Rotor, motor, steering system and vehicle

Abstract

The utility model provides a rotor, a motor, a steering system and a vehicle. Wherein the rotor comprises a first iron core section group, and the first iron core section group comprises first iron core sections; the plurality of first retainers are arranged on the peripheral side of the first iron core section, the plurality of first retainers are arranged at intervals in the circumferential direction of the rotor, a first mounting groove is defined by every two adjacent first retainers and the first iron core section, and each first retainer is provided with a limiting part; each first permanent magnet is arranged in one first mounting groove, the first mounting grooves are used for limiting the first permanent magnets in the radial direction and the circumferential direction of the rotor, and the limiting parts protrude out of the axial end face of the first iron core section and are used for limiting the first permanent magnets in the axial direction of the rotor. According to the invention, the first iron core section is matched with the plurality of first retainers to fasten and limit the plurality of first permanent magnets in the circumferential direction, the radial direction and the axial direction of the rotor, so that the reliability of the motor can be effectively improved, and the noise of the motor can be suppressed.

Description

Technical Field

[0001] This application relates to the field of electric motor technology, and more specifically, to a rotor, an electric motor, a steering system, and a vehicle. Background Technology

[0002] In related technologies, surface-mounted rotors include annular wound strips and retainers, which fix the rotor's permanent magnets by press-fitting. As the motor's service life increases, there is a risk of the permanent magnets becoming loose, resulting in low safety and reliability of the motor. Utility Model Content

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

[0004] Therefore, the first aspect of this application proposes a rotor.

[0005] The second aspect of this application proposes an electric motor.

[0006] The third aspect of this application proposes a steering system.

[0007] The fourth aspect of this application proposes a vehicle.

[0008] In view of the above, a first aspect of this application provides a rotor, comprising: a first core segment group, the first core segment group comprising: a first core segment; a plurality of first retainers disposed on the outer periphery of the first core segment, the plurality of first retainers being arranged at intervals along the circumference of the rotor, a first mounting groove being formed between two adjacent first retainers and the first core segment, the first retainers being provided with a limiting portion; a plurality of first permanent magnets, each first permanent magnet being disposed in a first mounting groove, the first mounting groove being used to limit the first permanent magnet in the radial and circumferential directions of the rotor, the limiting portion protruding from the axial end face of the first core segment, the limiting portion being used to limit the first permanent magnet in the axial direction of the rotor.

[0009] The rotor provided in this application includes a first core segment group, which includes a first core segment, a plurality of first retaining members, and a plurality of first permanent magnets.

[0010] Any one of the plurality of first retaining members is disposed on the outer periphery of the first core segment, and a first mounting groove is formed between two adjacent first retaining members and the first core segment; that is, the plurality of first retaining members and the first core segment form a plurality of first mounting grooves. Each first mounting groove is provided with a first permanent magnet. The shape of the first permanent magnet matches the shape of the first mounting groove.

[0011] Multiple first retainer substrates and multiple first permanent magnets are assembled circumferentially on the outer periphery of the first core segment. The first retainer substrates are then melted using a hot melt machine to form a first core segment assembly, so that the limiting portion of the first retainer limits the first permanent magnets axially on the rotor. It is understood that the first mounting groove is used to limit the first permanent magnets radially and circumferentially on the rotor, and the limiting portion protrudes from the axial end face of the first core segment, thus limiting the first permanent magnets axially on the rotor.

[0012] In other words, the first iron core segment cooperates with multiple first retaining members to fasten and limit multiple first permanent magnets in the circumferential, radial, and axial directions of the rotor, so that the first permanent magnets are securely assembled onto the first iron core segment. This avoids the possibility of multiple first permanent magnets becoming loose due to assembly errors, ensures the assembly dimensions of the first permanent magnets and the first iron core segment, effectively increases the reliability of the motor, and suppresses motor noise.

[0013] The rotor described above according to this application may also have the following additional technical features:

[0014] In some embodiments, optionally, the axial end face of the first retainer is provided with a limiting portion.

[0015] In this embodiment, the structure of the first retainer is further defined such that a limiting portion is provided on the axial end face of the first retainer. This configuration not only satisfies the requirement of the limiting portion to limit the first permanent magnet in the axial direction of the rotor, but also avoids increasing the radial dimension of the rotor. This ensures the fit dimensions between the stator and rotor of the motor, avoids interference between the rotor and stator, and provides reliable structural support for ensuring the performance of the motor.

[0016] In some embodiments, optionally, along the axial direction of the rotor, the first retainer has a first end face and a second end face disposed opposite to each other, and at least one of the first end face and the second end face is provided with a limiting portion.

[0017] In this embodiment, the structure of the first retainer is further defined.

[0018] Along the axial direction of the rotor, the first retainer has a first end face and a second end face. That is, the first retainer has a first end face and a second end face that are disposed opposite each other in the axial direction of the rotor.

[0019] The first end face is provided with a limiting part, or the second end face is provided with a limiting part, or both the first end face and the second end face are provided with limiting parts.

[0020] That is, the number and location of the limiting parts can be set according to the number of the first core segment group to meet the usage requirements of various types of rotors.

[0021] In some embodiments, optionally, in the limiting portion and the two adjacent first permanent magnets, the first portion of the limiting portion overlaps with one of the first permanent magnets, and the second portion of the limiting portion overlaps with the other first permanent magnet; wherein the limiting portion is closer to the center of the rotor than the radial outer surface of the first permanent magnet.

[0022] In this embodiment, the cooperation structure of the first retainer and the two first permanent magnets adjacent to the first retainer is further defined.

[0023] Specifically, along the rotor's axial direction, the first part of the limiting portion overlaps with one first permanent magnet, and the second part of the limiting portion overlaps with another first permanent magnet. That is, the first part of the limiting portion limits one first permanent magnet along the rotor's axial direction, and the second part of the limiting portion limits another first permanent magnet along the rotor's axial direction. This arrangement allows one limiting portion to limit two adjacent first permanent magnets, preventing the first permanent magnets from becoming loose along the rotor's axial direction.

[0024] It is understandable that the limiting part is located on the same side of the two adjacent first permanent magnets.

[0025] Furthermore, the limiting part is closer to the center of the rotor than the radial outer surface of the first permanent magnet. That is, the limiting part and the radial outer surface of the first permanent magnet are spaced apart. In other words, there is a gap between the limiting part and the radial outer surface of the first permanent magnet. Therefore, the limiting part does not protrude beyond the radial outer surface of the first permanent magnet, thus not affecting the stator-rotor clearance of the motor, preventing interference with the stator, and ensuring the normal operation of the motor.

[0026] In some embodiments, the limiting portion and the axial end faces of the two adjacent first permanent magnets are optionally fitted together.

[0027] In this embodiment, the cooperation structure between the limiting part and the two adjacent first permanent magnets is further defined.

[0028] Specifically, the limiting part and the axial end faces of the two adjacent first permanent magnets are fitted together. This arrangement reduces the axial distance between the limiting part and the two first permanent magnets on the rotor, reduces the amount of axial movement of the first permanent magnets on the rotor, and prevents the first permanent magnets from becoming loose.

[0029] It is understandable that when both the first end face and the second end face of the first retainer are provided with limiting portions, the limiting portion of the first end face is fitted with the axial end faces of the two adjacent first permanent magnets, and the limiting portion of the second end face is fitted with the axial end faces of the two adjacent first permanent magnets.

[0030] Specifically, the hot melt machine presses and melts the limiting post of the first retaining component substrate to form a limiting part, so that the limiting part and the axial end faces of the two adjacent first permanent magnets are fitted together.

[0031] In some embodiments, optionally, when the rotor includes a first core segment group, both the first end face and the second end face are provided with limiting portions; when the rotor includes two first core segment groups, the first core segments of the two first core segment groups are arranged opposite to each other, the first end faces of the two first core segment groups are arranged opposite to each other, and the second end face of the first retainer is provided with limiting portions.

[0032] In this embodiment, the structure of the rotor is further defined.

[0033] When the rotor includes a first core segment assembly, the first retainer has a first end face and a second end face disposed opposite to each other in the axial direction of the rotor, and both the first and second end faces are provided with limiting portions. In the limiting portion located on the first end face and the two adjacent first permanent magnets, the first part of the limiting portion overlaps with one first permanent magnet, and the second part of the limiting portion overlaps with the other first permanent magnet. In the limiting portion located on the second end face and the two adjacent first permanent magnets, the first part of the limiting portion overlaps with one first permanent magnet, and the second part of the limiting portion overlaps with the other first permanent magnet. That is, the limiting portions on both sides of the first retainer can effectively limit the first permanent magnets in the axial direction of the rotor, preventing the first permanent magnets from becoming loose.

[0034] When the rotor includes a first core segment assembly, if a limiting portion is provided on one axial end face of the first retainer, that is, the first end face of the first retainer is provided with a limiting portion, or the second end face of the first retainer is provided with a limiting portion, then the first permanent magnet will loosen towards the side without the limiting portion. This will reduce the reliability of the motor and increase the noise of the motor.

[0035] When the rotor comprises two first core segment groups, after assembly, the first core segments of the two first core segment groups are positioned opposite each other, and their first end faces are positioned opposite each other. A limiting portion is provided on the second end face of the first retainer. That is, the first retainer of each first core segment group only has a limiting portion on its second end face; the first retainer of each first core segment group does not have a limiting portion on its first end face. The two first core segment groups cooperate to secure and limit multiple first permanent magnets in the circumferential, radial, and axial directions of the rotor.

[0036] If both the first and second end faces of the first retainer are provided with limiting portions, the limiting portions at the first end faces of the two first core segments will interfere with each other.

[0037] In some embodiments, the first core segment group may optionally include: a fixing sleeve, the fixing sleeve including: a surrounding plate surrounding the outer periphery of a plurality of first retaining members; a cover plate disposed on one end face of the surrounding plate, the cover plate having a connecting hole, the hole wall of the connecting hole surrounding the periphery of the limiting portion, a portion of the limiting portion being located outside the cover plate, the portion of the limiting portion outside the cover plate blocking the connecting hole, the limiting portion being closer to the center of the rotor than the outer surface of the surrounding plate, and the limiting portion axially limiting the first permanent magnet of the rotor by means of the fixing sleeve.

[0038] In this embodiment, the structure of the first core segment group is further defined such that the first core segment group also includes a fixing sleeve, and the limiting part limits the first permanent magnet through the fixing sleeve.

[0039] Specifically, the fixing sleeve includes a surrounding plate and a cover plate. The surrounding plate surrounds the outer periphery of a plurality of first retaining members, and the cover plate is located on one end face of the surrounding plate. The cover plate has a connecting hole, and a limiting post extends out of the outer surface of the cover plate through the connecting hole, such that a portion of the limiting post is located outside the cover plate. The limiting post located outside the cover plate is press-melted by a hot melt machine to form a limiting part. The portion of the limiting part located outside the cover plate blocks the connecting hole, and the limiting part will not separate from the fixing sleeve through the connecting hole, thus meeting the requirement of effectively limiting the first permanent magnet in the axial direction of the rotor.

[0040] It is understandable that the portion of the limiting part located outside the cover plate blocks the connecting hole, and the outer peripheral wall of the limiting part is located outside the hole wall of the connecting hole. In other words, the portion of the limiting part located outside the cover plate covers the connecting hole.

[0041] In addition, the enclosure and cover plate work together to limit the first permanent magnet in the radial direction, circumferential direction and axial direction of the rotor. The fixing sleeve has the function of protecting the first permanent magnet and collecting the debris of the first permanent magnet, providing structural support to ensure the performance of the motor.

[0042] Understandably, the limiting part is closer to the center of the rotor than the outer surface of the enclosure plate; that is, the limiting part and the outer surface of the enclosure plate are spaced apart. In other words, there is a gap between the limiting part and the outer surface of the enclosure plate. Therefore, the limiting part will not protrude beyond the outer surface of the enclosure plate, thus not affecting the stator-rotor clearance of the motor, preventing interference with the stator, and ensuring the normal operation of the motor.

[0043] In addition, the fixed sleeve and the limiting part work together to position the fixed sleeve in the radial and circumferential directions of the rotor, preventing the fixed sleeve from becoming misaligned.

[0044] In some embodiments, optionally, when the rotor includes a first core segment group, both the first end face and the second end face are provided with limiting portions, the number of fixing sleeves is two, each fixing sleeve cooperates with a limiting portion, and the two fixing sleeves are arranged abutting or spaced apart in the axial direction of the rotor; when the rotor includes two first core segment groups, the first core segments of the two first core segment groups are arranged opposite to each other, the first end faces of the two first core segment groups are arranged opposite to each other, the second end face of the first retainer is provided with a limiting portion, each first core segment group includes a fixing sleeve, and the fixing sleeves of the two first core segment groups are arranged abutting or spaced apart in the axial direction of the rotor.

[0045] In this embodiment, the structure of the rotor is further defined.

[0046] When the rotor includes a first core segment assembly, the first retainer has a first end face and a second end face disposed opposite to each other in the axial direction of the rotor. Both the first end face and the second end face are provided with limiting portions. The rotor includes two fixing sleeves. The limiting portion at the first end face uses one fixing sleeve to limit the first permanent magnet in the axial direction of the rotor, and the limiting portion at the second end face uses another fixing sleeve to limit the first permanent magnet in the axial direction of the rotor, thus preventing the first permanent magnet from becoming loose.

[0047] In addition, the two fixed sleeves are arranged abutting or spaced apart along the axial direction of the rotor. In this way, the two fixed sleeves will not interfere with each other along the axial direction of the rotor.

[0048] When the rotor comprises two first core segment groups, each first core segment group includes a retaining sleeve. After the two first core segment groups are assembled, the first core segments of the two first core segment groups are arranged opposite each other, and the first end faces of the two first core segment groups are arranged opposite each other. The second end face of the first retainer is provided with a limiting portion. That is, the first retainer of each first core segment group is only provided with a limiting portion at the second end face, and the first retainer of each first core segment group is not provided with a limiting portion at the first end face. The two first core segment groups cooperate to fasten and limit multiple first permanent magnets in the circumferential, radial, and axial directions of the rotor.

[0049] In addition, the fixing sleeves of the two first core segment assemblies are arranged abutting or spaced apart in the axial direction of the rotor. In this way, after the two first core segment assemblies are assembled, the fixing sleeves of the two first core segment assemblies will not interfere with each other in the axial direction of the rotor.

[0050] In some embodiments, the fixing sleeve may be a non-magnetic metal sleeve; the thickness of the fixing sleeve is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0051] In this embodiment, the structure of the fixing sleeve is further defined so that the fixing sleeve is a non-magnetic metal sleeve, the fixing sleeve is a metal material that will not cause significant magnetization under the action of a magnetic field, and the magnetic permeability of the fixing sleeve is low, so as not to affect the operating parameters of the motor.

[0052] Optionally, the retaining sleeve includes a stainless steel sleeve, an aluminum alloy sleeve, and a titanium alloy sleeve.

[0053] In this embodiment, the structure of the fixing sleeve is further defined such that the thickness of the fixing sleeve is greater than or equal to 0.1 mm and less than or equal to 0.5 mm. This configuration ensures the effectiveness and feasibility of fixing multiple first permanent magnets and first iron core segments while also ensuring the overall external dimensions of the rotor and the overall dimensions of the motor.

[0054] Optionally, the thickness of the fixing sleeve includes 0.2mm, 0.3mm and 0.4mm, etc., which will not be listed here.

[0055] In some embodiments, optionally, either the first retainer or the first permanent magnet has a gap between itself and the inner surface of the enclosure.

[0056] In this embodiment, the mating structure of the fixing sleeve, the first retaining member, and the first permanent magnet is further defined.

[0057] There is a gap between either the first retainer or the first permanent magnet and the inner surface of the enclosure. There is a gap between the first retainer and the inner surface of the enclosure, and there is a gap between the first permanent magnet and the inner surface of the enclosure. The first retainer and the inner surface of the enclosure are not fitted together, and the first permanent magnet and the inner surface of the enclosure are not fitted together.

[0058] This configuration not only ensures the effectiveness of multiple first retainers in fixing the first permanent magnet between the first retainer and the first iron core segment, but also reduces the machining accuracy requirements of the multiple first retainers and the multiple first permanent magnets. It can also reduce the resistance when assembling the fixing sleeve, so that the fixing sleeve can be smoothly assembled with the first iron core segment, the multiple first retainers and the multiple first permanent magnets. This is conducive to improving the assembly efficiency of the fixing sleeve, the first iron core segment, the multiple first retainers and the multiple first permanent magnets, and thus helps to reduce the production cost of the rotor.

[0059] In some embodiments, the limiting portion is optionally fitted to the cover plate.

[0060] In this embodiment, the mating structure of the limiting part and the cover plate is further defined.

[0061] Specifically, the limiting part is fitted to the cover plate. This arrangement reduces the axial distance between the limiting part and the cover plate on the rotor, reduces the axial movement of the first permanent magnet on the rotor, and prevents the first permanent magnet from becoming loose.

[0062] It is understandable that when both the first end face and the second end face of the first retainer are provided with limiting portions, the limiting portion of the first end face and the cover plate at the first end face are fitted together, and the limiting portion of the second end face and the cover plate at the second end face are fitted together.

[0063] Specifically, the hot melt machine presses and melts the limiting post of the first retaining component substrate to form a limiting part, so that the limiting part and the cover plate are fitted together.

[0064] In some embodiments, optionally, the number of first core segment groups is two, and the rotor further includes: at least one second core segment group, the second core segment group including: a second core segment; a plurality of second retainers disposed on the outer peripheral side of the second core segment, and the plurality of second retainers are arranged at intervals along the circumference of the rotor, and a second mounting groove is formed between two adjacent second retainers and the second core segment; a plurality of second permanent magnets, each second permanent magnet being disposed in a second mounting groove, the second mounting groove being used to limit the second permanent magnet in the radial and circumferential directions of the rotor; wherein, at least one second core segment group is stacked between two first core segment groups, and the portion of the first retainer away from the second core segment group is provided with a limiting portion.

[0065] In this embodiment, the structure of the rotor is further defined, and the rotor also includes at least one second core segment group.

[0066] There are two first core segment groups, and at least one second core segment group is located between the two first core segment groups.

[0067] When there are multiple second core segment groups, the multiple second core segment groups are stacked between two first core segment groups.

[0068] The portion of the first retainer away from the second core segment group is provided with a limiting part, and the two first core segment groups can limit the second permanent magnet of at least one second core segment group in the axial direction of the rotor.

[0069] Furthermore, any one of the plurality of second retaining members is disposed on the outer periphery of the second core segment, and a second mounting groove is formed between two adjacent second retaining members and the second core segment; that is, the plurality of second retaining members and the second core segment form a plurality of second mounting grooves. Each second mounting groove is provided with a second permanent magnet. The shape of the second permanent magnet matches the shape of the second mounting groove.

[0070] In other words, the two first core segments, the second core segment, and multiple second retaining members cooperate to secure and limit multiple second permanent magnets in the circumferential, radial, and axial directions of the rotor, ensuring that the second permanent magnets are firmly assembled onto the second core segment. This prevents the second permanent magnets from becoming loose due to assembly errors, guarantees the assembly dimensions of the second permanent magnets and the second core segment, effectively increases the reliability of the motor, and suppresses motor noise.

[0071] In some embodiments, optionally, the first retainer includes: a connecting segment having a first wall and a second wall disposed opposite to each other in the radial direction of the rotor, the first wall being located between the center of the rotor and the second wall, the first wall being disposed in contact with the radial outer surface of two adjacent first permanent magnets; and a connecting segment extending from the connecting segment toward the center of the rotor, the connecting segment being sandwiched between two adjacent first permanent magnets, the first core segment having a groove, and the end of the connecting segment being inserted into the groove.

[0072] In this embodiment, the structure of the first retainer is further defined.

[0073] The first retaining element includes a connecting section and a connecting section.

[0074] The connecting section extends from the connecting section toward the center of the rotor. The end of the connecting section opposite to the connecting section is inserted into the groove.

[0075] Along the radial direction of the rotor, the first retainer includes a first wall and a second wall, which are disposed opposite to each other. The first wall is located between the center of the rotor and the second wall.

[0076] A first mounting groove is formed between the first wall surface, connecting section and first core section of two adjacent first retainers, and the second wall surfaces of two adjacent first retainers are arranged at intervals.

[0077] The first wall surface is set to fit the radial outer surface of two adjacent first permanent magnets, and the connecting section is sandwiched between two adjacent first permanent magnets. The connecting section, the first iron core section and the connecting section cooperate to limit the first permanent magnets in the circumferential and radial directions of the rotor, so as to ensure the matching dimensions of multiple first permanent magnets and the first iron core section.

[0078] It is understandable that the first wall and the side wall of the connecting section extend in different directions. The side of the first wall and the connecting section are slots that engage with the outer surface of the first permanent magnet to limit the first permanent magnet between the first iron core section and the first retainer.

[0079] The shape of the second retainer is the same as that of the first retainer.

[0080] Specifically, the second retaining element includes a connecting section and a connecting section.

[0081] The connecting section extends towards the center of the rotor. The end of the connecting section opposite to the connecting section is inserted into the groove.

[0082] Along the radial direction of the rotor, the second retainer includes a first wall and a second wall, which are disposed opposite to each other. The first wall is located between the center of the rotor and the second wall.

[0083] A second mounting groove is formed between the first wall surface, the connecting section, and the second core section of two adjacent second retainers, and the second wall surfaces of two adjacent second retainers are arranged at intervals.

[0084] The first wall surface is set to fit the radial outer surface of two adjacent second permanent magnets, and the connecting section is sandwiched between two adjacent second permanent magnets. The connecting section, the second iron core section and the connecting section cooperate to limit the second permanent magnets in the circumferential and radial directions of the rotor, so as to ensure the matching dimensions of multiple second permanent magnets and the second iron core section.

[0085] It is understandable that the first wall and the side wall of the connecting section extend in different directions. The side of the first wall and the connecting section are slots that engage with the outer surface of the second permanent magnet to limit the second permanent magnet between the second iron core section and the second retainer.

[0086] In some embodiments, the shape of the end of the connecting segment is the same as the shape of the groove, and the cross-sectional area of ​​the bottom of the groove is greater than the cross-sectional area of ​​the area enclosed by the groove opening; wherein the groove penetrates the first iron core segment along the axial direction of the rotor.

[0087] In this embodiment, the mating structure of the connecting section and the first iron core section is further defined.

[0088] The first core section has a groove, and the end of the connecting section is inserted into the groove. The shape of the end of the connecting section is the same as the shape of the groove.

[0089] In this design, the cross-sectional area of ​​the bottom of the groove is larger than the cross-sectional area of ​​the area enclosed by the opening of the groove. That is, the groove is a groove-shaped structure with a small opening and a large bottom. When the end of the connecting section is inserted into the groove, it can limit the first retaining member radially along the first iron core section and circumferentially along the first iron core section, so that the first permanent magnet is effectively limited and the displacement of the first permanent magnet relative to the first iron core section is prevented.

[0090] In addition, the groove of the first retainer extends through the first core section along the rotor's axial direction. This arrangement allows for effective assembly of the first retainer and the first core section, offering advantages in ease of operation and improving assembly efficiency and feasibility.

[0091] In some embodiments, the limiting portion may be a resin limiting portion, which is formed by melt molding.

[0092] In this embodiment, the material of the limiting part is further defined so that the limiting part is a resin limiting part. In this way, the hot melt machine can press melt the limiting column to form the limiting part by pressing, so that the limiting part can limit the first permanent magnet in the axial direction of the rotor.

[0093] In some embodiments, the number of limiting parts may optionally be N, where 2 ≤ N ≤ 10, and N is an even number.

[0094] In this embodiment, the number of limiting parts is further limited, such that the number of limiting parts is denoted as N, where 2≤N≤10, and N is an even number. For example, the number of limiting parts includes 4, 6, and 8.

[0095] Specifically, when the motor is a 12-slot 8-pole motor, the number of limit parts is 8.

[0096] Specifically, when the motor is a 12-slot, 10-pole motor, the number of limiting parts is 10, and each first retaining member is provided with a limiting part.

[0097] The second aspect of this application provides for an electric motor, comprising: a rotor as described in the first aspect.

[0098] The motor provided in this application includes a rotor as described in the first aspect, and therefore has all the beneficial effects of the rotor described above, which will not be described in detail here.

[0099] A third aspect of this application proposes a steering system comprising: a rotor as in the first aspect; or an electric motor as in the second aspect.

[0100] The steering system provided in this application, because it includes a rotor as described in the first aspect or a motor as described in the second aspect, has all the beneficial effects of the aforementioned rotor or motor, which will not be described in detail here.

[0101] The fourth aspect of this application proposes a vehicle comprising: an electric motor as in the second aspect; or a steering system as in the third aspect.

[0102] The vehicle provided in this application, because it includes a motor as described in the second aspect or a steering system as described in the third aspect, has all the beneficial effects of the aforementioned motor or steering system, which will not be described in detail here.

[0103] It is worth noting that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.

[0104] The vehicles can also be gasoline-powered cars and hybrid cars.

[0105] The fifth aspect of this application discloses a method for manufacturing a rotor for manufacturing the rotor of the first aspect. The method for manufacturing the rotor includes: placing a plurality of first permanent magnets and a plurality of first retainer substrates along the circumference of the rotor on the outer periphery of a first core segment; and using a hot melt machine to press-melt the first retainer substrates to form a first core segment assembly, so that the limiting portion limits the first permanent magnets in the axial direction of the rotor.

[0106] This application specifies the detailed steps of the rotor preparation method.

[0107] Multiple first permanent magnets and multiple first retainer substrates are placed circumferentially on the outer periphery of the first core segment. The multiple first retainers are arranged at intervals circumferentially along the rotor, with adjacent first retainers and first core segments forming first mounting slots; that is, the multiple first retainers and first core segments form multiple first mounting slots. Each first mounting slot is provided with a first permanent magnet. The shape of the first permanent magnet matches the shape of the first mounting slot.

[0108] Multiple first retainer substrates and multiple first permanent magnets are assembled circumferentially on the outer periphery of the first core segment. The first retainer substrates are then melted using a hot melt machine to form a first core segment assembly, so that the limiting portion of the first retainer limits the first permanent magnets axially on the rotor. It is understood that the first mounting groove is used to limit the first permanent magnets radially and circumferentially on the rotor, and the limiting portion protrudes from the axial end face of the first core segment, thus limiting the first permanent magnets axially on the rotor.

[0109] In other words, the first iron core segment cooperates with multiple first retaining members to fasten and limit multiple first permanent magnets in the circumferential, radial, and axial directions of the rotor, so that the first permanent magnets are securely assembled onto the first iron core segment. This avoids the possibility of multiple first permanent magnets becoming loose due to assembly errors, ensures the assembly dimensions of the first permanent magnets and the first iron core segment, effectively increases the reliability of the motor, and suppresses motor noise.

[0110] In some embodiments, the step of using a hot melt machine to press-melt the first retainer substrate to form the first core segment group specifically includes: using a hot melt machine to press-melt the limiting post of the first retainer substrate to form a limiting portion, and making the limiting portion fit against the axial end faces of two adjacent first permanent magnets.

[0111] In this embodiment, the step of using a hot melt machine to press-melt the first retainer substrate to form the first core segment assembly is further defined.

[0112] The limiting post of the first retaining component substrate is pressed and melted by the hot melt machine to form a limiting part, so that the limiting part and the axial end face of the two adjacent first permanent magnets are fitted together.

[0113] This design reduces the axial spacing between the limiting part and the two first permanent magnets on the rotor, thereby reducing the axial movement of the first permanent magnets on the rotor and preventing the first permanent magnets from becoming loose.

[0114] It is understandable that when both the first end face and the second end face of the first retainer are provided with limiting portions, the limiting portion of the first end face is fitted with the axial end faces of the two adjacent first permanent magnets, and the limiting portion of the second end face is fitted with the axial end faces of the two adjacent first permanent magnets.

[0115] In some embodiments, optionally, before the step of using a hot melt machine to press-melt the first retainer substrate to form the first core segment group, the method further includes: fitting a rotor fixing sleeve on the outside of the plurality of first retainer substrates and allowing the limiting post of the first retainer substrate to pass through the connecting hole of the fixing sleeve; using a hot melt machine to press-melt the limiting post to form a limiting portion and fitting the limiting portion to the cover plate of the fixing sleeve.

[0116] In this embodiment, the step of using a hot melt machine to press-melt the first retainer substrate to form the first core segment assembly is further defined.

[0117] A rotor fixing sleeve is sleeved on the outside of multiple first retaining substrates. The limiting post of the first retaining substrate extends out of the outer surface of the cover plate through the connecting hole. The limiting post is pressed and melted by a hot melt machine to form a limiting part. The part of the limiting part outside the cover plate blocks the connecting hole. The limiting part will not separate from the fixing sleeve through the connecting hole, which can meet the use requirements of effectively limiting the first permanent magnet in the axial direction of the rotor.

[0118] It is understandable that the portion of the limiting part located outside the cover plate blocks the connecting hole, and the outer peripheral wall of the limiting part is located outside the hole wall of the connecting hole. In other words, the portion of the limiting part located outside the cover plate covers the connecting hole.

[0119] In addition, the retaining plate and cover plate of the fixing sleeve cooperate to limit the first permanent magnet in the radial direction, circumferential direction and axial direction of the rotor. The fixing sleeve has the function of protecting the first permanent magnet and collecting the debris of the first permanent magnet, and provides structural support to ensure the performance of the motor.

[0120] Understandably, the limiting part is closer to the center of the rotor than the outer surface of the enclosure plate; that is, the limiting part and the outer surface of the enclosure plate are spaced apart. In other words, there is a gap between the limiting part and the outer surface of the enclosure plate. Therefore, the limiting part will not protrude beyond the outer surface of the enclosure plate, thus not affecting the stator-rotor clearance of the motor, preventing interference with the stator, and ensuring the normal operation of the motor.

[0121] In addition, the fixed sleeve and the limiting part work together to position the fixed sleeve in the radial and circumferential directions of the rotor, preventing the fixed sleeve from becoming misaligned.

[0122] It is understandable that when both the first end face and the second end face are provided with limiting parts, there are two fixing sleeves, and each fixing sleeve cooperates with a limiting part.

[0123] When both the first and second end faces are provided with limiting parts, that is, when the rotor includes a first core segment group, the first end face is provided with a limiting part and the second end face is provided with a limiting part. In this case, there are two fixing sleeves, and each fixing sleeve cooperates with a limiting part.

[0124] This configuration allows the limiting portions on both sides of the first retainer and the two fixing sleeves to effectively limit the first permanent magnet in the axial direction of the rotor, preventing the first permanent magnet from becoming loose.

[0125] In some embodiments, the method of manufacturing the rotor may optionally include: assembling at least one second core segment group of the rotor between two first core segment groups.

[0126] In this embodiment, when the rotor includes two first core segment groups and at least one second core segment group, the at least one second core segment group of the rotor is assembled between the two first core segment groups.

[0127] The portion of the first retainer away from the second core segment group is provided with a limiting part, and the two first core segment groups can limit the second permanent magnet of at least one second core segment group in the axial direction of the rotor.

[0128] Furthermore, any one of the plurality of second retaining members is disposed on the outer periphery of the second core segment, and a second mounting groove is formed between two adjacent second retaining members and the second core segment; that is, the plurality of second retaining members and the second core segment form a plurality of second mounting grooves. Each second mounting groove is provided with a second permanent magnet. The shape of the second permanent magnet matches the shape of the second mounting groove.

[0129] In other words, the two first core segments, the second core segment, and multiple second retaining members cooperate to secure and limit multiple second permanent magnets in the circumferential, radial, and axial directions of the rotor, ensuring that the second permanent magnets are firmly assembled onto the second core segment. This prevents the second permanent magnets from becoming loose due to assembly errors, guarantees the assembly dimensions of the second permanent magnets and the second core segment, effectively increases the reliability of the motor, and suppresses motor noise.

[0130] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0131] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0132] Figure 1 A first-view structural schematic diagram of the rotor of the first embodiment of this application is shown;

[0133] Figure 2 A partial structural schematic diagram of the rotor of the first embodiment of this application is shown;

[0134] Figure 3 A second-view structural schematic diagram of the rotor of the first embodiment of this application is shown;

[0135] Figure 4 This invention provides a schematic diagram of the rotor of the first embodiment of the rotor before pressure melting, shown from a first-view perspective.

[0136] Figure 5 This invention provides a schematic diagram of the rotor of the first embodiment of the rotor before pressure melting, shown from a second perspective.

[0137] Figure 6 A first-view structural schematic diagram of the rotor of the second embodiment of this application is shown;

[0138] Figure 7 A second-view structural schematic diagram of the rotor of the second embodiment of this application is shown;

[0139] Figure 8 A third-view structural schematic diagram of the rotor of the second embodiment of this application is shown;

[0140] Figure 9 A first-view structural schematic diagram of the rotor of the second embodiment of this application before pressure melting is shown;

[0141] Figure 10 A second-view structural schematic diagram of the rotor of the second embodiment of this application before pressure melting is shown;

[0142] Figure 11 A third-view structural schematic diagram of the rotor of the second embodiment of this application before pressure melting is shown;

[0143] Figure 12 A first-view structural schematic diagram of the rotor of the third embodiment of this application is shown;

[0144] Figure 13 A second-view structural schematic diagram of the rotor of the third embodiment of this application is shown;

[0145] Figure 14 A third-view structural schematic diagram of the rotor of the third embodiment of this application is shown;

[0146] Figure 15 A first-view structural schematic diagram of the rotor of the third embodiment of this application before pressure melting is shown;

[0147] Figure 16 A second-view structural schematic diagram of the rotor of the third embodiment of this application before pressure melting is shown;

[0148] Figure 17 The diagram shows a third-view structural schematic of the rotor of the third embodiment of this application before pressure melting;

[0149] Figure 18 A first-view structural schematic diagram of the rotor of the fourth embodiment of this application is shown;

[0150] Figure 19 A second-view structural schematic diagram of the rotor of the fourth embodiment of this application is shown;

[0151] Figure 20 This invention provides a schematic diagram of the rotor of the fourth embodiment of the rotor before pressure melting, shown from a first-view perspective.

[0152] Figure 21 This invention provides a schematic diagram of the rotor of the fourth embodiment of the rotor before pressure melting, shown from a second perspective.

[0153] Figure 22 A first-view structural schematic diagram of the rotor of the fifth embodiment of this application is shown;

[0154] Figure 23 A second-view structural schematic diagram of the rotor of the fifth embodiment of this application is shown;

[0155] Figure 24 A third-view structural schematic diagram of the rotor of the fifth embodiment of this application is shown;

[0156] Figure 25 This invention provides a first-view structural schematic diagram of the rotor of the fifth embodiment of the rotor before pressure melting.

[0157] Figure 26 This invention provides a schematic diagram of the rotor of the fifth embodiment of the rotor before pressure melting, shown from a second perspective.

[0158] Figure 27 This invention provides a third-view structural schematic diagram of the rotor of the fifth embodiment of the rotor before pressure melting.

[0159] Figure 28 A first-view structural schematic diagram of the rotor of the sixth embodiment of this application is shown;

[0160] Figure 29 A second-view structural schematic diagram of the rotor of the sixth embodiment of this application is shown;

[0161] Figure 30 A third-view structural schematic diagram of the rotor of the sixth embodiment of this application is shown;

[0162] Figure 31 This invention provides a schematic diagram of the rotor of the sixth embodiment of the rotor before pressure melting, shown from a first-view perspective.

[0163] Figure 32This invention provides a schematic diagram of the rotor of the sixth embodiment of the rotor before pressure melting, shown from a second perspective.

[0164] Figure 33 This invention provides a third-view structural schematic diagram of the rotor of the sixth embodiment of the rotor before pressure melting.

[0165] Figure 34 This is a schematic flowchart of a rotor manufacturing method according to an embodiment of this application.

[0166] in, Figures 1 to 33 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0167] 10 Rotor, 100 First core segment group, 110 First core segment, 120 First retainer, 122 First end face, 124 Second end face, 130 First mounting groove, 140 Limiting part, 150 First permanent magnet, 160 Fixing sleeve, 162 Enclosure plate, 164 Cover plate, 166 Connecting hole, 200 Second core segment group, 300 Connecting section, 310 First wall surface, 320 Second wall surface, 400 Connecting section, 500 Groove, 600 Rotating shaft, 700 First retainer base material, 800 Limiting post. Detailed Implementation

[0168] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0169] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0170] The following reference Figures 1 to 34 Rotor 10, motor, steering system and vehicle according to some embodiments of this application.

[0171] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18 , Figure 19 , Figure 20 , Figure 21 , Figure 22 , Figure 23 , Figure 24 , Figure 25 , Figure 26 , Figure 27 , Figure 28 , Figure 29 , Figure 30 , Figure 31 , Figure 32 and Figure 33 As shown, a rotor 10 according to some embodiments of this application includes a first core segment group 100.

[0172] The first core segment group 100 includes a first core segment 110, a plurality of first retaining members 120 and a plurality of first permanent magnets 150.

[0173] Multiple first retaining members 120 are disposed on the outer periphery of the first iron core section 110.

[0174] Furthermore, multiple first retaining members 120 are arranged at intervals along the circumference of the rotor 10.

[0175] The first mounting groove 130 is formed between two adjacent first retaining members 120 and the first iron core segment 110.

[0176] The first retaining member 120 is provided with a limiting part 140.

[0177] Each first permanent magnet 150 is disposed in a first mounting slot 130.

[0178] The first mounting slot 130 is used to position the first permanent magnet 150 in the radial and circumferential directions of the rotor 10.

[0179] The limiting part 140 protrudes from the axial end face of the first iron core section 110.

[0180] The limiting part 140 is used to limit the first permanent magnet 150 in the axial direction of the rotor 10.

[0181] The rotor 10 provided in this application includes a first core segment group 100, which includes a first core segment 110, a plurality of first retaining members 120 and a plurality of first permanent magnets 150.

[0182] Any one of the plurality of first retaining members 120 is disposed on the outer periphery of the first core segment 110, and a first mounting groove 130 is formed between two adjacent first retaining members 120 and the first core segment 110, that is, the plurality of first retaining members 120 and the first core segment 110 form a plurality of first mounting grooves 130. Each first mounting groove 130 is provided with a first permanent magnet 150. The shape of the first permanent magnet 150 matches the shape of the first mounting groove 130.

[0183] Multiple first retainer substrates 700 and multiple first permanent magnets 150 are assembled circumferentially on the outer periphery of the first core segment 110 along the rotor 10. The first retainer substrates 700 are then melted using a hot melt machine to form a first core segment assembly 100, so that the limiting portion 140 of the first retainer 120 limits the first permanent magnets 150 in the axial direction of the rotor 10. It is understood that the first mounting groove 130 is used to limit the first permanent magnets 150 in the radial and circumferential directions of the rotor 10, and the limiting portion 140 protrudes from the axial end face of the first core segment 110, and the limiting portion 140 is used to limit the first permanent magnets 150 in the axial direction of the rotor 10.

[0184] In other words, the first core segment 110 cooperates with multiple first retaining members 120 to fasten and limit multiple first permanent magnets 150 in the circumferential, radial, and axial directions of the rotor 10, so that the first permanent magnets 150 are securely assembled onto the first core segment 110. This avoids the possibility of multiple first permanent magnets 150 becoming loose due to assembly errors, ensures the assembly dimensions of the first permanent magnets 150 and the first core segment 110, effectively increases the reliability of the motor, and suppresses motor noise.

[0185] In some embodiments, optionally, the axial end face of the first retainer 120 is provided with a limiting portion 140.

[0186] In this embodiment, the structure of the first retainer 120 is further defined such that a limiting portion 140 is provided on the axial end face of the first retainer 120. This configuration not only satisfies the requirement of the limiting portion 140 to limit the first permanent magnet 150 in the axial direction of the rotor 10, but also avoids increasing the radial dimension of the rotor 10. This ensures the fit dimensions between the stator and the rotor 10 of the motor, avoids interference between the rotor 10 and the stator, and provides reliable structural support to ensure the performance of the motor.

[0187] In some embodiments, optionally, such as Figures 1 to 3 As shown, along the axial direction of the rotor 10, the first retainer 120 has a first end face 122 and a second end face 124 disposed opposite to each other.

[0188] At least one of the first end face 122 and the second end face 124 is provided with a limiting portion 140.

[0189] In this embodiment, the structure of the first retainer 120 is further defined.

[0190] Along the axial direction of the rotor 10, the first retainer 120 has a first end face 122 and a second end face 124. That is, the first retainer 120 has a first end face 122 and a second end face 124 disposed opposite to each other in the axial direction of the rotor 10.

[0191] The first end face 122 is provided with a limiting part 140, or the second end face 124 is provided with a limiting part 140, or both the first end face 122 and the second end face 124 are provided with limiting parts.

[0192] That is, the number and position of the limiting parts 140 can be set according to the number of the first core segment group 100 to meet the usage requirements of various types of rotors 10.

[0193] In some embodiments, optionally, such as Figures 1 to 3 , Figures 6 to 8 , Figures 12 to 14 As shown, in the limiting part 140 and the two adjacent first permanent magnets 150, the first part of the limiting part 140 overlaps with one of the first permanent magnets 150, and the second part of the limiting part 140 overlaps with the other first permanent magnet 150.

[0194] The limiting part 140 is closer to the center of the rotor 10 than the radial outer surface of the first permanent magnet 150.

[0195] In this embodiment, the mating structure of the first retainer 120 and the two first permanent magnets 150 adjacent to the first retainer is further defined.

[0196] Specifically, along the axial direction of the rotor 10, the first portion of the limiting portion 140 overlaps with one first permanent magnet 150, and the second portion of the limiting portion 140 overlaps with another first permanent magnet 150. That is, the first portion of the limiting portion 140 limits one first permanent magnet 150 along the axial direction of the rotor 10, and the second portion of the limiting portion 140 limits another first permanent magnet 150 along the axial direction of the rotor 10. This arrangement allows one limiting portion 140 to limit two adjacent first permanent magnets 150, preventing the first permanent magnets 150 from becoming loose along the axial direction of the rotor 10.

[0197] It is understandable that the limiting part 140 is located on the same side of the two adjacent first permanent magnets 150.

[0198] Furthermore, the limiting portion 140 is closer to the center of the rotor 10 than the radial outer surface of the first permanent magnet 150. That is, the limiting portion 140 and the radial outer surface of the first permanent magnet 150 are arranged at a distance. In other words, there is a gap between the limiting portion 140 and the radial outer surface of the first permanent magnet 150. Therefore, the limiting portion 140 does not protrude beyond the radial outer surface of the first permanent magnet 150, thus not affecting the stator-rotor clearance of the motor, preventing interference with the stator, and ensuring the normal operation of the motor.

[0199] In some embodiments, the limiting portion 140 and the two adjacent first permanent magnets 150 are optionally fitted together.

[0200] In this embodiment, the cooperation structure between the limiting part 140 and the two adjacent first permanent magnets 150 is further defined.

[0201] Specifically, the limiting part 140 and the two adjacent first permanent magnets 150 are fitted together on their axial end faces. This arrangement reduces the axial distance between the limiting part 140 and the two first permanent magnets 150 on the rotor 10, reduces the amount of axial movement of the first permanent magnets 150 on the rotor 10, and prevents the first permanent magnets 150 from becoming loose.

[0202] It is understandable that when both the first end face 122 and the second end face 124 of the first retainer 120 are provided with limiting portions 140, the limiting portion 140 of the first end face 122 and the axial end faces of the two adjacent first permanent magnets 150 are fitted together, and the limiting portion 140 of the second end face 124 and the axial end faces of the two adjacent first permanent magnets 150 are fitted together.

[0203] Specifically, the limiting post 800 of the first retaining member substrate 700 is melted by a hot melt machine to form a limiting part 140, so that the limiting part 140 and the axial end faces of the two adjacent first permanent magnets 150 are fitted together.

[0204] In some embodiments, optionally, such as Figures 1 to 3 As shown, when the rotor 10 includes a first core segment group 100, both the first end face 122 and the second end face 124 are provided with limiting parts 140.

[0205] In this embodiment, the structure of the rotor 10 is further defined.

[0206] When the rotor 10 includes a first core segment group 100, the first retaining member 120 has a first end face 122 and a second end face 124 disposed opposite to each other in the axial direction of the rotor 10, and both the first end face 122 and the second end face 124 are provided with a limiting portion 140. In the limiting portion 140 located on the first end face 122 and the two adjacent first permanent magnets 150, the first part of the limiting portion 140 overlaps with one first permanent magnet 150, and the second part of the limiting portion 140 overlaps with the other first permanent magnet 150. In the limiting portion 140 located on the second end face 124 and the two adjacent first permanent magnets 150, the first part of the limiting portion 140 overlaps with one first permanent magnet 150, and the second part of the limiting portion 140 overlaps with the other first permanent magnet 150. That is, the limiting portions 140 on both sides of the first retaining member 120 can effectively limit the first permanent magnet 150 in the axial direction of the rotor 10, so as to prevent the first permanent magnet 150 from becoming loose.

[0207] When the rotor 10 includes a first core segment group 100, if a limiting portion 140 is provided on one axial end face of the first retainer 120, that is, the first end face 122 of the first retainer 120 is provided with a limiting portion 140, or the second end face 124 of the first retainer 120 is provided with a limiting portion 140, then the first permanent magnet 150 will loosen to the side where the limiting portion 140 is not provided. This will reduce the reliability of the motor and increase the noise of the motor.

[0208] In some embodiments, optionally, such as Figures 6 to 8 As shown, when the rotor 10 includes two first core segment groups 100, the first core segments 110 of the two first core segment groups 100 are arranged opposite to each other, the first end faces 122 of the two first core segment groups 100 are arranged opposite to each other, and the second end face 124 of the first retainer 120 is provided with a limiting part 140.

[0209] In this embodiment, the structure of the rotor 10 is further defined.

[0210] When the rotor 10 includes two first core segment groups 100, after the two first core segment groups 100 are assembled, the first core segments 110 of the two first core segment groups 100 are arranged opposite each other, the first end faces 122 of the two first core segment groups 100 are arranged opposite each other, and the second end face 124 of the first retainer 120 is provided with a limiting portion 140. That is, the first retainer 120 of each first core segment group 100 is only provided with a limiting portion 140 at the second end face 124, and the first retainer 120 of each first core segment group 100 is not provided with a limiting portion 140 on the first end face 122. The two first core segment groups 100 cooperate to fasten and limit the plurality of first permanent magnets 150 in the circumferential, radial and axial directions of the rotor 10.

[0211] If both the first end face 122 and the second end face 124 of the first retainer 120 are provided with limiting portions 140, the limiting portions 140 at the first end face 122 of the two first core segment groups 100 will interfere with each other.

[0212] In some embodiments, optionally, such as Figures 18 to 33 As shown, the first core segment group 100 also includes a fixing sleeve 160, which includes a surrounding plate 162 and a cover plate 164.

[0213] The enclosure 162 is disposed around the outer periphery of the plurality of first retaining members 120.

[0214] The cover plate 164 is located on one end face of the enclosure plate 162.

[0215] The cover plate 164 is provided with a connecting hole 166.

[0216] The wall of the connecting hole 166 surrounds the periphery of the limiting part 140.

[0217] A portion of the limiting part 140 is located outside the cover plate 164, and the portion of the limiting part 140 located outside the cover plate 164 blocks the connecting hole 166.

[0218] The limiting part 140 is closer to the center of the rotor 10 than the outer surface of the enclosure 162.

[0219] The limiting part 140 limits the first permanent magnet 150 in the axial direction of the rotor 10 through the fixing sleeve 160.

[0220] In this embodiment, the structure of the first core segment group 100 is further defined such that the first core segment group 100 also includes a fixing sleeve 160, and the limiting part 140 limits the first permanent magnet 150 through the fixing sleeve 160.

[0221] Specifically, the fixing sleeve 160 includes a surrounding plate 162 and a cover plate 164. The surrounding plate 162 surrounds the outer periphery of the plurality of first retaining members 120, and the cover plate 164 is located on one end face of the surrounding plate 162. The cover plate 164 is provided with a connecting hole 166. The limiting post 800 extends out of the outer surface of the cover plate 164 through the connecting hole 166, so that a part of the limiting post 800 is located outside the cover plate 164. The limiting post 800 located outside the cover plate 164 is press-melted by a hot melt machine to form a limiting part 140. The part of the limiting part 140 located outside the cover plate 164 blocks the connecting hole 166. The limiting part 140 will not separate from the fixing sleeve 160 through the connecting hole 166, which can meet the usage requirements of effectively limiting the first permanent magnet 150 in the axial direction of the rotor 10.

[0222] It is understandable that the portion of the limiting part 140 outside the cover plate 164 blocks the connecting hole 166, and the outer peripheral wall of the limiting part 140 is located outside the hole wall of the connecting hole 166. In other words, the portion of the limiting part 140 outside the cover plate 164 covers the connecting hole 166.

[0223] In addition, the enclosure plate 162 and the cover plate 164 cooperate to limit the first permanent magnet 150 in the radial direction, circumferential direction and axial direction of the rotor 10. The fixing sleeve 160 has the function of protecting the first permanent magnet 150 and collecting the debris of the first permanent magnet 150, and provides structural support to ensure the performance of the motor.

[0224] Understandably, the limiting part 140 is closer to the center of the rotor 10 than the outer surface of the surrounding plate 162; that is, the limiting part 140 and the outer surface of the surrounding plate 162 are arranged at a distance. In other words, there is a gap between the limiting part 140 and the outer surface of the surrounding plate 162. Therefore, the limiting part 140 will not protrude beyond the outer surface of the surrounding plate 162, thus not affecting the stator-rotor clearance of the motor, not interfering with the stator, and ensuring the normal operation of the motor.

[0225] In addition, the fixed sleeve 160 and the limiting part 140 cooperate to position the fixed sleeve 160 in the radial direction and circumferential direction of the rotor 10, preventing the fixed sleeve 160 from being misaligned.

[0226] In some embodiments, optionally, such as Figure 18 and Figure 19 As shown, when the rotor 10 includes a first core segment group 100, the first end face 122 and the second end face 124 are both provided with limiting parts 140, and the number of fixing sleeves 160 is two. Each fixing sleeve 160 cooperates with a limiting part 140, and the two fixing sleeves 160 are arranged abutting or spaced apart in the axial direction of the rotor 10.

[0227] In this embodiment, the structure of the rotor 10 is further defined.

[0228] When the rotor 10 includes a first core segment assembly 100, the first retaining member 120 has a first end face 122 and a second end face 124 disposed opposite to each other in the axial direction of the rotor 10. Both the first end face 122 and the second end face 124 are provided with limiting portions 140. The rotor 10 includes two fixing sleeves 160. The limiting portion 140 at the first end face 122 limits the first permanent magnet 150 in the axial direction of the rotor 10 through one fixing sleeve 160, and the limiting portion 140 at the second end face 124 limits the first permanent magnet 150 in the axial direction of the rotor 10 through another fixing sleeve 160, so as to prevent the first permanent magnet 150 from becoming loose.

[0229] In addition, the two fixing sleeves 160 are arranged abutting or spaced apart in the axial direction of the rotor 10. In this way, the two fixing sleeves 160 will not interfere with each other in the axial direction of the rotor 10.

[0230] In some embodiments, optionally, such as Figures 22 to 24 As shown, when the rotor 10 includes two first core segment groups 100, the first core segments 110 of the two first core segment groups 100 are arranged opposite each other, the first end faces 122 of the two first core segment groups 100 are arranged opposite each other, the second end face 124 of the first retainer 120 is provided with a limiting part 140, each first core segment group 100 includes a fixing sleeve 160, and the fixing sleeves 160 of the two first core segment groups 100 are arranged abutting or spaced apart in the axial direction of the rotor 10.

[0231] In this embodiment, the structure of the rotor 10 is further defined.

[0232] When the rotor 10 includes two first core segment groups 100, each first core segment group 100 includes a fixing sleeve 160. After the two first core segment groups 100 are assembled, the first core segments 110 of the two first core segment groups 100 are arranged opposite each other, the first end faces 122 of the two first core segment groups 100 are arranged opposite each other, and the second end face 124 of the first retainer 120 is provided with a limiting portion 140. That is, the first retainer 120 of each first core segment group 100 is only provided with a limiting portion 140 at the second end face 124, and the first retainer 120 of each first core segment group 100 is not provided with a limiting portion 140 on the first end face 122. The two first core segment groups 100 cooperate to fasten and limit a plurality of first permanent magnets 150 in the circumferential, radial and axial directions of the rotor 10.

[0233] In addition, the fixing sleeves 160 of the two first core segment groups 100 are arranged abutting or spaced apart in the axial direction of the rotor 10. In this way, after the two first core segment groups 100 are assembled, the fixing sleeves 160 of the two first core segment groups 100 will not interfere with each other in the axial direction of the rotor 10.

[0234] In some embodiments, the fixing sleeve 160 may be a non-magnetic metal sleeve; the thickness of the fixing sleeve 160 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0235] In this embodiment, the structure of the fixing sleeve 160 is further defined such that the fixing sleeve 160 is a non-magnetic metal sleeve, the fixing sleeve 160 is a metal material that will not cause significant magnetization under the action of a magnetic field, and the magnetic permeability of the fixing sleeve 160 is low, so it will not affect the operating parameters of the motor.

[0236] Optionally, the retaining sleeve 160 may include a stainless steel sleeve, an aluminum alloy sleeve, or a titanium alloy sleeve.

[0237] In this embodiment, the structure of the fixing sleeve 160 is further defined such that the thickness of the fixing sleeve 160 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm. This configuration ensures the effectiveness and feasibility of fixing the multiple first permanent magnets 150 and the first iron core segment 110 with the fixing sleeve 160, while also ensuring the overall external dimensions of the rotor 10 and the overall dimensions of the motor.

[0238] Optionally, the thickness of the fixing sleeve 160 includes 0.2mm, 0.3mm and 0.4mm, etc., which will not be listed here.

[0239] In some embodiments, optionally, either the first retainer 120 or the first permanent magnet 150 has a gap between it and the inner surface of the enclosure 162.

[0240] In this embodiment, the mating structure of the fixing sleeve 160, the first retainer 120 and the first permanent magnet 150 is further defined.

[0241] There is a gap between either the first retainer 120 or the first permanent magnet 150 and the inner surface of the enclosure 162. There is a gap between the first retainer 120 and the inner surface of the enclosure 162, and there is a gap between the first permanent magnet 150 and the inner surface of the enclosure 162. The first retainer 120 and the inner surface of the enclosure 162 are not fitted together, and the first permanent magnet 150 and the inner surface of the enclosure 162 are not fitted together.

[0242] This configuration not only ensures the effectiveness of the multiple first retaining members 120 in fixing the first permanent magnet 150 between the first retaining member 120 and the first iron core segment 110, but also reduces the machining accuracy requirements of the multiple first retaining members 120 and the multiple first permanent magnets 150. It can also reduce the resistance when assembling the fixing sleeve 160, so that the fixing sleeve 160 can be smoothly assembled with the first iron core segment 110, the multiple first retaining members 120 and the multiple first permanent magnets 150. This is conducive to improving the assembly efficiency of the fixing sleeve 160, the first iron core segment 110, the multiple first retaining members 120 and the multiple first permanent magnets 150, and thus helps to reduce the production cost of the rotor 10.

[0243] In some embodiments, the limiting portion 140 is optionally fitted to the cover plate 164.

[0244] In this embodiment, the mating structure of the limiting part 140 and the cover plate 164 is further defined.

[0245] Specifically, the limiting part 140 is fitted to the cover plate 164. This arrangement reduces the axial distance between the limiting part 140 and the cover plate 164 on the rotor 10, reduces the amount of axial movement of the first permanent magnet 150 on the rotor 10, and prevents the first permanent magnet 150 from becoming loose.

[0246] It is understandable that when both the first end face 122 and the second end face 124 of the first retainer 120 are provided with limiting portions 140, the limiting portion 140 of the first end face 122 and the cover plate 164 at the first end face 122 are fitted together, and the limiting portion 140 of the second end face 124 and the cover plate 164 at the second end face 124 are fitted together.

[0247] Specifically, the limiting post 800 of the first retaining member substrate 700 is pressed and melted by the hot melt machine to form a limiting part 140, so that the limiting part 140 and the cover plate 164 are fitted together.

[0248] In some embodiments, optionally, such as Figures 12 to 14 As shown, there are two first core segment groups 100.

[0249] The rotor 10 also includes at least one second core segment group 200.

[0250] The second core segment group 200 includes a second core segment, multiple second retaining elements, and multiple second permanent magnets.

[0251] Multiple second retaining elements are provided on the outer periphery of the second core section.

[0252] Furthermore, multiple second retainers are arranged at intervals along the circumference of the rotor 10.

[0253] A second mounting groove is formed between two adjacent second retaining members and the second core segment.

[0254] Each second permanent magnet is located in a second mounting slot.

[0255] The second mounting slot is used to position the second permanent magnet in the radial and circumferential directions of the rotor 10.

[0256] In this configuration, at least one second core segment group 200 is stacked between two first core segment groups 100.

[0257] The portion of the first retaining member 120 that is away from the second core segment group 200 is provided with a limiting part 140.

[0258] In this embodiment, the structure of the rotor 10 is further defined, and the rotor 10 also includes at least one second core segment group 200.

[0259] There are two first core segment groups 100, and at least one second core segment group 200 is located between the two first core segment groups 100.

[0260] When there are multiple second core segment groups 200, the multiple second core segment groups 200 are stacked between two first core segment groups 100.

[0261] The portion of the first retaining member 120 away from the second core segment group 200 is provided with a limiting part 140, and the two first core segment groups 100 can limit at least one second permanent magnet of the second core segment group 200 in the axial direction of the rotor 10.

[0262] Furthermore, any one of the plurality of second retaining members is disposed on the outer periphery of the second core segment, and a second mounting groove is formed between two adjacent second retaining members and the second core segment; that is, the plurality of second retaining members and the second core segment form a plurality of second mounting grooves. Each second mounting groove is provided with a second permanent magnet. The shape of the second permanent magnet matches the shape of the second mounting groove.

[0263] In other words, the two first core segment groups 100, the second core segment, and multiple second retaining members cooperate to fasten and limit multiple second permanent magnets in the circumferential, radial, and axial directions of the rotor 10, so that the second permanent magnets are securely assembled onto the second core segment. This avoids the possibility of multiple second permanent magnets becoming loose due to assembly errors, ensures the assembly dimensions of the second permanent magnets and the second core segment, effectively increases the reliability of the motor, and suppresses motor noise.

[0264] like Figures 28 to 30 As shown, when the limiting part 140 limits the first permanent magnet 150 in the axial direction of the rotor 10 through the fixing sleeve 160, and the rotor 10 also includes at least one second core segment group 200, the first core segments 110 of the two first core segment groups 100 are arranged opposite each other and spaced apart, the fixing sleeves 160 of the two first core segment groups 100 abut against each other or have a gap in the axial direction of the rotor 10, the first core segments 110 of the two first core segment groups 100 and the fixing sleeves 160 enclose a mounting cavity, and at least one second core segment group 200 is stacked in the mounting cavity. The second core segment group 200 includes: a second core segment; a plurality of second retainers, disposed on the outer peripheral side of the second core segment, and the plurality of second retainers are arranged spaced apart along the circumference of the rotor 10, and a second mounting groove is enclosed between two adjacent second retainers and the second core segment; a plurality of second permanent magnets, each second permanent magnet being disposed in a second mounting groove, the second mounting groove being used to limit the second permanent magnet in the radial and circumferential directions of the rotor 10.

[0265] In some embodiments, optionally, such as Figure 4 , Figure 5 , Figure 9 , Figure 11 , Figure 15 and Figure 17 As shown, the first retainer 120 includes a connecting section 300 and a connecting section 400.

[0266] The connecting section 300 has a first wall 310 and a second wall 320 arranged opposite to each other in the radial direction of the rotor 10.

[0267] The first wall surface 310 is located between the center of the rotor 10 and the second wall surface 320.

[0268] The first wall surface 310 is set to fit the radial outer surface of two adjacent first permanent magnets 150.

[0269] The connecting section 400 extends from the connecting section 300 toward the center of the rotor 10.

[0270] The connecting section 400 is sandwiched between two adjacent first permanent magnets 150.

[0271] The first core section 110 is provided with a groove 500, and the end of the connecting section 400 is inserted into the groove 500.

[0272] In this embodiment, the structures of the first retainer 120 and the second retainer are further defined.

[0273] The first retaining member 120 includes a connecting section 300 and a connecting section 400.

[0274] The connecting section 400 extends from the connecting section 300 toward the center of the rotor 10. The end of the connecting section 400 opposite to the connecting section 300 is inserted into the groove 500.

[0275] Along the radial direction of the rotor 10, the first retainer 120 includes a first wall surface 310 and a second wall surface 320, which are disposed opposite to each other. The first wall surface 310 is located between the center of the rotor 10 and the second wall surface 320.

[0276] A first mounting groove 130 is formed between the first wall surface 310, the connecting section 400 and the first core section 110 of two adjacent first retaining members 120, and the second wall surface 320 of two adjacent first retaining members 120 are arranged at intervals.

[0277] The first wall surface 310 is disposed in contact with the radial outer surface of two adjacent first permanent magnets 150, and the connecting section 400 is sandwiched between two adjacent first permanent magnets 150. The connecting section 300, the first iron core section 110 and the connecting section 400 cooperate to limit the first permanent magnets 150 in the circumferential and radial directions of the rotor 10, so as to ensure the matching dimensions of the multiple first permanent magnets 150 and the first iron core section 110.

[0278] It is understandable that the sidewalls of the first wall 310 and the connecting section 400 extend in different directions. The sidewalls of the first wall 310 and the connecting section 400 are slots that engage with the outer surface of the first permanent magnet 150 to limit the first permanent magnet 150 between the first iron core section 110 and the first retainer 120.

[0279] The shape of the second retainer is the same as that of the first retainer 120.

[0280] Specifically, the second retaining element includes a connecting section 300 and a connecting section 400.

[0281] The connecting section 400 and the connecting section 300 extend toward the center of the rotor 10. The end of the connecting section 400 opposite to the connecting section 300 is inserted into the groove 500.

[0282] Along the radial direction of the rotor 10, the second retainer includes a first wall surface 310 and a second wall surface 320, which are disposed opposite to each other. The first wall surface 310 is located between the center of the rotor 10 and the second wall surface 320.

[0283] A second mounting groove is formed between the first wall surface 310, the connecting section 400, and the second core section of two adjacent second retainers, and the second wall surfaces 320 of two adjacent second retainers are arranged at intervals.

[0284] The first wall surface 310 is disposed in contact with the radial outer surface of two adjacent second permanent magnets, and the connecting section 400 is sandwiched between two adjacent second permanent magnets. The connecting section 300, the second iron core section and the connecting section 400 cooperate to limit the second permanent magnets in the circumferential and radial directions of the rotor 10, so as to ensure the matching dimensions of multiple second permanent magnets and the second iron core section.

[0285] It is understandable that the sidewalls of the first wall 310 and the connecting section 400 extend in different directions. The sidewalls of the first wall 310 and the connecting section 400 are slots that engage with the outer surface of the second permanent magnet to limit the second permanent magnet between the second core section and the second retainer.

[0286] In some embodiments, the shape of the end of the connecting segment 400 is optionally the same as the shape of the groove 500.

[0287] The cross-sectional area of ​​the bottom of the groove 500 is greater than the cross-sectional area of ​​the area enclosed by the opening of the groove 500.

[0288] The groove 500 extends through the first core section 110 or the second core section along the axial direction of the rotor 10.

[0289] In this embodiment, the mating structure of the connecting section 400 and the first iron core section 110 is further defined, as well as the mating structure of the connecting section 400 and the second iron core section is defined.

[0290] The first core segment 110 has a groove 500, the second core segment has a groove 500, and the end of the connecting segment 400 is inserted into the groove 500. The shape of the end of the connecting segment 400 is the same as the shape of the groove 500.

[0291] The cross-sectional area of ​​the bottom of the groove 500 is larger than the cross-sectional area of ​​the area enclosed by the opening of the groove 500. That is, the groove 500 is a groove-shaped structure with a small opening and a large bottom. When the end of the connecting section 400 is inserted into the groove 500, the first retaining member 120 can be radially and circumferentially limited along the first iron core section 110, and the second retaining member can be radially and circumferentially limited along the second iron core section. This effectively limits the first permanent magnet 150 and the second permanent magnet, preventing the first permanent magnet 150 from shifting relative to the first iron core section 110 and the second permanent magnet from shifting relative to the second iron core section.

[0292] In addition, the groove 500 of the first retainer 120 extends through the first core section 110 along the axial direction of the rotor 10. This arrangement enables the first retainer 120 and the first core section 110 to be effectively assembled, which has the advantage of convenient operation and helps to improve assembly efficiency and assembly feasibility.

[0293] Furthermore, the groove 500 of the second retainer extends through the second core section along the axial direction of the rotor 10. This arrangement enables effective assembly of the second retainer and the second core section, offering advantages in ease of operation and improving assembly efficiency and feasibility.

[0294] In some embodiments, the limiting portion 140 may be a resin limiting portion, which is formed by melt pressing.

[0295] In this embodiment, the material of the limiting part 140 is further defined so that the limiting part 140 is a resin limiting part. In this way, the hot melt machine can press melt the limiting post 800 to form the limiting part 140 by pressure melting, so that the limiting part 140 can limit the first permanent magnet 150 in the axial direction of the rotor 10.

[0296] In some embodiments, the number of limiting portions 140 is optionally N, where 2 ≤ N ≤ 10, and N is an even number.

[0297] In this embodiment, the number of limiting portions 140 is further limited, such that the number of limiting portions 140 is denoted as N, where 2≤N≤10, and N is an even number. For example, the number of limiting portions 140 includes 4, 6, and 8.

[0298] Specifically, when the motor is a 12-slot 8-pole motor, the number of limit parts 140 is 8.

[0299] Specifically, when the motor is a 12-slot, 10-pole motor, the number of limiting parts 140 is 10, and each first retaining member 120 is provided with a limiting part 140.

[0300] An electric motor according to some embodiments of this application includes: a rotor 10 as in any of the above embodiments.

[0301] The motor provided in this application includes the rotor 10 as described in the above embodiments, and therefore has all the beneficial effects of the rotor 10, which will not be described in detail here.

[0302] A steering system according to some embodiments of this application includes: a rotor 10 as in any of the above embodiments; or a motor as in the above embodiments.

[0303] The steering system provided in this application includes a rotor as described in the above embodiments, or a motor as described in the above embodiments. Therefore, it has all the beneficial effects of the rotor or motor described above, which will not be described one by one here.

[0304] A vehicle according to some embodiments of the present application includes: a motor as described in the above embodiments; or a steering system as described in the above embodiments.

[0305] The vehicle provided in this application includes a motor as described in the above embodiments, or a steering system as described in the above embodiments. Therefore, it has all the beneficial effects of the motor or steering system described above, which will not be described in detail here.

[0306] It is worth noting that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.

[0307] The vehicles can also be gasoline-powered cars and hybrid cars.

[0308] Optionally, this application provides a rotor 10, a motor, a steering system, a vehicle, and a method for manufacturing the rotor 10. A first core segment 110 has a plurality of first permanent magnets 150 arranged circumferentially on the rotor 10. A first retainer 120 holds the first permanent magnets 150 between the first retainer and the first core segment 110. The axial end face of the first retainer 120 has an original state hot-melt column (i.e., a limiting column 800). After the first permanent magnets 150 are installed, the hot-melt column is melted by a hot-melt machine to form a hot-melt head (i.e., a limiting part 140). The limiting part 140 can fix the first permanent magnets 150 axially on the first core segment 110 of the rotor 10.

[0309] Optionally, a rotor 10 includes: a rotating shaft 600; a first iron core segment 110 fixed to the outer peripheral surface of the rotating shaft 600; a plurality of first permanent magnets 150 arranged circumferentially along the rotor 10 and fixed to the outer peripheral surface of the first iron core segment 110; and a first retainer 120 holding the first permanent magnets 150 between the first retainer and the first iron core segment 110. The first retainer 120 is made of resin and has a plurality of hot-melt heads (i.e., limiting portions 140) on its axial end face. The number of limiting portions 140 is N, where 2 ≤ N ≤ 10, and N is an even number.

[0310] Optionally, along the axial direction of the rotor 10, the hot melt head overlaps with two adjacent first permanent magnets 150, and the outer peripheral surface of the hot melt head is closer to the middle of the first iron core segment 110 than the outer peripheral surface of the first permanent magnet 150.

[0311] Optionally, the lower surface of the hot melt head is in contact with the axial end face of the first permanent magnet 150.

[0312] Optionally, the outer periphery of the first permanent magnet 150 is provided with a steel sleeve (i.e., a fixing sleeve 160), the steel sleeve is a non-magnetic metal component, and the wall thickness of the steel sleeve is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0313] Optionally, the inner peripheral wall of the steel sleeve has a gap between the rotor 10 and the first permanent magnet 150 in the radial direction, and the inner peripheral wall of the steel sleeve has a gap between the rotor 10 and the first retainer 120 in the radial direction.

[0314] Optionally, the steel sleeve has steel sleeve positioning holes (i.e., connection holes 166), the number of which is the same as the number of hot melt heads.

[0315] Optionally, along the axial direction of the rotor 10, the diameter of the connecting hole 166 is smaller than the outer diameter of the hot melt head. The lower surface of the hot melt head is in contact with the upper end face of the steel sleeve, and the outer peripheral surface of the hot melt head is closer to the middle of the first iron core section 110 relative to the outer diameter of the steel sleeve.

[0316] Optionally, the hot melt head is formed by pressing and melting the original hot melt column through a hot melt machine.

[0317] The motor includes a rotor 10 and a stator, which are rotatably connected.

[0318] After the first permanent magnet 150 is installed, the original hot melt column is pressed and melted into a hot melt head. This effectively prevents the first permanent magnet 150 from falling off along the axial direction of the rotor 10. This setting reduces the amount of material used and helps to reduce costs.

[0319] There is a gap between the steel sleeve and the first permanent magnet 150.

[0320] When installing the steel sleeve, it is relatively convenient to install the steel sleeve and the assembly process is simplified. The original hot-melt column is pressed and melted into a hot-melt head, which effectively prevents the steel sleeve from loosening during operation and increases the reliability of the motor.

[0321] Optionally, the chassis system includes a drivetrain, a running gear, 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 various components, forming the overall shape of the vehicle, and receives power from the engine to enable the vehicle to move and ensure normal driving.

[0322] This application provides a method for manufacturing a rotor, used to prepare the rotor as described in the above embodiments, such as... Figure 34 As shown, the method for manufacturing this rotor includes:

[0323] S1202, a plurality of first permanent magnets and a plurality of first retainer substrates are placed on the outer periphery of the first core section along the circumference of the rotor;

[0324] S1204, the first retainer substrate is pressed and melted using a hot melt machine to form a first core segment group, so that the limiting part limits the first permanent magnet in the axial direction of the rotor.

[0325] This application specifies the detailed steps of the rotor preparation method.

[0326] Multiple first permanent magnets and multiple first retainer substrates are placed circumferentially on the outer periphery of the first core segment. The multiple first retainers are arranged at intervals circumferentially along the rotor, with adjacent first retainers and first core segments forming first mounting slots; that is, the multiple first retainers and first core segments form multiple first mounting slots. Each first mounting slot is provided with a first permanent magnet. The shape of the first permanent magnet matches the shape of the first mounting slot.

[0327] Multiple first retainer substrates and multiple first permanent magnets are assembled circumferentially on the outer periphery of the first core segment. The first retainer substrates are then melted using a hot melt machine to form a first core segment assembly, so that the limiting portion of the first retainer limits the first permanent magnets axially on the rotor. It is understood that the first mounting groove is used to limit the first permanent magnets radially and circumferentially on the rotor, and the limiting portion protrudes from the axial end face of the first core segment, thus limiting the first permanent magnets axially on the rotor.

[0328] In other words, the first iron core segment cooperates with multiple first retaining members to fasten and limit multiple first permanent magnets in the circumferential, radial, and axial directions of the rotor, so that the first permanent magnets are securely assembled onto the first iron core segment. This avoids the possibility of multiple first permanent magnets becoming loose due to assembly errors, ensures the assembly dimensions of the first permanent magnets and the first iron core segment, effectively increases the reliability of the motor, and suppresses motor noise.

[0329] In some embodiments, the step of using a hot melt machine to press-melt the first retainer substrate to form the first core segment group specifically includes: using a hot melt machine to press-melt the limiting post of the first retainer substrate to form a limiting portion, and making the limiting portion fit against the axial end faces of two adjacent first permanent magnets.

[0330] In this embodiment, the step of using a hot melt machine to press-melt the first retainer substrate to form the first core segment assembly is further defined.

[0331] The limiting post of the first retaining component substrate is pressed and melted by the hot melt machine to form a limiting part, so that the limiting part and the axial end face of the two adjacent first permanent magnets are fitted together.

[0332] This design reduces the axial spacing between the limiting part and the two first permanent magnets on the rotor, thereby reducing the axial movement of the first permanent magnets on the rotor and preventing the first permanent magnets from becoming loose.

[0333] It is understandable that when both the first end face and the second end face of the first retainer are provided with limiting portions, the limiting portion of the first end face is fitted with the axial end faces of the two adjacent first permanent magnets, and the limiting portion of the second end face is fitted with the axial end faces of the two adjacent first permanent magnets.

[0334] In some embodiments, optionally, before the step of using a hot melt machine to press-melt the first retainer substrate to form the first core segment group, the method further includes: fitting a rotor fixing sleeve on the outside of the plurality of first retainer substrates and allowing the limiting post of the first retainer substrate to pass through the connecting hole of the fixing sleeve; using a hot melt machine to press-melt the limiting post to form a limiting portion and fitting the limiting portion to the cover plate of the fixing sleeve.

[0335] In this embodiment, the step of using a hot melt machine to press-melt the first retainer substrate to form the first core segment assembly is further defined.

[0336] A rotor fixing sleeve is sleeved on the outside of multiple first retaining substrates. The limiting post of the first retaining substrate extends out of the outer surface of the cover plate through the connecting hole. The limiting post is pressed and melted by a hot melt machine to form a limiting part. The part of the limiting part outside the cover plate blocks the connecting hole. The limiting part will not separate from the fixing sleeve through the connecting hole, which can meet the use requirements of effectively limiting the first permanent magnet in the axial direction of the rotor.

[0337] It is understandable that the portion of the limiting part located outside the cover plate blocks the connecting hole, and the outer peripheral wall of the limiting part is located outside the hole wall of the connecting hole. In other words, the portion of the limiting part located outside the cover plate covers the connecting hole.

[0338] In addition, the retaining plate and cover plate of the fixing sleeve cooperate to limit the first permanent magnet in the radial direction, circumferential direction and axial direction of the rotor. The fixing sleeve has the function of protecting the first permanent magnet and collecting the debris of the first permanent magnet, and provides structural support to ensure the performance of the motor.

[0339] Understandably, the limiting part is closer to the center of the rotor than the outer surface of the enclosure plate; that is, the limiting part and the outer surface of the enclosure plate are spaced apart. In other words, there is a gap between the limiting part and the outer surface of the enclosure plate. Therefore, the limiting part will not protrude beyond the outer surface of the enclosure plate, thus not affecting the stator-rotor clearance of the motor, preventing interference with the stator, and ensuring the normal operation of the motor.

[0340] In addition, the fixed sleeve and the limiting part work together to position the fixed sleeve in the radial and circumferential directions of the rotor, preventing the fixed sleeve from becoming misaligned.

[0341] It is understandable that when both the first end face and the second end face are provided with limiting parts, there are two fixing sleeves, and each fixing sleeve cooperates with a limiting part.

[0342] When both the first and second end faces are provided with limiting parts, that is, when the rotor includes a first core segment group, the first end face is provided with a limiting part and the second end face is provided with a limiting part. In this case, there are two fixing sleeves, and each fixing sleeve cooperates with a limiting part.

[0343] This configuration allows the limiting portions on both sides of the first retainer and the two fixing sleeves to effectively limit the first permanent magnet in the axial direction of the rotor, preventing the first permanent magnet from becoming loose.

[0344] In some embodiments, the method of manufacturing the rotor may optionally include: assembling at least one second core segment group of the rotor between two first core segment groups.

[0345] In this embodiment, when the rotor includes two first core segment groups and at least one second core segment group, the at least one second core segment group of the rotor is assembled between the two first core segment groups.

[0346] The portion of the first retainer away from the second core segment group is provided with a limiting part, and the two first core segment groups can limit the second permanent magnet of at least one second core segment group in the axial direction of the rotor.

[0347] Furthermore, any one of the plurality of second retaining members is disposed on the outer periphery of the second core segment, and a second mounting groove is formed between two adjacent second retaining members and the second core segment; that is, the plurality of second retaining members and the second core segment form a plurality of second mounting grooves. Each second mounting groove is provided with a second permanent magnet. The shape of the second permanent magnet matches the shape of the second mounting groove.

[0348] In other words, the two first core segments, the second core segment, and multiple second retaining members cooperate to secure and limit multiple second permanent magnets in the circumferential, radial, and axial directions of the rotor, ensuring that the second permanent magnets are firmly assembled onto the second core segment. This prevents the second permanent magnets from becoming loose due to assembly errors, guarantees the assembly dimensions of the second permanent magnets and the second core segment, effectively increases the reliability of the motor, and suppresses motor noise.

[0349] Among them, such as Figure 1 , Figure 4 , Figure 9 and Figure 15 As shown, the distance from the center of the first iron core segment to the radial outer surface of the first permanent magnet is denoted as R.

[0350] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0351] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotor, characterized in that, include: The first core segment group includes: First core section; Multiple first retaining members are disposed on the outer periphery of the first iron core segment, and the multiple first retaining members are arranged at intervals along the circumference of the rotor. A first mounting groove is formed between two adjacent first retaining members and the first iron core segment. The first retaining members are provided with limiting portions. A plurality of first permanent magnets are provided, each of the first permanent magnets being disposed in a first mounting slot. The first mounting slot is used to limit the first permanent magnet in the radial and circumferential directions of the rotor. The limiting part protrudes from the axial end face of the first iron core segment and is used to limit the first permanent magnet in the axial direction of the rotor.

2. The rotor according to claim 1, characterized in that, The limiting portion is provided on the axial end face of the first retaining member.

3. The rotor according to claim 2, characterized in that, Along the axial direction of the rotor, the first retainer has a first end face and a second end face disposed opposite to each other, and at least one of the first end face and the second end face is provided with the limiting portion.

4. The rotor according to claim 3, characterized in that, In the limiting part and the two adjacent first permanent magnets, the first part of the limiting part overlaps with one of the first permanent magnets, and the second part of the limiting part overlaps with the other first permanent magnet. The limiting portion is closer to the center of the rotor than the radial outer surface of the first permanent magnet.

5. The rotor according to claim 4, characterized in that, The limiting part and the axial end faces of the two adjacent first permanent magnets are fitted together.

6. The rotor according to claim 4, characterized in that, When the rotor includes a first core segment group, both the first end face and the second end face are provided with the limiting part; When the rotor includes two first core segment groups, the first core segments of the two first core segment groups are arranged opposite to each other, the first end faces of the two first core segment groups are arranged opposite to each other, and the second end face of the first retainer is provided with the limiting portion.

7. The rotor according to claim 3, characterized in that, The first core segment group also includes: The fixing sleeve includes: A surrounding panel is disposed around the outer periphery of the plurality of the first retaining members; A cover plate is provided on one end face of the enclosure plate. The cover plate has a connecting hole. The hole wall of the connecting hole surrounds the periphery of the limiting part. A part of the limiting part is located outside the cover plate. The part of the limiting part outside the cover plate blocks the connecting hole. The limiting part is closer to the center of the rotor than the outer surface of the enclosure plate. The limiting part limits the first permanent magnet in the axial direction of the rotor through the fixing sleeve.

8. The rotor according to claim 7, characterized in that, When the rotor includes a first core segment group, the first end face and the second end face are both provided with the limiting part, the number of the fixing sleeves is two, each fixing sleeve cooperates with one of the limiting parts, and the two fixing sleeves are arranged abutting or spaced apart in the axial direction of the rotor. When the rotor includes two first core segment groups, the first core segments of the two first core segment groups are arranged opposite to each other, the first end faces of the two first core segment groups are arranged opposite to each other, the second end face of the first retainer is provided with the limiting part, each first core segment group includes a fixing sleeve, and the fixing sleeves of the two first core segment groups are arranged abutting or spaced apart in the axial direction of the rotor.

9. The rotor according to claim 7, characterized in that, The fixing sleeve is a non-magnetic metal sleeve; The thickness of the fixing sleeve is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

10. The rotor according to claim 7, characterized in that, The first retainer and the first permanent magnet have a gap between themselves and the inner surface of the enclosure.

11. The rotor according to claim 7, characterized in that, The limiting part is fitted to the cover plate.

12. The rotor according to any one of claims 1 to 11, characterized in that, The first retainer includes: The connecting section has a first wall and a second wall disposed opposite to each other in the radial direction of the rotor. The first wall is located between the center of the rotor and the second wall, and the first wall is disposed in contact with the radial outer surface of two adjacent first permanent magnets. The connecting section extends from the connecting section toward the center of the rotor and is sandwiched between two adjacent first permanent magnets. The first iron core section has a groove, and the end of the connecting section is inserted into the groove.

13. The rotor according to claim 12, characterized in that, The shape of the end of the connecting section is the same as the shape of the groove, and the cross-sectional area of ​​the bottom of the groove is greater than the cross-sectional area of ​​the area enclosed by the opening of the groove. The groove extends through the first iron core section along the axial direction of the rotor.

14. The rotor according to any one of claims 1 to 11, characterized in that, The limiting part is a resin limiting part, which is formed by pressure melting.

15. The rotor according to any one of claims 1 to 11, characterized in that, The number of limiting parts is N, where 2 ≤ N ≤ 10, and N is an even number.

16. An electric motor, characterized in that, include: The rotor as described in any one of claims 1 to 15.

17. A steering system, characterized in that, include: The rotor as described in any one of claims 1 to 15; or The motor as described in claim 16.

18. A vehicle, characterized in that, include: The motor as described in claim 16; or The steering system as described in claim 17.

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