Vibration damping device of loader

Abstract

The invention discloses a vibration damping device of a loader. The device is characterized by comprising a two-position four-way electromagnetic reversing valve, a pressure control valve and an energy accumulator, wherein a P1 port of the two-position four-way electromagnetic reversing valve communicates with the energy accumulator, a T1 port communicates with an oil tank, an A1 port communicateswith a rodless cavity of a movable arm oil cylinder, and a B1 port communicates with a rod cavity of the movable arm oil cylinder. When a coil of the two-position four-way electromagnetic reversing valve is powered on, the P1 port communicates with the A1 port, and the port B1 communicates with the T1 port. When the coil of the two-position four-way electromagnetic reversing valve is powered off,the A1 port, the P1 port, the T1 port and the B1 port do not communicate with one another. The pressure control valve is used for controlling the pressure of the P1 port to be the same as that of theA1 port. The vibration damping device of the loader is simple in structure, compact in size and capable of effectively realizing buffering and vibration damping of the loader.

Description

technical field [0001] The invention belongs to the technical field of loaders, and in particular relates to a vibration damping device for a loader. Background technique [0002] The wheel side support of the loader is rigidly connected to the frame, and the exciting vibration caused by the uneven road surface is completely borne by the four tires. When the loader is driving or working, the boom cylinder does not move, and the boom, boom cylinder, and front frame are similar to rigid connections at this time. Swinging sometimes causes the rear axle to leave the ground, and the driver's body swings with the vehicle at this time, making it difficult to control and driving comfort is very poor. Because the working device, heavy objects and other parts of the machine body will react to the bumpy bottom or obstacles, strong vibration and impact will be generated, which seriously affects the ride comfort and stability of the whole machine. This kind of vibration during the driv...

AI Technical Summary

Problems solved by technology

[0004] (1) In the above two technologies, because the electromagnetic valve is used to control the accumulator to communicate with the rodless chamber of the boom cylinder for liquid filling during a certain operation process, the unequal load will cause problems in the realization of When the vibration reduction function is used, the pressure of the boom cylinder is not equal to the pressure of the accumulator, so that the boom cylinder suddenly extends or retracts, which in turn causes the bucket material to scatter;

[0005] (2) In the above two technologies, when the pressure of the accumulator is low, if the accumulator is filled with liquid during the operation, the output flow of the hydraulic pump will first enter the accumulator, and then drive the boom cylinder to move , so that the boom appears weak and unable to work normally

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