Oil cylinder, working device and excavator

• Main Authors: LIU SONGYANG, HU YANLONG, ZHOU KAIKUN, WANG YONG, QU LIHONG, SHI LIJING, SHI JIJIANG
• Format: Patent
• Language: Chinese; English
• Published: 20.09.2022
• Subjects: BLASTING; CYLINDERS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DREDGING; ENGINEERING ELEMENTS AND UNITS; FIXED CONSTRUCTIONS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; FOUNDATIONS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULIC ENGINEERING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; SOIL SHIFTING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model discloses an oil cylinder, a working device and an excavator. The oil cylinder comprises a cylinder barrel, an end cover, a piston, a piston rod and a steel pipe. The piston is arranged in the accommodating cavity of the cylinder barrel; the piston rod is of a hollow structure, penetrates into the containing cavity of the cylinder barrel from the through hole of the end cover and is connected with the piston, and the piston is driven by the piston rod to move. The steel pipe is arranged in an inner hole of the piston rod, and an annular channel is formed between the steel pipe and the inner hole of the piston rod. The lifting lug connector is installed on the piston rod located outside the end cover. A first oil channel is arranged in the steel pipe, a first oil port is arranged on the lifting lug connector and leads to the oil cylinder large cavity through the first oil channel, a second oil port is arranged on the piston rod outside the end cover, a second oil channel and a buffer groove a