Gas lifting jack for excavator

Abstract

The invention discloses a gas lifting jack for an excavator and relates to the technical field of excavators. A piston rod and a piston are arranged in a cylinder body, one end of the piston rod is connected with the piston, the other end of the piston rod stretches out of one end of the cylinder body, and a first flying ring is arranged at the stretching-out end and connected to a rotary disc big frame of the excavator. The upper portion of the cylinder body is connected with a cylinder head, the cylinder head is fixed into the cylinder body through a cylinder cover, and a second flying ring is arranged at the other end of the cylinder body and connected to a big arm of the excavator. The piston divides the interior of the cylinder body into two cavities, the piston rod is arranged in one chamber serving as a rod end chamber, and the piston rod is not arranged in the other chamber serving as a non-rod end chamber. The rod end chamber is connected with a rod end chamber oil pipe of a big arm oil cylinder of the excavator, the non-rod end chamber is communicated with a high-pressure gas bottle, a first sealing structure is arranged between the piston and the cylinder body, a second sealing structure is arranged between the piston rod and the cylinder head, high-pressure nitrogen is used in the non-rod end chamber for work, hydraulic oil is used in the rod end chamber for work, the output power of an engine is reduced, and lifting force of a working device is improved.

Description

technical field [0001] The invention relates to a gas lifter for an excavator, belonging to the technical field of excavators. Background technique [0002] Due to the characteristics of wide range of use, large quantity, high fuel consumption and high exhaust emission of hydraulic excavators, it is of great significance and value to study the high efficiency and energy saving of hydraulic excavators. The oil cylinder of the excavator works by using the mechanical energy converted from the oil pressure energy input by the hydraulic pump, while the hydraulic pump needs to be connected with the engine flywheel casing through a coupling, and relies on the output power of the engine to drive the hydraulic pump to work. The cylinder of the hydraulic excavator adopts a double-acting hydraulic cylinder, and the movement of the piston in the two directions of the double-acting hydraulic cylinder is completed by alternately feeding oil through two chambers, and is completed by the ac...

AI Technical Summary

Problems solved by technology

The disadvantage is that this device needs to be connected with core components such as the hydraulic system of the excavator and the control valve. The old excavator that has been shipped is not easy to install; in addition, its principle structure increases the resistance when the boom of the excavator is lowered, and sometimes the excavator is working. Need to support the machinery itself, this resistance causes the excavator to be blocked when the working device is pressed down and cannot support the vehicle

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