Quick locking tractor for trailer

Abstract

The quick locking tractor comprises a cast steel shell, a ball cavity and a mounting groove which are communicated with each other are formed in the two sides of the bottom end of the cast steel shell respectively, and an adjustable adjusting bolt is arranged in the ball cavity. When the locking assembly is rotated downwards, under the action of the limiting structure, the bottom sleeve gasket ring makes contact with the inner top wall of the cast steel shell, the compression spring has downward force, the clamping spring drives the pull rod to move downwards, the lifting inner block makes contact with the adjusting bolt, the ball head is effectively locked, and under the action of the compression spring, the clamping spring and the bottom sleeve gasket ring, the locking assembly is not prone to loosening; the tractor is simple in structure, convenient to operate and capable of achieving quick locking of equipment, the overall length is quite short due to the internal structural layout of the tractor, and the distance between the ball head and the pull rod on the rear portion is short. In this way, the moment borne by the pull rod is small when the pull rod is used. Due to the characteristic, the tractor can be used for a larger load and can be mounted on a large trailer, and the application range of the tractor is widened.

Description

technical field [0001] The invention relates to the technical field of automobile traction, in particular to a quick locking tractor for a trailer. Background technique [0002] The trailer hitch is an important device installed on the front of the trailer, and it is a connecting piece that connects the trailer ball and the trailer at the rear of the towing vehicle. When towing, the trailer hitch locks the towing ball head in the ball cavity, thus connecting the trailer to the towing vehicle in front. A key point in the design of the retractor is that the ball head cannot be pulled out when it is locked in the ball cavity. The pulling force required to pull out divides the load level of the retractor. [0003] After searching, Chinese patent discloses a kind of automobile traction anti-loosening locking device (publication number is CN110641235A), and this patented technology utilizes the structure cooperation of clamping lever, handle lever, connecting lever and connectin...

AI Technical Summary

Problems solved by technology

[0003] After searching, Chinese patent discloses a kind of automobile traction anti-loosening locking device (publication number is CN110641235A), and this patented technology utilizes the structure cooperation of clamping lever, handle lever, connecting lever and connecting bracket to form a locking mechanism. The mechanism can use the lever principle of the hinge four-bar mechanism to put the locking mechanism at the dead point, but when the locking mechanism is at the dead point, lock the safety lock block on the toggle lever to ensure that the locking mechanism is at the dead point The position cannot be moved, and then the safety plug is inserted, and the locking and separation operations are troublesome. It has many accessories and is difficult to assemble. At the same time, the load level is low, and it cannot be installed on a large trailer. Therefore, those skilled in the art provide a trailer The fast locking retractor that is used, to solve the problem that proposes in the above-mentioned background technology

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