Forklift multi-way valve operating mechanism with safety protecting function

Abstract

The invention relates to a forklift multi-way valve operating mechanism with a safety protecting function. The forklift multi-way valve operating mechanism comprises a safety protecting frame, a lifting manipulation handle, an inclined manipulation handle, a first accessory manipulation handle, a second accessory manipulation handle, a multi-way valve frame assembly and a frame type electromagnet, wherein the four manipulation handles are identical in structure and respectively mounted on the safety protecting frame. During working, in the condition that the frame type electromagnet is blackout, the safety protecting frame slides on a connection shaft under action of a reset spring, and the four manipulation handles are clamped by four pairs of upper and lower limiting pins on the safety protecting frame to enable the four manipulation handles to be incapable of manipulating freely, so that all actions of valve bodes of the multi-way valve are stopped; otherwise, when the frame type electromagnet is electrified, the four manipulation handles are unlimited by the upper and lower limiting pins and can turn on and turn off the valve bodies of the multi-way valve freely.

Description

technical field [0001] The invention belongs to the technical field of forklifts, and in particular relates to a multi-way valve control mechanism for loading and unloading operations of forklifts. Background technique [0002] In order to further improve the safety performance of forklifts, an operator presence sensing system, namely OPS system, has been proposed internationally. The OPS system refers to a safety system that senses whether the driver is sitting on the driver's seat in the correct posture through the seat sensor installed in the driver's seat. If the driver does not sit on the driver's seat in the correct posture or leaves the seat, the sensor has no signal input, and the driving force is cut off (automatic transmission vehicles only), and all loading and unloading operations will be stopped at the same time, avoiding the forklift Continue to work in an out-of-control state, causing unnecessary safety accidents. Foreign forklifts are usually configured by...

AI Technical Summary

Problems solved by technology

Foreign forklifts are usually configured by setting hydraulic locks or hydraulic unloading valves on the hydraulic oil circuit to realize the on-off of the hydraulic oil circuit, which meets the requirements of the OPS system, but the cost is high and it is difficult for users to accept it.

Some domestic hydraulic component manufacturers have also begun to develop this kind of hydraulic device, but this kind of hydraulic device has just been developed, the technology is immature, unreliable, and the cost is high, so it cannot be matched in batches on the whole machine

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