CN219911605U

CN219911605U - Locking vibration damper

Info

Publication number: CN219911605U
Application number: CN202320991527.XU
Authority: CN
Inventors: 于龙; 赵澎; 王庆; 刘杰; 宫树森
Original assignee: Beijing Xingye Dayuan Technology Co ltd
Current assignee: Beijing Xingye Dayuan Technology Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-10-27
Anticipated expiration: 2033-04-27

Abstract

The utility model discloses a locking shock absorber, which belongs to the technical field of vehicle vibration reduction and aims to solve the problem that wheels and suspensions thereof cannot be fixed under special working condition requirements, and the locking shock absorber comprises a piston rod (1), a cylinder barrel (2) and a shell (3), wherein the cylinder barrel (2) is static relative to the shell (3), a rod cavity (4) and a rodless cavity (5) are arranged in the cylinder barrel (2), an outer hydraulic cavity (6) is formed between the cylinder barrel (2) and the shell (3), liquid damping media (7) are arranged in the rod cavity (4), the rodless cavity (5) and the outer hydraulic cavity (6), and a first locking valve (331) and a second locking valve (341) are arranged in the shell (3). The locking shock absorber has a locking function, can be locked or unlocked according to the requirement, and can be realized by the locking function of the shock absorber when the vehicle is required to fix the wheels and the suspensions thereof.

Description

Locking vibration damper

Technical Field

The utility model relates to the technical field of vehicle vibration reduction, in particular to a locking vibration absorber.

Background

The vibration damper is an important component of a vehicle suspension system, and has the functions of absorbing the energy of impact vibration caused by uneven pavement and converting the energy into heat energy to be consumed, so that the vibration of a frame and a vehicle body is quickly damped, and the travelling comfort and smoothness of the vehicle are improved.

The shock absorber needs to meet the requirements of strong shock-extinguishing capability, good heat dissipation performance, stable operation and durability and reliability. The general shock absorber has no locking function, when some vehicles (such as a motor home or a medical vehicle) are parked, the vehicle body can shake due to activities of internal personnel or external environmental influences (such as strong wind and the like), and at the moment, an additional support is needed to be added at the bottom of the vehicle; for example, after an amphibious vehicle is launched, the wheels and the suspensions thereof are required to be fixed, and an additional fixing mechanism is added in the traditional method. Both cases require complex operations and the additional addition of mechanisms results in redundancy and heaviness.

Disclosure of Invention

In order to solve the problems of complex operation and redundant and heavy mechanism of the vehicle when the wheels and the suspensions thereof are fixed, the utility model provides a locking shock absorber which has a locking function and can be locked or unlocked according to the needs, can avoid adding redundant mechanisms when the wheels and the suspensions thereof are fixed, and has simple operation and high reliability.

The technical scheme adopted for solving the technical problems is as follows:

the locking shock absorber comprises a piston rod, a cylinder barrel and a shell which are sequentially sleeved from inside to outside, wherein the cylinder barrel is static relative to the shell, a rod cavity and a rodless cavity are arranged in the cylinder barrel, an outer hydraulic cavity is formed between the cylinder barrel and the shell, and liquid damping media are arranged in the rod cavity, the rodless cavity and the outer hydraulic cavity; the side wall of the cylinder barrel is provided with a rod cavity liquid discharge flow passage, a rod cavity liquid inlet flow passage, a rodless cavity liquid discharge flow passage and a rodless cavity liquid inlet flow passage, wherein the rod cavity liquid discharge flow passage is communicated with a rod cavity and an outer hydraulic cavity, the rod cavity liquid inlet flow passage is communicated with the rod cavity and the outer hydraulic cavity, the rodless cavity liquid discharge flow passage is communicated with the rodless cavity and the outer hydraulic cavity, and the rodless cavity liquid inlet flow passage is communicated with the rodless cavity and the outer hydraulic cavity; a rod cavity liquid discharge one-way valve is arranged in the rod cavity liquid discharge flow passage, a rod cavity liquid inlet one-way valve is arranged in the rod cavity liquid inlet flow passage, a rod cavity liquid discharge one-way valve is arranged in the rod cavity liquid discharge flow passage, and a rod cavity liquid inlet one-way valve is arranged in the rod cavity liquid inlet flow passage; the shell is provided with a first pressure liquid inlet, a first pressure liquid flow passage is arranged in the shell, a first locking valve is arranged in the first pressure liquid flow passage, the first pressure liquid flow passage is connected with the first pressure liquid inlet, and the first pressure liquid flow passage corresponds to the liquid discharge flow passage with the rod cavity; when the first pressure liquid inlet is used for pressurizing the first pressure liquid flow channel, the first locking valve can enable the liquid damping medium in the rod cavity not to enter the outer hydraulic cavity through the rod cavity liquid discharge flow channel; or the shell is provided with a second pressure liquid inlet, a second pressure liquid flow passage is arranged in the shell, a second locking valve is arranged in the second pressure liquid flow passage, the second pressure liquid flow passage is connected with the second pressure liquid inlet, and the second pressure liquid flow passage corresponds to the rodless cavity liquid drainage flow passage; when the second pressure liquid inlet is used for pressurizing the second pressure liquid flow channel, the second locking valve can enable the liquid damping medium in the rodless cavity not to enter the outer hydraulic cavity through the rodless cavity liquid discharge flow channel; or, a first pressure liquid inlet and a second pressure liquid inlet are formed in the shell, a first pressure liquid flow passage and a second pressure liquid flow passage are formed in the shell, a first locking valve is arranged in the first pressure liquid flow passage, a second locking valve is arranged in the second pressure liquid flow passage, the first pressure liquid flow passage is connected with the first pressure liquid inlet, the second pressure liquid flow passage is connected with the second pressure liquid inlet, the first pressure liquid flow passage corresponds to the rod cavity liquid drainage flow passage, and the second pressure liquid flow passage corresponds to the rodless cavity liquid drainage flow passage; when the first pressure liquid inlet is used for pressurizing the first pressure liquid flow channel, the first locking valve can enable the liquid damping medium in the rod cavity not to enter the outer hydraulic cavity through the rod cavity liquid discharge flow channel; when the second pressure liquid inlet is used for pressurizing the second pressure liquid flow channel, the second locking valve can enable the liquid damping medium in the rodless cavity not to enter the outer hydraulic cavity through the rodless cavity liquid discharge flow channel.

When the shell is provided with a first pressure liquid inlet, a first pressure liquid flow passage is arranged in the shell, a first locking valve is arranged in the first pressure liquid flow passage, the first pressure liquid flow passage is connected with the first pressure liquid inlet, and the first pressure liquid flow passage corresponds to the liquid discharge flow passage with the rod cavity; or, a first pressure liquid inlet and a second pressure liquid inlet are formed in the shell, a first pressure liquid flow passage and a second pressure liquid flow passage are formed in the shell, a first locking valve is arranged in the first pressure liquid flow passage, a second locking valve is arranged in the second pressure liquid flow passage, the first pressure liquid flow passage is connected with the first pressure liquid inlet, the second pressure liquid flow passage is connected with the second pressure liquid inlet, the first pressure liquid flow passage corresponds to the rod cavity liquid drainage flow passage, and the second pressure liquid flow passage corresponds to the rodless cavity liquid drainage flow passage; when the pressure in the first pressure liquid channel is relieved, the liquid damping medium in the rod cavity can enter the outer hydraulic cavity through the liquid drainage channel of the rod cavity; when the shell is provided with a second pressure liquid inlet, a second pressure liquid flow passage is arranged in the shell, a second locking valve is arranged in the second pressure liquid flow passage, the second pressure liquid flow passage is connected with the second pressure liquid inlet, and the second pressure liquid flow passage corresponds to the rodless cavity liquid discharge flow passage; or, a first pressure liquid inlet and a second pressure liquid inlet are formed in the shell, a first pressure liquid flow passage and a second pressure liquid flow passage are formed in the shell, a first locking valve is arranged in the first pressure liquid flow passage, a second locking valve is arranged in the second pressure liquid flow passage, the first pressure liquid flow passage is connected with the first pressure liquid inlet, the second pressure liquid flow passage is connected with the second pressure liquid inlet, the first pressure liquid flow passage corresponds to the rod cavity liquid drainage flow passage, and the second pressure liquid flow passage corresponds to the rodless cavity liquid drainage flow passage; and when the pressure in the second pressure liquid flow channel is relieved, the liquid damping medium in the rodless cavity can enter the outer hydraulic cavity through the liquid discharge flow channel of the rodless cavity.

An air chamber is arranged in the outer hydraulic cavity.

The side wall of the cylinder barrel comprises a rod cavity end wall, a side peripheral wall and a rodless cavity end wall which are connected in sequence, a rod cavity liquid drain flow passage is positioned in the rod cavity end wall or the side peripheral wall, a rod cavity liquid inlet flow passage is positioned in the rod cavity end wall or the side peripheral wall, a rodless cavity liquid drain flow passage is positioned in the side peripheral wall or the rodless cavity end wall, and a rodless cavity liquid inlet flow passage is positioned in the side peripheral wall or the rodless cavity end wall.

When the shell is provided with a first pressure liquid inlet, a first pressure liquid flow passage is arranged in the shell, a first locking valve is arranged in the first pressure liquid flow passage, the first pressure liquid flow passage is connected with the first pressure liquid inlet, and the first pressure liquid flow passage corresponds to the liquid discharge flow passage with the rod cavity; or, a first pressure liquid inlet and a second pressure liquid inlet are formed in the shell, a first pressure liquid flow passage and a second pressure liquid flow passage are formed in the shell, a first locking valve is arranged in the first pressure liquid flow passage, a second locking valve is arranged in the second pressure liquid flow passage, the first pressure liquid flow passage is connected with the first pressure liquid inlet, the second pressure liquid flow passage is connected with the second pressure liquid inlet, the first pressure liquid flow passage corresponds to the rod cavity liquid drainage flow passage, and the second pressure liquid flow passage corresponds to the rodless cavity liquid drainage flow passage; the first blocking valve comprises a first valve core and a first spring, when the first pressure liquid inlet is used for pressurizing the first pressure liquid flow channel, the first valve core can seal the rod cavity liquid discharge flow channel, or the first valve core can be abutted with the rod cavity liquid discharge check valve, and the rod cavity liquid discharge check valve is kept in a closed state.

When the shell is provided with a second pressure liquid inlet, a second pressure liquid flow passage is arranged in the shell, a second locking valve is arranged in the second pressure liquid flow passage, the second pressure liquid flow passage is connected with the second pressure liquid inlet, and the second pressure liquid flow passage corresponds to the rodless cavity liquid discharge flow passage; or, a first pressure liquid inlet and a second pressure liquid inlet are formed in the shell, a first pressure liquid flow passage and a second pressure liquid flow passage are formed in the shell, a first locking valve is arranged in the first pressure liquid flow passage, a second locking valve is arranged in the second pressure liquid flow passage, the first pressure liquid flow passage is connected with the first pressure liquid inlet, the second pressure liquid flow passage is connected with the second pressure liquid inlet, the first pressure liquid flow passage corresponds to the rod cavity liquid drainage flow passage, and the second pressure liquid flow passage corresponds to the rodless cavity liquid drainage flow passage; the second blocking valve comprises a second valve core and a second spring, when the second pressure liquid inlet is used for pressurizing the second pressure liquid flow channel, the second valve core can be abutted with the rodless cavity liquid draining one-way valve, and the rodless cavity liquid draining one-way valve can be kept in a closed state, or the second valve core can be used for closing the rodless cavity liquid draining flow channel.

The rod cavity liquid discharge one-way valve and the rodless cavity liquid discharge one-way valve are damping one-way valves, or the rod cavity liquid inlet one-way valve and the rodless cavity liquid inlet one-way valve are damping one-way valves, or the rod cavity liquid discharge one-way valve, the rod cavity liquid inlet one-way valve, the rodless cavity liquid discharge one-way valve and the rodless cavity liquid inlet one-way valve are damping one-way valves.

When the rod cavity liquid discharge one-way valve and the rodless cavity liquid discharge one-way valve are damping one-way valves, the rod cavity liquid discharge one-way valve and the rodless cavity liquid discharge one-way valve both comprise a third valve core and a third spring which are sequentially connected, and the rod cavity liquid inlet one-way valve and the rodless cavity liquid inlet one-way valve both comprise the third valve core which is sequentially connected; when the rod cavity liquid inlet check valve and the rodless cavity liquid inlet check valve are damping check valves, the rod cavity liquid inlet check valve and the rodless cavity liquid inlet check valve respectively comprise a third valve core and a third spring which are connected in sequence, and the rod cavity liquid outlet check valve and the rodless cavity liquid outlet check valve respectively comprise a third valve core which is connected in sequence; when the rod cavity liquid draining one-way valve, the rod cavity liquid inlet one-way valve, the rodless cavity liquid draining one-way valve and the rodless cavity liquid inlet one-way valve are all damping one-way valves, the rod cavity liquid draining one-way valve, the rodless cavity liquid inlet one-way valve and the rodless cavity liquid inlet one-way valve all comprise a third valve core and a third spring which are connected in sequence.

The beneficial effects of the utility model are as follows: the locking shock absorber has a locking function, can be locked or unlocked as required, keeps a vehicle body stable when the vehicle is parked when the vehicle is required to fix wheels and a suspension thereof, can avoid adding a redundant mechanism without shaking, and is simple to operate and high in reliability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic view of a lockup damper according to the present utility model.

Fig. 2 is an enlarged schematic view of the portion a in fig. 1.

Fig. 3 is an enlarged schematic view of the portion B in fig. 1.

Fig. 4 is a schematic view of the lockup damper of the present utility model during compression.

FIG. 5 is a schematic view of a lockup damper of the present utility model during a stretching process.

FIG. 6 is a schematic view of the lockup damper of the present utility model as it is pulled toward the lockup process.

Fig. 7 is a schematic view of the lockup damper of the present utility model when pressed against a lockup process.

FIG. 8 is a schematic view of a lockup damper according to the present utility model during a two-way lockup process.

Fig. 9 is a schematic illustration of the communication of a first pilot operated oil line and a second pilot operated oil line.

1. A piston rod; 2. a cylinder; 3. a housing; 4. a rod cavity is arranged; 5. a rodless cavity; 6. an outer hydraulic chamber; 7. a liquid damping medium; 8. a gas chamber; 9. a dust cover;

21. a rod cavity liquid discharge runner is arranged; 22. a rod cavity liquid inlet flow passage is arranged; 23. a rodless cavity drain flow channel; 24. a rodless cavity liquid inlet flow passage; 25. a rod cavity liquid discharge one-way valve is arranged; 26. a rod cavity liquid inlet one-way valve; 27. a rod-free cavity liquid discharge one-way valve; 28. a rodless cavity liquid inlet one-way valve; 29. a rod cavity end wall; 210. a side peripheral wall; 211. a rodless cavity end wall;

31. a first pressure fluid inlet; 32. a second pressure fluid inlet; 33. a first pressure fluid flow passage; 34. a second pressure fluid flow passage;

331. a first latching valve; 332. a first valve core; 333. a first spring;

341. a second latching valve; 342. a second valve core; 343. and a second spring.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The locking shock absorber comprises a piston rod 1, a cylinder barrel 2 and a shell 3 which are sleeved in sequence from inside to outside, wherein the cylinder barrel 2 is static relative to the shell 3, a rod cavity 4 and a rodless cavity 5 are arranged in the cylinder barrel 2, a part of the piston rod 1 is positioned in the rod cavity 4, an outer hydraulic cavity 6 is formed between the cylinder barrel 2 and the shell 3, and liquid damping media 7 are arranged in the rod cavity 4, the rodless cavity 5 and the outer hydraulic cavity 6; the side wall of the cylinder barrel 2 is provided with a rod cavity liquid discharge flow passage 21, a rod cavity liquid inlet flow passage 22, a rodless cavity liquid discharge flow passage 23 and a rodless cavity liquid inlet flow passage 24, wherein the rod cavity liquid discharge flow passage 21 is communicated with the rod cavity 4 and the outer hydraulic cavity 6, the rod cavity liquid inlet flow passage 22 is communicated with the rod cavity 4 and the outer hydraulic cavity 6, the rodless cavity liquid discharge flow passage 23 is communicated with the rodless cavity 5 and the outer hydraulic cavity 6, and the rodless cavity liquid inlet flow passage 24 is communicated with the rodless cavity 5 and the outer hydraulic cavity 6; a rod cavity liquid discharge one-way valve 25 is arranged in the rod cavity liquid discharge flow passage 21, a rod cavity liquid inlet one-way valve 26 is arranged in the rod cavity liquid inlet flow passage 22, a rod cavity liquid discharge one-way valve 27 is arranged in the rod cavity liquid discharge flow passage 23, and a rod cavity liquid inlet one-way valve 28 is arranged in the rod cavity liquid inlet flow passage 24; the shell 3 is provided with a first pressure liquid inlet 31, a first pressure liquid flow channel 33 is arranged in the shell 3, a first locking valve 331 is arranged in the first pressure liquid flow channel 33, the first pressure liquid flow channel 33 is connected with the first pressure liquid inlet 31, and the first pressure liquid flow channel 33 corresponds to the rod cavity liquid discharge flow channel 21; when the first pressure fluid inlet 31 pressurizes the first pressure fluid flow path 33, the first blocking valve 331 can prevent the liquid damping medium 7 in the rod cavity 4 from entering the outer hydraulic cavity 6 through the rod cavity drain flow path 21; or, the shell 3 is provided with a second pressure liquid inlet 32, a second pressure liquid flow channel 34 is arranged in the shell 3, a second blocking valve 341 is arranged in the second pressure liquid flow channel 34, the second pressure liquid flow channel 34 is connected with the second pressure liquid inlet 32, and the second pressure liquid flow channel 34 corresponds to the rodless cavity liquid discharge flow channel 23; when the second pressure fluid inlet 32 pressurizes the second pressure fluid flow path 34, the second blocking valve 341 can prevent the liquid damping medium 7 in the rodless chamber 5 from entering the outer hydraulic chamber 6 through the rodless chamber drain flow path 23; or, a first pressure liquid inlet 31 and a second pressure liquid inlet 32 are arranged on the shell 3, a first pressure liquid flow channel 33 and a second pressure liquid flow channel 34 are arranged in the shell 3, a first blocking valve 331 is arranged in the first pressure liquid flow channel 33, a second blocking valve 341 is arranged in the second pressure liquid flow channel 34, one end of the first pressure liquid flow channel 33 is connected with the first pressure liquid inlet 31, one end of the second pressure liquid flow channel 34 is connected with the second pressure liquid inlet 32, the other end of the first pressure liquid flow channel 33 corresponds to the rod cavity liquid drain flow channel 21, and the other end of the second pressure liquid flow channel 34 corresponds to the rod cavity liquid drain flow channel 23; when the first pressure fluid inlet 31 pressurizes the first pressure fluid flow path 33, the first blocking valve 331 can prevent the liquid damping medium 7 in the rod cavity 4 from entering the outer hydraulic cavity 6 through the rod cavity drain flow path 21; when the second pressure fluid inlet 32 pressurizes the second pressure fluid flow path 34, the second blocking valve 341 prevents the liquid damping medium 7 in the rodless chamber 5 from entering the outer hydraulic chamber 6 through the rodless chamber drain flow path 23, as shown in fig. 1 to 3.

When the housing 3 is provided with the first pressure fluid inlet 31, the housing 3 is provided with the first pressure fluid channel 33, the housing 3 is not provided with the second pressure fluid inlet 32, and the housing 3 is not provided with the second pressure fluid channel 34, the locking damper has only a pull-to-lock function, and in this case, the second pressure fluid inlet 32, the second pressure fluid channel 34, and the second locking valve 341 are not included in fig. 1.

When the second pressure fluid inlet 32 is provided in the housing 3, the second pressure fluid flow channel 34 is provided in the housing 3, the first pressure fluid inlet 31 is not provided in the housing 3, and the first pressure fluid flow channel 33 is not provided in the housing 3, the locking damper has only a pressing locking function, and it is understood that the first pressure fluid inlet 31, the first pressure fluid flow channel 33, and the first locking valve 331 are not included in fig. 1.

When the first and second pressure fluid inlets 31 and 32 are provided at the same time on the housing 3, and the first and second pressure fluid passages 33 and 34 are provided at the same time in the housing 3, the locking damper has both a pull-to-lock function and a press-to-lock function, as shown in fig. 1 to 3.

When the shell 3 is provided with the first pressure liquid inlet 31, the shell 3 is internally provided with the first pressure liquid flow passage 33, the first pressure liquid flow passage 33 is internally provided with the first locking valve 331, the first pressure liquid flow passage 33 is connected with the first pressure liquid inlet 31, and the first pressure liquid flow passage 33 corresponds to the rod cavity liquid discharge flow passage 21; or, the casing 3 is provided with a first pressure liquid inlet 31 and a second pressure liquid inlet 32, the casing 3 is internally provided with a first pressure liquid flow passage 33 and a second pressure liquid flow passage 34, the first pressure liquid flow passage 33 is internally provided with a first locking valve 331, the second pressure liquid flow passage 34 is internally provided with a second locking valve 341, the first pressure liquid flow passage 33 is connected with the first pressure liquid inlet 31, the second pressure liquid flow passage 34 is connected with the second pressure liquid inlet 32, the first pressure liquid flow passage 33 corresponds to the rod cavity liquid drain flow passage 21, and the second pressure liquid flow passage 34 corresponds to the rodless cavity liquid drain flow passage 23; when the pressure in the first pressure liquid flow passage 33 is released, the liquid damping medium 7 in the rod cavity 4 can enter the outer hydraulic cavity 6 through the rod cavity liquid discharge flow passage 21.

When the housing 3 is provided with the second pressure liquid inlet 32, the housing 3 is internally provided with the second pressure liquid flow passage 34, the second pressure liquid flow passage 34 is internally provided with the second locking valve 341, the second pressure liquid flow passage 34 is connected with the second pressure liquid inlet 32, and the second pressure liquid flow passage 34 corresponds to the rodless cavity liquid discharge flow passage 23; or, the casing 3 is provided with a first pressure liquid inlet 31 and a second pressure liquid inlet 32, the casing 3 is internally provided with a first pressure liquid flow passage 33 and a second pressure liquid flow passage 34, the first pressure liquid flow passage 33 is internally provided with a first locking valve 331, the second pressure liquid flow passage 34 is internally provided with a second locking valve 341, the first pressure liquid flow passage 33 is connected with the first pressure liquid inlet 31, the second pressure liquid flow passage 34 is connected with the second pressure liquid inlet 32, the first pressure liquid flow passage 33 corresponds to the rod cavity liquid drain flow passage 21, and the second pressure liquid flow passage 34 corresponds to the rodless cavity liquid drain flow passage 23; when the pressure in the second pressure liquid flow passage 34 is released, the liquid damping medium 7 in the rodless cavity 5 can enter the outer hydraulic cavity 6 through the rodless cavity liquid discharge flow passage 23.

Wherein the liquid damping medium 7 is a prior art product. The locking shock absorber can be in an upright state, the axis of the piston rod 1, the axis of the cylinder barrel 2 and the axis of the shell 3 are overlapped, the cylinder barrel 2 and the shell 3 are connected and fixed into a whole, the upper end of the piston rod 1 is a mounting end, the upper end of the piston rod 1 is located outside the cylinder barrel 2, the lower end of the piston rod 1 is located inside the cylinder barrel 2, the lower end of the shell 3 is a mounting end, the upper part of the shell 3 is sleeved outside the cylinder barrel 2, an air chamber 8 is arranged in an outer hydraulic cavity 6, a plastic or rubber film is arranged between the air chamber 8 and a liquid damping medium 7, air is arranged in the air chamber 8, the volume of the air chamber 8 can be reduced when the air chamber 8 is pressurized, and the volume of the air chamber 8 can be increased when the air chamber is depressurized. The lock-up damper may be used in an upright state, an inclined state, or a horizontal state.

In this embodiment, the side wall of the cylinder tube 2 includes a rod chamber end wall 29, a side peripheral wall 210 and a rodless chamber end wall 211 which are connected in this order from top to bottom, a part of the outer hydraulic chamber 6 is located between the upper portion of the housing 3 and the side peripheral wall 210, another part of the outer hydraulic chamber 6 is located between the lower portion of the housing 3 and the rodless chamber end wall 211, the rod chamber drain flow passage 21 is located in the rod chamber end wall 29 or the side peripheral wall 210, the rod chamber drain flow passage 22 is located in the rod chamber end wall 29 or the side peripheral wall 210, the rodless chamber drain flow passage 23 is located in the side peripheral wall 210 or the rodless chamber end wall 211, and the rodless chamber drain flow passage 24 is located in the side peripheral wall 210 or the rodless chamber end wall 211.

For example, the rod chamber drain flow channel 21 and the rod chamber inlet flow channel 22 are both located in the side peripheral wall 210, and the rod-less chamber drain flow channel 23 and the rod-less chamber inlet flow channel 24 are both located in the rod-less chamber end wall 211. A dust cover 9 is arranged between the upper end of the piston rod 1 and the upper end of the cylinder tube 2, and the dust cover 9 is sleeved outside the piston rod 1, as shown in fig. 1 to 3.

In this embodiment, the rod cavity drain flow channel 21, the rod cavity liquid inlet flow channel 22, the rodless cavity drain flow channel 23 and the rodless cavity liquid inlet flow channel 24 are in parallel connection, the rod cavity drain flow channel 21 and the rod cavity liquid inlet flow channel 22 are both located at the upper part of the rod cavity 4, and the rodless cavity drain flow channel 23 and the rodless cavity liquid inlet flow channel 24 are both located below the rodless cavity 5.

The outlet end of the rod-cavity drain flow channel 21 and the outlet end of the rod-cavity intake flow channel 22 may be shared, for example, as shown in fig. 1, and the outlet end of the rod-cavity drain flow channel 21 and the outlet end of the rod-cavity intake flow channel 22 are both located on the right side of the cylinder tube 2. Alternatively, the outlet end of the rod-side liquid discharge flow passage 21 and the outlet end of the rod-side liquid feed flow passage 22 may not be shared, for example, the rod-side liquid feed flow passage 22 and the rod-side liquid discharge flow passage 21 may be located on the left and right sides of the cylinder tube 2, respectively. The first pressure fluid inlet 31 and the second pressure fluid inlet 32 are arranged up and down.

The liquid damping medium 7 in the rod cavity 4 can only enter the outer hydraulic cavity 6 through the rod cavity liquid drain flow passage 21, the liquid damping medium 7 in the outer hydraulic cavity 6 can only enter the rod cavity 4 through the rod cavity liquid inlet flow passage 22, the liquid damping medium 7 in the rodless cavity 5 can only enter the outer hydraulic cavity 6 through the rodless cavity liquid drain flow passage 23, and the liquid damping medium 7 in the outer hydraulic cavity 6 can only enter the rodless cavity 5 through the rodless cavity liquid inlet flow passage 24.

The liquid damping medium 7 in the rod cavity 4 cannot enter the outer hydraulic cavity 6 through the rod cavity liquid inlet flow passage 22, the liquid damping medium 7 in the outer hydraulic cavity 6 cannot enter the rod cavity 4 through the rod cavity liquid outlet flow passage 21, the liquid damping medium 7 in the rodless cavity 5 cannot enter the outer hydraulic cavity 6 through the rodless cavity liquid inlet flow passage 24, and the liquid damping medium 7 in the outer hydraulic cavity 6 cannot enter the rodless cavity 5 through the rodless cavity liquid outlet flow passage 23.

In the present embodiment, the first latching valve 331 includes a first valve body 332 and a first spring 333 connected in sequence, the first spring 333 is connected to the housing 3, the first valve body 332 is located at the other end of the first pressure fluid flow path 33, and the first spring 333 can provide a restoring force to the first valve body 332.

When the first pressure liquid flow passage 33 is pressurized through the first pressure liquid inlet 31, the first valve spool 332 can close the rod chamber drain flow passage 21, or the first valve spool 332 can abut against the rod chamber drain check valve 25 and hold the rod chamber drain check valve 25 in a closed state (in this case, the configuration and connection relationship of the first valve spool 332 and the first spring 333 can refer to the configuration and connection relationship of the second valve spool 342 and the second spring 343 in fig. 1, the configuration and connection relationship of the first valve spool 332 and the first spring 333 are the same as the configuration and connection relationship of the second valve spool 342 and the second spring 343 in fig. 1), so that the liquid damping medium 7 in the rod chamber 4 cannot enter the outer hydraulic chamber 6 through the rod chamber drain flow passage 21.

When the pressure in the first pressure fluid flow path 33 is released through the first pressure fluid inlet 31, the first spring 333 can reset the first valve spool 332, and accordingly, the first valve spool 332 can no longer close the rod chamber drain flow path 21, or the first valve spool 332 can no longer abut against the rod chamber drain check valve 25, and the rod chamber drain check valve 25 resumes the one-way switching function, so that the liquid damping medium 7 in the rod chamber 4 can enter the outer hydraulic chamber 6 through the rod chamber drain flow path 21, as shown in fig. 1 to 3.

In the present embodiment, the second latching valve 341 includes a second valve element 342 and a second spring 343 connected in sequence, the second spring 343 being connected to the housing 3, the second valve element 342 being located at the other end of the second pressure fluid flow passage 34, the second spring 343 being capable of providing a restoring force to the second valve element 342.

When the second pressure liquid flow passage 34 is pressurized through the second pressure liquid inlet 32, the second valve element 342 can abut against the rodless chamber drain check valve 27 and keep the rodless chamber drain check valve 27 in a closed state, or the second valve element 342 can close the rodless chamber drain flow passage 23 (in this case, the configuration and connection relationship of the second valve element 342 and the second spring 343 can be referred to the configuration and connection relationship of the first valve element 332 and the first spring 333 in fig. 1, the configuration and connection relationship of the second valve element 342 and the second spring 343 are the same as the configuration and connection relationship of the first valve element 332 and the first spring 333 in fig. 1), so that the liquid damping medium 7 in the rodless chamber 5 cannot enter the outer hydraulic chamber 6 through the rodless chamber drain flow passage 23.

When the pressure in the second pressure fluid flow passage 34 is released through the second pressure fluid inlet 32, the second spring 343 can reset the second valve element 342, and accordingly, the second valve element 342 can no longer abut against the rodless chamber drain check valve 27, the rodless chamber drain check valve 27 resumes the one-way switching function, or the second valve element 342 can no longer close the rodless chamber drain flow passage 23, so that the liquid damping medium 7 in the rodless chamber 5 can enter the outer hydraulic chamber 6 through the rodless chamber drain flow passage 23.

In this embodiment, the rod chamber drain check valve 25 and the rodless chamber drain check valve 27 are both damping check valves, and the rod chamber inlet check valve 26 and the rodless chamber inlet check valve 28 are both normal check valves. Alternatively, the rod cavity liquid inlet check valve 26 and the rod cavity liquid inlet check valve 28 are damping check valves, and the rod cavity liquid outlet check valve 25 and the rod cavity liquid outlet check valve 27 are common check valves. Or the rod cavity liquid discharge one-way valve 25, the rod cavity liquid inlet one-way valve 26, the rodless cavity liquid discharge one-way valve 27 and the rodless cavity liquid inlet one-way valve 28 are all damping one-way valves. The damping check valve comprises a third valve core and a third spring which are connected in sequence, the common check valve comprises the third valve core and an anti-falling connecting piece which are connected in sequence, the anti-falling connecting piece can prevent the third valve core from separating from the cylinder barrel 2, and the anti-falling connecting piece can be a rope.

Specifically, when the rod cavity liquid discharge one-way valve 25 and the rodless cavity liquid discharge one-way valve 27 are damping one-way valves, the rod cavity liquid discharge one-way valve 25 and the rodless cavity liquid discharge one-way valve 27 respectively comprise a third valve core and a third spring which are sequentially connected, and the rod cavity liquid inlet one-way valve 26 and the rod cavity liquid inlet one-way valve 28 respectively comprise the third valve core and the anti-drop connecting piece which are sequentially connected;

when the rod cavity liquid inlet check valve 26 and the rodless cavity liquid inlet check valve 28 are damping check valves, the rod cavity liquid inlet check valve 26 and the rodless cavity liquid inlet check valve 28 respectively comprise a third valve core and a third spring which are sequentially connected, and the rod cavity liquid outlet check valve 25 and the rodless cavity liquid outlet check valve 27 respectively comprise a third valve core and an anti-drop connecting piece which are sequentially connected;

when the rod cavity liquid discharge one-way valve 25, the rod cavity liquid inlet one-way valve 26, the rodless cavity liquid discharge one-way valve 27 and the rodless cavity liquid inlet one-way valve 28 are all damping one-way valves, the rod cavity liquid discharge one-way valve 25, the rod cavity liquid inlet one-way valve 26, the rodless cavity liquid discharge one-way valve 27 and the rodless cavity liquid inlet one-way valve 28 all comprise the third valve core and the third spring which are connected in sequence.

The third valve core is located in or at the end of the rod cavity liquid draining flow passage 21, the rod cavity liquid inlet flow passage 22, the rodless cavity liquid draining flow passage 23 and the rodless cavity liquid inlet flow passage 24, the third spring is connected with the cylinder barrel 2, and the third spring can provide restoring force for the third valve core, as shown in fig. 1 to 3.

The operation of the lock-up damper is described below.

The vehicle hydraulic servo system is connected with a first pressure fluid inlet 31 of the locking damper through a first hydraulic oil pipe, and the vehicle hydraulic servo system is connected with a second pressure fluid inlet 32 of the locking damper through a second hydraulic oil pipe.

1. Compression process

During compression, the piston rod 1 moves downwards relative to the cylinder barrel 2, the piston rod 1 gradually penetrates into the cylinder barrel 2, the volume of the rod cavity 4 is increased, the volume of the rodless cavity 5 is reduced, the liquid damping medium 7 in the rodless cavity 5 is forced to flow into the outer hydraulic cavity 6 through the rodless cavity liquid discharge check valve 27 (which can be called as a check damping valve), part of the liquid damping medium 7 in the outer hydraulic cavity 6 flows into the rod cavity 4 through the rod cavity liquid inlet check valve 26, and the compression damping function of the shock absorber is mainly realized by the rodless cavity liquid discharge check valve 27. Since the piston rod 1 is pressed into the shock absorber, the volume in which the piston rod 1 is pressed is the volume in which the air chamber 8 is compressed, as shown in fig. 4.

2. Stretching process

When the piston rod 1 moves upwards relative to the cylinder barrel 2 during stretching, the piston rod 1 gradually pulls out of the cylinder barrel 2, the volume of the rod cavity 4 is reduced, the volume of the rodless cavity 5 is increased, the liquid damping medium 7 in the rod cavity 4 is forced to flow back to the outer hydraulic cavity 6 through the rod cavity liquid discharge check valve 25 (which can be called a check damping valve), part of the liquid damping medium 7 in the outer hydraulic cavity 6 flows into the rodless cavity 5 through the rodless cavity liquid inlet check valve 28, the air chamber 8 expands, and the volume reduced by pulling out of the piston rod 1 is supplemented, as shown in fig. 5.

3. Pulling-on latching process

The driver controls the hydraulic servo system to provide a high-pressure oil source for the shock absorber through the first hydraulic oil pipe, namely, the first pressure liquid inlet 31 pressurizes the first pressure liquid flow channel 33, hydraulic oil pushes the valve core of the first locking valve 331 to pull the shock absorber to an oil way to be closed (the rod cavity liquid discharge flow channel 21 is closed), at the moment, the liquid damping medium 7 is sealed in the rod cavity 4, the liquid damping medium 7 in the rod cavity 4 cannot be discharged, and the shock absorber is pulled to be locked. As shown in fig. 6.

When the servo system releases the pressure in the first pressure fluid channel 33 through the first pressure fluid inlet 31, the first valve core 332 of the first locking valve 331 is retracted and restored to the initial position by the first spring 333, the rod cavity 4 and the outer hydraulic cavity 6 can be re-communicated through the rod cavity liquid discharge channel 21, and the damper is restored to the damping working state, namely, the pulling-to-locking state is released.

4. Press-lock process

The driver controls the hydraulic servo system to provide a high-pressure oil source for the shock absorber through the second hydraulic oil pipe, namely, the second pressure fluid inlet 32 pressurizes the second pressure fluid channel 34, hydraulic oil pushes the second valve core 342 of the second locking valve 341 to abut against the third valve core of the rodless cavity liquid discharge check valve 27, the rodless cavity liquid discharge check valve 27 keeps a closed state, at the moment, the liquid damping medium 7 is sealed in the rodless cavity 5, the liquid damping medium 7 in the rodless cavity 5 cannot be discharged, and the shock absorber is pressed and locked. As shown in fig. 7.

When the servo system relieves the pressure in the second pressure fluid flow passage 34 through the second pressure fluid inlet 32, the second valve core 342 of the second blocking valve 341 is retracted by the second spring 343 to return to the original position, the rodless chamber 5 and the outer hydraulic chamber 6 can be re-communicated through the rodless chamber drain flow passage 23, and the shock absorber is restored to the shock absorbing operation state, that is, the pressing to the blocking state is released.

5. Bidirectional locking process

The driver controls the hydraulic servo system to provide a high-pressure oil source for the shock absorber simultaneously through the first hydraulic oil pipe and the second hydraulic oil pipe, hydraulic oil pushes the first valve core 332 of the first locking valve 331 to pull the shock absorber to an oil way to be closed, hydraulic oil pushes the second valve core 342 of the second locking valve 341 to close the rod-free cavity liquid discharge one-way valve 27 of the shock absorber, at the moment, the liquid damping medium 7 is sealed in the rod cavity 4 and the rod-free cavity 5, the liquid damping medium 7 in the rod cavity 4 cannot be discharged, the liquid damping medium 7 in the rod-free cavity 5 cannot be discharged, and the shock absorber is locked in a two-way mode, as shown in fig. 8.

When the servo system relieves pressure in the first pressure fluid flow passage 33 through the first pressure fluid inlet 31 and in the second pressure fluid flow passage 34 through the second pressure fluid inlet 32, the first valve core 332 of the first locking valve 331 is retracted by the first spring 333 to return to the initial position, the rod chamber 4 and the outer hydraulic chamber 6 can be re-communicated through the rod chamber drain flow passage 21, the second valve core 342 of the second locking valve 341 is retracted by the second spring 343 to return to the initial position, the rod-free chamber 5 and the outer hydraulic chamber 6 can be re-communicated through the rod-free chamber drain flow passage 23, and the shock absorber is restored to the shock absorbing operation state.

The first hydraulic oil pipe and the second hydraulic oil pipe may not be communicated, as shown in fig. 1, and the first hydraulic oil pipe and the second hydraulic oil pipe are respectively connected with two hydraulic oil sources in a one-to-one correspondence manner, so that a pulling locking function or a pressing locking pulling function can be independently realized, and a bidirectional locking function (a pulling locking function and a pressing locking function) can also be simultaneously realized. The first hydraulic oil pipe and the second hydraulic oil pipe can also be communicated, at this time, the first hydraulic oil pipe and the second hydraulic oil pipe are both connected with a hydraulic oil source, and at this time, only a bidirectional locking function can be realized, as shown in fig. 9.

In addition, for the convenience of understanding and description, the present utility model is expressed by an absolute positional relationship, in which the azimuth term "upper" indicates the upper direction in fig. 1, the azimuth term "lower" indicates the lower direction in fig. 1, the azimuth term "left" indicates the left direction in fig. 1, and the azimuth term "right" indicates the right direction in fig. 1, unless otherwise specified. The present utility model is described using the perspective of a user or reader, but such directional terms are not to be interpreted or construed as limiting the scope of the present utility model.

The foregoing description of the embodiments of the utility model is not intended to limit the scope of the utility model, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the utility model shall fall within the scope of the patent. In addition, the technical features and technical features, technical features and technical scheme, technical scheme and technical scheme, and embodiments of the utility model can be freely combined for use.

Claims

1. The locking shock absorber is characterized by comprising a piston rod (1), a cylinder barrel (2) and a shell (3) which are sleeved in sequence from inside to outside, wherein the cylinder barrel (2) is static relative to the shell (3), a rod cavity (4) and a rodless cavity (5) are arranged in the cylinder barrel (2), an outer hydraulic cavity (6) is formed between the cylinder barrel (2) and the shell (3), and liquid damping mediums (7) are arranged in the rod cavity (4), the rodless cavity (5) and the outer hydraulic cavity (6);

the side wall of the cylinder barrel (2) is provided with a rod cavity liquid discharge flow passage (21), a rod cavity liquid inlet flow passage (22), a rodless cavity liquid discharge flow passage (23) and a rodless cavity liquid inlet flow passage (24), the rod cavity liquid discharge flow passage (21) is communicated with a rod cavity (4) and an outer hydraulic cavity (6), the rod cavity liquid inlet flow passage (22) is communicated with the rod cavity (4) and the outer hydraulic cavity (6), the rodless cavity liquid discharge flow passage (23) is communicated with the rodless cavity (5) and the outer hydraulic cavity (6), and the rodless cavity liquid inlet flow passage (24) is communicated with the rodless cavity (5) and the outer hydraulic cavity (6);

a rod cavity liquid discharge one-way valve (25) is arranged in the rod cavity liquid discharge flow passage (21), a rod cavity liquid inlet one-way valve (26) is arranged in the rod cavity liquid inlet flow passage (22), a rod-free cavity liquid discharge one-way valve (27) is arranged in the rod-free cavity liquid discharge flow passage (23), and a rod-free cavity liquid inlet one-way valve (28) is arranged in the rod-free cavity liquid inlet flow passage (24);

a first pressure liquid inlet (31) is formed in the shell (3), a first pressure liquid flow passage (33) is formed in the shell (3), a first locking valve (331) is arranged in the first pressure liquid flow passage (33), the first pressure liquid flow passage (33) is connected with the first pressure liquid inlet (31), and the first pressure liquid flow passage (33) corresponds to the rod cavity liquid discharge flow passage (21); when the first pressure liquid inlet (31) is used for pressurizing the first pressure liquid flow channel (33), the first locking valve (331) can prevent the liquid damping medium (7) in the rod cavity (4) from entering the outer hydraulic cavity (6) through the rod cavity drain flow channel (21);

or a second pressure liquid inlet (32) is formed in the shell (3), a second pressure liquid flow passage (34) is formed in the shell (3), a second locking valve (341) is arranged in the second pressure liquid flow passage (34), the second pressure liquid flow passage (34) is connected with the second pressure liquid inlet (32), and the second pressure liquid flow passage (34) corresponds to the rodless cavity liquid drainage flow passage (23); when the second pressure liquid inlet (32) is used for pressurizing the second pressure liquid flow channel (34), the second locking valve (341) can prevent the liquid damping medium (7) in the rodless cavity (5) from entering the outer hydraulic cavity (6) through the rodless cavity liquid discharge flow channel (23);

or, a first pressure liquid inlet (31) and a second pressure liquid inlet (32) are formed in the shell (3), a first pressure liquid flow channel (33) and a second pressure liquid flow channel (34) are formed in the shell (3), a first blocking valve (331) is arranged in the first pressure liquid flow channel (33), a second blocking valve (341) is arranged in the second pressure liquid flow channel (34), the first pressure liquid flow channel (33) is connected with the first pressure liquid inlet (31), the second pressure liquid flow channel (34) is connected with the second pressure liquid inlet (32), the first pressure liquid flow channel (33) corresponds to the rod cavity liquid drainage flow channel (21), and the second pressure liquid flow channel (34) corresponds to the rodless cavity liquid drainage channel (23); when the first pressure liquid inlet (31) is used for pressurizing the first pressure liquid flow channel (33), the first locking valve (331) can prevent the liquid damping medium (7) in the rod cavity (4) from entering the outer hydraulic cavity (6) through the rod cavity drain flow channel (21); when the second pressure fluid inlet (32) pressurizes the second pressure fluid flow path (34), the second blocking valve (341) can prevent the liquid damping medium (7) in the rodless cavity (5) from entering the outer hydraulic cavity (6) through the rodless cavity drain flow path (23).

2. The lockup damper according to claim 1 wherein the damper is disposed between the damper,

when a first pressure liquid inlet (31) is formed in the shell (3), a first pressure liquid flow channel (33) is formed in the shell (3), a first locking valve (331) is arranged in the first pressure liquid flow channel (33), the first pressure liquid flow channel (33) is connected with the first pressure liquid inlet (31), and the first pressure liquid flow channel (33) corresponds to the rod cavity liquid drainage flow channel (21); or, a first pressure liquid inlet (31) and a second pressure liquid inlet (32) are formed in the shell (3), a first pressure liquid flow channel (33) and a second pressure liquid flow channel (34) are formed in the shell (3), a first locking valve (331) is arranged in the first pressure liquid flow channel (33), a second locking valve (341) is arranged in the second pressure liquid flow channel (34), the first pressure liquid flow channel (33) is connected with the first pressure liquid inlet (31), the second pressure liquid flow channel (34) is connected with the second pressure liquid inlet (32), the first pressure liquid flow channel (33) corresponds to the rod cavity liquid drainage flow channel (21), and the second pressure liquid flow channel (34) corresponds to the rodless cavity liquid drainage channel (23); when the pressure in the first pressure liquid flow passage (33) is relieved, the liquid damping medium (7) in the rod cavity (4) can enter the outer hydraulic cavity (6) through the rod cavity liquid discharge flow passage (21);

when the second pressure liquid inlet (32) is arranged on the shell (3), a second pressure liquid flow passage (34) is arranged in the shell (3), a second locking valve (341) is arranged in the second pressure liquid flow passage (34), the second pressure liquid flow passage (34) is connected with the second pressure liquid inlet (32), and the second pressure liquid flow passage (34) corresponds to the rodless cavity liquid discharge flow passage (23); or, a first pressure liquid inlet (31) and a second pressure liquid inlet (32) are formed in the shell (3), a first pressure liquid flow channel (33) and a second pressure liquid flow channel (34) are formed in the shell (3), a first locking valve (331) is arranged in the first pressure liquid flow channel (33), a second locking valve (341) is arranged in the second pressure liquid flow channel (34), the first pressure liquid flow channel (33) is connected with the first pressure liquid inlet (31), the second pressure liquid flow channel (34) is connected with the second pressure liquid inlet (32), the first pressure liquid flow channel (33) corresponds to the rod cavity liquid drainage flow channel (21), and the second pressure liquid flow channel (34) corresponds to the rodless cavity liquid drainage channel (23); when the pressure in the second pressure liquid flow passage (34) is released, the liquid damping medium (7) in the rodless cavity (5) can enter the outer hydraulic cavity (6) through the rodless cavity liquid discharge flow passage (23).

3. A lock-up damper according to claim 1, characterized in that an air chamber (8) is provided in the outer hydraulic chamber (6).

4. The lockup damper according to claim 1, characterized in that the side wall of the cylinder (2) contains a rod chamber end wall (29), a side peripheral wall (210) and a rodless chamber end wall (211) connected in this order, the rod chamber drain flow passage (21) is located in the rod chamber end wall (29) or the side peripheral wall (210), the rod chamber liquid intake flow passage (22) is located in the rod chamber end wall (29) or the side peripheral wall (210), the rodless chamber drain flow passage (23) is located in the side peripheral wall (210) or the rodless chamber end wall (211), and the rodless chamber liquid intake flow passage (24) is located in the side peripheral wall (210) or the rodless chamber end wall (211).

5. The lockup damper according to claim 1 wherein the damper is disposed between the damper,

when a first pressure liquid inlet (31) is formed in the shell (3), a first pressure liquid flow channel (33) is formed in the shell (3), a first locking valve (331) is arranged in the first pressure liquid flow channel (33), the first pressure liquid flow channel (33) is connected with the first pressure liquid inlet (31), and the first pressure liquid flow channel (33) corresponds to the rod cavity liquid drainage flow channel (21); or, a first pressure liquid inlet (31) and a second pressure liquid inlet (32) are formed in the shell (3), a first pressure liquid flow channel (33) and a second pressure liquid flow channel (34) are formed in the shell (3), a first locking valve (331) is arranged in the first pressure liquid flow channel (33), a second locking valve (341) is arranged in the second pressure liquid flow channel (34), the first pressure liquid flow channel (33) is connected with the first pressure liquid inlet (31), the second pressure liquid flow channel (34) is connected with the second pressure liquid inlet (32), the first pressure liquid flow channel (33) corresponds to the rod cavity liquid drainage flow channel (21), and the second pressure liquid flow channel (34) corresponds to the rodless cavity liquid drainage channel (23);

the first blocking valve (331) includes a first valve element (332) and a first spring (333), and when the first pressure fluid flow path (33) is pressurized through the first pressure fluid inlet (31), the first valve element (332) can close the rod cavity drain flow path (21), or the first valve element (332) can be abutted against the rod cavity drain check valve (25) and keep the rod cavity drain check valve (25) in a closed state.

6. The lockup damper according to claim 1 wherein the damper is disposed between the damper,

when the second pressure liquid inlet (32) is arranged on the shell (3), a second pressure liquid flow passage (34) is arranged in the shell (3), a second locking valve (341) is arranged in the second pressure liquid flow passage (34), the second pressure liquid flow passage (34) is connected with the second pressure liquid inlet (32), and the second pressure liquid flow passage (34) corresponds to the rodless cavity liquid discharge flow passage (23); or, a first pressure liquid inlet (31) and a second pressure liquid inlet (32) are formed in the shell (3), a first pressure liquid flow channel (33) and a second pressure liquid flow channel (34) are formed in the shell (3), a first locking valve (331) is arranged in the first pressure liquid flow channel (33), a second locking valve (341) is arranged in the second pressure liquid flow channel (34), the first pressure liquid flow channel (33) is connected with the first pressure liquid inlet (31), the second pressure liquid flow channel (34) is connected with the second pressure liquid inlet (32), the first pressure liquid flow channel (33) corresponds to the rod cavity liquid drainage flow channel (21), and the second pressure liquid flow channel (34) corresponds to the rodless cavity liquid drainage channel (23);

the second blocking valve (341) comprises a second valve core (342) and a second spring (343), when the second pressure liquid inlet (32) is used for pressurizing the second pressure liquid flow channel (34), the second valve core (342) can be abutted against the rodless cavity liquid discharge one-way valve (27) and keep the rodless cavity liquid discharge one-way valve (27) in a closed state, or the second valve core (342) can seal the rodless cavity liquid discharge flow channel (23).

7. The lockup damper according to claim 1, characterized in that the rod chamber drain check valve (25) and the rodless chamber drain check valve (27) are damping check valves, or the rod chamber feed check valve (26) and the rodless chamber feed check valve (28) are damping check valves, or the rod chamber drain check valve (25), the rod chamber feed check valve (26), the rodless chamber drain check valve (27) and the rodless chamber feed check valve (28) are damping check valves.

8. The lockup damper according to claim 1 wherein the damper is disposed between the damper,

when the rod cavity liquid discharge one-way valve (25) and the rodless cavity liquid discharge one-way valve (27) are damping one-way valves, the rod cavity liquid discharge one-way valve (25) and the rodless cavity liquid discharge one-way valve (27) respectively comprise a third valve core and a third spring which are sequentially connected, and the rod cavity liquid inlet one-way valve (26) and the rod cavity liquid inlet one-way valve (28) respectively comprise the third valve cores which are sequentially connected;

when the rod cavity liquid inlet one-way valve (26) and the rodless cavity liquid inlet one-way valve (28) are damping one-way valves, the rod cavity liquid inlet one-way valve (26) and the rodless cavity liquid inlet one-way valve (28) respectively comprise the third valve core and the third spring which are sequentially connected, and the rod cavity liquid outlet one-way valve (25) and the rodless cavity liquid outlet one-way valve (27) respectively comprise the third valve core which are sequentially connected;

when the rod cavity liquid draining one-way valve (25), the rod cavity liquid inlet one-way valve (26), the rodless cavity liquid draining one-way valve (27) and the rodless cavity liquid inlet one-way valve (28) are all damping one-way valves, the rod cavity liquid draining one-way valve (25), the rod cavity liquid inlet one-way valve (26), the rodless cavity liquid draining one-way valve (27) and the rodless cavity liquid inlet one-way valve (28) all comprise a third valve core and a third spring which are sequentially connected.