Semi-Trailer Suspension Trailing Arm

Technical Field

The utility model relates to a trailing arm, in particular to a semi-trailer suspension trailing arm, belonging to the technical field related to semi-trailer suspensions.

Background Technology

A semi-trailer suspension system generally consists of elastic elements, guiding devices, shock absorbers, buffer blocks, and transverse stabilizers. Generally speaking, trailer suspension systems are divided into non-independent suspensions and independent suspensions. The suspension trailing arm is used to provide a certain traction effect for the suspension.

Existing semi-trailer suspension trailing arms are generally non-adjustable in length, which limits their application range. In addition, the load-bearing rod and the trailing arm body are not firmly connected in existing structures, and they are prone to separation under large traction forces, potentially causing accidents.

Utility Model Content

The purpose of this utility model is to provide a semi-trailer suspension trailing arm to solve the problems mentioned above, namely that existing suspension trailing arms have non-adjustable lengths and insufficiently secure connections between the load-bearing rod and the trailing arm body.

To achieve the above purpose, the utility model provides the following technical solution:

A semi-trailer suspension trailing arm comprises a trailing arm body. The trailing arm body includes a first trailing arm and a second trailing arm. The first trailing arm is positioned on one side of the second trailing arm. One end of the first trailing arm is provided with a first through-slot, and one end of the second trailing arm is provided with a second through-slot.

The bottom of the first trailing arm is fixedly connected with a third trailing arm through a first bolt and a first nut. One end of the third trailing arm is provided with a third through-slot.

The bottom of the second trailing arm is fixedly connected with a fourth trailing arm through a second bolt and a second nut. One end of the fourth trailing arm is provided with a fourth through-slot.

Preferred Technical Solutions

As a preferred technical solution of the utility model:

A first load-bearing pad is fixedly connected inside both the first through-slot and the third through-slot.

A second load-bearing pad is fixedly connected inside both the second through-slot and the fourth through-slot.

As another preferred technical solution:

A plurality of grooves are formed inside the first trailing arm, second trailing arm, third trailing arm, and fourth trailing arm.

As another preferred technical solution:

Load-bearing rods are engaged and connected between the first trailing arm and the third trailing arm, as well as between the second trailing arm and the fourth trailing arm, through the plurality of grooves.

As another preferred technical solution:

Semi-circular grooves are formed at the bottom of the first trailing arm and second trailing arm, and at the top of the third trailing arm and fourth trailing arm.

As another preferred technical solution:

A first rubber pad is fixed at the connection between the first bolt and the first trailing arm.

A second rubber pad is fixed at the connection between the second bolt and the second trailing arm.

A third rubber pad is fixed at the connection between the first nut and the third trailing arm.

A fourth rubber pad is fixed at the connection between the second nut and the fourth trailing arm.

Beneficial Effects

Compared with the prior art, the utility model has the following beneficial effects:

The first trailing arm and the third trailing arm are fixed together by the first bolt and first nut, while the second trailing arm and the fourth trailing arm are fixed together by the second bolt and second nut, thereby facilitating installation and disassembly of the suspension trailing arm.

The plurality of grooves formed inside the first trailing arm, second trailing arm, third trailing arm, and fourth trailing arm facilitate engagement and connection with the load-bearing rod, while also enabling adjustment of the overall length of the semi-trailer suspension trailing arm.

Description of Drawings

Figure 1: Structural schematic diagram of the semi-trailer suspension trailing arm.

Figure 2: Top-view structural schematic diagram of the semi-trailer suspension trailing arm.

Reference Numerals

Trailing arm body

First trailing arm

Second trailing arm

First through-slot

Second through-slot

First bolt

First nut

Third trailing arm

Third through-slot

Second bolt

Second nut

Fourth trailing arm

Fourth through-slot

First load-bearing pad

Second load-bearing pad

Groove

Load-bearing rod

Semi-circular groove

First rubber pad

Second rubber pad

Third rubber pad

Fourth rubber pad

Specific Embodiment

Referring to Figures 1–2, the utility model provides a semi-trailer suspension trailing arm including a trailing arm body 1. The trailing arm body 1 includes a first trailing arm 2 and a second trailing arm 3. The first trailing arm 2 is positioned on one side of the second trailing arm 3.

One end of the first trailing arm 2 is provided with a first through-slot 4, and one end of the second trailing arm 3 is provided with a second through-slot 5. The bottom of the first trailing arm 2 is fixedly connected with a third trailing arm 8 through a first bolt 6 and a first nut 7. One end of the third trailing arm 8 is provided with a third through-slot 9.

The bottom of the second trailing arm 3 is fixedly connected with a fourth trailing arm 12 through a second bolt 10 and a second nut 11. One end of the fourth trailing arm 12 is provided with a fourth through-slot 13.

Preferably, first load-bearing pads 14 are fixed inside the first through-slot 4 and third through-slot 9, while second load-bearing pads 15 are fixed inside the second through-slot 5 and fourth through-slot 13, preventing deformation caused by compression during installation.

Preferably, multiple grooves 16 are formed inside the first trailing arm 2, second trailing arm 3, third trailing arm 8, and fourth trailing arm 12 to facilitate engagement with the load-bearing rod 17, making the structure more compact.

Preferably, load-bearing rods 17 are connected between the first trailing arm 2 and third trailing arm 8, and between the second trailing arm 3 and fourth trailing arm 12 through grooves 16, thereby improving load-bearing capacity.

Preferably, semi-circular grooves 18 are formed on corresponding surfaces to facilitate installation and disassembly.

Preferably, rubber pads 19–22 are arranged at bolt and nut connection positions to improve tightness and connection stability.

Working Principle

During use, the appropriate length of the trailing arm is first adjusted by engaging the load-bearing rod 17 with different grooves 16.

The first trailing arm 2 and third trailing arm 8 are then fixed together using the first bolt 6 and first nut 7, while the second trailing arm 3 and fourth trailing arm 12 are fixed together using the second bolt 10 and second nut 11.

One end of the suspension trailing arm is connected to the semi-trailer suspension through the first through-slot 4 and third through-slot 9, while the other end is connected to the vehicle body through the second through-slot 5 and fourth through-slot 13.

The rubber pads arranged at the bolt and nut connections improve the tightness and stability between the connected trailing arm components.

Additional Notes

In the description of the utility model, positional terms such as “coaxial,” “bottom,” “top,” “inside,” “front,” and “side” are used only for convenience of description based on the drawings and should not be construed as limiting the utility model.

Similarly, terms such as “first,” “second,” “third,” and “fourth” are used only for descriptive purposes and do not indicate importance or quantity limitations.

Terms such as “installation,” “connection,” and “fixing” should be understood broadly, including fixed connections, detachable connections, integrated structures, direct or indirect connections, unless otherwise specifically defined.

Although embodiments of the utility model have been illustrated and described, those skilled in the art may make various modifications and substitutions without departing from the principles and spirit of the utility model, and the protection scope shall be defined by the appended claims and their equivalents.