Variable damping force shock absorber

Abstract

The utility model discloses a variable damping force shock absorber, and belongs to the technical field of shock absorbers. According to the variable damping force shock absorber, the piston body is provided with the inner cavity, the first damping valve, the second damping valve and the electromagnetic valve are all arranged in the inner cavity, the structure is simple, assembly is facilitated, and the size of the shock absorber is reduced. The flow and the flow speed of fluid entering the electromagnetic valve can be controlled by adjusting the opening degree of the electromagnetic valve, so that the flow and the flow speed of the fluid introduced into the first branch cavity are adjustable, and then the damping force provided by the first damping valve is controlled. Meanwhile, the damping force provided by the first damping valve can be adjusted by replacing the first damping valve elements of different models. The damping force provided by the second damping valve can be adjusted by replacing the second damping valve elements of different models, and then the damping effect of the variable damping force shock absorber is improved.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, and in particular to a variable damping force vibration damper. Background Technology

[0002] Shock absorbers are used to dampen vibrations in a car's suspension system, thereby stabilizing the vehicle body. To improve vehicle stability, a variable damping force shock absorber has been proposed in related technologies. This type of shock absorber uses solenoid valves to adjust the fluid flow rate and path through the damping valve, thus allowing the damping force provided by the shock absorber to be adjusted. However, in this type of shock absorber, the layout of the solenoid valve and damping valve is unreasonable, their structure is complex, and they occupy a large volume. If the volume of the shock absorber cylinder is not increased, the fluid volume inside the shock absorber cylinder will decrease, affecting the shock absorber's damping effect; if the volume of the shock absorber cylinder is increased, it will be detrimental to vehicle assembly. Utility Model Content

[0003] The purpose of this invention is to provide a variable damping force vibration damper that can not only adjust the damping force, but also has a simple structure, small size, and can improve the vibration reduction effect.

[0004] To achieve the above objectives, the following technical solution is provided:

[0005] Variable damping force vibration damper, including:

[0006] cylindrical body;

[0007] A piston body is slidably disposed in the cavity of the cylinder along the axial direction of the cylinder body, the piston body dividing the cylinder body into a first cavity and a second cavity that are not connected to each other, and the piston rod of the piston body is located in the first cavity or the second cavity; the piston body includes an inner cavity, a first valve port and a second valve port, the first valve port communicating with the first cavity and the second valve port communicating with the second cavity;

[0008] The first damping valve includes a first valve body and a first damping valve core. The first valve body is fixed in the inner cavity and includes a first valve cavity A and a first valve cavity B that are isolated from each other. The first damping valve core is disposed in the first valve cavity A and divides the first valve cavity A into a first sub-cavity and a second sub-cavity. The first valve cavity B is in communication with the second valve port.

[0009] The second damping valve includes a second valve body and a second damping valve core. The second valve body is fixedly disposed within the inner cavity and includes a second chamber C and a second chamber D that are isolated from each other. The second damping valve core is disposed within the second valve chamber C and divides the second valve chamber C into a third sub-chamber and a fourth sub-chamber. The third sub-chamber communicates with the first valve chamber B, and the fourth sub-chamber communicates with the first valve port. The second valve chamber D communicates with both the second sub-chamber and the first valve port.

[0010] The solenoid valve has one end port connected to the second valve port and the other end port connected to the first compartment. The opening degree of the solenoid valve is adjustable, and the power supply harness of the solenoid valve passes through the piston rod.

[0011] As a preferred embodiment of the aforementioned variable damping force vibration damper, the piston rod is located in the second chamber; the damping force of the first damping valve is less than the damping force of the second damping valve.

[0012] As a preferred embodiment of the aforementioned variable damping force vibration damper, the first damping valve core includes:

[0013] A first core is disposed between the first sub-cavity and the second sub-cavity. The first core is provided with a first valve hole and a second valve hole that are isolated from each other. The two ends of the first valve hole are respectively located in the first sub-cavity and the second sub-cavity, and the two ends of the second valve hole are respectively located in the first sub-cavity and the second sub-cavity.

[0014] The first valve plate group is disposed at one end of the first valve hole located in the second compartment.

[0015] The second valve plate assembly is disposed at one end of the second valve hole located within the first compartment.

[0016] And / or, the second damping valve core includes:

[0017] The second core is located between the third and fourth sub-cavities. The second core is provided with a third valve hole and a fourth valve hole that are isolated from each other. The two ends of the third valve hole are located in the third and fourth sub-cavities, respectively. The two ends of the fourth valve hole are located in the third and fourth sub-cavities, respectively.

[0018] The third valve plate group is disposed at one end of the third valve hole located in the fourth sub-cavity;

[0019] The fourth valve plate group is disposed at one end of the fourth valve hole located within the third sub-cavity.

[0020] As a preferred technical solution of the above-mentioned variable damping force vibration damper, the piston body includes a piston body and a valve sleeve. The valve sleeve is disposed in the second cavity and is fixedly connected to the piston body. The valve sleeve and the piston body form the inner cavity. The second valve port is opened in the valve sleeve, and the first valve port is opened in the piston body.

[0021] As a preferred technical solution of the above-mentioned variable damping force vibration damper, a gap is provided between the outer peripheral wall of the valve sleeve and the inner peripheral wall of the cylinder, and the second valve port communicates with the second cavity through the gap.

[0022] As a preferred technical solution for the aforementioned variable damping force vibration damper, the solenoid valve includes:

[0023] The third valve body is fixedly disposed within the inner cavity, and the third valve body is provided with a third valve chamber;

[0024] A valve plate is disposed in the third valve chamber, which divides the third valve chamber into a fifth sub-chamber and a sixth sub-chamber. The fifth sub-chamber is connected to the second valve port, and the sixth sub-chamber is connected to the first sub-chamber. The valve plate is provided with an adjusting valve hole for connecting the fifth sub-chamber and the sixth sub-chamber.

[0025] An electromagnetic drive assembly is connected to the valve plate and is capable of driving the valve plate to move in order to adjust the effective flow area of ​​the regulating valve orifice.

[0026] As a preferred technical solution of the above-mentioned variable damping force vibration damper, the first compartment is provided with a first opening, and the third valve body is covered by the first opening;

[0027] And / or, the second sub-cavity is provided with a second opening, and a connecting valve body is provided between the first valve body and the second valve body. The connecting valve body covers the second opening, and the connecting valve body includes a connecting valve cavity, which is connected to the second sub-cavity and the second valve cavity D respectively.

[0028] As a preferred technical solution of the above-mentioned variable damping force vibration damper, the outer peripheral wall of the third valve body is provided with a first missing part, and a third cavity is formed between the inner wall of the first missing part and the inner wall of the inner cavity, and the fifth sub-cavity is connected to the second valve port through the third cavity.

[0029] As a preferred technical solution of the above-mentioned variable damping force vibration damper, the outer peripheral wall of the first valve body is provided with a second missing part, and the inner wall of the second missing part and the inner wall of the inner cavity form the first valve cavity B, and one end of the first valve cavity B is connected to the third cavity.

[0030] The outer peripheral wall of the connecting valve body is provided with a third missing part, and a fourth cavity is formed between the inner wall of the third missing part and the inner wall of the inner cavity. The other end of the first valve cavity B is connected to the third sub-cavity through the fourth cavity.

[0031] As a preferred technical solution for the aforementioned variable damping force vibration damper, the electromagnetic drive assembly includes:

[0032] A movable armature and a magnetic sleeve, wherein the movable armature is movably disposed within the magnetic sleeve and the movable armature is connected to the valve plate;

[0033] An elastic element is connected between the moving armature and the magnetic sleeve;

[0034] An electromagnetic coil assembly is sleeved on the outside of the magnetic sleeve, and the power supply harness of the electromagnetic coil assembly passes through the piston rod of the piston body.

[0035] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0036] The variable damping force vibration damper of this utility model has an inner cavity in the piston body, and the first damping valve, the second damping valve and the solenoid valve are all located in the inner cavity. This not only simplifies the structure, but also facilitates assembly and reduces the size of the vibration damper.

[0037] By adjusting the opening of the solenoid valve, the flow rate and velocity of the fluid entering the solenoid valve can be controlled, making the flow rate and velocity of the fluid entering the first chamber adjustable, thereby controlling the damping force provided by the first damping valve. Simultaneously, by replacing different models of the first damping valve core, the damping force required to open the first damping valve core when the fluid flows from the first chamber to the second chamber, or from the second chamber to the first chamber, can be changed, thus adjusting the damping force provided by the first damping valve. Similarly, by replacing different models of the second damping valve core, the damping force required to open the second damping valve core when the fluid flows from the third chamber to the fourth chamber, or from the fourth chamber to the third chamber, can be changed, thus adjusting the damping force provided by the second damping valve and improving the vibration reduction effect of the variable damping force vibration damper. Attached Figure Description

[0038] Figure 1 This is a cross-sectional view of the variable damping force vibration damper in an embodiment of this utility model;

[0039] Figure 2 This is a partial cross-sectional view of the variable damping force vibration damper in an embodiment of this utility model;

[0040] Figure 3 This is a schematic diagram showing the relationship between the damping force of the variable damping force vibration damper and the flow velocity of the fluid in an embodiment of this utility model.

[0041] Figure 4 This is a schematic diagram of the piston body in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the first structure of the first damping valve core in an embodiment of this utility model;

[0043] Figure 6 This is a schematic diagram of the second structure of the first damping valve core in an embodiment of this utility model;

[0044] Figure 7 This is a schematic diagram of the first structure of the first damping valve in an embodiment of this utility model;

[0045] Figure 8 This is a schematic diagram of the second structure of the first damping valve in an embodiment of the present invention;

[0046] Figure 9 This is a schematic diagram of the first structure of the second damping valve core in an embodiment of this utility model;

[0047] Figure 10 This is a schematic diagram of the second structure of the second damping valve core in an embodiment of this utility model;

[0048] Figure 11 This is a schematic diagram of the structure connecting the valve body in an embodiment of this utility model;

[0049] Figure 12 This is a schematic diagram of the first structure of the third valve body in an embodiment of the present utility model;

[0050] Figure 13 This is a schematic diagram of the second structure of the third valve body in an embodiment of this utility model;

[0051] Figure 14 This is a schematic diagram of the valve plate structure in an embodiment of this utility model;

[0052] Figure 15 This is a schematic diagram of the flow path of fluid through the first damping valve and the second damping valve in an embodiment of this utility model.

[0053] Figure label:

[0054] 1. Cylinder body; 11. First cavity; 12. Second cavity;

[0055] 2. Piston body; 2a. Piston body; 2b. Valve sleeve; 2b1. Clearance; 21. Piston rod; 22. First valve port; 23. Second valve port;

[0056] 3. First damping valve; 31. First valve body; 3111. First chamber; 3112. Second chamber; 312. First valve cavity B; 32. First damping valve core; 321. First core body; 3211. First valve hole; 3212. Second valve hole; 3213. First boss; 3214. Second boss; 3215. Third boss; 322. First valve plate assembly; 323. Second valve plate assembly;

[0057] 4. Second damping valve; 41. Second valve body; 4111. Third chamber; 4112. Fourth chamber; 412. Second valve chamber D; 42. Second damping valve core; 421. Second core body; 4211. Third valve hole; 4212. Fourth valve hole; 4213. Fourth boss; 4214. Fifth boss; 4215. Sixth boss; 422. Third valve plate assembly; 423. Fourth valve plate assembly;

[0058] 5. Solenoid valve; 51. Third valve body; 511. Fifth sub-chamber; 512. Sixth sub-chamber; 513. Radial cavity; 514. Axial cavity; 515. Mounting hole; 52. Valve plate; 521. Adjusting valve hole; 53. Electromagnetic drive assembly; 531. Moving armature; 532. Magnetic sleeve; 533. Elastic element; 534. Electromagnetic coil assembly; 535. Power supply harness;

[0059] 6. Connect the valve body; 61. Connect the valve chamber. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0061] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0062] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0063] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0064] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0065] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0066] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0067] like Figures 1-15 As shown, this embodiment provides a variable damping force vibration damper, including a cylinder 1, a piston 2, a first damping valve 3, a second damping valve 4, and a solenoid valve 5.

[0068] The piston body 2 is slidably disposed in the cavity of the cylinder body 1. The piston body 2 divides the cavity into a first cavity 11 and a second cavity 12 that are not connected to each other. The piston rod 21 of the piston body 2 is located in the first cavity 11 or the second cavity 12. The piston body 2 includes an inner cavity, a first valve port 22 and a second valve port 23. The first valve port 22 is connected to the first cavity 11 and the second valve port 23 is connected to the second cavity 12.

[0069] The first damping valve 3 includes a first valve body 31 and a first damping valve core 32. The first valve body 31 is fixed in the inner cavity and includes a first valve cavity A and a first valve cavity B 312 that are isolated from each other. The first damping valve core 32 is disposed in the first valve cavity A and divides the first valve cavity A into a first sub-cavity 3111 and a second sub-cavity 3112. The first valve cavity B 312 is connected to the second valve port 23.

[0070] The second damping valve 4 includes a second valve body 41 and a second damping valve core 42. The second valve body 41 is fixed in the inner cavity and includes a second chamber 12 C and a second chamber 12 D that are isolated from each other. The second damping valve core 42 is disposed in the second valve chamber C and divides the second valve chamber C into a third sub-chamber 4111 and a fourth sub-chamber 4112. The third sub-chamber 4111 is connected to the first valve chamber B312, and the fourth sub-chamber 4112 is connected to the first valve port 22. The second valve chamber D412 is connected to the second sub-chamber 3112 and the first valve port 22 respectively.

[0071] One end of the solenoid valve 5 is connected to the second valve port 23, and the other end is connected to the first chamber 3111. The opening of the solenoid valve 5 is adjustable, and the power supply harness 535 of the solenoid valve 5 is passed through the piston rod 21.

[0072] In this embodiment of the variable damping force vibration damper, the piston body 2 is provided with an inner cavity, and the first damping valve 3, the second damping valve 4 and the solenoid valve 5 are all located in the inner cavity. This not only simplifies the structure but also facilitates assembly and reduces the volume of the vibration damper.

[0073] When the fluid pressure in the first chamber 11 increases, the fluid in the first chamber 11 will enter the first valve port 22. A portion of the fluid entering the first valve port 22 enters the second valve chamber D412, and then flows into the second sub-chamber 3112. This portion of fluid pushes open the first damping valve core 32 and enters the first sub-chamber 3111, then flows into the solenoid valve 5, and finally enters the second chamber 12 through the second valve port 23. Another portion of the fluid entering the first valve port 22 enters the fourth sub-chamber 4112. This portion of fluid pushes open the second damping valve core 42 and enters the third sub-chamber 4111, and then sequentially enters the second chamber 12 through the first valve chamber B312 and the second valve port 23.

[0074] When the fluid pressure in the second chamber 12 increases, the fluid in the second chamber 12 will enter the second valve port 23. A portion of the fluid entering the second valve port 23 enters the solenoid valve 5, and after passing through the solenoid valve 5, it enters the first sub-chamber 3111. This portion of fluid pushes open the first damping valve core 32 and enters the second sub-chamber 3112, and then sequentially passes through the second valve chamber D412 and the first valve port 22 into the first chamber 11. Another portion of the fluid entering the second valve port 23 enters the first valve chamber B312, and then enters the third sub-chamber 4111. This portion of fluid pushes open the second damping valve core 42 and enters the fourth sub-chamber 4112, and finally passes through the first valve port 22 into the first chamber 11.

[0075] By adjusting the opening degree of solenoid valve 5, the flow rate and velocity of the fluid entering solenoid valve 5 can be controlled, making the flow rate and velocity of the fluid entering the first chamber 3111 adjustable, thereby controlling the damping force provided by the first damping valve 3. Simultaneously, by replacing different models of the first damping valve core 32, the damping force required for the first damping valve core 32 to open when the fluid flows from the first chamber 3111 to the second chamber 3112, or from the second chamber 3112 to the first chamber 3111, can be changed, thus adjusting the damping force provided by the first damping valve 3. Similarly, by replacing different models of the second damping valve core 42, the damping force required for the second damping valve core 42 to open when the fluid flows from the third chamber 4111 to the fourth chamber 4112, or from the fourth chamber 4112 to the third chamber 4111, can be changed, thus adjusting the damping force provided by the second damping valve 4, thereby improving the vibration reduction effect of the variable damping force vibration damper.

[0076] Optionally, the piston rod 21 is located in the second chamber 12. That is, when the variable damping force damper is in the compression stroke, the fluid pressure in the first chamber 11 increases; when the variable damping force damper is in the recovery stroke, the fluid pressure in the second chamber 12 increases. Since the second valve port 23 is connected to the second chamber 12, the solenoid valve 5 is located between the first sub-chamber 3111 and the second valve port 23. That is, the solenoid valve 5 is closer to the second chamber 12. By positioning the piston rod 21 in the second chamber 12, it is convenient to pass the power supply harness 535 of the solenoid valve 5 through the piston rod 21.

[0077] Optionally, the damping force of the first damping valve 3 is less than the damping force of the second damping valve 4.

[0078] It should be noted that when the solenoid valve 5 is at its maximum opening, most of the fluid flowing between the first chamber 11 and the second chamber 12 flows through the first damping valve 3. At this time, the damping force of the variable damping force damper is at its minimum. The relationship between the damping force of the variable damping force damper and the fluid velocity is as follows: Figure 3 The solid line in the diagram is denoted as the comfort curve.

[0079] When solenoid valve 5 is fully closed, all fluid flowing between the first chamber 11 and the second chamber 12 flows through the second damping valve 4, and no fluid flows through the first damping valve 3. At this time, the damping force of the variable damping force damper is at its maximum. The relationship between the damping force of the variable damping force damper and the fluid velocity is as follows: Figure 3 The dashed line in the figure is shown and denoted as the motion curve.

[0080] When the current of solenoid valve 5 is adjusted so that its opening degree is between fully closed and maximum opening, the damping force of the variable damping force damper is relatively moderate, and the variation range of the damping force of the variable damping force damper is within a certain range. Figure 3 Between the dashed and solid lines in the diagram, the damping force of the variable damping force damper can be adjusted by regulating the current of the solenoid valve 5. By making the damping force of the first damping valve 3 less than the damping force of the second damping valve 4, the damping force adjustment range of the variable damping force damper can be expanded.

[0081] Optionally, such as Figure 2 , Figures 5 to 8 As shown, the first damping valve core 32 includes a first core body 321, a first valve plate group 322, and a second valve plate group 323. The first core body 321 is located between the first sub-cavity 3111 and the second sub-cavity 3112. The first core body 321 has a first valve hole 3211 and a second valve hole 3212 that are isolated from each other. The two ends of the first valve hole 3211 are located in the first sub-cavity 3111 and the second sub-cavity 3112, respectively. The two ends of the second valve hole 3212 are located in the first sub-cavity 3111 and the second sub-cavity 3112, respectively. The first valve plate group 322 covers the end of the first valve hole 3211 located in the second sub-cavity 3112. The second valve plate group 323 covers the end of the second valve hole 3212 located in the first sub-cavity 3111.

[0082] When fluid flows into the first valve hole 3211 from the first compartment 3111, the first valve plate assembly 322 can undergo elastic deformation under the force of the fluid, thereby allowing the fluid to enter the second compartment 3112 through the first valve hole 3211. When the force of the fluid decreases or disappears (i.e., the pressure of the fluid decreases), the first valve plate assembly 322 can also automatically reset to close the end of the first valve hole 3211 located in the second compartment 3112. At this time, the fluid can no longer enter the second compartment 3112 through the first valve hole 3211.

[0083] When fluid flows into the second valve hole 3212 in the second compartment 3112, the second valve plate assembly 323 can undergo elastic deformation under the force of the fluid, thereby allowing the fluid to enter the first compartment 3111 through the second valve hole 3212; when the force of the fluid decreases or disappears (i.e. the pressure of the fluid decreases), the second valve plate assembly 323 can also automatically reset to close the end of the second valve hole 3212 located in the first compartment 3111. At this time, the fluid can no longer enter the first compartment 3111 through the second valve hole 3212.

[0084] By using different models of the first valve plate group 322 and the second valve plate group 323, the model of the first damping valve core 32 can be changed, reducing the cost of replacement.

[0085] Optionally, such as Figure 2 , Figure 9 and Figure 10 As shown, the second damping valve core 42 includes a second core 421, a third valve plate group 422, and a fourth valve plate group 423. The second core 421 is located between the third sub-cavity 4111 and the fourth sub-cavity 4112. The second core 421 has a third valve hole 4211 and a fourth valve hole 4212 that are isolated from each other. The two ends of the third valve hole 4211 are located in the third sub-cavity 4111 and the fourth sub-cavity 4112, respectively. The two ends of the fourth valve hole 4212 are located in the third sub-cavity 4111 and the fourth sub-cavity 4112, respectively. The third valve plate group 422 covers the end of the third valve hole 4211 located in the fourth sub-cavity 4112. The fourth valve plate group 423 covers the end of the fourth valve hole 4212 located in the third sub-cavity 4111.

[0086] When fluid flows into the third valve hole 4211 from the third compartment 4111, the third valve plate assembly 422 can undergo elastic deformation under the force of the fluid, thereby allowing the fluid to enter the fourth compartment 4112 through the third valve hole 4211. When the force of the fluid decreases or disappears (i.e., the pressure of the fluid decreases), the third valve plate assembly 422 can also automatically reset to close the end of the third valve hole 4211 located in the fourth compartment 4112. At this time, the fluid can no longer enter the fourth compartment 4112 through the third valve hole 4211.

[0087] When fluid flows into the fourth valve hole 4212 in the fourth compartment 4112, the fourth valve plate assembly 423 can undergo elastic deformation under the force of the fluid, thereby allowing the fluid to enter the third compartment 4111 through the fourth valve hole 4212; when the force of the fluid decreases or disappears (i.e. the pressure of the fluid decreases), the fourth valve plate assembly 423 can also automatically reset to close the end of the fourth valve hole 4212 located in the third compartment 4111. At this time, the fluid can no longer enter the third compartment 4111 through the fourth valve hole 4212.

[0088] By using different models of the third valve plate group 422 and the fourth valve plate group 423, the model of the second damping valve core 42 can be changed, reducing the replacement cost.

[0089] Specifically, the elastic force of the first valve plate group 322 is less than that of the third valve plate group 422, and the elastic force of the second valve plate group 323 is less than that of the fourth valve plate group 423. This makes the damping force of the first damping valve 3 less than that of the second damping valve 4, so that the fluid can pass through the first damping valve 3 more easily and not easily through the second damping valve 4.

[0090] The variable damping force vibration damper of this embodiment can adjust the trend of the comfort curve and motion curve in the figure by using different models of the first valve plate group 322, the second valve plate group 323, the third valve plate group 422 and the fourth valve plate group 423.

[0091] When the solenoid valve 5 is at its maximum opening, the comfort curve is largely determined by the adjustment and tuning of the first valve group 322 and the second valve group 323. When the solenoid valve 5 is at a smaller opening or closed, the motion curve is largely determined by the adjustment and tuning of the third valve group 422 and the fourth valve group 423. In other words, the variable damping force vibration damper of this embodiment can achieve separate tuning of the comfort curve and the motion curve, and the tuning of the comfort curve and the motion curve can also be decoupled.

[0092] It should be noted that the installation methods and working principles of the first valve plate group 322, the second valve plate group 323, the third valve plate group 422, and the fourth valve plate group 423 are existing technologies and will not be described in detail here.

[0093] Optionally, the first valve plate group 322 includes at least one first elastic valve plate 52. That is, the number of first elastic valve plates 52 can be set to one, two, three, or even more, which is not limited here. By using first elastic valve plates 52 of different thicknesses, the elasticity of the first valve plate group 322 can be adjusted, thereby adjusting the damping force of the first damping valve 3.

[0094] Optionally, the second valve assembly 323 includes at least one second elastic valve plate 52. That is, the number of second elastic valve plates 52 can be set to one, two, three, or even more, without limitation. By using second elastic valve plates 52 of different thicknesses, the elasticity of the second valve assembly 323 can be adjusted, thereby regulating the damping force of the first damping valve 3.

[0095] Optionally, one, two, three, or even more first valve holes 3211 may be provided, without limitation. When multiple first valve holes 3211 are provided, the multiple first valve holes 3211 are arranged at intervals along the circumference of the first core 321. Optionally, by changing the diameter of the first valve holes 3211, the damping force of the first damping valve 3 can also be adjusted.

[0096] Optionally, one, two, three, or even more second valve holes 3212 may be provided, without limitation. When multiple second valve holes 3212 are provided, they are spaced apart circumferentially along the second core 421. Optionally, by changing the diameter of the second valve holes 3212, the damping force of the first damping valve 3 can also be adjusted.

[0097] For example, the first core 321 is provided with a first boss 3213 and a second boss 3214 both located in the first cavity 3111. The first boss 3213 surrounds the outside of the first valve hole 3211, and the second boss 3214 surrounds the outside of the first boss 3213. Along the radial direction of the cylinder 1, the second valve hole 3212 is located between the first boss 3213 and the second boss 3214. The first boss 3213 and the second boss 3214 both abut against the second valve plate assembly 323, thereby sealing the end of the second valve hole 3212 located in the first cavity 3111 through the second valve plate assembly 323.

[0098] Furthermore, the first core 321 is also provided with a third protrusion 3215 located in the second cavity 3112. The third protrusion 3215 surrounds the outside of the first valve hole 3211, and the first valve hole 3211 and the second valve hole 3212 are respectively located on both sides of the third protrusion 3215 along the radial direction of the cylinder 1. The first valve plate assembly 322 abuts against the third protrusion 3215, thereby sealing one end of the first valve hole 3211 located in the second cavity 3112 through the first valve plate assembly 322.

[0099] Optionally, the third valve assembly 422 includes at least one third elastic valve piece 52. That is, the number of third elastic valve pieces 52 can be set to one, two, three, or even more, without limitation. By using third elastic valve pieces 52 of different thicknesses and numbers, the elasticity of the third valve assembly 422 can be adjusted, thereby regulating the damping force of the second damping valve 4.

[0100] Optionally, the fourth valve assembly 423 includes at least one fourth elastic valve plate 52. That is, the number of fourth elastic valve plates 52 can be set to one, two, three, or even more, without limitation. By using fourth elastic valve plates 52 of different thicknesses and numbers, the elastic force of the fourth valve assembly 423 can be adjusted, thereby regulating the damping force of the second damping valve 4.

[0101] Optionally, one, two, three, or even more third valve holes 4211 may be provided, without limitation. When multiple third valve holes 4211 are provided, they are spaced apart circumferentially along the second core 421. Optionally, by changing the diameter of the third valve holes 4211, the damping force of the second damping valve 4 can also be adjusted.

[0102] Optionally, one, two, three, or even more fourth valve holes 4212 may be provided, without limitation. When multiple fourth valve holes 4212 are provided, they are spaced apart circumferentially along the second core 421. Optionally, by changing the diameter of the fourth valve holes 4212, the damping force of the second damping valve 4 can also be adjusted.

[0103] For example, the second core 421 is provided with a fourth boss 4213 and a fifth boss 4214, both located in the third cavity 4111. The fourth boss 4213 surrounds the outside of the third valve hole 4211, and the fifth boss 4214 surrounds the outside of the fifth boss 4214. Along the radial direction of the cylinder 1, the fourth valve hole 4212 is located between the fourth boss 4213 and the fifth boss 4214. The fourth boss 4213 and the fifth boss 4214 are both abutted against the fourth valve plate assembly 423, thereby sealing the end of the fourth valve hole 4212 located in the third cavity 4111 through the fourth valve plate assembly 423.

[0104] Furthermore, the second core 421 is also provided with a sixth protrusion 4215 located in the fourth sub-cavity 4112. The sixth protrusion 4215 surrounds the outside of the third valve hole 4211, and the third valve hole 4211 and the fourth valve hole 4212 are respectively located on both sides of the sixth protrusion 4215 along the radial direction of the cylinder 1. The third valve plate assembly 422 abuts against the sixth protrusion 4215, thereby sealing one end of the third valve hole 4211 located in the fourth sub-cavity 4112 through the third valve plate assembly 422.

[0105] Optionally, the piston body 2 includes a piston body 2a and a valve sleeve 2b. The valve sleeve 2b is located in the second cavity 12 and is fixedly connected to the piston body 2a. An inner cavity is formed between the valve sleeve 2b and the piston body 2. The second valve port 23 is opened in the valve sleeve 2b, and the first valve port 22 is opened in the piston body 2a, which facilitates processing and assembly.

[0106] Optionally, a gap 2b1 is provided between the outer peripheral wall of the valve sleeve 2b and the inner peripheral wall of the cylinder 1. The second valve port 23 communicates with the second chamber 12 through the gap 2b1, which helps to improve the smoothness of piston movement and improve the vibration reduction effect of the variable damping force damper. It should be noted that the gap 2b1 is an annular structure surrounding the outer periphery of the valve sleeve 2b.

[0107] Optionally, such as Figures 12 to 14As shown, the solenoid valve 5 includes a third valve body 51, a valve plate 52, and an electromagnetic drive assembly 53. The third valve body 51 is fixed in the inner cavity and has a third valve chamber. The valve plate 52 is disposed in the third valve chamber and divides the third valve chamber into a fifth sub-chamber 511 and a sixth sub-chamber 512. The fifth sub-chamber 511 is connected to the second valve port 23, and the sixth sub-chamber 512 is connected to the first sub-chamber 3111. The valve plate 52 has an adjusting valve hole 521 for connecting the fifth sub-chamber 511 and the sixth sub-chamber 512. The electromagnetic drive assembly 53 is connected to the valve plate 52 and can drive the valve plate 52 to move in order to adjust the effective flow area of ​​the adjusting valve hole 521.

[0108] Specifically, the two ends of the valve plate 52 are respectively inserted into the inner walls of the opposite sides of the third valve chamber. The valve plate 52 is driven to move by the electromagnetic drive assembly 53, which can change the position of the regulating valve orifice 521. When part of the regulating valve orifice 521 is blocked by the cavity wall of the third valve chamber, the effective flow area of ​​the regulating valve orifice 521 is reduced. When the regulating valve orifice 521 is completely blocked by the cavity wall of the third valve chamber, the effective flow area of ​​the regulating valve orifice 521 is zero, that is, the solenoid valve 5 is in the closed state. When the regulating valve orifice 521 is not blocked by the cavity wall of the third valve chamber, the effective flow area of ​​the regulating valve orifice 521 is maximized.

[0109] The valve plate 52 is moved by the electromagnetic drive component 53, thereby adjusting the effective flow area of ​​the regulating valve orifice 521. The structure is simple, occupies little space, is easy to assemble, and reduces the volume of the vibration damper.

[0110] Optionally, such as Figure 2 As shown, the electromagnetic drive assembly 53 includes a moving armature 531, a magnetic sleeve 532, an elastic element 533, and an electromagnetic coil assembly 534. The moving armature 531 is movably disposed inside the magnetic sleeve 532 and is connected to the valve plate 52. The elastic element 533 is connected between the moving armature 531 and the magnetic sleeve 532. The electromagnetic coil assembly 534 is sleeved on the outside of the magnetic sleeve 532, and the power supply harness 535 of the electromagnetic coil assembly 534 passes through the piston rod 21 of the piston body 2, thereby facilitating the connection between the electromagnetic drive assembly 53 and the valve plate 52.

[0111] Specifically, the third valve chamber has an L-shaped structure, meaning it includes a radial cavity 513 and an axial cavity 514 communicating with the radial cavity 513. Furthermore, the third valve body 51 also includes a mounting hole 515. One end of the valve plate 52 is fixedly connected to the moving armature 531, and the other end passes through the mounting hole 515 and is located within the radial cavity 513. The moving armature 531 can drive the valve plate 52 to move axially along the cylinder 1, thereby facilitating the overall layout of the solenoid valve 5 and reducing the volume of the variable damping force vibration damper.

[0112] Optionally, the first chamber 3111 is provided with a first opening, and the third valve body 51 is covered by the first opening. This not only ensures the sealing performance of the solenoid valve 5 and the first damping valve 3, but also facilitates assembly and reduces the volume occupied by the solenoid valve 5 and the first damping valve 3.

[0113] Optionally, the second compartment 3112 has a second opening, and a connecting valve body 6 is provided between the first valve body 31 and the second valve body 41. The connecting valve body 6 covers the second opening and includes a connecting valve cavity 61, which communicates with the second compartment 3112 and the second valve cavity D412 respectively. This not only ensures the sealing performance of the first damping valve 3 and the second damping valve 4, but also facilitates assembly and reduces the volume occupied by the first damping valve 3 and the second damping valve 4.

[0114] Optionally, the outer peripheral wall of the third valve body 51 is provided with a first missing portion, and a third cavity is formed between the inner wall of the first missing portion and the inner wall of the inner cavity. The fifth sub-cavity 511 is connected to the second valve port 23 through the third cavity, thereby buffering the fluid through the third cavity, improving the smoothness of fluid flow, and improving the vibration reduction effect. For example, the first missing portion is a first notch. As an alternative, the first missing portion can also be a first groove.

[0115] Optionally, the outer peripheral wall of the first valve body 31 is provided with a second notch, and the inner wall of the second notch and the inner wall of the inner cavity form a first valve cavity B312. One end of the first valve cavity B312 communicates with a third cavity. The outer peripheral wall of the connecting valve body 6 is provided with a third notch, and the inner wall of the third notch and the inner wall of the inner cavity form a fourth cavity. The other end of the first valve cavity B312 communicates with the third sub-cavity 4111 through the fourth cavity. This not only facilitates the processing of the first valve cavity B312 and the assembly of the first damping valve 3 and the second damping valve 4, but also helps to reduce the weight of the first valve body 31 and the connecting valve body 6, achieving lightweighting. Exemplarily, the second notch is a second notch. As an alternative, the second notch can also be a second groove. Exemplarily, the third notch is a third notch. As an alternative, the third notch can also be a third groove.

[0116] For example, such as Figure 15 As shown, the working principle of the variable damping force vibration damper in this embodiment is as follows:

[0117] When the variable damping force vibration damper returns to its restoring stroke, the fluid pressure in the second chamber 12 increases. The fluid enters the second valve port 23 through the gap 2b1 between the valve sleeve 2b and the cylinder 1, and then flows into the third chamber. A portion of the fluid in the third chamber enters the fifth sub-chamber 511, and then enters the sixth sub-chamber 512 through the regulating valve hole 521 of the valve plate 52. Then it enters the first valve hole 3211 through the first sub-chamber 3111. Under the pressure of the fluid, the first valve plate group 322 undergoes elastic deformation and opens, allowing the fluid to enter the second sub-chamber 3112 through the first valve hole 3211, and then enters the first valve port 22 through the connecting valve chamber 61 and the second valve chamber D412 in sequence, finally flowing into the first chamber 11.

[0118] Another portion of the fluid in the third chamber enters the first valve chamber B312, then enters the third sub-chamber 4111 through the fourth chamber, and then enters the third valve port 4211 through the third sub-chamber 4111. Under the pressure of the fluid, the third valve plate group 422 undergoes elastic deformation and opens, allowing the fluid to enter the fourth sub-chamber 4112 through the third valve port 4211, and finally flows into the first chamber 11 through the first valve port 3211.

[0119] When the variable damping force vibration damper is in the compression stroke, the fluid pressure in the first chamber 11 increases. The flow path of the fluid from the first chamber 11 to the second chamber 12 is opposite to the flow path during the recovery stroke. The difference is that the fluid in the second sub-chamber 3112 enters the second valve hole 3212, and then pushes open the second valve plate group 323 to enter the first sub-chamber 3111; the fluid in the fourth sub-chamber 4112 enters the fourth valve hole 4212, and then pushes open the fourth valve plate group 423 to enter the third sub-chamber 4111.

[0120] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A variable-damping force shock absorber characterized by, include: cylindrical body; A piston body is slidably disposed in the cavity of the cylinder along the axial direction of the cylinder body, the piston body dividing the cylinder body into a first cavity and a second cavity that are not connected to each other, and the piston rod of the piston body is located in the first cavity or the second cavity; the piston body includes an inner cavity, a first valve port and a second valve port, the first valve port communicating with the first cavity and the second valve port communicating with the second cavity; The first damping valve includes a first valve body and a first damping valve core. The first valve body is fixed in the inner cavity and includes a first valve cavity A and a first valve cavity B that are isolated from each other. The first damping valve core is disposed in the first valve cavity A and divides the first valve cavity A into a first sub-cavity and a second sub-cavity. The first valve cavity B is in communication with the second valve port. The second damping valve includes a second valve body and a second damping valve core. The second valve body is fixedly disposed within the inner cavity and includes a second chamber C and a second chamber D that are isolated from each other. The second damping valve core is disposed within the second valve chamber C and divides the second valve chamber C into a third sub-chamber and a fourth sub-chamber. The third sub-chamber communicates with the first valve chamber B, and the fourth sub-chamber communicates with the first valve port. The second valve chamber D communicates with both the second sub-chamber and the first valve port. The solenoid valve has one end port connected to the second valve port and the other end port connected to the first compartment. The opening degree of the solenoid valve is adjustable, and the power supply harness of the solenoid valve passes through the piston rod.

2. The variable-damping force shock absorber according to claim 1, characterized by, The piston rod is located in the second chamber; the damping force of the first damping valve is less than the damping force of the second damping valve.

3. The variable-damping force shock absorber according to claim 1, characterized by, The first damping valve core includes: A first core is disposed between the first sub-cavity and the second sub-cavity. The first core is provided with a first valve hole and a second valve hole that are isolated from each other. The two ends of the first valve hole are respectively located in the first sub-cavity and the second sub-cavity, and the two ends of the second valve hole are respectively located in the first sub-cavity and the second sub-cavity. The first valve plate group is disposed at one end of the first valve hole located in the second compartment. The second valve plate assembly is disposed at one end of the second valve hole located within the first compartment. And / or, the second damping valve core includes: The second core is located between the third and fourth sub-cavities. The second core is provided with a third valve hole and a fourth valve hole that are isolated from each other. The two ends of the third valve hole are located in the third and fourth sub-cavities, respectively. The two ends of the fourth valve hole are located in the third and fourth sub-cavities, respectively. The third valve plate group is disposed at one end of the third valve hole located in the fourth sub-cavity; The fourth valve plate group is disposed at one end of the fourth valve hole located within the third sub-cavity.

4. The variable-damping force shock absorber according to claim 1, characterized by, The piston body includes a piston body and a valve sleeve. The valve sleeve is disposed in the second cavity and fixedly connected to the piston body. The inner cavity is formed between the valve sleeve and the piston body. The second valve port is opened in the valve sleeve, and the first valve port is opened in the piston body.

5. The variable-damping force shock absorber according to claim 4, characterized by A gap is provided between the outer peripheral wall of the valve sleeve and the inner peripheral wall of the cylinder, and the second valve port communicates with the second cavity through the gap.

6. A variable-damping force shock absorber according to any one of claims 1 to 5, characterized by The solenoid valve includes: The third valve body is fixedly disposed within the inner cavity, and the third valve body is provided with a third valve chamber; A valve plate is disposed in the third valve chamber, which divides the third valve chamber into a fifth sub-chamber and a sixth sub-chamber. The fifth sub-chamber is connected to the second valve port, and the sixth sub-chamber is connected to the first sub-chamber. The valve plate is provided with an adjusting valve hole for connecting the fifth sub-chamber and the sixth sub-chamber. An electromagnetic drive assembly is connected to the valve plate and is capable of driving the valve plate to move in order to adjust the effective flow area of ​​the regulating valve orifice.

7. The variable-damping force shock absorber according to claim 6, characterized by The first compartment is provided with a first opening, and the third valve body is covered by the first opening; And / or, the second sub-cavity is provided with a second opening, and a connecting valve body is provided between the first valve body and the second valve body. The connecting valve body covers the second opening, and the connecting valve body includes a connecting valve cavity, which is connected to the second sub-cavity and the second valve cavity D respectively.

8. The variable-damping force shock absorber according to claim 7, characterized by, The outer peripheral wall of the third valve body is provided with a first missing part, and a third cavity is formed between the inner wall of the first missing part and the inner wall of the inner cavity. The fifth sub-cavity is connected to the second valve port through the third cavity.

9. The variable-damping force shock absorber according to claim 8, characterized by, The outer peripheral wall of the first valve body is provided with a second missing part, and the inner wall of the second missing part and the inner wall of the inner cavity form the first valve cavity B. One end of the first valve cavity B is connected to the third cavity. The outer peripheral wall of the connecting valve body is provided with a third missing part, and a fourth cavity is formed between the inner wall of the third missing part and the inner wall of the inner cavity. The other end of the first valve cavity B is connected to the third sub-cavity through the fourth cavity.

10. The variable-damping force shock absorber according to claim 6, characterized by, The electromagnetic drive assembly includes: A movable armature and a magnetic sleeve, wherein the movable armature is movably disposed within the magnetic sleeve and the movable armature is connected to the valve plate; An elastic element is connected between the moving armature and the magnetic sleeve; An electromagnetic coil assembly is sleeved on the outside of the magnetic sleeve, and the power supply harness of the electromagnetic coil assembly passes through the piston rod of the piston body.

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