Safety device for mechanical arm

The invention belongs to the technical field of mechanical arm equipment and particularly relates to a safety device for a mechanical arm. The safety device comprises a box. A horizontally-placed lifting plate is mounted in the box, and a horizontally-placed second fixing block is arranged on one side of the upper surface of the bottom of the box. A second sliding groove is formed in the second fixing block, and a second sliding block is slidably connected into the second sliding groove. A push rod motor is fixedly connected to the side, close to the second fixing block, of the upper surface of the bottom of the box, and a telescopic rod in the horizontal direction is mounted at the output end of the push rod motor. A first fixing block is fixedly connected to the side, close to the secondfixing block, of the lower surface of the lifting plate. A sliding groove is formed in the first fixing block, and a first sliding block is slidably connected into the sliding groove. The defects ofthe prior art are overcome