A trailer arm assembly

Abstract

The invention discloses a trailer arm assembly. The trailer arm assembly comprises an L-shaped main arm, an adjusting arm and a traction interface assembly arranged on the adjusting arm, wherein the adjusting arm is slidably in positioned connection with a vertical arm of the main arm, a fixing limiting stopper for preventing the adjusting arm from being moved out is arranged at the lower end of the vertical arm, and a horizontal arm of the main arm is provided with a two-stage lock tongue driven by a lock cylinder. The L-shaped main arm and the adjusting arm are simultaneously locked by using one lock, a thorough anti-theft role is played, an anti-theft device is simplified, and anti-theft operation is simplified. The trailer arm assembly has the function of quickly replacing the adjusting arms having different functions, and the adjusting arms can be quickly adjusted in height and be locked. The trailer arm assembly is further provided with a mistaken opening preventing safety mechanism and a high-strength trailer arm provided with multiple traction interfaces to rapidly meet different traction demands. A water guiding groove is formed between positioning counter bored holes, quick water guide and decontamination in a severe environment are promoted, and smooth operation of the adjusting mechanism is ensured.

Description

technical field [0001] The invention belongs to the technical field of mechanical design and manufacture, in particular to the technical field of auto parts design and manufacture, in particular to a trailer arm assembly used for automobile traction and rescue. Background technique [0002] The trailer arm is a pendant with one end installed in the standard quick-insert square opening of the trailer bar of the car chassis, and the other end with a specific towing interface for connection. It is mainly used for attaching and towing trailers, broken-down motor vehicles, and other towing and carrying items. [0003] Publication number is that patents such as CN204451875U, CN1054459744A, CN302894654S disclose relevant height-adjustable trailer arms respectively. [0004] The basic principles of the above three patents are similar, all are adjusted by being installed on the L-shaped main arm, moving to a specified position within a specified range in the vertical direction to ma...

AI Technical Summary

Problems solved by technology

However, all this type of patented technology cannot solve the following technical problems at the same time: only one lock is used to lock the main arm and the adjusting arm at the same time to solve the anti-theft problem; the height of the adjusting arm is quickly adjusted in the locked state; the adjusting arm is flipped quickly and the adjusting arm with different functions Quick replacement; the adjustment arm supports more than two types of towing interfaces (trailer balls with different ball diameters have the same type of interface)

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