CN116771841A - Electric control locking multifunctional damper - Google Patents

Abstract

The application relates to an electric control locking multifunctional damper, which relates to the field of dampers and comprises the following components: the cylinder body is internally provided with hydraulic oil; the piston is used for partitioning the cylinder body into a rod cavity and a rodless cavity, and a piston rod for driving the piston to slide is arranged in the rod cavity; the cylinder bottom is provided with a locking hole communicated with the rodless cavity; one end of the long hole runner is communicated with the rod cavity, and the other end of the long hole runner is communicated with the locking hole; the locking valve core is connected with the cylinder bottom in a sliding manner along the length direction of the locking hole and is used for cutting off or opening the communication between the long hole flow channel and the locking hole. When the vehicle runs and vibrates, the piston drives hydraulic oil to exchange between the rod cavity and the rodless cavity through the long hole flow channel, and the resistance of the hydraulic oil flowing through the long hole flow channel resists the movement of the piston to realize shock absorption; when the vehicle is in static work, the locking valve core cuts off the communication between the long hole flow channel and the rodless cavity, hydraulic oil cannot be exchanged between the rod cavity and the rodless cavity, sliding of the piston rod is further prevented, and stability of the vehicle in static work is improved.

Description

Electric control locking multifunctional damper

Technical Field

The application relates to the field of dampers, in particular to an electric control locking multifunctional damper.

Background

The damper is mainly a device for reducing motion energy by utilizing motion resistance so as to slow down or even eliminate mechanical vibration, and is widely applied to various fields such as buildings, bridges, vehicles and the like. Viscous dampers and fluid dampers can be classified according to the principle of drag generation.

In order to improve the running stability of the vehicle, a damper is installed in the conventional vehicle. One end of the damper is connected with the vehicle body, the other end of the damper is connected with the vehicle wheels, a sealed cavity is arranged between the two ends, damping fluid is filled in the cavity, and a slidable piston is arranged in the cavity; when the vehicle jolts or the gravity center shifts, one end of the damper drives the piston to slide in the closed space, the distance between two ends of the damper is changed, the piston presses fluid to flow in a smaller channel, damping force is generated in the fluid flow to slow down the moving speed of the piston, and a plurality of dampers at different positions are mutually matched to realize the damping of the vehicle.

With respect to the related art described above, a damper is indispensable in a vehicle, but for some engineering vehicles or agricultural machines, such as an arm-type platform truck, the center of gravity of which is shifted when standing, the presence of the above-described conventional damper affects the stability of the vehicle when operating.

Disclosure of Invention

In order to improve stability of a vehicle in standing operation, the application provides an electric control locking multifunctional damper.

The application provides an electric control locking multifunctional damper, which adopts the following technical scheme:

an electrically controlled latching multi-function damper comprising: the cylinder body is in a long cylinder shape, fluid is arranged in the cylinder body, and end covers for sealing the cylinder body are arranged at two ends of the cylinder body; the piston is connected in the cylinder body in a sliding manner along the length direction of the cylinder body, the piston partitions the cylinder body into a rod cavity and a rodless cavity, a piston rod for driving the piston to slide is arranged in the rod cavity, one end of the piston rod is connected with the piston, and the other end of the piston rod extends out of the cylinder body and is connected with the cylinder body in a sliding manner; the cylinder bottom is positioned at one end of the rodless cavity, which is far away from the piston, and is provided with a locking hole communicated with the rodless cavity; a long hole runner which is arranged on the side wall of the cylinder body, wherein one end of the long hole runner is communicated with the rod cavity, and the other end of the long hole runner is communicated with the locking hole; the locking valve core is positioned in the locking hole and is in sliding connection with the cylinder bottom along the length direction of the locking hole, the locking valve core is used for cutting off or opening the communication between the long hole flow channel and the locking hole, and the cylinder bottom is provided with a driving piece for driving the locking valve core to slide.

By adopting the technical scheme, when the vehicle runs and vibrates, the piston rod drives the piston to slide in the cylinder body, and the movement of the piston drives fluid to exchange and flow between the rod cavity and the rodless cavity through the long hole flow channel; when the vehicle is in static work, the driving piece drives the locking valve core to slide in the locking hole, the communication between the long hole flow channel and the rodless cavity is cut off, fluid cannot exchange between the rod cavity and the rodless cavity through the long hole flow channel, further the sliding of the piston rod is prevented, and the stability of the vehicle in static work is improved.

Optionally, a throttle block is arranged at one end of the locking hole, which is close to the rodless cavity, a first one-way valve for blocking the fluid flowing from the rodless cavity to the long hole runner is arranged in the throttle block, and a plurality of compression damping holes for communicating the two sides of the throttle block with the locking hole are formed in the throttle block.

By adopting the technical scheme, fluid flows between the rodless cavity and the long hole flow channel through the throttling block, and the first one-way valve enables the piston to move to drive the fluid to flow from the rodless cavity to the long hole flow channel only through the compression damping hole, so that the required compression damping force is provided in the direction.

Optionally, the slot flow channel is provided with a plurality of slots, and the connection part of the slot flow channel and the rod cavity is provided with a stretching damping hole and a second one-way valve for blocking the fluid flowing from the rod cavity to the corresponding slot flow channel.

By adopting the technical scheme, fluid flows between the long hole flow channel and the rod cavity through the second one-way valve and the stretching damping hole, and the second one-way valve enables the piston to move to drive the fluid to flow from the rod cavity to the long hole flow channel only through the stretching damping hole, so that the required stretching damping force is generated.

Optionally, a plurality of long hole runners are communicated with a communication hole between one ends of the long hole runners, which are close to the rod cavity, and the connection part of the communication hole runners and the long hole runners is positioned at one side, which is away from the rod cavity, of the second one-way valve.

Through adopting above-mentioned technical scheme, under the effect of intercommunicating pore, can balance the flow of different slot hole runners, and then balanced cylinder body different positions's atress is favorable to prolonging the life of cylinder body.

Optionally, the cylinder body overcoat is equipped with the shell, is equipped with compensation chamber between shell and the cylinder body, is equipped with coil spring and floating piston in the compensation chamber, and the compensation chamber is separated into two parts by floating piston, and one part is communicated with the locking hole, and another part is used for holding coil spring.

By adopting the technical scheme, when the piston slides, part of fluid flows inside and outside the compensation cavity, and the volume change is compensated and the pressure balance is maintained through the deformation of the spiral spring.

Optionally, the communication parts of the compensation cavity and the long hole runner with the locking hole are distributed along the sliding direction of the locking valve core, and the sliding of the locking valve core can cut off or open the communication between the compensation cavity and the locking hole.

By adopting the technical scheme, the user can control the locking valve core to slide to a state of cutting off the compensation cavity and the locking hole, so that the risk of fluid leakage or pollution is reduced when the compensation cavity is not needed, and the service life is prolonged.

Optionally, the device further comprises a switch valve, wherein the part of the compensation cavity, which is communicated with the locking hole, is also communicated with the outside of the cylinder body, and the switch valve is used for controlling the opening and closing of the filling hole.

By adopting the technical scheme, a user can fill the fluid at the filling hole for supplementing the loss of the fluid or changing the total quantity of the fluid, so that the damping effect can be conveniently adjusted.

Optionally, the driving piece includes miniature motor and threaded rod, miniature motor and cylinder bottom fixed connection, and threaded rod and the coaxial fixed connection of the output shaft of miniature motor, threaded rod and locking case threaded connection.

Through adopting above-mentioned technical scheme, micro motor drives the threaded rod and rotates, can control under the screw thread effect and block the case and slide in the locking downthehole, simple structure, and the drive mode of threaded rod can bear stronger pressure from locking downthehole fluid, and then guarantee locking effect.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the vehicle runs and shakes, the piston rod drives the piston to slide in the cylinder body, and the movement of the piston drives fluid to exchange and flow between the rod cavity and the rodless cavity through the long hole flow channel; when the vehicle is in stationary operation, the driving piece drives the locking valve core to slide in the locking hole, the communication between the long hole flow channel and the rodless cavity is cut off, and fluid cannot exchange between the rod cavity and the rodless cavity through the long hole flow channel, so that the sliding of the piston rod is prevented, and the stability of the vehicle in stationary operation is improved;

2. the miniature motor is powered by 24V, compared with the hydraulic pushing locking, the miniature motor can save large-scale devices such as a pump station and the like, and the cost is saved; the miniature motor drives the threaded rod to rotate, the locking valve core can be controlled to slide in the locking hole under the action of the threads, the structure is simple, and the driving mode of the threaded rod can bear stronger pressure from fluid in the locking hole, so that the locking effect is guaranteed.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a schematic cross-sectional structure of an embodiment of the present application.

Fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Fig. 4 is an enlarged schematic view of a portion B in fig. 2.

Reference numerals illustrate: 1. a cylinder; 11. a rod cavity is arranged; 12. a rodless cavity; 13. a long hole flow passage; 2. a housing; 3. a piston; 31. a piston rod; 4. an end cap; 41. a second one-way valve; 42. stretching the damping hole; 43. a communication hole; 5. a cylinder bottom; 51. a locking hole; 52. locking the valve core; 53. a throttle block; 531. a first one-way valve; 532. compressing the damping hole; 54. a short-hole flow channel; 55. fine pores; 6. a driving member; 61. a micro motor; 62. a threaded rod; 7. a compensation chamber; 71. a coil spring; 72. a floating piston; 73. and filling the hole.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses an electric control locking multifunctional damper.

Referring to fig. 1 and 2, an electric control locking multifunctional damper comprises a shell 2 and a cylinder body 1, wherein the shell 2 and the cylinder body 1 are in cylindrical shapes and are coaxially arranged, two ends of the shell 2 are fixedly connected with end covers 4 for sealing corresponding ends of the cylinder body 1, so that a closed space is formed in the cylinder body 1, the cylinder body 1 is filled with fluid, hydraulic oil is preferred by the fluid in the embodiment, and the electric control locking multifunctional damper has the advantages of high lubricating capacity, heat conducting capacity and the like, and hydraulic oil is not easy to leak or pollute accidentally under the action of the end covers 4. The piston 3 is connected in a sliding manner in the cylinder body 1, the piston 3 is connected with a piston rod 31 extending to the outside from one end cover 4, the end part of the piston rod 31 is connected with a chassis or a vehicle body of the vehicle, the end cover 4 far away from one end of the piston 3 rod is connected with a wheel, and the movement of the piston 3 in the cylinder body 1 can change the whole length of the damper to realize shock absorption.

Referring to fig. 2, the space in the cylinder 1 is partitioned into two parts by the piston 3, and because the cylinder 1 is filled with hydraulic oil, the movement of the piston 3 in the cylinder 1 is hindered by the hydraulic oil on the upper and lower sides of the piston 3, and in order to ensure good damping capacity in the running process of the vehicle, a plurality of long hole flow channels 13 are formed in the side wall of the cylinder 1 for the flow of the hydraulic oil, so that the oil quantity on the upper and lower sides of the piston 3 is changed, and the piston 3 can move smoothly.

Referring to fig. 2, in the present embodiment, four long hole runners 13 are selected, the long hole runners 13 are opened along the length direction of the cylinder 1, and the positions of the four long hole runners 13 are equally spaced around the circumference of the cylinder 1, so that the symmetrical structure is beneficial to prolonging the service life of the cylinder 1.

Referring to fig. 2 and 3, a part of the cylinder 1 containing the piston rod 31 is provided with a rod chamber 11, the other part is provided with a rod-free chamber 12, a cylinder bottom 5 is fixedly installed at one end of the rod-free chamber 12 far from the piston 3, the cylinder bottom 5 is in a cylinder shape coaxial with the cylinder 1, a locking hole 51 is coaxially formed in the cylinder bottom 5, the locking hole 51 is communicated with the rod-free chamber 12, and when a force for moving the piston 3 in the direction of the rod-free chamber 12 is applied through the piston rod 31 during vehicle vibration, hydraulic oil in the rod-free chamber 12 is pressed to flow into the rod-free chamber 12.

Referring to fig. 3, the cylinder bottom 5 is provided with short hole flow passages 54 corresponding to the long hole flow passages 13 one by one, and the short hole flow passages 54 communicate the corresponding long hole flow passages 13 with the locking holes 51, so that the hydraulic oil in the locking holes 51 flows into the long hole flow passages 13 through the short hole flow passages 54.

Referring to fig. 3 and 4, the end cover 4 located at one side of the cylinder body 1 near the rod cavity 11 is provided with stretching damping holes 42 corresponding to the long hole flow channels 13 one by one, and the stretching damping holes 42 communicate one end of the long hole flow channels 13 far away from the short hole flow channels 54 with the rod cavity 11, so that hydraulic oil in the long hole flow channels 13 enters the rod cavity 11 from the stretching damping holes 42, and flow exchange of hydraulic oil between the rodless cavity 12 and the rod cavity 11 is realized.

Referring to fig. 2 and 3, the long hole flow channel 13 is integrally elongated, and the diameter of the short hole flow channel 54 is the same as that of the long hole flow channel 13, so that hydraulic oil is subjected to resistance in the flowing process, and the resistance is transmitted to the piston 3, namely, the damping force for slowing down the moving speed of the piston 3, so that the damping and shock absorption are realized.

Referring to fig. 3, for some vehicles, a strong damping capability is required in a single direction, while a relatively weak damping requirement in the opposite direction is required, a throttle block 53 is installed at one end of the locking hole 51 near the rodless cavity 12, the flow of hydraulic oil in the locking hole 51 is blocked by the throttle block 53, a first check valve 531 is installed in the middle of the throttle block 53, and the first check valve 531 may be a common hydraulic check valve, which is not described in the prior art, but the present embodiment does not explain that the first check valve 531 automatically blocks the flow of hydraulic oil when fluid flows from the rodless cavity 12 into the locking hole 51.

Referring to fig. 3, the throttle block 53 is provided with a plurality of compression damping holes 532, the compression damping holes 532 communicate the locking holes 51 with two sides of the throttle block 53, and under the blocking of the first check valve 531, hydraulic oil can only pass through the throttle block 53 through the compression damping holes 532 at this time, and then enter the rod cavity 11 through the short hole flow passage 54, the long hole flow passage 13 and the stretching damping holes 42. The compression damping hole 532 cooperates with the first check valve 531 to enhance the damping force applied to the movement of the piston 3 toward the rodless chamber 12 at this time, thereby enhancing the shock absorbing capacity in this direction. When the hydraulic oil is restored, the hydraulic oil reversely flows, at the moment, the first one-way valve 531 is deactivated, and the hydraulic oil rapidly returns to the rodless cavity 12 from the compression damping hole 532 and the first one-way valve 531, so that rapid restoration is realized.

Referring to fig. 3, in the present embodiment, the number of the compression damping holes 532 is four, and the compression damping holes 532 are distributed at equal intervals along the circumferential direction of the first check valve 531, so that the flow of hydraulic oil is balanced to the pressures at different positions of the throttle block 53, and the service life is prolonged.

Referring to fig. 4, an annular communication hole 43 is formed in the end cap 4 adjacent to the rod chamber 11, and all the long hole flow passages 13 communicate with the communication hole 43, so that when the piston 3 moves toward the rodless chamber 12, hydraulic oil is collected from all the long hole flow passages 13 into the communication hole 43.

Referring to fig. 4, the end cover 4 is provided with a second check valve 41 and a stretching damping hole 42, the second check valve 41 and the stretching damping hole 42 are both communicated with a communication hole 43, the connection part of the communication hole 43 and the long hole runner 13 is positioned at one side of the second check valve 41 away from the rod cavity 11, and hydraulic oil in the communication hole 43 enters the rod cavity 11 through the second check valve 41 and the stretching damping hole 42.

Referring to fig. 4, the second check valve 41 is preferably a compression compensation valve, when the piston 3 moves to drive hydraulic oil to flow out of the rod cavity 11, the second check valve 41 blocks the hydraulic oil from flowing into the corresponding stretching damping hole 42, and the hydraulic oil can only be discharged out of the rod cavity 11 from the stretching damping hole 42, so that the damping force applied to the piston 3 at the moment is enhanced, and the damping capacity in the direction is enhanced; similarly, when the second check valve 41 fails during resetting, the piston 3 can be quickly reset.

Referring to fig. 4, after hydraulic oil with the rod cavity 11 flows into the stretching damping hole 42, the hydraulic oil is split into all long hole flow channels 13 through the communication holes 43, so that the stress on the side wall of the cylinder body 1 in different directions can be balanced, and the service life can be prolonged.

Referring to fig. 3 and 4, further, when the damping capacity needs to be enhanced in both moving directions of the piston 3, the first check valve 531 and the second check valve 41 can work simultaneously, so as to ensure the damping capacity of the vehicle during driving.

Referring to fig. 2 and 3, when the vehicle is stationary, it is necessary to prevent the piston 3 from moving due to the center of gravity of the vehicle being deviated. A locking valve core 52 sliding along the length direction of the locking hole 51 is arranged in the locking hole 51, a driving piece 6 for driving the locking valve core 52 to move in the locking hole 51 is arranged on the end cover 4 close to the rodless cavity 12, the driving piece 6 comprises a micro motor 61 fixed on the end cover 4, the micro motor is powered by 24V, compared with the common oil pressure pushing locking, the device can save large-scale devices such as a pump station and the like, and the cost is saved; the output shaft of the micro motor 61 is coaxially and fixedly provided with a threaded rod 62, the locking valve core 52 is hollow, the threaded rod 62 coaxially extends into the locking valve core 52 at one side of the locking valve core 52 far away from the rodless cavity 12 and is in threaded connection with the locking valve core 52, a user controls the micro motor 61 to start to drive the threaded rod 62 to rotate, and the locking valve core 52 can be controlled to slide in the locking hole 51 under the action of threads.

Referring to fig. 3, the communication between the short hole flow passage 54 and the locking hole 51 is located on the wall of the locking hole 51, when the locking valve core 52 slides to block the communication between the short hole flow passage 54 and the locking hole 51, the communication between the short hole flow passage 54 and the locking hole 51 is cut off, and the communication between the long hole flow passage 13 and the locking hole 51 is naturally cut off, at this time, hydraulic oil cannot enter the long hole flow passage 13 through the locking hole 51 any more, that is, cannot exchange flow between the rod cavity 11 and the rodless cavity 12 through the long hole flow passage 13, and further, the movement of the piston 3 in the cylinder 1 is prevented, so that the vehicle is more stable during the standing operation.

Referring to fig. 2 and 3, further, a compensating cavity 7 is provided between the housing 2 and the cylinder 1, a floating piston 72 is installed in the compensating cavity 7, the floating piston 72 is annular and is sleeved outside the cylinder 1, the compensating cavity 7 is separated from the blocking block, two parts are formed in the cylinder bottom 5, two fine holes 55 are formed in the connecting part between the locking hole 51 and a part of the compensating cavity 7, which is close to the cylinder bottom 5, and the connecting part between the fine holes 55 and the locking hole 51 and the connecting part between the short hole runner 54 and the locking hole 51 are distributed along the length direction of the locking hole 51, when the locking valve core 52 is located at one end of the locking hole 51, which is far away from the rodless cavity 12, both connecting parts are not blocked by the locking valve core 52, and at this time, the piston 3 moves or hydraulic oil is simultaneously pressed into the short hole runner 54 and the fine holes 55 through the locking hole 51, so that part of hydraulic oil is pressed into the compensating cavity 7, and part of hydraulic oil enters the rod cavity 11.

Referring to fig. 2 and 3, a coil spring 71 is installed in a portion of the compensation chamber 7 which is not communicated with the fine hole 55, one end of the coil spring 71 is abutted against the floating piston 72, the other end of the coil spring is fixedly connected with the end cover 4 in the corresponding direction, hydraulic oil entering the compensation chamber 7 presses the floating piston 72 in a direction away from the cylinder bottom 5, at the moment, the coil spring 71 is compressed to play a role in storing energy, and resilience of the coil spring 71 can enable the hydraulic oil to quickly return to the rodless chamber 12, so that quick return of the piston 3 is realized, and a damping effect is enhanced.

Referring to fig. 2 and 3, the driving member 6 controls the locking valve core 52 to slide to block the communication between the fine hole 55 and the locking hole 51, so that the communication between the compensation chamber 7 and the locking hole 51 can be cut off, and the compensation chamber 7 is disabled, and hydraulic oil leakage or pollution is not easy to occur when the compensation chamber 7 is not needed.

Referring to fig. 2, a filling hole 73 communicated with a compensation cavity 7 is formed in the cylinder bottom 5 and an end cover 4 close to the cylinder bottom 5, the filling hole 73 is communicated with a part where a coil spring 71 is not installed, a switch valve is installed on the end cover 4, the switch valve is closed in a natural state, the communication between the filling hole 73 and the outside is isolated, and the phenomenon of pollution or leakage of hydraulic oil in the cylinder due to the filling hole 73 is not easy to occur; the user can open the switching valve, and fill hydraulic oil into the compensation cavity 7 through the filling hole 73, so that the purposes of oil supplementing or total amount change of hydraulic oil and the like are achieved, and the damping effect is better ensured.

The implementation principle of the electric control locking multifunctional damper provided by the embodiment of the application is as follows: when the vehicle runs and shakes, the piston rod 31 drives the piston 3 to slide in the cylinder body 1, the movement of the piston 3 drives fluid to exchange flow between the rod cavity 11 and the rodless cavity 12 through the long hole flow channel 13, and the resistance to the fluid flow resists the movement of the piston 3, so that the shock absorption is realized; when the vehicle is in a standing state, the micro motor 61 drives the locking valve core 52 to slide in the locking hole 51 through the threaded rod 62, and the communication between the long hole flow channel 13 and the rodless cavity 12 is cut off, so that fluid cannot exchange between the rod cavity 11 and the rodless cavity 12 through the long hole flow channel 13, further the sliding of the piston rod 31 is prevented, and the stability of the vehicle in the standing state is improved.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. An electrically controlled latching multi-functional damper, comprising:

the cylinder body (1), the said cylinder body (1) takes the form of long tube, there is fluid in the cylinder body (1), both ends of the cylinder body (1) have end caps (4) used for sealing the cylinder body (1);

the piston (3) is connected in the cylinder body (1) in a sliding manner along the length direction of the cylinder body (1), the piston (3) partitions the cylinder body (1) into a rod cavity (11) and a rodless cavity (12), a piston rod (31) for driving the piston (3) to slide is arranged in the rod cavity (11), one end of the piston rod (31) is connected with the piston (3), and the other end of the piston rod extends out of the cylinder body (1) and is connected with the cylinder body (1) in a sliding manner;

the cylinder bottom (5) is positioned at one end, far away from the piston (3), in the rodless cavity (12), and the cylinder bottom (5) is provided with a locking hole (51) communicated with the rodless cavity (12);

a long hole runner (13) which is arranged on the side wall of the cylinder body (1), one end of the long hole runner (13) is communicated with the rod cavity (11), and the other end is communicated with the locking hole (51);

the locking valve core (52) is positioned in the locking hole (51) and is in sliding connection with the cylinder bottom (5) along the length direction of the locking hole (51) and is used for cutting off or opening the communication between the long hole runner (13) and the locking hole (51), and the cylinder bottom (5) is provided with a driving piece (6) for driving the locking valve core (52) to slide.

2. An electrically controlled latching multi-function damper according to claim 1, wherein: one end, close to the rodless cavity (12), in the locking hole (51) is provided with a throttling block (53), a first one-way valve (531) used for blocking fluid from flowing from the rodless cavity (12) to the long hole runner (13) is arranged in the throttling block (53), and the throttling block (53) is provided with a plurality of compression damping holes (532) which are used for communicating the parts, located at two sides of the throttling block (53), of the locking hole (51).

3. An electrically controlled latching multi-function damper according to claim 2, wherein: the long hole flow channels (13) are provided with a plurality of long hole flow channels (13), and the communicating parts of the long hole flow channels (13) and the rod cavity (11) are provided with stretching damping holes (42) and second one-way valves (41) for blocking fluid from flowing from the rod cavity (11) to the corresponding long hole flow channels (13).

4. An electrically controlled latching multi-functional damper according to claim 3, wherein: a plurality of long hole flow channels (13) are communicated with one ends, close to the rod cavity (11), of the connecting holes (43), and the connecting positions of the connecting holes (43) and the long hole flow channels (13) are located on one side, away from the rod cavity (11), of the second one-way valve (41).

5. An electrically controlled latching multi-function damper according to claim 1, wherein: the cylinder body (1) is sleeved with a shell (2), a compensation cavity (7) is arranged between the shell (2) and the cylinder body (1), a spiral spring (71) and a floating piston (72) are arranged in the compensation cavity (7), the compensation cavity (7) is partitioned into two parts by the floating piston (72), one part is communicated with the locking hole (51), and the other part is used for accommodating the spiral spring (71).

6. An electrically controlled latching multi-functional damper according to claim 5, wherein: the communication parts of the compensation cavity (7) and the long hole runner (13) and the locking hole (51) are distributed along the sliding direction of the locking valve core (52), and the sliding of the locking valve core (52) can cut off or open the communication between the compensation cavity (7) and the locking hole (51).

7. An electrically controlled latching multi-functional damper according to claim 5, wherein: the automatic filling device is characterized by further comprising a switch valve, wherein the part, communicated with the locking hole (51), of the compensation cavity (7) is also communicated with the outside of the cylinder body (1) to form a filling hole (73), and the switch valve is used for controlling the opening and closing of the filling hole (73).

8. An electrically controlled latching multi-function damper according to claim 1, wherein: the driving piece (6) comprises a micro motor (61) and a threaded rod (62), the micro motor (61) is fixedly connected with the cylinder bottom (5), the threaded rod (62) is fixedly connected with an output shaft of the micro motor (61) in a coaxial mode, and the threaded rod (62) is in threaded connection with the locking valve core (52).