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. The rotor iron core comprises an iron core section, the iron core section comprises a plurality of superposed rotor punching sheets, the iron core section is provided with a mounting hole and a via hole, the mounting hole and the via hole penetrate through the plurality of rotor punching sheets along the axial direction of the rotor iron core, and at least one part of the hole wall of the mounting hole is a tooth-shaped wall; the iron core section is further provided with a connecting structure, the via hole is located between the mounting hole and the connecting structure, and any two adjacent rotor punching sheets are detachably connected through the connecting structure. The structural arrangement of the mounting hole is combined with the arrangement position of the via hole, so that the situation that the binding force among the plurality of rotor punching sheets is damaged by the radial force formed by the interference fit of the rotating shaft and the rotor iron core can be avoided, and the stability and reliability of the connection of the plurality of rotor punching sheets of the iron core section can be 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 consists of a rotor core and a rotating shaft. The rotor core is composed of multiple stacked laminations. The shaft and rotor core have an interference fit. During assembly, the radial force generated by the interference fit between the shaft and the shaft hole can overcome the binding force between the rotor laminations, causing deformation of the rotor laminations and, in turn, loosening of the rotor laminations. This can increase the motor's vibration and noise, and reduce product performance. Utility Model Content

[0003] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present application provides a rotor core.

[0005] A second aspect of the present application provides a rotor.

[0006] A third aspect of the present application provides a motor.

[0007] A fourth aspect of the present application provides a chassis system.

[0008] A fifth aspect of the present application provides a vehicle.

[0009] In view of this, the first aspect of the present application provides a rotor core, comprising: a core segment, the core segment comprising a plurality of stacked rotor punchings, the core segment being provided with mounting holes and through holes, both of which penetrate through the plurality of rotor punchings along the axial direction of the rotor core, and at least a portion of the hole wall of the mounting hole being a toothed wall; the core segment is also provided with a connecting structure, the through hole being located between the mounting hole and the connecting structure, and any two adjacent rotor punchings being detachably connected through the connecting structure.

[0010] The present application provides a rotor core comprising a core segment, wherein the core segment comprises a plurality of rotor punchings, and the plurality of rotor punchings are stacked along the axial direction of the rotor core.

[0011] The core segment is provided with a mounting hole and a through hole. The mounting hole passes through multiple rotor punchings along the axial direction of the rotor core, and the through hole passes through multiple rotor punchings along the axial direction of the rotor core. The mounting hole is used to assemble the rotating shaft. Specifically, the rotating shaft is provided through the mounting hole.

[0012] The core segment also includes a connecting structure, through which any two adjacent rotor laminations can be detachably connected. In other words, the connecting structure can connect and secure the multiple rotor laminations from multiple directions and positions, thereby enhancing the structural rigidity of the assembled rotor laminations.

[0013] The via hole is located between the mounting hole and the connecting structure, that is, at least a portion of the via hole is disposed opposite the connecting structure, and at least a portion of the via hole is disposed opposite the mounting hole. The positioning of the via hole can effectively reduce the radial force transmitted to the external connecting structure. This can effectively reduce the radial force transmitted to the external connecting structure, allowing the connecting structure to provide sufficient torsional resistance to the multiple rotor punchings, preventing the radial force generated by the interference fit between the rotating shaft and the rotor core from destroying the bonding force between the multiple rotor punchings, and thus improving the stability and reliability of the connection between the multiple rotor punchings of 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] In addition, at least a portion of the hole wall of the mounting hole is a serrated wall, that is, a portion of the hole wall of the mounting hole is a serrated wall, or the entire hole wall of the mounting hole is a serrated wall.

[0016] The rotating shaft is connected to the mounting hole. The toothed wall of the mounting hole forms an interference fit with the rotating shaft. This arrangement can reduce the contact area between the mounting hole and the rotating shaft. That is, while ensuring the required interference fit between the rotating shaft and the mounting hole, the reduced contact area can also reduce the radial force generated by the interference fit between the rotating shaft and the mounting hole. This can reduce the impact of this radial force on the bonding force between the rotor punchings, thereby reducing the probability of deformation of the rotor punchings and further reducing the probability of multiple rotor punchings becoming loose.

[0017] In other words, the structural setting of the mounting hole combined with the setting position of the through hole can avoid the situation where the radial force formed by the interference fit between the rotating shaft and the rotor core destroys the bonding force between multiple rotor punchings, which is beneficial to improving the stability and reliability of the connection between multiple rotor punchings of the core segment.

[0018] At the same time, this structural setting can provide the rotor punchings with sufficient torsional resistance without adding additional processes and improving processing accuracy, reduce the maximum pressing force of multiple rotor punchings, and help reduce the probability of multiple rotor punchings becoming loose.

[0019] The rotor core described above in this application may also have the following additional technical features:

[0020] In some embodiments, optionally, there are multiple vias and multiple connection structures; in at least a portion of the connection structures, each connection structure is arranged opposite to at least one via.

[0021] In this embodiment, the number of via holes and connection structures is further defined, as well as the arrangement positions of the via holes and connection structures.

[0022] Specifically, the number of the via holes and the number of the connection structures are both plural, that is, the number of the via holes is plural, and the number of the connection structures is plural.

[0023] In a portion of the plurality of connection structures, each connection structure is arranged opposite to at least one via hole.

[0024] Alternatively, any connection structure among the plurality of connection structures is arranged opposite to at least one via hole.

[0025] By defining the positional relationship between the multiple connection structures and the multiple vias, the radial force on at least a portion of the connection structure can be effectively reduced. This effectively reduces the radial force transmitted to the external crimping portion, allowing the connection structure to provide sufficient torsional resistance to the multiple rotor punchings, effectively preventing the rotor punchings from breaking apart.

[0026] In some embodiments, optionally, the toothed wall includes a plurality of convex walls and a plurality of concave walls, and the plurality of convex walls and the plurality of concave walls are staggered along the circumference of the rotor core; and both the convex walls and the concave walls extend along the axial direction of the rotor core.

[0027] In this embodiment, the structure of the toothed wall is further defined.

[0028] The tooth-shaped wall includes a plurality of convex walls and a plurality of concave walls. The plurality of convex walls and the plurality of concave walls are arranged alternately along the circumference of the rotor core. Both the convex walls and the concave walls extend along the axial direction of the rotor core.

[0029] The convex wall of the toothed wall is interference fit with the rotating shaft.

[0030] This setting can reduce the contact area between the mounting hole and the rotating shaft. That is, while ensuring the use requirement of the interference fit between the rotating shaft and the mounting hole, it can also reduce the radial force generated by the interference fit between the rotating shaft and the mounting hole due to the reduction of the contact area between the mounting hole and the rotating shaft, and can reduce the influence of the radial force on the bonding force between the rotor punchings, which is beneficial to reducing the probability of deformation of the rotor punchings and can further reduce the probability of multiple rotor punchings becoming loose.

[0031] In some embodiments, optionally, the core segment is further provided with a mounting groove, which penetrates the plurality of rotor punchings along the axial direction of the rotor core; and the connection structure is closer to the mounting hole than the mounting groove.

[0032] In this embodiment, the structure of the core segment is further defined so that the mounting groove passes through the plurality of rotor punchings along the axial direction of the rotor core. The mounting groove is used to assemble the permanent magnet of the rotor. Specifically, the permanent magnet is arranged in the mounting groove.

[0033] The connecting structure 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. This arrangement provides sufficient installation space for the connecting structure and provides structural support for ensuring the effective assembly of multiple rotor punchings.

[0034] It can be understood that if the mounting groove is closer to the mounting hole than the connecting structure, the distance from the connecting structure to the outer peripheral wall of the core segment is closer, and the distance from the connecting structure to the mounting hole is farther. When the rotor core and the rotating shaft are interference fit, the radial force formed by the interference fit between the rotating shaft and the mounting hole can easily overcome the binding force between the rotor punchings, which can easily cause the rotor punchings to become loose, and will weaken the strength of the connecting structure to fix multiple rotor punchings.

[0035] 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.

[0036] In this embodiment, the connection structure is further defined.

[0037] Wherein, the connection structure includes a protrusion and a groove.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In some embodiments, optionally, a portion of the rotor punching is recessed to form a protrusion and a groove.

[0042] 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.

[0043] In some embodiments, optionally, the core segment is further provided with a weight-reducing hole, which passes through the plurality of rotor punchings along the axial direction of the rotor core; and the through hole is closer to the mounting hole than the weight-reducing hole.

[0044] In this embodiment, the structure of the core segments is further defined.

[0045] The core segment is also provided with a weight-reducing hole. The portion of the core segment between the through hole and the outer peripheral wall of the core segment is provided with the weight-reducing hole. The weight-reducing hole passes through the plurality of rotor punchings along the axial direction of the rotor core.

[0046] 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.

[0047] In addition, a portion of the core segment between the through hole and the outer peripheral wall of the core segment is provided with a weight-reducing hole, which provides sufficient layout space for the weight-reducing hole and can ensure the structural strength of the rotor core.

[0048] 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.

[0049] In some embodiments, optionally, there are multiple core segments, the multiple core segments are stacked, the mounting holes of the multiple core segments are connected to form an axial hole, and the mounting slots of the multiple core segments are connected to form a magnet slot; in at least a portion of the core segments, any two adjacent core segments are staggered in the circumferential direction of the rotor core.

[0050] In this embodiment, the number and arrangement positions of the core segments are further defined.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] In some embodiments, optionally, along the axial direction of the rotor core, the rotating shaft includes a first connecting segment and a second connecting segment connected to each other, the outer diameter of the first connecting segment is smaller than the outer diameter of the second connecting segment; the second connecting segment is passed through the rotor core, and a chamfer is provided at the connection between the first connecting segment and the second connecting segment.

[0057] In this embodiment, the structures of the rotating shaft and the rotor core are further defined.

[0058] The rotating shaft includes a first connecting section and a second connecting section, wherein the first connecting section and the second connecting section are connected. The outer diameter of the first connecting section is smaller than the outer diameter of the second connecting section, and a chamfer is provided at the connection between the first connecting section and the second connecting section.

[0059] The chamfered structure allows the chamfer to guide the shaft during assembly, allowing the shaft to be smoothly inserted into the rotor core, thus providing reliable structural support for the effective assembly of the shaft and the rotor core.

[0060] In addition, the outer diameter of the first connecting section is smaller than that of the second connecting section. When assembling the rotor core and the rotating shaft, the first connecting section first passes through the shaft hole, and then the second connecting section and the shaft hole are interference fit.

[0061] In some embodiments, optionally, the chamfer angle is less than or equal to 30°.

[0062] In this embodiment, the structures of the rotating shaft and the rotor core are further defined.

[0063] The connection between the first and second connecting sections of the rotating shaft is chamfered. The chamfer angle is less than or equal to 30°. This configuration not only provides a guide for assembly, but also reduces the difficulty of chamfering.

[0064] In some embodiments, optionally, the number of the first connecting segments is two, and the second connecting segment is located between the two first connecting segments.

[0065] In this embodiment, the matching structure of the first connecting segment and the second connecting segment is further defined.

[0066] There are two first connecting segments, and the second connecting segment is located between the two first connecting segments, that is, the second connecting segment is located in the middle, and the first connecting segment is located at the end.

[0067] 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.

[0068] In this embodiment, the matching structure of the permanent magnet and the magnet slot is further defined.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] A third aspect of the present invention provides a motor, comprising: a rotor as in the second aspect.

[0073] 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.

[0074] A fourth aspect of the present invention provides a chassis system, comprising: the motor as in the third aspect.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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

[0080] 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:

[0081] Figure 1 A partial structural schematic diagram of a core segment according to an embodiment of the present application is shown;

[0082] Figure 2 A partial structural schematic diagram of a rotor punching according to an embodiment of the present application is shown;

[0083] Figure 3 A schematic diagram of the first part of the structure of a rotor according to an embodiment of the present application is shown;

[0084] Figure 4 A schematic diagram of the second part of the structure of the rotor of an embodiment of the present application is shown.

[0085] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0086] 1 rotor, 10 rotor core, 100 core segment, 110 rotor punching, 120 mounting hole, 130 through hole, 140 connection structure, 142 protrusion, 144 groove, 150 mounting slot, 160 weight reduction hole, 170 raised segment, 180 recessed segment, 192 shaft hole, 194 magnet slot, 20 rotating shaft, 210 first connecting segment, 220 second connecting segment, 230 chamfer, 30 permanent magnet, 40 toothed wall, 410 protruding wall, 420 recessed wall. DETAILED DESCRIPTION

[0087] 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.

[0088] 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.

[0089] 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.

[0090] like Figure 1 and Figure 2 As shown, a rotor core 10 according to some embodiments of the present application includes a core segment 100 .

[0091] The core segment 100 includes a plurality of stacked rotor laminations 110 .

[0092] The core segment 100 is provided with a mounting hole 120 and a through hole 130 .

[0093] The mounting holes 120 and the through holes 130 both penetrate the plurality of rotor sheets 110 in the axial direction of the rotor core 10 .

[0094] At least a portion of the hole wall of the mounting hole 120 is a toothed wall 40 .

[0095] The core segment 100 is further provided with a connecting structure 140 .

[0096] The via hole 130 is located between the mounting hole 120 and the connecting structure 140 .

[0097] Any two adjacent rotor punchings 110 can be detachably connected via the connecting structure 140 .

[0098] The present application provides a rotor core 10 including a core segment 100 . The core segment 100 includes a plurality of rotor punchings 110 , which are stacked along the axial direction of the rotor core 10 .

[0099] The core segment 100 is provided with a mounting hole 120 and a through hole 130. The mounting hole 120 extends through the plurality of rotor sheets 110 along the axial direction of the rotor core 10, and the through hole 130 extends through the plurality of rotor sheets 110 along the axial direction of the rotor core 10. The mounting hole 120 is used to assemble the rotating shaft 20. Specifically, the rotating shaft 20 is provided through the mounting hole 120.

[0100] The core segment 100 is further provided with a connecting structure 140, through which any two adjacent rotor punchings 110 among the plurality of rotor punchings 110 can be detachably connected. In other words, the connection structure 140 can connect and secure the plurality of rotor punchings 110 from multiple directions and positions, thereby enhancing the structural rigidity of the assembly of the plurality of rotor punchings 110.

[0101] The through hole 130 is located between the mounting hole 120 and the connecting structure 140. That is, at least a portion of the through hole 130 is disposed opposite the connecting structure 140, and at least a portion of the through hole 130 is disposed opposite the mounting hole 120. The positioning of the through hole 130 can effectively reduce the radial force transmitted to the external connecting structure 140. This effectively reduces the radial force transmitted to the external connecting structure 140, allowing the connecting structure 140 to provide sufficient torsional resistance for the multiple rotor punchings 110, preventing the radial force generated by the interference fit between the rotating shaft 20 and the rotor core 10 from destroying the bonding force between the multiple rotor punchings 110, and thus improving the stability and reliability of the connection between the multiple rotor punchings 110 of the core segment 100.

[0102] 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.

[0103] 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.

[0104] In addition, at least a portion of the hole wall of the mounting hole 120 is the serrated wall 40 . That is, a portion of the hole wall of the mounting hole 120 is the serrated wall 40 , or the entire hole wall of the mounting hole 120 is the serrated wall 40 .

[0105] The rotating shaft 20 is connected to the mounting hole 120. The toothed wall 40 of the mounting hole 120 has an interference fit with the rotating shaft 20. This arrangement can reduce the contact area between the mounting hole 120 and the rotating shaft 20. That is, while ensuring the required interference fit between the rotating shaft 20 and the mounting hole 120, the reduced contact area can also reduce the radial force generated by the interference fit between the rotating shaft 20 and the mounting hole 120. This can reduce the impact of this radial force on the bonding force between the rotor punchings 110, thereby reducing the probability of deformation of the rotor punchings 110 and further reducing the probability of multiple rotor punchings 110 becoming loose.

[0106] In other words, the structural setting of the mounting hole 120 combined with the setting position of the through hole 130 can avoid the radial force generated by the interference fit between the rotating shaft 20 and the rotor core 10 from destroying the bonding force between the multiple rotor punchings 110, which is beneficial to improving the stability and reliability of the connection between the multiple rotor punchings 110 of the core segment 100.

[0107] At the same time, this structural setting can provide the rotor punching 110 with sufficient torsional resistance without adding additional processes and improving processing accuracy, reduce the maximum pressing force of multiple rotor punchings 110, and help reduce the probability of multiple rotor punchings 110 becoming loose.

[0108] In some embodiments, optionally, as Figure 1 As shown, there are multiple vias 130 and multiple connection structures 140 .

[0109] In at least a portion of the connection structures 140 , each connection structure 140 is disposed opposite to at least one via 130 .

[0110] In this embodiment, the number of the via holes 130 and the connection structure 140 is further defined, as well as the arrangement positions of the via holes 130 and the connection structure 140 are defined.

[0111] Specifically, the number of the via holes 130 and the number of the connection structures 140 are both plural. That is, the number of the via holes 130 is plural, and the number of the connection structures 140 is plural.

[0112] In a portion of the connection structures 140 among the plurality of connection structures 140 , each connection structure 140 is disposed opposite to at least one via 130 .

[0113] Alternatively, any connection structure 140 among the plurality of connection structures 140 is disposed opposite to at least one via 130 .

[0114] By defining the positional relationship between the plurality of connection structures 140 and the plurality of through holes 130, the radial force on at least a portion of the connection structures 140 can be effectively reduced. This effectively reduces the radial force transmitted to the external crimping portion, enabling the connection structures 140 to provide the plurality of rotor punchings 110 with sufficient torsional resistance, effectively preventing the rotor punchings 110 from falling apart.

[0115] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, the toothed wall 40 includes a plurality of convex walls 410 and a plurality of concave walls 420 , which are staggered along the circumference of the rotor core 10 ; both the convex walls 410 and the concave walls 420 extend along the axial direction of the rotor core 10 .

[0116] In this embodiment, the structure of the toothed wall 40 is further defined.

[0117] The toothed wall 40 includes a plurality of convex walls 410 and a plurality of concave walls 420. The convex walls 410 and the concave walls 420 are alternately arranged along the circumference of the rotor core 10. Both the convex walls 410 and the concave walls 420 extend along the axial direction of the rotor core 10.

[0118] The convex wall 410 of the toothed wall 40 is interference-fitted with the rotating shaft 20 .

[0119] This arrangement can reduce the contact area between the mounting hole 120 and the rotating shaft 20. That is, while ensuring the use requirement of the interference fit between the rotating shaft 20 and the mounting hole 120, it can also reduce the radial force generated by the interference fit between the rotating shaft 20 and the mounting hole 120 due to the reduction in the contact area between the mounting hole 120 and the rotating shaft 20, and can reduce the influence of the radial force on the bonding force between the rotor punchings 110, which is beneficial to reducing the probability of deformation of the rotor punchings 110 and can further reduce the probability of multiple rotor punchings 110 becoming loose.

[0120] In some embodiments, optionally, as Figure 1 As shown, the core segment 100 is further provided with a mounting groove 150 , and the mounting groove 150 penetrates the plurality of rotor punchings 110 along the axial direction of the rotor core 10 .

[0121] The connection structure 140 is closer to the mounting hole 120 than the mounting groove 150 .

[0122] In this embodiment, the structure of the core segment 100 is further defined so that the mounting groove 150 penetrates the plurality of rotor sheets 110 along the axial direction of the rotor core 10. The mounting groove 150 is used to assemble the permanent magnet 30 of the rotor 1. Specifically, the permanent magnet 30 is disposed in the mounting groove 150.

[0123] The connecting structure 140 is closer to the mounting hole 120 than the mounting slot 150, that is, the distance between the connecting structure 140 and the mounting hole 120 is smaller than the distance between the mounting slot 150 and the mounting hole 120. This arrangement provides sufficient installation space for the connecting structure 140 and provides structural support for ensuring the effective assembly of multiple rotor punchings 110.

[0124] It can be understood that if the mounting groove 150 is closer to the mounting hole 120 than the connecting structure 140, the distance between the connecting structure 140 and the outer peripheral wall of the core segment 100 is closer, and the distance between the connecting structure 140 and the mounting hole 120 is farther. When the rotor core 10 and the rotating shaft 20 are interference fit, the radial force formed by the interference fit between the rotating shaft 20 and the mounting hole 120 can easily overcome the binding force between the rotor punchings 110, which can easily cause the rotor punchings 110 to become loose, and will weaken the strength of the connecting structure 140 to fix multiple rotor punchings 110.

[0125] In some embodiments, optionally, as Figure 1 As shown, the connection structure 140 includes a protrusion 142 and a groove 144 .

[0126] A groove 144 is formed on the first axial end surface of the rotor punch 110 .

[0127] A convex portion 142 is formed on the second axial end surface of the rotor punching 110 .

[0128] 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 .

[0129] In this embodiment, a connecting structure 140 is further defined.

[0130] The connection structure 140 includes a protrusion 142 and a groove 144 .

[0131] 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.

[0132] 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 .

[0133] 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.

[0134] In some embodiments, optionally, a portion of the rotor punching 110 is recessed to form the protrusion 142 and the groove 144 .

[0135] 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.

[0136] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, the core segment 100 is further provided with a lightening hole 160 .

[0137] The lightening holes 160 penetrate the plurality of rotor sheets 110 along the axial direction of the rotor core 10 .

[0138] The through hole 130 is closer to the mounting hole 120 than the lightening hole 160 .

[0139] In this embodiment, the structure of the core segment 100 is further defined.

[0140] The core segment 100 is further provided with a lightening hole 160 . The portion of the core segment 100 between the through hole 130 and the outer peripheral wall of the core segment 100 is provided with a lightening hole 160 . The lightening hole 160 penetrates the plurality of rotor punchings 110 along the axial direction of the rotor core 10 .

[0141] This arrangement reasonably limits the position of the weight-reducing hole 160 , and can reduce the moment of inertia and the overall weight of the motor while ensuring that the motor performance is not affected.

[0142] In addition, a portion of the core segment 100 between the through hole 130 and the outer peripheral wall of the core segment 100 is provided with a lightening hole 160 , which provides sufficient layout space for the lightening hole 160 and can ensure the structural strength of the rotor core 10 .

[0143] If the lightening hole 160 is located between the mounting groove 150 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.

[0144] Optionally, at least a portion of the through hole 130 is disposed opposite to the lightening hole 160 .

[0145] Optionally, the through hole 130 and the weight-reducing hole 160 are staggered.

[0146] In some embodiments, optionally, as Figure 3 As shown, there are multiple core segments 100 .

[0147] A plurality of core segments 100 are stacked.

[0148] The mounting holes 120 of the plurality of core segments 100 pass through to form an axial hole 192 .

[0149] The mounting slots 150 of the plurality of core segments 100 are connected to form a magnet slot 194 .

[0150] 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 .

[0151] In this embodiment, the number and arrangement positions of the core segments 100 are further defined.

[0152] 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.

[0153] 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.

[0154] The mounting holes 120 of the core segments 100 are connected to form an axial hole 192. The axial hole 192 is used to assemble the rotating shaft 20. The rotating shaft 20 is disposed through the axial hole 192. The mounting slots 150 of the core segments 100 are connected to form magnet slots 194. The magnet slots 194 are used to assemble the permanent magnets 30 of the rotor 1. Specifically, the permanent magnets 30 are disposed in the magnet slots 194.

[0155] like Figure 3 and Figure 4 As shown, a rotor 1 according to some further embodiments of the present application includes: a rotating shaft 20, a plurality of permanent magnets 30 and a rotor core 10 according to any of the above embodiments.

[0156] The rotating shaft 20 is interference-fitted with the shaft hole 192 of the rotor core 10 .

[0157] Permanent magnets 30 are disposed in the magnet slots 194 of the rotor core 10 .

[0158] The present application provides a rotor 1 including a rotating shaft 20 , a plurality of permanent magnets 30 and a rotor core 10 .

[0159] 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 .

[0160] The core segment 100 is provided with a mounting hole 120 and a through hole 130. The mounting hole 120 extends through the plurality of rotor sheets 110 along the axial direction of the rotor core 10, and the through hole 130 extends through the plurality of rotor sheets 110 along the axial direction of the rotor core 10. The mounting hole 120 is used to assemble the rotating shaft 20. Specifically, the rotating shaft 20 is provided through the mounting hole 120.

[0161] The core segment 100 is further provided with a connecting structure 140, through which any two adjacent rotor punchings 110 among the plurality of rotor punchings 110 can be detachably connected. In other words, the connection structure 140 can connect and secure the plurality of rotor punchings 110 from multiple directions and positions, thereby enhancing the structural rigidity of the assembly of the plurality of rotor punchings 110.

[0162] The through hole 130 is located between the mounting hole 120 and the connecting structure 140. That is, at least a portion of the through hole 130 is disposed opposite the connecting structure 140, and at least a portion of the through hole 130 is disposed opposite the mounting hole 120. The positioning of the through hole 130 can effectively reduce the radial force transmitted to the external connecting structure 140. This effectively reduces the radial force transmitted to the external connecting structure 140, allowing the connecting structure 140 to provide sufficient torsional resistance for the multiple rotor punchings 110, preventing the radial force generated by the interference fit between the rotating shaft 20 and the rotor core 10 from destroying the bonding force between the multiple rotor punchings 110, and thus improving the stability and reliability of the connection between the multiple rotor punchings 110 of the core segment 100.

[0163] 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.

[0164] In some other embodiments, at least a portion of the outer peripheral wall of the rotating shaft 20 is a toothed wall 40 .

[0165] In some embodiments, optionally, as Figure 3 and Figure 4 As shown, along the axial direction of the rotor core 10 , the rotating shaft 20 includes a first connecting section 210 and a second connecting section 220 that are connected to each other.

[0166] The outer diameter of the first connecting section 210 is smaller than the outer diameter of the second connecting section 220 .

[0167] The second connecting section 220 passes through the rotor core 10 .

[0168] A chamfer 230 is provided at the connection between the first connecting section 210 and the second connecting section 220 .

[0169] In this embodiment, the structures of the rotating shaft 20 and the rotor core 10 are further defined.

[0170] The rotating shaft 20 includes a first connecting section 210 and a second connecting section 220. The first connecting section 210 has a smaller outer diameter than the second connecting section 220, and a chamfer 230 is provided at the connection between the first connecting section 210 and the second connecting section 220.

[0171] The structural setting of the chamfer 230 allows the chamfer 230 to guide the rotating shaft 20 when the rotating shaft 20 and the rotor core 10 are assembled, so that the rotating shaft 20 can be smoothly inserted into the rotor core 10, providing reliable structural support for the effective assembly of the rotating shaft 20 and the rotor core 10.

[0172] In addition, the outer diameter of the first connecting section 210 is smaller than the outer diameter of the second connecting section 220 . When assembling the rotor core 10 and the rotating shaft 20 , the first connecting section 210 first passes through the shaft hole 192 , and then the second connecting section 220 and the shaft hole 192 are interference fit.

[0173] In some embodiments, optionally, as Figure 4 As shown, the angle a of the chamfer 230 is less than or equal to 30°.

[0174] In this embodiment, the structures of the rotating shaft 20 and the rotor core 10 are further defined.

[0175] The connection between the first connecting section 210 and the second connecting section 220 of the rotating shaft 20 is provided with a chamfer 230. The angle a of the chamfer 230 is less than or equal to 30 degrees. This configuration allows the rotating shaft 20 to serve as a guide for assembly and also reduces the difficulty of machining the chamfer 230.

[0176] Optionally, the angle a of the chamfer 230 includes 20°, 22°, 23°, 25°, 28°, 29°, etc., which are not listed here one by one.

[0177] In some embodiments, optionally, there are two first connecting segments 210 , and the second connecting segment 220 is located between the two first connecting segments 210 .

[0178] In this embodiment, the matching structure of the first connecting segment 210 and the second connecting segment 220 is further defined.

[0179] There are two first connecting segments 210, and the second connecting segment 220 is located between the two first connecting segments 210. That is, the second connecting segment 220 is located in the middle, and the first connecting segment 210 is located at the end.

[0180] In some embodiments, optionally, the axial length of the permanent magnet 30 is smaller than the axial length of the magnet slot 194 .

[0181] There is a gap between the outer peripheral wall of the permanent magnet 30 and the groove wall of the magnet groove 194 .

[0182] In this embodiment, the matching structure of the permanent magnet 30 and the magnet slot 194 is further defined.

[0183] The axial length of the permanent magnet 30 is shorter than the axial length of the magnet slot 194. 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 194. In other words, the permanent magnet 30 can be completely accommodated in the magnet slot 194, thereby reducing the probability of squeezing the permanent magnet 30 and causing damage to the permanent magnet 30.

[0184] If the axial length of the permanent magnet 30 is greater than or equal to the axial length of the magnet slot 194, a portion of the permanent magnet 30 may easily protrude from the rotor core 10. This setting may easily cause the permanent magnet 30 to be squeezed and damaged, and the performance of the motor cannot be guaranteed.

[0185] There is a gap between the outer circumferential wall of the permanent magnet 30 and the slot wall of the magnet slot 194. 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 194. 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 194.

[0186] According to some further embodiments of the present application, a motor includes: the rotor 1 as in the above embodiment.

[0187] The present application provides a motor including a rotor 1 .

[0188] The rotor 1 includes a rotation shaft 20 , a plurality of permanent magnets 30 , and a rotor core 10 .

[0189] 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 .

[0190] The core segment 100 is provided with a mounting hole 120 and a through hole 130. The mounting hole 120 extends through the plurality of rotor sheets 110 along the axial direction of the rotor core 10, and the through hole 130 extends through the plurality of rotor sheets 110 along the axial direction of the rotor core 10. The mounting hole 120 is used to assemble the rotating shaft 20. Specifically, the rotating shaft 20 is provided through the mounting hole 120.

[0191] The core segment 100 is further provided with a connecting structure 140, through which any two adjacent rotor punchings 110 among the plurality of rotor punchings 110 can be detachably connected. In other words, the connection structure 140 can connect and secure the plurality of rotor punchings 110 from multiple directions and positions, thereby enhancing the structural rigidity of the assembly of the plurality of rotor punchings 110.

[0192] The through hole 130 is located between the mounting hole 120 and the connecting structure 140. That is, at least a portion of the through hole 130 is disposed opposite the connecting structure 140, and at least a portion of the through hole 130 is disposed opposite the mounting hole 120. The positioning of the through hole 130 can effectively reduce the radial force transmitted to the external connecting structure 140. This effectively reduces the radial force transmitted to the external connecting structure 140, allowing the connecting structure 140 to provide sufficient torsional resistance for the multiple rotor punchings 110, preventing the radial force generated by the interference fit between the rotating shaft 20 and the rotor core 10 from destroying the bonding force between the multiple rotor punchings 110, and thus improving the stability and reliability of the connection between the multiple rotor punchings 110 of the core segment 100.

[0193] 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.

[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 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 listed 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] Alternatively, the present application discloses a rotor 1. The rotor 1 includes a rotating shaft 20, a plurality of permanent magnets 30, and a rotor core 10. The rotating shaft 20 and the rotor core 10 are interference-fitted. The permanent magnets 30 are embedded in magnet slots 194 of the rotor core 10.

[0202] The rotor core 10 includes a plurality of rotor sheets 110. The plurality of rotor sheets 110 are stacked.

[0203] The magnet slots 194 are located close to the outer peripheral wall of the rotor core 10 .

[0204] The rotor core 10 includes a plurality of core segments 100 . The core segments 100 are provided with a connection structure 140 . The connection structure 140 includes a protrusion 142 and a groove 144 .

[0205] The grooves 144 are interference-fitted with the protrusions 142 of the adjacent stacked rotor punches 110 to connect the plurality of rotor punches 110 .

[0206] Either the protrusion 142 or the recess 144 is closer to the shaft hole 192 than to the magnet slot 194 .

[0207] An intermediate hole (ie, the through hole 130 ) is provided between the connecting structure 140 and the shaft hole 192 .

[0208] The rotor 1 provided in the present application is easy to process and assemble, and has a low production cost. On the basis of ensuring the connection strength between the rotor core 10 and the rotating shaft 20, the stress on the connecting structure 140 of the rotor 1 during shaft assembly is reduced, thereby avoiding the situation where the laminations of the rotor 1 become loose after being pressed into place. The rotor 1 has good dynamic balance and good noise performance.

[0209] The rotor core 10 includes m rotor laminations 110, where m ≥ 2. The outer peripheral wall of the rotor core 10 has a plurality of magnet slots 194 for accommodating permanent magnets 30. A connecting structure 140 is disposed between the magnet slots 194 and the shaft hole 192. The through hole 130 is located between the connecting structure 140 and the shaft hole 192. A portion of the wall of the shaft hole 192 is a toothed wall 40.

[0210] The permanent magnet 30 is disposed in the magnet slot 194 .

[0211] The rotating shaft 20 is interference-connected to the rotor core 10 .

[0212] The connection structure 140 includes a protrusion 142 and a groove 144. The groove 144 is in interference contact with the protrusion 142 of the adjacent rotor punch 110 to form the connection structure 140.

[0213] At least a portion of the hole wall of the shaft hole 192 is a toothed wall 40. The convex wall 410 of the toothed wall 40 is interference-fitted with the rotating shaft 20, and the concave wall 420 of the toothed wall 40 is clearance-fitted with the rotating shaft 20.

[0214] The axial length of the permanent magnet 30 is smaller than the axial length of the magnet slot 194. There is a gap between the outer peripheral wall of the permanent magnet 30 and the slot wall of the magnet slot 194. The permanent magnet 30 and the slot wall of the magnet slot 194 are fixedly connected by an adhesive.

[0215] The rotating shaft 20 includes a first connecting section 210 and a second connecting section 220 . The second connecting section 220 is disposed through the rotor core 10 , and a chamfer 230 is provided at the connection between the first connecting section 210 and the second connecting section 220 .

[0216] At least a portion of the wall of the shaft hole 192 is a toothed wall 40, which is interference-fitted with the shaft 20. This provides the rotor core 10 with sufficient torsional resistance without adding additional steps and improving machining accuracy, thereby preventing the rotor punchings 110 from becoming loose.

[0217] In addition, the rotor core 10 is provided with a through hole 130 , which is located between the mounting hole 120 and the connecting structure 140 .

[0218] A through hole 130 is provided on a radial line connecting the crimping portion (ie, the connecting structure 140 ) and the center of the rotating shaft 20 . The through hole 130 can effectively reduce the radial force transmitted to the outer crimping portion.

[0219] Along the circumference of the rotor core 10, the outer peripheral wall of the core segment 100 includes a plurality of raised sections 170 and a plurality of recessed sections 180, which are arranged alternately. The raised sections 170 are arc segments that are concentric and eccentric with the shaft hole 192, while the recessed sections 180 are arc segments that are concentric and eccentric with the shaft hole 192. At least a portion of the wall of the shaft hole 192 is a toothed wall 40.

[0220] The outer peripheral wall of the rotating shaft 20 is a cylindrical surface, and at least one side of the rotating shaft 20 is provided with a chamfer 230 , and the angle of the chamfer 230 is less than or equal to 30°.

[0221] Optionally, the rotor 1 is a built-in rotor.

[0222] The rotor core 10 is formed by laminating a plurality of rotor punchings 110. The rotor core 10 includes magnet slots 194, lightening holes 160, shaft holes 192, through-holes 130, raised sections 170, and recessed sections 180 formed by punching. The rotor punchings 110 have a plurality of evenly distributed crimped sections formed by grooves 144 and protrusions 142. The grooves 144 and protrusions 142 of adjacent rotor punchings 110 are interference-fitted, securing the multiple rotor punchings 110 to one another in the axial direction of the rotor core 10.

[0223] A cross-section of groove 144 is taken perpendicularly from the groove opening to the groove bottom. In the cross-section, the contour lines of the groove sidewalls of groove 144 form a trapezoidal shape. The trapezoid has two oppositely disposed long and short bases, and also two side edges. Each side edge is connected between the long and short base edges, 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 groove 144 and protrusion 142, ensure the structural rigidity of two adjacent rotor punchings 110 after assembly, and reduce the possibility of rotor punchings 110 falling apart.

[0224] 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.

[0225] The hole wall of the shaft hole 192 has a concave wall 420 and a convex wall 410 arranged at intervals. A through hole 130 is provided on the connecting line between the shaft hole 192 and the crimping portion.

[0226] 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.

[0227] 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: an iron core segment, the iron core segment comprising a plurality of stacked rotor punchings, the iron core segment being provided with a mounting hole and a through hole, the mounting hole and the through hole both penetrating the plurality of rotor punchings in the axial direction of the rotor iron core, and at least a portion of a hole wall of the mounting hole being a toothed wall; The core segment is further provided with a connecting structure, the through hole is located between the mounting hole and the connecting structure, and any two adjacent rotor punchings are detachably connected via the connecting structure.

2. The rotor core according to claim 1, characterized in that The number of the via holes and the number of the connection structures are both multiple; In at least a portion of the connection structures, each of the connection structures is arranged opposite to at least one of the via holes.

3. The rotor core according to claim 1 or 2, characterized in that: The tooth-shaped wall includes a plurality of convex walls and a plurality of concave walls, and the plurality of convex walls and the plurality of concave walls are staggered along the circumferential direction of the rotor core; The convex wall and the concave wall both extend along the axial direction of the rotor core.

4. The rotor core according to claim 1 or 2, characterized in that: The core segment is further provided with a mounting groove, and the mounting groove penetrates the plurality of rotor punchings along the axial direction of the rotor core; The connecting structure is closer to the mounting hole than the mounting groove.

5. The rotor core according to claim 1 or 2, characterized in that: The core segment 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; The through hole is closer to the mounting hole than the weight-reducing hole.

6. The rotor core according to claim 1 or 2, 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.

7. The rotor core according to claim 6, characterized in that A portion of the rotor punching is recessed to form the protrusion and the groove.

8. The rotor core according to claim 1 or 2, characterized in that: There are multiple core segments, and the multiple core segments are stacked. The mounting holes of the multiple core segments are connected to form an axial hole, and the mounting slots of the multiple core segments are connected to form a magnet slot. In at least a portion of the core segments, any two adjacent core segments are staggered in the circumferential direction of the rotor core.

9. A rotor, characterized in that: include: shaft; a plurality of permanent magnets; and According to any one of claims 1 to 8, 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.

10. The rotor according to claim 9, characterized in that Along the axial direction of the rotor core, the rotating shaft includes a first connecting section and a second connecting section connected to each other, and the outer diameter of the first connecting section is smaller than the outer diameter of the second connecting section; The second connecting section is passed through the rotor core, and a chamfer is provided at a connection between the first connecting section and the second connecting section.

11. The rotor according to claim 10, characterized in that The angle of the chamfer is less than or equal to 30°.

12. The rotor according to any one of claims 9 to 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 any one of claims 9 to 12.

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

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

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