A primary assembly, linear motor, electromagnetic damper and vehicle

Abstract

The application provides a primary assembly, a linear motor, an electromagnetic damper and a vehicle, and the primary assembly comprises a primary core, the primary core is provided with a hollow cavity; a partition plate is at least partially arranged in the hollow cavity to form a first chamber with one end being blocked, the partition plate comprises a barrel, an annular cavity is arranged between the barrel and the inner wall of the primary core, and the annular cavity is located in the first chamber; and a water inlet pipeline is arranged in the annular cavity and has a water outlet end. The primary assembly provided by the application reduces the weight of the linear motor, improves the force density of the linear motor, and strengthens the cooling effect of the linear motor by arranging the hollow cavity and the water inlet pipeline in the primary core.

Description

Technical Field

[0001] This application relates to the field of linear motor technology, and more specifically to a primary component, a linear motor, an electromagnetic damper, and a vehicle. Background Technology

[0002] Electromagnetic dampers are widely used in the suspension of new intelligent vehicles. They utilize electromagnetic induction to control a linear motor, generating a damping force in the opposite direction based on road conditions and driving conditions, thereby suppressing vehicle vibration and maintaining vehicle stability. Electromagnetic dampers have a response speed of up to 1000Hz, five times faster than traditional dampers, resolving the conflict between comfort and sportiness.

[0003] In related technologies, the primary core of a linear motor is formed by stacking multiple layers of core laminations along the axial direction, which is complex in forming process, has low processing efficiency and high cost. At the same time, the sealing structure of the linear motor occupies the axial space of the primary core, resulting in a larger volume of the linear motor. Moreover, the cooling structure of the linear motor increases the space occupied by the linear motor or the cooling structure is complex and difficult to implement.

[0004] Therefore, it is necessary to provide a new primary component, linear motor, electromagnetic damper, and vehicle to at least partially solve the above problems. Summary of the Invention

[0005] This application is made to address at least one of the aforementioned problems. This application provides a primary assembly, comprising: a primary iron core having a hollow cavity; a partition 12, the partition being at least partially disposed within the hollow cavity to form a first chamber sealed at one end, the partition including a cylindrical body, an annular cavity being provided between the cylindrical body and the inner wall of the primary iron core, the annular cavity being located within the first chamber; and a water inlet pipe, the outlet end of the water inlet pipe being disposed within the annular cavity.

[0006] For example, the primary iron core is provided with an inlet and an outlet at one end away from the annular cavity. The inlet is used to allow external cooling medium to enter the iron core or to allow the inlet pipe to pass through. The outlet is used to discharge the cooling medium to the outside of the iron core.

[0007] For example, the water inlet pipe is constructed as a hollow annular pipe, with the inner and outer cylinders of the annular pipe forming 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 the gap communicates with the water outlet. The annular pipe is provided with a through hole, which communicates with the gap and is located within the annular cavity.

[0008] For example, the water inlet pipe is constructed as a hollow annular pipe, and a gap is provided between the inner cylinder of the annular pipe and the cylinder of the partition, and the gap is connected to the water outlet; wherein, a through hole is provided on the annular pipe, the through hole is connected to the gap, and the through hole is located inside the annular cavity.

[0009] For example, the axis of the water outlet coincides with the axis of the hollow cavity.

[0010] For example, the partition also includes an annular bottom plate that connects the end of the cylinder away from the outlet to the inner wall of the primary iron core.

[0011] For example, the distance between the end of the water inlet pipe away from the water inlet and the side of the annular base plate facing the water inlet is less than 5 mm.

[0012] For example, one end of the water inlet pipe away from the water inlet abuts against the side of the annular base plate facing the water inlet, the side of the annular base plate facing the water inlet blocks the end of the water inlet pipe away from the water inlet, and the side wall of the water inlet pipe is provided with a through hole, the through hole communicating with the water outlet.

[0013] For example, the distance from the center of the through hole to the side of the annular base plate facing the water inlet is less than 5 mm.

[0014] For example, the cylinder body includes a cylindrical plate, and the annular bottom plate includes a circular annular bottom plate.

[0015] For example, the cylinder further includes a circular top plate, which is connected to one end of the cylinder near the outlet to seal one end of the cylinder.

[0016] For example, the end of the water inlet pipe away from the water inlet is a beveled end face, which abuts against the side of the annular base plate facing the water inlet.

[0017] For example, the water inlet pipe includes at least two branch water inlet pipes, which are arranged circumferentially along the annular cavity.

[0018] For example, the primary iron core includes a core body and a hollow mandrel, the hollow mandrel being sleeved inside the core body, and the central hole of the hollow mandrel being configured as the hollow cavity.

[0019] For example, it further includes: a plurality of windings arranged sequentially on the core along the axial direction; a water outlet is provided at one end of the primary iron core away from the annular cavity; the partition includes an annular base plate, which is connected to the end of the primary iron core away from the water outlet; the water outlet of the water inlet pipe is located near the annular base plate, and the water outlet of the water inlet pipe is connected to the water outlet through the first chamber.

[0020] This application also provides a linear motor, which includes the primary components described above.

[0021] For example, the linear motor further includes a secondary component, which is sleeved outside the primary component.

[0022] For example, the linear motor further includes: the secondary component includes a sleeve and a plurality of magnets disposed on the inner sidewall of the sleeve, the primary iron core is cylindrical, and the sleeve is sleeved on the primary iron core.

[0023] For example, the linear motor further includes a guide rod, which is fixedly connected to the sleeve and movably inserted into the sleeve body.

[0024] For example, the guide rod, the cylinder, and the hollow cavity are coaxial.

[0025] This application also provides an electromagnetic vibration damper, characterized in that it includes the linear motor described above.

[0026] This application also provides a vehicle, characterized in that it includes the above-described linear motor or the above-described electromagnetic damper.

[0027] This application reduces the weight of the linear motor, increases its force density, and enhances its cooling effect by incorporating a cavity and cooling components in the primary mandrel. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 An overall cross-sectional view of an electromagnetic vibration damper according to an embodiment of this application is shown;

[0030] Figure 2 A cross-sectional view of a linear motor according to an embodiment of this application is shown;

[0031] Figure 3A A structural cross-sectional view of a primary component according to an embodiment of this application is shown;

[0032] Figure 3B A structural cross-sectional view of a primary component according to an embodiment of this application is shown;

[0033] Figure 3C A structural cross-sectional view of a primary component according to an embodiment of this application is shown;

[0034] Figure 3D A structural cross-sectional view of a primary component according to an embodiment of this application is shown;

[0035] Figure 4 A schematic diagram of the windings of a linear motor according to an embodiment of this application is shown;

[0036] Figure 5 A schematic diagram of a primary unit according to an embodiment of this application is shown;

[0037] Figure 6 A schematic diagram of the connection and lead wires of a linear motor according to an embodiment of this application is shown;

[0038] Figure 7 A schematic diagram of a sensor for an electromagnetic vibration damper according to an embodiment of this application is shown;

[0039] In the attached diagram:

[0040] Electromagnetic vibration damper 1, upper tower top 17, spring 18, linear motor 19, three-phase lead wire 2, sleeve 3, magnet 4, core unit 5, hollow mandrel 6, guide rod 7, magnetic grid 8, sensor read head 9, first buffer 10, second buffer 11, partition 12, water inlet pipe 13, winding 14, first wire 15, second wire 15, first wire through hole 511, second wire through hole 511, first slot 512 Second slot 512, first positioning component 513, second positioning component 513, primary component 300, hollow cavity 310, first chamber 311, second chamber 312, annular cavity 120, cylinder 121, annular bottom plate 122, circular top plate 123, gap 130, inner cylinder 131, outer cylinder 132, branch water inlet pipe 133, through hole 320, water inlet 321, water outlet 322, core 61. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application more apparent, exemplary embodiments according to this application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. Based on the embodiments of this application described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of this application.

[0042] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0043] It should be understood that this application can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this application to those skilled in the art.

[0044] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0045] To fully understand this application, a detailed structure will be presented in the following description to illustrate the technical solution proposed in 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 methods.

[0046] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0047] In one embodiment, such as Figure 2 , Figures 3A to 3D and Figure 5 As shown, the primary component 300 provided in this application includes: a primary iron core, wherein the primary iron core is provided with a hollow cavity 310.

[0048] In one embodiment, the primary core includes a core body 61 and a hollow mandrel 6, the hollow mandrel 6 being sleeved inside the core body 61, and the central hole of the hollow mandrel 6 being configured as a hollow cavity 310.

[0049] Furthermore, the primary component 300 also includes a partition 12, which is at least partially disposed within the hollow cavity 310 to form a first chamber 311 sealed at one end. The partition 12 includes a cylinder 121, and an annular cavity 120 is provided between the cylinder 121 and the inner wall of the primary core. The annular cavity 120 is located in the first chamber 311.

[0050] Furthermore, the primary component 300 also includes a water inlet pipe 13, the outlet of which is located within the annular cavity 120. The water inlet pipe 13 is used to provide a cooling medium, and the primary component 300 can be cooled by providing the water inlet pipe.

[0051] The water inlet pipe 13 can be implemented in the following manner, as in one embodiment, such as Figure 3D As shown, the water inlet pipe 13 includes at least two branch water inlet pipes 133, which are spaced apart circumferentially along the annular cavity 120. In another embodiment, as... Figure 3B and Figure 3C As shown, the water inlet pipe 13 is constructed as a hollow annular pipe, with the inner cylinder 131 and outer cylinder 132 of the annular pipe forming the water inlet pipe 13. Figure 3C As shown, a gap 130 is provided between the outer cylinder 132 of the annular pipe and the inner wall of the primary iron core, and the gap 130 communicates with the outlet 322; wherein, a through hole 320 is provided on the annular pipe, and the through hole 320 communicates with the gap 130, and the gap 130 communicates with the outlet 322 through the through hole 320, and the through hole 320 is located within the annular cavity 120. In other embodiments, such as Figure 3B As shown, the inlet pipe 13 is a hollow annular pipe. A gap 130 is provided between the inner cylinder 131 of the annular pipe and the cylinder of the partition 12, and this gap 130 communicates with the outlet 322. A through hole 320 is provided on the annular pipe, communicating with the gap 130, and located within the annular cavity 120. It is worth noting that the through hole can be located on the inner pipe, the outer pipe, or both the inner and outer pipes.

[0052] In some embodiments, the end of the water inlet pipe 13 away from the water inlet 321 is a beveled end face, which abuts against the side of the annular base plate 122 facing the water inlet 321. A through hole can be provided on the water inlet pipe 13, which communicates with the annular cavity.

[0053] In one embodiment, such as Figures 3A to 3DAs shown, the primary iron core has an inlet 321 and an outlet 322 at the end away from the annular cavity 120. The inlet 321 is used to allow external cooling medium to enter the primary iron core or to allow the water inlet pipe 13 to pass through. The outlet 322 is used to discharge the cooling medium to the outside of the primary iron core. Exemplarily, the axis of the outlet 322 coincides with the axis of the hollow cavity 310.

[0054] In one embodiment, such as Figures 3A to 3D The partition 12 also includes an annular bottom plate 122, which connects the end of the cylinder 121 away from the outlet 322 to the inner wall of the primary iron core. The cylinder 121 includes a cylindrical plate, and the annular bottom plate 122 includes a circular annular bottom plate. For example, as... Figure 3D As shown, the distance between the end of the water inlet pipe 13 away from the water inlet 321 and the side of the annular base plate 122 facing the water inlet 321 is d3, and the distance d3 is less than 5mm.

[0055] In one embodiment, such as Figure 3B and Figure 3C As shown, the end of the inlet pipe 13 away from the inlet 321 abuts against the side of the annular base plate 122 facing the inlet 321. The side of the annular base plate 122 facing the inlet 321 blocks the end of the inlet pipe 13 away from the inlet 321. The side wall of the inlet pipe 13 is provided with a through hole 320, which communicates with the outlet 322. That is, the through hole and the annular cavity are connected to the space outside the inlet pipe, and thus communicate with the outlet. For example, as shown in 3B, the distances d1 and d2 between the center of the through hole 320 and the side of the annular base plate 122 facing the inlet 321 are less than 5 mm. Figure 3C As shown, the distance d2 from the center of the through hole 320 to the side of the annular base plate 122 facing the inlet 321 is less than 5mm.

[0056] In one embodiment, the cylinder 121 further includes a circular top plate 123, which is connected to one end of the cylinder 121 near the outlet 322 to seal one end of the cylinder 121.

[0057] In one embodiment, such as Figure 3A and Figure 3BAs shown, the hollow cavity inside the primary iron core is divided into a first chamber 311 and a second chamber 312 by a partition 12, and the water inlet pipe 13 is connected to the vehicle cooling system. The coolant enters from the middle water inlet 321, cools the linear motor and then flows out from the water outlet pipes on both sides, enhancing the heat dissipation capacity of the linear motor; since a position reserved for the sensor is provided inside the primary iron core, it is necessary to design the partition 12 to seal the primary iron core to prevent leakage from the upper water inlet pipe 13 to the lower part; the structure of the partition 12 is in the shape of "ji", and the empty part around the perimeter will form a dead zone after the linear motor is filled with water. Compared with the "one" - shaped sealing structure, it still has advantages in the heat dissipation of the linear motor; the distance between the water inlet 321 and the top surface of the partition 12 should be at least 10 mm to ensure the water inlet efficiency.

[0058] In one embodiment, as Figure 3A and Figure 3B shown, the axis of one of the water inlet 321 and the water outlet 322 coincides with the axis of the primary iron core. The middle of the linear motor water inlet pipe 13 is the water inlet 321, and the water outlets 322 are located on both sides of the water inlet 321; as Figure 3B When space permits, the pipes on both sides can be set as water inlets 321, and the middle one can be set as the water outlet 322. At this time, there is no dead zone in the entire water inlet pipe 13, and the effect is the best; to ensure the efficiency of the water inlet pipe 13, a water pump is generally installed in the water outlet pipe to quickly pump the water into the vehicle cooling system for circulation; the cooling structure 13 of the linear motor has one water inlet 321 and two water outlets 322; the arrangement of the water inlet 321 and the water outlets 322 is preferably such that the axis of one of them coincides with the axis of the primary iron core to make the water cooling effect of the linear motor more uniform.

[0059] In one embodiment, when space is limited, the water inlet pipe 13 of the linear motor can be set to have only one water inlet 321 and one water outlet 322. The arrangement is preferably such that the axis of one of the water inlet 321 or the water outlet 322 coincides with the axis of the primary iron core. If this arrangement cannot be guaranteed, it is preferably that the water inlet 321 and the water outlet 322 are symmetrically placed.

[0060] In one embodiment, the cooperation between the primary iron core and the water inlet pipe 13 can be integrally formed by 3D printing or connected by threads.

[0061] In one embodiment, the cooperation between the primary iron core and the partition 12 can be integrally formed by 3D printing or connected by threads.

[0062] For example, the primary component 300 also includes a plurality of windings 14, which are arranged sequentially along the axial direction on the core 61. The primary iron core has a water outlet 322 at one end away from the annular cavity 120. The partition 12 includes an annular base plate 122, which is connected to the end of the primary iron core away from the water outlet 322. The water outlet of the water inlet pipe 13 is located close to the annular base plate 122. The water outlet of the water inlet pipe 13 is connected to the water outlet 322 through the first chamber 311, so that the cooling medium comes into contact with the primary iron core within the length of the winding, and the cooling medium exchanges heat with the primary iron core and the winding, thereby enabling better cooling of the winding.

[0063] In one embodiment, the core 61 includes multiple core units 5 stacked and connected axially along the hollow mandrel 6. Each core unit 5 is an annular structure and is respectively fitted onto the outer circumferential surface of the hollow mandrel 6. The core units 5 are assembled onto the hollow mandrel 6 by interference fit, and annular receiving grooves are provided between adjacent core units 5. The primary assembly includes multiple windings 14 disposed in the receiving grooves. Each winding 14 is disposed around the circumference of the core unit 5 in a receiving groove. For example, the windings 14 are disc windings wound with flat wire, and the multiple windings 14 are electrically connected to each other. In one embodiment, while ensuring motor performance, a heat pipe (not shown) can be inserted by opening holes at appropriate positions in the core units. The heat pipe extends upward through the uppermost core unit and connects to the vehicle's external cooling system to further enhance the heat dissipation capacity of the linear motor.

[0064] In one embodiment, such as Figure 5 As shown, the core unit 5 includes an annular primary yoke and a primary tooth. The primary tooth extends outward along the radial direction of the primary yoke, and the thickness of the primary yoke along the axial direction is greater than the thickness of the primary tooth.

[0065] Continue to refer to Figure 5 The end faces of the primary yokes of adjacent core units 5 are respectively provided with a first positioning member 513 and a second positioning member 513, wherein the first positioning member 513 and the second positioning member 513 cooperate with each other, wherein one of the first positioning member 513 and the second positioning member 513 is a protrusion and the other is a groove. For example, in order to ensure the accuracy of the assembly of the core unit 5 and the hollow mandrel 6, the first positioning member 513 and the second positioning member 513 provided on the primary yoke are used for circumferential positioning. The shape of the first positioning member 513 and the second positioning member 513 includes, but is not limited to, rectangular protrusions and grooves or circular protrusions and grooves.

[0066] Continue to refer to Figure 5The core unit 5 has a first slot 512 on its first surface and a second slot 512 on its second surface facing away from the first surface. The first slot 512 and the second slot 512 of adjacent core units 5 form a receiving groove, which is used to receive the winding 14.

[0067] Continue to refer to Figure 5 The core unit 5 is provided with a first limiting member, and the hollow spindle 6 is provided with a second limiting member. The first limiting member and the second limiting member cooperate with each other. For example, one of the first limiting member and the second limiting member is a protrusion and the other is a groove. The first limiting member and the second limiting member are used to fix the relative position of the core unit 5 along the axial direction in the hollow spindle 6, so as to prevent the core unit 5 and the hollow spindle 6 from rotating relative to each other, which is beneficial for the linear motor to generate greater force.

[0068] In one embodiment, in addition to forming a primary iron core by fitting the core units onto a hollow mandrel, the core units are connected to each other to form a primary iron core by means of adhesive or welding.

[0069] In one embodiment, the hollow mandrel includes a support disk and a central shaft, the central shaft having a first end and a second end opposite to the first end, the central shaft having an axially extending cavity, the support disk being disposed at the second end of the central shaft and extending radially outward from the central shaft.

[0070] For example, the hollow mandrel 6 has a T-shaped cross-section, and a support plate is provided at the second end of the hollow mandrel 6. This support plate can prevent the core unit 5 from falling during the linear motor's movement. 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 mandrel and the support plate can be integrally formed by 3D printing or by threaded connection.

[0071] In summary, the core provided in this application is composed of multiple core units. Compared with the primary iron core made of stacked silicon steel sheets provided in related technologies, the primary iron core and core units provided in this application have simpler processing technology, easier installation, reduced processing costs, and improved component integration.

[0072] In one embodiment, Figure 4A schematic diagram of the electrical connection between windings 14 according to an embodiment of this application is shown. Further, each core unit is provided with a first wire passage 511 and a second wire passage 511. Each winding 14 includes a first lead-out end located on the inner ring of the winding 14 and a second lead-out end located on the outer ring of the winding 14. A first wire 15 passes through the first wire passage 511 and electrically connects the first lead-out ends of the two windings 14 located at both ends of the first wire passage 511. A second wire 15 passes through the second wire passage 511 and electrically connects the second lead-out ends of the two windings located at both ends of the second wire passage 511. For example, the first wire passage 511 and the second wire passage 511 penetrate the core unit along the axial direction. The first wire 15 connects different windings in series via the first wire passage 511, and the second wire 15 connects different windings in series via the second wire passage 511.

[0073] In one embodiment, winding 14 includes a first winding and a second winding. The first winding includes a first winding wire, and the second winding includes a second winding wire. The winding direction of the first winding wire along the circumferential direction is opposite to that of the second winding wire along the circumferential direction. For example, adjacent windings 14 may be configured such that the winding direction of the first winding wire along the circumferential direction is clockwise and the winding direction of the second winding wire along the circumferential direction is counterclockwise, or vice versa, depending on the requirements of the application scenario. Through the arrangement of the first and second winding wires, the current flow direction in winding 14 can be controlled.

[0074] In one embodiment, winding 14 includes a three-phase winding, which is connected in a star configuration. For example... Figure 2 As shown, the linear motor includes three-phase lead wires 2. After the three-phase lead wires 2 converge on the top surface of the linear motor, they pass upward through the top of the upper tower 17 and are led out to the outside. Figure 6 A schematic diagram of the three-phase wire connection and end face leads of a linear motor according to an embodiment of this application is shown. Figure 6 As shown, the three-phase wires of the linear motor are connected using a star-point connection. (As...) Figure 6 As shown, the windings of the linear motor form a star connection at the primary tooth at the bottom of the core unit. After passing through the primary tooth of the uppermost core unit in the primary iron core, they are directly led out to the outside. The three-phase leads are fixed on the top surface of the top primary tooth by injection molding. At the same time, the conductive lines of the sensor and the conductive lines of the temperature sensor are also fixed on the top surface in the same way after being led out.

[0075] This application also provides a linear motor, including the aforementioned primary components. In one embodiment, Figure 2 A cross-sectional view of a linear motor according to an embodiment of this application is shown. Figure 2As shown, the linear motor also includes a secondary assembly, which is sleeved outside the primary assembly. Exemplarily, the secondary assembly includes a sleeve 3 and a plurality of magnets 4 disposed on the inner wall of the sleeve 3. The primary core is cylindrical, and the sleeve is sleeved around the primary core. The secondary assembly is configured to move relative to the primary assembly along the axial direction of the primary assembly. For example, the sleeve 3 is cylindrical; for example, the magnets 4 can be fixed to the inner wall of the sleeve 3 by adhesive.

[0076] In one embodiment, the secondary component further includes a guide rod 7, which is fixedly connected to the sleeve 3 and movably inserted into the cylinder 121. For example, as... Figure 2 As shown, a guide rod 7 is provided on the inner surface of the sleeve 3, which is perpendicular to the axial direction. The guide rod 7 is movably inserted into the cylinder 121. Exemplarily, the guide rod 7, the cylinder 121, and the hollow cavity 310 are coaxial.

[0077] In one embodiment, the inner surface of the sleeve 3, perpendicular to the axial direction, is provided with a first buffer 10 corresponding to the support plate of the hollow mandrel. In another embodiment, a support plate is also provided at the second end of the hollow mandrel, and a second buffer 11 is provided below the magnet 4, with a portion of the surface of the second buffer 11 facing the support plate. When the secondary component moves downward, the first surface of the support plate contacts the second buffer 11 installed below the magnet 4 to limit its movement and prevent the primary component from separating from the secondary component; when the secondary component moves upward, the first buffer 10 contacts the second surface of the support plate of the hollow mandrel 6 to limit its movement.

[0078] In one embodiment, the material of the primary component includes a soft magnetic material. Depending on the needs of the linear motor application scenario, the outer diameter of the sleeve 3 is no greater than 150mm (for example, 145mm, 140mm, 135mm, 130mm, etc.), and the diameter of the core unit 5 is no greater than 115mm (for example, 110mm, 105mm, 100mm, 95mm, etc.). For example, the motor provided in this application can provide a force of up to 7kN in a short time.

[0079] In one embodiment, such as Figure 1 , Figure 2 As shown, the linear motor also includes a displacement sensor for measuring the displacement vectors of the primary and secondary components. The displacement sensor includes a magnetic grating sensor, which comprises a sensor read head 9 and a magnetic grating 8. The sensor read head 9 is disposed within the cavity of the hollow spindle 6, and a magnetic grating 8 corresponding to the sensor read head 9 is disposed on the guide rod 7. For example, the corresponding sensor read head 9 and magnetic grating 8 are spaced apart by a predetermined distance, wherein the predetermined distance is less than 5 mm to ensure the measurement accuracy of the sensor.

[0080] In one embodiment, the hollow mandrel 6 is preferably made of a magnetically conductive material, which can serve as an additional part of the primary iron core to improve the performance of the linear motor. Simultaneously, it can guide the magnetic field leaking from the core unit 5 through the hollow mandrel 6, protecting the sensor read head 9 inside the shaft from interference. Provided that mechanical properties such as stiffness and hardness are satisfied, the selection of materials for the hollow mandrel includes, but is not limited to, structural steel, mold steel, etc. The hollow form of the hollow mandrel 6 reduces material usage, lowers weight and cost, and allows the guide rod 7, on which the magnetic grating 8 is installed, to slide within the cavity of the hollow mandrel 6. Figure 2 As shown, the sensor is arranged inside the linear motor, and the sensor reading head 9 is located inside the hollow core 6 instead of the bottom surface of the primary iron core, so as not to occupy the stroke of the secondary components of the linear motor; the guide rod 7 with magnetic grid 8 is installed, and the guide rod 7, the cylinder 121 and the hollow cavity 310 are coaxial; the material of the guide rod 7 and the housing of the sensor reading head 9 is preferably a magnetic shielding material to avoid conducting the magnetic field leaking from the inside of the linear motor to the vicinity of the sensor and affecting the measurement.

[0081] In one embodiment, the magnetic grating 8 includes a first magnetic grating and a second magnetic grating. The first magnetic grating includes a plurality of first magnets arranged along the axial direction, and the second magnetic grating includes a plurality of second magnets arranged along the axial direction. The first and second magnetic gratings have the same length along the axial direction, and the first and second magnets have different pole lengths. In one embodiment, to measure the absolute position of the linear motor's motion, the sensor's magnetic grating uses the first and second magnetic gratings for calculation (because the magnetic fields generated by the first and second magnets of different lengths are different, the asymmetrical design of the first and second magnets and the cooperation between the first and second magnetic gratings can determine that the first and second magnets are on the corresponding magnetic gratings).

[0082] In one embodiment, the first magnetic grating and the second magnetic grating are symmetrically arranged on the guide rod, corresponding to the sensor reading head.

[0083] In one embodiment, the magnetic grating is a fan-shaped ring structure to ensure that if the magnetic grating and the reading head rotate relative to each other during the operation of the linear motor, the positional distance remains unchanged, the positional information can still be detected, and the measurement accuracy is not affected.

[0084] In other embodiments, the arrangement of the sensor read head and the magnetic grating also includes, for example... Figure 7 The layout shown is for reference. Figure 7The sensor reading head is located in the groove on the bottom surface of the support plate, and the magnetic grating is set on the inner wall of the sleeve below the magnet, which also does not occupy the stroke of the secondary component; furthermore, in the above arrangement, those skilled in the art can check the stress deformation of the hollow mandrel 6 according to the actual application scenario, and this application does not make any further limitations.

[0085] This application also provides an electromagnetic vibration damper, including the linear motor described above. In one embodiment, Figure 1 An overall cross-sectional view of an electromagnetic vibration damper according to an embodiment of this application is shown. Figure 1 As shown, the electromagnetic damper 1 includes an upper tower 17, a spring 18, and a linear motor 19. The upper tower 17 is fixed to the vehicle body by bolts, and the linear motor 19 is fixed to the upper tower 17 by nuts (not shown). The bottom surface of the linear motor 19 is connected to the fork arm (not shown) by interference fit or welding, and then connected to the vehicle wheel.

[0086] This application also provides a vehicle including the aforementioned electromagnetic damper.

[0087] Compared with related technologies, this application has the following advantages:

[0088] 1. The primary component provided in this application is composed of core units, which are block-shaped wholes rather than stacked sheets, and the process is simple.

[0089] 2. The primary component of this application is assembled from core units. The number of core units corresponds to the length of the hollow mandrel, which is highly flexible and can be configured according to actual needs, including the length of the hollow mandrel and the number of core units.

[0090] 3. The magnetic grating sensor used in this application can be arranged inside the hollow mandrel without occupying the travel of the secondary components, and accurately measure the absolute position of the motor movement; the design of the annular magnetic grating strip ensures that the position measurement can be achieved even when the primary and secondary components of the linear motor rotate relative to each other.

[0091] 4. In this application, the direction of current flow in the winding can be flexibly controlled by changing the winding method.

[0092] 5. This application integrates the water inlet pipe and the position sensor into the same hollow mandrel, resulting in a compact structure.

[0093] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the scope of the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which 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 component of a linear motor, characterized in that, include: Primary iron core, wherein the primary iron core is provided with a hollow cavity; A partition, at least partially disposed within the hollow cavity to form a first chamber sealed at one end, the partition comprising a cylindrical body, an annular cavity being provided between the cylindrical body and the inner wall of the primary iron core, the annular cavity being located within the first chamber; A water inlet pipe, wherein the outlet end of the water inlet pipe is located within the annular cavity; The primary iron core has an inlet and an outlet at the end away from the annular cavity. The inlet is used to allow external cooling medium to enter the iron core or to allow the water inlet pipe to pass through. The outlet is used to discharge the cooling medium to the outside of the iron core. The partition plate further includes an annular bottom plate, which connects the end of the cylinder away from the outlet to the inner wall of the primary iron core. The cylindrical body includes a cylindrical plate, and the annular bottom plate includes a circular annular bottom plate; The cylinder also includes a circular top plate, which is connected to one end of the cylinder near the outlet to seal one end of the cylinder. The primary iron core includes a core body and a hollow mandrel, the hollow mandrel being sleeved within the core body, and the central hole of the hollow mandrel being configured as the hollow cavity; The primary component also includes multiple windings, which are sequentially arranged on the core along the axial direction; The hollow cavity is divided into a first chamber and a second chamber by the partition, and the second chamber is used for the guide rod of the secondary component to slide within it.

2. The primary component according to claim 1, characterized in that, The water inlet pipe is constructed as a hollow annular pipe, with the inner and outer cylinders of the annular pipe forming 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 the gap is connected to the water outlet; wherein, a through hole is provided on the annular pipe, the through hole is connected to the gap, and the through hole is located inside the annular cavity.

3. The primary component according to claim 1, characterized in that, The water inlet pipe is a hollow annular pipe with a gap between the inner cylinder of the annular pipe and the cylinder of the partition, and the gap is connected to the water outlet; wherein, the annular pipe is provided with a through hole, the through hole is connected to the gap, and the through hole is located inside the annular cavity.

4. The primary component according to claim 1, characterized in that, The axis of the water outlet coincides with the axis of the hollow cavity.

5. The primary component according to claim 1, characterized in that, The distance between the end of the water inlet pipe furthest from the water inlet and the side of the annular base plate facing the water inlet is less than 5 mm.

6. The primary component according to claim 1, characterized in that, The end of the water inlet pipe away from the water inlet abuts against the side of the annular base plate facing the water inlet. The side of the annular base plate facing the water inlet blocks the end of the water inlet pipe away from the water inlet. The side wall of the water inlet pipe is provided with a through hole, which communicates with the water outlet.

7. The primary component according to claim 6, characterized in that, The distance from the center of the through hole to the side of the annular base plate facing the water inlet is less than 5 mm.

8. The primary component according to claim 1, characterized in that, The end of the water inlet pipe away from the water inlet is a beveled end face, which abuts against the side of the annular base plate facing the water inlet.

9. The primary component according to claim 1, characterized in that, The water inlet pipe includes at least two branch water inlet pipes, which are spaced apart circumferentially along the annular cavity.

10. The primary component according to claim 1, characterized in that, The primary iron core is provided with a water outlet at the end away from the annular cavity; The partition includes an annular base plate, which is connected to the end of the primary iron core away from the outlet. The outlet end of the water inlet pipe is located close to the annular base plate, and the outlet end of the water inlet pipe is connected to the water outlet through the first chamber.

11. A linear motor, characterized in that, Includes the primary component as described in any one of claims 1 to 10.

12. The linear motor as described in claim 11, characterized in that, Also includes: The secondary component is disposed outside the primary component.

13. The linear motor as described in claim 12, characterized in that, Also includes: The secondary component includes a sleeve and a plurality of magnets disposed on the inner sidewall of the sleeve. The primary iron core is cylindrical, and the sleeve is fitted onto the primary iron core.

14. The linear motor as described in claim 13, characterized in that, It also includes a guide rod, which is fixedly connected to the sleeve and movably inserted into the cylinder body.

15. The linear motor as described in claim 14, characterized in that, The guide rod, the cylinder, and the hollow cavity are coaxial.

16. An electromagnetic vibration damper, characterized in that, Includes the linear motor as described in any one of claims 11 to 15.

17. A vehicle, characterized in that, Includes the linear motor as described in any one of claims 11 to 15 or the electromagnetic vibration damper as described in claim 16.

Images