Composite Air Suspension Structure for Heavy-Duty Vehicles

Technical Field

The utility model relates to the technical field of air suspension systems, in particular to a composite air suspension structure for heavy-duty vehicles.

Background Technology

A high-quality SUV must combine the comfort of a sedan with the off-road capability of an SUV, and an air suspension system is considered the optimal solution for achieving this goal. According to varying road conditions and signals from distance sensors, the vehicle control computer determines changes in body height and controls the air compressor and exhaust valve accordingly, enabling the springs to compress or extend automatically. This lowers or raises the vehicle chassis ground clearance to improve high-speed stability or enhance passability under complex road conditions.

In existing technologies, heavy-duty vehicles generally adopt composite air suspension structures to improve driving stability and comfort. Air springs are widely used in such systems. However, conventional air springs are often subjected to excessive stress deviating from the movement direction, resulting in reduced performance and shortened service life. Therefore, improvements are required.

Utility Model Content

The purpose of the utility model is to solve the problem in existing composite air suspension structures for heavy-duty vehicles where air springs suffer reduced performance and shortened service life due to excessive stress deviating from the movement direction.

To achieve the above purpose, the utility model adopts the following technical solution:

A composite air suspension structure for heavy-duty vehicles comprises two interconnected mounting plates, wherein the two mounting plates are respectively fixed at both ends of an air spring. A shock-absorbing spring is detachably installed between the two mounting plates, and a guide rod is also detachably installed between the two mounting plates.

The guide rod comprises a telescopic outer rod and a telescopic inner rod connected with each other, wherein the telescopic inner rod is movably inserted into the telescopic outer rod. The telescopic outer rod is threadedly connected to the mounting plate, and a connecting mechanism is arranged between the telescopic inner rod and the mounting plate.

Preferably, connecting plates are fixedly installed at both ends of the shock-absorbing spring. Multiple fastening screws are inserted at equal intervals on the outer side walls of the opposing sides of the two connecting plates, and the fastening screws pass through the connecting plates and are threadedly connected to the two mounting plates respectively.

Preferably, the connecting mechanism comprises a connecting groove formed on the mounting plate and matched with the telescopic inner rod. A limiting block is movably installed on the outer side wall at one end of the telescopic inner rod away from the telescopic outer rod. A limiting groove matched with the limiting block is formed on the inner side wall of the connecting groove, and the limiting groove extends to the outer side of the mounting plate.

Preferably, the telescopic inner rod is provided with an installation groove matched with the limiting block. Multiple movable rods are uniformly and movably inserted into the inner side wall of the installation groove, and the ends of the movable rods away from the installation groove are fixedly connected to the limiting block. A return spring is wound around the outer side wall of each movable rod, and both ends of each return spring are respectively fixed to the outer side wall of the limiting block and the inner side wall of the installation groove.

Preferably, multiple balls are uniformly installed on the inner side wall of the limiting groove, and the balls are in contact with the limiting block.

Preferably, a rubber sealing sleeve matched with the limiting block is fixedly installed on the inner side wall of the limiting groove.

Beneficial Effects

Compared with the prior art, the utility model has the following beneficial effects:

Mounting plates are fixed at both ends of the air spring, and the shock-absorbing spring and guide rod are installed between the two mounting plates. When the air spring is subjected to stress deviating from the movement direction, the telescopic outer rod and telescopic inner rod squeeze against each other to offset the stress, thereby preventing damage to the air spring caused by excessive lateral stress. This improves the working performance and prolongs the service life of the air spring.

The shock-absorbing spring between the two mounting plates reduces the working load of the air spring, thereby extending the service life of the air spring.

The structure is simple and allows convenient installation and removal of the shock-absorbing spring and guide rod, facilitating maintenance, repair, and replacement, thereby further improving the performance of the air spring and the composite air suspension system.

Description of Drawings

Figure 1: Front sectional structural view of the composite air suspension structure for heavy-duty vehicles proposed by the utility model.

Figure 2: Front structural schematic diagram of the composite air suspension structure for heavy-duty vehicles proposed by the utility model.

Figure 3: Enlarged view of Part A in the composite air suspension structure proposed by the utility model.

Reference Numerals

Mounting plate

Shock-absorbing spring

Connecting plate

Fastening screw

Telescopic outer rod

Telescopic inner rod

Connecting groove

Limiting block

Installation groove

Movable rod

Return spring

Limiting groove

Ball

Rubber sealing sleeve

Detailed Description

Referring to Figures 1–3, the composite air suspension structure for heavy-duty vehicles includes two interconnected mounting plates 1, which are respectively fixed at both ends of the air spring. A detachable shock-absorbing spring 2 is installed between the two mounting plates 1. The shock-absorbing spring 2 can reduce the operating load of the air spring, thereby prolonging the service life of the air spring.

Connecting plates 3 are fixed at both ends of the shock-absorbing spring 2. Multiple fastening screws 4 are inserted at equal intervals on the outer side walls of the opposing sides of the two connecting plates 3. The fastening screws 4 pass through the connecting plates 3 and are threadedly connected to the two mounting plates 1 respectively, thereby enabling convenient installation and removal of the shock-absorbing spring 2 for easy replacement.

A detachable guide rod is installed between the two mounting plates 1. The guide rod includes a telescopic outer rod 5 and a telescopic inner rod 6 connected to each other, wherein the telescopic inner rod 6 is movably inserted into the telescopic outer rod 5. The telescopic outer rod 5 is threadedly connected to the mounting plate 1, and a connecting mechanism is provided between the telescopic inner rod 6 and the mounting plate 1.

When the air spring is subjected to stress deviating from the movement direction, the telescopic outer rod 5 and telescopic inner rod 6 squeeze against each other and offset the stress, thereby preventing damage to the air spring caused by excessive lateral stress and extending the service life of the air spring.

The connecting mechanism includes a connecting groove 7 formed on the mounting plate 1 and matched with the telescopic inner rod 6. A limiting block 8 is movably installed on the outer side wall at one end of the telescopic inner rod 6 away from the telescopic outer rod 5.

An installation groove 9 matched with the limiting block 8 is formed on the telescopic inner rod 6. Multiple movable rods 10 are uniformly and movably inserted into the inner side wall of the installation groove 9, and the ends of the movable rods 10 away from the installation groove 9 are fixedly connected to the limiting block 8. A return spring 11 is wound around the outer side wall of each movable rod 10, and both ends of the return spring 11 are fixed to the outer side wall of the limiting block 8 and the inner side wall of the installation groove 9 respectively, allowing the limiting block 8 to move freely in the horizontal direction.

A limiting groove 12 matched with the limiting block 8 is formed on the inner side wall of the connecting groove 7, and the limiting groove 12 extends to the outer side of the mounting plate 1. Multiple balls 13 are uniformly installed on the inner side wall of the limiting groove 12 and are in contact with the limiting block 8, thereby preventing shaking of the limiting block 8 and the telescopic inner rod 6.

A rubber sealing sleeve 14 matched with the limiting block 8 is fixedly installed on the inner side wall of the limiting groove 12, which not only facilitates pushing the limiting block 8 but also prevents foreign matter from entering and blocking the limiting groove 12.

In use, one end of the telescopic outer rod 5 is threadedly connected to one mounting plate 1, while one end of the telescopic inner rod 6 is inserted into the other mounting plate 1. After the telescopic inner rod 6 is fully inserted into the connecting groove 7, the return spring 11 restores its elastic force and pushes one end of the limiting block 8 into the limiting groove 12, thereby securing the limiting block 8, telescopic inner rod 6, and telescopic outer rod 5 between the two mounting plates 1.

When disassembly is required, the limiting block 8 is pushed outward from the limiting groove 12, allowing the limiting block 8, telescopic inner rod 6, and telescopic outer rod 5 to be conveniently removed from between the two mounting plates 1.

The above description only represents preferred embodiments of the utility model and does not limit the scope of protection of the utility model. Any equivalent substitutions or modifications made by persons skilled in the art within the technical scope disclosed by the utility model shall fall within the protection scope of the utility model.