Magnetic core assembly for electric motor, electric motor, suspension system, and vehicle

Abstract

A magnetic core assembly for an electric motor, an electric motor, a suspension system, and a vehicle. The magnetic core assembly for an electric motor comprises a central rod and a magnetic core. In the axial direction of the central rod, the central rod is provided with a first limiting portion and a second limiting portion which are arranged spaced apart. The magnetic core is sleeved outside the central rod and is located between the first limiting portion and the second limiting portion, and each of the first limiting portion and the second limiting portion cooperates with the magnetic core to limit the axial displacement of the magnetic core.

Description

Motor core assembly and motor, suspension system, vehicle

[0001] This application claims priority to Chinese patent application No. 202311867985.3, filed on December 29, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of motors, and in particular to a magnetic core assembly of a motor, a motor, a suspension system, and a vehicle. Background Art

[0003] The magnetic core is an important component of the motor and is installed inside the motor. The magnetic core is used to increase the magnetic flux of the inductor coil to achieve efficient electromagnetic power conversion. Summary of the Invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the related art. To this end, the present disclosure provides a magnetic core assembly for a motor. The magnetic core assembly of the motor prevents the magnetic core from moving relative to the center rod along the axial direction of the center rod by arranging the magnetic core between a first stopper and a second stopper. This facilitates a more stable placement of the magnetic core on the center rod and prevents the magnetic core from falling off the center rod.

[0005] The present disclosure also provides a motor having the magnetic core assembly of the motor.

[0006] The present disclosure also provides a suspension system having the motor.

[0007] The present disclosure also provides a vehicle having the suspension system.

[0008] According to an embodiment of the first aspect of the present disclosure, a magnetic core assembly for a motor includes a center rod and a magnetic core. The center rod is provided with first and second stoppers spaced apart in an axial direction thereof. The magnetic core is sheathed over the center rod, with the magnetic core positioned between the first and second stoppers. The first and second stoppers respectively cooperate with the magnetic core to limit axial displacement of the magnetic core.

[0009] According to the magnetic core assembly of the motor of the embodiment of the present disclosure, by setting the magnetic core between the first limiting portion and the second limiting portion, the magnetic core is prevented from moving relative to the center rod along the axial direction of the center rod, which facilitates the magnetic core to be set on the center rod more firmly and prevents the magnetic core from falling off the center rod.

[0010] In addition, the magnetic core assembly of the motor according to the above embodiment of the present disclosure may also have the following additional technical features:

[0011] According to some embodiments of the present disclosure, one of the first limiting portion and the second limiting portion is an integrally formed part with the center rod.

[0012] According to some embodiments of the present disclosure, the center rod is provided with a protrusion protruding radially outward to define the first limiting portion, and a first corner between the protrusion and the center rod is spaced apart from the magnetic core.

[0013] According to some embodiments of the present disclosure, the second limiting portion is detachably connected to the center rod.

[0014] According to some embodiments of the present disclosure, the second limiting portion is formed as a threaded member, and the threaded member is threadedly engaged with the center rod.

[0015] In some embodiments, the threaded member includes a first portion and a second portion, the first portion is threadedly engaged with the center rod, the axial thickness of the first portion is greater than the axial thickness of the second portion, and at least a portion of the second portion abuts against the magnetic core.

[0016] In some examples, a wiring space is provided between the second portion and the magnetic core.

[0017] In some embodiments, the magnetic core assembly of the motor further includes a buffer component, and a mounting structure that cooperates with the buffer component is formed on the second limiting portion.

[0018] In some examples, the mounting structure is formed at an end of the second limiting portion away from the first limiting portion, the mounting structure is constructed as a groove, the opening of the groove faces the center rod, and at least a portion of the buffer is pressed into the groove.

[0019] According to some embodiments of the present disclosure, at least one of the first limiting portion and the second limiting portion is mounted to an end portion of the central rod and a portion thereof extends into the central rod.

[0020] According to some embodiments of the present disclosure, the center rod and the magnetic core are interference fit.

[0021] According to some embodiments of the present disclosure, the magnetic core assembly of the motor further includes a limiting rod, a first recess is provided on the center rod, a second recess is provided on the magnetic core, and an outer peripheral surface of the limiting rod cooperates with the first recess and the second recess respectively.

[0022] According to some embodiments of the present disclosure, the magnetic core includes a multi-layer iron core, which is stacked in the axial direction of the center rod, with coils provided between adjacent layers of iron cores, and the coils in adjacent layers are electrically connected.

[0023] According to some embodiments of the present disclosure, the first limiting portion and the second limiting portion are in direct contact with the cores located at both ends of the center rod in the multi-layer core, respectively.

[0024] According to some embodiments of the present disclosure, the central rod is provided with a flow channel for circulating a heat exchange medium.

[0025] According to some embodiments of the present disclosure, the flow channel is provided with an inlet and an outlet located at the top of the central rod.

[0026] According to an embodiment of the second aspect of the present disclosure, the motor includes the magnetic core assembly of the motor according to the embodiment of the first aspect of the present disclosure.

[0027] According to the motor of the embodiment of the present disclosure, by utilizing the magnetic core assembly described in the embodiment of the first aspect of the present disclosure, by arranging the magnetic core between the first limiting portion and the second limiting portion, the magnetic core is prevented from moving relative to the center rod along the axial direction of the center rod, which facilitates the magnetic core to be more firmly arranged on the center rod and prevents the magnetic core from falling off from the inside of the motor.

[0028] According to a suspension system of an embodiment of the third aspect of the present disclosure, the suspension system includes the motor according to the embodiment of the second aspect of the present disclosure.

[0029] According to the suspension system of an embodiment of the present disclosure, by utilizing the motor described in the embodiment of the second aspect of the present disclosure, by arranging the magnetic core between the first limiting portion and the second limiting portion, the magnetic core is prevented from moving relative to the center rod along the axial direction of the center rod, which facilitates the magnetic core to be more firmly arranged on the center rod and prevents the magnetic core from falling off from the motor.

[0030] According to a fourth aspect of the present disclosure, a vehicle comprises the suspension system according to the second aspect of the present disclosure.

[0031] According to the vehicle of the embodiment of the present disclosure, by utilizing the suspension system described in the embodiment of the third aspect of the present disclosure, by arranging the magnetic core between the first limiting portion and the second limiting portion, the magnetic core is prevented from moving relative to the center rod along the axial direction of the center rod, which facilitates the magnetic core to be more firmly arranged on the center rod and prevents the magnetic core from falling off from the motor.

[0032] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] FIG1 is a schematic structural diagram of a motor according to an embodiment of the present disclosure.

[0035] FIG2 is a cross-sectional view taken along line AA in FIG1 .

[0036] FIG3 is an enlarged view of the circle B in FIG2 .

[0037] FIG4 is an enlarged view of circle C in FIG2 .

[0038] FIG5 is another schematic structural diagram of a motor according to an embodiment of the present disclosure.

[0039] FIG6 is a cross-sectional view taken along line DD in FIG5.

[0040] FIG. 7 is an enlarged view of circle E in FIG. 6 .

[0041] FIG8 is a partial structural diagram of a motor according to an embodiment of the present disclosure.

[0042] FIG9 is a schematic structural diagram of a magnetic core assembly according to an embodiment of the present disclosure.

[0043] FIG10 is a cross-sectional view of the magnetic core assembly in FIG9 .

[0044] FIG. 11 is a top view of a magnetic core assembly according to an embodiment of the present disclosure.

[0045] FIG12 is an enlarged view of circle F in FIG11 .

[0046] FIG13 is a schematic diagram of a multi-layer core press-fitted onto a center rod according to an embodiment of the present disclosure.

[0047] Figure numerals: motor 1000, magnetic core assembly 100, center rod 10, protrusion 11, flow channel 12, first corner 13, first limiting portion 16, second limiting portion 17, groove 171, first recess 18, magnetic core 20, iron core 21, second corner 211, stop protrusion 22, coil 25, second recess 28, threaded part 30, first part 31, second part 32, wiring space 39, piston part 411, stop part 412, mover assembly 500, housing 51, first stop part 511, second stop part 512, mating part 52, magnetic mating part 53, buffer part 61, limiting rod 62. DETAILED DESCRIPTION

[0048] The following describes in detail embodiments of the present disclosure, examples of which 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 intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0049] The magnetic core is an important component of a motor and is installed inside the motor. However, prolonged use of the motor may cause the magnetic core to fall off. To this end, the embodiments of the present disclosure provide a magnetic core assembly to reduce the risk of magnetic core falling off.

[0050] The magnetic core assembly 100 of the motor 1000 according to an embodiment of the present disclosure will be described below with reference to the accompanying drawings.

[0051] As shown in FIG. 1 to FIG 13 , the magnetic core assembly 100 of the motor 1000 according to the embodiment of the present disclosure includes a center rod 10 and a magnetic core 20 .

[0052] The magnetic core 20 is sleeved on the center rod 10 to set the magnetic core 20 on the center rod 10. For example, along the axial direction of the center rod 10, the center rod 10 is provided with a first limiting portion 16 and a second limiting portion 17 arranged at intervals. The magnetic core 20 is located between the first limiting portion 16 and the second limiting portion 17. The first limiting portion 16 and the second limiting portion 17 respectively cooperate with the magnetic core 20 to limit the axial displacement of the magnetic core 20 to prevent the magnetic core 20 from moving relative to the center rod 10 along the axial direction of the center rod 10. This makes it easier to set the magnetic core 20 on the center rod 10 and prevent the magnetic core 20 from falling off the center rod 10.

[0053] According to the magnetic core assembly 100 of the motor 1000 of the embodiment of the present disclosure, by setting the magnetic core 20 between the first limiting portion 16 and the second limiting portion 17, the magnetic core 20 is prevented from moving relative to the center rod 10 along the axial direction of the center rod 10, which facilitates the magnetic core 20 to be more firmly set on the center rod 10 and prevents the magnetic core 20 from falling off the center rod 10.

[0054] The magnetic core assembly 100 of the motor 1000 according to some embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0055] In some embodiments of the present disclosure, as shown in FIG. 1 to FIG. 7 , a magnetic core assembly 100 of a motor 1000 includes a central rod 10 and a magnetic core 20 .

[0056] In some embodiments of the present disclosure, one of the first limiting portion 16 and the second limiting portion 17 is integrally formed with the center rod 10, which facilitates reducing the number of components of the magnetic core assembly 100 and reducing the complexity of the structure of the magnetic core assembly 100.

[0057] For example, the first limiting portion 16 and the center rod 10 are an integrally formed part. Since the relative position of the first limiting portion 16 and the center rod 10 is unchanged, when the magnetic core 20 is sleeved on the center rod 10, it is convenient to achieve the cooperation between the first limiting portion 16 and the magnetic core 20, so as to use the first limiting portion 16 to limit the position of the magnetic core 20 along the axial direction of the center rod 10.

[0058] In some embodiments of the present disclosure, as shown in FIG2 and FIG3 , the center rod 10 is provided with a radially outwardly protruding protrusion 11 to define one of a first limiting portion 16 and a second limiting portion 17. The protrusion 11 cooperates with the magnetic core 20 to limit the axial displacement of the magnetic core 20. For example, the first corner 13 between the protrusion 11 and the center rod 10 is spaced apart from the magnetic core 20, which facilitates the contact and cooperation between the protrusion 11 and the magnetic core 20, so that the protrusion 11 can limit the axial displacement of the magnetic core 20, and avoids the edge of the magnetic core 20 interfering with the first corner 13 when the magnetic core 20 is sleeved on the center rod 10, thereby affecting the cooperation between the magnetic core 20 and the protrusion 11.

[0059] In addition, the cross-section of the center rod 10 at the raised portion 11 undergoes a sudden change, which causes the stress at the first corner 13 to be greater than the average stress of the center rod 10, so that the first corner 13 is spaced apart from the magnetic core 20, thereby avoiding the interaction force between the magnetic core 20 and the first corner 13, and thus avoiding damage to the center rod 10 due to excessive force at the first corner 13.

[0060] For example, by making the first limiting portion 16 a raised portion 11 and forming the first limiting portion 16 and the center rod 10 as an integrally formed part, the space occupied by the first limiting portion 16 and the center rod 10 can be reduced, thereby reserving a larger space for the magnetic core 20. This, in turn, facilitates maintaining a gap between the magnetic core 20 and other components within the motor 1000, thereby preventing interference between the magnetic core 20 and other components within the motor 1000 and enabling the motor 1000 to smoothly output power. In addition, when the motor 1000 is operating, heat is generated near the magnetic core 20. By reserving a larger space for the magnetic core 20, the heat inside the motor 1000 can be quickly dissipated.

[0061] In some embodiments, the axial direction of the center rod 10 extends in the up and down directions of the drawing, and the protrusion 11 is located at the upper end of the magnetic core 20. The protrusion 11 is engaged with the upper end of the magnetic core 20 to limit the upward movement of the magnetic core 20, thereby preventing the magnetic core 20 from falling off the center rod 10 due to upward movement.

[0062] In some embodiments, as shown in FIG3 , the magnetic core 20 has a second corner 211, and the chamfer at the second corner 211 is larger than the chamfer at the first corner 13, so that the first corner 13 is spaced apart from the second corner 211. The magnetic core 20 and the center rod 10 are subjected to an interference fit, which results in a large assembly stress on the mating surface of the magnetic core 20 and the center rod 10. By spacing the first corner 13 and the second corner 211 apart, the assembly stress of the interference fit is transmitted along the surface rather than along the oblique angle, so that the magnetic core 20 is not subjected to excessive assembly stress at the first corner 13, which is effective in avoiding stress concentration on the magnetic core 20.

[0063] In addition, by spacing the magnetic core 20 from the first corner 13, when the magnetic core 20 is placed on the center rod 10, the upper end of the magnetic core 20 can smoothly contact and cooperate with the lower bottom wall of the protrusion 11, and the protrusion 11 can be used to limit the upward movement of the magnetic core 20.

[0064] In some embodiments of the present disclosure, the second limiting portion 17 is detachably connected to the center rod 10. By installing and disassembling the second limiting portion 17, it is convenient to put the magnetic core 20 on the center rod 10 or remove the magnetic core 20 from the center rod 10.

[0065] In some embodiments of the present disclosure, as shown in Figures 9 and 10, the second limiting portion 17 is formed as a threaded member 30, and an external thread is formed on the center rod 10. The threaded member 30 is threadedly engaged with the center rod 10 so that the threaded member 30 can be detachably set on the center rod 10. In this way, after the magnetic core 20 is axially sleeved on the center rod 10, the threaded member 30 is installed on the center rod 10, so that the threaded member 30 is engaged with the magnetic core 20, so as to limit the displacement of the magnetic core 20 along the axial direction of the center rod 10 after the magnetic core 20 is installed in place.

[0066] In some embodiments of the present disclosure, as shown in Figure 4, the threaded member 30 includes a first part 31 and a second part 32, the first part 31 is threadedly engaged with the center rod 10, and the axial thickness of the first part 31 is greater than the axial thickness of the second part 32, so as to increase the area of ​​threaded engagement between the first part 31 and the center rod 10, thereby facilitating the threaded member 30 to be firmly set on the center rod 10, and at least part of the second part 32 abuts against the magnetic core 20, so as to utilize the threaded member 30 to limit the axial displacement of the magnetic core 20 along the center rod 10.

[0067] In this way, by making the second portion 32 abut against the magnetic core 20 , heat transfer between the second portion 32 and the magnetic core 20 can be achieved, thereby facilitating heat dissipation of the magnetic core 20 inside the motor 1000 .

[0068] As shown in Figures 2 and 4, in this embodiment, the first part 31 is located on the inner side of the second part 32, the first part 31 has an internal thread, the center rod 10 has an external thread, the axial direction of the center rod 10 extends along the up and down direction of the drawing, the axial thickness of the first part 31 extends to H1 along the up and down direction, and the axial thickness of the second part 32 extends to H2 along the up and down direction, H1 is greater than H2, so as to increase the fitting area between the first part 31 and the center rod 10, and thus facilitate the threaded member 30 to be firmly fixed on the center rod 10, so that the threaded member 30 can support the magnetic core 20 and limit the downward displacement of the magnetic core 20.

[0069] It should be noted here that the inner side and the outer side are positions relative to the center rod 10; the first part 31 is closer to the center rod 10, and the second part 32 is farther away from the center rod 10, that is, the first part 31 is closer to the center rod 10 than the second part 32, so the first part 31 is located on the inner side of the second part 32.

[0070] In some embodiments, as shown in Figure 4, a wiring space 39 is provided between the second part 32 and the magnetic core 20 to facilitate external wires to pass through the wiring space 39 and connect to the magnetic core assembly 100, thereby enabling electrical connection between the external controller, power supply and the magnetic core assembly 100.

[0071] As shown in Figures 2 and 4, in this embodiment, the axial direction of the center rod 10 extends in the vertical direction of the drawing, and a threaded member 30 is provided at the lower portion of the center rod 10. The threaded member 30 abuts against the lower end of the magnetic core 20 to limit the downward displacement of the magnetic core 20, thereby preventing the magnetic core 20 from moving downward and falling off the center rod 10. For example, the lower end of the magnetic core 20 has an abutment protrusion 22 that protrudes downward from the lower wall surface of the magnetic core 20. The abutment protrusion 22 abuts against the upper end surface of the second portion 32 to define a wiring space 39 between the lower wall surface of the magnetic core 20 and the upper end surface of the second portion 32.

[0072] In some embodiments, the inner portion of the magnetic core 20 has an interference fit with the center rod 10, and a large assembly stress is generated on the mating surface between the inner portion of the magnetic core 20 and the center rod 10. The first portion 31 is threadedly fitted with the center rod 10, and a large assembly stress is generated on the threaded connection surface between the first portion 31 and the center rod 10. By spacing the inner portion of the magnetic core 20 and the first portion 31, the force between the inner portion of the magnetic core 20 and the first portion 31 can be avoided, thereby avoiding damage to the inner portion of the magnetic core 20 due to excessive force, and avoiding damage to the first portion 31 due to excessive force.

[0073] In some embodiments of the present disclosure, as shown in Figure 8, the magnetic core assembly 100 also includes a buffer 61, and an installation structure that cooperates with the buffer 61 is formed on the second limiting portion 17. When the magnetic core assembly 100 moves, the buffer 61 is configured to buffer the impact on the end of the magnetic core assembly 100 to avoid the end of the magnetic core assembly 100 from being subjected to rigid impact, thereby protecting the end of the magnetic core assembly 100.

[0074] As shown in Figure 8, in this embodiment, the buffer 61 is arranged at the lower end of the second limit portion 17. The buffer 61 is configured to buffer the impact force applied to the lower end of the magnetic core assembly 100, and when the buffer 61 is subjected to the impact force, at least a portion of the buffer 61 is deformed without being displaced or tilted relative to the second limit portion 17. In this way, when the magnetic core assembly 100 jumps up and down, the magnetic core assembly 100 is prevented from being subjected to uneven force due to the movement of the buffer 61, thereby ensuring the stable operation of the motor 1000.

[0075] In some embodiments of the present disclosure, as shown in Figure 8, the mounting structure is formed at the end of the second limiting portion 17 away from the first limiting portion 16, and the mounting structure is constructed as a groove 171, the opening of the groove 171 faces the center rod 10, and at least a portion of the buffer 61 is pressed into the groove 171. For example, a portion of the buffer 61 or the entire buffer 61 may be pressed into the groove 171. In this way, the buffer 61 can be fixed at the end of the second limiting portion 17 away from the first limiting portion 16, so that the buffer 61 can buffer the impact force received by the lower end of the magnetic core assembly 100.

[0076] As an alternative, in some embodiments of the present disclosure, as shown in Figures 5 and 6, at least one of the first limiting portion 16 and the second limiting portion 17 is installed to the end of the center rod 10 and a portion extends into the center rod 10, so that at least one of the first limiting portion 16 and the second limiting portion 17 can be detachably set in the center rod 10. In this way, after the magnetic core 20 is axially sleeved on the center rod 10, at least one of the first limiting portion 16 and the second limiting portion 17 is installed on the center rod 10 to limit the axial displacement of the magnetic core 20 along the center rod 10 after the magnetic core 20 is installed in place.

[0077] In some embodiments, as shown in Figures 6 and 7, the second limiting portion 17 is mounted to the end of the center rod 10 and a portion thereof extends into the center rod 10. The second limiting portion 17 includes a piston portion 411 and a stop portion 412. The stop portion 412 is fixed to the outer periphery of the piston portion 411 (such as the outer periphery of the lower end of the piston portion 411). The piston portion 411 is made of an elastic material. When the piston portion 411 is extended into the center rod 10, the piston portion 411 is elastically deformed and compressed to form an interference fit with the interior of the center rod 10, thereby fixing the piston portion 411 and the stop portion 412 on the center rod 10. For example, the stop portion 412 protrudes from the piston portion 411 in the radial direction of the center rod 10. The stop portion 412 cooperates with the magnetic core 20 to limit the displacement of the magnetic core 20 along the axial direction of the center rod 10.

[0078] In other embodiments, the second limiting portion 17 is installed to the end of the center rod 10 and a portion of it extends into the center rod 10, the second limiting portion 17 has an external thread, the center rod 10 has an internal thread, the second limiting portion 17 extends into the center rod 10 and is threadedly engaged with the center rod 10 to fix the second limiting portion 17 on the center rod 10, so that the second limiting portion 17 can be used to limit the axial position of the magnetic core 20 on the center rod 10.

[0079] In some embodiments, the center rod 10 is formed as a hollow member, which facilitates reducing the mass of the center rod 10 and further facilitates achieving a lightweight design of the magnetic core assembly 100 .

[0080] In some examples, as shown in FIG6 , the center rod 10 defines a flow channel 12 for circulating a heat exchange medium. When the heat exchange medium flows in the flow channel 12, it can remove heat generated by the magnetic core assembly 100, thereby cooling the magnetic core assembly 100. The piston portion 411 extends into the flow channel 12 and forms an interference fit with the flow channel 12 to seal the flow channel 12.

[0081] In some embodiments of the present disclosure, the center rod 10 and the magnetic core 20 are interference fit to limit the radial movement of the magnetic core 20 along the center rod 10, thereby preventing the magnetic core 20 from shaking on the center rod 10 along the radial direction of the center rod 10, thereby reducing the possibility of the magnetic core 20 falling off the center rod 10.

[0082] In some embodiments of the present disclosure, as shown in Figures 11 to 13, the magnetic core assembly 100 also includes a limiting rod 62, a first recess 18 is provided on the center rod 10, and a second recess 28 is provided on the magnetic core 20. The outer peripheral surface of the limiting rod 62 cooperates with the first recess 18 and the second recess 28 respectively. When the magnetic core 20 and the center rod 10 have a tendency to rotate relative to each other, the limiting rod 62 can limit the rotation of the magnetic core 20 and the center rod 10 to avoid relative rotation between the magnetic core 20 and the center rod 10.

[0083] In some embodiments, as shown in Figure 13, the length direction of the first recess 18 on the center rod 10 extends along the up and down direction of the center rod 10, and the length direction of the limiting rod 62 extends along the up and down direction of the center rod 10. The limiting rod 62 is arranged in the first recess 18 (for example, the limiting rod 62 is bonded to the first recess 18), and a portion of the outer circumferential surface of the limiting rod 62 is in contact with the wall surface of the first recess 18. When the magnetic core 20 is placed on the center rod 10, the limiting rod 62 is arranged relative to the second recess 28 on the magnetic core 20. On the one hand, the relative position of the center rod 10 and the magnetic core 20 can be positioned, and on the other hand, the limiting rod 62 can be used to guide the moving direction of the magnetic core 20.

[0084] In some examples, the limiting rod 62 is formed into a cylindrical shape, and the projections of the first recess 18 and the second recess 28 in the upper and lower directions of the center rod 10 form a circle, so that the outer peripheral wall of the limiting rod 62 fits with the first recess 18 and the second recess 28, thereby limiting the relative rotation of the center rod 10 and the magnetic core 20.

[0085] For example, the projections of the first recess 18 and the second recess 28 in the vertical direction of the center rod 10 may be semicircles with the same radius, so that the projections of the first recess 18 and the second recess 28 in the vertical direction form a circle.

[0086] In some other embodiments, a groove and a protrusion may be provided on the center rod 10 and the magnetic core 20, respectively. For example, the groove may be provided on one of the center rod 10 and the magnetic core 20, and a protrusion matching the groove may be provided on the other of the center rod 10 and the magnetic core 20. In this way, the relative rotation of the center rod 10 and the magnetic core 20 can be restricted by the cooperation between the groove and the protrusion.

[0087] In some embodiments of the present disclosure, as shown in FIG2 , the magnetic core 20 includes a multilayer iron core 21, which is stacked in the axial direction of the center rod 10. Coils 25 are provided between adjacent layers of the iron core 21. The coils 25 of adjacent layers are electrically connected. When the coils 25 are energized, a magnetic field is generated near the magnetic core 20. The magnetic field is configured to magnetically couple with other components of the motor 1000 to achieve power output of the motor 1000. The magnetic core 20 is composed of multiple layers of iron core 21, which reduces manufacturing difficulty and facilitates the placement of the coils 25 within the magnetic core 20, thereby generating a uniform magnetic field near the magnetic core 20 when the coils 25 are energized.

[0088] For example, the multi-layer iron core 21 and the multi-layer coil 25 constitute the magnetic core 20 , which facilitates the lightweight design of the magnetic core 20 .

[0089] In some embodiments, the iron core 21 is made of a magnetic conductive material such as iron, cobalt, or nickel to make the iron core 21 magnetic, and the center rod 10 is made of a non-magnetic material to prevent the center rod 10 from affecting the magnetic circuit of the magnetic core 20 .

[0090] In some embodiments, the iron core 21 is externally mounted on the center rod 10 and has an interference fit with the center rod 10 , which facilitates heat transfer between the center rod 10 and the iron core 21 , thereby facilitating heat dissipation of the magnetic core assembly 100 .

[0091] In some embodiments of the present disclosure, when the magnetic core 20 includes multiple layers of iron cores 21, the first limiting portion 16 and the second limiting portion 17 are in direct contact with the iron cores 21 located at both ends of the center rod 10, respectively, to limit the axial displacement of the iron cores 21 along the center rod 10. For example, the first limiting portion 16 and the second limiting portion 17 can compress the multiple iron cores 21, thereby limiting the position of the coils 25 using the iron cores 21, thereby enabling the iron cores 21 and the coils 25 to generate a uniform and stable magnetic field.

[0092] For example, multiple iron cores 21 are arranged between the first limiting portion 16 and the second limiting portion 17, and the multiple iron cores 21 are jacketed on the center rod 10 in a layered press-fit manner to limit the axial position of the multiple iron cores 21 on the center rod 10.

[0093] In some embodiments of the present disclosure, as shown in FIG2 , the center rod 10 is provided with a flow channel 12 for circulating a heat exchange medium. When the heat exchange medium flows in the flow channel 12 , it can take away the heat from the magnetic core 20 , thereby cooling the magnetic core assembly 100 .

[0094] In some embodiments, the magnetic core 20 includes multiple iron cores 21, with coils 25 disposed between adjacent iron cores 21. When the coils 25 are energized, heat is generated in the coils 25, which is then transferred to the iron cores 21. For example, the magnetic core 20 is sleeved on the center rod 10 and has an interference fit with the center rod 10 to ensure contact between the magnetic core 20 and the center rod 10, allowing heat from the iron cores 21 to be transferred to the center rod 10. When the heat exchange medium flows in the flow channel 12, it can remove heat from the center rod 10, thereby cooling the iron cores 21 and the coils 25.

[0095] In some embodiments of the present disclosure, the flow channel 12 is provided with an inlet and an outlet located at the top of the center rod 10, so that a heat exchange medium can flow within the flow channel 12, removing heat from the center rod 10 during the flow process, thereby cooling the magnetic core assembly 100. For example, the heat exchange medium can enter the flow channel 12 through the inlet, exchange heat with the center rod 10, and then flow out through the outlet.

[0096] The motor 1000 according to the embodiment of the present disclosure is described below. The motor 1000 according to the embodiment of the present disclosure includes the magnetic core assembly 100 of the motor 1000 according to the above embodiment of the present disclosure.

[0097] According to the motor 1000 of the embodiment of the present disclosure, using the magnetic core assembly 100 of the motor 1000 according to the above embodiment of the present disclosure, by setting the magnetic core 20 between the first limiting portion 16 and the second limiting portion 17, the magnetic core 20 is prevented from moving relative to the center rod 10 along the axial direction of the center rod 10, which facilitates the magnetic core 20 to be more firmly set on the center rod 10 and prevents the magnetic core 20 from falling off the center rod 10.

[0098] In some embodiments of the present disclosure, the magnetic core assembly 100 is the stator component of the motor 1000. The motor 1000 also includes a movable component 500. The movable component 500 and the magnetic core assembly 100 are magnetically coupled. After the magnetic core assembly 100 is energized, the changing magnetic field generated by the magnetic core assembly 100 can drive the movable component 500 to move, and the motor 1000 outputs power through the movable component 500.

[0099] As shown in Figure 2, in this embodiment, the movable subassembly 500 includes a shell 51 and a magnetic matching part 53. The shell 51 defines an accommodating cavity. The magnetic matching part 53 is fixed to the inner wall of the accommodating cavity. The magnetic core 20 is located in the accommodating cavity and the magnetic core 20 and the magnetic matching part 53 are at least partially arranged opposite each other. When the magnetic core assembly 100 is energized and a changing magnetic field is generated, the magnetic matching part 53 is driven to move. When the magnetic matching part 53 moves, it drives the shell 51 to move. A matching part 52 is provided at the end of the shell 51. The matching part 52 is configured to be connected to an external component. When the shell 51 moves, it drives the matching part 52 to move and outputs power through the matching part 52.

[0100] The magnetic matching member 53 includes but is not limited to a permanent magnet or an electromagnet, as long as it can match with the coil 25 to generate relative movement.

[0101] In some embodiments, driven by the magnetic field, the movable subassembly 500 moves along the axial direction of the center rod 10, and the shell 51 includes a first stop portion 511 and a second stop portion 512. The first stop portion 511 is configured to stop against the first limiting portion 16, and the second stop portion 512 is configured to stop against the second limiting portion 17 to limit the moving path of the movable subassembly 500 and prevent the movable subassembly 500 from separating from the magnetic core assembly 100.

[0102] As shown in Figure 2, in this embodiment, the axial direction of the center rod 10 extends along the up and down direction of the drawing (here, it should be understood that the above direction limitation is only for the convenience of describing the accompanying drawings and will not limit the actual setting position and direction of the core assembly 100 of the motor 1000). The mover assembly 500 can move along the up and down direction relative to the core assembly 100, and the first limiting portion 16 and the second limiting portion 17 are spaced apart along the up and down direction. The first limiting portion 16 is located above the second limiting portion 17, and the magnetic core 20 is located between the first limiting portion 16 and the second limiting portion 17.

[0103] The first stop 511 is located above the first limiting portion 16, and the second stop 512 is located below the second limiting portion 17. When the movable subassembly 500 moves downward relative to the magnetic core assembly 100, the distance between the first stop 511 and the first limiting portion 16 decreases. When the first stop 511 abuts against the upper end of the first limiting portion 16, the movable subassembly 500 cannot move further downward. When the movable subassembly 500 moves upward relative to the magnetic core assembly 100, the distance between the second stop 512 and the second limiting portion 17 decreases. When the second stop 512 abuts against the lower end of the second limiting portion 17, the movable subassembly 500 cannot move further downward.

[0104] The following describes a suspension system according to an embodiment of the present disclosure. The suspension system according to an embodiment of the present disclosure includes the motor 1000 according to the above-described embodiment of the present disclosure.

[0105] According to the suspension system of the embodiment of the present disclosure, using the motor 1000 according to the above embodiment of the present disclosure, by setting the magnetic core 20 between the first limiting portion 16 and the second limiting portion 17, the magnetic core 20 is prevented from moving relative to the center rod 10 along the axial direction of the center rod 10, which facilitates the magnetic core 20 to be more firmly set on the center rod 10 and prevents the magnetic core 20 from falling off the center rod 10.

[0106] A vehicle according to an embodiment of the present disclosure is described below. The vehicle according to an embodiment of the present disclosure includes the suspension system according to the above-described embodiment of the present disclosure.

[0107] According to the vehicle of the embodiment of the present disclosure, by utilizing the suspension system according to the above-mentioned embodiment of the present disclosure, by setting the magnetic core 20 between the first limiting portion 16 and the second limiting portion 17, the magnetic core 20 is prevented from moving relative to the center rod 10 along the axial direction of the center rod 10, which facilitates the magnetic core 20 to be more firmly set on the center rod 10 and prevents the magnetic core 20 from falling off the center rod 10.

[0108] Other configurations and operations of the vehicle according to the embodiment of the present disclosure are well known to those skilled in the art and will not be described in detail here.

[0109] In the description of the present disclosure, 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", "axial", "radial", "circumferential" 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 disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "multiple" means two or more. In the description of the present disclosure, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0110] In the description of the present disclosure, “above”, “above” and “on” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0111] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0112] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. 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 any one or more embodiments or examples.

[0113] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A magnetic core assembly (100) of an electric machine, comprising: A central rod (10), along the axial direction of the central rod (10), the central rod (10) is provided with a first limiting portion (16) and a second limiting portion (17) which are arranged at intervals; A magnetic core (20), the magnetic core (20) is sleeved on the central rod (10), the magnetic core (20) is located between the first limiting portion (16) and the second limiting portion (17), and the first limiting portion (16) and the second limiting portion (17) are respectively matched with the magnetic core (20) to limit the axial displacement of the magnetic core (20).

2. The magnetic core assembly (100) of the electric machine according to claim 1, wherein, One of the first limiting portion (16) and the second limiting portion (17) and the central rod (10) are integrally formed.

3. The magnetic core assembly (100) of the motor according to claim 2, wherein, The central rod (10) is provided with a convex portion (11) protruding radially outwards to define the first limiting portion (16), and a first corner (13) between the convex portion (11) and the central rod (10) is spaced from the magnetic core (20).

4. The magnetic core assembly (100) of the electric machine according to claim 1, wherein, The second limiting portion (17) is detachably connected to the central rod (10).

5. The magnetic core assembly (100) of the motor according to claim 4, wherein, The second limiting portion (17) is formed as a threaded member (30), and the threaded member (30) is in threaded cooperation with the central rod (10).

6. The magnetic core assembly (100) of the motor according to claim 5, wherein, The threaded member (30) includes a first portion (31) and a second portion (32), the first portion (31) is in threaded cooperation with the central rod (10), the axial thickness of the first portion (31) is greater than the axial thickness of the second portion (32), and at least a part of the second portion (32) abuts against the magnetic core (20).

7. The magnetic core assembly (100) of the electric machine according to claim 6, wherein, A wiring space (39) is provided between the second portion (32) and the magnetic core (20).

8. The magnetic core assembly (100) of the electric machine according to claim 4, further comprising a buffer member (61), and an installation structure cooperating with the buffer member (61) is formed on the second limiting portion (17).

9. The magnetic core assembly (100) of the electric machine according to claim 8, wherein, The installation structure is formed at one end of the second limiting portion (17) away from the first limiting portion (16), the installation structure is configured as a groove (171), the opening of the groove (171) faces the central rod (10), and at least a part of the buffer member (61) is press-fitted into the groove (171).

10. The magnetic core assembly (100) of the electric machine according to claim 1, wherein, At least one of the first limiting portion (16) and the second limiting portion (17) is installed at the end of the central rod (10) and a part thereof extends into the central rod (10).

11. The magnetic core assembly (100) of an electric machine according to any one of claims 1-10, wherein, The central rod (10) and the magnetic core (20) are in interference fit.

12. The magnetic core assembly (100) of the electric machine according to claim 11, further comprising a limiting rod (62), a first recess (18) is provided on the central rod (10), a second recess (28) is provided on the magnetic core (20), and the outer peripheral surface of the limiting rod (62) is respectively matched with the first recess (18) and the second recess (28).

13. The magnetic core assembly (100) of an electric machine according to any one of claims 1-12, wherein, The magnetic core (20) includes a multi-layer iron core (21), and the multi-layer iron core (21) is stacked in the axial direction of the center rod (10). A coil (25) is provided between adjacent layers of the iron core (21), and the coils (25) of adjacent layers are electrically connected.

14. The magnetic core assembly (100) of the electric machine according to claim 13, wherein, The first limiting portion (16) and the second limiting portion (17) are in direct contact with the iron cores (21) located at both ends of the center rod (10) in the multi-layer iron core (21), respectively.

15. The magnetic core assembly (100) of an electric machine according to any one of claims 1-14, wherein, The center rod (10) is provided with a flow channel (12) for circulating a heat exchange medium.

16. The magnetic core assembly (100) of the electric machine according to claim 15, wherein, The flow channel (12) is provided with an inlet and an outlet at the top of the center rod (10).

17. An electric machine (1000) comprising a magnetic core assembly (100) of the electric machine according to any one of claims 1-16.

18. A suspension system comprising the electric machine (1000) according to claim 17, wherein the electric machine (1000) is a linear electric machine (1000).

19. A vehicle comprising the suspension system according to claim 18.

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