Primary components, linear motors, electromagnetic shock absorbers, and vehicles

Abstract

A vehicle equipped with an electromagnetic shock absorber is disclosed. The electromagnetic shock absorber includes a linear motor. The linear motor includes primary components including a primary core, a partition, and a water inlet pipe. A hollow cavity is provided within the primary core. The partition is at least partially located within the hollow cavity, forming a first chamber with one end sealed. The partition includes a cylindrical body. An annular cavity is provided between the cylindrical body and the inner wall of the primary core, and the annular cavity is located within the first chamber. The outlet end of the water inlet pipe is located within the annular cavity.

Description

Technical Field

[0001] Cross-Reference to Related Applications The present application claims priority to Chinese Patent Application No. 202311076469.9 entitled "PRIMARY COMPONENT, LINEAR MOTOR, ELECTROMAGNETIC SHOCK ABSORBER, AND VEHICLE" filed on August 24, 2023, which is incorporated herein by reference in its entirety.

[0002] The present application relates to the field of linear motor technology, and more particularly, to a primary component, a linear motor, an electromagnetic shock absorber, and a vehicle.

Background Art

[0003] Electromagnetic shock absorbers are widely used in new types of intelligent vehicle suspensions. The electromagnetic shock absorber controls the linear motor through electromagnetic induction, generates opposing damping force based on road conditions and driving conditions, so as to suppress vehicle vibration and maintain the stability of the vehicle body. The response speed of the electromagnetic shock absorber can reach up to 1000 Hz, which is 5 times faster than that of traditional shock absorbers, and effectively solves the contradiction between riding comfort and handling performance.

[0004] In the related art, the primary iron core of a linear motor is formed by laminating a plurality of layers of iron core laminations in the axial direction, which results in a complicated manufacturing process, low processing efficiency and high cost. In addition, the sealing structure of the linear motor occupies the axial space of the primary component inside the linear motor, which increases the volume of the linear motor. Furthermore, the cooling structure of the linear motor may increase the space occupied by the linear motor, or the cooling structure is complicated and difficult to implement.

[0005] Therefore, it is necessary to provide new primary components, linear motors, electromagnetic shock absorbers, and vehicles to at least partially solve the above problems. [Overview of the project]

[0006] This application is provided to solve at least one of the aforementioned problems. This application provides a primary component, which includes a primary core having a hollow cavity within it; a partition, which includes a cylindrical body and is at least partially disposed within the hollow cavity, forming a first chamber with one end sealed, wherein an annular cavity is provided between the cylindrical body and the inner wall of the primary core, and the annular cavity is located within the first chamber; and a water inlet pipe, the outlet end of which is disposed within the annular cavity.

[0007] For example, in a primary core, a water inlet and a water outlet are located at one end away from the annular cavity. The water inlet is used to allow an external cooling medium to enter the core or to allow a water inlet pipe to pass through, and the water outlet is used to discharge the cooling medium to the outside of the core.

[0008] For example, the water inlet pipe is constructed as a hollow annular pipe, with an inner and outer cylinder surrounding the water inlet pipe. A gap is provided between the outer cylinder of the annular pipe and the inner wall of the primary iron core, and this gap communicates with the water outlet. A through-hole is provided inside the annular pipe, which communicates with the gap and is located within the annular cavity.

[0009] For example, the water inlet pipe is constructed as a hollow annular pipe, with a gap between the inner cylinder of the annular pipe and the cylindrical partition, the gap communicating with the water outlet, and a through hole provided inside the annular pipe, the through hole communicating with the gap, and the through hole located within the annular cavity.

[0010] For example, the axis of the water outlet coincides with the axis of the hollow cavity.

[0011] For example, the partition further includes an annular base plate, which connects the inner wall of the primary core to one end of the cylindrical body away from the water outlet.

[0012] For example, the distance between one end of the water inlet pipe away from the water inlet and the surface of the annular bottom plate facing the water inlet is less than 5 mm.

[0013] For example, one end of the water inlet pipe away from the water inlet abuts against the surface of the annular base plate facing the water inlet, the surface of the annular base plate facing the water inlet closes the one end of the water inlet pipe away from the water inlet, a through hole is provided in the side wall of the water inlet pipe, and the through hole communicates with the water outlet.

[0014] For example, the distance between the center of the through-hole and the surface of the annular bottom plate facing the water inlet is less than 5 mm.

[0015] For example, a cylindrical body includes a cylindrical plate, and an annular base plate includes a circular ring base plate.

[0016] For example, the cylindrical body further includes a circular top plate, which is connected to one end of the cylindrical body adjacent to the water outlet and closes one end of the cylindrical body.

[0017] For example, in a water inlet pipe, one end away from the water inlet is an inclined end face, and this inclined end face partially contacts the surface of the annular base plate that faces the water inlet.

[0018] For example, the water inlet pipe includes at least two branch water inlet pipes, and the at least two branch water inlet pipes are spaced apart in the circumferential direction of the annular cavity.

[0019] For example, the primary core includes a core body and a hollow core shaft, the hollow core shaft is arranged in a sleeve-like manner within the core body, and the central hole of the hollow core shaft is configured as a hollow cavity.

[0020] For example, the primary component further comprises a plurality of windings. The plurality of windings are arranged axially and continuously on the core body. The water outlet is arranged at one end of the primary core that is away from the annular cavity. The partition comprises an annular bottom plate, and the annular bottom plate is connected to one end of the primary core that is away from the water outlet. The outlet end of the water inlet pipe is arranged adjacent to the annular bottom plate, and the outlet end of the water inlet pipe communicates with the water outlet through a first chamber.

[0021] The present application further provides a linear motor comprising a primary component.

[0022] For example, the linear motor further comprises a secondary component. The secondary component is sleeved outside the primary component.

[0023] For example, the linear motor further comprises that the secondary component comprises a sleeve and a plurality of magnetic steels arranged on an inner side wall of the sleeve, the primary core is cylindrical, and the sleeve is sleeved in the primary core.

[0024] For example, the linear motor further comprises a guide bar. The guide bar is fixed to the sleeve, and the guide bar is movably inserted into the cylindrical body.

[0025] For example, the guide bar, the cylindrical body and the hollow cavity are coaxial.

[0026] The present application further provides an electromagnetic shock absorber comprising a linear motor.

[0027] The present application further provides a vehicle comprising the linear motor or the electromagnetic shock absorber.

[0028] According to the present application, a cavity and a cooling component are arranged in the primary core shaft. This reduces the weight of the linear motor, increases the force density of the linear motor, and improves the cooling effect of the linear motor.

[0029] In order to more clearly explain the technical solutions in the embodiments of the present application, the accompanying drawings required for describing the embodiments are briefly described below. It is obvious that the accompanying drawings in the following description only show some embodiments of the present application, and those skilled in the art can still derive other drawings from these accompanying drawings without creative effort. [Brief Description of the Drawings]

[0030] [Figure 1] FIG. 1 is an overall cross-sectional view of an electromagnetic shock absorber according to an embodiment of the present application. [Figure 2] FIG. 2 is a cross-sectional view of the structure of a linear motor according to an embodiment of the present application. [Figure 3A] FIG. 3 is a cross-sectional view of the structure of a primary component according to an embodiment of the present application. [Figure 3B] FIG. 4 is a cross-sectional view of the structure of a primary component according to an embodiment of the present application. [Figure 3C] FIG. 5 is a cross-sectional view of the structure of a primary component according to an embodiment of the present application. [Figure 3D] FIG. 6 is a cross-sectional view of the structure of a primary component according to an embodiment of the present application. [Figure 4] FIG. 7 is a diagram of windings of a linear motor according to an embodiment of the present application. [Figure 5] FIG. 8 is a diagram of a primary unit according to an embodiment of the present application. [Figure 6] FIG. 9 is a diagram of connection and lead wires of a linear motor according to an embodiment of the present application. [Figure 7] FIG. 10 is a diagram of a sensor of an electromagnetic shock absorber according to an embodiment of the present application. [Figure 8] FIG. 11 is a block diagram of an electromagnetic shock absorber according to an embodiment of the present application. [Figure 9A] FIG. 12 is a block diagram of a vehicle according to an embodiment of the present application. [Figure 9B] FIG. 13 is a block diagram of a vehicle according to another embodiment of the present application.

[0031] In the attached drawings: 1: Electromagnetic shock absorber; 17: Upper mount; 18: Spring; 19: Linear motor; 2: Three-phase lead wire; 3: Sleeve; 4: Magnetic steel; 5: Core unit; 6: Hollow core shaft; 7: Guide bar; 8: Magnetic grid; 9: Sensor reading head; 10: First buffer member; 11: Second buffer member; 12: Partition; 13: Water inlet pipe; 14: Winding; 15: First wire; 15: Second wire; 511: First through hole; 511: Second through hole; 512 :First slot; 512:Second slot; 513:First arrangement member; 513:Second arrangement member; 300:Primary component; 310:Hollow cavity; 311:First chamber; 312:Second chamber; 120:Annular cavity; 121:Cylindrical body; 122:Annular bottom plate; 123:Circular top plate; 130:Gap; 131:Inner cylinder; 132:Outer cylinder; 133:Branching water inlet pipe; 320:Through hole; 321:Water inlet; 322:Water outlet; 61:Core body; 60:Primary iron core; 30:Secondary component, That is the case. [Modes for carrying out the invention]

[0032] To further clarify the purpose, technical solutions, and advantages of this application, exemplary embodiments of this application will be described in detail below with reference to the accompanying drawings. It is clear that the embodiments described are only a selection, and not all, of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. All other embodiments that can be obtained by those skilled in the art without creative effort based on the embodiments of this application are included within the scope of protection of this application.

[0033] The following description provides many specific details to allow for a more complete understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced even without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with this application.

[0034] It should be understood that this application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure may be thorough and complete, and so that the scope of this application may be fully communicated to those skilled in the art.

[0035] The terms used herein are intended solely to describe specific embodiments and are not intended to limit this application. Where used herein, the singular terms “one,” “a,” and “the / this” are intended to include the plural unless explicitly specified otherwise in the context. Furthermore, where used herein, the terms “consist of” and / or “include” specify the presence of the mentioned features, integers, steps, actions, elements, and / or components, and do not exclude the presence or addition of one or more other features, integers, steps, actions, elements, components, and / or groups thereof. Where used herein, the terms “and / or” include any combination of the relevant enumeration items.

[0036] Detailed structures are provided in the following description to illustrate the technical solutions provided herein, in order to fully understand this application. Optional embodiments of this application are described in detail below. However, in addition to these detailed descriptions, this application may have other implementation forms.

[0037] The implementation of this application will be described in detail below with reference to the attached drawings. To the extent that there are no inconsistencies, the following embodiments and features can be combined with each other.

[0038] In one embodiment, as shown in Figures 2, 3A to 3D, and 5, the primary component 300 provided in this application includes a primary core 60, and a hollow cavity 310 is provided within the primary core 60.

[0039] In one embodiment, the primary core 60 includes a core body 61 and a hollow core shaft 6, the hollow core shaft 6 is arranged in a sleeve shape within the core body 61, and the central hole of the hollow core shaft 6 is configured as a hollow cavity 310.

[0040] Furthermore, the primary component 300 further includes a partition 12. The partition 12 is at least partially positioned within the hollow cavity 310 to form a first chamber 311, which is sealed at one end. The partition 12 includes a cylindrical body 121. An annular cavity is provided between the cylindrical body 121 and the inner wall of the primary iron core 60, and the annular cavity 120 is located within the first chamber 311.

[0041] Furthermore, the primary component 300 further includes a water inlet pipe 13. The outlet end of the water inlet pipe 13 is located within the annular cavity 120. The water inlet pipe 13 is configured to provide a cooling medium and is positioned to cool the primary component 300.

[0042] The water inlet pipe 13 may be implemented in the following ways. In one embodiment, as shown in Figure 3D, the water inlet pipe 13 includes at least two branch water inlet pipes 133, the at least two branch water inlet pipes 133 spaced apart in the circumferential direction of the annular cavity 120. In another embodiment, as shown in Figures 3B and 3C, the water inlet pipe 13 is constructed as a hollow annular pipe, with an inner cylinder 131 and an outer cylinder 132 surrounding the annular pipe to form the water inlet pipe 13. As shown in Figure 3C, a gap 130 is provided between the outer cylinder 132 of the annular pipe and the inner wall of the primary core 60, and the gap 130 communicates with the water outlet 322. A through hole 320 is provided inside the annular pipe, the through hole 320 communicates with the gap 130, the gap 130 communicates with the water outlet 322 through the through hole 320, and the through hole 320 is located inside the annular cavity 120. In another embodiment, as shown in Figure 3B, the water inlet pipe 13 is constructed as a hollow annular pipe, with a gap between the inner cylinder 131 of the annular pipe and the cylindrical body of the partition 12, the gap 130 communicating with the water outlet 322, and a through hole 320 provided inside the annular pipe, the through hole 320 communicating with the gap 130, and the through hole 320 located inside the annular cavity 120. It should be noted that the through hole may be provided in the inner pipe or the outer pipe, or in both the inner pipe and the outer pipe.

[0043] In some embodiments, one end of the water inlet pipe 13 away from the water inlet 321 is an inclined end face, which partially abuts the surface of the annular bottom plate 122 facing the water inlet 321. The water inlet pipe 13 may be provided with a through hole, which communicates with an annular cavity.

[0044] In one embodiment, as shown in Figures 3A to 3D, a water inlet 321 and a water outlet 322 are located at one end of the primary core 60 away from the annular cavity 120, the water inlet 321 being used to allow an external cooling medium to enter the primary core 60 or to allow the water inlet pipe 13 to pass through, and the water outlet 322 being used to discharge the cooling medium to the outside of the primary core 60. For example, the axis of the water outlet 322 coincides with the axis of the hollow cavity 310.

[0045] In one embodiment, as shown in Figures 3A to 3D, the partition 12 further includes an annular bottom plate 122, which connects the inner wall of the primary core 60 to one end of the cylindrical body 121 that is away from the water outlet 322. The cylindrical body 121 includes a cylindrical plate, and the annular bottom plate 122 includes a circular ring bottom plate. For example, as shown in Figure 3D, the distance between one end of the water inlet pipe 13 that is away from the water inlet 321 and the surface of the annular bottom plate 122 that faces the water inlet 321 is d3, and d3 is less than 5 mm.

[0046] In one embodiment, as shown in Figures 3B and 3C, one end of the water inlet pipe 13 away from the water inlet 321 abuts against the surface of the annular bottom plate 122 facing the water inlet 321, the surface of the annular bottom plate 122 facing the water inlet 321 closes the one end of the water inlet pipe 13 away from the water inlet 321, a through hole 320 is provided in the side wall of the water inlet pipe 13, and the through hole communicates with the water outlet 322. In other words, the through hole communicates with a space located outside the water inlet pipe within the annular cavity, and further communicates with the water outlet. For example, as shown in Figure 3B, the distance d1 between the center of the through hole 320 and the surface of the annular bottom plate 122 facing the water inlet 321 is less than 5 mm, and as shown in Figure 3C, the distance d2 between the center of the through hole 320 and the surface of the annular bottom plate 122 facing the water inlet 321 is less than 5 mm.

[0047] In one embodiment, the cylindrical body 121 further includes a circular upper plate 123, the circular upper plate 123 being connected to one end of the cylindrical body 121 adjacent to the water outlet 322, thereby closing one end of the cylindrical body 121.

[0048] In one embodiment, as shown in Figures 3A and 3B, the hollow cavity 310 within the primary core 60 is divided into a first chamber 311 and a second chamber 312 by a partition 12, and a water inlet pipe 13 is connected to the vehicle cooling system. Coolant enters through the central water inlet 321 to cool the linear motor and then flows out from the water outlets on both sides, thereby increasing the heat dissipation capacity of the linear motor. Since the primary core 60 has a position for sensors, the partition 12 needs to be designed to seal the primary core 60 and prevent leakage from the upper part of the water inlet pipe 13 to the lower part. The structure of the partition 12 is "Π" shaped, leaving a surrounding area that forms a dead water zone after the water has flowed through the linear motor. This design is still advantageous for heat dissipation of the linear motor compared to an "I" shaped sealing structure. To ensure efficient water absorption, the distance between the water inlet 321 and the top surface of the partition 12 is at least 10 mm.

[0049] In one embodiment, as shown in Figures 3A and 3B, the axis of one of the water inlet 321 and water outlet 322 coincides with the axis of the primary core 60, the water inlet 321 is located in the center of the linear motor's water inlet pipe 13, and the water outlets 322 are located on either side of the water inlet 321. As shown in Figure 3B, if space allows, the pipes on either side may be arranged as water inlets 321, and the central pipe may be arranged as water outlets 322. In this case, there are no dead water areas throughout the water inlet pipe 13, and optimal performance is obtained. To ensure the efficiency of the water inlet pipe 13, a water pump is usually equipped in the water outlet pipe to quickly draw water into the vehicle cooling system and circulate it. The linear motor's water inlet pipe 13 has one water inlet 321 and two water outlets 322. The arrangement of the water inlet 321 and water outlet 322 is preferably such that the axis of one of the water inlet 321 and water outlet 322 coincides with the axis of the primary iron core 60, resulting in a more uniform water cooling effect for the linear motor.

[0050] In one embodiment, when space is limited, the linear motor's water inlet pipe 13 may be provided with only one water inlet 321 and one water outlet 322, and the arrangement is preferably such that the axis of either the water inlet 321 or the water outlet 322 coincides with the axis of the primary core 60. If such an arrangement cannot be guaranteed, it is preferable that the water inlet 321 and the water outlet 322 are symmetrically positioned.

[0051] In one embodiment, the primary iron core 60 may be aligned with the water inlet pipe 13 by 3D printing integration or by screw connection.

[0052] In one embodiment, the primary core 60 may be aligned with the partition 12 by 3D printing integration or by screw connection.

[0053] For example, the primary component 300 further includes a plurality of windings 14. The plurality of windings 14 are arranged axially and continuously on the core body 61. The water outlet 322 is located at the end of the primary core 60 away from the annular cavity 120. The partition 12 includes an annular bottom plate 122, which is connected to one end of the primary core 60 away from the water outlet 322. The outlet end of the water inlet pipe 13 is located close to the annular bottom plate 122, and the outlet end of the water inlet pipe 13 communicates with the water outlet 322 through the first chamber 311. In this way, the cooling medium is in contact with the primary core 60 within the length of the windings 14, allowing the cooling medium to exchange heat with the windings 14 through the primary core 60, thereby cooling the windings 14 more effectively.

[0054] In one embodiment, the core body 61 includes a plurality of core units 5 stacked and connected in the axial direction of a hollow core shaft 6. Each core unit 5 is an annular core unit, and each core unit 5 is sleeve-shaped on the outer circumferential surface of the hollow core shaft 6. The core units 5 are assembled onto the hollow core shaft 6 through interference fits, and annular accommodating grooves are provided between adjacent core units 5. The primary components include a plurality of windings 14 arranged in the accommodating grooves, each winding 14 being arranged in one accommodating groove in the circumferential direction of the core unit 5. For example, the windings 14 are disc-shaped windings with flat coils wound around them, and the plurality of windings 14 are electrically connected to each other. In one embodiment, holes may be provided at appropriate locations within the core units for inserting heat conduction pipes (not shown), while ensuring the performance of the motor. The heat conduction pipes extend upward through the uppermost core unit and connect to a vehicle cooling system outside the linear motor to further enhance the heat dissipation capacity of the linear motor.

[0055] In one embodiment, as shown in Figure 5, the core unit 5 includes an annular primary yoke portion and a primary tooth portion. The primary tooth portion extends radially outward from the primary yoke portion, and the radial thickness of the primary yoke portion is greater than the thickness of the primary tooth portion.

[0056] Refer to Figure 5 again. The first and second placement members 513 are positioned separately on the end faces of the primary yoke portions of adjacent core units 5. The first and second placement members 513 are aligned with each other. One of the first and second placement members 513 is a protruding portion, and the other is a groove. For example, to ensure accuracy during assembly of the core unit 5 and the hollow core shaft 6, the first and second placement members 513 positioned on the primary yoke portion are configured to be circumferentially positioned, and the shapes of the first and second placement members 513 include, but are not limited to, rectangular protrusions and grooves, circular protrusions and grooves, etc.

[0057] Refer to Figure 5 again. A first slot 512 is provided on the first surface of the core unit 5, and a second slot 512 is provided on a second surface of the core unit 5, away from the first surface. The first and second slots 512 of adjacent core units 5 surround a housing groove used to accommodate the winding 14.

[0058] Refer to Figure 5 again. A first limiting member is positioned within the core unit 5, and a second limiting member is positioned within the hollow core shaft 6, with the first and second limiting members aligned with each other. For example, one of the first and second limiting members is a protruding portion, and the other is a groove. The first and second limiting members are configured to fix the core unit 5 in its relative position within the hollow core shaft 6 in the axial direction, thereby preventing relative rotation between the core unit 5 and the hollow core shaft 6. This helps the linear motor generate greater force.

[0059] In one embodiment, in addition to forming the primary core by arranging the core units in a sleeve-like manner on a hollow core shaft, the core units are connected to each other by using an adhesive or by welding to form the primary core.

[0060] In one embodiment, the hollow core shaft 6 includes a support plate and a central shaft. The central shaft has a first end and a second end opposite to the first end. The central shaft has a cavity that extends axially. The support plate is located at the second end of the central shaft and extends radially outward from the central shaft.

[0061] For example, the cross-section of the hollow core shaft 6 is T-shaped, and the support plate is positioned at the second end of the hollow core shaft 6. The support plate can prevent the core unit 5 from falling during the movement of the linear motor. For example, the outer diameter of the support plate is slightly larger than the outer diameter of the core unit 5. In one embodiment, the hollow core shaft may be aligned with the support plate by 3D printing or by screw connection.

[0062] In conclusion, the core body provided in this application is formed by the cooperation of multiple core units. Compared to primary cores formed by laminating silicon steel laminations in related technologies, the primary cores and core units provided in this application are characterized by simpler manufacturing processes and easier installation, reducing manufacturing costs and improving the integration of components.

[0063] In one embodiment, Figure 4 shows the electrical connections between windings 14 according to one embodiment of the present application. Furthermore, a first through-hole 511 and a second through-hole 511 are provided within each core unit. Each winding 14 includes a first lead end located on the inner ring of the winding 14 and a second lead end located on the outer ring of the winding 14. A first wire 15 passes through the first through-hole 511 and is electrically connected to the first lead ends of the two windings 14 located at both ends of the first through-hole 511. A second wire 15 passes through the second through-hole 511 and is electrically connected to the second lead ends of the two windings located at both ends of the second through-hole 511. For example, the first and second through-holes 511 penetrate the core unit axially. The first wire 15 passes through the first through-hole 511 and is electrically connected in series to the different windings. The second wire 15 passes through the second through hole 511 and is electrically connected in series to the different windings.

[0064] In one embodiment, the winding 14 includes a first winding and a second winding, the first winding including a first coil and the second winding including a second coil, where the circumferential winding direction of the first coil is opposite to that of the second coil. For example, for adjacent windings 14, depending on the requirements of the usage scenario, it is determined that the circumferential winding direction of the first coil is clockwise and the circumferential winding direction of the second coil is counterclockwise. Alternatively, the circumferential winding direction of the first coil is counterclockwise and the circumferential winding direction of the second coil is clockwise. The first and second coils are arranged to control the current direction of the winding 14.

[0065] In one embodiment, the winding 14 includes a three-phase winding, which is connected by a star connection. As shown in Figure 2, the linear motor includes three-phase lead wires 2. The three-phase lead wires 2 converge on the top surface of the linear motor and then pass over the upper mount 17 to the outside. Figure 6 is a diagram showing the connection between the three-phase wires and end-face lead wires of a linear motor according to one embodiment of the present application. As shown in Figure 6, the three-phase wires of the linear motor are connected by a star connection. As shown in Figure 6, the windings of the linear motor form a star connection at the primary teeth of the lowest core unit, pass through the primary teeth of the uppermost core unit in the primary core, and then are drawn directly to the outside. The three-phase lead wires are fixed to the top surface of the uppermost primary teeth by injection molding. In addition, the conductive wires of the displacement sensor and the conductive wires of the temperature sensor are similarly fixed to the top surface after being drawn out.

[0066] This application further provides a linear motor including a primary component. In one embodiment, Figure 2 is a cross-sectional view of the structure of a linear motor according to one embodiment of this application. As shown in Figure 2, the linear motor further includes a secondary component 30. The secondary component 30 is sleeve-shaped and located outside the primary component 60. For example, the secondary component 30 includes a sleeve 3 and a plurality of magnetic steels 4 arranged on the inner wall of the sleeve 3, the primary core being cylindrical, and the sleeve 3 being sleeve-shaped and located within the primary core 60. The secondary component 30 is configured to be movable relative to the primary component 300 in the axial direction of the primary component 60. For example, the sleeve 3 is cylindrical. For example, the magnetic steels 4 may be fixed to the inner wall of the sleeve 3 by using an adhesive.

[0067] In one embodiment, the secondary component 30 further includes a guide bar 7. The guide bar 7 is fixed to the sleeve 3 and is movably inserted into the cylindrical body 121. For example, as shown in Figure 2, the guide bar 7 is positioned on the inner surface of the sleeve 3 perpendicular to the axial direction and is movably inserted into the cylindrical body 121. For example, the guide bar 7, the cylindrical body 121, and the hollow cavity 310 are coaxial.

[0068] In one embodiment, a first buffer member 10 corresponding to a support plate of the hollow core shaft 6 is positioned on the inner surface of the sleeve 3 perpendicular to the axial direction. In one embodiment, the support plate is further positioned at the second end of the hollow core shaft 6, and a second buffer member 11 is positioned below the magnetic steel 4, with the second buffer member 11 facing a portion of the surface of the support plate. As the secondary component 30 moves downward, the first surface of the support plate contacts the second buffer member 11 positioned below the magnetic steel 4 to restrict its position and prevent the primary component 300 from detaching from the secondary component 30. As the secondary component 30 moves upward, the first buffer member 10 contacts the second surface of the support plate of the hollow core shaft 6 to restrict its position.

[0069] In one embodiment, the material of the primary component 300 includes a soft magnetic material, and depending on the requirements of the linear motor application scenario, the outer diameter size range of the sleeve 3 is 150 mm or less (e.g., 145 mm, 140 mm, 135 mm, or 130 mm), and the diameter size range of the core unit 5 is 115 mm or less (e.g., 110 mm, 105 mm, 100 mm, or 95 mm). For example, the motor provided in this application can provide a force of up to 7 kN in a short time.

[0070] In one embodiment, as shown in Figures 1 and 2, the linear motor further includes a displacement sensor, which is configured to measure the displacement vectors of primary and secondary components. The displacement sensor includes a magnetic grid sensor, which includes a sensor reading head 9 and a magnetic grid 8. The sensor reading head 9 is located within the cavity of a hollow core shaft 6, and the magnetic grid 8 corresponding to the sensor reading head 9 is located on a guide bar 7. For example, the corresponding sensor reading head 9 and magnetic grid 8 are spaced a predetermined distance apart to ensure the measurement accuracy of the sensor, and the predetermined distance is less than 5 mm.

[0071] In one embodiment, the hollow core shaft 6 is preferably made of a magnetically conductive material and can be used as an additional part of the primary core 60 to improve the performance of the linear motor. In addition, the magnetic field leaking from the core unit 5 is guided outward through the hollow core shaft 6, protecting the sensor reading head 9 inside the shaft from interference. The material for the hollow core shaft 6 includes, but is not limited to, structural steel, tool steel, etc., provided that mechanical properties such as rigidity and hardness are satisfied. The hollow core shaft 6 is arranged in a hollow form to reduce material usage, thereby reducing weight and cost, and allowing the guide bar 7 on which the magnetic grid 8 is installed to slide within the cavity of the hollow core shaft 6. As shown in Figure 2, the sensors are arranged inside the linear motor, the sensor reading head 9 is located inside the hollow core shaft 6 rather than on the bottom surface of the primary core so as not to occupy the stroke of the secondary components of the linear motor, the guide bar 7 on which the magnetic grid 8 is installed, the cylindrical body 121, and the hollow cavity 310 are coaxial, and the housings of the guide bar 7 and the sensor reading head 9 are preferably made of magnetic shielding material to prevent magnetic fields leaking from inside the linear motor 19 from being guided to the vicinity of the sensors and thereby affecting the measurements.

[0072] In one embodiment, the magnetic grid 8 includes a first magnetic grid and a second magnetic grid, the first magnetic grid including a plurality of first magnets arranged axially, and the second magnetic grid including a plurality of second magnets arranged axially. The lengths of the first magnetic grid and the second magnetic grid are the same in the axial direction, but the lengths of the magnetic poles of the first magnets and the magnetic poles of the second magnets are different. In one embodiment, to measure the absolute position of a linear motor in motion, the sensor's magnetic grid uses the first magnetic grid and the second magnetic grid for calculation (the first and second magnets of different lengths generate different magnetic fields, and therefore, the asymmetric design of the first and second magnets, as well as the coordinated calculation of the first and second magnetic grids, may determine that the first and second magnets are on the corresponding magnetic grids).

[0073] In one embodiment, the first magnetic grid and the second magnetic grid are arranged symmetrically on a guide bar and correspond to the sensor reading head.

[0074] In one embodiment, the magnetic grid is a fan-shaped annular structure to ensure that the positional distance between the magnetic grid and the reading head remains unchanged even when relative rotation occurs between the position of the magnetic grid and the position of the reading head during the operation of the linear motor, and that positional information can still be detected without affecting measurement accuracy.

[0075] In another embodiment, the arrangement of the sensor reading head and magnetic grid further includes the arrangement shown in Figure 7. Refer to Figure 7. The sensor reading head is located in a groove on the bottom surface of the support plate, and the magnetic grid is positioned on the inner wall of the sleeve beneath the magnetic steel. This also does not occupy the stroke of the secondary components. Furthermore, in the aforementioned arrangement, those skilled in the art may perform corresponding verifications regarding the stress and deformation of the hollow core shaft 6 based on actual application scenarios. This application is not further limited herein.

[0076] As shown in Figure 8, the present application further provides an electromagnetic shock absorber 1 including a linear motor 19. In one embodiment, Figure 1 is an overall cross-sectional view of an electromagnetic shock absorber according to one embodiment of the present application. As shown in Figure 1, the electromagnetic shock absorber 1 includes an upper mount 17, a spring 18, and a linear motor 19. The upper mount 17 is fixed to the vehicle body by bolts, and the linear motor 19 is fixed to the upper mount 17 by nuts (not shown). The bottom surface of the linear motor 19 is connected to a wishbone (not shown) by interference fit or welding, and further connected to the wheels of the vehicle.

[0077] As shown in Figures 9A and 9B, the present application further provides a vehicle 900 including an electromagnetic shock absorber 1 or a linear motor 19.

[0078] Compared to related technologies, this application has the following beneficial effects.

[0079] 1. The primary components provided in this application include a core unit. The core unit is a solid block rather than a laminated structure, which simplifies the process.

[0080] 2. The primary components in this application are assembled from core units. The number of core units corresponds to the length of the hollow core shaft and offers high flexibility. The length of the hollow core shaft and the number of core units may be configured according to actual requirements.

[0081] 3. The magnetic grid sensor used in this application may be arranged within a hollow core shaft without occupying the stroke of the secondary components, and can accurately measure the absolute position of the motor in motion. The annular magnetic grid design ensures position measurement even when the primary and secondary components of the linear motor rotate relative to each other.

[0082] 4. In this application, the current direction of the winding can be flexibly controlled by changing the winding method.

[0083] 5. According to this application, the water inlet pipe and displacement sensor are integrated into the same hollow core shaft, resulting in a compact structure.

[0084] Although this application is described using the embodiments described above, it should be understood that these embodiments are for illustrative and explanatory purposes only and do not limit this application to the scope of the embodiments described. In addition, those skilled in the art will understand that this application is not limited to the embodiments described above, and that further modifications and alterations may be made in accordance with the teachings of this application, and that all such modifications and alterations fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A primary iron core (60) has a hollow cavity (310) provided within it, A partition (12) comprising a cylindrical body (121) is provided, comprising a first chamber (311) which is at least partially disposed within the hollow cavity and sealed at one end, wherein an annular cavity (120) is provided between the cylindrical body and the inner wall of the primary iron core, and the annular cavity is located within the first chamber. The outlet end of the water inlet pipe is positioned within the annular cavity, and the water inlet pipe (13) A primary component (300) comprising the above.

2. The primary component according to claim 1, wherein a water inlet (321) and a water outlet (322) are located at one end of the primary core away from the annular cavity, the water inlet being used to allow an external cooling medium to enter the primary core or to allow the water inlet pipe to pass through, and the water outlet being used to discharge the cooling medium to the outside of the primary core.

3. The water inlet pipe is constructed as a hollow annular pipe, and the inner cylinder (131) and outer cylinder (132) of the annular pipe surround each other to form the water inlet pipe. The primary component according to claim 2, wherein a gap (130) is provided between the outer cylinder of the annular pipe and the inner wall of the primary core, the gap communicates with the water outlet, a through hole (320) is provided in the annular pipe, the through hole communicates with the gap, and the through hole is located within the annular cavity.

4. The primary component according to claim 2 or 3, wherein the water inlet pipe is constructed as the hollow annular pipe, a gap is provided between the inner cylinder of the annular pipe and the cylindrical body of the partition, the gap communicates with the water outlet, a through hole is provided in the annular pipe, the through hole communicates with the gap, and the through hole is located within the annular cavity.

5. The primary component according to any one of claims 2 to 4, wherein the axis of the water outlet coincides with the axis of the hollow cavity.

6. The primary component according to any one of claims 2 to 5, wherein the partition further comprises an annular bottom plate (122), and the annular bottom plate connects the inner wall of the primary core to one end of the cylindrical body away from the water outlet.

7. The primary component according to claim 6, wherein the distance between one end of the water inlet pipe away from the water inlet and the surface of the annular bottom plate facing the water inlet is less than 5 mm.

8. The primary component according to claim 6 or 7, wherein one end of the water inlet pipe, away from the water inlet, abuts against the surface of the annular bottom plate facing the water inlet, the surface of the annular bottom plate facing the water inlet closes the one end of the water inlet pipe away from the water inlet, a through hole is provided in the side wall of the water inlet pipe, and the through hole communicates with the water outlet.

9. The primary component according to claim 8, wherein the distance between the center of the through hole and the surface of the annular bottom plate facing the water inlet is less than 5 mm.

10. The primary component according to any one of claims 6 to 9, wherein the cylindrical body comprises a cylindrical plate and the annular bottom plate comprises a circular ring bottom plate.

11. The primary component according to claim 10, wherein the cylindrical body further comprises a circular upper plate (123), and the circular upper plate is connected to one end of the cylindrical body adjacent to the water outlet, thereby closing one end of the cylindrical body.

12. The primary component according to any one of claims 6 to 11, wherein the one end of the water inlet pipe away from the water inlet is an inclined end surface, and the inclined end surface partially abuts the surface of the annular bottom plate facing the water inlet.

13. The primary component according to any one of claims 2 to 12, wherein the water inlet pipe comprises at least two branch water inlet pipes (133), and the at least two branch water inlet pipes are spaced apart in the circumferential direction of the annular cavity.

14. The primary component according to any one of claims 1 to 13, wherein the primary iron core comprises a core body (61) and a hollow core shaft (6), the hollow core shaft is arranged in a sleeve shape within the core body, and the central hole of the hollow core shaft is configured as the hollow cavity.

15. The core body further comprises a plurality of windings (14) arranged continuously in the axial direction, The water outlet is located at one end of the primary iron core, away from the annular cavity. The partition comprises the annular bottom plate, and the annular bottom plate is connected to one end of the primary iron core that is away from the water outlet. The primary component according to claim 14, wherein the outlet end of the water inlet pipe is positioned close to the annular bottom plate, and the outlet end of the water inlet pipe communicates with the water outlet through the first chamber.

16. A linear motor (19) comprising the primary component according to any one of claims 1 to 15.

17. The linear motor according to claim 16, further comprising a secondary component (30) arranged in a sleeve shape on the outside of the primary component.

18. The linear motor according to claim 17, further comprising: a sleeve (3) and a plurality of magnetic steels (4) arranged on the inner wall of the sleeve; a cylindrical primary core; and a sleeve arranged in a sleeve-like manner within the primary core.

19. The linear motor according to claim 18, further comprising a guide bar (7) fixed to the sleeve and movably inserted into the cylindrical body.

20. The linear motor according to claim 19, wherein the guide bar, the cylindrical body, and the hollow cavity are coaxial.

21. An electromagnetic shock absorber (1) comprising a linear motor according to any one of claims 16 to 20.

22. A vehicle (900) comprising a linear motor according to any one of claims 16 to 20 or an electromagnetic shock absorber according to claim 21.

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