An eccentric device is added between the gooseneck and the cargo platform to achieve a rigid connection. Through structural analysis, the rationality of the eccentric device is proved. On this basis, a finite element model of the gooseneck structure is established, and ANSYS software is used to calculate the stress distribution of the gooseneck structure under the maximum load, which provides a theoretical reference for the design of the gooseneck.
The characteristics of the car are as follows: (1) The gun-car structure is adopted, which can obviously reduce the unevenness of the load on each wheel and make the load distribution reasonable. 2) The body adopts a retractable structure, which can adjust the length of the body according to the change of the tank length, and expand the scope of transportation of goods. Among them, the cargo platform can be raised by 300 from the lowest ground height (2) During loading and unloading, the cargo platform b is in contact with the ground. At this time, operating the tank can effectively reduce the deformation of the frame. After the tank body is installed, the tank body and the cargo platform are tied together with steel wire ropes. In this way, the rigidity of the tank body can be used during transportation, thereby reducing the requirements for the rigidity of the cargo platform design. (3) The cargo platform has a lifting function. The lifting of the front part is realized by controlling the gooseneck trailer part, and the lifting of the rear part is realized by the rear module. In the design process of the trailer, since the gooseneck is responsible for multiple functions such as traction, lifting, and connection, how to realize the above functions and meet the requirements of strength and rigidity has become the focus of this vehicle.
The gooseneck part is composed of a traction pin, a lifting hydraulic cylinder, a pin shaft connected with the cargo platform, an eccentric block for fixing the position of the gooseneck, and a gooseneck. The gooseneck part is connected to the cargo platform by articulation, and a pair of lifting hydraulic cylinders are installed between the gooseneck and the cargo platform, which are driven by the hydraulic cylinder to realize the raising and lowering of the cargo platform.
After the cargo platform is raised or lowered, the position of the gooseneck lowboy trailer and the cargo platform is fixed by an eccentric device. The eccentric device is welded by 16Mn steel plate and steel pipe, installed in the hollow of the gooseneck web, and connected with the gooseneck through a pin. The eccentric device has 2 plane positions. Through these 2 plane positions, it is in contact with the upper surface of the cargo platform, that is, the cargo platform is in contact with the ground: when the cargo platform rises, under the action of gravity, the right plane turns to the bottom, and it can be unloaded at this time The oil pressure and the load are completely carried by the eccentric device. This position corresponds to the highest position of the cargo platform, that is, the position during transportation.
3 Mechanical sub-trailer of the gooseneck part during transportation, the force of the gooseneck is more complicated. In combination, there are the support reaction force at the traction pin, the support reaction force of the eccentric device, and the support reaction at the hinge joint between the gooseneck and the cargo platform. The force, the gravity of the gooseneck, the friction at each contact. Since the gravity of the gooseneck has a small value compared with other forces, the influence of gravity is ignored: at the same time, the influence of friction at each contact is ignored. Only the influence of the support reaction force at the traction pin, the support reaction force of the eccentric device, and the support reaction force at the hinge joint between the gooseneck and the cargo platform are considered. Among them, the direction of the supporting reaction force of the eccentric device to the gooseneck is perpendicular to the cargo platform. The three-force balance converging principle and considering the balance of the whole vehicle can calculate the supporting reaction force acting on the hinge joint of the gooseneck trailer and the cargo platform. The horizontal force is 500 KN, the vertical downward force is 4 000 KN.
Through the video below, you can learn about different types of removable gooseneck semi trailers (like lowboy trailer , detachable gooseneck , rgn lowboy , removable gooseneck , gooseneck trailer)
And the process, testing, packaging and customer feedback, etc.
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