Long-stroke multi-cavity air spring

Abstract

The invention relates to the technical field of vehicles, in particular to a long-stroke multi-cavity air spring which comprises a shock absorber cylinder barrel, a shock absorber piston rod, a linear bearing, a first air spring, an air spring connector and a second air spring. The air spring connector drives the linear bearing to move rightwards, in the process that the linear bearing moves rightwards, the air spring connector moves rightwards to compress the second air spring, and when the second air spring is inflated, due to the fact that the end of the second air spring is fixedly installed outside a cylinder barrel of the shock absorber, the second air spring can be inflated, and the second air spring can be compressed. Therefore, the first air spring is compressed through cooperation of the air connector and the linear bearing, and adjustment of different rigidities and strokes of the device under the long stroke is achieved through balance and adjustment of the first air spring and the second air spring.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a long-stroke multi-chamber air spring. Background Art

[0002] Air suspension is a kind of automobile suspension system, which usually includes air springs, air pressure regulators and compressors. In air suspension, air springs can be divided into single-chamber air springs and multi-chamber air springs. Among them, single-chamber air springs are often only equipped with one main chamber, while multi-chamber air springs are composed of a main chamber and at least one sub-chamber. Taking the double-chamber air spring as an example, in the low stiffness state, the main chamber and the sub-chamber are connected for operation; in the high stiffness state, the main chamber and the sub-chamber are separated, and only the main chamber is used for operation. Different from the single-chamber air spring, the multi-chamber air spring realizes multi-level adjustment of the spring stiffness, which can make trade-offs and control between smoothness and handling stability.

[0003] However, in traditional multi-chamber air spring systems, once the structure is determined, its maximum stroke cannot be changed, which limits the adaptability and flexibility of the air spring. Summary of the invention

[0004] The purpose of the present invention is to provide a long-stroke multi-chamber air spring to solve the problem that in a traditional multi-chamber air spring system, once the structure is determined, its maximum stroke cannot be changed, which limits the adaptability and flexibility of the air spring.

[0005] To achieve the above-mentioned objectives, the present invention provides a long-stroke multi-chamber air spring, which includes a shock absorber cylinder, a shock absorber piston rod, a linear bearing, a first air spring, an air spring connector and a second air spring, the shock absorber cylinder being slidably provided with the shock absorber piston rod, the outside of the shock absorber cylinder being provided with the linear bearing, the outside of the linear bearing being provided with the air spring connector, one end of the first air spring being fixed to an end of the shock absorber piston rod away from the shock absorber cylinder, the end of the air spring connector being embedded in a cavity at the other end of the first air spring, one end of the second air spring being fixedly connected to an end of the shock absorber cylinder away from the shock absorber piston rod, the end of the air spring connector being embedded in a cavity at the other end of the second air spring.

[0006] An air spring support plate is arranged outside the end of the shock absorber cylinder away from the shock absorber piston rod, and an end of the second air spring away from the air spring connector is fixedly connected to the air spring support plate.

[0007] In which, the first travel segment and the second travel segment are respectively provided at the two ends of the outside of the air spring connector, the first air spring is provided with a first deformation segment at one end close to the air spring connector, and the first deformation segment is adapted to the first travel segment, and the second air spring is provided with a second deformation segment at one end close to the air spring connector, and the second deformation segment is adapted to the second travel segment.

[0008] Wherein, the first travel section and the second travel section are both provided with a limiting protrusion at the ends facing each other.

[0009] A long-stroke multi-chamber air spring of the present invention comprises a shock absorber cylinder, a shock absorber piston rod, a linear bearing, a first air spring, an air spring connector and a second air spring. The first air spring and the second air spring can independently adjust the air pressure. When the first air spring is inflated, the first air spring drives the shock absorber piston rod to move to the left while driving the linear bearing to move to the right through the air spring connector. During the movement of the linear bearing to the right, the air spring connector moves to the right to compress the second air spring. When the second air spring is inflated, since the end of the second air spring is fixedly mounted on the outside of the shock absorber cylinder, the first air spring is compressed through the cooperation of the air connector and the linear bearing. By balancing and adjusting the first air spring and the second air spring, the adjustment of different stiffness and stroke of the device under long stroke is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a schematic structural diagram of the long-stroke multi-chamber air spring provided by the present invention.

[0012] 1- shock absorber cylinder, 2- shock absorber piston rod, 3- linear bearing, 4- first air spring, 5- air spring connector, 6- second air spring, 7- air spring support plate, 8- first stroke section, 9- second stroke section, 10- first deformation section, 11- second deformation section, 12- limiting protrusion. DETAILED DESCRIPTION

[0013] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0014] See also Figure 1 The present invention provides a long-stroke multi-chamber air spring, which comprises a shock absorber cylinder 1, a shock absorber piston rod 2, a linear bearing 3, a first air spring 4, an air spring connector 5 and a second air spring 6. The shock absorber piston rod 2 is slidably arranged inside the shock absorber cylinder 1, the linear bearing 3 is arranged outside the shock absorber cylinder 1, and the air spring connector 5 is arranged outside the linear bearing 3. One end of the first air spring 4 is fixed to the end of the shock absorber piston rod 2 away from the shock absorber cylinder 1, and the end of the air spring connector 5 is embedded in the cavity of the other end of the first air spring 4. One end of the second air spring 6 is fixedly connected to the end of the shock absorber cylinder 1 away from the shock absorber piston rod 2, and the air spring connector 5 is embedded in the cavity of the other end of the second air spring 6 away from the first air spring 4.

[0015] In this embodiment, the air pressure of the first air spring 4 and the second air spring 6 can be adjusted independently. When the first air spring 4 is inflated, the first air spring 4 drives the shock absorber piston rod 2 to move to the left, and drives the linear bearing 3 to move to the right through the air spring connector 5. During the movement of the linear bearing 3 to the right, the air spring connector 5 moves to the right to compress the second air spring 6. When the second air spring 6 is inflated, since the end of the second air spring 6 is fixedly installed on the outside of the shock absorber cylinder 1, the first air spring 4 is compressed through the cooperation of the air connector and the linear bearing 3. By balancing and adjusting the first air spring 4 and the second air spring 6, the adjustment of different stiffness and stroke of the device under long stroke is achieved.

[0016] Furthermore, an air spring support plate 7 is provided outside the end of the shock absorber cylinder 1 away from the shock absorber piston rod 2 , and one end of the second air spring 6 away from the air spring connector 5 is fixedly connected to the air spring support plate 7 .

[0017] In this embodiment, by disposing the air spring support plate 7 , one end of the second air spring 6 away from the air spring connector 5 is fixedly mounted on the outside of the shock absorber cylinder 1 .

[0018] Furthermore, the first stroke segment 8 and the second stroke segment 9 are respectively provided at the two ends of the outside of the air spring connector 5, the first air spring 4 is provided with a first deformation segment 10 at one end close to the air spring connector 5, and the first deformation segment 10 is adapted to the first stroke segment 8, and the second air spring 6 is provided with a second deformation segment 11 at one end close to the air spring connector 5, and the second deformation segment 11 is adapted to the second stroke segment 9.

[0019] Furthermore, a limiting protrusion 12 is provided at the facing ends of the first travel section 8 and the second travel section 9 .

[0020] In this embodiment, the reset state of the first air spring 4 and the second air spring 6 is limited by the provision of the limiting protrusion 12 .

[0021] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A long-stroke multi-chamber air spring, characterized in that: It includes a shock absorber cylinder, a shock absorber piston rod, a linear bearing, a first air spring, an air spring connector and a second air spring, the shock absorber cylinder being slidably provided with the shock absorber piston rod, the outside of the shock absorber cylinder being provided with the linear bearing, the outside of the linear bearing being provided with the air spring connector, one end of the first air spring being fixed to an end of the shock absorber piston rod away from the shock absorber cylinder, the other end of the first air spring having an end of the air spring connector embedded in a cavity, one end of the second air spring being fixedly connected to an end of the shock absorber cylinder away from the shock absorber piston rod, the other end of the second air spring having an end of the air spring connector embedded in a cavity away from the first air spring.

2. The long-stroke multi-chamber air spring according to claim 1, characterized in that: An air spring support plate is arranged outside the end of the shock absorber cylinder away from the shock absorber piston rod, and one end of the second air spring away from the air spring connector is fixedly connected to the air spring support plate.

3. The long-stroke multi-chamber air spring according to claim 2, characterized in that: The first travel section and the second travel section are respectively arranged at the two ends of the outside of the air spring connector. The first air spring is provided with a first deformation section at one end close to the air spring connector, and the first deformation section is adapted to the first travel section. The second air spring is provided with a second deformation section at one end close to the air spring connector, and the second deformation section is adapted to the second travel section.

4. The long-stroke multi-chamber air spring according to claim 3, characterized in that: The first travel section and the second travel section have opposing ends each provided with a limiting protrusion.

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