CN221503866U

CN221503866U - Double-loop electric control nitrogen shock absorber for automobile

Info

Publication number: CN221503866U
Application number: CN202420272603.6U
Authority: CN
Inventors: 李童华
Original assignee: Dongguan Zongwei Auto Parts Co ltd
Current assignee: Dongguan Zongwei Auto Parts Co ltd
Priority date: 2024-02-04
Filing date: 2024-02-04
Publication date: 2024-08-09
Anticipated expiration: 2034-02-04

Abstract

The utility model discloses an automobile double-loop electric control nitrogen shock absorber, which comprises a shock absorbing component, a double-valve controller and an oil cylinder, wherein the shock absorbing component comprises a working master cylinder, and the working master cylinder is provided with a piston rod; the double-valve controller comprises a connecting seat, a first loop structure and a second loop structure are arranged in the connecting seat, the first loop structure is provided with a first electric control valve, and the second loop structure is provided with a second electric control valve; one side of the connecting seat is provided with a main cylinder connecting part, the other side is provided with a secondary cylinder connecting part, the working main cylinder is assembled on the main cylinder connecting part, and the oil cylinder is assembled on the secondary cylinder connecting part; the inner cavity of the oil cylinder is divided into a floating oil cavity and a floating air cavity through a floating piston, and the floating oil cavity is communicated with the working master cylinder through a first loop structure and a second loop structure. The double-valve controller of the double loops is used for damping and adjusting the working master cylinder, so that the response speed of the shock absorber is improved, and the controllable range is enlarged.

Description

Double-loop electric control nitrogen shock absorber for automobile

Technical Field

The utility model relates to the technical field of automobile accessories, in particular to an automobile double-loop electric control nitrogen damper.

Background

The shock absorber is used for inhibiting the shock of the spring during rebound after shock absorption and the impact from the road surface. The damping device is widely used for automobiles, and is used for accelerating the damping of the vibration of the frames and the automobile bodies so as to improve the running smoothness of the automobiles. While the shock absorbing spring can filter the shock of road surface when passing over uneven road surface, the spring itself can reciprocate, and the shock absorber is used to restrain the spring from jumping. In the prior art, an electric control damping type shock absorber exists, and the oil flow in a piston cylinder is finely adjusted through a built-in electric control valve so as to change the jump performance of a shock absorbing spring of the shock absorber.

However, the existing electronically controlled damping shock absorbers still have the following disadvantages: single control loop, long response time, small controllable range, etc.

Disclosure of utility model

Aiming at the defects existing in the prior art, the utility model aims to provide the double-loop electric control nitrogen shock absorber for the automobile, which has adjustable multi-gear damping, improves the response speed of the shock absorber and increases the controllable range.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the automobile double-loop electric control nitrogen shock absorber comprises a shock absorbing component, a double-valve controller and an oil cylinder, wherein the shock absorbing component comprises a working master cylinder, and the working master cylinder is provided with a piston rod; the double-valve controller comprises a connecting seat, a first loop structure and a second loop structure are arranged in the connecting seat, the first loop structure is provided with a first electric control valve, and the second loop structure is provided with a second electric control valve; one side of the connecting seat is provided with a main cylinder connecting part, the other side is provided with a secondary cylinder connecting part, the working main cylinder is assembled on the main cylinder connecting part, and the oil cylinder is assembled on the secondary cylinder connecting part; the inner cavity of the oil cylinder is divided into a floating oil cavity and a floating air cavity through a floating piston, and the floating oil cavity is communicated with the working master cylinder through a first loop structure and a second loop structure.

In a further technical scheme, a first valve cavity and a second valve cavity are formed in the connecting seat, the first valve cavity and the second valve cavity are separated from each other, the first electric control valve is assembled in the first valve cavity, the second electric control valve is assembled in the second valve cavity, a main oil hole structure and an auxiliary oil hole structure are formed in the main cylinder connecting part, and the first valve cavity is communicated with a working main cylinder through the main oil hole structure; the second valve cavity is communicated with the working master cylinder through an auxiliary oil hole structure, the auxiliary cylinder connecting part is provided with parallel oil holes, the parallel oil holes are positioned at the separation positions of the first valve cavity and the second valve cavity, the parallel oil holes are communicated with the first valve cavity and the second valve cavity, and the floating oil cavity is communicated with the first valve cavity and the second valve cavity through the parallel oil holes.

In a further technical scheme, the flow passage area of the main oil hole structure is larger than that of the auxiliary oil hole structure, wherein the auxiliary oil hole structure is arranged at the side part of the main cylinder connecting part and consists of a plurality of round hole flow passages, and the round hole flow passages are distributed at intervals along the circumferential direction.

In a further technical scheme, the end part of the oil gas cylinder is provided with an axle connecting part; the side part of the oil cylinder is provided with an air inlet which is communicated with the floating air cavity.

In a further technical scheme, the working master cylinder comprises an inner cylinder body and an outer cylinder body, wherein the inner cylinder body and the outer cylinder body are respectively assembled at a master cylinder connecting part, the inner cylinder body and the outer cylinder body are concentrically arranged, the outer end parts of the inner cylinder body and the outer cylinder body are connected through an end cover, a guide hole is formed in the center of the end cover, and a piston rod is movably inserted into the guide hole; the inner end of the piston rod is provided with a main cylinder piston which is in sliding fit with the inner wall of the inner cylinder body, and the outer end of the piston rod is provided with a shock-absorbing connecting seat.

In a further technical scheme, the middle upper part of the outer cylinder body is slidably provided with a free connecting ring, and a shock-absorbing spring is arranged between the free connecting ring and the shock-absorbing connecting seat; the middle lower part of the outer wall of the outer cylinder is provided with an outer thread structure, the middle lower part of the outer cylinder is provided with an adjusting ring through the outer thread structure, and an adjusting spring is arranged between the adjusting ring and the free connecting ring.

In a further technical scheme, the first electric control valve and the second electric control valve respectively comprise electric control valve components with the same structure, each electric control valve component comprises a miniature linear motor, a valve core rod, a shutoff adjusting valve core, a shutoff damping plug and a shutoff damping sheet, the miniature linear motor is fixedly arranged on a connecting seat, the miniature linear motor is provided with an output shaft which is movably arranged in a straight line, and the output shaft is connected with the top of the valve core rod; the first valve cavity and the second valve cavity respectively comprise valve core assembly cavities with the same size and structure, the shutoff damping plug is fixedly arranged at the middle lower part of the valve core assembly cavities, the valve core assembly cavities are separated to form an upper valve cavity and a lower valve cavity, the upper valve cavity is communicated with the floating oil cavity, the lower valve cavity is communicated with the working master cylinder, and a valve core positioning hole is formed in the center position of the shutoff damping plug; the shutoff regulating valve core is fixedly assembled at the upper part of the valve core assembling cavity, a central connecting column is formed at the bottom of the shutoff regulating valve core, the central connecting column is inserted into a valve core positioning hole, a core bar assembling pore canal is formed in the shutoff regulating valve core, and a chamfer valve port is formed at the bottom of the core bar assembling pore canal; the side part of the interception regulating valve core is provided with at least one branch valve channel which respectively penetrates through the core bar assembly pore canal and the upper valve cavity; the valve core rod is movably arranged in the core rod assembly pore canal, the outer wall of the middle lower part of the valve core rod is provided with a cut-off groove, the cut-off groove extends along the axial direction of the cut-off groove, a damping flow channel is formed by surrounding the cut-off groove and the core rod assembly pore canal, the damping flow channel is respectively communicated with the upper valve cavity and the lower valve cavity, a damping core head is formed at the bottom of the valve core rod and matched with the chamfer valve port, and the damping core head is in airtight sealing fit with the chamfer valve port; the shutoff damping sheet is fixedly sleeved at the bottom of the valve core rod, and the shutoff damping sheet is far away from or close to the shutoff damping plug.

In a further technical scheme, the core rod assembly pore canal comprises a limiting valve canal and a shutoff valve canal, the inner diameter of the limiting valve canal is larger than that of the shutoff valve canal, a limiting shoulder is formed at the joint of the limiting valve canal and the shutoff valve canal, and the branch valve canal is arranged on the limiting shoulder; the top of the valve core rod is provided with a core rod connector in a protruding mode, the core rod connector is matched with the limiting valve channel, the core rod connector is slidably arranged in the limiting valve channel, and the core rod connector is connected with an output shaft of the miniature linear motor; the middle lower part of the valve core rod is provided with a cut-off part in a molding way, the cut-off part is arranged in a convex way and is matched with the cut-off valve channel, the cut-off part is movably inserted into the cut-off valve channel, and a cut-off groove is formed in the side wall of the cut-off part.

In a further technical scheme, the bottom of the core bar connector is provided with branch flow grooves, the number of the branch flow grooves is the same as that of the branch flow valve channels, and each branch flow groove is aligned with the corresponding branch flow valve channel respectively.

By adopting the structure, compared with the prior art, the utility model has the following advantages: the utility model provides an automobile double-loop electric control nitrogen shock absorber, which consists of a shock absorbing component, a double-valve controller and an oil cylinder which are sequentially connected, wherein double-control adjustment is carried out on internal oil liquid through an internal double-loop design, so that the response speed of the shock absorber is improved, and the controllable range is enlarged; the miniature linear motor controls the valve core rod to adjust the axial position, thereby realizing stepless adjustment of the cutoff amount and further improving the controllability of the shock absorber.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a cross-sectional view of the present utility model.

Fig. 3 is a schematic cut-away view of a dual valve controller of the present utility model.

Fig. 4 is a schematic diagram of another view of the dual valve controller of the present utility model.

Fig. 5 is a schematic view of the structure of the electrically controlled valve assembly of the present utility model.

Detailed Description

The following are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model.

The utility model aims to overcome the defects of single control loop, long response time and small controllable range of the electric control shock absorber in the prior art, and realizes double stepless variable control by electrically controlling the interception rate of the oil in the working master cylinder through the double valve controller 2, thereby improving the response speed of the shock absorber and increasing the controllable range.

The specific implementation scheme is that as shown in fig. 1 to 5, the automobile double-loop electric control nitrogen shock absorber comprises a shock absorbing component 1, a double-valve controller 2 and an oil cylinder 3 which are sequentially connected, wherein the shock absorbing component 1 comprises a working master cylinder, and the working master cylinder is provided with a piston rod 11; the double-valve controller 2 comprises a connecting seat, wherein a first loop structure and a second loop structure are arranged in the connecting seat, the first loop structure is provided with a first electric control valve 21, and the second loop structure is provided with a second electric control valve 22; one side of the connecting seat is provided with a main cylinder connecting part, the other side is provided with an auxiliary cylinder connecting part, the working main cylinder is assembled on the main cylinder connecting part, and the oil cylinder 3 is assembled on the auxiliary cylinder connecting part; the inner cavity of the oil cylinder 3 is divided into a floating oil cavity 301 and a floating air cavity 302 through a floating piston 303, and the floating oil cavity 301 is communicated with the working master cylinder through a first loop structure and a second loop structure; the end part of the oil cylinder 3 is provided with an axle connecting part 32; the side part of the oil cylinder 3 is provided with an air inlet 31, the air inlet 31 is communicated with a floating air cavity 302, the fixed compression ratio of hydraulic oil in the shock absorber is realized, and the air inlet 31 of the oil cylinder 3 is externally connected with an air charging device to supplement or decompress helium gas in the floating air cavity 302, so that the fixed compression ratio is adjusted.

The control circuit is used for respectively carrying out loop flow regulation on the first electric control valve 21 and the second electric control valve 22 of the double-valve controller 2, hydraulic oil in the shock absorber has a fixed compression ratio, the internal compression ratio of the working master cylinder is regulated through the floating oil-gas inner cylinder in the oil cylinder 3, the flow of the first loop structure and the second loop structure is controlled, so that the outflow and the reflux rate of the hydraulic oil are controlled, the regulation of the internal compression ratio of the working master cylinder is realized, the larger the internal flow of the double-valve controller 2 is, the larger the rebound amplitude of the working master cylinder is, and the softer the shock absorber is, therefore, the double-loop electric control shock absorber is required to be adaptive to a control circuit of an automobile, and the self-adaptive regulation is carried out on the shock absorber through the sensing element in the control circuit.

The connecting seat 2 in the embodiment, as an intermediate connecting component of the shock absorber, has the functions of forming an integral rigid structure and forming an oil path of internal hydraulic oil, specifically, a first valve cavity 210 and a second valve cavity 220 are formed in the connecting seat 2, the first valve cavity 210 and the second valve cavity 220 are separated from each other, a first electric control valve 21 is assembled in the first valve cavity 210, a second electric control valve 22 is assembled in the second valve cavity 220, a main cylinder connecting part is provided with a main oil hole structure 2100 and an auxiliary oil hole structure 2200, and the first valve cavity 210 is communicated with a working main cylinder through the main oil hole structure 2100; the second valve cavity 220 is communicated with the working master cylinder through the auxiliary oil hole structure 2200, the auxiliary cylinder connecting part is provided with a parallel oil hole 300, the parallel oil hole 300 is positioned at a separation position of the first valve cavity 210 and the second valve cavity 220, the parallel oil hole 300 is communicated with the first valve cavity 210 and the second valve cavity 220, and the floating oil cavity 301 is communicated with the first valve cavity 210 and the second valve cavity 220 through the parallel oil hole 300.

The flow passage area of the main oil hole structure 2100 is larger than that of the auxiliary oil hole structure 2200, wherein the auxiliary oil hole structure 2200 is arranged at the side part of the main cylinder connecting part, the auxiliary oil hole structure 2200 consists of a plurality of round hole flow passages, and the round hole flow passages are distributed at intervals along the circumferential direction.

The main damping component of the double-loop electric control damper provided by the utility model is a shock absorption component 1, the shock absorption component 1 has the specific structure that the shock absorption component 1 comprises an inner cylinder 17 and an outer cylinder 13, a piston oil cavity 170 is arranged in the inner cylinder 17, the piston oil cavity 170 is respectively communicated with a first loop structure and a second loop structure, and the interior is filled with hydraulic oil; the inner cylinder 17 and the outer cylinder 13 are respectively assembled at the main cylinder connecting part, the inner cylinder 17 and the outer cylinder 13 are concentrically arranged, the outer ends of the inner cylinder 17 and the outer cylinder 13 are connected through an end cover 112, a guide hole is arranged at the center of the end cover 112, and the piston rod 11 is movably inserted into the guide hole; the inner end of the piston rod 11 is equipped with a master cylinder piston 111, the master cylinder piston 111 is slidably fitted with the inner wall of the piston oil chamber 170, and the outer end of the piston rod 11 is equipped with a shock absorbing connection seat 113.

The middle upper part of the outer cylinder 13 is slidably provided with a free connecting ring 14, and a shock-absorbing spring 12 is arranged between the free connecting ring 14 and a shock-absorbing connecting seat 113; the outer screw structure 131 is formed at the middle lower part of the outer wall of the outer cylinder 13, the adjusting ring 16 is assembled at the middle lower part of the outer cylinder 13 through the outer screw structure 131, and the adjusting spring 15 is assembled between the adjusting ring 16 and the free connecting ring 14. Vibration energy received by the shock absorber is buffered and absorbed through the shock absorbing spring 12, and the compression tightness of the shock absorbing spring 12 is externally adjusted through the adjusting ring 16 so as to adjust the softness of the shock absorber.

The embodiment provides a structure of a specific electric control valve assembly, specifically, a first electric control valve 21 and a second electric control valve 22 respectively comprise electric control valve assemblies with the same structure, each electric control valve assembly comprises a miniature linear motor 201, a valve core rod 202, a shutoff adjusting valve core 203, a shutoff damping plug 204 and a shutoff damping sheet 205, the miniature linear motor 201 is fixedly arranged on a connecting seat, the miniature linear motor 201 is provided with an output shaft which is movably arranged in a straight line, and the output shaft is connected with the top of the valve core rod 202; the first valve cavity 210 and the second valve cavity 220 respectively comprise valve core assembly cavities with the same size and structure, the interception damping plug 204 is fixedly arranged at the middle lower part of the valve core assembly cavities, the valve core assembly cavities are separated to form an upper valve cavity and a lower valve cavity, the upper valve cavity is communicated with the floating oil cavity 301, the lower valve cavity is communicated with the working master cylinder, and a valve core positioning hole is formed in the center position of the interception damping plug 204; the shutoff adjusting valve core 203 is fixedly assembled at the upper part of the valve core assembling cavity, a central connecting column is formed at the bottom of the shutoff adjusting valve core 203 and is inserted into a valve core positioning hole, a core rod assembling pore canal is formed in the shutoff adjusting valve core 203, and a chamfer valve port 2030 is formed at the bottom of the core rod assembling pore canal; a branch valve channel 2031 is formed on the side part of the interception regulating valve core 203, and the branch valve channel 2031 penetrates through the core bar assembly pore canal and the upper valve cavity respectively; the valve core rod 202 is movably arranged in the core rod assembly duct, a shutoff groove 2024 is formed in the outer wall of the middle lower part of the valve core rod 202, the shutoff groove 2024 extends along the axis direction of the valve core rod 202, a damping flow passage is formed between the shutoff groove 2024 and the core rod assembly duct in a surrounding mode, the damping flow passage is respectively communicated with an upper valve cavity and a lower valve cavity, a damping core head 2023 is formed at the bottom of the valve core rod 202, the damping core head 2023 is matched with the chamfer valve port 2030, and the damping core head 2023 is in airtight sealing fit with the chamfer valve port 2030; the interception damping fin 205 is fixedly sleeved at the bottom of the valve core rod 202, and the interception damping fin 205 is far away from or close to the interception damping plug 204.

The core bar assembly pore canal comprises a limiting valve canal and a shutoff valve canal, the inner diameter of the limiting valve canal is larger than that of the shutoff valve canal, a limiting shoulder is formed at the joint of the limiting valve canal and the shutoff valve canal, and a branch valve canal 2031 is arranged on the limiting shoulder; the top of the valve core rod 202 is molded with a core rod connector 2021, the core rod connector 2021 is arranged in a convex manner, the core rod connector 2021 is matched with a limiting valve channel, the core rod connector 2021 is slidably arranged in the limiting valve channel, and the core rod connector 2021 is connected with an output shaft of the miniature linear motor 201; the lower middle part of the valve core rod 202 is provided with a shutoff part 2022, the shutoff part 2022 is arranged in a convex manner, the shutoff part 2022 is matched with a shutoff valve channel, the shutoff part 2022 is movably inserted into the shutoff valve channel, and a shutoff groove 2024 is formed in the side wall of the shutoff part 2022.

A tributary groove 2025 is formed in the bottom of the core bar connector 2021, the number of tributary grooves 2025 is the same as that of the tributary valve channels 2031, and each tributary groove 2025 is aligned with a corresponding tributary valve channel 2031, respectively.

The displacement of the output shaft of the miniature linear motor 201 is controlled by the control circuit, so that the valve core rod 202 is driven to axially displace, the flow of the damping flow channel is regulated, stepless variable regulation of the flow of the first loop structure and the second loop structure is realized, the structure is simple, the accuracy is high, the valve core rod 202 is controlled by the miniature linear motor 201 to axially regulate the position, stepless regulation of the cut-off flow is realized, and the controllability of the shock absorber is further improved.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims

1. Automatically controlled nitrogen gas bumper shock absorber of car double circuit, its characterized in that: comprises a shock absorbing component (1), a double-valve controller (2) and an oil-gas cylinder (3) which are connected in sequence,

The shock absorbing assembly (1) comprises a working master cylinder which is provided with a piston rod (11);

The double-valve controller (2) comprises a connecting seat, a first loop structure and a second loop structure are arranged in the connecting seat, the first loop structure is provided with a first electric control valve (21), and the second loop structure is provided with a second electric control valve (22); one side of the connecting seat is provided with a main cylinder connecting part, the other side is provided with an auxiliary cylinder connecting part, the working main cylinder is assembled on the main cylinder connecting part, and the oil cylinder (3) is assembled on the auxiliary cylinder connecting part;

the inner cavity of the oil cylinder (3) is divided into a floating oil cavity (301) and a floating air cavity (302) through a floating piston (303), and the floating oil cavity (301) is communicated with the working master cylinder through a first loop structure and a second loop structure.

2. The automotive dual circuit electrically controlled nitrogen damper of claim 1, wherein: a first valve cavity (210) and a second valve cavity (220) are arranged in the connecting seat, the first valve cavity (210) and the second valve cavity (220) are separated from each other, the first electric control valve (21) is assembled in the first valve cavity (210), the second electric control valve (22) is assembled in the second valve cavity (220),

The main cylinder connecting part is provided with a main oil hole structure (2100) and an auxiliary oil hole structure (2200), and the first valve cavity (210) is communicated with the working main cylinder through the main oil hole structure (2100); the second valve cavity (220) is communicated with the working master cylinder through the auxiliary oil hole structure (2200),

The auxiliary cylinder connecting part is provided with a parallel oil hole (300), the parallel oil hole (300) is positioned at a separation position of the first valve cavity (210) and the second valve cavity (220), the parallel oil hole (300) is communicated with the first valve cavity (210) and the second valve cavity (220), and the floating oil cavity (301) is communicated with the first valve cavity (210) and the second valve cavity (220) through the parallel oil hole (300).

3. The automotive dual circuit electrically controlled nitrogen damper of claim 2, wherein: the flow passage area of the main oil hole structure (2100) is larger than that of the auxiliary oil hole structure (2200), wherein the auxiliary oil hole structure (2200) is arranged at the side part of the main cylinder connecting part, the auxiliary oil hole structure (2200) is composed of a plurality of round hole flow passages, and the round hole flow passages are distributed at intervals along the circumferential direction.

4. The automotive dual circuit electrically controlled nitrogen damper of claim 3, wherein: an axle connecting part (32) is arranged at the end part of the oil cylinder (3); an air inlet (31) is arranged at the side part of the oil cylinder (3), and the air inlet (31) is communicated with the floating air cavity (302).

5. The automotive dual circuit electrically controlled nitrogen damper of claim 1, wherein: the working master cylinder comprises an inner cylinder body (17) and an outer cylinder body (13), the inner cylinder body (17) and the outer cylinder body (13) are respectively assembled at the connecting part of the master cylinder, the inner cylinder body (17) and the outer cylinder body (13) are concentrically arranged, the outer end parts of the inner cylinder body (17) and the outer cylinder body are connected through an end cover (112), a guide hole is formed in the center of the end cover (112), and the piston rod (11) is movably inserted into the guide hole; the inner end part of the piston rod (11) is provided with a main cylinder piston (111), the main cylinder piston (111) is in sliding fit with the inner wall of the inner cylinder body (17), and the outer end part of the piston rod (11) is provided with a shock-absorbing connecting seat (113).

6. The automotive dual-circuit electronically controlled nitrogen shock absorber of claim 5, wherein: a free connecting ring (14) is slidably arranged at the middle upper part of the outer cylinder body (13), and a shock-absorbing spring (12) is arranged between the free connecting ring (14) and the shock-absorbing connecting seat (113); the middle lower part of the outer wall of the outer cylinder body (13) is provided with an external thread structure (131), the middle lower part of the outer cylinder body (13) is provided with an adjusting ring (16) through the external thread structure (131), and an adjusting spring (15) is arranged between the adjusting ring (16) and the free connecting ring (14).

7. The automotive dual circuit electrically controlled nitrogen damper of claim 2, wherein: the first electric control valve (21) and the second electric control valve (22) respectively comprise electric control valve components with the same structure, the electric control valve components comprise a miniature linear motor (201), a valve core rod (202), a interception regulating valve core (203), an interception damping plug (204) and an interception damping sheet (205),

The miniature linear motor (201) is fixedly arranged on the connecting seat, the miniature linear motor (201) is provided with an output shaft which is movably arranged in a straight line, and the output shaft is connected with the top of the valve core rod (202);

The first valve cavity (210) and the second valve cavity (220) respectively comprise valve core assembly cavities with the same size and structure, the interception damping plug (204) is fixedly arranged at the middle lower part of the valve core assembly cavities, the valve core assembly cavities are separated to form an upper valve cavity and a lower valve cavity, the upper valve cavity is communicated with the floating oil cavity (301), the lower valve cavity is communicated with the working master cylinder, and a valve core positioning hole is formed in the central position of the interception damping plug (204);

The shutoff adjusting valve core (203) is fixedly assembled at the upper part of the valve core assembling cavity, a central connecting column is formed at the bottom of the shutoff adjusting valve core (203), the central connecting column is inserted into a valve core positioning hole, a core rod assembling pore canal is formed in the shutoff adjusting valve core (203), and a chamfer valve port (2030) is formed at the bottom of the core rod assembling pore canal; at least one branch valve channel (2031) is arranged on the side part of the interception regulating valve core (203), and the branch valve channel (2031) respectively penetrates through the core bar assembly pore canal and the upper valve cavity;

The valve core rod (202) is movably arranged in the core rod assembly duct, a shutoff groove (2024) is formed in the outer wall of the middle lower part of the valve core rod (202), the shutoff groove (2024) extends along the axis direction of the shutoff groove, a damping flow passage is formed by surrounding the shutoff groove (2024) and the core rod assembly duct, the damping flow passage is respectively communicated with an upper valve cavity and a lower valve cavity, a damping core head (2023) is formed at the bottom of the valve core rod (202), the damping core head (2023) is matched with the chamfer valve port (2030), and the damping core head (2023) is in airtight sealing fit with the chamfer valve port (2030);

The interception damping piece (205) is fixedly sleeved at the bottom of the valve core rod (202), and the interception damping piece (205) is far away from or close to the interception damping plug (204).

8. The automotive dual circuit electrically controlled nitrogen damper of claim 7, wherein: the core bar assembly pore canal comprises a limiting valve canal and a shutoff valve canal, the inner diameter of the limiting valve canal is larger than that of the shutoff valve canal, a limiting shoulder is formed at the joint of the limiting valve canal and the shutoff valve canal, and the tributary valve canal (2031) is arranged on the limiting shoulder;

A core bar connector (2021) is formed at the top of the valve core rod (202), the core bar connector (2021) is arranged in a protruding mode, the core bar connector (2021) is matched with the limiting valve channel, the core bar connector (2021) is slidably arranged in the limiting valve channel, and the core bar connector (2021) is connected with an output shaft of the miniature linear motor (201); the middle lower part of the valve core rod (202) is provided with a cut-off part (2022) in a molding mode, the cut-off part (2022) is arranged in a protruding mode, the cut-off part (2022) is matched with the cut-off valve channel, the cut-off part (2022) is movably inserted into the cut-off valve channel, and the cut-off groove (2024) is formed in the side wall of the cut-off part (2022).

9. The automotive dual circuit electrically controlled nitrogen damper of claim 8, wherein: a tributary groove (2025) is formed in the bottom of the core bar connector (2021), the number of the tributary grooves (2025) is the same as that of the tributary valve channels (2031), and each tributary groove (2025) is aligned with a corresponding tributary valve channel (2031) respectively.