Grid ruler assembly, displacement sensor, center piece, center piece assembly, stator assembly, actuator, suspension system and vehicle

Abstract

The utility model discloses a grating ruler assembly, a displacement sensor, a center piece, a center piece assembly, a stator assembly, an actuator, a suspension system and a vehicle, relates to the technical field of vehicles, and aims to solve the problem that the connection stability of a grating ruler and a target device is poor. The grating ruler assembly is applied to the displacement sensor and comprises a back plate and a grating ruler, and the grating ruler is connected to the back plate and suitable for being installed on a target device through the back plate.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a grating scale assembly, a displacement sensor, a center piece, a center piece assembly, a stator assembly, an actuator, a suspension system and a vehicle. Background Art

[0002] A grating scale type displacement sensor generally includes a grating scale and a reading head. By respectively installing the grating scale and the reading head on two relatively moving components in a target device, the relative displacement of the two relatively moving components in the target device can be detected by detecting the signal change on the grating scale through the reading head.

[0003] However, in the related art, the grating scale is usually directly connected to the target device, and the connection between the grating scale and the target device is unstable, prone to deviation, thus affecting the detection accuracy of the displacement sensor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a grating scale assembly, a displacement sensor, a center piece, a center piece assembly, a stator assembly, an actuator, a suspension system and a vehicle, aiming to solve the problem of how to improve the connection stability between the grating scale and the target device.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect of the utility model, a grating scale assembly is provided, which is applied to a displacement sensor. The grating scale assembly includes a back plate and a grating scale. The grating scale is connected to the back plate and is adapted to be installed on a target device through the back plate.

[0007] The grating scale assembly provided by the embodiment of the present application realizes the installation of the grating scale on the target device by connecting the grating scale to the back plate and then installing it on the target device through the back plate. The back plate can fix and support the grating scale, thereby improving the connection strength of the grating scale to ensure the connection stability between the grating scale and the target device, and further ensuring the detection accuracy of the displacement sensor.

[0008] In some embodiments, the grating scale is bonded to the back plate.

[0009] In some embodiments, the orthographic projection of the grating scale on a first plane is an arc structure, and the arc structure arches in the direction away from the back plate, where the first plane is parallel to the arrangement direction of the back plate and the grating scale.

[0010] In some embodiments, the orthographic projection of the surface of the back plate facing the grating scale on the first plane is a first arc structure matching the arc structure and is connected to the grating scale. In this way, the grating scale and the back plate can be better fitted to improve the connection effect between the grating scale and the back plate.

[0011] In some embodiments, the orthographic projection of the backplane's surface facing away from the grating scale on the first plane is a straight-line structure and is adapted to be connected to the target device. In this way, the backplane can fit well with the target device, improving the connection effect between the backplane and the target device.

[0012] In some embodiments, the backplane includes a main body portion, a first protrusion portion, and a second protrusion portion. The first protrusion portion and the second protrusion portion are respectively connected to two ends of the main body portion in the first direction, where the first direction is perpendicular to the arrangement direction of the backplane and the grating scale.

[0013] In some embodiments, the grating scale is a magnetic grating scale.

[0014] In some embodiments, the number of magnetic grating scales is multiple, and the multiple magnetic grating scales are arranged in the second direction, where the second direction is perpendicular to the arrangement direction of the backplane and the grating scale.

[0015] In some embodiments, the magnetic grating scale includes multiple first magnetic poles and multiple second magnetic poles, and the multiple first magnetic poles and the multiple second magnetic poles are alternately arranged in the third direction, where the third direction is perpendicular to the arrangement direction of the backplane and the grating scale and perpendicular to the second direction; along the third direction, the sizes of the first magnetic poles and the second magnetic poles are the same.

[0016] In some embodiments, along the third direction, the sizes of the first magnetic poles of different magnetic grating scales are different.

[0017] In a second aspect of the present application, a displacement sensor is provided. The displacement sensor includes a reading head and a grating scale assembly. The target device includes a first component and a second component that can move relative to each other. One of the grating scale assembly and the reading head is adapted to be installed on the first component, and the other of the grating scale assembly and the reading head is adapted to be installed on the second component; the reading head is located on the side of the grating scale facing away from the backplane, and the sensing surface of the reading head faces the grating scale.

[0018] In some embodiments, the orthographic projection of the grating scale on the first plane is an arc-shaped structure, and the arc-shaped structure arches in the direction away from the backplane, where the first plane is parallel to the arrangement direction of the backplane and the grating scale; the orthographic projection of the sensing surface on the first plane is a second arc-shaped structure, and the second arc-shaped structure is recessed in the direction away from the grating scale by the reading head. By setting the sensing surface of the reading head as an arc surface, when the central member body rotates relative to the cylinder, there will be a part of the sensing surface of the reading head with a relatively small change in distance from the grating scale, so that the magnetic field intensity of the grating scale can be detected more accurately.

[0019] In some embodiments, the grating scale is a magnetic grating scale; the reading head is a magnetic head.

[0020] In some embodiments, the number of magnetic grating scales is multiple, and the multiple magnetic grating scales are arranged in the second direction, where the second direction is perpendicular to the arrangement direction of the backplane and the grating scale; the sensing surface includes multiple sensing regions, and one sensing region faces one magnetic grating scale.

[0021] In some embodiments, the number of grating scale components is multiple, and the multiple grating scale components are arranged around the direction in which the first component and the second component move relative to each other; the number of read heads is multiple, and one read head corresponds to one grating scale component.

[0022] In some embodiments, the distance between the sensing surface of the magnetic head and the surface of the magnetic grating scale facing the magnetic head is greater than or equal to 5 mm and less than or equal to 7 mm. In this way, it can not only ensure that the magnetic head can effectively detect the magnetic field strength of the magnetic grating scale, but also make a relatively large distance between the magnetic head and the magnetic grating scale, so as to facilitate the setting of a protective member between the magnetic head and the magnetic grating scale to protect the magnetic grating scale.

[0023] In the third aspect of the present application, a central member is provided. The central member includes a central member body, and the central member body is provided with a mounting groove, and the mounting groove is adapted to be provided with a grating scale component. The mounting groove can limit the grating scale component to prevent the grating scale component from shifting downward or falling off under its own gravity, so that the grating scale component can be more stably connected to the central member body.

[0024] In some embodiments, at least a part of the back plate is in interference fit with the inner wall surface of the mounting groove.

[0025] In some embodiments, the back plate includes a main body portion, a first convex portion and a second convex portion. The first convex portion and the second convex portion are respectively connected to both ends of the main body portion in a first direction, wherein the first direction is perpendicular to the arrangement direction of the back plate and the grating scale; there is an interference fit between the first convex portion and the inner wall surface of the mounting groove, and between the second convex portion and the inner wall surface of the mounting groove. In this way, a part of the back plate can be in interference fit with the inner wall surface of the mounting groove. After the back plate is installed in the mounting groove, only a part of the back plate is subjected to the extrusion force of the inner wall surface of the mounting groove, so that the extrusion force received by the back plate can be reduced to avoid deformation and damage of the back plate.

[0026] In some embodiments, the central member body includes a central portion and a sleeve portion. The central portion is provided with a mounting groove; the sleeve portion surrounds the central portion, and the mounting groove is recessed from the surface of the central portion facing the sleeve portion towards the direction away from the sleeve portion, and the grating scale is located in the area surrounded by the sleeve. In this way, the grating scale can be protected by the sleeve portion to prevent the grating scale from being worn due to friction with other components when the central member body and the cylinder move relative to each other, so as to improve the service life of the grating scale and ensure the working performance of the grating scale.

[0027] In the fourth aspect of the present application, a central member assembly is provided. The central member assembly includes a grating scale component and a central member, and the target device includes a central member body.

[0028] In some embodiments, the central member body has an outer peripheral surface, and the grating scale is connected to the surface of the back plate facing the outer peripheral surface.

[0029] In some embodiments, the central member assembly further includes a fixing member located on one side of the grating ruler facing the outer peripheral surface and covering the surface of the grating ruler facing the outer peripheral surface. The fixing member can prevent impurities from entering the installation groove, thereby avoiding the influence of impurities on the performance of the grating ruler.

[0030] In a fifth aspect of the present application, a stator assembly is provided. The stator assembly includes a central member assembly and a magnetic assembly, and the magnetic assembly is sleeved on the central member body.

[0031] In some embodiments, the magnetic assembly includes an iron core and a coil. The iron core is connected to the central member body, and a coil groove is formed on the iron core; the coil is accommodated in the coil groove.

[0032] In some embodiments, the central member body includes a first rod section and a second rod section. The magnetic assembly is connected to the first rod section, and the grating ruler assembly is connected to the second rod section.

[0033] In a sixth aspect of the present application, an actuator is provided. The actuator includes a stator assembly and a mover assembly. The mover assembly is sleeved on the outer peripheral side of the stator assembly, and the mover assembly can move axially relative to the stator assembly along the actuator.

[0034] In some embodiments, the mover assembly includes a cylinder body and a magnetic member. The cylinder body includes mounting holes provided along its circumferential direction, and the mounting holes communicate with the inner space of the cylinder body; the central member body passes through the mounting holes, and the magnetic assembly is located inside the cylinder body; the magnetic member is fixedly arranged on the inner peripheral side of the cylinder body and is located between the cylinder body and the magnetic assembly.

[0035] In some embodiments, the actuator further includes a displacement sensor. The grating ruler assembly is connected to the central member body, the reading head is connected to the cylinder body, and the sensing surface of the reading head faces the grating ruler.

[0036] In some embodiments, the reading head is provided on the surface of the cylinder body that cooperates with the central member body. In this way, the reading head can be prevented from being in a high-temperature environment, thereby avoiding the influence of the too high temperature of the reading head on its working performance.

[0037] In some embodiments, the actuator further includes a sealing ring provided between the inner wall surface of the mounting hole around one week and the central member body. The sealing ring can seal the gap between the inner wall surface of the mounting hole and the central member body to prevent external impurities from entering the cylinder body, thereby affecting the components inside the cylinder body and ensuring the working performance of the components inside the cylinder body.

[0038] In a seventh aspect of the present application, a suspension system is provided. The suspension system includes an actuator, a fork arm, and a top cover. The fork arm is connected to the mover assembly; the top cover is connected to the stator assembly.

[0039] In some embodiments, the suspension system further includes a lower support and an elastic element. The lower support is fixedly arranged on the mover assembly, and the elastic element is arranged between the lower support and the top cover.

[0040] In an eighth aspect of the present application, a vehicle is provided. The vehicle includes a suspension system, a vehicle body, and wheels. The vehicle body is connected to one of the fork arms and the top cover, and the wheels are arranged below the vehicle body and connected to the other of the fork arms and the top cover.

[0041] In a ninth aspect of the present application, a vehicle is provided. The vehicle includes a displacement sensor, the first component is a mover assembly, and the second component is a stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 It is a schematic structural diagram of the vehicle in the embodiment of the present application;

[0044] Figure 2 For Figure 1 It is a three-dimensional structural diagram of the suspension system in the shown vehicle;

[0045] Figure 3 For Figure 2 It is a partial structural diagram of the shown suspension system;

[0046] Figure 4 For Figure 3 It is a front view of the partial structure of the shown suspension system;

[0047] Figure 5 For Figure 4 It is a schematic cross-sectional structure diagram of the E-E section in

[0048] Figure 6 For Figure 5 It is an enlarged schematic diagram of the structure at A in

[0049] Figure 7 For Figure 3 It is a schematic structural diagram of the central component assembly of the actuator in the shown suspension system;

[0050] Figure 8 For Figure 7 It is a top view structural diagram of the central component assembly in

[0051] Figure 9 For Figure 5 It is an enlarged schematic diagram of the structure at B in

[0052] Figure 10 is Figure 7 a schematic view of the structure when the sleeve part of the central component assembly is removed and the fixing part does not cover the grating scale;

[0053] Figure 11 is a schematic view of the relationship between the magnetic head and the magnetic grating scale in the embodiment of the present application;

[0054] Figure 12 is Figure 11 a top view schematic of the relationship between the magnetic head and the magnetic grating scale;

[0055] Figure 13 is Figure 7 a schematic view of the F - F cross - section;

[0056] Figure 14 is Figure 7 a schematic view of the structure when a part of the sleeve part of the central component assembly is cut off and the sealing part does not cover the grating scale;

[0057] Figure 15 is Figure 14 a schematic view of the enlarged structure at C;

[0058] Figure 16 is a schematic view of the connection relationship between the grating scale and the back plate in the embodiment of the present application.

[0059] Reference numerals:

[0060] 1000, vehicle;

[0061] 1, vehicle body;

[0062] 2, wheel;

[0063] 3, suspension system; 31, actuator; 31A, stator assembly; 31B, mover assembly; 311, central component; 311A, central component body; 311B, limiting part; 311C, grating scale; 311D, magnetic grating scale; 311G, outer peripheral surface; 311E, first magnetic pole; 311F, second magnetic pole; 311M, central part; 311N, sleeve part; 311P, mounting groove; 311Q, back plate; 311R, main body part; 311S, first convex part; 311T, second convex part; 311U, fixing part;

[0064] 312, cylinder body; 3121, lower support; 3122, top wall; 3122A, mounting hole; 3123, bottom wall; 3124, circumferential wall plate; 3131, coil; 3132, magnetic part; 3133, iron core; 314, sealing ring; 315, reading head; 315A, magnetic head; 315B, induction surface;

[0065] 32, fork arm; 33, top cover; 34, elastic element; 35, support part. Detailed implementation mode

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.

[0067] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0068] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", and "communicated" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0069] In the embodiments of the present utility model, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the process, article or device including the element.

[0070] In the embodiments of the present utility model, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present utility model should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0071] In the description of this specification, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0072] The present application provides a vehicle 1000. The vehicle 1000 can be a pure electric vehicle, a fuel-electric hybrid vehicle, a plug-in hybrid vehicle, an extended-range electric vehicle, a fuel vehicle, etc. The vehicle 1000 can also be a sedan, a freight vehicle, a passenger vehicle, a truck, a trailer, etc.

[0073] As Figure 1 shown, Figure 1 This is a schematic structural diagram of the vehicle 1000 in an embodiment of the present application. The vehicle 1000 includes a body 1 and wheels 2. The body 1 is for passengers to ride in and carry items, and the wheels 2 are installed below the body 1, for carrying the body 1 and capable of rolling on the road surface so that the vehicle 1000 can travel.

[0074] The vehicle 1000 further includes a suspension system 3. The suspension system 3 is provided between the body 1 and the wheels 2, for transmitting force and torque between the body 1 and the wheels 2, and buffering the impact force received by the body 1 during the driving of the vehicle 1000, so as to improve the riding or driving comfort.

[0075] Among them, the suspension system 3 can be a non-independent suspension system, an independent suspension system or an active suspension system.

[0076] In some embodiments of the present application, the suspension system 3 is an active suspension system 3. The stiffness and damping characteristics of the active suspension system 3 can be dynamically and adaptively adjusted according to the driving conditions of the vehicle 1000 (such as the motion state of the vehicle 1000 and the road surface conditions, etc.), so that the suspension system 3 is always in the best shock-absorbing state. Specifically, as Figure 2 shown, Figure 2 This is Figure 1 a three-dimensional structural diagram of the suspension system 3 in the vehicle 1000 shown. The suspension system 3 can include an actuator 31, a fork arm 32 and a top cover 33. The fork arm 32 and the top cover 33 are respectively connected to opposite ends of the actuator 31. The actuator 31 is used to drive the fork arm 32 and the top cover 33 to move away from or close to each other, so as to adjust the relative displacement between the top cover 33 and the fork arm 32.

[0077] One of the fork arm 32 and the top cover 33 is connected to the body 1, and the other of the fork arm 32 and the top cover 33 is connected to the wheel 2. That is, if the fork arm 32 is connected to the body 1, then the top cover 33 is connected to the wheel 2; if the fork arm 32 is connected to the wheel 2, then the top cover 33 is connected to the body 1.

[0078] In this way, by adjusting the relative displacement between the top cover 33 and the fork arm 32 through the actuator 31, the relative displacement between the body 1 and the wheel 2 can be adjusted. Thus, when encountering a rough road or turning, the distance between the body 1 and the wheel 2 can be adjusted through the actuator 31 to keep the body 1 balanced and improve the riding comfort of the vehicle 1000.

[0079] As shown Figure 2 in FIG. Figure 2 , the suspension system 3 further includes a lower support 3121 and an elastic element 34. The elastic element 34 is connected between the actuator 31 and the top cover 33. When the actuator 31 adjusts the relative displacement between the top cover 33 and the fork arm 32, the elastic element 34 will expand and contract as the relative movement between the top cover 33 and the fork arm 32 occurs, so that the buffering performance of the elastic element 34 can be adjusted to meet the buffering requirements of the vehicle 1000, thereby further improving the ride comfort of the vehicle 1000.

[0080] Specifically, in some embodiments, as shown Figure 3 in FIG. Figure 3 . Figure 3 FIG. Figure 3 Figure 2 is a partial structural schematic diagram of the suspension system 3 shown in FIG. Figure 2 . The actuator 31 includes a stator assembly 31A and a mover assembly 31B. The mover assembly 31B is sleeved on the outer periphery of the stator assembly 31A, and the mover assembly 31B can move axially relative to the stator assembly 31A along the actuator 31. Among them, the fork arm 32 is connected to the mover assembly 31B, and the top cover 33 is connected to the stator assembly 31A. By the axial movement of the mover assembly 31B relative to the stator assembly 31A along the actuator 31, the relative movement between the fork arm 32 and the top cover 33 along the actuator 31 can be driven, so as to adjust the relative displacement between the vehicle body 1 and the wheel 2, as well as the buffering performance of the elastic element 34.

[0081] Among them, the mover assembly 31B includes a cylinder body 312. The stator assembly 31A includes a central component assembly 31C. The central component assembly 31C includes a central component 311.

[0082] As shown Figure 4 and Figure 5 in FIG. Figure 5 . Figure 4 FIG. Figure 4 Figure 3 is a front view of a partial structure of the suspension system 3 shown in FIG. Figure 3 . Figure 5 FIG. Figure 5 Figure 4 is a schematic cross-sectional structure diagram of the E-E section in FIG. Figure 4 . A part of the central component 311 is located inside the cylinder body 312 and can slide axially relative to the cylinder body 312. Among them, the central component 311 can be a rod-shaped structure, a plate-shaped structure or other irregular structures, etc., which are not specifically limited herein.

[0083] As shown Figure 3 in FIG. Figure 3 and combined with FIG. Figure 2 , Figure 2 the top cover 33 is connected to the central component 311. Specifically, the top cover 33 is connected to the part of the central component 311 located outside the cylinder body 312. The top cover 33 and the central component 311 can be connected by welding, clamping, screwing, etc., or can be connected through other components, which are not specifically limited herein.

[0084] The fork arm 32 is connected to the cylinder body 312. Specifically, the fork arm 32 is connected to one end of the cylinder body 312 facing away from the top cover 33. The fork arm 32 and the cylinder body 312 can be connected by welding, clamping, screwing or other means, or can be connected through other components, which is not specifically limited herein.

[0085] Through the relative sliding of the cylinder body 312 and the central member 311, the relative movement of the top cover 33 and the fork arm 32 can be driven, so as to adjust the relative displacement between the top cover 33 and the fork arm 32, and further adjust the distance between the vehicle body 1 and the wheel 2.

[0086] The elastic element 34 is arranged between the cylinder body 312 and the top cover 33. Specifically, the elastic element 34 abuts against the cylinder body 312 and the top cover 33 respectively, that is, the elastic element 34 is in a compressed state under the clamping of the cylinder body 312 and the top cover 33. Among them, the elastic element 34 can be connected to the cylinder body 312 and the top cover 33, or can be not connected.

[0087] When the cylinder body 312 and the central member 311 slide relatively, the cylinder body 312 and the top cover 33 will also move relatively, so as to drive the elastic element 34 to expand and contract, and adjust the buffering performance of the elastic element 34.

[0088] In some examples, as Figure 3 shown, the suspension system 3 further includes a lower support 3121. The lower support 3121 is fixedly arranged on the mover assembly 31B. Specifically, the lower support 3121 is fixed on the outer peripheral wall surface of the cylinder body 312. Exemplarily, the lower support 3121 can be a support step, or can be a plurality of support protrusions arranged at intervals along the circumference of the cylinder body 312.

[0089] As Figure 2 shown, the suspension system 3 further includes a support member 35. The support member 35 is located on the side of the top cover 33 facing the cylinder body 312 and is connected to the top cover 33. Specifically, the support member 35 can abut against the top cover 33, or can be connected to the top cover 33 by clamping, screwing or other means. Exemplarily, the support member 35 is annular, and the central member 311 passes through the support member 35.

[0090] The elastic element 34 is arranged between the support member 35 and the lower support 3121. Specifically, the elastic element 34 abuts against the support member 35 and the lower support 3121 respectively. Exemplarily, the elastic element 34 can be a cylindrical elastic element 34 made of elastic materials such as rubber material and latex material. At this time, the elastic element 34 can be sleeved on the outside of the cylinder body 312. The elastic element 34 can also include a plurality of elastic columns made of elastic materials such as rubber material and latex material. At this time, the plurality of elastic columns are arranged at intervals along the circumference of the cylinder body 312. Exemplarily, the elastic element 34 can be a spring, and the spring is sleeved on the outside of the cylinder body 312.

[0091] The specific structure of the actuator 31 will be described in detail below.

[0092] In some embodiments, as Figure 5 and Figure 6 shown, Figure 6 is Figure 5 an enlarged schematic view of the structure at position A in . For the convenience of the relative sliding between the cylinder 312 and the central member 311, the mover assembly 31B of the actuator 31 includes the cylinder 312 and the magnetic member 3132. The stator assembly 31A includes the central member assembly 31C and the magnetic assembly 31D. In some other examples, the mover assembly 31B may also include the central member assembly 31C and the magnetic assembly 31D. The stator assembly includes the cylinder 312 and the magnetic member 3132.

[0093] In this application, the mover assembly 31B includes the cylinder 312 and the magnetic member 3132, and the stator assembly 31A includes the central member assembly 31C and the magnetic assembly 31D for exemplary illustration.

[0094] The central member 311 of the central member assembly 31C includes a central member body 311A. The magnetic assembly 31D is sleeved on the central member body 311A. The magnetic member 3132 is fixedly arranged on the inner peripheral side of the cylinder 312, and the magnetic member 3132 is located between the cylinder 312 and the magnetic assembly 31D.

[0095] Specifically, the cylinder 312 includes mounting holes 3122A arranged along its circumferential direction. The mounting holes 3122A communicate with the internal space of the cylinder 312. In some examples, as Figure 4 shown, the cylinder 312 includes a top wall 3122, a bottom wall 3123, and a circumferential wall plate 3124. The top wall 3122 and the bottom wall 3123 are spaced apart, and the thickness directions of the top wall 3122 and the bottom wall 3123 are the same. The circumferential wall plate 3124 is cylindrical and is arranged between the top wall 3122 and the bottom wall 3123. The top wall 3122, the bottom wall 3123, and the circumferential wall plate 3124 enclose the internal space of the cylinder 312. The top wall 3122 is provided with the mounting holes 3122A. The mounting holes 3122A communicate with the internal space of the cylinder 312.

[0096] The central member body 311A passes through the mounting holes 3122A, and the magnetic assembly 31D is located inside the cylinder 312. In some examples, the central member body 311A includes a first rod segment and a second rod segment. The first rod segment is located in the internal space of the cylinder 312, and the second rod segment is located outside the cylinder 312. The magnetic assembly 31D is connected to the first rod segment. In this way, the magnetic assembly 31D is located inside the cylinder 312. The second rod segment can be connected to the top cover 33.

[0097] The magnetic component 31D includes an iron core 3133 and a coil 3131. The iron core 3133 is connected to the central member body 311A. Exemplarily, the iron core 3133 is connected to the first rod segment of the central member body 311A. A coil groove is formed on the iron core 3133; the coil 3131 is received in the coil groove.

[0098] Specifically, the central member body 311A is a rod-shaped structure, and the iron core 3133 is provided on the outer peripheral wall surface of the central member body 311A. The iron core 3133 is annular, the central member body 311A passes through the iron core 3133, and is fixedly connected to the iron core 3133. A coil groove is provided on the outer peripheral wall surface of the iron core 3133, the coil 3131 is disposed in the coil groove, and is wound around the iron core 3133 along the circumferential direction of the iron core 3133.

[0099] The magnetic member 3132 is fixed on the inner wall surface of the cylinder 312. In this way, after the coil 3131 is energized, a magnetic field will be generated between the coil 3131 and the magnetic member 3132, and the direction of the Lorentz force of this magnetic field is along the axial direction of the cylinder 312, so that an axial interaction force along the axial direction of the cylinder 312 can be generated between the central member body 311A and the cylinder 312, thereby pushing the central member body 311A and the cylinder 312 to move relative to each other along the axial direction of the cylinder 312, and further pushing the central member assembly 31C to move relative to the cylinder 312 to realize the relative movement of the stator assembly 31A and the rotor assembly 31B. And the direction of the interaction force between the central member body 311A and the cylinder 312 can be controlled by changing the direction of the current in the coil 3131.

[0100] Exemplarily, the magnetic member 3132 can be a permanent magnet, an electromagnet, an energized coil, etc.

[0101] Exemplarily, the magnetic member 3132 is an annular structure. At this time, the central member 311, the iron core 3133 and the coil 3131 all pass through the magnetic member 3132.

[0102] In some embodiments, the number of coils 3131 is multiple, and the multiple coils 3131 are arranged at intervals along the axial direction of the cylinder 312. The number of magnetic members 3132 is also multiple, and the multiple magnetic members 3132 are arranged at intervals along the axial direction of the cylinder 312.

[0103] It should be noted that the coil 3131 and the iron core 3133 are taken as a whole, and there is a gap between the outer peripheral wall surface of this whole and the inner peripheral wall surface of the magnetic member 3132, wherein, the gap between the outer peripheral wall surface of this whole and the inner peripheral wall surface of the magnetic member 3132 can be greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0104] In some examples, the central member body 311A is slidably connected to the mounting hole 3122A. In this way, when the central member body 311A and the cylinder body 312 move relative to each other, the mounting hole 3122A can limit the central member body 311A and the cylinder body 312 to prevent the central member body 311A and the cylinder body 312 from shaking or shifting.

[0105] In some examples, during the relative sliding process of the central member body 311A and the cylinder body 312, in order to prevent foreign impurities from entering the cylinder body 312 and affecting the working performance of the drive assembly 313 inside the cylinder body 312, such as Figure 7 shown, Figure 7 is Figure 3 a schematic structural diagram of the central member assembly 31C of the actuator 31 in the suspension system 3 shown. The actuator 31 further includes a sealing ring 314. The sealing ring 314 is provided around the inner wall surface of the mounting hole 3122A and the central member body 311A. That is to say, the central member body 311A passes through the sealing ring 314, and the inner circumferential wall surface of the sealing ring 314 contacts the central member body 311A. Specifically, the inner circumferential wall surface of the sealing ring 314 can abut against the central member body 311A; the outer circumferential wall surface of the sealing ring 314 contacts the inner wall surface of the mounting hole 3122A. Specifically, the outer circumferential wall surface of the sealing ring 314 abuts against the inner wall surface of the cylinder body 312.

[0106] Exemplarily, the sealing ring 314 is connected to the central member body 311A. Specifically, the sealing ring 314 can be connected to the central member body 311A by means of bonding, clamping, screwing, etc. At this time, the axial dimension of the mounting hole 3122A needs to be greater than the maximum stroke of the relative movement between the central member body 311A and the cylinder body 312.

[0107] Exemplarily, the sealing ring 314 is connected to the top wall 3122. Specifically, the sealing ring 314 can be connected to the top wall 3122 by means of bonding, clamping, screwing, etc.

[0108] By providing the sealing ring 314 between the inner wall surface around the mounting hole 3122A and the central member 311, the gap between the inner wall surface of the mounting hole 3122A and the central member body 311A can be sealed to prevent foreign impurities from entering the cylinder body 312, thereby affecting components inside the cylinder body 312 such as the magnetic assembly 31D, the magnetic part 3132, etc., and ensuring the working performance of the components inside the cylinder body 312.

[0109] In some examples, when the central member body 311A and the cylinder body 312 slide relative to each other, in order to better limit the central member body 311A and the cylinder body 312, such as Figure 7As shown, the central member 311 further includes a limiting portion 311B. The limiting portion 311B may be an annular structure that surrounds the axis of the cylinder 312. At this time, the central member body 311A passes through the limiting portion 311B and is connected to the limiting portion 311B.

[0110] As Figure 8 shown, Figure 8 for Figure 7 the top view structural schematic diagram of the central member assembly 31C in, the limiting portion 311B may also be a plurality of plate-like structures arranged at intervals around the axis of the cylinder 312. At this time, the plurality of plate-like structures surround the central member body 311A, and the central member body 311A is connected to the plurality of plate-like structures.

[0111] Exemplarily, the limiting portion 311B may be an integral structure with the central member body 311A, or may be processed separately and then assembled together.

[0112] The limiting portion 311B is provided inside the cylinder 312. Specifically, the limiting portion 311B is located on the side of the top wall 3122 facing the bottom wall 3123. In this way, when the central member body 311A and the cylinder 312 move relative to each other to the maximum stroke, the limiting portion 311B can contact the top wall 3122, thereby limiting the central member body 311A and the cylinder 312 to prevent the stroke of the relative movement between the central member body 311A and the cylinder 312 from being too large and difficult to control.

[0113] In some embodiments, in order to detect the relative displacement between the central member body 311A and the cylinder 312 to better control the stroke of the relative movement between the central member body 311A and the cylinder 312, as Figure 9 shown, Figure 9 for Figure 5 the enlarged schematic diagram of the structure at B in, the actuator 31 further includes a displacement sensor. The displacement sensor includes a reading head 315. The reading head 315 is connected to the cylinder 312. As Figure 10 shown, Figure 10 for Figure 7 the schematic diagram of the structure of the central member assembly in after removing the sleeve portion and when the fixing member does not cover the grating scale. The displacement sensor further includes a grating scale assembly 31E.

[0114] In some examples, the number of the grating scale assemblies 31E is multiple, and the multiple grating scale assemblies 31E are arranged along the circumferential direction of the cylinder 312. The number of the reading heads 315 is multiple, and one reading head 315 corresponds to one grating scale assembly 31E. By providing multiple grating scale assemblies 31E and multiple reading heads 315, the displacement sensor can still work normally when one of the grating scale assemblies 31E or the reading heads 315 fails, so as to ensure the accuracy of the displacement sensor. Exemplarily, the reading head 315 may be connected to the internal space of the cylinder 312.

[0115] Exemplarily, the read head 315 can also be connected to the mating surface of the cylinder 312 and the central member body 311A. That is, the read head 315 is connected to the outer surface of the top wall 3122. During the operation of the actuator 31, heat is generated by the magnetic assembly 31D and the magnetic member 3132, and the generated heat will accumulate in the cylinder 312. Therefore, connecting the read head 315 to the mating surface of the cylinder 312 and the central member body 311A can prevent the read head 315 from being in a high-temperature environment, thereby avoiding the influence of the excessive temperature of the read head 315 on its working performance. And the read head 315 is provided on the mating surface of the cylinder 312 and the central member body 311A, that is, the read head 315 is located outside the cylinder 312. At this time, natural heat dissipation of the read head 315 can be carried out through the flow of external air to facilitate reducing the temperature of the read head 315.

[0116] As Figure 10 shown, the grating scale assembly 31E is connected to the central member body 311A. The grating scale assembly 31E and the central member body 311A form the central member assembly 31C.

[0117] The grating scale assembly 31E includes a back plate 311Q and a grating scale 311C. The grating scale 311C is connected to the back plate 311Q. The grating scale 311C is adapted to be mounted to the target device through the back plate 311Q. Among them, the target device may include a first component and a second component that can move relative to each other. One of the grating scale assembly 31E and the read head 315 is adapted to be mounted to the first component, and the other of the grating scale assembly 31E and the read head 315 is adapted to be mounted to the second component. In this embodiment, the target device is the actuator 31, the first component may be the stator assembly 31A, and the second component may be the rotor assembly 31B. In some other examples, the target device may also be other devices including a first component and a second component that can move relative to each other, such as a linear slide table, etc.

[0118] Here, an example is given with the grating scale assembly 31E provided on the central member body 311A of the stator assembly 31A and the read head 315 provided on the cylinder 312 of the rotor assembly 31B.

[0119] The sensing surface of the read head 315 faces the grating scale 311C. The read head 315 is used to detect the signal of the position change of the grating scale 311C, so as to detect the relative displacement between the central member body 311A and the cylinder 312.

[0120] By the cooperation of the grating scale 311C and the read head 315 to detect the relative displacement between the central member body 311A and the cylinder 312, the stroke of the relative movement between the central member body 311A and the cylinder 312 can be controlled more precisely, so as to more precisely adjust the distance between the vehicle body 1 and the wheels 2, as well as the buffering performance of the elastic element 34.

[0121] It should be noted that the grating scale 311C and the reading head 315 are arranged oppositely, that is, the grating scale 311C and the reading head 315 are arranged radially along the cylinder 312, and along the arrangement direction of the grating scale 311C and the reading head 315, the reading head 315 and the grating scale 311C partially overlap to facilitate the reading head 315 to detect the signal of the grating scale 311C. Among them, when the reading head 315 is arranged on the outer surface of the top wall 3122, the grating scale 311C is arranged on the second rod section of the central member body 311A (that is, the part of the central member body 311A located outside the cylinder 312). At this time, with the relative movement of the central member 311 and the cylinder 312, a part of the grating scale 311C can move into the cylinder 312.

[0122] Exemplarily, the grating scale 311C can be a grating ruler, and the reading head 315 can be a photo-inductive head. The grating ruler and the photo-inductive head form a grating displacement sensor. An optical path system and a measurement system are provided in the photo-inductive head. When the central member 311 and the cylinder 312 move relatively, the grating ruler and the photo-inductive head will also move relatively. The optical path system in the photo-inductive head can receive the change of the optical signal on the grating ruler and transmit it to the measurement system, and the measurement system processes the optical signal to obtain a displacement signal.

[0123] Exemplarily, the grating scale 311C can be a magnetic grating scale 311D, and the reading head 315 can be a magnetic head 315A. The magnetic grating scale 311D and the magnetic head 315A form a magnetic induction sensor. Specifically, as Figure 11 shown, Figure 11 is a schematic diagram of the relationship between the magnetic head 315A and the magnetic grating scale 311D in the embodiment of the present application. The magnetic grating scale 311D includes a plurality of first magnetic poles 311E and a plurality of second magnetic poles 311F. It should be noted that the polarities of the first magnetic pole 311E and the second magnetic pole 311F are different. For example, if the first magnetic pole 311E is an N pole, then the second magnetic pole 311F is an S pole; if the first magnetic pole 311E is an S pole, then the second magnetic pole 311F is an N pole.

[0124] Exemplarily, the first magnetic pole 311E can be an energized coil, an electromagnet, a magnet, a permanent magnet, etc. The second magnetic pole 311F can be an energized coil, an electromagnet, a magnet, a permanent magnet, etc.

[0125] The plurality of first magnetic poles 311E and the plurality of second magnetic poles 311F are alternately arranged in a third direction, where the third direction is perpendicular to the arrangement direction of the back plate 311Q and the grating scale 311C. For example, the third direction can be consistent with the axial direction of the cylinder 312. That is, a second magnetic pole 311F is arranged between any two adjacent first magnetic poles 311E, and a first magnetic pole 311E is arranged between any two adjacent second magnetic poles 311F. Along the axial direction of the cylinder 312, the sizes of the first magnetic pole 311E and the second magnetic pole 311F are the same.

[0126] When the central member 311 and the cylinder 312 move relative to each other, the magnetic scale 311D and the magnetic head 315A will also move relative to each other. The magnetic head 315A can detect the magnetic field intensity at different positions on the magnetic scale 311D, and process the magnetic field intensity to obtain a displacement signal, thereby detecting the relative displacement between the central member 311 and the cylinder 312.

[0127] Since the suspension system 3 is exposed to the external environment, it is usually interfered by external dust and other impurities. Therefore, compared with the grating type sensor, by setting the grating 311C as the magnetic scale 311D and the reading head 315 as the magnetic head 315A, the interference of external impurities between the magnetic head 315A and the magnetic scale 311D can be reduced, thereby improving the detection accuracy of the magnetic head 315A and the magnetic scale 311D.

[0128] In some embodiments, in order to further improve the detection accuracy of the magnetic head 315A and the magnetic scale 311D, as Figure 11 shown, the number of magnetic scales 311D is multiple, and the multiple magnetic scales 311D are arranged along the second direction. The second direction is perpendicular to the arrangement direction of the backplane 311Q and the grating 311C, and perpendicular to the third direction. For example, the second direction can be perpendicular to the axial direction of the cylinder 312 and parallel to the surface of the backplane 311Q facing away from the grating 311C. Correspondingly, the induction surface 315B of the magnetic head 315A includes multiple induction regions, and the multiple induction regions are also arranged along the second direction. One induction region corresponds to one magnetic scale 311D and faces one magnetic scale 311D. One induction region is used to detect the magnetic field intensity of one magnetic scale 311D.

[0129] By setting multiple magnetic scales 311D and setting multiple induction regions for one magnetic head 315A, when an abnormality occurs in one of the magnetic scales 311D and the induction region, the relative displacement between the central member body 311A and the cylinder 312 can still be detected, thereby improving the detection accuracy.

[0130] It should be noted that the dimensions of the multiple magnetic scales 311D in the axial direction of the cylinder 312 can be the same or different.

[0131] Here, an example where the dimensions of the multiple magnetic scales 311D in the axial direction of the cylinder 312 are the same is used for illustration. Specifically, in some examples, the number of the first magnetic poles 311E in the multiple magnetic scales 311D is the same, and the number of the second magnetic poles 311F is the same. At this time, the dimensions of the first magnetic poles 311E in different magnetic scales 311D in the axial direction of the cylinder 312 are the same. Correspondingly, the dimensions of the second magnetic poles 311F in different magnetic scales 311D in the axial direction of the cylinder 312 are also the same.

[0132] In some other examples, along the axial direction of the cylinder body 312, the sizes of the first magnetic poles 311E of different magnetic scale rulers 311D are different. At this time, the numbers of the first magnetic poles 311E of different magnetic scale rulers 311D are different, and the numbers of the second magnetic poles 311F of different magnetic scale rulers 311D are also different.

[0133] Exemplarily, as Figure 11 shown, the number of the magnetic scale rulers 311D is two, one of which is the first magnetic scale ruler 311X, and the other is the second magnetic scale ruler 311Y. Along the axial direction of the cylinder body 312, the size of the first magnetic pole 311E of the first magnetic scale ruler 311X (such as Figure 11 the size L1 shown in Figure 11 ) is smaller than the size of the first magnetic pole 311E of the second magnetic scale ruler 311Y (such as

[0134] the size L2 shown in

[0135] ). For example, along the axial direction of the cylinder body 312, the size of the first magnetic pole 311E of the first magnetic scale ruler 311X is 6.5 mm, and the size of the first magnetic pole 311E of the second magnetic scale ruler 311Y is 7 mm. Figure 12 In this way, when the center piece body 311A and the cylinder body 312 move relative to each other to a certain position, the magnetic field intensities of the corresponding magnetic scale rulers 311D detected by different induction regions of the magnetic head 315A are inconsistent. Thus, the relative displacement of the center piece body 311A and the cylinder body 312 at this position can be determined jointly by multiple different magnetic field intensities, so that the detection of the relative displacement of the center piece body 311A and the cylinder body 312 can be more accurate, facilitating the more accurate adjustment of the buffering performance of the elastic element 34 and the distance between the vehicle body 1 and the wheel 2. Figure 12 In some embodiments, as Figure 11 shown in Figure 12 is a top view schematic diagram of the relationship between the magnetic head 315A and the magnetic scale ruler 311D. The distance (such as

[0136] the distance H shown in ) between the induction surface 315B of the magnetic head 315A and the surface of the magnetic scale ruler 311D facing the magnetic head 315A is greater than or equal to 5 mm and less than or equal to 7 mm. For example, the distance between the induction surface of the magnetic head 315A and the surface of the magnetic scale ruler 311D facing the magnetic head 315A can be 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, etc. By setting the distance between the induction surface 315B of the magnetic head 315A and the surface of the magnetic scale ruler 311D facing the magnetic head 315A within the above range, it can not only ensure that the magnetic head 315A can effectively detect the magnetic field intensity of the magnetic scale ruler 311D, but also enable a relatively large distance between the magnetic head 315A and the magnetic scale ruler 311D, facilitating the setting of a protective member between the magnetic head 315A and the magnetic scale ruler 311D to protect the magnetic scale ruler 311D.

[0137] Specifically, in some examples, such as Figure 13 shown, Figure 13 is Figure 7 the schematic diagram of the F-F cross-section in , the central member body 311A has an outer peripheral surface 311G. Exemplarily, the central member 311 is a cylindrical structure, and the outer peripheral surface 311G of the cylindrical structure is the outer peripheral surface 311G of the central member body 311A. The central member body 311A can also be a structure with a cylindrical part at one end and a plate-shaped, cuboid-shaped or other irregular-shaped structure at the other end. The outer peripheral surface 311G of the cylindrical part of the central member body 311A is the outer peripheral surface 311G of the central member body 311A.

[0138] In some embodiments, such as Figure 14 and Figure 15 shown, Figure 14 is Figure 7 the schematic diagram of the structure in when a part of the sleeve portion 311N of the central member assembly 31C is cut off and the fixing member 311U does not cover the grating scale 311C. Figure 15 is Figure 14 the enlarged schematic diagram of the structure at position C in . The central member body 311A is provided with a mounting groove 311P, and the mounting groove 311P is suitable for setting the grating scale assembly 31E. That is, both the back plate 311Q and the grating scale 311C are arranged in the mounting groove 311P. At this time, the grating scale 311C is connected to the surface of the back plate 311Q facing the outer peripheral surface 311G of the central member body 311A. In this way, the grating scale assembly 31E can be limited by the mounting groove 311P to avoid the downward offset or detachment of the grating scale assembly 31E under its own gravity, so that the grating scale assembly 31E can be more stably connected to the central member body 311A, thereby improving the stability of the cooperation between the read head 315 and the grating scale 311C.

[0139] Exemplarily, the central member body 311A is a rod-shaped structure, and the outer peripheral surface 311G of the central member body 311A is provided with a mounting groove 311P that is recessed away from the outer peripheral surface 311G. The grating scale assembly 31E is arranged in the mounting groove 311P, and then a cover plate is used to cover the mounting groove 311P, thereby sealing the grating scale assembly 31E in the mounting groove 311P to protect the grating scale assembly 31E, that is, to protect the grating scale 311C, and avoid the abrasion of the grating scale 311C caused by friction with other components when the central member body 311A and the cylinder body 312 move relative to each other, so as to improve the service life of the grating scale 311C and ensure the working performance of the grating scale 311C.

[0140] Exemplarily, such as Figure 14 shown, in Figure 14 the sleeve portion 311N of the central member assembly 31C is cut off a part and the fixing member 311U does not cover the grating scale 311C. Compared with Figure 14 , Figure 7The middle sleeve part 311N is complete and completely shields the grating scale assembly 31E inside the installation groove 311P. The center piece body 311A includes a central part 311M and a sleeve part 311N. The central part 311M is provided with an installation groove 311P. The grating scale assembly 31E is fixed in the installation groove 311P of the central part 311M. Specifically, the central part 311M can be a rod-shaped structure. The central part 311M can also be a plate-shaped structure.

[0141] The sleeve part 311N is a cylindrical structure. The sleeve part 311N is arranged around the central part 311M, that is, the central part 311M passes through the sleeve part 311N. The installation groove 311P is recessed from the surface of the central part 311M facing the sleeve part 311N in a direction away from the sleeve part 311N. After the grating scale 311C is arranged in the installation groove 311P, the grating scale 311C is located in the area surrounded by the sleeve. In this way, the grating scale 311C can be protected by the sleeve part 311N to avoid abrasion caused by friction between the grating scale 311C and other components when the central piece 311 and the cylinder body 312 move relative to each other, so as to improve the service life of the grating scale 311C and ensure the working performance of the grating scale 311C.

[0142] It should be noted that when the grating scale 311C is a grating scale, the sleeve part 311N can be made of a transparent material. For example, the material of the sleeve part 311N can be transparent plastic, PC material, etc. When the grating scale 311C is a magnetic grating scale 311D, the sleeve part 311N can be made of a non-magnetic material. For example, the material of the sleeve part 311N can be plastic, polystyrene, polycarbonate, etc.

[0143] In some embodiments, as Figure 16 shown, Figure 16 is a schematic diagram of the connection relationship between the grating scale 311C and the back plate in the embodiment of the present application. For the convenience of installing the grating scale 311C, the back plate 311Q is accommodated in the installation groove 311P, and the grating scale 311C is connected to the surface of the back plate 311Q facing the sleeve part 311N. Specifically, the read head 315 corresponds to the installation groove 311P. After the back plate 311Q is accommodated in the installation groove 311P, the surface of the back plate 311Q facing the sleeve part 311N faces the read head 315. After the grating scale 311C is connected to the surface of the back plate 311Q facing the sleeve part 311N, the grating scale 311C faces the read head 315, so that the read head 315 can conveniently detect the signal of the grating scale 311C.

[0144] Among them, when the grating scale 311C is a magnetic grating scale 311D and the number of magnetic grating scales 311D is multiple, multiple magnetic grating scales 311D can be installed on the same back plate 311Q, or one magnetic grating scale 311D can be installed on one back plate 311Q. For example, Figure 16 shows two grating scales 311C, and the two grating scales 311C are installed on one back plate 311Q.

[0145] In some examples, the grating scale 311C can be bonded to the back plate 311Q. In some other examples, the grating scale 311C is detachably connected to the back plate 311Q. For example, the grating scale 311C is snap-connected to the back plate 311Q, or connected by bolts, etc. In this way, it is convenient to detach the grating scale 311C from the back plate 311Q, so as to facilitate the replacement or repair of the grating scale 311C.

[0146] In some examples, the back plate 311Q can be connected to the central portion 311M by bonding, snap connection, screwing, etc.

[0147] In some other examples, at least a part of the back plate 311Q is in interference fit with the inner wall surface of the installation groove 311P. That is, the back plate 311Q can be in interference fit with the inner wall surface of the installation groove 311P as a whole, or a part of the back plate 311Q can be in interference fit with the inner wall surface of the installation groove 311P.

[0148] Exemplarily, a part of the back plate 311Q is in interference fit with the inner wall surface of the installation groove 311P. In this way, when installing the back plate 311Q into the installation groove 311P, a large force does not need to be used, so that the installation of the back plate 311Q can be facilitated. And after the back plate 311Q is installed into the installation groove 311P, only a part of the back plate 311Q is subjected to the extrusion force of the inner wall surface of the installation groove 311P, so that the extrusion force on the back plate 311Q can be reduced to avoid deformation and damage of the back plate 311Q.

[0149] For example, two side surfaces of the back plate 311Q in the direction perpendicular to the axial direction of the cylinder 312 are respectively in contact with two inner wall surfaces of the installation groove 311P in the direction perpendicular to the axial direction of the cylinder 312, and two side surfaces of the back plate 311Q in the axial direction of the cylinder 312 are respectively spaced from two inner wall surfaces of the installation groove 311P in the axial direction of the cylinder 312.

[0150] For example, as Figure 16 shown, the back plate 311Q includes a main body portion 311R, a first convex portion 311S and a second convex portion 311T. The grating scale 311C is connected to the main body portion 311R. The first convex portion 311S and the second convex portion 311T are respectively connected to two ends of the main body portion 311R in the first direction. There is an interference fit between the first convex portion 311S and the inner wall surface of the installation groove 311P, and between the second convex portion 311T and the inner wall surface of the installation groove 311P. Wherein, the first direction is perpendicular to the arrangement direction of the back plate 311Q and the grating scale 311C. For example, the first direction can be the same as the second direction or the same as the third direction.

[0151] By providing the first protrusion 311S and the second protrusion 311T, and making the first protrusion have an interference fit with the inner wall surface of the installation groove 311P, and making the second protrusion 311T have an interference fit with the inner wall surface of the installation groove 311P, an interference fit between a part of the back plate 311Q and the central part 311M is achieved, facilitating the installation of the back plate 311Q and the central part 311M.

[0152] Wherein, when the first direction can be the same as the second direction, the first protrusion 311S and the second protrusion 311T can be located at one end of the main body part 311R facing the top cover 33, or can be located at one end of the main body part 311R facing away from the top cover 33. The setting positions of the first protrusion 311S and the second protrusion 311T are not limited herein.

[0153] In some embodiments, as Figure 10 shown, in Figure 10 , the fixing member 311U is located at one end of the installation groove 311P facing away from the top cover 33 and has not blocked the installation groove 311P yet. The central member 311 further includes the fixing member 311U. The fixing member 311U is located on one side of the grating scale 311C facing the outer peripheral surface 311G. That is, the fixing member 311U is located between the grating scale 311C and the sleeve part 311N. The fixing member 311U covers the surface of the grating scale 311C facing the outer peripheral surface 311G (i.e., facing the sleeve part 311N). Specifically, the fixing member 311U can be provided in the installation groove 311P and block the installation groove 311P into a sealed space, and the grating scale 311C is provided in this sealed space. In this way, it is possible to prevent impurities such as dust, water, and oil from entering the installation groove 311P, thereby affecting the grating scale 311C and further affecting the sensitivity between the reading head 315 and the grating scale 311C.

[0154] Exemplarily, the fixing member 311U can be a plate-like structure or a shell-like structure. The fixing member 311U can be made of flexible materials such as rubber, latex, and silica gel.

[0155] Exemplarily, when the grating scale 311C is a grating ruler, the fixing member 311U can be made of transparent materials such as transparent plastic and PC material. When the grating scale 311C is a magnetic grating scale 311D, the fixing member 311U can be made of non-magnetic materials. For example, the material of the sleeve part 311N can be plastic, polystyrene, polycarbonate, etc.

[0156] Exemplarily, when installing the fixing member 311U, one end of the fixing member 311U can be snapped into one end of the installation groove 311P facing away from the top cover 33, and then along the direction of the installation groove 311P towards the top cover 33 (such as Figure 10Push the fixing member 311U in the direction indicated by the arrow (in the figure), until the entire fixing member 311U is snap-fitted into the installation groove 311P and seals the installation groove 311P. In some other examples, the fixing member 311U can also be connected to the central portion 311M by bonding, screwing, or other means.

[0157] In some embodiments, as Figure 12 shown, the orthographic projection of the grating ruler 311C on the first plane is an arc-shaped structure, and the arc-shaped structure arches in the direction away from the back plate 311Q. That is to say, the grating ruler 311C is in the shape of an arc sheet, the axis of the arc sheet is the same as the axis of the sleeve portion 311N, and the arc sheet arches towards the sleeve portion 311N. Specifically, the arc sheet arches towards the read head 315. In this way, the grating ruler 311C can better fit the outer wall surface of the central portion 311M, so as to improve the connection effect between the grating ruler 311C and the central portion 311M. Among them, the first plane is parallel to the arrangement direction of the back plate 311Q and the grating ruler 311C. That is, the first plane is perpendicular to the axis of the cylinder 312.

[0158] Exemplarily, when the grating ruler 311C is connected to the back plate 311Q, the surface of the back plate 311Q facing the grating ruler 311C is an arc shape matching the grating ruler 311C. Specifically, the orthographic projection of the surface of the back plate 311Q facing the grating ruler 311C on the first plane is a first arc structure matching the arc-shaped structure, and the surface of the back plate 311Q facing the grating ruler 311C is connected to the grating ruler 311C. In this way, the grating ruler 311C can be better attached to the back plate 311Q, and the connection effect between the grating ruler 311C and the back plate 311Q can be improved.

[0159] In some examples, the orthographic projection of the surface of the back plate 311Q facing away from the grating ruler 311C on the first plane is a straight-line structure and is suitable for connecting to the target device. Specifically, the surface of the back plate 311Q facing away from the grating ruler 311C is a plane, and the surface of the back plate 311Q facing away from the grating ruler 311C is connected to the inner wall surface of the installation groove 311P facing away from the sleeve portion 311N. In this way, the back plate 311Q can be better attached to the inner wall surface of the installation groove 311P facing away from the sleeve portion 311N, so as to improve the stability of the back plate 311Q in the installation groove 311P.

[0160] In addition, under the working conditions of the vehicle 1000 turning and rolling, the central member body 311A of the actuator 31 and the cylinder 312 will also rotate relative to each other. Therefore, the grating ruler 311C is set in the shape of an arc sheet. When the central member body 311A and the cylinder 312 rotate relative to each other, a part of the sensing surface 315B of the read head 315 will have a smaller distance change from the grating ruler 311C, so that the magnetic field intensity of the grating ruler 311C can be detected more accurately.

[0161] On this basis, in order to more accurately detect the magnetic field intensity of the grating ruler 311C, as Figure 12As shown, the orthographic projection of the sensing surface 315B of the reader head 315 on the first plane is a second arc structure, and the second arc structure is recessed in the direction away from the grating scale 311C of the reader head 315. That is, the sensing surface 315B is an arc surface, and the arc surface is recessed in the direction away from the grating scale 311C of the reader head 315. Exemplarily, the sensing surface 315B of the magnetic head 315A is an arc surface, and the arc surface is recessed in the direction away from the magnetic grating scale 311D of the magnetic head 315A. In this way, when the central member body 311A rotates relative to the cylinder 312, the distance between a part of the sensing surface 315B of the reader head 315 and the grating scale 311C changes less, so that the magnetic field strength of the grating scale 311C can be detected more accurately.

[0162] In some examples, the grating scale 311C and the sensing surface 315B of the reader head 315 are coaxial. Specifically, the orthographic projection of the surface of the grating scale 311C facing the sleeve portion 311N on the first plane is a first arc, and the orthographic projection of the sensing surface 315B of the reader head 315 on the first plane is a second arc. Both the first arc and the second arc are recessed in the direction from the grating scale 311C towards the reader head 315, and the centers of the first arc and the second arc coincide. In this way, when the central rod rotates relative to the cylinder 312, the distance between the sensing surface 315B of the reader head 315 and the grating scale 311C remains unchanged all the time, so that the magnetic field strength of the grating scale 311C can be detected more accurately.

[0163] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A scale assembly, characterized in that: Applied to displacement sensors, the scale assembly comprises: Back panel (311Q); A scale (311C) is connected to the back plate (311Q) and is suitable for being mounted to a target device through the back plate (311Q).

2. A scale assembly according to claim 1, characterised in that The scale (311C) is bonded to the back plate (311Q).

3. A scale assembly according to claim 1, characterised in that The orthographic projection of the scale (311C) on the first plane is an arc-shaped structure, and the arc-shaped structure is arched in a direction away from the back plate (311Q), wherein the first plane is parallel to the arrangement direction of the back plate (311Q) and the scale (311C).

4. A scale assembly according to claim 3, characterised in that The orthographic projection of the surface of the back plate (311Q) facing the scale (311C) on the first plane is a first arc structure matching the arc structure and connected to the scale (311C).

5. A scale assembly according to claim 3, characterised in that The orthographic projection of the surface of the back plate (311Q) facing away from the scale (311C) on the first plane is a straight line structure and is suitable for connecting with the target device.

6. A scale assembly according to any one of claims 1 to 5, characterised in that The back plate (311Q) comprises: Main body (311R); A first protrusion (311S) and a second protrusion (311T), wherein the first protrusion (311S) and the second protrusion (311T) are respectively connected to two ends of the main body (311R) in a first direction, wherein the first direction is perpendicular to an arrangement direction of the back plate (311Q) and the scale (311C).

7. A scale assembly according to any one of claims 1 to 5, characterised in that The grid scale (311C) is a magnetic grid scale (311D).

8. A scale assembly according to claim 7, characterised in that There are multiple magnetic scales (311D), and the multiple magnetic scales (311D) are arranged along a second direction, and the second direction is perpendicular to the arrangement direction of the back plate (311Q) and the scales (311C).

9. A scale assembly according to claim 8, characterised in that The magnetic scale (311D) comprises a plurality of first magnetic poles (311E) and a plurality of second magnetic poles (311F), wherein the plurality of first magnetic poles (311E) and the plurality of second magnetic poles (311F) are alternately arranged along a third direction, wherein the third direction is perpendicular to the arrangement direction of the back plate (311Q) and the scale (311C), and perpendicular to the second direction; along the third direction, the first magnetic poles (311E) and the second magnetic poles (311F) have the same size.

10. A scale assembly according to claim 9, characterised in that Along the third direction, the sizes of the first magnetic poles (311E) of different magnetic scales (311D) are different.

11. A displacement sensor, characterized in that: A device comprising a read head (315) and a scale assembly according to any one of claims 1 to 10, wherein the target device comprises a first component and a second component which are relatively movable, one of the scale assembly and the read head (315) being adapted to be mounted to the first component, and the other of the scale assembly and the read head (315) being adapted to be mounted to the second component; The read head (315) is located on a side of the scale (311C) facing away from the back plate (311Q), and a sensing surface (315B) of the read head (315) faces the scale (311C).

12. The displacement sensor according to claim 11, characterized in that: The orthographic projection of the scale (311C) on the first plane is an arc-shaped structure, and the arc-shaped structure is arched in a direction away from the back plate (311Q), wherein the first plane is parallel to the arrangement direction of the back plate (311Q) and the scale (311C); The orthographic projection of the sensing surface (315B) on the first plane is a second arc structure, and the second arc structure is recessed in a direction away from the reading head (315) and away from the scale (311C).

13. The displacement sensor according to any one of claims 11 to 12, characterized in that: The scale (311C) is a magnetic scale (311D); and the reading head (315) is a magnetic head (315A).

14. The displacement sensor according to any one of claims 11 to 12, characterized in that: There are a plurality of magnetic scales (311D), and the plurality of magnetic scales (311D) are arranged along a second direction, wherein the second direction is perpendicular to an arrangement direction of the back plate (311Q) and the scales (311C); The sensing surface (315B) includes a plurality of sensing areas, and one of the sensing areas faces one of the magnetic scales.

15. The displacement sensor according to any one of claims 11 to 12, characterized in that: There are multiple scale components, and the multiple scale components are arranged around the direction of relative movement of the first component and the second component; there are multiple read heads (315), and one read head (315) corresponds to one scale component.

16. The displacement sensor according to claim 13, characterized in that: The distance between the sensing surface (315B) of the magnetic head (315A) and the surface of the magnetic scale (311D) facing the magnetic head (315A) is greater than or equal to 5 mm and less than or equal to 7 mm.

17. A center piece, characterized in that: The invention comprises a center piece body (311A), wherein the center piece body (311A) is provided with a mounting groove (311P), and the mounting groove (311P) is suitable for arranging a scale assembly according to any one of claims 1 to 10.

18. The center piece according to claim 17, characterized in that At least a portion of the back plate (311Q) is interference-fitted with the inner wall surface of the installation groove (311P).

19. The center piece according to claim 18, characterized in that The back plate (311Q) comprises: Main body (311R); a first protrusion (311S) and a second protrusion (311T), wherein the first protrusion (311S) and the second protrusion (311T) are respectively connected to two ends of the main body (311R) in a first direction, wherein the first direction is perpendicular to an arrangement direction of the back plate (311Q) and the scale (311C); There is interference fit between the first protrusion (311S) and the inner wall surface of the installation groove (311P), as well as between the second protrusion (311T) and the inner wall surface of the installation groove (311P).

20. The center piece according to any one of claims 17 to 19, characterized in that The centerpiece body (311A) comprises: A central portion (311M), wherein the central portion (311M) is provided with the mounting groove (311P); A sleeve portion (311N), the sleeve portion (311N) is arranged around the central portion (311M), the mounting groove (311P) is recessed from the surface of the central portion (311M) facing the sleeve portion (311N) to a direction away from the sleeve portion (311N), and the scale (311C) is located in the area surrounded by the sleeve.

21. A centerpiece assembly, characterized in that: include: The scale assembly according to any one of claims 1 to 10 and the center piece according to any one of claims 17 to 20, wherein the target device comprises the center piece body (311A).

22. The centerpiece assembly according to claim 21, characterized in that The center piece body (311A) has an outer peripheral surface (311G), and the scale (311C) is connected to the surface of the back plate (311Q) of the scale assembly facing the outer peripheral surface (311G).

23. The centerpiece assembly according to claim 22, characterized in that The center piece assembly also includes a fixing piece (311U), which is located on the side of the scale (311C) facing the outer peripheral surface (311G) and covers the surface of the scale (311C) facing the outer peripheral surface (311G).

24. A stator assembly, characterized in that: include: The centerpiece assembly according to any one of claims 21 to 23; A magnetic component is sleeved on the center piece body (311A).

25. The stator assembly according to claim 24, characterized in that The magnetic assembly comprises: An iron core (3133), the iron core (3133) is connected to the center piece body (311A), and a coil slot is formed on the iron core (3133); A coil (3131), wherein the coil (3131) is accommodated in the coil slot.

26. The stator assembly according to claim 24, characterized in that The center piece body (311A) comprises a first rod segment and a second rod segment, the magnetic component is connected to the first rod segment, and the scale component of the center piece component is connected to the second rod segment.

27. An actuator, characterized in that: include: The stator assembly according to any one of claims 24 to 26; The movable subassembly is sleeved on the outer peripheral side of the stator assembly, and the movable subassembly can move relative to the stator assembly along the axial direction of the actuator.

28. The actuator according to claim 27, characterized in that The mover assembly comprises: A cylinder (312), the cylinder (312) comprising a mounting hole (3122A) arranged along its circumference, the mounting hole (3122A) being in communication with an internal space of the cylinder (312); a center piece body (311A) of the stator assembly is inserted into the mounting hole (3122A), and a magnetic assembly of the stator assembly is located in the cylinder (312); A magnetic member (3132), wherein the magnetic member (3132) is fixedly arranged on the inner circumference of the cylinder (312), and the magnetic member (3132) is located between the cylinder (312) and the magnetic assembly.

29. The actuator according to claim 28, characterized in that It also includes a displacement sensor as described in any one of claims 11 to 16, wherein the scale assembly of the displacement sensor is connected to the center piece body (311A), the read head (315) of the displacement sensor is connected to the cylinder (312), and the sensing surface (315B) of the read head (315) faces the scale (311C).

30. The actuator according to claim 29, characterized in that The reading head (315) is provided on the surface where the cylinder (312) cooperates with the center piece body (311A).

31. The actuator according to claim 28, characterized in that It also includes a sealing ring (314), which is arranged between the inner wall surface of the mounting hole (3122A) and the center piece body (311A).

32. A suspension system, characterized in that: include: The actuator according to any one of claims 27 to 31; A fork arm (32), wherein the fork arm (32) is connected to the movable subassembly; A top cover (33), wherein the top cover (33) is connected to the stator assembly.

33. The suspension system of claim 32, wherein: Also includes: A lower support (3121), wherein the lower support (3121) is fixedly disposed on the mover assembly; An elastic element (34), wherein the elastic element (34) is arranged between the lower support (3121) and the top cover (33).

34. A vehicle, characterized in that: include: A suspension system as claimed in any one of claims 32 to 33; A vehicle body (1), the vehicle body (1) being connected to one of the fork arm (32) and the top cover (33); A wheel (2), the wheel (2) is arranged below the vehicle body (1) and is connected to the other of the fork arm (32) and the top cover (33).

35. A vehicle, characterized in that: It comprises the displacement sensor as described in any one of claims 11 to 16, wherein the first component is a movable component and the second component is a stator component.

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