| 摘要 |
The invention relates to a device comprising supports (3, 4) which can be moved relative to each other and on the mutually facing walls of which toothed profiles (6, 7) are provided. Each said toothed profile interacts with opposing segments (31, 32) of a rotatable gear (2), by means of the rotation of which the supports (3, 4) can be moved in opposite directions simultaneously in a synchronized manner. The gear (2) has a varying tip circle diameter (d) along the gear circumference, wherein the tip circle diameter (d) increases along a segment (31, 32), and an effective outer diameter (dw) of the gear (2) is arranged between the supports (3, 4) in a clamped rotational position, said effective outer diameter (dw) matching a target diameter. |
