Iron core, stator, linear motor, suspension system, and vehicle

Abstract

An iron core, a stator, a linear motor, a suspension system, and a vehicle. The iron core comprises a yoke part; the yoke part is provided with a first reinforcing part; the first reinforcing part at least partially covers the yoke part; and the strength of the first reinforcing part is greater than that of the yoke part.

Description

Iron core, stator, linear motor, suspension system and vehicle

[0001] This application claims priority to the Chinese patent application No. 202422393536.6, filed on September 27, 2024, and entitled "Iron core, stator, linear motor, suspension system and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electric machines, and in particular to an iron core, a stator, a linear motor, a suspension system and a vehicle. BACKGROUND

[0003] In the related art, a stator structure is prepared by powder metallurgy using soft magnetic composite powder material, which has excellent performance of high magnetic permeability and low eddy current loss. However, the stator core prepared by powder metallurgy has pores, which makes the strength of the stator core insufficient, thereby reducing the mechanical properties such as strength and hardness of the stator core, and causing deformation, cracking and other problems of the stator core when it bears a large electromagnetic force, mechanical stress or thermal stress, thereby limiting the application of the stator core prepared by powder metallurgy. SUMMARY

[0004] Embodiments of the present application provide an iron core, a stator, a linear motor, a suspension system and a vehicle, which improve the structural strength of the iron core to at least partially solve the above technical problems.

[0005] In a first aspect, embodiments of the present application provide an iron core, comprising: a yoke portion, the yoke portion being provided with a first reinforcing portion, the first reinforcing portion at least partially covering the yoke portion, and the strength of the first reinforcing portion being greater than the strength of the yoke portion.

[0006] In some embodiments, the yoke portion comprises an inner side surface, and the first reinforcing portion at least partially covers the inner side surface.

[0007] In some embodiments, the yoke portion comprises a top end surface and an outer end surface connected to each other, and the first reinforcing portion at least partially covers the top end surface and / or the outer end surface.

[0008] In some embodiments, the iron core further comprises a pressure-bearing member, the yoke portion comprises an inner side surface, and the pressure-bearing member is arranged at the inner side surface.

[0009] In some embodiments, the yoke portion comprises an inner side surface, the inner side surface is provided with a first groove, the pressure-bearing member is provided with a notch, and the first groove and the notch are arranged in cooperation and communication, so that the first reinforcing portion at least partially fills the first groove and the notch.

[0010] In some embodiments, the strength of the pressure-bearing member is greater than the strength of the yoke portion.

[0011] In some embodiments, the pressure-bearing member is a steel sleeve.

[0012] In some embodiments, the height of the pressure-bearing member along the axial direction of the core is less than the height of the yoke portion along the axial direction of the core.

[0013] In some embodiments, the pressure-bearing member comprises a first protrusion, and the yoke portion further comprises a second protrusion disposed on the inner side surface and corresponding to the inner side of the first protrusion.

[0014] In some embodiments, the core comprises a tooth portion, the tooth portion comprises a second reinforcing portion, the tooth portion is provided with opposite upper and lower end surfaces along the axial direction, and the second reinforcing portion at least partially covers the upper and / or lower end surfaces.

[0015] In some embodiments, the upper and / or lower end surface is provided with a groove, and the second reinforcing portion at least partially covers the groove.

[0016] In some embodiments, the tooth portion further comprises an outer side surface and an inner end surface disposed between the upper and lower end surfaces, and the groove is disposed to extend from the inner end surface toward the outer side surface.

[0017] In some embodiments, the groove is disposed to extend along the circumferential direction of the core.

[0018] In some embodiments, the groove is in communication with the outer side surface of the yoke portion.

[0019] In some embodiments, a gap is disposed between the groove and the outer side surface of the yoke portion.

[0020] In some embodiments, the groove comprises a second groove disposed on the upper end surface and a third groove disposed on the lower end surface, and the tooth portion is further provided with a communication hole in communication with the second groove and the third groove.

[0021] In some embodiments, the projection of the second groove and the third groove along the axial direction of the core at least partially overlaps.

[0022] In some embodiments, the upper and / or lower end surface comprises a protruding rib, and the second reinforcing portion covers the rib.

[0023] In some embodiments, the tooth portion further comprises an outer side surface, the outer side surface is provided with a circumferentially extending tooth crown, the tooth crown is provided with a discontinuity, and the second reinforcing portion at least partially fills the discontinuity.

[0024] In some embodiments, the crown includes a top end surface and a bottom end surface, the top end surface and the bottom end surface are arranged as bevels.

[0025] In some embodiments, the tooth includes a plurality of wire slots, the tooth includes opposite upper and lower end surfaces and an outer side surface connected between the upper and lower end surfaces, the wire slots include a first wire slot arranged on the upper end surface; and / or, the wire slots further include a second wire slot arranged on the lower end surface; and / or, the wire slots further include a third wire slot arranged on the outer side surface.

[0026] In the second aspect, the embodiments of the present application provide a stator, including a core.

[0027] In some embodiments, the stator includes a plurality of the cores, the plurality of the cores are stacked along an axial direction of the stator.

[0028] In the third aspect, the embodiments of the present application provide a linear motor, including the above-mentioned stator.

[0029] In the fourth aspect, the embodiments of the present application provide a linear motor, including the above-mentioned stator.

[0030] In the fifth aspect, the embodiments of the present application provide a suspension system, including the above-mentioned motor.

[0031] In the sixth aspect, the embodiments of the present application provide a vehicle, including the above-mentioned suspension system.

[0032] The core provided by the embodiments of the present application enhances the structural strength of the core by arranging a first reinforcing portion on the yoke of the core, the first reinforcing portion at least partially covers the yoke, and the strength of the first reinforcing portion is greater than that of the yoke.

[0033] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0035] In order to more completely understand the present application and its advantages, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0036] Fig. 1 is a perspective view of the iron core from one angle in combination with the first and second reinforcing portions according to an exemplary embodiment of the present disclosure;

[0037] Fig. 2 is a perspective view of the iron core from another angle in combination with the first and second reinforcing portions according to an exemplary embodiment of the present disclosure;

[0038] Fig. 3 is a sectional view of the iron core connected to the pressure receiving member according to an exemplary embodiment of the present disclosure;

[0039] Fig. 4 is a perspective view of the iron core from one angle according to an exemplary embodiment of the present disclosure;

[0040] Fig. 5 is a perspective view of the iron core from another angle according to an exemplary embodiment of the present disclosure;

[0041] Fig. 6 is a sectional view of the iron core according to an exemplary embodiment of the present disclosure;

[0042] Fig. 7 is a perspective view of the pressure receiving member from one angle according to an exemplary embodiment of the present disclosure;

[0043] Fig. 8 is a perspective view of the pressure receiving member from another angle according to an exemplary embodiment of the present disclosure;

[0044] Fig. 9 is a schematic view of the overall structure of the iron core connected to the pressure receiving member from one angle according to an exemplary embodiment of the present disclosure;

[0045] Fig. 10 is a schematic view of the overall structure of the iron core connected to the pressure receiving member from another angle according to an exemplary embodiment of the present disclosure;

[0046] Fig. 11 is a block diagram of a vehicle according to an exemplary embodiment of the present disclosure;

[0047] BRIEF DESCRIPTION OF THE DRAWINGS 10: iron core; 1: yoke portion; 114: inner side surface; 115: top end surface; 116: outer end surface; 3: tooth portion; 111: upper end surface; 112: lower end surface; 113: outer side surface; 117: inner end surface; 121: first reinforcing portion; 122: second reinforcing portion; 13: inner hole; 14: groove; 141: second groove; 142: third groove; 143: communication hole; 144: first groove; 145: break; 16: tooth crown; 161: top end surface of tooth crown; 162: bottom end surface of tooth crown; 17: wire slot; 171: first wire slot; 172: second wire slot; 173: third wire slot; 18: second boss; 2: pressure receiving member; 211: top end surface of pressure receiving member; 212: bottom end surface of pressure receiving member; 22: first boss; 23: notch; 100: vehicle DETAILED DESCRIPTION

[0048] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative effort belong to the protection scope of the present application.

[0049] The present application provides a core 10, please refer to FIG. 1 to FIG. 3, the core 10 is provided with an inner hole 13, the inner hole 13 of the core 10 is used for the center rod of the suspension motor to pass through.

[0050] The core 10 includes a yoke part 1 and a tooth part 3, the inner hole 13 is arranged in the yoke part 1, the tooth part 3 is arranged around the yoke part 1, and the yoke part 1 is arranged protruding relative to the tooth part 3.

[0051] The core 10 is an SMC core prepared by a powder metallurgy process, and the material for preparing the SMC core includes SMC (Soft Magnetic Composite) composite powder, the SMC composite powder includes a plurality of SMC composite powder particles, the SMC composite powder particles include SMC powder particles and an insulating material coated on the surface of the SMC powder particles, the SMC powder particles are mainly high-purity iron powder or iron-nickel alloy powder, and the insulating material includes resin and the like. The core 10 uses the SMC composite powder to convert the SMC composite powder into a stator core structure with a predetermined shape, size and performance through pretreatment, compression molding and sintering of the SMC composite powder by a powder metallurgy process. Since the surface of the SMC composite powder particles is coated with an insulating material, the prepared SMC core has excellent performance of high magnetic permeability and low eddy current loss. At the same time, the yoke part 1 and the tooth part 3 of the core 10 are compressed into a final structure form close to the stator core by a powder metallurgy process, thereby reducing secondary mechanical processing of the stator core, so as to effectively reduce the material consumption and production cost of the stator core, and has important application prospect for manufacturing complex geometric shape and high-precision core 10.

[0052] The core 10 prepared by a powder metallurgy process has pores, so that the core 10 does not have a dense structure, thereby reducing the density, strength and hardness and other mechanical properties of the core 10, and further causing the core 10 to deform, crack and other problems when bearing a large electromagnetic force, mechanical force or thermal stress, thereby limiting the application scenarios of the core 10.

[0053] In some embodiments of the present application, the core 10 further comprises a first reinforcing portion 121 at least partially covering the yoke portion 1, wherein the first reinforcing portion 121 has a strength greater than that of the yoke portion 1 of the core 10, thereby enhancing the structural strength of the yoke portion 1 of the core 10. In one embodiment, the first reinforcing portion 121 is injection molded using a plastic material and is coupled to the yoke portion 1 of the core 10, thereby providing good electrical insulation and preventing direct contact between the yoke portion 1 of the core 10 and other conductive components of the stator, thereby improving electrical faults caused by short circuits or electrical leakage. At the same time, the first reinforcing portion 121 also helps to reduce mechanical noise and vibration generated by the stator.

[0054] In some embodiments, referring to FIGS. 1, 2, 4 and 5, the yoke portion 1 of the core 10 is configured in a ring shape, and the yoke portion 1 includes an inner side surface 114 that encloses the inner hole 13, and the first reinforcing portion 121 at least partially covers the inner side surface 114. Since the inner hole 13 of the yoke portion 1 of the core 10 is used for passing the center rod, when the yoke portion 1 is prepared using a powder metallurgy process and has poor hardness and strength, the inner side surface 114 of the yoke portion 1 is difficult to withstand the extrusion force of the center rod. By covering the first reinforcing portion 121 at the inner side surface 114 of the yoke portion 1, the first reinforcing portion 121 is configured to have an interference or transition fit with the center rod, and since the first reinforcing portion 121 has a hardness and strength greater than that of the yoke portion 1, it can be interference or transition fitted with the center rod without being deformed.

[0055] With continued reference to FIGS. 4 and 5, the yoke portion 1 further includes opposite top and outer end surfaces 115 and 116, wherein the outer side surface 113 is configured to be opposite to the inner side surface 114, and the outer end surface 116 is configured to be a convex outer end surface relative to the tooth portion 3, and the first reinforcing portion 121 at least partially covers the top and / or outer end surfaces 115 and 116. By covering the first reinforcing portion 121 at the top end surface 115 of the yoke portion 1, the structural strength of the top end surface 115 of the yoke portion 1 is enhanced. By covering the first reinforcing portion 121 at the outer end surface 116 of the yoke portion 1, the structural strength of the outer end surface 116 of the yoke portion 1 is enhanced.

[0056] In some embodiments, as shown in FIG. 1, FIG. 7 and FIG. 8, the core 10 further comprises a pressure bearing member 2 connected to the inner side surface 114 of the yoke portion 1, which encloses the inner hole 13 for the center rod to pass through. Since the hardness and strength of the stator core portion 11 is poor, the inner side surface 114 of the yoke portion 1 is difficult to bear the extrusion force of the center rod. By providing the pressure bearing member 2 at the inner hole 13 of the core 10, the pressure bearing member 2 is provided with an interference or transition fit with the center rod, and since the hardness of the pressure bearing member 2 is greater than the hardness of the stator core portion 11, the pressure bearing member 2 can be deformed with the interference or transition fit with the center rod. The pressure bearing member 2 can be a steel sleeve, which is combined with the yoke portion 1 by injection molding. In another embodiment, the pressure bearing member 2 is made of plastic material and is injection molded on the inner side surface 114 of the yoke portion 1.

[0057] When the pressure bearing member 2 is a steel sleeve, as shown in FIG. 3, FIG. 7 and FIG. 8, the height of the pressure bearing member 2 extending along the axial direction of the core 10 is not greater than the height of the yoke portion 1 extending along the axial direction of the core 10. The pressure bearing member 2 comprises a top end surface 211 and a bottom end surface 212, the top end surface 211 of the pressure bearing member 2 does not protrude beyond the top end surface 115 of the yoke portion 1, and the bottom end surface 212 of the pressure bearing member 2 does not protrude beyond the lower end surface 112 of the yoke portion 1, i.e. the top end surface 115 of the yoke portion 1 and the top end surface 211 of the pressure bearing member 2 form an upper end axial spacing space, and the lower end surface 112 of the yoke portion 1 and the bottom end surface 212 of the pressure bearing member 2 form a lower end axial spacing space, the inner side surface of the yoke portion 1 in the upper end axial spacing space and the lower end axial spacing space constitutes another part for injection molding of the first reinforcing portion 121, and a part of the first reinforcing portion 121 is formed by filling injection molding.

[0058] In an embodiment, as shown in FIG. 5 and FIG. 7, the inner side surface 114 of the yoke portion 1 is provided with a first groove 144, and the pressure bearing member 2 is provided with a notch 23 extending to the top end surface 211 of the pressure bearing member 2 or the bottom end surface 212 of the pressure bearing member 2. By providing the notch 23 on the pressure bearing member 2, the pressure bearing member 2 and the yoke portion 1 are combined into a whole by injection molding, thereby effectively preventing the pressure bearing member 2 from rotating circumferentially relative to the yoke portion 1, and the wire slots 17 of a plurality of stator cores 10 are projected along the axis of the center rod and overlap each other.

[0059] The first groove 144 and the notch 23 are cooperatively arranged and communicated, and the communication between the first groove 144 and the notch 23 is arranged such that the injection molding material filled in the first groove 144 and the injection molding material filled in the notch 23 can be connected into a whole, further enhancing the structural strength of the core 10.

[0060] Continuing to refer to FIG. 9, the pressure bearing 2 further comprises a first protrusion 22 protruding towards the center axis of the iron core 10, and the center rod of the motor is provided with a matching part, which is embedded with the first protrusion 22, thereby effectively preventing the iron core 10 from rotating circumferentially relative to the center rod. It can be understood that, in the assembly process of the cylindrical permanent magnet linear motor, even if the contact position of the inner side surface of the pressure bearing 2 of the iron core 10 with the center rod is designed as an interference fit, the circumferential rotation between the iron core 10 and the center rod cannot be guaranteed along the circumference of the iron core 10. By providing the first protrusion 22 on the inner side surface of the pressure bearing 2, the first protrusion 22 is embedded with the center rod, so that the circumferential rotation between the iron core 10 and the center rod cannot be formed.

[0061] In the embodiment, the first protrusion 22 is provided in a circular arc shape, which is conducive to forming stable embedding between the first protrusion 22 and the center rod.

[0062] Correspondingly, a second protrusion 18 is provided on the inner side surface 114 of the yoke part 1, the second protrusion 18 is provided in a circular arc shape, and the inner side surface of the first protrusion 22 is provided as a circular arc-shaped groove, the second protrusion 18 is embedded in the circular arc-shaped groove, thereby facilitating the prevention of circumferential rotation of the iron core 10.

[0063] Referring to FIGS. 1, 4-6, the tooth part 3 of the iron core 10 comprises a second reinforcing part 122, the tooth part 3 comprises axially opposite upper and lower end surfaces 111 and 112, and outer and inner end surfaces 113 and 117 connected between the upper and lower end surfaces 111 and 112, and the inner end surface 117 of the tooth part 3 is connected to the outer end surface 116 of the yoke part 1. The second reinforcing part 122 at least partially covers the upper and / or lower end surfaces 111 and 112. By covering the upper and / or lower end surfaces 111 and 112 of the tooth part 3 with the second reinforcing part 122, the second reinforcing part 122 covers the upper and lower end surfaces 111 and 112 by means of secondary injection molding to enhance the structural strength of the upper and lower end surfaces 111 and 112.

[0064] A groove 14 is provided on the upper and / or lower end surfaces 111 and 112 of the tooth part 3, which is provided to be filled with the second reinforcing part 122 by secondary injection molding. In a specific embodiment, the groove 14 comprises a second groove 141 provided on the upper end surface 111 and a third groove 142 provided on the lower end surface 112, and the tooth part 3 is further provided with a communication hole 143 communicating the second and third grooves 141 and 142, so that in the process of secondary injection molding, the first part of the second reinforcing part 122 combined with the second groove 141, the second part of the second reinforcing part 122 combined with the communication hole 143, and the third part of the second reinforcing part 122 combined with the third groove 142 are connected as a whole by injection molding, thereby facilitating further enhancing the structural strength of the iron core 10 as a whole.

[0065] In some embodiments, the second grooves 141 provided on the upper end surface 111 can be multiple grooves, and the third grooves 142 provided on the lower end surface 112 can be multiple grooves. The multiple second grooves 141 and the multiple third grooves 142 can be provided in a strip shape, i.e., the grooves 14 are provided to extend from the inner end surface 117 of the tooth portion 3 toward the direction close to the outer side surface 113. The multiple second grooves 141 and the multiple third grooves 142 can be provided in a ring shape, which can be a regular ring shape or a spiral ring shape, i.e., the grooves 14 are provided to extend along the circumferential direction of the core 10.

[0066] In some embodiments, the grooves 14 provided on the tooth portion 3 can extend to the outer side surface 113 of the yoke portion 1, so that the second reinforcing portions 122 filled in the grooves 14 of the tooth portion 3 are connected with the first reinforcing portions 121 covering the outer side surface 113 of the yoke portion 1, thereby facilitating to enhance the structural strength of the core 10 as a whole. In alternative embodiments, a gap is provided between the grooves 14 provided on the tooth portion 3 and the outer side surface 113 of the yoke portion 1.

[0067] In some embodiments, the projection of the second grooves 141 and the third grooves 142 along the axial direction of the core 10 at least partially overlaps. In a specific embodiment, the overlapping part of the orthographic projection of the second grooves 141 along the axial direction of the core and the orthographic projection of the third grooves 142 along the axial direction of the core is a common edge, so as to minimize the influence on the magnetic flux path of the core 10.

[0068] In some embodiments, the first reinforcing portions 121 and the second reinforcing portions 122 are integrally formed by two-shot injection molding.

[0069] In some embodiments, the upper end surface 111 and / or the lower end surface 112 of the tooth portion 3 can further be provided with protruding ribs, and the second reinforcing portions 122 cover the ribs, so as to make the combination between the second reinforcing portions 122 and the tooth portion 3 more stable.

[0070] In some embodiments, as shown in FIGS. 1-5 and 10, the tooth portion 3 is further provided with multiple wire slots 17 for placing motor stator windings, and the number, depth and shape of the wire slots 17 are not limited in the embodiments of the present application. The wire slots 17 include first wire slots 171, second wire slots 172 and third wire slots 173, the first wire slots 171 are provided on the upper end surface 111 of the tooth portion 3, the second wire slots 172 are provided on the lower end surface 112 of the tooth portion 3, and the third wire slots 173 are provided on the outer side surface 113 of the tooth portion 3.

[0071] The first wire slot 171 and the second wire slot 172 are parallel to the stator winding when assembled. The third wire slot 173 is parallel to the stator winding when assembled, and the angle of the third wire slot 173 in the circumferential direction of the stator core 10 is the same as the angle of the stator winding in the circumferential direction of the tooth portion 3.

[0072] In some embodiments, referring to FIGS. 4 and 5, the tooth portion 3 further comprises a tooth crown 16 arranged on the outer side surface 113, the tooth crown 16 being used to reduce the tooth slot width of the core, optimize the magnetic flux path of the core, and thus reduce the magnetic resistance. The tooth crown 16 extends in the circumferential direction of the stator core 10, and the tooth crown 16 comprises opposite top and bottom end surfaces 161 and 162, which are both arranged as inclined surfaces, so as to reduce the peak value of the magnetic resistance, thereby facilitating the improvement of the thrust and efficiency of the motor.

[0073] The tooth crown 16 further comprises a break 145, and at least a portion of the second reinforcing portion 122 fills the break 145. The break 145 of the tooth crown 16 is connected by the second reinforcing portion 122, thereby enhancing the structural strength of the tooth portion 3. It should be noted that when the tooth crown 16 is provided with the break 145 and the wire slot 17 comprises the third wire slot 173 arranged on the outer side surface 113 of the tooth portion 3, the break 145 of the tooth crown 16 coincides with the third wire slot 173.

[0074] According to a first aspect of the present application, a core is disclosed, comprising a yoke portion and a first reinforcing portion at least partially covering the yoke portion, the first reinforcing portion having a strength greater than that of the yoke portion. By combining the yoke portion with the first reinforcing portion having a higher strength, the yoke portion of the formed core has a higher hardness, thereby effectively improving the structural strength of the yoke portion.

[0075] According to a second aspect of the present application, a stator is disclosed, comprising the above-mentioned core, and thus the stator has all the beneficial effects of the above-mentioned core, which will not be repeated in the embodiments of the present application.

[0076] In some embodiments, the stator comprises a plurality of cores stacked in the axial direction of the stator.

[0077] According to a third aspect of the present application, a linear motor is disclosed, comprising the above-mentioned stator, which comprises the above-mentioned core, and thus the linear motor has all the beneficial effects of the above-mentioned core, which will not be repeated in the embodiments of the present application.

[0078] According to a fourth aspect of the present application, a suspension system is disclosed, comprising the above-mentioned linear motor, which comprises the above-mentioned stator, which comprises the above-mentioned core, and thus the suspension system has all the beneficial effects of the above-mentioned core, which will not be repeated in the embodiments of the present application.

[0079] According to a fourth aspect of the present application, as shown in Fig. 11, a vehicle 100 is disclosed, which comprises the suspension system described above, the suspension system comprising the suspension motor described above, the suspension motor comprising the stator described above, so that the vehicle 100 has all the beneficial effects of the stator described above, which will not be repeated in the embodiments of the present application.

[0080] The vehicle 100 can be a fuel automobile, a plug-in hybrid electric vehicle or a new energy vehicle, etc., which is not specifically limited in the present disclosure.

[0081] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0082] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0083] The embodiments, implementation manners and related technical features of the present application can be combined, replaced with each other without conflict.

[0084] The above is only the preferred embodiments of the present application, and does not limit the present application in any form, but any simple modification, equivalent change and modification made according to the technical essence of the present application without departing from the technical solution content of the present application, all still belong to the scope of the technical solution of the present application.

Claims

1. An iron core (10), comprising: a yoke portion (1) provided with a first reinforcing portion (121) at least partially covering the yoke portion (1), the first reinforcing portion (121) having a strength greater than that of the yoke portion (1).

2. The core (10) of claim 1, wherein The yoke portion (1) comprises an inner side surface (114), and the first reinforcing portion (121) at least partially covers the inner side surface (114).

3. The core (10) according to any one of claims 1-2, wherein The yoke portion (1) comprises a top end surface (115) and an outer end surface (116) connected to each other, and the first reinforcing portion (121) at least partially covers the top end surface (115) and / or the outer end surface (116).

4. The core (10) according to any one of claims 1-3, wherein The iron core (10) further comprises a pressure bearing member (2), and the yoke portion (1) comprises an inner side surface (114), and the pressure bearing member (2) is arranged at the inner side surface (114).

5. The core (10) of claim 4, wherein The inner side surface (114) is provided with a first groove (144), and the pressure bearing member (2) is provided with a notch (23), and the first groove (144) is arranged in cooperation with and in communication with the notch (23) so that the first reinforcing portion (121) at least partially fills the first groove (144) and the notch (23).

6. The core (10) according to any one of claims 4-5, wherein The pressure bearing member (2) has a strength greater than that of the yoke portion (1).

7. The core (10) according to any one of claims 4-6, wherein The pressure bearing member (2) is arranged as a steel sleeve.

8. The core (10) according to any one of claims 4-7, wherein The height of the pressure bearing member (2) along the axial direction of the iron core (10) is less than the height of the yoke portion (1) along the axial direction of the iron core (10).

9. The core (10) according to any one of claims 4-8, wherein The pressure bearing member (2) comprises a first boss (22), and the yoke portion (1) further comprises a second boss (18) arranged at the inner side surface (114), and the second boss (18) is arranged on the inner side corresponding to the first boss (22).

10. The core (10) according to any one of claims 1-9, wherein The iron core (10) comprises a tooth portion (3) comprising a second reinforcing portion (122), and the tooth portion (3) is provided with opposite upper and lower end surfaces (111, 112) along the axial direction, and the second reinforcing portion (122) at least partially covers the upper and / or lower end surfaces (111, 112).

11. The core (10) of claim 10, wherein The upper and / or lower end surfaces (111, 112) are provided with a groove (14), and the second reinforcing portion (122) at least partially covers the groove (14).

12. The core (10) of claim 11, wherein The tooth portion (3) further comprises an outer side surface (113) and an inner end surface (117) arranged between the upper and lower end surfaces (111, 112), and the groove (14) is arranged to extend from the inner end surface (117) towards the outer side surface (113).

13. The core (10) according to any one of claims 11-12, wherein The groove (14) is arranged to extend along the circumferential direction of the iron core (10).

14. The core (10) according to any one of claims 11-13, wherein The groove (14) is in communication with the outer side surface (113) of the yoke portion (1).

15. The core (10) according to any one of claims 11-14, wherein A space is arranged between the groove (14) and the outer side surface (113) of the yoke portion (1).

16. The core (10) according to any one of claims 12-15, wherein The recess (14) comprises a second recess (141) arranged on the upper end surface (111) and a third recess (142) arranged on the lower end surface (112), and the tooth portion (3) is further provided with a communication hole (143) which communicates the second recess (141) and the third recess (142).

17. The core (10) of claim 16, wherein The projection of the second recess (141) and the third recess (142) along the axial direction of the core (10) at least partially overlaps.

18. The core (10) according to any one of claims 10-17, wherein The upper end surface (111) and / or the lower end surface (112) comprises a raised rib, and the second reinforcing portion (122) covers the rib.

19. The core (10) according to any one of claims 10-18, wherein The tooth portion (3) further comprises an outer side surface (113) which is provided with a circumferentially extending tooth crown (16), and the tooth crown (16) is provided with a break (145), and the second reinforcing portion (122) at least partially fills the break (145).

20. The core (10) of claim 19, wherein The tooth crown (16) comprises a top end surface (161) and a bottom end surface (162), and the top end surface (161) and the bottom end surface (162) are arranged as inclined surfaces.

21. The core (10) according to any of claims 10-20, wherein The tooth portion (3) comprises a plurality of wire grooves (17), and the tooth portion (3) comprises opposite upper and lower end surfaces (111, 112) and an outer side surface (113) connected between the upper and lower end surfaces (111, 112), and the wire grooves (17) comprise first wire grooves (171) arranged on the upper end surface (111); and / or, the wire grooves (17) further comprise second wire grooves (172) arranged on the lower end surface (112); and / or, the wire grooves (17) further comprise third wire grooves (173) arranged on the outer side surface (113).

22. A stator comprising the core (10) according to any one of claims 1-21.

23. The stator of claim 22, wherein, The stator comprises a plurality of the cores (10) stacked along the axial direction of the stator.

24. A linear motor comprising the stator according to any one of claims 22-23.

25. A suspension system comprising the linear motor according to claim 24.

26. A vehicle (100) comprising the suspension system according to claim 25.

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