​Front Bracket for Semi-Trailer Air Suspension

Technical Field

The utility model relates to the field of suspension technology, in particular to a front bracket for an air suspension.

Background Technology

Air suspension is a suspension system that uses air springs instead of traditional leaf springs. Due to its advantages such as light weight, good ride comfort, and high stability, it is widely used in buses and trucks. At present, it is also increasingly applied in trailers, especially tankers used for transporting hazardous materials.

Existing vehicle suspension systems include a suspension assembly and shock absorbers. The suspension assembly generally consists of a front bracket, a leaf spring guide arm, and an air spring. The front bracket is critical because one end is mounted on the frame, while the other end is connected to the axle via the leaf spring guide arm, jointly bearing the axle load together with the air spring.

However, the existing front brackets still have several problems:

The front bracket is usually connected to the I-beam frame by welding or bolting. Although rigid, cracks may occur at the upper part of the bracket during operation, leading to suspension failure.

Due to differences in shock absorber specifications or connection methods with the axle, it is often necessary to adjust the mounting position between the shock absorber and the front bracket. Existing solutions typically require changing the shock absorber specification or its connection method.

The leaf spring guide arm is connected to the front bracket via a positioning shaft. During operation, it gradually wears the inner wall of the bracket, reducing its service life.

Summary of the Invention

To solve the above technical problems, the utility model provides a front bracket for air suspension with a simple structure, strong practicality, and long service life.

Technical Solution

The front bracket for air suspension includes a bracket body and a top plate arranged on the bracket body.

The bracket body is a shell structure composed of three side plates and an L-shaped plate. The key features include:

Two parallel positioning holes (I) are arranged at the upper end of the bracket body for mounting shock absorbers.

A shaft tube passes through the bracket body at the positioning holes (I).

A positioning hole (II) for an auxiliary shock absorber is arranged on the right side of the bracket body, located at the lower right of positioning hole (I).

A positioning hole (III) for a leaf spring guide arm is arranged at the lower end of the bracket body.

A bushing is installed in positioning hole (III), and a rectangular wear-resistant plate is arranged on the bushing and fixed to the inner wall of the bracket body.

The top surface of the top plate is provided with a preset number of bolt holes (I).

Plastic bending plates are symmetrically arranged at the front and rear ends of the top plate, each provided with a preset number of bolt holes (II).

Reinforcing ribs are arranged between the top plate and the bracket body, located on the front, rear, and left sides.

Further Improvements

The bracket body is provided with a conical boss structure for fixing the shaft tube and another conical structure for fixing the bushing.

The diameter of positioning hole (I) is 25 cm, and the center distance between the two holes is 40 cm.

The diameter of positioning hole (II) is 15 cm.

The diameter of positioning hole (III) is 30 cm.

Two reinforcing ribs are arranged on both the front and rear sides, and one reinforcing rib is arranged on the left side.

Bolt holes (I) and bolt holes (II) are matched in size and position.

Beneficial Effects

The reinforcing ribs and plastic bending plates ensure high strength of the bracket and reliable connection with the frame.

Dual positioning holes (I) provide flexibility in shock absorber installation.

The positioning hole (II) enables installation of an auxiliary shock absorber, improving ride comfort and connection reliability.

The rectangular wear-resistant plate reduces wear caused by the leaf spring guide arm, significantly extending service life.

Description of Drawings

Figure 1: Front sectional view

Figure 2: Left view

Figure 3: Top plate structure

Reference numerals:

Bracket body

Positioning hole I

Positioning hole II

Positioning hole III

Bushing

Rectangular wear-resistant plate

Top plate

Plastic bending plate

Reinforcing rib

Shaft tube

Detailed Description

The front bracket includes a bracket body (1) and a top plate (7). The bracket body is a shell structure composed of three side plates and an L-shaped plate.

Two parallel positioning holes (I) (2) are arranged at the upper end, with a shaft tube (10) passing through them. A positioning hole (II) (3) is arranged on the lower right side, and a positioning hole (III) (4) is arranged at the bottom with a bushing (5) and a rectangular wear-resistant plate (6).

The top plate (7) is provided with bolt holes (I), and plastic bending plates (8) with bolt holes (II) are arranged at both ends. Reinforcing ribs (9) are arranged on the front, rear, and left sides.

Conical boss structures are used to fix the shaft tube and bushing securely, improving reliability.

Working Principle

Reinforcing ribs and bending plates enhance structural strength and ensure reliable connection to the frame.

Dual positioning holes allow flexible installation of shock absorbers while preventing interference.

The auxiliary positioning hole enables installation of an additional shock absorber for improved ride comfort.

The wear-resistant plate reduces internal wear, extending service life.

Installation Method

During installation:

Select the appropriate positioning hole (I) based on shock absorber specifications.

Install the shock absorber on the shaft tube.

Install an auxiliary shock absorber in positioning hole (II).

Mount the leaf spring guide arm on the bushing in positioning hole (III).

Bend the plastic plates and fix the bracket to the frame using bolts through the corresponding holes.

Scope of Protection

Any modifications, substitutions, or variations made by those skilled in the art without departing from the principle and spirit of the utility model shall fall within the scope of protection of this utility model.