| 摘要 |
A chuck contains eccentric cams installed with possibility of turning on cylindrical sliders inside a housing and which interact with an internal conical bore of nut, which envelops the housing, with possibility of turning of a cylindrical bushing, which has helical surface with angle of ascent that is not greater than the angle of self-braking, and in longitudinal grooves on the external surface of housing threaded bars are located with screw lugs located inside the helical grooves of nut with conical bore. For increasing the reliability of operation, efficiency and service life of chuck the helical surface of rotary cylindrical bushing is located on one of its ends and interacts with appropriate surface of additionally introduced fixed cylindrical bushing rigidly connected with the housing, and on the second end with flat surface of the rotary cylindrical bushing through additionally introduced rolling contacts it interacts with a retaining ring, which is connected with the threaded bars combined from the side of rolling contacts into one whole cylindrical shell. |
