CN107757287B

CN107757287B - Suspension system of automobile and automobile with same

Info

Publication number: CN107757287B
Application number: CN201610700611.6A
Authority: CN
Inventors: 周志榜; 李伟伟
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2016-08-22
Filing date: 2016-08-22
Publication date: 2020-02-04
Anticipated expiration: 2036-08-22
Also published as: CN107757287A

Abstract

The invention discloses a suspension system of an automobile and the automobile with the same. The suspension system includes: the device comprises a shock absorber, a spring assembly, a locking device, a ball screw and a driving motor. The spring assembly comprises an upper tray, a lower tray and a damping spring. Locking means includes driver and locking subassembly, locking subassembly respectively with shock absorber barrel and lower tray cooperation, the driver with the locking subassembly cooperation in order to fix a position lower tray or remove the location through the locking subassembly. The ball screw comprises a screw rod and a nut, the screw rod is arranged on the shock absorber barrel, the nut vertically moves relative to the screw rod, and the nut and the lower tray are matched to drive the lower tray to vertically move. The driving motor is arranged on the shock absorber cylinder and is matched with the ball screw through the transmission mechanism to drive the nut to move relative to the screw. The automobile suspension system provided by the embodiment of the invention has the advantages of simple and compact structure, small occupied space, convenience in maintenance, no need of replacing accessories regularly and reduced use cost.

Description

Suspension system of automobile and automobile with same

Technical Field

The invention relates to the field of vehicles, in particular to a suspension system of an automobile and the automobile with the suspension system.

Background

The maneuverability and comfort of automobiles are more and more emphasized by people, and the vehicle suspension system plays an important role in the aspects of the maneuverability and comfort of automobiles. The suspension is a general name of all force transmission connecting devices between a vehicle body and wheels. It is mainly composed of spring (such as steel plate spring, helical spring and torsion bar spring), vibration damper and guide mechanism. When the automobile runs on different road surfaces, the suspension system realizes the elastic support between the automobile body and the wheels, so that the vibration of the automobile body and the wheels is effectively reduced, and the normal running of the automobile is ensured. Meanwhile, the phenomena of pitching, nodding, tilting and the like of the automobile body during starting, braking and steering of the automobile are caused, so that the running smoothness and the control stability of the automobile are changed.

Automotive suspension types can be divided into passive suspensions, semi-active suspensions and active suspensions. Both semi-active and active suspensions belong to electronically controlled suspension systems. The passive suspension is a mechanical suspension system consisting of a spring and a shock absorber, the semi-active suspension is a suspension system consisting of a spring with variable characteristics and a shock absorber, and the active suspension is a system capable of actively adjusting the rigidity and the damping of the suspension. The active suspension system adopts active or passive control elements in a suspension system to form a closed-loop control system, and actively reacts according to the motion condition of a vehicle and the road surface condition to inhibit the vibration and the swing of a vehicle body so as to enable the suspension to be in an optimal vibration damping state all the time. The power source structure adopted by the existing electronic control suspension system is very complex, needs to be replaced regularly, and has high maintenance and protection cost.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the invention provides the suspension system of the automobile, which has the advantages of simple and compact structure, small occupied space and convenience in maintenance.

The invention also provides an automobile with the suspension system.

A suspension system of an automobile according to an embodiment of the present invention includes: the vibration absorber comprises a vibration absorber cylinder and a main shaft which is telescopically arranged in the vibration absorber cylinder; the spring assembly comprises an upper tray, a lower tray and a damping spring, the upper tray is fixed on the end part of the main shaft, which extends out of the shock absorber cylinder, the lower tray is vertically movably arranged on the shock absorber cylinder, and two ends of the damping spring are respectively fixed on the upper tray and the lower tray; the locking device comprises a driver and a locking assembly, the locking assembly is respectively matched with the shock absorber cylinder and the lower tray, and the driver is matched with the locking assembly so as to position the lower tray or release the positioning through the locking assembly; the ball screw comprises a screw rod and a nut, the screw rod is arranged on the shock absorber cylinder, the nut vertically moves relative to the screw rod, and the nut is matched with the lower tray to drive the lower tray to vertically move; the driving motor is arranged on the shock absorber cylinder and is matched with the ball screw through a transmission mechanism to drive the nut to move relative to the screw.

According to the suspension system of the automobile, the driving motor, the transmission mechanism and the ball screw are matched to drive the lower tray to vertically move, the purpose of adjusting the height of the automobile body is achieved, the structure is simple and compact, the occupied space is small, the maintenance is convenient, the parts do not need to be replaced regularly, and the use cost is reduced.

In some embodiments of the invention, the screw rod is fixed on the damper cylinder, the driving motor drives the nut to rotate, and a matching assembly is arranged between the nut and the lower tray and is configured to convert the rotation and the movement of the nut into the vertical movement of the lower tray.

In some embodiments of the present invention, the transmission mechanism includes a first speed reduction assembly and a transmission assembly, the transmission assembly includes a first driving wheel, a first driven wheel and a conveyor belt, a motor shaft of the driving motor cooperates with the first driving wheel through the first speed reduction assembly to drive the first driving wheel to rotate, the conveyor belt cooperates with the first driving wheel and the first driven wheel respectively, and the first driven wheel is fixed on the nut or the screw rod.

Preferably, the first reduction assembly is a planetary gear reduction assembly.

In some embodiments of the present invention, the driver is an unlocking motor, the locking assembly includes a self-locking sleeve, a self-locking piece, and a support piece, the support piece is fixed on the shock absorber cylinder, the self-locking piece is disposed on the support piece, the unlocking motor is matched with the self-locking piece to drive the self-locking piece to rotate, the self-locking sleeve is fixed on the lower tray, the self-locking sleeve is provided with at least one sliding groove, the self-locking piece is provided with a locking tongue extending into the sliding groove, each sliding groove is correspondingly provided with a locking portion, the self-locking piece and the self-locking sleeve are positioned when the locking tongue is matched with the locking portion, and the locking tongue can slide in the sliding groove when the locking tongue is separated from the locking portion.

In some embodiments of the present invention, the inner peripheral wall of the sliding groove is provided with a first self-locking tooth extending in a vertical direction to define the locking portion, and the latch tongue is provided with a second self-locking tooth engaged with the first self-locking tooth.

In some embodiments of the present invention, the inner circumferential wall of the sliding groove is provided with a plurality of grooves spaced apart in a vertical direction to define the locking portion, and the locking tongue may extend into or out of the grooves.

In some embodiments of the present invention, the supporting member is a thrust bearing, the thrust bearing includes an upper end cover, a lower end cover and a rotating body, the upper end cover and the lower end cover are fixed on the shock absorber cylinder, the rotating body is rotatably disposed between the upper end cover and the lower end cover, and the self-locking member is fixed on the rotating body.

In some embodiments of the present invention, the number of the sliding grooves is plural, the plural sliding grooves are distributed at intervals in the circumferential direction of the self-locking sleeve, the number of the locking tongues is plural, and the plural locking tongues are matched with the plural sliding grooves in a one-to-one correspondence manner.

In some embodiments of the present invention, a second speed reduction assembly is disposed between the unlocking motor and the self-locking member.

Further, second speed reduction unit includes the second action wheel, the second is followed driving wheel and unblock gear, the second action wheel with the motor shaft cooperation of unblock motor in order by unblock motor drive rotates, the second action wheel with the second is followed driving wheel meshing cooperation, the unblock gear is fixed on the auto-lock spare and with the second is followed driving wheel meshing cooperation.

Preferably, the unlocking motor is a stepping motor.

Preferably, the mating component is a flat thrust bearing.

In some embodiments of the invention, the outer peripheral wall of the spindle is externally covered with a dust cover.

In some embodiments of the present invention, the suspension system further includes a hall sensor for collecting rotation data of the driving motor, a displacement sensor for collecting vertical displacement of the nut is disposed on the shock absorber, and the hall sensor and the displacement sensor are adapted to be respectively connected to a computer of the automobile to form a closed-loop control system.

An automobile according to an embodiment of the present invention includes the suspension system of the automobile according to the above-described embodiment of the present invention.

According to the automobile provided by the embodiment of the invention, the suspension system provided by the embodiment of the invention can be used for adjusting the height of the automobile body, and has the advantages of simple structure, small occupied space, convenience in maintenance, no need of replacing accessories regularly and reduced use cost.

Drawings

FIG. 1 is a schematic view of a suspension system according to some embodiments of the present invention;

FIG. 2 is an assembled schematic view of a portion of the components of the suspension system shown in FIG. 1;

FIG. 3 is an assembled schematic view of a portion of the components of the suspension system shown in FIG. 1;

FIG. 4 is a schematic view of a suspension system according to further embodiments of the present invention;

FIG. 5 is an assembled schematic view of a portion of the components of the suspension system shown in FIG. 4;

FIG. 6 is a schematic view of a locking assembly engaged with a ball screw according to some embodiments of the present invention;

FIGS. 7 and 8 are schematic views of a locking assembly in cooperation with a damper and a ball screw, respectively, in accordance with some embodiments of the present invention;

FIGS. 9 and 10 are schematic views of a latch assembly in cooperation with a damper and a ball screw, according to some embodiments of the present invention, wherein the latch assembly of FIG. 9 positions the lower tray and the latch assembly of FIG. 10 unlocks the lower tray;

FIG. 11 is a schematic diagram of a driver according to some embodiments of the inventions;

FIG. 12 is a cross-sectional view of the driver shown in FIG. 11;

FIG. 13 is a schematic view of the engagement of a support member and a self-locking member according to some embodiments of the present invention;

FIG. 14 is a schematic illustration of the engagement of a support member and a self-locking member according to further embodiments of the present invention;

FIG. 15 is a schematic illustration of the engagement of a support member and a self-locking member according to further embodiments of the present invention;

FIG. 16 is a schematic view of a self-locking sleeve according to some embodiments of the invention;

FIG. 17 is a schematic view of a self-locking collar according to other embodiments of the present invention;

FIG. 18 is a schematic view of the interior of a self-locking sleeve according to still further embodiments of the invention;

FIG. 19 is a schematic view of the combination of the drive motor, the transmission mechanism and the ball screw according to an embodiment of the present invention;

FIG. 20 is a schematic view of the drive motor and gear train in accordance with an embodiment of the present invention;

FIG. 21 is a schematic view of the engagement of a drive motor with a primary planetary gear assembly according to an embodiment of the present invention;

FIG. 22 is a schematic view of the engagement of a drive motor with a central sun gear according to an embodiment of the present invention;

FIG. 23 is a schematic view of a one-stage planetary gear assembly in the transmission according to an embodiment of the present invention;

FIG. 24 is a schematic view of the engagement of the planet gears with the planet carrier in the transmission according to an embodiment of the present invention;

FIG. 25 is a schematic view of a two-stage planetary gear assembly in the transmission according to an embodiment of the present invention;

figure 26 is a schematic view of the protective cover of the first reduction assembly according to an embodiment of the invention;

FIG. 27 is a schematic diagram showing the relationship of various components of a suspension system according to an embodiment of the present invention;

fig. 28 is a control flowchart of the suspension system according to the embodiment of the invention.

Reference numerals:

a suspension system 1000,

A vibration damper 1, a vibration damper cylinder 10, a main shaft 11,

A spring component 2, an upper tray 20, a lower tray 21, a damping spring 22, a relief hole 210,

The locking device 3, the driver 30, the stator 301, the rotor 302, the mating member 303, the counter bore 304, the locking assembly 31, the self-locking sleeve 311, the sliding slot 3111, the locking portion 3112, the mating hole 3113, the self-locking member 312, the locking tongue 3121, the second self-locking teeth 3121a, the mating portion 3122, the support 313, the second speed reduction assembly 32, the second driving wheel 321, the second driven wheel 322, the unlocking gear 323, the locking member 31, the locking member 312,

A ball screw 4, a screw 40, a nut 41,

A driving motor 5,

The transmission mechanism 6, the first speed reducing assembly 60, the central sun gear 601, the primary sun gear 602, the primary planet gear 603, the primary planet carrier 604, the connecting shaft 605, the secondary planet gear 606, the secondary planet carrier 607, the output shaft 608, the transmission assembly 61, the first driving wheel 610, the first driven wheel 611, the transmission belt 612, the second driving wheel 602, the second driving wheel 603 and the transmission belt,

A mating component 7,

A dust cover 8,

A Hall sensor 9,

Fixed shell 15, visor 16, support frame 17, weld nut 18.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A suspension system 1000 of an automobile according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 28, wherein the suspension system 1000 is used for connecting a body and wheels of an automobile, and a plurality of suspension systems 1000 may be provided for each automobile.

As shown in fig. 1 to 5, a suspension system 1000 of an automobile according to an embodiment of the present invention includes: the device comprises a shock absorber 1, a spring assembly 2, a locking device 3, a ball screw 4 and a driving motor 5. The damper 1 includes a damper cylinder 10 and a main shaft 11 telescopically disposed in the damper cylinder 10. It will be understood that the shock absorber 1 can be any shock absorber known in the art, and the working principle of the shock absorber 1 is known in the art and will not be described in detail here.

The spring assembly 2 includes an upper tray 20, a lower tray 21 and a damping spring 22, the upper tray 20 is fixed on the end of the main shaft 11 extending out of the damper cylinder 10, the upper tray 20 is adapted to be fixed on the body of the automobile, the lower tray 21 is vertically movably provided on the damper cylinder 10, and both ends of the damping spring 22 are respectively fixed on the upper tray 20 and the lower tray 21, so that the height of the body can be adjusted by the up-and-down movement of the lower tray 21.

The locking device 3 includes an actuator 30 and a locking assembly 31, the locking assembly 31 is respectively matched with the shock absorber cylinder 10 and the lower tray 21, the actuator 30 is matched with the locking assembly 31 to position or release the lower tray 21 through the locking assembly 31, that is, the lower tray 21 can be positioned on the shock absorber cylinder 10 through the locking assembly 31, namely, the lower tray 21 can not vertically move at this time, and the whole suspension system 1000 is in a locking state. When the lower tray 21 is unseated, the lower tray 21 is vertically movable relative to the shock absorber cylinder 10, and the entire suspension system 1000 is in an unlocked state.

The ball screw 4 comprises a screw 40 and a nut 41, the screw 40 is arranged on the shock absorber cylinder 10, the nut 41 vertically moves relative to the screw 40, and the nut 41 is matched with the lower tray 21 to drive the lower tray 21 to vertically move. It is understood that the matching relationship between the nut 41 and the screw 40 can be divided into a plurality of cases, for example, the screw 40 is fixed on the damper cylinder 10, the nut 41 is rotatable and vertically movable with respect to the screw 40, or the screw 40 is rotatably provided on the damper cylinder 10, and the nut 41 is vertically movable only with respect to the screw 40. It will also be appreciated that when the nut 41 is rotatable relative to the screw 40, an engagement assembly 7 should be provided between the nut 41 and the lower tray 21, the engagement assembly 7 being configured to translate the rotation and movement of the nut 41 into vertical movement of the lower tray 21, thereby ensuring that the lower tray 21 can only move vertically. Preferably, the mating component 7 is a flat thrust bearing, wherein the flat thrust bearing comprises a first part and a second part, the first part being rotatable relative to the second part, the nut 41 resting on the first part and the second part resting on the lower tray 21. It will be appreciated that the principles of operation of the flat thrust bearing are known in the art and will not be described in detail herein.

The driving motor 5 is arranged on the damper cylinder 10, and the driving motor 5 is matched with the ball screw 4 through the transmission mechanism 6 so as to drive the nut 41 to move relative to the screw 40. Specifically, when the screw rod 40 is fixed to the damper cylinder 10, the drive motor 5 drives the nut 41 to rotate through the transmission mechanism 6 so that the nut 41 can move relative to the screw rod 40, and the drive motor 5 should be movably provided on the damper cylinder 10 to move with the nut 41. When the screw 40 is rotatably provided on the damper cylinder 10, the drive motor 5 drives the screw 40 to rotate through the transmission mechanism 6.

When the height of the vehicle body is required, firstly, the actuator 30 drives the locking assembly 31 to enable the lower tray 21 to be positioned, the lower tray 21 can move vertically relative to the shock absorber cylinder 10, then the driving motor 5 drives the ball screw 4 to work through the transmission mechanism 6, so that the nut 41 can move vertically relative to the screw rod 40, and the lower tray 21 is driven to move vertically relative to the shock absorber cylinder 10 in the process of the vertical movement of the nut 41. So that the height of the vehicle body can be adjusted.

When the height of the vehicle body is adjusted to meet the requirement, the driver 30 drives the locking assembly 31 to position the lower tray 21, so that the lower tray 21 is positioned on the shock absorber cylinder 10, namely, the lower tray 21 is not movable, the whole suspension system 1000 is in a locking state, and elastic support between the vehicle body and the wheels is realized through the shock absorber 1 and the shock absorbing spring 22 during the running of the vehicle.

According to the suspension system 1000 of the automobile, the driving motor 5, the transmission mechanism 6 and the ball screw 4 are matched to drive the lower tray 21 to vertically move, so that the purpose of adjusting the height of the automobile body is achieved, the structure is simple and compact, the occupied space is small, the maintenance is convenient, the parts do not need to be replaced regularly, and the use cost is reduced.

In some embodiments of the present invention, the transmission mechanism 6 includes a first speed reduction assembly 60 and a transmission assembly 61, the transmission assembly 61 includes a first driving wheel 610, a first driven wheel 611 and a transmission belt 612, a motor shaft of the driving motor 5 is engaged with the first driving wheel 610 through the first speed reduction assembly 60 to drive the first driving wheel 610 to rotate, the transmission belt 612 is engaged with the first driving wheel 610 and the first driven wheel 611 respectively, and the first driven wheel 611 is fixed on the nut 41 or the screw 40. Specifically, when the driving motor 5 operates, the driving motor 5 drives the first driving wheel 610 to rotate through the first speed reducing assembly 60, the first driving wheel 610 drives the first driven wheel 611 to rotate through the transmission belt 612, and the first driven wheel 611 drives the nut 41 or the screw 40 to rotate when rotating. Thereby making the structure of the transmission mechanism 6 simple.

Specifically, the first driving wheel 610 may be a pulley, the first driven wheel 611 may be a pulley, and the transmission belt 612 may be a belt; or the first driving wheel 610 may be a sprocket, the first driven wheel 611 may be a sprocket, and the conveyor belt 612 may be a chain. It will of course be appreciated that the construction of the transmission assembly 61 is not limited thereto and that, for example, two meshing gears may be provided to achieve the transmission purpose through a geared transmission. In a specific example of the present invention, the first driven wheel 611 is sleeved on the nut 41 and is interference-fitted with the nut 41. In some examples of the invention, the radius of first drive pulley 610 is less than the radius of first driven pulley 611.

In some preferred embodiments of the present invention, the first reduction assembly 60 is a planetary gear reduction assembly, so that a large transmission ratio can be obtained by providing the planetary gear reduction assembly, and the transmission efficiency is high. Specifically, as shown in fig. 20 to fig. 25, the first speed reduction assembly 60 includes a central sun gear 601, a primary planet gear 603, a primary planet carrier 604, a primary sun gear 602, a secondary planet gear 606, and a secondary planet carrier 607, the central sun gear 601 is sleeved on a motor shaft of the driving motor 5, the primary planet gear 603 is fixed on the primary planet carrier 604, the primary planet gear 603 is meshed with the central sun gear 601, the primary sun gear 602 is sleeved on a connecting shaft 605 fixed on the primary planet carrier 604, the secondary planet gear 606 is fixed on the secondary planet carrier 607, and the secondary planet gear 606 is meshed with the primary sun gear 602. Thereby driving center sun gear 601 rotates when driving motor 5 moves, center sun gear 601 drives the rotation of one-level planet wheel 603 in order to realize the one-level speed reduction, one-level planet wheel 603 drives one-level planet carrier 604 and rotates, one-level planet carrier 604 drives one-level sun gear 602 and rotates, one-level sun gear 602 drives the rotation of second grade planet wheel 606 in order to realize the second grade rotational speed, second grade planet wheel 606 drives second grade planet carrier 607 and rotates, be equipped with output shaft 608 on the second grade planet carrier 607, first action wheel 610 overcoat is in order to rotate through output shaft 608 drive on output shaft 608. Of course, it is understood that the planetary gear speed reduction assembly can also be a one-stage speed reduction assembly or a three-stage and more than three-stage speed reduction assembly. Meanwhile, it can be understood that the number of the primary planet gears 603 and the number of the secondary planet gears 606 can be limited according to actual situations, for example, in a specific example of the present invention, there are four primary planet gears 603 and four secondary planet gears 606.

As shown in fig. 7 to 18, in some embodiments of the present invention, the actuator 30 is an unlocking motor, the locking assembly 31 includes a self-locking sleeve 311, a self-locking member 312 and a support member 313, the support member 313 is fixed on the shock absorber cylinder 10, the self-locking member 312 is disposed on the support member 313, and the unlocking motor 30 is engaged with the self-locking member 312 to drive the self-locking member 312 to rotate, that is, the self-locking member 312 can only rotate relative to the shock absorber cylinder 10. The self-locking sleeve 311 is fixed to the lower tray 21, and specifically, the self-locking sleeve 311 may be fixed to the lower tray 21 by screws. Be equipped with at least one spout 3111 on the auto-lock sleeve 311, be equipped with the spring bolt 3121 that stretches into in the spout 3111 from the locking piece 312, every spout 3111 corresponds and sets up locking portion 3112, and the rotation angle of location from the locking piece 312 when spring bolt 3121 and the cooperation of locking portion 3112, spring bolt 3121 can slide in the spout 3111 when spring bolt 3121 breaks away from with locking portion 3112. Wherein each spout 3111 corresponds and sets up a spring bolt 3121. Optionally, the spout 3111 is a plurality of, and a plurality of spouts 3111 interval distribution in the circumference of auto-lock sleeve 311, and the spring bolt 3121 is a plurality of, and a plurality of spring bolts 3121 and a plurality of spout 3111 one-to-one cooperate.

Specifically, the self-locking piece 312 is rotatable with respect to the self-locking sleeve 311, and when the latch 3121 on the self-locking piece 312 is engaged with the latching portion 3112, the self-locking piece 312 is not rotatable, and the self-locking piece 312 positions the self-locking sleeve 311 on the shock absorber cylinder 10, that is, the lower tray 21 is not vertically movable. When the latch tongue 3121 of the self-locking piece 312 is disengaged from the latching portion 3112, the latch tongue 3121 may slide in the slide groove 3111, so that the self-locking sleeve 311 may vertically move with respect to the shock absorber cylinder 10, that is, the lower tray 21 may vertically move. Therefore, the locking assembly 31 is simple and reliable in structure, convenient to maintain, low in cost and convenient to realize the intellectualization of the automobile chassis. Optionally, the unlocking motor 30 is a stepping motor, and further optionally, the unlocking motor 30 drives the self-locking member 312 to rotate 15 degrees at a time.

In some examples of the present invention, as shown in fig. 15, 17 and 18, the slide groove 3111 is provided on an inner circumferential wall thereof with first self-locking teeth extending in a vertical direction to define a locking portion 3112, and the latch tongue 3121 is provided with second self-locking teeth 3121a engaged with the first self-locking teeth. When the self-locking piece 312 rotates to engage the first self-locking tooth and the second self-locking tooth 3121a, the self-locking piece 312 and the self-locking sleeve 311 are locked and cannot move, and the lower tray 21 is locked. When the self-locking piece 312 rotates to disengage the first self-locking tooth and the second self-locking tooth 3121a, the self-locking sleeve 311 may vertically move with respect to the self-locking piece 312, and the lower tray 21 is unlocked to be vertically movable with respect to the shock absorber cylinder 10. Wherein the unlocking motor 30 can be driven to rotate forward or backward to engage or disengage the first self-locking tooth and the second self-locking tooth 3121 a.

In other examples of the present invention, as shown in fig. 9, 10, 13, 14 and 16, a plurality of grooves are formed on an inner circumferential wall of the sliding groove 3111 at intervals in a vertical direction to define the locking portion 3112, and the latch 3121 may protrude into or out of the grooves. When the latch 3121 on the self-locking piece 312 extends into one of the grooves, the self-locking piece 312 and the self-locking sleeve 311 are locked and cannot move, and the lower tray 21 is locked. When the latch tongue 3121 of the self-locking piece 312 protrudes out of the groove, the self-locking sleeve 311 may vertically move with respect to the self-locking piece 312, and the lower tray 21 is unlocked to be vertically movable with respect to the shock absorber cylinder 10. Wherein the unlocking motor 30 can be driven to rotate forward or backward so that the latch bolt 3121 extends into or out of the groove. When the latch 3121 switches from extending into one recess to extending into the other recess, the shifting process is complete to end the adjustment of the suspension system 1000.

It is understood that when the suspension system 1000 is in the locked state, the weight of the entire vehicle body is borne by the latch tongue 3121, and therefore, in some embodiments of the present invention, when it is required to unlock the suspension system 1000, the nut 41 is driven to vertically move with respect to the screw bar 40 by the driving motor 5, so that the lower tray 21 vertically moves, so that the latch tongue 3121 is separated from the contact of the latching portion 3112 to unload the latch tongue 3121, and then the self-locking member 312 is driven to rotate by the driver 30, so that the latch tongue 3121 is separated from the latching portion 3112. In some embodiments of the present invention, the supporting member 313 is a thrust bearing, and the thrust bearing includes an upper end cap, a lower end cap, and a rotating body, the upper end cap and the lower end cap are fixed on the shock absorber cylinder 10, the rotating body is rotatably disposed between the upper end cap and the lower end cap, and the self-locking member 312 is fixed on the rotating body. Thereby, the reliability strength of the locking device 3 can be improved. It will also be appreciated that the principles of operation of thrust bearings are well known in the art and will not be described in detail herein.

In some embodiments of the present invention, a second speed reduction assembly 32 is provided between the unlocking motor 30 and the self-locking member 312. Further, as shown in fig. 1, 2 and 6, the second speed reducing assembly 32 includes a second driving wheel 321, a second driven wheel 322 and an unlocking gear 323, the second driving wheel 321 is engaged with the motor shaft of the unlocking motor 30 to be driven by the unlocking motor 30 to rotate, the second driving wheel 321 is engaged with the second driven wheel 322, and the unlocking gear 323 is fixed on the self-locking member 312 and engaged with the second driven wheel 322. Specifically, when the unlocking motor 30 is operated, the motor shaft of the unlocking motor 30 drives the second driving wheel 321 to rotate, the second driving wheel 321 is engaged with the second driven wheel 322 to drive the second driven wheel 322 to rotate, the second driven wheel 322 is engaged with the unlocking gear 323 to drive the unlocking gear 323 to rotate, and the unlocking gear 323 drives the self-locking member 312 to rotate when rotating. Specifically, the radius of the second driven wheel 322 is larger than that of the second driving wheel 321, and the radius of the unlocking gear 323 is larger than that of the second driven wheel 322 to achieve two-stage deceleration. It is understood that the structure of the second speed reducing assembly 32 is not limited thereto, and a planetary speed reducer may be used, for example, as long as the unlocking motor 30 can drive the self-locking member 312 to rotate through the second speed reducing assembly 32 and achieve the purpose of speed reduction.

As shown in fig. 1 to 4, in some embodiments of the present invention, a dust cover 8 is covered on the outer peripheral wall of the main shaft 11, and an upper end of the dust cover 8 may be fixed on the upper tray 20, so as to play a role of dust prevention, and prevent foreign matters from entering the suspension system 1000 to affect the service life of the suspension system 1000.

In some embodiments of the present invention, the suspension system 1000 further includes a hall sensor 9 for collecting rotation data of the driving motor 5, a displacement sensor for collecting vertical displacement of the nut 41 is disposed on the shock absorber 1, and the hall sensor 9 and the displacement sensor are adapted to be respectively connected to a vehicle computer (ECU) of the automobile to form a closed-loop control system. Therefore, the traveling crane computer can adjust the rotating speed of the driving motor 5 to adjust the position of the lower tray 21 according to the displacement information acquired by the displacement sensor and the rotating pulse signal of the driving motor 5 acquired by the Hall sensor 9 so as to adjust the height of the vehicle body in real time.

The automobile according to the embodiment of the present invention includes the suspension system 1000 of the automobile according to the above-described embodiment of the present invention.

According to the automobile provided by the embodiment of the invention, the suspension system 1000 provided by the embodiment of the invention can be used for adjusting the height of the automobile body, and has the advantages of simple structure, small occupied space, convenience in maintenance, no need of replacing accessories regularly and reduced use cost.

A suspension system 1000 for an automobile according to several embodiments of the present invention will be described in detail below with reference to fig. 1-28.

Example 1:

as shown in fig. 4 and 5, a suspension system 1000 according to an embodiment of the present invention includes: the device comprises a shock absorber 1, a spring assembly 2, a locking device 3, a ball screw 4 and a driving motor 5. The damper 1 includes a damper cylinder 10 and a main shaft 11 telescopically disposed in the damper cylinder 10.

The spring assembly 2 comprises an upper tray 20, a lower tray 21 and a damping spring 22, wherein the upper tray 20 is fixed on the end part of the main shaft 11 extending out of the shock absorber cylinder 10, the upper tray 20 is suitable for being fixed on the automobile body, the lower tray 21 is sleeved on the shock absorber cylinder 10 and can vertically move relative to the shock absorber cylinder 10, the damping spring 22 is sleeved on the shock absorber 1, and two ends of the damping spring 22 are respectively fixed on the upper tray 20 and the lower tray 21. It will of course be appreciated that the damper spring 22 may also be provided on the outside of the damper 1.

The locking device 3 comprises an unlocking motor 30 and a locking assembly 31, wherein the unlocking motor 30 is a stepping motor, the stepping motor can be connected with a traveling computer of the automobile, and the traveling computer controls the forward rotation/reverse rotation of the stepping motor so as to unlock and lock. The input signal of the unlocking motor 30 is a switching signal of a traveling computer.

Locking assembly 31 includes a self-locking sleeve 311, a self-locking piece 312, and a support 313. The supporting member 313 is a thrust bearing, the upper end cover and the lower end cover of the thrust bearing are respectively fixed on the shock absorber cylinder 10, the self-locking member 312 is fixed on the rotating body of the thrust bearing to be rotatable relative to the upper end cover and the lower end cover of the thrust bearing, the upper surface of the self-locking member 312 is provided with a matching portion 3122, and the matching portion 3122 is a matching groove arranged on the self-locking member 312. A plurality of locking tongues 3121 are provided on the outer circumferential wall of the self-locking member 312.

The self-locking sleeve 311 is formed in a cylindrical shape and fixed on the lower tray 21, the self-locking sleeve 311 is sleeved on the shock absorber cylinder 1, a plurality of sliding grooves 3111 are formed in the inner peripheral wall of the self-locking sleeve 311, a plurality of grooves distributed at intervals in the vertical direction are formed in the inner peripheral wall of each sliding groove 3111 to limit a locking portion 3112, a plurality of locking tongues 3121 are in one-to-one correspondence with the sliding grooves 3111, and each locking tongue 3121 extends into one sliding groove 3111.

The unlocking motor 30 comprises a shell, a stator 301 and a rotor 302, wherein the stator 301 and the rotor 302 are respectively arranged in the shell, the stator 301 and the rotor 302 are matched to drive the rotor 302 to rotate, and the shell is fixed on the shock absorber cylinder 10. Specifically, a plurality of countersunk holes 304 may be formed in the housing, a plurality of weld nuts 18 are formed on the shock absorber cylinder 10, and a plurality of screws respectively pass through the plurality of countersunk holes 304 and cooperate with the plurality of weld nuts 18 to fix the housing on the shock absorber cylinder 10, that is, a screw cooperating with the corresponding weld nut 18 is disposed in each countersunk hole 304. It will of course be appreciated that the manner of securing between the housing and the shock absorber cylinder 10 is not limited thereto and may be, for example, a snap fit.

Rotor 302 is sleeved on main shaft 11 and is in clearance fit with main shaft 11, fitting piece 303 is fixed on rotor 302, and the lower end of fitting piece 303 protrudes out of rotor 302 to define a claw which extends into a fitting groove so that unlocking motor 30 can drive self-locking piece 312 to rotate. Specifically, be equipped with a plurality of cooperation grooves of interval distribution in circumference on from locking piece 312, be equipped with a plurality of jack catchs on the fitting piece 303, a plurality of jack catchs respectively with a plurality of cooperation groove one-to-one cooperation.

When the unlocking motor 30 operates, the rotor 302 rotates, and since the claws fixed to the rotor 302 are engaged with the engagement grooves, the rotor 302 rotates to drive the self-locking member 312 to rotate, and when the self-locking member 312 rotates, each locking tongue 3121 on the self-locking member 312 may extend into or out of the groove. When the latch 3121 is located in one of the grooves, the suspension system 1000 is in a latched state, the weight of the entire vehicle body is borne by the latch 3121 of the self-locking piece 312 of each suspension system 1000, and when the latch 3121 is protruded out of the groove and located in the sliding groove 3111, the suspension system 1000 is in an unlatched state, and the lower tray 21 can be lifted and lowered.

Specifically, before the unlocking motor 30 unlocks (i.e., before the self-locking piece 312 and the self-locking sleeve 311 move relatively), the driving motor 5 operates to unload the latch 3121 of the self-locking piece 312.

The ball screw 4 comprises a screw 40 and a nut 41, the screw 40 is fixed on the damper cylinder 10, the nut 41 can rotate and vertically move relative to the screw 40, a plane thrust bearing is arranged between the nut 41 and the lower tray 21, the plane thrust bearing comprises a first part and a second part, the first part can rotate relative to the second part, the nut 41 is tightly attached to the first part, and the second part is tightly attached to the lower surface of the lower tray 21.

The driving motor 5 is movably arranged on the shock absorber cylinder 10 through the supporting frame 17, and a motor shaft of the driving motor 5 is matched with the nut 41 through the transmission mechanism 6 to rotate through the nut 41. Specifically, the driving motor 5 is a direct current permanent magnet motor, so that the speed regulation range is wide, the control is very simple and convenient, and the control is more accurate.

The transmission mechanism 6 comprises a first speed reduction assembly 60 and a transmission assembly 61, the first speed reduction assembly 60 comprises a central sun gear 601, a first-level planet gear 603, a first-level planet carrier 604, a first-level sun gear 602, a second-level planet gear 606 and a second-level planet carrier 607, the central sun gear 601 is sleeved on a motor shaft of the driving motor 5, the first-level planet gear 603 is fixed on the first-level planet carrier 604, the first-level planet gear 603 is meshed with the central sun gear 601, the first-level sun gear 602 is sleeved on a connecting shaft 605 fixed on the first-level planet carrier 604, the second-level planet gear 606 is fixed on the second-level planet carrier 607, the second-level planet gear.

The transmission assembly 61 comprises a first driving wheel 610, a first driven wheel 611 and a transmission belt 612, wherein the first driving wheel 610 is sleeved on the output shaft 608, the transmission belt 612 is respectively matched with the first driving wheel 610 and the first driven wheel 611, and the first driven wheel 611 is fixed on the nut 41.

When the driving motor 5 operates, the central sun gear 601 is driven to rotate, the central sun gear 601 drives the first-stage planetary gear 603 to rotate to realize first-stage speed reduction, the first-stage planetary gear 603 drives the first-stage planetary gear 604 to rotate, the first-stage planetary gear 604 drives the first-stage sun gear 602 to rotate, the first-stage sun gear 602 drives the second-stage planetary gear 606 to rotate so as to realize second-stage rotating speed, the second-stage planetary gear 606 drives the second-stage planetary gear 607 to rotate, an output shaft 608 on the second-stage planetary gear 607 rotates so as to drive a first driving wheel 610 to rotate, the first driving wheel 610 drives a first driven wheel 611 to rotate through a conveyor belt 612.

The transmission process of the power system force is as follows: the driving motor 5, the first speed reducing component 60, the transmission component 61, the nut 41, the plane thrust bearing and the lower tray 21.

The driving motor 5 and its transmission mechanism 6 are assembled on the fixed housing 15, and the fixed housing 15 integrally connects the driving motor 5 and its transmission mechanism 6 to the lower surface of the lower tray 21. A protective cover 16 is mounted on the fixed housing 15 for supporting the rotation shaft of the first driven wheel 611 and protecting the transmission 6 from dust. The whole power system composed of the driving motor 5 and the transmission mechanism 6 is lifted along with the lifting of the lower tray 21.

The Hall sensor 9 is arranged on the protective cover 16, the shock absorber cylinder 10 is provided with a displacement sensor for detecting the displacement of the nut 41, and the Hall sensor 9 and the displacement sensor are respectively connected with a running computer of a vehicle to form a closed-loop control system. The rotational speed and direction of the drive motor 5 are detected using a hall sensor 9, for example a two-way hall chip MLX 92251. The input signal of the driving motor 5 is from the PWM signal of the running computer.

Specifically, the suspension system 1000 further includes a detection device for detecting whether the latch 3121 is located at the unlock position and the lock position, for example, a travel switch, the detection device is connected to a computer, and the computer controls the operating state of the unlock motor 30 according to a detection result of the detection device. The output signal of the unlocking motor 30 is a switching signal given by the detection means.

Specifically, the specific parameter selection for suspension system 1000 can be as shown in tables 1 and 2 below:

TABLE 1

The first gear lifting time refers to a time taken for the latch bolt 3121 to move from one groove of the sliding groove 3111 to a groove adjacent to the groove, and in short, refers to a time taken for the latch bolt 3121 to switch between two adjacent grooves. More specifically, as shown in fig. 16, each sliding slot 3111 is provided with three grooves to define three gears, and the gear shifting action can be completed in 4 seconds in two adjacent gears. It takes 8 seconds to complete the shift action of the highest gear and the lowest gear, wherein the highest gear corresponds to the recess located at the lowest among the plurality of recesses of the sliding groove 3111, and the lowest gear corresponds to the recess located at the highest among the plurality of recesses of the sliding groove 3111.

TABLE 2

After the suspension system 1000 according to the embodiment of the present invention is installed in an automobile, initialization is performed first, specifically including the following steps: 1. unlocking the motor to work; 2. the feedback of the unlocking feedback signal is completed; 3. the unlocking motor stops; 4. the driving motor 5 downshifts to the lowest gear until the motor is locked; 5. and recording the origin of the system by the driving computer. The default gear of the automobile mounted with the suspension system 1000 according to the embodiment of the present invention is the intermediate gear when the product is shipped.

Example 2:

in this embodiment, unlike embodiment 1 described above, are: the locking device 3 is different in structure. The locking device 3 comprises an unlocking motor 30, a locking assembly 31 and a second speed reducing assembly 32, wherein the unlocking motor 30 is arranged on one side of the self-locking sleeve 311, and the unlocking motor 30 can be fixed on the shock absorber cylinder 10 through a connecting frame. That is, the unlocking motor 30 and the lower tray 21 are relatively moved, and in order to avoid interference between the lower tray 21 and the unlocking motor 30, a relief hole 210 is provided at a position of the lower tray 21 corresponding to the unlocking motor 30.

Locking assembly 31 includes a self-locking sleeve 311, a self-locking piece 312, and a support 313. The support 313 is a thrust bearing, a lower cover of the thrust bearing is fixed to the shock absorber cylinder 10, and the self-locking member 312 is fixed to the upper cover of the thrust bearing to be rotatable with respect to the lower cover of the thrust bearing. A plurality of locking tongues 3121 are provided on the outer circumferential wall of the self-locking member 312.

The self-locking sleeve 311 is formed in a cylindrical shape and fixed to the lower tray 21, a plurality of sliding grooves 3111 are formed in the inner circumferential wall of the self-locking sleeve 311, a plurality of grooves are formed in the inner circumferential wall of each sliding groove 3111 and are distributed at intervals in the vertical direction to define a locking portion 3112, a plurality of locking tongues 3121 are in one-to-one correspondence with the plurality of sliding grooves 3111, and each locking tongue 3121 extends into one sliding groove 3111. A locking portion 3112 is defined by providing a plurality of grooves on each of the slide grooves 3111.

The second speed reducing assembly 32 includes a second driving wheel 321, a second driven wheel 322 and an unlocking gear 323, the second driving wheel 321 is engaged with the motor shaft of the unlocking motor 30 to be driven by the unlocking motor 30 to rotate, the second driving wheel 321 is engaged with the second driven wheel 322, and the unlocking gear 323 is fixed on the self-locking component 312 and engaged with the second driven wheel 322. The unlocking gear 323 may be sleeved on the self-locking member 312 and interference-fitted with the self-locking member 312. The unlocking gear 323 keeps a certain clearance with the ball screw 4, and the unlocking gear 323 is ensured not to be blocked in the working process. Since the self-locking sleeve 311 is located outside the self-locking piece 312, the self-locking sleeve 311 is provided with a fitting hole 3113 for avoiding the second speed reduction assembly 32.

Specifically, the second driven wheel 322 may include an upper intermediate wheel and a lower intermediate wheel, the upper intermediate wheel and the lower intermediate wheel rotate coaxially, the second driving wheel 321 is engaged with the upper intermediate wheel, and the lower intermediate wheel is engaged with the unlocking gear 323, so that the purpose of multi-stage speed reduction may be achieved.

Specifically, when the unlocking motor 30 is operated, the motor shaft of the unlocking motor 30 drives the second driving wheel 321 to rotate, the second driving wheel 321 is engaged with the second driven wheel 322 to drive the second driven wheel 322 to rotate, the second driven wheel 322 is engaged with the unlocking gear 323 to drive the unlocking gear 323 to rotate, and the unlocking gear 323 drives the self-locking member 312 to rotate when rotating. When the self-locking piece 312 rotates, each locking tongue 3121 of the self-locking piece 312 may extend into or out of the groove. When the latch 3121 is located in one of the grooves, the suspension system 1000 is in a latched state, the weight of the entire vehicle body is borne by the latch 3121 of the self-locking piece 312 of each suspension system 1000, and when the latch 3121 is protruded out of the groove and located in the sliding groove 3111, the suspension system 1000 is in an unlatched state, and the lower tray 21 can be lifted and lowered.

It is to be understood that the structure of the self-locking sleeve 311 is not limited to the structures shown in

embodiments

1 and 2, and for example, the self-locking sleeve 311 in

embodiments

1 and 2 may be replaced with the following structure: be equipped with a plurality of spouts 3111 on the internal perisporium of auto-lock sleeve 311, be equipped with the first auto-lock tooth that extends in vertical direction on the internal perisporium of every spout 3111 in order to inject locking portion 3112, be equipped with the second auto-lock tooth 3121a with first auto-lock tooth meshing on the spring bolt 3121, when first auto-lock tooth and second auto-lock tooth 3121a meshing, spring bolt 3121 is in the locking position, when first auto-lock tooth and second auto-lock tooth 3121a separation, spring bolt 3121 is in the unblock position.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A suspension system of an automobile comprises a shock absorber, a spring assembly and a driving motor, wherein the shock absorber comprises a shock absorber cylinder and a main shaft telescopically arranged in the shock absorber cylinder; the suspension system further includes:

the locking device comprises a driver and a locking assembly, the locking assembly is respectively matched with the shock absorber cylinder and the lower tray, and the driver is matched with the locking assembly so as to position the lower tray or release the positioning through the locking assembly;

the ball screw comprises a screw rod and a nut, the screw rod is arranged on the shock absorber cylinder, the nut vertically moves relative to the screw rod, and the nut is matched with the lower tray to drive the lower tray to vertically move;

the driving motor is arranged on the shock absorber cylinder and is matched with the ball screw through a transmission mechanism to drive the nut to move relative to the screw.

2. The suspension system of claim 1, wherein the threaded rod is fixed to the damper cylinder, the drive motor drives the nut to rotate, and a mating assembly is provided between the nut and the lower tray, the mating assembly being configured to translate rotation and movement of the nut into vertical movement of the lower tray.

3. The suspension system of claim 1, wherein the transmission mechanism includes a first speed reduction assembly and a transmission assembly, the transmission assembly includes a first driving wheel, a first driven wheel, and a transmission belt, a motor shaft of the driving motor is engaged with the first driving wheel through the first speed reduction assembly to drive the first driving wheel to rotate, the transmission belt is engaged with the first driving wheel and the first driven wheel respectively, and the first driven wheel is fixed on the nut or the screw.

4. The suspension system of the automobile of claim 3, wherein the first reduction assembly is a planetary gear reduction assembly.

5. The automotive suspension system according to claim 1, wherein the actuator is an unlocking motor, the locking assembly includes a self-locking sleeve, a self-locking member, and a support member, the support member is fixed to the shock absorber cylinder, the self-locking member is disposed on the support member, the unlocking motor is engaged with the self-locking member to drive the self-locking member to rotate, the self-locking sleeve is fixed to the lower tray, the self-locking sleeve is provided with at least one sliding groove, the self-locking member is provided with a locking tongue extending into the sliding groove, each sliding groove is correspondingly provided with a locking portion, the self-locking member and the self-locking sleeve are positioned when the locking tongue is engaged with the locking portion, and the locking tongue can slide in the sliding groove when the locking tongue is disengaged from the locking portion.

6. The suspension system of claim 5, wherein the inner peripheral wall of the slide groove is provided with a first self-locking tooth extending in a vertical direction to define the lock portion, and the latch tongue is provided with a second self-locking tooth engaged with the first self-locking tooth.

7. The suspension system of claim 5, wherein the inner peripheral wall of the slide groove is provided with a plurality of grooves spaced apart in a vertical direction to define the locking portion, and the latch tongue is inserted into or extended out of the grooves.

8. The suspension system of claim 5, wherein the support member is a thrust bearing, the thrust bearing includes an upper end cap, a lower end cap, and a rotating body, the upper end cap and the lower end cap are fixed to the shock absorber cylinder, the rotating body is rotatably provided between the upper end cap and the lower end cap, and the self-locking member is fixed to the rotating body.

9. The suspension system according to any one of claims 5 to 8, wherein the sliding groove is provided in plurality, the sliding grooves are distributed at intervals in the circumferential direction of the self-locking sleeve, the locking tongues are provided in plurality, and the locking tongues are matched with the sliding grooves in a one-to-one correspondence manner.

10. The automotive suspension system of claim 5 wherein a second speed reduction assembly is provided between the unlock motor and the self-locking member.

11. The suspension system of an automobile of claim 10, wherein the second reduction assembly includes a second drive wheel, a second driven wheel, and an unlocking gear, the second drive wheel being engaged with a motor shaft of the unlocking motor to be driven to rotate by the unlocking motor, the second drive wheel being engaged with the second driven wheel, the unlocking gear being fixed to the latching member and engaged with the second driven wheel.

12. The automotive suspension system of claim 5, wherein the unlock motor is a stepper motor.

13. The automotive suspension system of claim 2, wherein the mating component is a flat thrust bearing.

14. The suspension system of claim 1, wherein a dust cover is externally covered on the outer peripheral wall of the main shaft.

15. The automotive suspension system according to claim 1, further comprising a hall sensor for acquiring rotation data of the driving motor, wherein a displacement sensor for acquiring vertical displacement of the nut is provided on the shock absorber, and the hall sensor and the displacement sensor are adapted to be respectively connected to a vehicle computer of the automobile to form a closed-loop control system.

16. An automobile, characterized by comprising a suspension system of an automobile according to any one of claims 1-15.