Linear motor, air spring damper, suspension system and vehicle

Abstract

The invention discloses a linear motor, an air spring shock absorber, a suspension system and a vehicle, and the linear motor comprises a housing which forms an accommodation cavity in an enclosing manner; the stator assembly and the rotor assembly are accommodated in the accommodating cavity and can move in a mutually matched manner; and the position detection assembly is arranged on the outer side of the accommodating cavity. Due to the fact that the stator assembly and the mover assembly are seriously heated in the moving process and can generate electromagnetic interference, the position detection assembly is arranged outside the containing cavity and is separated from the stator assembly and the mover assembly through the shell, the service life of the position detection assembly is prolonged, and follow-up maintenance and replacement are facilitated.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a linear motor, an air spring shock absorber, a suspension system and a vehicle. Background Art

[0002] Existing linear motor position sensors are typically installed inside the motor housing, with a portion mounted close to the center rod and the motor's high-voltage wiring. This can easily cause electromagnetic interference to the position sensor when the motor's high voltage is applied. Furthermore, the motor's center rod typically generates significant heat due to high-speed motion, which can affect the position sensor's accuracy after prolonged operation. Furthermore, when the sensor is installed inside the motor housing, the wiring harness must be routed through the casing, making it difficult to repair or replace. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, an object of the present invention is to propose a linear motor, comprising: a shell, which encloses a accommodating cavity; a stator assembly and a mover assembly, which are accommodated in the accommodating cavity and can move in coordination with each other; and a position detection assembly, which is arranged outside the accommodating cavity.

[0005] According to some embodiments of the linear motor of the present invention, the position detection assembly includes a sensing element, and the sensing element is provided on the housing to detect the position of the mover assembly.

[0006] According to the linear motor of some embodiments of the present invention, the induction component is embedded in the housing.

[0007] According to the linear motor of some embodiments of the present invention, the thickness of the induction element is smaller than the wall thickness of the housing, and the induction element is embedded between the inner wall surface and the outer wall surface of the housing.

[0008] According to the linear motor of some embodiments of the present invention, the position detection component also includes an inductive reading head, which is arranged on the outside of the shell. In the movement direction of the movable subassembly, the inductive reading head and the inductive member are coupled to detect the position of the movable subassembly.

[0009] According to some embodiments of the linear motor of the present invention, the position detection component further includes an induction harness, and the induction harness extends outward from the interior of the induction read head.

[0010] According to some embodiments of the linear motor of the present invention, the induction component is a magnetic grid, and the magnetic grid includes a magnetic pole mounting plate and a plurality of magnetic poles mounted on the magnetic pole mounting plate.

[0011] According to the linear motor of some embodiments of the present invention, the plurality of magnetic poles are arranged in sequence along the length direction of the magnetic grid.

[0012] According to some embodiments of the linear motor of the present invention, the mover component is a magnetic steel, and the stator component is a coil winding.

[0013] According to some embodiments of the present invention, the linear motor further includes an upper bearing and a lower bearing, wherein the upper bearing and the lower bearing are located between the stator assembly and the mover assembly.

[0014] The present invention further provides an air spring shock absorber, comprising the above-mentioned linear motor, wherein one of the stator assembly and the mover assembly is suitable for connection to a wheel, and the other is suitable for connection to a vehicle body.

[0015] According to some embodiments of the present invention, the air spring shock absorber further includes an air spring, which includes a support seat and a bladder skin. The support seat is suitable for being fixedly connected to the vehicle body and together with the bladder skin to form an air cavity, and the position detection component is arranged on the outside of the air cavity.

[0016] According to some embodiments of the present invention, the air spring damper further includes a guard plate, at least a portion of which is wrapped around the outside of the bladder skin and extends along the length direction of the shell to form an extended space between the outside of the air cavity and the outer wall of the shell.

[0017] According to the air spring damper of some embodiments of the present invention, the inductive reading head is disposed in the extension space.

[0018] According to the air spring damper of some embodiments of the present invention, one end of the inductive reading head is fixedly connected to the guard plate, and the other end is coupled to the inductive component to detect the position of the mover assembly.

[0019] The present invention also provides a suspension system including the above-mentioned air spring shock absorber.

[0020] The present invention also provides a vehicle comprising the above suspension system.

[0021] A linear motor provided by one embodiment of the present invention can prevent thermal and electromagnetic hazards caused by the mutual movement of the stator and mover assemblies by disposing the position detection assembly outside the housing, separating it from the stator and mover assemblies. This also prevents contamination by the bearing lubricant between the stator and mover assemblies, which could affect position detection accuracy. This can help improve the lifespan of the position detection assembly. In addition, the wiring harness of the position detection assembly does not pass through the housing but is completely located outside the housing, which also facilitates subsequent maintenance and replacement.

[0022] Another embodiment of the present invention provides an air spring shock absorber. Since the air spring shock absorber has special air tightness requirements, the position detection component is completely arranged outside the air cavity. There is no need to consider the air spring leakage problem that may be caused by the wiring harness of the induction reader passing through the air cavity, which is also beneficial to the life of the air spring.

[0023] The advantages of the suspension system, the vehicle, and the air spring shock absorber compared to the prior art are the same and will not be described in detail here.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 This is an appearance diagram of a linear motor air suspension according to an embodiment of the present invention; Figure 2 is a cross-sectional view of a linear motor air suspension according to an embodiment of the present invention; Figure 3 is an enlarged view of the arrangement of the position detection components according to one embodiment of the present invention; Figure 4 is a schematic diagram of a position detection component according to an embodiment of the present invention.

[0026] Reference numerals: Air spring damper 100; Shell-1; Accommodation chamber-11; Stator assembly-21; center rod-211; mover assembly-22; guide rod-221; Position detection component-3; induction component-31; magnetic pole mounting plate-311; magnetic pole-312 induction reading head-32; induction wiring harness-33; Upper bearing-41; Lower bearing-42; Air spring-5; support seat-51; bladder skin-52; air cavity-53; guard plate-54; extension space-55; High voltage outlet device-6; Lower wishbone -7. DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] Hereinafter, a linear motor according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0029] Linear motors are a type of linear reciprocating motion. Traditional linear motors use alternating current to generate magnetic force, which interacts with a permanent magnetic field to produce linear reciprocating motion. Linear motors are used in automobile suspension systems as actuators for active suspensions. On flat roads or roads with small amplitudes, they can effectively filter vibrations and improve vehicle driving comfort. On roads with large amplitudes or poor passability, the linear motor actively adjusts the height of the vehicle body to ensure that the vehicle can smoothly pass over bumpy roads. For active suspension to be able to quickly and efficiently adjust suspension movement, the prerequisite is to accurately identify road conditions and vehicle body posture. The existing technology uses a combination of pre-aiming systems, height sensors, position sensors, etc., and controls the z-direction movement of the suspension motor through a vehicle body motion calculation model to achieve vehicle body height adjustment. In existing technical solutions, the position sensor is generally arranged in the central area inside the linear motor, such as on the center rod, which has disadvantages such as high temperature, electromagnetic interference, and short life.

[0030] like Figure 1-Figure 2 As shown, one object of the present invention is to provide a linear motor, comprising: a housing 1, the housing 1 enclosing a housing cavity 11; a stator assembly 21 and a mover assembly 22, the stator assembly 21 and the mover assembly 22 being housed in the housing cavity 11 and capable of cooperating with each other for movement; and a position detection assembly 3, the position detection assembly 3 being disposed outside the housing cavity 11. Because the stator assembly 21 and the mover assembly 22 in the housing cavity 11 generate heat by high-speed relative motion, a high-voltage outlet device 6 guides the three-phase outlet of the motor from the center rod 211 of the housing cavity 11. At this point, the entire housing cavity 11 of the motor, especially the center rod 211 area, is in the high-temperature zone of the suspension system. High temperatures can affect the accuracy of the position detection assembly 3, thereby affecting the efficient and precise control and adjustment of the active suspension. Placing the position detection assembly 3 outside the housing cavity 11 allows the position detection assembly 3 to avoid the high-temperature zone through the housing 1. At the same time, the housing 1 also acts as an electromagnetic shield, shielding electromagnetic interference from the internal stator assembly 21 and mover assembly 22, as well as the high-voltage outlet wires.

[0031] like Figure 2 As shown, according to some embodiments of the linear motor of the present invention, the position detection component 3 includes a sensor 31, which is provided on the housing 1 to detect the position of the mover assembly 22. In the relevant embodiments of the linear motor, the housing 1 can be connected to the vehicle body as the stator assembly 21, or connected to the wheel as the mover assembly 22, as long as the housing 1 as a whole wraps around the linear motor to form the boundary of the electromagnetic barrier. When the housing 1 and the mover assembly 22 are fixed (see this embodiment), the position detection component 3 includes a sensor 31, which is provided on the housing 1 to detect the position of the mover assembly 22. Figure 2), the sensing member 31 is essentially arranged on the mover and performs linear motion relative to the vehicle body; when the housing 1 is connected to the vehicle body as the stator assembly 21 (not shown in the figure), the sensing member 31 is essentially arranged on the stator and is stationary relative to the vehicle body; but no matter whether the sensing member 31 is arranged on the mover assembly 22 or the stator assembly 21, as long as the sensing member 31 is arranged at the boundary of two components with relative motion, it can cooperate to detect the position of the movement of the mover assembly 22.

[0032] like Figure 2-3 As shown, according to some embodiments of the linear motor of the present invention, the induction element 31 is embedded in the housing 1. Since the induction element 31 itself has a thickness and a fixed stroke length, if it protrudes too much from the housing 1, it will not only be exposed outside the housing 1 and easily fall off during long-term motion, but it will also easily cause jamming during the motion of related components.

[0033] like Figure 2-3 As shown, in the linear motor according to some embodiments of the present invention, the thickness of the induction part 31 is less than the wall thickness of the shell 1, and is embedded between the inner wall surface and the outer wall surface of the shell 1. In this embodiment, the shell 1 completely wraps the induction part 31, and the induction part 31 is completely embedded in the interior of the shell 1 and cannot be seen. It is located between the inner wall surface and the outer wall surface of the shell 1, forming a double barrier between the inner wall surface and the outer wall surface of the shell 1. The inner wall surface of the shell 1 isolates the electromagnetic interference of the stator assembly 21 and the mover assembly 22 in the accommodating cavity 11. The outer wall surface of the shell 1 isolates the precision induction part 31 from pollution by external dust, foreign matter, etc., thereby improving the life of the induction part 31.

[0034] like Figure 2-3 As shown, according to the linear motor of some embodiments of the present invention, the position detection component 3 also includes an inductive reading head 32. The inductive reading head 32 is arranged on the outside of the housing 1. In the movement direction of the mover assembly 22, the inductive reading head 32 and the inductive member 31 are coupled to detect the position of the mover assembly 22. Specifically, as long as there is relative movement between the inductive reading head 32 and the inductive member 31, it is sufficient to detect the stroke position of the mover assembly 22. When the inductive member 31 is fixed to the mover assembly 22, the inductive reading head 32 needs to be fixed to the stator assembly 21. When the inductive member 31 is fixed to the stator assembly 21, the inductive reading head 32 needs to be fixed to the mover assembly 22. The fixing method of the inductive reading head 32 can be bolt connection, pin connection, etc. This patent only limits the arrangement position of the inductive reading head 32, and does not limit the specific fixing method of the inductive reading head 32. As long as the solution can be implemented, it is sufficient. The induction reading head 32 is arranged on the outside of the shell 1. There is no need to make additional grooves for the leads on the shell 1, nor is there any need to make additional sealing and dust-proof designs for the wiring harness outlet position of the detection component. This simplifies the processing difficulty of the linear motor and facilitates maintenance. During maintenance, there is no need to remove the entire linear motor shell 1, and maintenance can be carried out directly outside the shell 1.

[0035] like Figure 3-4 As shown, according to some embodiments of the linear motor of the present invention, the position detection component 3 further includes an induction harness 33, and the induction harness 33 extends outward from the inside of the induction reader 32. The induction harness 33 is generally fixedly connected to the induction reader 32, and the induction harness 33 needs to transmit the position detection signal to the controller through the harness. The controller is usually far away from the linear motor and is located outside the linear motor. The induction reader 32 is set outside the linear motor housing 1, that is, the induction harness 33 is also located outside the housing 1. There is no need to punch holes in any parts to allow the harness to pass through, which reduces the cumbersome process of processing and installation, and also reduces the phenomenon of jamming, wear, etc. caused by the swing of the harness during movement.

[0036] like Figure 4 As shown, according to some embodiments of the linear motor of the present invention, the sensing element 31 is a magnetic grid, which includes a magnetic pole mounting plate 311 and multiple magnetic poles 312 mounted on the magnetic pole mounting plate 311. Optionally, this solution uses a magnetic grid magnetic strip sensing element 31, which generates magnetic fields of varying strengths by arranging multiple magnetic poles 312 to indicate the position of the mover assembly 22. Sensing elements 31 of other properties may also be used, as long as they can detect the position of the mover assembly 22.

[0037] like Figure 4 As shown, in some embodiments of the linear motor according to the present invention, multiple magnetic poles 312 are arranged in sequence along the length of the magnetic grid. The arrangement of the magnetic poles 312 along the length of the magnetic grid aligns with the direction of motion of the mover assembly 22, allowing for more direct detection of the current motion state of the mover assembly 22 and transmission of position signals to the inductive read head 32.

[0038] like Figure 2-3 As shown, in a linear motor according to some embodiments of the present invention, the mover assembly 22 is a magnet, and the stator assembly 21 is a coil winding. In this embodiment, the stator assembly 21 is located on the center rod 211, and the magnet is located outside the stator assembly 21. Since the coil winding is the main component that generates heat during the operation of the linear motor, and the high-voltage output device 6 is located inside the center rod 211, the closer it is to the stator assembly 21, the higher the temperature and the stronger the electromagnetic interference. The center rod 211 is the area with the highest heat generation in the entire linear motor. If the position detection component 3 is set nearby, high temperature and battery interference will disrupt the position sensing accuracy. If the position detection component 3 is set at the location of the principle magnet and coil winding (outside the shell 1), this problem can be circumvented.

[0039] like Figure 2As shown, according to some embodiments of the present invention, the linear motor further includes an upper bearing 41 and a lower bearing 42, which are located between the stator assembly 21 and the mover assembly 22. Specifically, a center rod 211 extends above the stator assembly 21, the mover assembly 22 is fixed to the housing 1, and the upper bearing 41 is arranged between the center rod 211 and the housing 1; the mover assembly 22 also includes a guide rod 221, and the lower bearing 42 is arranged between the guide rod 221 and the stator assembly 21, forming a double support for the upper and lower bearings. Bearings are usually lubricated with lubricating oil. If the sensor is too close to the bearing position, grease or other lubricating oil can easily contaminate the position detection assembly 3 during the up and down movement of the mover assembly 22 and the stator assembly 21, thereby affecting the accuracy of the position detection assembly 3 and the accuracy of the linear motor position detection. In this solution, the upper bearing 41 and the lower bearing 42 are both arranged in the accommodating cavity 11 of the housing 1, while the position detection assembly 3 is arranged outside the accommodating cavity 11, which can avoid the influence of the flowing lubricating material on the position detection assembly 3.

[0040] The linear motor provided by one embodiment of the present invention can avoid thermal and electromagnetic hazards caused by the mutual movement of the stator assembly 21 and the mover assembly 22 by arranging the position detection assembly 3 outside the housing 1 and separating it from the stator assembly 21 and the mover assembly 22. It also avoids contamination by the bearing lubricating oil between the stator assembly 21 and the mover assembly 22, thereby affecting the position detection accuracy, which can help to improve the life of the position detection assembly 3. In addition, the wiring harness of the position detection assembly 3 does not pass through the housing 1 but is completely located outside the housing 1, which is also convenient for subsequent maintenance and replacement.

[0041] like Figure 1-2As shown, the present invention also proposes an air spring 5 shock absorber 100, including the above-mentioned linear motor, one of the stator assembly 21 and the mover assembly 22 is suitable for connection to the wheel, and the other is suitable for connection to the vehicle body. The air spring 5 can effectively filter vibrations and improve the driving comfort of the vehicle, and its effect is better than that of a general coil spring. In this patent, the high-voltage outlet device 6 is fixedly connected to the center rod 211 by glue, the stator assembly 21 is fixedly connected to the center rod 211 by a nut, the air spring 5 is buckled and installed on the housing 1 of the linear motor, the upper bearing 41 is installed on the housing 1, the center rod 211 and the upper bearing 41 are installed with a small gap, the magnetic steel is installed inside the housing 1, the guide rod 221 is fixedly connected to the housing 1 by bolts, the lower bearing 42 is installed inside the stator assembly 21, the guide rod 221 and the lower bearing 42 are installed with a small gap, and the shock absorber lower fork arm 7 is fixedly connected to the guide rod 221. The air spring 5 is located outside the motor housing 1, forming a semi-enclosed structure for the linear motor. If the position detection component 3 were located inside the linear motor housing 1, the use of the air spring 5 would require further consideration of air leakage from the sensor output wires into the air spring, which would have a greater impact on the shock absorber itself. However, in this solution, the detection component is placed outside the housing 1, eliminating the risk of air leakage into the air spring.

[0042] like Figure 1-2 As shown, the air spring 5 shock absorber 100 according to some embodiments of the present invention further includes an air spring 5, which includes a support base 51 and a bladder skin 52. The support base 51 is adapted to be fixedly connected to the vehicle body and together with the bladder skin 52, encloses an air cavity 53. The position detection component 3 is arranged outside the air cavity 53. The support base 51 is fixedly connected to the center rod 211 via a large nut, and the bladder skin 52 is fixedly connected to the support base 51. The position detection component 3 of the present patent is arranged outside the air cavity 53 of the air spring 5, eliminating the need to lead a wiring harness from the air cavity 53 to the outside, and eliminating the risk of air leakage from the air spring. like Figure 2-3 As shown, the air spring 5 shock absorber 100 according to some embodiments of the present invention further includes a guard plate 54. At least a portion of the guard plate 54 is wrapped around the outside of the bladder 52 and extends along the length of the housing 1 to form an extension space 55 between the outside of the air cavity 53 and the outer wall of the housing 1. Because the air spring 5 is squeezed during the motion of the linear motor, the function of the guard plate 54 is to limit the maximum diameter of the air spring 5 that can be squeezed and expanded. Preferably, the guard plate 54 can be appropriately extended to form an extension space 55. Certain parts within the extension space 55 are protected from scratches or contamination by surrounding parts.

[0043] like Figure 2-3As shown, according to some embodiments of the present invention, the air spring 5 shock absorber 100 has an inductive reading head 32 disposed within the extension space 55. Since the inductive reading head 32 is a precision component, placing the inductive reading head 32 within the extension space 55 enclosed by the guard plate 54 can prevent interference with surrounding components of the shock absorber during movement. Furthermore, the protective function of the guard plate 54 also provides a certain degree of dustproofing, thereby ensuring the detection accuracy of the inductive reading head 32.

[0044] like Figure 2-3 As shown, according to some embodiments of the present invention, in the air spring 5 damper 100, one end of the inductive read head 32 is fixedly connected to the guard plate 54, and the other end is coupled to the inductive element 31 to detect the position of the mover assembly 22. Alternatively, the inductive read head 32 can be fixedly connected to the inner side of the guard plate 54 by bolts, pins, etc., and the other end is coupled to the inductive element 31.

[0045] Another embodiment of the present invention provides an air spring 5 shock absorber 100. Since the air spring 5 shock absorber 100 has special air tightness requirements, the position detection component 3 is completely set outside the air cavity 53. There is no need to consider the air spring leakage problem that may be caused by the wiring harness of the induction reader 32 passing through the air cavity 53, which is also beneficial to the life of the air spring 5.

[0046] The present invention also provides a suspension system, comprising the air spring 5 and shock absorber 100 described above.

[0047] According to the suspension system of an embodiment of the present invention, by completely setting the position detection component 3 outside the air cavity 53 of the shock absorber 100 of the air spring 5, there is no need to consider the air spring leakage problem that may be caused by the wiring harness of the induction reading head 32 passing through the air cavity 53, which is also beneficial to the life of the air spring 5.

[0048] The present invention also provides a vehicle comprising the above suspension system.

[0049] According to the suspension system of an embodiment of the present invention, by completely setting the position detection component 3 outside the air cavity 53 of the shock absorber 100 of the air spring 5, there is no need to consider the air spring leakage problem that may be caused by the wiring harness of the induction reading head 32 passing through the air cavity 53, which is also beneficial to the life of the air spring 5.

[0050] The operating principle of this patent is as follows: When a vehicle passes over a bumpy road or speed bump, the up-and-down movement of the wheels causes the suspension lower arm and lower wishbone to bounce up and down, and the guide rod and housing connected to the lower wishbone also move up and down. This movement also causes the induction element (magnetic grid) embedded in the housing to move up and down. At this point, the induction head detects the magnetic field changes of the induction element, converts them into electrical signals, and transmits them via the induction wiring harness to the MCU controller of the active suspension system. The active suspension system calculates the control signal through the MCU controller, which then outputs the corresponding current through the high-voltage output device of the linear motor to the stator assembly of the linear motor. When energized, the magnetic field of the linear motor stator assembly interacts with the magnetic field of the linear motor's rotor assembly (magnets) to generate an interaction force along the height of the vehicle body. By controlling the direction and magnitude of the current, the direction and magnitude of the magnetic field force are changed. The linear motor's rotor assembly moves up and down under the influence of the magnetic field, offsetting the up-and-down movement of the wheel, thereby achieving a level and stable vehicle posture.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0053] In the description of the present invention, "plurality" means two or more.

[0054] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0055] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0056] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A linear motor, characterized in that: include: a housing, wherein the housing encloses a receiving cavity; a stator assembly and a mover assembly, wherein the stator assembly and the mover assembly are accommodated in the accommodation cavity and can move in coordination with each other; A position detection component is arranged outside the accommodating cavity.

2. The linear motor according to claim 1, wherein: The position detection component includes a sensing element, which is arranged on the housing to detect the position of the movable component.

3. The linear motor according to claim 2, wherein: The induction component is embedded in the shell.

4. The linear motor according to claim 3, characterized in that The thickness of the induction element is smaller than the wall thickness of the shell, and the induction element is embedded between the inner wall surface and the outer wall surface of the shell.

5. The linear motor according to claim 2, characterized in that: The position detection assembly further includes an inductive reading head, which is disposed on the outside of the housing. In the movement direction of the movable assembly, the inductive reading head is coupled to the inductive member to detect the position of the movable assembly.

6. The linear motor according to claim 5, characterized in that The position detection component further includes an induction harness, which extends outward from the interior of the induction reading head.

7. The linear motor according to claim 2, characterized in that: The induction component is a magnetic grid, and the magnetic grid includes a magnetic pole mounting plate and a plurality of magnetic poles mounted on the magnetic pole mounting plate.

8. The linear motor according to claim 7, characterized in that: The plurality of magnetic poles are arranged in sequence along the length direction of the magnetic grid.

9. The linear motor according to claim 1, wherein: The mover component is a magnetic steel, and the stator component is a coil winding.

10. The linear motor according to claim 1, wherein: It also includes an upper bearing and a lower bearing, wherein the upper bearing and the lower bearing are located between the stator assembly and the mover assembly.

11. An air spring shock absorber, characterized in that: The linear motor comprises the linear motor according to any one of claims 1 to 10, wherein one of the stator assembly and the mover assembly is suitable for connection to a wheel, and the other is suitable for connection to a vehicle body.

12. The air spring damper according to claim 11, characterized in that: It also includes an air spring, which includes a support seat and a bladder skin. The support seat is suitable for being fixedly connected to the vehicle body and together with the bladder skin forms an air cavity. The position detection component is arranged on the outside of the air cavity.

13. The air spring damper according to claim 12, characterized in that: It also includes a guard plate, at least a portion of which is wrapped around the outside of the bladder skin and extends along the length direction of the shell to form an extended space between the outside of the air cavity and the outer wall of the shell.

14. The air spring damper according to claim 13, wherein: The inductive reading head is arranged in the extension space.

15. The air spring damper according to claim 14, characterized in that: One end of the inductive reading head is fixedly connected to the guard plate, and the other end is coupled to the inductive component to detect the position of the movable subassembly.

16. A suspension system, characterized in that: The invention comprises an air spring damper according to any one of claims 11 to 15.

17. A vehicle, characterized in that: Comprising a suspension system according to claim 16.

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