Displacement sensor assembly, linear motor, suspension system and vehicle

Abstract

The utility model provides a displacement sensor assembly, a linear motor, a suspension system and a vehicle, the displacement sensor assembly comprises a stator component, and the stator component comprises a coil; one end of the rotor part is provided with a metal section to be detected, the metal section to be detected can move relative to the coil, and the other end of the rotor part is suitable for being connected with a rotor assembly of the linear motor; the stator component is suitable for being connected into a stator assembly of the linear motor so as to measure the moving distance of the mover assembly when the mover assembly moves relative to the stator assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and specifically relates to a displacement sensor component, a linear motor, a suspension system and a vehicle. Background Art

[0002] A linear motor is a transmission device that converts electrical energy directly into linear motion mechanical energy without the need for any intermediate conversion mechanism.

[0003] When the mover of a linear motor moves relative to the stator, the movement of the mover needs to be accurately measured. To facilitate measurement, existing sensors for measuring the movement of the mover are generally set inside the motor. However, due to the influence of the motor magnetic field on the sensor measurement, the measurement accuracy of the mover movement is low. Utility Model Content

[0004] One object of the utility model is to provide a new technical solution for a displacement sensor assembly, a linear motor, a suspension system and a vehicle.

[0005] According to a first aspect of the present utility model, a displacement sensor assembly is provided, comprising:

[0006] a stator component, the stator component comprising a coil;

[0007] A mover component, one end of which is provided with a metal section to be measured, the metal section to be measured being movable relative to the coil, and the other end of which is suitable for connecting to a mover assembly of a linear motor;

[0008] The stator component is suitable for being connected to a stator assembly of the linear motor so as to measure a moving distance of the moving assembly when the moving assembly moves relative to the stator assembly.

[0009] Optionally, the stator component comprises a bracket, a receiving cavity is formed in the bracket, and the bracket is suitable for being connected to a stator assembly of the linear motor;

[0010] The support is tubular, and the accommodating cavity is arranged to penetrate along the axial direction of the support;

[0011] One end of the movable member is movably disposed in the accommodating cavity along the axial direction of the bracket and is kept opposite to the coil.

[0012] Optionally, in an axial direction perpendicular to the stator component, a width dimension of the mover component is greater than a width dimension of the coil.

[0013] Optionally, the stator component includes a circuit board, the circuit board is arranged on the bracket, the coil is arranged on the circuit board, the bracket includes an arc-shaped side wall, a plane side wall and a plurality of support ribs, the arc-shaped side wall and the plane side wall enclose a receiving space, and a plurality of the support ribs are arranged in the receiving space and separate a plurality of sub-spaces;

[0014] One of the subspaces forms the accommodating cavity, and the circuit board is fixed on the plane side wall.

[0015] Optionally, the movable component includes a connecting section, and the circumferential dimension of the metal section to be tested is larger than the circumferential dimension of the connecting section;

[0016] The metal section to be tested is movably arranged in the accommodating cavity, and the connecting section is suitable for being connected to the moving subassembly of the linear motor through a rotating bearing.

[0017] Optionally, the accommodating cavity is a square cavity, and the axial interface of the metal section to be tested is a square that matches the square cavity.

[0018] Optionally, a slide groove is formed on the inner wall of the accommodating cavity, a protrusion is provided on the metal section to be tested, and the protrusion is slidably arranged in the slide groove along the moving direction of the movable component.

[0019] Optionally, a housing is further included, and the stator component is arranged in the housing and can be fixed in the stator assembly of the linear motor through the housing.

[0020] According to a second aspect of the utility model, a linear motor is provided, comprising a stator assembly, a mover assembly and the displacement sensor assembly described in the first aspect;

[0021] The stator component is fixed in the stator assembly, and the mover component is connected to the mover assembly.

[0022] Optionally, the stator assembly comprises a stator core shaft and a motor stator, a cavity is formed inside the stator core shaft, and the stator component is fixed in the cavity;

[0023] The motor stator is sleeved on the stator core shaft, and the mover assembly is movably connected to the outer periphery of the stator assembly along the axial direction of the stator assembly.

[0024] Optionally, the mover assembly includes a motor mover and a linear bearing, and the motor mover is movably connected to the outer periphery of the stator assembly through the linear bearing.

[0025] Optionally, a rotating bearing is further included, and the mover component is connected to the motor mover via the rotating bearing.

[0026] According to a third aspect of the utility model, there is provided a suspension system, comprising an upper tower top structure, a lower tower top structure and the linear motor described in the second aspect;

[0027] The linear motor is connected between the upper tower top structure and the lower tower top structure.

[0028] According to a fourth aspect of the utility model, a vehicle is provided, comprising the suspension system described in the third aspect.

[0029] A technical effect of the utility model is:

[0030] An embodiment of the present application provides a displacement sensor assembly, which includes a stator component, the stator component includes a coil; a mover component, one end of which is provided with a metal section to be measured, the metal section to be measured can move relative to the coil, and the other end of the mover component is suitable for connecting to a mover assembly of a linear motor; the stator component is suitable for being connected to the stator assembly of the linear motor to measure the moving distance of the mover assembly when the mover assembly moves relative to the stator assembly, thereby ensuring the measurement accuracy of the displacement sensor assembly on the moving distance of the mover assembly.

[0031] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0033] Figure 1 A schematic diagram of a displacement sensor assembly provided by an embodiment of the utility model;

[0034] Figure 2 An internal schematic diagram of a displacement sensor assembly provided by an embodiment of the utility model;

[0035] Figure 3 An axial schematic diagram of a displacement sensor assembly provided by an embodiment of the utility model;

[0036] Figure 4 for Figure 3 Cross-section view of the AA surface;

[0037] Figure 5 An axial schematic diagram of another displacement sensor assembly provided by an embodiment of the utility model;

[0038] Figure 6 A cross-sectional view of a linear motor provided by an embodiment of the utility model;

[0039] Figure 7 A cross-sectional view of a suspension system provided in an embodiment of the utility model.

[0040] in:

[0041] 100. displacement sensor assembly; 1. stator component; 11. bracket; 111. arc-shaped side wall; 112. plane side wall; 113. support rib; 12. circuit board; 121. coil; 122. transmission line; 2. mover component; 21. metal section to be measured; 22. connecting section; 23. protrusion; 3. housing;

[0042] 1000, linear motor; 200, stator assembly; 201, stator core shaft; 202, motor stator; 203, stator slot; 204, heat sleeve ring; 300, mover assembly; 301, linear bearing; 302, motor housing; 303, motor magnet; 304, first elastic retaining ring; 400, rotating bearing; 500, second elastic retaining ring; 600, third elastic retaining ring; 700, cooling pipe; 800, buffer pad;

[0043] 2000, upper tower top structure; 3000, lower tower top structure. DETAILED DESCRIPTION

[0044] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0045] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0046] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0047] In the description of the present application, 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 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 application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] Reference Figures 1 to 5 , an embodiment of the present application provides a displacement sensor assembly, the displacement sensor assembly comprising:

[0051] A stator component 1, the stator component 1 includes a coil 121;

[0052] A mover component 2, one end of which is provided with a metal section to be tested 21, the metal section to be tested 21 can move relative to the coil 121, and the other end of the mover component 2 is suitable for connecting to a mover assembly of the linear motor;

[0053] The stator component 1 is suitable for being connected to a stator assembly of a linear motor to measure a moving distance of the mover assembly when the mover assembly moves relative to the stator assembly.

[0054] In one embodiment, the mover component 2 is connected to the mover assembly of the linear motor through a rotating bearing, and the mover component 2 can move along with the mover assembly of the linear motor when it moves axially, so that the moving distance of the mover assembly of the linear motor can be obtained through the moving distance of the mover component 2.

[0055] Specifically, when the movable part 2 moves with the movable assembly of the linear motor, the metal section to be measured 21 can move relative to the coil 121, so that the magnetic field generated by the coil 121 changes, and the sensing element on the stator part 1 can sense the change in the magnetic field generated by the coil 121, and obtain the distance moved by the metal section to be measured 21 relative to the coil 121 through the change in the magnetic field. The distance moved by the metal section to be measured 21 relative to the coil 121 is equal to the distance moved by the movable assembly relative to the stator assembly, thereby achieving the purpose of measuring the moving distance of the movable assembly when the movable assembly moves relative to the stator assembly.

[0056] The stator component 1 and the mover component 2 of the displacement sensor assembly are both arranged in the linear motor, so that the displacement sensor assembly is prevented from occupying the external space of the linear motor and space is saved.

[0057] In one embodiment, the material of the movable component 2 is a conductive but non-magnetic metal material, so that the movable component 2 forms eddy currents when moving in the magnetic field generated by the coil 121, and the displacement sensor component with the eddy current structure can be unaffected by the magnetic field inside the linear motor, so as to accurately measure the moving distance of the movable component relative to the stator component, thereby improving the measurement accuracy of the moving distance of the movable component.

[0058] The displacement sensor assembly provided in the embodiment of the present application includes a stator component 1, which includes a coil 121; a mover component 2, one end of which is provided with a metal section to be measured 21, and the metal section to be measured 21 can move relative to the coil 121, and the other end of the mover component 2 is suitable for connecting to the mover assembly of the linear motor; the stator component 1 is suitable for being connected to the stator assembly of the linear motor to measure the moving distance of the mover assembly when the mover assembly moves relative to the stator assembly, thereby avoiding the influence of the magnetic field inside the linear motor and ensuring the measurement accuracy of the displacement sensor assembly on the moving distance of the mover assembly.

[0059] In addition, the displacement sensor assembly provided in the embodiment of the present application has a stable structure, can be used as a damper, and can still ensure measurement accuracy under harsh operating conditions such as vibration and high temperature.

[0060] Optionally, the stator component 1 includes a bracket 11, a receiving cavity is formed in the bracket 11, and the bracket 11 is suitable for being connected to a stator assembly of the linear motor;

[0061] See also Figure 2 The support 11 is tubular, and the accommodating cavity is arranged through the axial direction of the support 11;

[0062] One end of the movable member 2 is movably disposed in the accommodating cavity along the axial direction of the bracket 11 and is kept opposite to the coil 121 .

[0063] Specifically, the bracket 11 of the tubular structure can match the axial space inside the stator assembly of the linear motor, ensuring the adaptability of the bracket 11 fixed in the stator assembly of the linear motor.

[0064] One end of the movable component 2 is arranged in the accommodating cavity along the axial direction of the bracket 11, and the bracket 11 can be coaxially arranged with the stator assembly of the linear motor to facilitate the movable component 2 to move along the axial direction of the bracket 11; and the movable component 2 remains relative to the coil 121 during the movement, which can improve the measurement accuracy of the displacement sensor assembly.

[0065] Optionally, in an axial direction perpendicular to the bracket 11 in the stator component 1 , the width dimension of the mover component 2 is greater than the width dimension of the coil 121 .

[0066] Specifically, see Figure 3 , the width dimension of the moving part 2 can be Figure 3 The width of the coil 121 can be Figure 3 When h is greater than h, the sensitivity of the coil 121 to the activity detection of the mover component 2 can be guaranteed, and the accurate measurement of the displacement sensor assembly can be guaranteed.

[0067] Alternatively, see Figure 2 and Figure 3 The stator component 1 includes a circuit board 12, the circuit board 12 is arranged on a bracket 11, the coil 121 is arranged on the circuit board 12, the bracket 11 includes an arcuate side wall 111, a plane side wall 112 and a plurality of support ribs 113, the arcuate side wall 111 and the plane side wall 112 enclose a receiving space, and the plurality of support ribs 113 are arranged in the receiving space and separate a plurality of sub-spaces;

[0068] One subspace forms an accommodating cavity, and the circuit board 12 is fixed on the plane side wall 112 .

[0069] Specifically, when a plurality of support ribs 113 are arranged in the accommodation space enclosed by the arc-shaped side wall 111 and the plane side wall 112 and a plurality of sub-spaces are separated, the lightweight of the bracket 11 can be achieved on the basis of ensuring the structural strength of the bracket 11. The outer surface of the plane side wall 112 can be used to fix the circuit board 12, for example, by fixing the circuit board 12 to the outer surface of the plane side wall 112 with screws, so as to ensure the integrity and structural stability of the circuit board 12 and the bracket 11.

[0070] Specifically, a transmission line 122 is provided on the circuit board 12 so that the circuit board 12 can obtain an electrical signal through the transmission line 122 .

[0071] Furthermore, the arrangement of the bracket 11 allows the circuit board 12 to be spaced apart from the stator assembly of the linear motor. For example, the circuit board 12 and the stator assembly of the linear motor can be spaced apart by more than 10 mm, thereby ensuring the measurement accuracy of the displacement sensor assembly.

[0072] In one embodiment, the accommodating cavity is located at the center of the bracket 11 , so that the mover component 2 is movably arranged at the center of the bracket 11 , so that the mover component 2 is coaxially arranged with the linear motor.

[0073] Alternatively, see Figure 4 , the movable component 2 includes a connecting section 22, and the circumferential dimension of the metal section to be tested 21 is greater than the circumferential dimension of the connecting section 22;

[0074] The metal section to be tested 21 is movably disposed in the accommodating cavity, and the connecting section 22 is suitable for being connected to the moving subassembly of the linear motor through a rotating bearing.

[0075] Specifically, the circumferential dimension can be the outer circumference, that is, the outer circumference of the metal section to be tested 21 is larger than the outer circumference of the connecting section 22; in the axial direction perpendicular to the bracket 11, the width dimension of the metal section to be tested 21 is larger than the width dimension of the coil 121 to ensure the sensitivity of the displacement sensor assembly; and the size of the connecting section 22 is smaller than the size of the metal section to be tested 21, which can realize the miniaturization and lightweight of the movable component 2.

[0076] Optionally, the accommodating cavity is a square cavity, and the axial interface of the metal section to be tested 21 is a square that matches the square cavity.

[0077] Specifically, the metal section to be tested 21 can be a square column, which is assembled in the square cavity and can move axially but not rotate circumferentially, thereby avoiding the deflection of the movable component 2 driven by the movable component of the linear motor, thereby ensuring the measurement accuracy of the displacement sensor assembly; and the connecting section 22 can be a cylinder, and the diameter of the connecting section 22 is smaller than the short side length of the square column, so as to facilitate the connection of the connecting section 22 with the movable component of the linear motor through a rotating bearing on the basis of reducing the weight of the movable component 2.

[0078] Alternatively, see Figure 5 The inner wall of the accommodating cavity forms a slide groove, and a protrusion 23 is provided on the metal section to be tested 21, and the protrusion 23 is slidably arranged in the slide groove along the moving direction of the movable component 2.

[0079] Specifically, the protrusion 23 can prevent the mover component 2 from deflecting relative to the bracket 11 on the basis of further reducing the size of the mover component 2, thereby ensuring the measurement accuracy of the displacement sensor assembly.

[0080] The protrusion 23 slidably cooperates with the slide groove in the axial direction, which can facilitate the mover assembly of the linear motor to drive the mover component 2 to move axially, thereby ensuring the synchronization of the axial movement of the mover component 2 and the mover assembly of the linear motor.

[0081] Alternatively, see Figures 3 to 5 The displacement sensor assembly also includes a housing 3 , and the stator component 1 is disposed in the housing 3 and can be fixed in the stator assembly of the linear motor through the housing 3 .

[0082] Specifically, the shell 3 can be a round tube, and the grid structure formed by the bracket 11 abuts against the inner wall of the shell 3, while the outer wall of the shell 3 can abut against the internal cavity of the stator assembly of the linear motor to ensure the stability of the stator component 1 set in the stator assembly of the linear motor.

[0083] See also Figure 6 , the embodiment of the present application provides a linear motor, the linear motor includes a stator assembly 200, a mover assembly 300 and a displacement sensor assembly 100;

[0084] The stator component 1 is fixed in the stator assembly 200 , and the mover component 2 is connected to the mover assembly 300 .

[0085] Specifically, in the displacement sensor assembly 100 of the linear motor, the displacement sensor assembly 100 includes a stator component 1, the stator component 1 includes a bracket 11 and a circuit board 12, the bracket 11 forms a receiving cavity, the circuit board 12 is provided with a coil 121, the circuit board 12 is fixed on the bracket 11, and the bracket 11 is suitable for being fixed in the stator assembly 200 of the linear motor; a mover component 2, one end of the mover component 2 is movably arranged in the receiving cavity, and the other end of the mover component 2 is suitable for connecting to the mover assembly 300 of the linear motor; the mover component 2 cooperates with the coil 121 to measure the moving distance of the mover assembly 300 relative to the stator assembly 200, avoiding the influence of the magnetic field inside the linear motor, and ensuring the measurement accuracy of the displacement sensor assembly on the moving distance of the mover assembly 300, so as to judge the real-time position of the linear motor.

[0086] Alternatively, see Figure 6 The stator assembly 200 includes a stator core shaft 201 and a motor stator 202. A cavity is formed inside the stator core shaft 201, and the stator component 1 is fixed in the cavity;

[0087] The motor stator 202 is sleeved on the stator core shaft 201 , and the mover assembly 300 is movably connected to the outer periphery of the stator assembly 200 along the axial direction of the stator assembly 200 .

[0088] Specifically, the mover assembly 300 is connected to the outer periphery of the stator assembly 200 and can move along the axial direction of the stator assembly 200 to drive the load to move linearly or to adjust the system damping.

[0089] In one embodiment, see Figure 6 A plurality of stator slots 203 are provided on the motor stator 202 , and the stator assembly 200 includes a heat sleeve ring 204 , which is connected to the outer periphery of the stator core shaft 201 and stops at the end of the motor stator 202 to limit the axial displacement of the motor stator 202 .

[0090] Alternatively, see Figure 6 The mover assembly 300 includes a motor mover and a linear bearing 301 , and the motor mover is movably connected to the outer periphery of the stator assembly 200 through the linear bearing 301 .

[0091] Specifically, the inner ring of the linear bearing 301 is fixed to the outer periphery of the motor stator 202, and the outer ring of the linear bearing 301 is connected to the motor mover to achieve flexible axial movement of the motor mover relative to the motor stator 202 while ensuring the stability of the connection between the motor mover and the motor stator 202.

[0092] In one embodiment, see Figure 6 The motor mover includes a motor housing 302, a motor magnet 303 and a first elastic retaining ring 304. The motor housing 302 is connected to the outer periphery of the motor stator 202 through a linear bearing 301, and a receiving gap is formed between the motor housing 302 and the outer periphery of the motor stator 202. The motor magnet 303 is located in the receiving gap, and the first elastic retaining ring 304 is arranged at the end of the inner ring of the linear bearing 301 to ensure the stability of the inner ring of the linear bearing 301 fixed to the outer periphery of the motor stator 202.

[0093] Optionally, the linear motor further includes a rotating bearing 400 , and the mover component 2 is connected to the motor mover via the rotating bearing 400 .

[0094] Specifically, when the linear motor is used in the suspension system of a vehicle and other fields, since the suspension system is connected to the vehicle body through components such as springs, during the compression and extension of the springs, the motor stator and the motor mover of the linear motor will rotate relative to each other accordingly; and the mover component 2 is connected to the motor mover through a rotating bearing 400, which can prevent the rotation of the motor mover from being transmitted to the mover component 2, thereby ensuring the measurement accuracy of the displacement sensor assembly.

[0095] In one embodiment, see Figure 6 The linear motor also includes a second elastic retaining ring 500, a third elastic retaining ring 600 and a cooling pipe 700. The second elastic retaining ring 500 is arranged at the end of the rotating bearing 400 to form a block for the rotating bearing 400, and the movable component 2 extends out of the rotating bearing 400 and is embedded in the groove of the motor housing 302, thereby ensuring the stability of the setting position of the movable component 2.

[0096] The third elastic retaining ring 600 is arranged at the end of the bracket 11 to block the bracket 11 and prevent the bracket 11 from axial movement in the stator assembly 200; the cooling pipe 700 is used to cool the linear motor, and a buffer pad 800 is arranged in the mover assembly 300 to form a buffer between the mover component and the motor housing 302.

[0097] See also Figure 7 , the embodiment of the present application provides a suspension system, the suspension system includes an upper tower top structure 2000, a lower tower top structure 3000 and a linear motor 1000;

[0098] The linear motor 1000 is connected between the upper tower top structure 2000 and the lower tower top structure 3000 .

[0099] Specifically, the upper tower top structure 2000 can be fixedly connected to the vehicle body by bolts, the lower tower top structure 3000 is connected to the fork arm, and the linear motor 1000 is connected between the upper tower top structure 2000 and the lower tower top structure 3000 to actively adjust the damping of the suspension system and improve the stability of the vehicle.

[0100] An embodiment of the present application provides a vehicle, which includes a suspension system.

[0101] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A displacement sensor assembly, characterized in that: include: A stator component (1), the stator component comprising a coil (121); A mover component (2), one end of the mover component (2) being provided with a metal section to be measured (21), the metal section to be measured (21) being movable relative to the coil (121), and the other end of the mover component (2) being suitable for connecting to a mover assembly of a linear motor; The stator component (1) is suitable for being connected to a stator assembly of a linear motor so as to measure the moving distance of the moving assembly when the moving assembly moves relative to the stator assembly.

2. The displacement sensor assembly according to claim 1, characterized in that: The stator component (1) comprises a bracket (11), a receiving cavity is formed in the bracket (11), and the bracket (11) is suitable for being connected to a stator assembly of a linear motor; The support (11) is tubular, and the accommodating cavity is arranged to penetrate along the axial direction of the support (11); One end of the movable component (2) is movably disposed in the accommodating cavity along the axial direction of the bracket (11) and is maintained opposite to the coil (121).

3. The displacement sensor assembly according to claim 1 or 2, characterized in that: In an axial direction perpendicular to the stator component (1), the width dimension of the mover component (2) is greater than the width dimension of the coil (121).

4. The displacement sensor assembly according to claim 2, characterized in that: The stator component (1) comprises a circuit board (12), the circuit board (12) is arranged on the bracket (11), the coil (121) is arranged on the circuit board (12), the bracket (11) comprises an arc-shaped side wall (111), a plane side wall (112) and a plurality of support ribs (113), the arc-shaped side wall (111) and the plane side wall (112) enclose a receiving space, and a plurality of support ribs (113) are arranged in the receiving space to separate a plurality of subspaces; One of the subspaces forms the accommodating cavity, and the circuit board (12) is fixed on the plane side wall (112).

5. The displacement sensor assembly according to claim 2 or 4, characterized in that: The movable component (2) comprises a connecting section (22), and the circumferential dimension of the metal section to be tested (21) is greater than the circumferential dimension of the connecting section (22); The metal section to be tested (21) is movably arranged in the accommodating cavity, and the connecting section (22) is suitable for being connected to a moving subassembly of a linear motor via a rotating bearing.

6. The displacement sensor assembly according to claim 2 or 4, characterized in that: The accommodating cavity is a square cavity, and the axial interface of the metal section to be tested (21) is a square that matches the square cavity.

7. The displacement sensor assembly according to claim 2 or 4, characterized in that: The inner wall of the accommodating cavity forms a slide groove, the metal section to be tested (21) is provided with a protrusion (23), and the protrusion (23) is slidably arranged in the slide groove along the moving direction of the movable component (2).

8. The displacement sensor assembly according to claim 1, characterized in that: It also comprises a housing (3), wherein the stator component (1) is arranged in the housing (3) and can be fixed in a stator assembly of the linear motor through the housing (3).

9. A linear motor, characterized in that: It comprises a stator assembly (200), a mover assembly (300) and a displacement sensor assembly (100) according to any one of claims 1 to 8; The stator component (1) is fixed in the stator assembly (200), and the mover component (2) is connected to the mover assembly (300).

10. The linear motor according to claim 9, characterized in that: The stator assembly (200) comprises a stator core shaft (201) and a motor stator (202); a cavity is formed inside the stator core shaft (201), and the stator component (1) is fixed in the cavity; The motor stator (202) is sleeved on the stator core shaft (201), and the mover assembly (300) is movably connected to the outer periphery of the stator assembly (200) along the axial direction of the stator assembly (200).

11. The linear motor according to claim 10, characterized in that: The mover assembly (300) comprises a motor mover and a linear bearing (301), and the motor mover is movably connected to the outer periphery of the stator assembly (200) via the linear bearing (301).

12. The linear motor according to claim 11, characterized in that: It also comprises a rotating bearing (400), and the mover component (2) is connected to the motor mover via the rotating bearing (400).

13. A suspension system, characterized in that: It comprises an upper tower top structure (2000), a lower tower top structure (3000) and a linear motor (1000) as claimed in any one of claims 9 to 12; The linear motor (1000) is connected between the upper tower top structure (2000) and the lower tower top structure (3000).

14. A vehicle, characterized in that: Comprising the suspension system of claim 13.

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