Telescopic oil cylinder, telescopic arm and crane

• Main Author: SHI LANFANG
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2024
• Subjects: BLASTING; CRANES; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HAULING; HEATING; HOISTING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIFTING; LIGHTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TRANSPORTING; WEAPONS

The utility model provides a telescopic oil cylinder, a telescopic arm and a crane, and relates to the technical field of hoisting mechanical equipment. The telescopic oil cylinder comprises a cylinder barrel and a piston rod which is arranged in the cylinder barrel in a sleeved mode and can stretch out and draw back relative to the cylinder barrel, a plurality of oil conveying pipelines are arranged in a rod body of the piston rod, and the oil conveying pipelines are coaxially arranged. Due to the fact that the multiple oil conveying pipelines are coaxially arranged in the rod body of the piston rod, compared with an existing mode that the multiple oil conveying pipelines are circumferentially distributed in an inner hole of the piston rod body, the piston rod can be suitable for the piston rod body with the small size, and therefore the problem that the multiple oil conveying pipelines are distributed in the piston rod body with the small size is solved. 本实用新型提供了一种伸缩油缸、伸缩臂及起重机，涉及起重机械设备技术领域。该伸缩油缸包括缸筒以及套设于缸筒内