Reinforced semitrailer back-tipping carriage

Abstract

The invention discloses a reinforced semitrailer back-tipping carriage which comprises an auxiliary frame fixedly connected with a carriage body bottom plate and a main frame. The tail end of the main frame is hinged to the tail end of the auxiliary frame through a pin. The whole auxiliary frame is of a gooseneck shape and comprises an auxiliary frame front part, an auxiliary frame rear part and an auxiliary frame transition part, wherein the horizontal plane of the auxiliary frame rear part is lower than the auxiliary frame front part, and the auxiliary frame front part and the auxiliary frame rear part are connected through the auxiliary frame transition part. The whole main frame is of a gooseneck shape and comprises a main frame front part, a main frame rear part and a main frame transition part, wherein the horizontal plane of the main frame rear part is lower than the main frame front part, and the main frame front part and the main frame rear part are connected through the main frame transition part. The reinforced semitrailer back-tipping carriage is characterized in that two main longitudinal beams of the main frame rear part are fixedly connected with a lower cover plate through the upper cover plate close to the pin. Compared with the prior art, the reinforced semitrailer back-tipping carriage can bear large vertical load, large horizontal load and distortion force. Under circumstances such as carriage body rollover, distortion of the main frame can be prevented, normal driving can be achieved by centralizing the carriage body, maintaining cost is lowered, and the service life is prolonged.

Description

technical field [0001] The invention relates to a trailer, in particular to a compartment of a semi-trailer. Background technique [0002] For the compartment structure of the semi-trailer, many manufacturers, including the applicant, have paid more attention to achieve the goals of safety, stability and fast running. However, the compartments of existing semi-trailer dump trucks generally include an auxiliary frame and a main frame, and the auxiliary frame is fixed to the bottom plate of the car body. An oil cylinder lifts the head end and the middle part of the auxiliary frame so that the whole car body turns around the pin shaft to realize back turning and self-unloading. [0003] For example, the applicant once disclosed a semi-trailer dump truck compartment with the notification number CN201169302Y. The compartment has a narrow front and wide rear structure, which is not only convenient for unloading, but also not easy to rollover when the head end of the compartment i...

AI Technical Summary

Problems solved by technology

There is nothing wrong with this design concept, but it does not take into account that in actual transportation, due to road conditions and other reasons, the carriage as a whole will bump up and down, left and right, and because the rear of the carriage is lower than the front, the load on the rear will be heavier after loading the cargo. Large, as the saying goes (when riding in a car) swaying forward and backward, sitting in the middle of the kang, due to the heavy load on the rear, the amplitude of the left and right bumps is also the largest, and the impact force is also the largest. The maximum impact force acts on the rear longitudinal beam of the auxiliary frame The free ends of the beams on both sides are finally transmitted to the weld between the longitudinal beam and the beam, which is the junction of the two beams, and the internal stress is also the largest, which is the weak link. After a short time, the weld reaches the fatigue limit , it is easy to break from here, which is also a long-standing problem in this field

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