Primary assembly, linear motor, electromagnetic shock absorber, and vehicle

Abstract

A vehicle, provided with an electromagnetic shock absorber. The electromagnetic shock absorber is provided with a linear motor; the linear motor is provided with a primary assembly; and the primary assembly comprises a primary iron core, a partition plate, and a water inlet pipe. The primary iron core has a hollow cavity; the partition plate is at least partially arranged in the hollow cavity to form a first chamber having one end blocked; and the partition plate comprises a cylinder body, an annular cavity is formed between the cylinder body and the inner wall of the primary iron core, and the annular cavity is located in the first chamber. A water outlet end of the water inlet pipe is arranged in the annular cavity.

Description

Primary component, linear motor, electromagnetic vibration absorber and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311076469.9, filed on August 24, 2023, entitled “A primary component, a linear motor, an electromagnetic vibration absorber and a vehicle,” and the entire contents of that application are incorporated herein for all purposes. Technical Field

[0003] The present application relates to the technical field of linear motors, and more specifically to a primary component, a linear motor, an electromagnetic vibration absorber, and a vehicle. Background Art

[0004] Electromagnetic shock absorbers are widely used in new intelligent vehicle suspension systems. Based on road conditions and driving patterns, they utilize electromagnetic induction to control the damping force generated by a linear motor, suppressing vehicle vibration and maintaining vehicle stability. With a response speed of up to 1000Hz, five times faster than traditional shock absorbers, they address the conflict between comfort and sportiness.

[0005] In the related art, the primary iron core of the linear motor is formed by stacking multiple layers of iron core laminations in the axial direction. The molding process is complex, the processing efficiency is low and the cost is high. At the same time, the sealing structure of the linear motor occupies the primary axial space of the linear motor, resulting in an increase in the volume of the linear motor. Moreover, the cooling structure of the linear motor will increase the space occupied by the linear motor or the cooling structure is complex and difficult to implement.

[0006] Therefore, it is necessary to provide a new primary assembly, linear motor, electromagnetic vibration absorber and vehicle to at least partially solve the above problems.

[0007] Summary of the Invention

[0008] The present application is proposed to address at least one of the above-mentioned problems. The present application provides a primary assembly, comprising: a primary core having a hollow cavity; a partition at least partially disposed within the hollow cavity to form a first chamber with one end blocked, the partition comprising a cylindrical body, an annular cavity being defined between the cylindrical body and the inner wall of the primary core, the annular cavity being located within the first chamber; and a water inlet pipe, the water outlet end of the water inlet pipe being disposed within the annular cavity.

[0009] Exemplarily, the primary core is provided with a water inlet and a water outlet at one end away from the annular cavity, the water inlet is used for allowing external cooling medium to enter the core or for the water inlet pipe to pass through, and the water outlet is used for discharging the cooling medium out of the core.

[0010] Exemplarily, the water inlet pipe is constructed as a hollow annular pipe, the inner cylinder and outer cylinder of the annular pipe enclose the water inlet pipe, and 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 in the annular cavity.

[0011] Exemplarily, 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, and the through hole is connected to the gap, and the through hole is located in the annular cavity.

[0012] Exemplarily, the axis of the water outlet coincides with the axis of the hollow cavity.

[0013] Exemplarily, the partition further includes an annular bottom plate, which connects an end of the cylinder away from the water outlet and an inner wall of the primary iron core.

[0014] Exemplarily, a distance between an end of the water inlet pipe away from the water inlet and a surface of the annular bottom plate facing the water inlet is less than 5 mm.

[0015] Exemplarily, one end of the water inlet pipe away from the water inlet abuts against the side of the annular bottom plate facing the water inlet, and the side of the annular bottom 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, which is connected to the water outlet.

[0016] Exemplarily, the distance between the center of the through hole and the side of the annular bottom plate facing the water inlet is less than 5 mm.

[0017] Exemplarily, the cylinder comprises a cylindrical plate, and the annular bottom plate comprises a circular annular bottom plate.

[0018] Exemplarily, the cylinder further includes a circular top plate, which is connected to one end of the cylinder close to the water outlet to block one end of the cylinder.

[0019] Exemplarily, one end of the water inlet pipe away from the water inlet is an inclined end surface, and the inclined end surface partially abuts against a surface of the annular bottom plate facing the water inlet.

[0020] Exemplarily, the water inlet pipe includes at least two branch water inlet pipes, and the at least two branch water inlet pipes are arranged at intervals along the circumference of the annular cavity.

[0021] Exemplarily, the primary iron core includes a core body and a hollow core shaft, the hollow core shaft is sleeved in the core body, and the central hole of the hollow core shaft is configured as the hollow cavity.

[0022] Exemplarily, it also includes: a plurality of windings, which are arranged in sequence on the core body along the axial direction, a water outlet is provided at the end of the primary iron core away from the annular cavity, and the partition includes an annular bottom plate, which is connected to the end of the primary iron core away from the water outlet; the water outlet end of the water inlet pipe is arranged close to the annular bottom plate, and the water outlet end of the water inlet pipe is connected to the water outlet through the first chamber.

[0023] The present application also provides a linear motor, which includes the above-mentioned primary component.

[0024] Exemplarily, the linear motor further includes: a secondary component, wherein the secondary component is sleeved outside the primary component.

[0025] Exemplarily, the linear motor further includes: the secondary component includes a sleeve and a plurality of magnets arranged on the inner wall of the sleeve; the primary core is cylindrical; and the sleeve is sleeved on the primary core.

[0026] Exemplarily, the linear motor further includes a guide rod, which is fixedly connected to the sleeve and movably inserted into the cylinder.

[0027] Exemplarily, the guide rod, the cylinder and the hollow cavity are coaxial.

[0028] The present application also provides an electromagnetic vibration absorber, characterized in that it includes the above-mentioned linear motor.

[0029] The present application also provides a vehicle, characterized in that it includes the above-mentioned linear motor or the above-mentioned electromagnetic vibration absorber.

[0030] The present application reduces the weight of the linear motor, improves the force density of the linear motor, and enhances the cooling effect of the linear motor by providing a cavity and a cooling component in the primary core shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] FIG1 shows an overall cross-sectional view of an electromagnetic vibration absorber according to an embodiment of the present application;

[0033] FIG2 shows a cross-sectional view of the structure of a linear motor according to an embodiment of the present application;

[0034] FIG3A shows a cross-sectional view of the structure of a primary assembly according to an embodiment of the present application;

[0035] FIG3B shows a cross-sectional view of the structure of a primary assembly according to an embodiment of the present application;

[0036] FIG3C shows a cross-sectional view of the structure of a primary assembly according to an embodiment of the present application;

[0037] FIG3D shows a cross-sectional view of the structure of a primary assembly according to an embodiment of the present application;

[0038] FIG4 shows a schematic diagram of a winding of a linear motor according to an embodiment of the present application;

[0039] FIG5 shows a schematic diagram of a primary unit according to an embodiment of the present application;

[0040] FIG6 is a schematic diagram showing the connection and lead wires of a linear motor according to an embodiment of the present application;

[0041] FIG7 shows a schematic diagram of a sensor of an electromagnetic vibration absorber according to an embodiment of the present application;

[0042] FIG8 shows a schematic block diagram of an electromagnetic vibration absorber according to an embodiment of the present application;

[0043] FIG9A shows a schematic block diagram of a vehicle according to an embodiment of the present application;

[0044] FIG9B shows a schematic block diagram of a vehicle according to another embodiment of the present application;

[0045] In the accompanying drawings: electromagnetic vibration absorber 1, upper tower top 17, spring 18, linear motor 19, three-phase lead wire 2, sleeve 3, magnetic steel 4, core unit 5, hollow core shaft 6, guide rod 7, magnetic grid 8, sensor reading head 9, first buffer 10, second buffer 11, partition 12, water inlet pipe 13, winding 14, first wire 15, second wire 15, first wire hole 511, second wire hole 511, first slot 512, second slot 512 , first positioning member 513, second positioning member 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 body 61, primary iron core 60, secondary component 30. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present application more apparent, the following is a detailed description of example embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments of the present application described in this application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this application.

[0047] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described in order to avoid confusion with the present application.

[0048] It should be understood that the present application can be implemented in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and will fully convey the scope of the present application to those skilled in the art.

[0049] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present application. When used herein, the singular forms "a", "an", and "the" are 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, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0050] In order to fully understand the present application, a detailed structure will be provided in the following description to illustrate the technical solution proposed by the present application. The optional embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods.

[0051] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0052] In one embodiment, as shown in FIG. 2 , FIG. 3A to FIG. 3D and FIG. 5 , the primary assembly 300 provided in the present application includes: a primary core 60 , and the primary core 60 is provided with a hollow cavity 310 .

[0053] In one embodiment, the primary core 60 includes a core body 61 and a hollow core shaft 6 . The hollow core shaft 6 is sleeved in the core body 61 , and a central hole of the hollow core shaft 6 is configured as a hollow cavity 310 .

[0054] Furthermore, the primary component 300 also includes a partition 12, which is at least partially arranged in the hollow cavity 310 to form a first chamber 311 with one end blocked. The partition 12 includes a cylinder 121, and an annular cavity is provided between the cylinder 121 and the inner wall of the primary iron core 60. The annular cavity 120 is located in the first chamber 311.

[0055] Furthermore, the primary component 300 also includes a water inlet pipe 13, the water outlet end of the water inlet pipe 13 is arranged in the annular cavity 120, and the water inlet pipe 13 is used to provide a cooling medium. By setting the water inlet pipe, the primary component 300 can be cooled.

[0056] The water inlet pipe 13 can be implemented in the following manner. In one embodiment, as shown in FIG3D , the water inlet pipe 13 includes at least two branch water inlet pipes 133, which are spaced apart along the circumference of the annular cavity 120. In another embodiment, as shown in FIG3B and FIG3C , the water inlet pipe 13 is constructed as a hollow annular pipe, wherein the inner cylinder 131 and the outer cylinder 132 of the annular pipe enclose the water inlet pipe 13. As shown in FIG3C , 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 is connected to the water outlet 322; wherein the annular pipe is provided with a through hole 320, which is connected to the gap 130, and the gap 130 is connected to the water outlet 322 through the through hole 320, and the through hole 320 is located within the annular cavity 120. In other embodiments, as shown in FIG3B , the water inlet pipe 13 is constructed as a hollow annular pipe, with a gap provided between the inner tube 131 of the annular pipe and the cylindrical body of the partition 12, and the gap 130 communicating with the water outlet 322. The annular pipe is provided with a through hole 320, which communicates with the gap 130 and is located within the annular cavity 120. It is worth noting that the through hole can be provided in the inner pipe or the outer pipe, or in both the inner and outer pipes.

[0057] In some embodiments, the end of the water inlet pipe 13 away from the water inlet 321 is an inclined end face, which abuts against a portion of the annular bottom plate 122 facing the water inlet 321. A through hole can be provided on the water inlet pipe 13, which is connected to the annular cavity.

[0058] In one embodiment, as shown in Figures 3A to 3D , a water inlet 321 and a water outlet 322 are provided at one end of the primary core 60 away from the annular cavity 120. The water inlet 321 is used to allow 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 is used to discharge the cooling medium out of the primary core 60. Exemplarily, the axis of the water outlet 322 coincides with the axis of the hollow cavity 310.

[0059] In one embodiment, as shown in Figures 3A to 3D , the partition 12 further includes an annular bottom plate 122, which connects the end of the cylinder 121 away from the water outlet 322 and the inner wall of the primary core 60. The cylinder 121 comprises a cylindrical plate, and the annular bottom plate 122 comprises a circular ring-shaped bottom plate. For example, as shown in Figure 3D , the distance d3 between the end of the water inlet pipe 13 away from the water inlet 321 and the surface of the annular bottom plate 122 facing the water inlet 321 is less than 5 mm.

[0060] In one embodiment, as shown in Figures 3B and 3C, the end of the water inlet pipe 13 away from the water inlet 321 abuts against the side of the annular bottom plate 122 facing the water inlet 321, and the side of the annular bottom plate 122 facing the water inlet 321 blocks the end of the water inlet pipe 13 away from the water inlet 321. The side wall of the water inlet pipe 13 is provided with a through hole 320, which is connected to the water outlet 322, that is, the through hole is connected to the space outside the annular cavity located outside the water inlet pipe, and then connected to the water outlet. For example, as shown in Figure 3B, the distances d1 and d2 from the center of the through hole 320 to the side of the annular bottom plate 122 facing the water inlet 321 are less than 5 mm. As shown in Figure 3C, the distance d2 from the center of the through hole 320 to the side of the annular bottom plate 122 facing the water inlet 321 is less than 5 mm.

[0061] In one embodiment, the cylinder 121 further includes a circular top plate 123 , which is connected to one end of the cylinder 121 close to the water outlet 322 to block one end of the cylinder 121 .

[0062] 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. The water inlet pipe 13 is connected to the vehicle cooling system. Coolant enters through the central water inlet 321, cools the linear motor, and then flows out through the water outlet pipes on both sides, enhancing the linear motor's heat dissipation capacity. Because a space reserved for sensors is set within the primary core 60, a partition 12 is designed to seal the primary core 60 to prevent leakage from the upper water inlet pipe 13 to the lower part. The partition 12 has a "J" shape. The empty area around the perimeter forms a dead water zone when water flows through the linear motor. Compared with a "I" shaped sealing structure, it still has advantages in heat dissipation for the linear motor. The water inlet 321 should be at least 10 mm away from the top surface of the partition 12 to ensure water inlet efficiency.

[0063] In one embodiment, as shown in Figures 3A and 3B, the axis of one of the water inlet 321 and the water outlet 322 coincides with the axis of the primary iron core 60, the middle of the linear motor water inlet pipe 13 is the water inlet 321, and the water outlet 322 is located on both sides of the water inlet 321; as shown in Figure 3B, if space permits, the pipes on both sides can be set as water inlets 321, and the middle one can be set as water outlets 322. At this time, there is no dead water area in the entire water inlet pipe 13, and the effect is best; to ensure the efficiency of the water inlet pipe 13, the water outlet pipe is generally provided with a water pump to quickly draw water into the vehicle cooling system for circulation; the cooling structure 13 of the linear motor has a water inlet 321 and two water outlets 322; the arrangement of the water inlet 321 and the water outlet 322 is preferably such that the axis of one of them coincides with the axis of the primary iron core 60, so that the water cooling effect of the linear motor is more uniform.

[0064] 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 60. If such an arrangement cannot be guaranteed, the water inlet 321 and the water outlet 322 are preferably placed symmetrically.

[0065] In one embodiment, the primary core 60 and the water inlet pipe 13 can be integrally formed by 3D printing, or connected by threads.

[0066] In one embodiment, the primary core 60 and the partition 12 can be integrally formed by 3D printing, or connected by screws.

[0067] Exemplarily, the primary component 300 also includes a plurality of windings 14, which are arranged in sequence on the core body 61 along the axial direction. A water outlet 322 is provided 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 the end of the primary core 60 away from the water outlet 322. The water outlet end of the water inlet pipe 13 is arranged close to the annular bottom plate 122, and the water outlet end of the water inlet pipe 13 is connected to the water outlet 322 through the first chamber 311 so that the cooling medium contacts the primary core 60 within the length of the winding 14, so that the cooling medium exchanges heat with the primary core 60 and the winding 14, thereby better cooling the winding 14.

[0068] In one embodiment, the core 61 includes a plurality of core units 5 stacked and connected along the axial direction of the hollow core shaft 6, each core unit 5 being an annular structure, and each core unit 5 being respectively sleeved on the outer circumferential surface of the hollow core shaft 6, wherein the core units 5 are assembled on the hollow core shaft 6 in an interference fit manner, and an annular receiving groove is provided between adjacent core units 5; the primary assembly includes a plurality of windings 14 provided in the receiving groove, and each winding 14 is provided in a receiving groove along the circumference of the core unit 5. For example, the winding 14 is a pancake-shaped winding wound with flat wire, and the plurality of windings 14 are electrically connected. In one embodiment, on the basis of ensuring the performance of the motor, a hole can be opened at an appropriate position of the core unit to insert a heat pipe (not shown), and the heat pipe passes upward through the top core unit and is connected to the vehicle cooling system outside the linear motor, thereby further enhancing the heat dissipation capacity of the linear motor.

[0069] In one embodiment, as shown in FIG5 , the core unit 5 includes an annular primary yoke and a primary tooth portion. The primary tooth portion extends radially outward from the primary yoke, and the thickness of the primary yoke along the axial direction is greater than the thickness of the primary tooth portion.

[0070] Continuing 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 core unit 5 and the hollow core shaft 6 during assembly, the first positioning member 513 and the second positioning member 513 provided on the primary yoke are used for circumferential positioning, and the shapes of the first positioning member 513 and the second positioning member 513 include but are not limited to rectangular protrusions and grooves or circular protrusions and grooves, etc.

[0071] Continuing to refer to Figure 5, the core unit 5 is provided with a first slot 512 on the first surface, and the core unit 5 is provided with a second slot 512 on the 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 slot, which is used to accommodate the winding 14.

[0072] Continuing to refer to Figure 5, the core unit 5 is provided with a first limit member, and the hollow core shaft 6 is provided with a second limit member. The first limit member and the second limit member cooperate with each other. For example, one of the first limit member and the second limit member is a protrusion, and the other is a groove. The first limit member and the second limit member are used to fix the relative position of the core unit 5 along the axial direction on the hollow core shaft 6 to prevent the core unit 5 and the hollow core shaft 6 from relative rotation, which is conducive to the linear motor generating greater force.

[0073] In one embodiment, in addition to forming the primary core by sheathing the core units on the hollow core shaft, the core units form the primary core by connecting the core units to form the primary core by adhesive or welding.

[0074] In one embodiment, the hollow core shaft 6 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 a cavity extending axially therein, the support disk being arranged at the second end of the central shaft and extending radially toward the outside of the central shaft.

[0075] For example, the cross-section of the hollow core shaft 6 is T-shaped, and a support plate is provided at the second end of the hollow core shaft 6. The support plate can avoid the risk of the core unit 5 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 and the support plate can be integrally formed by 3D printing or connected by threads.

[0076] To sum up, the core provided by the present application is composed of multiple core units. Compared with the primary iron core composed of stacked silicon steel sheets provided by the related technology, the primary iron core and core units provided by the present application have simple processing technology and easy installation, which reduces processing costs and improves component integration.

[0077] In one embodiment, FIG4 shows a schematic diagram of the electrical connection between the windings 14 according to an embodiment of the present application. Furthermore, each core unit is also provided with a first wire-passing hole 511 and a second wire-passing hole 511. Each winding 14 includes a first lead-out end located at the inner circle of the winding 14 and a second lead-out end located at the outer circle of the winding 14. The first wire 15 is passed through the first wire-passing hole 511 and electrically connects the first lead-out ends of the two windings 14 located at both ends of the first wire-passing hole 511. The second wire 15 is passed through the second wire-passing hole 511 and electrically connects the second lead-out ends of the two windings located at both ends of the second wire-passing hole 511. For example, the first wire-passing hole 511 and the second wire-passing hole 511 pass through the core unit along the axial direction. The first wire 15 is electrically connected in series to different windings via the first wire-passing hole 511, and the second wire 15 is electrically connected in series to different windings via the second wire-passing hole 511.

[0078] In one embodiment, the winding 14 includes a first winding and a second winding, wherein the first winding includes a first winding wire, and the second winding includes a second winding wire, wherein the winding direction of the first winding along the circumferential direction is opposite to the winding direction of the second winding along the circumferential direction. For example, adjacent windings 14 may determine, based on the requirements of the usage scenario, that the winding direction of the first winding along the circumferential direction is clockwise and the winding direction of the second winding along the circumferential direction is counterclockwise, or that the winding direction of the first winding along the circumferential direction is counterclockwise and the winding direction of the second winding along the circumferential direction is clockwise. By arranging the first winding and the second winding in this manner, the direction of current flow in the winding 14 can be controlled.

[0079] In one embodiment, the winding 14 includes a three-phase winding, and the three-phase winding is connected in a star connection. As shown in Figure 2, the linear motor includes a three-phase lead-out line 2. After the three-phase lead-out line 2 converges on the top surface of the linear motor, it passes upward through the upper tower top 17 and is led to the outside. Figure 6 shows a schematic diagram of the connection of the three-phase line of the linear motor and the end face lead-out line in an embodiment of the present application. As shown in Figure 6, the connection method of the three-phase line of the linear motor is a star point connection. As shown in Figure 6, the winding of the linear motor forms a star connection at the primary tooth at the lowest end of the core unit, and after passing through the primary tooth of the uppermost core unit in the primary iron core, it is directly led to the outside, and the three-phase lead-out line is fixed on the top surface of the top primary tooth by injection molding; at the same time, the conductive wire of the sensor and the conductive wire of the temperature sensor are also fixed in the same way on the top surface after being led out.

[0080] The present application also provides a linear motor, comprising the aforementioned primary assembly. In one embodiment, FIG2 shows a structural cross-sectional view of a linear motor according to an embodiment of the present application. As shown in FIG2 , the linear motor further comprises a secondary assembly 30, which is sleeved on the outside of the primary assembly 60. Exemplarily, the secondary assembly 30 comprises a sleeve 3 and a plurality of magnets 4 arranged on the inner side wall of the sleeve 3, the primary core is cylindrical, the sleeve 3 is sleeved on the primary core 60, and the secondary assembly 30 is configured to be able to move relative to the primary assembly 60 along the axial direction of the primary assembly 60. Exemplarily, the sleeve 3 is cylindrical; exemplarily, the magnet 4 can be fixed to the inner wall of the sleeve 3 by means of an adhesive.

[0081] In one embodiment, the secondary assembly 30 further includes a guide rod 7, which is fixedly connected to the sleeve 3 and movably inserted into the cylinder 121. For example, as shown in FIG2 , the inner surface of the sleeve 3 perpendicular to the axial direction is provided with a guide rod 7, and the guide rod 7 is movably inserted into the cylinder 121. For example, the guide rod 7, the cylinder 121, and the hollow cavity 310 are coaxial.

[0082] In one embodiment, the inner surface of the sleeve 3, perpendicular to the axial direction, is provided with a first buffer member 10 corresponding to the support disk of the hollow core shaft 6. In one embodiment, the second end of the hollow core shaft 6 is further provided with a support disk, and a second buffer member 11 is provided below the magnetic steel 4, with the second buffer member 11 facing a portion of the surface of the support disk. When the secondary assembly 30 moves downward, the first surface of the support disk contacts the second buffer member 11 installed below the magnetic steel 4, limiting the position and preventing the primary assembly 60 from separating from the secondary assembly 30. When the secondary assembly 30 moves upward, the first buffer member 10 contacts the second surface of the support disk of the hollow core shaft 6, limiting the position.

[0083] In one embodiment, the material of the primary component 60 includes soft magnetic material. According to the needs of the linear motor application scenario, the outer diameter size range of the sleeve 3 is not more than 150 mm (for example, 145 mm, 140 mm, 135 mm, 130 mm, etc.), and the diameter size range of the core unit 5 is not more than 115 mm (for example, 110 mm, 105 mm, 100 mm, 95 mm, etc.). For example, the motor provided in this application can provide a force of up to 7 kN in a short time.

[0084] In one embodiment, as shown in Figures 1 and 2 , the linear motor further includes a displacement sensor for measuring the displacement vectors of the primary and secondary assemblies. The displacement sensor comprises a magnetic grating sensor, which includes a sensor read head 9 and a magnetic grating 8. The sensor read head 9 is disposed within the cavity of the hollow core shaft 6 , and a magnetic grating 8 corresponding to the sensor read head 9 is disposed on the guide rod 7 . For example, a predetermined distance is separated between the corresponding sensor read heads 9 and the magnetic grating 8 , wherein the predetermined distance is less than 5 mm to ensure the sensor's measurement accuracy.

[0085] In one embodiment, the hollow core shaft 6 is preferably made of a magnetic conductive material and can be used as an additional part of the primary core 60 to improve the performance of the linear motor. At the same time, the magnetic field leaked from the core unit 5 can be guided out through the hollow core shaft 6 to protect the sensor reader 9 in the shaft from interference. Under the premise of meeting mechanical properties such as stiffness and hardness, the material selection of the hollow core shaft 6 includes but is not limited to structural steel, mold steel, etc. The hollow core shaft 6 is set to a hollow form to reduce the use of materials, reduce weight and reduce costs, and meet the requirements of the guide rod 7 equipped with a magnetic grid 8 to slide within the cavity of the hollow core shaft 6. As shown in Figure 2, the sensor is arranged inside the linear motor, and the sensor reader 9 is located inside the hollow core shaft 6 instead of the bottom surface of the primary core, so as not to occupy the stroke of the secondary component of the linear motor. The guide rod 7 equipped with a magnetic grid 8 is coaxial with the guide rod 7, the cylinder 121 and the hollow cavity 310. The material of the outer shell of the guide rod 7 and the sensor reader 9 is preferably a magnetic isolation material to prevent the magnetic field leaked from the interior of the linear motor 19 from being conducted to the vicinity of the sensor and affecting the measurement.

[0086] In one embodiment, the magnetic grid 8 includes a first magnetic grid and a second magnetic grid, wherein the first magnetic grid includes a plurality of first magnets arranged along the axial direction, and the second magnetic grid includes a plurality of second magnets arranged along the axial direction, wherein the first magnetic grid and the second magnetic grid have the same length along the axial direction, and the first magnet and the second magnet have different magnetic pole lengths. In one embodiment, to measure the absolute position of the linear motor movement, the magnetic grid of the sensor uses the first magnetic grid and the second magnetic grid for calculation (because the magnetic fields generated by the first magnet and the second magnet of different lengths are different, through the asymmetric design of the first magnet and the second magnet and the coordinated calculation of the first magnetic grid and the second magnetic grid, it can be determined that the first magnet and the second magnet are on the corresponding magnetic grid).

[0087] In one embodiment, the first magnetic grid and the second magnetic grid are symmetrically arranged on the guide rod, corresponding to the sensor reading head.

[0088] In one embodiment, the magnetic grating is a fan-shaped ring structure to ensure that during the operation of the linear motor, if the magnetic grating and the read head position rotate relative to each other, their position spacing can be kept unchanged, and the position information can still be detected without affecting the measurement accuracy.

[0089] In other embodiments, the arrangement of the sensor reader and the magnetic grid also includes the arrangement shown in Figure 7. Referring to Figure 7, the sensor reader is located in the groove on the bottom surface of the support plate, and the magnetic grid is arranged on the inner wall of the sleeve below the magnetic steel, which also does not occupy the stroke of the secondary component; further, in the above arrangement, technical personnel in this field can perform corresponding verification on the stress and deformation of the hollow core shaft 6 according to the actual application scenario, and this application does not make further limitations here.

[0090] As shown in Figure 8, the present application also provides an electromagnetic shock absorber 1, including the above-mentioned linear motor 19. In one embodiment, Figure 1 shows an overall cross-sectional view of an electromagnetic shock absorber according to an embodiment of the present application. As shown in Figure 1, the electromagnetic shock absorber 1 includes an upper tower top 17, a spring 18 and a linear motor 19, wherein the upper tower top 17 is fixed to the body of the vehicle by bolts, and the linear motor 19 is fixed to the upper tower top 17 by a nut (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 wheel of the vehicle.

[0091] As shown in FIG. 9A and FIG. 9B , the present application further provides a vehicle 900 , comprising the aforementioned electromagnetic vibration absorber 1 or linear motor 19 .

[0092] Compared with the related art, this application has the following beneficial effects:

[0093] 1. The primary assembly provided in this application is composed of core units, which are block-shaped rather than laminated, and the process is simple.

[0094] 2. The primary component of the present application is assembled from core units. The number of core units corresponds to the length of the hollow core shaft, which is highly flexible and can configure the length of the hollow core shaft and the number of core units according to actual needs.

[0095] 3. The magnetic grating sensor used in this application can be arranged in the hollow core shaft without occupying the secondary component stroke, accurately measuring the absolute position of the motor movement; the design of the annular magnetic grating strips ensures that the primary component and the secondary component of the linear motor can achieve position measurement even when relative rotation occurs.

[0096] 4. In this application, by changing the winding method of the winding, the current flow direction in the winding can be flexibly controlled.

[0097] 5. This application integrates the water inlet pipe and the position sensor into the same hollow core shaft, resulting in a compact structure.

[0098] The present application has been described through the above-described embodiments, but it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present application to the described embodiments. In addition, it will be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and that various variations and modifications may be made based on the teachings of the present application, all of which fall within the scope of protection claimed in the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A primary component (300), characterized in that: include: A primary iron core (60), wherein the primary iron core is provided with a hollow cavity (310); a partition (12), the partition being at least partially disposed in the hollow cavity to form a first chamber (311) with one end blocked, the partition comprising a cylinder (121), an annular cavity (120) being disposed between the cylinder and the inner wall of the primary core, the annular cavity being located in the first chamber; as well as A water inlet pipe (13), wherein the water outlet end of the water inlet pipe is arranged in the annular cavity.

2. The primary component according to claim 1, characterized in that An end of the primary iron core away from the annular cavity is provided with a water inlet (321) and a water outlet (322), the water inlet is used for allowing external cooling medium to enter the primary iron core or for the water inlet pipe to pass through, and the water outlet is used for discharging the cooling medium out of the outside of the primary iron core.

3. The primary component according to claim 2, characterized in that The water inlet pipeline is constructed as a hollow annular pipeline, and the inner cylinder (131) and the outer cylinder (132) of the annular pipeline enclose the water inlet pipeline; A gap (130) is provided between the outer tube 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 (320) is provided on the annular pipe, and the through hole is connected to the gap, and the through hole is located in the annular cavity.

4. The primary component according to claim 2, characterized in that 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 with the water outlet; wherein, a through hole is provided on the annular pipe, and the through hole is connected with the gap, and the through hole is located in the annular cavity.

5. The primary component according to any one of claims 2 to 4, characterized in that 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, characterized in that The partition further comprises an annular bottom plate (122), wherein the annular bottom plate connects an end of the cylinder away from the water outlet and the inner wall of the primary iron core.

7. The primary assembly according to claim 6, characterized in that The distance between one end of the water inlet pipe away from the water inlet and a 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, characterized in that One end of the water inlet pipe away from the water inlet abuts against a side of the annular bottom plate facing the water inlet, and the side of the annular bottom plate facing the water inlet blocks the end of the water inlet pipe away from the water inlet. A through hole is provided on the side wall of the water inlet pipe, and the through hole is connected to the water outlet.

9. The primary assembly according to claim 8, characterized in that The distance between the center of the through hole and the side 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, characterized in that The cylinder body comprises a cylindrical plate, and the annular bottom plate comprises a circular annular bottom plate.

11. The primary assembly according to claim 10, characterized in that The cylinder also includes a circular top plate (123), which is connected to one end of the cylinder close to the water outlet to block one end of the cylinder.

12. The primary component according to any one of claims 6 to 11, characterized in that One end of the water inlet pipe away from the water inlet is an inclined end surface, and the inclined end surface abuts against a surface of the annular bottom plate facing the water inlet.

13. The primary component according to any one of claims 2 to 12, characterized in that The water inlet pipeline comprises at least two branch water inlet pipes (133), and the at least two branch water inlet pipes are arranged at intervals along the circumference of the annular cavity.

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

15. The primary assembly according to claim 14, characterized in that Also includes: A plurality of windings (14), the plurality of windings being sequentially arranged 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 bottom plate, and the annular bottom plate is connected to an end of the primary core away from the water outlet; The water outlet end of the water inlet pipe is arranged close to the annular bottom plate, and the water outlet end of the water inlet pipe is communicated with the water outlet through the first chamber.

16. A linear motor (19), characterized in that: Comprising a primary component as claimed in any one of claims 1 to 15.

17. The linear motor according to claim 16, characterized in that: Also includes: A secondary component (30) is sleeved outside the primary component.

18. The linear motor according to claim 17, characterized in that: Also includes: The secondary component comprises a sleeve (3) and a plurality of magnetic steels (4) arranged on the inner wall of the sleeve; the primary iron core is cylindrical; and the sleeve is sleeved on the primary iron core.

19. The linear motor according to claim 18, characterized in that: It also includes a guide rod (7), which is fixedly connected to the sleeve and can be movably inserted into the cylinder.

20. The linear motor according to claim 19, characterized in that The guide rod, the cylinder and the hollow cavity are coaxial.

21. An electromagnetic vibration absorber (1), characterized in that: Comprising a linear motor as claimed in any one of claims 16 to 20.

22. A vehicle (900), characterized in that: It comprises a linear motor as claimed in any one of claims 16 to 20 or an electromagnetic vibration absorber as claimed in claim 21.

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