Air spring with detachable gland structure

Abstract

The present invention provides an air spring with a detachable pressure cover structure, comprising an upper air chamber, a pressure plate, a vibration isolation block and a pressure cover, wherein an annular groove is provided on the side wall of the accommodating cavity at the center of the upper air chamber; the pressure plate is arranged in the accommodating cavity, and the pressure plate is assembled into the annular groove through its lower bent edge; the vibration isolation block is assembled in the accommodating cavity and abuts against the inner wall of the pressure plate; the pressure cover is assembled on the top of the vibration isolation block, and the pressure cover abuts against the inner wall of the pressure plate through its flange. The present invention completes the assembly of the pressure cover by providing an annular groove on the inner wall of the accommodating cavity of the upper air chamber of the air spring, embedding three pressure plates, pressing the pressure cover onto the upper end of the outer skeleton of the vibration isolation block, and then rotating and pressing the three spring plates onto the pressure cover; by cutting off the exposed part of the spring plate, the pressure cover can be taken out and the internal structure can be replaced; thereby solving the problem that the pressure cover in the existing structure of the air spring cannot be disassembled and the pressure cover makes abnormal noise after the rubber of the vibration isolation block ages.

Description

Technical Field

[0001] The present invention relates to the technical field of air springs, and in particular to an air spring with a detachable gland structure. Background Art

[0002] An air spring is a device that generates elastic force by inflating with gas. It is commonly used in automotive suspension systems and industrial machinery. It consists of an airtight, flexible bag and an inflation valve. By injecting gas into the inflation valve, the spring's elasticity and hardness can be adjusted, thereby enabling the adjustment and control of the suspension system.

[0003] An air spring gland is a decorative or protective covering on the top of an air spring. It's typically made of hard plastic or rubber and is used to cover and protect the top connection of the air spring. The gland serves two main functions. First, it protects the air spring from dust, moisture, and other debris that could affect its proper function. Second, it provides aesthetic appeal, adding a neater, more aesthetically pleasing appearance to the top of the air spring, blending in with the surroundings or the vehicle's exterior.

[0004] Due to the characteristics of air springs such as large load capacity and variable stiffness, more and more vehicles are beginning to be equipped with air springs. At present, the gland in the air spring structure is mostly assembled by two methods: interference fit on the rubber of the vibration isolation block or by spinning the gland into the upper air chamber. The first assembly method cannot provide sufficient upward support force to the gland after the rubber of the vibration isolation block ages, resulting in the gland moving up and down and making abnormal noises; the second assembly method has the problem that the gland cannot be disassembled and assembled, which greatly increases the maintenance cost after the parts are damaged. Summary of the Invention

[0005] In view of the shortcomings of the prior art mentioned above, the present invention provides an air spring with a detachable gland structure, which comprises opening an annular groove on the inner wall of the accommodating cavity of the upper air chamber of the air spring, embedding three glands, pressing the gland onto the upper end of the outer skeleton of the vibration isolation block, and then screwing the three spring leaves onto the gland; by cutting off the exposed part of the spring leaves, the gland can be taken out and the internal structure replaced; thereby solving the problem that the gland in the existing structure of the air spring cannot be disassembled and that the gland makes abnormal noises after the rubber of the vibration isolation block ages.

[0006] The present invention provides an air spring with a detachable pressure cover structure, comprising an upper air chamber, a pressure plate, a vibration isolation block and a pressure cover, wherein an annular groove is provided on the side wall of the accommodating cavity at the center of the upper air chamber, and the axial direction of the annular groove coincides with the axial direction of the accommodating cavity; the pressure plate is arranged in the accommodating cavity, and the upper end of the pressure plate protrudes from the top of the upper air chamber, and the lower end of the pressure plate is provided with a lower bent edge facing the annular groove, and the pressure plate is assembled into the annular groove through its lower bent edge; the vibration isolation block is assembled in the accommodating cavity and abuts against the inner wall of the pressure plate; the pressure cover is assembled on the top of the vibration isolation block, and the pressure cover abuts against the inner wall of the pressure plate through its flange; after the pressure plate, the vibration isolation block and the pressure cover are assembled into the accommodating cavity in sequence, the pressure plate is spun to protrude from the top of the upper air chamber, so that the upper end of the pressure plate forms an upper bent edge that is close to the pressure cover, thereby completing the assembly of the pressure cover; and the pressure cover is removed by cutting the upper bent edge of the pressure plate.

[0007] In one embodiment of the present invention, the accommodating chamber includes an upper accommodating portion and a lower accommodating portion, the inner diameter of the upper accommodating portion is larger than that of the lower accommodating portion, and the annular groove is opened at the bottom end of the inner wall of the upper accommodating portion; after the pressing sheet is assembled to the upper accommodating portion of the accommodating chamber, the inner wall of the pressing sheet is flush with the inner wall of the lower accommodating portion.

[0008] In one embodiment of the present invention, at least three pressing plates are arranged around the accommodating cavity and located between the vibration isolation block and the inner wall of the upper accommodating portion, and the vibration isolation block abuts against the pressing plates and the inner wall of the lower accommodating portion through its outer skeleton.

[0009] In one embodiment of the present invention, the pressing pieces have the same shape and are evenly distributed around the circumference of the accommodating cavity.

[0010] In one embodiment of the present invention, a first sealing ring is provided on the surface of the outer frame contacting the inner wall of the lower accommodating portion.

[0011] In one embodiment of the present invention, a plurality of protrusions are further provided on the outer frame, the number of the protrusions corresponds to the number of the pressing sheets, and the protrusions are clamped between adjacent pressing sheets.

[0012] In one embodiment of the present invention, the protrusion and the adjacent pressing piece are in interference fit.

[0013] In one embodiment of the present invention, an inner core is provided in the middle of the vibration isolation block, and a conical groove is symmetrically provided on the vibration isolation block about the inner core, and the surface of the inner core is exposed, and the opening area of ​​the conical groove on the end face of the vibration isolation block is larger than the exposed surface area of ​​the inner core, and the inner core is connected to the piston rod of the air spring.

[0014] In one embodiment of the present invention, a through opening is provided on the inner core for the piston rod to pass through. The axial diameter of the end of the piston rod passing through the through opening is smaller than the axial diameter of the piston rod main body. The piston rod is pressed against the top end of the inner core by the locking nut on its end, and the bottom end of the inner core rests on the end face of the piston rod main body that is larger than the end face of the piston rod.

[0015] In one embodiment of the present invention, a second sealing ring is provided on the surface of the inner core that contacts the piston rod, and the second sealing ring protrudes from the upper end surface of the inner core and contacts the locking nut.

[0016] The beneficial effects of the present invention are as follows: by opening an annular groove on the inner wall of the accommodating cavity of the upper air chamber, embedding three pressing sheets, pressing the pressure cover onto the upper end of the outer skeleton of the vibration isolation block, and then screwing the three spring sheets onto the pressure cover; and by cutting off the exposed part of the spring sheet, the pressure cover can be taken out and the internal structure replaced, which not only ensures that the pressure cover will not move up and down after long-term use of the empty spring, but also ensures disassembly and assembly.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is clear that a person skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0019] Figure 1 Schematic diagram of the assembly cross section of the upper air chamber portion of the air spring of the present invention;

[0020] Figure 2 It is a three-dimensional assembly diagram of the upper air chamber portion of the air spring of the present invention;

[0021] Figure 3 Schematic diagram of the vibration isolation block structure of the present invention;

[0022] Figure 4 Schematic diagram of the tableting structure of the present invention.

[0023] In the figure: 1. Upper air chamber; 10. Accommodating cavity; 101. Upper accommodating portion; 102. Lower accommodating portion; 11. Ring groove; 2. Pressing piece; 21. Upper bending edge; 22. Lower bending edge; 3. Pressure cover; 4. Vibration isolation block; 40. Conical groove; 41. External skeleton; 411. Protrusion; 42. Inner core; 421. Through port; 5. Locking nut; 6. First sealing ring; 7. Second sealing ring; 8. Piston rod. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following examples and the features in the examples can be combined with each other unless they conflict. It should also be understood that the terms used in the examples of the present invention are for the purpose of describing specific embodiments, not for the purpose of limiting the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0025] See also Figures 1 to 4 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0026] See also Figures 1 to 4 The present invention provides an air spring with a detachable gland structure, comprising an upper air chamber 1, a pressing plate 2, a vibration isolation block 4 and a gland 3; wherein, the upper air chamber 1 is provided with an annular groove 11 on the side wall of the accommodating cavity 10 at the center thereof, and the axial direction of the annular groove 11 coincides with the axial direction of the accommodating cavity 10; the pressing plate 2 is arranged in the accommodating cavity 10, and the upper end of the pressing plate 2 protrudes from the top of the upper air chamber 1, and the lower end of the pressing plate 2 is provided with a lower bent edge 22 facing the annular groove 11, and the pressing plate 2 is arranged by its lower bent edge 22 Fitted into the annular groove 11; the vibration isolation block 4 is assembled in the accommodating cavity 10 and abuts against the inner wall of the pressing plate 2; the pressure cover 3 is assembled on the top of the vibration isolation block 4, and the pressure cover 3 abuts against the inner wall of the pressing plate 2 through its flange; after the pressing plate 2, the vibration isolation block 4 and the pressure cover 3 are assembled into the accommodating cavity 10 in sequence, the pressing plate 2 is spun to protrude from the top of the upper air chamber 1, so that the upper end of the pressing plate 2 forms an upper bent edge 21 that is close to the pressure cover 3, completing the assembly of the pressure cover 3; and the pressure cover 3 is removed by cutting the upper bent edge 21 of the pressing plate 2.

[0027] In this embodiment, an annular groove 11 is opened on the inner wall of the accommodating cavity 10 in the upper air chamber 1 of the air spring, and the lower bent edge 22 formed by bending the lower end of the pressing plate 2 is embedded in the annular groove 11 of the upper air chamber 1. The upper end of the pressing plate 2 is in a vertical state at this time, and the vibration isolation block 4 is installed into the accommodating cavity 10 of the upper air chamber 1 and is tightly pressed against the inner wall of the pressing plate 2. Then, the pressure cover 3 is pressed between the top of the vibration isolation block 4 and the upper end of the pressing plate 2, and the upper end of the pressing plate 2 is spun and bent to be tightly pressed against the pressure cover 3. At this time, the upper bent edge 21 of the pressing plate 2 is formed to ensure that there is no space for the vibration isolation block 4 in the accommodating cavity 10 to move up and down.

[0028] If the air spring needs to be maintained and the gland 3 needs to be disassembled, the gland 3 can be removed after cutting the upper bent edge 21 of the pressing plate 2, and the internal parts, such as the vibration isolation block 4, shock absorber, sealing ring, etc., can be replaced; then a new pressing plate 2 can be replaced and the installation steps can be repeated to avoid damage to the gland 3 structure during the disassembly and assembly process, so that the gland 3 can be reused, realizing low-cost disassembly and assembly of the air spring.

[0029] Furthermore, the accommodating chamber 10 includes an upper accommodating portion 101 and a lower accommodating portion 102, the inner diameter of the upper accommodating portion 101 is larger than that of the lower accommodating portion 102, and the annular groove 11 is opened at the bottom end of the inner wall of the upper accommodating portion 101; after the pressing sheet 2 is assembled to the upper accommodating portion 101 of the accommodating chamber 10, the inner wall of the pressing sheet 2 is flush with the inner wall of the lower accommodating portion 102.

[0030] The accommodating chamber 10 is divided into two parts, an upper accommodating portion 101 and a lower accommodating portion 102, according to its inner diameter, and space is reserved in the upper accommodating portion 101 for the assembly of the pressing plate 2. After the pressing plate 2 is assembled to the upper accommodating portion 101, an accommodating space with the same inner diameter as the lower accommodating portion 102 is left in the accommodating chamber 10 to ensure that the subsequently assembled vibration isolation block 4 remains stable. At the same time, the size of the pressing plate 2 can be reduced so that the pressing plate 2 only needs to be extended into the annular groove 11 at the bottom end of the upper accommodating portion 101 to complete the assembly. On the one hand, the pressing plate 2 is axially limited by extending into the annular groove 11 through the lower bent edge 22, and on the other hand, the vibration isolation block 4 is pressed against the inner wall of the upper accommodating portion 101 to achieve radial limitation, thereby maintaining the stability of the structure of the pressing plate 2.

[0031] See also Figure 2 In one embodiment, at least three pressing plates 2 are arranged around the accommodating cavity 10 and are located between the vibration isolation block 4 and the inner wall of the upper accommodating portion 101, and the vibration isolation block 4 is against the pressing plate 2 and the inner wall of the lower accommodating portion 102 through its outer skeleton 41.

[0032] Furthermore, the pressed tablets 2 have the same shape and are evenly distributed around the circumference of the accommodating cavity 10. A first sealing ring 6 is provided on the surface of the outer frame 41 that contacts the inner wall of the lower accommodating portion 102.

[0033] Since the lower bend edge 22 of the pressing plate 2 makes its size larger than the inner diameter of the accommodating cavity 10, the pressing plate 2 is divided into at least three pieces, and then the pressing plate 2 is assembled into the accommodating cavity 10, so that the size and shape of the pressing plates 2 are the same to reduce differentiation and direct use, and the uniform distribution is also used to achieve balanced force. The vibration isolation block 4 is generally made of elastic material according to its function, making its support weaker than that of rigid material. Therefore, an exoskeleton 41 is provided on the vibration isolation block 4. The exoskeleton 41 is pressed against the inner wall of the accommodating cavity 10 and the pressing plate 2 to ensure the installation stability of the vibration isolation block 4.

[0034] It should be noted that the first sealing ring 6 is mounted on the outer frame 41 and is in close contact with the inner wall of the lower housing 102 to achieve a sealing effect. The sealing force acting on the first sealing ring 6 is radially directed, so that the sealing effect is not affected by changes in the axial stress of the air spring. Therefore, during the assembly process of the above embodiment, the vibration isolation block 4 equipped with the sealing ring is simultaneously installed into the housing cavity 10 of the upper air chamber 1 and is in close contact with the inner wall of the pressing plate 2.

[0035] See also Figure 2 and Figure 3 In one embodiment, a plurality of protrusions 411 are further provided on the outer frame 41 , the number of the protrusions 411 corresponds to the number of the pressing pieces 2 , and the protrusions 411 are clamped between adjacent pressing pieces 2 .

[0036] Furthermore, the protrusion 411 and the adjacent pressing piece 2 are in interference fit.

[0037] In this embodiment, the exoskeleton 41 of the vibration isolation block 4 has three protruding structures, which separate the three pressing sheets 2 so that multiple pressing sheets 2 are evenly distributed in the circumferential direction of the accommodating cavity 10; at the same time, the protrusion 411 and the pressing sheet 2 are interference fit so that they are in a tightly fitted state, thereby enhancing the stability of the pressing sheet 2 in the circumferential direction.

[0038] See also Figure 1 and Figure 3 In one embodiment, an inner core 42 is provided in the middle of the vibration isolation block 4, and a conical groove 40 is symmetrically opened on the vibration isolation block 4 about the inner core 42, and the surface of the inner core 42 is exposed, and the opening area of ​​the conical groove 40 on the end face of the vibration isolation block 4 is larger than the exposed surface area of ​​the inner core 42, and the inner core 42 is connected to the piston rod 8 of the air spring.

[0039] Furthermore, the inner core 42 is provided with an opening 421 for the air spring's piston rod 8 to pass through. The end of the piston rod 8 that passes through the opening 421 has a smaller axial diameter than the main body of the piston rod 8. The piston rod 8 is pressed against the top of the inner core 42 by the locking nut 5 on its end. The bottom of the inner core 42 rests on the end surface of the main body of the piston rod 8, which is larger than the end of the piston rod 8. A second sealing ring 7 is provided on the surface of the inner core 42 that contacts the piston rod 8. The second sealing ring 7 protrudes from the upper end surface of the inner core 42 and contacts the locking nut 5.

[0040] The inner core 42 in the middle of the vibration isolation block 4 is used to connect with the piston rod 8 of the air spring. Conical grooves 40 are opened in the vibration isolation block 4 on both sides of the inner core 42 to expose the surface of the inner core 42, so as to match the clamping nuts contacting the upper and lower ends of the inner core 42 and the end surface of the piston rod 8 whose main part is larger than the end. Then, the inner core 42 and the piston rod 8 are firmly connected through the clamping nut, so that the top end of the piston rod 8 is connected and fixed to the upper air chamber 1 through the inner core 42 of the vibration isolation block 4. Similarly, the second sealing ring 7 provided on the inner core 42, like the first sealing ring 6, will not be affected by the axial stress of the air spring and maintains its sealing effect. The top of the second sealing ring 7 protrudes from the end face of the inner core 42 and contacts the locking nut 5, so that the second sealing ring 7 is further compressed during the installation of the locking nut 5, thereby improving its sealing effect.

[0041] The present invention also provides a method for assembling and disassembling a detachable gland structure for an air spring, comprising the following contents:

[0042] See also Figure 1 and Figure 2 , open an annular groove 11 on the inner wall of the upper air chamber 1 of the air spring, insert the lower bent edge 22 of the pressing piece 2 into the annular groove 11 of the accommodating cavity 10 of the upper air chamber 1, and the upper end of the pressing piece 2 is in a vertical state at this time. Then install the vibration isolation block 4 equipped with the first sealing ring 6 into the accommodating cavity 10 of the upper air chamber 1 and keep it close to the inner wall of the pressing piece 2. Figure 3 As shown, the outer skeleton 41 of the vibration isolation block 4 has three protrusions 411 structures, and the protrusions 411 separate the three pressing pieces 2 and have an interference fit with the pressing pieces 2. The inner core 42 of the vibration isolation block 4 is grooved on the upper end face of the piston rod 8. The sealing ring is assembled into the groove of the inner core 42 of the vibration isolation block 4. The locking nut 5 presses the inner core 42 of the vibration isolation block 4 and cooperates with the sealing ring to achieve sealing. After the pressure cover 3 is pressed on the outer skeleton 41 of the vibration isolation block 4, the upper end of the pressing piece 2 is spun and bent to fit the pressure cover 3 to ensure that the vibration isolation block 4 has no space to move up and down.

[0043] See also Figure 4If you need to remove the pressure cover 3, you need to cut the upper bent part of the pressure plate 2, that is, the upper bent edge 21, and then you can take out the pressure cover 3 and replace the internal parts, such as the vibration isolation block 4, shock absorber, sealing ring, etc.; replace the new pressure plate 2 and repeat the installation steps to achieve low-cost disassembly and assembly of the air spring.

[0044] In summary, the present invention provides an air spring with a detachable pressure cover 3 structure, which is achieved by slotting the inner wall of the upper air chamber 1, embedding three pressure plates 2, pressing the pressure cover 3 onto the upper end of the outer skeleton 41 of the vibration isolation block 4, and then screwing the three spring plates onto the pressure cover 3; and by cutting off the exposed part of the spring plate, the pressure cover 3 can be taken out and the internal structure replaced, which not only ensures that the pressure cover 3 will not move up and down after long-term use of the empty spring, but also ensures disassembly and assembly.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. An air spring with a detachable gland structure, characterized in that: include: An upper air chamber (1), wherein an annular groove (11) is formed on the side wall of the accommodating cavity (10) at the center of the upper air chamber (1), and the axial direction of the annular groove (11) coincides with the axial direction of the accommodating cavity (10); A pressing sheet (2), the pressing sheet (2) being arranged in the accommodating cavity (10), and the upper end of the pressing sheet (2) protruding from the top end of the upper air chamber (1), the lower end of the pressing sheet (2) being provided with a lower bent edge (22) facing the annular groove (11), and the pressing sheet (2) being assembled into the annular groove (11) via the lower bent edge (22); a vibration isolation block (4), the vibration isolation block (4) being assembled in the accommodating cavity (10) and resting against the inner wall of the pressing plate (2); A pressure cover (3), the pressure cover (3) is assembled on the top of the vibration isolation block (4), and the pressure cover (3) abuts against the inner wall of the pressing plate (2) through its flange; After the pressing plate (2), the vibration isolation block (4) and the pressure cover (3) are sequentially assembled into the accommodating cavity (10), the pressing plate (2) is spun to protrude from the top of the upper air chamber (1), so that the upper end of the pressing plate (2) forms an upper bending edge (21) that is in close contact with the pressure cover (3), thereby completing the assembly of the pressure cover (3); and the pressure cover (3) is disassembled by cutting the upper bending edge (21) of the pressing plate (2).

2. The air spring according to claim 1, wherein: The accommodating chamber (10) comprises an upper accommodating portion (101) and a lower accommodating portion (102); the inner diameter of the upper accommodating portion (101) is larger than that of the lower accommodating portion (102), and the annular groove (11) is opened at the bottom end of the inner wall of the upper accommodating portion (101); after the pressing sheet (2) is assembled to the upper accommodating portion (101) of the accommodating chamber (10), the inner wall of the pressing sheet (2) is flush with the inner wall of the lower accommodating portion (102).

3. The air spring according to claim 2, wherein: At least three pressing plates (2) are arranged in a surrounding manner in the accommodating cavity (10) and are located between the vibration isolation block (4) and the inner wall of the upper accommodating portion (101), and the vibration isolation block (4) abuts against the pressing plate (2) and the inner wall of the lower accommodating portion (102) through its outer skeleton (41).

4. The air spring according to claim 3, characterized in that The pressing sheets (2) have the same shape and are evenly distributed around the circumference of the accommodating cavity (10).

5. The air spring according to claim 3, wherein: A first sealing ring (6) is provided on the surface of the outer frame (41) contacting the inner wall of the lower accommodating portion (102).

6. The air spring according to claim 5, characterized in that The outer frame (41) is further provided with a plurality of protrusions (411), the number of the protrusions (411) corresponds to the number of the pressing sheets (2), and the protrusions (411) are clamped between adjacent pressing sheets (2).

7. The air spring according to claim 6, characterized in that The protrusion (411) and the adjacent pressing piece (2) are in interference fit.

8. The air spring according to claim 3, wherein: An inner core (42) is provided in the middle of the vibration isolation block (4), and a conical groove (40) is symmetrically opened on the vibration isolation block (4) about the inner core (42), and the surface of the inner core (42) is exposed, and the opening area of ​​the conical groove (40) on the end face of the vibration isolation block (4) is larger than the exposed surface area of ​​the inner core (42), and the inner core (42) is connected to the piston rod (8) of the air spring.

9. The air spring according to claim 8, characterized in that The inner core (42) is provided with a through-hole (421) for the piston rod (8) to pass through. The axial diameter of the end of the piston rod (8) passing through the through-hole (421) is smaller than the axial diameter of the main body of the piston rod (8). The piston rod (8) is pressed against the top end of the inner core (42) by the locking nut (5) on its end. The bottom end of the inner core (42) abuts against the end surface of the main body of the piston rod (8) which is larger than the end of the piston rod (8).

10. The air spring according to claim 9, characterized in that A second sealing ring (7) is provided on the surface of the inner core (42) contacting the piston rod (8), and the second sealing ring (7) protrudes from the upper end surface of the inner core (42) and contacts the locking nut (5).

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