A vibration damping device for a loader

Abstract

The invention discloses a vibration damping device for a loader, which is characterized in that it comprises a two-position four-way electromagnetic reversing valve, a pressure control valve and an accumulator, and the P1 port of the two-position four-way electromagnetic reversing valve is connected to the energy storage Connector, T1 port is connected with the fuel tank, A1 port is connected with the rodless chamber of the boom cylinder, B1 port is connected with the rod chamber of the boom cylinder; when the coil of the two-position four-way electromagnetic reversing valve is energized, the P1 port Port A1 is connected, and port B1 is connected to port T1; when the coil of the two-position four-way electromagnetic reversing valve is powered off, port A1, port P1, port T1, and port B1 are not connected to each other; the pressure control valve is used to control P1 The port pressure is the same as the A1 port pressure; the loader vibration damping device is not only simple in structure and compact in volume, but also can effectively realize loader shock absorption.

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...

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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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