​Semi-Trailer Leaf Spring Suspension System

Technical Field

The utility model belongs to the field of automotive suspension systems, and in particular relates to a leaf spring suspension system.

Background Art

Domestic and international road traffic regulations impose limits on the axle load of each individual axle of heavy-duty vehicles. Meanwhile, the development trend of heavy-duty trucks is toward higher load capacity, which necessitates an increase in the number of axles to ensure that axle loads do not exceed regulatory limits under full-load conditions.

In general, during loading, the vehicle frame tends to present a higher front and lower rear configuration, resulting in a gradual increase in load toward the rear section of the frame. Due to uneven load distribution among axles, certain axles may experience excessive wear, thereby affecting their service life.

Summary of the Invention

The purpose of this utility model is to provide a leaf spring suspension system with a simple structure, capable of addressing uneven load distribution among axles, thereby improving service life.

To achieve the above objective, the technical solution adopted is as follows:

The leaf spring suspension system comprises a frame, with several suspension assemblies arranged at the lower end of the frame. Each suspension assembly includes a leaf spring, a front hanger bracket, a rear hanger bracket, a tie rod, and an axle.

One end of the leaf spring is connected to the front hanger bracket, and the other end is connected to the rear hanger bracket. An upper clamping plate is arranged above the middle portion of the leaf spring, and an axle seat plate is arranged below the leaf spring.

The axle seat plate comprises a clamping plate and a clamping groove, in which the axle is positioned. A lower clamping plate is arranged at the bottom of the axle. The upper clamping plate and the lower clamping plate are connected by fastening bolts. The front hanger bracket is connected to the lower clamping plate via a tie rod.

The clamping plates in each suspension assembly have different thicknesses, decreasing sequentially from front to rear.

Preferred Embodiment

Preferably, three suspension assemblies are arranged at the lower end of the frame, namely a first suspension, a second suspension, and a third suspension. The thicknesses of the clamping plates in these suspensions are 41 mm, 28 mm, and 15 mm, respectively.

Beneficial Effects

The leaf spring suspension system of the utility model includes three suspension assemblies, each having clamping plates of different thicknesses that decrease from front to rear. This configuration compensates for differences in the horizontal height of each axle, ensuring uniform load distribution among all axles during operation.

As a result, excessive wear on certain axles is avoided, the overall service life of the axles is improved, and the system is advantageous for widespread industrial application.

Description of Drawings

Figure 1: Structural schematic diagram of the utility model

Figure 2: Enlarged partial view of Figure 1

Reference numerals:

Frame

Suspension assembly

First suspension

Second suspension

Third suspension

Leaf spring

Front hanger bracket

Rear hanger bracket

Upper clamping plate

Axle

Axle seat plate

Clamping plate

Clamping groove

Lower clamping plate

Connecting bolt

Tie rod

Detailed Description

As shown in Figure 1, the leaf spring suspension system comprises a frame (1), with multiple suspension assemblies (2) arranged at the lower end of the frame (1). Each suspension assembly (2) includes a leaf spring (3), a front hanger bracket (4), a rear hanger bracket (5), a tie rod (11), and an axle (7).

One end of the leaf spring (3) is connected to the front hanger bracket (4), while the other end is connected to the rear hanger bracket (5). An upper clamping plate (6) is arranged above the middle portion of the leaf spring (3), and an axle seat plate (8) is arranged below it.

The axle seat plate (8) includes a clamping plate (81) and a clamping groove (82), in which the axle (7) is mounted. A lower clamping plate (9) is arranged beneath the axle (7). The upper clamping plate (6) and the lower clamping plate (9) are connected via connecting bolts (10). The front hanger bracket (4) is connected to the lower clamping plate (9) through the tie rod (11).

The clamping plates (81) in each suspension assembly (2) have different thicknesses, decreasing progressively from front to rear.

Three suspension assemblies (2) are arranged at the lower end of the frame (1), namely the first suspension (21), second suspension (22), and third suspension (23). The thicknesses of the clamping plates (81) are 41 mm, 28 mm, and 15 mm, respectively.

This configuration balances the differences in axle height, ensures uniform load distribution across all axles, prevents excessive wear, and improves the overall service life of the axles, making it suitable for widespread application.

Except for the technical features described above, all other features belong to the prior art known to those skilled in the field.