SELF-CENTERING CLAMPING DEVICE Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: slides 3 and 4 with clamping jaws interconnected through a screw mechanism are mounted inside a housing, the nuts of the mechanism being provided with right and left threads. The screw has a collar in its middle portion. The synchronizing unit is made up as a threaded bushing mounted for permitting axial locking inside the threaded opening of the cantilever. The bushing straddles the middle portion of the screw and can interact with its collar from one side and the end face of the nut arranged on the thread of the screw as well as can be axially locked from the other side. The other surface of the middle portion of the screw of the screw mechanism is provided with additional step whose large diameter is greater than the diameter of the thread. The length of the step somewhat exceeds the length of the threaded bushing that straddles it. The end face of the nut of the screw mechanism is in a contact with the additional step of the screw. EFFECT: enhanced reliability. 2 cl, 2 dwg