A front hydraulic lifting device for a heavy truck dump truck

Abstract

The invention discloses a front hydraulic lifting device for a heavy self-dumping truck. The front hydraulic lifting device is characterized in that a power takeoff is a pneumatic power takeoff; an end cover (12) is additionally arranged on the power takeoff, and is fixedly connected with the end part of a separation and reunion shaft cylinder body of a power takeoff box body through a bolt; the middle part of the end cover is fixedly connected with an air inlet (13); the end face of a separation and reunion shaft is a plane or an arc-shaped surface; the wall of the separation and reunion shaft cylinder body of a clutch box body is provided with an O-shaped sealing ring groove which is embedded with an O-shaped sealing ring; a control air valve is provided with a valve end cover (21); the middle part of the valve end cover is fixedly connected with an air faucet (13); an air chamber is formed between the front end of a piston (22) and the valve end cover; the joint of the piston and a valve core (23) is designed into a T-shaped groove which is in clearance fit connection with a T-shaped boss on the end part of the valve core; the lower part of a hydraulic oil cylinder is fixedly arranged in the middle part of a front frame; and the upper part of the hydraulic oil cylinder is arranged in the center of the front part of a carriage.

Description

technical field [0001] The invention relates to a hydraulic lifting device for a dump truck, in particular to a front hydraulic lifting device for a heavy truck self-driving vehicle. Background technique [0002] At present, most of the lifting systems used by dump trucks in the domestic market are tripod enlarged lifting mechanism or double-cylinder lifting mechanism. Lifting mechanism. The applicable load capacity is 8-40 tons, and the length of the carriage is 4.4-6 meters. The tripod amplified lifting mechanism includes two kinds of lifting mechanisms, F type and T type, and the T type tripod lifting mechanism is also called the combined type of oil cylinder forward push and connecting rod. The closing height of the bottom plate of the compartment of the mechanism and the upper plane of the main frame is relatively large. Double-cylinder lifting mechanism, the double-cylinder lifting form is mostly used on 6×4 dump trucks, and a multi-stage cylinder is installed on bo...

AI Technical Summary

Problems solved by technology

The advantage of double-cylinder lifting is that the closed height between the carriage floor and the upper plane of the main frame is small: the disadvantage is that the hydraulic system is difficult to ensure the synchronization of the two hydraulic cylinders, the lifting stability is poor, and the overall rigidity of the carriage floor is high.

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