Built-in electromagnetic valve structure for controlling damping of shock absorber

Abstract

The invention belongs to the technical field of vehicle shock absorbers, and discloses a built-in electromagnetic valve structure for controlling damping of a shock absorber. The electromagnetic part (A) comprises a shell (1), a solenoid sub-assembly (2), a valve sleeve sub-assembly (3), a second steel ball (16), a baffle ring (17), a magnetic core body (18) and a magnetic core body spring (19), and the hydraulic part (B) comprises a front yoke sleeve (5), a one-way valve plate (8), an adjusting limiting block (9), a valve port (10), a first steel ball (11), a one-way valve cover (12), a valve element (13), a valve element spring (14) and a fixed cover (15). The built-in electromagnetic valve structure for controlling damping of the shock absorber is simple in structure, a direct proportion control mode is achieved, power consumption is effectively reduced, the electromagnetic valve structure is of a split structure, the assembling difficulty is reduced, and the overall performance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle shock absorbers, and more specifically, relates to a solenoid valve structure for controlling the damping of a shock absorber with a built-in valve. Background Art

[0002] Shock absorbers are used to suppress the impact of shock absorption and adjustment from the road. They are widely used in vehicle shock absorption, and play a role in attenuating the vibration of the frame and body, improving the smoothness of the car's ride, providing a good driving experience, and improving the comfort of vehicle driving. Although the shock-absorbing spring can filter the vibration of the road during the driving process of the vehicle, the shock-absorbing spring itself will also have reciprocating motion, and the shock absorber is used to suppress the jumping of this shock-absorbing spring. The shock absorber is filled with oil and has two inner and outer chambers. The oil can flow through the pores connecting the two chambers. A damping solenoid valve is installed at the position to control the flow of the pores to control the damping force of the shock absorber. At present, most of the built-in solenoid valves used in the market to control the damping force are in inverse proportional control mode, that is, the larger the current, the smaller the damping force. The permanent soft mode (low damping force) requires a large current and consumes a lot of power.

[0003] In the prior art, there is a technology named "a solenoid valve damping shock absorber" and the publication number is "CN114877008A", which relates to a solenoid valve damping shock absorber, and relates to the technical field of shock absorbers, which includes a housing, a piston rod is slidably arranged on the end wall of the housing, a solenoid valve for adjusting the damping size of the piston rod in the housing is arranged in the housing, a connecting block is arranged on the side wall of the piston rod, a driving rod is fixedly connected to the connecting block, and a rack is arranged on the driving rod; a driving gear and a driven gear are rotatably arranged on the outer wall of the housing, the rack and the driving gear are meshed with each other, the driven gear and the driving gear are meshed with each other, and the diameter of the driven gear is smaller than the diameter of the driving gear; a power generation device is also arranged on the housing, and the rotor of the power generation device is connected to the driven gear; the power generation device is electrically connected to a battery, and the battery is used to power the solenoid valve. The present application is convenient for using the shock absorber and achieves the effect of energy saving and environmental protection.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, a solenoid valve structure for built-in control shock absorber damping is provided, which has a simple structure, realizes a proportional control mode, effectively reduces power consumption, is a split structure, reduces assembly difficulty, and improves overall performance.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0007] The present invention is a solenoid valve structure for built-in control of shock absorber damping, including an electromagnetic part and a hydraulic part. The electromagnetic part includes a housing, a solenoid sub-assembly, a valve sleeve sub-assembly, a second steel ball, a retaining ring, a magnetic core, and a magnetic core spring. The hydraulic part includes a front yoke sleeve, a one-way valve plate, a fixing screw (there are two one-way valve plates and two fixing screws), an adjustment limit block, a valve port, a first steel ball, a one-way valve cover, a valve core, a valve core spring, and a fixing cover. When the electromagnetic part is manufactured, the magnetic core spring and the magnetic core are sequentially placed in the valve sleeve sub-assembly, and then pressed into the retaining ring. The ring, retaining ring and valve sleeve sub-assembly are interference fit; install the solenoid sub-assembly into the housing, and then put the assembled valve sleeve sub-assembly into the housing; when making the hydraulic part, put the first steel ball into the valve core, and then install the one-way valve cover on the valve core; put the assembled valve core sub-assembly into the front yoke sleeve, put the valve core spring in, and press the fixing cover, the fixing cover and the front yoke sleeve are interference fit; put the valve port from the top of the valve core, and tighten the adjustment limit block; install the one-way valve plate and fixing screws on the top and side of the front yoke sleeve respectively; assemble the electromagnetic part and the hydraulic part together.

[0008] The magnetic core spring is located in the valve sleeve sub-assembly, one end of the magnetic core spring is against the bottom of the valve sleeve sub-assembly, and the other end of the magnetic core spring is against the magnetic core body. The retaining ring and the valve sleeve sub-assembly are fixedly connected, the retaining ring is close to the second steel ball, and the other side of the second steel ball is close to the fixed cover.

[0009] The first steel ball is located in the valve core, the one-way valve cover is installed on the valve core, the valve core is located in the front yoke sleeve, the valve port is located on the valve core, and the regulating limit block is tightened on the front yoke sleeve.

[0010] The solenoid valve structure for the built-in control shock absorber damping includes a P port, a T port, a pressure P1, a force surface S A1 、Stress surface S A2 , pilot flow channel.

[0011] The retaining ring and the valve sleeve sub-assembly are in interference fit; the first O-ring is sleeved in the ring groove of the outer ring of the valve sleeve sub-assembly, the solenoid sub-assembly is installed in the shell, and the valve sleeve sub-assembly is installed in the shell.

[0012] The top and side of the front yoke sleeve are respectively provided with a one-way valve sheet, and the side and top of the front yoke sleeve are provided with fixing screws for fixing the one-way valve sheet; a second O-ring is sleeved in the annular groove of the outer ring of the front yoke sleeve.

[0013] When the built-in electromagnetic valve structure for controlling the damping of the shock absorber enters the recovery state, the medium enters the force-bearing surface S from the P port. A1 On the upper surface, part of the medium flows from the small hole of the valve core to the center hole of the fixed cover, and the hydraulic oil entering from the P port acts on the force surface S A2 Upper, S A2 >S A1; When current is passed through the solenoid sub-assembly, the magnetic core generates electromagnetic force in the closing direction of the solenoid valve, pushing the second steel ball to block the center hole of the fixed cover. When the force of the medium entering the P port increases to a certain extent, the second steel ball is pushed away, and the medium flows through the pilot flow channel formed by the front yoke sleeve and the fixed cover to the T port, then P1 in the valve core is reduced. When P*S A1 >P*S A2 +F 弹 , the valve port is pushed open, the main flow channel opens, and the medium at the P port flows into the T port through the opening between the valve port and the regulating limit block; as the current passing through the solenoid sub-assembly increases, the P1 required to push the steel ball open becomes higher, achieving a proportional regulation effect.

[0014] When the built-in electromagnetic valve structure for controlling the damping of the shock absorber enters the compression state, the medium enters from the P port and acts on the force surface S through the first steel ball. A1 On the valve core, part of the medium flows from the small hole of the valve core to the T port, and the medium entering from the P port acts on the force surface S. A2 Upper, S A2 >S A1 ; When current is passed through the solenoid sub-assembly, the magnetic core generates electromagnetic force in the closing direction of the solenoid valve, pushing the second steel ball to block the center hole of the fixed cover. When the pressure at the P port increases to a certain level, the second steel ball is pushed away, and the medium flows through the pilot flow channel formed by the front yoke sleeve and the fixed cover to the T port, and the pressure P1 in the valve core decreases. When P*S A1 >P1*S A2 +F 弹 , the valve core is pushed open, the main flow channel opens, and the medium at the P port flows into the T port through the opening between the valve port and the valve core; as the current passing through the solenoid sub-assembly increases, the P1 required to push the second steel ball becomes higher, achieving a positive proportional regulation effect.

[0015] The first steel ball is a one-way valve steel ball.

[0016] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0017] The electromagnetic valve structure for built-in control shock absorber damping described in the present invention is manufactured into an electromagnetic part and a hydraulic part separately. The electromagnetic part includes a plurality of components, and the hydraulic part includes a plurality of components. When assembling the electromagnetic valve structure, the components of the electromagnetic part are assembled separately, and the components of the hydraulic part are assembled separately, and then the electromagnetic part and the hydraulic part are connected to form an integral structure of the electromagnetic valve structure for built-in control shock absorber damping. The electromagnetic valve structure for built-in control shock absorber damping can be changed between a restored state and a compressed state to meet working requirements. The structure of the present invention is a direct proportional control mode, and there is no need to solve the problem in the prior art that the greater the current, the smaller the damping force, and the permanent soft mode (low damping force) requires a large current and high power consumption. It is a direct proportional control mode, which can effectively reduce power consumption, and the split structure reduces the difficulty of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 It is a structural schematic diagram of the electromagnetic valve structure for built-in control shock absorber damping according to the present invention;

[0020] Figure 2 It is a structural schematic diagram of the electromagnetic valve structure for built-in control shock absorber damping according to the present invention;

[0021] Figure 3 It is a structural schematic diagram of the electromagnetic valve structure for built-in control shock absorber damping of the present invention when entering a recovery state;

[0022] Figure 4 It is a structural schematic diagram of the electromagnetic valve structure for built-in control of shock absorber damping of the present invention when it enters a compression state;

[0023] The marks in the attached drawings are: A, electromagnetic part; B, hydraulic part; 1, housing; 2, solenoid sub-assembly; 3, valve sleeve sub-assembly; 4, first O-ring; 5, front yoke sleeve; 6, fixing screw; 7, second O-ring; 8, one-way valve plate; 9, adjustment limit block; 10, valve port; 11, steel ball; 12, one-way valve cover; 13, valve core; 14, valve core spring; 15, fixing cover; 16, second steel ball; 17, retaining ring; 18, magnetic core; 19, magnetic core spring; 22, pressure P1; 23, force surface S A1 ; 24. Load surface S A2 ; 25. Pilot flow channel; 26. Main flow channel. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various components involved, the function and working principle of each part, etc., through the description of the embodiments with reference to the accompanying drawings:

[0025] As attached Figure 1 -Attached Figure 4 As shown, the present invention is a solenoid valve structure for built-in control of shock absorber damping, including an electromagnetic part A and a hydraulic part B. The electromagnetic part A includes a housing 1, a solenoid subassembly 2, a valve sleeve subassembly 3, a second steel ball 16, a retaining ring 17, a magnetic core 18, and a magnetic core spring 19. The hydraulic part B includes a front yoke sleeve 5, a one-way valve plate 8, a fixing screw 6 (there are two one-way valve plates and two fixing screws), an adjustment limit block 9, a valve port 10, a first steel ball 11, a one-way valve cover 12, a valve core 13, a valve core spring 14, and a fixing cover 15. When the electromagnetic part A is manufactured, the magnetic core spring 19 and the magnetic core 18 are sequentially placed in the valve sleeve subassembly 3, and then pressed into The retaining ring 17 is an interference fit with the valve sleeve sub-assembly 3; the solenoid sub-assembly 2 is installed into the housing 1, and then the assembled valve sleeve sub-assembly 3 is placed into the housing 1; when the hydraulic part B is made, the first steel ball 11 is placed into the valve core 13, and then the one-way valve cover 12 is installed on the valve core 13; the assembled valve core sub-assembly is placed into the front yoke sleeve 5, the valve core spring 14 is placed, and the fixing cover 15 is pressed, and the fixing cover 15 is an interference fit with the front yoke sleeve 5; the valve port 10 is placed from above the valve core 13, and the regulating limit block 9 is tightened; the one-way valve plate 8 and the fixing screw 6 are respectively installed on the side and top of the front yoke sleeve (5); the electromagnetic part A and the hydraulic part B are assembled together. The above structure proposes an improved technical solution to address the deficiencies in the prior art. When setting up the structure, the electromagnetic part A and the hydraulic part B are made separately. The electromagnetic part A includes multiple components, and the hydraulic part B includes multiple components. When assembling the electromagnetic valve structure, the components of the electromagnetic part A are assembled separately, and the components of the hydraulic part B are assembled, and then the electromagnetic part A and the hydraulic part B are connected to form an integral structure of a built-in control shock absorber damping electromagnetic valve structure. The built-in control shock absorber damping electromagnetic valve structure can be changed between a restored state and a compressed state to meet work requirements. The structure of the present invention is a proportional control mode, and there is no longer the problem that the larger the current, the smaller the damping force, and the permanent soft mode (low damping force) requires a large current and high power consumption in the prior art. The built-in control shock absorber damping electromagnetic valve structure described in the present invention has a simple structure, realizes a proportional control mode, effectively reduces power consumption, is a split structure, reduces assembly difficulty, and improves overall performance.

[0026] The magnetic core spring 19 is located in the valve sleeve sub-assembly 3, one end of the magnetic core spring 19 is against the bottom of the valve sleeve sub-assembly 3, and the other end of the magnetic core spring 19 is against the magnetic core 18. The retaining ring 17 is fixedly connected to the valve sleeve sub-assembly 3, the retaining ring 17 is close to the second steel ball 16, and the other side of the second steel ball 16 is close to the fixed cover 15. The above structure realizes the assembly of the electromagnetic part A. The components of the electromagnetic part A are respectively manufactured and formed, and then assembled, and then connected to the hydraulic part B.

[0027] The first steel ball 11 is located in the valve core 13, the one-way valve cover 12 is installed on the valve core 13, the valve core 13 is located in the front yoke sleeve 5, the valve port 10 is located on the valve core 13, and the regulating limit block 9 is tightened on the front yoke sleeve 13. The above structure realizes the assembly of the hydraulic part B. The components of the hydraulic part B are manufactured and formed separately, and then assembled, and then connected to the electromagnetic part A.

[0028] The solenoid valve structure for controlling the damping of the shock absorber includes a P port 20, a T port 21, a pressure P122, a force surface S A1 23. Load surface S A2 24. Pilot flow channel. The above structure,

[0029] The retaining ring 17 and the valve sleeve sub-assembly 3 are interference fit; the first O-ring 4 is sleeved in the ring groove of the outer ring of the valve sleeve sub-assembly 3, the solenoid sub-assembly 2 is installed in the housing 1, and the valve sleeve sub-assembly 3 is installed in the housing 1. In the above structure, the first O-ring 4 is sleeved in the ring groove of the outer ring of the valve sleeve sub-assembly 3 to achieve reliable sleeve fit, and the first O-ring 4 plays a role in reliably sealing the gap between the valve core assembly and the housing, ensuring that the medium will not leak easily, and improving performance.

[0030] The top and side of the front yoke sleeve 5 are respectively provided with a one-way valve plate 8, and the side and top of the front yoke sleeve 5 are provided with fixing screws 6 for fixing the one-way valve plate 8; the second O-ring 7 is sleeved in the annular groove of the outer ring of the front yoke sleeve 5. In the above structure, the second O-ring 7 is sleeved in the annular groove of the outer ring of the front yoke sleeve 5, and a reliable sleeve is achieved, and the second O-ring 7 is used to play a role of reliable sealing.

[0031] When the built-in electromagnetic valve structure for controlling the damping of the shock absorber enters the recovery state, the medium enters the force-bearing surface S from the P port 21. A1 23, part of the medium flows from the small hole of the valve core 13 to the central hole of the fixed cover 5, and the hydraulic oil entering from the P port 21 acts on the force surface S A2 24 up, S A2 >S A1; When current is passed through the solenoid subassembly 2, the magnetic core 18 generates electromagnetic force in the closing direction of the solenoid valve, pushing the second steel ball 16 to block the center hole of the fixed cover 15. When the force of the medium entering the P port 21 increases to a certain extent, the second steel ball 16 is pushed open, and the medium flows through the pilot flow channel 25 formed by the front yoke sleeve 5 and the fixed cover 15 to the T port 20, then P1 in the valve core 13 is reduced. When P*S A1 >P*S A2 +F 弹 , the valve port 13 is pushed open, the main flow channel 26 opens, and the medium of the P port 21 flows into the T port 20 through the opening between the valve port 13 and the regulating limit block 8; as the current passing through the solenoid sub-assembly 2 increases, the P1 required to push the steel ball 16 becomes higher, thereby achieving a positive proportional regulation effect. In the above structure, when the electromagnetic valve structure for built-in control shock absorber damping described in the present invention is in a working state, it can enter a recovery state to achieve a positive proportional regulation effect. In the structure of the present invention, the P port and the T port are opposite in the recovery state and the compression state. In the recovery state, the T port is T port 20, and the P port becomes P port 21.

[0032] When the built-in electromagnetic valve structure for controlling the damping of the shock absorber enters the compression state, the medium enters from the P port 20 and acts on the force-bearing surface SA123 through the first steel ball 11, and a part of the medium flows from the small hole of the valve core 13 to the T port 21. The medium entering from the P port 20 acts on the force-bearing surface SA224, S A2 >S A1 ; When current is passed through the solenoid subassembly 2, the magnetic core 18 generates electromagnetic force in the closing direction of the solenoid valve, pushing the second steel ball 16 to block the center hole of the fixed cover 15. When the pressure of the P port 20 increases to a certain level, the second steel ball 16 is pushed open, and the medium flows through the pilot flow channel formed by the front yoke sleeve 5 and the fixed cover 15 to the T port 21, and the pressure P122 in the valve core 13 decreases. When P*S A1 >P1*S A2 +F 弹 , the valve core 13 is pushed open, the main flow channel is opened, and the medium of the P port 20 flows into the T port 21 through the opening between the valve port 10 and the valve core 13; as the current passing into the solenoid sub-assembly 2 increases, the P1 required to push the second steel ball 16 is higher, achieving a positive proportional adjustment effect. In the above structure, when the built-in control shock absorber damping electromagnetic valve structure is in the working state, it can enter the compression state to achieve a positive proportional adjustment effect.

[0033] The first steel ball 11 is a one-way valve steel ball. 弹 Refers to the force of the core spring.

[0034] The electromagnetic valve structure for built-in control shock absorber damping described in the present invention is made into an electromagnetic part A and a hydraulic part B respectively. The electromagnetic part A includes multiple components, and the hydraulic part B includes multiple components. When assembling the electromagnetic valve structure, the components of the electromagnetic part A are assembled separately, and the components of the hydraulic part B are assembled separately, and then the electromagnetic part A and the hydraulic part B are connected to form an integral structure of the electromagnetic valve structure for built-in control shock absorber damping. The electromagnetic valve structure for built-in control shock absorber damping can change between a restored state and a compressed state. The structure of the present invention is a proportional control mode, and there is no need to solve the problem in the prior art that the greater the current, the smaller the damping force, and the permanent soft mode requires a large current and high power consumption. It is a proportional control mode, which can effectively reduce power consumption, and the split structure reduces the difficulty of assembly.

[0035] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A solenoid valve structure for controlling the damping of a shock absorber, characterized in that: The invention comprises an electromagnetic part (A) and a hydraulic part (B). The electromagnetic part (A) comprises a housing (1), a solenoid subassembly (2), a valve sleeve subassembly (3), a second steel ball (16), a retaining ring (17), a magnetic core (18), and a magnetic core spring (19). The hydraulic part (B) comprises a front yoke sleeve (5), a one-way valve plate (8), a fixing screw (6), an adjustment limit block (9), a valve port (10), a first steel ball (11), a one-way valve cover (12), a valve core (13), a valve core spring (14), and a fixing cover (15). When the electromagnetic part (A) is manufactured, the magnetic core spring (19) and the magnetic core (18) are sequentially placed in the valve sleeve subassembly (3), and then the retaining ring (17) is pressed in. The retaining ring (17) and the valve sleeve subassembly (19) are assembled together. 3) is an interference fit; install the solenoid subassembly (2) into the housing (1), and then put the assembled valve sleeve subassembly (3) into the housing (1); when manufacturing the hydraulic part (B), put the first steel ball (11) into the valve core (13), and then install the one-way valve cover (12) on the valve core (13); put the assembled valve core subassembly into the front yoke sleeve (5), put the valve core spring (14), and press the fixing cover (15), so that the fixing cover (15) and the front yoke sleeve (5) are interference fit; put the valve port (10) from the top of the valve core (13), and tighten the adjustment limit block (9); install the one-way valve plate (8) and the fixing screw (6) on the side and top of the front yoke sleeve (5) respectively; assemble the electromagnetic part (A) and the hydraulic part (B) together.

2. The electromagnetic valve structure for controlling the damping of a shock absorber according to claim 1, characterized in that: The magnetic core spring (19) is located in the valve sleeve sub-assembly (3), one end of the magnetic core spring (19) is against the bottom of the valve sleeve sub-assembly (3), and the other end of the magnetic core spring (19) is against the magnetic core (18). The retaining ring (17) and the valve sleeve sub-assembly (3) are fixedly connected, the retaining ring (17) is close to the second steel ball (16), and the other side of the second steel ball (16) is close to the fixed cover (15).

3. The electromagnetic valve structure for built-in control of shock absorber damping according to claim 1 or 2, characterized in that: The first steel ball (11) is located in the valve core (13), the one-way valve cover (12) is installed on the valve core (13), the valve core (13) is located in the front yoke sleeve (5), the valve port (10) is located on the valve core (13), and the regulating limit block (9) is tightened on the front yoke sleeve (5).

4. The electromagnetic valve structure for built-in control of shock absorber damping according to claim 1 or 2, characterized in that: The electromagnetic valve structure for controlling the damping of the shock absorber includes a P port (20), a T port (21), a pressure P1 (22), a force bearing surface S A1 (23) Load surface S A2 (24) Pilot flow channel.

5. The electromagnetic valve structure for built-in control of shock absorber damping according to claim 1 or 2, characterized in that: The retaining ring (17) and the valve sleeve sub-assembly (3) are interference fit; the first O-ring (4) is sleeved in the ring groove of the outer ring of the valve sleeve sub-assembly (3); the solenoid sub-assembly (2) is installed in the housing (1); and the valve sleeve sub-assembly (3) is installed in the housing (1).

6. The electromagnetic valve structure for built-in control of shock absorber damping according to claim 1 or 2, characterized in that: The top and side of the front yoke sleeve (5) are respectively provided with a one-way valve plate (8), and the side and top of the front yoke sleeve (5) are provided with fixing screws (6) for fixing the one-way valve plate (8); a second O-ring (7) is sleeved in the annular groove of the outer ring of the front yoke sleeve (5).

7. The electromagnetic valve structure for controlling the damping of a shock absorber according to claim 4, characterized in that: When the built-in electromagnetic valve structure for controlling the damping of the shock absorber enters the recovery state, the medium enters the force-bearing surface S from the P port (21). A1 (23), part of the medium flows from the small hole of the valve core (13) to the central hole of the fixed cover (5), and the hydraulic oil entering from the P port (21) acts on the force-bearing surface S A2 (24) Upper, S A2 >S A1 When current is passed through the solenoid subassembly (2), the magnetic core (18) generates electromagnetic force in the closing direction of the electromagnetic valve, pushing the second steel ball (16) to block the central hole of the fixed cover (15). When the force of the medium entering the P port (21) increases to a certain extent, the second steel ball (16) is pushed open, and the medium flows through the pilot flow channel (25) formed by the front yoke sleeve (5) and the fixed cover (15) to the T port (20), then P1 in the valve core (13) decreases. When P*S A1 >P*S A2 +F 弹 , the valve port (13) is pushed open, the main flow channel (26) is opened, and the medium in the P port (21) flows into the T port (20) through the opening between the valve port (13) and the regulating limit block (8); As the current flowing into the solenoid sub-assembly (2) increases, the P1 required to push the steel ball (16) away becomes higher, thereby achieving a proportional regulation effect.

8. The electromagnetic valve structure for controlling the damping of a shock absorber according to claim 4, characterized in that: When the built-in electromagnetic valve structure for controlling the damping of the shock absorber enters a compressed state, the medium enters from the P port (20) and acts on the force-bearing surface SA1 (23) through the first steel ball (11), wherein a part of the medium flows from the small hole of the valve core (13) to the T port (21), and the medium entering from the P port (20) acts on the force-bearing surface SA2 (24), S A2 >S A1 When current is passed through the solenoid subassembly (2), the magnetic core (18) generates electromagnetic force in the closing direction of the electromagnetic valve, pushing the second steel ball (16) to block the central hole of the fixed cover (15). When the pressure of the P port (20) increases to a certain level, the second steel ball (16) is pushed away, and the medium flows through the pilot flow channel formed by the front yoke sleeve (5) and the fixed cover (15) to the T port (21). Then, the pressure P1 (22) in the valve core (13) decreases. When P*S A1 >P1*S A2 +F 弹 , the valve core (13) is pushed open, the main flow channel is opened, and the medium in the P port (20) flows into the T port (21) through the opening between the valve port (10) and the valve core (13); as the current flowing into the solenoid sub-assembly (2) increases, the P1 required to push the second steel ball (16) becomes higher, thereby achieving a positive proportional regulation effect.

9. The electromagnetic valve structure for controlling the damping of a shock absorber according to claim 1 or 2, characterized in that: The first steel ball (11) is a one-way valve steel ball.

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