| 摘要 |
The invention relates to a precision-mechanical positioning device for positioning a second component (2) relative to a first component (1) in any of the directions perpendicular to a combined straight line (3, 53) between the components. The positioning device comprises: in the first component, a basic member (5) having a first planar sliding surface (7); in the second component, a support member (6) having a second planar sliding surface (8); the support member being connected to the basic member such that the sliding surfaces bear against one another, forming a pair of sliding surfaces; the support member has holes (9) transverse to the plane of the pair of sliding surfaces, through which a locking device (4) extends to the basic member, the shanks (10) of the locking members having a thickness (D2) smaller than the hole diameters (D1); and clamping device(11) for pressing the support member into immobile contact with the basic member after the positioning has been completed. A layer of fatty lubricant (S1) has been provided between, the first sliding surface (7) and the second sliding surface (8), the layer generating a first friction (U1) between these sliding surfaces, and a bushing (20) and/or washers (22) being provided between the clamping device and the support member to generate a second friction (U2) between the clamping device and the support member. The first friction (U1) is substantially higher than the second friction (U2) in order to prevent the support member (6) from shifting relative to the basic member (5).
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