Maintainable high-stability air spring

Abstract

The invention provides a maintainable high-stability air spring. The maintainable high-stability air spring comprises an upper sleeve and a lower sleeve, wherein the lower end of the upper sleeve is open, and a first cavity is formed in the upper sleeve; the upper end of the lower sleeve is inserted into the lower end of the upper sleeve and can vertically slide relative to the upper sleeve, and the lower sleeve and the upper sleeve are sealed in the circumferential direction. An upper lining outer pipe which is horizontally arranged is welded and fixed to the upper end of the upper sleeve, an upper lining made of a flexible material is embedded in the inner side of the upper lining outer pipe, and an upper lining inner pipe is embedded in the inner side of the upper lining; a lower lining outer pipe which is horizontally arranged is welded and fixed to the lower end of the lower sleeve, a lower lining made of a flexible material is embedded in the inner side of the lower lining outer pipe, and a lower lining inner pipe is embedded in the inner side of the lower lining; compared with an air spring on the market at present, the air spring has the advantage of preventing rollover.

Description

Technical Field

[0001] The invention relates to the technical field of air springs, and in particular to a repairable high-stability air spring. Background Art

[0002] Vehicle air springs fill sealed airbags with compressed air and use the nonlinear restoring force of compressed air to isolate vibrations and cushion the impact of uneven road surfaces, thereby reducing the degree of up and down pitch of the vehicle body and improving vehicle ride comfort.

[0003] Currently, most vehicle rear suspensions use air springs with a separate spring and shock absorber design. When the vehicle travels on a bumpy road, the bladder of the existing air spring with a separate spring and shock absorber is subjected to a large stretch, and the upper and lower end covers of the air spring form a large tilt angle. At this time, the pressure on both sides of the piston in the air spring will be inconsistent, which can easily cause the piston to fall out of the aluminum sleeve on the bladder and tip over, seriously affecting the driving experience of the driver and passengers, and even threatening the life safety of the driver and passengers. In addition, the bladder of the air spring is a wearing part and needs to be checked and replaced regularly. However, the existing air springs cannot replace the bladder, and usually the air spring assembly needs to be replaced, which has the disadvantage of high maintenance cost. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a repairable high-stability air spring, which has the advantage of preventing rollover compared with the air springs currently on the market.

[0005] The present invention provides a maintainable high-stability air spring, comprising an upper sleeve with an opening at the lower end and a first cavity arranged inside, and a lower sleeve with an opening at the upper end and a second cavity arranged inside; the upper end of the lower sleeve is inserted into the lower end of the upper sleeve and can slide vertically relative to the upper sleeve, and the lower sleeve and the upper sleeve are circumferentially sealed; a horizontally arranged upper bushing outer tube is welded and fixed to the upper end of the upper sleeve, an upper bushing made of a flexible material is embedded on the inner side of the upper bushing outer tube, and an upper bushing inner tube is embedded on the inner side of the upper bushing; a horizontally arranged lower bushing outer tube is welded and fixed to the lower end of the lower sleeve, a lower bushing made of a flexible material is embedded on the inner side of the lower bushing outer tube, and a lower bushing inner tube is embedded on the inner side of the lower bushing.

[0006] After adopting the above structure, the present invention, under the action of the upper bushing and the lower bushing, since the upper bushing and the lower bushing are both made of flexible materials, the upper bushing and the lower bushing can absorb the deflection generated during the stretching and compression of the air spring by deformation, and since the upper end of the lower sleeve is inserted into the lower end of the upper sleeve and can slide vertically relative to the upper sleeve, it can ensure that the bladder skin in the air spring is always coaxial with the upper sleeve, the lower sleeve, and the piston and the lower end cover in the air spring, that is, it can resist the roll force generated when the air spring is stretched and compressed, thereby ensuring the force balance on both sides of the piston in the air spring, and avoiding the overturning phenomenon of the piston escaping from the aluminum casing on the bladder skin, eliminating safety hazards and avoiding damage to the air spring.

[0007] In a possible embodiment, a plurality of first sealing rings are embedded on the outer wall of the upper end of the lower sleeve and are distributed at intervals along the vertical direction of the lower sleeve, and each first sealing ring is tightly sealed with the outer wall of the lower sleeve and the inner wall of the upper sleeve; the upper sleeve and the lower sleeve form a first air chamber, and a first air nozzle is fixed on one side of the lower end of the lower sleeve, and the first air nozzle is connected to the first air chamber; after adopting this structure, under the action of the plurality of first sealing rings, the purpose of circumferential sealing between the lower sleeve and the upper sleeve can be reliably achieved through the plurality of first sealing rings; and since the upper sleeve and the lower sleeve form the first air chamber, a first air nozzle is fixed on one side of the lower end of the lower sleeve, and the first air nozzle is connected to the first air chamber, when the first air nozzle is connected to an external air source, the air pressure in the first air chamber can be changed by changing the air pressure of the external air source, thereby adjusting the stiffness of the air spring.

[0008] In a possible embodiment, the maintainable high-stability air spring also includes a lower end cover, a bladder skin and a piston; the lower end cover is sleeved on the outside of the lower sleeve and is circumferentially sealed with the lower sleeve, the piston is sleeved on the outside of the upper sleeve and is circumferentially sealed with the upper sleeve, the upper end of the bladder skin is fixed to the piston and circumferentially sealed, the lower end of the bladder skin is fixed to the lower end cover and is circumferentially sealed, the inner side of the bladder skin forms a second air chamber of the air spring, a second air nozzle is fixed on the lower end cover, and the second air nozzle is connected to the second air chamber; by adopting this structure, when the second air nozzle is connected to an external air source, the air pressure in the second air chamber can be changed by changing the air pressure of the external air source, thereby realizing the adjustment of the stiffness of the air spring.

[0009] In a possible implementation, the outer part of the lower sleeve is sleeved with a support base, the support base is welded and fixed to the lower sleeve, and the lower end cover is supported on the support base; an annular convex edge is provided on the outer wall of the lower end of the upper sleeve, the lower end of the piston is supported on the annular convex edge, and an upper end cover and a locking nut are sequentially provided above the piston from bottom to top, the upper end cover is sleeved on the outer part of the upper sleeve, the locking nut is sleeved on the outer part of the upper sleeve and is threadedly connected to the upper sleeve, and the locking nut is used to apply downward pressure to the upper end cover so that the upper end cover presses the piston onto the annular convex edge; after adopting this structure, under the action of the support base, due to the support bottom The seat is welded and fixed to the lower sleeve, so that the lower end cover can be reliably supported on the supporting base; through the arrangement of the upper end cover and the locking nut, the locking nut can exert downward pressure on the upper end cover so that the upper end cover presses the piston against the annular convex edge, thereby achieving reliable fixation of the piston and the upper sleeve; in addition, when the locking nut is removed from the upper sleeve, the lower end cover, the bladder skin, the piston and the upper end cover can be removed from the lower sleeve and the upper sleeve, that is, the accessories of the air spring can be easily inspected and replaced to reduce the cost of air spring maintenance, for example, the bladder skin can be easily replaced.

[0010] In a possible embodiment, a plurality of second sealing rings spaced apart in the vertical direction are embedded on the inner wall of the lower end cover, and each second sealing ring is tightly sealed with the inner wall of the lower end cover and the outer wall of the lower sleeve; a third sealing ring is embedded on the inner wall of the lower end of the piston, and the third sealing ring is tightly sealed with the inner wall of the piston and the outer wall of the upper sleeve; through the provision of the second sealing ring, the second sealing ring can reliably seal the gap between the lower end cover and the lower sleeve; through the provision of the third sealing ring, the third sealing ring can reliably seal the gap between the piston and the upper sleeve.

[0011] In a possible embodiment, an annular groove is provided on the outer wall of the lower end of the piston, the upper end of the bladder skin is inserted into the annular groove, and the upper end of the bladder skin is pressed against the side wall of the annular groove by an upper buckling ring; after adopting this structure, under the action of the upper buckling ring, the upper end of the bladder skin can be reliably fixed on the lower end of the piston. In addition, in order to improve the fixing firmness between the upper end of the bladder skin and the lower end of the piston, a plurality of first annular convex teeth spaced apart in the vertical direction are provided on the side wall of the annular groove, thereby increasing the friction between the upper end of the bladder skin and the side wall of the annular groove, that is, it can further prevent the upper end of the bladder skin from detaching from the piston.

[0012] In a possible embodiment, an annular step is provided on the outer wall of the upper end of the lower end cover, the lower end of the bladder skin is inserted into the annular step, and the lower end of the bladder skin is pressed against the side wall of the annular step by a lower buckling ring. After adopting this structure, under the action of the lower buckling ring, the lower end of the bladder skin can be reliably fixed to the lower end cover. In addition, in order to improve the fixing firmness between the lower end of the bladder skin and the lower end cover, a plurality of second annular protrusions spaced apart in the vertical direction are provided on the side wall of the annular step, thereby increasing the friction between the lower end of the bladder skin and the side wall of the annular step, that is, the lower end of the bladder skin can be further prevented from being separated from the lower end cover.

[0013] In a possible embodiment, a lining ring is sleeved on the outside of the lower buckling ring, and the lining ring abuts against the outer bottom of the bladder skin to provide support for the bladder skin; through the provision of the lining ring, the lining ring can support the bladder skin, thereby improving the pressure-bearing capacity of the bladder skin, and the lining ring can provide circumferential support for the lower buckling ring, thereby improving the reliability and firmness of the lower buckling ring in pressing the lower end of the bladder skin onto the side wall of the annular step, so as to further prevent the lower end of the bladder skin from detaching from the lower end cover.

[0014] In a possible embodiment, an aluminum casing is sleeved on the outer peripheral wall of the bladder skin, a bladder skin support ring is arranged on the inner side of the bladder skin, and the middle part of the bladder skin is pressed against the inner wall of the aluminum casing through the bladder skin support ring; through the arrangement of the aluminum casing and the bladder skin support ring, the aluminum casing and the bladder skin support ring can play a supporting role for the bladder skin, thereby improving the structural strength and pressure bearing capacity of the bladder skin itself.

[0015] In a possible embodiment, the maintainable high-stability air spring also includes a dust cover, the upper end of the dust cover is fixed to the outer edge of the upper end cover, the lower end of the dust cover is fixed to the outer edge of the lower end cover, and the dust cover is sleeved on the outside of the bladder skin and cooperates with the gap of the bladder skin; through the setting of the dust cover, the dust cover can prevent dust from entering the inner side of the dust cover, that is, it can prevent dust from adhering to the piston and the bladder skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0017] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0018] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0019] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] See also Figure 1 As shown, an embodiment of the present application discloses a repairable high-stability air spring, comprising an upper sleeve 1 with an opening at the lower end and a first cavity arranged inside, and a lower sleeve 2 with an opening at the upper end and a second cavity arranged inside; the upper end of the lower sleeve 2 is inserted into the lower end of the upper sleeve 1 and can slide vertically relative to the upper sleeve 1, and the lower sleeve 2 is circumferentially sealed to the upper sleeve 1; a horizontally arranged upper bushing outer tube 11 is welded and fixed to the upper end of the upper sleeve 1, an upper bushing 12 made of a flexible material is embedded on the inner side of the upper bushing outer tube 11, and an upper bushing inner tube 13 is embedded on the inner side of the upper bushing 12; a horizontally arranged lower bushing outer tube 21 is welded and fixed to the lower end of the lower sleeve 2, a lower bushing 22 made of a flexible material is embedded on the inner side of the lower bushing outer tube 21, and a lower bushing inner tube 23 is embedded on the inner side of the lower bushing 22.

[0022] A plurality of first sealing rings 24 are embedded on the outer wall of the upper end of the lower sleeve 2 and are distributed at intervals in the vertical direction of the lower sleeve 2. Each first sealing ring 24 is tightly sealed with the outer wall of the lower sleeve 2 and the inner wall of the upper sleeve 1; the upper sleeve 1 and the lower sleeve 2 form a first air chamber 3, and a first air nozzle 25 is fixed on one side of the lower end of the lower sleeve 2, and the first air nozzle 25 is connected to the first air chamber 3; after adopting this structure, under the action of the plurality of first sealing rings, the purpose of circumferential sealing between the lower sleeve and the upper sleeve can be reliably achieved through the plurality of first sealing rings; and since the upper sleeve and the lower sleeve form the first air chamber, a first air nozzle is fixed on one side of the lower end of the lower sleeve, and the first air nozzle is connected to the first air chamber, when the first air nozzle is connected to an external air source, the air pressure in the first air chamber can be changed by changing the air pressure of the external air source, thereby adjusting the stiffness of the air spring.

[0023] The maintainable high-stability air spring also includes a lower end cover 4, a bladder skin 5 and a piston 6; the lower end cover 4 is sleeved on the outside of the lower sleeve 2 and is circumferentially sealed with the lower sleeve 2, the piston 6 is sleeved on the outside of the upper sleeve 1 and is circumferentially sealed with the upper sleeve 1, the upper end of the bladder skin 5 is fixed to the piston 6 and is circumferentially sealed, the lower end of the bladder skin 5 is fixed to the lower end cover 4 and is circumferentially sealed, the inner side of the bladder skin 5 forms a second air chamber 7 of the air spring, and a second air nozzle 41 is fixed on the lower end cover 4, and the second air nozzle 41 is connected to the second air chamber 7; by adopting this structure, when the second air nozzle is connected to an external air source, the air pressure in the second air chamber can be changed by changing the air pressure of the external air source, thereby realizing the adjustment of the stiffness of the air spring.

[0024] The outer part of the lower sleeve 2 is sleeved with a support base 26, which is welded and fixed to the lower sleeve 2, and the lower end cover 4 is supported on the support base 26; an annular convex edge 14 is provided on the outer wall of the lower end of the upper sleeve 1, and the lower end of the piston 6 is supported on the annular convex edge 14, and an upper end cover 8 and a locking nut 9 are sequentially provided above the piston 6 from bottom to top, the upper end cover 8 is sleeved on the outer part of the upper sleeve 1, and the locking nut 9 is sleeved on the outer part of the upper sleeve 1 and is threadedly connected with the upper sleeve 1, and the locking nut 9 is used to apply downward pressure to the upper end cover 8 so that the upper end cover 8 presses the piston 6 on the annular convex edge 14; after adopting this structure, the upper end cover 8 is sleeved on the outer part of the upper sleeve 1, and the locking nut 9 is sleeved on the outer part of the upper sleeve 1 and is threadedly connected with the upper sleeve 1. The locking nut 9 is used to apply downward pressure to the upper end cover 8 so that the upper end cover 8 presses the piston 6 on the annular convex edge 14; after adopting this structure, the upper end cover 8 is sleeved on the outer part of the upper sleeve 1, and the locking nut 9 is sleeved on the outer part of the upper sleeve 1 and is threadedly connected with the upper sleeve 1. Under the action, since the support base is welded and fixed to the lower sleeve, the lower end cover can be reliably supported on the support base; through the arrangement of the upper end cover and the locking nut, the locking nut can exert downward pressure on the upper end cover so that the upper end cover presses the piston against the annular flange, thereby achieving reliable fixation of the piston and the upper sleeve; in addition, when the locking nut is removed from the upper sleeve, the lower end cover, the bladder skin, the piston and the upper end cover can be removed from the lower sleeve and the upper sleeve, that is, the accessories of the air spring can be easily inspected and replaced to reduce the cost of air spring maintenance, for example, the bladder skin can be easily replaced.

[0025] A plurality of second sealing rings 42 are embedded on the inner wall of the lower end cover 4 and are distributed at intervals in the vertical direction. Each second sealing ring 42 is tightly sealed with the inner wall of the lower end cover 4 and the outer wall of the lower sleeve 2; a third sealing ring 61 is embedded on the inner wall of the lower end of the piston 6, and the third sealing ring 61 is tightly sealed with the inner wall of the piston 6 and the outer wall of the upper sleeve 1; through the setting of the second sealing ring, the second sealing ring can reliably seal the gap between the lower end cover and the lower sleeve; through the setting of the third sealing ring, the third sealing ring can reliably seal the gap between the piston and the upper sleeve.

[0026] An annular groove 62 is provided on the outer wall of the lower end of the piston 6, and the upper end of the bladder skin 5 is inserted into the annular groove 62, and the upper end of the bladder skin 5 is pressed against the side wall of the annular groove 62 by the upper buckling ring 51; after adopting this structure, under the action of the upper buckling ring, the upper end of the bladder skin can be reliably fixed on the lower end of the piston. In addition, in order to improve the fixing firmness between the upper end of the bladder skin and the lower end of the piston, a plurality of first annular convex teeth spaced apart in the vertical direction are provided on the side wall of the annular groove, thereby increasing the friction between the upper end of the bladder skin and the side wall of the annular groove, that is, it can further prevent the upper end of the bladder skin from detaching from the piston.

[0027] An annular step 43 is provided on the outer wall of the upper end of the lower end cover 4, and the lower end of the bladder skin 5 is inserted into the annular step 43, and the lower end of the bladder skin 5 is pressed against the side wall of the annular step 43 by the lower buckling ring 52. After adopting this structure, under the action of the lower buckling ring, the lower end of the bladder skin can be reliably fixed on the lower end cover. In addition, in order to improve the fixing firmness between the lower end of the bladder skin and the lower end cover, a plurality of second annular convex teeth spaced apart in the vertical direction are provided on the side wall of the annular step, so as to increase the friction between the lower end of the bladder skin and the side wall of the annular step, that is, it can further prevent the lower end of the bladder skin from detaching from the lower end cover.

[0028] The outer part of the lower buckling ring 52 is sleeved with a lining ring 53, which abuts against the outer bottom of the bladder skin 5 to support the bladder skin 5; through the setting of the lining ring, the lining ring can support the bladder skin, thereby improving the pressure-bearing capacity of the bladder skin, and the lining ring can provide circumferential support for the lower buckling ring, thereby improving the reliability and firmness of the lower buckling ring in pressing the lower end of the bladder skin onto the side wall of the annular step, so as to further prevent the lower end of the bladder skin from detaching from the lower end cover.

[0029] An aluminum casing 54 is sleeved on the outer peripheral wall of the bladder skin 5, and a bladder skin support ring 55 is arranged on the inner side of the bladder skin 5. The middle part of the bladder skin 5 is pressed against the inner wall of the aluminum casing 54 through the bladder skin support ring 55. Through the arrangement of the aluminum casing and the bladder skin support ring, the aluminum casing and the bladder skin support ring can support the bladder skin, thereby improving the structural strength and pressure bearing capacity of the bladder skin itself.

[0030] The maintainable high-stability air spring also includes a dust cover 10, the upper end of the dust cover 10 is fixed to the outer edge of the upper end cover 8, the lower end of the dust cover 10 is fixed to the outer edge of the lower end cover 4, and the dust cover 10 is sleeved on the outside of the bladder skin 5 and is gap-matched with the bladder skin 5; through the setting of the dust cover, the dust cover can prevent dust from entering the inner side of the dust cover, that is, it can prevent dust from adhering to the piston and the bladder skin.

[0031] After adopting the above structure, the present invention, under the action of the upper bushing and the lower bushing, since the upper bushing and the lower bushing are both made of flexible materials, the upper bushing and the lower bushing can absorb the deflection generated during the stretching and compression of the air spring by deformation, and since the upper end of the lower sleeve is inserted into the lower end of the upper sleeve and can slide vertically relative to the upper sleeve, it can ensure that the bladder skin in the air spring is always coaxial with the upper sleeve, the lower sleeve, and the piston and the lower end cover in the air spring, that is, it can resist the roll force generated when the air spring is stretched and compressed, thereby ensuring the force balance on both sides of the piston in the air spring, and avoiding the overturning phenomenon of the piston escaping from the aluminum casing on the bladder skin, eliminating safety hazards and avoiding damage to the air spring.

[0032] In addition, when the first air nozzle and the second air nozzle are both connected to an external air source, and the external air source changes the air pressure in the first air chamber and the second air chamber (the air pressures in the first air chamber and the second air chamber are controlled separately by the external air source, that is, the air pressure in the first air chamber and the air pressure in the second air chamber can be adjusted separately and adjusted to an inconsistent state), the stiffness of the air spring can be adjusted.

[0033] In addition, in the above structure, when the locking nut is removed from the upper sleeve, the lower end cover, the bladder skin, the piston and the upper end cover can be removed from the lower sleeve and the upper sleeve, that is, the accessories of the air spring can be easily inspected and replaced to reduce the cost of air spring maintenance, for example, the bladder skin can be easily replaced.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A repairable high-stability air spring, characterized in that: The invention comprises an upper sleeve (1) with an opening at the lower end and a first cavity arranged inside thereof, and a lower sleeve (2) with an opening at the upper end and a second cavity arranged inside thereof; the upper end of the lower sleeve (2) is inserted into the lower end of the upper sleeve (1) and can slide vertically relative to the upper sleeve (1), and the lower sleeve (2) and the upper sleeve (1) are circumferentially sealed; a horizontally arranged upper bushing outer tube (11) is welded and fixed to the upper end of the upper sleeve (1); An upper bushing (12) made of a flexible material is embedded on the inner side of the bushing outer tube (11), and an upper bushing inner tube (13) is embedded on the inner side of the upper bushing (12); a lower bushing outer tube (21) arranged horizontally is welded and fixed to the lower end of the lower sleeve (2), and a lower bushing (22) made of a flexible material is embedded on the inner side of the lower bushing outer tube (21), and a lower bushing inner tube (23) is embedded on the inner side of the lower bushing (22).

2. The repairable high stability air spring according to claim 1, characterized in that: A plurality of first sealing rings (24) are embedded on the outer wall of the upper end of the lower sleeve (2) and are spaced apart in the vertical direction of the lower sleeve (2). Each of the first sealing rings (24) is tightly sealed with the outer wall of the lower sleeve (2) and the inner wall of the upper sleeve (1). The upper sleeve (1) and the lower sleeve (2) form a first air chamber (3). A first air nozzle (25) is fixed on one side of the lower end of the lower sleeve (2). The first air nozzle (25) is connected to the first air chamber (3).

3. The repairable high stability air spring according to claim 2, characterized in that: The maintainable high-stability air spring also includes a lower end cover (4), a bladder skin (5) and a piston (6); the lower end cover (4) is sleeved on the outside of the lower sleeve (2) and is circumferentially sealed with the lower sleeve (2), the piston (6) is sleeved on the outside of the upper sleeve (1) and is circumferentially sealed with the upper sleeve (1), the upper end of the bladder skin (5) is fixed to the piston (6) and is circumferentially sealed, the lower end of the bladder skin (5) is fixed to the lower end cover (4) and is circumferentially sealed, the inner side of the bladder skin (5) forms a second air chamber (7) of the air spring, and a second air nozzle (41) is fixed on the lower end cover (4), and the second air nozzle (41) is connected to the second air chamber (7).

4. The repairable high stability air spring according to claim 3, characterized in that: The outer part of the lower sleeve (2) is sleeved with a support base (26), the support base (26) is welded and fixed to the lower sleeve (2), and the lower end cover (4) is supported on the support base (26); an annular convex edge (14) is provided on the outer wall of the lower end of the upper sleeve (1), and the lower end of the piston (6) is supported on the annular convex edge (14); an upper end cover (8) and a locking nut (9) are sequentially provided above the piston (6) from bottom to top, the upper end cover (8) is sleeved on the outer part of the upper sleeve (1), the locking nut (9) is sleeved on the outer part of the upper sleeve (1) and is threadedly connected to the upper sleeve (1), and the locking nut (9) is used to apply downward pressure to the upper end cover (8) so that the upper end cover (8) presses the piston (6) onto the annular convex edge (14).

5. The repairable high stability air spring according to claim 3, characterized in that: A plurality of second sealing rings (42) are embedded on the inner wall of the lower end cover (4) and are spaced apart in the vertical direction. Each of the second sealing rings (42) is tightly sealed with the inner wall of the lower end cover (4) and the outer wall of the lower sleeve (2). A third sealing ring (61) is embedded on the inner wall of the lower end of the piston (6). The third sealing ring (61) is tightly sealed with the inner wall of the piston (6) and the outer wall of the upper sleeve (1).

6. The repairable high stability air spring according to claim 3, characterized in that: An annular groove (62) is provided on the outer wall of the lower end of the piston (6), and the upper end of the bladder skin (5) is inserted into the annular groove (62). The upper end of the bladder skin (5) is pressed against the side wall of the annular groove (62) through an upper buckling ring (51).

7. The repairable high stability air spring according to claim 3, characterized in that: An annular step (43) is provided on the outer wall of the upper end of the lower end cover (4), the lower end of the bladder skin (5) is inserted into the annular step (43), and the lower end of the bladder skin (5) is pressed against the side wall of the annular step (43) through a lower buckling ring (52).

8. The repairable high stability air spring according to claim 7, characterized in that: The outer part of the lower buckle ring (52) is sleeved with a lining ring (53), and the lining ring (53) abuts against the outer bottom of the bladder skin (5) to support the bladder skin (5).

9. The repairable high stability air spring according to claim 3, characterized in that: An aluminum sleeve (54) is sleeved on the outer peripheral wall of the bladder skin (5), and a bladder skin support ring (55) is arranged on the inner side of the bladder skin (5). The middle part of the bladder skin (5) is pressed against the inner wall of the aluminum sleeve (54) through the bladder skin support ring (55).

10. The repairable high stability air spring according to claim 4, characterized in that: The maintainable high-stability air spring also includes a dust cover (10), the upper end of the dust cover (10) is fixed to the outer edge of the upper end cover (8), the lower end of the dust cover (10) is fixed to the outer edge of the lower end cover (4), and the dust cover (10) is sleeved on the outside of the bladder skin (5) and is gap-fitted with the bladder skin (5).

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