Connecting support sealing structure on air spring

Abstract

The utility model belongs to the technical field of automobile damping devices, and particularly relates to an air spring upper connecting support sealing structure which comprises an upper connecting support, top rubber and a sealing cover, at least two sealing protrusions are integrally arranged on the maximum circumference of the top rubber, the sealing protrusions form an annular sealing ring, and the sealing ring is connected with the upper connecting support. The two sealing protrusions are arranged at intervals along the axis of the top rubber, when the sealing cover presses and fixes the top rubber into a mounting hole of the upper connecting support, the lower end of the sealing cover abuts against one of the sealing protrusions, and the peripheral faces of the sealing protrusions abut against the side wall of the mounting hole. The upper connecting support sealing structure is used for solving the technical problems that an existing upper connecting support sealing structure for the air spring is difficult to assemble and complex in process.

Description

Technical Field

[0001] The utility model belongs to the technical field of automotive shock absorption devices, and particularly relates to a connecting support sealing structure on an air spring. Background Art

[0002] An air spring is a spring made using the compressibility of air in a sealed container. An air spring is an industrial accessory that can perform functions such as support, buffering, braking, height adjustment, and angle adjustment, and is widely used in self-adjusting air suspensions for commercial vehicles, buses, rail vehicles, machinery and equipment, and building bases.

[0003] Currently, the sealing structure for the upper connection support of the air spring assembly is a sealing cover 4' in cooperation with an O-ring 2'. The top rubber 3' is assembled into the mounting hole of the upper connection support 1', and sealing is achieved through the O-ring. Such a sealing structure has the following disadvantages:

[0004] (1) During assembly, the O-ring 2' needs to be assembled into the O-ring groove of the sealing cover 4' first, adding an assembly process.

[0005] (2) The assembly quality of the O-ring 2' is not easy to control, and it is difficult to prevent errors during the process.

[0006] (3) Oil needs to be applied during the assembly process, which causes oil pollution to the production line.

[0007] (4) The O-ring 2' is easily damaged during the assembly process and cannot be effectively identified.

[0008] Therefore, there is an urgent need for a new sealing structure to solve the technical problems of complicated and difficult assembly steps mentioned above. Content of the Utility Model

[0009] Aiming at the deficiencies in the prior art, the purpose of the utility model is to provide a connecting support sealing structure on an air spring, which is used to solve the technical problems of difficult assembly and complicated process existing in the current sealing structure for the upper connection support of the air spring.

[0010] To achieve the above purpose, the technical solution of the utility model is: a connecting support sealing structure on an air spring, the sealing structure includes an upper connection support, a top rubber, and a sealing cover. At least two sealing protrusions are integrally arranged at the largest circumference of the top rubber, and the sealing protrusions form an annular sealing ring. The two sealing protrusions are arranged at intervals along the axis of the top rubber. When the sealing cover presses the top rubber into the mounting hole of the upper connection support and fixes it, the lower end of the sealing cover abuts against one of the sealing protrusions, and the outer peripheral surface of the sealing protrusion abuts against the side wall of the mounting hole.

[0011] Preferably, the sealing protrusion is made of the same material as the top rubber.

[0012] Preferably, the mounting hole is a stepped hole, and the sealing protrusion is located at the step position within the mounting hole.

[0013] Preferably, a certain included angle is formed between the two sealing protrusions.

[0014] Preferably, the sealing structure further includes a retaining ring for limiting the sealing cover.

[0015] Preferably, the retaining ring is embedded in a limiting groove provided on the inner wall of the mounting hole and pressed against the sealing cover.

[0016] The beneficial effects of adopting the technical solution of the present utility model are as follows:

[0017] In the present utility model, the sealing protrusion and the top rubber for sealing are integrally arranged. The sealing cover and the top rubber are simultaneously pressed into the mounting hole of the upper connection support. Radially, a pre-compression amount is generated on the sealing protrusion by the mounting hole, and axially, a pre-compression amount is generated on the sealing protrusion by the extrusion of the lower end surface of the sealing cover, thereby realizing effective sealing. The complicated steps of pre-assembling the sealing ring and the sealing cover during assembly are omitted, and the assembly efficiency is improved. At least two sealing protrusions are provided and arranged at intervals, and a lubricating cavity is formed between the two sealing protrusions, which has a small frictional resistance and a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the sealing structure of the upper connection support in the prior art;

[0019] Figure 2 is a schematic diagram of an embodiment of the sealing structure of the upper connection support of an air spring of the present utility model.

[0020] Among them, Figure 1 in, 1'-upper connection support, 2'-O-ring, 3'-top rubber, 4'-sealing cover, 5'-retaining ring.

[0021] Figure 2 in, 1-upper connection support, 21-first sealing protrusion, 22-second sealing protrusion, 3-top rubber, 4-sealing cover, 5-retaining ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments, and do not limit the scope of the present utility model.

[0023] In the description of the present utility model, 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 drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" shall 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. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The specific embodiments are as follows:

[0026] Embodiment 1, as Figure 2 shown, an upper connection support sealing structure of an air spring, the sealing structure includes an upper connection support 1, a top rubber 3 and a sealing cover 4.

[0027] At least two sealing protrusions are provided at the maximum outer circumference of the top rubber 3. The sealing protrusions are integrally formed with the top rubber, and the sealing protrusions are annular for providing the function of a sealing ring. In this embodiment, two sealing protrusions are provided, namely a first sealing protrusion 21 and a second sealing protrusion 22. The first sealing protrusion 21 and the second sealing protrusion 22 are arranged at intervals along the axial direction of the top rubber 3, so that a gap is formed between the two.

[0028] When the air spring upper connection support sealing structure in this embodiment is in use, first use a jig to freely place the top rubber 3 into the installation hole of the upper connection support 1, then install the sealing cover 4 into the jig and align it with the installation hole of the upper connection support 1, and press the sealing cover 4 and the top rubber 3 into the installation hole of the upper connection support 1 at the same time. At this time, the first sealing protrusion 21 and the second sealing protrusion 22 cooperate with the inner wall of the installation hole to form a seal. During assembly, only the sealing cover 4 and the top rubber 3 need to be directly pressed into the upper connection support 1, eliminating the cumbersome steps of pre-assembling an O-ring. The assembly process is simpler and the assembly efficiency is improved. Among them, radially, the side wall of the installation hole generates a pre-compression amount on the sealing protrusion, and axially, the lower end surface of the sealing cover 4 squeezes to generate a pre-compression amount on the sealing protrusion, so as to achieve effective sealing. Also, when the sealing effect is formed, a lubricating cavity is formed between the two sealing protrusions, which has a small frictional resistance and a good sealing effect.

[0029] Further, the materials of the first sealing protrusion 21 and the second sealing protrusion 22 are the same as that of the top rubber 3, so as to facilitate the integral molding of the sealing protrusion and the top rubber 3.

[0030] Further, the installation hole of the upper connection support 1 is a stepped hole, and the diameter is larger at the top and smaller at the bottom. The top rubber 3 is placed inside the upper connection support 1, so that the two sealing protrusions are at the step of the stepped hole. After assembly, the step surface and the lower end surface of the sealing cover 4 cooperate to squeeze the sealing protrusion to generate a pre-compression amount to ensure the sealing effect.

[0031] Further, a certain included angle is formed between the first sealing protrusion 21 and the second sealing protrusion 22. When being squeezed by the step surface and the lower end surface of the sealing cover 4, the included angle between the first sealing protrusion 21 and the second sealing protrusion 22 becomes smaller, so that the first sealing protrusion 21 and the second sealing protrusion 22 extend outward by a certain amount to abut against the side wall of the installation hole to achieve sealing.

[0032] Further, the sealing structure further includes a retaining ring 5. Specifically, a limiting groove is provided on the side wall of the installation hole. During assembly, the retaining ring 5 is embedded in the limiting groove. The sealing cover 4 is above the top rubber 3 and is pressed into the upper connection support 1 at the same time. The retaining ring 5 presses on the upper part of the sealing cover 4 and is used to limit the sealing cover 4 to ensure the extrusion force of the sealing cover 4 on the sealing protrusion.

[0033] The above has made an exemplary description of the present invention in combination with the drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the technical solutions of the present invention, or the concept and technical solutions of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An air spring upper connection support sealing structure, the sealing structure comprising an upper connection support, a top rubber and a sealing cover, characterized in that: At least two sealing protrusions are integrally provided at the maximum circumference of the top glue, the sealing protrusions form an annular sealing ring, and the two sealing protrusions are arranged at intervals along the axis of the top glue. When the sealing cover presses the top glue into and fixes it in the mounting hole of the upper connecting support, the lower end of the sealing cover abuts against one of the sealing protrusions, and the outer peripheral surface of the sealing protrusion abuts against the side wall of the mounting hole.

2. The air spring upper connection support sealing structure according to claim 1, characterized in that: The sealing protrusion is made of the same material as the top glue.

3. The air spring upper connection support sealing structure according to claim 2, characterized in that: The mounting hole is a stepped hole, and the sealing protrusion is located at a stepped position in the mounting hole.

4. The air spring upper connection support sealing structure according to claim 3, characterized in that: An angle is formed between the two sealing protrusions.

5. The air spring upper connection support sealing structure according to any one of claims 1 to 4, characterized in that: The sealing structure also includes a stop ring for limiting the position of the sealing cover.

6. The air spring upper connection support sealing structure according to claim 5, characterized in that: The stop ring is embedded in a limiting groove arranged on the inner wall of the mounting hole and is pressed tightly on the sealing cover.

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