"Bucket bucket is not in place" phenomenon is that after the loader working device for a period of time, the bucket on the bucket limit block can not touch the arm, and the angle of the bucket can not reach the specified value.
The occurrence of this phenomenon is mainly due to the insufficient strength of the structural parts in the working equipment and the occurrence of 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 the work experience, we analyzed that the plastic deformation condition and several overlooked, especially raised here, so that everyone in the future design work on the analysis of the structure strength of the working device can be considered.
We are in the design of working device, 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 motion, the bucket bucket limiting block is always close in 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 by 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 actual work, the bucket forces the pull rod to pull the rocker arm back to the piston rod of the tipping bucket because of the limitation of the limit block of the bucket. The piston rod of the tipping bucket is pushed back, and the oil is injected into the oil tank by the front cavity oil filling valve of the tipping bucket cylinder, and the back cavity unloading valve is returned to the oil. In general, the opening pressure of the rear chamber relief valve is 1.25 times the system pressure of the operating hydraulic system.