Quick response stiffness valve

Abstract

The invention belongs to the technical field of vehicle suspension systems, and particularly relates to a quick-response stiffness valve which comprises a fixed seat, a valve rod, a spring and a spring. The communicating seat is mounted at one end of the fixed seat and is provided with a communicating channel; the plunger is arranged in the sliding cavity in a sliding manner and is configured to open or close the communication channel; the movable sealing component is installed between the fixing base and the plunger, in the moving process of the plunger, the movable sealing component at least has a first compression amount, a second compression amount and a third compression amount in sequence, the first compression amount is zero and is equal to the compression amount of the movable sealing component when the plunger starts to move towards the communicating base, and the third compression amount is equal to the second compression amount. The third compression amount is equal to the compression amount of the movable sealing component when the plunger seals the communicating channel, the second compression amount is larger than or equal to the first compression amount and smaller than the third compression amount, and the moving distance of the plunger when the movable sealing component is in the second compression amount is larger than the moving distance of the plunger when the movable sealing component is in the third compression amount. According to the stiffness valve, resistance overcome during closing operation is small, and response time can be shortened.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle suspension systems, and in particular relates to a fast-response stiffness valve. Background Art

[0002] The dual-chamber air suspension system provides adjustable suspension stiffness. A stiffness regulating valve is provided in the system. When the stiffness regulating valve is not energized, the two gas chambers of the air spring are connected, and the suspension system provides low stiffness. When the stiffness regulating valve is energized, the two gas chambers of the air spring are separated, and the suspension system provides high stiffness. It is necessary to ensure that the two gas chambers are well sealed.

[0003] The current technical solution is to provide a dynamic sealing part to seal the sliding plunger. The sliding plunger adopts a cylindrical design with equal diameter. This design has the following disadvantages: In order to ensure a good seal, the sealing lip of the dynamic sealing part must have a certain amount of compression. If the dynamic seal works under sliding friction conditions with a large amount of compression for a long time, it will wear quickly, which is not conducive to the sealing performance of the valve body throughout its life cycle; the dynamic sealing part has a large starting resistance, slow response speed, and higher energy consumption. Summary of the Invention

[0004] In order to solve the technical problem in the prior art that the stiffness valve has a large starting resistance when performing a closing operation, which is not conducive to a quick response, the present application provides a quick response stiffness valve.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is a fast response stiffness valve, comprising A fixed seat, in which a sliding cavity is provided; A connecting seat is installed at one end of the fixing seat and is provided with a connecting passage for connecting with the air spring cavity; a plunger, slidably disposed in the sliding cavity and configured to open or close the communication channel; A dynamic sealing component is installed between the fixed seat and the plunger. During the movement of the plunger, the dynamic sealing component has at least a first compression amount, a second compression amount and a third compression amount in sequence, wherein the first compression amount is 0 and is equal to the compression amount of the dynamic sealing component when the plunger starts to move toward the connecting seat, the third compression amount is equal to the compression amount of the dynamic sealing component when the plunger closes the connecting channel, and the second compression amount is greater than or equal to the first compression amount and less than the third compression amount.

[0006] In some embodiments, the distance the plunger moves when the dynamic sealing component is in the second compression amount is greater than the distance the plunger moves when the dynamic sealing component is in the third compression amount.

[0007] In some embodiments, the dynamic sealing component has at least one sealing lip, and the surface of the plunger corresponding to the dynamic sealing component is provided with at least two segments of different diameters. During the movement of the plunger, the plunger surface has at least two segments of different diameters corresponding to each of the sealing lips.

[0008] In some embodiments, the dynamic sealing component has a sealing lip, and the surfaces of the plunger corresponding to the dynamic sealing component are provided with at least two sections with different diameters.

[0009] In some embodiments, the dynamic sealing component has two sealing lips, and the surface of the plunger corresponding to the dynamic sealing component is provided with a first diameter section, a second diameter section, a third diameter section, and a fourth diameter section in a direction from the connecting seat to the fixed seat, wherein the diameter of the first diameter section is smaller than the diameter of the second diameter section, and the diameter of the third diameter section is smaller than the diameter of the fourth diameter section; When the plunger starts to move toward the connecting seat, one of the sealing lips corresponds to the first diameter section, and the other sealing lip corresponds to the third diameter section; when the plunger closes the connecting channel, the two sealing lips correspond to the second diameter section and the fourth diameter section respectively.

[0010] In some embodiments, when the dynamic sealing component is in the second compression amount, one of the sealing lips corresponds to the first diameter section, and the other corresponds to the third diameter section.

[0011] In some embodiments, when the dynamic sealing component is in the second compression amount, over at least part of the stroke of the plunger, one sealing lip corresponds to the second diameter segment or the fourth diameter segment, and the other sealing lip corresponds to the first diameter segment or the third diameter segment.

[0012] In some embodiments, the first diameter segment and the third diameter segment are both equal diameter segments.

[0013] In some embodiments, the diameters of the first diameter section and the third diameter section gradually increase from the connecting seat to the fixed seat.

[0014] In some embodiments, a sealing boss corresponding to the position of the plunger is provided on the connecting seat, the connecting channel passes through the sealing boss, and a wave spring is provided on the end face of the sealing boss close to the plunger; when the wave spring is flattened between the plunger and the sealing boss, the connecting channel is in a closed state.

[0015] In some embodiments, a plurality of limit blocks protruding from the end face of the sealing boss are provided on the outside, the wave spring is provided between the plurality of limit blocks, and a plurality of guide blocks are provided on the outside of the plunger, and the position of the guide blocks corresponds to the gap position between two adjacent limit blocks.

[0016] In some embodiments, when the communication channel is in an open state, the protrusion of the wave spring contacts the plunger.

[0017] In some embodiments, a first sealing gasket is provided between the end surface of the sealing boss and the wave spring, and a second sealing gasket is provided on the end surface of the plunger.

[0018] Beneficial effects: When the rigidity valve of the present invention starts to perform a closing operation, the compression between the dynamic sealing component and the plunger is minimal and is 0, and there is no need to overcome the friction resistance of the dynamic sealing component on the plunger, and there is no static friction, which is beneficial to improving the response speed of the plunger when performing a closing operation. At the same time, when the dynamic sealing component is at the second compression amount, the friction resistance to the plunger is small, and the plunger movement stroke is long, which is beneficial to the plunger moving at a faster speed and reducing the response time of the rigidity valve. The dynamic sealing component of the stiffness valve of the present invention is not always in a state of large compression, so the wear is relatively slowed down, which increases the service life of the dynamic sealing component and is beneficial to the sealing performance of the valve body throughout its entire life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the stiffness valve structure in one embodiment; Figure 2 for Figure 1 Schematic diagram of the structure of the medium-rigidity valve plunger cooperating with the dynamic seal component during movement, where (a), (b), and (c) are schematic diagrams of the structure of the dynamic seal component when it is in the first compression amount, the second compression amount, and the third compression amount, respectively; Figure 3 A schematic diagram of a stiffness valve structure in which the dynamic sealing component has a sealing lip and the plunger has three sections with different diameters; Figure 4 for Figure 3 Schematic diagram of the structure of the medium-rigidity valve plunger cooperating with the dynamic seal component during movement, where (a), (b), and (c) are schematic diagrams of the structure of the dynamic seal component when it is in the first compression amount, the second compression amount, and the third compression amount, respectively; Figure 5 Schematic diagram of a rigid valve structure in which the dynamic sealing portion has two sealing lips and the plunger has four diameter sections; Figure 6 for Figure 5 Schematic diagram of the structure of the medium-rigidity valve plunger cooperating with the dynamic seal component during movement, where (a), (b), and (c) are schematic diagrams of the structure of the dynamic seal component when it is in the first compression amount, the second compression amount, and the third compression amount, respectively; Figure 7 A schematic diagram of another rigidity valve structure in which the dynamic sealing portion has two sealing lips and the plunger has four diameter sections; Figure 8 for Figure 7 Schematic diagram of the structure of the medium-rigidity valve plunger cooperating with the dynamic seal component during movement, where (a), (b), and (c) are schematic diagrams of the structure of the dynamic seal component when it is in the first compression amount, the second compression amount, and the third compression amount, respectively; Figure 9 Schematic diagram of a stiffness valve structure in which the diameters of the first diameter section and the third diameter section gradually increase in another embodiment; Figure 10 for Figure 9 Schematic diagram of the structure of the medium-rigidity valve plunger cooperating with the dynamic seal component during movement, where (a), (b), and (c) are schematic diagrams of the structure of the dynamic seal component when it is in the first compression amount, the second compression amount, and the third compression amount, respectively; Figure 11 Schematic diagram of the stiffness valve structure with a wave spring.

[0020] In the figure, 1. fixed seat, 2. connecting seat, 21. connecting channel, 22. first sealing gasket, 23. limit block, 3. plunger, 31. second sealing gasket, 32. guide block, 33. smaller diameter section, 34. larger diameter section, 35. minimum diameter section, 36. medium diameter section, 37. maximum diameter section, 38. first diameter section, 39. second diameter section, 310. third diameter section, 311. fourth diameter section, 4. dynamic sealing component, 5. wave spring. DETAILED DESCRIPTION

[0021] The present application will be further described below in conjunction with specific embodiments. Obviously, the embodiments described are only a portion of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative changes are within the scope of protection of the present application.

[0022] The stiffness valve is electromagnetically driven, meaning that a coil assembly drives the movement of the iron core, which in turn drives the movement of the plunger 3, thereby closing or opening the connecting channel 21 on the connecting seat 2, thereby isolating or connecting the main chamber and the auxiliary chamber of the vehicle suspension system air spring. Currently, the contact surface between the plunger 3 and the dynamic sealing component 4 is a surface of equal diameter. During the movement of the plunger 3, the compression of the dynamic sealing component 4 remains unchanged. In particular, when the coil assembly is powered on and started, the plunger 3 needs to overcome the large static friction to move. The frictional resistance during the movement of the plunger 3 toward the connecting seat 2 is also large, resulting in a slow response speed. Reducing the compression of the dynamic sealing component 4 will affect the sealing effect and the sealing performance of the stiffness valve.

[0023] The rigid valve device used in the present invention not only ensures sealing performance but also has the performance of rapid response. In the present invention, the compression amount of the dynamic sealing component 4 changes during the movement of the plunger 3. In the initial state of the plunger 3, that is, the connecting channel 21 of the connecting seat 2 is in an open state, the plunger 3 is located at the position with the largest distance from the connecting seat 2, and the compression amount of the dynamic sealing component 4 is the smallest, which is 0, that is, the first compression amount is 0. When the coil assembly is energized, the plunger 3 does not need to overcome the static friction of the dynamic sealing component 4 to start, and the starting response speed is greatly increased. In the final state of the plunger 3, that is, the plunger 3 is in contact with the connecting seat 2, and the connecting channel 21 for connecting the main chamber and the sub-chamber of the air spring is sealed and closed, the compression amount of the dynamic sealing component 4 is the largest, that is, the third compression amount, to ensure the sealing effect. During the movement of the plunger 3 from the initial state to the final state, the dynamic sealing component 4 has at least a first compression amount, a second compression amount, and a third compression amount in sequence. The first compression amount is equal to the compression amount of the dynamic sealing component 4 when the plunger 3 is in the initial state, which is 0. The third compression amount is equal to the compression amount of the dynamic sealing component 4 when the plunger 3 is in the final state. The second compression amount is greater than or equal to the first compression amount and less than the third compression amount. When the dynamic sealing component 4 is in the second compression amount, the distance moved by the plunger 3 is greater than the distance moved by the plunger 3 when the dynamic sealing component 4 is in the third compression amount. As a result, when the dynamic sealing component 4 is in the second compression amount, the plunger 3 will not be subjected to or will only be subjected to a small non-static friction resistance. When the dynamic sealing component 4 is in the second compression amount, the stroke of the plunger 3 is long, and thus the plunger 3 can achieve a faster movement speed. When the compression amount of the dynamic sealing component 4 becomes the third compression amount, the compression amount of the dynamic sealing component 4 reaches the maximum. At this time, the frictional resistance to the plunger 3 reaches the maximum, which can ensure the sealing effect. That is to say, compared with the technical solution in the prior art in which the compression amount of the dynamic sealing component 4 is always kept at the maximum state, the technical solution of the present invention not only increases the response speed of the plunger 3 during startup, but also makes the movement speed of the plunger 3 faster, thereby improving the response speed of the stiffness valve as a whole, and also ensuring the sealing of the plunger 3 when it is in the final state.

[0024] The stiffness valve structure provided in some embodiments of the present invention is as follows Figure 1 、 Figure 3 、 Figure 5 、 Figure 7 and Figure 9 As shown, it includes a fixed seat 1 provided with a sliding cavity and a connecting seat 2 installed at one end of the fixed seat 1, and the connecting seat 2 is provided with a connecting channel 21 for connecting the main cavity and the auxiliary cavity of the air spring; The plunger 3 is slidably arranged in the sliding cavity, and moves up and down in the sliding cavity to open or close the connecting channel 21 to adjust the stiffness of the air spring; the dynamic sealing component 4 is arranged between the fixed seat 1 and the plunger 3, and is fixed in the sliding cavity of the fixed seat 1.

[0025] In some embodiments, the dynamic sealing component 4 has at least one sealing lip. The surface of the plunger 3 corresponding to the dynamic sealing component 4 is provided with at least two sections of different diameters. During the movement of the plunger 3, at least two sections of different diameters on the plunger 3 surface correspond to each of the sealing lips. By utilizing the different diameter sections of the plunger 3 having different diameters to cooperate with the sealing lip of the dynamic sealing component 4, and further during the movement of the plunger 3, the different diameter sections cooperate with the sealing lip of the dynamic sealing component 4, thereby achieving different compression amounts for the dynamic sealing component 4.

[0026] like Figure 1 and 2 As shown, in some embodiments, the dynamic sealing component 4 is provided with a sealing lip, and two sections of different diameters are provided on the surfaces corresponding to the plunger 3 and the dynamic sealing component 4, wherein the section close to the connecting seat 2 has a smaller diameter, namely the smaller diameter section 33, and the section away from the connecting seat 2 has a larger diameter, namely the larger diameter section 34. The diameter of the smaller diameter section 33 is smaller than the inner diameter of the sealing lip, and the diameter of the larger diameter section 34 is larger than the inner diameter of the sealing lip. The distance that the dynamic sealing component 4 moves relative to the plunger 3 in the smaller diameter section 33 is greater than 1 / 2 of the moving stroke of the plunger 3. When the plunger 3 is in the initial state, the sealing lip is located at the smaller diameter section 33. At this time, the compression amount of the sealing lip is 0, that is, the first compression amount of the dynamic sealing component 4 is 0, as shown in FIG. Figure 2 As shown in (a); after the coil assembly is energized, the plunger 3 will not be squeezed and rubbed by the dynamic sealing component 4, there is no static friction, and the response speed is fast. When the sealing lip moves relatively in the smaller diameter section 33, the compression amount of the sealing lip is still 0, that is, the second compression amount of the sealing lip is 0, as shown in FIG. Figure 2 As shown in (b), the plunger 3 is not squeezed or rubbed by the dynamic sealing component 4. During this process, the plunger 3 is not squeezed or rubbed by the dynamic sealing component 4 and can move at a higher speed. When the sealing lip moves relatively to the larger diameter section 34 of the plunger 3, the plunger 3 generates a squeezing force on the sealing lip, and the compression amount of the sealing lip is greater than 0, that is, the third compression amount of the dynamic sealing component 4 is greater than 0, as shown in FIG. Figure 2 As shown in (c), the plunger 3 is squeezed and rubbed by the sealing lip. When the dynamic sealing component 4 corresponds to the smaller diameter section 33 of the plunger 3, the plunger 3 is not squeezed and rubbed by the dynamic sealing component 4, which not only has a fast response speed but also a fast movement speed.

[0027] In the initial state, the communication channel 21 of the communication seat 2 is open, that is, the main chamber and the secondary chamber of the air spring are in a communication state. Since the stiffness valve is installed in the chamber of the air spring, it is not necessary for the dynamic sealing component 4 to have sealing performance at this time. Therefore, even if the compression of the dynamic sealing component 4 is 0 at this time, it will not affect the performance of the stiffness valve. In the final state, the communication channel 21 of the communication seat 2 is closed, that is, the main chamber and the secondary chamber of the air spring are in a sealed state. At this time, the dynamic sealing component 4 has a large third compression, which can effectively ensure the sealing effect.

[0028] In some embodiments, as Figure 3 and 4 As shown, the dynamic sealing component 4 is provided with a sealing lip, and three sections of different diameters are provided on the surface of the plunger 3 corresponding to the dynamic sealing component 4. The diameters increase successively from close to the connecting seat 2 to away from the connecting seat 2, namely the minimum diameter section 35, the medium diameter section 36 and the maximum diameter section 37. The diameter of the minimum diameter section 35 is smaller than the inner diameter of the sealing lip, and the diameters of the medium diameter section 36 and the maximum diameter section 37 are larger than the inner diameter of the sealing lip. The distance that the dynamic sealing component 4 moves relative to the plunger 3 in the medium diameter section 36 is greater than 1 / 2 of the moving stroke of the plunger 3. When the plunger 3 is in the initial state, the sealing lip is in the minimum diameter section 35. At this time, the compression of the sealing lip is 0. After the coil is energized, the plunger 3 will not be affected by the friction resistance of the dynamic sealing component 4, and the response speed is fast. When the sealing lip moves relatively in the minimum diameter section 35, the compression of the sealing lip is still 0, that is, the first compression of the dynamic sealing component 4 is 0, as shown in FIG. Figure 4 (a); when the sealing lip moves relatively to the medium diameter section 36, the sealing lip is squeezed by the plunger 3, and the compression of the sealing lip is greater than 0, that is, the second compression of the dynamic sealing component 4, as shown in FIG. Figure 4 As shown in (b), frictional resistance is generated on the plunger 3, but the second compression amount is small, and the frictional resistance is small. During this process, the plunger 3 can still move at a relatively high speed; when the sealing lip moves relatively to the maximum diameter section 37 of the plunger 3, the sealing lip is squeezed by the plunger 3 to strengthen the compression effect. At this time, the compression amount of the dynamic sealing component 4 is greater than the second compression amount, that is, the third compression amount, as shown in FIG. Figure 4 As shown in (c), the frictional resistance experienced by the plunger 3 increases. During this process, when the coil assembly is activated, the dynamic seal 4 presents no frictional resistance to the plunger 3, resulting in a fast response. While the plunger 3 moves, the frictional resistance of the dynamic seal 4 increases, yet the plunger 3 is still able to move at a relatively high speed. Furthermore, the second compression amount is greater than 0, ensuring that the dynamic seal 4 provides a certain degree of sealing during the movement of the plunger 3. This minimizes the impact of air leakage from the dynamic seal 4 on the air flow between the main and auxiliary chambers of the air spring, and enhances the feedback on the degree of opening of the connecting channel 21 on the connecting seat 2.

[0029] In addition, in some embodiments, a smooth arc transition is adopted between different diameter sections of the plunger 3 to avoid the steps formed at the connection between different diameter sections from cutting the dynamic sealing component 4 and affecting the service life of the dynamic sealing component 4.

[0030] like Figure 5 and 6 As shown, in some embodiments, the dynamic sealing component 4 has two sealing lips, and the surface of the plunger 3 corresponding to the dynamic sealing component 4 is provided with a first diameter section 38, a second diameter section 39, a third diameter section 310 and a fourth diameter section 311 in the direction from the connecting seat 2 to the fixed seat 1. The diameter of the first diameter section 38 is smaller than that of the second diameter section 39, and the diameter of the third diameter section 310 is smaller than that of the fourth diameter section 311. When the plunger 3 starts to move toward the connecting seat 2, one of the sealing lips corresponds to the first diameter section 38, and the other sealing lip corresponds to the third diameter section 310; when the plunger 3 closes the connecting channel 21, the two sealing lips correspond to the second diameter section 39 and the fourth diameter section 311 respectively. In some embodiments, the inner diameters of the two sealing lips are set to be equal, the first diameter section 38 and the third diameter section 310 are set to equal diameter sections, and the diameters of the first diameter section 38 and the third diameter section 310 are equal and not larger than the inner diameter of the sealing lips, the second diameter section 39 and the fourth diameter section 311 are set to equal diameter sections, and the diameters of the two are equal, the distance that one sealing lip moves relative to the plunger 3 in the first diameter section 38 is equal to the distance that the other sealing lip moves relative to the plunger 3 in the third diameter section 310, the distance that the dynamic sealing part 4 moves relative to the plunger 3 in the first diameter section 38 and the third diameter section 310 is greater than 1 / 2 of the movement stroke of the plunger 3, when the plunger 3 is in the initial state, one sealing lip corresponds to the first diameter section 38, and the other sealing lip corresponds to the third diameter section 310, the friction between the sealing lips and the first diameter section 38 and the third diameter section 310 is 0, and the compression amount of the two sealing lips is 0, that is, the dynamic sealing assembly has a first compression amount, such as Figure 6 As shown in (a), when the coil assembly is energized, the plunger 3 does not need to overcome the static friction of the sealing lip on the plunger 3 and can respond quickly to the start. When the two sealing lips move relative to each other on the first diameter section 38 and the third diameter section 310 respectively, the compression amount of the sealing lips remains 0, that is, the second compression amount of the dynamic sealing component 4 is 0, as shown in FIG. Figure 6 As shown in (b), the plunger 3 is not squeezed or rubbed by the dynamic sealing component 4. During this process, the plunger 3 can move at a higher speed. When the two sealing lips move to the second diameter section 39 and the third diameter section 310 respectively, the two sealing lips contact the second diameter section 39 and the fourth diameter section 311 of the larger diameter part respectively. The sealing lips have a larger compression amount, that is, the dynamic sealing component 4 has a larger third compression amount, as shown in FIG. Figure 6As shown in (c), plunger 3 is squeezed and rubbed by the sealing lip until it reaches its final position. At this point, dynamic sealing component 4 can ensure the sealing effect. The structure of dynamic sealing component 4 with two sealing lips provides a double seal, ensuring the sealing of communication channel 21. Plunger 3 not only has a fast response speed, but also a fast movement speed.

[0031] like Figure 7 and 8 As shown, in some embodiments, the distance that one sealing lip moves relative to the plunger 3 in the first diameter section 38 is set to be unequal to the distance that another sealing lip moves relative to the plunger 3 in the third diameter section 310. Specifically, the distance that one sealing lip moves relative to the plunger 3 in the first diameter section 38 is smaller than the distance that the other sealing lip moves relative to the plunger 3 in the third diameter section 310, and the distance that one sealing lip moves relative to the plunger 3 in the third diameter section 310 is greater than 1 / 2 of the travel of the plunger 3. Figure 8 As shown, in the initial state of the plunger 3, the two sealing lips correspond to the first diameter section 38 and the third diameter section 310 respectively. At this time, the dynamic sealing component 4 has a first compression amount of 0, as shown in FIG. Figure 8 As shown in (a), during the movement of the plunger 3 to the final state, one of the sealing lips first contacts the second diameter section 39 with a larger diameter, and the compression of the sealing lip reaches the maximum, while the other sealing lip still contacts the third diameter section 310 with a smaller diameter, and the compression of the sealing lip is 0. At this time, the dynamic sealing component 4 has a second compression, as shown in FIG. Figure 8 As shown in (b), the friction force of the dynamic seal component 4 on the plunger 3 increases compared to the first compression state, but the plunger 3 can still move at a higher speed. The plunger 3 continues to move, one sealing lip contacts the second diameter section 39 with a larger diameter, and the other sealing lip contacts the fourth diameter section 311 with a larger diameter. The compression of both sealing lips reaches the maximum. At this time, the dynamic seal component 4 has a third compression, as shown in FIG. Figure 8 (c) until the final state is reached. Plunger 3 not only responds quickly but also moves quickly. Simultaneously, a sealing lip of dynamic seal 4 provides a certain degree of sealing during plunger 3's movement, minimizing the impact of air leakage from dynamic seal 4 on the air flow between the main and auxiliary chambers of the air spring. This enhances the feedback sense of the degree of opening of connecting channel 21 on connecting seat 2.

[0032] like Figure 9 and 10As shown, in some other embodiments, unlike the above-mentioned embodiment in which the dynamic sealing component 4 has two sealing lips, the diameters of the first diameter section 38 and the third diameter section 310 both gradually increase in diameter from the connecting seat 2 to the fixed seat 1, and the distance that one sealing lip moves relative to the plunger 3 in the first diameter section 38 is equal to the distance that the other sealing lip moves relative to the plunger 3 in the third diameter section 310. The minimum diameters of the first diameter section 38 and the third diameter section 310 are not greater than the inner diameter of the sealing lips. When the plunger 3 starts to move toward the connecting seat 2, that is, when the plunger 3 is in the initial state, the two sealing lips are located at the minimum diameters of the first diameter section 38 and the second diameter section 39, respectively. When the plunger 3 is in the initial state, the coil assembly is energized, and the compression amount of the sealing lips is 0, that is, the first compression amount of the dynamic sealing component 4 is 0, as shown in FIG. Figure 10 As shown in (a), the friction force exerted on the plunger 3 by the dynamic seal component 4 is zero, and the plunger 3 responds quickly. As the plunger 3 continues to move, the two sealing lips of the dynamic seal component 4 move relative to each other along the first diameter section 38 and the third diameter section 310 respectively. As the diameters of the first diameter section 38 and the third diameter section 310 gradually increase, the compression amount of the two sealing lips of the dynamic seal portion gradually increases, that is, the second compression amount of the dynamic seal component 4 gradually increases as shown in FIG. Figure 10 As shown in (b), at this time, the friction resistance of the plunger 3 against the dynamic seal 4 gradually increases, and the plunger 3 can move at a faster speed during this process. When the two sealing lips contact the second diameter section 39 and the fourth diameter section 311 respectively, the compression of the two sealing lips reaches the maximum, that is, the dynamic seal 4 reaches the third compression, as shown in FIG. Figure 10 (c) until the plunger 3 reaches its final position. This structure provides rapid response and movement of the plunger 3. Furthermore, the sealing lip of the dynamic seal 4 provides a certain degree of sealing during the movement of the plunger 3, minimizing the impact of air leakage from the dynamic seal 4 on the air flow between the main and auxiliary chambers of the air spring. This provides enhanced feedback on the degree of opening of the connecting channel 21 on the connecting seat 2.

[0033] The plunger 3 has a fast startup response and a fast moving speed, and can quickly seal and close the connecting channel 21. However, the sealing end face of the plunger 3 will contact the connecting seat 2 at a relatively fast speed, and the impact force is large. In some of the above-mentioned schemes, the plunger 3 will have a certain movement stroke when the dynamic sealing component 4 is at the maximum third compression amount. On the one hand, it is also to ensure the sealing and improve the response speed while minimizing the speed of the plunger 3 when it contacts the connecting seat 2. However, compared with the rigidity valve in which the existing plunger 3 has a constant diameter and the compression amount of the dynamic sealing component 4 remains unchanged at the maximum, since the resistance encountered by the plunger 3 during movement in the technical solution of the present invention is smaller, the speed is faster, and the impact force of the plunger 3 on the connecting seat 2 is greater, which will cause the rigidity valve to be noisy and have a reduced lifespan. In order to further solve the problems brought about by the above-mentioned schemes, the present invention further provides the following improvement scheme.

[0034] like Figure 11 As shown, in some embodiments, the connecting seat 2 is provided with a sealing boss corresponding to the position of the plunger 3. The middle portion of the sealing boss is a hollow channel, and the connecting channel 21 passes through the sealing boss, that is, the hollow channel is a portion of the connecting channel 21. A wave spring 5 is provided on the end surface of the sealing boss near the plunger 3; when the wave spring 5 is flattened between the plunger 3 and the sealing boss, the connecting channel 21 is in a closed state. The wave spring 5 acts as a buffer for the plunger 3, reducing the impact of the plunger 3 on the connecting seat 2, reducing impact noise, and increasing the service life of the stiffness valve. Moreover, the wave spring 5 can be flattened without affecting the sealing fit between the plunger 3 and the sealing boss. In addition, when the coil assembly is powered off and the plunger 3 is reset by a reset element in the stiffness valve, such as a reset spring, the wave spring 5 also provides a certain reset force.

[0035] To facilitate the positioning and installation of the wave spring 5, in some embodiments, a plurality of stoppers 23 protruding from the end surface of the sealing boss are provided on the outside of the sealing boss. The wave spring 5 is disposed between the plurality of stoppers 23. A plurality of guide blocks 32 are provided on the outside of the plunger 3. The positions of the guide blocks 32 correspond to the gaps between two adjacent stoppers 23. The stoppers 23 limit the radial movement of the wave spring 5 by limiting the position of the wave spring 5. At the same time, a sliding guide structure is formed between the stoppers 23 and the guide blocks 32, guiding the movement of the plunger 3.

[0036] To improve the stability of the wave spring 5 during operation of the stiffness valve, in some embodiments, when the communication channel 21 is in the open state, the protrusion of the wave spring 5 contacts the plunger 3. In other words, when the plunger 3 is in the initial state, the plunger 3 contacts the protrusion, preventing the wave spring 5 from axial movement.

[0037] To improve sealing, in some embodiments, a first sealing gasket 22 is provided between the end surface of the sealing boss and the wave spring 5, and a second sealing gasket 31 is provided on the end surface of the plunger 3. When the plunger 3 is in its final position, the wave spring 5 is flattened between the first sealing gasket 22 and the second sealing gasket 31. The first sealing gasket 22 and the second sealing gasket 31 have compressive elasticity, which can form a good seal.

[0038] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of this application.

Claims

1. A fast response stiffness valve, characterized in that: include A fixed seat (1) having a sliding cavity provided therein; A connecting seat (2) is mounted on one end of the fixing seat (1) and is provided with a connecting passage (21) for connecting with the air spring cavity; A plunger (3) is slidably disposed in the sliding cavity and is configured to open or close the communication channel (21); A dynamic sealing component (4) is installed between the fixed seat (1) and the plunger (3), and during the movement of the plunger (3), the dynamic sealing component (4) has at least a first compression amount, a second compression amount, and a third compression amount in sequence, wherein the first compression amount is 0 and is equal to the compression amount of the dynamic sealing component (4) when the plunger (3) starts to move toward the connecting seat (2), the third compression amount is equal to the compression amount of the dynamic sealing component (4) when the plunger (3) closes the connecting channel (21), and the second compression amount is greater than or equal to the first compression amount and less than the third compression amount; When the dynamic sealing component (4) is in the second compression amount, the distance the plunger (3) moves is greater than the distance the plunger (3) moves when the dynamic sealing component (4) is in the third compression amount.

2. The fast response stiffness valve according to claim 1, characterized in that: The dynamic sealing component (4) has at least one sealing lip, and the surfaces of the plunger (3) corresponding to the dynamic sealing component (4) are provided with at least two sections of different diameters. During the movement of the plunger (3), the surface of the plunger (3) has at least two sections of different diameters corresponding to each of the sealing lips.

3. The fast response stiffness valve according to claim 2, characterized in that: The dynamic sealing component (4) has a sealing lip.

4. The fast response stiffness valve according to claim 2, characterized in that: The dynamic sealing component (4) has two sealing lips, and the surfaces of the plunger (3) corresponding to the dynamic sealing component (4) are provided with a first diameter section (38), a second diameter section (39), a third diameter section (310), and a fourth diameter section (311) in a direction from the connecting seat (2) to the fixed seat (1), wherein the diameter of the first diameter section (38) is smaller than the diameter of the second diameter section (39), and the diameter of the third diameter section (310) is smaller than the diameter of the fourth diameter section (311); When the plunger (3) begins to move toward the connecting seat (2), one of the sealing lips corresponds to the first diameter section (38), and the other sealing lip corresponds to the third diameter section (310); when the plunger (3) closes the connecting passage (21), the two sealing lips correspond to the second diameter section (39) and the fourth diameter section (311), respectively.

5. The fast response stiffness valve according to claim 4, characterized in that: When the dynamic sealing component (4) is in a second compression amount, one of the sealing lips corresponds to the first diameter section (38), and the other corresponds to the third diameter section (310).

6. The fast response stiffness valve according to claim 4, characterized in that: When the dynamic sealing component (4) is in the second compression amount, over at least a portion of the stroke of the plunger (3), one of the sealing lips corresponds to the second diameter section (39) or the fourth diameter section (311), and the other sealing lip corresponds to the first diameter section (38) or the third diameter section (310).

7. The fast response stiffness valve according to any one of claims 4 to 6, characterized in that: The first diameter section (38) and the third diameter section (310) are both equal diameter sections.

8. The fast response stiffness valve according to any one of claims 4 to 6, characterized in that: The diameters of the first diameter section (38) and the third diameter section (310) gradually increase in a direction from the connecting seat (2) to the fixed seat (1).

9. The fast response stiffness valve according to any one of claims 1 to 6, characterized in that: The connecting seat (2) is provided with a sealing boss corresponding to the position of the plunger (3), the connecting channel (21) passes through the sealing boss, and a wave spring (5) is provided on the end surface of the sealing boss close to the plunger (3); when the wave spring (5) is flattened between the plunger (3) and the sealing boss, the connecting channel (21) is in a closed state.

10. The fast response stiffness valve according to claim 9, characterized in that: A plurality of limit blocks (23) protruding from the end surface of the sealing boss are provided on the outside of the sealing boss, the wave spring (5) is provided between the plurality of limit blocks (23), and a plurality of guide blocks (32) are provided on the outside of the plunger (3), the position of the guide block (32) corresponding to the gap position between two adjacent limit blocks (23).

11. The fast response stiffness valve according to claim 10, characterized in that: When the communication channel (21) is in an open state, the raised portion of the wave spring (5) contacts the plunger (3).

12. The fast response stiffness valve according to claim 11, characterized in that: A first sealing gasket (22) is provided between the end surface of the sealing boss and the wave spring (5), and a second sealing gasket (31) is provided on the end surface of the plunger (3).

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