Connecting ring, also known as shackle, is a common connecting equipment in mechanical engineering. The common shackles in engineering include European large bow shackle, European large Dee shackle, round head shackle, square head shackle, D-shaped shackle, etc. In the rescue operation, shackle is usually called connecting ring, which is the necessary connecting equipment between steel wire ropes, between steel wire ropes and car body, between steel wire ropes and pulleys, between rigid traction frame and car body. According to different purposes, the form of connecting ring is also different. Commonly used are D-shaped connecting ring, double D-shaped connecting ring, connecting sleeve, etc. In addition, connecting ring also refers to a part of fishing tackle, which is a very small metal ring connecting brain line and main line.
The utility model is a hollow positive cylinder, the two rotating ring bodies form a convex large inlay part by one end of the first line rod, the other end bends the ring ring and then circles it on the straight section for positioning, the two rotating rings can be placed in the opening at both ends of the body by the convex large inlay part, and then be integrated by rolling and closing the pivot. Through the utility model, the opening at both ends of the body can obtain the horizontal uniform closing effect, so as to improve the combined tensile strength And flexibility for better rotation.
There are many kinds of shackles. According to the shape of the bent ring, there are two types: straight ring D-shaped and horse shoe shaped (bow shaped); according to the connection form of the pin and the bent ring, there are screw type and movable pin type.
The pin and bent ring of screw shackle are connected by thread. There are two kinds of pins for the loose pin type shackle, i.e. round and oval. It is in smooth contact with the curved ring hole and can be directly drawn out.