External solenoid valve and electronically controlled shock absorber having the same

Abstract

The utility model provides an external solenoid valve and an electrically controlled shock absorber having the same, the external solenoid valve comprising a valve seat, a liquid flow control valve core assembly, a magnetic shell and a drive assembly; the liquid flow control valve core assembly comprising a main valve body, an inlet valve body and a floating valve body, a first liquid flow cavity is formed between the left end of the floating valve body and the right end of the inlet valve body, a plurality of inlet holes for communicating with the first liquid flow cavity are circumferentially arranged on the inlet valve body; the liquid flow control valve core assembly also comprises a valve plate group, the valve plate group is coaxially fixed on the inner side of the inlet valve body, the outer edge of the valve plate group abuts against the inlet valve body located outside the inlet hole to cut off the passage between the inlet hole and the first liquid flow cavity; the electrically controlled shock absorber comprises the above-mentioned external solenoid valve; after the utility model is applied to the electrically controlled shock absorber, the electrically controlled shock absorber can apply a linear damping force to the shock absorbing system of the vehicle, that is, it can improve the comfort when driving the car.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves for automobile electronically controlled shock absorbers, in particular to an external electromagnetic valve and an electronically controlled shock absorber having the same. Background Art

[0002] The external solenoid valve of the electronically controlled shock absorber is an important component of the electronically controlled shock absorber for vehicles. The external solenoid valve of the electronically controlled shock absorber is used to control the flow rate of the oil in the electronically controlled shock absorber for vehicles to change the damping force of the electronically controlled shock absorber for vehicles, thereby improving the comfort of driving a car. For this reason, Chinese patent announcement number: CN118149142A discloses a solenoid valve and a shock absorber. However, in the structure of the solenoid valve, the valve plate used to close the liquid inlet on the overflow valve seat is pressed against the overflow valve seat by a spring. When the oil flows from the liquid inlet, the valve plate is pressed against the overflow valve seat by a spring. When entering, the valve plate will overcome the thrust of the spring and move to the right to release the valve plate from the closed state on the liquid inlet only when the pressure exerted by the oil on the valve plate is greater than the thrust exerted by the spring on the valve plate. That is, the opening of the valve plate is sudden, that is, the valve plate cannot be opened in a linear manner, which will cause the flow rate of oil flowing through the liquid inlet to not change linearly. After the solenoid valve is applied to the electronically controlled shock absorber, the electronically controlled shock absorber will not be able to exert a linear damping force on the vehicle's shock absorbing system, which will affect the comfort of driving the car. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an external solenoid valve and an electronically controlled shock absorber having the same, which, after being applied to the electronically controlled shock absorber, can enable the electronically controlled shock absorber to apply a linear damping force to the shock absorbing system of the vehicle, that is, can improve the comfort of driving a car.

[0004] The utility model provides an external solenoid valve, comprising a valve seat, a liquid flow control valve core assembly, a magnetic shell and a drive assembly; the liquid flow control valve core assembly and the magnetic shell are sequentially arranged on the inner side of the valve seat from left to right, the magnetic shell is fixed to the valve seat, and the drive assembly is connected to the right ends of the valve seat and the magnetic shell; the liquid flow control valve core assembly comprises a main valve body, an inflow valve body and a floating valve body, the right end of the main valve body abuts against the left end of the magnetic shell, an annular liquid flow channel is formed between the main valve body, the magnetic shell and the valve seat, the inflow valve body and the floating valve body are sequentially arranged in the main valve body from left to right, the inflow valve body is fixed to the main valve body, the floating valve body can be movably connected to the main valve body left and right, a first liquid flow cavity is formed between the left end of the floating valve body and the right end of the inflow valve body, and the floating valve A second liquid flow chamber is formed between the right end of the body and the right end of the main valve body, a plurality of inlet holes for communicating with the first liquid flow chamber are circumferentially arranged on the inlet valve body, a plurality of flow holes for communicating with the first liquid flow chamber and the second liquid flow chamber are arranged on the floating valve body, an outlet hole for communicating with the second liquid flow chamber and the annular liquid flow channel is also arranged on the floating valve body, a plurality of leakage holes for communicating with the first liquid flow chamber and the annular liquid flow channel are arranged on the side wall of the main valve body; the liquid flow control valve core assembly also includes a valve plate group, the valve plate group is coaxially fixed on the inner side of the inlet valve body, and the outer edge of the valve plate group abuts against the inlet valve body located outside the inlet hole to cut off the passage between the inlet hole and the first liquid flow chamber.

[0005] After the utility model adopts the above structure, since the valve plate group is coaxially fixed on the inner side of the inlet valve body, and the outer edge of the valve plate group abuts against the inlet valve body located outside the inlet hole to block the passage between the inlet hole and the first liquid flow chamber, when the oil enters from the inlet hole and applies pressure to the valve plate group, the outer edge of the valve plate group can produce linear deformation toward the side away from the inlet valve body, that is, a passage for the oil to flow through can be generated between the outer edge of the valve plate group and the inlet valve body, and when the pressure of the oil changes, the deformation amount of the outer edge of the valve plate group can also change linearly, so that the flow rate of the oil flowing through the inlet hole can also change linearly, and then after the solenoid valve is applied to the electronically controlled shock absorber, the electronically controlled shock absorber can apply a linear damping force to the shock absorbing system of the vehicle, that is, the comfort of driving the car can be improved.

[0006] In a possible implementation manner, a first annular flange is provided on the inner side of the inlet valve body, and the first flange abuts against the outer edge of the valve plate assembly.

[0007] In a possible implementation manner, a second annular flange is further provided on the inner side of the inlet valve body, and the second flange abuts against the outer edge of the left end of the floating valve body.

[0008] In a possible implementation manner, the middle portion of the valve plate group and the middle portion of the inlet valve body are axially fixed via a fastening assembly, and the fastening assembly is axially disposed in the valve plate group and the inlet valve body.

[0009] In a possible embodiment, the drive assembly includes a movable armature push rod assembly and an electromagnetic drive assembly; a concave cavity is provided at the right end of the magnetic shell, and a magnetic shell inner column is provided in the middle of the inner end of the concave cavity, and the magnetic shell inner column extends from left to right along the axial direction of the magnetic shell, and the inner side of the magnetic shell inner column forms a accommodating cavity with an opening at the left end, and the movable armature push rod assembly is installed in the accommodating cavity, and a control head is fixed at the left end of the movable armature push rod assembly, and the electromagnetic drive assembly is connected to the right end of the valve seat and is used to apply an electromagnetic force to the movable armature push rod assembly to drive the movable armature push rod assembly to move to the left; the left end of the control head abuts against the outlet end of the outlet hole and is used to block the outlet hole; the electromagnetic drive assembly includes an outer shell, a rear magnetic Plate and winding bracket; the left part of the shell is provided with an installation cavity with an opening at the left end, the rear magnetic conductive plate is fixed on the inner end part of the installation cavity, the winding bracket is arranged inside the installation cavity and the right end of the winding bracket is fixed to the left end of the rear magnetic conductive plate, the winding bracket and the rear magnetic conductive plate are coaxially arranged with the installation cavity, a coil is wound on the winding bracket, the right part of the shell is provided with a wiring terminal, the lead wire of the coil passes through the wire hole on the rear magnetic conductive plate and is electrically connected to the conductive pin in the wiring terminal; the shell is fixed to the right part of the valve seat, the right end of the magnetic shell abuts against the rear magnetic conductive plate, the winding bracket is inserted into the gap between the outer wall of the inner column of the magnetic shell and the inner wall of the magnetic shell, and the right end of the inner column of the magnetic shell abuts against the rear magnetic conductive plate.

[0010] In a possible implementation manner, an embedding groove is provided on the inner end of the installation cavity, and the rear magnetic conductive plate is embedded in the embedding groove and tightly matched with the embedding groove.

[0011] In a possible embodiment, a protrusion with an outer diameter smaller than that of the inner column of the magnetic shell is coaxially arranged at the right end of the inner column of the magnetic shell, and an annular step is formed at the connection between the protrusion and the right end of the inner column of the magnetic shell. The protrusion is inserted into the inner hole of the rear magnetic conductive plate, and the annular step abuts against the left end of the rear magnetic conductive plate.

[0012] In a possible implementation manner, the left end of the shell is sleeved on the outside of the right end of the valve seat and is tightly matched with the valve seat.

[0013] In a possible implementation, an annular groove is provided on the outer peripheral wall of the valve seat, a sealing ring is embedded in the annular groove, and the sealing ring is tightly matched with the inner wall of the annular groove and the inner wall of the shell.

[0014] An electronically controlled shock absorber, the above-mentioned external solenoid valve, the left end of the inlet valve body is welded and fixed to the outer wall of the intermediate cylinder in the electronically controlled shock absorber, and the inlet end of the inlet hole is connected to the inner cavity of the intermediate cylinder, the left end of the valve seat is welded and fixed to the outer wall of the outer cylinder in the electronically controlled shock absorber, and the outlet end of the annular liquid flow channel is connected to the inner cavity of the outer cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1is a schematic diagram of the cross-sectional structure of an electronically controlled shock absorber;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure after the housing, rear magnetic conductive plate, winding bracket and coil are assembled. DETAILED DESCRIPTION

[0017] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0018] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0019] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] See also Figure 1-2As shown, the embodiment of the present application discloses an external solenoid valve, including a valve seat 1, a liquid flow control valve core assembly 2, a magnetic shell 3 and a drive assembly; the liquid flow control valve core assembly 2 and the magnetic shell 3 are arranged on the inner side of the valve seat 1 from left to right, the magnetic shell 3 is fixed to the valve seat 1, and the drive assembly is connected to the right end of the valve seat 1 and the magnetic shell 3; the liquid flow control valve core assembly 2 includes a main valve body 21, an inlet valve body 22 and a floating valve body 23, and the main valve body 21 has a The right end of the main valve body 21 is in contact with the left end of the magnetic shell 3, and an annular liquid flow channel 6 is formed between the main valve body 21, the magnetic shell 3 and the valve seat 1. The inlet valve body 22 and the floating valve body 23 are arranged in the main valve body 21 from left to right. The inlet valve body 22 is fixed to the main valve body 21, and the floating valve body 23 is connected to the main valve body 21 so as to be movable left and right. A first liquid flow chamber 24 is formed between the left end of the floating valve body 23 and the right end of the inlet valve body 22. A second liquid flow chamber 25 is formed between the right end and the right end of the main valve body 21. A plurality of inlet holes 221 for communicating with the first liquid flow chamber 24 are circumferentially arranged on the inlet valve body 22. A plurality of flow holes 231 for communicating with the first liquid flow chamber 24 and the second liquid flow chamber 25 are arranged on the floating valve body 23. An outlet hole 232 for communicating with the second liquid flow chamber 25 and the annular liquid flow channel 6 is also arranged on the floating valve body 23. A plurality of leakage holes 211 for communicating with the first liquid flow chamber 24 and the annular liquid flow channel 6 are arranged on the side wall of the main valve body 21. The liquid flow control valve core assembly 2 also includes a valve plate group 26, which is coaxially fixed on the inner side of the inlet valve body 22. The outer edge of the valve plate group 26 abuts against the inlet valve body 22 located outside the inlet hole 221 to block the passage between the inlet hole 221 and the first liquid flow chamber 24.

[0022] A first annular flange 222 is provided on the inner side of the inlet valve body 22, and the first flange 222 abuts against the outer edge of the valve plate group 26; through the provision of the first annular flange, the first flange can reliably abut against the outer edge of the valve plate group and support the valve plate group, and after the outer edge of the valve plate group abuts against the first annular flange, the valve plate group and the first flange can achieve the purpose of planar sealing, so that the valve plate group can reliably isolate the passage between the inlet hole and the first liquid flow chamber.

[0023] A second annular flange 223 is also provided on the inner side of the inlet valve body 22, and the second flange 223 abuts against the outer edge of the left end of the floating valve body 23. By adopting this structure, after the driving assembly pushes the floating valve body to move the floating valve body to the left, the left end of the floating valve body can reliably abut against the second flange, and the left end of the floating valve body and the second flange can reliably achieve the purpose of planar sealing.

[0024] The middle part of the valve plate group 26 and the middle part of the inlet valve body 22 are axially fixed by a fastening assembly 27, and the fastening assembly 27 is axially penetrated into the valve plate group 26 and the inlet valve body 22; by adopting this structure, the fastening assembly can reliably realize the axial fixation of the middle part of the valve plate group and the middle part of the inlet valve body, and the fastening assembly can be a fastening assembly composed of a rivet column or a bolt assembly.

[0025] The drive assembly includes a movable armature push rod assembly 4 and an electromagnetic drive assembly 5; a concave cavity 31 is provided at the right end of the magnetic shell 3, and a magnetic shell inner column 32 is provided in the middle of the inner end of the concave cavity 31. The magnetic shell inner column 32 extends from left to right along the axial direction of the magnetic shell 3, and the inner side of the magnetic shell inner column 32 forms an accommodating cavity 33 with an opening at the left end. The movable armature push rod assembly 4 is installed in the accommodating cavity 33, and a control head 41 is fixed to the left end of the movable armature push rod assembly 4. The electromagnetic drive assembly 5 is connected to the right end of the valve seat 1. The electromagnetic force applied to the movable armature push rod assembly 4 to drive the movable armature push rod assembly 4 to move leftward is applied to the movable armature push rod assembly 4; the left end of the control head 41 abuts against the outlet end of the outflow hole 232 and is used to block the outflow hole 232; the electromagnetic drive assembly 5 includes a shell 51, a rear magnetic conductive plate 52 and a winding bracket 53; the left part of the shell 51 is provided with a mounting cavity 511 with a left end opening, the rear magnetic conductive plate 52 is fixed on the inner end of the mounting cavity 511, and the winding bracket 53 is arranged inside the mounting cavity 51 ... on the left part of the shell 511 and the winding bracket 53 is arranged on the left part of the shell 511 and the winding bracket 53 is arranged on the left part of the shell 511 and the winding bracket 53 is arranged inside the mounting cavity 511 and the winding bracket 53 is arranged inside the mounting cavity 511 and the winding bracket 53 is arranged inside the mounting cavity 511 and the winding bracket 53 is arranged inside the mounting cavity 511 and the winding bracket 53 is arranged inside the mounting cavity 511 and the winding The right end of the bracket 53 is fixed to the left end of the rear magnetic conductive plate 52. The winding bracket 53 and the rear magnetic conductive plate 52 are coaxially arranged with the mounting cavity 511. A coil 54 is wound on the winding bracket 53. A wiring terminal 512 is arranged on the right part of the housing 51. The lead wire of the coil 54 passes through the wire hole on the rear magnetic conductive plate 52 and is electrically connected to the conductive pin in the wiring terminal 512. The housing 51 is fixed to the right part of the valve seat 1. The right end of the magnetic conductive shell 3 abuts against the rear magnetic conductive plate 52. The winding bracket 53 is inserted in In the gap between the outer wall of the inner column 32 of the magnetic shell and the inner wall of the magnetic shell 3, the right end of the inner column 32 of the magnetic shell abuts against the rear magnetic plate 52; after the external solenoid valve adopts the above-mentioned electromagnetic drive assembly, since the outer shell, rear magnetic plate, winding bracket and coil in the electromagnetic drive assembly are pre-assembled into one body, it can facilitate the assembly of the electromagnetic drive assembly with the valve seat and the magnetic shell, and can make the structure of the external solenoid valve more compact, easier to assemble, and have excellent installation performance.

[0026] An embedding groove 513 is provided on the inner end of the mounting cavity 511, and the rear magnetic conductive plate 52 is embedded in the embedding groove 513 and tightly matched with the embedding groove 513; after adopting this structure, under the action of the embedding groove, the rear magnetic conductive plate can be embedded in the embedding groove and tightly matched with the embedding groove, so that the rear magnetic conductive plate and the outer shell can be easily fixed, and the coaxiality of the rear magnetic conductive plate and the mounting cavity can be ensured.

[0027] The right end of the inner column 32 of the magnetic shell is coaxially provided with a protrusion 321 whose outer diameter is smaller than that of the inner column 32 of the magnetic shell. The connection between the protrusion 321 and the right end of the inner column 32 of the magnetic shell forms an annular step 322. The protrusion 321 is inserted into the inner hole of the rear magnetic plate 52, and the annular step 322 abuts against the left end of the rear magnetic plate 52. By adopting this structure, the right end of the inner column of the magnetic shell can be reliably abutted against the middle part of the rear magnetic plate, and because the protrusion is inserted into the inner hole of the rear magnetic plate, the rear magnetic plate and the inner column of the magnetic shell can have excellent magnetic conductivity.

[0028] The left end of the shell 51 is sleeved on the outside of the right end of the valve seat 1 and tightly fits with the valve seat 1; by adopting this structure, the shell can be reliably and conveniently fixed to the right end of the valve seat, that is, it has the advantage of easy assembly of the shell and the valve seat.

[0029] An annular groove 11 is provided on the outer peripheral wall of the valve seat 1, and a sealing ring 7 is embedded in the annular groove 11. The sealing ring 7 is tightly fitted with the inner wall of the annular groove 11 and the inner wall of the outer shell 51. By adopting this structure, under the action of the sealing ring, the outer shell and the valve seat can be more reliably tightly fitted together, that is, the assembly firmness of the outer shell and the valve seat can be further improved, and the sealing ring can prevent dust and impurities from entering the installation cavity of the outer shell through the gap between the outer shell and the valve seat.

[0030] An electronically controlled shock absorber comprises the above-mentioned external solenoid valve, wherein the left end of the inlet valve body 22 is welded and fixed to the outer wall of the intermediate tube 8 in the electronically controlled shock absorber and the inlet end of the inlet hole 221 is connected to the inner cavity of the intermediate tube 8, the left end of the valve seat 1 is welded and fixed to the outer wall of the outer cylinder 9 in the electronically controlled shock absorber and the outlet end of the annular liquid flow channel 6 is connected to the inner cavity of the outer cylinder 9.

[0031] When the utility model is working, in the initial state, the electromagnetic force applied by the coil to the movable armature push rod assembly to drive the movable armature push rod assembly to move leftward is small, that is, the thrust applied by the control head to the floating valve body is small, and the left end of the floating valve body is in a state of abutting and sealing with the right end of the inlet valve body. When the oil from the intermediate cylinder of the electronically controlled shock absorber enters the inlet hole, the outer edge of the valve plate group can produce linear deformation toward the side away from the inlet valve body. At this time, the oil can enter the first liquid flow chamber through the gap between the valve plate group and the inlet valve body. The oil entering the first liquid flow chamber can flow through the flow hole, the second liquid flow chamber, the outlet hole and the annular liquid flow channel in sequence and then enter the outer cylinder of the electronically controlled shock absorber (at this time, the control head can be pushed open by the oil flowing through the outlet hole). When the flow rate of the oil entering the inlet hole increases, the outer edge of the valve plate group can further produce linear deformation toward the side away from the inlet valve body, that is, enter the first liquid flow chamber The flow rate of the oil in the valve increases, and the flow hole is not enough for the large flow of oil to pass through. At this time, the floating valve body will move toward the side away from the inlet valve body, and when the floating valve body is against the control head, the floating valve body will overcome the thrust of the control head and continue to move toward the side away from the inlet valve body, that is, a gap can be generated between the left end of the floating valve body and the right end of the inlet valve body. At this time, the oil entering the first liquid flow chamber can flow through the gap between the left end of the floating valve body and the right end of the inlet valve body, the leakage hole and the annular liquid flow channel in sequence and then enter the outer cylinder of the electronically controlled shock absorber; in addition, by controlling the current flowing through the coil, the electromagnetic force applied by the electromagnetic drive assembly to the movable armature push rod assembly to drive the movable armature push rod assembly to move to the left can be controlled, thereby controlling the flow rate of the oil flowing through the external solenoid valve, and then controlling the damping force applied by the electronically controlled shock absorber to the shock absorbing system to achieve soft and hard adjustment of the automobile suspension.

[0032] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An external solenoid valve, comprising a valve seat (1), a liquid flow control valve core assembly (2), a magnetic shell (3) and a drive assembly; the liquid flow control valve core assembly (2) and the magnetic shell (3) are arranged on the inner side of the valve seat (1) from left to right, the magnetic shell (3) is fixed to the valve seat (1), and the drive assembly is connected to the right end of the valve seat (1) and the magnetic shell (3); the liquid flow control valve core assembly (2) comprises a main valve body (21), an inlet valve body The main valve body (21) is provided with a main valve member (22) and a floating valve body (23), the right end of the main valve body (21) is in contact with the left end of the magnetic shell (3), an annular liquid flow channel (6) is formed between the main valve body (21), the magnetic shell (3) and the valve seat (1), the inlet valve body (22) and the floating valve body (23) are arranged in sequence from left to right in the main valve body (21), the inlet valve body (22) is fixed to the main valve body (21), and the floating valve body (23) can be moved left and right The main valve body (21) is connected to the main valve body (21), a first liquid flow chamber (24) is formed between the left end of the floating valve body (23) and the right end of the inlet valve body (22), a second liquid flow chamber (25) is formed between the right end of the floating valve body (23) and the right end of the main valve body (21), a plurality of inlet holes (221) for communicating with the first liquid flow chamber (24) are circumferentially arranged on the inlet valve body (22), and a plurality of circumferential holes (221) are arranged on the floating valve body (23) The main valve body (21) is provided with a plurality of flow holes (211) which are distributed at intervals in the circumferential direction and are used to connect the first liquid flow chamber (24) and the second liquid flow chamber (25); the floating valve body (23) is also provided with a flow outlet hole (232) which is used to connect the second liquid flow chamber (25) and the annular liquid flow channel (6); and the side wall of the main valve body (21) is provided with a plurality of flow leakage holes (211) which are distributed at intervals in the circumferential direction and are used to connect the first liquid flow chamber (24) and the annular liquid flow channel (6); the characteristics are: The liquid flow control valve core assembly (2) further comprises a valve plate group (26), wherein the valve plate group (26) is coaxially fixed on the inner side of the inlet valve body (22), and the outer edge of the valve plate group (26) abuts against the inlet valve body (22) located outside the inlet hole (221) to block the passage between the inlet hole (221) and the first liquid flow chamber (24).

2. The external solenoid valve according to claim 1, characterized in that: A first annular flange (222) is provided on the inner side of the inlet valve body (22), and the first flange (222) abuts against the outer edge of the valve plate assembly (26).

3. The external solenoid valve according to claim 1, characterized in that: A second annular flange (223) is also provided on the inner side of the inlet valve body (22), and the second flange (223) abuts against the outer edge of the left end of the floating valve body (23).

4. The external solenoid valve according to claim 1, characterized in that: The middle part of the valve plate group (26) and the middle part of the inlet valve body (22) are axially fixed via a fastening assembly (27), and the fastening assembly (27) is axially penetrated in the valve plate group (26) and the inlet valve body (22).

5. The external solenoid valve according to any one of claims 1 to 4, characterized in that: The drive assembly comprises a movable armature push rod assembly (4) and an electromagnetic drive assembly (5); a concave cavity (31) is arranged at the right end of the magnetic shell (3); a magnetic shell inner column (32) is arranged in the middle of the inner end of the concave cavity (31); the magnetic shell inner column (32) extends from left to right along the axial direction of the magnetic shell (3); the inner side of the magnetic shell inner column (32) forms a receiving cavity (33) with an opening at the left end; the movable armature push rod assembly (4) is installed in the receiving cavity (33); the movable armature push rod assembly (5) is provided with a concave cavity (31) at the right end; the magnetic shell inner column (32) is provided with a concave cavity (31) at the middle of the inner end of the concave cavity (31); the magnetic shell inner column (32) extends from left to right along the axial direction of the magnetic shell (3); the inner side of the magnetic shell inner column (32) forms a receiving cavity (33) with an opening at the left end; the movable armature push rod assembly (4) is installed in the receiving cavity (33); the movable armature push rod assembly (5) is provided with a concave cavity (31) at the middle of the inner end of the concave cavity (31); the magnetic shell inner column (32) is provided with a concave cavity (31) at the right end; the magnetic shell inner column (32) is provided with a concave cavity (31) at the middle of the inner end of the magnetic shell (31); the magnetic shell inner column (32) is provided with a concave cavity (33) at the left end; the movable armature push rod assembly (4) is provided with a concave cavity (31) at the right end; the magnetic shell inner column (32) is provided with a concave cavity (31) at the middle of the inner end of the magnetic shell (31); the magnetic shell inner column (32) is provided with a concave cavity (33) at the left end; the magnetic shell inner column (32 A control head (41) is fixed to the left end of the valve seat (4); the electromagnetic drive assembly (5) is connected to the right end of the valve seat (1) and is used to apply an electromagnetic force to the movable armature push rod assembly (4) to drive the movable armature push rod assembly (4) to move leftward; the left end of the control head (41) abuts against the outlet end of the outflow hole (232) and is used to block the outflow hole (232); the electromagnetic drive assembly (5) comprises a housing (51), a rear magnetic conductive plate (52) and a winding bracket (53); the left portion of the housing (51) is provided with a left The mounting cavity (511) is open at one end, the rear magnetic conductive plate (52) is fixed on the inner end of the mounting cavity (511), the winding bracket (53) is arranged inside the mounting cavity (511), and the right end of the winding bracket (53) is fixed to the left end of the rear magnetic conductive plate (52), the winding bracket (53) and the rear magnetic conductive plate (52) are both arranged coaxially with the mounting cavity (511), a coil (54) is wound on the winding bracket (53), and a wiring terminal (54) is arranged on the right part of the housing (51). 512), the lead wire of the coil (54) passes through the wire hole on the rear magnetic conductive plate (52) and is electrically connected to the conductive pin in the terminal (512); the outer shell (51) is fixed to the right part of the valve seat (1), the right end of the magnetic conductive shell (3) abuts against the rear magnetic conductive plate (52), the winding bracket (53) is inserted into the gap between the outer wall of the inner column (32) of the magnetic conductive shell and the inner wall of the magnetic conductive shell (3), and the right end of the inner column (32) of the magnetic conductive shell abuts against the rear magnetic conductive plate (52).

6. The external solenoid valve according to claim 5, characterized in that: An embedding groove (513) is provided on the inner end of the installation cavity (511), and the rear magnetic conductive plate (52) is embedded in the embedding groove (513) and tightly matched with the embedding groove (513).

7. The external solenoid valve according to claim 5, characterized in that: The right end of the inner column (32) of the magnetic shell is coaxially provided with a protrusion (321) whose outer diameter is smaller than that of the inner column (32) of the magnetic shell, and the connection between the protrusion (321) and the right end of the inner column (32) of the magnetic shell forms an annular step (322), the protrusion (321) is inserted into the inner hole of the rear magnetic conductive plate (52), and the annular step (322) abuts against the left end of the rear magnetic conductive plate (52).

8. The external solenoid valve according to claim 5, characterized in that: The left end of the housing (51) is sleeved on the outside of the right end of the valve seat (1) and is tightly fitted with the valve seat (1).

9. The external solenoid valve according to claim 8, characterized in that: An annular groove (11) is provided on the outer peripheral wall of the valve seat (1), a sealing ring (7) is embedded in the annular groove (11), and the sealing ring (7) is tightly matched with the inner wall of the annular groove (11) and the inner wall of the outer shell (51).

10. An electronically controlled shock absorber, comprising an external solenoid valve as described in any one of claims 1 to 9, wherein the left end of the inlet valve body (22) is welded and fixed to the outer wall of the intermediate cylinder (8) in the electronically controlled shock absorber, and the inlet end of the inlet hole (221) is connected to the inner cavity of the intermediate cylinder (8), and the left end of the valve seat (1) is welded and fixed to the outer wall of the outer cylinder (9) in the electronically controlled shock absorber, and the outlet end of the annular liquid flow channel (6) is connected to the inner cavity of the outer cylinder (9).

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