Iron core assembly, linear motor, suspension system and vehicle

Abstract

The utility model discloses an iron core assembly, a linear motor, a suspension system and a vehicle, the iron core assembly comprises a central shaft, the peripheral wall of the central shaft is provided with a first positioning part extending along the axial direction; the central shaft is sleeved with the iron core unit, a second positioning part is arranged on the inner circumferential wall of the iron core unit, and the first positioning part and the second positioning part are matched to limit the central shaft and the iron core unit in the circumferential direction; and the first positioning part and the central shaft are integrally formed, or the second positioning part and the iron core unit are integrally formed. According to the iron core assembly designed by the utility model, the matching surface of the first positioning part and the second positioning part is the arc-shaped surface, so that the matching surface of the first positioning part and the second positioning part in the circumferential direction is larger and the transition is smoother; the shearing stress surface area between the first positioning part and the second positioning part is increased, the problem of stress concentration can be avoided, and the bearing capacity of the first positioning part and the second positioning part to shearing force is improved.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to an iron core component, a linear motor, a suspension system and a vehicle. Background Art

[0002] In the related art, the motor mostly uses a square keyway structure, and a slotted structure is opened on both mating surfaces, and the key piece is manufactured and inserted separately. In some existing technologies, a keyway and a balancing keyway are set on the center shaft of the motor, and the rotor core is mounted on the center shaft. This structure is simple and effective, which greatly reduces the balancing blocks that need to be welded on the rotor in the later stage, improves the overall symmetry of the motor, and reduces the workload of dynamic balancing. However, it uses a separate square key piece, and both the rotor core and the center shaft are slotted. The mating shear surface between the square key piece and the rotor core and the center shaft is small, so that the stress is more concentrated during mating, which can easily cause deformation or even breakage of the rotor core, the center shaft and / or the square key piece. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose an iron core assembly. According to the iron core assembly designed by the utility model, by making the matching surface of the first positioning part and the second positioning part an arc surface, the matching surface of the first positioning part and the second positioning part in the circumferential direction is larger and the transition is smoother, thereby increasing the shear force surface area between the first positioning part and the second positioning part and avoiding the problem of stress concentration.

[0004] The utility model also provides a linear motor with the iron core assembly.

[0005] The utility model also provides a suspension system with the linear motor.

[0006] According to the utility model, the core assembly includes: a central axis, the outer peripheral wall of the central axis is provided with a first positioning portion extending in the axial direction; and a core unit, the core unit is sleeved on the central axis, the inner peripheral wall of the core unit is provided with a second positioning portion suitable for cooperating with the first positioning portion, the first positioning portion cooperates with the second positioning portion to limit the circumferential position of the central axis and the core unit; wherein the mating surface of the first positioning portion and the second positioning portion is an arc surface.

[0007] According to the core assembly of the utility model, by making the matching surface of the first positioning part and the second positioning part an arc-shaped surface, the matching surface of the first positioning part and the second positioning part in the circumferential direction is made larger, and the transition between the first positioning part and the second positioning part in the circumferential direction is made smoother, so that the shear force-bearing surface between the first positioning part and the second positioning part is larger and the stress concentration problem can be avoided, and the shear force-bearing capacity of the first positioning part and the second positioning part is improved, so that the first positioning part and / or the second positioning part are not easily damaged when the core assembly is working, thereby extending the service life of the core assembly. At the same time, the structural strength of the core unit or the center axis can be improved through the above-mentioned arrangement, thereby improving the structural strength of the core assembly.

[0008] According to some embodiments of the present invention, the distance from the arc surface to the outer peripheral wall of the central axis or the inner peripheral wall of the core unit first increases and then decreases in the circumferential direction.

[0009] According to some embodiments of the present invention, the first positioning portion is integrally formed with the central axis, or the second positioning portion is integrally formed with the core unit.

[0010] According to some embodiments of the utility model, one of the first positioning portion and the second positioning portion is configured as a limiting groove, and the other of the first positioning portion and the second positioning portion is configured as a limiting protrusion, and the limiting protrusion is accommodated in the limiting groove to limit the circumferential rotation of the center axis and the core unit.

[0011] According to some embodiments of the present utility model, the limiting protrusion is configured as an arc-shaped protrusion extending radially away from the central axis.

[0012] According to some embodiments of the present utility model, the central axis includes: a first split part, an end face of the first split part is formed with a mounting hole, an outer peripheral wall of the first split part is formed with a first groove section extending in the axial direction, and the first groove section is connected to the mounting hole; a second split part, the second split part is arranged at one end of the first split part away from the mounting hole, the outer peripheral wall of the second split part is formed with a second groove section extending in the axial direction, and the second groove section is connected to the first groove section; wherein the width of the first groove section gradually decreases in the direction away from the mounting hole.

[0013] According to some embodiments of the present utility model, the central axis also includes: a third split portion, the third split portion is arranged between the first split portion and the second split portion, the outer peripheral wall of the third split portion is formed with a third groove segment extending in the axial direction, and the width of the third groove segment gradually decreases in the direction away from the first groove segment.

[0014] According to some embodiments of the present utility model, the limiting protrusion and the limiting groove are transitionally matched.

[0015] According to some embodiments of the utility model, a first transition section is formed at the end of the central axis, the surface of the first transition section is respectively connected to the end face of the central axis and the outer peripheral surface of the central axis, and the diameter of the first transition section gradually decreases in the direction toward the end face of the central axis; and / or a second transition section is formed at the end of the core unit, the surface of the second transition section is respectively connected to the end face of the core unit and the inner wall surface of the core unit, and the diameter of the second transition section gradually increases in the direction toward the end face of the core unit.

[0016] The following briefly describes a linear motor according to another embodiment of the present invention.

[0017] The linear motor according to the utility model includes the core assembly described in any one of the above embodiments. Since the linear motor according to the utility model is provided with the core assembly of the above embodiments, the core assembly of the linear motor has high precision and high strength, so that the linear motor has good working stability and long service life.

[0018] The following briefly describes a suspension system according to another embodiment of the present invention.

[0019] The suspension system according to the utility model includes the linear motor described in any one of the above embodiments. Since the suspension system according to the utility model is provided with the linear motor of the above embodiments, the suspension system has good working stability and a long service life.

[0020] A vehicle according to another embodiment of the present invention will be briefly described below.

[0021] The vehicle according to the utility model includes the suspension system described in any one of the above embodiments. Since the vehicle according to the utility model is provided with the suspension system of the above embodiments, the suspension system of the vehicle has good working stability and a long service life, so that the vehicle has good vibration reduction effect and low maintenance cost.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a cross-sectional view of a linear motor according to an embodiment of the utility model;

[0025] Figure 2It is a schematic diagram of the assembly of the central shaft and the core unit according to an embodiment of the utility model;

[0026] Figure 3 is a top view of the center axis and the core unit according to an embodiment of the utility model;

[0027] Figure 4 is a cross-sectional view of a central axis and an iron core unit according to an embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the central axis according to an embodiment of the utility model.

[0029] Reference numerals: 1000, linear motor; 1, core assembly;

[0030] 10, central axis; 11, first split part; 111, first slot section; 12, second split part; 121, second slot section; 13, third split part; 131, third slot section;

[0031] 20. Iron core unit; 21. Limiting protrusion; 22. Winding slot;

[0032] 30. Secondary unit. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the related art, the motor mostly uses a square keyway structure, and a slotted structure is opened on both mating surfaces, and the key piece is manufactured and inserted separately. In some existing technologies, a keyway and a balancing keyway are set on the center shaft of the motor, and the rotor core is mounted on the center shaft. This structure is simple and effective, which greatly reduces the balancing blocks that need to be welded on the rotor in the later stage, improves the overall symmetry of the motor, and reduces the workload of dynamic balancing. However, it uses a separate square key piece, and both the rotor core and the center shaft are slotted. The mating shear surface between the square key piece and the rotor core and the center shaft is small, so that the stress is more concentrated during mating, which can easily cause deformation or even breakage of the rotor core, the center shaft and / or the square key piece.

[0039] Reference below Figure 1-Figure 5 The core assembly 1 for a linear motor 1000 according to an embodiment of the present invention is described.

[0040] like Figure 1-Figure 5 As shown, according to the utility model, the core assembly 1 includes: a central axis 10, a core unit 20, the outer peripheral wall of the central axis 10 is provided with a first positioning portion extending along the axial direction, the core unit 20 is sleeved on at least part of the outer periphery of the central axis 10, and the inner peripheral wall of the core unit 20 is provided with a second positioning portion suitable for cooperating with the first positioning portion, and the first positioning portion cooperates with the second positioning portion to limit the circumferential position of the central axis 10 and the core unit 20; wherein the mating surface of the first positioning portion and the second positioning portion is an arc surface.

[0041] In some embodiments, the core assembly 1 can be applied to a linear motor 1000. In this case, the core unit 20 is constructed as the primary unit (i.e., the stator) of the linear motor 1000. The linear motor also includes a secondary unit 30, which is sleeved on the outer periphery of the core unit 20 and can move axially relative to the core unit 20. In other embodiments, the core assembly 1 can be applied to an inner rotor motor. In this case, the core unit 20 can be constructed as the rotor of the inner rotor motor. The inner rotor motor also includes a stator, which is sleeved on the outer periphery of the core unit 20 and can rotate circumferentially relative to the stator. In other embodiments, the core assembly 1 can be applied to an outer rotor motor. In this case, the core unit 20 can be constructed as the stator of the outer rotor motor. The outer periphery of the core unit 20 is sleeved with a rotor, and the rotor can rotate circumferentially relative to the core unit 20. No limitation is made here.

[0042] It is worth noting that the outer circumferential wall of the center axis 10 of the present application is provided with a first positioning portion extending in the axial direction, and the inner circumferential wall of the core unit 20 is provided with a second positioning portion extending in the axial direction. After the core unit 20 is sleeved on the center axis 10, its second positioning portion cooperates with the first positioning portion to limit the relative rotation of the core unit 20 and the center axis 10 in the circumferential direction.

[0043] It can be understood that the mating surfaces of the first positioning portion and the second positioning portion are arc-shaped surfaces. Therefore, compared with the vertical surface of the traditional square key piece, the arc-shaped surface has a larger mating area in the circumferential direction (only the side wall of the square key piece cooperates with the groove in the circumferential direction), so that the shear force surface between the center axis 10 and the core unit 20 is larger, so that the first positioning portion and / or the second positioning portion are not easily damaged when the core assembly 1 is working, thereby extending the service life of the core assembly 1.

[0044] At the same time, compared with the vertical surface of the traditional square key sheet, the arc surface makes the first positioning portion and the second positioning portion fit more closely and transition more evenly in the circumferential direction, making the assembly of the central axis 10 and the core unit 20 simpler, and at the same time can improve the positioning accuracy of the central axis 10 and the core unit 20 in the circumferential direction. It is worth noting that the cross-section of the arc surface can be a sector, a circle, an ellipse, an arc, a semicircle or a spline curve, etc., which is not limited here.

[0045] It is worth mentioning that the mating surfaces of the first positioning portion and the second positioning portion are constructed as an arc-shaped surface, so that when the first positioning portion and the second positioning portion are subjected to shear force, the shear force they are subjected to acts on the root of the first positioning portion or the second positioning portion (that is, the connection between the first positioning portion and the central axis 10, or the connection between the second positioning portion and the core unit 20). Since the width of the first positioning portion or the second positioning portion is the widest, the stress it is subjected to is more dispersed, thereby making the first positioning portion or the second positioning portion better able to withstand shear force, thereby avoiding deformation or even breakage of the first positioning portion and / or the second positioning portion.

[0046] At the same time, the mating surface between the first positioning portion and the second positioning portion is an arc-shaped surface. Compared with the traditional square key plate solution, the present application can reduce the opening area of ​​the core unit 20 or the center axis 10, thereby improving the structural strength of the core unit 20 or the center axis 10, thereby improving the structural strength of the core assembly.

[0047] According to the core assembly 1 involved in the utility model, by making the matching surface of the first positioning part and the second positioning part an arc surface, the matching surface of the first positioning part and the second positioning part in the circumferential direction is made larger, and the transition between the first positioning part and the second positioning part in the circumferential direction is made smoother, so that the shear force bearing surface between the first positioning part and the second positioning part is larger and the stress concentration problem can be avoided, the shear force bearing capacity of the first positioning part and the second positioning part is improved, and the first positioning part and / or the second positioning part are not easily damaged when the core assembly 1 is working, thereby extending the service life of the core assembly 1. At the same time, the above-mentioned arrangement can improve the structural strength of the core unit 20 or the center axis 10, thereby improving the structural strength of the core assembly 1.

[0048] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the distance from the arc surface to the outer peripheral wall of the central axis 10 or the inner peripheral wall of the core unit 20 first increases and then decreases in the circumferential direction.

[0049] In some embodiments, one of the first positioning portion and the second positioning portion is configured as a limiting protrusion 21, and one of the second positioning portion and the second positioning portion is configured as a limiting groove. The limiting protrusion 21 is configured as an arc-shaped protrusion, and the matching surface between the limiting protrusion 21 and the limiting groove is configured as an arc-shaped surface.

[0050] It can be understood that, through the above-mentioned arrangement, both ends of the limiting protrusion 21 in the circumferential direction are constructed as arcs, so that both ends of the limiting protrusion 21 in the circumferential direction can transition more evenly with the limiting groove, making the assembly of the center axis 10 and the core unit 20 simpler, and can improve the positioning accuracy of the center axis 10 and the core unit 20 in the circumferential direction, and at the same time can further increase the matching area of ​​the limiting protrusion 21 and the limiting groove.

[0051] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the first positioning portion is integrally formed with the central shaft 10 , or the second positioning portion is integrally formed with the core unit 20 .

[0052] It can be understood that in the solution using a separate key sheet, a groove is provided between the core unit and the center axis, there is an assembly tolerance between the key sheet and the groove on the core unit, and there is also an assembly tolerance between the key sheet and the center axis. The combination of the above two results in a larger assembly tolerance between the core unit and the center axis, resulting in low assembly accuracy of the core assembly. At the same time, since both the core unit and the center axis are provided with grooves, the grooves of the two will respectively reduce the strength of the core unit and the center axis, thereby resulting in low strength of the core assembly.

[0053] In some embodiments, the first positioning portion is integrally formed with the center shaft 10. Thus, when the center shaft 10 and the core unit 20 are assembled, there is only an assembly tolerance between the first positioning portion and the core unit 20, so that the assembly tolerance of the core assembly 1 is small. Moreover, since the first positioning portion is integrally formed with the center shaft 10, it is possible to avoid opening a groove in the center shaft 10, so that the structural strength of the center shaft 10 is high, thereby improving the structural strength of the core assembly 1.

[0054] In other embodiments, the second positioning portion is integrally formed with the core unit 20. Therefore, when the center axis 10 and the core unit 20 are assembled, only the second positioning portion and the center axis 10 have an assembly tolerance, so that the assembly tolerance of the core assembly 1 is small. Moreover, since the second positioning portion is integrally formed with the core unit 20, it is possible to avoid opening a groove in the core unit 20, so that the structural strength of the core unit 20 is high, thereby improving the structural strength of the core assembly 1.

[0055] It is worth noting that the core unit 20 includes a plurality of punching sheets and windings. The plurality of punching sheets are stacked in the axial direction and the outer circumferences of the plurality of punching sheets are respectively provided with wire grooves. The axial projections of the plurality of wire grooves overlap to jointly construct a winding groove 22. The winding groove 22 is used to accommodate the winding. Since the central axis 10 of the present application and the core unit 20 have better assembly accuracy in the circumferential direction, the above-mentioned arrangement can ensure the degree of overlap of the axial projections of the plurality of wire grooves, thereby avoiding winding bending or even insulation failure.

[0056] According to the core assembly 1 involved in the utility model, the first positioning portion is integrally formed with the center axis 10, or the second positioning portion is integrally formed with the core unit 20, so that the core unit 20 has only one assembly tolerance after being assembled with the center axis 10, thereby making the assembly tolerance of the core assembly 1 small and improving the assembly accuracy of the core assembly 1. At the same time, the structural strength of the center axis 10 or the core unit 20 is high, thereby making the structural strength of the core assembly 1 high. At the same time, the above-mentioned arrangement can reduce the number of parts of the core assembly 1, thereby improving the assembly efficiency of the core assembly 1, and further improving the production efficiency of the motor.

[0057] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, one of the first positioning portion and the second positioning portion is constructed as a limiting groove, and the other of the first positioning portion and the second positioning portion is constructed as a limiting protrusion 21, which is received in the limiting groove to limit the central axis 10 and the core unit 20 from rotating in the circumferential direction.

[0058] In some embodiments, the first positioning portion is configured as a limiting protrusion 21. In this case, the outer peripheral wall of the central shaft 10 is provided with a limiting protrusion 21 extending in the axial direction and protruding from the outer peripheral wall of the central shaft 10 in the radial direction. The limiting protrusion 21 is integrally formed with the central shaft 10, and the inner peripheral wall of the core unit 20 is provided with a limiting groove suitable for accommodating the limiting protrusion 21. Since only the core unit 20 is provided with a groove, only the structural strength of the core unit 20 is reduced, while the structural strength of the central shaft 10 remains unchanged or is improved. Therefore, the structural strength of the core assembly 1 can be improved through the above arrangement.

[0059] In other embodiments, the second positioning portion is configured as a limiting protrusion 21. In this case, the inner peripheral wall of the core unit 20 is provided with a limiting protrusion 21 extending in the axial direction and protruding from the inner peripheral wall of the core unit 20 in the radial direction. The limiting protrusion 21 is integrally formed with the core unit 20, and the outer peripheral wall of the central shaft 10 is provided with a limiting groove suitable for accommodating the limiting protrusion 21. Since only the central shaft 10 is provided with a groove, only the structural strength of the central shaft 10 is reduced, while the structural strength of the core unit 20 remains unchanged or is improved. Therefore, the structural strength of the core assembly 1 can be improved through the above arrangement.

[0060] During assembly, there is only one assembly tolerance between the limiting protrusion 21 and the limiting groove, so that the assembly accuracy of the core assembly 1 is high. At the same time, the above arrangement can avoid the need to separately set a key sheet, thereby reducing the mold opening cost of the core assembly 1, thereby reducing the production cost of the core assembly 1, and the above arrangement can improve the assembly efficiency of the core assembly 1.

[0061] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the limiting protrusion 21 is configured as an arc-shaped protrusion extending away from the central axis 10 in the radial direction.

[0062] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the central axis 10 includes: a first split portion 11 and a second split portion 12, the end face of the first split portion 11 is formed with a mounting hole, the outer peripheral wall of the first split portion 11 is formed with a first groove section 111 extending in the axial direction, the first groove section 111 is connected with the mounting hole, the second split portion 12 is arranged at one end of the first split portion 11 away from the mounting hole, the outer peripheral wall of the second split portion 12 is formed with a second groove section 121 extending in the axial direction, the second groove section 121 is connected with the first groove section 111; wherein the width of the first groove section 111 in the direction away from the mounting hole gradually decreases.

[0063] In some embodiments, the two ends of the first split part 11 in the axial direction are respectively configured as a first end and a second end, the end surface of the first end is provided with a mounting hole, the first split part 11 is provided with a first slot section 111 extending in the axial direction, one end of the first slot section 111 is connected to the mounting hole, and the second end is connected to the second split part 12, the outer peripheral wall of the second split part 12 is provided with a second slot section 121 extending in the axial direction, and the other end of the first slot section 111 is connected to the second slot section 121. It can be understood that when the central shaft 10 and the core unit 20 are assembled, the limiting protrusion 21 on the inner peripheral wall of the core unit 20 is received in the limiting groove through the mounting hole, and the width of the first slot section 111 gradually decreases in the direction away from the mounting hole, thereby, the width of the mounting hole is large, so that the limiting protrusion 21 is easier to pass through the mounting hole, thereby improving the efficiency of the limiting protrusion 21 being received in the second slot section 121, and further improving the assembly efficiency of the central shaft 10 and the core unit 20.

[0064] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the central shaft 10 also includes: a third split portion 13, which is arranged between the first split portion 11 and the second split portion 12, and the outer peripheral wall of the third split portion 13 is formed with a third groove section 131 extending in the axial direction, and the width of the third groove section 131 gradually decreases in the direction away from the first groove section 111.

[0065] It can be understood that the first split portion 11, the third split portion 13 and the second split portion 12 are arranged in sequence in the axial direction, a first groove section 111 is formed on the first split portion 11, a second groove section 121 is formed on the second split portion 12, and a third groove section 131 is formed on the third split portion 13, one end of the first groove section 111 is connected to the mounting hole, the other end of the first groove section 111 is connected to one end of the third groove section 131, and the other end of the third groove section 131 is connected to the second groove section 121.

[0066] One end of the first slot section 111 is connected to the mounting hole and its width gradually decreases in the direction away from the mounting hole, so that the first slot section 111 and the mounting hole are jointly constructed as a flared opening, thereby facilitating the passage of the limiting protrusion 21; the width of the third slot section 131 gradually decreases in the direction away from the first slot section 111, that is, when the limiting protrusion 21 passes through the third slot section 131, the two side walls of the third slot section 131 in the width direction can guide the limiting protrusion 21, so that the limiting protrusion 21 can be smoothly, quickly and accurately accommodated in the second slot section 121, thereby improving the assembly efficiency of the center shaft 10 and the core unit 20.

[0067] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the limiting protrusion 21 and the limiting groove are transitionally matched. It can be understood that the limiting protrusion 21 and the limiting groove can be an interference fit, an adaptive fit or a small clearance fit, etc., which is not limited here. The transitional fit between the limiting protrusion 21 and the limiting groove can make the assembly of the center shaft 10 and the core unit 20 simpler, and can improve the assembly accuracy of the center shaft 10 and the core unit 20 in the circumferential direction. At the same time, the above-mentioned setting can effectively prevent the air gap between the outer peripheral wall of the limiting protrusion 21 and the inner peripheral wall of the limiting groove, thereby preventing the center shaft 10 and the core unit 20 from local overheating, and improving the contact heat transfer capacity of the center shaft 10 and the core unit 20.

[0068] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, a first transition section is formed at the end of the center axis 10, and the surface of the first transition section is respectively connected to the end face of the center axis 10 and the outer peripheral surface of the center axis 10, and the diameter of the first transition section gradually decreases in the direction toward the end face of the center axis 10; and / or a second transition section is formed at the end of the core unit 20, and the surface of the second transition section is respectively connected to the end face of the core unit 20 and the inner wall surface of the core unit 20, and the diameter of the second transition section gradually increases in the direction toward the end face of the core unit 20.

[0069] In some embodiments, a first transition section is provided at one end of the central shaft 10 having a mounting hole, and surfaces of the first transition section are respectively suitable for connecting with the end face of the central shaft 10 and the surface of the outer peripheral wall of the central shaft 10, and the diameter of the first transition section gradually increases in the direction away from the mounting hole. Thus, the first transition section can facilitate the installation of the core unit 20 on the central shaft 10, thereby improving the assembly efficiency of the central shaft 10 and the core unit 20.

[0070] In other embodiments, a second transition section is provided at the end of the core unit 20, and the surfaces of the second transition section are respectively connected to the end face of the core unit 20 and the inner wall surface of the core unit 20, and the diameter of the second transition section gradually increases in the direction toward the end face of the core unit 20. Thus, the second transition section can facilitate the passage of the center axis 10, thereby facilitating the core unit 20 to be sleeved on the center axis 10, thereby improving the assembly efficiency of the center axis 10 and the core unit 20.

[0071] In some other embodiments, a first transition section is provided at one end of the central shaft 10 where a mounting hole is provided, and the diameter of the first transition section gradually decreases in the direction toward the end face of the central shaft 10, and a second transition section is formed at the end of the core unit 20, and the diameter of the second transition section gradually increases in the direction toward the end face of the core unit 20. Therefore, when the central shaft 10 and the core unit 20 are assembled, the first transition section and the second transition section can improve the efficiency of the core unit 20 being sleeved on the central shaft 10, thereby improving the assembly efficiency of the central shaft 10 and the core unit 20.

[0072] The linear motor 1000 according to the present invention is briefly described below.

[0073] According to the utility model, the linear motor 1000 is provided with the core assembly 1 of the above-mentioned embodiment. Since the linear motor 1000 according to the utility model is provided with the core assembly 1 described in any one of the above-mentioned embodiments, the core assembly 1 of the linear motor 1000 has high precision and high strength, so that the linear motor 1000 has good working stability and long service life.

[0074] The suspension system according to the present utility model is briefly described below.

[0075] The suspension system according to the present invention is provided with the linear motor 1000 of the above embodiment. Since the suspension system according to the present invention is provided with the linear motor 1000 described in any one of the above embodiments, the suspension system has good working stability and a long service life.

[0076] The vehicle according to the present utility model is briefly described below.

[0077] The vehicle according to the utility model is provided with the suspension system of the above-mentioned embodiment. Since the vehicle according to the utility model is provided with the suspension system described in any one of the above-mentioned embodiments, the suspension system of the vehicle has good working stability and long service life, so that the vehicle has good vibration reduction effect and low maintenance cost.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0079] Although embodiments of the present invention have been shown and described above, changes, modifications, substitutions and variations may be made to the embodiments described above.

Claims

1. A core assembly, characterized in that: include: A central shaft (10), wherein the outer peripheral wall of the central shaft (10) is provided with a first positioning portion extending in the axial direction; and An iron core unit (20), the iron core unit (20) being sleeved on the central shaft (10), the inner peripheral wall of the iron core unit (20) being provided with a second positioning portion adapted to cooperate with the first positioning portion, the first positioning portion and the second positioning portion cooperating to limit the circumferential position of the central shaft (10) and the iron core unit (20); Wherein, the matching surface of the first positioning portion and the second positioning portion is an arc surface.

2. The core assembly according to claim 1, characterized in that: The distance from the arc-shaped surface to the outer peripheral wall of the central axis (10) or the inner peripheral wall of the core unit (20) first increases and then decreases in the circumferential direction.

3. The core assembly according to claim 1, characterized in that: The first positioning portion is integrally formed with the central shaft (10), or the second positioning portion is integrally formed with the core unit (20).

4. The core assembly according to claim 3, characterized in that: One of the first positioning portion and the second positioning portion is configured as a limiting groove, and the other of the first positioning portion and the second positioning portion is configured as a limiting protrusion (21), wherein the limiting protrusion (21) is received in the limiting groove to limit the rotation of the central shaft (10) and the core unit (20) in the circumferential direction.

5. The core assembly according to claim 4, characterized in that: The limiting protrusion (21) is configured as an arc-shaped protrusion extending away from the central axis (10) in the radial direction.

6. The core assembly according to claim 4, characterized in that: The central axis (10) comprises: A first split part (11), wherein an end surface of the first split part (11) is formed with a mounting hole, an outer peripheral wall of the first split part (11) is formed with a first groove section (111) extending in the axial direction, and the first groove section (111) is communicated with the mounting hole; a second split portion (12), the second split portion (12) being arranged at an end of the first split portion (11) away from the mounting hole, the outer peripheral wall of the second split portion (12) being formed with a second groove section (121) extending in the axial direction, the second groove section (121) being communicated with the first groove section (111); The width of the first slot section (111) gradually decreases in a direction away from the mounting hole.

7. The core assembly according to claim 6, characterized in that: The central shaft (10) further comprises: a third split portion (13), the third split portion (13) being arranged between the first split portion (11) and the second split portion (12), the outer peripheral wall of the third split portion (13) being formed with a third groove section (131) extending in the axial direction, the width of the third groove section (131) gradually decreasing in a direction away from the first groove section (111).

8. The core assembly according to claim 4, characterized in that: The limiting protrusion (21) is transitionally matched with the limiting groove.

9. The core assembly according to claim 1, characterized in that: A first transition section is formed at the end of the central axis (10), the surface of the first transition section is respectively connected to the end face of the central axis (10) and the outer peripheral surface of the central axis (10), and the diameter of the first transition section gradually decreases in a direction toward the end face of the central axis (10); and / or A second transition section is formed at the end of the core unit (20), the surface of the second transition section is respectively connected to the end face of the core unit (20) and the inner wall surface of the core unit (20), and the diameter of the second transition section gradually increases in the direction toward the end face of the core unit (20).

10. A linear motor, characterized in that: It comprises the core assembly (1) as claimed in any one of claims 1 to 9.

11. A suspension system, characterized in that: Comprising the linear motor (1000) as claimed in claim 10.

12. A vehicle, characterized in that: Comprising the suspension system of claim 11.

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