Lightweight Three-Axle Suspension

Technical Field

The utility model relates to the field of automotive technology, and more particularly to a lightweight three-axle suspension system.

Background Art

A suspension system is a general term for the force-transmitting connection device between the vehicle frame and the axle or wheels. Its functions include transmitting forces and moments between the wheels and the frame, buffering impact forces transmitted to the frame or body, and attenuating vibrations caused thereby, so as to ensure smooth vehicle operation. The suspension system should support the vehicle body and improve ride comfort. Different suspension configurations provide different driving experiences.

In the prior art, automotive suspensions, particularly trailer suspensions, generally consist of support springs, spring brackets, and support shafts. To increase load capacity, the support springs are typically made of thicker steel plates, and the entire suspension is made of steel castings. This results in excessive weight, poor shock absorption, and reduced vehicle stability, comfort, and safety. Under the same load conditions, the service life of such suspensions is relatively short.

Summary of the Utility Model

To address the above issues, the utility model provides a lightweight three-axle suspension featuring strong buffering capacity, high load-bearing capacity, good stability, reduced weight, and longer service life under the same load conditions.

The technical solution is as follows:

The lightweight three-axle suspension comprises a front bracket, leaf spring, front support bracket, pin shaft, front equalizer bracket, rear support bracket, rear equalizer bracket, frame, rear bracket, front connecting rod, U-bolt, front axle, bushing, middle connecting rod, middle axle, rear connecting rod, rear axle, and pad plate.

It is characterized in that:

A front bracket is arranged at the lower front end of the frame, and a rear bracket is arranged at the lower rear end of the frame.

A front support bracket is arranged inside the front bracket, and its middle portion is connected to the front equalizer bracket via a pin shaft.

A rear support bracket is arranged inside the rear bracket, and its middle portion is connected to the rear equalizer bracket via a pin shaft.

Leaf springs are respectively arranged between the front bracket and front support bracket, between the front support bracket and rear support bracket, and between the rear support bracket and rear bracket.

Front axle, middle axle, and rear axle are respectively fixed at the middle portions of the leaf springs via U-bolts.

Both ends of the front connecting rod are mounted between the front bracket and the front axle via bushings.

Both ends of the middle connecting rod are mounted between the front support bracket and the middle axle via bushings.

Both ends of the rear connecting rod are mounted between the rear support bracket and the rear axle via bushings.

Pad plates are arranged on the upper sides of both ends of the leaf springs.

Further Features

Leaf Spring:
Pad plates are arranged between the leaf spring and the front bracket, front support bracket, rear support bracket, and rear bracket. The leaf spring is made of high-quality spring steel 60CrMnMoA, effectively reducing the weight of the suspension.

Pad Plate:
The pad plate is a three-layer structure:

Upper and lower layers: steel structure (material: 60CrMnMoA)

Middle layer: rubber structure (a मिश्रure of styrene-butadiene rubber and EPDM)

This structure improves wear resistance and shock absorption, enhances vehicle stability, and extends service life.

Bushing:
The bushing also adopts a three-layer structure:

Inner and outer layers: steel (60CrMnMoA)

Middle layer: rubber (styrene-butadiene rubber + EPDM)

This significantly improves wear resistance and buffering performance, enhancing stability and extending the service life of the connecting rods.

Equalizer Brackets:
The front and rear equalizer brackets are made of 65Mn steel with a thickness of 6–8 mm.

Brackets:
The front bracket, front support bracket, rear support bracket, and rear bracket are all made of 65Mn steel with a thickness of 6–8 mm.

Beneficial Effects

The lightweight three-axle suspension is equipped with pad plates and bushings featuring excellent elasticity and wear resistance. It provides strong shock absorption, high load-bearing capacity, good stability, reduced weight, and longer service life under the same load conditions.

Brief Description of Drawings

Figure 1 is a structural schematic diagram of the utility model, wherein:

Front bracket

Leaf spring

Front support bracket

Pin shaft

Front equalizer bracket

Rear support bracket

Rear equalizer bracket

Frame

Rear bracket

Front connecting rod

U-bolt

Front axle

Bushing

Middle connecting rod

Middle axle

Rear connecting rod

Rear axle

Pad plate

Detailed Description

With reference to Figure 1, the utility model is further described in detail as follows:

The lightweight three-axle suspension consists of the components listed above. The front bracket is arranged at the lower front end of the frame, and the rear bracket is arranged at the lower rear end. The front support bracket is arranged inside the front bracket and is connected to the front equalizer bracket via a pin shaft. The rear support bracket is arranged inside the rear bracket and is connected to the rear equalizer bracket via a pin shaft.

Leaf springs are arranged between the corresponding brackets, and the front, middle, and rear axles are fixed to the leaf springs via U-bolts. The connecting rods are mounted via bushings between the respective brackets and axles. Pad plates are arranged on the upper sides of both ends of the leaf springs.

The structural features of the leaf spring, pad plate, bushing, equalizer brackets, and other components are as described above.