| 摘要 |
Thread-milling machine incorporating one driving and one driven unit (14, 10), between which are provided means for the transfer of torque (22) permitting mutual axial displacement of the two units. Between the two units are mounted spring elements, one of which (36) is tensioned when the units are moved away from one another and the other (58, 60) being tensioned when the two units are moved in the opposite direction to this. The elements (34, 50) mounted between the spring elements are so arranged as to balance the freedom of movement of the units towards or away from each other from an initial position determined by the tension of the springs. The elements (34, 50) mounted between the spring elements are provided with pressure devices (88; 96; 108; 116) so designed as to increase the resistance to axial displacement of the units towards one another regardless of the preset positions of the units (14, 10).
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