Explain why the bucket of loader bucket is not in place
I believe that the master who has opened the loader has encountered more or less the condition that the loader bucket is not in place. The engineer of the loader in Guizhou has introduced the cause of this situation.
The phenomenon that the bucket is not in place is that after the working device of the loader works for a period of time, the bucket stop block on the bucket can not contact with the boom, and the angle of the collecting bucket can't reach the specified value.
The occurrence of this phenomenon is mainly due to the insufficient strength of the structural parts in the working device and the plastic deformation. We are in the design of working device, checking the intensity of working equipment is often inserted into the material rise in the loader full load stress analysis, we tend to think that in this condition, the work force is the largest unit. In fact, according to our work experience, we think that there are several neglected cases in plastic deformation work. We put it here for you to consider in the future design work.
The first case:
Remind us in the design of working device of loader when Guiyang direct injection, in order to prevent spillage in the transport material loader, double hinge point bucket cylinder connected with the front frame by adjusting the working device from the ground receiving bucket position to the highest point of the transport position provisions of this circular movement, bucket bucket limit a block is always close in on the boom, so that we can protect the working device to prevent the material from the impact of scattered, but also can simplify the operation of the driver, not the ground receiving bucket, to transport position, then operate the collection bucket action. This kind of function is what we often say "block function".
Through the trajectory, we found that careful analysis, with the function of the working device without close bucket limiting block limit, working device from the ground receiving bucket position to the highest point of the transport position provisions of this circular motion, the relative angle between bucket and boom is gradually reduced. In practical work, the bucket forces the rod to pull the rocker arm and press back the piston rod of the bucket cylinder due to the limitation of the bucket limit block. The piston rod of the bucket cylinder is pressed back into the oil through the front cavity filling valve of the bucket cylinder and the back chamber discharge valve to return the oil. Generally speaking, the opening pressure of the rear cavity discharge valve is 1.25 times that of the system pressure of the working hydraulic system.