Abstract: This application relates to folding trailers, specifically a bottom double-cross trailer. It has two first and two second vertical poles. Left and right support rods are between the two first vertical poles, and front and rear support rods are between the first and second vertical poles. A hanging rod is in the middle of the front and rear support rod group, with symmetrical left and right bottom cross rod groups on each side. The left bottom cross rod group connects to the first vertical pole, and the right to the second. The hanging rod's bottom is fixed to a base support piece. The left and right bottom cross rod groups connect via the hanging rod, and their attachment points to the base support piece rotate. The hanging rod provides upward tension to prevent collapse under load, enhancing load-bearing capacity.

Abstract: The disclosure relates to the field of outdoor use trailer, in particular discloses a side suspender non-sliding trailer, comprising a first vertical pole and a second vertical pole, a left and right connecting rod group is arranged between the first vertical pole and the second vertical pole, a bottom connecting rod group is arranged at the bottom of the first vertical pole and the second vertical pole, a first fixing sleeve and a second fixing sleeve are fixed at the top and bottom of the first vertical pole and the second vertical pole, and a sliding sleeve is arranged outside the first vertical pole and the bottom connecting rod group is arranged with a side suspender. The disclosure through the matching of the left and right link group and the sliding sleeve, so that the bottom of the trailer is lowered when folding, it can also ensure its structural stability.

Abstract: The application is for trailers, and specifically is a more stable gathering trailer, comprising a rod assembly, which includes four rods, an upper fixing part, a lower fixing part, and a middle movable part, and also includes a left-right contraction control assembly, a left-right contraction control assembly comprising a first right-left adjusting lever, second right-left adjusting lever, third right-left adjusting lever, fourth left-right adjusting lever, fifth right-left adjusting lever, sixth right-left adjusting lever, seventh right-left adjusting lever, and an eighth right-left adjusting lever; when the gathering trailer loaded with cargo, the first left-right adjusting lever, fifth left-right adjusting lever, fourth right-left adjusting lever and the eighth left-left adjusting lever are used.

Abstract: The invention relates to the trailer and particularly serves for a folding trailer, comprising a rod assembly, four vertical pipes, a linkage sliding sleeve, a left-right folding assembly and a front-back folding assembly, the left and right folding assemblies include six cross tubes, and the front-rear folding assemblies include two cross straight tubes and two cross bend tubes, to ensure that the intersections of the second and third cross tubes, as well as the fourth and fifth cross tubes, are shifted down, as is the intersection of the second cross elbow and the second cross straight tube; The highest point of the constricted second, third, fourth, and fifth crossovers shall be lower than the horizontal line of the vertex-angle fastener, which ensures the highest point of the contracted folding trailer is level with the highest point of the vertex angle fixing piece not to raise the contracted height.

Abstract: A method for processing a mortise of a small-size superalloy turbine disk using laser shock peening A laser shock peening (LSP) parameter of a laser shock peening (LSP) robot is designed. A spatial data of a motion trajectory of the LSP robot for a laser shock peening area of mortise teeth of the first mortise is found and recorded using a robot simulation system software to generate a trajectory program of the robot for the first mortise. Then a rotation program of an end of an arm of the LSP robot is written according to an included angle between two adjacent mortises to generate a trajectory program of the robot for all mortises of the turbine disk. Finally, the turbine disk is processed by laser shock peening.