Tie Rod for Semi-Trailer Suspension

Technical Field

The utility model relates to the technical field of semi-trailer suspension components, in particular to a tie rod for a semi-trailer suspension.

Background Art

The function of a suspension tie rod in a semi-trailer is to enhance the rigidity of the vehicle itself and improve stability during high-speed cornering. It exerts a pulling force on the suspension spring, effectively holding the leaf spring so as to prevent breakage at the connection between the leaf spring and the bracket, thereby improving stability when cornering.

However, the existing tie rod structures are not reasonably designed, have poor adjustability, and suffer from unstable connections under mechanical vibration.

To address the above problems, utility model patent CN201620519171.X discloses a pull arm for a trailer, which is used to fix and adjust the suspension system of the trailer body. It includes a rod, connection heads at both ends, and a clamping assembly between the rod and the connection heads. The clamping assembly consists of two symmetrical clamping bodies and clamping bolts used to secure the clamping bodies to the rod. By modifying the connection structure between the rod and the connection heads, only part of the pull arm needs to be adjusted during maintenance and calibration, without large-scale disassembly of the trailer frame, thereby saving time and labor and reducing maintenance costs.

However, in this design, the load-bearing relies solely on the clamping assembly, resulting in low reliability. Additionally, during assembly and use, it cannot ensure that the end faces of the connection heads at both ends of the rod lie in the same plane, leading to low practicality.

Summary of the Invention

To solve the above technical problems, the utility model provides a semi-trailer suspension tie rod with a simple structure, high reliability, and strong practicality.

Technical Solution

The utility model is implemented as follows:

The semi-trailer suspension tie rod includes a connecting rod and connection heads arranged at both ends of the connecting rod.

The connecting rod comprises a first cylinder, with second cylinders symmetrically arranged at both ends of the first cylinder. The diameter of the second cylinders is smaller than that of the first cylinder. A preset number of strip-shaped protrusions are evenly arranged along the axial direction on the second cylinders, and a preset number of through holes I are also evenly arranged along the axial direction.

Each connection head includes a sleeve and a tie rod end mounted on the sleeve. A preset number of strip-shaped grooves are formed on the inner circumferential wall of the sleeve, matching the shape of the strip-shaped protrusions. Rectangular plates are symmetrically arranged on the outer wall of the sleeve, and a preset number of through holes II are formed on the rectangular plates. The through holes II correspond to the through holes I. Fasteners are inserted through the aligned holes I and II to connect the sleeve and the second cylinders.

Further Features

The tie rod end is connected to the sleeve by welding.

The fasteners include bolts and nuts.

The rectangular plates are welded onto the sleeve.

Beneficial Effects

The strip-shaped protrusions on the second cylinders and the strip-shaped grooves on the sleeve ensure reliable positioning between the connecting rod and the connection heads, thereby ensuring that the end faces of the tie rod ends are in the same plane.

The arrangement of multiple through holes I and II ensures a reliable connection between the connecting rod and the connection heads, enabling the structure to withstand greater tensile force. At the same time, the multiple holes allow the length of the tie rod to be adjusted according to specific working conditions, providing strong practicality.

Description of Drawings

The utility model will be further described in detail with reference to the accompanying drawings:

Fig. 1: Front view of the structure

Fig. 2: Top view of the structure

Fig. 3: Sectional view along A-A in Fig. 1

Fig. 4: Sectional view along B-B in Fig. 1

Reference numerals:

1 – Connection head

11 – Tie rod end

12 – Sleeve

121 – Rectangular plate

122 – Through hole II

123 – Strip-shaped groove

2 – Connecting rod

21 – First cylinder

22 – Second cylinder

221 – Strip-shaped protrusion

222 – Through hole I

3 – Fastener

Detailed Description of the Embodiment

As shown in Figs. 1–4, the semi-trailer suspension tie rod includes a connecting rod (2) and connection heads (1) arranged at both ends.

The connecting rod (2) includes a first cylinder (21), with second cylinders (22) symmetrically arranged at both ends. The second cylinders have a smaller diameter than the first cylinder. A preset number of strip-shaped protrusions (221) and through holes I (222) are evenly arranged along the axial direction.

Each connection head (1) includes a sleeve (12) and a tie rod end (11). The inner wall of the sleeve (12) is provided with strip-shaped grooves (123) matching the protrusions (221). Rectangular plates (121) are symmetrically arranged on the outer wall of the sleeve, with through holes II (122) corresponding to the through holes I (222). Fasteners (3) pass through these holes to securely connect the sleeve (12) and the second cylinders (22).

Working Principle

The strip-shaped protrusions on the second cylinders and the corresponding grooves on the sleeve ensure reliable positioning between the connecting rod and the connection heads.

Multiple through holes I and II allow the tie rod length to be adjusted according to actual working conditions, enhancing practicality. Meanwhile, the use of bolts and nuts as fasteners ensures a secure connection capable of withstanding greater tensile forces.

Scope of Protection

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