Patent ID: 8282143

Claim:
A positioning device for positioning a cylindrical component defining a first cylindrical channel, comprising: a main body defining a cylindrical channel, the main body comprising a mounting portion formed at an end of the main body, the cylindrical channel of the main body extending through the mounting portion, the main body further defining at least two limiting depressions separately defined at an end surface of the mounting portion, and at least one pin hole extending through a corresponding limiting depression; at least two positioning assemblies rotatably fixed to an end of the main body, each positioning assembly comprising a pin and a curved connecting shaft; an end of the curved connecting shaft defining a first through hole positioned in the corresponding limiting depression, and the pin passing through the corresponding pin hole and the first through hole, the curved connecting shaft further comprising a pair of protruding ears separately extending outward from the end of the curved connecting shaft away from the first through hole, wherein each of the two protruding ears defining a second through hole; and a push rod movably fixed in the cylindrical channel of the main body to rotate the at least two positioning assemblies outwards to position the cylindrical channel of the cylindrical component.