Telescopic arm structure, arm support assembly and engineering machinery

• Main Authors: YAN ZHI, HU PENGTIAN, GUO QINGHUA
• Format: Patent
• Language: Chinese; English
• Published: 23.08.2022
• Subjects: BLASTING; CRANES; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HAULING; HEATING; HOISTING; LIFTING; LIGHTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

The utility model provides a telescopic arm structure, an arm frame assembly and engineering machinery, and relates to the technical field of telescopic arms. The telescopic arm structure comprises a first arm frame, a second arm frame, a first telescopic oil cylinder and a buffering and supporting mechanism; the first arm frame is arranged on the second arm frame in a sleeving mode, the second arm frame is driven by the first telescopic oil cylinder to stretch out and draw back relative to the first arm frame in the first direction, the buffering and supporting mechanism is arranged on the first telescopic oil cylinder and is in contact fit with the inner wall of the second arm frame, and the buffering and supporting mechanism is used for providing buffering and supporting for the first telescopic oil cylinder in the second direction. According to the telescopic arm structure, the downward disturbance amount of the first telescopic oil cylinder is reduced, leakage and failure are avoided, and the reliability