Rotor core, rotor, motor, chassis system and vehicle

Abstract

The utility model provides a rotor core, a rotor, a motor, a chassis system and a vehicle. Wherein the rotor iron core comprises a plurality of iron core sections, the plurality of iron core sections are superposed, and in at least one part of the iron core sections, any two adjacent iron core sections are arranged in a staggered manner in the circumferential direction of the rotor iron core; the iron core section comprises a plurality of stacked rotor punching sheets, the iron core section is provided with mounting holes and mounting grooves, and the mounting holes and the mounting grooves penetrate through the plurality of rotor punching sheets along the axial direction of the rotor iron core; the mounting holes of the plurality of iron core sections are communicated to form a shaft hole, and the mounting grooves of the plurality of iron core sections are communicated to form a magnet groove; the iron core segments are further provided with connecting structures, the connecting structures are closer to the mounting holes than the mounting grooves, and any two adjacent rotor punching sheets are detachably connected through the connecting structures. The outer peripheral wall of the iron core segment is provided with a fixing structure, and the fixing structure is used for connecting a part of the rotor punching sheets in the plurality of rotor punching sheets. According to the invention, the structure of the rotor core is reasonably arranged, the gaps among the plurality of rotor punching sheets can be ensured when the motor operates, the plurality of rotor punching sheets can be effectively prevented from loosening, the vibration noise during the operation of the motor is reduced, the deterioration of the performance of the motor can be effectively inhibited, and the use performance and market competitiveness of the product are improved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a rotor core, a rotor, a motor, a chassis system, and a vehicle. Background Art

[0002] The rotor includes a rotor core and a rotating shaft. The rotor core includes a plurality of stacked rotor sheets.

[0003] The shaft and the rotor core have an interference fit. The radial force generated by this interference fit can overcome the binding force between the rotor laminations, causing them to deform and creating gaps between adjacent laminations. This can easily lead to multiple rotor laminations becoming loose, increasing the motor's vibration and noise, and causing abnormal noise. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present application provides a rotor core.

[0006] A second aspect of the present application provides a rotor.

[0007] A third aspect of the present application provides a motor.

[0008] A fourth aspect of the present application provides a chassis system.

[0009] A fifth aspect of the present application provides a vehicle.

[0010] In view of this, the first aspect of the present application provides a rotor core, comprising: multiple core segments, the multiple core segments are stacked, and in at least a part of the core segments, any two adjacent core segments are staggered in the circumferential direction of the rotor core; the core segment comprises multiple stacked rotor punchings, the core segment is provided with mounting holes and mounting slots, and the mounting holes and mounting slots both penetrate the multiple rotor punchings along the axial direction of the rotor core; the mounting holes of the multiple core segments are penetrated to form axial holes, and the mounting slots of the multiple core segments are penetrated to form magnet slots; the core segment is also provided with a connecting structure, the connecting structure is closer to the mounting hole than the mounting slot, and any two adjacent rotor punchings can be detachably connected through the connecting structure; the outer peripheral wall of the core segment is provided with a fixing structure, and the fixing structure is used to connect a part of the multiple rotor punchings.

[0011] The present application provides a rotor core comprising a plurality of core segments stacked together, wherein each core segment comprises a plurality of rotor punchings stacked together along the axial direction of the rotor core.

[0012] The core segment is further provided with a connecting structure, which is closer to the mounting hole than the mounting slot, that is, the distance from the connecting structure to the mounting hole is smaller than the distance from the mounting slot to the mounting hole.

[0013] Any two adjacent rotor punchings among the multiple rotor punchings can be detachably connected via a connecting structure. Furthermore, in each core segment, the outer peripheral wall of the core segment is provided with a fixing structure, which is used to connect a portion of the multiple rotor punchings. In other words, the fixing structure fixedly connects the outer edges of a portion of the rotor punchings in each core segment. In other words, the connecting structure and the fixing structure cooperate to connect and fix the multiple rotor punchings from multiple directions and multiple positions, thereby enhancing the structural rigidity of the assembly of the multiple rotor punchings and preventing the radial force generated by the interference fit between the rotating shaft and the shaft hole from destroying the bonding force between the multiple rotor punchings, thereby facilitating improved stability and reliability of the connection of the multiple rotor punchings in the core segment.

[0014] In this way, the gap between multiple rotor punchings can be guaranteed when the motor is running, which can effectively prevent the occurrence of multiple rotor punchings loosening, reduce the vibration noise when the motor is running, effectively inhibit the deterioration of motor performance, and improve the product's performance and market competitiveness.

[0015] It can be understood that the fixed structure is connected to a part of the rotor punchings in the core segment. The fixed structure cooperates with the connecting structure, which can not only ensure the structural strength of the assembly of multiple rotor punchings, but also reduce the material consumption of the fixed structure and reduce the processing difficulty of the rotor core.

[0016] Specifically, there are multiple core segments, which are stacked. Furthermore, in at least some of the multiple core segments, any two adjacent core segments are staggered in the circumferential direction of the rotor core. That is, in at least some of the core segments, any two adjacent core segments are staggered in the circumferential direction of the rotor core to form rotor skew poles. This segmented, modular design of the rotor core facilitates installation and maintenance, and skew poles can be formed between the multiple core segments.

[0017] The tooth harmonics of a motor are the primary source of its vibration and noise. Therefore, staggering any two adjacent core segments in the circumferential direction of the rotor core, in at least a portion of the multiple core segments, can reduce cogging torque and torque pulsation, thereby lowering electromagnetic vibration. In other words, by dividing the rotor core into multiple core segments and staggering any two adjacent core segments in the circumferential direction of the rotor core, in at least a portion of the multiple core segments, the specific harmonic content in the motor can be effectively suppressed, improving the motor's torque pulsation and cogging torque, and thereby reducing the motor's vibration and noise.

[0018] The mounting holes of the multiple core segments are connected to form an axial hole, which is used to assemble a rotating shaft, and the rotating shaft is installed in the axial hole. The mounting slots of the multiple core segments are connected to form a magnet slot, which is used to assemble the permanent magnets of the rotor. Specifically, the magnet slot is provided with a permanent magnet.

[0019] Optionally, the fixing structures of any two adjacent core segments among the multiple core segments are staggered in the circumferential direction of the rotor core. Alternatively, the fixing structures of any two adjacent core segments among a portion of the multiple core segments are staggered in the circumferential direction of the rotor core. This arrangement effectively prevents the multiple rotor punchings from loosening while also enabling periodic variation in the stator-rotor gap, resulting in a more uniform magnetic field distribution, which is beneficial for improving the performance and market competitiveness of the motor.

[0020] The rotor core described above in this application may also have the following additional technical features:

[0021] In some embodiments, optionally, the fixing structure includes: a first fixing portion, one end of the first fixing portion is adjacent to an axial end portion of one side of the core segment, and at least a portion of the first fixing portion extends along the axial direction of the rotor core.

[0022] In this embodiment, a fixing structure is further defined, and the fixing structure includes a first fixing portion.

[0023] One end of the first fixing portion is adjacent to one axial end of the core segment, and at least a portion of the first fixing portion extends axially along the rotor core. This arrangement helps reduce the difficulty of machining the first fixing portion and also reduces the material input for the first fixing portion.

[0024] Among them, the rotor punchings located at the axial end of the core segment are more likely to become loose than the rotor punchings located in the middle of the core segment. Therefore, making one end of the first fixing part close to the axial end of one side of the core segment and making at least a part of the first fixing part extend along the axial direction of the rotor core can effectively avoid the loosening of multiple rotor punchings of the core segment, and can also reduce the material input of the fixing structure, which is beneficial to improving the production efficiency of the product and reducing the production cost of the product.

[0025] In some embodiments, optionally, the fixing structure further includes: a second fixing portion, one end of the second fixing portion is adjacent to the other axial end of the core segment, at least a portion of the second fixing portion extends axially along the rotor core, and the second fixing portion and the first fixing portion are arranged at intervals.

[0026] In this embodiment, a fixing structure is further defined.

[0027] The fixing structure also includes a second fixing portion, one end of which is adjacent to the other axial end of the core segment, and at least a portion of which extends axially along the rotor core. This arrangement helps reduce the difficulty of machining the second fixing portion and reduces the material input for the second fixing portion.

[0028] The second fixing portion and the first fixing portion are arranged at intervals, that is, the fixing structure is connected to a portion of the rotor punchings in the plurality of rotor punchings to fix the core segment.

[0029] The rotor laminations located at the axial ends of the core segments are more likely to become loose than those located in the middle of the core segments. Therefore, one end of the first fixing portion is positioned adjacent to one axial end of the core segment, with at least a portion of the first fixing portion extending axially along the rotor core. Furthermore, one end of the second fixing portion is positioned adjacent to the other axial end of the core segment, with at least a portion of the second fixing portion extending axially along the rotor core. The combination of the first and second fixing portions can effectively prevent the multiple rotor laminations in the core segments from becoming loose, reduce the material input into the fixing structure, and improve product production efficiency and reduce product production costs.

[0030] In some embodiments, optionally, the core segment includes m rotor punchings, and the number of rotor punchings connected to the first fixing portion is n, wherein 2≤n<m / 2.

[0031] In this embodiment, the number of rotor laminations connected to the first fixing portion is further limited.

[0032] The core segment includes m rotor punchings, the number of rotor punchings connected to the first fixing portion is n, and m and n satisfy 2≤n<m / 2.

[0033] Optionally, the number of rotor punchings connected to the second fixing portion is n, wherein 2≤n<m / 2.

[0034] In some embodiments, optionally, there are multiple fixing structures, and the multiple fixing structures are arranged at intervals along the circumference of the rotor core.

[0035] In this embodiment, the number and distribution positions of the fixed structures are further determined.

[0036] There are multiple fixing structures, and the multiple fixing structures are arranged at intervals along the circumference of the rotor core.

[0037] This arrangement increases the contact area and contact angle between the fixed structure and the multiple rotor punchings, and can ensure the effectiveness and feasibility of the fixed structure connecting the multiple rotor punchings.

[0038] In addition, this arrangement can reduce the material input of the fixed structure, and while ensuring the structural rigidity of the rotor core, it is beneficial to reduce the processing difficulty of the product and to reduce the production cost of the product.

[0039] It can be understood that any one of the plurality of fixing structures is used to connect a portion of the plurality of rotor punchings.

[0040] Optionally, there are multiple connecting structures, which are spaced apart around the axis of the mounting hole. This arrangement increases the contact area and contact angle between the connecting structure and the multiple rotor punchings, ensuring the effectiveness and feasibility of the detachable connection of the multiple rotor punchings via the connecting structure.

[0041] In some embodiments, optionally, the fixing structure includes a welding fixing portion and / or an adhesive fixing portion.

[0042] In this embodiment, the type of the fixing structure is further defined such that the fixing structure includes a welding fixing portion and / or an adhesive fixing portion.

[0043] The fixing structure includes a welding fixing portion, or the fixing structure includes an adhesive fixing portion, or the fixing structure includes a welding fixing portion and an adhesive fixing portion.

[0044] When the fixing structure includes the welding fixing portion, that is, a portion of the plurality of rotor plates are connected by welding using solder.

[0045] When the fixing structure includes the adhesive fixing portion, that is, a portion of the plurality of rotor punchings is connected by adhesive using an adhesive.

[0046] When the fixing structure includes a welding fixing portion and an adhesive fixing portion, that is, a portion of the plurality of rotor punchings is connected and fixed by both welding and adhesive methods.

[0047] In some embodiments, optionally, along the circumference of the rotor core, the outer peripheral wall of the core segment includes a plurality of protruding walls and a plurality of recessed walls, the plurality of protruding walls and the plurality of recessed walls are arranged alternately, and the protruding walls are provided with a fixing structure.

[0048] In this embodiment, the structure of the rotor core is further defined.

[0049] Along the circumference of the rotor core, the outer peripheral wall of the core segment includes multiple raised walls and multiple recessed walls. The multiple raised walls and the multiple recessed walls are arranged in a staggered manner, that is, a recessed wall is provided between any two adjacent raised walls. Alternatively, a raised wall is provided between any two adjacent recessed walls.

[0050] Specifically, the raised wall is provided with a fixing structure, which is convenient for processing and can ensure the reliability and stability of the connection between the fixing structure and the plurality of rotor punchings.

[0051] In some embodiments, optionally, the connecting structure includes a protrusion and a groove, the first side axial end surface of the rotor punching is provided with a groove, and the second side axial end surface of the rotor punching is provided with a protrusion; in two adjacent rotor punchings, the protrusion of one rotor punching is interference fit with the groove of the other rotor punching.

[0052] In this embodiment, the connection structure is further defined.

[0053] Wherein, the connection structure includes a protrusion and a groove.

[0054] Each rotor punching has a groove on its first axial end surface, and a convex portion on its second axial end surface. That is, along the axial direction of the rotor core, the rotor punching has a first end surface and a second end surface that are opposite each other, with the groove on the first end surface and the convex portion on the second end surface.

[0055] When two adjacent rotor punchings are assembled, the convex portion is inserted into the groove, and the convex portion and the groove are interference fit to achieve the purpose of assembling the two rotor punchings.

[0056] The convex portion and the groove cooperate to increase the contact area and contact angle of two adjacent rotor punchings, which is beneficial to improving the stability and reliability of the axial assembly of the two adjacent rotor punchings on the rotor core, preventing the rotor punchings from falling apart, and ensuring the structural rigidity of the rotor assembly.

[0057] In some embodiments, optionally, a portion of the rotor punching is recessed to form a protrusion and a groove.

[0058] In this embodiment, a portion of the rotor punching is recessed to form a convex portion and a concave portion. Alternatively, the concave portion and convex portion are integrally stamped into the rotor punching. This arrangement simplifies the rotor core forming process by eliminating the need to assemble the convex portion and concave portion, thereby improving product processing efficiency. Furthermore, integrally stamping the convex portion and concave portion into the rotor punching ensures product dimensional accuracy.

[0059] In some embodiments, optionally, a portion of the core segment between the mounting slot and the mounting hole is further provided with a weight-reducing hole, and the weight-reducing hole penetrates the plurality of rotor punchings along the axial direction of the rotor core.

[0060] In this embodiment, the structure of the rotor core is further defined so that a portion of the core segment between the mounting groove and the mounting hole is further provided with a weight-reducing hole, wherein the weight-reducing hole penetrates the plurality of rotor punchings along the axial direction of the rotor core.

[0061] This setting reasonably limits the position of the weight-reducing holes, and can reduce the moment of inertia and the overall weight of the motor while ensuring that the motor performance is not affected.

[0062] In addition, the weight-reducing hole is located between the mounting groove and the mounting hole, which provides sufficient layout space for the weight-reducing hole and can ensure the structural strength of the rotor core.

[0063] If the lightening hole is located between the mounting groove and the outer peripheral wall of the core segment, the structural strength of the outer peripheral wall of the core segment will be weakened, which will easily increase the deformation of the rotor punching and affect the performance of the motor.

[0064] The second aspect of the present invention provides a rotor, comprising: a rotating shaft; a plurality of permanent magnets; and a rotor core as in the first aspect, wherein the rotating shaft is interference fit with the shaft hole of the rotor core, and permanent magnets are arranged in the magnet slots of the rotor core.

[0065] The rotor provided by the present invention includes the rotor core as described in the first aspect, and therefore has all the beneficial effects of the above-mentioned rotor core, which will not be described one by one here.

[0066] In some embodiments, optionally, the axial length of the permanent magnet is smaller than the axial length of the magnet slot, and a gap is provided between the outer peripheral wall of the permanent magnet and the slot wall of the magnet slot.

[0067] In this embodiment, the matching structure of the permanent magnet and the magnet slot is further defined.

[0068] The axial length of the permanent magnet is shorter than the axial length of the magnet slot. That is, along the axial direction of the rotor core, the length of the permanent magnet is shorter than the length of the magnet slot. This allows the permanent magnet to be fully accommodated within the magnet slot, thus reducing the probability of permanent magnet damage caused by squeezing.

[0069] If the axial length of the permanent magnet is greater than or equal to the axial length of the magnet slot, part of the permanent magnet may easily protrude from the rotor core. This arrangement may easily cause the permanent magnet to be squeezed and damaged, and the performance of the motor cannot be guaranteed.

[0070] There is a gap between the outer peripheral wall of the permanent magnet and the slot wall of the magnet slot. For example, in the radial direction of the rotor core, there is a gap between the outer peripheral wall of the permanent magnet and the slot wall of the magnet slot. For example, in the tangential direction of the rotor core, there is a gap between the outer peripheral wall of the permanent magnet and the slot wall of the magnet slot.

[0071] A third aspect of the present invention provides a motor, comprising: a rotor as in the second aspect.

[0072] The motor provided by the present invention includes the rotor as described in the second aspect, and therefore has all the beneficial effects of the above-mentioned rotor, which will not be described one by one here.

[0073] A fourth aspect of the present invention provides a chassis system, comprising: the motor as in the third aspect.

[0074] The chassis system provided by the present invention includes the motor as described in the third aspect, and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0075] Optionally, the chassis system includes a transmission system, a driving system, a steering system (e.g., an electric power steering system), and a braking system. The chassis system supports and mounts the vehicle's engine and its components, forming the vehicle's overall shape. It also receives power from the engine, enabling the vehicle to move and maintain normal operation.

[0076] A fifth aspect of the present invention provides a vehicle, comprising: the motor as in the third aspect; or the chassis system as in the fourth aspect.

[0077] The vehicle provided by the present invention includes the motor as in the third aspect, or includes the chassis system as in the fourth aspect, and therefore has all the beneficial effects of the above-mentioned motor or chassis system, which will not be described one by one here.

[0078] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0080] Figure 1 A partial structural schematic diagram of a core segment according to an embodiment of the present application is shown;

[0081] Figure 2 A schematic structural diagram of a core segment from a first perspective of an embodiment of the present application is shown;

[0082] Figure 3 A schematic structural diagram of a core segment from a second perspective of an embodiment of the present application is shown;

[0083] Figure 4 A partial structural schematic diagram of a rotor according to an embodiment of the present application is shown.

[0084] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0085] 1 rotor, 10 rotor core, 100 core segment, 110 rotor punching, 120 mounting hole, 130 mounting groove, 140 connection structure, 142 protrusion, 144 groove, 150 fixing structure, 152 first fixing part, 154 second fixing part, 160 raised wall, 170 recessed wall, 180 weight reduction hole, 190 shaft hole, 200 magnet slot, 20 rotating shaft, 30 permanent magnet. DETAILED DESCRIPTION

[0086] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0087] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0088] Refer to the following Figures 1 to 4 A rotor core 10 , a rotor 1 , a motor, a chassis system, and a vehicle according to some embodiments of the present application.

[0089] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, according to some embodiments of the present application, a rotor core 10 includes a plurality of core segments 100, the plurality of core segments 100 are stacked, and in at least a portion of the core segments 100, any two adjacent core segments 100 are staggered in the circumferential direction of the rotor core 10; the core segment 100 includes a plurality of stacked rotor punchings 110, the core segment 100 is provided with mounting holes 120 and mounting slots 130, and the mounting holes 120 and the mounting slots 130 both penetrate the plurality of rotor punchings 110 along the axial direction of the rotor core 10; the plurality of core segments 100 are stacked, and the plurality of rotor punchings 110 are staggered in the circumferential ... 00's mounting hole 120 is penetrated to form an axial hole 190, and the mounting grooves 130 of multiple core segments 100 are penetrated to form a magnet slot 200; the core segment 100 is also provided with a connecting structure 140, which is closer to the mounting hole 120 than the mounting groove 130, and any two adjacent rotor punchings 110 can be detachably connected through the connecting structure 140; the outer peripheral wall of the core segment 100 is provided with a fixing structure 150, which is used to connect a part of the multiple rotor punchings 110.

[0090] The present application provides a rotor core 10 comprising a plurality of core segments 100 , which are stacked. Each core segment 100 comprises a plurality of rotor punchings 110 , which are stacked along the axial direction of the rotor core 10 .

[0091] The core segment 100 is further provided with a connecting structure 140 , which is closer to the mounting hole 120 than the mounting slot 130 , that is, the distance from the connecting structure 140 to the mounting hole 120 is smaller than the distance from the mounting slot 130 to the mounting hole 120 .

[0092] Any two adjacent rotor punchings 110 among the multiple rotor punchings 110 can be detachably connected via a connecting structure 140. Furthermore, in each core segment 100, a fixing structure 150 is provided on the outer peripheral wall of the core segment 100. The fixing structure 150 is used to connect a portion of the multiple rotor punchings 110. In other words, the fixing structure 150 securely connects the outer edges of a portion of the rotor punchings 110 in each core segment 100. In other words, the connecting structure 140 and the fixing structure 150 cooperate to connect and secure the multiple rotor punchings 110 from multiple directions and positions, thereby enhancing the structural rigidity of the assembly of the multiple rotor punchings 110 and preventing the radial force generated by the interference fit between the rotating shaft 20 and the shaft hole 190 from damaging the bonding force between the multiple rotor punchings 110. This facilitates improving the stability and reliability of the connection of the multiple rotor punchings 110 in the core segment 100.

[0093] In this way, the gap between the multiple rotor punchings 110 can be guaranteed when the motor is running, the loosening of the multiple rotor punchings 110 can be effectively prevented, the vibration noise during the operation of the motor can be reduced, the deterioration of the motor performance can be effectively suppressed, and the product performance and market competitiveness can be improved.

[0094] It can be understood that the fixing structure 150 is connected to a portion of the rotor punchings 110 in the core segment 100. The fixing structure 150 cooperates with the connecting structure 140, which can not only ensure the structural strength of the assembly of multiple rotor punchings 110, but also reduce the material usage of the fixing structure 150 and reduce the processing difficulty of the rotor core 10.

[0095] Specifically, there are multiple core segments 100, which are stacked. Furthermore, in at least some of the multiple core segments 100, any two adjacent core segments 100 are staggered in the circumferential direction of the rotor core 10. That is, in at least some of the core segments 100, any two adjacent core segments 100 are staggered in the circumferential direction of the rotor core 10 to form skewed poles for the rotor 1. This segmented, modular arrangement of the rotor core 10 facilitates installation and maintenance, and skewed poles can be formed between the multiple core segments 100.

[0096] The tooth harmonics of a motor are the primary source of its vibration and noise. Therefore, staggering any two adjacent core segments 100 in the circumferential direction of the rotor core 10, in at least a portion of the multiple core segments 100, can reduce cogging torque and torque ripple, thereby reducing electromagnetic vibration. In other words, by dividing the rotor core 100 into multiple core segments 100 and staggering any two adjacent core segments 100 in the circumferential direction of the rotor core 10, the specific harmonic content in the motor can be effectively suppressed, improving the motor's torque ripple and cogging torque, and thereby reducing the motor's vibration and noise.

[0097] The mounting holes 120 of the core segments 100 are connected to form an axial hole 190. The axial hole 190 is used to assemble the rotating shaft 20. The rotating shaft 20 is disposed through the axial hole 190. The mounting slots 130 of the core segments 100 are connected to form magnet slots 200. The magnet slots 200 are used to assemble the permanent magnets 30 of the rotor 1. Specifically, the permanent magnets 30 are disposed in the magnet slots 200.

[0098] In some embodiments, optionally, as Figure 1 and Figure 3 As shown, the fixing structure 150 includes a first fixing portion 152 .

[0099] One end of the first fixing portion 152 is adjacent to one axial end of the core segment 100 .

[0100] Furthermore, at least a portion of the first fixing portion 152 extends along the axial direction of the rotor core 10 .

[0101] In this embodiment, a fixing structure 150 is further defined and includes a first fixing portion 152 .

[0102] One end of the first fixing portion 152 is adjacent to one axial end of the core segment 100, and at least a portion of the first fixing portion 152 extends axially along the rotor core 10. This arrangement helps reduce the difficulty of machining the first fixing portion 152 and reduces the material input for the first fixing portion 152.

[0103] Among them, the rotor punchings 110 located at the axial end of the core segment 100 are more likely to become loose than the rotor punchings 110 located in the middle of the core segment 100. Therefore, making one end of the first fixing portion 152 close to the axial end of one side of the core segment 100 and making at least a portion of the first fixing portion 152 extend along the axial direction of the rotor core 10 can effectively prevent the multiple rotor punchings 110 of the core segment 100 from becoming loose, and can also reduce the material input of the fixing structure 150, which is beneficial to improving the production efficiency of the product and reducing the production cost of the product.

[0104] Optionally, one end of the first fixing portion 152 is connected to one axial end portion of the core segment 100 .

[0105] Optionally, one end of the first fixing portion 152 is spaced apart from an axial end portion of the core segment 100 .

[0106] Optionally, the first fixing portion 152 is in a bar shape.

[0107] Optionally, the first fixing portion 152 is in a curved shape, such as an "S" shape or an "L" shape.

[0108] In some embodiments, optionally, as Figure 1 and Figure 3 As shown, the fixing structure 150 further includes a second fixing portion 154 .

[0109] One end of the second fixing portion 154 is adjacent to the other axial end of the core segment 100 .

[0110] At least a portion of the second fixing portion 154 extends in the axial direction of the rotor core 10 .

[0111] The second fixing portion 154 and the first fixing portion 152 are spaced apart from each other.

[0112] In this embodiment, a fixing structure 150 is further defined.

[0113] The fixing structure 150 also includes a second fixing portion 154. One end of the second fixing portion 154 is adjacent to the other axial end of the core segment 100. At least a portion of the second fixing portion 154 extends axially along the rotor core 10. This arrangement helps reduce the difficulty of machining the second fixing portion 154 and reduces the material input for the second fixing portion 154.

[0114] The second fixing portion 154 and the first fixing portion 152 are arranged at intervals. That is, the fixing structure 150 is connected to a portion of the rotor punchings 110 to fix the core segment 100 .

[0115] Optionally, along the axial direction of the rotor core 10 , the second fixing portion 154 and the first fixing portion 152 are spaced apart.

[0116] Optionally, along the circumferential direction of the rotor core 10 , the second fixing portion 154 and the first fixing portion 152 are arranged at intervals.

[0117] The rotor laminations 110 located at the axial ends of the core segment 100 are more likely to become loose than the rotor laminations 110 located in the middle of the core segment 100. Therefore, one end of the first fixing portion 152 is positioned adjacent to one axial end of the core segment 100, with at least a portion of the first fixing portion 152 extending axially along the rotor core 10, and one end of the second fixing portion 154 is positioned adjacent to the other axial end of the core segment 100, with at least a portion of the second fixing portion 154 extending axially along the rotor core 10. The combination of the first fixing portion 152 and the second fixing portion 154 can effectively prevent the multiple rotor laminations 110 of the core segment 100 from becoming loose, and can also reduce the material input of the fixing structure 150, thereby improving the production efficiency and reducing the production cost of the product.

[0118] Optionally, the second fixing portion 154 is in a bar shape.

[0119] Optionally, the second fixing portion 154 is in a curved shape, such as an "S" shape or an "L" shape.

[0120] Optionally, one end of the second fixing portion 154 is connected to the other axial end of the core segment 100 .

[0121] Optionally, one end of the second fixing portion 154 is spaced apart from the other axial end of the core segment 100 .

[0122] In some embodiments, the core segment 100 optionally includes m rotor sheets 110 .

[0123] The number of rotor laminations 110 connected to the first fixing portion 152 is n.

[0124] Among them, 2≤n<m / 2.

[0125] In this embodiment, the number of rotor sheets 110 connected to the first fixing portion 152 is further limited.

[0126] The core segment 100 includes m rotor punchings 110 , and the number of rotor punchings 110 connected to the first fixing portion 152 is n, where m and n satisfy 2≤n<m / 2.

[0127] Optionally, the number of rotor punchings 110 connected to the second fixing portion 154 is n, where 2≤n<m / 2.

[0128] In some embodiments, optionally, as Figure 1 As shown, there are multiple fixing structures 150 .

[0129] A plurality of fixing structures 150 are arranged at intervals along the circumference of the rotor core 10 .

[0130] In this embodiment, the number and distribution positions of the fixing structures 150 are further considered.

[0131] There are multiple fixing structures 150 , and the multiple fixing structures 150 are arranged at intervals along the circumference of the rotor core 10 .

[0132] This arrangement increases the contact area and contact angle between the fixing structure 150 and the plurality of rotor punchings 110 , and can ensure the effectiveness and feasibility of the fixing structure 150 connecting the plurality of rotor punchings 110 .

[0133] In addition, this arrangement can reduce the material input of the fixing structure 150 , thereby ensuring the structural rigidity of the rotor core 10 , and at the same time, helps to reduce the processing difficulty of the product and helps to reduce the production cost of the product.

[0134] It can be understood that any one of the plurality of fixing structures 150 is used to connect a portion of the rotor punchings 110 among the plurality of rotor punchings 110 .

[0135] Optionally, there are multiple connecting structures 140, which are spaced apart around the axis of the mounting hole 120. This arrangement increases the contact area and contact angle between the connecting structure 140 and the multiple rotor punchings 110, thereby ensuring the effectiveness and feasibility of the detachable connection of the multiple rotor punchings 110 via the connecting structure 140.

[0136] In some embodiments, optionally, the fixing structure 150 includes a welding fixing portion and / or an adhesive fixing portion.

[0137] In this embodiment, the type of the fixing structure 150 is further limited, such that the fixing structure 150 includes a welding fixing portion and / or an adhesive fixing portion.

[0138] The fixing structure 150 includes a welding fixing portion, or includes an adhesive fixing portion, or includes a welding fixing portion and an adhesive fixing portion.

[0139] When the fixing structure 150 includes a welding fixing portion, that is, a portion of the rotor punchings 110 among the plurality of rotor punchings 110 is connected by welding using solder.

[0140] When the fixing structure 150 includes an adhesive fixing portion, that is, an adhesive is used to connect a portion of the rotor sheets 110 among the plurality of rotor sheets 110 by adhesive.

[0141] When the fixing structure 150 includes a welding fixing portion and an adhesive fixing portion, that is, a portion of the rotor punchings 110 among the plurality of rotor punchings 110 is connected and fixed by both welding and adhesive bonding.

[0142] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, along the circumference of the rotor core 10 , the outer peripheral wall of the core segment 100 includes a plurality of protruding walls 160 and a plurality of recessed walls 170 .

[0143] The plurality of raised walls 160 and the plurality of recessed walls 170 are arranged alternately.

[0144] The raised wall 160 is provided with a fixing structure 150 .

[0145] In this embodiment, the structure of the rotor core 10 is further defined.

[0146] Along the circumference of the rotor core 10, the outer peripheral wall of the core segment 100 includes a plurality of raised walls 160 and a plurality of recessed walls 170. The raised walls 160 and the recessed walls 170 are arranged in a staggered manner, that is, a recessed wall 170 is provided between any two adjacent raised walls 160. Alternatively, a raised wall 160 is provided between any two adjacent recessed walls 170.

[0147] Specifically, the protruding wall 160 is provided with a fixing structure 150 , which is convenient for processing and can ensure the reliability and stability of the connection between the fixing structure 150 and the plurality of rotor punchings 110 .

[0148] In some other embodiments, the recessed wall 170 is provided with a fixing structure 150 .

[0149] In some other embodiments, both the protruding wall 160 and the recessed wall 170 are provided with a fixing structure 150 .

[0150] In some embodiments, optionally, as Figure 1 As shown, the connection structure 140 includes a protrusion 142 and a groove 144 .

[0151] A groove 144 is formed on the first axial end surface of the rotor punch 110 .

[0152] A convex portion 142 is formed on the second axial end surface of the rotor punching 110 .

[0153] In two adjacent rotor punchings 110 , the protrusion 142 of one rotor punching 110 is interference fit with the groove 144 of the other rotor punching 110 .

[0154] In this embodiment, a connecting structure 140 is further defined.

[0155] The connection structure 140 includes a protrusion 142 and a groove 144 .

[0156] A groove 144 is formed on the first axial end surface of each rotor punching 110, and a protrusion 142 is formed on the second axial end surface of each rotor punching 110. That is, along the axial direction of the rotor core 10, the rotor punching 110 has a first end surface and a second end surface that are oppositely disposed. The first end surface has the groove 144, and the second end surface has the protrusion 142.

[0157] When two adjacent rotor punchings 110 are assembled, the protrusion 142 is inserted into the groove 144 , and the protrusion 142 and the groove 144 are interference fit, so as to achieve the purpose of assembling the two rotor punchings 110 .

[0158] The protrusion 142 and the groove 144 cooperate to increase the contact area and contact angle of two adjacent rotor punchings 110, which is beneficial to improving the stability and reliability of the axial assembly of the two adjacent rotor punchings 110 on the rotor core 10, preventing the rotor punchings 110 from falling apart, and ensuring the structural rigidity of the rotor 1 assembly.

[0159] In some embodiments, optionally, a portion of the rotor punching 110 is recessed to form the protrusion 142 and the groove 144 .

[0160] In this embodiment, a portion of the rotor punching 110 is recessed to form a protrusion 142 and a groove 144. Alternatively, the groove 144 and the protrusion 142 are integrally stamped into the rotor punching 110. This configuration simplifies the rotor core 10 molding process by eliminating the need to assemble the protrusion 142 and groove 144, thereby improving product processing efficiency. Furthermore, integrally stamping the groove 144 and the protrusion 142 into the rotor punching 110 ensures product dimensional accuracy.

[0161] Optionally, the groove 144 is cross-sectioned in a direction perpendicular to the groove opening to the groove bottom. In the cross-section, the contour lines of the groove sidewalls of the groove 144 form a trapezoidal shape. The trapezoid has two oppositely disposed long and short bases, and also has two side edges. Each side edge is connected between the long base edge and the short base edge, and two adjacent side edges are disposed opposite each other. The length of both side edges is greater than that of the long base edge. This arrangement can enhance the bonding force between the groove 144 and the protrusion 142, ensure the structural rigidity of the two adjacent rotor punchings 110 after assembly, and reduce the possibility of the rotor punchings 110 falling apart.

[0162] Optionally, the groove 144 is cross-sectioned along a direction perpendicular to the groove opening to the groove bottom of the groove 144 . In the cross-section, the shape enclosed by the contour lines of the groove sidewalls of the groove 144 is a rectangle.

[0163] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, a weight-reducing hole 180 is further provided in the portion of the core segment 100 between the mounting groove 130 and the mounting hole 120 .

[0164] The lightening holes 180 penetrate the plurality of rotor sheets 110 along the axial direction of the rotor core 10 .

[0165] In this embodiment, the structure of the rotor core 10 is further defined so that a portion of the core segment 100 between the mounting groove 130 and the mounting hole 120 is further provided with a lightening hole 180 , wherein the lightening hole 180 passes through the plurality of rotor punchings 110 along the axial direction of the rotor core 10 .

[0166] This setting reasonably limits the position of the weight-reducing hole 180 , and can reduce the moment of inertia and the overall weight of the motor while ensuring that the performance of the motor is not affected.

[0167] In addition, the lightening hole 180 is located between the mounting groove 130 and the mounting hole 120 , which provides sufficient layout space for the lightening hole 180 and can ensure the structural strength of the rotor core 10 .

[0168] If the lightening hole 180 is located between the mounting groove 130 and the outer peripheral wall of the core segment 100 , the structural strength of the outer peripheral wall of the core segment 100 will be weakened, which will easily increase the deformation of the rotor punching 110 and affect the performance of the motor.

[0169] like Figure 4 As shown, according to some other embodiments of the present application, a rotor 1 is provided. The rotor 1 includes a rotating shaft 20, a plurality of permanent magnets 30, and a rotor core 10 according to any one of the above embodiments.

[0170] The rotating shaft 20 is interference fit with the shaft hole 190 .

[0171] Permanent magnets 30 are disposed in the magnet slots 200 of the rotor core 10 .

[0172] The present application provides a rotor 1 including a rotating shaft 20 , a plurality of permanent magnets 30 and a rotor core 10 .

[0173] The rotor core 10 includes a core segment 100 . The core segment 100 includes a plurality of rotor punchings 110 , which are stacked in the axial direction of the rotor core 10 .

[0174] The core segment 100 is provided with a mounting hole 120 and a mounting slot 130. The mounting hole 120 extends axially through the rotor core 10, and the mounting slot 130 extends axially through the rotor core 10, respectively. The mounting hole 120 is used to mount the rotating shaft 20; specifically, the rotating shaft 20 extends through the mounting hole 120. The mounting slot 130 is used to mount the permanent magnet 30 of the rotor 1; specifically, the permanent magnet 30 is disposed within the mounting slot 130.

[0175] The core segment 100 is further provided with a connecting structure 140 , which is closer to the mounting hole 120 than the mounting slot 130 , that is, the distance from the connecting structure 140 to the mounting hole 120 is smaller than the distance from the mounting slot 130 to the mounting hole 120 .

[0176] Any two adjacent rotor punchings 110 among the multiple rotor punchings 110 can be detachably connected via the connecting structure 140. In addition, the outer peripheral wall of the core segment 100 is provided with a fixing structure 150, which is used to connect a portion of the multiple rotor punchings 110. In other words, the fixing structure 150 fixes the outer edges of a portion of the rotor punchings 110 together. In other words, the connecting structure 140 and the fixing structure 150 cooperate to connect and fix the multiple rotor punchings 110 from multiple directions and multiple positions, so as to enhance the assembly structural rigidity of the multiple rotor punchings 110, avoid the radial force generated by the interference fit between the rotating shaft 20 and the shaft hole 190 from destroying the bonding force between the multiple rotor punchings 110, and help to improve the stability and reliability of the connection of the multiple rotor punchings 110 of the core segment 100.

[0177] In this way, the gap between the multiple rotor punchings 110 can be guaranteed when the motor is running, the loosening of the multiple rotor punchings 110 can be effectively prevented, the vibration noise during the operation of the motor can be reduced, the deterioration of the motor performance can be effectively suppressed, and the product performance and market competitiveness can be improved.

[0178] It can be understood that the fixing structure 150 is connected to a part of the multiple rotor punchings 110, and the fixing structure 150 cooperates with the connecting structure 140, which can not only ensure the structural strength of the assembly of multiple rotor punchings 110, but also reduce the material usage of the fixing structure 150 and reduce the processing difficulty of the rotor core 10.

[0179] In some embodiments, optionally, the axial length of the permanent magnet 30 is smaller than the axial length of the magnet slot 200 .

[0180] There is a gap between the outer peripheral wall of the permanent magnet 30 and the slot wall of the magnet slot 200 .

[0181] In this embodiment, the matching structure of the permanent magnet 30 and the magnet slot 200 is further defined.

[0182] The axial length of the permanent magnet 30 is shorter than the axial length of the magnet slot 200. That is, along the axial direction of the rotor core 10, the length of the permanent magnet 30 is shorter than the length of the magnet slot 200. In other words, the permanent magnet 30 can be completely accommodated in the magnet slot 200, thereby reducing the probability of squeezing the permanent magnet 30 and causing damage to the permanent magnet 30.

[0183] If the axial length of the permanent magnet 30 is greater than or equal to the axial length of the magnet slot 200, a portion of the permanent magnet 30 may easily protrude from the rotor core 10. This arrangement may easily cause the permanent magnet 30 to be squeezed and damaged, and the performance of the motor cannot be guaranteed.

[0184] There is a gap between the outer circumferential wall of the permanent magnet 30 and the slot wall of the magnet slot 200. For example, along the radial direction of the rotor core 10, there is a gap between the outer circumferential wall of the permanent magnet 30 and the slot wall of the magnet slot 200. For example, along the tangential direction of the rotor core 10, there is a gap between the outer circumferential wall of the permanent magnet 30 and the slot wall of the magnet slot 200.

[0185] According to some further embodiments of the present application, a motor includes: the rotor 1 as in the above embodiment.

[0186] The present application provides a motor including a rotor 1 .

[0187] The rotor 1 includes a rotation shaft 20 , a plurality of permanent magnets 30 , and a rotor core 10 .

[0188] The rotor core 10 includes a core segment 100 . The core segment 100 includes a plurality of rotor punchings 110 , which are stacked in the axial direction of the rotor core 10 .

[0189] The core segment 100 is provided with a mounting hole 120 and a mounting slot 130. The mounting hole 120 extends axially through the rotor core 10, and the mounting slot 130 extends axially through the rotor core 10, respectively. The mounting hole 120 is used to mount the rotating shaft 20; specifically, the rotating shaft 20 extends through the mounting hole 120. The mounting slot 130 is used to mount the permanent magnet 30 of the rotor 1; specifically, the permanent magnet 30 is disposed within the mounting slot 130.

[0190] The core segment 100 is further provided with a connecting structure 140 , which is closer to the mounting hole 120 than the mounting slot 130 , that is, the distance from the connecting structure 140 to the mounting hole 120 is smaller than the distance from the mounting slot 130 to the mounting hole 120 .

[0191] Any two adjacent rotor punchings 110 among the multiple rotor punchings 110 can be detachably connected via the connecting structure 140. In addition, the outer peripheral wall of the core segment 100 is provided with a fixing structure 150, which is used to connect a portion of the multiple rotor punchings 110. In other words, the fixing structure 150 fixes the outer edges of a portion of the rotor punchings 110 together. In other words, the connecting structure 140 and the fixing structure 150 cooperate to connect and fix the multiple rotor punchings 110 from multiple directions and multiple positions, so as to enhance the assembly structural rigidity of the multiple rotor punchings 110, avoid the radial force generated by the interference fit between the rotating shaft 20 and the shaft hole 190 from destroying the bonding force between the multiple rotor punchings 110, and help to improve the stability and reliability of the connection of the multiple rotor punchings 110 of the core segment 100.

[0192] In this way, the gap between the multiple rotor punchings 110 can be guaranteed when the motor is running, the loosening of the multiple rotor punchings 110 can be effectively prevented, the vibration noise during the operation of the motor can be reduced, the deterioration of the motor performance can be effectively suppressed, and the product performance and market competitiveness can be improved.

[0193] It can be understood that the fixing structure 150 is connected to a part of the multiple rotor punchings 110, and the fixing structure 150 cooperates with the connecting structure 140, which can not only ensure the structural strength of the assembly of multiple rotor punchings 110, but also reduce the material usage of the fixing structure 150 and reduce the processing difficulty of the rotor core 10.

[0194] According to some further embodiments of the present application, a chassis system includes: a motor as described in the above embodiments.

[0195] The chassis system provided in the present application includes the motor as described in the above embodiment, and therefore has all the beneficial effects of the above motor, which will not be described one by one here.

[0196] Optionally, the chassis system includes a transmission system, a driving system, a steering system (e.g., an electric power steering system), and a braking system. The chassis system supports and mounts the vehicle's engine and its components, forming the vehicle's overall shape. It also receives power from the engine, enabling the vehicle to move and maintain normal operation.

[0197] According to some further embodiments of the present application, a vehicle includes: a motor as in the above embodiments; or a chassis system as in the above embodiments.

[0198] The vehicle provided in the present application includes a motor as in the above embodiment, or includes a chassis system as in the above embodiment, and therefore has all the beneficial effects of the above motor or chassis system, which are not described one by one here.

[0199] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0200] Of course, vehicles are not limited to new energy vehicles. Vehicles also include gasoline vehicles, diesel vehicles, hybrid vehicles, etc., which are not listed here one by one.

[0201] Optionally, the rotor 1 includes a rotating shaft 20 , a plurality of permanent magnets 30 and a rotor core 10 .

[0202] The rotor core 10 is mounted on the rotating shaft 20 by interference fit. The permanent magnets 30 are embedded in the magnet slots 200 of the rotor core 10.

[0203] The rotor core 10 is formed by stacking a plurality of rotor punchings 110. A plurality of magnet slots 200 for accommodating permanent magnets 30 are provided near the outer peripheral wall of the rotor core 10. The two opposite axial end faces of the rotor punching 110 are respectively provided with a protrusion 142 and a groove 144. The groove 144 and the protrusion 142 of the adjacent rotor punching 110 form an interference fit to connect the two adjacent rotor punchings 110. Either the protrusion 142 or the groove 144 is closer to the shaft hole 190 relative to the magnet slot 200. The outer peripheral wall of the rotor core 10 has a plurality of fixing structures 150 near the axial end face. The fixing structure 150 is used to connect the plurality of rotor punchings 110 located at the end of the rotor core 10.

[0204] This application rationally arranges the structure of the rotor core 10 to ensure that the outer peripheral wall of the rotor core 10 is tightly connected and gap-free during installation and use of the motor. This prevents noise during motor operation and greatly avoids deterioration of motor performance.

[0205] Optionally, the rotor 1 includes at least two core segments 100 , and any two adjacent core segments 100 are staggered in the circumferential direction of the rotor core 10 .

[0206] m rotor punchings 110 are stacked to form the core segment 100. The core segment 100 is provided with a plurality of mounting slots 130 for accommodating the permanent magnets 30 near the outer peripheral wall. A connecting structure 140 (e.g., the connecting structure 140 is a crimping structure) is provided on the inner side of the mounting slot 130. The connecting structure 140 is closer to the mounting hole 120 than the mounting slot 130. A fixing structure 150 is provided on the outer peripheral wall of the core segment 100 near at least one axial end face of the core segment 100 to connect and fix the first n rotor punchings 110 near the end face, wherein 2≤n <m / 2。

[0207] The permanent magnets 30 are accommodated in the magnet slots 200 of the rotor core 10 .

[0208] The rotating shaft 20 is interference-connected to the rotor core 10 .

[0209] The outer peripheral wall of the core segment 100 includes a raised wall 160 and a recessed wall 170. The fixing structure 150 is located on the raised wall 160 and connects some of the rotor sheets 110 of the rotor core 10. There are multiple fixing structures 150, which are evenly spaced along the circumference of the rotor core 10.

[0210] The fixing structure 150 is formed by welding or gluing.

[0211] A convex portion 142 is provided on one axial end surface of the rotor punching 110 , and a groove 144 is provided on the other axial end surface of the rotor punching 110 . The groove 144 is in interference contact with the convex portion 142 of the adjacent rotor punching 110 .

[0212] In the axial direction of the rotor core 10, the length of the permanent magnet 30 is shorter than the length of the magnet slot 200. In the radial direction of the rotor core 10, there is a gap between the permanent magnet 30 and the slot wall of the magnet slot 200. In the tangential direction of the rotor core 10, there is a gap between the permanent magnet 30 and the slot wall of the magnet slot 200.

[0213] The permanent magnets 30 are fixed in the magnet slots 200 by adhesive.

[0214] The core segment 100 is provided with a lightening hole 180, which penetrates the plurality of rotor sheets 110 in the axial direction of the rotor core 10. The lightening hole 180 is closer to the shaft hole 190 than the magnet slots 200.

[0215] The present application reasonably arranges the structure of the rotor 1, improves the rigidity of the rotor 1, and can prevent the rotor punchings 110 of the rotor core 10 from becoming loose in the axial direction.

[0216] The rotor core 10 includes one or more core segments 100. Core segments 100 are formed by laminating multiple silicon steel rotor laminations 110. The rotor core 10 is provided with multiple magnet slots 200. These slots 200 are located near the outer circumferential wall of the rotor core 10 and are evenly spaced along the circumference of the shaft hole 190. These slots 200 accommodate permanent magnets 30.

[0217] The outer peripheral wall of the rotor core 10 includes a plurality of raised walls 160 and a plurality of recessed walls 170. These walls 160 and recessed walls 170 are arranged in an alternating pattern. The raised walls 160 are provided with fixing structures 150. These fixing structures 150 are formed by welding or bonding and connect and secure at least a portion of the rotor laminations 110 at both ends of the core segments 100.

[0218] The rotating shaft 20 is connected to the rotor core 10 by an interference fit. Specifically, the outer surface of the rotating shaft 20 is provided with knurling and / or ribs. The rotating shaft 20 and the rotor core 10 are partially or completely interference fit.

[0219] The axial lengths of the plurality of core segments 100 are equal. Two adjacent core segments 100 are staggered by the same angle in the circumferential direction of the rotor core 10. The rotor core 10 and the permanent magnet 30 are connected by bonding.

[0220] like Figure 1 、 Figure 2 and Figure 3 As shown, the rotor core 10 includes a plurality of rotor sheets 110 . The rotor core 10 is provided with magnet slots 200 , lightening holes 180 and shaft holes 190 . The outer peripheral wall of the rotor core 10 has a protruding wall 160 and a recessed wall 170 .

[0221] The rotor punching 110 has a plurality of evenly distributed protrusions 142 and grooves 144 . The protrusions 142 and grooves 144 of adjacent rotor punchings 110 are interference-connected, thereby fixing the rotor punchings 110 to each other in the axial direction of the rotor core 10 .

[0222] In this application, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integrally connected; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0223] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A rotor core, characterized in that: include: A plurality of core segments are stacked, and in at least a portion of the core segments, any two adjacent core segments are staggered in the circumferential direction of the rotor core; The core segment includes a plurality of stacked rotor punchings, and the core segment is provided with a mounting hole and a mounting slot, wherein both the mounting hole and the mounting slot penetrate the plurality of rotor punchings along the axial direction of the rotor core; The mounting holes of the plurality of core segments are connected to form an axial hole, and the mounting slots of the plurality of core segments are connected to form a magnet slot; The core segment is further provided with a connecting structure, which is closer to the mounting hole than the mounting groove, and any two adjacent rotor punchings are detachably connected via the connecting structure; The outer peripheral wall of the core segment is provided with a fixing structure, and the fixing structure is used to connect a part of the rotor punchings among the plurality of rotor punchings.

2. The rotor core according to claim 1, characterized in that The fixed structure includes: A first fixing portion, one end of which is adjacent to an axial end portion of one side of the core segment, and at least a portion of which extends along the axial direction of the rotor core.

3. The rotor core according to claim 2, wherein: The fixed structure further comprises: A second fixing portion, one end of the second fixing portion is adjacent to the other axial end of the core segment, at least a portion of the second fixing portion extends along the axial direction of the rotor core, and the second fixing portion and the first fixing portion are arranged at intervals.

4. The rotor core according to claim 2, wherein: The core segment includes m rotor punchings, and the number of the rotor punchings connected to the first fixing portion is n, wherein 2≤n<m / 2.

5. The rotor core according to any one of claims 1 to 3, characterized in that: There are multiple fixing structures, and the multiple fixing structures are arranged at intervals along the circumferential direction of the rotor core.

6. The rotor core according to any one of claims 1 to 3, characterized in that: The fixing structure includes a welding fixing portion and / or an adhesive fixing portion.

7. The rotor core according to any one of claims 1 to 3, characterized in that: Along the circumference of the rotor core, the outer peripheral wall of the core segment includes a plurality of raised walls and a plurality of recessed walls, the plurality of raised walls and the plurality of recessed walls are arranged alternately, and the raised wall is provided with the fixing structure.

8. The rotor core according to any one of claims 1 to 3, characterized in that: The connecting structure includes a convex portion and a groove, the groove is provided on the first axial end surface of the rotor punching, and the convex portion is provided on the second axial end surface of the rotor punching; In two adjacent rotor punchings, the protrusion of one rotor punching is interference fit with the groove of the other rotor punching.

9. The rotor core according to claim 8, characterized in that A portion of the rotor punching is recessed to form the protrusion and the groove.

10. The rotor core according to any one of claims 1 to 3, characterized in that: A portion of the core segment located between the mounting groove and the mounting hole is further provided with a weight-reducing hole, and the weight-reducing hole penetrates the plurality of rotor punchings along the axial direction of the rotor core.

11. A rotor, characterized in that: include: shaft; a plurality of permanent magnets; and According to any one of claims 1 to 10, the rotating shaft is interference fit with the shaft hole of the rotor core, and the permanent magnet is provided in the magnet slot of the rotor core.

12. The rotor according to claim 11, characterized in that The axial length of the permanent magnet is smaller than the axial length of the magnet slot, and a gap is provided between the outer peripheral wall of the permanent magnet and the slot wall of the magnet slot.

13. A motor, characterized in that: include: A rotor as claimed in claim 11 or 12.

14. A chassis system, characterized in that: include: The motor as claimed in claim 13.

15. A vehicle, characterized in that: include: The electric machine according to claim 13; or the chassis system according to claim 14.

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