Buffering device and buffering control method for ascending and descending of forklift portal frame

Abstract

The invention discloses a forklift portal frame lifting and descending buffer device which comprises an outer portal frame, an inner portal frame and a lifting oil cylinder used for pushing the portal frames to move, the outer portal frame and the inner portal frame are connected in a sliding mode, and the forklift portal frame lifting and descending buffer device is characterized in that the lifting oil cylinder is connected with an oil supply part and a lifting control part; the oil supply part comprises a hydraulic oil tank, the hydraulic oil tank is connected with a gear pump, the gear pump is connected with an oil pump motor, an oil outlet of the gear pump is connected with a lifting electromagnetic valve, an oil outlet of the lifting electromagnetic valve is communicated with a lifting oil cylinder, and an oil return opening of the lifting oil cylinder is communicated with the hydraulic oil tank through a descending electromagnetic valve; the lifting height sensor is adopted for detecting the position of the portal frame in real time, different portal frame positions correspond to different oil pump motor rotating speeds and different electromagnetic valve opening degrees, in-place lifting buffering of the portal frame is achieved, and in-place lifting impact of the portal frame is reduced; a lifting height sensor is adopted to detect the position of the gantry in real time, different gantry positions correspond to different opening degrees of the electromagnetic valve, in-place descending buffering of the gantry is achieved, and in-place descending impact of the gantry is reduced.

Description

technical field [0001] The invention relates to the technical field of forklift gantry, in particular to a lifting and lowering buffer device and a buffer control method of a forklift gantry. Background technique [0002] Forklift is a commonly used industrial vehicle. Hydrogen fuel forklift is a new type of energy forklift with excellent development prospects. Hydrogen fuel forklift mainly works through forks. The forks are installed on the gantry and are driven by the up and down sliding of the gantry. The forks move up and down, and the current forklifts use the hydraulic lifting system to drive the gantry and the lifting and lowering of the forks. The existing hydrogen fuel forklift gantry lifting and lowering system only drives the oil pump through the motor. , and then drive the gantry to move through the hydraulic system. However, the working process of the hydraulic system is relatively linear. There is no lifting buffer system and a lowering buffer system. When the ...

AI Technical Summary

Problems solved by technology

[0002] Forklifts are commonly used industrial vehicles. Hydrogen fuel forklifts are a new type of energy forklifts with excellent development prospects. Hydrogen fuel forklifts mainly work through forks, which are installed on the mast and driven by sliding up and down the mast. The fork moves up and down, and the fork of the current forklift drives the lifting and lowering of the mast and the fork through the hydraulic lifting system. The existing hydrogen fuel forklift mast lifting and lowering system only drives the oil pump through the motor. , and then drive the mast to move through the hydraulic system. However, the working process of the hydraulic system is relatively linear. There is no lifting buffer system and descending buffer system. The impact is large when it is lifted and lowered, and it has a large impact on the mast, which is easy to damage the mast. , and it will also cause the fork to be unstable, and there may be a risk of the cargo falling

Images