Central Bracket for Semi-Trailer Suspension

Technical Field

This utility model relates to the field of vehicles and engineering, and in particular to a central bracket for semi-trailer suspension.

Background Technology

A semi-trailer suspension system generally includes a front bracket, a central bracket, a rear bracket, a front leaf spring assembly mounted between the front bracket and the central bracket, and a rear leaf spring assembly mounted between the central bracket and the rear bracket.

The central bracket is provided with an equalizer beam into which the ends of the front and rear leaf spring assemblies are inserted. The equalizer beam is hinged to the central bracket via a pivot pin, while the lower end of the central bracket is connected to a tie rod.

Such a structural arrangement causes wear among the equalizer beam, pivot pin, and tie rod during operation, leading to degradation of the structural integrity of the central bracket. This adversely affects the performance of the suspension system and may pose safety risks to the semi-trailer during operation.

Summary of the Invention

To address the above technical issues, the utility model provides a central bracket for semi-trailer suspension with a simple structure, strong practicality, and significantly improved service life.

Technical Solution

The central bracket for semi-trailer suspension comprises:

Two parallel vertical plates

A U-shaped reinforcing plate arranged between the two vertical plates

Key features include:

The edges of the vertical plates are formed with outward flanges

The middle portion of each vertical plate is designed with a convex outer surface and a concave inner surface

Annular bosses are symmetrically arranged on the outer sides of the middle portions of the two vertical plates

Bushings for mounting the equalizer beam are arranged on the annular bosses

A preset number of reinforcing ribs are arranged circumferentially around the bushings on the annular bosses

Rectangular wear plates are sleeved on the bushings and symmetrically arranged on the inner sides of the vertical plates

The rectangular wear plates are flush with the inner wall at the upper opening of the vertical plates

Bolts are arranged around the rectangular wear plates for fastening them to the vertical plates

Additionally:

Tie rod sleeves are symmetrically arranged on the inner lower portions of the two vertical plates and embedded within them

One end of each tie rod sleeve (near the vertical plate) is provided with Ring I, and the other end is provided with Ring II

The outer diameter of Ring I is smaller than that of Ring II

Reinforcing ribs are arranged circumferentially between Ring I and Ring II

An arc-shaped reinforcing plate is arranged above the tie rod sleeves between the two vertical plates

Further Improvements

A wear-resistant sleeve (Wear Tube I) is integrally formed inside the bushing

A wear-resistant sleeve (Wear Tube II) is integrally formed inside the tie rod sleeve

The bolts used are round-head square-neck bolts

Beneficial Effects

The annular bosses and reinforcing ribs ensure a reliable connection between the bushings and vertical plates, enhancing overall strength

The wear-resistant sleeve inside the bushing effectively prevents wear caused by the pivot pin

The convex-concave structure of the vertical plates allows the rectangular wear plates to be flush with the inner wall, preventing wear from the equalizer beam while maintaining its proper operation

The structural design of the tie rod sleeve, including Ring I, Ring II, and reinforcing ribs, significantly improves strength and load-bearing capacity

The wear-resistant sleeve inside the tie rod sleeve effectively reduces wear from the tie rod

Overall, these improvements significantly enhance the durability and service life of the central bracket.

Description of Drawings

Figure 1: Front view structural diagram of the utility model

Figure 2: Left-side full sectional view

Reference numerals:

Vertical plate

U-shaped reinforcing plate

Annular boss

Bushing

Wear Tube I

Reinforcing rib

Rectangular wear plate

Tie rod sleeve

Wear Tube II

Ring I

Ring II

Reinforcing rib

Arc-shaped reinforcing plate

Bolt

Detailed Description of Embodiment

With reference to Figures 1 and 2, the utility model is further described in detail.

The central bracket comprises two parallel vertical plates (1) and a U-shaped reinforcing plate (2) arranged between them. The edges of the vertical plates (1) are outwardly flanged, and the middle portion is designed with a convex outer surface and concave inner surface.

Annular bosses (3) are symmetrically arranged on the outer sides of the middle portions of the vertical plates (1), on which bushings (4) for mounting the equalizer beam are installed. Reinforcing ribs (5) are arranged circumferentially on the bushings (4).

Rectangular wear plates (6) are mounted on the bushings (4), symmetrically arranged on the inner sides of the vertical plates (1), and are flush with the inner wall at the upper opening. Bolts (9) are used for fastening.

Tie rod sleeves (7) are symmetrically embedded in the lower inner portions of the vertical plates (1). Each tie rod sleeve (7) is provided with Ring I (72) and Ring II (73), with reinforcing ribs (74) arranged between them. An arc-shaped reinforcing plate (8) is arranged above the tie rod sleeves between the vertical plates.

Further, wear-resistant tube I (41) is integrally formed within the bushing (4), and wear-resistant tube II (71) is integrally formed within the tie rod sleeve (7). The bolts (9) are round-head square-neck bolts.

Working Principle

Since both the front and rear leaf springs are inserted into the equalizer beam, and the equalizer beam is mounted on the central bracket, the central bracket ultimately bears the load transmitted by the leaf springs.

The annular bosses (3) and reinforcing ribs (5) enhance the strength and connection of the bushings (4), while the wear-resistant tube I (41) prevents wear caused by the pivot pin.

Unlike conventional designs, the convex-concave structure of the vertical plates ensures that the rectangular wear plates (6) are flush with the inner wall, preventing interference with the equalizer beam while avoiding wear on the vertical plates.

The reinforced structure of the tie rod sleeves (7), combined with wear-resistant tube II (71), enables them to withstand higher tensile loads and reduces wear, thereby significantly extending the service life of the central bracket.

Scope of Protection

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