Integrated control valve block for power gear shifting gearbox

Abstract

The invention discloses an integrated control valve block for a power gear shifting gearbox. The integrated control valve block comprises a valve body, a main pressure regulating valve, a back pressure valve and eight cavity holes, wherein the main pressure regulating valve and the back pressure valve are arranged in the valve body; each cavity hole is correspondingly connected with a solenoid valve, one solenoid valve is used for controlling a lockup clutch oil port, and the other seven solenoid valves are used for correspondingly controlling seven gear shifting clutch oil ports; and one pathof oil entering the valve body through an oil inlet flows to the solenoid valves and enters correspondingly connected clutches through the on-state solenoid valves to work, the other path flows through the main pressure regulating valve to enter a hydraulic torque converter, and the oil flowing out from the hydraulic torque converter enters a gearbox shell oil channel through the back pressure valve. The integrated control valve block is simple in structure and low in manufacturing cost, and can simultaneously control seventh gear clutches and one lockup clutch and achieve switching of twelvegears.

Description

Technical field [0001] The invention relates to an integrated control valve block for a power shift gearbox, belonging to the technical field of control valves. Background technique [0002] In the prior art, the integrated hydraulic shift control valve has the characteristics of concentrated functions and compact structure, and is widely used in the gearboxes of construction machinery such as loaders and graders. [0003] The prior art discloses an electro-hydraulic proportional control valve for an automatic gearbox of construction machinery, which is mainly composed of a main valve body, an upper partition, an oil transfer plate and a lower partition stacked from top to bottom. The main valve body includes a main pressure valve, a proportional pressure reducing valve and a valve body. The electro-hydraulic proportional control valve cannot simultaneously meet the functions of multi-clutch package control, lock-up clutch control, torque converter back pressure adjustment, oil te...

AI Technical Summary

Problems solved by technology

The electro-hydraulic proportional control valve cannot simultaneously satisfy functions such as multi-clutch package control, lock-up clutch control, hydraulic torque converter back pressure adjustment, oil temperature and oil pressure acquisition of a multi-gear gearbox; and its structure is complicated and the production cost is high. It is prone to oil leakage, and does not meet the requirements for space coordination with the torque converter and the box

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