Hydraulic distributor of hydraulic suspension device

Abstract

The invention discloses a hydraulic distributor of a hydraulic suspension device. The hydraulic distributor is characterized in that two adjacent valve rod sections of a valve rod are correspondinglyprovided with an ascending speed control conical surface and a descending speed control conical surface, and when the hydraulic distributor is in an ascending working position, a pressure oil cavity and an oil return cavity of the hydraulic distributor are disconnected; and the valve rod and a valve body form an ascending speed throttling gap at the ascending speed control conical surface, a firstworking oil cavity is in communication with the pressure oil cavity through the ascending speed throttling gap, the second working oil cavity is in communication with the oil return cavity, and the axial displacement of the valve rod is controlled through an electric control unit, so that the throttling area of the ascending speed throttling gap can be changed, the ascending speed of a farm implement can be controlled, and similarly, the descending speed of the farm implement can also be controlled.

Description

technical field [0001] The invention relates to the technical field of hydraulic suspension devices for agricultural equipment, in particular to a hydraulic distributor for hydraulic suspension devices. Background technique [0002] The hydraulic suspension device of agricultural equipment (such as tractors) is used to connect suspended or semi-suspended agricultural implements, perform agricultural implement lifting and plowing depth adjustment, and realize loading and hydraulic power output, etc. The hydraulic suspension device consists of a hydraulic system and a suspension mechanism. The hydraulic system includes an oil pump, a distributor, a lifting cylinder, and an oil cylinder control mechanism. The suspension mechanism includes an upper pull rod, a lower rod, and a lifting arm. On the one hand, by manipulating the distributor, the raising, lowering, neutralization and floating of the agricultural implements can be realized, so that the tractor has the functions of po...

AI Technical Summary

Problems solved by technology

[0005] 1) When the agricultural equipment is in the farming state, frequent use of the pressure of the main oil circuit will cause waste of system energy;

[0006] 2) Using four solenoid valves to control the movement of the spool, the structure is complex

[0015] During transition operations, due to the difference in effective cross-sectional area between the rod chamber and the rodless chamber of the lifting cylinder, when the cylinder body of the lifting cylinder moves upwards instantaneously relative to the piston rod, the volume of hydraulic oil flowing out of the rodless chamber is more than The volume of hydraulic oil required by the rod cavity affects the shock absorption effect; similarly, when the cylinder body of the lift cylinder moves down instantly relative to the piston rod of the lift cylinder, the volume of hydraulic oil flowing out of the rod cavity is less than that without The volume of hydraulic oil required by the rod chamber, the rodless chamber will form a vacuum, causing cavitation

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