Rigidity valve

Abstract

The utility model belongs to the technical field of vehicle suspension systems, and discloses a rigidity valve which comprises a shell. The guide sleeve is mounted in the shell; the movable iron core is mounted in the guide sleeve in a sliding manner; the coil assembly is arranged outside the guide sleeve in a sleeving manner; the static iron core is mounted in the shell, and a first sealing part is arranged between the static iron core and the guide sleeve; the sealing seat is installed at the bottom of the static iron core, the upper end of the sealing seat extends into the shell, a second sealing part is arranged at the joint of the sealing seat, the static iron core and the shell, and the sealing seat is provided with a fluid channel used for communicating the main cavity and the auxiliary cavity of the air spring; and the plunger is installed in the cavity of the static iron core in a sliding mode, connected with the movable iron core through a valve rod and configured to open or close the fluid channel, and a sliding sealing part is arranged between the plunger and the cavity of the static iron core. The multiple sealing parts are arranged between the parts of the rigidity valve, so that the sealing performance of the rigidity valve is improved, gas leakage is avoided, the air spring has good control precision and effect, and the controllability and comfort of a vehicle are improved.

Description

Technical Field

[0001] This application belongs to the technical field of vehicle suspension systems, and particularly relates to a stiffness valve. Background Technology

[0002] A multi-chamber air spring comprises a main chamber and at least one secondary chamber. A stiffness valve is installed between the main and secondary chambers to control the flow between them, thereby adjusting the overall size of the chambers. A larger chamber volume results in a softer air spring, while a smaller volume results in a stiffer air spring, thus achieving stiffness adjustment of the vehicle's suspension system.

[0003] The stiffness valve consists of components such as a connector, top cover, housing, coil assembly, guide sleeve, moving iron core, stationary iron core, plunger, valve stem, and sealing seat. However, gaps exist between these components, which can easily lead to gas leakage, causing a decrease in internal working pressure. This affects the control accuracy and effectiveness of the air spring, thus impacting vehicle handling and comfort. Utility Model Content

[0004] To address the technical problem that gaps between components in existing technologies can easily lead to gas leakage, this application provides a stiffness valve.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a stiffness valve, comprising:

[0006] case;

[0007] Guide sleeve, installed inside the housing;

[0008] A moving iron core is slidably installed inside the guide sleeve;

[0009] A coil assembly, wherein the coil assembly is sleeved outside the guide sleeve;

[0010] A stationary iron core is installed inside the housing, and a first sealing part is provided between the stationary iron core and the guide sleeve;

[0011] A sealing seat is installed at the bottom of the stationary iron core. The upper end of the sealing seat extends into the housing. A second sealing part is provided at the connection between the sealing seat, the stationary iron core and the housing. The sealing seat is provided with a fluid channel for connecting the main cavity and the auxiliary cavity of the air spring.

[0012] A plunger is slidably installed in the cavity of the stationary iron core and connected to the moving iron core via a valve stem. It is configured to open or close the fluid passage seal, and a sliding sealing part is provided between the plunger and the cavity of the stationary iron core.

[0013] In some embodiments, a sleeve boss is provided at one end of the stationary iron core near the guide sleeve, the guide sleeve is sleeved outside the sleeve boss, and the guide sleeve and the sleeve boss are welded together to form the first sealing part.

[0014] In some embodiments, a first mounting boss is provided at one end of the stationary iron core near the sealing seat, and a first sealing ring is sleeved on the outside of the first mounting boss. The first sealing ring, the first mounting boss, the sealing seat and the housing are all interference-fitted to form a second sealing part.

[0015] In some embodiments, a second mounting boss is provided at one end of the sealing seat near the stationary iron core, and the first sealing ring is interference-fitted with the sealing seat through the second mounting boss. The height of the first sealing ring is greater than the sum of the heights of the first mounting boss and the second mounting boss.

[0016] In some embodiments, a third mounting boss is provided on the inner side of the sealing seat near the stationary iron core cavity. The third mounting boss extends into the cavity of the stationary iron core. A first mounting boss forms a step in the inner cavity of the stationary iron core. The outer diameter of the third mounting boss matches the inner diameter of the first mounting boss. The end face of the third mounting boss, the inner side of the first mounting boss, and the step form a mounting groove for the sliding seal.

[0017] In some embodiments, one end of the housing extends to the outside of the sealing seat and is press-fitted to the sealing seat.

[0018] In some embodiments, the stiffness valve further includes:

[0019] A connector, mounted on top of the housing, is configured to connect to the coil assembly via terminals;

[0020] A top cover is fitted over the outside of the connector and a third sealing part is provided between the top cover and the connector. The bottom of the top cover extends to the outside of the housing and a fourth sealing part is provided between the top cover and the housing.

[0021] In some embodiments, the top of the top cover is further provided with a flange facing its center, the flange abutting against the connector, and the third sealing portion extends between the flange and the connector.

[0022] In some embodiments, the third sealing portion is formed by welding the top cover to the connector.

[0023] In some embodiments, the housing is press-fitted to the outside of the coil assembly at one end near the connector, and the housing forms a bend at the press-fitting connection, with the fourth sealing portion located at the bend.

[0024] In some embodiments, a mounting groove is provided on the end face of the top cover near the housing, and a second sealing ring is provided in the mounting groove to form the fourth sealing part, and the second sealing ring is interference-fitted with the bending part.

[0025] In some embodiments, the second sealing ring includes a main body portion and an extension portion extending radially from the main body portion, wherein the shape of one side of the extension portion near the bend portion is consistent with the shape of the bend portion; the width of the second sealing ring is greater than the width of the mounting groove, and the height of the second sealing ring is greater than the height of the mounting groove.

[0026] Beneficial effects: By setting multiple sealing parts between multiple components of the stiffness valve in this application, the sealing performance of the stiffness valve is improved, gas leakage is avoided, and the air spring has good control accuracy and effect, thereby improving vehicle handling and comfort. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a rigid valve structure.

[0028] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0029] Figure 3 This is a schematic diagram of another type of stiffness valve structure.

[0030] In the diagram: 1. Housing, 11. Third sealing ring, 12. Bending part, 2. Guide sleeve, 21. First sealing part, 3. Moving iron core, 4. Coil assembly, 5. Stationary iron core, 51. Sliding sealing part, 52. Sleeve boss, 53. First mounting boss, 6. Sealing seat, 61. Second sealing part, 611. First sealing ring, 62. Second mounting boss, 63. Third mounting boss, 7. Plunger, 8. Connector, 81. Third sealing part, 82. Terminal block, 9. Top cover, 91. Fourth sealing part, 911. Main body, 912. Extension, 92. Mounting groove, 93. Flanged edge. Detailed Implementation

[0031] The present application will be further described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative changes are within the protection scope of the present application.

[0032] The stiffness valve is installed between the main and auxiliary chambers of the air spring. It adjusts the size of the overall chamber by controlling the flow of fluid between the main and auxiliary chambers. In the closed state (closed and open between the main and auxiliary chambers), in addition to the requirement for good sealing between the plunger 7 and the sealing seat 6, there are also gaps between the assembled parts of the stiffness valve, which may also pose a risk of leakage.

[0033] This application proposes the following improvement schemes for the sealing performance of stiffness valves, such as... Figure 1 As shown, the device includes a housing 1, with a guide sleeve 2, a moving iron core 3, a coil assembly 4, a plunger 7, and a stationary iron core 5 installed inside the housing 1. The stationary iron core 5 is installed at the bottom of the housing 1, and the guide sleeve 2 is installed above the stationary iron core 5. The guide sleeve 2 is a cylindrical structure with one open end, with the opening located near the iron core. The moving iron core 3 is installed inside the guide sleeve 2, and the coil assembly 4 is sleeved on the outside of the guide sleeve 2. When the coil assembly 4 is energized, the moving iron core 3 can slide axially along the guide sleeve 2. A sealing seat 6 is installed at the bottom of the housing 1, and its upper end extends into the housing. The inner cavity of the air spring 1 abuts against the end face of the stationary iron core 5. The sealing seat 6 is provided with a fluid channel for connecting the main cavity and the auxiliary cavity of the air spring. The stationary iron core 5 is provided with a cavity at one end near the sealing seat 6. The plunger 7 is slidably installed in the cavity of the stationary iron core 5. The plunger 7 is connected to the valve stem. The valve stem passes through the stationary iron core 5 and is connected to the moving iron core 3. When the moving iron core 3 moves under the drive of the coil assembly 4, it can drive the plunger 7 to move in the cavity of the stationary iron core 5 through the valve stem, thereby causing the plunger 7 to close the fluid channel on the sealing seat 6, thereby closing and disconnecting the main cavity and the auxiliary cavity of the air spring.

[0034] A first sealing part 21 is provided at the connection between the stationary iron core 5 and the guide sleeve 2; a second sealing part 61 is provided at the connection between the sealing seat 6, the stationary iron core 5, and the housing 1; and a sliding sealing part 51 is provided between the plunger 7 and the inner wall of the cavity of the stationary iron core 5. These multiple sealing parts prevent gas leakage from the upper and lower ends of the housing 1 through the gaps between the components, improving the sealing performance of the rigid valve. Consequently, when this rigid valve is assembled in an air spring, the air spring has good control precision and effect, improving vehicle handling and comfort.

[0035] In some embodiments, a fitting boss 52 is provided at one end of the stationary iron core 5 near the guide sleeve 2. The guide sleeve 2 is fitted over the fitting boss 52, and the guide sleeve 2 and the fitting boss 52 are welded together to form the first sealing part 21. After welding and fixing, the first sealing part 21 is formed between the guide sleeve 2 and the fitting boss 52. The fitting boss 52 increases the contact area between the stationary iron core 5 and the guide sleeve 2, that is, increases the area of ​​the first sealing part 21, which is beneficial to improving the sealing effect. The specific welding method can be laser welding.

[0036] In some embodiments, a first mounting boss 53 is provided at one end of the stationary iron core 5 near the sealing seat 6. A first sealing ring 611 is sleeved on the outside of the first mounting boss 53. The first sealing ring 611, the first mounting boss 53, the sealing seat 6, and the housing 1 are all interference-fitted to form a second sealing part 61. A single first sealing ring 611 is sufficient to seal the first mounting boss 53, the sealing seat 6, and the housing 1, effectively sealing the lower end of the housing 1. The structure is simple, as... Figure 1 As shown, the first sealing ring 611 has a rectangular cross-section. Its radial outer and inner sides are respectively press-fitted with the housing 1 and the first mounting boss 53, and its lower end face is press-fitted with the sealing seat 6. The use of a rectangular cross-section sealing ring can effectively increase the contact area between the sealing ring and the first mounting boss 53, the housing 1 and the sealing seat 6, thereby improving the sealing effect.

[0037] In some embodiments, the sealing seat 6 has a second mounting boss 62 at one end near the stationary iron core 5, and the first sealing ring 611 is interference-fitted with the sealing seat 6 through the second mounting boss 62. The height of the first sealing ring 611 is greater than the sum of the heights of the first mounting boss 53 and the second mounting boss 62. Figure 1 As shown, after the end faces of the first mounting boss 53 and the second mounting boss 62 abut against each other, a groove structure for assembling the first sealing ring 611 is formed together on the outside of the first mounting boss 53 and the second mounting boss 62. The first sealing ring 611 also serves to position the sealing seat 6. In embodiments where the first sealing ring 611 has a rectangular cross-section, after the first sealing ring 611 is installed, the gap between the end faces of the first mounting boss 53 and the second mounting boss 62 is located on the inner side of the first sealing ring 611, rather than flush with the lower end face of the sealing ring, which helps to improve the sealing effect.

[0038] Similarly, a third mounting boss 63 is provided on the inner side of the sealing seat 6 near the cavity of the stationary iron core 5. The third mounting boss 63 extends into the cavity of the stationary iron core 5. The first mounting boss 53 forms a step in the inner cavity of the stationary iron core 5. The outer diameter of the third mounting boss 63 matches the inner diameter of the first mounting boss 53, which serves as a positioning and insertion function. At the same time, the end face of the third mounting boss 63, the inner side of the first mounting boss 53, and the step form the mounting groove of the sliding sealing part 51. The sliding sealing part 51 also forms a seal at the connection between the stationary iron core 5 and the sealing seat 6. In other words, there is a double sealing structure of the sliding sealing part 51 and the first sealing ring 611 at this location, resulting in a better sealing effect.

[0039] In some embodiments, one end of the housing 1 extends to the outside of the sealing seat 6 and is riveted to the sealing seat 6. The housing 1 then tightly presses the sealing seat 6 in place, ensuring close contact between the sealing seat 6 and the end face of the stationary iron core 5. To maintain a good sealing effect of the sealing seat 6 in the corresponding mounting structure after the rigid valve is installed on the air spring, a groove is also formed at the bottom of the sealing seat 6, and a sealing ring is installed within the groove.

[0040] The above structure prevents gas from entering through the sealing seat 6 from flowing through the sliding seal 51 and the second seal 61, allowing it to circulate only within the fluid channel of the sealing seat 6. The first seal 21 forms a multi-layer sealing structure, preventing gas leakage from the bottom of the housing 1 when the second seal 61 and the sliding seal 51 fail, thus further enhancing the sealing performance of the stiffness valve. To further improve the sealing performance of the stiffness valve, a sealing reinforcement is also applied to the upper end of the housing 1 of the stiffness valve, which can further improve the overall sealing performance of the stiffness valve. The solution is as follows:

[0041] In some embodiments, the stiffness valve further includes a connector 8 and a top cover 9. The connector 8 is mounted above the housing 1 and is configured to connect to the coil assembly 4 via a terminal block 82, facilitating connection of the coil assembly 4 to a power source.

[0042] The top cover 9 is fitted over the connector 8, and a third sealing part 81 is provided between the top cover 9 and the connector 8. The third sealing part 81 keeps the top cover 9 and the connector 8 sealed, preventing air leakage at the connection and further improving the sealing performance of the stiffness valve. The bottom of the top cover 9 extends to the outside of the housing 1, and a fourth sealing part 91 is provided between the top cover 9 and the housing 1. During installation, pressure is applied to the connector 8 and the top cover 9, causing the bottom of the top cover 9 to move axially along the housing 1, forming an interference fit between the bottom of the top cover 9 and the housing 1, thereby fixing the top cover 9 and the connector 8 to the top of the housing 1. The fourth sealing part 91 ensures a seal at the connection between the top cover 9 and the housing 1. In addition, after the stiffness valve is installed behind the air spring, in order to improve the sealing performance between the stiffness valve and the air spring mounting structure, a third sealing ring 11 is provided at the bottom of the top cover 9. The third sealing ring 11 is fitted over the outside of the housing 1, contacts the bottom end face of the top cover 9, and is interference-fitted with the housing 1.

[0043] In some embodiments, the top cover 9 and the connector 8 are welded together to form the third sealing part 81. The top cover 9 and the connector 8 are welded together to form a whole, which not only has a sealing effect, but also facilitates the installation of the two as a whole. The welding method can be laser welding.

[0044] In other embodiments, such as Figure 3As shown, a flange 93 facing the center is also provided on the top of the top cover 9. The flange 93 abuts against the connector 8. The flange 93 and the connector 8 are also connected by welding to form part of the third sealing part 81, which further increases the area of ​​the sealing structure between the top cover 9 and the connector 8, improves the sealing effect, and prevents the connector 8 from separating from the top cover 9 during assembly.

[0045] like Figure 1 As shown, in some embodiments, the end of the housing 1 near the connector 8 is press-fitted to the outside of the coil assembly 4, and the housing 1 forms a bent portion 12 at the press-fit connection, with the fourth sealing portion located in the bent portion 12. The top cover 9 has a mounting groove 92 on its end face near the housing 1, and a second sealing ring is disposed within the mounting groove 92 to form the fourth sealing portion 91. The second sealing ring is interference-fitted with the bent portion 12.

[0046] Specifically, in order to improve the sealing between the top cover 9 and the housing 1, such as Figure 1 and 2 As shown, in some embodiments, the second sealing ring includes a main body 911 and an extension 912 extending radially from the main body 911. The side of the extension 912 near the bend 12 has a shape consistent with the shape of the bend 12, thereby increasing the effective contact area between the second sealing ring and the bend 12 and improving the sealing effect. The width of the second sealing ring is greater than the width of the mounting groove 92, so that the outer and inner surfaces of the second sealing ring form an interference fit structure with the two side walls of the mounting groove 92, improving the sealing performance. The height of the second sealing ring is greater than the height of the mounting groove 92, so that the lower surface of the second sealing ring and the upper surface of the main body 911 are tightly fitted with the surface of the bend 12 and the end face of the mounting groove 92, respectively, improving the sealing performance. The second sealing ring with an irregular shape can effectively match the complex structure of the top cover 9 and the bend 12 of the housing 1, effectively increasing the contact area and improving the sealing effect.

[0047] Through the above solution, the third sealing part 81 and the fourth sealing part 91 prevent gas from leaking from the upper part of the housing 1 when the second sealing part 61 and the sliding sealing part 51 fail, thereby improving the overall sealing performance of the rigid valve.

[0048] While the above disclosure is provided, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. A stiffness valve, characterized in that, include: Shell (1); Guide sleeve (2) is installed inside the housing (1); The moving iron core (3) is slidably installed inside the guide sleeve (2); Coil assembly (4), the coil assembly (4) being sleeved outside the guide sleeve (2); A stationary iron core (5) is installed inside the housing (1), and a first sealing part (21) is provided between the stationary iron core (5) and the guide sleeve (2). A sealing seat (6) is installed at the bottom of the stationary iron core (5). The upper end of the sealing seat (6) extends into the housing (1). A second sealing part (61) is provided at the connection between the sealing seat (6), the stationary iron core (5) and the housing (1). The sealing seat (6) is provided with a fluid channel for connecting the main cavity and the auxiliary cavity of the air spring. A plunger (7) is slidably installed in the cavity of the stationary iron core (5) and connected to the moving iron core (3) via a valve stem. It is configured to open or close the fluid passage. A sliding seal (51) is provided between the plunger (7) and the cavity of the stationary iron core (5).

2. The stiffness valve according to claim 1, characterized in that, The stationary iron core (5) is provided with a sleeve boss (52) at one end near the guide sleeve (2). The guide sleeve (2) is sleeved on the outside of the sleeve boss (52). The guide sleeve (2) and the sleeve boss (52) are welded together to form the first sealing part (21).

3. The stiffness valve according to claim 1, characterized in that, The stationary iron core (5) is provided with a first mounting boss (53) at one end near the sealing seat (6). A first sealing ring (611) is sleeved on the outside of the first mounting boss (53). The first sealing ring (611) is interference-fitted with the first mounting boss (53), the sealing seat (6) and the housing (1) to form a second sealing part (61).

4. The stiffness valve according to claim 3, characterized in that, The sealing seat (6) is provided with a second mounting boss (62) at one end near the stationary iron core (5). The first sealing ring (611) is interference-fitted with the sealing seat (6) through the second mounting boss (62). The height of the first sealing ring (611) is greater than the sum of the heights of the first mounting boss (53) and the second mounting boss (62).

5. The stiffness valve according to claim 4, characterized in that, The sealing seat (6) is provided with a third mounting boss (63) on the inner side of the cavity of the stationary iron core (5). The third mounting boss (63) extends into the cavity of the stationary iron core (5). The first mounting boss (53) forms a step in the inner cavity of the stationary iron core (5). The outer diameter of the third mounting boss (63) matches the inner diameter of the first mounting boss (53). The end face of the third mounting boss (63) forms the mounting groove of the sliding sealing part (51) with the inner side of the first mounting boss (53) and the step.

6. The stiffness valve according to any one of claims 3 to 5, characterized in that, One end of the housing (1) extends to the outside of the sealing seat (6) and is press-fitted to the sealing seat (6).

7. The stiffness valve according to claim 1, characterized in that, Also includes: A connector (8), mounted on top of the housing (1), is configured to connect to the coil assembly (4) via a terminal block (82); The top cover (9) is fitted over the outside of the connector (8) and a third sealing part (81) is provided between the top cover (9) and the connector (8). The bottom of the top cover (9) extends to the outside of the housing (1) and a fourth sealing part (91) is provided between the top cover (9) and the housing (1).

8. The stiffness valve according to claim 7, characterized in that, The top of the cover (9) is also provided with a flange (93) facing its center, the flange (93) abutting against the connector (8), and the third sealing part (81) extends between the flange (93) and the connector (8).

9. The stiffness valve according to claim 7, characterized in that, The housing (1) is press-fitted to the outside of the coil assembly (4) at one end near the connector (8), and the housing (1) forms a bent portion (12) at the press-fitted connection. The fourth sealing portion (91) is located in the bent portion (12). The top cover (9) is provided with a mounting groove (92) on the end face near the housing (1). A second sealing ring is provided in the mounting groove (92) to form the fourth sealing portion (91). The second sealing ring is interference-fitted with the bent portion (12).

10. The stiffness valve according to claim 9, characterized in that, The second sealing ring includes a main body (911) and an extension (912) extending radially from the main body (911). The shape of one side of the extension (912) near the bend (12) is consistent with the shape of the bend (12). The width of the second sealing ring is greater than the width of the mounting groove (92), and the height of the second sealing ring is greater than the height of the mounting groove (92).

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