knuckle joint

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A knuckle joint is a mechanical joint used to connect two rods that are under tensile load. It consists of one rod with a forked end (double eye) and another rod with a single eye. The single eye fits between the double eyes, and a pin is inserted through all three to secure the connection. This joint allows for angular misalignment in the same plane and is capable of handling large tensile loads but not large compressive loads.Parts of the Knuckle joint1.Double eye end (Fork)2.Single eye end3.Knuckle pin4.Collar5.Split pinConstruction and working of Knuckle jointThe end of one rod which is to be connected is made into a fork shape and is also known as the Fork or Yoke or Double-eye end as shown in the figure.One end of the rod which is to be connected is made into the fork shape. The other rod end is made into the single-eye end (the one with 1 hole).The single eye is placed between the 2 eyes of the fork end such that all the 3 holes (i.e. 2 of the fork end and 1 of the single end) coincide.A knuckle pin is used to connect the single eye and double eye together. The knuckle pin passes through the hole and connects them. It has a small hole in it at its end.A collar is placed at the end of the knuckle pin such that the hole in the collar coincides with the hole in the knuckle pin.A tapered pin is passed through the holes to secure the collar & knuckle pin and prevents them from sliding off.