Flexible-connection gear box electro-hydraulic control valve for forklift

Abstract

A flexible-connection gear box electro-hydraulic control valve for a forklift is characterized in that all valve bodies are integrated and arranged in parallel on the same one valve base; not only area reversing solenoid valve and a constant pressure valve arranged, but also an inching valve is also integrated together; and the same one energy-accumulating valve which can respectively accumulateenergy at a forward gear and a backward gear is arranged; the arrangement of oil circuits is characterized in that a main oil circuit is accessed into an oil circuit input port through a throttling valve and the inching valve in sequence; a forward gear oil port of the reversing solenoid valve is directly accessed into a forward gear hydraulic clutch and a backward gear oil port of the reversing solenoid valve is directly accessed into a backward gear hydraulic clutch; and in the main oil circuit, the constant pressure valve and the energy-accumulating valve are respectively arranged at one side of the oil circuit inlet end of the inching valve. The flexible-connection gear box electro-hydraulic control valve for the forklift is particularly applicable to the forklift of 1-3.5 tons, can reduce the occupied space of the valve body, facilitate the arrangement of other related functional pieces around the gear box, can increase the maintenance space and improve the work reliability.

Description

technical field [0001] The invention relates to an electro-hydraulic control valve for a forklift, more specifically an electro-hydraulic control valve for a soft connection gearbox for a 1-3.5 ton forklift. Background technique [0002] The gearbox and the frame of the traditional 1-3.5 ton forklift are rigidly connected, and the body vibration is large. In order to improve the comfort, reduce the vibration and improve the service life of the forklift, the soft connection gearbox came into being. The so-called soft connection is an elastic connection between the gearbox and the frame. The vibration of the frame will be absorbed by the elastic connection part, which has a protective effect on the gearbox. Work comfort. However, the existing electro-hydraulic control valves used in hard connections cannot be directly applied to soft connections due to the limited structural space. Specifically, since there is no micro-valve in the electro-hydraulic control valve, the micro-...

AI Technical Summary

Problems solved by technology

However, the existing electro-hydraulic control valves used in hard connections cannot be directly applied to soft connections due to the limited structural space.

Specifically, since there is no micro-valve in the electro-hydraulic control valve, the micro-valve as an essential component needs to be installed on the side of the gearbox as an independent assembly. This form not only occupies the surrounding space, but also increases the The complexity of the control connection part; in the existing structure, the forward oil circuit and the reverse oil circuit of the valve body need to be respectively equipped with an energy storage valve and a safety valve at the same time, which makes the volume of the electro-hydraulic control valve body Larger, the surrounding space of the gearbox body cannot be used reasonably

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