Plug assembling component for air spring

Abstract

According to the plug assembling component for the air spring, the structure of the plug device of the upper air tap is optimized, the integrated positioning anti-rotation part is additionally arranged on the basis of the structure of a common plug device, the positioning anti-rotation part is in a plug shape, and when the columnar plug part of the plug device reaches the position where the columnar plug part is matched with the upper air tap in an inserted mode, the plug device can be inserted into the upper air tap. When the air spring upper cover is installed and placed, the positioning anti-rotation part can be exactly matched with the positioning groove structure on the adjacent air spring upper cover in a concave-convex mode, and therefore the air spring upper cover can be limited or corrected to a certain degree through the positioning anti-rotation part and the positioning groove structure on the adjacent air spring upper cover. The positioning anti-rotation part of the air spring upper cover is vertically upward, then the air spring upper cover is placed, and the positioning anti-rotation part is clamped into the positioning groove structure when the air spring upper cover is placed in a right state, so that positioning of the air spring upper cover is effectively guaranteed, and dislocation of the air spring upper cover in the logistics transferring process and the like is avoided; and subsequent adjustment of the position of the air spring upper cover is avoided.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and more specifically, to a plug assembly for an air spring. Background Technology

[0002] Air springs are made by filling a sealed container with compressed air, utilizing the compressibility of gas to achieve their elastic effect. Air springs possess ideal non-linear elastic characteristics; with the addition of a height adjustment device, the vehicle height does not change with load variations, and the spring stiffness can be designed to be lower, resulting in good ride comfort. Currently, air spring suspension systems used in automobiles have complex structures and high manufacturing costs.

[0003] When assembling an automotive air spring body with the vehicle body, a specific angle must be maintained. Because of the presence of bearings, it is difficult to ensure that the rear suspension air spring cover on the market maintains a specific design position during assembly, delivery, and transportation. As a result, the air spring cover needs to be specially adjusted in angle during final assembly and debugging to ensure that the cover can work properly, which increases the installation cost of the air spring.

[0004] In summary, the existing air springs for automobiles have technical problems such as inconvenient installation of the top cover, which leads to high operating costs. Utility Model Content

[0005] The technical problem this invention aims to solve is that the installation of the top cover of existing automotive air springs is inconvenient, leading to high operating costs.

[0006] To address the aforementioned problems, this utility model provides a plug assembly for an air spring, comprising an air spring bracket, a spring piston, an air spring cover, and an upper air nozzle. The upper air nozzle is positioned and installed on the outer edge of the air spring bracket. The spring piston and the air spring cover are sequentially sleeved on the outer edge region of the air spring bracket above the upper air nozzle. A plug device is inserted into the upper air nozzle. The plug device includes an integrally connected cylindrical plug and a plug-shaped positioning anti-rotation part. The outer periphery of the cylindrical plug conforms to the inner periphery of the upper air nozzle. The protruding direction of the positioning anti-rotation part is the same as the insertion direction of the cylindrical plug. The air spring cover has a positioning groove structure on its end face facing the upper air nozzle. The positioning groove structure is used to conform to the positioning anti-rotation part when the cylindrical plug is inserted into the upper air nozzle.

[0007] This design provides a novel plug assembly that optimizes the structure of the upper air nozzle plug device. It adds an integrated positioning and anti-rotation part to the general plug device structure. This positioning and anti-rotation part is plug-shaped. When the cylindrical plug of the plug device reaches the position for insertion and engagement with the upper air nozzle, the positioning and anti-rotation part precisely forms a concave-convex fit with the positioning groove structure on the adjacent air spring cover. This structure achieves a certain limiting or correct positioning effect on the air spring cover. Before installing the air spring cover, the plug device is inserted into the upper air nozzle with its positioning and anti-rotation part vertically upward. Then, the air spring cover is placed. With the air spring cover in an upright position, the positioning and anti-rotation part engages with the positioning groove structure, effectively ensuring the positioning of the air spring cover and preventing misalignment during transportation and logistics. This avoids subsequent adjustments to the air spring cover's position and effectively solves the technical problem of inconvenient installation of the cover in existing automotive air springs, leading to high operating costs.

[0008] As a preferred embodiment, the air spring bracket is provided with a planar bearing between the spring piston and the air spring cover, and the positioning anti-rotation part includes a first boss part and a second boss part integrally connected, the position of the first boss part corresponding to the position of the positioning groove structure.

[0009] The design further optimizes the positioning and anti-rotation structure. The positioning and anti-rotation structure is adapted to the shape of the side edge of the air spring bracket. When the columnar plug is inserted into the upper air nozzle, the first boss and the positioning groove structure of the air spring cover form a concave-convex positioning fit. Since the columnar plug itself is difficult to accurately position in the circumference, the concave-convex fit between the boss and the groove can ensure accurate circumferential positioning, thus ensuring the correct position of the air spring cover that it positions.

[0010] As a preferred embodiment, the side profile of the first and second boss portions is integrally formed in a right-angled step shape, and the protrusion distance of the second boss portion towards the positioning groove structure is greater than the protrusion distance of the first boss portion. This design further optimizes the above-mentioned structure of two-part boss portions. The common side profile of the first and second boss portions is in a right-angled step shape, and the protrusion of the second boss portion is more obvious than that of the first boss portion, which better adapts to the side edge shape of the air spring bracket.

[0011] As a preferred embodiment, the cylindrical plug is cylindrical, the positioning and anti-rotation part is symmetrical, and the central axis of the cylindrical plug is located within the symmetrical midplane of the positioning and anti-rotation part. This design optimizes the overall shape of the plug device and adopts a symmetrical design, thus ensuring the process feasibility of injection molding and demolding.

[0012] As a preferred embodiment, the thickness of the positioning anti-rotation part in the direction perpendicular to its plane ranges from 3mm to 4mm, including the endpoints. This thickness design range ensures the anti-rotation function while also considering manufacturing feasibility and strength.

[0013] As a preferred embodiment, the top of the first boss is conical, and the conical top is symmetrical about the midplane of the positioning and anti-rotation part. This design optimizes the top shape of the first boss, and the top position of the first boss is used to form a concave-convex limiting fit with the air spring cover. To ensure that the concave-convex structure of the two can be easily aligned, the conical top allows the first boss to slide smoothly into the positioning groove structure, further reducing the assembly difficulty.

[0014] As a preferred embodiment, the cylindrical plug portion of the plug device is shaped like a hollow cylinder. This design optimizes the structure of the cylindrical plug portion, allowing the outer cylindrical shape to form a good insertion and sealing assembly with the inner edge of the upper air nozzle, while the hollow internal structure saves material.

[0015] As a preferred embodiment, the outer surface of the cylindrical plug portion of the plug device is provided with an annular groove structure along the circumference of the cylinder for engaging with the sealing ring on the inner circumferential surface of the upper air nozzle. This design improves the sealing strength between the cylindrical plug portion of the plug device and its external upper air nozzle structure, with an annular groove structure specifically provided on the outer periphery of the cylindrical plug portion to accommodate the sealing ring.

[0016] As a preferred embodiment, the positioning and anti-rotation part is inclined on the side opposite to the insertion direction of the cylindrical plug. This design optimizes the contour structure of the other side of the positioning and anti-rotation part. By adopting an inclined structure on the side where no insertion is performed, the external sharp edges near the plug position are reduced, thus optimizing the assembly processability of the workpiece. Attached Figure Description

[0017] Figure 1 A partial cross-sectional structural diagram of a plug assembly for an air spring provided by this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the plug device used in the plug assembly assembly for air springs;

[0019] Figure 3 for Figure 2 A schematic diagram of the side cross-section structure of the middle plug device.

[0020] in, Figure 1-Figure 3 middle:

[0021] 1. Air spring bracket; 2. Plug device; 2-1. Columnar plug part; 2-2. Positioning and anti-rotation part; 2-2-1. First boss part; 2-2-2. Second boss part; 2-3. Annular groove structure; 3. Upper air nozzle; 4. Air spring cover; 5. Spring piston; 6. Surface bearing. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Before providing a detailed explanation of the working principle of this utility model, further clarification is needed regarding its description: In this description, terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welded connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] refer to Figure 1-Figure 3 The following examples illustrate this. Figure 1 A partial cross-sectional structural diagram of a plug assembly for an air spring provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the plug device used in the plug assembly assembly for air springs; Figure 3 for Figure 2 A schematic diagram of the side cross-section structure of the middle plug device.

[0026] This embodiment provides a plug assembly for an air spring, including an air spring bracket 1, a spring piston 5, an air spring cover 4, and an upper air nozzle 3. The upper air nozzle 3 is positioned and installed on the outer edge of the air spring bracket 1. The spring piston 5 and the air spring cover 4 are sequentially sleeved on the outer edge area of ​​the air spring bracket 1 above the upper air nozzle 3. A plug device 2 is inserted into the upper air nozzle 3. The plug device 2 includes an integrally connected cylindrical plug part 2-1 and a plug-shaped positioning anti-rotation part 2-2. The outer peripheral shape of the cylindrical plug part 2-1 is concave-convex with the inner peripheral shape of the upper air nozzle 3. The protruding direction of the positioning anti-rotation part 2-2 is in the same direction as the insertion direction of the cylindrical plug part 2-1. The air spring cover 4 has a positioning groove structure on the end face facing the upper air nozzle 3. The positioning groove structure is used to engage with the positioning anti-rotation part 2-2 when the cylindrical plug part 2-1 is inserted into the upper air nozzle 3.

[0027] This utility model provides a novel plug assembly that optimizes the structure of the plug device 2 of the upper air nozzle 3. Based on the general plug device 2 structure, an integrally connected positioning and anti-rotation part 2-2 is added. The positioning and anti-rotation part 2-2 is plug-shaped. When the cylindrical plug part 2-1 of the plug device 2 reaches the insertion position with the upper air nozzle 3, the positioning and anti-rotation part 2-2 can precisely form a concave-convex fit with the positioning groove structure on the adjacent air spring cover 4. This structure can achieve a certain limiting or positioning effect on the air spring cover 4, thus facilitating installation. Before placing the air spring cover 4, insert the plug device 2 into the upper air nozzle 3, ensuring that the positioning anti-rotation part 2-2 is vertically upward. Then, place the air spring cover 4. With the air spring cover 4 in the correct position, the positioning anti-rotation part 2-2 engages with the positioning groove structure, thus effectively ensuring the positioning of the air spring cover 4. This prevents the air spring cover 4 from being misaligned during transportation and logistics, and avoids subsequent adjustments to the position of the air spring cover 4. This effectively solves the technical problem of inconvenient installation of the cover of existing automotive air springs, which leads to high operating costs.

[0028] In the technical solution provided in this embodiment, the air spring bracket 1 has a plane bearing 6 between the spring piston 5 and the air spring cover 4. The positioning anti-rotation part 2-2 includes a first boss part 2-2-1 and a second boss part 2-2-2 that are integrally connected. The position of the first boss part 2-2-1 corresponds to the position of the positioning groove structure.

[0029] The design further optimizes the structure of the positioning and anti-rotation part 2-2. The structure of the positioning and anti-rotation part 2-2 is adapted to the side edge shape of the air spring bracket 1. When the columnar plug part 2-1 is inserted into the upper air nozzle 3, the first boss part 2-2-1 and the positioning groove structure of the air spring cover 4 form a concave-convex positioning fit. Since the columnar plug part 2-1 itself is difficult to accurately position in the circumference, the concave-convex fit between the boss and the groove structure can ensure the accuracy of the circumferential position, so as to ensure the correct position of the air spring cover 4 positioned by it.

[0030] In the technical solution provided in this embodiment, the side contour of the first boss portion 2-2-1 and the second boss portion 2-2-2 is integrally formed in the shape of a right-angled step. The protrusion distance of the second boss portion 2-2-2 towards the positioning groove structure is greater than the protrusion distance of the first boss portion 2-2-1. This design is a further optimization based on the above-mentioned structure of two-part boss portions. The common side edge contour of the first boss portion 2-2-1 and the second boss portion 2-2-2 is in the shape of a right-angled step. The protrusion of the second boss portion 2-2-2 is more obvious than that of the first boss portion 2-2-1, which better adapts to the side edge shape of the air spring bracket 1.

[0031] In the technical solution provided in this embodiment, the cylindrical plug 2-1 is cylindrical, and the positioning and anti-rotation part 2-2 is symmetrical. The central axis of the cylindrical plug 2-1 is located in the symmetrical midplane of the positioning and anti-rotation part 2-2. This design optimizes the overall shape of the plug device 2 and adopts a symmetrical design, thus ensuring the process feasibility of injection molding and demolding.

[0032] In the technical solution provided in this embodiment, the thickness of the positioning anti-rotation part 2-2 in the direction perpendicular to its plane ranges from 3mm to 4mm, including the endpoint value. The thickness design range of the positioning anti-rotation part 2-2 ensures the anti-rotation function while also taking into account process feasibility and strength.

[0033] In the technical solution provided in this embodiment, the top of the first boss portion 2-2-1 is conical, and the conical top is symmetrical about the midplane of the positioning and anti-rotation portion 2-2. This design optimizes the top shape of the first boss portion 2-2-1. The top position of the first boss portion 2-2-1 is used to form a concave-convex limiting fit with the air spring cover 4. To ensure that the concave-convex structure of the two can be easily aligned, the conical top allows the first boss portion 2-2-1 to slide smoothly into the positioning groove structure, further reducing the assembly difficulty.

[0034] In the technical solution provided in this embodiment, the cylindrical plug portion 2-1 of the plug device 2 is a hollow cylindrical body. This design optimizes the structure of the cylindrical plug portion 2-1, allowing the outer contour cylinder to form a good insertion and sealing assembly with the inner edge of the upper air nozzle 3, while the hollow internal structure saves materials.

[0035] In the technical solution provided in this embodiment, the outer side of the cylindrical plug portion 2-1 of the plug device 2 is provided with an annular groove structure 2-3 along the circumference of the cylinder, which is used to cooperate with the sealing ring on the inner circumferential surface of the upper air nozzle 3. This design improves the sealing strength between the cylindrical plug portion 2-1 of the plug device 2 and its external upper air nozzle 3 structure, and the annular groove structure 2-3 for adapting the sealing ring is specially provided on the outer periphery of the cylindrical plug portion 2-1.

[0036] In the technical solution provided in this embodiment, the positioning anti-rotation part 2-2 is inclined on the side opposite to the insertion direction of the cylindrical plug part 2-1. This design optimizes the contour structure of the other side of the positioning anti-rotation part 2-2. The contour of the side where the insertion is not performed adopts an inclined structure, reducing the external sharp edges near the plug position and optimizing the assembly process of the workpiece.

[0037] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A plug assembly for an air spring, comprising an air spring bracket (1), a spring piston (5), an air spring cover (4), and an upper air nozzle (3), wherein the upper air nozzle (3) is positioned and installed on the outer edge of the air spring bracket (1), and the spring piston (5) and the air spring cover (4) are sequentially sleeved on the outer edge region of the air spring bracket (1) above the upper air nozzle (3), characterized in that, The upper air nozzle (3) is fitted with a plug device (2). The plug device (2) includes an integrally connected cylindrical plug (2-1) and a plug-shaped positioning anti-rotation part (2-2). The outer periphery of the cylindrical plug (2-1) is in concave-convex fit with the inner periphery of the upper air nozzle (3). The protruding direction of the positioning anti-rotation part (2-2) is in the same direction as the insertion direction of the cylindrical plug (2-1). The air spring cover (4) has a positioning groove structure on one end face facing the upper air nozzle (3). The positioning groove structure is used to cooperate with the positioning anti-rotation part (2-2) in concave-convex fit when the cylindrical plug (2-1) is inserted into the upper air nozzle (3).

2. The plug assembly for an air spring according to claim 1, characterized in that, The air spring bracket (1) has a plane bearing (6) between the spring piston (5) and the air spring cover (4). The positioning anti-rotation part (2-2) includes a first boss part (2-2-1) and a second boss part (2-2-2) integrally connected. The position of the first boss part (2-2-1) corresponds to the position of the positioning groove structure.

3. The plug assembly for an air spring according to claim 2, characterized in that, The side profile of the first boss (2-2-1) and the second boss (2-2-2) is a right-angled step, and the protrusion distance of the second boss (2-2-2) in the direction of the positioning groove structure is greater than the protrusion distance of the first boss (2-2-1).

4. The plug assembly for an air spring according to claim 2, characterized in that, The cylindrical plug (2-1) is cylindrical, the positioning and anti-rotation part (2-2) is symmetrical, and the central axis of the cylindrical plug (2-1) is located in the symmetrical midplane of the positioning and anti-rotation part (2-2).

5. The plug assembly for an air spring according to claim 4, characterized in that, The thickness of the positioning anti-rotation part (2-2) in the direction perpendicular to its plane ranges from 3mm to 4mm, including the endpoint value.

6. The plug assembly for an air spring according to claim 4, characterized in that, The top of the first boss (2-2-1) is conical, and the conical top is symmetrical about the midplane of the positioning and anti-rotation part (2-2).

7. The plug assembly for an air spring according to claim 6, characterized in that, The cylindrical plug part (2-1) of the plug device (2) is in the shape of a hollow cylindrical body.

8. The plug assembly for an air spring according to claim 4, characterized in that, The outer side of the cylindrical plug portion (2-1) of the plug device (2) is provided with an annular groove structure (2-2-3) along the circumference of the cylinder, which is used to cooperate with the sealing ring on the inner circumferential surface of the upper air nozzle (3).

9. The plug assembly for an air spring according to claim 1, characterized in that, The positioning anti-rotation part (2-2) is inclined on the side opposite to the insertion direction of the cylindrical plug part (2-1).

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