Ascending and buffering extreme position limiter for crane

Abstract

The invention discloses an ascending and buffering extreme position limiter for a crane. The ascending and buffering extreme position limiter comprises a casing, a screw, a guide rod, a movable nut, a bearing, a screw plug, an end cover, a limiting switch, cross screws and a rubber ring, wherein a pressing plate, a reel, an arc cover and a liner are arranged inside the casing, the pressing plate, the arc cover and the liner in the reel are separately fixed by screws; the end cover is connected onto a reel base; the screw is arranged in the reel; the screw and the guide rod are movably connected by the movable nut; a right end port of the screw is connected and rotates through the bearing; the screw plug is arranged at a port of the guide rod; a limit switch is also arranged on the casing and is fixed in an end hole of the lower end of the movable nut through a hexagon nut and a hexagon bolt; end cover flexible braces (20) are arranged at the end part positions of the casing 1 and are made of soft materials; and the thickness of each end cover flexible brace (20) is 2 to 4cm.

Description

technical field [0001] The invention relates to the technical field of hoisting equipment application, in particular to a position limiter for the lifting pole buffer limit of a crane. Background technique [0002] At present, the lifting height limiter used on lifting and conveying machinery is a single stroke control. If this control fails, it will easily cause safety hazards. In order to improve the safety and reliability of the equipment, it is generally necessary to install additional rotary encoders to monitor the position and speed of the moving facilities. The existing rotary encoders are all installed on one side of the mechanical coil, or on other positions on the same side as the height limiter. This structure not only increases the production cost and installation difficulty, but also increases the complexity of electrical wiring. workload. [0003] The existing lifting height limiter and its adjustment method use the hand-push cam to adjust its angle to trigge...

AI Technical Summary

Problems solved by technology

The existing rotary encoders are all installed on one side of the mechanical coil, or on other positions on the same side as the height limiter. This structure not only increases the production cost and installation difficulty, but also increases the complexity of electrical wiring. workload

[0003] The existing lifting height limiter and its adjustment method use the hand-push cam to adjust its angle to trigger the corresponding micro switch when debugging the design specified or customer-required limit position of the crane drum stop. This adjustment method is not that the cam is over The required angular position is that the corresponding micro switch is not triggered by the cam, which often needs to be adjusted repeatedly and takes a long time

Especially when debugging large-tonnage cranes and cranes with a large lifting range, the above-mentioned defects are more obvious. In addition, because the crane has a large impact on the end during the lifting process, it is necessary to increase the buffer equipment. indispensable

Images