Protective support

The utility model discloses a protective support which comprises a base, a lifting device, a fixing device and an adjusting device. The lifting device comprises a protective cap, a fixing column, an inner groove, a partition plate, a motor, a movable nut, a lead screw, a connecting block and a side groove, the top end of the base is fixedly connected with the fixing column, the inner groove is formed in the fixing column, and the movable nut is slidably connected into the inner groove. The motor is started, the motor drives the lead screw to rotate, the lead screw and the movable nut rotate in a threaded mode, the movable nut slides and moves upwards along the inner groove under the action of the lead screw, the movable nut drives the connecting block and the mounting base to move up and down, and therefore the height of the mounting base is adjusted, and then the protection height is adjusted. 本申请公开了一种防护支架，包括底座以及升降装置、固定装置和调节装置；所述升降装置包括防护帽、固定柱、内槽、隔板、电机、活动螺母、丝杆、连接块和侧槽，所述底座的顶端固定连接固定柱，所述固定柱的内部开设有内槽，所述内槽的内部滑动连接活动