Air suspension system heavy truck rear axle special spring base structure

Abstract

This utility model relates to a dedicated spring base structure for heavy-duty truck rear axles in an air suspension system. It includes a main body and the following components installed within the main body: a first support assembly, comprising a first support member and a first connecting spring; the first support member is positioned above the main body to protect the air spring at its port; and the first support member is connected to the main body via the first connecting spring; and a second support assembly, comprising a second support member and a second connecting spring. This utility model achieves graded protection of the air spring through a synergistic mechanism of "pre-support by the first support assembly + energy replenishment support by the second support assembly." When the suspension compresses slightly, only the first support member buffers the pressure through the elastic deformation of the first connecting spring, ensuring driving comfort. When the suspension compresses excessively, the deformation of the first connecting spring triggers the second connecting spring, driving the second support member to move upward and cooperate with the first support member in supporting the air spring.

Description

Technical Field

[0001] This utility model belongs to the field of air suspension technology, and specifically relates to a spring base structure for heavy truck rear axle in air suspension systems. Background Technology

[0002] As the core equipment for heavy-duty freight transport, the rear axle air suspension system of heavy trucks needs to withstand loads of tens of tons for a long time and frequently cope with complex working conditions such as bumpy roads, heavy-load starts, and emergency braking. As the "elastic core" of the suspension system, the air spring achieves shock absorption and height adjustment by inflating and deflating the air bladder. However, the air bladder at the piston port is the weakest link of the air spring. This area is in contact with the suspension top cover and the piston at the same time, and is a key contact surface for the transmission of compression force. Once subjected to excessive compression or local friction, it is very easy for failures such as the fabric layer of the air bladder to break and the seals to age and leak. Utility Model Content

[0003] This utility model addresses the problems of existing technologies by providing a dedicated spring base structure for heavy-duty truck rear axles in air suspension systems. The specific technical solution is as follows: Air suspension system for heavy-duty truck rear axle: spring base structure, including the main body and components installed within it. A first support assembly, comprising a first support member and a first connecting spring, wherein the first support member is disposed above the main body to protect the air spring at the port, and the first support member is connected to the main body via the first connecting spring; The second support component includes a second support member and a second connecting spring. The second support member is connected to the body through the second connecting spring. The height of the second support member is lower than the height of the first support member. The second connecting spring abuts against the first connecting spring. When the suspension system is compressed, the first support member provides initial support and is compressed downwards, while the first connecting spring deforms and presses against the second connecting spring to drive the second support member to move upwards and provide secondary support.

[0004] As a further technical solution of this utility model, both the first support member and the second support member are configured as rings, and the second support member is coaxially disposed inside the first support member.

[0005] As a further technical solution of this utility model, the first connecting spring is uniformly arranged in multiple sets around the first support member, and the second connecting spring is uniformly arranged in multiple sets around the second support member.

[0006] As a further technical solution of this utility model, the lower surface of the first support member is wrapped with a foam pad.

[0007] As a further technical solution of this utility model, the second support component is coaxially disposed inside the first support component, the first connecting spring is an inwardly curved bow shape, and the second connecting spring is an outwardly curved bow shape.

[0008] The beneficial effects of this utility model are as follows: The device employs a synergistic mechanism of "pre-support from the first support component + energy replenishment support from the second support component" to achieve graded protection for the air spring. During minor suspension compression, only the first support component buffers the pressure through the elastic deformation of the first connecting spring, ensuring ride comfort. When the suspension is excessively compressed, the deformation of the first connecting spring triggers the second connecting spring, driving the second support component to move upward and work in conjunction with the first support component to provide support, significantly increasing support strength. This dynamic adaptation design effectively prevents excessive deformation of the air spring, avoids excessive compression of the air spring body by the top cover and piston, and significantly extends the service life of the air spring.

[0009] Both the first and second support components adopt a ring structure and are coaxially nested, perfectly matching the ring contour of the air spring bladder. This allows the compression pressure to be evenly distributed to the circumference of the support component, avoiding the localized force concentration in the bladder caused by the "point contact" of traditional block support components. At the same time, the coaxial design ensures that the support force is always transmitted along the central axis of the air spring, and will not be radially offset due to the turning and tilting of heavy trucks or uneven road surfaces, preventing the bladder from being squeezed and worn on one side by the top cover and piston. Attached Figure Description

[0010] Figure 1 This diagram shows the overall structure of the dedicated spring base for the rear axle of a heavy-duty truck in an air suspension system. Figure 2 A schematic diagram of the structure of the first support component and the second support component in cooperation is shown; Figure 3 A schematic diagram of the structure of the first support component is shown; Figure 4 A schematic diagram of the second support component is shown.

[0011] Legend: 100, Body; 200, First support assembly; 210, First support member; 220, First connecting spring; 230, Foam pad; 300, Second support assembly; 310, Second support member; 320, Second connecting spring. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0013] Figure 1This diagram shows the overall structure of the dedicated spring base for the rear axle of a heavy-duty truck in an air suspension system. Figure 2 This diagram shows the structure of the first support component 200 and the second support component 300 in cooperation. Figure 3 A schematic diagram of the structure of the first support component 200 is shown; Figure 4 A schematic diagram of the structure of the second support component 300 is shown; Figures 1-4 The air suspension system for heavy-duty truck rear axle includes a main body 100 and a spring base structure installed within the main body 100. The first support assembly 200 includes a first support member 210 and a first connecting spring 220. The first support member 210 is disposed above the body 100 to protect the air spring at the port. The first support member 210 is connected to the body 100 through the first connecting spring 220. The second support component 300 includes a second support member 310 and a second connecting spring 320. The second support member 310 is connected to the body 100 through the second connecting spring 320. The height of the second support member 310 is lower than the height of the first support member 210. The second connecting spring 320 abuts against the first connecting spring 220. When the suspension system is compressed, the first support member 210 provides initial support and is compressed downwards, while the first connecting spring 220 deforms and presses against the second connecting spring 320 to drive the second support member 310 to move upwards and provide secondary support.

[0014] The main body 100, as the core load-bearing frame of the base, is directly and rigidly connected to the rear axle of the heavy truck, bearing the heavy load pressure transmitted by the air spring and the impact of the road surface. The first support component 200 is the "first line of defense" for the air spring. The first support member 210 is located above the main body 100, covering the port area of ​​the air spring, which can prevent damage to the air spring body from foreign object impacts or bumps during assembly. At the same time, it is flexibly connected to the main body 100 through the first connecting spring 220, leaving a certain amount of deformation space. The second support component 300 serves as an "auxiliary support supplement." Because the height of the second support member 310 is lower than that of the first support member 210, it does not directly contact the air spring under normal conditions. It only slightly abuts against the first connecting spring 220 through the second connecting spring 320, forming a "ready to be triggered" state.

[0015] When a heavy truck travels over bumpy roads or carries heavy loads, causing excessive compression of the suspension system, the air spring first compresses the first support member 210 downwards, providing primary support and causing it to move downwards under pressure. The downward movement of the first support member 210 then causes the first connecting spring 220 to elastically deform. When the deformation reaches a certain level, the first connecting spring 220 actively presses against the second connecting spring 320, which in turn deforms in the opposite direction through pressure transmission. This ultimately causes the second support member 310 to move upwards, working together with the first support member 210 to support the air spring, achieving secondary support. This "primary buffer and secondary energy replenishment" design dynamically adjusts the support strength according to the degree of suspension compression. During small compressions, only the first support component works, ensuring comfort; during large compressions, both components work together to improve load-bearing capacity, prevent the air spring from being overloaded, and extend the overall service life of the air spring and its base.

[0016] Both the first support member 210 and the second support member 310 are ring-shaped, and the second support member 310 is coaxially arranged inside the first support member 210.

[0017] The second support member 310 is coaxially arranged with the first support member 210, which means that the central axis of the two is completely coincident with the central axis of the air spring and the body 100. When the suspension is compressed, the force direction of the first and second support members is always along the axial direction and there will be no radial offset. The annular coaxial structure can evenly bear the pressure through the circumferential surface. With the coaxial positioning, it ensures that the pressure is always transmitted to the body 100 along the center, avoiding problems such as base deformation and air spring offset caused by off-center loading. At the same time, the annular structure has stronger rigidity and can withstand greater radial torque, which is suitable for the side tilting condition when the heavy truck is turning.

[0018] Multiple sets of first connecting springs 220 are evenly arranged around the first support member 210, and multiple sets of second connecting springs 320 are evenly arranged around the second support member 310.

[0019] The first connecting springs 220 are evenly distributed around the first support member 210, meaning that the distance from each group of springs to the center of the first support member is equal and the spacing angle is consistent. When the first support member 210 is pressed down, the pressure is evenly transmitted to each group of first connecting springs 220 through the annular structure of the first support member, causing all springs to undergo elastic deformation synchronously, preventing any group of springs from breaking prematurely due to excessive force. Similarly, the even distribution of the second connecting springs 320 also ensures that the second support member 310 is subjected to balanced force when it moves upward, preventing unilateral tilting. This "multi-group even distribution" design can distribute pressure to more contact points, significantly improving the fatigue resistance of the springs and reducing base failure caused by spring breakage. At the same time, the synchronously deforming springs can drive the support member to move smoothly, avoiding jamming or offset when the support member moves up and down, ensuring the timely response of the secondary support, and further improving the stability of the suspension system.

[0020] The lower surface of the first support member 210 is covered with a foam pad 230.

[0021] When the foam pad 230 on the lower surface of the first support member 210 is made of high-density elastic foam material, when the first support member 210 is subjected to excessive pressure and moves downward, the foam pad 230 will first come into contact with the bladder and absorb part of the impact energy through its own compression deformation, forming a "flexible contact".

[0022] The second support component 300 is coaxially disposed inside the first support component 200. The first connecting spring 220 is an inwardly curved bow shape, and the second connecting spring 320 is an outwardly curved bow shape.

[0023] The second support component 300 is nested inside the first support component 200 and remains coaxial, which maximizes the use of the internal space of the main body 100 and avoids the excessive size of the base caused by the horizontal arrangement of the two components, making it suitable for the compact installation environment of the rear axle of heavy trucks. At the same time, the inner nesting structure makes the distance between the first and second connecting springs closer and the pressure transmission path shorter, ensuring a faster response of the secondary support.

[0024] The inwardly curved arc-shaped structure of the first connecting spring 220 allows it to naturally move inwards when deformed under pressure, precisely pressing against the outwardly curved second connecting spring 320. The two springs bend in opposite directions, forming a "complementary contact," which reduces energy loss during pressure transmission compared to springs bending in the same direction, making the upward movement of the second support 310 more efficient. Simultaneously, the arc-shaped spring has a larger deformation range and elastic recovery force than a straight spring, enabling it to withstand greater impact loads without easily breaking, further enhancing the impact resistance of the support assembly. This design optimizes spatial layout and strengthens force transmission efficiency and structural reliability, perfectly adapting to the complex operating conditions of heavy-duty truck rear axles.

[0025] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A spring base structure for heavy-duty truck rear axle in an air suspension system, characterized in that, Includes the main body (100) and the components installed within the main body (100): The first support assembly (200) includes a first support member (210) and a first connecting spring (220). The first support member (210) is disposed above the body (100) to protect the air spring at the port. The first support member (210) is connected to the body (100) through the first connecting spring (220). The second support component (300) includes a second support member (310) and a second connecting spring (320). The second support member (310) is connected to the body (100) through the second connecting spring (320). The height of the second support member (310) is lower than the height of the first support member (210). The second connecting spring (320) abuts against the first connecting spring (220). When the suspension system is compressed, the first support member (210) is supported once and moved downward under pressure, and the first connecting spring (220) deforms and presses against the second connecting spring (320) to drive the second support member (310) to move upward and be supported a second time.

2. The air suspension system heavy truck rear axle spring base structure according to claim 1, characterized in that: The first support member (210) and the second support member (310) are both ring-shaped, and the second support member (310) is coaxially arranged inside the first support member (210).

3. The air suspension system heavy truck rear axle spring base structure according to claim 2, characterized in that: The first connecting spring (220) is evenly arranged in multiple sets around the first support member (210), and the second connecting spring (320) is evenly arranged in multiple sets around the second support member (310).

4. The air suspension system heavy truck rear axle spring base structure according to claim 3, characterized in that: The lower surface of the first support member (210) is covered with a foam pad (230).

5. The air suspension system heavy truck rear axle spring base structure according to claim 3, characterized in that: The second support component (300) is coaxially disposed inside the first support component (200), the first connecting spring (220) is an inwardly curved bow shape, and the second connecting spring (320) is an outwardly curved bow shape.

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