An air spring dust cover for enhancing the pressure-bearing capacity of an airbag

Abstract

The present invention discloses an air spring dust cover for enhancing the pressure-bearing capacity of an airbag, which relates to the technical field of automotive air suspensions. It includes a cover body and a metal reinforcing ring. The cover body is sleeved outside the airbag. One end of the cover body is fixedly connected to the base, and the other end of the cover body is fixedly connected to the piston seat. A large V-shaped guide body and a small V-shaped guide body for telescoping are formed on the cover body. The large V-shaped guide body and the small V-shaped guide body form a set of corrugated structures, and each set of corrugated structures is connected to each other. The height of the cover body changes with the change of the airbag height. The metal reinforcing ring is sleeved at the groove of the large V-shaped guide body of the cover body, and multiple metal reinforcing rings are used to enhance the pressure-bearing capacity of the airbag. The present invention can not only enhance the pressure-bearing capacity of the airbag, but also function as a dust cover, with a simple structure, reliable function, lower cost, reduced use and maintenance costs, and has a high application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive air suspension, and particularly to an air spring dust cover for enhancing the pressure-bearing capacity of an airbag. Background Art

[0002] In a passenger car air suspension system, an air spring replaces a traditional coil spring to achieve adjustable vehicle height, substantially consistent suspension natural frequency under different loads, and absorption and filtration of high-frequency road surface impacts, thereby improving the ride comfort and handling stability of the vehicle. The core component of the air spring is an airbag composed of a rubber material and a cord layer, and the airbag realizes the sealing, pressure-bearing, and stroke requirements for stretching and compression of the air spring. Since the air spring is a closed system during operation, as the air spring is compressed or stretched, the internal pressure of the air spring will increase or decrease. When the air spring is compressed to the stroke limit, the internal pressure generated is the maximum, and this pressure is called the maximum working pressure. The pressure-bearing capacity of the air spring airbag is expressed by the burst pressure, and it is required that the burst pressure of the airbag reaches a certain multiple of the maximum working pressure of the air spring. Therefore, improving the burst pressure of the airbag is of great significance for improving the safety of the air spring.

[0003] In the traditional structure, only the bladder skin is used as the pressure-bearing component, and it is difficult to improve the pressure-bearing capacity of the airbag. In the prior art, some increase the pressure-bearing capacity of the airbag by adding protective or restraining components made of iron, aluminum, etc. outside the bladder skin, and some also add a layer of dust cover outside the protective or restraining component to prevent the airbag from being damaged. However, the existing technologies generally have complex structures, and there needs to be a gap between the dust cover and the bladder skin, which makes the diameter of the dust cover too large and increases the interference risk between the air spring and the suspension components.

[0004] Therefore, it is necessary to design an integrated air spring dust cover with a simple structure that can not only enhance the pressure-bearing capacity of the airbag but also function as a dust cover. Summary of the Invention

[0005] In view of the above problems in the prior art, the present invention provides an integrated air spring dust cover with a simple structure that can not only enhance the pressure-bearing capacity of the airbag but also function as a dust cover, so as to overcome the above deficiencies of the prior art.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An air spring dust cover for enhancing the pressure-bearing capacity of an airbag, comprising a cover body and a metal reinforcing ring; the cover body is sleeved outside the airbag, one end of the cover body is fixedly connected to the base, the other end of the cover body is fixedly connected to the piston seat, and large V-shaped guiding bodies and small V-shaped guiding bodies for telescoping are formed on the cover body. The large V-shaped guiding bodies and the small V-shaped guiding bodies form a set of corrugated structures, and each set of corrugated structures is connected to each other. The height of the cover body changes with the change of the height of the airbag; the metal reinforcing ring is sleeved at the groove of the large V-shaped guiding body of the cover body, and the metal reinforcing rings are arranged at intervals along the radial direction of the cover body, and a plurality of the metal reinforcing rings are used to enhance the pressure-bearing capacity of the airbag.

[0008] Preferably, the cover body is a cylindrical corrugated structure made of thermoplastic vulcanizate (TPV).

[0009] Preferably, the large V-shaped guiding body is arranged closely against the airbag so that the metal reinforcing ring can enhance the pressure-bearing capacity of the airbag to the greatest extent.

[0010] Preferably, the large V-shaped guiding body includes a first inclined surface and a second inclined surface, the length of the first inclined surface is greater than the length of the second inclined surface, and the included angle between the first inclined surface and the second inclined surface is an acute angle.

[0011] Preferably, the small V-shaped guiding body includes a third inclined surface and a fourth inclined surface, the length of the third inclined surface is greater than the length of the fourth inclined surface, and the included angle between the third inclined surface and the fourth inclined surface is an acute angle.

[0012] Due to the adoption of the above technical solutions, compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. The cover body of the present invention is made of thermoplastic vulcanizate (TPV), and the cover body itself has elasticity, good telescopic performance, does not harden, does not crack, has good aging resistance, high density, and is durable;

[0014] 2. The metal reinforcing ring of the present invention is sleeved outside the cover body. Since the cover body is arranged closely against the airbag, and relying on the rigidity of the metal reinforcing ring and the flexibility of the cover body, the burst pressure of the air spring airbag is effectively improved;

[0015] 3. The present invention can not only enhance the pressure-bearing capacity of the airbag, but also function as a dust cover, belonging to an integrated air spring dust cover, which prolongs the service life of the air spring and reduces the use and maintenance costs;

[0016] 4. The structure of the present invention is simple, and it reduces the interference risk between the air spring and surrounding components, has reliable functions, lower costs, and has high application prospects. Description of the Drawings

[0017] Other objects and results of the present invention will become more apparent and easier to understand by referring to the following description in conjunction with the accompanying drawings. In the drawings:

[0018] Figure 1 is a schematic diagram of an air spring to which the present invention is applied;

[0019] Figure 2 is Figure 1 a partial enlarged view of part A in

[0020] The reference numerals therein include: cover body 1, metal reinforcing ring 2, airbag 3, base 4, piston seat 5, large V-shaped guide body 101, small V-shaped guide body 102, first inclined surface 1011, second inclined surface 1012, third inclined surface 1021, fourth inclined surface 1022. Detailed implementation manners

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope protected by the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" 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, and it can be the communication inside two elements. It should be pointed out that all the drawings are exemplary representations. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] Refer to Figure 1 、Figure 2 , a dust cover for an air spring that enhances the pressure-bearing capacity of the present invention, includes a cover body 1 and a metal reinforcing ring 2; the cover body 1 is a cylindrical corrugated structure made of thermoplastic vulcanizate (TPV), the cover body 1 is sleeved outside the airbag 3, the airbag 3 is filled with high-pressure gas, both ends of the airbag 3 are fixed to the base 4 and the piston seat 5 through clamping rings respectively, the airbag 3 is arranged inside the cover body 1, one end of the cover body 1 is tightly connected to the base 4 through its own elasticity, the other end of the cover body 1 is also tightly connected to the piston seat 5 through its own elasticity, the cover body 1 can also achieve the fixed connection of both ends of the cover body 1 through methods such as clamping rings, the height of the cover body 1 changes with the change of the height of the airbag 3, and the cover body 1 is fixedly connected to the metal reinforcing ring 2 during the forming process.

[0026] The cover body 1 is nearly cylindrical, and large V-shaped guiding bodies 101 and small V-shaped guiding bodies 102 for telescoping are formed on the cover body 1. The large V-shaped guiding body 101 includes a first inclined surface 1011 and a second inclined surface 1012, the small V-shaped guiding body 102 includes a third inclined surface 1021 and a fourth inclined surface 1022. The large V-shaped guiding body 101 and the small V-shaped guiding body 102 form a set of corrugated structures, and each set of corrugated structures is connected to each other, that is, the first inclined surface 1011 is connected to the second inclined surface 1012, the second inclined surface 1012 is connected to the fourth inclined surface 1022, and the fourth inclined surface 1022 is connected to the third inclined surface 1021, thus forming a set of corrugated structures. The length of the first inclined surface 1011 is greater than the length of the second inclined surface 1012, and the included angle between the first inclined surface 1011 and the second inclined surface 1012 is an acute angle under normal conditions. The length of the third inclined surface 1021 is greater than the length of the fourth inclined surface 1022, and the included angle between the third inclined surface 1021 and the fourth inclined surface 1022 is an acute angle under normal conditions; the large V-shaped guiding body 101 is arranged closely against the airbag 3, the metal reinforcing ring 2 is fixed at the groove of the large V-shaped guiding body 101 of the cover body 1, the metal reinforcing rings 2 are arranged at intervals along the radial direction of the cover body 1, and multiple metal reinforcing rings 2 are fixedly connected to the large V-shaped guiding body 101 closely against the airbag 3 to maximize the pressure-bearing capacity of the airbag 3.

[0027] The following will refer to Figure 1 , Figure 2 to illustrate the working principle of the present invention.

[0028] During the process that the cover body 1 is stretched and compressed along with the movement of the air spring assembly, the large V-shaped guide body 101 of the cover body 1 guides the metal reinforcing ring 2. As the airbag 3 rolls and elongates, the outer wall of the airbag 3 presses against the inner wall of the cover body 1. At this time, the metal reinforcing ring 2 will play a role in radially restricting the airbag 3. Since the pressure of the high-pressure gas filled in the airbag 3 acting on the outer wall of the airbag 3 is outward, the metal reinforcing ring 2 will play a role in radially restricting the airbag 3, that is, it resists the acting force of the high-pressure gas filled in the airbag 3. Furthermore, relying on the rigidity of the metal reinforcing ring 2 and the flexibility of the cover body 1, the pressure-bearing capacity of the airbag 3 is strengthened; since the inner side of the cover body 1 is closely attached to the airbag 3, there is no longer a large gap between the cover body 1 and the airbag 3, so that the outer diameter of the cover body 1 does not have to be too large, and the interference risk between the air spring assembly and the surrounding components is also reduced.

[0029] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An air spring dust cover for enhancing the pressure-bearing capacity of an airbag, characterized in that, It includes a cover body and a metal reinforcing ring; the cover body is sleeved outside the airbag, one end of the cover body is fixedly connected to the base, the other end of the cover body is fixedly connected to the piston seat, and large V-shaped guides and small V-shaped guides for telescoping are formed on the cover body. The large V-shaped guides and the small V-shaped guides constitute a set of corrugated structures, and each set of corrugated structures is connected to each other. The height of the cover body changes with the change of the height of the airbag; the metal reinforcing ring is sleeved at the groove of the large V-shaped guide of the cover body, and the metal reinforcing rings are arranged at intervals along the radial direction of the cover body. Multiple metal reinforcing rings are used to strengthen the pressure-bearing capacity of the airbag; the cover body is a cylindrical corrugated structure made of thermoplastic vulcanizate (TPV). The large V-shaped guide is closely attached to the airbag so that the metal reinforcing ring can strengthen the pressure-bearing capacity of the airbag to the greatest extent. The large V-shaped guide includes a first inclined surface and a second inclined surface. The length of the first inclined surface is greater than that of the second inclined surface, and the included angle between the first inclined surface and the second inclined surface is an acute angle. The small V-shaped guide includes a third inclined surface and a fourth inclined surface. The length of the third inclined surface is greater than that of the fourth inclined surface, and the included angle between the third inclined surface and the fourth inclined surface is an acute angle.

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