Compact 3D Contact Measuring Device

摘要

The 3D contact measuring device senses work pieces in machine tools for adjusting the zero point of a numerically controlled machine tool or for positioning tasks. The device comprises a preferably elongated housing, a sensing arm projecting from the housing and bearing a sensing tip. The sensing arm being movable in the direction of a measuring axis and pivotable in all directions about the measuring axis. A sensing lever is connected to the sensing arm and forms the first universal joint, and a measuring device for detecting a parameter, which characterizes the displacement and/or the pivoting of the sensing arm. A further control surface forms a second universal joint. An elongated toothed rack of a gear transmission is aligned along the measuring axis and is movably supported and is coupled to the sensing lever via the second universal joint.

主权项

1. A 3D contact measuring device, in particular for sensing workpieces in machine tools, which comprises:
a housing (3); a sensing arm (6) projecting from the housing (3) and bearing a sensing tip (7), said sensing arm being movable relative to the housing (3) in the direction of a measuring axis (9) and pivotable in all directions about the measuring axis (9) by means of a first universal joint (43); a sensing lever (46) connected to the sensing arm (6), at the end of which, which faces the sensing arm (6), a joint head (47) is formed, which comprises an outer control surface (44), which is rotatably supported at an inner control surface of the housing (3), so as to form the first universal joint (43) for pivoting the sensing arm (6), wherein, at its end (59), which faces away from the sensing arm (6), the sensing lever (46) comprises a further control surface (61) for a second universal joint (62); and a measuring device (26) for detecting a parameter characterizing the displacement and/or pivoting of the sensing arm (6), wherein the measuring device (26) comprises an elongated toothed rack (66) of a gear transmission (71), which is aligned along the measuring axis (9), is movably mounted, and is coupled via the second universal joint (62) to the sensing lever (46), wherein, in the resting state, the sensing arm (6), the sensing lever (46) and the toothed rack (66) are all arranged centrically to the measuring axis (9).