Lifting collision protection device of crane

The utility model relates to a lifting collision protection device of a crane, which comprises a beam frame, a walking trolley is arranged on the beam frame, the bottom of the beam frame is fixedly connected with a supporting column, one end, far away from the beam frame, of the supporting column is fixedly connected with a round disc, and a driving motor is arranged on the round disc. A rotating rod is arranged at the output end of the driving motor, a rope is connected to the rotating rod in a winding mode, a hook is fixedly connected to the bottom of the rope, hydraulic telescopic rods are installed at the two ends of the bottom of the round disc, damping springs are arranged on the outer sides of the hydraulic telescopic rods in a sleeving mode, and arc-shaped pressure-resistant plates are fixedly connected to the bottoms of the hydraulic telescopic rods. 本实用新型涉及一种起重机的提升碰撞保护装置，包括梁架，所述梁架上安装有行走小车，所述梁架的底部固定连接有支撑柱，所述支撑柱远离梁架的一端固定连接有圆形盘，所述圆形盘上安装有驱动电机，所述驱动电机的输出端设置有转杆，所述转杆上缠绕连接有绳索，所述绳索的底部固定连接有挂钩，所述圆形盘底部的两端均安装有液压伸