Electromagnetic valve for controlling damping of shock absorber

Abstract

The invention belongs to an electromagnetic valve for controlling damping of a shock absorber in the technical field of shock absorbers. The magnetic core body spring (17) and the magnetic core body (3) are sequentially installed in the valve sleeve sub-assembly (4), the magnetic core body spring (17) is clamped on one side of the magnetic core body (3), the front yoke sleeve (5) is installed in the valve sleeve sub-assembly (4) to form a press-fitting semi-finished product (22), the first one-way spring (74) and the first one-way valve plate (72) are installed in the valve element (71), the valve element (71) is connected with the valve deck (73) to form the valve element sub-assembly (7), and the valve deck (73) is connected with the valve element sub-assembly (7). A circulation valve plate (14), a supporting gasket (15), a magnetic core shaft (16), a valve element spring (13), a second one-way spring (12), a second one-way valve plate (11), a valve element sub assembly (7), a control valve plate (10) and a third one-way valve plate (8) are sequentially installed in a front yoke sleeve (5) of a press-fitting semi-finished product (22). According to the electromagnetic valve for controlling damping of the shock absorber, large damping force can be kept under the condition of power-on failure, power consumption is reduced, and meanwhile safety is still guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of shock absorbers, and more specifically, relates to a solenoid valve for controlling the damping of a shock absorber. 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, and 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, the built-in solenoid valves used in the market to control the damping force are mostly 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 for adjusting the damping of a shock absorber" and the publication number is "CN112815033A". The technology relates to the field of automotive parts and aims to solve the problem of complex valve body structure and large size in the prior art. A solenoid valve for adjusting the damping of a shock absorber is provided, which includes an electromagnetic drive subassembly and a valve body subassembly; the electromagnetic drive subassembly includes an outer shell subassembly; the end of the outer shell subassembly is provided with a step hole formed by an inward concave; the valve body subassembly includes an outer valve sleeve; the outer valve sleeve is fixedly fitted in the step hole near one end of the outer shell subassembly; the outer peripheral surface of the outer valve sleeve is provided with a first groove formed by an inward concave, and the first groove and the inner peripheral surface of the step hole form a first groove; the bottom surface of the outer valve sleeve is provided with a second groove that is radially connected to the inside and outside thereof, and a second groove is formed between the second groove and the bottom surface of the step hole; the first groove is connected to the second groove to form an oil outlet hole of a pilot valve. The beneficial effects of the present invention are that the structure is simpler, easy to process, the structural size can be set smaller, and the setting cost is also saved.

[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 prior art, a solenoid valve for controlling shock absorber damping is provided which has a simple structure, adopts a proportional control mode, and can maintain a large damping force in the event of power failure, thereby reducing power consumption while still ensuring safety; and has a short overall length, which can release more space for the shock absorber stroke; and can also increase the compression adjustment range so that the compression adjustment range can reach the level of the recovery adjustment range, thereby improving the overall performance of the solenoid valve for controlling shock absorber damping.

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

[0007] The present invention discloses an electromagnetic valve for controlling the damping of a shock absorber. A magnetic core spring and a magnetic core are sequentially installed in a valve sleeve sub-assembly. The magnetic core spring is clamped on one side of the magnetic core. A front yoke sleeve is installed in the valve sleeve sub-assembly to form a press-fit semi-finished product. A one-way spring and a one-way valve plate are installed in a valve core. The valve core is connected to a valve cover to form a valve core sub-assembly. A flow valve plate, a supporting gasket, a magnetic core shaft, a valve core spring, a two-way spring, a two-way valve plate, a valve core sub-assembly, a control valve plate and a three-way valve plate are sequentially installed in a front yoke sleeve of a press-fit semi-finished product. The valve sleeve sub-assembly of the press-fit semi-finished product is connected to an adjusting limit block to form a press-fit finished product. The electromagnetic valve for controlling the damping of a shock absorber comprises a reverse working energized state, a reverse working non-energized state, a forward working energized state and a forward working non-energized state.

[0008] The sealing gasket of the electromagnetic valve for controlling the damping of the shock absorber is located in the valve sleeve sub-assembly, the solenoid sub-assembly is located on the outer ring of the valve sleeve sub-assembly, the rear yoke sleeve is connected to the valve sleeve sub-assembly, and the locating pin fixes the circumferential angle between the rear yoke sleeve and the valve sleeve sub-assembly to ensure that the sealing gasket is located on the flow hole of the rear yoke sleeve and the sealing gasket fits the valve sleeve sub-assembly, and the large sealing ring of the rear yoke sleeve and the small sealing ring of the rear yoke sleeve are located in the corresponding sealing ring mounting grooves on the outer side of the rear yoke sleeve.

[0009] A support gasket is arranged in the front yoke sleeve, and the valve core spring abuts against the flow valve plate, the flow valve plate is close to the support gasket, and the flow valve plate of the electromagnetic valve for controlling the damping of the shock absorber has a flow groove.

[0010] The valve sleeve subassembly of the solenoid valve for controlling the damping of the shock absorber is provided with a P Rebound1 Port, set P on the rear yoke Rebound2 The valve core sub-assembly is provided with a center hole FX center , the flow hole, the solenoid valve for controlling the damping of the shock absorber is provided with a force surface S A1 、Stress surface S A2 , T-mouth.

[0011] The electromagnetic valve for controlling the damping of the shock absorber comprises a main flow channel, a pilot flow channel, an oil leakage flow channel and an opening.

[0012] The valve core sub-assembly comprises a valve core, a one-way valve plate, a valve cover and a one-way spring.

[0013] When the solenoid valve for controlling the damping of the shock absorber is in the reverse working state, the medium is Rebound1 Mouth and P Rebound2 When the medium enters from P Rebound1 Mouth and P Rebound2 Enter from P Rebound1 The medium entering the port acts on the force surface SA1 On the upper side, through the outer flow hole of the valve cover, the one-way valve 2 composed of one-way spring 2 and one-way valve plate 2 is opened, acting on the force surface S A2 Upper, S A2 >S A1 ; Then enter the valve core sub-assembly through the side flow hole of the valve core. Under the action of the one-way valve composed of a one-way spring and a one-way valve plate, the medium can only pass through the center hole FX of the valve core. center Outflow; current is passed through the solenoid sub-assembly, causing the magnetic core to generate electromagnetic force in the closing direction of the solenoid valve, pushing the magnetic core shaft to block the center hole FX of the valve core sub-assembly center , at this time the force surface S A1 Pressure P A1 = Load surface S A2 Pressure P A2 When P A2 Increase to the extent that it can push the magnetic core shaft, the magnetic core shaft is pushed open, the medium flows through the front yoke sleeve and the valve sleeve sub-assembly, opens the one-way valve three composed of the one-way valve plate three and flows to the T port. This flow channel is the pilot flow channel, then P A2 <P A1 When P A1 *S A1 >P A2 *S A2 , the control valve is pushed open, the main channel opens, P Rebound1 The medium entering the port flows into the T port through the opening between the control valve plate and the regulating limit block; as the current flowing into the solenoid sub-assembly increases, the P of the magnetic core shaft needs to be pushed open. A2 The higher the P A1 The higher it is, the more proportional regulation is achieved.

[0014] When the solenoid valve for controlling the damping of the shock absorber is in the reverse working state and is not energized, when the medium is Rebound1 When the oil enters the valve port, the small spring force provided by the magnetic core spring is not enough to overcome the liquid pressure brought by the medium, causing the magnetic core shaft to be pressed against the flow valve plate, and only the flow groove on the flow valve plate is used as a flow hole to drain oil. At this time, P A2 The decrease of P is controlled by the flow slot. When the flow area of ​​the flow slot is smaller than the flow area of ​​the pilot flow channel when power is on, a larger P is required when power is not on. A1 The main channel can be opened; at this time, the flow area of ​​the flow groove of the control flow valve plate controls P A1 size, the larger the circulation area, the greater the P A2 The faster the pressure relief, the A1 The smaller the flow area, the smaller the P A2 The slower the pressure relief, the A1 The larger the flow area, the greater the damping force can be maintained in the event of power failure.

[0015] When the solenoid valve for controlling the damping of the shock absorber is in the forward energized state, when the medium is compre Enter the mouth and act on the force surface S B1 The liquid flows through the inner flow hole of the valve cover, opens the one-way valve 1 composed of a one-way spring 1 and a one-way valve plate 1, and acts on the force surface S through the side flow hole of the valve core. A2 37 up, S A2 >S B1 ; Current is passed through the solenoid sub-assembly, causing the magnetic core to generate electromagnetic force in the closing direction of the solenoid valve, pushing the magnetic core shaft to block the center hole FX of the valve core sub-assembly center 34, at this time S B1 Surface pressure P B1 =S A2 Surface pressure P A2 When P A2 Increase to the extent that it can push the magnetic core shaft, the magnetic core shaft 16 is pushed open, and the medium flows through the front yoke sleeve, the magnetic core body, the valve sleeve sub-assembly, and the rear yoke sleeve to the T port, which is the pilot flow channel 39, then P A2 <P B1 When P B1 *S B1 >P A2 *S A2 , the control valve plate is pushed open, the main channel 38 opens, P compre The medium entering the port flows into the T port through the opening between the control valve plate and the valve cover; as the current flowing into the solenoid sub-assembly increases, the P of the magnetic core shaft needs to be pushed open. A2 The higher the P B1 The higher it is, the more proportional regulation effect is achieved.

[0016] When the solenoid valve for controlling the damping of the shock absorber is in the forward non-energized state, when the medium is compre When the oil enters the valve port, the small spring force provided by the magnetic core spring is not enough to overcome the liquid pressure brought by the medium, causing the magnetic core shaft to be pressed against the flow valve plate, and only the flow groove on the flow valve plate is used as a flow hole to drain oil. At this time, P A2 The decrease of P is controlled by the flow slot. When the flow area of ​​the flow slot is smaller than the flow area of ​​the pilot flow channel when power is on, a larger P is required when power is not on. B1 At this time, the flow area of ​​the flow groove of the control flow valve plate 14 can control P B1 size, the larger the circulation area, the greater the P A2 The faster the pressure relief, the B1 The smaller the flow area, the smaller the P A2 The slower the pressure relief, the B1 The larger the flow area, the greater the damping force can be maintained in the event of power failure.

[0017] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0018] The solenoid valve for controlling the damping of the shock absorber of the present invention can switch between multiple working states, including: reverse working energized state, reverse working non-energized state, forward energized state, and forward non-energized state. In the reverse working energized state, as the current flowing into the solenoid subassembly increases, the P of the magnetic core shaft needs to be pushed open. A2 The higher the P A1 The higher the value, the more proportional regulation effect is achieved; when working in the reverse direction without power supply, when a smaller flow area is used, a larger damping force can be maintained in the case of power failure; when in the forward power supply state, as the current flowing into the solenoid sub-assembly increases, the P of the magnetic core shaft needs to be pushed open. A2 The higher the P B1 The higher the value, the more proportional adjustment effect is achieved; in the forward non-powered state, when a smaller flow area is used, a larger damping force can be maintained in the event of power failure. The solenoid valve for controlling the damping of the shock absorber described in the present invention has a simple structure, adopts a proportional control mode, and can maintain a larger damping force in the event of power failure, reducing power consumption while still ensuring safety; and the overall length is short, which can release more space for the shock absorber stroke; it can also increase the compression adjustment range, so that the compression adjustment range can reach the level of the recovery adjustment range, and improve the overall performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following is a brief description of the contents and symbols in the drawings of this specification:

[0020] Figure 1 It is a structural schematic diagram of the solenoid valve for controlling the damping of the shock absorber according to the present invention;

[0021] Figure 2 It is a structural schematic diagram of the valve core sub-assembly of the solenoid valve for controlling the damping of the shock absorber according to the present invention;

[0022] Figure 3 It is a structural schematic diagram of a press-fit semi-finished product of a solenoid valve for controlling the damping of a shock absorber according to the present invention;

[0023] Figure 4 It is a structural schematic diagram of a press-fit finished product of a solenoid valve for controlling the damping of a shock absorber according to the present invention;

[0024] Figure 5 It is a structural schematic diagram of the reverse working state of the electromagnetic valve for controlling the damping of the shock absorber according to the present invention;

[0025] Figure 6 It is a structural schematic diagram of the reverse working energized state of the electromagnetic valve for controlling the damping of the shock absorber according to the present invention;

[0026] Figure 7 Schematic diagram of the reverse working non-energized state of the solenoid valve for controlling the damping of the shock absorber according to the present invention;

[0027] Figure 8 Schematic diagram of the forward working state of the solenoid valve for controlling the damping of the shock absorber according to the present invention;

[0028] Fig. 9 Schematic diagram of the forward working energized state of the solenoid valve for controlling the damping of the shock absorber according to the present invention;

[0029] Fig.10 Schematic diagram of the forward working non-energized state of the solenoid valve for controlling the damping of the shock absorber according to the present invention;

[0030] The labels in the drawings are respectively: 1. Rear yoke sleeve; 2. Solenoid assembly; 3. Core body; 4. Valve sleeve assembly; 5. Front yoke sleeve; 6. Valve sleeve sealing ring; 7. Spool assembly; 71. Spool; 72. One-way valve disc one; 73. Valve cover; 74. One-way spring one; 8. One-way valve disc three; 9. Adjusting limit block; 10. Control valve disc; 11. One-way valve disc two; 12. One-way spring two; 13. Spool spring; 14. Flow valve disc; 15. Support gasket; 16. Core shaft; 17. Core body spring; 18. Gasket; 19. Large rear yoke sleeve sealing ring; 20. Small rear yoke sleeve sealing ring; 21. Locating pin; 22. Press-fitting semi-finished product; 23. Press-fitting finished product; 31. P Rebound1 port; 32. P Rebound2 port; 34. Central hole FX center ; 35. Flow hole; 36. Force-receiving surface S A1 ; 37. Force-receiving surface S A2 ; 38. Main flow channel; 39. Pilot flow channel; 40. Oil drain flow channel; 43. P compre port; 44. Force-receiving surface S B1 . Detailed implementation manners

[0031] The following is a further detailed description of the specific implementation manners of the present invention, such as the shapes, structures of the various components involved, the mutual positions and connection relationships between the various parts, the functions of the various parts, and the working principles, etc., with reference to the drawings:

[0032] As shown in the attached Figure 1 - attached Figure 4As shown, the present invention is a solenoid valve for controlling the damping of a shock absorber, wherein a magnetic core spring 17 and a magnetic core 3 are sequentially installed in a valve sleeve sub-assembly 4, the magnetic core spring 17 is clamped on one side of the magnetic core 3, a front yoke sleeve 5 is installed in the valve sleeve sub-assembly 4, forming a press-fit semi-finished product 22, a one-way spring 74 and a one-way valve plate 72 are installed in a valve core 71, the valve core 71 is connected to a valve cover 73, forming a valve core sub-assembly 7, a flow valve plate 14, a support gasket 15, and a magnetic core shaft 1 6, valve core spring 13, one-way spring 2 12, one-way valve disc 2 11, valve core sub-assembly 7, control valve disc 10, one-way valve disc 3 8 are sequentially installed into the front yoke sleeve 5 of the pressed semi-finished product 22, the valve sleeve sub-assembly 4 of the pressed semi-finished product 22 is connected to the adjustment limit block 9 to form a pressed finished product 23, the solenoid valve for controlling the damping of the shock absorber includes a reverse working power-on state, a reverse working non-power-on state, a forward working power-on state and a forward working non-power-on state. The above structure proposes an improved technical solution to the deficiencies in the prior art. The solenoid valve for controlling the damping of the shock absorber can switch between multiple working states, and the working states include: reverse working power-on state, reverse working non-power-on state, forward power-on state, and forward non-power-on state. In the reverse working power-on state, as the current passed into the solenoid sub-assembly 2 increases, the P of the magnetic core shaft 10 needs to be pushed open. A2 The higher the P A1 The higher the value, the more proportional adjustment effect is achieved; when working in the reverse direction without power supply, when a smaller flow area is used, a larger damping force can be maintained in the case of power failure; when in the forward power supply state, as the current flowing into the solenoid sub-assembly 2 increases, the P of the magnetic core shaft 10 needs to be pushed away. A2 The higher the P B1 The higher the value, the more proportional adjustment effect is achieved; in the forward non-powered state, when a smaller flow area is used, a larger damping force can be maintained in the event of power failure. The solenoid valve for controlling the damping of the shock absorber described in the present invention has a simple structure, adopts a proportional control mode, and can maintain a larger damping force in the event of power failure, reducing power consumption while still ensuring safety; and the overall length is short, which can release more space for the shock absorber stroke; it can also increase the compression adjustment range, so that the compression adjustment range can reach the level of the recovery adjustment range, and improve the overall performance.

[0033] The sealing gasket 18 of the electromagnetic valve for controlling the damping of the shock absorber is located in the valve sleeve subassembly 4, the solenoid subassembly 2 is located in the outer ring of the valve sleeve subassembly 4, the rear yoke sleeve 1 is connected to the valve sleeve subassembly 4, the positioning pin 21 fixes the circumferential angle between the rear yoke sleeve 1 and the valve sleeve subassembly 4, ensures that the sealing gasket 18 is located on the flow hole 32 of the rear yoke sleeve 1, and the sealing gasket 18 fits the valve sleeve subassembly 4, the large sealing ring 19 of the rear yoke sleeve and the small sealing ring 20 of the rear yoke sleeve are located in the corresponding sealing ring installation groove on the outer side of the rear yoke sleeve 1. The support gasket 15 is set in the front yoke sleeve 5, and the valve core spring 13 is against the flow valve plate 14, the flow valve plate 14 is close to the support gasket 15, and the flow valve plate 14 of the electromagnetic valve for controlling the damping of the shock absorber has a flow groove. The above structure limits the specific structure of the electromagnetic valve, forms a special structure electromagnetic valve, and solves the technical problem.

[0034] When the electromagnetic valve for controlling the damping of the shock absorber is manufactured, the magnetic core spring 17 and the magnetic core 3 are sequentially placed in the valve sleeve sub-assembly 4, and then screwed / pressed into the front yoke sleeve 5 to form a press-fit semi-finished product 22, and the front yoke sleeve 5 and the valve sleeve sub-assembly 4 are threadedly connected / interference fit; a one-way spring 74 and a one-way valve plate 72 are placed in the valve core 71, and then screwed / pressed into the valve cover 73 to form the valve core sub-assembly 7, and the valve cover 73 and the valve core 71 are threadedly connected / interference fit; the flow valve plate 14, the support gasket 15, the magnetic core shaft 16, The valve core spring 13, the one-way spring 12, the one-way valve disc 11, the valve core sub-assembly 7, the control valve disc 10, and the one-way valve disc 8 are sequentially placed in the press-fit semi-finished product 22 and then screwed into / pressed into the adjusting limit block 9, and then the valve sleeve sealing ring 6 is inserted into the press-fit finished product 23. The adjusting limit block 9 and the press-fit semi-finished product 22 are threadedly connected / interference fit; then the sealing gasket 18, the solenoid sub-assembly 2, the rear yoke sleeve 1, the large rear yoke sleeve sealing ring 19, and the rear yoke sleeve sealing ring 20 are sequentially inserted from the thin end of the press-fit finished product 23 to form the solenoid valve assembly.

[0035] The valve sleeve subassembly 4 of the electromagnetic valve for controlling the damping of the shock absorber is provided with a P Rebound1 Port 31, set P on the rear yoke sleeve 1 Rebound2 Port 32, center hole FX is set on the valve core sub-assembly 7 center 34, the flow hole 35, the electromagnetic valve for controlling the damping of the shock absorber is provided with a force surface S A1 36. Load surface S A2 37, T port. The shock absorber damping solenoid valve includes a main flow channel 38, a pilot flow channel 39, an oil drain flow channel 40, and an opening. The valve core sub-assembly 7 includes a valve core 71, a one-way valve plate 72, a valve cover 73, and a one-way spring 74. The structure of the one-way valve 1, the one-way valve 2, and the one-way valve 3 can separate the flow channels for forward operation and reverse operation without affecting each other.

[0036] The shock absorber damping solenoid valve can switch between multiple working states:

[0037] As attached Figure 5 -Attached Figure 7 As shown, when the shock absorber damping solenoid valve is in the reverse working power-on state, the medium is Rebound1 Port 31 and P Rebound2 Port 32 enters, when the medium enters from P Rebound1 Port 31 and P Rebound2 Enter from port 32, Rebound1 The medium entering from port 31 acts on the force bearing surface S A1 36, through the outer flow hole of the valve cover 73, the one-way valve 2 composed of the one-way spring 212 and the one-way valve plate 211 is opened, acting on the force surface S A2 37 up, S A2 >S A1 Then enter the valve core sub-assembly 4 through the side flow hole of the valve core 71. Under the action of a one-way valve composed of a one-way spring 74 and a one-way valve plate 72, the medium can only pass through the center hole FX of the valve core 71. center 34 outflow; the solenoid sub-assembly 2 is supplied with current, so that the magnetic core body 3 generates an electromagnetic force in the closing direction of the solenoid valve, pushing the magnetic core shaft 16 to block the center hole FX of the valve core sub-assembly 7 center 34, at this time the force surface S A1 Pressure P of 36 A1 = Load surface S A2 37 pressure P A2 When P A2 Increase to the extent that it can push the magnetic core shaft 16, the magnetic core shaft 16 is pushed open, the medium flows through the front yoke sleeve 5, the valve sleeve sub-assembly 4, opens the one-way valve 3 composed of the one-way valve plate 3 8 and flows to the T port. This flow channel is the pilot flow channel 39, then P A2 <P A1 When P A1 *S A1 >P A2 *S A2 , the control valve plate 10 is pushed open, the main channel 38 is opened, P Rebound1 The medium entering from port 31 flows into port T through the opening between the control valve plate 10 and the regulating limit block 9; as the current flowing into the solenoid subassembly 2 increases, the P of the magnetic core shaft 10 needs to be pushed open. A2 The higher the P A1 The higher it is, the more proportional regulation is achieved.

[0038] When the solenoid valve for controlling the damping of the shock absorber is in the reverse working state and is not energized, when the medium is Rebound1 When the oil enters the port 31, the small spring force provided by the magnetic core spring 17 is insufficient to overcome the hydraulic pressure brought by the medium, causing the magnetic core shaft 16 to be pressed against the flow valve plate 14, and only the flow groove on the flow valve plate 14 is used as a flow hole to drain the oil. At this time, PA2 The decrease of P is controlled by the flow slot. When the flow area of ​​the flow slot is smaller than the flow area of ​​the pilot flow channel 39 when the power is on, a larger P is required when the power is off. A1 At this time, the flow area of ​​the flow groove of the control flow valve plate 14 is controlled by P A1 size, the larger the circulation area, the greater the P A2 The faster the pressure relief, the A1 The smaller the flow area, the smaller the P A2 The slower the pressure relief, the A1 The larger the flow area, the greater the damping force can be maintained in the event of power failure.

[0039] As attached Figure 8 -Attached Fig.10 As shown, when the solenoid valve for controlling the damping of the shock absorber is in the forward energized state, when the medium is from P compre Port 43 enters and acts on the force surface S B1 44, flows through the inner flow hole of the valve cover 73, opens the one-way valve 1 composed of a one-way spring 1 74 and a one-way valve plate 1 72, and acts on the force-bearing surface S through the side flow hole of the valve core 71. A2 37 up, S A2 >S B1 ; The solenoid sub-assembly 2 is supplied with current, so that the magnetic core 3 generates an electromagnetic force in the closing direction of the solenoid valve, pushing the magnetic core shaft 16 to block the center hole FX of the valve core sub-assembly 7 center 34, at this time S B1 Surface pressure P B1 =S A2 Surface pressure P A2 When P A2 Increase to the extent that it can push the magnetic core shaft 16, the magnetic core shaft 16 is pushed open, and the medium flows through the front yoke sleeve 5, the magnetic core body 3, the valve sleeve sub-assembly 4, and the rear yoke sleeve 1 to the T port, which is the pilot flow channel 39, then P A2 <P B1 When P B1 *S B1 >P A2 *S A2 , the control valve plate 10 is pushed open, the main channel 38 is opened, P compre The medium entering through port 43 flows into port T through the opening between the control valve plate 10 and the valve cover 73; as the current flowing into the solenoid subassembly 2 increases, the P of the magnetic core shaft 10 needs to be pushed open. A2 The higher the P B1 The higher it is, the more proportional regulation effect is achieved.

[0040] When the solenoid valve for controlling the damping of the shock absorber is in the forward non-energized state, when the medium is compreWhen the oil enters the port 43, the small spring force provided by the magnetic core spring 17 is insufficient to overcome the hydraulic pressure brought by the medium, causing the magnetic core shaft 16 to be pressed against the flow valve plate 14, and only the flow groove on the flow valve plate 14 is used as a flow hole to drain the oil. At this time, P A2 The decrease of P is controlled by the flow slot. When the flow area of ​​the flow slot is smaller than the flow area of ​​the pilot flow channel 39 when the power is on, a larger P is required when the power is off. B1 At this time, the flow area of ​​the flow groove of the control flow valve plate 14 can control P B1 size, the larger the circulation area, the greater the P A2 The faster the pressure relief, the B1 The smaller the flow area, the smaller the P A2 The slower the pressure relief, the B1 The larger the flow area, the greater the damping force can be maintained in the event of power failure.

[0041] The solenoid valve for controlling the damping of the shock absorber described in the present invention has the following innovative features: 1. The solenoid valve has a positive proportional adjustment effect, that is, the greater the current passed through, the greater the opening pressure of the solenoid valve; 2. In the non-powered state, the solenoid valve realizes the size of the damping force when power is on by controlling the flow area of ​​the flow groove of the flow valve plate 14; 3. The solenoid valve has a pilot structure in both forward and reverse operation, and a smaller electromagnetic force can be used to control a larger pressure; 4. The structures of the first one-way valve, the second one-way valve, and the third one-way valve separate the flow channels for forward operation and reverse operation without affecting each other.

[0042] 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 for controlling the damping of a shock absorber, characterized in that: The magnetic core spring (17) and the magnetic core (3) are sequentially installed in the valve sleeve sub-assembly (4), the magnetic core spring (17) is clamped on one side of the magnetic core (3), the front yoke sleeve (5) is installed in the valve sleeve sub-assembly (4), forming a press-fit semi-finished product (22), a one-way spring (74) and a one-way valve plate (72) are installed in the valve core (71), the valve core (71) is connected to the valve cover (73), forming a valve core sub-assembly (7), a flow valve plate (14), a support gasket (15), a magnetic core shaft (16), and a valve core spring. A spring (13), a second one-way spring (12), a second one-way valve plate (11), a valve core subassembly (7), a control valve plate (10), and a third one-way valve plate (8) are sequentially installed in a front yoke sleeve (5) of a press-fit semi-finished product (22); a valve sleeve subassembly (4) of the press-fit semi-finished product (22) is connected to an adjusting limit block (9) to form a press-fit finished product (23); the shock absorber damping solenoid valve includes a reverse working energized state, a reverse working non-energized state, a forward working energized state, and a forward working non-energized state.

2. The solenoid valve for controlling shock absorber damping according to claim 1, characterized in that: The sealing gasket (18) of the electromagnetic valve for controlling the damping of the shock absorber is located in the valve sleeve sub-assembly (4), the solenoid sub-assembly (2) is located on the outer ring of the valve sleeve sub-assembly (4), the rear yoke sleeve (1) is connected to the valve sleeve sub-assembly (4), the positioning pin (21) fixes the circumferential angle between the rear yoke sleeve (1) and the valve sleeve sub-assembly (4), ensures that the sealing gasket (18) is located on the flow hole (32) of the rear yoke sleeve (1), and the sealing gasket (18) fits the valve sleeve sub-assembly (4), and the large sealing ring (19) of the rear yoke sleeve and the small sealing ring (20) of the rear yoke sleeve are located in the corresponding sealing ring installation grooves on the outer side of the rear yoke sleeve (1).

3. The solenoid valve for controlling the damping of a shock absorber according to claim 1 or 2, characterized in that: A support gasket (15) is arranged in the front yoke sleeve (5), and the valve core spring (13) abuts against the circulation valve plate (14), the circulation valve plate (14) is close to the support gasket (15), and the circulation valve plate (14) of the electromagnetic valve for controlling the damping of the shock absorber has a circulation groove.

4. The solenoid valve for controlling shock absorber damping according to claim 1 or 2, characterized in that: The valve sleeve subassembly (4) of the electromagnetic valve for controlling the damping of the shock absorber is provided with a P Rebound1 Port (31), P is set on the rear yoke sleeve (1) Rebound2 The valve core sub-assembly (7) is provided with a center hole FX center (34), the flow hole (35), the electromagnetic valve for controlling the damping of the shock absorber is provided with a force surface S A1 (36) Load surface S A2 (37) T-mouth.

5. The solenoid valve for shock absorber damping according to claim 4, characterized in that: The shock absorber damping electromagnetic valve comprises a main flow channel (38), a pilot flow channel (39), an oil drain flow channel (40), and an opening.

6. The solenoid valve for shock absorber damping according to claim 5, characterized in that: The valve core sub-assembly (7) comprises a valve core (71), a one-way valve plate (72), a valve cover (73), and a one-way spring (74).

7. The solenoid valve for shock absorber damping according to claim 6, characterized in that: When the solenoid valve for shock absorber damping is in the reverse working and energized state, the medium enters from the P Rebound1 port (31) and the P Rebound2 port (32). When the medium enters from the P Rebound1 port (31) and the P Rebound2 port (32), and the medium entering from the P Rebound1 port (31) acts on the force-bearing surface S A1 (36), through the outer circulation hole of the valve cover (73), the check valve two composed of the check spring two (12) and the check valve piece two (11) is opened, and acts on the force-bearing surface S A2 (37), S A2 > S A1 ; Then it enters the inside of the spool assembly (4) through the side circulation hole of the spool (71). Under the action of the check valve one composed of the check spring one (74) and the check valve piece one (72), the medium can only flow out through the central hole FX center (34) of the spool (71); The solenoid assembly (2) is energized, so that the magnetic core body (3) generates an electromagnetic force in the solenoid valve closing direction, and pushes the magnetic core shaft (16) to block the central hole FX center (34) of the spool assembly (7), and at this time the pressure P A1 on the force-bearing surface S A1 = the pressure P A2 on the force-bearing surface S A2 ; When P A2 increases to the extent that it can push the magnetic core shaft (16), the magnetic core shaft (16) is pushed open, and the medium flows through the front yoke sleeve (5) and the valve sleeve assembly (4), opens the check valve three composed of the check valve piece three (8) and flows to the T port. This flow channel is the pilot flow channel (39), then P A2 < P A1 ; When P A1 * S A1 > P A2 * S A2 , the control valve piece (10) is pushed open, the main flow channel (38) is opened, and the medium entering from the P Rebound1 port (31) flows into the T port through the opening between the control valve piece (10) and the adjustment limit block (9); As the current flowing into the solenoid assembly (2) is larger, the P A2 required to push the magnetic core shaft (10) is higher, then P A1 is higher, achieving proportional adjustment.

8. The solenoid valve for shock absorber damping according to claim 7, characterized in that: When the solenoid valve for shock absorber damping is in reverse working and not powered, when the medium is Rebound1 When the oil enters the port (31), the small spring force provided by the magnetic core spring (17) is insufficient to overcome the hydraulic pressure brought by the medium, causing the magnetic core shaft (16) to be pressed against the flow valve plate (14). Only the flow groove on the flow valve plate (14) serves as a flow hole for oil leakage. At this time, P A2 The decrease is controlled by the flow slot. When the flow area of ​​the flow slot is smaller than the flow area of ​​the pilot flow channel (39) when the power is on, a larger P is required when the power is not on. A1 The main flow channel (38) can be opened; at this time, the flow area of ​​the flow groove of the control flow valve plate (14) is controlled P A1 Size, the larger the circulation area, P A2 The faster the pressure relief, the A1 The smaller the flow area, the smaller the P A2 The slower the pressure relief, the A1 The larger the flow area, the greater the damping force can be maintained in the event of power failure.

9. The solenoid valve for shock absorber damping according to claim 6, characterized in that: When the solenoid valve for shock absorber damping is in the forward energized state, when the medium is from P compre The port (43) enters and acts on the force-bearing surface S B1 (44), flows through the inner flow hole of the valve cover (73), opens the one-way valve 1 composed of a one-way spring 1 (74) and a one-way valve plate 1 (72), and acts on the force-bearing surface S through the side flow hole of the valve core (71). A2 (37) Upper, S A2 >S B1 The solenoid sub-assembly (2) is supplied with current, so that the magnetic core (3) generates an electromagnetic force in the closing direction of the solenoid valve, pushing the magnetic core shaft (16) to block the center hole FX of the valve core sub-assembly (7) center (34), at this time S B1 Surface pressure P B1 =S A2 Surface pressure P A2 When P A2 When the pressure increases to a level that can push the magnetic core shaft (16), the magnetic core shaft (16) is pushed away, the medium flows through the front yoke sleeve (5), the magnetic core body (3), the valve sleeve sub-assembly (4), and the rear yoke sleeve (1) to the T port, which is the pilot flow channel (39). Then P A2 <P B1 When P B1 *S B1 >P A2 *S A2 , the control valve plate (10) is pushed open, the main channel (38) opens, P compre The medium entering through the port (43) flows into the T port through the opening between the control valve plate (10) and the valve cover (73); as the current flowing into the solenoid subassembly (2) increases, the P of the magnetic core shaft (10) needs to be pushed open. A2 The higher the P B1 The higher it is, the more proportional regulation effect is achieved.

10. The solenoid valve for shock absorber damping according to claim 6, characterized in that: When the solenoid valve for shock absorber damping is in the forward non-energized state, when the medium is from P compre When the oil enters the port (43), the small spring force provided by the magnetic core spring (17) is insufficient to overcome the hydraulic pressure brought by the medium, causing the magnetic core shaft (16) to be pressed against the flow valve plate (14). Only the flow groove on the flow valve plate (14) serves as a flow hole for oil leakage. At this time, P A2 The decrease is controlled by the flow slot. When the flow area of ​​the flow slot is smaller than the flow area of ​​the pilot flow channel (39) when the power is on, a larger P is required when the power is not on. B1 At this time, the flow area of ​​the flow groove of the control flow valve plate (14) can control P B1 Size, the larger the circulation area, P A2 The faster the pressure relief, the B1 The smaller the flow area, the smaller the P A2 The slower the pressure relief, the B1 The larger the flow area, the greater the damping force can be maintained in the event of power failure.

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