Actuator, suspension and vehicle

Abstract

An actuator, a suspension and a vehicle. The actuator (31) comprises a first assembly and a second assembly that can move relative to each other in the axial direction of the actuator (31). The first assembly comprises a housing (312), the second assembly comprises a central member (311), and the central member (311) and the housing (312) can move relative to each other in the axial direction of the actuator (31). The actuator (31) further comprises a sealing bracket (317) and a sealing assembly (31A), the sealing bracket (317) being disposed on the housing (312). The sealing assembly (31A) is provided between the sealing bracket (317) and the central member (311), and the sealing assembly (31A) is configured to achieve sealing between the sealing bracket (317) and the central member (311).

Description

Actuator, suspension and vehicle

[0001] This application claims priority to Chinese Patent Application No. 202422200287.4, filed on September 6, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of vehicles, and in particular, to an actuator, a suspension and a vehicle. BACKGROUND

[0003] The actuator is a main component of the suspension. The actuator generally comprises a housing, a center rod and a driving assembly. The center rod extends into the housing, and the driving assembly is capable of driving the center rod and the housing to slide relative to each other to adjust the damping performance of the suspension, thereby reducing the vibration of the vehicle body and improving the comfort and handling performance of the vehicle. SUMMARY

[0004] In a first aspect, an actuator is provided, comprising a first component and a second component capable of relative movement along an axial direction of the actuator. The first component comprises a housing, and the second component comprises a center piece capable of relative movement along the axial direction of the actuator with the housing. The actuator further comprises a sealing bracket and a sealing assembly. The sealing bracket is arranged on the housing. The sealing assembly is arranged between the sealing bracket and the center piece, and is configured to seal the gap between the housing and the center piece.

[0005] The actuator provided by the embodiments of the present disclosure can avoid the entry of foreign matter into the mounting hole of the top wall under the sealing effect of the sealing assembly, and thus can avoid the influence of foreign matter on the relative movement of the center piece and the housing, thereby improving the reliability of the suspension.

[0006] In some embodiments, the sealing bracket is arranged on the outer side of the housing and is detachably connected with the top wall of the housing.

[0007] In some embodiments, a part of the sealing assembly is arranged between the top wall and the sealing bracket, and the sealing assembly is arranged around the center piece and in contact with the center piece. In this way, the sealing assembly can seal the gap between the sealing bracket and the center piece, and also can seal the gap between the sealing bracket and the top wall, thereby improving the sealing effect and improving the reliability of the suspension.

[0008] In some embodiments, the sealing assembly comprises a sealing piece, the sealing piece comprises an annular sealing portion and a supporting portion, an inner circumferential surface of the annular sealing portion is in contact with the central piece. The supporting portion is connected to an outer circumferential surface of the annular sealing portion and is arranged around the annular sealing portion, and the supporting portion is arranged between the top wall and the sealing support. Through the arrangement of the annular sealing portion and the supporting portion, the sealing piece can be fixed by the sealing support.

[0009] In some embodiments, when the annular sealing portion is in a free state, along the axial direction of the annular sealing portion, the spacing between the inner circumferential surface of the annular sealing portion and the axis of the annular sealing portion first increases and then decreases. In this way, when the annular sealing portion is in abutment with the central piece, the annular sealing portion is more easily deformed, so that the annular sealing portion can be more closely fitted with the central piece to improve the sealing effect of the annular sealing portion.

[0010] In some embodiments, the annular sealing portion has a first sealing end and a second sealing end at two ends along the axial direction. The supporting portion is located between the first sealing end and the second sealing end along the axial direction of the annular sealing portion. In this way, the structural strength of the sealing piece can be enhanced, and when the central piece and the sealing piece slide relative to each other, the supporting portion has portions of the annular sealing portion on both sides in the axial direction of the sealing piece and in frictional contact with the central piece, thereby reducing the large shaking of the annular sealing portion in the axial direction and improving the sealing effect.

[0011] In some embodiments, the sealing assembly further comprises a pressing piece arranged between the supporting portion and the top wall.

[0012] In some embodiments, the pressing piece is arranged around the annular sealing portion.

[0013] In some embodiments, the sealing support comprises a main body portion and a connecting portion, the main body portion is located on a side of the supporting portion facing away from the top wall. The connecting portion is connected to the main body portion and is arranged around the supporting portion, and the connecting portion is connected to the housing. In this way, the connecting portion can shield the supporting portion, so that the sealing support can shield the sealing piece to protect the sealing piece from being damaged by external leakage.

[0014] In some embodiments, the top wall is provided with a mounting hole, the mounting hole is in communication with the internal space of the housing. The central piece is arranged in the mounting hole, and part of the central piece is located in the housing.

[0015] In some embodiments, the actuator further comprises a first sliding bearing arranged in the mounting hole and in interference fit with the top wall. The central piece is arranged in the first sliding bearing and is in sliding connection with the first sliding bearing. The first sliding bearing can improve the smoothness of the relative movement between the central piece and the housing.

[0016] In some embodiments, the inner wall surface of the housing is provided with a limiting boss located on the side of the first sliding bearing opposite to the sealing assembly, so as to limit the first sliding bearing.

[0017] In some embodiments, the limiting boss surrounds the axis of the housing.

[0018] In some embodiments, the equivalent inner diameter of the limiting boss is greater than the equivalent inner diameter of the first sliding bearing. In this way, when the central member slides relative to the first sliding bearing, the central member can be prevented from contacting the limiting boss, so as to prevent the limiting boss from affecting the sliding of the central member relative to the first sliding bearing, and the limiting boss can also be prevented from causing abrasion to the central member.

[0019] In some embodiments, the distance between the inner circumferential surface of the limiting boss and the outer circumferential surface of the first sliding bearing is greater than half of the thickness of the first sliding bearing in the radial direction. In this way, the contact area between the limiting boss and the first sliding bearing can be ensured, so as to improve the limiting effect of the limiting boss on the first sliding bearing.

[0020] In some embodiments, the inner wall surface of the housing is further provided with a clamping groove, and the actuator further comprises a clamping ring clamped in the clamping groove and located between the first sliding bearing and the sealing assembly, so as to limit the first sliding bearing.

[0021] In some embodiments, the equivalent inner diameter of the clamping ring is greater than the equivalent inner diameter of the first sliding bearing. In this way, when the central member slides relative to the first sliding bearing, the central member can be prevented from contacting the clamping ring, so as to prevent the clamping ring from affecting the sliding of the central member relative to the first sliding bearing, and the clamping ring can also be prevented from causing abrasion to the central member.

[0022] In some embodiments, the distance between the inner circumferential surface of the clamping ring and the outer circumferential surface of the first sliding bearing is greater than half of the thickness of the first sliding bearing in the radial direction. In this way, the contact area between the clamping ring and the first sliding bearing can be ensured, so as to improve the limiting effect of the clamping ring on the first sliding bearing.

[0023] In some embodiments, the clamping ring is provided with an elastic notch, and the portions of the clamping ring located on both sides of the elastic notch are respectively provided with a first clamping notch and a second clamping notch. In this way, the clamping ring can be deformed by extrusion with an external tool, so as to facilitate the clamping of the clamping ring into the clamping groove.

[0024] In some embodiments, the first clamping notch includes opposite first and second ends, the first end penetrates the clasp, and the second end is closer to the second clamping notch than the first end. The second clamping notch includes opposite third and fourth ends, the third end penetrates the clasp, and the fourth end is closer to the first clamping notch than the third end. In this way, after the external tool is clamped into the first and second clamping notches, the first and second clamping notches can limit the external tool to avoid the external tool from escaping from the first and second clamping notches, thereby improving the stability during the pressing of the clasp.

[0025] In some embodiments, the main body portion is provided with a mounting notch, the actuator further includes a sensor reading head and a magnetic scale, the magnetic scale is connected to the central member, and the sensor reading head is arranged in the mounting notch and connected to the main body portion. The sensor reading head is configured to detect changes in the magnetic field strength of the magnetic scale. By arranging the sensor reading head in the mounting notch, the sensor reading head and the sealing support can be more reasonably arranged, and a larger space can be avoided.

[0026] In some embodiments, the sealing support is provided with a first wire slot, the housing is provided with a second wire slot, and the first wire slot and the second wire slot are in communication. The actuator further includes a sensor connection wire connected to the sensor reading head and arranged in the first wire slot and the second wire slot. The first wire slot and the second wire slot can accommodate the sensor connection wire, so as to avoid the sensor connection wire being too scattered and inconvenient to replace and maintain.

[0027] In some embodiments, the actuator further includes a driving assembly arranged between the portion of the central member located in the housing and the housing and configured to drive the housing to move relative to the central member along the axial direction of the housing.

[0028] In some embodiments, the driving assembly includes an electromagnetic coil and a magnetic member, one of the electromagnetic coil and the magnetic member is connected to the housing and forms a first assembly together with the housing, and the other of the electromagnetic coil and the magnetic member is connected to the central member and forms a second assembly together with the central member.

[0029] In a second aspect, a suspension is provided, including an actuator, a fork arm, a top cover, and an elastic element, the fork arm is connected to the housing, the top cover is connected to the central member, and the elastic element is arranged between the housing and the top cover.

[0030] In a third aspect, a vehicle is provided, including a suspension, a vehicle body, and a wheel, the vehicle body is connected to one of the fork arm and the top cover. The wheel is arranged below the vehicle body and connected to the other of the fork arm and the top cover. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some of the embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0032] Fig. 1 is a structural schematic diagram of a vehicle according to some embodiments;

[0033] Fig. 2 is a perspective structural diagram of a suspension in the vehicle shown in Fig. 1;

[0034] Fig. 3 is a partial structural diagram of the suspension shown in Fig. 2;

[0035] Fig. 4 is a front view of the suspension shown in Fig. 2;

[0036] Fig. 5 is a sectional view along line E-E in Fig. 4;

[0037] Fig. 6 is an enlarged view of the partial structure at circle A in Fig. 5;

[0038] Fig. 7 is a partial structural diagram of an actuator in the suspension shown in Fig. 2;

[0039] Fig. 8 is an enlarged view of the partial structure at circle B in Fig. 5;

[0040] Fig. 9 is a front view of the partial structure of the actuator;

[0041] Fig. 10 is a sectional view along line F-F in Fig. 9;

[0042] Fig. 11 is an enlarged view of the partial structure at circle C in Fig. 10;

[0043] Fig. 12 is a structural diagram of a snap ring of the actuator in Fig. 9;

[0044] Fig. 13 is a perspective structural diagram of a seal according to some embodiments;

[0045] Fig. 14 is a front view of the seal in Fig. 13;

[0046] Fig. 15 is a sectional view along line M-M in Fig. 14;

[0047] Fig. 16 is a perspective structural diagram of a seal support according to some embodiments;

[0048] Fig. 17 is a diagram of a positional relationship between the seal support and the seal according to some embodiments;

[0049] Fig. 18 is another diagram of a positional relationship between the seal support and the seal according to some embodiments;

[0050] Fig. 19 is a top view of the seal support in Fig. 16;

[0051] Fig. 20 is a sectional view taken along line N-N of Fig. 19; and

[0052] Fig. 21 is an enlarged view of a partial structure at circle D of Fig. 3.

[0053] Reference signs: 1000, vehicle; 1, vehicle body; 2, wheel; 3, suspension; 31, actuator; 311, center piece; 312, housing; 3121, limiting part; 3122, top wall; 3122A, mounting hole; 3123, bottom wall; 3124, peripheral wall plate; 3125, limiting boss; 3126, clamping groove; 3127, second wire slot; 313, drive assembly; 3131, electromagnetic coil; 3132, magnetic piece; 314, iron core; 315, first sliding bearing; 316, clamping ring; 3161, elastic notch; 3162, first clamping notch; 3162A, first end; 3162B, second end; 3163, second clamping notch; 3163A, third end; 3163B, fourth end; 317, sealing support; 3171, avoiding through hole; 3172, main body part; 3173, connecting part; 3174, mounting notch; 3175, first wire slot; 31A, sealing assembly; 318, sealing piece; 3181, annular sealing part; 3181A, first sealing end; 3181B, second sealing end; 3182, supporting part; 318A, pressing sheet; 319, position sensor; 3191, sensor reading head; 3192, magnetic grating ruler; 32, fork arm; 33, top cover; 34, elastic element; 35, supporting piece. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0055] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is two or more.

[0056] In the description of the present disclosure, it should be explained that, unless explicitly defined and limited, the terms "mount", "connect", "connection", "communication" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0057] In the embodiments of the present disclosure, the terms "comprising", "containing" or any other variants thereof are intended to cover non-exclusive containing, so that the process, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, article or device. Without more limitation, the element defined by the sentence "including a…" does not exclude the presence of other identical elements in the process, article or device including the element.

[0058] In the embodiments of the present disclosure, the words such as "exemplary" or "for example" are used to mean an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present disclosure should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words such as "exemplary" or "for example" are intended to present the relevant concept in a specific manner.

[0059] In the description of the specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0060] Since the suspension is exposed to the external environment, during the driving of the vehicle, the external dust, water, oil and other impurities will adhere to the suspension, thereby entering the connection between the center rod and the shell, and then affecting the relative sliding of the center rod and the shell. In this way, the reliability of the suspension will be affected.

[0061] In order to solve the above problems, some embodiments of the present disclosure provide a vehicle 1000. The vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a range-extended electric vehicle, a fuel vehicle, etc. The vehicle 1000 can also be a sedan, a van, a bus, a truck, a trailer, etc.

[0062] As shown in FIG. 1, the vehicle 1000 includes a vehicle body 1 and wheels 2. The vehicle body 1 is configured to be occupied by a driver and passengers and to carry articles, the wheels 2 are installed below the vehicle body 1 and are configured to carry the vehicle body 1, and the wheels 2 can roll on the road surface to drive the vehicle 1000.

[0063] The vehicle 1000 further comprises a suspension 3. The suspension 3 is disposed between the vehicle body 1 and the vehicle wheel 2, and is configured to transmit force and torque between the vehicle body 1 and the vehicle wheel 2, and to buffer the impact force received by the vehicle body 1 during the driving of the vehicle 1000, so as to improve the riding or driving comfort.

[0064] It should be noted that the suspension 3 can be a non-independent suspension, an independent suspension, or an active suspension.

[0065] In some embodiments of the present disclosure, the suspension 3 is an active suspension, and the stiffness and damping characteristics of the active suspension are dynamically self-adaptively adjusted according to the driving conditions of the vehicle 1000, such as the motion state of the vehicle 1000 and the condition of the road surface, so that the suspension 3 system is always in the best damping state. For example, as shown in FIG. 2, the suspension 3 can comprise an actuator 31, a wishbone 32, and a top cover 33. The wishbone 32 and the top cover 33 are respectively connected to opposite ends of the actuator 31, and the actuator 31 is configured to drive the wishbone 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 wishbone 32.

[0066] One of the wishbone 32 and the top cover 33 is connected to the vehicle body 1, and the other of the wishbone 32 and the top cover 33 is connected to the vehicle wheel 2. That is, if the wishbone 32 is connected to the vehicle body 1, then the top cover 33 is connected to the vehicle wheel 2; if the wishbone 32 is connected to the vehicle wheel 2, then the top cover 33 is connected to the vehicle body 1.

[0067] In this way, by adjusting the relative displacement between the top cover 33 and the wishbone 32 through the actuator 31, the relative displacement between the vehicle body 1 and the vehicle wheel 2 can be adjusted. Thus, when encountering rough roads or turning, the spacing between the vehicle body 1 and the vehicle wheel 2 can be adjusted through the actuator 31 to maintain the balance of the vehicle body 1 and improve the riding comfort of the vehicle 1000.

[0068] As shown in FIG. 2, the suspension 3 further comprises a resilient element 34. The resilient element 34 is connected between the actuator 31 and the top cover 33, and when the actuator 31 adjusts the relative displacement between the top cover 33 and the wishbone 32, the resilient element 34 will stretch and contract with the relative movement of the top cover 33 and the wishbone 32, so that the buffering performance of the resilient element 34 can be adjusted to meet the buffering requirements of the vehicle 1000, thereby improving the riding comfort of the vehicle 1000.

[0069] In some embodiments, as shown in FIG. 3, the actuator 31 comprises a first component and a second component that can relatively move in the axial direction of the actuator 31. In some embodiments, the first component can be a mover component, and the second component can be a stator component. In other embodiments, the first component can be a stator component, and the second component can be a mover component.

[0070] In some embodiments, the first component includes a housing 312. The second component includes a center piece 311. The center piece 311 is movable relative to the housing 312 along an axial direction of an actuator 31. The axial direction of the actuator 31 is consistent with an axial direction of the housing 312.

[0071] As shown in FIGS. 4 and 5, the center piece 311 is partially located in the housing 312 and is movable relative to the housing 312 along an axial direction of the housing 312. The center piece 311 can be a rod-shaped structure, a plate-shaped structure, or other irregular structures, which are not limited in the present disclosure.

[0072] As shown in FIGS. 2 and 3, a top cover 33 is connected to the center piece 311. For example, the top cover 33 is connected to a portion of the center piece 311 located outside the housing 312. The top cover 33 and the center piece 311 can be connected by welding, clamping, screwing, or other components, which are not limited in the present disclosure.

[0073] In some embodiments, the fork arm 32 is connected to the housing 312. For example, the fork arm 32 is connected to an end of the housing 312 opposite to the top cover 33. The fork arm 32 and the housing 312 can be connected by welding, clamping, screwing, or other components, which are not limited in the present disclosure.

[0074] By relative sliding of the housing 312 and the center piece 311, the top cover 33 and the fork arm 32 are moved relative to each other, 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 vehicle wheel 2.

[0075] In some embodiments, an elastic element 34 is arranged between the housing 312 and the top cover 33. For example, the elastic element 34 is in abutment with the housing 312 and the top cover 33, i.e., the elastic element 34 is in a compressed state under the clamping of the housing 312 and the top cover 33. The elastic element 34 can be connected to the housing 312 and the top cover 33, or not.

[0076] When the housing 312 and the center piece 311 slide relative to each other, the housing 312 and the top cover 33 also move relative to each other, so as to drive the elastic element 34 to stretch or contract, so as to adjust the buffering performance of the elastic element 34.

[0077] In some embodiments, as shown in FIG. 3, an outer peripheral wall surface of the housing 312 has a limiting portion 3121. For example, the limiting portion 3121 can be a support step, or a plurality of support protrusions arranged at intervals along the peripheral direction of the housing 312.

[0078] As shown in FIG. 2, the suspension 3 further comprises a support 35. The support 35 is located on the side of the top cover 33 facing the shell 312, and is connected with the top cover 33. It should be noted that the support 35 can be in abutment with the top cover 33, or can be connected with the top cover 33 by clamping, screwing or the like. In some embodiments, the support 35 is annular, and the central part 311 is arranged in the support 35.

[0079] The elastic element 34 is arranged between the support 35 and the limiting part 3121. For example, the elastic element 34 is in abutment with the support 35 and the limiting part 3121, respectively. It should be noted that the elastic element 34 can be a cylindrical elastic element made of an elastic material such as rubber material or latex material, at this time, the elastic element 34 can be sleeved on the outside of the shell 312. The elastic element 34 can also include a plurality of elastic columns made of an elastic material such as rubber material or latex material, at this time, the plurality of elastic columns are arranged in a circumferential direction of the shell 312. For example, the elastic element 34 can be a spring, and the spring is sleeved on the outside of the shell 312.

[0080] The structure of the actuator 31 will be described in detail below.

[0081] In some embodiments, as shown in FIG. 5, in order to facilitate the relative sliding of the shell 312 and the central part 311, the actuator 31 further comprises a driving assembly 313. The driving assembly 313 is arranged between the part of the central part 311 located in the shell 312 and the shell 312, and is configured to drive the shell 312 to move relative to the central part 311 in the axial direction of the shell 312.

[0082] In some embodiments, the driving assembly 313 can be a piezoelectric ceramic driver.

[0083] In another embodiment, as shown in FIG. 6, the driving assembly 313 includes at least one electromagnetic coil 3131 and at least one magnetic part 3132. One of the electromagnetic coil 3131 and the magnetic part 3132 is connected in the shell 312, and the other of the electromagnetic coil 3131 and the magnetic part 3132 is connected to the central part 311. That is, if the electromagnetic coil 3131 is connected to the shell 312, the magnetic part 3132 is connected to the central part 311, at this time, the electromagnetic coil 3131 and the shell 312 form a first assembly, and the magnetic part 3132 and the central part 311 form a second assembly. If the electromagnetic coil 3131 is connected to the central part 311, the magnetic part 3132 is connected to the shell 312, at this time, the electromagnetic coil 3131 and the central part 311 form a second assembly, and the magnetic part 3132 and the shell 312 form a first assembly.

[0084] In this embodiment, the electromagnetic coil 3131 is connected to the center member 311, and the magnetic member 3132 is connected to the shell 312. For example, the center member 311 is a rod-shaped structure, and the outer circumferential surface of the center member 311 is provided with a core 314, which is annular, and the center member 311 is arranged in the core 314 and fixedly connected to the core 314. The outer circumferential surface of the core 314 is provided with a coil groove, and the electromagnetic coil 3131 is arranged in the coil groove and wound around the core 314 along the circumferential direction of the core 314.

[0085] The magnetic member 3132 is fixed to the inner wall surface of the shell 312. In this way, when the electromagnetic coil 3131 is energized, a magnetic field is generated between the electromagnetic coil 3131 and the magnetic member 3132, and the direction of the Lorentz force of the magnetic field is along the axial direction of the shell 312, so that the interaction force between the center member 311 and the shell 312 along the axial direction of the shell 312 is generated, thereby driving the center member 311 and the shell 312 to move relative to each other along the axial direction of the shell 312. Moreover, the actuator 31 can control the direction of the interaction force between the center member 311 and the shell 312 by changing the flow direction of the current in the electromagnetic coil 3131.

[0086] In some embodiments, the magnetic member 3132 can be a permanent magnet, an electromagnet, an energized coil, etc.

[0087] In some embodiments, the magnetic member 3132 is an annular structure. At this time, the center member 311, the core 314, and the electromagnetic coil 3131 are all arranged in the magnetic member 3132.

[0088] In some embodiments, the at least one electromagnetic coil 3131 includes a plurality of electromagnetic coils 3131 arranged in the axial direction of the shell 312. The at least one magnetic member 3132 also includes a plurality of magnetic members 3132 arranged in the axial direction of the shell 312.

[0089] It should be noted that the electromagnetic coil 3131 and the core 314 form a whole, and the outer circumferential surface of the whole has a gap with the inner circumferential surface of the magnetic member 3132, for example, the gap between the outer circumferential surface of the whole and the inner circumferential surface of the magnetic member 3132 can be greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0090] In some embodiments, as shown in FIG. 7, the shell 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 arranged in a spaced apart manner, and the thickness direction of the top wall 3122 is consistent with the thickness direction of the bottom wall 3123. 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 shell 312.

[0091] In order to facilitate the part of the center piece 311 to be located in the shell 312 and to slide relative to the shell 312, the top wall 3122 is provided with a mounting hole 3122A, as shown in FIG. 7. The mounting hole 3122A is in communication with the internal space of the shell 312. The center piece 311 is arranged in the mounting hole 3122A, and the part of the center piece 311 is located in the shell 312. In this way, the center piece 311 can extend into the internal space of the shell 312 through the mounting hole 3122A, so that the part of the center piece 311 is located in the shell 312.

[0092] In some embodiments, the center piece 311 is in sliding connection with the mounting hole 3122A. In this way, when the center piece 311 moves relative to the shell 312, the mounting hole 3122A can limit the center piece 311 and the shell 312 to avoid the center piece 311 and the shell 312 from shaking or deviating.

[0093] In order to make the center piece 311 slide more smoothly in the mounting hole 3122A, the actuator 31 further includes a first sliding bearing 315, as shown in FIG. 8. The first sliding bearing 315 is arranged in the mounting hole 3122A and is in interference fit with the top wall 3122. The center piece 311 is arranged in the first sliding bearing 315 and is in sliding connection with the first sliding bearing 315.

[0094] It should be noted that the inner circumferential surface of the first sliding bearing 315 is usually provided with a lubricating coating or is provided with lubricants such as water and oil, so as to reduce the friction between the first sliding bearing 315 and the center piece 311, so that the relative sliding between the center piece 311 and the shell 312 is more smooth.

[0095] In addition, the first sliding bearing 315 is usually made of metal materials such as bearing alloy, bronze, aluminum-based alloy, zinc-based alloy, or plastic materials such as phenolic plastic, nylon, and polytetrafluoroethylene. The above-mentioned materials have strong hardness, and therefore have good compressive strength and wear resistance, so as to reduce the wear between the center piece 311 and the first sliding bearing 315 and improve the service life during the sliding of the center piece 311 and the first sliding bearing 315.

[0096] In addition, the first sliding bearing 315 and the top wall 3122 are connected by interference fit, which is convenient to connect, and compared with bolt connection, the sliding bearing can avoid being provided with a hole, so as to ensure the structural strength of the sliding bearing.

[0097] In some embodiments, in order to avoid the phenomenon that the first sliding bearing 315 slides relative to the shell 312 in the direction away from the top cover 33 along the axial direction of the shell 312 during use, thereby affecting the stability of the relative sliding between the center piece 311 and the shell 312, as shown in FIGS. 9, 10 and 11, the connection relationship between the first sliding bearing 315 and the top wall 3122 is shown in FIG. 10.

[0098] The inner wall of the shell 312 is provided with a limiting boss 3125. For example, the limiting boss 3125 can be provided on the inner wall surface of the peripheral wall plate 3124, or on the inner wall surface of the top wall 3122.

[0099] The limiting boss 3125 is located on the side of the first sliding bearing 315 away from the top cover 33, and is configured to limit the first sliding bearing 315. For example, the limiting boss 3125 can be in contact with the first sliding bearing 315, thereby limiting the sliding of the first sliding bearing 315 relative to the shell 312 in the direction away from the top cover 33 along the axial direction of the shell 312, so as to improve the stability of the first sliding bearing 315 in the mounting hole 3122A.

[0100] In some embodiments, the limiting boss 3125 can be a ring structure around the axis of the shell 312, or a plurality of protrusions arranged along the circumferential direction of the mounting hole 3122A.

[0101] In order to avoid the limiting boss 3125 affecting the sliding connection between the center piece 311 and the first sliding bearing 315, as shown in FIG. 11, the equivalent inner diameter (such as the diameter R1 shown in FIG. 11) of the limiting boss 3125 is greater than the equivalent inner diameter (such as the diameter R2 shown in FIG. 11) of the first sliding bearing 315. In this way, when the center piece 311 and the first sliding bearing 315 slide relative to each other, the center piece 311 can be prevented from contacting the limiting boss 3125, thereby preventing the limiting boss 3125 from affecting the relative sliding between the center piece 311 and the first sliding bearing 315, and preventing the limiting boss 3125 from causing wear to the center piece 311.

[0102] It should be noted that the limiting boss 3125 can be a circular ring structure, for example, an elliptical ring or an approximately circular ring, and the equivalent inner diameter refers to the inner diameter of the limiting boss 3125 when the limiting boss 3125 is equivalent to a circular ring structure.

[0103] In addition, in order to improve the limiting effect of the limiting boss 3125 on the first sliding bearing 315, as shown in FIG. 11, the distance (distance L1 shown in FIG. 11) between the inner circumferential surface of the limiting boss 3125 and the outer circumferential surface of the first sliding bearing 315 is greater than half of the thickness (thickness H shown in FIG. 11) of the first sliding bearing 315 in the radial direction. In this way, the contact area of the limiting boss 3125 and the first sliding bearing 315 can be ensured, thereby improving the limiting effect of the limiting boss 3125 on the first sliding bearing 315.

[0104] In some embodiments, in order to avoid the phenomenon that the first sliding bearing 315 slides along the axial direction of the shell 312 towards the top cover 33 during use, thereby affecting the stability of the relative sliding between the central part 311 and the shell 312, as shown in FIG. 11, a clamping groove 3126 is further formed on the inner wall surface of the shell 312. For example, the clamping groove 3126 is arranged on the inner wall surface of the top wall 3122.

[0105] The actuator 31 further comprises a clamping ring 316 clamped in the clamping groove 3126 and located on the side of the first sliding bearing 315 away from the limiting boss 3125, so as to limit the first sliding bearing 315. For example, the clamping ring 316 can be in contact with the side of the first sliding bearing 315 away from the limiting boss 3125, thereby limiting the sliding of the first sliding bearing 315 along the axial direction of the shell 312 towards the top cover 33, so as to improve the stability of the first sliding bearing 315 in the mounting hole 3122A.

[0106] In some embodiments, the clamping ring 316 can have a closed annular structure. The clamping groove 3126 can have an annular shape around the axis of the shell 312. The clamping groove 3126 can also be a plurality of grooves arranged at intervals along the circumferential direction of the shell 312, and the outer wall surface of the clamping ring 316 can be provided with a plurality of protrusions, one protrusion being clamped in one groove.

[0107] In other embodiments, as shown in FIG. 12, the clamping ring 316 is provided with an elastic notch 3161. For example, the elastic notch 3161 penetrates the clamping ring 316 along the axial direction of the clamping ring 316 and penetrates from the inner wall surface of the clamping ring 316 to the outer wall surface of the clamping ring 316, i.e., the clamping ring 316 is a non-closed structure. In this way, the clamping ring 316 can be pressed at the elastic notch 3161, so that the clamping ring 316 is deformed, and the outer diameter of the deformed clamping ring 316 is smaller than the inner diameter of the mounting hole 3122A, so as to facilitate the clamping ring 316 to be put into the mounting hole 3122A and aligned with the clamping groove 3126, and then the pressing on the clamping ring 316 is released, and the clamping ring 316 is reset under the elastic force, thereby being clamped into the clamping groove 3126.

[0108] To facilitate the extrusion of the clamping ring 316, the portions of the clamping ring 316 located on both sides of the elastic notch 3161 are respectively provided with a first clamping notch 3162 and a second clamping notch 3163. For example, the first clamping notch 3162 and the second clamping notch 3163 can be provided on the outer wall surface of the clamping ring 316, or can be provided on the inner wall surface of the clamping ring 316. In this way, the first clamping notch 3162 and the second clamping notch 3163 can be clamped by an external tool such as a clamp, and then force can be applied to the portion of the clamping ring 316 located at the first clamping notch 3162 in the direction from the first clamping notch 3162 towards the second clamping notch 3163, and force can be applied to the portion of the clamping ring 316 located at the second clamping notch 3163 in the direction from the second clamping notch 3163 towards the first clamping notch 3162, so as to deform the clamping ring 316.

[0109] On this basis, as shown in FIG. 12, the first clamping notch 3162 includes opposite first and second ends 3162A and 3162B, the first end 3162A penetrates through the clamping ring 316, and the second end 3162B is closer to the second clamping notch 3163 than the first end 3162A. In this way, the first clamping notch 3162 is inclined in a direction gradually away from the second clamping notch 3163 from the second end 3162B towards the first end 3162A, so that when the external tool is clamped into the first clamping notch 3162 and extrudes the clamping ring 316, the inner side surface of the first clamping notch 3162 close to the second clamping notch 3163 can limit the external tool, so as to avoid the external tool from being taken out of the first clamping notch 3162, thereby improving the stability when the clamping ring 316 is extruded.

[0110] The second clamping notch 3163 includes opposite third and fourth ends 3163A and 3163B, the third end 3163A penetrates through the clamping ring 316, and the fourth end 3163B is closer to the first clamping notch 3162 than the third end 3163A. In this way, the second clamping notch 3163 is inclined in a direction gradually away from the first clamping notch 3162 from the fourth end 3163B towards the third end 3163A, so that when the external tool is clamped into the second clamping notch 3163 and extrudes the clamping ring 316, the inner side surface of the second clamping notch close to the first clamping notch 3162 can limit the external tool, so as to avoid the external tool from being taken out of the second clamping notch 3163, thereby improving the stability when the clamping ring 316 is extruded.

[0111] In some embodiments, in order to avoid the effect of the snap ring 316 on the sliding connection between the center piece 311 and the first sliding bearing 315, as shown in FIG. 11, the equivalent inner diameter (diameter R3 as shown in FIG. 11) of the snap ring 316 is greater than the equivalent inner diameter (diameter R2 as shown in FIG. 11) of the first sliding bearing 315. In this way, when the center piece 311 slides relative to the first sliding bearing 315, the center piece 311 can be prevented from contacting the snap ring 316, thereby avoiding the effect of the snap ring 316 on the relative sliding of the center piece 311 and the first sliding bearing 315, and the snap ring 316 can be prevented from causing wear to the center piece 311.

[0112] It should be noted that the snap ring 316 can have a circular ring structure, for example, an elliptical ring or an approximately circular ring, and the equivalent inner diameter refers to the inner diameter of the snap ring 316 when it is equivalent to a circular ring structure.

[0113] In addition, in order to improve the limiting effect of the snap ring 316 on the first sliding bearing 315, as shown in FIG. 11, the distance (distance L2 as shown in FIG. 11) between the inner circumferential surface of the snap ring 316 and the outer circumferential surface of the first sliding bearing 315 is greater than half the thickness (thickness H as shown in FIG. 11) of the first sliding bearing 315 in the radial direction. In this way, the contact area between the snap ring 316 and the first sliding bearing 315 can be ensured, thereby improving the limiting effect of the snap ring 316 on the first sliding bearing 315.

[0114] By the snap ring 316 and the limiting boss 3125, the first sliding bearing 315 is limited from both sides in the axial direction of the housing 312, which can prevent the first sliding bearing 315 from moving in the axial direction of the housing 312, thereby ensuring the stability of the relative sliding between the center piece 311 and the first sliding bearing 315.

[0115] In some embodiments, in order to avoid the influence of dust, water, oil and other impurities from the outside on the relative sliding between the center piece 311 and the first sliding bearing 315, as shown in FIG. 11, the actuator 31 further comprises a sealing support 317 and a sealing assembly 31A. The sealing support 317 is arranged on the housing 312.

[0116] In some embodiments, the sealing support 317 is arranged on the outside of the housing 312 and detachably connected with the top wall 3122 of the housing 312. For example, the sealing support 317 can be connected with the top wall 3122 by screwing, clamping or the like. The sealing support 317 is configured to fix the sealing assembly 31A on the housing. By detachably connecting the sealing support 317 with the top wall 3122 of the housing 312, the sealing support 317 and the housing 312 can be easily detached and installed, thereby facilitating the detachment and installation of the sealing assembly 31A.

[0117] In some embodiments, a sealing assembly 31A is arranged between the sealing support 317 and the center piece 311, and is configured to seal the shell 312 and the center piece 311. For example, the sealing support 317 is provided with a through hole 3171, and the center piece 311 is arranged in the through hole 3171. The center piece 311 and the inner wall of the through hole 3171 have a gap therebetween, and the sealing assembly 31A is arranged in the through hole 3171 and in contact with the inner wall of the through hole 3171 and the center piece 311, so as to seal the gap between the inner wall of the through hole 3171 and the center piece 311.

[0118] By arranging the sealing support 317 on the shell 312 and arranging the sealing assembly 31A between the sealing support 317 and the center piece 311, the gap between the shell 312 and the center piece 311 can be sealed. In this way, under the sealing effect of the sealing assembly 31A, foreign matter from the outside can be prevented from entering the mounting hole 3122A, and thus the relative movement of the center piece 311 and the shell 312 can be prevented from being affected by foreign matter from the outside, thereby improving the reliability of the suspension 3.

[0119] In some embodiments, part of the sealing assembly 31A is arranged between the top wall 3122 and the sealing support 317. In this way, the sealing support 317 and the top wall 3122 can clamp the sealing assembly 31A from both sides of the sealing assembly 31A, so as to fix the sealing assembly 31A on the shell 312. In this way, the sealing assembly 31A can be installed from the outside of the shell 312, so that the installation of the sealing assembly 31A is not limited by space.

[0120] As shown in FIG. 8, the sealing assembly 31A is arranged around the center piece 311 and in contact with the center piece 311. In this way, the part of the sealing assembly 31A between the sealing support 317 and the top wall 3122 can not only seal the gap between the sealing support 317 and the top wall 3122, but also seal the gaps between the center piece 311 and the top wall 3122 and between the center piece 311 and the sealing support 317, so as to prevent foreign matter from the outside from entering the mounting hole 3122A of the top wall 3122, and thus prevent the relative sliding of the center piece 311 and the shell 312 from being affected by foreign matter from the outside, thereby improving the reliability of the suspension 3.

[0121] It can be understood that, since the first sliding bearing 315 is arranged in the mounting hole 3122A, the sealing assembly 31A can be located on the side of the first sliding bearing 315 close to the top cover 33, for example, the sealing assembly 31A is located on the side of the clasp 316 away from the first sliding bearing 315. In this way, after the sealing assembly 31A seals the gap between the center piece 311 and the top wall 3122 and the gap between the center piece 311 and the sealing support 317, impurities from the outside can be prevented from entering the mounting hole 3122A, so as to prevent impurities from the outside from entering between the first sliding bearing 315 and the center piece 311, so as to avoid affecting the relative sliding of the center piece 311 and the first sliding bearing 315.

[0122] In some embodiments, the sealing assembly 31A can include a sealing piece 318 and a pressing piece 318A. A portion of the sealing piece 318 is arranged between the top wall 3122 and the sealing support 317, the sealing piece 318 is arranged around the center piece 311 and is in contact with the center piece 311. The sealing piece 318 can seal the gap between the sealing support 317 and the top wall 3122 and the gap between the housing 312 and the center piece 311.

[0123] The pressing piece 318A can be arranged between the sealing support 317 and the portion of the sealing piece 318 located between the top wall 3122 and the sealing support 317. The sealing support 317 presses the sealing piece 318 against the top wall 3122 through the pressing piece 318A, so as to fix the sealing piece 318. In this way, the pressing piece 318A can press the sealing piece 318 more tightly, so as to improve the sealing effect of the sealing piece 318.

[0124] In some embodiments, as shown in FIG. 13, the sealing piece 318 includes an annular sealing portion 3181 and a supporting portion 3182. The inner circumferential surface of the annular sealing portion 3181 is in contact with the center piece 311. For example, the center piece 311 is arranged through the annular sealing portion 3181 and abuts against the inner wall surface of the annular sealing portion 3181.

[0125] The supporting portion 3182 is connected to the outer circumferential surface of the annular sealing portion 3181 and is arranged around the annular sealing portion 3181. The supporting portion 3182 is arranged between the top wall 3122 and the sealing support 317. For example, the supporting portion 3182 can surround the annular sealing portion 3181. Through the arrangement of the annular sealing portion 3181 and the supporting portion 3182, the sealing piece 318 can be fixed by the sealing support 317.

[0126] In addition, the sealing piece 318 can also have a cylindrical, elliptical cylindrical or irregular cylindrical structure, or a circular, elliptical or irregular annular sheet structure.

[0127] In some embodiments, the pressing piece 318A is arranged between the support portion 3182 and the top wall 3122. The pressing piece 318A can press the support portion 3182 against the top wall 3122, thereby improving the sealing effect of the support portion 3182 on the gap between the sealing support 317 and the top wall 3122.

[0128] In some embodiments, the pressing piece 318A is arranged around the annular sealing portion 3181. For example, the pressing piece 318A can surround the annular sealing portion 3181. In this way, the contact area of the pressing piece 318A with the support portion 3182 is increased, thereby improving the pressing effect on the support portion 3182 and improving the sealing effect of the support portion 3182.

[0129] In some embodiments, the support portion 3182 can have a sheet structure. In other embodiments, the radial cross section of the support portion 3182 can be square, circular, elliptical, etc., which passes through the axis of the support portion 3182.

[0130] In some embodiments, the annular sealing portion 3181 can be located on one side of the support portion 3182 in the axial direction of the housing 312. At this time, part of the annular sealing portion 3181 can also be located on the inner side of the support portion 3182.

[0131] In other embodiments, as shown in FIG. 14, the annular sealing portion 3181 has a first sealing end 3181A and a second sealing end 3181B at both ends in the axial direction. The support portion 3182 is located between the first sealing end 3181A and the second sealing end 3181B in the axial direction of the annular sealing portion 3181. That is, the annular sealing portion 3181 extends to both sides of the support portion 3182 in the axial direction of the annular sealing portion 3181. In this way, the structural strength of the sealing member 318 can be improved, and when the central member 311 slides relative to the sealing member 318, the support portion 3182 has part of the annular sealing portion 3181 on both sides in the axial direction of the sealing member 318. rubs with the central member 311, thereby reducing the large axial movement of the annular sealing portion 3181 and improving the sealing effect.

[0132] In some embodiments, part of the annular sealing portion 3181 is located in the mounting hole 3122A and in contact with the inner wall of the mounting hole 3122A. In this way, the gap between the central member 311 and the inner wall of the mounting hole 3122A can be sealed to improve the sealing effect.

[0133] In some embodiments, as shown in FIG. 15, in the case where the annular sealing portion 3181 is in a free state (i.e. the state when the sealing member 318 is not installed on the shell 312), the spacing (the spacing L3 shown in FIG. 15) between the inner circumferential surface of the annular sealing portion 3181 and the axis of the annular sealing portion 3181 (the vertical dashed line shown in FIG. 15) increases first and then decreases along the axial direction of the annular sealing portion 3181. That is, the inner edge line of the radial cross section of the annular sealing portion 3181 is an arc line, and the concave side of the arc line faces the axis of the annular sealing portion 3181. Alternatively, the inner edge line of the radial cross section of the annular sealing portion 3181 is two intersecting line segments, and the angle formed by the two line segments after intersection faces the axis of the annular sealing portion 3181. The radial cross section of the annular sealing portion 3181 passes through the axis of the annular sealing portion 3181.

[0134] By setting the spacing between the inner circumferential surface of the annular sealing portion 3181 and the axis of the annular sealing portion 3181 to increase first and then decrease, when the annular sealing portion 3181 abuts against the central member 311, the annular sealing portion 3181 is more likely to deform, so that the annular sealing portion 3181 can be more closely fitted with the central member 311, so as to improve the sealing effect of the annular sealing portion 3181.

[0135] In some embodiments, as shown in FIG. 16, the sealing support 317 includes a main body portion 3172 and a connecting portion 3173. The main body portion 3172 is located on the side of the support portion 3182 away from the top wall 3122. The main body portion 3172 is in surface contact with the side of the support portion 3182 away from the top wall 3122, so as to clamp the support portion 3182 from both sides by the main body portion 3172 and the top wall 3122, to fix the support portion 3182 on the shell 312.

[0136] The connecting portion 3173 is connected with the main body portion 3172, and the connecting portion 3173 is connected with the shell 312. For example, the connecting portion 3173 is in a flange structure, and a plurality of bolt holes are arranged on the connecting portion 3173 in a circumferential direction of the sealing member 318, at this time, the connection between the connecting portion 3173 and the shell 312 can be achieved by screwing bolts through the bolt holes and screwing with the top wall 3122. Alternatively, the connecting portion 3173 can also be in a clamping structure, for example, the connecting portion 3173 is a clamping protrusion arranged around the main body portion 3172, at this time, the connection between the connecting portion 3173 and the shell 312 can be achieved by clamping the clamping protrusion in a clamping groove on the top wall 3122.

[0137] As shown in FIGS. 17 and 18, FIGS. 17 and 18 are views of the sealing support 317 and the sealing member 318 from the two sides in the axial direction of the sealing member 318, respectively.

[0138] The connecting portion 3173 is arranged around the supporting portion 3182. That is, the supporting portion 3182 is located at the inner side of the connecting portion 3173, and the annular sealing portion 3181 is located between the sealing bracket 317 and the center piece 311. In this way, the connecting portion 3173 can shield the supporting portion 3182, so that the sealing bracket 317 shields the sealing piece 318, thereby protecting the sealing piece 318 from being damaged due to external leakage. Moreover, the connecting portion 3173 can be directly connected with the top wall 3122 to reduce the gap between the sealing bracket 317 and the top wall 3122, thereby improving the appearance of the actuator 31.

[0139] In some embodiments, as shown in FIGS. 19 and 20, the connecting portion 3173 is located at the side of the main body portion 3172 facing the top wall 3122, and part of the connecting portion 3173 is located outside the main body portion 3172. The inner diameter of the connecting portion 3173 is larger than that of the main body portion 3172, so that the connecting portion 3173 and the main body portion 3172 form a stepped structure. In this way, the supporting portion 3182 of the sealing piece 318 can be located at the inner side of the connecting portion 3173, and the surface of the supporting portion 3182 facing away from the top wall 3122 can be in contact with the surface of the main body portion 3172 facing the top wall 3122. At this time, part of the annular sealing portion 3181 can be located inside the main body portion 3172, and the other part can be located inside the mounting hole 3122A, so that the sealing bracket 317 shields and protects the sealing piece 318.

[0140] In some embodiments, in order to facilitate the control of the relative displacement of the center piece 311 and the housing 312 after the relative movement, so as to more accurately adjust the distance between the wheel 2 and the vehicle body 1 and more accurately adjust the buffering performance of the elastic element 34, the actuator 31 usually has a position sensor 319 to detect the relative displacement of the center piece 311 and the housing 312 through the position sensor 319.

[0141] In some embodiments, the position sensor 319 can be a magnetic grating sensor. The magnetic grating sensor is a displacement measurement sensor that uses the magnetic action of a magnetic grating and a magnetic head. As shown in FIG. 21, the position sensor 319 includes a sensor read head 3191 and a magnetic grating ruler 3192. The magnetic grating ruler 3192 is connected to the center piece 311, and the sensor read head 3191 is connected to the sealing bracket 317. In this way, when the center piece 311 and the housing 312 move relatively, the sensor read head 3191 and the magnetic grating ruler 3192 also move relatively, so that the sensor read head 3191 can detect the change of the magnetic field strength on the magnetic grating ruler 3192, thereby detecting the position change of the magnetic grating ruler 3192 to determine the relative displacement of the center piece 311 and the housing 312.

[0142] In order to facilitate the installation of the sensor reading head 3191 on the sealing bracket 317, the main body 3172 is provided with an installation notch 3174, as shown in FIG. 16. As shown in FIGS. 20 and 21, the sensor reading head 3191 is arranged in the installation notch 3174 and connected to the main body 3172. By installing the sensor reading head 3191 in the installation notch 3174, the arrangement of the sensor reading head 3191 and the sealing bracket 317 can be more reasonable, and the sensor reading head 3191 can avoid occupying a large space.

[0143] In some embodiments, the sensor reading head 3191 can be connected to the installation notch 3174 by clamping or screwing.

[0144] In some embodiments, the actuator 31 further comprises a connecting line (i.e., a sensor connecting line), the sensor reading head 3191 is connected to the connecting line, and the connecting line is connected to the power supply of the vehicle 1000, so that the power supply supplies power to the sensor reading head 3191 through the connecting line, so as to facilitate the work of the sensor reading head 3191.

[0145] In order to avoid the scattering of the connecting line, as shown in FIG. 21, the sealing bracket 317 is provided with a first wire groove 3175, the housing 312 is provided with a second wire groove 3127, and the first wire groove 3175 and the second wire groove 3127 are in communication. The connecting line is arranged in the first wire groove 3175 and the second wire groove 3127. In this way, the connecting line can be accommodated in the first wire groove 3175 and the second wire groove 3127, so as to avoid the scattering of the connecting line and facilitate the replacement and maintenance of the connecting line. In addition, the first wire groove 3175 and the second wire groove 3127 can also protect the connecting line, so as to avoid the damage of the connecting line.

[0146] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An actuator (31), comprising: a first component and a second component relatively movable in an axial direction of the actuator (31); the first component comprises a housing (312), and the second component comprises a center piece (311), the center piece (311) being relatively movable with the housing (312) in the axial direction of the actuator (31); a seal support (317) provided on the housing (312); and a seal assembly (31A) provided between the seal support (317) and the center piece (311), the seal assembly (31A) being configured to achieve a seal between the housing (312) and the center piece (311).

2. The actuator (31) according to claim 1, wherein The seal support (317) is provided on an outer side of the housing (312) and detachably connected to a top wall (3122) of the housing (312).

3. The actuator (31) according to claim 2, wherein A part of the seal assembly (31A) is provided between the top wall (3122) and the seal support (317), the seal assembly (31A) being provided around and in contact with the center piece (311).

4. The actuator (31) according to claim 3, wherein The seal assembly (31A) comprises a seal member (318), the seal member (318) comprising: an annular seal portion (3181) having an inner circumferential surface in contact with the center piece (311); and a support portion (3182) connected to an outer circumferential surface of the annular seal portion (3181) and provided around the annular seal portion (3181), the support portion (3182) being provided between the top wall (3122) and the seal support (317).

5. The actuator (31) according to claim 4, wherein In a free state of the annular seal portion (3181), along an axial direction of the annular seal portion (3181), a distance between the inner circumferential surface of the annular seal portion (3181) and an axis of the annular seal portion (3181) first increases and then decreases.

6. The actuator (31) according to claim 4 or 5, wherein The annular seal portion (3181) has a first seal end (3181A) and a second seal end (3181B) at two axial ends thereof. Along the axial direction of the annular seal portion (3181), the support portion (3182) is located between the first seal end (3181A) and the second seal end (3181B).

7. The actuator (31) according to any one of claims 4-6, wherein, The seal assembly (31A) further comprises: a pressing plate (318A) provided between the support portion (3182) and the top wall (3122).

8. The actuator (31) according to claim 7, wherein The pressing plate (318A) is provided around the annular seal portion (3181).

9. The actuator (31) according to any one of claims 4-8, wherein, The seal support (317) comprises: a main body portion (3172) located on a side of the support portion (3182) opposite to the top wall (3122); and a connecting portion (3173) connected to the main body portion (3172) and provided around the support portion (3182), the connecting portion (3173) being connected to the housing (312).

10. The actuator (31) according to any one of claims 2-9, wherein, The top wall (3122) is provided with a mounting hole (3122A) in communication with the internal space of the shell (312); The center piece (311) is arranged in the mounting hole (3122A), and part of the center piece (311) is located in the shell (312).

11. The actuator (31) according to claim 10, further comprising a first sliding bearing (315) arranged in the mounting hole (3122A) and in interference fit with the top wall (3122); the center piece (311) is arranged in the first sliding bearing (315) and in sliding connection with the first sliding bearing (315).

12. The actuator (31) according to claim 11, wherein An inner wall surface of the shell (312) is provided with a limiting boss (3125) located on a side of the first sliding bearing (315) away from the sealing assembly (31A) to limit the first sliding bearing (315).

13. The actuator (31) according to claim 12, wherein The limiting boss (3125) surrounds the axis of the shell (312).

14. The actuator (31) according to claim 13, wherein An equivalent inner diameter of the limiting boss (3125) is greater than an equivalent inner diameter of the first sliding bearing (315).

15. The actuator (31) according to claim 13 or 14, wherein A distance between an inner circumferential surface of the limiting boss (3125) and an outer circumferential surface of the first sliding bearing (315) is greater than half of a thickness of the first sliding bearing (315) in the radial direction.

16. The actuator (31) according to any one of claims 11-15, wherein, An inner wall surface of the shell (312) is further formed with a clamping groove (3126); The actuator (31) further comprises a clamping ring (316) clamped in the clamping groove (3126) and located between the first sliding bearing (315) and the sealing assembly (31A) to limit the first sliding bearing (315).

17. The actuator (31) of claim 16, wherein An equivalent inner diameter of the clamping ring (316) is greater than an equivalent inner diameter of the first sliding bearing (315).

18. The actuator (31) according to claim 16 or 17, wherein A distance between an inner circumferential surface of the clamping ring (316) and an outer circumferential surface of the first sliding bearing (315) is greater than half of a thickness of the first sliding bearing (315) in the radial direction.

19. The actuator (31) according to any one of claims 16-18, wherein, The clamping ring (316) is provided with an elastic notch (3161), and parts of the clamping ring (316) located on two sides of the elastic notch (3161) are respectively provided with a first clamping notch (3162) and a second clamping notch (3163).

20. The actuator (31) of claim 19, wherein The first clamping notch (3162) comprises opposite first and second ends (3162A, 3162B), the first end (3162A) penetrates the clamping ring (316), and the second end (3162B) is closer to the second clamping notch (3163) than the first end (3162A). The second clamping notch (3163) comprises opposite third and fourth ends (3163A, 3163B), the third end (3163A) penetrates the clamping ring (316), and the fourth end (3163B) is closer to the first clamping notch (3162) than the third end (3163A).

21. The actuator (31) according to any one of claims 9-20, wherein, The main body part (3172) is provided with a mounting gap (3174); The actuator (31) further comprises a sensor reading head (3191) and a magnetic scale (3192), the magnetic scale (3192) is connected to the center piece (311), the sensor reading head (3191) is arranged in the mounting gap (3174) and is connected to the main body part (3172), and the sensor reading head (3191) is configured to detect the change of the magnetic field intensity of the magnetic scale (3192).

22. The actuator (31) of claim 21, wherein The sealing bracket (317) is provided with a first wire slot (3175), and the shell (312) is provided with a second wire slot (3127), and the first wire slot (3175) and the second wire slot (3127) are in communication; The actuator (31) further comprises a sensor connecting wire, which is connected with the sensor reading head (3191) and arranged in the first wire slot (3175) and the second wire slot (3127).

23. The actuator (31) according to any one of claims 1-22, further comprising a driving assembly (313) arranged between the portion of the center piece (311) located in the shell (312) and the shell (312) and configured to drive the shell (312) to move relative to the center piece (311) along the axial direction of the actuator (31).

24. The actuator (31) of claim 23, wherein The driving assembly (313) comprises an electromagnetic coil (3131) and a magnetic piece (3132), one of the electromagnetic coil (3131) and the magnetic piece (3132) is connected in the shell (312) and forms the first assembly together with the shell (312), and the other of the electromagnetic coil (3131) and the magnetic piece (3132) is connected to the center piece (311) and forms the second assembly together with the center piece (311).

25. A suspension (3), comprising: The actuator (31) according to any one of claims 1-24; a fork arm (32) connected with the shell (312); a top cover (33) connected with the center piece (311); and a resilient element (34) arranged between the shell (312) and the top cover (33).

26. A vehicle (1000), comprising: The suspension (3) according to claim 25; a vehicle body (1) connected with one of the fork arm (32) and the top cover (33); and a wheel (2) arranged below the vehicle body (1) and connected with the other of the fork arm (32) and the top cover (33). ​

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