Anti-deviation spring base for heavy truck rear axle air suspension system

Abstract

The utility model relates to heavy truck rear axle air suspension system is with preventing excursion spring base, include: the body, the top of body has an opening, and with the telescopic cooperation of the plug -in tube of body, one end of plug -in tube passes through the opening and enters the body, the other end is connected with the top cap of suspension system, when the suspension system telescopes, the plug -in tube and the body take place adaptive telescopic motion and limit the relative movement direction, the utility model discloses device realizes all -round radial limiting through "double -sided direction + coupling constraint", the guide ring of body opening and the spring piece of plug -in tube form "the outer ring multi -contact direction", when the spring piece is pasted and slides the inner surface of guide ring, can limit the radial deviation of plug -in tube outer ring, at the same time, the socket in the body and plug -in tube form "mortise and tenon type coupling", the spring piece inserts the socket slot, socket rib piece inserts the spring piece gap, from the inner ring and outer ring of plug -in tube synchronous constraint radial displacement.

Description

Technical Field

[0001] This utility model belongs to the field of suspension system technology, and specifically relates to an anti-deviation spring base for a rear axle air suspension system of a heavy-duty truck. Background Technology

[0002] Heavy-duty trucks, as core equipment for long-haul freight and engineering transportation, need to operate under heavy loads and complex road conditions for extended periods. The rear axle air suspension system, as a key assembly that "connects the upper and lower sections," must not only bear the weight of the entire vehicle and buffer road impacts but also ensure driving stability. The air spring base, as the core transition component connecting the air spring and the rear axle, absorbs energy when the heavy-duty truck travels over bumpy roads by extending and retracting, causing the insert to slide along the body axis.

[0003] However, when heavy trucks turn, change lanes, or tilt, the rear axle will generate a large lateral force, which can easily cause the air spring to run radially. After long-term operation, the offset air spring will have problems such as friction between the bladder and the base edge and local overstretching, which can easily lead to the breakage of the bladder fabric layer and the aging and leakage of the seals. Utility Model Content

[0004] This utility model addresses the problems of the prior art by providing an anti-deviation spring base for a rear axle air suspension system of heavy-duty trucks. The specific technical solution is as follows:

[0005] Anti-deviation spring base for rear axle air suspension system of heavy-duty truck, including:

[0006] The body has an opening at its top;

[0007] And a retractable insert that is compatible with the main body, one end of which extends into the main body through an opening, and the other end of which is connected to the top cover of the suspension system;

[0008] When the suspension system extends or retracts, the insert and the main body undergo adaptive extension and retraction movements, which restrict the relative direction of movement.

[0009] As a further technical solution of this utility model, the open end of the body has a guide ring extending inward, and the insert includes multiple sets of spring pieces spaced apart along the circumference of the guide ring, the spring pieces fitting against the inner surface of the guide ring.

[0010] As a further technical solution of this utility model, the extended end of the body has a stop portion that bends outward, and the insertion end of the spring piece has a stop piece that matches the stop portion.

[0011] When the baffle contacts the stop, the body and the insert reach the maximum relative motion.

[0012] As a further technical solution of this utility model, a socket is coaxially installed in the body, and the socket includes a fixing ring, multiple ribs evenly arranged circumferentially on the fixing ring, and a slot formed between two adjacent ribs.

[0013] When the insert and the main body extend or retract, the insert and the socket are coupled and plugged in.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) The device achieves all-round radial limiting through "dual guidance + coupling constraint": the guide ring of the main body opening and the spring piece of the insert form "outer ring multi-contact guidance". When the spring piece slides against the inner surface of the guide ring, it can limit the radial displacement of the outer ring of the insert. At the same time, the socket inside the main body and the insert form "mortise and tenon coupling". The spring piece is inserted into the socket slot and the socket rib is embedded in the gap of the spring piece, thus constraining the radial displacement from the inner and outer rings of the insert. This multi-dimensional anti-offset design can effectively resist the vibration and impact of the bumpy road surface of the heavy truck and the lateral tilt force when turning, ensuring that the air spring always extends and contracts along the preset axis. It avoids the distortion of the air spring bladder and local stress concentration caused by the offset of the traditional base, significantly reduces the probability of bladder tearing and air leakage, and improves the stability of the suspension system, reduces the body sway of the heavy truck during driving, and ensures the safety of freight transportation.

[0016] (2) The guide ring and the spring piece adopt a "rigid guide rail + elastic contact" mating mode: the guide ring provides a stable annular guiding reference to ensure uniform circumferential force during the extension and retraction of the insert; the elastic properties of the spring piece itself allow it to fit tightly against the inner surface of the guide ring, and even if there are minor assembly errors, the gap can be eliminated through elastic deformation, avoiding the "jamming friction" of traditional rigid mating. This design can reduce the hard friction loss between the guide ring and the spring piece, and absorb some vibration energy through the elastic buffer of the spring piece. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the anti-deviation spring base for the rear axle air suspension system of a heavy-duty truck is shown.

[0018] Figure 2 A schematic diagram of the structure of the body and the insert is shown;

[0019] Figure 3 A schematic diagram of the fitting of the socket and the insert is shown.

[0020] Legend:

[0021] 100, Body; 110, Guide ring; 111, Stop; 200, Insert; 210, Spring; 211, Baffle; 300, Socket; 310, Retaining ring; 320, Rib; 330, Slot. Detailed Implementation

[0022] 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.

[0023] Figure 1 A schematic diagram of the overall structure of the anti-deviation spring base for the rear axle air suspension system of a heavy-duty truck is shown. Figure 2 A schematic diagram of the structure of the body 100 and the insert 200 in conjunction is shown; Figure 1 and Figure 2 In this heavy-duty truck rear axle air suspension system, the anti-deviation spring base includes:

[0024] Body 100, the top of body 100 has an opening;

[0025] And a retractable insert 200 that is compatible with the main body 100, one end of which extends into the main body 100 through an opening, and the other end is connected to the top cover of the suspension system.

[0026] When the suspension system extends or retracts, the insert 200 and the main body 100 undergo adaptive extension and retraction movements, which limit the relative direction of movement.

[0027] The main body 100, as the core load-bearing component of the spring base, is directly connected to the rear axle of the heavy truck, bearing the load and vibration impact force transmitted by the air spring. Its top opening provides a channel for the extension and retraction of the insert 200, while the inner wall contour of the opening forms a preliminary radial constraint on the insert 200. One end of the insert 200 extends into the main body 100, and the other end connects to the top cover of the suspension system, essentially creating a "telescopic transition connector" between the main body 100 and the top cover. When the heavy truck travels over bumpy roads, and the air spring compresses or extends, the insert 200 slides axially along the opening of the main body 100 synchronously with the top cover, achieving "adaptive extension and retraction." Simultaneously, the fit clearance between the opening of the main body 100 and the insert 200 is strictly controlled, limiting the radial offset of the insert 200 and allowing only axial movement. Through the combination of "axial extension and retraction + radial limiting," the air spring is ensured to always extend and retract along a preset axis, avoiding localized stress concentration caused by offset of the air spring, extending the service life of the air spring, and improving the suspension stability of the heavy truck while driving, reducing vehicle sway.

[0028] The open end of the body 100 has a guide ring 110 extending inward, and the insert 200 includes multiple sets of spring pieces 210 arranged at intervals along the circumference of the guide ring 110. The spring pieces 210 fit against the inner surface of the guide ring 110.

[0029] The guide ring 110 at the open end of the body 100 is equivalent to a "high-precision guide rail". Its inwardly extending annular structure further reduces the radial movement space of the insert 200 and improves the guiding accuracy. The multiple sets of spring pieces 210 of the insert 200 are arranged circumferentially along the guide ring 110, and the outer surface of each spring piece 210 is in close contact with the inner surface of the guide ring 110, forming a "multi-contact guiding fit". When the insert 200 extends or retracts along the axial direction of the body 100, the spring pieces 210 slide synchronously with the insert 200. The inner surface of the guide ring 110 provides stable sliding support for the spring pieces 210, preventing the spring pieces 210 from tilting to one side. At the same time, the spring pieces 210 themselves have a certain degree of elasticity. If they encounter a slight radial impact force, the spring pieces 210 can undergo slight deformation to buffer the stress, and can quickly return to their original position after deformation without affecting the guiding accuracy. The combination of "rigid guide ring + elastic spring sheet" has significant advantages: on the one hand, the ring structure of the guide ring 110 ensures uniform circumferential guidance and avoids uneven force distribution when guided by the traditional "single guide rail"; on the other hand, the elastic fit of the spring sheet 210 can reduce hard friction wear between the guide ring and the spring sheet, and absorb some vibration through elastic buffering, reduce component noise, and extend the service life of the guide structure.

[0030] The extended end of the body 100 has a stop portion 111 that bends outward, and the insertion end of the spring piece 210 has a baffle 211 that matches the stop portion 111.

[0031] When the baffle 211 contacts the stop part 111, the body 100 and the insert 200 reach the maximum value of relative motion.

[0032] The stop portion 111 at the extended end of the body 100 is a "ring-shaped protrusion bent outwards," while the baffle 211 at the insertion end of the spring piece 210 is a "sheet-like structure extending outwards." Their shapes and positions are precisely matched to form a "mechanical limit lock." When the air spring is overstretched, the insert 200 slides upwards along the body 100, causing the spring piece 210 to move upwards synchronously. When it slides to its limit position, the baffle 211 on the spring piece 210 abuts against the stop portion 111 of the body 100. The stop portion 111, through the baffle 211, exerts a downward constraint force on the spring piece 210, preventing the insert 200 from continuing to slide upwards, thereby limiting the maximum relative movement distance between the body 100 and the insert 200. This ensures that even under extreme operating conditions, the body and the insert will not separate, guaranteeing the safety of heavy-duty truck operation.

[0033] Figure 3 A schematic diagram of the structure of the socket 200 and the receptacle 300 in operation is shown. Figure 3 In the body 100, a socket 300 is coaxially installed. The socket 300 includes a fixing ring 310, multiple ribs 320 evenly arranged circumferentially on the fixing ring 310, and a slot 330 formed between two adjacent ribs 320.

[0034] When the insert 200 and the main body 100 extend or retract, the insert 200 and the socket 300 are coupled and plugged in.

[0035] The spring piece 210 is inserted into the slot 330, and the rib 320 is inserted into the gap formed by two adjacent spring pieces 210.

[0036] The socket 300 inside the main body 100 is rigidly connected to the inner wall of the main body 100 via a fixing ring 310, ensuring its fixed position and coaxiality with the main body 100. Multiple ribs 320 of the socket 300 are evenly distributed circumferentially, and the number and position of the slots 330 between adjacent ribs correspond one-to-one with the spring pieces 210 of the plug tube 200, forming a "mortise and tenon coupling structure." When the plug tube 200 is inserted into the main body 100, the spring pieces 210 are precisely inserted into the corresponding slots 330, while the ribs 320 are embedded in the gaps between two adjacent spring pieces 210. This bidirectional coupling of "spring pieces inserting into slots, rib pieces inserting into gaps" allows the plug tube 200 and the socket 300 to form a circumferentially omnidirectional mutual constraint. When the insert 200 extends or retracts axially, the spring 210 slides along the inner wall of the slot 330, while the rib 320 slides along the gap between the springs. Together, they restrict the radial displacement of the insert 200. Even when encountering lateral forces generated by heavy truck turning or tilting, the coupling structure can offset the lateral forces and prevent the insert from shifting by the mutual contact between the spring and the slot, and between the rib and the gap. Compared with a single guide ring, this design provides a more comprehensive anti-displacement effect: the guide ring can only constrain the radial displacement of the outer ring of the insert, while the coupling structure can constrain it from both the inner and outer rings of the insert, forming a "double anti-displacement" effect, which can adapt to the multi-directional force requirements under the complex working conditions of heavy trucks. At the same time, the rib 320 can also enhance the structural strength of the socket 300, share the load-bearing pressure of the body 100, and improve the overall impact resistance of the base.

[0037] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. An anti-deviation spring base for a rear axle air suspension system of a heavy-duty truck, characterized in that, include: The body (100) has an opening at its top; And a retractable insert (200) that is compatible with the body (100), one end of the insert (200) extending into the body (100) through an opening, and the other end connected to the top cover of the suspension system; When the suspension system extends or retracts, the insert (200) and the body (100) undergo adaptive extension and retraction movements, which restrict the relative direction of movement.

2. The anti-deviation spring base for a heavy-duty truck rear axle air suspension system according to claim 1, characterized in that: The body (100) has an inwardly extending guide ring (110) at its open end. The insert (200) includes multiple sets of spring pieces (210) spaced apart along the circumference of the guide ring (110). The spring pieces (210) fit against the inner surface of the guide ring (110).

3. The anti-deviation spring base for a heavy-duty truck rear axle air suspension system according to claim 2, characterized in that: The extension end of the body (100) has a stop portion (111) that bends outward, and the insertion end of the spring piece (210) has a baffle (211) that matches the stop portion (111). When the baffle (211) contacts the stop (111), the body (100) and the insert (200) reach the maximum value of relative motion.

4. The anti-deviation spring base for a heavy-duty truck rear axle air suspension system according to claim 3, characterized in that: A socket (300) is coaxially installed inside the body (100). The socket (300) includes a fixing ring (310), multiple ribs (320) evenly arranged circumferentially on the fixing ring (310), and a slot (330) formed between two adjacent ribs (320). When the insert (200) and the body (100) extend or retract, the insert (200) and the socket (300) are coupled and plugged in.

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