Connecting device for towing trailer

Abstract

The invention discloses a connecting device for towing a trailer and belongs to the technical field of trailers. The connecting device comprises an outer sleeve with one end closed and the other end opened, and a connecting shaft, wherein a plugging cover is arranged in an open end of an outer pipe body and forms an enclosed chamber together with the outer sleeve; the connecting shaft is coaxial with the outer sleeve; one end of the connecting shaft is inserted into the outer pipe body from the closed end of the outer sleeve and from the outside in; the outer wall of the connecting shaft is connected with the closed end of the outer sleeve in an enclosed manner; a cylindrical piston block is arranged in the outer sleeve; the outer wall of the piston block is connected with the inner wall of the outer sleeve in an enclosed manner and fixedly connected with the end, inserted in the outer sleeve, of the connecting shaft; a plurality of liquid- permeable holes are formed in the piston block and run through the piston block in the axial direction of the outer sleeve; and the outer sleeve is filled with hydraulic oil. According to the connecting device, the flowing of the hydraulic oil can buffer the instantaneous towing force, caused when a vehicle body is started to move forward, so as to reduce the instantaneous impact on a universal joint to play a certain role in protecting theuniversal joint and thus to reduce the damage, caused by the instantaneous impact, to the universal joint.

Description

Technical field [0001] The invention belongs to the technical field of trailers, and in particular, is a trailer connecting device for trailers. Background technique [0002] A trailer is a vehicle that is towed by a car without its own power drive. A combination of one car (truck or tractor, forklift) and one or more trailers. Trucks and tractors are the driving sections of automobile trains and are called main vehicles. [0003] The driven vehicle section towed by the main vehicle is called a trailer. It is an important vehicle type for road transportation. The use of automobile and train transportation is the most effective and simple important means to improve economic efficiency. It has the advantages of speed, maneuverability, flexibility, safety, etc.; it can easily realize section transportation. [0004] The trailer whose total weight is borne by itself is called a full trailer, and usually a full trailer is also referred to as a trailer. The characteristic is that it h...

AI Technical Summary

Problems solved by technology

[0005] At present, the connection between the trailer and the front is usually directly connected by a connection structure such as a universal joint. When the front starts to move forward, the connection structure bears a large instantaneous tensile force, and the connection structure will be damaged during long-term use.

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