CN216975636U - Air spring - Google Patents

Abstract

The utility model discloses an air spring, which comprises a base; a piston; the first capsule body is connected between the base and the piston, and a closed air cavity is defined among the base, the piston and the first capsule body; the second bag bodies are positioned in the air cavity, each second bag body is connected with the base or the piston to define a first sub-cavity, and the parts of the air cavity except all the first sub-cavities are second sub-cavities; the air spring is provided with a communicated first air port corresponding to each first sub-cavity, and the first air port is arranged on a base or a piston used for limiting the first sub-cavity; the air spring is also provided with a second air port communicated with the second sub-cavity, and the second air port is arranged on the base or the piston. The medium for adjusting the volume of the first sub-cavity and the second sub-cavity is gas, a branch distribution valve and an existing air spring shared air source can be added, the volume adjusting equipment does not need to be additionally arranged, the occupied space of the air spring after arrangement is reduced, and meanwhile the layout difficulty is reduced.

Description

Air spring

Technical Field

The utility model relates to the technical field of springs, in particular to an air spring.

Background

An air spring is a spring whose elastic action is achieved by utilizing the compressibility of gas by charging compressed air into a sealed container. The air spring is widely applied to air suspension of a vehicle, and the rigidity characteristic of the air spring is adjusted by adjusting the air pressure of the air chamber, so that the riding comfort of the vehicle is improved.

In the related art, for example, in an air spring with an additional air chamber disclosed in patent application No. CN201220171291.7, the additional air chamber is separated from the metal cylinder by a main air chamber rubber air bag, and the volume of the additional air chamber is adjusted by adjusting the position of a piston below the main air chamber rubber air bag in the metal cylinder, thereby adjusting the stiffness of the air spring.

However, this method requires passive adjustment of the position of the piston, which is inconvenient for active adjustment of the volume of the additional air chamber, and tends to cause hysteresis in the stiffness adjustment. Meanwhile, other related devices need to be additionally arranged to be matched and adjusted in some related technologies, so that arrangement troubles are brought to the whole vehicle, and the design layout of the whole vehicle is inconvenient.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the air spring provided by the utility model is convenient for adjusting the rigidity of the spring and is convenient for the design layout of the whole vehicle.

According to the embodiment of the application, the air spring comprises: a base; a piston movable relative to the base; the first capsule is connected between the base and the piston, and a closed air cavity is defined among the base, the piston and the first capsule; the second bag body is positioned in the air cavity, at least one second bag body is arranged, the second bag body is connected with the base to define a first sub-cavity, or the second bag body is connected with the piston to define the first sub-cavity, and the part of the air cavity except all the first sub-cavities is a second sub-cavity; the air spring is provided with a communicated first air port corresponding to each first sub-cavity, and the first air port is arranged on the base or the piston for limiting the first sub-cavity; the air spring is also provided with a second air port communicated with the second sub-cavity, and the second air port is arranged on the base or the piston; the second air port is used for adjusting the air content in the second sub-cavity so as to adjust the telescopic amount of the air spring, and the first air port is used for adjusting the air content in the first sub-cavity so as to adjust the rigidity of the air spring.

According to the air spring of the embodiment of the application, the second sub-cavity is ventilated through the second air port and used for realizing the function of the air spring. Aerify the volume that exhaust can continuous adjustment first sub-chamber to first sub-chamber through first gas port, the continuous change of first sub-chamber volume leads to the volume and the atmospheric pressure continuous change of second sub-chamber, and then utilizes the change of second sub-chamber volume and atmospheric pressure to realize the continuous adjustment of air spring rigidity to realize different rigidity and damping, full play air spring's performance.

The volume of the second sub-chamber can be adjusted through adjusting the air supply quantity of the second air port, the volume change of the second sub-chamber leads to the change of the telescopic quantity of the air spring, and then the height of the air spring is adjusted, and different working conditions are conveniently adapted.

The air spring does not need to be provided with an additional air chamber independently, occupies smaller space and is more convenient to arrange and install; meanwhile, the volume of the additional air chamber is not required to be changed by independently adjusting the position of the piston, and the operation is more convenient. The medium for adjusting the volume of the first sub-cavity and the second sub-cavity is gas, a branch distribution valve and an existing air spring shared air source can be added, the volume adjusting equipment does not need to be additionally arranged, the occupied space of the air spring after arrangement is reduced, and meanwhile the layout difficulty is reduced.

In some embodiments, the second bladder is connected to the piston, and the first and second gas ports are both provided on the piston. The piston reciprocates and bears the load through the relative base of the volume change of second subchamber, all sets up second utricule, first gas port and second gas port on the piston, makes things convenient for the overall arrangement setting of air bag in equipment, and air bag's installation is more simple and practical with the use.

In some embodiments, the piston comprises a piston end plate and a piston tube extending from one side of the piston end plate toward the base; the first balloon is tubular, one end of the first balloon is connected with the piston tube, and the other end of the first balloon is connected with the base. The piston pipe is sealed through the piston end plate and is connected with the base through the first tubular bag body to form a closed air cavity, so that the volume ratio of the air cavity in the air spring is increased while the piston supporting effect is guaranteed, and the rigidity and damping adjustment performance of the air spring are improved.

In some embodiments, the air spring further comprises: the contact overcoat is in the outer section of thick bamboo that protects of first bag, protect a section of thick bamboo edge the moving direction of piston extends the setting, it opens to protect a section of thick bamboo both ends, protect a pot head of section of thick bamboo the piston pipe outside and with the interval sets up between the piston pipe. Can carry on spacingly and protect first utricule through setting up a protecting section of thick bamboo, first utricule when the volume increases, the outer wall of first utricule can be attached on protecting the section of thick bamboo so that the volume of first utricule expands or contracts to the direction that the piston removed, guarantees that first utricule radially indeformable under the pressure effect, can avoid the exterior structure to rip first utricule simultaneously.

In some embodiments, the air spring further comprises: the first pressing ring is sleeved on the outer side or the inner side of the piston tube, and one end of the first capsule is clamped between the first pressing ring and the piston tube; the second pressing ring is sleeved on the base, and the other end of the first capsule is clamped between the second pressing ring and the base. The both ends of first utricule compress tightly respectively through first clamping ring and second clamping ring and fix on piston tube and base in order to press from both sides tight the sealing to the air cavity, have ensured the gas tightness of air cavity, also be convenient for dismantle and change first utricule through first clamping ring and second clamping ring.

In some specific embodiments, the first pressing ring and the second pressing ring are both sleeved outside the end portion of the first capsule, a first abutting ring and a second abutting ring are respectively formed at two ends of the first capsule, the first abutting ring abuts against one side of the first pressing ring, which is far away from the base, and the second abutting ring abuts against one side of the second pressing ring, which is far away from the piston. When the gas volume in the first capsule body is increased, the two ends of the first capsule body can generate force for breaking loose the first pressing ring and the second pressing ring. When one end of the first capsule is stretched towards the base from between the first pressing ring and the piston tube, the first abutting ring can be abutted between the outer wall of the first pressing ring and the outer wall of the piston tube, and the end of the first capsule is prevented from falling off from between the first pressing ring and the piston tube. Similarly, when the other end of the first capsule is stretched towards the piston tube from between the second pressing ring and the base, the second abutting ring can be abutted between the second pressing ring and the outer wall of the base, and the end of the first capsule is prevented from falling off from between the second pressing ring and the base. The risk that the first capsule breaks away from with piston pipe and base is further reduced, the security of air spring improves.

Further, the piston tube and the base are threaded at the portions contacting the first capsule. When the first capsule body is tightly pressed on the piston tube and the base, the first capsule body can be deformed into a thread groove of the thread, so that the contact area of the first capsule body at the joint of the piston tube and the base is increased, the friction force can be improved, and the risk that the first capsule body falls off is reduced; meanwhile, the threaded structure enables the path of gas to be longer, and the gas in the gas cavity is more difficult to exchange with the outside through the connecting parts at the two ends of the first capsule, so that the gas tightness of the gas cavity is improved.

In some embodiments, the air spring further comprises a third collar located within the first bladder and sandwiching the first bladder between the third collar and the retaining sleeve. Through the third clamping ring that sets up, can strut and press from both sides tightly the section of thick bamboo from inside with first utricule, when further reducing first utricule risk of droing, make first utricule keep the form of strutting, guarantee the effective volume of air cavity.

Furthermore, positioning convex hulls are respectively formed on the two axial sides of the protecting cylinder positioned on the third pressure ring. The third press ring is clamped between the two positioning convex hulls which are axially arranged so as to keep the position of the third press ring relative to the casing fixed, and the third press ring is prevented from sliding down along the inner wall of the casing to cause the loss of the effect of supporting the first capsule.

In some embodiments, the first capsule is sleeved on the base, the second pressing ring is sleeved on the outer side of the end portion of the first capsule, and the air spring further comprises a push ring sleeved on the outer side of the second pressing ring. The push ring that sets up can compress tightly the second clamping ring from the outside, further strengthens the effect that compresses tightly of second clamping ring to first utricule.

According to the air spring provided by the embodiment of the application, the piston further comprises a connecting ring, the connecting ring is connected to one side of the piston end plate far away from the piston tube, and the air spring further comprises: the bearing seat is connected to the connecting ring through the bearing. The bearing that sets up can be used for connecting external equipment, and the bearing passes through the bearing frame and the go-between is connected with the piston end plate to pass through the piston with the load and transmit the air cavity, the first subchamber can cushion the external equipment's of being connected load on the bearing, slows down the motion rigidity of piston under the external equipment load effect, adjusts external equipment's stability in real time.

In some embodiments, the air spring further includes a dust cover, the dust cover is sleeved outside the base, the piston and the first bag body, the dust cover extends along the moving direction of the piston, two ends of the dust cover are connected to the base and the piston, and at least a part of the dust cover is a bellows. The dust cover can play the effect of support protection to the air cavity, keeps apart air cavity and external environment, reduces the possibility that the dust gets into the air cavity, improves air spring's life.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram illustrating the structure of an air spring provided by an embodiment of the present application;

fig. 2 shows a partial schematic view of a connection between a first bladder and a piston provided in an embodiment of the present application;

fig. 3 illustrates a partial schematic view of a connection between a first bladder and a base provided in an embodiment of the present application;

FIG. 4 shows a schematic view of an air spring provided by an embodiment of the present application when deflated.

Reference numerals:

1000-air spring, the air spring,

10-a base, wherein the base is provided with a plurality of grooves,

20-piston, 201-piston end plate, 202-piston tube,

30 a-a first bladder, 30 b-a second bladder,

40 a-first subchamber, 40 b-second subchamber,

50 a-the first port, 50 b-the second port,

60-the part of the protective cylinder is protected,

70 a-a first press ring, 70 b-a second press ring, 70 c-a third press ring,

80 a-a first retaining ring, 80 b-a second retaining ring,

a 90-thread of the screw thread, wherein,

100-positioning the convex hull, namely positioning the convex hull,

110-a push ring is arranged on the upper surface of the body,

120-a connecting ring,

130-the bearing(s) are,

140-a bearing seat, wherein the bearing seat is provided with a plurality of bearing holes,

150-dust cover.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "thickness", "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

An air spring 1000 according to an embodiment of the present application is described below with reference to fig. 1-4, and includes a base 10, a piston 20, and a first bladder 30a, the piston 20 being movable relative to the base 10, the first bladder 30a being connected between the base 10 and the piston 20, the base 10, the piston 20, and the first bladder 30a defining a closed air chamber therebetween.

As shown in fig. 1, air spring 1000 further includes a second bladder 30b, with second bladder 30b being located within the air chamber, with at least one of second bladder 30 b. Each second bladder 30b may be associated with the base 10 and each second bladder 30b may also be associated with the piston 20. When second bladder 30b is attached to base 10, second bladder 30b and base 10 define a first subchamber 40a therebetween. When second bladder 30b is connected to piston 20, first subchamber 40a is defined between second bladder 30b and piston 20. The portion of the air cavity other than all of first subchambers 40a is second subchamber 40 b. The second sub-cavity 40b is communicated with the second air port 50b and is used for realizing the function of the air spring 1000, and the first sub-cavity 40a is used for changing the volume of the first sub-cavity 40a to adjust the volume of the second sub-cavity 40b, so that the rigidity adjustment of the air spring 1000 is realized.

Wherein, air spring 1000 is provided with a first communicating air port 50a corresponding to each first sub-chamber 40a, and first air port 50a is provided on base 10 or piston 20 for defining first sub-chamber 40 a. Air spring 1000 is further provided with a second air port 50b in communication with second subchamber 40b, second air port 50b being provided in base 10 or piston 20. Second gas port 50b is used to adjust the amount of gas contained within second subchamber 40b to adjust the amount of movement of air spring 1000 and first gas port 50a is used to adjust the amount of gas contained within first subchamber 40a to adjust the stiffness of air spring 1000.

The volume of first sub-cavity 40a can be continuously adjusted by inflating and exhausting air to first sub-cavity 40a through first air port 50a, the continuous change of the volume of first sub-cavity 40a leads to the continuous change of the volume and air pressure of second sub-cavity 40b, and then the change of the air pressure of second sub-cavity 40b is utilized to realize the continuous adjustment of the rigidity of air spring 1000, so as to realize different rigidities and damping, and fully exert the performance of air spring 1000.

The volume of the second sub-cavity 40b can be adjusted by adjusting the air supply quantity of the second air port 50b, and the volume change of the second sub-cavity 40b causes the movement quantity change of the air spring 1000, so that the height of the air spring 1000 is adjusted, and the air spring is convenient to adapt to different working conditions.

Compared with the prior art, the air spring 1000 does not need to be provided with an additional air chamber independently, occupies smaller space and is more convenient to arrange and install. Meanwhile, the volume of the additional air chamber is not required to be changed by independently adjusting the position of the piston 20, and the operation is more convenient.

The media for adjusting the volume of the first sub-cavity 40a and the second sub-cavity 40b are all gas, a branch distribution valve and an existing air spring 1000 share an air source can be added, extra equipment for adjusting the volume does not need to be arranged, the occupied space of the air spring 1000 after arrangement is reduced, and meanwhile the layout difficulty is reduced.

In some embodiments, the air spring 1000 of the present application is suitable for transportation vehicles such as commercial automobiles, buses, rail vehicles, etc., and can be used as an automobile suspension or other shock absorption devices to improve the comfort level of the vehicles during driving. Further, the present application may include a gas source connected to first gas port 50a and second gas port 50b, and a controller for controlling the gas source to charge and discharge gas into first subchamber 40a and second subchamber 40 b.

The controller can adopt an electronic control unit for controlling the electric system of the vehicle body, and the air source can adopt an air compressor or an air storage bottle arranged on the vehicle. The controller can set different working condition modes and program the working condition modes to be stored in the storage, a passenger can select the working condition modes through a terminal, and the controller adjusts the gas injection quantity of the gas source to the first sub-cavity 40a according to the selection result, so that the volume of the second sub-cavity 40b is changed, the rigidity characteristic of the air spring 1000 is further changed, and the comfort of the automobile in low-speed running and the controllability of the automobile in high-speed running are improved. In addition, the controller can also adjust the air supply amount of the air source to the second sub-cavity 40b according to different working condition modes, so as to adjust the overall height of the air spring 1000, and improve the passing performance of the automobile during running.

Meanwhile, the air spring 1000 is light in structure and small in occupied space, and the first sub-cavity 40a and the second sub-cavity 40b can be adapted to share the same air source, so that the difficulty of the structural layout of the vehicle is reduced.

In some embodiments, the first and second bladders 30a and 30b may be made of vulcanized rubber including polyamide fabric, which has good elasticity and good anti-cracking performance, and the impact force generated when the bladders are inflated can be reduced by vulcanization.

In some embodiments, as shown in fig. 1, the second bladder 30b is connected to the piston 20, and the first and second gas ports 50a and 50b are provided in the piston 20. Piston 20 reciprocates and bears the load through the volume change of second subchamber 40b relative base 10, all sets up second utricule 30b, first gas port 50a and second gas port 50b on piston 20, makes things convenient for the overall arrangement setting of air bag in the equipment, and the installation and the use of air bag are more simple and practical.

Further, where a plurality of second bladders 30b are provided, each second bladder 30b is provided with a corresponding first port 50 a.

In some embodiments, the piston 20 includes a piston end plate 201 and a piston tube 202, and the piston tube 202 is disposed to extend from one side of the piston end plate 201 toward the base 10. The first bladder 30a is tubular, with one end of the first bladder 30a connected to the plunger tube 202 and the other end of the first bladder 30a connected to the base 10.

The piston tube 202 is sealed by the piston end plate 201 and is connected with the base 10 by the tubular first bag body 30a to form a closed air cavity, so that the supporting effect of the piston 20 is guaranteed, the volume ratio of the air cavity in the air spring 1000 is increased, and the rigidity and the damping adjustment performance of the air spring 1000 are improved.

Alternatively, the second bladder 30b may be secured within the piston tube 202 by a snap, band or flange connection, or the second bladder 30b may be secured to the side of the piston end plate 201 adjacent the base 10. The first and second ports 50a and 50b may be both provided in the piston end plate 201 and connected to an external gas source via a vent tube. When the second capsule 30b is provided with a plurality of second capsules, a first air port 50a can be arranged on the piston end plate 201, and a plurality of branch passages communicated with the first air port 50a and the second capsule 30b are arranged in the piston end plate 201, so that the complexity of connecting pipelines with an air source is reduced.

In some embodiments, as shown in fig. 1, the air spring 1000 further includes a casing 60 contacting and covering the first bladder 30a, the casing 60 extending along the moving direction of the piston 20, the casing 60 being open at both ends, and one end of the casing 60 covering the outside of the piston tube 202 and spaced apart from the piston tube 202.

The arrangement of the protective sleeve 60 can limit and protect the first capsule 30a, when the volume of the first capsule 30a is increased, the outer wall of the first capsule 30a can be attached to the protective sleeve 60, so that the first capsule 30a is ensured not to deform radially under the action of pressure, the radial expansion of the first capsule 30a is limited, the volume of the first capsule 30a is expanded or contracted towards the moving direction of the piston 20, and meanwhile, the first capsule 30a can be prevented from being scratched by an external structure.

In some embodiments, the material of the casing 60 may be lead. Of course, the shield tube 60 made of aluminum, iron, copper, or the like may be used in the air spring 1000 of the present application.

In some embodiments, as shown in fig. 1-3, air spring 1000 further includes: a first compression ring 70a and a second compression ring 70b, the first compression ring 70a being fitted around the outside or inside of the plunger tube 202 and one end of the first capsule 30a being sandwiched between the first compression ring 70a and the plunger tube 202. The second collar 70b fits over the base 10 and the other end of the first capsule 30a is sandwiched between the second collar 70b and the base 10.

The two ends of the first capsule 30a are respectively pressed and fixed on the piston tube 202 and the base 10 through the first pressing ring 70a and the second pressing ring 70b to clamp and seal the air cavity, so that the air tightness of the air cavity is guaranteed, and the first capsule 30a is convenient to detach and replace through the first pressing ring 70a and the second pressing ring 70 b.

In some embodiments, the first pressing ring 70a and the second pressing ring 70b may be circular sealing flanges with adjusting openings, adjusting bolts are disposed at the adjusting openings for adjusting the size of the openings, the first pressing ring 70a and the second pressing ring 70b are respectively sleeved on the piston tube 202 and the base 10, the size of the adjusting openings is reduced by the adjusting bolts, and the first pressing ring 70a and the second pressing ring 70b clamp and fix two ends of the first capsule 30a to the piston tube 202 and the base 10, thereby sealing the air cavities.

In other embodiments, the plunger tube 202 and the base 10 may be provided with sockets for engaging with the first and second pressing rings 70a and 70b, the two ends of the first capsule 30a are respectively sleeved on the first and second pressing rings 70a and 70b, the first and second pressing rings 70a and 70b are respectively inserted into the sockets of the plunger tube 202 and the base 10, a special tool is used to press the sockets from the outside along the circumferential direction of the sockets, so that the sockets together with the first and second pressing rings 70a and 70b are recessed and deformed to compress the sealing sections of the sockets, and the first capsule 30a is tightly sealed with the plunger tube 202 and the base 10.

In some embodiments, as shown in fig. 2 and 3, the first pressing ring 70a and the second pressing ring 70b are both sleeved outside the end portion of the first capsule 30a, a first abutting ring 80a and a second abutting ring 80b are respectively formed at two ends of the first capsule 30a, the first abutting ring 80a abuts against a side of the first pressing ring 70a far away from the base 10, and the second abutting ring 80b abuts against a side of the second pressing ring 70b far away from the piston 20.

As the gas volume within the first capsule 30a increases, the two ends of the first capsule 30a will experience a force that breaks free the first and second compression rings 70a, 70 b. When one end of the first capsule 30a is stretched towards the base 10 from between the first compression ring 70a and the plunger tube 202, the first abutment ring 80a may abut between the first compression ring 70a and the outer wall of the plunger tube 202, preventing the end of the first capsule 30a from falling out from between the first compression ring 70a and the plunger tube 202.

Similarly, when the other end of the first capsule 30a is stretched from between the second press ring 70b and the base 10 to the plunger tube 202, the second pressing ring 80b can be stopped between the second press ring 70b and the outer wall of the base 10, thereby preventing the end of the first capsule 30a from falling off from between the second press ring 70b and the base 10. Further reducing the risk of the first bladder 30a becoming detached from the piston tube 202 and base 10 improves the safety of the air spring 1000.

Specifically, the first abutting ring 80a and the second abutting ring 80b are both arranged along the circumferential direction of the openings at the two ends of the first capsule 30a, the thickness of the first abutting ring 80a and the thickness of the second abutting ring 80b are greater than the thickness of the openings at the two ends of the first capsule 30a, when the first pressing ring 70a and the second pressing ring 70b press the two ends of the first capsule 30a against the piston tube 202 and the base 10, the first abutting ring 80a cannot pass through the gap between the first pressing ring 70a and the piston tube 202 due to the greater thickness, and similarly, the second abutting ring 80b cannot pass through the gap between the first pressing ring 70a and the piston tube 202. When the first capsule 30a is filled with gas or the pressure is increased, the first pressing ring 80a and the second pressing ring 80b at the two ends of the first capsule 30a respectively abut against the first pressing ring 70a and the second pressing ring 70b, and the two ends of the first capsule 30a are prevented from being separated from the first pressing ring 70a and the second pressing ring 70b, so that the fastening degree of the connection between the first capsule 30a and the piston 20 as well as the base 10 is further improved.

Further, the first retaining ring 80a and the second retaining ring 80b may be circular rings circumferentially disposed along openings at two ends of the first bladder 30 a. Of course, a plurality of arc-shaped abutting blocks may be circumferentially disposed along the openings at the two ends of the first bag body 30a, and at this time, the first abutting ring 80a and the second abutting ring 80b are changed into an interrupted circular ring shape formed by the plurality of arc-shaped abutting blocks.

In some embodiments, as shown in fig. 2 and 3, the plunger tube 202, and the portion of the base 10 that contacts the first bladder 30a, are formed with threads 90. When the first capsule 30a is pressed against the plunger tube 202 and the base 10, because the first capsule 30a is of an elastic rubber structure, the first capsule 30a can be deformed into the groove of the thread 90, so that the contact area of the joint of the first capsule 30a and the plunger tube 202 as well as the base 10 is increased, the friction force between the first capsule 30a and the plunger tube 202 as well as the base 10 is also increased, and the risk that the first capsule 30a falls off can be reduced.

Simultaneously, the screw thread 90 structure has multiple spiral line, and gas need pass through longer route when passing through the screw thread 90 structure, and first utricule 30a still can deform to the spiral line simultaneously, and the gas in the air cavity is more difficult to exchange with the outside through the junction at first utricule 30a both ends, has improved the gas tightness of air cavity.

In some embodiments, as shown in fig. 1, the air spring 1000 further includes a third compression ring 70c, the third compression ring 70c being positioned within the first bladder 30a and sandwiching the first bladder 30a between the third compression ring 70c and the grommet 60. Through the third press ring 70c that sets up, can strut and press from both sides tight the protecting section of thick bamboo 60 with first utricule 30a from inside, when further reducing first utricule 30a risk of droing, make first utricule 30a keep the form of strutting, guarantee the effective volume of air cavity.

Further, as shown in fig. 1, the casing 60 is formed with positioning convex hulls 100 on both sides in the axial direction of the third pressure ring 70 c. The third pressing ring 70c is interposed between the two positioning protrusions 100 arranged in the axial direction, so as to limit the third pressing ring 70c from sliding up and down relative to the casing 60, so as to keep the position of the third pressing ring 70c relative to the casing 60 fixed, and avoid the third pressing ring 70c from sliding down and up along the inner wall of the casing 60 to lose the function of supporting the first capsule 30 a.

Alternatively, the third pressure ring 70c may have air holes penetrating therethrough, and the air in the upper space and the lower space of the third pressure ring 70c may be exchanged through the air holes.

In some embodiments of the present application, as shown in fig. 1, the first bladder 30a is sleeved on the base 10, the second compression ring 70b is sleeved outside the end of the first bladder 30a, and the air spring 1000 further comprises a push ring 110 sleeved outside the second compression ring 70 b. The push ring 110 is arranged to compress the second compression ring 70b from the outside, further enhancing the compression effect of the second compression ring 70b on the first balloon 30 a.

Optionally, as shown in fig. 3, one side of the push ring 110 is attached to the lower press ring, and the other side of the push ring 110 is curved and abuts against the sidewall of the base 10, and a concave arc-shaped groove is formed between the curved side of the push ring 110 and the sidewall of the base 10. After the first capsule 30a is inflated and expanded, the lower part of the first capsule 30a can be attached to the surface of the structure near the base 10 and external thrust is applied to the attached surface, under the condition, the first capsule 30a is attached to the arc-shaped groove along the shape of the arc-shaped groove, and along with the gradual increase of the air pressure in the first capsule 30a, the part of the first capsule 30a attached to the inner part of the arc-shaped groove can apply the external thrust to the arc-shaped groove, the external thrust at the moment is applied to the push ring 110 and is transmitted to the second press ring 70b, so that the pressing effect of the second press ring 70b is stronger, the clamping effect of the joint of the first capsule 30a is enhanced through the outward expansion force of the first capsule 30a, and the self-locking effect is achieved.

In some embodiments, as shown in fig. 1, the piston 20 further includes a connecting ring 120, the connecting ring 120 is connected to a side of the piston end plate 201 away from the piston tube 202, and the air spring 1000 further includes: a bearing 130, a bearing seat 140, the bearing seat 140 is connected to the connection ring 120 through the bearing 130. The bearing 130 is arranged to be connected with external equipment, the bearing 130 is connected with the piston end plate 201 through the bearing seat 140 and the connecting ring 120, and transmits the load to the air cavity through the piston 20, the first sub-cavity 40a can buffer the load of the external equipment connected to the bearing 130, the movement rigidity of the piston 20 under the action of the load of the external equipment is reduced, and the stability of the external equipment is adjusted in real time.

In some embodiments, as shown in fig. 1, the air spring 1000 further includes a dust cover 150, the dust cover 150 is sleeved outside the base 10, the piston 20, and the first capsule 30a, the dust cover 150 is disposed to extend along the moving direction of the piston 20, two ends of the dust cover 150 are connected to the base 10 and the piston 20, and at least a portion of the dust cover 150 is a bellows. The dust cover 150 can support and protect the air chamber, isolate the air chamber from the external environment, reduce the possibility of dust entering the air chamber, and prolong the service life of the air spring 1000.

Alternatively, the bellows portion of the dust cap 150 is a collapsible housing that is movable in the direction of movement of the piston 20, and the dust cap 150 is movable in unison with the piston 20.

Further, the dust cover 150 is covered outside the casing 60, and the outer wall of the casing 60 is connected and fixed to a part of the inner wall of the dust cover 150.

As shown in fig. 1 and 4, when the gas content in second sub-chamber 40b is low, air spring 1000 is shrunk as a whole, and the structure is shown in fig. 4. When the gas content in second sub-chamber 40b is high, air spring 1000 is stretched as a whole, and the structure is shown in fig. 1.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. An air spring, comprising:

a base;

a piston movable relative to the base;

the first capsule is connected between the base and the piston, and a closed air cavity is defined among the base, the piston and the first capsule;

the second bag body is positioned in the air cavity, the number of the second bag bodies is at least one, the second bag bodies are connected with the base to define first sub-cavities, or the second bag bodies are connected with the piston to define the first sub-cavities, and the parts of the air cavity except all the first sub-cavities are second sub-cavities; wherein, the first and the second end of the pipe are connected with each other,

the air spring is provided with a communicated first air port corresponding to each first sub-cavity, and the first air port is arranged on the base or the piston for limiting the first sub-cavity;

the air spring is also provided with a second air port communicated with the second sub-cavity, and the second air port is arranged on the base or the piston;

the second air port is used for adjusting the air content in the second sub-cavity so as to adjust the telescopic amount of the air spring, and the first air port is used for adjusting the air content in the first sub-cavity so as to adjust the rigidity of the air spring.

2. The air spring of claim 1, wherein said second bladder is connected to said piston, and said first and second air ports are both provided in said piston.

3. The air spring of claim 1, wherein said piston comprises: the piston tube extends from one side of the piston end plate to the base;

the first balloon is tubular, one end of the first balloon is connected with the piston tube, and the other end of the first balloon is connected with the base.

4. The air spring of claim 3, further comprising: the contact overcoat is in the outer section of thick bamboo that protects of first bag, it follows to protect the section of thick bamboo the moving direction of piston extends the setting, it opens to protect a both ends, protect an pot head of section of thick bamboo the piston pipe outside and with the interval sets up between the piston barrel.

5. The air spring of claim 3, further comprising:

the first pressing ring is sleeved on the outer side or the inner side of the piston tube, and one end of the first capsule body is clamped between the first pressing ring and the piston tube;

and the second pressing ring is sleeved on the base, and the other end of the first capsule is clamped between the second pressing ring and the base.

6. The air spring according to claim 5, wherein the first pressing ring and the second pressing ring are sleeved outside the end portion of the first bag body, a first abutting ring and a second abutting ring are respectively formed at two ends of the first bag body, the first abutting ring abuts against one side of the first pressing ring, which is far away from the base, and the second abutting ring abuts against one side of the second pressing ring, which is far away from the piston.

7. The air spring of claim 5, wherein the piston tube, the portion of the base in contact with the first bladder are each threaded.

8. The air spring of claim 4, further comprising: and the third pressing ring is positioned in the first capsule body, and the first capsule body is clamped between the third pressing ring and the pile casing.

9. The air spring according to claim 8, wherein positioning convex hulls are respectively formed on the casing at two axial sides of the third compression ring.

10. The air spring of claim 5, wherein said first bladder is sleeved on said base, said second compression ring is sleeved outside an end of said first bladder, and said air spring further comprises a push ring sleeved outside said second compression ring.

11. The air spring of claim 3, wherein said piston further comprises: a connecting ring connected to a side of the piston end plate remote from the piston tube, the air spring further comprising: the bearing seat is connected to the connecting ring through the bearing.

12. Air spring according to any of claims 1-11, further comprising: the dustproof cover is sleeved on the outer sides of the base, the piston and the first bag body, the dustproof cover extends along the moving direction of the piston, two ends of the dustproof cover are connected with the base and the piston, and at least one part of the dustproof cover is a corrugated pipe.

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