions, and the circumferential extensions are located on the outer core 202 relative to the inner core 201, close to the end surface of the outer core 202 facing away from the inner core 201. Preferably, on the transverse cross-section of the rotor core 2, the side of the outer core 202 facing away from the inner core 201 is T-shaped. During installation, the circumferential extension is stuck in the gap, so that the connection between the outer core 202 and the first bracket 4 is more stable, and it can also form a clamping connection with the first bracket 4 to ensure that the first bracket 4 is firmly installed and prevent the first bracket 4 from separating from the outer core 202 due to centrifugal force.

[0062] In some embodiments, in conjunction with Figures 7 to 9As shown, the rotor end cover includes a cover body 15, the cross section of the cover body 15 is annular, and along the circumference of the cover body 15, a plurality of seventh slots 19 are provided on the outer peripheral wall of the cover body 15, and the first clamping member 7 can be clamped to the cover body 15 through the seventh slots 19. Along the axial direction of the rotor core 2, the height of the fixing plate is not greater than the height of the main body, and a second slot 8 is provided between the fixing plate and the first clamping member 7. Figure 11 As shown, a fastening ring 17 is provided on the rotor core 2 , and the fastening ring 17 is clamped in the second clamping groove 8 . The fastening ring 17 is connected to the outer peripheral wall of the cover body 15 via threads. In this technical solution, the first clamping member 7 can be clamped to the cover body 15 through the seventh clamping groove 19, and a fastening ring 17 is provided on the rotor core 2, and the fastening ring 17 is clamped in the second clamping groove 8. When the first clamping member 7 is clamped to the cover body 15, the fastening ring 17 can limit the first clamping member 7 to prevent the first clamping member 7 from being deformed due to centrifugal force. The fastening ring 17 and the outer peripheral wall of the cover body 15 are threadedly connected, which can further ensure the stability of the rotor assembly assembly, and the threaded connection can further ensure the limitation of the first clamping member 7 by the fastening ring 17. Preferably, corresponding positioning holes 13 can be provided on the outer peripheral wall of the cover body 15 and the fastening ring 17. When the assembly is completed, screws are installed in the positioning holes 13 to further ensure that the cover body 15 and the fastening ring 17 are firmly connected to prevent the fastening ring 17 from loosening due to rotation.

[0063] In some embodiments, see Figure 7 As shown, the end surface of the cover 15 facing the rotor core is provided with a plurality of fifth slots 12, and the fifth slots 12 are arranged along the axial direction of the cover 15, and the fifth slots 12 correspond one-to-one with the magnetic steel 1. In this technical solution, the end surface of the cover 15 facing the rotor core is provided with a plurality of fifth slots 12. Preferably, the height of the magnetic steel 1 is higher than the height of the first bracket 4 to ensure the magnetic field strength of the rotor. During installation, the fifth slots 12 can be inserted into the fifth slots 12, which can limit the axial direction of the magnetic steel 1 and further ensure that the magnetic steel 1 is firmly installed. Of course, the fifth slots 12 can also be omitted. It is only necessary to set the length of the magnetic steel 1 accordingly. The cover 15 can block the magnetic steel 1 and limit the axial downward position of the magnetic steel 1.

[0064] In some embodiments, see Figure 9As shown, along the axial direction of the rotor core 2, the rotor core 2 has multiple heat dissipation structures, and the cover 15 is provided with multiple heat dissipation holes 18. At least some of the heat dissipation holes 18 in the cover 15 correspond one-to-one with the heat dissipation structures of the rotor core 2. In this technical solution, the rotor core 2 has multiple heat dissipation structures. Specifically, multiple through holes are opened along the axial direction of the rotor core 2 to improve the heat dissipation effect of the rotor core 2. At least some of the heat dissipation holes 18 in the cover 15 correspond one-to-one with the heat dissipation structures of the rotor core 2, while the remaining heat dissipation holes 18 may correspond to the magnetic steel 1, thereby increasing the heat dissipation area of ​​the rotor and enhancing the heat dissipation performance of the rotor.

[0065] In some embodiments, the end surface of the cover 15 facing the rotor core 2 matches the rotor core 2, and a retaining ring is provided on the inner peripheral wall of the cover 15, and the retaining ring can abut against the inner core 201. In this technical solution, the end surface of the cover 15 facing the rotor core 2 matches the rotor core 2. For details, see Figure 8 As shown, the cover 15 has a sixth slot 14 on its end surface facing the rotor core 2. The sixth slot 14 is located at the connection between the fixing member 5 and the inner core 201. The connection between the fixing member 5 and the inner core 201 can be inserted into the sixth slot 14, so that the cover 15 can be completely fitted with the rotor core 2 during installation. Figures 17 to 19 As shown, the force-bearing area of ​​the rotor core 2 in the axial direction is increased, and a retaining ring is provided on the inner peripheral wall of the cover body 15. The retaining ring can abut against the inner core 201. The retaining ring can further limit the axial position of the inner core 201 to ensure that the inner core 201 is pressed tightly.

[0066] In some embodiments, a fastening ring 24 is provided at both ends of the rotor core 2, and the fastening ring 24 is connected to the inner peripheral wall of the cover body 15. Along the circumference of the cover body 15, a plurality of fastening plates 16 are provided on the inner peripheral wall of the cover body 15, and a plurality of second clamping members 21 are provided on the outer peripheral wall of the fastening ring 24. The second clamping members 21 correspond one to one with the fastening plates 16. In this technical solution, see Figure 10 As shown, the second clamp 21 cooperates with the fastening piece 16, preferably, see Figure 13 As shown, one end of the fastening piece 16 is arranged on the inner circumferential wall of the cover body 15, and the other end is a free end, and its free end is arranged along the circumference of the cover body 15. The structure of the second clamping member 21 is the same as that of the fastening piece 16, and the direction of its free end is opposite to the direction of the free end of the fastening piece 16 to form an anti-reversal structure, which can prevent the fastening ring 24 from loosening during the rotation of the rotor. The fastening ring 24 and the cover body 15 also have a threaded connection, and the direction of the thread is opposite to the rotation direction of the motor, which further prevents the risk of the cover body loosening when the motor is working.

[0067] In some embodiments, the side wall of the fastening ring 24 facing the rotor core 2 is provided with an eighth slot 20, the eighth slot 20 being annular and located on the fastening ring 24 near the inner peripheral wall relative to the outer peripheral wall, and the eighth slot 20 matches the inner core 201. In this technical solution, see Figure 14 As shown, the inner core 201 is limited by the eighth slot 20, further limiting the axial displacement of the inner core 201, ensuring the stability of the inner core 201, replacing the glue used in the prior art, improving production efficiency and facilitating maintenance.

[0068] In some embodiments, a plurality of ninth retaining grooves 22 are provided along the circumference of the retaining ring 24 on a sidewall of the retaining ring 24 at one end of the rotor core 2 facing away from the rotor core 2. In this technical solution, the ninth retaining grooves 22 facilitate tightening the retaining ring 24 with a tool during assembly or removing the retaining ring 24 during maintenance.

[0069] In some embodiments, a mounting plate is provided on the outer peripheral wall of the fastening ring 24 at the other end of the rotor core 2. A plurality of blades 23 are provided on the mounting plate along the circumference of the fastening ring 24. The blades 23 are at least partially located outside the mounting plate, and the blades 23 are located outside the cover 15. In this technical solution, see Figure 15 and Figure 16 As shown, when the rotor assembly rotates, the blades 23 rotate accordingly, which can effectively increase the air flow inside the motor and effectively increase the heat dissipation performance of the motor; the heat dissipation blades are aligned with the control board, which can effectively reduce the temperature of the control board. Preferably, the blades 23, the mounting plate and the fastening ring 24 are integrally formed, which is more convenient to produce.

[0070] The present invention provides a rotor assembly that uses two identical rotor cores 2, which are respectively inserted into the second bracket 9 and the first slot 6 of the first bracket 4 of the rotor support to achieve the installation and fixation of the rotor core 2. Preferably, the present invention provides a rotor assembly that uses 20 magnets 1 of the same shape, which are respectively inserted into the third slot 10 of the second bracket 9 and the first bracket 4 in sequence to achieve the installation and fixation of the magnets 1. After the rotor core 2 is inserted into the second bracket 9 and the first bracket 4, the magnets 1 are placed therein, with a certain gap between the magnets 1 and the fixings to facilitate the combination of the rotor end cover and the fixings. The present invention requires an upper and lower rotor end cover that are identical in structure except for the direction of the thread and the direction of the rotor end cover fastening plate 16. The specific rotation direction needs to be consistent with the thread of the fixing 5, that is, opposite to the direction of rotation of the rotor. The surface of the end cover is provided with heat dissipation holes 18 that match the rotor core 2 to increase the heat dissipation area and enhance the heat dissipation performance of the rotor; the rotor end cover core retaining ring is used to cooperate with the end cover fastening ring 17 to complete the fastening function of the rotor core; the upper and lower rotor end covers are respectively provided with a fifth slot 12 for fixing the position of the magnet 1; the rotor end cover is provided with a seventh slot 17 that matches the rotor fixing part 5, and the rotor fixing part 5 can be inserted into the seventh slot 17 of the end cover, and the seventh slot 17 of the end cover is provided with a threaded structure that matches the fixing part 5; the rotor end cover fastening piece 16 is used The end cap fastening ring 24 is fitted with a second latch 21 to prevent loosening after tightening the fastener 24 as the rotor rotates. The end cap also features a seventh rotor latch 19, designed to engage with the first latch 7 on the rotor support. This engagement provides initial tightening of the rotor end cap. The outer ring of the rotor end cap is provided with threads and a fastening ring positioning hole 13. The threads support the first latch 7 during tightening of the fastening ring 17. The fastening ring 17 positioning hole 13 prevents the fastening ring 17 from loosening due to rotor rotation. The fourth latch 11 connects with the fixing member 5 to form a complete threaded structure. The fourth latch 11 and fixing member 5 combine to connect the fastening end cap to the rotor support structure. The fastening ring is fixed to the outer ring of the end cap, and the fastening ring positioning screw is tightened on the end cap to prevent the fastening ring from loosening. The upper and lower end caps are installed in the same manner. The lower end cover fastening ring 24 is provided with a matching connecting groove and a complete thread formed by the matching boss of the bracket to cooperate with each other to realize the function of connecting the bracket and the center of the end cover together; the anti-reverse buckle cooperates with the anti-reverse paddle on the end cover to prevent the fastening ring from loosening during the rotation of the rotor; when the thread of the end cover fastening ring is tightened, the protruding part will press against the iron core and lift the complete thread formed by the end cover and the bracket, so that the end cover and the bracket form a downward force due to their own deformation, and the fastening ring forms an upward lifting force, forming a self-locking structure, which can ensure the stability of the iron core to a certain extent and prevent the iron core from loosening; the fastening slot serves to cooperate with the tool to tighten the fastening ring.The connection is identical except for the direction of thread rotation and the anti-reverse clip. The upper end cover fastening ring is equipped with cooling blades and a guide ring to effectively increase air flow inside the motor and improve the motor's heat dissipation performance. The cooling blades are aligned with the control board, effectively reducing the control board temperature. The enlarged state at point C shows the core fastening groove in the fastening ring against the core. During actual installation, the core cannot be inserted into the core. The core can be tightened downward to ensure a certain degree of core stability. The rotor bracket assembly consists of the end cover fastening ring, the upper end cover fastening ring, the rotor upper end cover, the rotor bracket, the rotor lower end cover, the lower end cover fastening ring, the end cover fastening ring, and the fastening ring positioning screws.

[0071] The present invention also provides a motor, characterized in that it includes the above-mentioned rotor assembly.

[0072] See also Figures 20 to 30 As shown, when the rotor assembly is installed, the rotor shaft 27 passes through it. A bearing 25 is provided on the rotor shaft 27, and a retaining spring 26 is provided between the bearing 25 and the rotor shaft 27. The rotor assembly is sleeved within the stator. The stator includes a wire outlet 31, a pin 28, a third bracket 29, a first mounting position 30, a wire outlet 31, a tenth retaining slot 32, a second mounting position 33, a power cord 34, a pin hole 35, a control board 36, a mounting post 37, and a bearing chamber 38. The motor rotor is composed of the bearing 25, retaining spring 26, rotor, and rotor shaft 27. The overmolded stator structure in the motor includes a control board 36 pin 28 and a bracket for securing the control board 36; a first mounting position 30, a second mounting position 33, a wire outlet 31, a pin hole 35, and a power cord 34. Place the rotor bearing into the second mounting position 33 of the overmolded stator. Install the control board 36 and align the pin holes 35 on the control board 36 with the pins 28 in the overmolded stator. The heat dissipation blades on the rotor's upper end cap fastening ring should be slightly lower than the control board 36 to enhance heat dissipation. The other bearing 25 of the rotor assembly should now be inserted into the second mounting position 33, completing the motor's overall installation.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A rotor assembly, characterized in that: include: An inner iron core (201), wherein the inner iron core (201) can be sleeved on the rotor shaft (27); An outer iron core (202), along the circumference of the inner iron core (201), a plurality of the outer iron cores (202) are arranged on the outer peripheral wall of the inner iron core (201), a first bracket (4) is arranged between two adjacent outer iron cores (202), a magnetic steel (1) is detachably arranged in the first bracket (4), and the inner iron core (201) and the outer iron core (202) form a rotor iron core (2); The first bracket (4) comprises a fixing member (5) and a main body, the fixing member (5) being arranged on the inner iron core (201), the main body being arranged on the fixing member (5), the main body being provided with a third card slot (10), the third card slot (10) penetrating the main body along the axial direction of the inner iron core (201), the magnetic steel (1) being able to be clamped in the third card slot (10), a first card slot (6) being formed between two adjacent main bodies, and the outer iron core (202) being located in the first card slot (6); Both ends of the rotor core (2) are provided with rotor end covers, and a first clamping member (7) is provided on the end surface of the main body facing away from the inner core (201), and along the axial direction of the inner core (201), the first clamping member (7) at least partially extends out of the main body and can be clamped to the rotor end cover; A fixing plate is provided on the first clamp (7), and both sides of the fixing plate can extend outside the first clamp (7) and form a gap with the main body. Along the circumference of the rotor core (2), both sides of the outer core (202) have circumferential extensions, and the circumferential extensions are located on the end surface of the outer core (202) relative to the inner core (201) and close to the outer core (202) and facing away from the inner core (201), and the circumferential extensions can be stuck in the gap; in the cross section of the inner core (201), the width of one end of the outer core (202) facing the inner core (201) is smaller than the width of one end of the outer core (202) facing away from the inner core (201); In a transverse cross section of the rotor core (2), the side of the outer core (202) facing away from the inner core (201) is T-shaped.

2. The rotor assembly according to claim 1, wherein: The inner iron core (201) comprises a first section and a second section. The outer iron core (202) is provided on the outer peripheral wall of the first section and the outer peripheral wall of the second section along the circumference of the inner iron core (201). The first bracket (4) is provided between two adjacent outer iron cores (202) on the first section. The second bracket (9) is provided between two adjacent outer iron cores (202) on the second section. The second bracket (9) has the same structure as the first bracket (4). With the cross section of the inner iron core (201) as a projection surface, within the projection surface, a first connecting line is provided between the center point of the second bracket (9) and the center of the inner iron core (201). A second connecting line is provided between the center point of the first bracket (4) and the center of the inner iron core (201). An angle α is formed between the first connecting line and the second connecting line.

3. The rotor assembly according to claim 1, wherein: Along the axial direction of the rotor core (2), the fixing member (5) at least partially extends out of the rotor core (2), and the portion of the fixing member (5) extending out of the rotor core (2) can be connected to the rotor end cover, the fixing member (5) has a groove on a side facing the inner core (201), and along the axial direction of the inner core (201), a protrusion is provided on the inner core (201), the protrusion corresponds to the groove, and the protrusion is plugged into the groove.

4. The rotor assembly according to claim 1, wherein: The rotor end cover includes a cover body (15), the cross section of the cover body (15) is annular, and a plurality of seventh clamping grooves (19) are provided on the outer peripheral wall of the cover body (15) along the circumference of the cover body (15), and the first clamping member (7) can be clamped to the cover body (15) through the seventh clamping grooves (19). Along the axial direction of the rotor core (2), the height of the fixing plate is not greater than the height of the main body, and a second clamping groove (8) is provided between the fixing plate and the first clamping member (7). A fastening ring (17) is provided on the rotor core (2), and the fixing ring (17) is clamped in the second clamping groove (8). The fastening ring (17) is connected to the outer peripheral wall of the cover body (15) by a thread.

5. The rotor assembly according to claim 4, characterized in that: The cover body (15) is provided with a plurality of fifth slots (12) on the end surface facing the rotor core. The fifth slots (12) are arranged along the axial direction of the cover body (15), and the fifth slots (12) correspond one-to-one to the magnetic steels (1).

6. The rotor assembly according to claim 4, wherein: Along the axial direction of the rotor core (2), the rotor core (2) has a plurality of heat dissipation structures, the cover (15) is provided with a plurality of heat dissipation holes (18), and at least some of the heat dissipation holes (18) of the cover (15) correspond one-to-one to the heat dissipation structures of the rotor core (2).

7. The rotor assembly according to claim 4, wherein: The end surface of the cover body (15) facing the rotor core (2) matches the rotor core (2), and a retaining ring is provided on the inner peripheral wall of the cover body (15), and the retaining ring can abut against the inner core (201).

8. The rotor assembly according to claim 4, wherein: A fastening ring (24) is provided at both ends of the rotor core (2), and the fastening ring (24) is connected to the inner peripheral wall of the cover body (15). Along the circumference of the cover body (15), a plurality of fastening plates (16) are provided on the inner peripheral wall of the cover body (15), and a plurality of second clamping members (21) are provided on the outer peripheral wall of the fastening ring (24), and the second clamping members (21) correspond one-to-one to the fastening plates (16).

9. The rotor assembly according to claim 8, characterized in that: An eighth clamping groove (20) is provided on the side wall of the fastening ring (24) facing the rotor core (2). The eighth clamping groove (20) is annular and is located on the fastening ring (24) near the inner peripheral wall relative to the outer peripheral wall. The eighth clamping groove (20) matches the inner core (201).

10. The rotor assembly according to claim 8, wherein: Along the circumference of the fastening ring (24), a plurality of ninth slots (22) are provided on a side wall of the fastening ring (24) at one end of the rotor core (2) facing away from the rotor core (2).

11. The rotor assembly according to claim 8, wherein: A mounting plate is provided on the outer peripheral wall of the fastening ring (24) at the other end of the rotor core (2), and a plurality of blades (23) are provided on the mounting plate along the circumference of the fastening ring (24), wherein at least a portion of the blades (23) are located outside the mounting plate, and the blades (23) are located outside the cover body (15).

12. A motor, characterized in that: A rotor assembly comprising any one of claims 1-11.

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