CN117662677A

CN117662677A - Shock absorber and vehicle with same

Info

Publication number: CN117662677A
Application number: CN202310639128.1A
Authority: CN
Inventors: 廖银生; 孙宪猛; 卢艺; 张秀和; 李豪
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2024-03-08

Abstract

The invention discloses a shock absorber and a vehicle with the shock absorber, the shock absorber comprises a stator assembly, a rotor assembly and a displacement detection assembly, the rotor assembly and the stator assembly are movably matched along a preset direction, the displacement detection assembly comprises a first matching piece and a second matching piece, the first matching piece is fixedly arranged on a stator body, the second matching piece is fixedly arranged on the rotor assembly, a first gap is formed between the stator body and the rotor assembly in the direction of moving matching of the stator assembly and the rotor assembly, and at least part of the first matching piece and at least part of the second matching piece are positioned in the first gap. According to the shock absorber disclosed by the invention, the displacement detection assembly is convenient to set, and the thrust of the shock absorber is not influenced.

Description

Shock absorber and vehicle with same

Technical Field

The invention relates to the technical field of vibration reduction, in particular to a vibration absorber and a vehicle with the same.

Background

The damper includes a stator assembly and a mover assembly, and a displacement detection assembly is typically provided in the damper to obtain displacement of the mover assembly relative to the stator assembly. In the related art, the displacement detection assembly is not properly designed, so that the displacement detection assembly occupies the arrangement space of the stator assembly and the rotor assembly of the shock absorber, the arrangement of the stator assembly and the rotor assembly is influenced, and the thrust of the shock absorber is influenced.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the shock absorber, which is convenient for the displacement detection assembly to be arranged, and does not influence the thrust of the shock absorber.

The invention further provides a vehicle with the shock absorber.

An embodiment of a shock absorber according to a first aspect of the present invention includes: a stator assembly adapted to be connected to one of a vehicle body and a wheel, the stator assembly including a stator body and a stator coil provided to the stator body; a mover assembly adapted to be connected to the other one of the vehicle body and the wheel, and movably engaged with the stator assembly in a preset direction, the mover assembly including a mover magnet steel; the displacement detection assembly comprises a first matching piece and a second matching piece, the second matching piece is matched with the first matching piece so that the displacement detection assembly is used for detecting displacement of the rotor assembly relative to the stator assembly, the first matching piece is fixedly arranged on the stator body, the second matching piece is fixedly arranged on the rotor assembly in the preset direction, a first gap is reserved between the stator body and the rotor assembly, and at least part of structures of the first matching piece and the second matching piece are located in the first gap.

According to the damper provided by the embodiment of the invention, the first gap is formed between the stator body and the rotor assembly, and at least part of structures of the first matching piece and the second matching piece are arranged in the first gap, so that the first matching piece and/or the second matching piece can utilize the space of the first gap, the arrangement of the first matching piece or the second matching piece is more reasonable, the arrangement space of the damper in the direction in which the stator assembly and the rotor assembly are in movable fit is reasonably utilized, the excessive occupation of the size space of the damper in the direction of the preset direction due to the arrangement of the first matching piece and the second matching piece is avoided, the arrangement of the first matching piece and/or the second matching piece is more reasonable, the waste of the space of the damper is avoided, the space utilization rate of the damper is improved, the influence of the arrangement of the second matching piece on the stator coil and the rotor magnetic steel is reduced, and the damper has enough thrust.

In some embodiments, in a direction perpendicular to the preset direction, a second gap is formed between the stator body and the mover assembly, at least part of the structure of one of the first mating member and the second mating member is located in the first gap, and at least part of the structure of the other is located in the second gap.

In some embodiments, the rotor assembly further comprises a rotor body, the rotor body defines a polygonal structure or a cylindrical structure, the rotor magnetic steel is arranged on the inner peripheral wall of the rotor body, and at least part of the stator assembly is arranged in the rotor body; in a preset direction, an end face, close to the bottom wall of the rotor body, of the stator assembly is arranged at intervals with the bottom wall of the rotor body to form the first gap, and an end face, close to the bottom wall of the rotor body, of the stator assembly is provided with a mounting face of the first matching piece.

In some embodiments, the shock absorber further comprises: the first buffer piece is arranged on the bottom wall of the rotor body, the end face, close to the bottom wall of the rotor body, of the stator body is provided with a first part and a second part, the first part is suitable for being in contact with the first buffer piece to limit the movement of the rotor assembly, and the second part is formed to be a mounting surface of the first matching piece; in the preset direction, the distance between the first part and the first buffer piece is smaller than or equal to the distance between the first matching piece and the bottom wall of the corresponding rotor body.

In some embodiments, the bottom wall of the first buffer member or the mover body is formed with an avoidance groove, and in a preset direction, the projection of the first mating member is located in the avoidance groove, and a distance between the bottom wall of the avoidance groove and the first mating member is greater than or equal to a distance between the first buffer member and the first portion.

In some embodiments, the stator assembly includes a first guide and the mover assembly includes a second guide, the first guide cooperatively disposed with the second guide to move the mover assembly along a predetermined trajectory relative to the stator assembly; the first matching piece is arranged on the first guide piece, the second matching piece is arranged on the second guide piece, and a second gap is formed between part of the second guide piece and part of the first guide piece in the direction perpendicular to the preset direction.

In some embodiments, the mover body is provided with a first guide post, the first guide post is configured as the second guide member, the stator body is formed with a first guide hole, the first guide hole is configured as the first guide member, the first guide post is accommodated in the first guide hole, the first guide post includes a contact portion and a non-contact portion, the contact portion moves along a side wall of the first guide hole, and the non-contact portion is spaced from the first guide hole to form the second gap.

In some embodiments, the first guide post is provided with a first mounting groove to form the non-contact portion, a groove wall of a side of the first mounting groove away from the guide hole forms a second mounting surface, and the second mating member is disposed on the second mounting surface.

In some embodiments, the mover body has a first opening, and at least a portion of the stator assembly is adapted to be exposed from the first opening to the mover body.

In some embodiments, the damper further comprises a first mount fixed with the stator assembly, a second mount fixed with the mover assembly, and a damper spring stopped between the first mount and the second mount.

In some embodiments, the shock absorber further comprises a guard that covers the outside of the damping spring and is fixed with the first mount.

In some embodiments, the shock absorber further comprises: the second buffer piece is arranged at one side of the bottom end of the protection piece facing the second installation seat. .

In some embodiments, the displacement detection assembly further has a connection wire electrically connected to the first mating member, and the stator body is formed with a first routing channel extending to an end of the stator body remote from the mover magnetic steel.

In some embodiments, the stator body includes a first body portion and a second body portion, the stator coil is disposed on the first body portion, at least a portion of the second body portion is adapted to be located outside the mover assembly and is formed with a vehicle body connection end, the first routing channel includes a first channel segment and a second channel segment disposed in communication, the first channel segment is formed on the first body portion, and the second channel segment is formed on the second body portion.

In some embodiments, the minimum distance of the first channel segment from the central axis of the mover assembly is greater than the minimum distance of the second channel segment from the central axis of the mover assembly.

In some embodiments, the first channel segment is between the first guide and the stator coil.

In some embodiments, the displacement detection assembly further has a connection wire electrically connected to the second mating member, and the sub-assembly is formed with a second routing channel extending to an end of the sub-assembly facing away from the stator assembly.

In some embodiments, the first mating member is a sensor body and the second mating member is a sensor grating or a sensor magnetic stripe.

A vehicle according to an embodiment of a second aspect of the present invention includes a vehicle body, a wheel, and a damper according to the embodiment of the first aspect of the present invention, the stator assembly is connected to one of the vehicle body and the wheel, and the mover assembly is connected to the other of the vehicle body and the wheel.

According to the vehicle provided by the embodiment of the invention, the shock absorber is adopted, so that the comfort of the vehicle is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of a shock absorber according to some embodiments of the present invention;

FIG. 2 is a cross-sectional view of the shock absorber shown in FIG. 1;

FIG. 3 is an enlarged view of portion A, circled in FIG. 2;

FIG. 4 is a cross-sectional view of a shock absorber according to further embodiments of the present invention;

fig. 5 is an enlarged view of a portion B circled in fig. 4.

Reference numerals:

damper 100, first support 10a, second support 10b, first gap 10c, second gap 10d,

Stator assembly 1, stator body 11, first routing channel 11a, first channel segment 11b, second channel segment 11c, second guide post 11d, second opening 11e, second mounting groove 11f, first mounting surface 11g, fifth mounting surface 11h, sixth mounting surface 11j, first portion 11k, second portion 11n, first body portion 111, second body portion 112, stator coil 12, first guide hole 13,

Mover assembly 2, mover magnet steel 21, second guide hole 21a, fourth mounting surface 21b, annular permanent magnet 211, mover body 22, first opening 22a, third mounting surface 22b, first guide post 23, second mounting surface 23a, first post segment 231, first mounting recess 231a, second post segment 232, third mounting surface,

A displacement detecting unit 3, a first fitting member 31, a second fitting member 32, a connecting line 33,

A first buffer member 4a, a second buffer member 4b, a relief groove 4c,

A first mounting seat 5, a second mounting seat 6, a damping spring 7 and a protecting piece 9.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

Hereinafter, a shock absorber 100 according to an embodiment of the present invention is described with reference to the accompanying drawings.

As shown in fig. 2 and 4, the shock absorber 100 includes a stator assembly 1 and a mover assembly 2, the stator assembly 1 is adapted to be connected to one of a vehicle body and a wheel, and the stator assembly 1 includes a stator body 11 and a stator coil 12 provided to the stator body 11; the mover assembly 2 is adapted to be connected to the other of the vehicle body and the vehicle wheel, and the mover assembly 2 is movably engaged with the stator assembly 1 in a predetermined direction, the mover assembly 2 including the mover magnet steel 21.

The stator coil 12 generates a magnetic field after being electrified, the movement direction of the magnetic field is the axial direction of the stator body 11, and the magnetic field formed by the electrified stator coil 12 interacts with the magnetic field of the rotor magnetic steel 21 to generate acting force, so that the rotor assembly 2 has a trend of moving along a preset direction relative to the stator assembly 1, namely, the rotor assembly is formed into thrust or damping of the shock absorber 100, so that the height of a vehicle body relative to wheels is changed to realize the adjustment of the posture of the whole vehicle body, and the vehicle is convenient to ensure that the vehicle runs in a proper posture.

For example, the stator assembly 1 is directly or indirectly connected to the vehicle body, and the mover assembly 2 is directly or indirectly connected to the vehicle wheel, in which case a portion of the stator assembly 1 may be located on the upper side of the mover assembly 2; or the stator assembly 1 is directly or indirectly connected to the wheel, and the mover assembly 2 is directly or indirectly connected to the vehicle body, in which case a portion of the stator assembly 1 may be located at the lower side of the mover assembly 2. The mover assembly 2 is movably matched with the stator assembly 1 to adjust the length of the shock absorber 100 so as to adjust the posture of the vehicle body, thereby adapting to different running conditions of the vehicle and keeping the running stability of the vehicle.

The adjustment of the thrust of the shock absorber 100 and the damping of the shock absorber 100 can be realized by changing the current magnitude and the current direction of the stator coil 12 to change the magnetic field intensity and the magnetic field direction of the stator coil 12 so as to change the acting force between the stator assembly 1 and the rotor assembly 2, thereby realizing the lifting or the lowering of the posture of the whole vehicle. For example, a vehicle has a plurality of shock absorbers 100, the plurality of shock absorbers 100 are respectively mounted on different wheels, and the plurality of shock absorbers 100 can be respectively and independently controlled to achieve adjustment of the posture of a vehicle body on one side (for example, lifting or lowering the height of the vehicle body on one side).

As shown in fig. 2 and 4, the shock absorber 100 further includes a displacement detecting assembly 3, where the displacement detecting assembly 3 includes a first mating member 31 and a second mating member 32, the second mating member 32 mates with the first mating member 31 to enable the displacement detecting assembly 3 to detect displacement of the mover assembly 2 relative to the stator assembly 1, the first mating member 31 is fixed on the stator body 11, for example, the first mating member 31 is fixed on one side of the stator body 11 in a preset direction, the second mating member 32 is fixed on the mover assembly 2 (for example, the second mating member 32 is fixed on the mover magnetic steel 21 or a mover body 22 described later, etc.), and the first mating member 1 and the second mating member 32 cooperate to detect displacement of the mover assembly 2 relative to the stator assembly 1; when the mover assembly 2 moves relative to the stator assembly 1, the second mating member 32 moves with the mover assembly 2 relative to the first mating member 31 to obtain a displacement of the mover assembly 2 relative to the stator assembly 1, so that the displacement detection assembly 3 obtains a displacement of the mover assembly 2 relative to the stator assembly 1.

In the preset direction, the first gap 10c is formed between the stator body 11 and the rotor assembly 2, at least part of structures of the first matching piece 31 and the second matching piece 32 are located in the first gap 10c, so that the first matching piece 31 and/or the second matching piece 32 can utilize the space of the first gap 10c, the arrangement of the first matching piece 31 and/or the second matching piece 32 is more reasonable, therefore, the space utilization of the damper 100 is facilitated to be improved, the arrangement space of the damper 100 in the direction in which the stator assembly 1 and the rotor assembly 2 are in movable fit is reasonably utilized, the arrangement space of the damper 100 in the preset direction is prevented from being excessively occupied due to the arrangement of the displacement detection assembly 3, the arrangement of the displacement detection assembly 3 cannot excessively increase the size of the damper 100 in the preset direction, the arrangement of the first matching piece 31 and/or the second matching piece 32 is more reasonable, the waste of the space inside the damper 100 is facilitated to be avoided, and meanwhile, the utilization of the space of the damper 100 is facilitated to be conveniently reduced, and the arrangement of the first matching piece 31 and the second matching piece 32 on the rotor coil 12 and the rotor assembly 21 have enough thrust force to enable the damper 100 to be influenced by the damper 100.

It should be noted that, at least part of the structures of the first mating member 31 and the second mating member 32 are located in the first space 10c, and should be understood in a broad sense as follows: at least part of the first mating element 31 is located within the first void 10c and/or at least part of the second mating element 32 is located within the first void 10 c.

Illustratively, in the example of fig. 2, taking the preset direction as the axial direction of the damper 100 as an example, in the axial direction of the damper 100, a first gap 10c is formed between the stator body 11 and the mover assembly 2, the entire first matching member 31 is always disposed in the first gap 10c, and the first matching member 31 is disposed at one axial end of the stator body 11, and a portion of the second matching member 32 is disposed in the first gap 10c, so that the space of the first gap 10c can be reasonably utilized by the first matching member 31 and the second matching member 32, so that the space occupied by the damper 100 can be reasonably utilized by the displacement detection assembly 3, thereby being beneficial to reducing the size of the damper 100 in the radial direction of the damper 100, avoiding the waste of the space occupied by the damper 100, and being beneficial to making the internal components of the damper 100 more compact.

It should be noted that, the "displacement" in the present application is a vector, and the corresponding initial position may be preset in the displacement detection assembly 3.

It can be understood that the first mating member 31 is a sensor body, the second mating member 32 is a detected member, and the sensor body and the detected member are mated to obtain the displacement of the rotor assembly 2 relative to the stator assembly price; in other embodiments, the second mating member 32 is a sensor body and the first mating member 31 is a detected member. Of course, the displacement detection assembly 3 may be a grating displacement detection assembly or a resistive displacement detection assembly. When the displacement detection component 3 can be a grating type displacement detection component, the detected piece is a sensor grating, the sensor body is a grating sensor, when the displacement detection component 3 is a resistance type displacement detection component, the detected piece is a sensor magnetic stripe, and the sensor body is a resistance sensor or a current sensor; of course, the displacement detecting assembly 3 is not limited thereto, and the displacement detecting principles of the grating displacement detecting assembly and the resistive displacement detecting assembly are well known to those skilled in the art, and will not be described herein.

For example, taking a grating displacement detection assembly as an example, the detected piece is a sensor grating, the sensor body is a grating sensor, the grating sensor can identify the position information of the grating ruler strip in real time and communicate with the suspension controller in real time, when the relative position of the grating ruler strip and the grating sensor changes, fringes with alternate light and shade, namely moire fringes, are generated under the combined action of interference and diffraction of light, the grating sensor identifies and converts the moire fringes with alternate light and shade into an electric signal with sine wave change, two paths of sine waves or square waves with different degrees are obtained through amplifying and shaping processing, and the electric signal is input into the suspension controller for processing analysis so as to control the shock absorber 100 to increase damping or raise the height of a vehicle body.

According to the damper 100 of the embodiment of the present invention, the first gap 10c is provided between the stator body 11 and the mover assembly 2, and at least part of the structures of the first matching piece 31 and the second matching piece 32 are disposed in the first gap 10c, so that the space of the first gap 10c can be utilized by the first matching piece 31 and/or the second matching piece 32, the arrangement of the first matching piece 31 or the second matching piece 32 is more reasonable, so that the arrangement space of the damper 100 in the direction in which the stator assembly 1 and the mover assembly 2 are movably matched is reasonably utilized, the size space of the damper 100 in the preset direction is prevented from being excessively occupied due to the arrangement of the first matching piece 31 and the second matching piece 32, the arrangement of the first matching piece 31 and/or the second matching piece 32 is more reasonable, the waste of the space inside the damper 100 is avoided, the space utilization of the damper 100 is improved, and the influence of the arrangement of the second matching piece 32 on the stator coil 12 and the mover magnetic steel 21 is reduced, so that the damper 100 has sufficient thrust.

In some embodiments, as shown in fig. 2 to 3, a second gap 10d is formed between the stator body 11 and the mover assembly 2 in a direction perpendicular to the preset direction, at least part of the structure of one of the first mating member 31 and the second mating member 32 is located in the first gap 10c, and at least part of the structure of the other of the first mating member 31 and the second mating member 32 is located in the second gap 10d, so that the space of the first gap 10c and the second gap 10d can be more reasonably utilized by the first mating member 31 and the second mating member 32, so as to ensure that the second mating member 32 is always reliably mated with the first mating member 31, and the displacement detection assembly 3 is more reasonably arranged. Thereby, by disposing at least a part of the structure of one of the first and second mating members 31 and 32 within the first space 10c and at least a part of the structure of the other of the first and second mating members 31 and 32 within the second space 10d, the arrangement space of the stator body 11 and the mover assembly 2 in the direction perpendicular to the preset direction is reasonably utilized so as to reduce the size of the damper 100 in the direction perpendicular to the preset direction; it can be seen that, in the above technical solution, the first fitting 31 and the second fitting 32 can reasonably utilize the space of the shock absorber 100 in the preset direction and the direction perpendicular to the preset direction.

Alternatively, taking the preset direction as the axial direction of the damper 100 as an example, when the mover assembly 2 is sleeved outside the stator body 11 (as shown in fig. 2), the second gap 10d may be located between the inner circumferential wall of the mover assembly 2 and the outer circumferential wall of the stator body 11; when the stator body 11 is sleeved outside the mover assembly 2, the second gap 10d may be located between the inner circumferential wall of the stator body 11 and the outer circumferential wall of the mover assembly 2; when the stator body 11 includes a first guide member, the mover assembly 2 includes a second guide member, and the second guide member cooperates with the first guide member to guide the moving direction of the mover assembly 2 relative to the stator assembly 1, the first guide member and the second guide member are sleeved and cooperate, and the second gap 10d may be located between the first guide member and the second guide member, for example, the first guide member is a guide hole, the second guide member is a guide post, the second gap 10d is located between an outer peripheral wall of the guide post and a hole wall of the guide hole (i.e., a side wall of the guide hole), for example, the first guide member is a guide post, the second guide member is a guide hole, and the second gap 10d is still located between an outer peripheral wall of the guide post and a hole wall of the guide hole.

For example, in the examples of fig. 2 and 3, the preset direction is the axial direction of the shock absorber 100, the first fitting member 31 is located in the first space 10c, a portion of the second fitting member 32 is located in the first space 10c, and a portion of the second fitting member 32 is located in the second space 10d, the first fitting member 31 and the second fitting member 32 are disposed radially opposite to each other to be fitted to each other, so that the internal arrangement space of the shock absorber 100 is reasonably utilized by the first fitting member 31 and the second fitting member 32, and the shock absorber 100 is made more compact. For another example, in the example of fig. 4, the second fitting 32 is located in the first space 10c, a portion of the first fitting 31 is provided in the first space 10c, and a portion of the first fitting 31 is provided in the second space 10 d.

In some embodiments, as shown in fig. 2, when the second mating member 32 or the first mating member 31 is a detected member, for example, the detected member is a sensor grating or a sensor magnetic stripe, the length of the detected member in the preset direction should be greater than or equal to the maximum stroke of the rotor assembly 2 relative to the stator assembly 1, so as to ensure that the detection range of the displacement detection assembly 3 is greater than the movement stroke of the shock absorber 100, so as to ensure that the measurement range is accurate and reasonable. For example, the length of the detected member in the up-down direction is greater than the sum of the up-jump stroke and the down-jump stroke of the mover assembly 2 with respect to the stator assembly 1 with the preset direction being the up-down direction.

In some embodiments, as shown in fig. 2 and 3, the mover assembly 2 further includes a mover body 22, the mover body 22 defines a polygonal structure or a cylindrical structure, the mover magnetic steel 21 is disposed on an inner peripheral wall of the mover body 22, at least a part of the structure of the stator assembly 1 is disposed in the mover body 22, and then the mover body 22 is sleeved outside the stator assembly 1, and the mover assembly 2 can move relative to the stator assembly 1 along an axial direction of the mover body 22.

Therefore, the rotor body 22 can play a certain role in protecting the stator assembly 1, and the displacement detection assembly 3 does not occupy too much arrangement space provided for the stator coil 12 in the rotor body 22, so that the stator coil 12 is convenient to set, and the length of the rotor body 22 is not required to be increased to provide the arrangement space for the displacement detection assembly 3. At this time, the portion of the stator assembly 1 protruding into the mover body 22 may be understood as a portion of the stator assembly 1 that cooperates with the mover assembly 2.

For example, in the example of fig. 2, taking a preset direction as an up-down direction, a part of the stator assembly 1 is located at an upper side of the mover assembly 2 as an example, a plurality of wire grooves are provided on an outer circumferential wall of the stator body 11, the wire grooves are arranged at intervals along an axial direction of the stator body 11, each wire groove extends along a circumferential direction of the stator body 11, the stator coil 12 is provided in the corresponding wire groove, an insulating member is provided in the wire groove to insulate the stator coil 12 from the stator body 11, the stator assembly 1 is provided in the mover body 22, and the mover body 22 is movable in the up-down direction relative to the stator assembly 1.

Wherein, in the direction of predetermineeing, the terminal surface that stator module 1 is close to the diapire of rotor body 22 sets up with the diapire interval of rotor body 22 in order to form first space 10c, and a portion of stator module 1 can be located the upside of rotor module 2 this moment, and the terminal surface that stator module 1 is close to the diapire of rotor body 11 is formed with the installation face of first fitting piece 31, conveniently sets up first fitting piece 31 in order to effectively utilize the space in first space 10c, and the reliable cooperation of first fitting piece 31 of being convenient for and second fitting piece 32 guarantees the accuracy that first fitting piece 31 and second fitting piece 32 detected rotor module 2 and for stator module 1 displacement.

In some embodiments, as shown in fig. 2, the shock absorber 100 further includes a first buffer member 4a, where the first buffer member 4a is disposed on the bottom wall of the mover body 22, and the end surface of the stator body 11 near the bottom wall of the mover body 22 has a first portion 11k and a second portion 11n, where the first portion 11k is adapted to contact with the first buffer member 4a to limit the movement of the mover assembly 2, and meanwhile, the first buffer member 4a can absorb collision energy, so as to reduce damage between the mover assembly 2 and the stator assembly 1, thereby playing a role of limiting and protecting.

The second portion 11n is formed as a mounting surface of the first mating member 31, and in a preset direction, a distance between the first portion 11k and the first buffer member 4a is smaller than or equal to a distance between the first mating member 31 and a bottom wall of the corresponding mover body 22, so as to ensure a sufficient distance between the first buffer member 4a and the first mating member 31, so that the arrangement of the first mating member 31 does not affect a stroke of the mover assembly 2 relative to the stator assembly 1, and ensure safety of the first mating member 31, and meanwhile, the length of the stator body 11 which can extend into the mover body 22 is facilitated to be improved, and the moving stroke of the mover assembly 2 is facilitated to be prolonged.

In some embodiments, as shown in fig. 2, the first buffer member 4 is formed with a relief groove 4c, and in a preset direction, the projection of the first mating member 31 is located in the relief groove 4c, so that the relief groove 4c can be used for accommodating the first mating member 31 to perform a relief function, and interference between the mover body 22 and the first mating member 31 is avoided to affect the safety of the first mating member 31; the distance between the bottom wall of the avoidance groove 4c and the first matching piece 31 is greater than or equal to the distance between the first buffer piece 4a and the first part 11k, so that enough distance between the avoidance groove 4c and the first matching piece 31 is ensured, the arrangement of the first matching piece 31 is further enabled not to influence the travel of the rotor assembly 2 relative to the stator assembly 1, and the safety of the first matching piece 31 is ensured.

For example, in the example of fig. 2, the preset direction is the up-down direction, the first buffer member 4a is formed with a avoidance groove 4c, the first matching member 31 is disposed at the lower end of the stator body 11, the first buffer member 4a is disposed on the bottom wall of the mover body 22, and the avoidance groove 4c is used for accommodating the first matching member 31, so as to play a role of avoidance, facilitate the lifting of the length of the stator body 11 that can extend into the mover body 22, and facilitate the extension of the moving stroke of the mover assembly 2.

In other embodiments, the escape groove 4c may also be formed on the bottom wall of the mover body 22.

In some embodiments, as shown in fig. 2, the stator assembly 1 comprises a first guide and the mover assembly 2 comprises a second guide, the first guide and the second guide being cooperatively arranged to move the mover assembly 2 along a predetermined trajectory relative to the stator assembly 1, e.g., the first guide and the second guide cooperate to guide movement of the mover assembly 2 relative to the stator assembly 1. The first fitting piece 31 is arranged on the first guide piece, the second fitting piece 32 is arranged on the second guide piece, and the first fitting piece 31 and the second fitting piece 32 are matched to detect the displacement of the rotor assembly 2 relative to the stator assembly 1, and meanwhile, the space at the first guide piece and the second guide piece is convenient to reasonably utilize.

Wherein, in the direction perpendicular to the preset direction, a second gap 10d is formed between a part of the second guide and a part of the first guide so as to reasonably utilize the arrangement space of the stator body 11 and the mover assembly 2 in the direction perpendicular to the preset direction, so as to reduce the size of the damper 100 in the direction perpendicular to the preset direction; it can be seen that, in the above technical solution, the first fitting 31 and the second fitting 32 can reasonably utilize the space of the shock absorber 100 in the preset direction and the direction perpendicular to the preset direction.

For example, the first fitting piece 31 is located in the first space 10c, and in a direction perpendicular to the preset direction, a part of the first guide piece and a part of the second guide piece have the second space 10d therebetween, and at least a part of the structure of the second fitting piece 32 is located in the second space 10 d.

In some embodiments, one of the first guide member and the second guide member is a guide hole, and the other is a guide post, and the guide hole cooperates with the guide post to guide the movement of the mover assembly 2 relative to the stator assembly 1, so as to facilitate the operational stability of the shock absorber 100.

For example, in the example of fig. 2, the preset direction is an up-down direction, the stator assembly 1 includes a first guide member, which is a guide hole, the mover assembly 2 is provided with a second guide member, which is a guide post, which extends downward to penetrate the lower end face of the stator body 11, and the guide post and the guide hole cooperate to guide the mover assembly 2 to move in an axial direction (up-down direction in fig. 2) with respect to the stator assembly 1. Taking an example that a part of the stator assembly 1 is located at the upper side of the rotor assembly 2, the first matching piece 31 is located at the lower axial end of the stator body 11, the second matching piece 32 is located on the guide post, and at least the upper part of the orthographic projection of the second matching piece 32 overlaps at least the lower part of the orthographic projection of the rotor magnetic steel 21 on a preset plane, wherein the preset plane is parallel to the preset direction; alternatively, the first mating member 31 is disposed at the axial lower end of the stator body 11, the second mating member 32 is disposed between the mover magnet steel 21 and the stator coil 12 in the radial direction of the stator body 11, and at least an upper portion of the orthographic projection of the second mating member 32 overlaps at least a lower portion of the orthographic projection of the mover magnet steel 21 in a predetermined plane.

Of course, in other examples, the first guide is a guide post and the second guide is a guide hole.

In some embodiments, as shown in fig. 2, a first guide post 23 is provided on the mover body 22, the first guide post 23 is configured as a second guide, the stator body 11 is formed with a first guide hole 13, the first guide hole 13 is configured as a first guide, the first guide post 23 is received in the first guide hole 13, the first guide post 23 includes a contact portion that moves along a sidewall of the first guide hole 13 for guiding a moving direction of the mover assembly 2 with respect to the stator assembly 1, and a non-contact portion that is spaced apart from the first guide hole 13 to form a second gap 10d between the non-contact portion and the sidewall of the first wire space 12 to provide a space for the arrangement of the other of the first and second mating members 31 and 32. Illustratively, the first fitting 31 may be disposed at the first guide hole 13 at one side of the stator body 11 in a preset direction, the second fitting 32 may be disposed between a sidewall of the first guide hole 13 and an outer circumferential wall of the first guide post 23, the first fitting 31 may be disposed in the first space 10c, and a portion of the second fitting 32 may be disposed in the first space 10 c.

For example, in the example of fig. 2, the inner wall of the mover body 22 is provided with a first guide post 23, the stator body 11 is formed with a first guide hole 13, the first guide post 23 extends in the axial direction of the stator body 11 and protrudes into the first guide hole 13, a contact portion of the first guide post 23 is slidably fitted with a side wall of the first guide hole 13, and a non-contact portion of the first guide post 23 is disposed at a distance from the first guide hole 13 to form a second gap 10d. In the radial direction of the stator body 11, the stator coil 12 is located at the radial outer side of the first guide hole 13, the first matching piece 31 and the second matching piece 32 cannot occupy the arrangement space of the stator coil 12, the thrust of the shock absorber 100 is prevented from being influenced due to the reduction of the arrangement space of the stator coil 12, meanwhile, the arrangement mode of the displacement detection assembly 3 is diversified, so that the shock absorber 100 with different structures is adapted, and the applicability of the shock absorber 100 is improved.

In some embodiments, as shown in fig. 2 and 3, a first mounting surface 11g is formed on the stator body 11, a second mounting surface 23a is formed on the first guide post 23, the first mounting surface 11g and the second mounting surface 23a are arranged at intervals, a first matching member 31 is arranged on the first mounting surface 11g, and a second matching member 32 is arranged on the second mounting surface 23a, so that the first matching member 31 and the second matching member 32 can be matched reliably, and the accuracy of detecting the displacement of the rotor assembly 2 relative to the stator assembly 1 by the first matching member 31 and the second matching member 32 is ensured.

Alternatively, the first mounting surface 11g may be: the stator body 11 may be adjacent to an end surface of the bottom wall of the mover body 22 or a side wall of the first guide hole 13, and the second mounting surface 23a may be an outer circumferential wall of the first guide post 23.

For example, in the example of fig. 2, the preset direction is the up-down direction, the first guide hole 13 is formed in the stator body 11, the first guide post 23 is formed on the bottom wall of the mover body 22, the first guide post 23 is slidably engaged with the side wall of the first guide hole 13, the first mounting surface 11g is a portion of the end surface of the stator body 11 close to the bottom wall of the mover body 22, the first engaging member 31 is provided on the first mounting surface 11g, the second mounting surface 23a is the outer peripheral wall of the first guide post 23, the second engaging member 32 is provided on the second mounting surface 23a, the second engaging member 32 is spaced from the wall of the first guide hole 13, and the second engaging member 32 does not affect the slidably engaged between the first guide post 23 and the first guide hole 13, so that the space between the first guide post 23 and the first guide hole 13 is reasonably utilized on the premise of ensuring that the mover assembly 2 and the stator assembly 1 are stably engaged. The first matching piece 31 is matched with the second matching piece 32, when the rotor assembly 2 is displaced relative to the stator assembly 1, the rotor body 22 drives the first guide post 23 to be matched with the side wall of the first guide hole 13 in a sliding manner along the axial direction of the stator body 11, and the first detection piece is matched with the second detection piece to detect the displacement of the rotor assembly 2 relative to the stator assembly 1.

In the above technical solution, the first matching member 31 may be a sensor body or a detected member.

In other embodiments, the rotor body 22 defines a polygonal structure or a cylindrical structure, the stator body 11 is formed with a first mounting surface 11g, the inner peripheral wall of the rotor body 22 is formed with a third mounting surface 22b, the first mounting surface 11g and the third mounting surface 22b are spaced apart, the second mating member 32 is disposed on the third mounting surface 22b, the first mating member 31 is disposed on the first mounting surface 11g, the first mating member 31 mates with the second mating member 32, and reliable mating of the first mating member 31 and the second mating member 32 can be achieved to detect the displacement of the rotor assembly 2 relative to the stator assembly 1. At this time, the stator assembly 1 and the mover assembly 2 may be in guiding engagement with each other by the first guide and the second guide, or the stator assembly 1 and the mover assembly 2 may not be in guiding engagement with each other by the first guide and the second guide.

The second engaging member 32 is disposed on the inner peripheral wall of the mover body 22, and may include that the second engaging member 32 is directly or indirectly disposed on the inner peripheral wall of the mover body 22. For example, in the example of fig. 2, taking an example that a part of the stator assembly 1 is located at the upper side of the mover assembly 2, the lower end of the mover magnetic steel 21 is disposed at an upper-lower interval from the inner bottom wall of the mover body 22, so that the inner circumferential wall of the mover body 22 may include a first circumferential wall and a second circumferential wall sequentially disposed along the upper-lower direction, the mover magnetic steel 21 is disposed only on the first circumferential wall and does not cover the second circumferential wall, the lower portion of the second mating member 32 is fixed with the second circumferential wall, and the upper end of the second mating member 32 may extend up between the mover magnetic steel 21 and the stator assembly 1, so that the second mating member 32 is directly disposed on the inner circumferential wall of the mover body 22; of course, the second mating member 32 may also be fixed to the inner peripheral wall of the mover magnetic steel 21 such that the second mating member 32 is indirectly disposed on the inner peripheral wall of the mover body 22.

Alternatively, the first mounting surface 11g may be: the second mounting surface 23a may be an outer peripheral wall of the first guide post 23, which is an end surface of the stator body 11 on a side of the inner portion of the mover body 22 that is far from the first opening 22a, or a side wall of the first guide hole 13.

For example, in the example of fig. 2, the preset direction is the up-down direction, the first opening 22a is located on the upper side of the mover body 22, the stator body 11 extends into the mover body 22 through the first opening 22a, the first guide hole 13 is formed in the stator body 11, the first guide post 23 is formed on the bottom wall of the mover body 22, the first guide post 23 is slidably engaged with the side wall of the first guide hole 13, the first mounting surface 11g is the end surface of the portion of the stator body 11 extending into the mover body 22 far away from the first opening 22a, the first engaging member 31 is provided on the first mounting surface 11g, the second mounting surface 23a is the outer peripheral wall of the first guide post 23, the second engaging member 32 is provided on the second mounting surface 23a, and the second engaging member 32 is provided at a distance from the wall of the first guide hole 13, so that the sliding engagement of the first guide post 23 and the first guide hole 13 is not affected by the second engaging member 32, so that the space between the first guide post 23 and the first guide hole 13 is reasonably utilized on the premise that the engagement of the mover assembly 2 and the stator assembly 1 is ensured to be stable. The first matching piece 31 is matched with the second matching piece 32, when the rotor assembly 2 is displaced relative to the stator assembly 1, the rotor body 22 drives the first guide post 23 to be matched with the side wall of the first guide hole 13 in a sliding manner along the axial direction of the stator body 11, and the first detection piece is matched with the second detection piece to detect the displacement of the rotor assembly 2 relative to the stator assembly 1.

In other embodiments, the mover body 22 defines a polygonal structure or a cylindrical structure having a first opening 22a, the stator body 11 is formed with a first mounting surface 11g, the inner peripheral wall of the mover body 22 is formed with a third mounting surface 22b, the first mounting surface 11g is spaced from the third mounting surface 22b, the second engaging member 32 is disposed on the third mounting surface 22b, the first engaging member 31 is disposed on the first mounting surface 11g, the first engaging member 31 engages with the second engaging member 32, and reliable engagement of the first engaging member 31 with the second engaging member 32 can be achieved to detect displacement of the mover assembly 2 relative to the stator assembly 1. At this time, the stator assembly 1 and the mover assembly 2 may be in guiding engagement with each other by the first guide and the second guide, or the stator assembly 1 and the mover assembly 2 may not be in guiding engagement with each other by the first guide and the second guide.

The second engaging member 32 is disposed on the inner peripheral wall of the mover body 22, and may include that the second engaging member 32 is directly or indirectly disposed on the inner peripheral wall of the mover body 22. For example, in the example of fig. 2, taking an example that a part of the stator assembly 1 is located at the upper side of the mover assembly 2, the lower end of the mover magnetic steel 21 is disposed at an upper-lower interval from the inner bottom wall of the mover body 22, so that the inner circumferential wall of the mover body 22 may include a first circumferential wall and a second circumferential wall sequentially disposed along the upper-lower direction, the mover magnetic steel 21 is disposed only on the first circumferential wall and does not cover the second circumferential wall, the lower portion of the second mating member 32 is fixed with the second circumferential wall, and the upper end of the second mating member 32 may extend up between the mover magnetic steel 21 and the stator assembly 1, so that the second mating member 32 is directly disposed on the inner circumferential wall of the mover body 22; of course, the second mating member 32 may also be fixed to the inner peripheral wall of the mover magnetic steel 21.

In some embodiments, as shown in fig. 3, the first guide post 23 is provided with a first mounting groove 231 to form a non-contact portion, a groove wall of one side of the first mounting groove 231 away from the guide hole forms a second mounting surface 23a, and the second mating member 32 is disposed on the second mounting surface 23a, so that the second mating member 32 is mounted on the first mounting groove 231, so that the first guide post 23 vacates a suitable mounting space for the second mating member 32, a reasonable distance between the first mating member 31 and the second mating member 32 in a direction perpendicular to a preset direction is conveniently achieved, and the first mating member 31 and the second mating member 32 are prevented from interfering when slidingly mated with the first guide hole 13 along the preset direction along with the first guide post 23, thereby facilitating the setting of the second mating member 32 without changing the volume of the original stator coil 12, and simultaneously making the internal structure of the damper 100 more compact.

For example, in the example of fig. 2 to 3, the first fitting member 31 is a sensor body, the second fitting member 32 is a detected member, such as a sensor grating, the outer peripheral wall of the first guide post 23 is formed with a first mounting groove 231, the second fitting member 32 is disposed in the first mounting groove 231, and the first fitting member 31 is disposed radially opposite to the second fitting member 32.

Optionally, the first guide post 23 includes a first post segment 231 and a second post segment 232, the first mounting groove 231 is formed on an outer peripheral wall of the first post segment 231, and the second post segment 232 is in guiding engagement with the first guide hole 13, that is, the length of the first mounting groove 231 is smaller than that of the first guide post 23, so that the first guide post 23 and the first guide hole 13 have a sufficient engagement length to ensure a guiding effect after the first guide post 23 and the first guide hole 13 are engaged, thereby ensuring accuracy of the moving direction of the mover assembly 2 relative to the stator assembly 1, and simultaneously being beneficial to both the engagement accuracy of the first guide post 23 and the first guide hole 13 and reducing the requirement on the cross-sectional shape of the first guide post 23.

In some embodiments, as shown in fig. 2, the rotor body 11 has a first opening 22a, and the stator assembly 1 may extend into the rotor body 22 through the first opening 22a, so that the rotor body 22 is sleeved outside the stator assembly 1, and the rotor assembly 2 moves relative to the stator assembly 1 along the axial direction of the stator body 11; at least part of the stator assembly 1 is suitable for being exposed to the rotor body 22 from the first opening 22a, so that the part of the stator coil 12 exposed to the outside of the rotor body 22 can directly exchange heat with the external environment, and meanwhile, the rotor assembly 2 moves reciprocally relative to the stator assembly 1 to drive the air inside the rotor body 22 to flow, which is beneficial to timely radiating the heat inside the rotor body 22, thereby reducing the temperature of the stator coil 12, improving the performance of the shock absorber 100, further reducing the electric energy loss of the vehicle, and simultaneously avoiding damaging the internal components (such as the first matching piece 31 or the stator coil 12, etc.) of the shock absorber 100 at high temperature, so as to prolong the service life of the shock absorber 100.

In addition, the length of the superposition part of the stator assembly 1 and the rotor assembly 2 in the moving direction can be not limited by the size of the rotor body 22, compared with the rotor body 22 with the same specification, the effective combination length of the rotor assembly 2 and the stator assembly 1 is longer, the length of the rotor body 22 is not required to be increased to increase the effective combination length or the current of the stator coil 12 is increased to improve the magnetic field intensity, and larger thrust can be obtained, so that the damping adjustment effect of the shock absorber 100 is better, and the vehicle body posture adjustment effect is better.

It can be appreciated that in the prior art, the end of the mover body is closed, in order to ensure that the stroke between the mover assembly and the stator assembly meets the requirement of vehicle body posture adjustment, a larger mover body needs to be arranged, the stroke adjustment requirement is met, meanwhile, the effective combination length can be further increased to meet the thrust requirement, the mover body 22 is provided with the first opening 22a, the size of the mover body 22 does not need to be increased, at least part of the stator assembly 1 can extend out of the mover body 22 to meet the requirement of vehicle body posture adjustment, and the effective combination length can be increased.

In some embodiments, as shown in fig. 1 and 2, the shock absorber 100 further includes a first mounting seat 5, a second mounting seat 6, and a damping spring 7, where the first mounting seat 5 is fixed with the stator assembly 1, the second mounting seat 6 is fixed with the mover assembly 2, and the damping spring 7 is stopped between the first mounting seat 5 and the second mounting seat 6 to absorb shock transferred from the ground to the vehicle body when the vehicle travels, so as to ensure good driving smoothness of the vehicle.

For example, in the example of fig. 2, a part of the stator assembly 1 is located at the upper side of the mover assembly 2, the first mounting seat 5 is located at the upper side of the mover assembly 2 and is circumferentially disposed on the stator body 11, the second mounting seat 6 is fixedly disposed on the upper peripheral wall of the mover assembly 2, the second mounting seat 6 is located at the lower side of the first mounting seat 5 and is oppositely disposed, a damping spring 7 is disposed between the first mounting seat 5 and the second mounting seat 6, two ends of the damping spring 7 respectively abut against the first mounting seat 5 and the second mounting seat 6, and the second mounting seat 6 moves along a preset direction relative to the first mounting seat 5 along with the mover assembly 2. Of course, the positions of the first mount 5 and the second mount 6 are not limited thereto.

For example, in the example of fig. 2, a part of the stator assembly 1 is located at the upper side of the mover assembly 2, the first mount 5 is fixed at the lower side of the stator body 11, the first mount 5 is disposed around the portion of the mover magnetic steel 21 located at the lower side of the stator assembly 1, the second mount 6 is located at the lower side of the first mount 5, the second mount 6 is disposed around the mover magnetic steel 21, the damper spring 7 is disposed between the first mount 5 and the second mount 6, and the second mount 6 follows the mover assembly 2 to move in a preset direction with respect to the first mount 5. Of course, the positions of the first mount 5 and the second mount 6 are not limited thereto.

In some embodiments, the first mount 5 and/or the second mount 6 are provided with a spring buffer (e.g., a rubber member, etc.), against which the damper spring 7 is stopped, the spring buffer can absorb frictional shock, etc. between the damper spring 7 and the first mount 5 or the second mount 6 to reduce noise of the damper 100.

Of course, the first mount 5 and the second mount 6 may also each be provided with a spring buffer.

In some embodiments, as shown in fig. 2, the shock absorber 100 further includes a protection member 9, where the protection member 9 is covered on the outer side of the damping spring 7 and the protection member 9 is fixed with the first mounting seat 5, so as to protect the internal components of the shock absorber 100 and prevent impurities from entering the shock absorber 100 to affect the normal operation of the shock absorber 100.

Wherein, the bottom of guard 9 is located the below of second mount pad 6, and the bottom of guard 9 is suitable for with second mount pad 6 butt in order to restrict the biggest displacement of shock absorber 100 to the displacement of restriction shock absorber 100 has improved the utilization ratio of second mount pad 6.

In some embodiments, as shown in fig. 2, the shock absorber 100 further includes a second buffer member 4b, where the second buffer member 4b is disposed on a side of the bottom end of the protection member 9 facing the second mounting seat 6, and the second buffer member 4b is adapted to abut against the mover assembly 2 to limit a maximum length of a portion of the stator assembly 1 exposed to the mover body 22 in a preset direction, and absorb noise when the second mounting seat 6 abuts against the protection member 9.

For example, in the example of fig. 2, the mover assembly 2 includes a mover body 22, the first mount 5 is disposed above the second mount 6, the second buffer member 4b is disposed at a lower end of the guard 9, and when the second mount 6 moves downward to a downward-skip-travel limit position, the second mount 6 is in stop contact with the second buffer member 4b, the second buffer member 4b limits the second mount 6 from continuing to move downward, and the second mount 6 is fixedly connected to the mover body 22, thereby limiting a maximum travel of the downward movement of the mover assembly 2; the shock absorber 100 further includes a first buffer member 4a, the first buffer member 4a is provided on a bottom wall of the mover body 22 away from the interior of the first opening 22a, when the mover body 22 moves upward to the upper jump stroke limit position, the mover body 22 is in stop contact with the first buffer member 4a, and the first buffer member 4a limits the continued upward movement of the mover body 22, thereby limiting the maximum stroke of the upward movement of the mover assembly 2. In some embodiments, as shown in fig. 2, the displacement detection assembly 3 further has a connection line 33, the connection line 33 is electrically connected to the first mating member 31, the other end of the connection line 33 may be connected to a suspension controller, the suspension controller receives a signal sent by the displacement detection assembly 3 to adjust the length of the shock absorber 100 to adjust the posture of the whole vehicle, the stator body 11 is formed with a first routing channel 11a, the first routing channel 11a extends to an end of the stator body 11 far away from the mover magnetic steel 21, and the connection line 33 is guided to the outside of the stator assembly 1 and to the outside of the mover body 22 through the first routing channel 11 a.

It can be seen that the connecting wire 33 is connected to the first mating member 31 and the suspension controller through the first routing channel 11a on the stator body 11, so that the arrangement of the connecting wire 33 is facilitated, and the connecting wire 33 and the first mating member 31 are relatively stationary with the stator body 11, so that the connecting wire 33 is prevented from being damaged by the relative movement of the internal components of the shock absorber 100, the connecting wire 33 is protected, and the internal wiring harness of the shock absorber 100 is more reliably arranged. In addition, the first routing channel 11a can guide the connecting wire 33 to one end of the stator body 11 far away from the rotor magnetic steel 21, so that the wire outlet position of the connecting wire 33 is far away from the rotor magnetic steel 21, and the travel of the rotor assembly 2 relative to the stator assembly 1 is not limited. Illustratively, in the above technical solution, when the displacement detection assembly 3 is a grating displacement detection assembly, the first matching element 31 is a grating sensor; alternatively, when the displacement detecting element 3 is a resistive displacement detecting element, the first mating member 31 is a resistive sensor or a current sensor. For example, in the example of fig. 2, the stator assembly 1 is connected to a vehicle body, the mover assembly 2 is connected to a wheel, the upper end of the mover body 22 is formed with a first opening, the stator assembly 1 is extended into the interior of the mover body 22 through the first opening, the bottom end of the stator body 11 is provided with a first fitting member 31, a first routing channel 11a is formed in the stator body 11, the first routing channel 11a extends from the lower end surface of the stator body 11 to the top end of the stator body 11, a connecting wire 33 is provided in the first routing channel 11a, one end of the connecting wire 33 is connected to the first fitting member 31, the other end of the connecting wire 33 passes through the top end of the stator body 11 to be connected to a vehicle whole wire harness, and the whole wire harness is connected to a suspension controller, so that the displacement detection assembly 3 converts displacement of the mover assembly 2 relative to the stator assembly 1 into an electrical signal to be transmitted to the suspension controller through the connecting wire 33, so that the suspension controller obtains a height posture of the whole vehicle, and at the same time the suspension controller performs comprehensive analysis processing according to signals of other sensors (e.g., acceleration sensor etc.) to ensure that the vehicle is in a proper posture.

Of course, in other examples, the stator assembly 1 is connected to a wheel, the mover assembly 2 is connected to a vehicle body, the lower end of the mover body 22 is formed with a first opening 22a, the stator assembly 1 extends into the interior of the mover body 22 through the first opening 22a, the top end of the stator body 11 is provided with a first fitting 31, a first routing channel 11a is formed in the stator body 11, the first routing channel 11a extends from the upper end surface of the stator body 11 to the bottom end of the stator body 11, a connecting wire 33 is provided in the first routing channel 11a, one end of the connecting wire 33 is connected with the first fitting 31, and the other end of the connecting wire 33 passes through the bottom end of the stator body 11 and is connected with the vehicle whole wire harness. It will be appreciated that the first routing channel may also be formed as a channel for wires of the stator coil 12 connected to an external power source, or a channel dedicated to wires of the stator coil 12 connected to an external power source may be provided on the stator assembly. The present application does not specifically limit the arrangement of the passages of the electric wires connecting the stator coil 12 with the external power source.

In other embodiments, the displacement detection assembly 3 further has a connection line 33, the connection line 33 is electrically connected to the second mating member 32, the mover assembly 2 is formed with a second routing channel, the second routing channel extends to an end of the mover assembly 2 facing away from the stator assembly 1, and the connection line 33 is guided to the outside of the mover assembly 2 through the second routing channel.

It can be seen that the connecting wire 33 is connected with the second mating member 32 and the suspension controller through the second routing channel, so that the arrangement of the connecting wire 33 is facilitated, and the connecting wire 33 and the second mating member 31 are kept relatively static with the mover assembly 2, so that the connecting wire 33 is prevented from being damaged by the relative movement of the internal components of the shock absorber 100, the connecting wire 33 is protected, and the arrangement of the internal wiring harness of the shock absorber 100 is more reliable. In the above technical solution, for example, when the displacement detection assembly 3 is a grating displacement detection assembly, the second matching element 32 is a grating sensor; alternatively, when the displacement detecting element 3 is a resistive displacement detecting element, the second mating member 32 is a resistive sensor or a current sensor.

Optionally, the connecting wire 33 is electrically connected with the second matching piece 32, the inner wall of the cylinder 22 is provided with a first guide post 23, the stator body 11 is formed with a first guide hole 13, and the first guide post 23 extends along a preset direction and stretches into the first guide hole 13 to be used for guiding the moving direction of the rotor assembly 2 relative to the stator assembly 1; when the second fitting 32 is provided on the outer peripheral wall of the first guide post 23, a part of the second routing channel may also be formed on the first guide post 23.

In some embodiments, as shown in fig. 2, the stator body 11 includes a first body portion 111 and a second body portion 112, the stator coil 12 is disposed on the first body portion 111, at least a portion of the second body portion 112 is adapted to be located outside the mover body 22 and is formed with a vehicle body connection end, and an outer peripheral wall of the second body portion 112 is located radially inside an outer peripheral wall of the first body portion 111, so as to save an occupied space and a material consumption of the stator body 11 and reduce cost on the premise that the stator body 11 is reliably used; for example, taking the case where the predetermined direction is the up-down direction and a part of the stator assembly 1 is located at the upper side of the mover assembly 2, the second body portion 112 is located at the upper side of the first body portion 111, if the outer circumferential wall of the first body portion 111 and the outer circumferential wall of the second body portion 112 are both substantially cylindrical surfaces, the outer diameter of the first body portion 111 is larger than the outer diameter of the second body portion 112, and of course, the shape of the outer circumferential wall of the first body portion 111 and the outer circumferential wall of the second body portion 112 is not limited thereto.

The first routing channel 11a includes a first channel segment 11b and a second channel segment 11c, which are disposed in communication, the first channel segment 11b is formed on the first body portion 111, and the second channel segment 11c is formed on the second body portion 112, so as to guide the connecting wire 33 to an end of the stator body 11 far from the mover magnetic steel 21. For example, the first channel segment 11b may extend through to an end of the first body portion 111 remote from the second body portion 112, and the second channel segment 11c may extend through to an end of the second body portion 112 remote from the first body portion 111.

Alternatively, the first channel section 11b and the second channel section 11c may extend along a straight line or a curve; the first channel section 11b and the second channel section 11c are located on the same straight line or the first channel section 11b and the second channel section 11c are located on different straight lines, respectively.

In some embodiments, as shown in fig. 2, the minimum distance between the first channel segment 11b and the central axis of the mover body 22 (for example, the central axis m of fig. 2 is the central axis of the mover body 22) is greater than the minimum distance between the second channel segment 11c and the central axis of the mover body 22, so that the first channel segment 11b and the second channel segment 11c are staggered in the radial direction of the mover body 22, and the second channel segment 11c is closer to the central axis of the mover body 22 than the first channel segment 11b, while the second channel segment 11c is formed in the second body 112, and the peripheral wall of the second body 112 is located radially inside the peripheral wall of the first body 111, so that the above-mentioned arrangement of the first channel segment 11b and the second channel segment 11c is convenient for adapting to the structure of the stator body 11 itself; particularly when the radial distance between the outer peripheral wall of the first body portion 111 and the outer peripheral wall of the second body portion 112 is large, it is convenient to ensure that the outer peripheral wall of the second body portion 112 and the second channel segment 11c have a proper radial distance therebetween, and to facilitate the formation and use reliability of the second channel segment 11 c.

Of course, the minimum distance of the first channel segment 11b from the central axis of the mover body 22 may also be equal to the minimum distance of the second channel segment 11c from the central axis of the mover body 22.

It will be appreciated that the central axis of the mover body 22 extends in a predetermined direction and is the central axis of the damper 100 and is also the central axis of the stator body 11. In some embodiments, as shown in fig. 2, the first channel segment 11b is between the first guide and the stator coil 12 to avoid interference between the first channel segment 11b and the first guide hole 13, while facilitating the stator body 11 to have a sufficient thickness between the first channel segment 11b and the first guide hole 13 so as to ensure that the stator body 11 has sufficient structural strength and a service time. At this time, the first fitting 31 may be provided at the wall of the first guide hole 13, or the first fitting 31 may be provided at an end of the portion of the first body portion 111 protruding into the mover body 22 away from the first opening 22 a.

In some embodiments, as shown in fig. 2, taking an example that the preset direction is the up-down direction and a part of the stator assembly 1 is located at the upper side of the rotor assembly 2, the first channel segment 11b penetrates through the top wall of the first body portion 111 and/or the peripheral wall of the second body portion 112, and the second channel segment 11c penetrates through the peripheral wall of the second body portion 112, the first channel segment 11b and the second channel segment 11c are communicated at intervals, so as to facilitate the arrangement of the connecting wires 33 and simultaneously facilitate the processing of the first channel segment 11b and the second channel segment 11 c.

For example, the second channel segment 11c extends in the up-down direction to penetrate the top wall and the outer peripheral wall of the second body portion 112, and the first channel segment 11b extends in the up-down direction to penetrate the bottom wall and the top wall of the first body portion 111, or the first channel segment 11b penetrates the bottom wall of the first body portion 111 and the outer peripheral wall of the second body portion 112, or the first channel segment 11b penetrates the wall surface of the junction of the first body portion 111 and the second body portion 112 and the bottom wall of the first body portion 111.

The term "and/or" in this application is merely an association relation describing an associated object, and means that three kinds of relations may exist, for example, and/or may mean: the three cases exist alone, simultaneously and independently. In this application, the character "/" generally indicates that the associated object is an or relationship.

In some embodiments, as shown in fig. 2, the rotor magnetic steel 21 includes a plurality of annular permanent magnets 211, where the plurality of annular permanent magnets 211 are disposed along a preset direction (for example, the plurality of annular permanent magnets 211 are disposed at equal intervals along the preset direction) at intervals in the axial direction of the rotor body 22, so that a certain distance is formed between two adjacent annular permanent magnets 211, which is beneficial for the stator coil 12 to radiate heat through a gap between the adjacent annular permanent magnets 211, so as to avoid the performance of the shock absorber 100 from being affected by overheating inside the shock absorber 100 or the displacement detection assembly 3 from being disabled, burned out, etc. due to heat radiation, thereby improving the service performance of the shock absorber 100.

In some embodiments, as shown in fig. 2, taking an example that the first opening 22a is formed on the upper side of the rotor body 22, when the stator coil 12 is integrally located in the rotor body 22, the bottom end surface of the stator body 11 is located at the bottom of the rotor body 22, that is, in the preset direction, the depth of the rotor body 22 is greater than or equal to the height occupied by the stator coil 12, which is favorable for improving the matching length of the stator coil 12 and the rotor magnetic steel 21 in the preset direction, thereby being favorable for improving the maximum thrust that can be output by the shock absorber 100.

In some embodiments, as shown in fig. 4, the stator body 11 defines a polygonal structure or a cylindrical structure with a second opening 11e, the stator coil 12 is disposed on an inner peripheral wall of the stator body 11, the second opening 11e is located at one axial end of the stator body 11, the mover assembly 2 further includes a mover body 22, the mover body 22 is disposed on an inner side of the stator coil 12, the mover magnetic steel 21 is disposed on the mover body 22, the mover magnetic steel 21 can extend into the stator body 11 through the second opening 11e, and the stator body 11 is sleeved outside the mover magnetic steel 21; at this time, the first gap 10c may be located between an end of the mover body 22 extending into the stator body 11, which is remote from the second opening 11e, and the stator body 11.

Therefore, the stator body 11 can play a certain protection role on the rotor assembly 2, and the displacement detection assembly 3 does not occupy too much arrangement space provided for the stator coil 12 in the stator body 11, so that the stator coil 12 is convenient to set, and the length of the stator body 11 is not required to be increased to provide the arrangement space for the displacement detection assembly 3. At this time, the portion of the mover assembly 2 protruding into the stator body 1 may be understood as a portion of the mover assembly 2 engaged with the stator assembly 1.

For example, in the example of fig. 4, taking an example in which a part of the stator assembly 1 is located at the upper side of the mover assembly 2 and the second opening 11e is located at the lower side of the stator body 11, the mover assembly 2 protrudes into the stator body 11 through the second opening 11e, and the stator coil 12 is provided between the mover magnet steel 21 and the stator body 11 in the radial direction of the stator body 11. Of course, the second opening 11e may also be provided at the upper side of the stator body 11.

The stator body 11 is provided with a second guide post 11d, the second guide post 11d is configured as a first guide member, the mover body 22 is formed with a second guide hole 21a, the second guide hole 21a is configured as a second guide member, and the second guide post 11d is accommodated in the second guide hole 21a and moves along a side wall of the second guide hole 21a, so as to be used for guiding the moving direction of the mover assembly 2 relative to the stator assembly 1, and improving the running stability of the damper 100. Illustratively, the first fitting 31 may be disposed between the sidewall of the second guide hole 21a and the outer circumferential wall of the second guide post 11d, the second fitting 32 may be disposed at the second guide post 11d and at one side of the stator body 11 in the preset direction, the second fitting 31 may be disposed in the first space 10c, a portion of the first fitting 31 may be disposed in the first space 10c, and a portion of the first fitting 31 may be disposed in the second space 10d between the second guide post 11d and the second guide hole 21 a.

In some embodiments, as shown in fig. 4 to 5, a fourth mounting surface 21b is formed on the mover body 22, a fifth mounting surface 11h is formed on the second guide post 11d, the fourth mounting surface 21b and the fifth mounting surface 11h are arranged at intervals, the second matching member 32 is arranged on the fourth mounting surface 21b, and the first matching member 31 is arranged on the fifth mounting surface 11h, so that the first matching member 31 and the second matching member 32 are reliably matched, and the accuracy of detecting the displacement of the mover assembly 2 relative to the stator assembly 1 by the first matching member 31 and the second matching member 32 is ensured. In addition, the first matching piece 31 and the second matching piece 32 are reliably matched, the first matching piece 31 and the second matching piece 32 do not occupy the arrangement space of the stator coil 12, the thrust of the shock absorber 100 is prevented from being influenced due to the reduction of the arrangement space of the stator coil 12, meanwhile, the arrangement modes of the displacement detection assembly 3 are diversified, so that the shock absorber 100 with different structures is adapted, and the applicability of the shock absorber 100 is improved.

For example, in the example of fig. 4, the second opening 11e is located at the lower side of the stator body 11, the mover assembly 2 may extend into the stator body 11 through the second opening 11e, the mover body 22 is formed with a second guide hole 21a, a second guide post 11d is formed on the top wall of the stator body 11, the second guide post 11d is slidably engaged with a side wall of the second guide hole 21a, the fourth mounting surface 21b is an end surface of a portion of the mover body 22 extending into the stator body 11 on a side far away from the second opening 11e, the fifth mounting surface 11h is an outer circumferential wall of the second guide post 11d, the second engaging member 32 is spaced from a wall of the second guide hole 21a, and the second engaging member 32 does not affect the slidably engaging of the second guide post 11d and the second guide hole 21a so as to reasonably utilize a space between the second guide post 11d and the second guide hole 21a on the premise that the engagement of the mover assembly 2 and the stator assembly 1 is stable.

In other embodiments, the fourth mounting surface 21b is formed on the mover body 22, the sixth mounting surface 11j is formed on the inner peripheral wall of the stator body 11, the first mounting surface 11g is spaced apart from the sixth mounting surface 11j, the second engaging member 32 is provided on the fourth mounting surface 21b, the first engaging member 31 is provided on the sixth mounting surface 11j, and the first engaging member 31 is engaged with the second engaging member 32.

The second engaging member 32 is disposed on the inner peripheral wall of the stator body 11, and may include that the second engaging member 32 is directly or indirectly disposed on the inner peripheral wall of the stator body 11. For example, the second fitting piece 32 may be provided to the inner peripheral wall of the stator body 11 or the second fitting piece 32 may be indirectly provided to the inner peripheral wall of the stator coil 12.

In some embodiments, as shown in fig. 5, the outer peripheral wall of the second guide post 11d is formed with a second mounting groove 11f, and a groove wall of one side of the second mounting groove 11f, which is far away from the fourth mounting surface 21b, forms a fifth mounting surface 11h, and the first mating member 31 is mounted on the second mounting groove 11f, so that the second guide post 11d vacates a suitable mounting space for the first mating member 31, so that the first mating member 31 and the second mating member 32 are conveniently implemented to have a reasonable distance in a direction perpendicular to a preset direction, and interference between the first mating member 31 and the second mating member 32 when slidingly mated with the first guide hole 13 along the preset direction along with the first guide post 23 is avoided, thereby facilitating the setting of the second mating member 32 without changing the volume of the original stator coil 12, and not affecting the thrust of the damper 100, and simultaneously making the internal structure of the damper 100 more compact.

For example, in the example of fig. 4 and 5, the first fitting 31 is a detected member such as a sensor grating, the second fitting 32 is a sensor body, the second mounting groove 11f is formed in the outer peripheral wall of the second guide post 11d, the first fitting 31 is provided in the second mounting groove 11f, and the first fitting 31 is disposed radially opposite to the second fitting 32.

In some embodiments, as shown in fig. 2, the shock absorber 100 further includes a first buffer 4a, the first buffer 4a is located in the first gap 10c and the first buffer 4a is provided to the mover body 22 for limiting a moving range of the mover assembly 2 while reducing collision between the mover body 22 and the stator body 11 and noise. Wherein, first bolster 4a is formed with dodges groove 4c to be used for holding first cooperation spare 31, then mover assembly 2 is located when jumping up the limit, and first cooperation spare 31 can be located dodges groove 4c, in order to avoid damaging displacement detection assembly 3, is favorable to promoting mover assembly 2 simultaneously for stator module 1's removal length, is convenient for prolong mover assembly 2's removal stroke.

In still other embodiments, the stator body 11 defines a polygonal or cylindrical structure having a second opening 11e, the stator coil 12 is disposed on an inner circumferential wall of the stator body 11, the first mating member 31 is disposed on the inner circumferential wall of the stator body 11 and the first mating member 31 is located on one side of the stator body 11 in a predetermined direction (e.g., the first mating member 31 is located on one side of the stator body 11 away from the second opening 11e in the predetermined direction); the rotor assembly 2 further comprises a rotor body 22, the rotor body 22 is arranged on the inner side of the stator coil 12, the rotor magnetic steel 21 is arranged on the rotor body 22, the second matching piece 32 is arranged on the rotor body 22 so as to ensure that the first matching piece 31 can be reliably matched with the second matching piece 32, the first matching piece 31 and the second matching piece 32 do not occupy the arrangement space of the stator coil 12, the thrust of the shock absorber 100 is prevented from being influenced due to the reduction of the arrangement space of the stator coil 12, meanwhile, the arrangement mode of the displacement detection assembly 3 is diversified so as to adapt to the shock absorber 100 with different structures, and the applicability of the shock absorber 100 is improved. At this time, the stator assembly 1 and the mover assembly 2 may not be in guide engagement by the first guide and the second guide, or the stator assembly 1 and the mover assembly 2 may be in guide engagement by the first guide and the second guide.

Further, the inner wall of the stator body 11 is provided with a second guiding post 11d, the rotor magnetic steel 21 is formed with a second guiding hole 21a, the second guiding post 11d extends into the second guiding hole 21a for guiding the moving direction of the rotor assembly 2 relative to the stator assembly 1, and the second guiding post 11d extends into the second guiding hole 21a for guiding the moving direction of the rotor assembly 2 relative to the stator assembly 1, so as to improve the running stability of the damper 100. In some embodiments, the displacement detection assembly 3 further has a connection wire 33, the connection wire 33 is electrically connected with the first mating member 31, the stator body 11 is formed with a third routing channel, and the connection wire 33 is led out of the stator body 11 through the third routing channel.

It can be seen that the connecting wire 33 can be connected with the first matching member 31 and the suspension controller through the third wiring channel in the stator body 11, so that the arrangement of the connecting wire 33 is facilitated, the connecting wire 33 and the first matching member 31 are kept relatively static with the stator body 11, the connecting wire 33 is prevented from being damaged by the movement of the internal components (such as the rotor magnetic steel 21) of the shock absorber 100, the connecting wire 33 is protected, and the arrangement of the wire harness of the shock absorber 100 is simpler and more reliable. Illustratively, the displacement detecting assembly 3 is a grating type displacement detecting assembly 3, the first fitting member 31 is a grating sensor, and the second fitting member 32 is a grating ruler strip; alternatively, the displacement detecting component 3 is a resistive displacement detecting component 3, the first matching piece 31 is a resistive sensor or a current sensor, and the second matching piece 32 is a resistive ruler strip.

For example, the stator body 11 is connected with a vehicle body, the rotor magnetic steel 21 is connected with wheels, a second opening 11e is formed at the lower end of the stator body 11, the rotor magnetic steel 21 stretches into the stator body 11 through the second opening 11e, a first matching piece 31 is arranged on the inner peripheral wall of the stator body 11, a third wiring channel is formed on the stator body 11, the third wiring channel can extend to the top end of the stator body 11, one end of a connecting wire 33 is connected with the first matching piece 31, the other end of the connecting wire 33 passes through the top end of the stator body 11 through the third wiring channel to be connected with a vehicle whole wire harness, the vehicle whole wire harness is connected with a suspension controller, so that the displacement detection assembly 3 converts displacement of the rotor magnetic steel 21 relative to the stator body 11 into an electric signal to be transmitted to the suspension controller through the connecting wire 33, the suspension controller obtains displacement change of the vehicle shock absorber 100, and accordingly obtains the height posture of the whole vehicle, and meanwhile the suspension controller carries out comprehensive analysis processing according to signals of other sensors (such as an acceleration sensor and the like) to adjust the posture of the vehicle body to ensure that the vehicle runs in a proper posture.

Of course, in other examples, the stator body 11 is connected to the wheel, the rotor magnetic steel 21 is connected to the vehicle body, the upper end of the stator body 11 is formed with a second opening 11e, the rotor magnetic steel 21 extends into the stator body 11 through the second opening 11e, the inner peripheral wall of the stator body 11 is provided with a first matching piece 31, a third routing channel is formed in the stator body 11, and the third routing channel may extend to the bottom end of the stator body 11. Of course, in other embodiments, the third routing channel may also extend through the outer peripheral wall of the stator body 11.

In some embodiments, the displacement detection assembly 3 further has a connection wire 33, the connection wire 33 is electrically connected to the second mating member 32, the mover magnet steel 21 is formed with a fourth wiring channel, and the connection wire 33 is led to an end of the mover magnet steel 21 away from the stator body 11 through the fourth wiring channel.

It can be seen that the connecting wire 33 is connected with the second matching member 32 and the suspension controller through the fourth wiring channel on the rotor magnetic steel 21, so that the arrangement of the connecting wire 33 is facilitated, the connecting wire 33 and the second matching member 32 are kept relatively static with the stator body 11, the connecting wire 33 is prevented from being damaged by the relative movement of the internal components of the shock absorber 100, the connecting wire 33 is protected, and the arrangement of the internal wiring harness of the shock absorber 100 is more reliable. In addition, the fourth routing channel can guide the connecting wire 33 to one end of the rotor magnetic steel 21 far away from the stator body 11, so that the wire outlet position of the connecting wire 33 is far away from the stator body 11, and the travel of the rotor assembly 2 relative to the stator assembly 1 is not limited. In the above technical solution, for example, when the displacement detection assembly 3 is a grating type displacement detection assembly, the first matching piece 31 is a grating ruler strip, and the second matching piece 32 is a grating sensor; alternatively, when the displacement detecting assembly 3 is a resistive displacement detecting assembly, the first matching member 31 is a resistive ruler strip, and the second matching member 32 is a resistive sensor or a current sensor.

In some embodiments, the first mating member 31 is a sensor body, and the second mating member 32 is a sensor grating or a sensor magnetic stripe, and the sensor body is mated with the sensor grating or the sensor magnetic stripe to ensure the accuracy of measurement of the displacement detection component 3.

In some embodiments, as shown in fig. 1 and 2, the shock absorber 100 further includes a first support member 10a and a second support member 10b, the first support member 10a and the second support member 10b are respectively provided at upper and lower sides of the shock absorber 100, the first support member 10a is connected with the stator assembly 1, the second support member 10b is connected with the mover assembly 2, the first support member 10a and the second support member 10b facilitate mounting the shock absorber 100 to a vehicle, and the first support member 10a and the second support member 10b are respectively connected with a vehicle body and wheels, so that the shock absorber 100 will support the weight of the vehicle, absorb vibrations transmitted from the ground to the vehicle body, and improve the driving comfort of the vehicle.

For example, in the example of fig. 1, the first support 10a is located at the upper side of the damper 100 and is coupled to the stator body 11 through a bush bearing, the first support 10a is provided with a plurality of fixing members (e.g., bolts, etc.) to connect the stator assembly 1 and the vehicle body, the second support 10b is located at the lower side of the damper 100 and is fixedly coupled (e.g., bolted, etc.) to the lower end surface of the mover assembly 2, and the second support 10b is formed with a yoke to connect the mover assembly 2 and the vehicle wheel, thereby facilitating the installation of the damper 100.

A vehicle according to an embodiment of the second aspect of the present invention includes a vehicle body, a wheel, and a damper 100 according to the above-described embodiment of the first aspect of the present invention, the stator assembly 1 is connected to one of the vehicle body and the wheel, and the mover assembly 2 is connected to the other of the vehicle body and the wheel.

According to the vehicle of the embodiment of the invention, the comfort of the vehicle is improved by adopting the shock absorber 100 described above.

In the description of the present invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Claims

1. A shock absorber, comprising:

a stator assembly adapted to be connected to one of a vehicle body and a wheel, the stator assembly including a stator body and a stator coil provided to the stator body;

a mover assembly adapted to be connected to the other one of the vehicle body and the wheel, and movably engaged with the stator assembly in a preset direction, the mover assembly including a mover magnet steel;

the displacement detection assembly comprises a first matching piece and a second matching piece, the second matching piece is matched with the first matching piece so that the displacement detection assembly is used for detecting the displacement of the rotor assembly relative to the stator assembly, the first matching piece is fixedly arranged on the stator body, the second matching piece is fixedly arranged on the rotor assembly,

In the preset direction, a first gap is formed between the stator body and the rotor assembly, and at least part of structures of the first matching piece and the second matching piece are located in the first gap.

2. The shock absorber of claim 1 wherein there is a second gap between said stator body and said mover assembly in a direction perpendicular to said predetermined direction, at least a portion of one of said first mating member and said second mating member being located within said first gap and at least a portion of the other being located within said second gap.

3. The shock absorber of claim 1, wherein said mover assembly further comprises a mover body defining a polygonal or cylindrical structure, said mover magnet steel being disposed on an inner peripheral wall of said mover body, at least a portion of said stator assembly being disposed within said mover body;

in a preset direction, an end face, close to the bottom wall of the rotor body, of the stator assembly is arranged at intervals with the bottom wall of the rotor body to form the first gap, and an end face, close to the bottom wall of the rotor body, of the stator assembly is provided with a mounting face of the first matching piece.

4. A shock absorber according to claim 3, further comprising:

the first buffer piece is arranged on the bottom wall of the rotor body, the end face, close to the bottom wall of the rotor body, of the stator body is provided with a first part and a second part, the first part is suitable for being in contact with the first buffer piece to limit the movement of the rotor assembly, and the second part is formed to be a mounting surface of the first matching piece;

in the preset direction, the distance between the first part and the first buffer piece is smaller than or equal to the distance between the first matching piece and the bottom wall of the corresponding rotor body.

5. The shock absorber of claim 4, wherein the first buffer member or the bottom wall of the mover body is formed with a relief groove, in which a projection of the first mating member is located in a preset direction, and a distance between the bottom wall of the relief groove and the first mating member is greater than or equal to a distance between the first buffer member and the first portion.

6. The shock absorber of claim 2 wherein said stator assembly includes a first guide and said mover assembly includes a second guide, said first guide cooperatively disposed with said second guide to move said mover assembly along a predetermined trajectory relative to said stator assembly;

The first matching piece is arranged on the first guide piece, the second matching piece is arranged on the second guide piece, and a second gap is formed between part of the second guide piece and part of the first guide piece in the direction perpendicular to the preset direction.

7. The shock absorber according to claim 6, wherein a first guide post is provided on said mover body, said first guide post being configured as said second guide member, said stator body being formed with a first guide hole configured as said first guide member, said first guide post being accommodated in said first guide hole, said first guide post including a contact portion and a non-contact portion, said contact portion being moved along a side wall of said first guide hole, said non-contact portion being disposed at a distance from said first guide hole to form said second gap.

8. The shock absorber according to claim 7, wherein said first guide post is provided with a first mounting groove to form said non-contact portion, a groove wall of a side of said first mounting groove remote from said guide hole forming a second mounting surface, said second fitting being provided to said second mounting surface.

9. A damper according to claim 3, wherein the mover body has a first opening, at least part of the stator assembly being adapted to be exposed from the first opening to the mover body.

10. The shock absorber of claim 9 further comprising a first mount, a second mount and a damping spring, said first mount being fixed with said stator assembly, said second mount being fixed with said mover assembly, said damping spring being stopped between said first mount and said second mount.

11. The shock absorber of claim 10 further comprising a guard member, said guard member being disposed over said damper spring and secured to said first mount, said guard member having a bottom end positioned below said second mount, said guard member bottom end adapted to abut said second mount to limit maximum displacement of said shock absorber.

12. The shock absorber of claim 11 further comprising:

the second buffer piece is arranged at one side of the bottom end of the protection piece facing the second installation seat.

13. The shock absorber of claim 3 wherein said displacement sensing assembly further has a connecting wire,

The connecting wire is electrically connected with the first matching piece, a first wiring channel is formed on the stator body, and the first wiring channel extends to one end, far away from the rotor magnetic steel, of the stator body.

14. The shock absorber of claim 13 wherein said stator body comprises a first body portion and a second body portion, said stator coil being disposed on said first body portion, at least a portion of said second body portion being adapted to be located outside said mover assembly and formed with a body connection end, said first routing channel comprising a first channel segment and a second channel segment disposed in communication, said first channel segment being formed on said first body portion, said second channel segment being formed on said second body portion.

15. The shock absorber of claim 14 wherein a minimum distance of said first channel segment from a central axis of said mover assembly is greater than a minimum distance of said second channel segment from a central axis of said mover assembly.

16. The shock absorber of claim 15 wherein said first channel segment is between a first guide of said stator assembly and said stator coil.

17. A shock absorber according to claim 3, wherein the displacement detection assembly further has a connection wire electrically connected to the second mating member, the sub-assembly being formed with a second routing channel extending to an end of the sub-assembly facing away from the stator assembly.

18. The shock absorber of claim 1 wherein said first mating member is a sensor body and said second mating member is a sensor grating or a sensor magnetic stripe.

19. A vehicle comprising a body, a wheel and a shock absorber according to any one of claims 1-18, the stator assembly being connected to one of the body and the wheel, the mover assembly being connected to the other of the body and the wheel.