Primary assembly, linear motor, electromagnetic shock absorber and vehicle

Abstract

The invention provides a primary assembly, a linear motor, an electromagnetic shock absorber and a vehicle, and the primary assembly comprises a primary iron core which is provided with a hollow cavity; the partition plate is at least partially arranged in the hollow cavity to form a first cavity with one end blocked, the partition plate comprises a barrel, an annular cavity is formed between the barrel and the inner wall of the primary iron core, and the annular cavity is located in the first cavity; and the water outlet end of the water inlet pipeline is arranged in the annular cavity. According to the primary assembly provided by the invention, the hollow cavity and the water inlet pipeline are arranged in the primary iron core, so that the weight of the linear motor is reduced, the force density of the linear motor is improved, and the cooling effect on the linear motor is enhanced.

Description

Technical Field

[0001] 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

[0002] Electromagnetic shock absorbers are widely used in new intelligent vehicle suspensions. They can use electromagnetic induction to control the linear motor to generate damping force in the opposite direction according to road conditions and driving conditions, suppress vehicle vibration, and maintain vehicle stability. The response speed of electromagnetic shock absorbers is as high as 1000Hz, which is 5 times faster than traditional shock absorbers, solving the contradiction between comfort and sportiness.

[0003] In the related art, the primary iron core of the linear motor is formed by axially stacking multiple layers of iron core laminations, which has a complex molding process, low processing efficiency and high cost; 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 increases the occupied space of the linear motor or the cooling structure is complex and difficult to implement.

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

[0005] The present application is proposed to solve at least one of the above problems. The present application provides a primary component, comprising: a primary core, the primary core is provided with a hollow cavity; a partition 12, the partition is at least partially arranged in the hollow cavity to form a first chamber with one end blocked, the partition comprises a cylinder, an annular cavity is arranged between the cylinder and the inner wall of the primary core, and the annular cavity is located in the first chamber; and a water inlet pipe, the water outlet end of the water inlet pipe is arranged in the annular cavity.

[0006] Exemplarily, a water inlet and a water outlet are provided at one end of the primary core 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 to discharge the cooling medium out of the outside of the core.

[0007] Exemplarily, the water inlet pipe is constructed as a hollow annular pipe, the inner tube and outer tube of the annular pipe enclose the water inlet pipe, a gap 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 is provided on the annular pipe, the through hole is connected to the gap, and the through hole is located in the annular cavity.

[0008] Exemplarily, the water inlet pipe is constructed as a hollow annular pipe, 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 in the annular cavity.

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

[0010] 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.

[0011] 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.

[0012] Exemplarily, 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, and a through hole is provided on the side wall of the water inlet pipe, which is connected to the water outlet.

[0013] 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.

[0014] Exemplarily, the cylinder body comprises a cylindrical plate, and the annular bottom plate comprises a circular annular bottom plate.

[0015] 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.

[0016] Exemplarily, 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.

[0017] 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.

[0018] Exemplarily, the primary core includes a core body and a hollow core shaft, the hollow core shaft is sleeved in the core body, and the center hole of the hollow core shaft is configured as the hollow cavity.

[0019] 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 with the water outlet through the first chamber.

[0020] The present application also provides a linear motor, which includes the above-mentioned primary component.

[0021] Exemplarily, the linear motor further includes: a secondary component, wherein the secondary component is sleeved outside the primary component.

[0022] 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.

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

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

[0025] The present application also provides an electromagnetic vibration absorber, characterized in that it includes the above-mentioned linear motor.

[0026] The present application also provides a vehicle, characterized in that it includes the above-mentioned linear motor or the above-mentioned electromagnetic shock absorber.

[0027] 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 setting a cavity and a cooling component in the primary core shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 paying any creative labor.

[0029] Figure 1 shows an overall cross-sectional view of an electromagnetic vibration absorber according to an embodiment of the present application;

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

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

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

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

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

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

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

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

[0038] Figure 7 A schematic diagram of a sensor of an electromagnetic vibration absorber according to an embodiment of the present application is shown;

[0039] In the attached picture:

[0040] 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 reader 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 groove 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. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present application more obvious, the example embodiments according to the present application will be described in detail 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 the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0042] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0043] 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.

[0044] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", 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.

[0045] In order to thoroughly understand the present application, a detailed structure will be proposed 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 as follows, but in addition to these detailed descriptions, the present application may also have other implementation methods.

[0046] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] In one embodiment, Figure 2 , FIG. 3A to FIG. 3D and Figure 5 As shown, the primary assembly 300 provided in the present application includes: a primary core, and the primary core is provided with a hollow cavity 310 .

[0048] In one embodiment, the primary core includes a core body 61 and a hollow core shaft 6 . The hollow core shaft 6 is sleeved in the core body 61 , and the central hole of the hollow core shaft 6 is configured as a hollow cavity 310 .

[0049] Furthermore, the primary component 300 also includes a partition 12, which is at least partially disposed 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. 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 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. The primary component 300 can be cooled by setting the water inlet pipe.

[0051] The water inlet pipe 13 can be implemented in the following manner. In one embodiment, Figure 3D As shown, the water inlet pipe 13 includes at least two branch water inlet pipes 133, and the at least two branch water inlet pipes 133 are arranged at intervals along the circumference of 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, and the inner tube 131 and the outer tube 132 of the annular pipe enclose 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 is connected to the water outlet 322; wherein, a through hole 320 is provided on the annular pipe, and the through hole 320 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 in the annular cavity 120. In other embodiments, such as Figure 3B As shown, the water inlet pipe 13 is constructed as a hollow annular pipe, a gap is provided between the inner tube 131 of the annular pipe and the cylinder of the partition 12, and the gap 130 is connected to the water outlet 322; wherein, a through hole 320 is provided on the annular pipe, the through hole 320 is connected to the gap 130, and the through hole 320 is located in the annular cavity 120. It is worth mentioning that the through hole can be provided in the inner tube or the outer tube, or both the inner tube and the outer tube.

[0052] In some embodiments, the end of the water inlet pipe 13 away from the water inlet 321 is an inclined end surface, which abuts against a portion of the surface of the annular bottom plate 122 facing the water inlet 321. A through hole can be provided on the water inlet pipe 13, and the through hole is connected to the annular cavity.

[0053] In one embodiment, FIG. 3A to FIG. 3DAs shown, a water inlet 321 and a water outlet 322 are provided at one end of the primary core away from the annular cavity 120. The water inlet 321 is used to allow external cooling medium to enter the primary core 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. Exemplarily, the axis of the water outlet 322 coincides with the axis of the hollow cavity 310.

[0054] In one embodiment, FIG. 3A to FIG. 3D The partition 12 further includes an annular bottom plate 122, the annular bottom plate 122 connects the end of the cylinder 121 away from the water outlet 322 and the inner wall of the primary core, the cylinder 121 includes a cylindrical plate, and the annular bottom plate 122 includes a circular ring bottom plate. Figure 3D As shown, the distance 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 d3, and the distance d3 is less than 5 mm.

[0055] In one embodiment, Figure 3B and Figure 3C As shown, one 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, and the through hole is connected to the water outlet 322, that is, the through hole is connected to the space outside the annular cavity of the water inlet pipe, and then connected to the water outlet. Exemplarily, as shown in 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 FIG. Figure 3C As shown, the distance d2 between the center of the through hole 320 and the side of the annular bottom plate 122 facing the water inlet 321 is less than 5 mm.

[0056] 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 .

[0057] In one embodiment, Figure 3A and Figure 3BAs shown, the hollow cavity in the primary 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, thereby enhancing the heat dissipation capacity of the linear motor; since a position reserved for the sensor is set in the primary core, it is necessary to design a partition 12 to seal the primary 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 a "J", and the empty part around it will form a dead water area after the linear motor is passed through the water, which is still advantageous for the heat dissipation of the linear motor compared to the "I" shaped sealing structure; the water inlet 321 should be at least 10 mm away from the top surface of the partition 12 to ensure the water inlet efficiency.

[0058] In one embodiment, Figure 3A and Figure 3B As shown, the axis of one of the water inlet 321 and the water outlet 322 coincides with the axis of the primary core, 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; 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. In this case, 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 pump 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 water inlet 321 and the water outlet 322 are preferably arranged so 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 such an arrangement cannot be guaranteed, the water inlet 321 and the water outlet 322 are preferably placed symmetrically.

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

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

[0062] Exemplarily, the primary component 300 also includes a plurality of windings 14, which are axially arranged in sequence on the core body 61, and a water outlet 322 is provided at the end of the primary core away from the annular cavity 120, and the partition 12 includes an annular bottom plate 122, which is connected to the end of the primary core 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 within the length of the winding, so that the cooling medium exchanges heat through the primary core and the winding, thereby enabling better cooling of the winding.

[0063] 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 is an annular structure, each core unit 5 is respectively sleeved on the outer peripheral surface of the hollow core shaft 6, wherein the core unit 5 is assembled on the hollow core shaft 6 in an interference fit manner, and an annular receiving groove is arranged between adjacent core units 5; the primary component includes a plurality of windings 14 arranged in the receiving groove, each winding 14 is arranged in a receiving groove along the circumference of the core unit 5, and for example, the winding 14 is a pancake winding wound with a 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 selected at a suitable 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, so as to further enhance the heat dissipation capacity of the linear motor.

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

[0065] Continue to refer 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 arranged 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.

[0066] Continue to refer Figure 5The 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 receive the winding 14.

[0067] Continue to refer 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. By way of 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 to generate greater force.

[0068] In one embodiment, in addition to forming the primary core by sleeved core units on a hollow core shaft, the core units form the primary core by connecting the core units to form the primary core by adhesive or welding.

[0069] In one embodiment, the hollow core shaft includes a support plate 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 therein, the support plate being disposed at the second end of the central shaft and extending radially toward the outside of the central shaft.

[0070] For example, the cross-sectional shape of the hollow mandrel 6 is T-shaped, and a support plate is provided at the second end of the hollow mandrel 6, which can avoid the risk of the core unit 5 falling during the movement of the linear motor, and 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 connected by threads.

[0071] To sum up, the core provided in the present application is composed of multiple core units. Compared with the primary iron core composed of stacked silicon steel sheets provided in the related technology, the primary iron core and core units provided in the present application have simple processing technology and easy installation, which reduces processing costs and improves component integration.

[0072] In one embodiment, Figure 4A schematic diagram of electrical connection between windings 14 according to an embodiment of the present application is shown. 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. By way of example, the first wire-passing hole 511 and the second wire-passing hole 511 penetrate the core unit along the axial direction, and 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.

[0073] In one embodiment, the winding 14 includes a first winding and a second winding, the first winding includes a first winding, the second winding includes a second winding, and 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 determine 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 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 according to the needs of the use scenario. Through the arrangement of the first winding and the second winding, the current flow direction in the winding 14 can be controlled.

[0074] In one embodiment, the winding 14 includes a three-phase winding, and the three-phase winding is connected in a star connection. 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 upper tower top 17 and are led out to the outside. Figure 6 FIG. 1 is a schematic diagram showing the connection of the three-phase wires of the linear motor and the end lead wires according to an embodiment of the present application. Figure 6 As shown in the figure, the three-phase line of the linear motor is connected in a star point connection. Figure 6 As shown, the winding of the linear motor forms a star connection at the primary teeth at the bottom end of the core unit, and after passing through the primary teeth of the uppermost core unit in the primary iron core, it is directly led out to the outside, and the three-phase lead wires are fixed on the top surface of the top primary teeth by injection molding; at the same time, the conduction wires of the sensor and the conduction wires of the temperature sensor are also fixed on the top surface in the same way after being led out.

[0075] The present application also provides a linear motor, comprising the aforementioned primary assembly. In one embodiment, Figure 2 FIG. 2 shows a cross-sectional view of a linear motor according to an embodiment of the present application. Figure 2As shown, the linear motor further includes a secondary component, which is sleeved outside the primary component. For example, the secondary component includes a sleeve 3 and a plurality of magnetic steels 4 arranged on the inner side wall of the sleeve 3, the primary iron core is cylindrical, the sleeve is sleeved on the primary iron core, and the secondary component is configured to be able to move relative to the primary component along the axial direction of the primary component. For example, the sleeve 3 is cylindrical; for example, the magnetic steel 4 can be fixed to the inner wall of the sleeve 3 by means of an adhesive.

[0076] In one embodiment, the secondary assembly further includes a guide rod 7, which is fixedly connected to the sleeve 3 and movably inserted into the cylinder 121. Figure 2 As shown, 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. 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 disk of the hollow core shaft. In one embodiment, a support disk is also provided at the second end of the hollow core shaft, and a second buffer 11 is provided below the magnetic steel 4, and the second buffer 11 is opposite to a part of the surface of the support disk. When the secondary assembly moves downward, the first surface of the support disk contacts the second buffer 11 installed under the magnetic steel 4 to limit the position and prevent the primary assembly from being separated from the secondary assembly; when the secondary assembly moves upward, the first buffer 10 contacts the second surface of the support disk of the hollow core shaft 6 to limit the position.

[0078] In one embodiment, the material of the primary component 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 150mm (for example, 145mm, 140mm, 135mm, 130mm, etc.), and the diameter size range of the core unit 5 is not more than 115mm (for example, 110mm, 105mm, 100mm, 95mm, etc.). For example, the motor provided in the present application can provide a force of up to 7kN in a short time.

[0079] In one embodiment, Figure 1 , Figure 2 As shown, the linear motor further includes a displacement sensor, which is used to measure the displacement vectors of the primary component and the secondary component. The displacement sensor includes a magnetic grating sensor, which includes a sensor reading head 9 and a magnetic grating 8. The sensor reading head 9 is arranged in the cavity of the hollow core shaft 6, and a magnetic grating 8 corresponding to the sensor reading head 9 is arranged on the guide rod 7. For example, the corresponding sensor reading head 9 and the magnetic grating 8 are spaced apart by a predetermined distance, wherein the predetermined distance is less than 5 mm, so as to ensure the measurement accuracy of the sensor.

[0080] In one embodiment, the hollow core shaft 6 is preferably made of magnetic conductive material, which can be used as an additional part of the primary iron core 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 that mechanical properties such as stiffness and hardness are met, the choice of hollow core shaft material 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 the magnetic grid 8 sliding in the cavity of the hollow core shaft 6; Figure 2 As shown, 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; a guide rod 7 with a magnetic grid 8 is installed, and the guide rod 7, the cylinder 121 and the hollow cavity 310 are coaxial; the material of the outer shell of the guide rod 7 and the sensor reader 9 is preferably a magnetic isolation material to avoid conducting the magnetic field leaked from the inside of the linear motor to the vicinity of the sensor and affecting the measurement.

[0081] In one embodiment, the magnetic grid 8 includes a first magnetic grid and a second magnetic grid, the first magnetic grid includes a plurality of first magnets arranged along the axial direction, 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, in order to measure the absolute position of the linear motor movement, the magnetic grid of the sensor is calculated using the first magnetic grid and the second magnetic grid (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 calculation of the first magnetic grid and the second magnetic grid in cooperation with each other, it can be determined that the first magnet and the second magnet are on the corresponding magnetic grid).

[0082] 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.

[0083] 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 reading 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.

[0084] In other embodiments, the arrangement of the sensor head and the magnetic grid also includes: Figure 7 The arrangement shown, see Figure 7The 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, technicians 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.

[0085] The present application also provides an electromagnetic vibration absorber, comprising the above-mentioned linear motor. In one embodiment, Figure 1 FIG. 2 shows an overall cross-sectional view of an electromagnetic vibration absorber according to an embodiment of the present application. Figure 1 As shown, 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 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 wheel of the vehicle.

[0086] The present application also provides a vehicle, comprising the aforementioned electromagnetic shock absorber.

[0087] Compared with the related art, this application has the following beneficial effects:

[0088] 1. The primary assembly provided in the present application is composed of a core unit, which is a block-shaped whole rather than a stack of laminated sheets, and the process is simple.

[0089] 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, and has high flexibility. The length of the hollow core shaft and the number of core units can be configured according to actual needs.

[0090] 3. The magnetic grating sensor used in this application can be arranged in the hollow core shaft without occupying the secondary component stroke, 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 if the primary component and the secondary component of the linear motor rotate relative to each other.

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

[0092] 5. The present application integrates the water inlet pipe and the position sensor in the same hollow core shaft, and the structure is compact.

[0093] The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present application to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed by the present application. The scope of protection of the present application is defined by the attached claims and their equivalents.

Claims

1. A primary component, characterized in that include: A primary core, wherein the primary core is provided with a hollow cavity; a partition, the partition being at least partially disposed in the hollow cavity to form a first chamber with one end blocked, the partition comprising a cylinder, an annular cavity being disposed between the cylinder and the inner wall of the primary core, the annular cavity being located in the first chamber; A water inlet pipe, 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 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.

3. The primary component according to claim 2, characterized in that The water inlet pipe is constructed as a hollow annular pipe, and the inner tube and the outer tube of the annular pipe enclose 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 communicated with the water outlet; wherein a through hole is provided on the annular pipe, and the through hole is communicated with 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 assembly according to claim 2, characterized in that The axis of the water outlet coincides with the axis of the hollow cavity.

6. The primary assembly according to claim 2, characterized in that The partition further comprises an annular bottom plate, and the annular bottom plate connects an end of the cylinder away from the water outlet and an 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 assembly according to claim 6, 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 assembly according to claim 6, 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, which is connected to one end of the cylinder close to the water outlet to block one end of the cylinder.

12. The primary assembly according to claim 6, 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 assembly according to claim 2, characterized in that The water inlet pipeline 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.

14. The primary assembly according to claim 1, characterized in that The primary iron core comprises a core body and a hollow core shaft. The hollow core shaft is sleeved in the core body, and a 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, wherein the plurality of windings are 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, 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 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 and a plurality of magnetic steels arranged on the inner side 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, which is fixedly connected to the sleeve and can be movably inserted in 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, characterized in that: Comprising a linear motor as claimed in any one of claims 16 to 20.

22. A vehicle, characterized in that: It comprises the linear motor as claimed in claims 16 to 20 or the electromagnetic vibration absorber as claimed in claim 21.

Images